JP7219599B2 - Shutter device, opening operation method of shutter device, opening and closing operation method of shutter device - Google Patents

Description

The present invention relates to a shutter device, a shutter device opening operation method, and a shutter device opening/closing operation method. The shutter according to the present invention is a fire shutter, and more specifically, a fire shutter equipped with a shutter curtain that drops under its own weight when a brake is released by operating an automatic closing device or operating a manual closing device in the event of a fire.

In the event of a fire, the fire shutter activates an automatic closing device in response to a signal from the disaster prevention panel, releasing the brakes and allowing the shutter curtain to drop under its own weight to close the opening of the building. In addition, the fire shutter can be operated from the manual closing device to release the brake and drop by its own weight without relying on the fire detection signal. The fire shutter is provided with a so-called hazard prevention device in order to prevent an evacuee from being caught in the shutter curtain that falls under its own weight.

The mechanical safety device that mechanically stops the shutter curtain from falling under its own weight moves the brake release lever of the opener by the automatic closing device that receives the signal from the disaster prevention panel that receives the fire signal of the sensor in the event of a fire. Release the brake to allow the shutter curtain to descend under its own weight. When the seat plate at the bottom of the shutter curtain detects a person or an obstacle during its own weight descent, the brake release lever and brake of the opener/closer are restored to temporarily stop the shutter. When the obstacle is removed after the shutter is temporarily stopped, the shutter curtain descends again under its own weight to close the opening. Using such a fire shutter, there is a combined management shutter in which the opening and closing operation of the shutter is normally performed by driving the opening and closing device, and in the event of a fire, the automatic closing device lowers the shutter by its own weight (Patent Document 1).

Fire shutters are used as partition walls in distribution warehouses, etc., and are sometimes operated in a fully closed state. Due to the need for maintenance, etc., there is a request to open the normally fully closed shutters about once or twice a year. There is

When using a fire shutter as a partition wall, if a manual shutter is installed, the input shaft of the opener will be manually operated to open it, especially since the opening in the warehouse is large. , it takes a considerable amount of time to wind up the shutter curtain manually. On the other hand, when using an electric shutter such as a shutter that can be used together with management, the cost of laying a commercial power supply will be incurred. do not have.

Patent Document 2 describes that a generator is used as a power supply, but a commercial power supply that is a normal power supply (first power supply) and an emergency power supply (second power supply) that is a generator are used. It discloses a power source switching method for switching, and is premised on using a commercial power source in normal times.
JP 2017-96072 JP 2018-35560

SUMMARY OF THE INVENTION It is an object of the present invention to provide a shutter device suitable for use as a fire shutter normally used in a fully closed state or a fully opened state, and an opening operation method and an opening/closing operation method for the shutter device. be.

The first technical means adopted by the present invention is
Left and right guide rails installed on the frame,
A shutter curtain that opens and closes the opening between the left and right guide rails,
an opener and
an operation unit;
A power supply that enables electric opening and closing using an operation unit by supplying power to the opening and closing machine;
a manual closing device;
an automatic closing device that lowers the shutter curtain by its own weight upon input of a fire detection signal or operation of the manual closing device;
an obstacle detection means for detecting an obstacle when the shutter curtain descends;
a mechanical stopping means for mechanically stopping the shutter curtain that is falling under its own weight when an obstacle is detected, without using electric power;
an electrical stopping means for stopping the shutter curtain during motorized descent when an obstacle is detected;
with
The electric wire for supplying power to the switchgear has a connection part that can be connected from the outside,
The power source is a temporary power source connectable to the connecting portion, and the switch is normally not connected to any power source including the temporary power source,
When the opening is closed, the shutter curtain is lowered by its own weight, or the temporary power supply is connected to the connection section and the shutter curtain is electrically lowered by the closing operation from the operation section,
When opening the opening, the temporary power source is connected to the connecting portion, and the shutter curtain is electrically raised by the opening operation from the operating portion.
shutter device.
The second technical means adopted by the present invention is
Left and right guide rails installed on the frame,
A shutter curtain that opens and closes the opening between the left and right guide rails,
an opener and
an operation unit;
A power supply that enables electric opening using the operation unit by supplying power to the switch,
a manual closing device;
an automatic closing device that lowers the shutter curtain by its own weight upon input of a fire detection signal or operation of the manual closing device;
an obstacle detection means for detecting an obstacle when the shutter curtain falls under its own weight;
a mechanical stopping means for mechanically stopping the shutter curtain that is falling under its own weight when an obstacle is detected, without using electric power;
with
The electric wire for supplying power to the switchgear has a connection part that can be connected from the outside,
The power source is a temporary power source connectable to the connecting portion, and the switch is normally not connected to any power source including the temporary power source,
When closing the opening, the shutter curtain is lowered by its own weight,
When opening the opening, the temporary power source is connected to the connecting portion, and the shutter curtain is electrically raised by the opening operation from the operating portion.
shutter device.
The temporary power supply is a power supply that can be connected to a connection part provided in a wire that supplies power to the switch, and is not connected to the connection part in the normal use state of the shutter device, and is not connected to the switch. It is a power supply that is not in a state of being able to supply power to the shutter, and is a power supply that is temporarily connected to the connection portion only when the shutter needs to be electrically driven.
In one aspect, the electric wire for supplying electric power to the opening/closing machine extends to a lower portion of the skeleton or a lower portion of the guide rail through the frame or the guide rail, and the electric wire is connected to the outside at the lower portion. It has a connection that can be connected from
In one aspect, the electric wire for supplying electric power to the opening/closing device is provided with a connecting portion that can be connected from the outside at a portion above the opening (for example, the inside of the shutter case or the ceiling).
In one aspect, the temporary power source is a portable generator or power outlet connectable to the connection.
Temporary power sources that can be used in the present invention are not limited to generators and power outlets, and may be moving bodies equipped with batteries capable of supplying power for opening and closing shutters, such as electric vehicles.

In one aspect, the lower portion is provided with the manual closing device and/or the operating portion, and the connecting portion is provided adjacent to either the manual closing device or the operating portion. be.
In one aspect, the manual closing device and the operation part are provided in a housing as an operation box, and the connection part is provided in the housing (for example, the front part in the housing).
In one aspect, the manual closing device and the operation part are provided in separate housings, but may be provided in a common housing.
A separate housing independent of the manual closing device and the operation section may be provided in the frame, and the connecting section may be provided in the housing.

In one aspect, the shutter device is normally used with the opening fully closed or the opening fully open, and any power supply (including a commercial power supply and a battery) normally supplies power to the switch. not in a possible state.
In one aspect, the shutter device constitutes a partition wall in a warehouse or factory, and is normally used with the opening fully closed.
The self-weight lowering of the shutter curtain during times other than fire (e.g., during inspection) is typically performed using a manual closing device. The descent may be a gravity descent by directly actuating the brake release lever.

A third technical means adopted by the present invention is a shutter device opening operation method,
The shutter device
Left and right guide rails installed on the frame,
A shutter curtain that opens and closes the opening between the left and right guide rails,
an opener and
an operation unit;
a manual closing device;
an automatic closing device that lowers the shutter curtain by its own weight upon input of a fire detection signal or operation of the manual closing device;
an obstacle detection means for detecting an obstacle when the shutter curtain descends;
a mechanical stopping means for mechanically stopping the shutter curtain that is falling under its own weight when an obstacle is detected, without using electric power;
an electrical stopping means for stopping the shutter curtain during motorized descent when an obstacle is detected;
with
The electric wire for supplying power to the switchgear has a connection part that can be connected from the outside,
By connecting a temporary power supply to the connection unit, electric power is supplied to the switchgear by the temporary power supply to enable electric opening and closing using the operation unit,
The shutter device is normally used with the opening fully closed or the opening fully open, and the switch is normally not connected to any power source including the temporary power source,
When opening the shutter device in the fully closed state of the opening, the temporary power supply is connected to the connecting portion of the shutter device, and the shutter curtain is electrically raised by the opening operation from the operation portion.
A fourth technical means adopted by the present invention is a shutter device opening operation method,
The shutter device
Left and right guide rails installed on the frame,
A shutter curtain that opens and closes the opening between the left and right guide rails,
an opener and
an operation unit;
a manual closing device;
an automatic closing device that lowers the shutter curtain by its own weight upon input of a fire detection signal or operation of the manual closing device;
an obstacle detection means for detecting an obstacle when the shutter curtain falls under its own weight;
a mechanical stopping means for mechanically stopping the shutter curtain that is falling under its own weight when an obstacle is detected, without using electric power;
with
The electric wire for supplying power to the switchgear has a connection part that can be connected from the outside,
By connecting a temporary power source to the connecting portion, electric power is supplied to the opening and closing device by the temporary power source to enable electric opening using the operation portion,
The shutter device is normally used with the opening fully closed or the opening fully open, and the switch is normally not connected to any power source including the temporary power source,
When opening the shutter device in the fully closed state of the opening, the temporary power supply is connected to the connecting portion of the shutter device, and the shutter curtain is electrically raised by the opening operation from the operation portion.
In one aspect, the electric wire for supplying electric power to the opening/closing machine extends to a lower portion of the skeleton or a lower portion of the guide rail through the frame or the guide rail, and the electric wire is connected to the outside at the lower portion. It has a connection that can be connected from
In one aspect, the electric wire for supplying electric power to the opening/closing device is provided with a connecting portion that can be connected from the outside at a portion above the opening (for example, the inside of the shutter case is the ceiling).
In one aspect, the temporary power source is a portable generator or power outlet connectable to the connection.
Temporary power sources that can be used in the present invention are not limited to generators and power outlets, and may be moving bodies equipped with batteries capable of supplying power for opening and closing shutters, such as electric vehicles.

A fifth technical means adopted by the present invention is a method for opening and closing a shutter device,
Multiple shutter devices are installed,
Each shutter device
Left and right guide rails installed on the frame,
A shutter curtain that opens and closes the opening between the left and right guide rails,
an opener and
an operation unit;
a manual closing device;
an automatic closing device that lowers the shutter curtain by its own weight upon input of a fire detection signal or operation of the manual closing device;
an obstacle detection means for detecting an obstacle when the shutter curtain descends;
a mechanical stopping means for mechanically stopping the shutter curtain that is falling under its own weight when an obstacle is detected, without using electric power;
an electrical stopping means for stopping the shutter curtain during motorized descent when an obstacle is detected;
with
The electric wire for supplying power to the switchgear has a connection part that can be connected from the outside,
By connecting a temporary power supply to the connection unit, electric power is supplied to the switchgear by the temporary power supply to enable electric opening and closing using the operation unit,
Some or all of the shutter devices out of the plurality of shutter devices are normally used with the opening fully closed or fully open, and the opening/closing device is normally operated by any power source including the temporary power source. is not connected to the
When opening a desired shutter device whose opening is in a fully closed state, the temporary power supply is connected to the connection portion corresponding to the shutter device, and the shutter curtain is electrically raised by the opening operation from the operation portion,
When closing a desired shutter device whose opening is fully open, a temporary power supply is connected to the connecting portion corresponding to the shutter device, and the shutter curtain is electrically lowered by the closing operation from the operation portion, or the shutter curtain is closed. lower its own weight.
A sixth technical means adopted by the present invention is a method for opening and closing a shutter device,
Multiple shutter devices are installed,
Each shutter device
Left and right guide rails installed on the frame,
A shutter curtain that opens and closes the opening between the left and right guide rails,
an opener and
an operation unit;
a manual closing device;
an automatic closing device that lowers the shutter curtain by its own weight upon input of a fire detection signal or operation of the manual closing device;
an obstacle detection means for detecting an obstacle when the shutter curtain falls under its own weight;
a mechanical stopping means for mechanically stopping the shutter curtain that is falling under its own weight when an obstacle is detected, without using electric power;
with
The electric wire for supplying power to the switchgear has a connection part that can be connected from the outside,
By connecting a temporary power source to the connecting portion, electric power is supplied to the opening and closing device by the temporary power source to enable electric opening using the operation portion,
Some or all of the shutter devices out of the plurality of shutter devices are normally used with the opening fully closed or fully open, and the opening/closing device is normally operated by any power source including the temporary power source. is not connected to the
When opening a desired shutter device whose opening is in a fully closed state, the temporary power supply is connected to the connection portion corresponding to the shutter device, and the shutter curtain is electrically raised by the opening operation from the operation portion,
When closing a desired shutter device whose opening is fully open, the shutter curtain is lowered by its own weight.
In one aspect, the electric wire for supplying electric power to the opening/closing machine extends to a lower portion of the skeleton or a lower portion of the guide rail through the frame or the guide rail, and the electric wire is connected to the outside at the lower portion. It has a connection that can be connected from
In one aspect, the electric wire for supplying electric power to the opening/closing device is provided with a connecting portion that can be connected from the outside at a portion above the opening (for example, inside the shutter case).
In one aspect, the temporary power source is a portable generator or power outlet connectable to the connection.
Temporary power sources that can be used in the present invention are not limited to generators and power outlets, and may be moving bodies equipped with batteries capable of supplying power for opening and closing shutters, such as electric vehicles.
In one aspect, the plurality of shutter devices are installed in a warehouse or factory.
The self-weight lowering of the shutter curtain during times other than fire (e.g., during inspection) is typically performed using a manual closing device. The descent may be a gravity descent by directly actuating the brake release lever.

In one aspect, the shutter device comprises:
an actuating portion comprising a first actuating body movable in a first direction and a second direction and moving in the first direction to a brake release position;
a seat plate provided at the lower end of the shutter curtain and comprising an upper seat plate and a lower seat plate capable of moving upward relative to the upper seat plate;
a return cord-like member connected to the operating portion and configured to be pulled out as the shutter curtain descends;
a locking device that mechanically restricts withdrawal of the return string-like member by causing the lower plate of the shutter curtain that is descending to hit an obstacle and move upward relative to the upper plate;
with
The first operating body moves from the steady position in the first direction to the brake release position, moves the brake release lever in the brake release direction, mechanically releases the brake of the switch, and releases the brake. By moving from the position in the second direction, the brake release lever is moved in the brake return direction to mechanically return the brake of the switch, and is configured to be movable in the second direction from the steady position. cage,
The actuating unit includes first detecting means for detecting that the first actuating body has moved in a second direction from the normal position and outputting an obstacle detection signal to the control unit,
When the lower plate of the shutter curtain that is being electrically lowered hits an obstacle, the first operating body that is in the normal position is moved to the second position by the pulling of the cord-like member for return whose withdrawal is restricted as the shutter curtain is lowered. and the control unit having received an obstacle detection signal from the first detection means stops the electric lowering of the shutter curtain,
When the lower plate of the shutter curtain during its own weight descent hits an obstacle, the first operating body at the brake release position is pulled by the pulling of the return string-like member, which is restricted from being pulled out, as the shutter curtain descents. 2 to mechanically restore the brake of the opening/closing device to stop the shutter curtain from dropping under its own weight.
In one aspect, the first actuating body has a "steady position", a "position moved in the first direction from the steady position (brake release position)", and a "position moved in the second direction from the steady position (obstacle detection position)".
"Stationary position" refers to the position of the first effector during normal electrical opening and closing.
In one aspect, the brake is restored by moving the first actuator in the brake release position in the second direction back to the steady position. In this case, the "steady position" is also the obstacle detection position during dead weight descent.
The first actuator moves in the first direction upon activation of the automatic closing device (or by manual closing operation from the manual closing device) in the event of a fire. It does not matter whether it is directly connected to the movable part of the closure device or it moves in the first direction via another element or elements of the actuating part. In an embodiment to be described later, when the automatic closing device is actuated, the first effector moves together with the second effector in the first direction, and manual closing operation causes the first effector to move between the second effector and the second effector. It moves in the first direction integrally with the third effector.
In one aspect, the first operating body presses the brake release lever to release the brake by moving from the steady position in the first direction to hit the brake release lever of the opening/closing machine, and
The return cord member is connected to the first operating body.

In one aspect, the operating unit is provided with second detection means for detecting that the operating unit is in the brake release posture and outputting an operation confirmation signal to the control unit,
When an operation confirmation signal is input to the control unit, the control mode changes from the electric opening/closing mode to the gravity lowering mode.
In one aspect, the actuating portion comprises a second actuating body movable in a first direction and a second direction and connected with a self-closing device;
The second actuator moves in the first direction due to operation of the automatic closing device, thereby moving the first actuator in the stationary position in the first direction,
The second detection means detects movement of the second effector in the first direction.
In one aspect, the actuator comprises a third actuator movable in a first direction and a second direction and connected with a manual closure device,
The third actuation body moves in the first direction by operation of the manual closing device, thereby moving the first actuation body in the steady position in the first direction via the second actuation body. and
The second detection means detects movement of the second effector in the first direction accompanying movement of the third effector in the first direction.
In this way, with one common second detection means, the control mode changes from the electric opening/closing mode to the weight lowering mode in either case of operation of the automatic closing device or manual closing operation from the manual closing device. It is possible to invalidate the push button operation for opening and closing the shutter curtain and to stop the shutter curtain during electric opening and closing.

In the present invention, the temporary power source can be easily connected only when the shutter is opened or closed without connecting the shutter device to the commercial power source. It is possible to reduce the cost of laying work. In this embodiment, if there is a generator or a power outlet, the shutter device (not connected to the commercial power supply and not equipped with a battery), which is normally used in a fully closed state, can be electrically opened. It is also possible to electrically open a plurality of shutter devices using one portable generator. Further, the shutter device according to the present embodiment can detect an obstacle even if it is not normally connected to a power source and does not have a battery.

1 is a schematic front view of an electric shutter device equipped with a safety device; FIG. In the figure, the solid lines connecting the elements are electric wires, and the dashed-dotted lines are wires. 1 is an overall front view of an electric shutter device (opening fully closed state) provided with a safety device, omitting the ceiling; FIG. FIG. 3 is a partially enlarged view of FIG. 2 (the side on which the opening/closing machine is installed); 4 is a partially enlarged view of FIG. 3; FIG. FIG. 3 is a longitudinal sectional view of FIG. 2; FIG. 6 is a partially enlarged view of FIG. 5; FIG. 7 is a view similar to FIG. 6 with the opening fully open; FIG. 5 is a partial longitudinal sectional view of FIG. 4; FIG. 11 shows the automatic closing device (when monitored); It is a figure which shows an automatic closing device (at the time of brake release by a fire detection signal/self-weight descent). FIG. 3 shows the working part (each element in its stationary position); It is a figure which shows an operation|movement part (electric opening-and-closing mode). FIG. 10 is a diagram showing the operating portion (at the time of obstacle detection in the electric opening/closing mode); It is a figure which shows an operation|movement part (at the time of self-weight descent by automatic closing device operation|movement). It is a figure which shows an operation|movement part (at the time of the obstacle detection at the time of an automatic closing device operation|movement). It is a figure which shows an operation|movement part (at the time of self-weight descent by manual closing device operation). It is a figure which shows an operation|movement part (at the time of the obstacle detection by manual closing device operation). FIG. 4 is a part view showing a frame of an operating section; It is a part drawing which shows the 1st operation|movement body of an operation|movement part. It is a part drawing which shows the 2nd operation|movement body of an operation|movement part. It is a part drawing which shows the 3rd effect|action body of an operation|movement part. 1 shows a recovery mechanism integrated type according to the present embodiment. Details of the recovery mechanism according to the present embodiment are shown. It is a longitudinal cross-sectional view of the base end portion of the second lever of the recovery mechanism. It is a figure explaining operation|movement of the recovery mechanism integrated automatic closing apparatus which concerns on this embodiment. It is a figure which shows a locking device (normal time). FIG. 4 is a partially enlarged view showing a locking device (locked state); FIG. 10 is a diagram showing the lock device (at the time of removing the seat plate obstacle), and the shutter curtain is stopped. FIG. 29 is a view showing the locking device (when the seat plate obstacle is removed) in which each lever has been slightly rotated in the second direction from the state shown in FIG. 28, and the shutter curtain is stopped. It is a figure which shows a locking device (at the time of shutter curtain re-descent). It is a figure which shows a relay apparatus. FIG. 10 is a diagram showing the operation of the relay unit during electric descent, showing (A) steady position (during electric descent), (B) obstacle detection during electric descent, and (C) after obstacle removal (electric descent). . It is a diagram showing the operation of the relay unit during the descent of the dead weight, (A) steady position (at the time of stopping before the descent of the dead weight), (B) during the descent of the dead weight (operation of the automatic closing device, operation of the manual closing device), (C ) Obstacle detection during self-weight descent (same as normal position), (D) After obstacle removal (self-weight descent). 3A and 3B are a top view and a front view of the operation box; FIG. 34A is a sectional view of the operation box shown in FIG. 34, and FIG. 34B is a sectional view of the operation box shown in FIG. 34 taken along the line BB. It is a figure which shows the state which opened|released the cover body from the state of FIG. 35(A), and pulled out the automatic closing device restoration lever. It is a figure which shows the operation chart in the electrically-operated opening/closing mode of a shutter, (1) is at the time of ascent, (2) is at the time of descent, and (3) is at the time of obstacle detection. It is a diagram showing an operation chart of the shutter, (1) is when the brake is released during the electric rise, (2) is when the brake is released during the electric descent, and (3) is the obstacle during the self-weight descent. Indicates if a detection was made. FIG. 13 illustrates a delay mechanism; FIG. 40 is a partially enlarged view of FIG. 39; FIG. 40 is a longitudinal sectional view of FIG. 39; It is a figure which shows a delay mechanism, an upper figure is a front view, and a lower figure is a bottom view. It is a figure which shows the seat plate and detection lever which are in a normal attitude|position, a left figure is a longitudinal cross-sectional view, and a right figure is a front view. It is a figure which shows the seat plate and detection lever which are in an obstacle detection posture (upward movement posture of a lower seat plate), a left figure is a longitudinal cross-sectional view, and a right figure is a front view. 1 is a schematic front view of an electric shutter device (not using a commercial power source) equipped with a safety device; FIG. In the figure, the solid lines connecting the elements are electric wires, and the dashed-dotted lines are wires. 1 is a schematic front view of a shutter device (not using a commercial power supply) equipped with a safety device; FIG. In the figure, the solid lines connecting the elements are electric wires, and the dashed-dotted lines are wires. It is a front view of an operation box, and the cover is abbreviate|omitted. It is a front view of the operation box which concerns on other embodiment, and the cover is abbreviate|omitted. It is a schematic plan view of a warehouse in which a plurality of shutter devices are installed.

[A] Overall configuration of electric shutter with mechanical safety device As shown in FIGS. It comprises a winding shaft 2 for mounting and guide rails 3 erected on both left and right ends of the opening. The shutter curtain 1 is constructed by vertically connecting a plurality of elongated slats extending in the width direction of the opening, and a seat plate 4 is provided at the lower end. The winding shaft 2 is rotatably supported between left and right brackets 13 protruding from the body 12 . As shown in FIGS. 1 and 2, an opener M is provided above the opening at a position near one side in the width direction of the opening. The opener M is attached to a bracket 13 on one side in the width direction of the opening. In the illustrated embodiment, a shutter provided with a simple case for fire prevention is housed in the ceiling 14, but the shutter is housed in a rectangular shutter box (not shown) attached to the frame. You may do so. Normally, the shutter curtain 1 is electrically moved up and down by rotating the winding shaft 2 forward and backward by the opening/closing machine M to open and close the opening. As shown in FIGS. 2, 7, 8, etc., the seat plate 4 includes an elongated upper seat plate 40 extending in the width direction of the opening, and an elongated upper seat plate 40 on the lower side of the upper seat plate 40. It consists of a long lower seat plate 41 movably suspended, and as will be described later, the seat plate 4 detects an obstacle when the shutter curtain 1, which is electrically lowered or lowered by its own weight, hits an obstacle. It is one component of the obstacle detection means.

The shutter device includes an automatic closing device 6 for lowering the shutter curtain 1 by its own weight in the event of a fire, and an operating portion 7 (brake release/reset device). In the illustrated embodiment, the self-closing device 6 and the actuating portion 7 are spaced apart and are mechanically connected via a wire W1 (extending within the outer wire W1'). When a fire signal is input, the automatic closing device 6 operates and pulls the wire W1, so that the operating part 7 assumes the brake release posture and the brake of the opening/closing machine M is released. In addition, regardless of whether it is an electric descent or a self-weight descent, when the closed shutter curtain 1 hits an obstacle, the descent of the shutter curtain 1 can be stopped via the operating unit 7 (in the case of electric descent, is the actuation of the microswitch SW1, and mechanical return of the brake release lever ML in the case of self-weight descent. In this embodiment, the recovery mechanism 5 is integrated with the automatic closing device 6 . Specific configurations of the automatic closing device 6, the operating portion 7, and the recovery mechanism 5 will be described in detail later.

The shutter device has a control section, and as will be described later, different controls are performed in an electric opening/closing mode (normal mode) and a dead weight descent mode (fire mode). In this embodiment, the control unit is composed of an obstacle detection control panel 11A and a shutter control panel 11B. As shown in FIG. 1, in this embodiment, the operating unit 7 and the obstacle detection control panel 11A are electrically connected, and the obstacle detection control panel 11A and the shutter control panel 11B are electrically connected. The open/close operation switch 100 (first operation box 10A) in the operation box 10 and the obstacle detection control panel 11A are electrically connected. During electric lifting, an open signal, a close signal, and a stop signal based on the input from the switch are transmitted to the shutter control panel 11B via the obstacle detection control panel 11A. In the illustrated embodiment, the obstacle detection control panel 11A and the shutter control panel 11B are physically separated, but the control unit has the functions of the obstacle detection control panel 11A and the shutter control panel 11B. It may be one controller. The control unit will be detailed later. Further, as shown in FIG. 1, the sensor 6A and the disaster prevention board 6B are electrically connected, and the disaster prevention board 6B and the automatic closing device 6 are electrically connected. The present invention can also be applied to a manual shutter device, in which case the obstacle detection control panel 11A and closing switch D become unnecessary.

The shutter curtain 1 is wound around the winding shaft 2 in a state in which its downward movement is restricted by a brake, which is one component of the opening/closing device M, when the opening is fully opened (when retracted). If a fire breaks out in this state, the fire is detected by the fire detector 6A, the fire detection signal from the disaster prevention board 6B activates the automatic closing device 6, and the operating part 7 assumes the brake release posture via the wire W1. (in this embodiment, the first operating body 73 moves to the brake release position via the second operating body 74), the brake of the opening/closing machine M is released. When the brake is released, the shutter curtain 1 descends under its own weight while both ends in the width direction are guided by the grooves of the guide rails 3, and the seat plate 4 lands on the floor to fully close the opening. At this time, the shutter curtain 1 descends at a speed regulated by the function of a speed governor built in the opener M. As shown in FIG.

A brake release lever ML protrudes from the brake case of the opening/closing machine M (see FIG. 7). The brake that restricts the rotation of the winding shaft 2 is released. In electric shutters, an opener that includes a brake and a brake release lever that releases the brake are well known. In a specific embodiment, the brake means has a brake plate facing the output shaft of the opening/closing device or a rotating member that rotates integrally with the output shaft so as to be freely contactable and detachable. The brake plate is pressed by the biasing means, and the brake works to restrict the rotation of the winding shaft. By rocking the brake release lever against the spring, the brake plate is separated, the brake is released, the winding shaft can be rotated, and the shutter curtain is lowered by its own weight. Further, when the brake release lever is released, the spring, which is the biasing means, presses the brake plate to automatically return the brake and the brake release lever. That is, the brake of the opening/closing machine M is forcibly released by the movement of the brake release lever, and is returned by the urging means when the forced force by the brake release lever is released.

The shutter device is equipped with a so-called hazard prevention device, and when the seat plate 4 at the lower end of the shutter curtain 1 that is falling under its own weight hits an obstacle and detects the obstacle, the brake of the opening/closing machine M is reset via a return wire. to stop the descent of the shutter curtain 1. The return wire is composed of a first wire W2 and a second wire W3. In the upper part of the opening, a relay device 8 is provided closer to the opening width direction side where the opening and closing machine M is installed, and the seat plate 4 is positioned below the relay device 8 in the opening width direction. A locking device 9 is provided near one side of the . The lock device 9 includes a lock drum 90 positioned substantially directly below the relay device 8, a winding drum 91 adjacent to the lock drum 90, and a lock mechanism that locks the rotation of the lock drum 90 when an obstacle is detected. there is The first wire W2 and the second wire W3 are connected via the relay device 8. As shown in FIG. One end of the first wire W2 is connected to the first operating body 73 so as to move the brake release body (first operating body 73) in the brake return direction, and the other end is connected to the relay device 8. The first wire W2 extends inside the outer wire W2'. One end of the second wire W3 is connected to the relay device 8, and the other end is wound around the lock drum 90 of the lock device 9 provided on the seat plate 4. is connected so as to be able to wind on the The second wire W3 is pulled out so as to extend along the surface portion of the shutter curtain 1 as the shutter curtain 1 descends. The lock device 9 is provided on the upper plate 40, and the lower plate 41 of the shutter curtain 1 that is being lowered hits an obstacle and moves upward relative to the upper plate 40, thereby causing the return wire (second wire W3) to move upward. ) is mechanically restricted, and the return wire (second wire W3+first wire W2) whose extension is restricted pulls the brake release body (first operating body 73) in the brake return direction. . In this manner, when the lower plate 41 of the shutter curtain 1 during its own weight descent hits an obstacle, the return wire (second wire W3+first wire W2) causes the brake releasing body (first operating body 73) to be released. to the brake return position to stop the drop of the shutter curtain 1 by its own weight.

When the obstacle is removed, the return wire can be pulled out, the brake release body (first operating body 73) moves in the brake release direction, and the shutter curtain 1 descends again under its own weight. In addition, after the obstacle is removed, the timing at which the shutter curtain 1 descends again by its own weight is delayed. As will be described later, even when the seat plate 4 at the lower end of the shutter curtain 1 during the electric descent hits an obstacle, the return wire (second wire W3+first wire W2) is applied to the brake releasing body (first operating body 73). ) is detected to stop the shutter curtain 1 that is being electrically lowered.

As shown in FIGS. 39, 43, and 44, in the illustrated mode, the obstacle detection means is a detection lever provided rotatably between an upper seat plate 40 and a lower seat plate 41 that constitute the seat plate 4. 42 is used, and the configuration of this obstacle detection means will be described in detail later. In the illustrated embodiment, the lock device 9 is attached to the upper seat plate 40 at one side in the length direction of the seat plate 4, specifically, at a position closer to the opening width direction side where the opener M is provided. , a rotatable lock drum 90, a rotatable winding drum 91, a first rotating lever 92, a second rotating lever 93, a third rotating lever 94, a case 95 that accommodates them, The structure of this locking device 9 will be described in detail later. Also, the configuration of the means for delaying the re-descent of the self-weight after obstacle removal will be described in detail later.

As shown in FIG. 6, the relay device 8 is attached to the receiving member 16 of the lintel 15 above the opening. The receiving member 16 is an elongated member having a square cross section and is attached between the lower ends of the left and right brackets 13 that support both ends of the winding shaft 2 . As shown in FIG. 2, the relay device 8 is located on one side of the opening in the width direction of the opening, directly above the locking device 9 when viewed from the front, and is arranged so as to correspond to the vertically extending wire W3. there is Further, as shown in FIG. 6, the relay device 8 is located on the opposite side of the frame 12 with respect to the shutter core C. As shown in FIG.

As shown in FIG. 31 , the relay device 8 includes a rotating body 80 positioned above the opening and extending in the front-rear direction (indoor/outdoor direction), and a mounting base 81 attached to the receiving member 16 . The mounting base 81 includes left and right support pieces 810 to which the rotating body 80 is rotatably mounted, and mounting pieces 811 to which the receiving member 16 is attached. The rotating body 80 rotates about a rotation fulcrum 82 such that the first end and the second end in the front-rear direction move up and down. A fixing portion 83 for the end of the first wire W2 is formed at the first end, and a fixing portion 84 for the upper end of the second wire W3 is formed at the second end. The fixing part 83 is composed of a first fixing part 830 that fixes the end of the first wire W2 exposed from the outer wire W2' while leaving a residual end, and a second fixing part 831 that fixes the residual end. , a first fixing portion 830 and a second fixing portion 831 firmly fix the end portion of the first wire W2. A fixing portion 832 for the end of the outer wire W2' is provided below the fixing portion 83. As shown in FIG. The fixing portions 832 are attached to lower portions of the left and right support pieces 810 of the mounting base 81 . The first wire W2 and the outer wire W2' are guided in a direction away from the shutter core C through a guide 160 attached to the receiving member 16, and are connected to the operating mechanism (first operating body 73) of the operating section 7. ing. The fixing portion 84 sandwiches the end portion of the second wire W3, and the end portion of the second wire W3 is formed with a locking portion 840 having a diameter larger than the wire diameter. is firmly fixed. When the second wire W3 fixed to the fixing portion 84 formed at the second end is pulled downward, the rotating body 80 rotates around the rotation fulcrum 82, and the second end moves downward. , the first end moves upward to pull the first wire W2. As shown in FIG. 31, the relay device 8 includes a temporary fixing screw 85 for temporarily fixing one support piece 810 and the rotating body 80 at a predetermined position. The temporary fixing screw 85 temporarily fixes the rotating body 80 to the mounting base 81 at a predetermined angle (an appropriate angle for wire attachment) to restrict its rotation. By fixing the first wire W<b>2 and the second wire W<b>3 to the rotating body 80 in the posture, adjustment of the posture of the rotating body 80 becomes unnecessary when the wires are attached to the relay device 8 . The temporary fixing screw 85 is removed after the wire is fixed.

As shown in FIGS. 1 to 3, an operation box 10 is provided on the wall near the shutter device at a height that is easy to operate. The operation box 10 includes a right first operation box 10A having a vertically elongated rectangular parallelepiped box and a left second operation box 10B having a vertically elongated rectangular parallelepiped box. Details of the operation box 10 are shown in FIGS. 34 to 36. FIG. In the illustrated embodiment, the internal space of one box is divided into left and right spaces by a vertical partition plate 10C to form the first operation box 10A and the second operation box 10B. Boxes may be adjacent to each other. A first cover 101 is openable and closable on the front surface of the first operation box 10A, and a second cover 102 is openable and closable on the front surface of the second operation box 10B. The first operation box 10A is provided with a first key means (cylinder lock) for locking the closed state of the first lid body 101, and the first lid body 101 is inserted with a key for locking and unlocking the first key means. has a keyhole 1010 for The second operation box 10B is provided with second key means (cylinder lock) for locking the closed state of the second cover 102, and the second cover 102 is inserted with a key for locking and unlocking the second key means. has a keyhole 1020 for

The first operation box 10A is a switch box, and in the first operation box 10A, opening/closing operation switches 100 (each switch not shown) consisting of an open switch U, a close switch D, and a stop switch S are arranged. there is The open/close operation switch 100 is electrically connected to the control unit (obstacle detection control panel 11A, shutter control panel 11B). 1 rises, and when the closing switch D is pressed, the shutter curtain 1 is lowered by the opening/closing machine M via the control section, and when the stop switch S is pressed, the driving of the opening/closing machine M is stopped via the control section and the shutter is closed. Curtain 1 stops.

The second operation box 10B is a manual operation box, and is provided with an operation portion of a manual closing device and an operation portion of a restoration device of the automatic closing device 6. As shown in FIG. In the second operation box 10B, an emergency closing switch (push switch in the illustrated embodiment) 103 for manual closing is provided at the lower part of the second lid 102, and the front side of the second operation box 10B is provided. A rotary lever 104 is rotatably provided adjacent to the second cover body 102 at the side portion. In the second operation box 10B, a wire end fixing portion 105 for fixing the end (other end) of the wire W4 for manual operation with a screw is provided, and an automatic closing device recovery lever 106 is accommodated. The pressing operation of the emergency closing switch 103 and the manual rotating operation of the rotating lever 104 can be performed in a state where the second cover 102 of the second operation box 10B is closed. The recovery operation of the automatic closing device 6 using 106 must be performed by unlocking the second key means and opening the second cover 102 .

The operating portion (emergency closing switch 103, rotating lever 104) of the manual closing device is mechanically connected to one end of a wire W4 for manual operation so that the operating portion 7 can be operated to release and return the brake. there is The other end of the wire W4 is connected to the operating portion 7. As shown in FIG. The second cover 102 of the second operation box 10B has an opening corresponding to the emergency closing switch 103, and the opening is closed by a cover. When the closing switch 103 is pressed, it is operated. Also, the wire W4 extends inside the outer wire W4'. The operation unit of the manual closing device operates to release the brake by a first operation (pushing operation of the emergency closing switch 103) from the state before the brake release operation, and operates to release the brake from the state after the brake release operation. (Rotating lever 104) operates to restore the brake. Here, a force is applied to the wire W4 to pull up the wire end fixing portion 104 (in FIG. 35(B)) by the second coil spring 77 (described later) of the operating portion 7. The wire end fixing portion 105 is moved upward to lock the wire W4 so that it does not loosen. When the emergency closing switch 103 is pressed, the lock is released and the wire end fixing portion 105 is moved upward by a predetermined distance to loosen the wire W4 which is in a tensioned state, and the rotating lever 104 moves forward with respect to the surface of the cover body 101. Tilts in an inclined manner (brake release posture). Further, when the inclined rotating lever 104 is rotated downward (indicated by an arrow in FIG. 35(B)), the wire end fixing portion 105 is pulled down to the lock position described above, and the wire W4 is pulled by a predetermined distance. , the movement of the wire W4 is restricted by the lock mechanism in a state in which tension is applied to the wire W4 (brake return posture). After that, the rotating lever 104 is rotated upward and housed in the second operation box 10B to enter the set state. In this manner, the shutter curtain can be lowered and stopped by the operation portion of the manual closing device without opening the second cover 102 of the second operation box 10B. The recovery lever 106 constitutes a recovery device of the automatic closing device 6 together with the recovery mechanism 5 . A description of the recovery lever 106 will be given later in relation to the recovery mechanism 5 of the automatic closing device 6 .

As shown in FIG. 6, a receiving member 16 of the lintel 15 above the opening is provided with a smoother element 17 on the opposite side of the frame 12 with respect to the shutter core C. Contact or interference with the lintel 15, the relay device 8, etc. is prevented. The smoother element 17 is fixed (for example, welded) to the receiving member 16 and has two rollers 170 that are stepped in the width direction and the height direction of the opening. Note that the smoother element 17 may be a single roller. The number of smoother elements 17 is appropriately selected, for example, from 1 to 5 according to the width of the opening. An emergency switch 18 is provided on the upper side 150 of the lintel 15. In the shutter device that is normally opened and closed electrically, if the shutter curtain 1 does not stop at the upper limit due to a failure of the limit switch LS or the like, an emergency switch 18 is provided. , the emergency switch 18 as an upper limit overrun detector is actuated to stop the opening/closing machine M from raising the shutter curtain 1 . As shown in FIG. 7, the emergency switch 18 has a first contact piece 180 projecting into the moving path of the shutter curtain 1 (the seat plate 4 comes into contact when the shutter curtain 1 rises beyond the upper limit position). Then, the second abutment piece 181 rises vertically and extends substantially horizontally rearward (when the shutter curtain 1 hits an obstacle during its descent, the shutter curtain 1 continues due to failure of the obstacle detection means, etc.). When the shutter curtain 1 is let out by the winding shaft 2, the diameter of the shutter curtain 1 wound up on the winding shaft 2 becomes large, and the shutter curtain 1 hangs down and comes into contact with the winding shaft 2).

[B] Automatic Closing Device The automatic closing device 6 is activated by a fire detection signal input from the disaster prevention board 6B, and moves the brake release lever ML via the wire W1 and the operating portion 7 to release the brake. An embodiment of the automatic closing device 6 will be described with reference to FIGS. 9 and 10. FIG. The automatic closing device 6 shown in FIGS. 9 and 10 is merely one embodiment, and the present invention is not limited by the configuration of the automatic closing device 6 shown. 9 and 10 are for explaining the components and operations of the automatic closing device 6. In this embodiment, as shown in FIGS. 22 to 25, the automatic closing device 6 and the recovery mechanism 5 are integrated. 9 and 10, the automatic closing device restoration wire W5 is connected to the tip of the operating rod 60, but it should be noted that the automatic closing device restoration wire W5 is connected to the restoration mechanism 5 in this embodiment. sea bream.

[B-1] Components and operation of the automatic closing device The automatic closing device 6 includes an operating rod 60 supported so as to reciprocate in a first direction and a second direction, and the operating rod 60 moving in the first direction. It is connected to a coil spring 61 that biases, a solenoid 62 that is energized by the input of a fire detection signal, and a plunger 620 of the solenoid 62. When the solenoid is energized and the plunger is pulled, the position changes from the first posture to the second posture. and a latch 63 that tilts (rotates) to the posture. The latch 63 is biased toward the first posture by a coil spring 64 .

The automatic closing device 6 has a frame 65 including a U-shaped support in a side view with a horizontal piece 650 and opposing vertical pieces 651 and 652. It is inserted and supported so as to reciprocate. A contact piece 610 of the coil spring 61 is fixed at a predetermined position between the vertical pieces 651 and 652 on the axis of the operating rod 60, one end of the coil spring 61 abuts on the vertical piece 651, and the other end is in contact with the vertical piece 651. It is in contact with the contact piece 610 . The solenoid 62 is attached to the top surface of the horizontal piece 650 . Further, on the upper surface of the horizontal piece 65, two microswitches MS arranged side by side and a rotary operation piece 66 for actuating the microswitches MS are provided. The turning operation piece 66 is urged to turn the microswitch MS from the OFF state to the ON state. When the microswitch MS changes from ON to OFF, it cuts off the fire detection signal applied to the solenoid 62 and informs the disaster prevention board 6B that the automatic closing device 6 has released the brake.

One end of the brake release wire W1 (shown only in the upper diagrams of FIGS. 9 and 10) is fixed to the tip of the operating rod 60 (the end opposite to the first direction). The shaft-shaped engaging portion 630 of the latch in the first posture engages with the engaged groove 600 of the operating rod 60 in the biased state, thereby moving the operating rod 60 in the first direction. is regulated, and when the solenoid is energized by the input of the fire detection signal, the latch 63 tilts from the first posture to the second posture, and the locking state between the locking portion 630 and the locked groove 600 is changed. Then, the force of the coil spring 61 causes the operating rod 60 to move in the first direction, and the wire W1 fixed to the tip of the operating rod 60 moves the operating portion 7 into the brake release posture, thereby releasing the brake. be.

As shown in FIG. 9, the rotation operation piece 66 is brought into contact with the contact piece 610, so that the rotation is restricted and the microswitch MS is in the ON state. As shown in FIG. 10, once the automatic closing device 6 is actuated, the coil spring 61 expands so that the abutment piece 610 is separated from the pivotal actuation piece 66 and comes into contact with the vertical piece 652, and the pivotal actuation piece 66 is released. As it rotates, the microswitch MS is turned OFF, and the energization of the solenoid 62 is interrupted. The latch 63 is moved to the first posture side by the coil spring 64, and the shaft-shaped locking portion 630 is in contact with the upper edge 601 of the operating rod 60 (see FIG. 10).

[B-2] Recovery Mechanism of Automatic Closing Device The recovery mechanism 5 of the automatic closing device 6 will be described with reference to FIGS. 22 to 25. FIG. FIG. 22 shows the automatic closing device 6 with the associated recovery mechanism 5 and FIG. 23 shows the recovery mechanism 5 . For the specific elements and operations of the automatic closing device 6, the above description based on FIGS. 9 and 10 can be used as appropriate. As shown in FIG. 22, the recovery mechanism 5 is provided adjacent to the automatic closing device 6, so to speak, as a recovery mechanism-integrated automatic closing device. The base 67 of the automatic closing device 6 and the base 55 of the recovery mechanism 5 are integrated by screws by superimposing the rising pieces of L shape in side view. are connected and integrated. The automatic closing device 6 and the recovery mechanism 5 may be separated from each other, but it is desirable to dispose the recovery mechanism 5 adjacent to the automatic closing device 6 from the viewpoint of interlocking movement and space saving.

The recovery mechanism 5 includes a first lever 50 as a first movable body and a second lever 51 as a second movable body. The first lever 50 is connected to the actuating rod 60 of the automatic closing device 6, and is movable integrally with the actuating rod 60 between a first position in a standby state and a second position in an actuated state. be. A brake release wire W1 is connected to the operating rod 60. As shown in FIG. The brake release wire W1 may be connected to the first lever 50, or the first lever 50 and the operating rod 60 may be formed from one member. The second lever 51 is movable (rotatable in this embodiment) between a first posture and a second posture, and is connected to an automatic closing device restoration wire W5. When the first lever 50 moves from the first position to the second position, the second lever 51 allows the movement without hindrance and maintains the first posture. After moving to position 2, by moving the second lever 51 from the first posture to the second posture, the first lever 50 and the operating rod 60 of the automatic closing device 6 are moved to the first position (standby posture). It is configured to forcibly move to The base 55 of the restoring mechanism 5 has a standing stand 56 at the end on the side away from the automatic closing device 6. An outer wire W1' through which the brake releasing wire W1 is inserted, and an automatic closing device restoring wire W5. are fixed at the ends of the outer wires W5' through which the . A more specific configuration of the recovery device (recovery mechanism 5 + automatic closing device recovery lever 106) will be described in detail below.

The first lever 50 is connected to an operating lever 60 of the automatic closing device 6, and reciprocates integrally with the operating lever 60 between a first position (standby state) and a second position (operating state). is movable. A brake release wire W1 is connected to the actuating rod 60, and the brake releasing wire W1 is movable as the actuating rod 60 and the first lever 50 of the automatic closing device 6 move. The moving direction of the operating rod 60 and the first lever 50 of the automatic closing device 6 and the length direction of the portion of the brake release wire W1 extending from the connecting portion with the operating rod 60 are the same, and the automatic closing device 6 is operated. Then, the operating lever 60 and the first lever 50 of the automatic closing device 6 at the first position move to the second position, thereby pulling the brake release wire W1 and releasing the brake.

The first lever 50 includes a first plate-shaped portion 500 extending along a horizontal plane and a second plate-shaped portion 501 extending along a vertical plane. is integrally formed, and a horizontally rectangular guide opening 503 is formed on the side of the second plate-like portion 501 that is separated from the first plate-like portion 500 . The orientation of the surfaces of the first plate-shaped portion 500 and the second plate-shaped portion 501 is not limited to the illustrated aspect. The first plate-like portion 500 of the first lever 50 is connected to the operating rod 60 of the automatic closing device 6, and the operating rod 60 is connected to the brake release wire W1. The guide opening 503 is a horizontally elongated hole extending in the movement direction of the first lever 50, and has a first edge 5030 on the side of the automatic closing device 6 and a second edge 5031 on the side away from the automatic closing device 6. (See FIG. 24). The projecting piece 502 has a first edge 5020 on the side of the automatic closing device 6 and a second edge 5021 on the side away from the automatic closing device 6 (see FIG. 24).

The second lever 51 is a rotating lever that can rotate around a rotating support shaft 53 on the base end side (lower end side in the illustrated embodiment), and has an automatic closing device restoration wire W5 connected to its tip end. there is In the illustrated embodiment, a vertical piece 530 that supports the pivot shaft 53 is formed to rise from the base 55 . The second lever 51 is rotatable between a first tilted posture in which the tip side is tilted toward the automatic closing device 6 and a second tilted posture in which the tip side is tilted away from the automatic closing device 6. It's becoming The second lever 51 is biased by a spring 52 as biasing means so as to maintain the first tilted posture. Therefore, normally, it is in the first tilted posture by the force of the spring 52, and when the automatic closing device restoration wire W5 is pulled against the spring force, it rotates from the first tilted posture to the second tilted posture. When the pulling force of the automatic closing device restoring wire W5 is released, the urging force of the spring 52 automatically restores the first inclined posture.

A guide shaft 54 is provided on the base end side of the second lever 51 at a position slightly separated from the pivot shaft 53 (in the illustrated embodiment, slightly above). extending in parallel. The guide shaft 54 is inserted through the guide opening 503 , and depending on the posture of the second lever 51 and the position of the first lever 50 , the first position on the side of the automatic closing device 6 and the automatic It is movable in the lengthwise direction of the guide opening 503 between a second position on the side remote from the closing device 6 . The relationship between the position of the guide shaft 54 in the guide opening 503, the posture of the second lever 51, and the position of the first lever 50 will be described later.

FIG. 24 shows the details of the spring 52, which is the biasing means. The two legs 522 are hooked on the guide shaft 54, and the second lever 51 is biased by the spring 52 so as to maintain the first tilted posture. By pulling the automatic closing device restoration wire W5, when the second lever 51 rotates from the first tilted posture to the second tilted posture, the spring 52 accumulates a force for returning to the original posture. When the pulling force of the automatic closing device restoring wire W5 is released, the second lever 51 automatically rotates and returns to the first tilted posture due to the accumulated force of the spring 52 .

As shown in FIG. 36, the other end side of the automatic closing device restoration wire W5, one end of which is fixed to the tip of the second lever 51, extends into the second operation box 10B, and extends into the second operation box 10B. It is horizontally guided via a provided pulley 107, and a T-shaped pull handle as an automatic closing device recovery lever 106 is provided at the end. The automatic closing device restoration wire W5 extends inside the outer wire W5' except for both end portions, and if necessary, is wound around a guide member (not shown) such as a pulley as appropriate to the second operation box 10B. You will be guided to When the activated automatic closing device 6 is to be restored, the second key means of the second operation box 10B is unlocked to open the second cover 102 and the automatic closing device stored in the second operation box 10B is opened. By holding the closing device restoration lever 106 and pulling out the end of the automatic closing device restoration wire W5 and pulling it through the pulley 107, the second lever 51 in the first posture is rotated to the second posture. When the automatic closing device 6 is actuated and the first lever 50 is at the second position, the guide shaft 54 contacts or approaches the second edge 5031 of the guide opening 503 on the side away from the automatic closing device 6. When the second lever 51 rotates from the first posture to the second posture, the position of the guide shaft 54 relative to the rotary support shaft 53 moves, so that the movement of the guide shaft 54 moves the first lever 50 to the second position. Move to position 1.

The operation of the automatic closing device 6 with the recovery mechanism 5 will be described with reference to FIG. Regarding the state of the automatic closing device 6, the upper diagram in FIG. 25 corresponds to FIG. 9, and the middle diagram in FIG. 25 corresponds to FIG. can be done. The top view of FIG. 25 shows the self-closing device 6 in the standby state, the brake being effective. The first lever 50 of the return mechanism 5 is in the first position away from the automatic closing device 6, the second lever 51 is in the first posture inclined toward the automatic closing device 6, and the second lever A guide shaft 54 provided at 51 is at a first position on the side of the automatic closing device 6 in the length direction of the guide opening 503 and is in contact with or close to the first edge 5030 . A first edge portion 5020 of the protruding piece 502 of the first lever 50 is separated from the contact portion 57 which is formed in a raised shape from the base 55 , and a second edge portion 5021 is separated from the pivot shaft 53 . (see FIG. 24).

When the automatic closing device 6 operates in this standby state, the operating lever 60 of the automatic closing device 6 moves away from the return mechanism 5, and the first lever 50 connected to the operating lever 60 moves toward the automatic closing device 6. The wire W1, which moves and is connected to the operating rod 60 fixed to the first lever 50, is pulled toward the automatic closing device 6, and the operating portion 7 assumes the brake releasing posture, thereby releasing the brake. When the first lever 50 moves, the guide shaft 54 provided on the second lever 51 moves relative to the first lever 50 within the guide opening 503 of the first lever 50, so that the second lever 51 The movement of the first lever 50 from the first position to the second position is permitted, and the first posture inclined toward the automatic closing device 6 side is maintained. The view in FIG. 25 shows the self-closing device 6 in the activated state, with the brake released. The first lever 50 of the return mechanism 5 is in the second position near the automatic closing device 6 side, the second lever 51 is maintained in the first posture inclined toward the automatic closing device 6 side, and the second lever A guide shaft 54 provided at 51 is at a second position on the side away from the automatic closing device 6 in the longitudinal direction of the guide opening 503 and is in contact with or close to the second edge 5031 . A first edge portion 5020 of the protruding piece 502 of the first lever 50 is in contact with a contact portion 57 rising from the base 55 .

The other end of the automatic closing device restoration wire W5 is connected to the automatic closing device restoration lever 106 provided in the second operation box 10B. When it is desired to restore the automatic closing device that has been activated by the input of the fire detection signal, the second key means of the second operation box 10B is unlocked, the second cover 102 is opened, and the inside of the second operation box 10B is opened. By pulling out the end of the automatic closing device restoration wire W5 by holding the automatic closing device restoration lever 106 stored in the , and pulling it through the pulley 107, the second lever 51 in the first posture is changed to the second posture. Rotate. In conjunction with the rotation of the second lever 51 from the first posture to the second posture, the first lever 50 and the operating rod 60 move from the second position to the first position. That is, by pulling the automatic closing device restoring wire W5, the operating rod 60 (and the first lever 50) is moved from the second position to the first position while compressing the coil spring 61, and the shaft-shaped locking is performed. When the portion 630 slides on the upper edge 601 of the operating rod 60 and engages with the engaged groove 600 (see FIGS. 9 and 10), the latch 63 assumes the first posture, The microswitch MS is turned ON, and the automatic closing device 6 returns to the standby posture shown in the lower diagram of FIG.

As shown in FIG. 25, when the automatic closing device 6 is activated and the first lever 50 is at the second position, the guide shaft 54 moves toward the second position of the guide opening 503 away from the automatic closing device 6 . When the second lever 51 rotates from the first posture to the second posture, the position of the guide shaft 54 with respect to the rotation support shaft 53 contacts the second edge portion 5031 . The guide shaft 54 moves the first lever 50 to the first position. As is clear from comparing the middle diagram of FIG. 25 and the bottom diagram of FIG. 25, the guide shaft 54 in the middle diagram of FIG. 6 side, and in the lower diagram of FIG. The point of force when the automatic closing device restoration wire W5 is pulled is the distal end side of the second lever 51, and the points of application of the force when the second lever 51 rotates are the guide shaft 54 and the second edge 5031 of the guide opening 503. The distance from the rotation fulcrum 53 to the point of force is greater than the distance from the rotation fulcrum 53 to the point of action, forming a so-called force boosting mechanism. That is, by pulling the automatic closing device restoration wire W5 to rotate the second lever 51, the first lever 50 and the operating rod 60 are pulled by the boosting mechanism. The operating force can be reduced as compared with the case of directly pulling the 60 .

The lower diagram of FIG. 25 shows a state in which the automatic closing device restoration wire W5 is pulled to restore the automatic closing device 6, in which a force is applied to pull the automatic closing device restoration wire W5, and the second lever 51 is moved to the first position. 2 tilted position. At this time, the spring 52 accumulates a force to rotate the second lever 51 from the second tilted posture to the first tilted posture. When the pulling force of the automatic closing device restoration wire W5 is released, the second lever 51 automatically returns to the first posture by the biasing force of the spring 52, and the monitoring state or normal position shown in the upper diagram of FIG. becomes.

[C] Operating part (brake release/return device)
[C1] Configuration of operating section The configuration of the operating section 7 will be described with reference to FIGS. 11 to 21. FIG. The operating part 7 includes a frame 70, a first guide shaft 71 and a second guide shaft 72 provided on the frame 70, a first operating body 73 movable on the first guide shaft 71, the first guide shaft 71 and a second guide. It comprises a second actuator 74 movable on a shaft 72, a third actuator 75 movable on a second guide shaft 72, a first microswitch SW1 and a second microswitch SW2. FIG. 11 shows the actuating part 7 in a stationary posture (at the time of normal electric opening and closing), and each element is in the stationary position. 12 and 13 show the movement of the actuating part 7 during electric descent, FIGS. 14 and 15 show the movement of the actuating part 7 when the automatic closing device is activated, and FIGS. The movement of the actuating part 7 is shown. Each element will be described in detail below. In the following description, terms such as “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, etc. that represent the attitudes and directions of elements are based on the illustrated embodiment. It will be understood by those skilled in the art that the actual mounting orientation of the elements may vary (eg, upside down or sideways swapping). 11 to 17, leftward movement of the first operating body 73 (brake release lever ML) is movement in the brake release direction, and leftward movement of the first operating body 73 (brake release lever ML) is rightward movement. The movement is movement in the brake return direction. Also, some elements are inked to make them easier to read.

As shown in FIG. 18, the frame 70 has a top wall 700 and side walls 701 and 702 hanging down from left and right ends of the top wall 700 . An opening 7000 is formed in the upper wall 700 to receive the tip portion of the brake release lever ML so as to be movable in the left-right direction. procrastinating. Guide shafts 71 and 72 extending horizontally in parallel are provided between opposing side walls 701 and 702 of the frame 70 . In the illustrated embodiment, a total of four guide shafts including two first guide shafts 71 and two second guide shafts 72 are provided. The first guide shafts 71 are arranged inside the second guide shafts 72 so as to be stepped in the height direction. By attaching a cover body (not shown) having a U-shaped side view to cover the frame 70 like a lid, the operating part 7 is prepared as a box body, and the upper wall 700 faces the opener M in close proximity. It is attached.

As shown in FIG. 19 , the first operating body 73 includes a horizontally extending upper side 730 , side sides 731 and 732 hanging down from the left and right ends of the upper side 730 in a facing manner, and the center of the lower end of the side side 732 . The left and right sides 731 and 732 are formed with insertion holes 7310 and 7320 through which the first guide shaft 71 is inserted. One end of a first wire W<b>2 constituting a return wire is fixed to the right side 732 of the first operating body 73 . An insertion groove 7321 for the first wire W2 is formed in the side 732, and a screw hole 7330 is formed in the bent side 733. As shown in FIG. The insertion groove 7321 communicates with the grooves between the bent sides 733 , and a locking portion (larger diameter than the groove width of the insertion groove 7321 ) for the end of the first wire W2 of the return wire is provided above the bent side 733 . ) are positioned, and the plate 734 is fixed to the bent sides 733 with screws 735 so as to cover the insertion grooves 7321 between the bent sides 733 from below. A pressing piece 736 protrudes from the central portion of the left side edge 731 of the first operating body 73 .

The first operating body 73 is slidable on the first guide shaft 71 in a first direction (left side in the drawing) and in a second direction opposite to the first direction (right side in the drawing). . The pressing piece 736 of the first operating body 73 at the steady position is separated from the brake release lever ML (it may be close to or in contact with the brake release lever ML without pressing it), and the brake of the opening/closing machine M is in a valid state. By moving the first operating body 73 in the stationary position in the first direction, the pressing piece 736 of the first operating body 73 presses the brake release lever ML in the first direction, thereby releasing the brake of the opening/closing machine M. release.

In the illustrated embodiment, the first operating body 73 in the steady position moves in the first direction to assume the brake release posture as the second operating body 74 moves in the first direction. When the second actuating body 74 moves in the first direction, the movement of the third actuating body 75 in the first direction due to the operation of the automatic closing device 6 or the manual closing operation from the manual closing device 10 If it is. When the first wire W2 of the return wire is pulled to the right, the first operating body 73 in the brake release posture moves in the second direction and assumes the brake return posture (steady position). The first actuator 73 in the stationary position moves in the second direction by pulling the first wire W2 of the return wire to the right, turning the first microswitch SW1 from ON to OFF. That is, the first operating body 73 has a steady position (brake return position), a position moved in the first direction from the steady position (brake release position), and a position moved in the second direction from the steady position (obstacle detection position). ).

As shown in FIG. 20 , the second operating body 74 includes a horizontally extending horizontal 740 , side edges 741 and 742 extending vertically with respect to the left and right ends of the horizontal edge 740 , and the lower end of the side edge 741 . Left and right sides 741 (upper half) and 742 are formed with insertion holes 7410 and 7420 through which the first guide shaft 71 is inserted. An insertion hole 7411 through which the second guide shaft 72 is inserted is formed in the lower half of the side edge 741 . One end of a brake release wire W1 extending from the automatic closing device 6 is fixed to the left side edge 741 of the second operating body 74 . A coil spring (not shown) is mounted on the first guide shaft 71 between the side wall 701 and the side 741 of the second operating body 74 . An insertion groove 7412 for the wire W1 is formed in the side 741, and a screw hole 7430 is formed in the bent side 743. As shown in FIG. The insertion groove 7412 communicates with the grooves between the bent sides 743, and the locking portion (larger diameter than the groove width of the insertion groove 7412) for the end of the wire W1 is positioned above the bent side 743. A plate 744 is fixed to the bent sides 743 with screws 745 so as to cover the grooves between the bent sides 743 from below.

The second operating body 74 is slidable on the first guide shaft 71 and the second guide shaft 72 . At the normal position, the upper half of the side 741 of the second operating body 74 abuts the outside of the side 731 of the first operating body 73 from the left side, and the first coil spring mounted on the first guide shaft 71 One end (left end) of the first coil spring 76 contacts the inner side of the side 731 of the first operating body 73 , and the other end (right end) of the first coil spring 76 contacts the side 742 of the second operating body 74 . abutting on the inside. When the second actuator 74 in the steady position moves in the first direction, the first actuator 73 moves in the first direction via the first coil spring 76 . A manual wire (not shown) for manually releasing the brake of the opening/closing machine M may be provided on the second operating body 74 so that the second operating body 74 can be pulled in the brake releasing direction by the manual wire.

As shown in FIG. 21, the third operating body 75 has a U-shape in a side view from a base 750 that extends horizontally and side sides 751 and 752 that vertically rise from the left and right ends of the base 750 so as to face each other. Insertion holes 7510 and 7520 through which the second guide shaft 72 is inserted are formed in the left and right sides 751 and 752 . One end of a manual operation wire W4 extending from the manual closing device 10 is fixed to the right side 752 of the third operating body 75 . An insertion groove 7521 for the wire W4 is formed in the side edge 752 , and the insertion groove 7521 communicates with the groove portion 7500 of the bottom edge 750 . The end portion of the wire W4 serves as a locking portion having a diameter larger than the groove widths of the insertion groove 7521 and the groove portion 7500, thereby preventing the locking portion of the end portion of the wire W4 from coming off. A screw hole 7501 is formed in the base 750 at the center in the width direction and close to the side 732 with the groove 7500 interposed therebetween. A plate 753 is brought into contact with the bottom side 750 so as to cover the groove portion 7500 from below, and the plate 753 is fixed to the bottom side 750 with screws 754 .

The third operating body 75 is slidable on the second guide shaft 72 . A spacer 755 is provided between the side edge 752 of the third operating body 75 and the side wall 702 of the case 70 to restrict the movement of the third operating body 75 to the right. A member having a U-shaped cross section is provided at both ends of the case 70 in the width direction, and a contact piece 703 is formed from the member (see FIG. 11). The left end of the second coil spring 77 mounted on the second guide shaft 72 contacts the left side 751 of the third operating body 75 , and the right end of the second coil spring 77 contacts the contact piece 703 . is in contact with In the stationary position, the right side 752 of the third actuating body 75 abuts the spacer 755, and the left side 751 of the third actuating body 75 abuts the side 741 of the second actuating body 74. there is At this time, the third operating body 75 is pulled to the right by the wire W4, and the second coil spring 77 is in a compressed state. When the tensile force of the wire W4 is relieved by the operation from the manual closing device 10, the second coil spring 77 expands and the third operating body 75 moves to the right side. The first operating body 73 moves to the left (first direction).

The first microswitch SW1 is detection means for detecting that an obstacle has been detected when the shutter curtain 1 is electrically lowered. The first microswitch SW1 is a microswitch for detecting an obstacle, and is activated when an obstacle is detected. The contact is ON during monitoring (during normal opening and closing of the shutter), and the contact is OFF when the microswitch is activated. becomes. That is, it is assumed that the obstacle is detected when the first microswitch SW1 changes from ON to OFF while the shutter curtain 1 is electrically lowered. When the first microswitch SW1 turns from ON to OFF when the shutter curtain 1 is electrically lowered, an obstacle detection signal is input to the obstacle detection control panel 11A, and the opening/closing machine M is electrically lowered via the shutter control panel 11B. stop. In this embodiment, the first microswitch SW1 is activated by going from ON to OFF, but it will be appreciated by those skilled in the art that it can be designed to be activated from OFF to ON.

A first microswitch SW1 is provided at a predetermined position in the movement path of the first operating body 73 so as to switch from the ON state to the OFF state when the first operating body 73 in the steady position moves in the second direction by a predetermined amount. 70 (in the illustrated embodiment, near one side edge of the upper wall 700 on the side wall 702 side). In the illustrated embodiment, as shown in FIG. 19, both side edges of the upper edge 730 of the first operating body 73 on the side edge 732 side are edge portions 7300 extending parallel to the first guide shaft 71 and and a recess 7301 formed on the first direction side (the side away from the side edge 732). When the first operating body 73 is in the normal position and the brake release position, the first microswitch SW1 contacts the edge 7300 of the first operating body 73 and is in the closed posture (ON state), and the first operating body 73 is in the ON state. When the first microswitch SW1 is moved in the second direction from the normal position, the first microswitch SW1 is positioned in the concave portion 7301 of the first operating body 73 and takes the open position (OFF state).

The second microswitch SW2 is means for detecting that the automatic closing device 6 has been activated or that a manual closing operation has been performed from the manual closing device 10. FIG. The second microswitch SW2 is a microswitch for prohibiting operation, and is operated when the automatic closing device 6 is operated and when manually operated from the manual closing device 10, the contact is OFF during monitoring, and the contact is closed during operation. ON. When the second microswitch SW2 changes from OFF to ON, an operation confirmation signal is input to the obstacle detection control panel 11A. is stopped, and the push button operation is disabled. In this embodiment, the first microswitch SW1 is actuated by going from OFF to ON, but it will be understood by those skilled in the art that it can be designed to be actuated by going from ON to OFF.

A second microswitch SW2 is provided to detect the movement of the movable element of the actuating part 7 when the automatic closing device 6 is actuated and when a manual closing operation is performed from the manual closing device 10 . In the present embodiment, the second operating body 74 moves in the first direction from the steady position in both the operation of the automatic closing device 6 and the manual closing operation from the manual closing device 10. The switch SW2 is positioned on the path of movement of the second operating body 74 and is positioned on the movement path of the second operating body 74 so as to switch from the OFF state to the ON state when the second operating body 74 in the steady position moves in the first direction by a predetermined amount. installed in the part. As shown in FIG. 18, a tongue-shaped piece 704 extending perpendicularly to the upper wall 700 is formed at the center of the side edge of the upper wall 700 in the left-right direction. A microswitch SW2 is mounted. The second microswitch SW2 is located in the movement path of one end of the right side 742 of the second actuating body 74, and when the second actuating body 74 is in the steady position, the side 742 and the second microswitch SW2 are in contact with each other. The switch SW2 is spaced apart, and when the second actuator 74 in the steady position moves in the first direction, the side 742 pushes the second microswitch SW2 closed, thereby turning the second microswitch SW2 OFF. to the ON state.

[C2] Motion of Actuating Part During Electric Lowering Obstacle detection during electric lowering will be described with reference to FIGS. 12 and 13. FIG. FIG. 12 shows the posture of each element of the operating part 7 during electric opening/closing, and each element is in the normal position. The first microswitch SW1 is ON and the second microswitch SW2 is OFF. FIG. 32A shows the attitude of the rotating body 80 of the relay device 8 in the state of FIG.

FIG. 13 shows a state in which an obstacle is detected during electric descent (the state in FIG. 12). When the seat plate 4 detects an obstacle, the first wire W2 of the return wire is pulled, and the first operating body 73 compresses the first coil spring 76 and slides in the second direction from the normal position. FIG. 32B shows the attitude of the rotating body 80 of the relay device 8 in the state of FIG. It can be seen from FIG. 32B that the second wire W3 of the return wire is pulled downward from the state of FIG. The sliding movement of the first operating body 73 in the second direction turns the first microswitch SW1 from ON to OFF, and an obstacle detection signal is transmitted to the obstacle detection control panel 11A. When an obstacle detection signal is input to the obstacle detection control panel 11A, the electric lowering of the opening/closing machine M is stopped via the shutter control panel 11B (in one form, it is once raised after stopping and then stopped, that is, touch up). In FIG. 13, the second actuating body 74 and the third actuating body 75 are in the steady position, and the second microswitch SW2 is in the OFF state. In the state of FIG. 13, when the obstacle is removed, the pulling force of the first wire W2 of the return wire disappears, the second coil spring 76 expands, and the first operating body 73 moves in the first direction. 12, and the first microswitch SW1 is turned ON from OFF. FIG. 32(C) shows the attitude of the rotating body 80 of the relay device 8 when the operating part 7 returns to the state of FIG. 12, which is substantially the same as the attitude of FIG. 32(A). FIG. 13 shows a state in which the first operating body 73 is pulled to the limit position in the second direction. , the first microswitch SW1 is actuated to stop the shutter that is being electrically lowered. In the unlikely event that the return wires (first wire W2, second wire W3) are pulled to the limit position in FIG. The second wire W3, which is wound three times, slips and is pulled out, so that the operating part 7 and the relay device 8 are prevented from being damaged.

[C-3] Movement of the actuating part during self-weight descent (due to operation of the automatic closing device) Regarding self-weight descent and obstacle detection of the shutter curtain 1 due to the operation of the automatic closing device 6, referring to FIGS. 14 and 15, explain. When a fire is detected by the fire detector 6A, a signal (DC24V) is output from the disaster prevention board 6B, the automatic closing device 6 is activated, and the brake release wire W1 is pulled. When the wire W1 is pulled leftward by the automatic closing device 6 from the state of FIG. 11, the left side 741 of the second operating body 74 moves in the first direction, moves in the first direction, the first coil spring 76 (the first coil spring 76 has a larger elastic force than the return means of the brake release lever built in the opening/closing machine M). Then, the first operating body 73 in the steady position moves in the first direction to the brake release position, and the pressing piece 736 at the upper end of the left side edge 731 of the first operating body 73 comes into contact with the brake release lever. By moving this, the brake is released. FIG. 14 shows the brake released. 33A shows the posture of the rotating body 80 of the relay device 8 in the state of FIG. 11, and FIG. 33B shows the posture of the rotating body 80 of the relay device 8 in the state of FIG. It can be seen that as the first operating body 73 moves in the first direction from the normal position, the first wire W2 of the return wire is pulled downward and the rotating body 80 rotates.

11 to the position shown in FIG. 14, the second microswitch SW2 is turned ON from OFF, an operation confirmation signal is transmitted to the obstacle detection control panel 11A, and an electric opening/closing operation is performed. is invalidated, and the movement of the shutter curtain 1 is stopped when the shutter curtain 1 is electrically opened and closed. The first microswitch SW1 is in the ON state.

When the seat plate 4 at the lower end of the shutter curtain 1, which is descending under its own weight, hits an obstacle and detects the obstacle, the first wire W2 of the return wire is pulled to the right, compressing the first coil spring 76 and performing the first operation. Body 73 moves to the right. When the pressing piece 736 on the right side 731 of the first operating body 73 moves to the right, the force pressing the brake release lever ML leftward (in the direction of brake release) is released, and the brake release lever ML is released. Then, the brake and the brake release lever ML are returned by the return means built in the brake (Fig. 15). The shutter curtain, which is descending under its own weight, stops when the brake is released. At this time, only the first coil spring 76 is compressed, and the second operating body 74 and the third operating body 75 do not move. After the obstacle is removed, the return wires (the first wire W2 and the second wire W3) can be pulled out, the first coil spring 76 expands, the state shown in FIG. 14 is reached, the brake is released, and the shutter curtain 1 falls again. FIG. 33(C) shows the attitude of the rotating body 80 of the relay device 8 in the state of FIG. It can be seen from FIG. 33C that the second wire W3 of the return wire is pulled downward from the state of FIG. The state of FIG. 33(C) is the same as the stationary position and is substantially the same as that of FIG. 33(A). FIG. 33(D) shows the posture of the rotating body 80 of the relay device 8 when the operating portion 7 returns to the state shown in FIG. be. In the state of FIG. 15, the first microswitch SW1 remains ON, and the second microswitch SW2 remains ON.

When it is desired to restore the automatic closing device 6, which has once been activated by the input of the fire detection signal, to the monitoring posture, the automatic closing device restoration lever 106 is operated to pull the automatic closing device restoration wire W5 in the second direction. The actuating rod 60 moves in the second direction while compressing the coil spring 61 , and the shaft-shaped engaging portion 630 slides on the upper edge 601 of the actuating rod 60 to engage with the engaged groove 600 . By stopping, the latch 63 assumes the first posture and the microswitch MS is turned ON to enter the standby state shown in the lower diagram of FIG. state or stationary position.

[C-4] Movement of the actuating part when its own weight is lowered (due to manual closing operation from the manual closing device) See FIGS. Description will be made with reference to this. When it is desired to close at any time, pressing the emergency closing switch 103 on the second cover 102 of the second operation box 10B pulls the side 752 of the third operating body 75 to the right in the drawing from the state shown in FIG. The wire W4 that maintains the second coil spring 77 in the compressed state is loosened from the tension state, and the compressed second coil spring 77 expands, so that the left end of the coil spring 77 moves to the left and the second coil spring 77 expands. The side wall 751 of the third operating body 75 is pushed leftward in the drawing, and the third operating body 75 moves leftward. The sidewall 741 of the second operating body 74 is pushed leftward by the side wall 751 pushed leftward, and the second operating body 74 moves leftward. The right side 742 of the second operating body 74 abuts the right end of the first coil spring 76 from the right side, and the movement of the side 742 of the second operating body 74 to the right causes the first coil spring 76 to move. , the side 731 of the first operating body 73 is pushed leftward, and the pressing piece 736 of the side 731 moves the brake release lever ML leftward (first direction) to release the brake ( Figure 16). At this time, since the total elastic force of the two first coil springs 76 is greater than the biasing force of the brake release lever ML (returning force provided by the return means built in the opening/closing machine M), the first coil spring In this state, 76 overcomes the urging force of the brake release lever ML and moves to the left to move the brake release lever ML to release the brake. By releasing the brake, the shutter curtain 1 starts falling under its own weight. 33A shows the posture of the rotating body 80 of the relay device 8 in the state of FIG. 11, and FIG. 33B shows the posture of the rotating body 80 of the relay device 8 in the state of FIG. It can be seen that as the first operating body 73 moves in the first direction from the normal position, the first wire W2 of the return wire is pulled downward and the rotating body 80 rotates.

When the second operating body 74 moves from the normal position shown in FIG. 11 to the position shown in FIG. 16 in accordance with the movement of the third operating body 75 in the first direction, the second microswitch SW2 turns from OFF to ON, and the obstacle is blocked. An operation confirmation signal is sent to the detection control panel 11A, the push button operation from the manual operation section is disabled, and the movement of the shutter curtain 1 is stopped if it is electrically opened or closed. The first microswitch SW1 is in the ON state.

When the seat plate 4 at the lower end of the shutter curtain 1, which is descending under its own weight, hits an obstacle and detects the obstacle, the wire W2 is pulled to the right, compressing the first coil spring 76 and moving the first operating body 73 to the right. Moving. When the pressing piece 736 on the right side 731 of the first operating body 73 moves rightward, the force pressing the brake release lever ML leftward (in the direction of brake release) is released, and the brake release lever ML becomes free. , the brake and the brake release lever ML are returned by the return means (spring member) incorporated in the brake (FIG. 17). The shutter curtain, which is descending under its own weight, stops when the brake is released. At this time, only the first coil spring 76 is compressed, and the second operating body 74 and the third operating body 75 do not move. After the obstacle is removed, the return wires (the first wire W2 and the second wire W3) can be pulled out, the first coil spring 76 expands, the state shown in FIG. 16 is reached, the brake is released, and the shutter curtain 1 falls again. FIG. 33(C) shows the attitude of the rotating body 80 of the relay device 8 in the state of FIG. It can be seen from FIG. 33C that the second wire W3 of the return wire is pulled downward from the state of FIG. The state of FIG. 33(C) is the same as the stationary position and is substantially the same as that of FIG. 33(A). FIG. 33(D) shows the attitude of the rotating body 80 of the relay device 8 when the operating part 7 returns to the state shown in FIG. be. In the state of FIG. 17, the first microswitch SW1 remains ON, and the second microswitch SW2 remains ON.

When it is desired to manually stop the shutter curtain that has been manually lowered by its own weight, the wire W4 connected to the third operating body 75 is moved to the right by pulling the rotating lever 104 of the second operation box 10B. Being pulled, the third operating body 75 moves rightward while compressing the second coil spring 77 . In the state of FIG. 16, the extension force of the second coil spring 77 that overcomes the return means (spring member) that moves the brake release lever ML in the return direction and holds the brake release lever ML in the brake release position is released. , the brake release lever ML is moved to the right side together with the first operating body 73 and the second operating body 74 by the force of the return means on the opening/closing machine side, and the brake and the brake release lever ML are returned (in detail, In FIG. 11, the brake release lever ML and the pressing piece 736 are returned to the state of light contact). The shutter curtain, which is descending under its own weight, stops when the brake is released. In this way, the brake release lever ML returns to the position of FIG.

In the present embodiment, in detecting an obstacle during the descent of its own weight, the first operating body 73 in the brake return position moves in the second direction to reach the steady position, thereby returning the brake release lever ML to the opening/closing machine. The M brake is designed to return. Here, it is conceivable that the first operating body 73 may move beyond the steady position and further move in the second direction before the brake is restored due to aged deterioration, adjustment error, or the like. At this time, the movement of the first actuator 73 in the second direction switches the first microswitch SW1 from ON to OFF. Here, by inputting the obstacle detection signal to the obstacle detection control panel 11A even when the dead weight is falling, the shutter curtain 1 during the dead weight falling can be detected when the commercial power supply is effective. It can be electrically controlled and stopped after an obstacle is detected.

[D] Control Unit In the electric shutter with a mechanical safety device according to the present invention, different controls are performed in the electric opening/closing mode (normal mode) and the dead weight descent mode (fire mode). During normal electric opening and closing, operation control of the shutter curtain 1 is performed in the normal mode. When a fire detection signal is input to the automatic closing device 6 or when the weight is lowered by a manual closing operation, the control mode changes from the normal mode to the weight lowering mode, and the operation control of the shutter curtain 1 is performed in the weight lowering mode. In this embodiment, the control unit is composed of an obstacle detection control panel 11A and a shutter control panel 11B. A detailed description will be given below.

[D-1] Electric Opening/Closing Mode In the normal mode, the shutter curtain 1 is electrically opened/closed by pressing the opening/closing operation switch 100 . More specifically, when the opening switch U is pressed while the opening is fully closed or half open, a signal is sent to the shutter control panel 11B via the obstacle detection control panel 11A, and the opening/closing machine M operates to start the winding. The take-up shaft 2 is rotated in the first direction to raise the shutter curtain 1 while winding it up (FIG. 37(1)). The second wire W3 is wound around the winding drum 91 when the shutter curtain 1 is raised. When the shutter curtain 1 rises to a preset upper limit position, the upper limit switch is actuated to stop the operation of the opener M, the rotation of the winding shaft 2 is stopped, and the winding of the shutter curtain 1 is stopped. In the unlikely event that the shutter curtain 1 does not stop at the upper limit due to a failure of the limit switch LS or the like, the emergency switch 18 is actuated to stop the shutter curtain 1 from being lifted by the opening/closing machine M.

When the closing switch D is pressed while the opening is fully open or half-open, a signal is sent to the shutter control panel 11B via the obstacle detection control panel 11A, and the opener M operates to move the winding shaft 2 to the second position. direction to lower the shutter curtain 1 (FIG. 37(2)). When the shutter curtain 1 is lowered, the second wire W3 is pulled out from the winding drum 91 while extending along the surface portion of the shutter curtain 1 . When the lower plate 41 at the lower end of the lowering shutter curtain 1 hits an obstacle, the lower plate 41 moves upward relative to the upper plate 40, and the locking device 9 restricts the withdrawal of the second wire W3. , the upper seat plate 40 moves downward with respect to the lower seat plate 41, thereby pulling the second wire W3, whose withdrawal is restricted, and pulling the first wire W2 through the relay device 8, thereby moving the first operating body. 73 moves from the normal position in the second direction (to the right in the drawing), the first microswitch SW1 is turned from ON to OFF, and an obstacle detection signal (seat plate actuation signal) is transmitted to the obstacle detection control panel 11A. be. Upon receiving the obstacle detection signal, the obstacle detection control panel 11A stops the operation of the opening/closing machine M for a predetermined time (for example, 1 second) via the shutter control panel 11B, and then operates the opening/closing machine M to close the shutter curtain. 1 is raised for a predetermined time (for example, 1.5 seconds) (touch-up), and then stopped (((3) in FIG. 37)). After that, by pressing the closing switch D of the opening/closing operation switch 100, the shutter curtain 1 can be electrically lowered again.

When the lower plate 41 at the lower end of the shutter curtain 1 that is electrically lowered lands on the floor, the lower plate 41 moves upward relative to the upper plate 40, and the lock device 9 restricts the withdrawal of the second wire W3. As the upper seat plate 40 moves downward with respect to the lower seat plate 41, the second wire W3 whose withdrawal is restricted is pulled, the first wire W2 is pulled via the relay device 8, and the first operating body 73 is pulled. moves from the normal position in the second direction (right side in the figure), the first microswitch SW1 is turned off from ON, and an obstacle detection signal is sent to the obstacle detection control panel 11A. Upon receiving the obstacle detection signal, the obstacle detection control panel 11A stops the operation of the opening/closing machine M via the shutter control panel 11B to stop the shutter curtain 1 from falling ((2) in FIG. 37). A timer is activated when the shutter curtain 1 is lowered to a preset lower limit position during the electric descent, and touch-up is not performed when an obstacle detection signal is output during timer operation. If no obstacle detection signal is output during timer operation, the operation of the opening/closing machine M is stopped via the obstacle detection control panel 11A and the shutter control panel 11B at the end of the timer, and the rotation of the winding shaft 2 is stopped. to stop. In particular, when the sensitive setting is made such that the first microswitch SW1 operates when the first operating body 73 moves slightly, the weight of the second wire W3, the friction between the second wire W3 and the lock drum 90, Due to the force of the spiral spring inside the winding drum 91, the inertia of each device, etc., the second wire W3 is momentarily pulled down at the start of the electric descent, and the first operating body 73 moves in the second direction. It is also conceivable that the first microswitch SW1 operates at the same time. Therefore, the control device has a function to prevent control such as stopping when the first microswitch SW1 is operated within a certain period of time immediately after the start of the electric descent. In order to prevent malfunctions such as ignoring obstacles when re-descent, a function is provided to extend the operation time of reversing up after detecting obstacles and temporarily stopping. It is selectable.

[D-2] Self-weight descent mode When the automatic closing device 6 is activated by the input of the fire detection signal from the disaster prevention board 6B, the wire W1 is pulled so that the second operating body 74 moves from the steady position in the first direction (in the figure left), and with movement of the second actuation body 74 in the first direction, the first actuation body 73 moves in the first direction to release the brake. Further, when the tension of the wire W4 is relaxed by pressing the emergency closing switch 103 of the second operation box 10B, the third operating body 75 moves from the normal position in the first direction (left side in the drawing), Along with the movement of the third operating body 75 in the first direction, the second operating body 74 and the first operating body 73 move in the first direction to release the brake. When the second microswitch SW2 turns from OFF to ON by moving the second operating body 74 in the first direction from the normal position, the operating unit 7 continuously outputs an operation confirmation signal to the obstacle detection control panel 11A. When the obstacle detection control panel 11A receives the operation confirmation signal, it changes from the electric opening/closing mode (normal mode) to the dead weight descent mode (fire mode). When the obstacle detection control panel 11A enters the self-weight lowering mode, the electric opening/closing operation (push button operation for electric opening/closing) from the opening switch U, the closing switch D, and the stop switch S of the opening/closing operation switch 100 is disabled. .

When the lower plate 41 of the lower end of the shutter curtain 1 that is falling under its own weight hits an obstacle, the lower plate 41 moves upward relative to the upper plate 40, and the locking device 9 restricts the withdrawal of the second wire W3. When the upper seat plate 40 moves downward with respect to the lower seat plate 41, the second wire W3 whose withdrawal is restricted is pulled, and the first wire W2 is pulled via the relay device 8, and the brake release position is reached. The first operating body 73 that has moved to the normal position moves in the second direction toward the normal position, the brake of the opening/closing machine M is restored, and the shutter curtain 1 that is falling under its own weight stops. When the obstacle is removed, the lower seat plate 41, which has been moved upward, can be moved downward. After moving to the release position, the brake of the opening/closing machine M is released by the brake release lever ML, and the shutter curtain 1 descends again under its own weight ((3) in FIG. 38). When the lower seat plate 41 of the lower end of the shutter curtain 1 which is being lowered by its own weight lands on the floor, the lower seat plate 41 moves upward relative to the upper seat plate 40, and the locking device 9 restricts the withdrawal of the second wire W3. , the upper seat plate 40 moves downward with respect to the lower seat plate 41, thereby pulling the second wire W3, whose withdrawal is restricted, and pulling the first wire W2 through the relay device 8, thereby moving the first operating body. 73 moves from the brake release position to the steady position and the brake is restored. The brake of the opening/closing machine M is restored, and the shutter curtain 1, which is falling under its own weight, stops and becomes fully closed (Fig. 38 (3)).

If the first operating body 73 moves further in the second direction beyond the normal position before the brake is restored due to aged deterioration or adjustment error, the first microswitch SW1 will turn from ON to OFF. Then, an obstacle detection signal is sent to the obstacle detection control panel 11A (an obstacle detection signal is not sent during a power failure). At this time, if the energization is effective during the self-weight descent, the obstacle detection control panel 11A that has received the obstacle detection signal operates the opening/closing machine M via the shutter control panel 11B to open the shutter curtain 1. , or may be stopped after rising for a predetermined time (for example, 1.5 seconds) from the reception of the obstacle detection signal (dotted line in FIG. 38(3)).
In addition, the dead weight descent mode (by restoring the automatic closing device 6 if only the automatic closing device 6 is operating or if both the automatic closing device 6 and the manual closing device are operating, and only the manual closing device When the manual closing device is operated, the second operating body 74 of the operating part 7 returns to the normal position, the second microswitch SW2 changes from ON to OFF, and the mode changes to the electric opening/closing mode. However, a dedicated mode return switch is provided in the operation box 10 (the first operation box 10A or the second operation box 10B) for returning from the gravity descent mode to the electric opening/closing mode, and operation of the switch returns. You can make it work.

When the automatic closing device 6 operates to release the brake while the shutter curtain is electrically raised, the second operating body 74 and the first operating body 73 in the normal position move in the first direction, and the second microswitch SW2 is activated. is turned from OFF to ON, and the second microswitch SW2 is turned ON, an operation confirmation signal is input to the obstacle detection control panel 11A, and the obstacle detection control panel 11A shifts from the electric opening/closing mode (normal mode) to its own weight drop. At the same time as the mode (fire mode) is input, the opening/closing machine M is stopped via the shutter control panel 11B at the same time as the operation confirmation signal is input, and the shutter curtain starts its own weight descent (FIG. 38(1)). When the automatic closing device 6 operates to release the brake while the shutter curtain is electrically lowered, the second operating body 74 and the first operating body 73 in the normal position move in the first direction, and the second microswitch SW2 is closed. When the second microswitch SW2 is turned ON, an operation confirmation signal is input to the obstacle detection control panel 11A, and the obstacle detection control panel 11A shifts from the electric opening/closing mode (normal mode) to the dead weight descent mode. (fire mode), simultaneously with the input of the operation confirmation signal, the drive of the opener M is stopped via the shutter control panel 11B, and the shutter curtain starts its own weight descent ((2) in FIG. 38).

[E] Structure of seat plate The structure of the seat plate 4 provided with the obstacle detection means will be described. The seat plate 4 provided at the lower end of the shutter curtain consists of an upper seat plate 40 and a lower seat plate 41 that can move upward relative to the upper seat plate 40 . In this embodiment, the upper seat plate 40 includes an upper surface portion 400, left and right side portions 401 hanging down from both ends of the upper surface portion 400 in the width direction, and covers horizontally extending from the lower ends of the left and right side portions 401 in directions approaching each other. The horizontal contact pieces 411 on the left and right of the upper end of the lower seat plate 41 are placed on the contacted pieces 402 of the upper seat plate 40 , so that the lower seat plate is attached to the upper seat plate 40 . 41 is suspended (see FIGS. 41 and 43). In the posture where the lower seat plate 41 is moved up to the upper limit position with respect to the upper seat plate 40, the horizontal portion 414 of the lower seat plate 41 abuts on the contact piece 402 of the upper seat plate 40 from below (see FIG. 44).

As shown in FIGS. 39, 43, and 44, a plurality of detection levers 42 are spaced apart in the longitudinal direction of the seat plate 4 between the upper seat plate 40 and the lower seat plate 41 that constitute the seat plate 4. The shutter curtain 1 is rotatable around a fulcrum 421, and the lower end of the shutter curtain 1 during the electric descent or the self-weight descent comes into contact with an obstacle, causing the lower plate 41 to move against the upper plate 40. When the lower seat plate 41 moves upward relatively, the detection lever 42 rotates in conjunction with the upward movement. A plurality of detection levers 42 are connected to each other by wires 43, and one end of the wires 43 is connected via a coil spring 98 to the lower end side of a first rotating lever 92 (to be described later) that constitutes the locking mechanism of the locking device 9. It is When the lower seat plate 41 moves upward relative to the upper seat plate 40, the detection lever 42 rotates in such a direction that the lower end of the detection lever 42 moves away from the lock drum 90 of the lock device 9, and the wire 43 moves toward the lock device. 9 is pulled away from the lock drum 90 .

When the wire 43 is pulled and the first rotating lever 92 rotates, the rotation of the lock drum 90 is regulated by the lock mechanism (details of which will be described later) of the lock device 9, and the lock device 9 is rotated while the shutter curtain 1 is being lowered. The pulling out of the second wire W3 pulled out from the shutter curtain 1 stops, and furthermore, the second wire W3 is pulled downward by lowering the shutter curtain 1, and the first wire W2 is pulled through the relay device 8. , the first operating body 73 moves to the brake return position, the pressure of the brake release lever ML is released, the brake is returned by the return means built in the brake of the opening/closing machine M, and the shutter curtain 1 is lowered. Stop.

It should be noted that the configuration of the obstacle detection means of the seat plate 4 described above is one embodiment and does not limit the scope of the present invention. For example, the obstacle detection means detects the upward movement of the lower seat plate 41 using a detection body rotatably provided between the upper seat plate 40 and the lower seat plate 41 that constitute the seat plate 4 . The shape and number of the detecting bodies are not limited to those shown in the drawings, and the wire 43 may not be used (for example, the detecting body may be a rotating body extending in the lengthwise direction of the seat plate).

[F] Lock Device The structure of the lock device 9 will be described in detail with reference to FIGS. 26 to 30. FIG. 26 and FIGS. 27 to 30 have different shapes of elements, but the constituent elements themselves are the same. Also, reference numerals for each element are described in the most detail in FIG. 27 and should be referred to accordingly. The lock device 9 includes a rotatable lock drum 90, a rotatable winding drum 91, a first rotating lever 92, a second rotating lever 93, and a third rotating lever 94, which are installed therein. A case 95 is provided. In this embodiment, the lock drum 90 is positioned directly below the relay device 8, the winding drum 91 is arranged adjacent to the first side of the lock drum 90, and the first rotating lever 92 and , a second pivot lever 93 and a third pivot lever 94 are arranged adjacent to the second side of the lock drum 90 . Normally, the first rotating lever 92, the second rotating lever 93, and the third rotating lever 94 are in the first posture (unlocked posture) (see FIGS. 26 and 30). When the shutter is stopped by detecting an obstacle, the first rotating lever 92, the second rotating lever 93, and the third rotating lever 94 are in the second posture (locked posture) (see FIG. 27), and the second While the moving lever 93 maintains the second posture, the locked state of the locking device 9 is maintained even if the first rotating lever 92 starts rotating (see FIGS. 28 and 29).

The case 95 includes an upper plate 950, left and right side plates 951 and 952, a rear plate 953, and a detachable front cover 954 (see FIG. 4), and has an open bottom surface. The upper plate 950 is formed with a guide 9500 through which the second wire W3 is inserted. As shown in FIG. 26, a front plate 954' is provided on the front side of the lock drum 90 and the winding drum 91 so as to face the rear plate 953 with the lock drum 90 and the winding drum 91 interposed therebetween. The front plate 954' extends to cover at least the front sides of the lock drum 90 and the center portions of the winding drum 91 (the portions corresponding to the support shafts 900 and 910). In the illustrated embodiment, the front plate 954' is integrally formed with bent pieces on the upper side and the right side. Fixed. One end of the support shaft 900 and the support shaft 910 is supported by the rear plate 953 and the other end is supported by the front plate 954'. By supporting the support shaft 900 and the support shaft 910 at both ends, the lock drum 90 and the winding drum 91 can be rotationally supported more stably than cantilever support. In the embodiment shown in FIG. 26, a guide portion 958 through which the wire W3 extending between the lock drum 90 and the winding drum 91 is inserted is formed at the bent portion at the lower end of the front plate 954'. Although not shown in FIGS. 26 and 27, a front cover 954 is further provided on the front surface of the case 95 . The lower ends of the side pieces 951 and 952 are folded outward to form bent pieces 956 and 957, respectively. It is attached to the upper surface portion 400 of the plate 40 . Since the case 95 is attached to the upper plate 40 using the screws 956A and 957A exposed to the outside, the case 95 can be easily removed during maintenance.

The lock drum 90 includes a support shaft 900 that rotatably supports the lock drum 90, a concave peripheral surface 901 around which a wire is wound, and a peripheral edge of the lock drum 90 (specifically, a thickness direction of the peripheral surface 901). A large number of tooth-like locked portions 903 are provided on one side and are continuously formed on the peripheral edge of a disk portion 902 having a diameter larger than that of the peripheral surface 901. The lock drum 90 In one embodiment, the thickness of the peripheral surface 901 is sized to allow three parallel windings of the wire.

The winding drum 91 includes a support shaft 910 that rotatably supports the winding drum 91, a peripheral surface 911 on which the wire is wound, and a means for urging the winding drum 91 in the wire winding direction. a spiral spring (not shown);

The first rotating lever 92 is a vertically extending rotating piece, and is composed of an upper first portion 920 and a second portion 921 extending downward at a slight angle to the first portion 920 . It rotates around a rotation fulcrum 922 (formed by a support shaft P1 protruding from the rear plate 953 of the case 95) formed at the connecting portion between the first portion 920 and the second portion 921. It is movably mounted on the case 95 .

The first rotating lever 92 rotates around a rotating fulcrum 922 so that the upper first portion 920 approaches the lock drum 90 in a first direction (locking direction), and the upper first portion 920 moves toward the lock drum 90 . It is rotatable in a second direction (unlocking direction) away from the . During normal opening/closing and stopping, the first rotating lever 92 is in the first posture in which the upper first portion 920 is rotated away from the lock drum 90 (see FIGS. 26 and 30), and is locked. When the device 9 is in the locked state, the first rotating lever 92 is in the second posture in which the upper first portion 920 is rotated toward the lock drum 90 (see FIG. 27).

The first rotating lever 92 is biased in the second direction by a coil spring 96 illustrated as biasing means. In the illustrated embodiment, one end of the coil spring 96 is connected to a pin P2 projecting from the rear plate 953 of the case 95 near the lower end of the left side plate 951 of the case 95, and the other end is connected to the first rotating lever. The upper end of the first portion 920 of 92 is connected to the side away from the lock drum 90 . A pin P3 as a stopper protrudes from a predetermined portion of the rear plate 953 of the case 95. When the first rotating lever 92 is in the first posture, the first portion 920 of the first rotating lever 92 does not move. A portion on the side away from the lock drum 90 is in contact with the pin P3.

The lower side of the second portion 921 of the first rotating lever 92 extends downward from the lower end of the case 95, and the lower end is formed with a hook-shaped locking portion 92A (see FIG. 26). The end of the wire 43 (the end of the coil spring 98 when the end of the wire 43 is connected to the coil spring 98 (see FIGS. 39 and 40)) is detachably locked to the locking portion 92A. It is When pulled by the wire 43 in conjunction with the upward movement of the lower seat plate 41, the first rotating lever 92 overcomes the biasing force of the coil spring 96 and rotates in the first direction. The engaging portion 92A includes an opening formed on the lower end side of the first rotating lever 92 on the side opposite to the side where the wire 43 extends, a groove portion extending downward from the opening, and a groove portion opposite to the side where the wire 43 extends. The bottom of the groove bulges slightly toward the wire 43, and the upper end of the rising portion is formed thick adjacent to the opening. The locking portion 92A is shaped to prevent the wire 43 from coming off the locking portion 92A regardless of the rotational position of the first rotating lever 92 during operation of the mechanical safety device. It is This is advantageous because the end of the wire 43 can be removed from the engaging portion 92A during maintenance or the like.

The second rotating lever 93 is an isosceles triangular rotating piece having short sides 930 and 931 and a long side 932 . Provided on the case 95 so as to be rotatable around a pivot point 933 (formed by a support shaft P1 projecting from the rear plate 953 of the case 95) formed close to the vertex located on the lower side. be. In the illustrated embodiment, the pivot point 933 of the second pivot lever 93 and the pivot point 922 of the first pivot lever 92 are formed from a common support shaft P1. A locking portion 934 is formed near the vertex formed by the short sides 930 and 931, and a contact portion 935 is formed near the long side 932 so as to be spaced apart from the locking portion 934, A contact portion 936 is formed in the vicinity of the vertex formed by the short side 930 and the long side 932 . The engaging portion 934 of the second rotating lever 93 has a shape that can be engaged with and disengaged from the engaged portion 903 (tooth of the gear) of the lock drum 90 .

In this embodiment, the second rotating lever 93 has two plates facing each other, the support shaft P1 is provided through the two plates, and the locking portion 934 connects the two plates. The contact portion 935 is a pin that connects the two plates, and the contact portion 936 is a pin that connects the two plates and is rotatably mounted on the pin. It's a bearing. It should be noted that the configuration consisting of two plates is only one aspect of the second rotating lever 93 .

The second rotating lever 93 is rotatable in a first direction in which the upper side approaches the lock drum 90 and in a second direction in which the upper side separates from the lock drum 90 about a lower rotating fulcrum 933 . It has become. During normal opening/closing and stopping, the second rotating lever 93 is in the first posture in which the upper side is rotated away from the lock drum 90 (see FIGS. 26 and 30), and the locking device 9 is in the locked state. 27, the second rotating lever 93 is in the second posture in which the upper side is rotated toward the side close to the lock drum 90 (see FIG. 27). When the second rotating lever 93 is in the first posture, the locking portion 934 is in the unlocked state away from the locked portion 903 of the lock drum 90, and the contact portion 935 has the first A portion of the first portion 920 of the rotating lever 92 on the side closer to the locking device is in contact. When the second rotating lever 93 is in the second posture, the locking portion 934 is locked to the locked portion 903 of the lock drum 90 . When the locking portion 934 of the second rotating lever 93 and the locked portion 903 of the lock drum 90 are in the locked state, the rotation of the lock drum 90 is restricted and the withdrawal of the wire W3 of the lock device 9 is restricted. locked.

The second rotating lever 93 is biased in the second direction by a coil spring 97 exemplified as biasing means. In the illustrated embodiment, one end of the coil spring 97 is connected to a pin P2 projecting from the rear plate 953 of the case 95 near the lower end of the left side plate 951 of the case 95, and the other end is connected to the second rotating lever. 93 is connected to the contact portion 935 . In the illustrated embodiment, the coil spring 97 that biases the second rotating lever 93 in the second direction and the coil spring 96 that biases the first rotating lever 92 in the second direction are connected to a common pin P2. However, separate pins may be prepared and connected to the separate pins. Further, in the illustrated embodiment, the pin forming the contact portion 935 also serves as the connecting portion of the other end of the coil spring 97. However, as shown in FIG. The other end of the coil spring 97 may be connected to the piece 935').

A portion of the upper first portion 920 of the first rotating lever 92 on the side closer to the lock drum 90 is in contact with the contact portion 935 of the second rotating lever 93 . When the wire 43 is pulled in conjunction with the upward movement of the lower seat plate 41 and the first rotating lever 92 overcomes the biasing force of the coil spring 96 and rotates in the first direction, the first rotating lever 92 rotates in the first direction. When the first portion 920 presses the contact portion 935 of the second rotating lever 93, the second rotating lever 93 overcomes the biasing force of the coil spring 97 and rotates in the first direction. By rotating the second rotating lever 93 in the first direction, the locking portion 934 of the second rotating lever 93 that is separated from the locked portion 903 of the lock drum 90 is moved to the lock drum 90 . It is locked by the locked portion 903 .

The third rotating lever 94 is a member positioned above the first rotating lever 92 and the second rotating lever 93 and extending in the horizontal direction. It is a rotation restricting means for restricting rotation of the lever 93 in the second direction, in other words, a holding lever for retaining the locked state of the second rotating lever 93 for a predetermined time after the obstacle is removed. The third rotating lever 94 is rotatably provided on the case 95 with the end closer to the lock drum 90 serving as a rotation fulcrum 940, and the end farther from the lock drum 90 vertically rotating. It is possible. The pivot point 940 is formed from a support shaft P4 projecting from the rear plate 953 of the case 95 .

When the first rotating lever 92 and the second rotating lever 93 are in the first posture, the tip of the third rotating lever 94, which is the end on the far side from the lock drum 90, is at the first position (upper side). 26), and when the first rotating lever 92 and the second rotating lever 93 are in the second posture, the tip is rotated to the second position (lower side). It is in the moved second posture (see FIG. 27).

When the locking device 9 is in the locked state, that is, the first rotating lever 92, the second rotating lever 93, and the third rotating lever 94 are positioned below the laterally extending third rotating lever 94. An engaging portion 941 is formed to engage with the contact portion 936 of the second rotating lever 93 when in the second posture. A contact portion 942 is formed on the lower portion of the third rotating lever 94 so as to be positioned on the distal end side with respect to the locking portion 941 .

In this embodiment, the third rotating lever 94 is provided with two plates facing each other, the support shaft P4 is penetrating between the two plates, and the locking portion 941 is between the tips of the two plates. The contact portion 942 is a bearing rotatably mounted on a pin that connects the two plates. The configuration consisting of two plates is merely one aspect of the third rotating lever 94, and the engaging portion 941 may be integrally formed. In the illustrated embodiment, the engaging portion 941 has a stepped shape when viewed from the side, but the shape of the engaging portion 941 is not limited, and may be claw-like or projecting.

When the first rotating lever 92, the second rotating lever 93, and the third rotating lever 94 are in the first posture, the corner of the engaging portion 941 of the third rotating lever 94 is positioned at the second rotating lever 93. The tip of the third rotating lever 94 is restricted from rotating downward, and is held in the first posture. From this state, by rotating the second rotating lever 93 in the first direction, the contact portion 936 of the second rotating lever 93 climbs over the corner portion of the locking portion 941 of the third rotating lever 94. At the same time, the third rotating lever 94 rotates downward, and the contact portion 936 of the second rotating lever 93 engages the locking portion 941 .

As shown in FIG. 27, when the first rotating lever 92, the second rotating lever 93, and the third rotating lever 94 are in the second posture, the contact portion 936 of the second rotating lever 93 is in the third position. It faces the locking side 9410 of the locking portion 941 of the rotating lever 94 , and the contacting portion 923 formed at the upper end of the first rotating lever 92 contacts the contacting portion 942 of the third rotating lever 94 . is in contact with The contacting state between the contacting portion 923 of the first rotating lever 92 and the contacting portion 942 of the third rotating lever 94 and the locking of the contacting portion 936 of the second rotating lever 93 and the third rotating lever 94 The facing state (see FIG. 27) or the locked state (see FIG. 28) of the portion 941 with the locking side 9410 is at least when the first turning lever 92 is rotated in the second direction from the second posture by a predetermined amount. maintained as long as When the third rotating lever 94 in the second posture rotates upward by a predetermined amount, the locking portion 941 of the third rotating lever 94 and the contact portion 936 of the second rotating lever 93 are locked. is released, the rotation restriction by the third rotating lever 94 is released, and the force of the coil spring 97 rotates the second rotating lever 93 in the second posture in the second direction.

A circumferential projecting piece 943 is formed on the tip side of the third turning lever 94, and when the third turning lever 94 is in the first posture, the projecting piece 943 contacts the left side piece 951. Further upward rotation of the third rotating lever 94 is restricted. This prevents the third rotating lever 94 from jumping up when it rotates from the second posture to the first posture.

The action of the locking device will be described. When the shutter curtain 1 starts to descend, the locking device 9 (the locking drum 90 and the winding drum 91) provided on the seat plate 4 also descends as the seat plate 4 descends, and as the locking device 9 descends, Overcoming the force of the spiral spring, the second wire W3 is pulled out along the surface portion of the shutter curtain 1 by the downward distance of the shutter curtain 1 while the winding drum 91 and the lock drum 90 rotate.

When the seat plate 4 at the lower end of the shutter curtain 1 that is descending comes into contact with an obstacle, the lock device 9 is interlocked with the upward movement of the lower seat plate 41 relative to the upper seat plate 40 to move the lock drum. It operates so that the rotation of 90 is restricted. When the lower end of the shutter curtain 1, which is falling under its own weight, contacts an obstacle and the lower seat plate 41 moves upward relative to the upper seat plate 40, the detection lever 42 moves in conjunction with the upward movement of the lower seat plate 41. It is designed to rotate. Lower end portions of the plurality of detection levers 42 are connected to each other by wires 43 , and one end of the wires 43 is connected to the first rotating lever 92 via a coil spring 98 . When the lower seat plate 41 moves upward relative to the upper seat plate 40, the detection lever 42 rotates in the direction away from the lock drum 90, pulls the wire 43 in the direction away from the lock drum 90, and The rotating lever 92 rotates from the first posture to the second posture.

When the first rotating lever 92 rotates in the first direction from the first posture shown in FIG. By pressing while touching, the second rotating lever 93 in the first posture rotates together with the first rotating lever 92 in the first direction, and the engaging portion 934 of the second rotating lever 93 rotates. engages with the tooth-like engaging portion 903 of the lock drum 90 to restrict the rotation of the lock drum 90 (FIG. 27).

On the other hand, as shown in FIG. 26, the third rotating lever 94 in the first posture contacts the contact portion 936 of the second rotating lever 93 in the first posture, thereby moving downward. Rotation is restricted. When the second rotating lever 93 in the first posture rotates together with the first rotating lever 92 in the first direction, the contact portion 936 of the second rotating lever 93 moves toward the third rotating lever 94 . At the same time as the corner portion of the locking portion 941 is overcome and locked to the locking portion 941, the third rotating lever 94 is rotated downward by its own weight to assume the second posture (FIG. 27).

When the first rotating lever 92 , the second rotating lever 93 , and the third rotating lever 94 are in the second posture, the first rotating lever 92 is held in the second posture by the pulling force of the wire 43 . The second posture of the second rotating lever 93 is held by contacting the contact portion 935 of the second rotating lever 93 with the first portion 920 of the first rotating lever 92 in the second posture. , the second posture of the third rotating lever 94 is held by contacting the contacting portion 923 of the first rotating lever 92 with the contacting portion 942 of the third rotating lever 94 . Therefore, when the wire 43 is pulled, that is, when the obstacle is detected, the first rotating lever 92, the second rotating lever 93, and the third rotating lever 94 maintain the second position and are locked. The rotation of the lock drum 90 is restricted when the device 9 is in the locked state.

When the rotation of the lock drum 90 stops, the withdrawal of the second wire W3 is restricted and the length of the second wire W3 becomes constant. Then, the first wire W2 is pulled via the second wire W3 and the relay device 8, and the first operating body 73 slides in the second direction. During the electric descent, the first operating body 73 in the steady position moves in the second direction, the first microswitch SW1 turns from ON to OFF, and the obstacle detection signal (seat plate actuation signal) detects the obstacle. The obstacle detection control panel 11A and the shutter control panel 11B that have received the obstacle detection signal sent to the control panel 11A stop driving the opener M, and the shutter curtain 1 stops falling. When the dead weight is being lowered, the first operating body 73 in the brake release position moves to the normal position (brake return position), so that the brake release lever ML returns and the brake returns, and the winding shaft 2 is released. The rotation is regulated and the shutter curtain 1 stops descending.

Here, it is necessary to pull the return wires (the first wire W2 and the second wire W3) by a predetermined amount for the brake return (that is, the shutter curtain 1 must be lowered by a predetermined amount), and the obstacle is hit. It is desirable that the lower seat plate 41 has an upward movement stroke corresponding to the amount of descent of the shutter curtain 1 that is sufficient for braking return. Furthermore, in addition to this upward movement stroke, it is desirable that the lower seat plate 41 has a marginal stroke that allows it to move upward relative to the upper seat plate 40 . When an obstacle comes into contact with the lower seat plate 41, this extra stroke allows only the load of the lower seat plate 41 to act on the obstacle, thereby preventing the load of the entire shutter curtain from acting on the obstacle. . Here, although it is known that the seat plate 4 is composed of the lower seat plate 41 that moves upward relative to the upper seat plate 40 , in the present embodiment, the movable distance of the lower seat plate 41 with respect to the upper seat plate 40 is is larger than the conventional movable distance. Specifically, the possible relative distance of the lower seat plate 41 to the upper seat plate 40 is determined by rotating the detection lever 42 when the lower seat plate 41 at the lower end of the shutter curtain 1, which is falling under its own weight, hits an obstacle. A first movement amount (for locking) until the two-rotating lever 93 is engaged with the lock drum 90 to restrict the rotation of the lock drum 90 and restrict the withdrawal of the return wire stored in the winding drum 91. and the upper seat plate 40 moves downward relative to the lower seat plate 41 while the withdrawal of the return wire is restricted. As a result, the shutter curtain 1 stops descending due to the second moving distance until the brake is restored by pulling the return wire whose withdrawal is restricted downward (the return wire must be pulled downward after locking) and the brake return. and a third amount of movement that later allows upward movement of the lower seat plate 41 relative to the upper seat plate 40 (relieving the load that would act on the obstacle). In relation to pulling the return wire, even if the upward movement stroke of the lower plate 41 is small, it is possible to operate with the return wire (for example, the relay device 8) or the return wire (first wire W2). By providing a mechanism (for example, a link mechanism) that extracts a large amount of traction of the operating mechanism (brake releasing body) with respect to the upward movement stroke of the second wire W3, the brake can be restored.

When the lower seat plate 41 moves downward after the obstacle is removed and the wire 43 is no longer pulled, the first rotating lever 92 in the second position starts rotating in the second direction due to the force of the coil spring 96. do. As will be described later, in this embodiment, the rotation speed of the first rotation lever 92 in the second direction is reduced. The contact portion 923 at the upper end of the first rotating lever 92 has a concave arcuate surface. , the first rotating lever 92 starts rotating in the second direction, while the second rotating lever 93 maintains the second posture (locked state) (FIG. 28). As can be seen by comparing FIG. 27 and FIG. 28, in the range of play in the locked state between the contact portion 936 of the second turning lever 93 and the locking portion 941 of the third turning lever 94, the second posture When the first rotating lever 92 at the position rotates in the second direction, the second rotating lever 93 also rotates slightly in the second direction, but the locked state is maintained and the second rotating lever 93 rotates in the second direction. The locking portion 934 of the moving lever 93 and the locked portion 903 of the lock drum 90 are locked.

After the first rotating lever 92 has rotated by a predetermined amount, the contact portion 923 of the first rotating lever 92 contacts and acts on the contact portion 942 of the third rotating lever 94, and the third rotating lever When the contact portion 942 on the tip side of the 94 is pushed upward in conjunction with the rotation of the first rotating lever 92, and the third rotating lever 94 is pushed up by a predetermined amount, the third rotating lever 94 is locked. The locked state between the portion 941 and the contact portion 936 of the second rotating lever 93 is released (the locked state of the second rotating lever 93 is maintained until immediately before the locked state is released). The rotating lever 93 is instantaneously rotated in the second direction by the force of the coil spring 97, and the locked state between the locking portion 934 of the second rotating lever 93 and the locked portion 903 of the lock drum 90 is released. and unlocked. FIG. 29 shows the state immediately before the locked state is released. When the contact portion 942 of the third rotating lever 94 is completely pushed up by the contact portion 923 of the first rotating lever 92 from the state of FIG. The moving lever 94 is disengaged from the locking portion 941 , and at the same time, the coil spring 97 instantly turns the second rotating lever 93 in the second direction, and the locking portion 934 is moved to the lock drum 90 . , and the lock drum 90 becomes rotatable (FIG. 30).

In this embodiment, the second wire W3 is wound separately on the lock drum 90 and the winding drum 91 . When both a wire winding mechanism and a locking mechanism are provided in one rotating body (although such aspects are also included in the scope of the present invention), the wire is randomly wound around the rotating body and wound in multiple layers. There is a risk that the outer wire will bite into the wire that has been pulled out, causing a so-called winding restriction. When the winding restriction occurs in the wire, there is a possibility that the smooth unwinding and winding of the wire are affected. In this embodiment, the second wire W3 is first wound around the lock drum 90 three times and then wound around the winding drum 91. is designed to act on Here, since the second wire W3 is wound in one layer (three turns in parallel) around the peripheral surface 901 of the lock drum 90, even if a force acts on the second wire W3, the rotation of the lock drum 90 during rotation is prevented. Even if the machine is suddenly stopped, the wire does not wind up. Further, by winding a plurality of second wires W3 around the lock drum 90, the second wires W3 are prevented from slipping on the peripheral surface 901 of the lock drum 90, and the lock drum 90 and the winding drum 91 rotate together. It's like In addition, since the winding drum 91 incorporates a spiral spring that biases the second wire 3 in the winding direction, even if the lock drum 90 is locked and stops rotating, the second wire W3 is not loosened. does not occur. Further, when the shutter curtain 1 is lifted in the locked state, the second wire W3 wound three times around the lock drum 90 is loosened. Since it is wound, the second wire W3 does not loosen. The touch-up of the shutter curtain 1 when an obstacle is detected can be performed without waiting for unlocking delayed by a delay mechanism, and the time from the stop of the shutter curtain 1 to the touch-up can be shortened. can. Further, when an obstacle is detected, the second wire W3 is pulled downward by the frictional force of the second wire W3 wound three times around the lock drum 90. is applied, the second wire W3 wound three times around the lock drum 90 slides to lower the shutter curtain 1, thereby preventing the second wire W3 from being cut.

The lower end of the first rotating lever 92 is connected to the wire 43 via a coil spring 98, and the coil spring 98 constitutes a buffer spring. In order to return to the brake, the return wire must be pulled by a predetermined amount (that is, the shutter curtain 1 must be lowered by a predetermined amount). Even after the stop portion 934 is engaged with the tooth-like engaged portion 903 of the lock drum 90, it is necessary to relatively move upward. At this time, since the coil spring 98 is stretched, the load on the wire 43 and the locking portion (the locking portion 934 and the locked portion 903) accompanying the upward movement of the lower seat plate 41 after the lock drum 90 is locked. are mitigated. More specifically, after locking (after the engaging portion 934 is engaged with the engaged portion 903), the upper seat plate 40 further moves downward with respect to the lower seat plate 41. The return wire is pulled down. At the same time, the downward movement of the upper seat plate 40 causes the detection lever 42 to rotate further upward, and the wire 43 is further pulled. This prevents the portion 934 from being pressed against the locked portion 903 of the lock drum 90 .

It should be noted that the configuration of the locking device 9 described above is one embodiment and does not limit the scope of the present invention. In the illustrated embodiment, the lock drum 90 and the take-up drum 91 are adjacent, but the lock drum 90 and the take-up drum 91 are spaced apart (as a non-limiting example, about the radius to diameter dimension of these drums). may be placed. In the present embodiment, the lock drum 90 and the take-up drum 91 are separately provided, and the lock drum 90 is locked. 13647), the lock drum and take-up drum may be integrated. In the illustrated embodiment, the first rotating lever 92, the second rotating lever 93, the third rotating lever 94, and the detection lever 42 are arranged only on one side of the lock drum 90, but the detection levers are arranged on both sides of the lock drum 90. and a pair of left and right first rotating levers connected to wires connected to the respective detection levers. In the illustrated embodiment, three rotating levers (first rotating lever 92, second rotating lever 93, and third rotating lever 94) are shown, but one rotating lock lever may be provided ( See FIG. 33, see Patent Document 1).

The configuration of the locking device is not limited as long as it restricts withdrawal of the return wire by upward movement of the lower seat plate 41 . For example, the locking device may not have a winding drum. That is, the winding drum may be provided in a place other than the locking device (for example, a seat plate spaced from the locking device, a portion above an opening such as a lintel, inside a guide rail, or the like). A mode in which the winding drum is provided in the lintel is disclosed in Patent Document 1, for example. The return wire is not necessarily wound around the winding drum. For example, the lower end of the return wire may be guided inside the guide rail by a pulley and the lower end may be fixed to the floor surface or the guide rail. . The lock device is not necessarily limited to one having a lock drum, and may be, for example, one that mechanically restricts withdrawal of the return wire by means of clamping means or pressing means. The locking device is not necessarily limited to one in which all of the constituent elements are provided on the upper seat plate, and includes a mode in which some of the constituent elements of the locking device are provided on the lower seat plate.

[G] Self-weight re-descent delay mechanism As described above, after the obstacle is removed, the lower seat plate 41 moves downward relative to the upper seat plate 40, thereby unlocking the lock device 9. The return wire (first wire W2+second wire W3) can be pulled out, the brake of the opening/closing machine M is released by the operating mechanism of the automatic closing device 6, and the shutter curtain 1 lowers again under its own weight. Here, by providing a damping mechanism so as to provide resistance to the displacement of the movable lock portion (for example, the first rotating lever 92) of the lock device 9 and the detection lever 42 from the second posture to the first posture, Timing for reducing the speed of the movable locking portion in the second posture, which is the locking posture, and rotating it to the first posture, thereby releasing restriction on withdrawal of the return wires (the first wire W2 and the second wire W3). delay. That is, by delaying the timing at which the locking device 9 in the locked state becomes the unlocked state, the return wires (the first wire W2 and the second wire W3) can be pulled out, so that the shutter curtain 1 can be pulled out by its own weight after the obstacle is removed. I'm trying to delay the time until I start re-descent. A specific configuration example will be described below.

First, as shown in FIGS. 26 to 30, the locking device 9 includes a lock drum 90, a winding drum 91, a first rotating lever 92, a second rotating lever 93, a third rotating lever 94, and a It has For the details of the configuration and operation of this locking device 9, the descriptions already mentioned can be used. In addition, the above description can be used for the elements with the same reference numbers. The self-weight re-descent delay mechanism in this embodiment is the delay mechanism 46 that delays the restoration of the first rotating lever 92 .

As shown in FIGS. 41 and 42, the delay mechanism 46 includes a rotary damper 460, a rotating arm 461, a connecting bar 462, and a support plate 463. The support plate 463 extends vertically and is suspended from the upper surface portion 400 of the upper plate 40 by fixing the upper end thereof to the lower surface of the upper surface portion 400 of the upper plate 40 . A rotary damper 460 is fixed to the surface of the support plate 463 .

The rotating arm 461 has a vertical posture extending generally in the vertical direction. connected to nearby parts. The connecting bar 462 extends in the longitudinal direction of the seat plate 4, one end of the connecting bar 462 is connected to the wire 43 via the coil spring 98, and the other end of the connecting bar 462 is the first coil spring. It is connected to the lower end of the moving lever 92 . The connecting bar 462 moves left and right in the longitudinal direction of the seat plate 4 in conjunction with the rotation of the first rotation lever 92 in the first direction and the rotation in the second direction. , the rotating arm 461 rotates in the first direction and the second direction in conjunction with the horizontal movement of the connecting bar 462 .

The rotary damper 460 is a one-way damper that freely allows the rotation of the rotation arm 461 in the first direction without resisting the rotation of the rotation arm 461 in the first direction. By giving resistance to the rotation of the moving arm 461 in the second direction, the moving speed of the connecting bar 462 and the rotating speed of the first rotating lever 92 in the second direction are reduced.

The upper seat plate 40 is provided with a plurality of detection levers 42 spaced apart in the longitudinal direction of the seat plate 4 . As shown in FIGS. 43 and 44, the detection lever 42 is rotatably attached to a support portion 42A fixed inside the upper surface portion 400 of the upper plate 40. As shown in FIGS. In the normal posture of the seat plate 4, the lower seat plate 41 is suspended from the upper seat plate 40. Specifically, as shown in FIG. The contact pieces 411 formed on the upper ends of the left and right side portions 413 of the lower seat plate 41 are engaged with the contact pieces 402 formed on the lower ends of the side portions 401 of the upper seat plate 40 . It is suspended so that it can move up and down. In addition, as shown in FIG. 41, the width of the internal space of the seat plate 4 (upper seat plate 40, lower seat plate 41) is much larger than the delay device 46, so that when the lower seat plate 41 moves upward, the upper seat plate A space is provided to allow the lower seat plate 41 to tilt in the front-rear direction with respect to 40, so that even if the floor surface is inclined, it can be dealt with satisfactorily.

The detection lever 42 has a contact portion 420, and in the normal posture shown in FIGS. 41 and 43, the contact piece 411 of the lower seat plate 41 approaches the contact portion 420 of the detection lever 42 from below. ing. When an obstacle hits the lower surface 410 of the lower seat plate 41 and the lower seat plate 41 moves upward with respect to the upper seat plate 40, the contact piece 411 of the lower seat plate 41 contacts the contacted portion 420 from below. As a result, the detection lever 42 rotates away from the lower end of the first rotating lever 92, and the wire 43 rotates the first rotating lever 92 in the first direction. move to In the posture in which the lower seat plate 41 has moved upward to the upper limit position with respect to the upper seat plate 40, the horizontal portion 414 of the lower seat plate 41 is in contact with the contacted piece 402 of the upper seat plate 40 from below (see FIG. 44). ). When the lower seat plate 41 comes into contact with an obstacle, the self-weight descent and the electric descent are stopped before the lower seat plate 41 moves up to the upper limit position.

The actions of the lock device 9, the detection lever 42, and the delay mechanism 46 will be described. For the operation of the lock device 9, please refer to FIGS. 26 to 30 as appropriate. When the lower end of the shutter curtain 1, which is falling under its own weight, contacts an obstacle and the lower seat plate 41 moves upward relative to the upper seat plate 40, the detection lever 42 moves in conjunction with the upward movement of the lower seat plate 41. It is designed to rotate. The lower ends of the plurality of detection levers 42 (in the normal posture) are connected to each other by wires 43, and one end of the wires 43 is connected to the first rotating lever 92 via a coil spring 98 and a delay mechanism 46. . When the lower seat plate 41 moves upward relative to the upper seat plate 40, the detection lever 42 rotates in the direction away from the lock drum 90, pulls the wire 43 in the direction away from the lock drum 90, and The rotating lever 92 rotates from the first posture to the second posture. At this time, the one-way rotary damper 460 of the damping mechanism 46 does not give resistance to the rotation of the rotating arm 461 accompanying the movement of the connecting bar 462 , so that the detection lever 42 is interlocked with the rotation of the detection lever 42 to quickly perform the first step. 1 rotation lever 92 rotates.

When the first rotating lever 92 rotates in the first direction from the first posture (FIG. 26), the first portion 920 of the first rotating lever 92 contacts the contact portion 935 of the second rotating lever 93. By pressing while touching, the second rotating lever 93 in the first posture rotates together with the first rotating lever 92 in the first direction, and the engaging portion 934 of the second rotating lever 93 rotates. engages with the tooth-like engaging portion 903 of the lock drum 90 to restrict the rotation of the lock drum 90 (FIG. 27).

On the other hand, as shown in FIG. 26, the third rotating lever 94 in the first posture contacts the contact portion 936 of the second rotating lever 93 in the first posture, thereby moving downward. Rotation is restricted. When the second rotating lever 93 in the first posture rotates together with the first rotating lever 92 in the first direction, the contact portion 936 of the second rotating lever 93 moves toward the third rotating lever 94 . At the same time as the corner portion of the locking portion 941 is overcome and locked to the locking portion 941, the third rotating lever 94 is rotated downward by its own weight to assume the second posture (FIG. 27).

When the first rotating lever 92 , the second rotating lever 93 , and the third rotating lever 94 are in the second posture, the first rotating lever 92 is held in the second posture by the pulling force of the wire 43 . The second posture of the second rotating lever 93 is held by contacting the contact portion 935 of the second rotating lever 93 with the first portion 920 of the first rotating lever 92 in the second posture. , the second posture of the third rotating lever 94 is held by contacting the contacting portion 923 of the first rotating lever 92 with the contacting portion 942 of the third rotating lever 94 . Therefore, when the wire 43 is pulled, that is, when the obstacle is detected, the first rotating lever 92, the second rotating lever 93, and the third rotating lever 94 maintain the second position and are locked. The rotation of the lock drum 90 is restricted when the device 9 is in the locked state.

When the rotation of the lock drum 90 stops, the withdrawal of the second wire W3 is restricted and the length of the second wire W3 becomes constant. Then, the first wire W2 is pulled via the second wire W3 and the relay device 8, and the first operating body 73 slides in the second direction. During the electric descent, the first operating body 73 in the steady position moves in the second direction, the first microswitch SW1 turns from ON to OFF, and the obstacle detection signal (seat plate actuation signal) detects the obstacle. The obstacle detection control panel 11A and the shutter control panel 11B that have received the obstacle detection signal sent to the control panel 11A stop driving the opener M, and the shutter curtain 1 stops falling. When the dead weight is being lowered, the first operating body 73 in the brake release position moves to the normal position (brake return position), so that the brake release lever ML returns and the brake returns, and the winding shaft 2 is released. The rotation is regulated and the shutter curtain 1 stops descending.

When the lower seat plate 41 moves downward after the obstacle is removed and the wire 43 is no longer pulled by the detection lever 42, the first rotating lever 92 in the second posture is moved in the second direction by the force of the coil spring 96. Start rotating. At this time, the one-way rotary damper 460 of the delay device 46 provides resistance to the rotation of the rotating arm 461 in the second direction, and the rotating arm 461 slowly rotates in the second direction. The connecting bar 462 pulled by the wire 43 and moved in the first direction slowly moves in the second direction. Therefore, the rotation speed in the second direction of the first rotation lever 92 connected to the end of the connection bar 462 is reduced.

After the first rotating lever 92 has rotated by a predetermined amount, the contact portion 923 of the first rotating lever 92 contacts and acts on the contact portion 942 of the third rotating lever 94, and the third rotating lever When the contact portion 942 on the tip side of the 94 is pushed upward in conjunction with the rotation of the first rotating lever 92, and the third rotating lever 94 is pushed up by a predetermined amount, the third rotating lever 94 is locked. The locked state between the portion 941 and the contact portion 936 of the second rotating lever 93 is released (the locked state of the second rotating lever 93 is maintained until immediately before the locked state is released). The rotating lever 93 is instantaneously rotated in the second direction by the force of the coil spring 97, and the locked state between the locking portion 934 of the second rotating lever 93 and the locked portion 903 of the lock drum 90 is released. and unlocked. FIG. 29 shows the state immediately before the locked state is released. When the contact portion 942 of the third rotating lever 94 is completely pushed up by the contact portion 923 of the first rotating lever 92 from the state of FIG. The moving lever 94 is disengaged from the locking portion 941 , and at the same time, the coil spring 97 instantly turns the second rotating lever 93 in the second direction, and the locking portion 934 is moved to the lock drum 90 . , and the lock drum 90 becomes rotatable (FIG. 30).

In this embodiment, by using the delay device 46 provided on the seat plate, the time until the lock device 9 is released from the locked state after the obstacle is removed is delayed, and after a predetermined delay, the locked state (engagement state) is released. This realizes a mechanism that delays the re-descent timing of the shutter curtain that has stopped once due to the detection of an obstacle. More specifically, in the present embodiment, the rotation lock lever is composed of two members (a first rotation lever 92 that rotates in conjunction with the upward movement of the lower seat plate, a second rotation lever that engages with the lock drum). lever 93), and the rotation of the second rotation lever 93 in the unlocking direction (second direction) is separated from the rotation of the first rotation lever 92 in the second direction, The second rotating lever 93 is configured to rotate in the second direction to release the locked state when the first rotating lever 92 rotates in the second direction by a predetermined amount. By slowly rotating the first rotating lever 92 in the second direction by , the timing of releasing the locked state is delayed, and the time from the removal of the obstacle to the start of re-lowering of the shutter curtain is delayed. Let

[H] Fire shutter with mechanical safety device that does not use commercial power (first embodiment)
A first embodiment of a fire shutter with a mechanical safety device that does not use a commercial power supply will be described with reference to FIG. 45 . FIG. 45 is a schematic front view of an electric shutter device equipped with a safety device. In the figure, solid lines connecting elements are electric wires, and dashed-dotted lines are wires. It should be noted that the basic configuration of the fire shutter with a mechanical safety device is the same as the fire shutter described above, and the above description can be used as appropriate.

[H-1] Overall structure of fire shutter As shown in FIG. 45, the shutter device includes a shutter curtain 1 for opening and closing an opening formed between left and right guide rails 3, and a shutter above the opening in the width direction of the opening. Opening and closing machine M provided in a part near one side, control units (11A, 11B), opening and closing operation unit (first operation box 10A), manual closing device (second operation box 10B), disaster prevention An automatic closing device 6 that lowers the shutter curtain 1 by its own weight by inputting a fire detection signal from the panel 6b or operation from a manual closing device, and detects an obstacle when the shutter curtain 1 that is electrically lowered or lowered by its own weight hits an obstacle. and a mechanical safety device using the obstacle detection means.

The shutter curtain 1 is constructed by vertically connecting a plurality of elongated slats extending in the width direction of the opening, and a seat plate 4 is provided at the lower end. The seat plate 4 includes a long upper seat plate 40 extending in the width direction of the opening, and a long upper seat plate 40 suspended below the upper seat plate 40 so as to be vertically movable relative to the upper seat plate 40 . The seat plate 4 is one component of the obstacle detection means.

The shutter device includes an automatic closing device 6 for lowering the shutter curtain 1 by its own weight in the event of a fire, and an operating portion 7 (brake release/reset device). The automatic closing device 6 is activated by the input of the fire detection signal from the disaster prevention board 6b, and releases the brake through the wire W1 and the operating portion 7. In the illustrated embodiment, the automatic closing device 6 and the operating part 7 are separated from each other, the automatic closing device 6 and the operating part 7 are mechanically connected via the wire W1, and when the fire signal is input, the automatic closing device 6 is automatically closed. By operating the device 6 and pulling the wire W1, the operating part 7 assumes the brake release posture and the brake of the opening/closing machine M is released. In this embodiment, the recovery mechanism 5 is integrated with the automatic closing device 6 . As for the specific configurations of the automatic closing device 6, the operating portion 7, and the recovery mechanism 5, the above description can be referred to.

In this embodiment, the control unit is composed of an obstacle detection control panel 11A and a shutter control panel 11B. As shown in FIG. 45, in this embodiment, the operating section 7 and the obstacle detection control panel 11A are electrically connected, and the obstacle detection control panel 11A and the shutter control panel 11B are electrically connected. The open/close operation switches 100 (open switch U, close switch D, stop switch S) in the first operation box 10A of the operation box 10 and the obstacle detection control panel 11A are electrically connected. During electric lifting, an open signal, a close signal, and a stop signal based on the input from the switch are transmitted to the shutter control panel 11B via the obstacle detection control panel 11A. In the illustrated embodiment, the obstacle detection control panel 11A and the shutter control panel 11B are physically separated, but the control unit has the functions of the obstacle detection control panel 11A and the shutter control panel 11B. It may be one controller. As mentioned above, it is possible to respond to different controls in the electric opening and closing mode and the dead weight descent mode (fire mode).

When a fire breaks out in the fully open state of the opening, the fire is detected by the fire sensor 6a, the fire detection signal from the disaster prevention panel 6b activates the automatic closing device 6, and the operating part 7 is in the brake release posture via the wire W1. As a result, the brake of the opening/closing machine M is released. When the brake is released, the shutter curtain 1 descends under its own weight while both ends in the width direction are guided by the grooves of the guide rails 3, and the seat plate 4 lands on the floor to fully close the opening.

The shutter device is equipped with a so-called hazard prevention device, and when the seat plate 4 at the lower end of the shutter curtain 1 that is falling under its own weight hits an obstacle and detects the obstacle, the brake of the opening/closing machine M is reset via a return wire. to stop the descent of the shutter curtain 1. The return wire is composed of a first wire W2 and a second wire W3. In the upper part of the opening, a relay device 8 is provided closer to the opening width direction side where the opening and closing machine M is installed, and the seat plate 4 is positioned below the relay device 8 in the opening width direction. A locking device 9 is provided near one side of the .

The first wire W2 and the second wire W3 are connected via the relay device 8. As shown in FIG. One end of the first wire W2 is connected to the operating portion 7 (first operating body 73) so as to move the brake releasing body (first operating body 73) in the brake return direction, and the other end is connected to the relay device 8. It is One end of the second wire W3 is connected to the relay device 8, and the other end is connected to the lock device 9 provided on the seat plate 4. As shown in FIG. The second wire W3 is pulled out so as to extend along the surface portion of the shutter curtain 1 as the shutter curtain 1 descends.

The lock device 9 is provided on the upper plate 40, and the lower plate 41 of the shutter curtain 1 that is being lowered hits an obstacle and moves upward relative to the upper plate 40, thereby causing the return wire (second wire W3) to move upward. ) is mechanically restricted, and the return wire (second wire W3+first wire W2) whose extension is restricted pulls the brake release body (first operating body 73) in the brake return direction. . In this manner, when the lower plate 41 of the shutter curtain 1 during its own weight descent hits an obstacle, the return wire (second wire W3+first wire W2) causes the brake releasing body (first operating body 73) to be released. to the brake return position to stop the drop of the shutter curtain 1 by its own weight.

When the obstacle is removed, the return wire can be pulled out, the brake release body (first operating body 73) moves in the brake release direction, and the shutter curtain 1 descends again under its own weight. In addition, after the obstacle is removed, the timing at which the shutter curtain 1 descends again by its own weight is delayed. As described above, even when the seat plate 4 at the lower end of the shutter curtain 1 during electric descent hits an obstacle, the brake release body (first operating body 73) is detected to stop the shutter curtain 1 that is being electrically lowered. As for the specific configurations of the relay device 8 and the lock device 9, the above description can be used.

In this embodiment, regardless of whether the shutter curtain 1 is lowered by its own power or by its own weight, when the closed shutter curtain 1 hits an obstacle, the descent of the shutter curtain 1 is stopped via the operating unit 7 (electric In the case of descent, the microswitch SW1 is actuated, and in the case of self-weight descent, the brake release lever ML is mechanically returned. The shutter device according to the present embodiment is composed of obstacle detection means (the seat plate 4, the detection lever 42, the winding drum 91 of the lock device 9, the second wire W3, etc.) for detecting an obstacle when the shutter curtain 1 is lowered. ), a mechanical stopping means (mechanical return of the brake release lever ML) for mechanically stopping the shutter curtain 1 that is descending under its own weight when an obstacle is detected, and the shutter curtain 1 that is electrically descending when an obstacle is detected. and an electrical stop means (operation of microswitch SW1) for stopping. As described above, the shutter device according to the present embodiment includes re-lowering means (self-weight re-lowering means) for re-lowering the stopped shutter curtain 1 when the obstacle detection state changes to the obstacle non-detection state. ing.

As shown in FIG. 45, an operation box 10 is provided on the wall near the shutter device at a height that is easy to operate. The operation box 10 includes a right first operation box 10A having a vertically elongated rectangular parallelepiped box and a left second operation box 10B having a vertically elongated rectangular parallelepiped box. For the operation box 10, for example, by dividing the inner space of one box into left and right spaces, a first operation box 10A and a second operation box 10B may be formed, or two independent boxes may be placed adjacent to each other. It may be something that was made A first lid 101 is openable and closable on the front surface of the first operation box 10A, and a second lid 102 is openable and closable on the front surface of the second operation box 10B (see FIG. 34). FIG. 46 is a front view of the operation box, omitting the lid.

The first operation box 10A is a switch box, and as shown in FIG. 46, an open/close operation switch 100 consisting of an open switch U, a close switch D, and a stop switch S is provided on a front surface portion 100A within the first operation box 10A. are placed. When the opening/closing operation switch 100 is connected to the power supply (temporary power supply), the opening/closing operation switch 100 is electrically connected to the control unit (obstacle detection control panel 11A, shutter control panel 11B). When the open switch U is pushed, the shutter curtain 1 is raised by the opening/closing machine M via the control section, and when the closing switch D is pushed, the shutter curtain 1 is lowered by the opening/closing machine M via the control section, and the stop switch S is closed. When pressed, the drive of the opening/closing machine M is stopped via the control section, and the shutter curtain 1 is stopped.

The second operation box 10B is a manual operation box, and is provided with an operation portion of a manual closing device and an operation portion of a restoration device of the automatic closing device 6. As shown in FIG. In the second operation box 10B, an emergency closing switch (a push switch in the illustrated embodiment) 103 for manual closing is provided at the lower portion of the front surface portion 100B. A rotary lever 104 is rotatably provided adjacent to the second cover body 102 at the side portion. The pushing operation of the emergency closing switch 103 and the manual turning operation of the turning lever 104 can be performed in a state where the second cover 102 of the second operation box 10B is closed.

The operating portion (emergency closing switch 103, rotating lever 104) of the manual closing device is mechanically connected to one end of a wire W4 for manual operation so that the operating portion 7 can be operated to release and return the brake. there is The other end of the wire W4 is connected to the operating portion 7. As shown in FIG. The operation unit of the manual closing device operates to release the brake by a first operation (pushing operation of the emergency closing switch 103) from the state before the brake release operation, and operates to release the brake from the state after the brake release operation. (Rotating lever 104) operates to restore the brake. A pulley 107 around which the automatic closing device restoration wire W5 is wound is provided on the front portion 100B inside the second operation box 10B, and the restoration lever 106 (see FIG. 36) is operated by the automatic closing device restoration wire W5. and constitutes a recovery device for the automatic closing device 6 together with the recovery mechanism 5 .

[H-2] Temporary Power Supply The shutter device shown in FIG. 45 is not equipped with a battery for supplying electric power for driving the opening/closing machine M, and is not connected to any commercial power supply. A general electric shutter opener is normally connected to a commercial power supply via a circuit breaker Br, and is driven by power supplied from the commercial power supply. On the other hand, in the present embodiment, the primary side of the circuit breaker Br to which the electric wire extending from the shutter control panel 11B of the switch M is connected is not connected to the commercial power supply, but is connected to the electric wire EW1. The electric wire EW1 extends to a lower portion through a wall (framework), and a connector C1 as a connecting portion is provided at the end of the electric wire EW1. A temporary power source can be connected to the connector C1. A terminal end of the electric wire EW2 can be externally connected to the connector C1, and a temporary power supply is connected to the base end of the electric wire EW2. The temporary power supply is a power supply that can be connected to a connection portion (connector C1) provided on the electric wire EW1 that supplies power to the switch M, and the connection portion (connector C1) is connected to the connection portion (connector C1) in the normal use state of the shutter device. It is a power supply that is not connected and is not in a state capable of supplying power to the switch M, and is temporarily connected to the connection portion (connector C1) only when the shutter needs to be electrically driven. is.

More specifically, the electric wire EW1 connected to the primary side of the circuit breaker Br passes through the wall on the side of the guide rail 3 and extends to the operation box 10 embedded in the lower portion of the wall. A connector C1 is exposed from the front surface portion 100A of the first operation box 10A (see FIG. 46). By opening the lid 101 (see FIG. 34) of the first operation box 10A, the connection portion C2 at the tip of the electric wire EW2 can be connected to the connector C1 from the outside.

A portable power generator G is prepared as a temporary power supply, and an electric wire EW2 having a connector C2 that can be connected to the connector C1 is provided on the output side of the power generator G, and the connector C1 is exposed on the front part 100A of the first operation box 10A. A generator G can be connected to . The generator G is, for example, a movable generator G provided with running rollers, and is normally stored in place.

Thus, by providing the connector C1 to which the generator G as a temporary power source can be connected from the outside in the operation box 10 having the opening/closing operation switch 100, the generator G can be connected at the same place as the opening/closing operation switch 100 for the shutter. The connection can be made, and the connection of the generator G and the operation from the open/close operation switch 100 can be performed smoothly. Also, the electric wire EW1 can be routed inside the frame using part of the hollow portion of a pipe or the like (embedded in the wall) through which the electric wire connected to the open/close operation switch 100 extends. In the illustrated embodiment, the connector C1 at the end of the electric wire EW1 is exposed on the front surface 100A of the first operation box 10A, but may be exposed on the front surface 100B of the second operation box 10B. In this case as well, the electric wire EW1 can be routed inside the frame using a part of the hollow portion of the pipe or the like (embedded in the wall) through which the wire W4 extends.

In the above example, the electric wire EW1 for supplying electric power to the switch M is provided so as to pass through the wall, but the electric wire EW1 may be provided along the outer surface of the wall. Alternatively, the electric wire EW1 may be guided through the guide rail 3 to the lower part of the opening. More specifically, the electric wire passes through the guide rail 3 or extends along the outer surface of the guide rail 3 to a lower portion of the guide rail 3, and the end of the electric wire EW1 at the lower portion has an external A connector C1 is provided as a connecting portion that can be connected from the The connector C1 may be provided so as to be exposed on the outer surface of the guide rail 3, or if the guide rail 3 is provided with an opening/closing operation portion or a manual closing device, the connector C1 can be exposed to the outside at the opening/closing operation portion or the manual closing device. may be set to Alternatively, the electric wire EW1 may be routed through the wall or guide rail 3, or along the outer surface of the wall or the outer surface of the guide rail 3, at a portion below the guide rail 3 or a portion below the wall (floor or inside the floor). ), and a connector C1 as a connection part that can be connected from the outside may be provided on a wall independent from the operation box 10 and the guide rail 3, on the floor surface, or at a portion within the floor surface. .

Instead of the generator G, a power outlet (not shown) exposed on the wall may be used as a temporary power source, and the power outlet and the connector C1 at the end of the wire EW1 may be connected using the wire EW2. When the power outlet is used as a temporary power supply, a transformer is provided as necessary (for example, when the switch operates at 200 V) to convert the voltage.

In this embodiment, the temporary power supply for supplying power for driving the switch M is a portable generator or a power outlet that can be connected to the connector C1. ) are not connected to the connector C1.

In one aspect, the shutter device shown in FIG. 45 is normally used with the shutter fully closed, and the connector C1 is not connected to the portable generator or the power outlet in the normal use state. In the normal state (fully closed state), even if the open switch U of the operation box 10 is pressed, the shutter curtain 1 in the fully closed posture does not rise. When it becomes necessary to open the shutter for reasons such as maintenance, a generator G is prepared and connected to the connector C1 so that the generator G can be used as a temporary power supply to supply electricity to the switch M. By supplying it, the opening/closing machine M can be driven, and the shutter is opened by pressing the open switch U.

When the shutter curtain 1 that has once been raised using the generator G as a temporary power source is to be lowered, the closing switch D is pressed to start the shutter curtain 1 to be lowered. If an obstacle is detected during the descent of the shutter curtain 1, the shutter curtain 1 is stopped by the electrical stopping means (operation of the microswitch SW1), and the closing switch D is pressed after the obstacle is not detected. As a result, the stopped shutter curtain 1 is lowered again to be in a fully closed state. The shutter curtain 1 may be lowered by operation from the manual closing device, and if an obstacle is detected while the shutter curtain 1 is being lowered, mechanical stopping means (mechanical return of the brake release lever ML ) stops the shutter curtain 1 and the obstacle is not detected, the stopped shutter curtain 1 is lowered again by the dead weight re-lowering means to be in a fully closed state. When the shutter curtain 1 is lowered by its own weight during inspection, instead of the manual closing device, the shutter curtain 1 may be lowered by its own weight using a pseudo signal generated by pressing the operation button of the disaster prevention panel, or the brake may be released. The shutter curtain 1 may be lowered by its own weight by directly operating the lever.

In this embodiment, the shutter device is not connected to a commercial power source, and the generator can be easily connected only when the shutter is opened. It is possible to reduce the cost of laying work. In this embodiment, if there is a generator or a power outlet, the shutter device (not connected to the commercial power supply and not equipped with a battery), which is normally used in a fully closed state, can be electrically opened. It is also possible to electrically open a plurality of shutter devices using one portable generator. Further, since the shutter device according to the present embodiment is provided with a mechanical safety device, it is possible to detect an obstacle even if it is not normally connected to a power source and does not have a battery. It is possible, and re-descent after obstacle removal is possible.

[H-3] Shutter Device Installed in Warehouse FIG. 47 is a schematic plan view of a warehouse in which a plurality of shutter devices SD1 to SD12 are arranged. Shutter devices SD4 to SD12 are fire shutter devices shown in FIG. The warehouse has an outer wall that is rectangular in plan view, and one of the outer walls has three openings (entrances), and shutter devices SD1, SD2, and SD3 are installed to open and close each opening. . In the illustrated embodiment, these shutter devices SD1, SD2, SD3 are fully open.

In the warehouse, a stepped portion F for unloading is provided so as to face the opening with a distance therebetween, and a transport vehicle can enter up to the vicinity of the stepped portion F. Walls extending in the longitudinal direction and the lateral direction are provided in the warehouse, and a plurality of openings are formed in these walls, and shutter devices SD4 to SD12 are installed in each of the openings. In the illustrated embodiment, the shutter devices SD4, SD5, SD6, SD7, SD11 and SD12 are fully closed, and the shutter devices SD8, SD9 and SD10 are fully open. That is, the shutter devices SD4, SD5, SD6, SD7, SD11, and SD12 form partition walls, which divide the warehouse space into three sections. In this manner, desired divisions can be formed in the warehouse by selecting the shutter device to be in the open position or the closed position as required.

In one aspect, the shutter devices SD1 to SD3 are connected to a commercial power source and can electrically open and close the entrance and exit of the warehouse. As such, close the entrance and exit of the warehouse. During normal times (regardless of whether the cargo is being carried in or not), the shutter devices SD4, SD5, SD6, SD7, SD11, and SD12 are used with the openings fully closed, and the shutter devices SD8, SD9, and SD10 are open. It is used in fully open state.

Shutter devices SD4-SD12 are not connected to any commercial power supply and are not equipped with batteries. An electric wire EW1 extending from each opener M of each shutter device of the shutter devices SD4 to SD12 extends downward through the wall member or the guide rail 3, and a connector C1 is provided at the end of the electric wire EW1. . A connection portion C2 of the generator G can be connected to the connector C1 from the outside.

When it becomes necessary to open and close the shutter devices SD4 to SD12 for reasons such as maintenance, the connecting portion C2 of the generator G is connected to the connector C1 of the desired shutter device, and the generator G is used as a temporary power supply for opening and closing. By supplying electricity to the machine M, the switch machine M can be driven. As for the shutter devices SD4, SD5, SD6, SD7, SD11, and SD12, the shutter curtain 1 is raised by pressing the open switch U. For the shutter devices SD8, SD9 and SD10, the shutter curtain 1 is lowered by pressing the closing switch D.

In this way, some or all of the plurality of shutter devices SD1 to SD12 (shutter devices SD4 to SD12 in this embodiment) normally have their openings fully closed (SD4, SD5, SD6, SD7, SD11, SD12) or fully open state (SD8, SD9, SD10), and normally no power source is connected to the opener M of these shutter devices. When opening a desired shutter device (SD4, SD5, SD6, SD7, SD11, SD12) whose opening is fully closed, a generator G or a power outlet is connected to the connector C1 corresponding to the shutter device, and the opening/closing operation is performed. When the shutter curtain 1 is electrically raised by the opening operation from the switch 100 and the desired shutter device (SD8, SD9, SD10) whose opening is fully opened is closed, the generator G or the connector C1 corresponding to the shutter device is connected. A power outlet is connected and the shutter curtain 1 is electrically lowered by a closing operation from the open/close operation switch 100, or the shutter curtain 1 is lowered by its own weight using a manual closing device.

[I] Fire shutter with mechanical safety device that does not use a commercial power supply (second embodiment)
A second embodiment of a fire shutter with a mechanical safety device that does not use a commercial power supply will be described with reference to FIG. 45A. FIG. 45A is a view similar to FIG. 45, and for elements with the same reference numerals, the above description can be applied, except for the following differences. The major difference between the first embodiment shown in FIG. 45 and the second embodiment shown in FIG. 45A is that the control unit of the first embodiment includes an obstacle detection control panel 11A, whereas the control unit of the second embodiment has an obstacle detection control panel 11A. The controller of the second embodiment does not include the obstacle detection control panel 11A. The point is that the switches SW1 and SW2 are not provided.

[I-1] Overall configuration of fire shutter As shown in FIG. The opening and closing machine M provided in a part near one side, the control unit (shutter control panel 11B), the operation unit (open switch U), the manual closing device (emergency closing switch 103), and the disaster prevention panel 6b an automatic closing device 6 that lowers the shutter curtain 1 by its own weight when a fire detection signal is input from the shutter curtain 1 or an operation from the manual closing device; and a mechanical safety device using this obstacle detection means.

The shutter device includes an automatic closing device 6 for lowering the shutter curtain 1 by its own weight in the event of a fire, and an operating portion 7 (brake release/reset device). The automatic closing device 6 is activated by the input of the fire detection signal from the disaster prevention board 6b, and releases the brake through the wire W1 and the operating portion 7. In the illustrated embodiment, the automatic closing device 6 and the operating part 7 are separated from each other, the automatic closing device 6 and the operating part 7 are mechanically connected via the wire W1, and when the fire signal is input, the automatic closing device 6 is automatically closed. By operating the device 6 and pulling the wire W1, the operating part 7 assumes the brake release posture and the brake of the opening/closing machine M is released. In this embodiment, the recovery mechanism 5 is integrated with the automatic closing device 6 . The actuating portion 7 according to the second embodiment differs from the actuating portion 7 according to the first embodiment in that the microswitches SW1 and SW2 are not provided. For the specific configurations of the automatic closing device 6, the actuating portion 7, and the recovery mechanism 5, the above description can be referred to, except for the description of the microswitches SW1 and SW2.

When a fire breaks out in the fully open state of the opening, the fire is detected by the fire sensor 6a, the fire detection signal from the disaster prevention panel 6b activates the automatic closing device 6, and the operating part 7 is in the brake release posture via the wire W1. As a result, the brake of the opening/closing machine M is released. When the brake is released, the shutter curtain 1 descends under its own weight while both ends in the width direction are guided by the grooves of the guide rails 3, and the seat plate 4 lands on the floor to fully close the opening.

The shutter device is equipped with a so-called hazard prevention device, and when the seat plate 4 at the lower end of the shutter curtain 1 that is falling under its own weight hits an obstacle and detects the obstacle, the brake of the opening/closing machine M is reset via a return wire. to stop the descent of the shutter curtain 1. The return wire is composed of a first wire W2 and a second wire W3. In the upper part of the opening, a relay device 8 is provided closer to the opening width direction side where the opening and closing machine M is installed, and the seat plate 4 is positioned below the relay device 8 in the opening width direction. A locking device 9 is provided near one side of the .

The first wire W2 and the second wire W3 are connected via the relay device 8. As shown in FIG. One end of the first wire W2 is connected to the operating portion 7 (first operating body 73) so as to move the brake releasing body (first operating body 73) in the brake return direction, and the other end is connected to the relay device 8. It is One end of the second wire W3 is connected to the relay device 8, and the other end is connected to the lock device 9 provided on the seat plate 4. As shown in FIG. The second wire W3 is pulled out so as to extend along the surface portion of the shutter curtain 1 as the shutter curtain 1 descends.

The lock device 9 is provided on the upper plate 40, and the lower plate 41 of the shutter curtain 1 that is being lowered hits an obstacle and moves upward relative to the upper plate 40, thereby causing the return wire (second wire W3) to move upward. ) is mechanically restricted, and the return wire (second wire W3+first wire W2) whose extension is restricted pulls the brake release body (first operating body 73) in the brake return direction. . In this manner, when the lower plate 41 of the shutter curtain 1 during its own weight descent hits an obstacle, the return wire (second wire W3+first wire W2) causes the brake releasing body (first operating body 73) to be released. to the brake return position to stop the drop of the shutter curtain 1 by its own weight.

When the obstacle is removed, the return wire can be pulled out, the brake release body (first operating body 73) moves in the brake release direction, and the shutter curtain 1 descends again under its own weight. In addition, after the obstacle is removed, the timing at which the shutter curtain 1 descends again by its own weight is delayed. As for the specific configurations of the relay device 8 and the lock device 9, the above description can be used.

In this embodiment, when the shutter curtain 1 hits an obstacle during its own weight descent, the descent of the shutter curtain 1 is stopped via the actuating portion 7 (mechanical return of the brake release lever ML). The shutter device according to the present embodiment comprises obstacle detection means (the seat plate 4, the detection lever 42, the winding drum 91 of the lock device 9, the second wire W3, etc.) for detecting an obstacle when the shutter curtain 1 falls under its own weight. and a mechanical stop means (mechanical return of the brake release lever ML) for mechanically stopping the shutter curtain 1 that is falling under its own weight when an obstacle is detected. As described above, the shutter device according to the present embodiment includes re-lowering means (self-weight re-lowering means) for re-lowering the stopped shutter curtain 1 when the obstacle detection state changes to the obstacle non-detection state. ing.

As shown in FIG. 45A, an operation box 10' is provided on the wall near the shutter device at a height that is easy to operate. As shown in FIG. 46A, the operation box 10' consists of a left first operation box 10A' in the form of a vertically long rectangular parallelepiped box and a right second operation box 10B' in the shape of a vertically long rectangular parallelepiped box. For example, the operation box 10' may be formed by dividing the inner space of one box into left and right spaces to form a first operation box 10A' and a second operation box 10B', or two independent boxes. It may be a body adjoining one. The front surfaces of the first operation box 10A' and the second operation box 10B' are respectively provided with lids that can be opened and closed, but the lids are omitted in FIG. 46A.

In this embodiment, the control section consists of a shutter control panel 11B. As shown in FIG. 46A, an opening switch U is arranged on the front surface portion 100A' inside the first operation box 10A'. As shown in FIG. 45A, the open switch U of the operation box 10' and the shutter control panel 11B can be electrically connected. When the temporary power supply is valid, the opening switch U is electrically connected to the shutter control panel 11B, and at the time of electric opening, an opening signal based on the input of the opening switch U is sent to the shutter control panel 11B, The shutter curtain 1 is raised by the opener M via the shutter control panel 11B. In one mode, the shutter curtain 1 is lifted by fully pressing the open switch U (the shutter curtain 1 is lifted only while the open switch U is being continuously pressed). Alternatively, the stop operation may be performed according to the pressing pattern of the open switch U. For example, the first press of the open switch U causes the shutter curtain 1 to start rising, and the second press causes the rising shutter curtain 1 to start rising. may be stopped. Alternatively, a stop switch may be provided separately from the open switch U.

The first operation box 10A' is further provided with an operation portion of a manual closing device. As shown in FIG. 46A, in the first operation box 10A', an emergency closing switch (a push switch in the illustrated embodiment) 103 for manual closing is provided at the lower portion of the front face portion 100A'. A rotating lever 104 is rotatably provided adjacent to a lid body (not shown) at the side portion of the front portion 100A' of the operation box 10A'. The pressing operation of the emergency closing switch 103 and the manual rotating operation of the rotating lever 104 can be performed in a state where the cover (not shown) of the first operation box 10A' is closed.

The operating portion (emergency closing switch 103, rotating lever 104) of the manual closing device is mechanically connected to one end of a wire W4 for manual operation so that the operating portion 7 can be operated to release and return the brake. there is The other end of the wire W4 is connected to the operating portion 7. As shown in FIG. The operation unit of the manual closing device operates to release the brake by a first operation (pushing operation of the emergency closing switch 103) from the state before the brake release operation, and operates to release the brake from the state after the brake release operation. (Rotating lever 104) operates to restore the brake. The above description can be used for the specific configuration of the manual closing device.

A pulley 107 around which an automatic closing device restoration wire W5 is wound is provided on the bottom portion (recessed from the front surface) 100B′ in the second operation box 10B′, and a restoration lever 106 (see FIG. 36). ) is connected to the recovery mechanism 5 by an automatic closing device recovery wire W5, and together with the recovery mechanism 5 constitutes a recovery device for the automatic closing device 6. Inside the second operation box 10B', the lower portion of the electric wire EW1 extends so as to hang down, and the lower end of the electric wire EW1 is provided with a connector C1 as a connecting portion (see FIG. 46A). As for the specific configuration of the recovery mechanism 5, the above description can be used.

[I-2] Temporary Power Supply The shutter device shown in FIG. 45A is not equipped with a battery that supplies power to drive the switch M, and is not connected to any commercial power supply. In this embodiment, the primary side of the circuit breaker Br to which the electric wire extending from the shutter control panel 11B of the switch M is connected is not connected to the commercial power source, but is connected to the electric wire EW1. A connector C1 is provided at the end of the electric wire EW1, and a temporary power source can be connected to the connector C1. A connecting portion (connector C2) at the tip of the electric wire EW2 can be connected to the connector C1 from the outside, and a temporary power supply is connected to the base end of the electric wire EW2. The temporary power supply is a power supply that can be connected to a connection portion (connector C1) provided on the electric wire EW1 that supplies power to the switch M, and the connection portion (connector C1) is connected to the connection portion (connector C1) in the normal use state of the shutter device. A power supply that is not connected and is not in a state capable of supplying power to the switch M, and is temporarily connected to the connection portion (connector C1) only when the shutter needs to be electrically opened. is.

More specifically, the electric wire EW1 connected to the primary side of the circuit breaker Br extends through the wall on the side of the guide rail 3 to an operation box 10' embedded in the lower part of the wall. , the lower end portion of the electric wire EW1 extends into the second operation box 10B' (see FIG. 46A). A connection portion (connector C2) at the tip of the electric wire EW2 can be connected from the outside.

A portable generator G is prepared as a temporary power supply, and a wire EW2 having a connector C2 that can be connected to the connector C1 is provided on the output side of the generator G, and the lower end of the wire EW1 hanging down inside the first operation box 10B is A generator G can be connected to the provided connector C1. The generator G is, for example, a movable generator G provided with running rollers, and is normally stored in place.

Thus, by providing the connector C1 to which the generator G as a temporary power source can be connected from the outside in the operation box 10' having the open switch U, the generator G can be connected at the same location as the open switch U of the shutter. can be performed, and the connection of the generator G and the opening operation using the opening switch U can be performed smoothly. Also, the wire EW1 can be routed inside the frame using a part of the hollow portion of the pipe or the like (embedded in the wall) through which the wire W4 extends. Alternatively, by exposing the connector C1 at the end of the electric wire EW1 to the front surface portion 100A of the first operation box 10A (see FIG. 46), a pipe or the like to which the electric wire connected to the open switch U extends (which is embedded in the wall). The electric wire EW1 may be routed inside the frame using a part of the hollow portion of the housing.

In the above example, the electric wire EW1 for supplying electric power to the switch M is provided so as to pass through the wall, but the electric wire EW1 may be provided along the outer surface of the wall. Alternatively, the electric wire EW1 may be guided through the guide rail 3 to the lower part of the opening. More specifically, the electric wire passes through the guide rail 3 or extends along the outer surface of the guide rail 3 to a lower portion of the guide rail 3, and the end of the electric wire EW1 at the lower portion has an external A connector C1 is provided as a connecting portion that can be connected from the The connector C1 may be provided on the outer surface of the guide rail 3 so as to be exposed, or if the guide rail 3 is provided with an operating portion or a manual closing device, the connector C1 may be provided so as to be exposed to the outside at the operating portion or the manual closing device. may Alternatively, the electric wire EW1 may be routed through the wall or guide rail 3, or along the outer surface of the wall or the outer surface of the guide rail 3, at a portion below the guide rail 3 or a portion below the wall (floor or inside the floor). ), and a connector C1 as a connection part that can be connected from the outside may be provided on a wall independent from the operation box 10 and the guide rail 3, on the floor surface, or at a portion within the floor surface. .

Instead of the generator G, a power outlet (not shown) exposed on the wall may be used as a temporary power source, and the power outlet and the connector C1 at the end of the wire EW1 may be connected using the wire EW2. When the power outlet is used as a temporary power supply, a transformer is provided as necessary (for example, when the switch operates at 200 V) to convert the voltage. When using a power outlet as the temporary power source, a power drum can be used as the electric wire EW2.

In this embodiment, the temporary power supply for supplying power for driving the switch M is a portable generator or a power outlet that can be connected to the connector C1. ) are not connected to the connector C1.

In one aspect, the shutter device shown in FIG. 45A is normally used with the shutter fully closed, and the connector C1 is not connected to the portable generator or the power outlet in the normal use state. In the normal state (fully closed state), even if the open switch U of the operation box 10 is pressed, the shutter curtain 1 in the fully closed posture does not rise. When it becomes necessary to open the shutter for reasons such as maintenance, a generator G is prepared and connected to the connector C1 so that the generator G can be used as a temporary power supply to supply electricity to the switch M. By supplying it, the opening/closing machine M can be driven, and the shutter is opened by pressing the open switch U.

When lowering the shutter curtain 1 that has been raised using the generator G as a temporary power supply, the shutter curtain 1 can be lowered by operating the manual closing device, and an obstacle is detected while the shutter curtain 1 is lowering. In this case, the shutter curtain 1 is stopped by the mechanical stopping means (mechanical return of the brake release lever ML), and when the obstacle non-detection state is established, the stopped shutter curtain 1 is lowered again by the dead weight re-lowering means. fully closed. When the shutter curtain 1 is lowered by its own weight during inspection, instead of the manual closing device, the shutter curtain 1 may be lowered by its own weight using a pseudo signal generated by pressing the operation button of the disaster prevention panel, or the brake may be released. The shutter curtain 1 may be lowered by its own weight by directly operating the lever.

In this embodiment, the shutter device is not connected to a commercial power source, and the generator can be easily connected only when the shutter is opened. It is possible to reduce the cost of laying work. In this embodiment, if there is a generator or a power outlet, the shutter device (not connected to the commercial power supply and not equipped with a battery), which is normally used in a fully closed state, can be electrically opened. It is also possible to electrically open a plurality of shutter devices using one portable generator. Further, since the shutter device according to the present embodiment is provided with a mechanical safety device, it is possible to detect an obstacle even if it is not normally connected to a power source and does not have a battery. It is possible, and re-descent after obstacle removal is possible.

In both the first embodiment shown in FIG. 45 and the second embodiment shown in FIG. 45A, the electric wire EW1 for supplying electric power to the opening/closing machine M extends to a lower portion of the skeleton through the skeleton. has a connection part (connector C1) that can be connected from the outside at the lower part, but the electric wire EW1 that supplies power to the switch M is connected to the outside at the upper part of the opening (for example, inside the shutter case or the ceiling). It may be provided with a connection part that can be connected from.

In the first embodiment shown in FIG. 45, the operation unit is an opening/closing operation unit (an opening/closing operation switch 100 including an open switch U, a close switch D, and a stop switch S), and in the second embodiment shown in FIG. 45A, the operation unit is an opening operation part (opening switch U), but the operation part may be, for example, a switch provided on the wire EW2, and when the connector C2 of the wire EW2 is connected to the connector C1 of the wire EW1, the switch is OFF. By turning on the switch, current is supplied to the switch M, and the shutter curtain 1 may automatically rise (the rising shutter curtain 1 is stopped at the fully open position by the limit switch). .

1 shutter curtain 3 guide rail 6 automatic closing device 10 operation box 10A first operation box 10B second operation box M opening/closing machine G generator C1 connection part (connector)
C2 Connection EW1 Wire EW2 Wire

Claims (12)

Left and right guide rails installed on the frame,
A shutter curtain that opens and closes the opening between the left and right guide rails,
an opener and
an operation unit;
A power supply that enables electric operation using the operation unit by supplying power to the switch,
an obstacle detection means for detecting an obstacle when the shutter curtain descends ;
stopping means for stopping the falling shutter curtain when an obstacle is detected;
a manual closing device;
an automatic closing device that lowers the shutter curtain by its own weight upon input of a fire detection signal or operation of the manual closing device;
In a shutter device comprising
The electric wire for supplying power to the switchgear has a connection part that can be connected from the outside,
The power source is a temporary power source connectable to the connecting portion, and the switch is normally not connected to any power source including the temporary power source,
The operation unit has an open switch and does not have a close switch, and when the temporary power supply is connected to the connection unit, only an electric opening operation from the operation unit is possible,
The stopping means is a mechanical stopping means that mechanically stops the shutter curtain that is falling under its own weight when an obstacle is detected, without using electric power, and an electrical stop means that electrically stops the shutter curtain that is motor-lowering when an obstacle is detected. no stopping means,
Closing of the opening is performed only by the shutter curtain falling by its own weight, and the electric lowering operation from the operation unit is regulated, and the shutter curtain that is falling can be stopped only by the mechanical stopping means when an obstacle is detected. can be,
The opening of the opening is performed by electrically raising the shutter curtain by connecting the temporary power supply to the connecting part and performing an electrically opening operation from the operation part.
shutter device. The electric opening operation is due to the opening switch push-off operation,
The shutter device according to claim 1. A wire for supplying electric power to the switch extends to a lower portion of the frame or a portion below the guide rail through the frame or the guide rail, and the wire is a connection that can be connected from the outside at the lower portion. has a department,
The shutter device according to claim 1 or 2. The temporary power supply is a portable generator or a power outlet that can be connected to the connection part,
The shutter device according to any one of claims 1 to 3. The lower portion is provided with the manual closing device and/or the operating portion, and the connecting portion is provided in proximity to either the manual closing device or the operating portion.
The shutter device according to any one of claims 3 and 4 (limited to claims dependent on claim 3) . The shutter device is normally used in a state where the opening is fully closed or in a state where the opening is fully open, and normally, no power supply is in a state capable of supplying power to the switch.
The shutter device according to any one of claims 1 to 5. The shutter device constitutes a partition wall in a warehouse or factory, and is normally used with the opening fully closed.
The shutter device according to any one of claims 1-6. A warehouse with a plurality of shutter devices,
The warehouse comprises an outer wall and a plurality of internal wall bodies,
A doorway is formed in the outer wall,
A plurality of openings are formed in the wall,
The entrance and exit can be opened and closed by an electric shutter device connected to a commercial power supply,
The plurality of openings are provided with a plurality of shutter devices capable of falling under their own weight , and some or all of the plurality of shutter devices are normally used in a fully closed state or a fully opened state. Thus, a desired section is formed in the warehouse, and the shutter device in the fully closed state or the fully opened state is not connected to any power source including the commercial power source, and electric operation is restricted. ,
The shutter device capable of falling under its own weight ,
left and right guide rails of the opening ;
a shutter curtain for opening and closing the opening ;
an opener and
an operation unit;
a manual closing device;
an automatic closing device that lowers the shutter curtain by its own weight upon input of a fire detection signal or operation of the manual closing device;
an obstacle detection means for detecting an obstacle when the shutter curtain descends;
a mechanical stopping means for mechanically stopping the shutter curtain that is falling under its own weight when an obstacle is detected, without using electric power;
an electrical stopping means for stopping the shutter curtain during motorized descent when an obstacle is detected;
with
The electric wire for supplying power to the switchgear has a connection part that can be connected from the outside,
By connecting a temporary power source to the connecting portion, electric power is supplied to the switchgear by the temporary power source, and electric opening and closing using the operation portion is possible ,
When opening a desired shutter device in a fully closed state , the temporary power supply is connected to the connection portion corresponding to the shutter device, and the shutter curtain is electrically raised by the opening operation from the operation portion,
When closing a desired shutter device in a fully open state , a temporary power source is connected to the connecting portion corresponding to the shutter device, and the shutter curtain is electrically lowered by the closing operation from the operation portion, or the shutter curtain is lowered by its own weight. let
Warehouse with multiple shutter devices. A warehouse with a plurality of shutter devices,
The warehouse comprises an outer wall and a plurality of internal wall bodies,
A doorway is formed in the outer wall,
A plurality of openings are formed in the wall,
The entrance and exit can be opened and closed by an electric shutter device connected to a commercial power supply,
The plurality of openings are provided with a plurality of shutter devices capable of falling under their own weight , and some or all of the plurality of shutter devices are normally used in a fully closed state or a fully opened state. Thus, a desired section is formed in the warehouse, and the shutter device in the fully closed state or the fully opened state is not connected to any power source including the commercial power source, and electric operation is restricted. ,
The shutter device capable of falling under its own weight ,
left and right guide rails of the opening ;
a shutter curtain for opening and closing the opening ;
an opener and
an operation unit;
a manual closing device;
an automatic closing device that lowers the shutter curtain by its own weight upon input of a fire detection signal or operation of the manual closing device;
an obstacle detection means for detecting an obstacle when the shutter curtain descends;
a mechanical stopping means for mechanically stopping the shutter curtain that is falling under its own weight when an obstacle is detected, without using electric power;
with
The electric wire for supplying power to the switchgear has a connection part that can be connected from the outside,
By connecting a temporary power source to the connecting portion, power is supplied to the opening and closing device by the temporary power source, and electric opening using the operation portion is possible ,
When opening a desired shutter device in a fully closed state , the temporary power supply is connected to the connection portion corresponding to the shutter device, and the shutter curtain is electrically raised by the opening operation from the operation portion,
When closing the desired shutter device in the fully open state , the shutter curtain is lowered by its own weight.
Warehouse with multiple shutter devices. A wire for supplying electric power to the switch extends to a lower portion of the frame or a portion below the guide rail through the frame or the guide rail, and the wire is a connection that can be connected from the outside at the lower portion. has a department,
A warehouse comprising a plurality of shutter devices according to any one of claims 8 and 9 . The temporary power supply is a portable generator or a power outlet that can be connected to the connection part,
A warehouse comprising a plurality of shutter devices according to any one of claims 8-10 . A self-weight lowerable shutter device provided in a warehouse comprising a plurality of shutter devices according to any one of claims 8 to 11.

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