JPH0725428Y2 - Shutter curtain fall prevention device for building shutters - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] In the present invention, a shutter curtain is constructed by flexibly connecting panel-shaped slats, and can be stored in a storage rail arranged along the ceiling. The present invention relates to a shutter curtain fall prevention device for building shutters.

[Prior Art] In some building shutters, a shutter curtain is configured by flexibly connecting panel-shaped slats, and the shutter curtain is stored along substantially the ceiling when the shutter is open.

As shown in FIG. 3, this is continuous with the elevating guide rails 1 provided on both sides of the entrance and exit, and the storage guide rails 2 are provided along the ceiling, and both guide rails 1 and 2 are provided. The roller 4 mounted on the shutter curtain 3 is rotatably fitted therein, and the shutter curtain 3 can be moved up and down along the guide rails 1 and 2 and stored.

Reference numeral 5 in FIG. 3 denotes an opening / closing mechanism. The opening / closing mechanism 5 rotates a drum 6 by a motor to wind the wire 7 attached to the shutter curtain 3 onto the drum 6 and feed it out to open / close the shutter. It is something to do.

[Problems to be Solved by the Invention] In the opening / closing mechanism described above, the wire is wound and forcibly opened when the shutter is open, but when the shutter is closed,
The wire is unwound and closed using the dead weight of the shutter curtain.

In some of the above shutters for buildings, the storage rail portion is horizontal due to the structure of the ceiling or the like.

Generally, even if the storage rail portion 1 is horizontal, the lowermost slat 8 is separated from the storage guide rail portion 2 so that the shutter curtain 3 is subjected to its own weight in the descending direction in the storage state (see FIG. 2). )It has become. Therefore, normally, the shutter curtain 3 is opened and closed by winding the wire 7 and unwinding it.

However, if the storage guide rail 2 is horizontal,
Compared to the total weight of the shutter curtain 3, the descent force tends to be small in the initial state of closing, and when the guide rail becomes old and the movement of the roller 4 is not smooth, the shutter curtain may not descend. If the motor continues to be driven without the shutter curtain descending, the wire will be loosened.

In this state, if the shutter curtain begins to descend at some time, it will be in a state of free fall, which is very dangerous, and the wire may be broken by an impact.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to immediately stop the driving of the motor and prevent the wire from being fed out when the shutter curtain does not start to descend due to the shutter closing operation.

[Means for Solving the Problems] In the present invention, a guide rail portion for storage is provided continuously with a guide rail portion for raising and lowering a shutter curtain along the ceiling,
In a building shutter in which the shutter curtain is stored along the ceiling when the shutter is opened, a detector that detects the storage state of the shutter curtain,
A shutter opening / closing switch, a motor for opening / closing the shutter,
A shutter opening / closing drive circuit is provided, and when the shutter close switch is operated, the power supply to the motor is stopped when the detector detects the stored state of the shutter curtain after a lapse of a predetermined time. To do.

[Operation] When the shutter close switch is operated to supply power to the motor for a predetermined time and the shutter curtain does not descend within that time,
This is the case when there is an abnormality in the shutter curtain, and the detector detects that the shutter curtain does not descend, and stops the power supply to the motor. This prevents the shutter curtain from freely descending at an unexpected time.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, the same components as those shown in FIG. 3 are designated by the same reference numerals. Further, in the figure, 10 is a motor for rotating the drum 6, and 11 is a limit switch.

The limit switch 11 is provided in the vicinity of the terminal end of the storage guide rail portion 2 so that the uppermost end of the shutter curtain 3 comes into contact with the limit switch 11 to operate at the final storage position of the shutter curtain 3. There is. When the shutter curtain 3 reaches the final storage position, an upper limit switch (not shown) operates, and when the shutter curtain reaches the final closed position, a lower limit switch (not shown) operates to stop the motor. ing.

In this embodiment, when the motor 10 is driven by pressing the close button to close the shutter, if the limit switch 11 becomes inoperative, the motor 10 is continuously driven and the motor 10 is driven.
If the limit switch 11 does not become inoperative despite the driving of the motor, the motor 10 is stopped after a lapse of a predetermined time to prevent the wire 7 from slackening.

Next, a detailed description will be given with reference to FIG.

To the power supply 12, the closed contact 13b of the timer 13 and the closed contact 14b of the stop push button are connected in series, and the closed contact 14b and the open contact of the open push button are connected.
15a, a rising relay 16, a closing contact 17b of the lowering relay 17, and a closing contact 18b of the upper limit switch and the closing contact 14b of the stop push button and the opening contact 19a of the closing push button 19a of the lowering relay 17, the rising relay 16 Connection is made via the closed contact 16b and the lower limit switch closed contact 20b.

Further, the open contact 16a of the ascending relay 16 is connected in parallel to the open contact 15a of the open push button, and the open contact 17a of the descending relay 17 is connected in parallel to the close push button open contact 19a.

Further, an open contact 11a of the limit switch 11 and a timer 13 are connected in parallel with the descending relay 17, the ascending relay closing contact 16b and the lower limit limit switch closing contact 20b.

The motor 10 is an open contact 16 of the ascending relay 16 connected in parallel.
c, it is connected to the power source 12 via the closing contact 17c of the descending relay 17.

The operation will be described below.

First, the opening operation will be described.

When the open push button is pressed, the open contact 15a closes, the closed contacts 13b and 14b, the open contact 15a, the up relay 16, the down relay closed contact 17b, and the upper limit switch closed contact 18b are energized, and the motor 10 is supplied via the open contact 16c. When power is supplied, the motor 10 rotates to wind the wire and open the shutter. At this time, the lift relay 16 is excited to close the open contact 16a, and even if the open push button is released, the upper limit switch operates and the motor 10 rotates until the upper limit switch closed contact 18b opens.

If it is desired to stop the motor 10 on the way, the stop push button may be pressed to open the closed contact 14b.

Next, the closing operation will be described.

When the close push button is pressed, the open contact 19a closes, the close contacts 13b, 14b, the open contact 19a, the descending relay 17, the descending relay close contact 16b, and the lower limit switch closing contact 20b are energized, and the motor 10 is supplied via the open contact 17c. Power is supplied, the motor 10 rotates, the wire is fed, the shutter curtain 3 descends by its own weight, and the shutter is closed. Energization of the motor 10 is maintained by closing the open contact 17a.

When the shutter is completely closed, the lower limit switch operates, the lower limit switch closing contact 20b opens and the motor 10 stops.

At the start of this closing operation, the limit switch 11
The open contact 11a is closed, and the timer 13 is energized by pressing the close push button, but when the shutter curtain immediately descends, the open contact 11a opens before the timer 13 operates,
The closing operation is performed without any trouble.

Next, if the shutter push-button is pressed but the shutter curtain does not descend, the timer 13 operates after a lapse of a predetermined time, the closed contact 13b opens, and the power supply to the motor 10 is stopped. Then, the motor 10 also stops.

As described above, in the present embodiment, the motor 10 is driven only when the shutter curtain normally descends even if the closing push button is pressed, and the motor is not driven when the shutter curtain descends abnormally.

It should be noted that in the above-described embodiment, various types such as a limit switch, a proximity sensor, and a photoelectric switch may be used to detect the final stored state of the shutter curtain. It is also possible to determine by doing.

[Effect of the Invention] As described above, according to the present invention, when the shutter curtain is not normally lowered, the motor is stopped, so that the shutter curtain suddenly lowers or the impact of the free fall of the shutter causes the wire. Is prevented from breaking,
The safety is improved and the accidental damage to the shutter curtain is prevented.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is an explanatory view of the same embodiment, and FIG. 3 is an explanatory view of a conventional example. Reference numeral 1 is a lifting guide rail portion, 2 is a storage guide rail portion, 3 is a shutter curtain, 10 is a motor, 11 is a limit switch, and 13 is a timer.

Claims (1)

[Scope of utility model registration request] 1. A building in which a storage guide rail portion is provided along a ceiling and is continuous with a lift guide rail portion of a shutter curtain, and the shutter curtain is stored along the ceiling when the shutter is opened. The shutter for a vehicle is provided with a detector for detecting the storage state of the shutter curtain, a shutter opening / closing switch, a motor for opening / closing the shutter, and a shutter opening / closing drive circuit, and a predetermined time has elapsed when the shutter closing switch is operated. A shutter curtain fall prevention device for a building shutter, characterized in that the power supply to the motor is stopped when the detector detects the retracted state of the shutter curtain.