JPS6317834Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a shutter device, and particularly to a shutter device that can be stored in a folded state without being rolled up when the shutter is stored.

This type of shutter device consists of a guide rail placed on both sides of an opening such as an entrance or window of a building, a plurality of slats connected to each other so as to be movable up and down and sequentially bendable along the guide rail, and the slats mentioned above. A storage box formed at the upper end of the guide rail, a chain provided within the storage box so as to engage with a rack formed on each of the slats to move the slats up and down, and by this chain. It is equipped with a support rail provided approximately horizontally within the storage box in order to suspend the lifted slats parallel to each other,
Below, an overview of this shutter device is shown in Figures 1 to 3.
The diagram will be explained.

In FIGS. 1 to 3, reference numeral 1 denotes a plurality of slats constituting a shutter unit for shielding an opening such as an entrance or a window of a building. Each slat 1 is constructed, for example, by attaching a horizontal frame 1a above and below a glass plate and a vertical frame 1b on the left and right sides.A shaft 2 is provided protruding from the upper side of the vertical frame 1b, and the slat 1 is attached to this shaft. The rollers 3 are moved along guide rails 4 installed on both sides of the opening. When supported by the guide rail 4, the slats are arranged in succession in the vertical direction so that the front surfaces of the slats are on the same plane, and when stored inside the storage box 5 connected to the upper end of the guide rail 4. They are placed side by side with each other. A shaft 6 is provided on the side surface of the upper end of the slat 1 parallel to the shaft 2.
One end of the connecting link 7 is attached to the connecting link 7, and the guide rod 8 provided at the other end of the connecting link is engaged in a longitudinal groove 9 formed in the adjacent slat to prevent it from coming out.
The slats 1 are connected to each other in a flexible manner.
Further, as shown in FIG. 1, each slat 1 has an engagement protrusion 10 having a semicircular cross section on the upper surface of the upper horizontal frame 1a, and an engagement convex portion 10 having a semicircular cross section on the lower surface of the lower horizontal frame 1a. When each slat 1 is arranged continuously in the vertical direction along the guide rail 4, the concave and convex portions 10 and 11 of adjacent slats engage with each other, eliminating the gap between the slats and also reducing the gap between the slats. This eliminates lateral displacement in the thickness direction.

The upper end of the guide rail 4 located within the storage box 5 is connected via an inclined rail 12 to a support rail 13 extending substantially horizontally. Therefore, each slat 1 is suspended and supported within the storage box 5 via rollers 3 that move on horizontal rails.

Inside the storage box 5 is an endless chain 1 that engages with a short rack 14 provided at the upper end of the slat 1 at a position facing the slat 1 supported at the upper end of the guide rail 4.
5 is arranged in a wound manner between an upper sprocket 16 and a lower bearing 17. This chain 15 functions to raise or lower the slat 1 when the sprocket 16 is rotated in one direction or the opposite direction by the power transmitted from the drive source 18 through the chain 19. The length of the chain 15 is chosen such that the rack 14 of one slat can engage the rack 14 of the succeeding slat 1 just before it leaves the chain. That is, at least one rack 14 of the slat 1 is always engaged with the chain 15.

Further, a pressing member 20, such as a leaf spring, having appropriate elasticity is provided at a corner portion where the upper end of the guide rail 4 moves to the inclined rail 12. This pressing member 20 is fixed at one end to the storage box side, and when each slat 1 reaches the uppermost end of the guide rail 4, the free end is connected to the channel material 32 and the bearings provided on the left and right sides of this slat 1. 33 and connects it to the support rail 13
It is located within the movement path of the bearing body 33 so as to be pressed in the direction of.

The operation of storing each slat 1 in the storage box 5 is performed by moving the chain 15 in a direction in which the portion located on the engagement surface rises. As the chain 15 travels, the slat 1 having the rack 14 engaged with the chain rises along the guide rail 4, and the storage box 5
go inside. Further, the lower slat 1 is also pulled up along the guide rail 4 together with this slat 1.

At the final stage when the slat 1 with the rack 14 engaged with the chain 15 enters the storage box 5, the dogleg-shaped protrusion of the slat connecting link 7 attached to the upper end of the adjacent succeeding slat 1 The portion 7a contacts a pressure roller 22 attached to the free end of an arm 21 pivoted within the storage box 5. Therefore, the slat 1 receives a pressing force acting in a direction perpendicular to its thickness direction via the connecting link 7, and is pushed forward and retreats out of the path of movement of the succeeding slat while being pushed up by the rising force of the succeeding slat. and moves onto the support rail 13 via the inclined rail 12.

As the trailing slat 1 rises, the guide rod 8 of the connecting link 7 attached to its upper end moves upward in the long groove 9 of the leading slat, and when it hits the upper end of this long groove, it rotates and moves the leading slat forward. Press to. As a result, the slat 1 smoothly transfers onto the support rail 13. This operation is repeated each time the connecting link 7 of the succeeding slat comes into contact with the pressing roller 22, and each slat 1 is successively suspended and supported from the support rail 13 via the roller 3.

Contrary to the above, the action of letting out each slat 1 is as follows:
This is done by running the chain 15 in the opposite direction to that described above. This results in chain 15
Slut 1 with an interlocking rack 14
descends along the guide rail 4. After the guide rod 8 provided at the free end of the connecting link 7 of the preceding slat reaches the lower end of the long groove 9 of the connecting slat, the following slat 1 is moved along the inclined rail 12 by the engagement between the guide rod and the lower end of the long groove. Then, the slat 1 is pulled out onto the guide rail 4, and the rack 14 of the pulled out slat 1 is engaged with the chain 15. During this drawing process, the roller 3 is forcibly moved onto the guide rail 4 as the slat 1 moves, so there is no fear that the pressing member 20 will interfere with the slat drawing out operation. Note that when the roller 22 is pressed downward by the protrusion 7a of the link 7 when the slat is lowered,
The arm 21 has a first axis with its mounting shaft 21a as a fulcrum.
It is configured to rotate in the direction indicated by the arrow in the figure and retreat the pressing roller 22 from the moving path of the link 7.

As mentioned above, the slat is raised and lowered to open and close the opening, but when the slat is lowered, (1) there is an obstacle in the lowering position of the slat, or (2) the slat becomes abnormal due to damage to other parts. (3) If the program limit switch, which is integrated with the drive source and detects the rotation speed of the drive source and determines when the slat is raised and when it is lowered, goes out of order. This causes slack in the chain that raises and lowers the slats, and if the lowering operation continues, it will cause great damage to the slats.

The object of the present invention is to automatically stop the lowering operation of the slats when the above-mentioned situation occurs, thereby preventing damage to the slats, etc.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 4 to 7, in which the same members as in FIGS. 1 to 3 are given the same reference numerals. Note that the drawing shows only the lower bearing part that suspends the chain. A column 23 is provided in the storage box 5 in parallel with the guide rail 4,
A U-shaped metal fitting 24 is attached to the lower end of this column to form a bearing storage space 25 in which the chain 15 is suspended. The bearing 17 is a U-shaped metal fitting 26
The bearing shaft 17a is disposed between both legs of the
are attached to both leg pieces via spacers 27. This U-shaped metal fitting 26 has the above-mentioned shaft 17a.
A switch operating rod 28 is installed perpendicular to the
A U-shaped metal fitting 26 is disposed in the space 25, and both ends of the bearing shaft 17a face the column 23 and the U-shaped metal fitting 24 through vertically elongated holes 2.
9 and 30, the switch operating rod 28 passes through the leg of the U-shaped metal fitting 24 and engages the limit switch 31 attached to the column 23.
-L (31-R on the right side is shown only in the circuit diagram) is in contact with the opening/closing member 31a. Above switch operation rod 2
8 is fitted with a compression coil spring 32, and the elastic restoring force of this spring presses the U-shaped metal fitting 26 in the direction indicated by the solid line arrow to constantly apply tension to the chain 15.

FIG. 7 shows an embodiment of the connection circuit for the limit switch described above, in which limit switches 31-L and 31-R provided on both the left and right sides of the opening are connected in series, and a program limit switch is connected to this in series.
Normally closed contact PLS-C of PLS, normally closed contact RU-O of relay RU installed in the slat lifting circuit, relay
RD, manual operation button switch PBS-D, and the above relay RD's self-holding normally open contact RD-O2 are connected in series to form a relay circuit that closes the motor circuit for lowering the slat. are doing. In addition, the relay circuits that close the motor circuit for pulling up the slats are also 31-L and 31-R.
The structure is the same except for

The embodiment of the present invention has the above-mentioned configuration, and its operation will be explained below. Normally, tension is applied to the chain 15 by the compression coil spring 32 as described above. In this state, when the lowering pushbutton switch PBS-D is closed to lower the slat 1 and close the opening, the stop pushbutton switch PBS-S → the lowering pushbutton switch
PBS-D → Relay RD → Normally closed contact RU of relay RU
-O→Limit switch 31-L→Same 31-R→
The relay circuit of program limit switch RLS-C closes and energizes the relay RD. By energizing the relay RD, the normally open contact RD-O1 of the relay RD provided in the motor circuit is closed, and the motor 18 is operated to move the chain 15 in the direction of the arrow in FIG. lower it.

During this descent, due to some reason, the slat 1
When the chain 1 stops descending, the pulling side of the slat 1 in the chain 1 becomes slack, and the opposite side becomes tense, causing the U-shaped metal fitting 26 bearing the bearing 17 to move against the coil spring 32. Therefore, the switch operating rod 28 moves in the direction indicated by the chain line arrow in FIGS. 4 and 5, and the opening/closing member 31a of the limit switch 31-L
Push and move to open the limit switch 31-L. As a result, the motor circuit is also opened at the same time as the relay circuit is opened, and the motor 18 is stopped to stop the lowering operation of the slat.

Note that the bearing 17 may be a sprocket.

As described above, the present invention is designed to automatically detect when the slat stops descending due to some reason and stop the motor as a drive source to interrupt the descending operation. This has the effect of preventing damage to the slats, etc.

It should be noted that the embodiment shown in the drawings operates only when the slat is lowered, and only the lowering operation is stopped.
This means that the percentage of problems that occur during shutter operation is
This is because most of the cases involve pulling down, and also because even if an abnormality occurs during lowering and the lowering operation is stopped, if the lifting operation is possible, it is convenient for recovery work from abnormal situations. However, even in the case of pulling up, by configuring the same circuit as in the case of pulling down separately or at the same time as the pulling side, it is possible to use the same circuit as in the case of pulling down when the slat moves abnormally due to damage to parts etc. It can be made to work.

BC in Fig. 7 is a non-excitation operated electromagnetic brake. The electromagnetic brake mentioned above acts to prevent the slats from being pushed up by external force such as human power, and when the slats are not being lifted or lowered,
The circuit is configured such that the electromagnetic brake is released by the action of an electromagnet.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of the main parts showing one embodiment of the shutter device of the present invention, Fig. 2 is a front view of the slat connecting part, Fig. 3 is a side view thereof, and Fig. 4 is a chain suspension bearing. 5 is a side view thereof, FIG. 6 is a bottom view of FIG. 4, and FIG. 7 is an electric circuit diagram for controlling the chain drive motor. 1... Slut, 2... Shaft, 3... Roller, 4
...Guide rail, 5...Storage box, 6...
Shaft, 7...Link, 8...Guide rod, 9...Long groove, 10...Engagement protrusion, 11...Engagement recess, 12
... Inclined rail, 13 ... Support rail, 14 ...
Rack, 15...Chain, 16...Sprocket, 17...Bearing, 18...Motor as a driving source, 19...Chain, 20...Press member, 21...Arm, 22...Press roller, 23
...Column body, 24, 26...U-shaped metal fitting, 25...
Bearing storage space, 27... Spacer, 28...
...Switch operating rod, 29, 30...Elongated hole, 31...
...Limit switch, 32...Channel material, 3
3...Bearing body, PLS...Program limit switch, RU, RD...Relay, PBS...Push button switch.

Claims (1)

[Scope of utility model registration request] a guide rail arranged on both sides of the opening, a plurality of slats connected to each other so as to be movable up and down and sequentially bendable along the guide rail, and a storage box formed at the upper end of the guide rail; A chain is provided in the storage box so as to engage with a rack formed on each of the slats to move the slats up and down, and a chain for suspending the slats pulled up by the chain parallel to each other. A shutter device comprising: a support rail provided substantially horizontally within the storage box; a bearing body for pivotally supporting the winding bearing shaft or sprocket shaft of the chain; A support member that supports the shaft so as to be slidable in a direction perpendicular to the axis of the shaft, a coil spring that presses the bearing shaft or sprocket shaft in a direction perpendicular to the axis to apply tension to the chain, and a pressing force by the coil spring. A switch operating member is provided on the bearing body to operate a switch attached to the support member when the bearing body moves in the opposite direction, and the drive motor of the chain is stopped by the operation of the switch. A shutter device equipped with an electric circuit for