JP6006844B2 - Shutter device - Google Patents

Description

The present invention relates to a shutter that releases a brake and lowers a shutter curtain by its own weight.

In the fire shutter, an automatic closing device is actuated by a signal from the disaster prevention panel to release the brake, and the shutter curtain is lowered by its own weight to close the opening of the building. In addition, the self-weight drop type shutter includes a manual type shutter that manually lowers the weight of the shutter curtain. Such a self-weight descent shutter is provided with a so-called evacuation stop device in order to prevent an evacuee from being caught by a shutter curtain that descends its own weight.

The automatic closing device is operated by energization from the emergency power supply (DC24V) to electrically release the brake, and the evacuation stop device has a seat plate switch provided at the lower end of the shutter curtain, and the shutter curtain descending The seat plate switch detects that an obstacle has hit the seat plate at the lower end, and the automatic closing device electrically cuts off the power to maintain the brake in the released state, thereby returning the brake and the winding shaft Stops the descent of the shutter curtain. An electric control type stop device is described in Patent Document 1, for example. However, the electric control method requires electric work in addition to the shutter work, which requires a large amount of work, and it is difficult to retrofit the existing manual shutter with an emergency stop device.

There has also been proposed a device for mechanically stopping a shutter curtain that descends its own weight. Patent Document 2 discloses a fire shutter that lowers its own weight on a shutter curtain, wherein the automatic closing device has an operating part that moves from a standby position to an operating position in response to a signal from a disaster prevention panel to release the brake. A wire extending in the vertical direction in the rail and having a lower end fixed to the lower portion of the guide rail and an upper end connected to the operating portion is disposed, and an obstacle detection member is provided at the lower end of the shutter curtain. The obstacle detection member is provided with means for pulling the wire in connection with the obstacle detection member moving upward while being in contact with the obstacle, and the obstacle detection member is in contact with the obstacle. In this case, the wire is pulled to move the operating portion to the standby position side to return the brake, and after the obstacle is removed, the obstacle detection member moves downward to remove the wire. The pull is released Safety device in fire shutter, characterized in that the actuating portion releases the brake by moving the operating position, is disclosed. However, in this case, the wire, which is an essential component of the safety device, extends into the guide rail, so that the work of attaching the wire is complicated and the end of the shutter curtain contacts the wire when the shutter curtain is raised and lowered. There is also a risk of scratching the wire. When the brake is restored, a predetermined tension acts on the return wire, so that it is necessary to avoid the strength of the wire from deteriorating and decreasing.
JP 2001-254580 A JP 2000-96961 A

An object of the present invention is to mechanically return the brake without performing electrical control and to prevent the return wire from being damaged as much as possible.

The present invention provides a shutter that releases a brake and lowers its own weight by releasing a brake.
An actuating means for moving in a first direction to release the brake and for moving in a second direction opposite to the first direction to return the brake;
A return wire coupled to the actuating means to move the actuating means in a second direction;
A winding device that is provided above the opening and has a built-in means for energizing the return wire in the winding direction, and winds up the other end of the return wire;
With
The return wire extending from the actuating means is provided with a first part on the actuating means side and a second part on the take-up apparatus side by being folded back via the seat plate and wound on the take-up device, and a shutter curtain The first portion and the second portion of the return wire drawn out from the winding device as the dead weight of the wire is extended extend outside the guide rail and exposed to the opening along the shutter curtain surface portion. And
The seat plate is composed of an upper seat plate and a lower seat plate that can move relative to the upper seat plate,
When the lower seat plate at the lower end of the shutter curtain that falls under its own weight hits an obstacle, the return wire is regulated in conjunction with the upward movement of the lower seat plate. The first portion of the wire moves the actuating means in the second direction due to the falling weight of the shutter curtain to return the brake;
Shutter device.

In one aspect, after the obstacle is removed, the return wire can be pulled out, and the shutter moves again in the first direction to release the brake, so that the shutter curtain is lowered again by its own weight. .

In one embodiment, a delay mechanism is provided that delays the release of the brake that has returned by obstacle detection after the obstacle has been removed.

In one aspect, the return wire is wound around a rotating pulley provided at a portion other than the end of the seat plate of the seat plate at the lower end of the shutter curtain, and is turned back.
The portion and the second portion extend along the shutter curtain surface portion with the rotating pulley interposed therebetween.

In one aspect, the rotation of the rotating pulley stops in conjunction with the upward movement of the lower seat plate,
The withdrawal of the return wire is restricted.

In the present invention, since a mechanical stop is performed at the time of evacuation, electricity is not required, retrofitting to an existing manual shutter is easy, and there is no cost for electricity. Furthermore, since no electrical parts are used, the evacuation stop device of the present invention can be employed for shutters installed in warehouses or factories that handle highly ignitable items. Since the return wire extends along the shutter curtain surface portion as the shutter curtain is lowered by its own weight, it is possible to prevent the return wire from being damaged as much as possible.

In the invention described in claim 3, the evacuee can evacuate smoothly after the obstacle is removed.

Embodiments of the present invention will be described with reference to the drawings. The shutter device includes a shutter curtain 1 that closes the opening, a winding shaft 2 that is positioned above the opening and winds the shutter curtain 1, and guide rails 3 that are erected on both left and right ends of the opening. I have. The shutter curtain 1 is configured by connecting a plurality of slats 1a up and down, and a seat plate 4 at the lower end.
Is provided. The seat plate 4 has a long upper seat plate 4a extending in the width direction of the opening, and a long lower seat that is suspended below the upper seat plate 4a so as to be vertically movable relative to the upper seat plate 4a. It consists of a seat plate 4b, and the seat plate 4 constitutes an obstacle detection means. In normal times, the shutter curtain 1 is opened and closed by an opening / closing machine 5.

The shutter curtain 1 is wound around the take-up shaft 2 in a state in which the shutter curtain 1 is lowered by a brake constituting the opening / closing machine 5, and the automatic closing device 6 is activated by a fire detection signal from the disaster prevention panel. Then, the brake is released via the brake release device 7. When the brake is released, the shutter curtain 1 itself and the weight of the seat plate 4 provided at the lower end of the shutter curtain 1 are lowered by their own weight while being guided by the groove of the guide rail 3 at both ends in the width direction. Is fully closed.

The brake release lever 8 protrudes from the brake case of the opening / closing machine 5, and the brake that restricts the rotation of the winding shaft 2 is released by moving the brake release lever 8.
A switch including a brake and a brake release lever for releasing the brake are known,
For example, it is described in FIG. Specifically, the brake means has two brake plates that are slidably opposed to each other. When the shutter curtain is housed, the brake plates are pressed against each other by an urging means such as a spring, and the brake works and winds. The rotation of the intake shaft is restricted. By swinging the brake release lever against the spring, the brake plates are separated from each other and the brake is released, the winding shaft can be rotated, and the shutter curtain is lowered by its own weight. If the brake release lever is made free, the brake plates are pressed against each other by the spring as the biasing means, and the brake and the brake release lever are automatically returned.

The brake release device 7 is provided with an operating means for moving the brake release lever 8 in the brake release direction. When the fire detection signal is input to the automatic closing device 6, the automatic closing device 6 operates the brake releasing device 7. The means moves to move the brake release lever 8. In a specific example, the actuating means is connected to the movable part of the automatic closing device 6 by the brake release wire W1, and when the fire detection signal is input to the automatic closing device 6, the movable part of the automatic closing device 6 is The brake release wire W1 is pulled by moving, and the operating means of the brake release device 7 moves to the automatic closing device 6 side. Then, the operating means moved to the automatic closing device 6 side moves the brake release lever 8 to release the brake. The brake release wire W1 extends in the outer cable.

In the automatic closing device 6, the movable part is operated by the input of the fire detection signal from the disaster prevention panel, and the brake releasing wire W <b> 1 is pulled to move the brake releasing lever 8 through the operating means to release the brake. There are several known ways in which the automatic closing device 6 pulls the brake releasing wire W1. The automatic closing device 6 pulls the brake releasing wire W1 by the spring force of the spring built in the automatic closing device 6, Brake release wire W with built-in motor driving force
One that subtracts 1 is listed. The specific configuration of the automatic closing device 6 is not limited as long as the automatic closing device 6 moves the brake releasing lever 8 by moving the operating means of the brake releasing device 7. In the illustrated example, the automatic closing device and the brake releasing device are configured separately, but a brake releasing device integrated with the automatic closing device may be used. The automatic closing device may be as described in Patent Document 1.

A specific configuration of the brake release device 7 will be described with reference to FIGS. 4 to 6. FIG.
The shutter release state, that is, the brake return state is shown, and the arrow direction is the brake release direction. FIG. 5 shows a state in which the shutter curtain is descending, that is, a brake release state. In the drawing, the arrow direction is the brake return direction. FIG. 6 shows a state where the lower seat plate hits an obstacle during the weight drop and the lock mechanism is activated and the brake return wire is pulled, that is,
The brake return state is shown. In the figure, the “left side” is the “automatic closing device side”, the direction toward the left side is the “brake release direction”, and the direction toward the right side is the “brake return direction”.

The brake release device 7 includes a frame 70 that is attached to the outside of the opening / closing machine 5 corresponding to the brake case of the opening / closing machine 5. The frame 70 includes an upper wall 700 and side walls 701 and 702 extending vertically from left and right end portions of the upper wall 700, and a guide shaft 71 extending horizontally between the opposing side walls 701 and 702. Is provided. The upper wall 700 is formed with an opening for receiving the tip portion of the brake release lever 8 so as to be movable in the left-right direction. The tip portion of the brake release lever 8 is inserted into the frame 70 through the opening of the upper wall 700. It is extended. The frame 70 is provided with a lower surface cover 703 and side surface covers 704 and 705, and is formed in a box shape as a whole.

A first operating body 72 and a second operating body 73 as operating means are provided on the guide shaft 71 so as to be slidable in the left-right direction. The first actuating body 72 has a U-shape in a side view from a bottom 720 extending horizontally and side sides 721 and 722 rising vertically from the left and right ends of the bottom side. 721 and 722 are formed with insertion holes through which the guide shaft 71 is inserted.
The second actuating body 73 has a U-shape in a side view from a bottom 730 extending horizontally and side sides 731 and 732 rising vertically from the left and right ends of the bottom 730, and Side 7
31 and 732 are formed with insertion holes through which the guide shaft 71 is inserted. First operating body 72,
The second operating body 73 is attached to the guide shaft 71 so that the bottom 730 of the second operating body 73 overlaps the bottom 720 of the first operating body 72. In the illustrated example, the bottom 720 of the first operating body 72 is shown.
And the bottom side 730 of the second operating body 73 are substantially the same in the left-right direction.

4 to 6, the right side 722 is narrower than the width of the left side 721 of the first operating body 72. More specifically, the right side 722 is the first side
Both ends of the operating body 72 in the width direction are notched and only the central portion is left, so that the operating body 72 is formed with a narrow width. The left side 721 of the first operating body 72 has a size larger than the width of the left side 731 of the second operating body 73, and the second side 721 of the first operating body 72 has a second side 721. An end portion of the brake release wire W1 is fixed to a portion protruding from the left side 731 of the operating body 73. Second
The left side 731 of the operating body 73 has a larger rising dimension (height) than the other sides, and is positioned on the right side of the brake release lever 8 protruding into the frame 70 so as to face. Yes. That is, the side 731 and the automatic closing device 6 are located on the opposite side with the brake release lever 8 in between, and the side 731 located on the right side of the brake release lever 8 moves toward the left side to release the brake. The lever 8 is moved to the left side (the automatic closing device side).

The right side portion of the bottom side 730 of the second operating body 73 is cut out in a rectangular shape so as to leave both end portions in the width direction. On the right side 732 of the second operating body 73, a return wire for brake return (first
The end of the wire W2) is fixed. The width dimension of the second actuating body 73 is substantially the same as the width dimension of the first actuating body 72, and the right side of the first actuating body 72 from the notch formed in the right side portion of the bottom 730 of the second actuating body 73. The narrow side 722 is located inside the right side 732 of the second operating body 73 and protrudes. A distance D1 between the edge 733 of the cutout portion of the second operating body 73 and the right side 722 of the first operating body 72 determines the moving stroke of the second operating body 73 relative to the first operating body 72. .

A coil spring 74 is wound around the guide shaft 71. The left end portion of the coil spring 74 is in contact with the left side portion 731 of the second operating body 73, and the right end portion of the coil spring 74 is the first operation. It is in contact with the right side 722 of the body 72. In the state where the coil spring 74 is attached to the guide shaft 71 so that the bottom 730 of the second operating body 73 overlaps the bottom 720 of the first operating body 72, the right end of the coil spring 74 is the first operating body 72. The left end of the coil spring 74 is in contact with the right side 722 and acts to press the left side 731 of the second operating body 73 against the left side 721 of the first operating body 72.

FIG. 4 shows a state in which the brake release lever 8 is free, and the brake is effective. When the brake release wire W1 is pulled in the direction of the arrow by the automatic closing device 6 from the state of FIG. 4, the left side 721 of the first operating body 72 is pulled and moved toward the automatic closing device, and at the same time, the first operating body. The right side 722 of 72 moves to the automatic closing device side, so that the second side via the coil spring 74 is
The operating body 73 moves to the automatic closing device side, and the upper end portion of the left side 731 of the second operating body 73 comes into contact with the brake release lever 8 to move it, thereby releasing the brake. FIG. 5 shows a state in which the brake is released.

When the return wire is pulled in the direction of the arrow from the state of FIG. 5, the right side 732 of the second operating body 73.
At the same time, the right side 731 of the second operating body 73 moves away from the brake release lever 8 while compressing the coil spring 74 to release the brake release lever 8 and The brake and brake release lever 8 is returned by the built-in return means. Since the force necessary for returning the brake is determined by the coil spring 74, the return wire may be pulled with a constant force, and the brake can be stably returned.

Thus, when the brake is returned by pulling the return wire (first wire W2), the first
There is no need to move the operating body 72. Therefore, when the brake release wire W1 connected to the first operating body 72 is pulled by the strong spring of the automatic closing device 6 (in the illustrated example, the force to pull the brake release wire W1 is greater than the force of the coil spring 74). Or after the brake is released, even if the brake release wire W1 is connected to a ratchet mechanism built in the automatic closing device 6 or a fixed motor shaft, etc. When the brake is returned by pulling the one wire W2), the components of the automatic closing device 6 are not affected at all.

The return wire is composed of a first wire W2 and a second wire W3. First wire W2
And the second wire W3 are connected via a wire repeater 9. One end of the first wire W <b> 2 is connected to the operating means of the brake release device 7, and the other end is connected to the wire relay 9. First
The wire W2 extends in the outer cable. One end of the second wire W3 is connected to the wire repeater 9, and the other end is connected to a rotating drum 10 provided on the seat plate 4 so as to be wound. The rotary drum 10 incorporates a spring, and biases the other end of the second wire W3 in the direction of winding the rotary drum 10 around the rotary drum 10. In the figure, reference numeral 14 denotes a wire over-winding prevention stopper.

The wire repeater 9 is provided directly above the rotary drum 10 and above the opening. As shown in FIG. 9, the wire repeater 9 is located above the opening and extends in the front-rear direction (the depth direction of the shutter housing 15), and on the front side (the lintel side above the opening). A guide roller 90 is provided for guiding the second wire W3 guided up and down along the shutter curtain 1 in the horizontal direction toward the rear, and one end side of the second wire W3 and the other end side of the first wire W2. Are connected via a slider 91 of the wire repeater 9 (slidable in the front-rear direction). The roller support member 92 provided with the guide roller 90 is a long member extending in the front-rear direction, and is fixed to the bracket 93 so that the position can be adjusted in the front-rear direction. FIG. 9 shows the positions of four different guide rollers 90. By fixing the roller support member 92 so that the position can be adjusted,
The distance between the second wire W3 that hangs down while being guided by the roller 90 and the surface portion of the shutter curtain 1 can be adjusted.

As shown in FIG. 10, the rotating drum 10 has a lower half portion located in the upper seat plate 4a, an upper half portion protruding upward from the upper seat plate 4a, and is provided in an inclined shape as a whole. In the upper plate 4a,
An opening is formed so that the rotating drum 10 can be inserted, and a cover body 100 is provided so as to cover the upper half of the rotating drum 10 protruding from the upper seat plate 4a. The upper wall of the cover body 100 includes a resin guide 100a through which the second wire W3 is inserted. 11 to 13
Then, the cover body 100 is omitted except for the upper wall.

When the brake is released and the shutter curtain 1 starts to descend by its own weight, the rotating drum 10 provided on the seat plate 4 also descends as the seat plate 4 descends.
The wire W3 is pulled out by the distance of the descent of the shutter curtain 1 as the rotating drum 10 rotates. The force of pulling out the second wire W3 due to the weight drop of the shutter curtain 1 is greater than the force of the spring spring that biases the second wire W3 in the winding direction, and the first wire W2 is not pulled at this time. Since the force of the coil spring 74 of the actuating means is greater than the force of the mainspring spring, the second actuating body 73 is not pulled in the return direction at this time. Moreover, the force with which the automatic closing device 6 pulls the brake release wire W1 is larger than the force of the spring spring.

The seat plate 4 is provided with a lock mechanism that restricts the rotation of the rotary drum 10. The locking mechanism
When the seat plate 4 at the lower end of the lowering shutter curtain 1 comes into contact with an obstacle, the lower seat plate 4b is configured to operate in conjunction with the upward movement relative to the upper seat plate 4a. Yes. When the rotation of the rotating drum 10 is stopped, the drawing of the second wire W3 is restricted and the length of the second wire W3 becomes constant. When the seat plate 4 (that is, the rotating drum 10) is lowered in this state, the second wire W3, The first wire W2 is pulled through the slider 91 of the wire repeater 9, the operating means moves in the brake return direction, the brake release lever 8 returns, the brake returns, and the rotation of the winding shaft 2 is restricted. Then, the descent of the shutter curtain 1 stops. Here, in order to return to the brake, it is necessary to pull the return wires (the first wire W2 and the second wire W3) by a predetermined amount (that is, the shutter curtain 1 needs to be lowered by a predetermined amount) and hit an obstacle. It is desirable that the lower seat plate 4b has an upward movement stroke corresponding to the amount of lowering of the shutter curtain 1 that only causes the brake to return. Alternatively, even if the upward movement stroke of the lower seat plate 4b is small, it is positioned in the middle of the return wire (for example, the wire repeater 9) or the connecting portion between the return wire (first wire W2) and the operating means. The brake can be returned by providing a mechanism (for example, a link mechanism) that extracts the pulling amount of the actuation means that is large with respect to the upward stroke of the second wire W3.

The lock mechanism will be described. The locking mechanism includes a rotating lock member 11 including a large number of tooth-like locked portions 10a formed continuously around the periphery of the rotating drum 10 and locking claws 11a that can be locked to the locked portions 10a. And. The rotation lock member 11 rotates in conjunction with the lower seat plate 4b moving upward relative to the upper seat plate 4a, with the lower end of the shutter curtain 1 being lowered in weight contacting the obstacle. The locking claw 11a of the rotation lock member 11 is engaged with the locked portion 10a of the rotary drum 10 to be locked, and the rotation of the rotary drum 10 is stopped.

As shown in FIG. 11, a plurality of rotation detection levers 4c are provided between the upper seat plate 4a and the lower seat plate 4b, and the lower end of the shutter curtain 1 during its own weight lowering comes into contact with an obstacle, Lower seat plate 4b
Is moved relative to the upper seat plate 4a, the detection lever 4c is interlocked with the upper seat plate 4b.
Is designed to rotate. Lower end portions of the plurality of rotation detection levers 4 c are connected to each other by a wire 4 d, and one end of the wire 4 d is connected to the rotation lock member 11. The lower end of the rotation detection lever 4c is inclined in a direction away from the rotary drum 10, and the lower seat plate 4b.
Is moved upward relative to the upper seat plate 4a, the rotation detection lever 4c is moved to the rotation detection lever 4c.
The lower end further rotates in a direction away from the rotating drum 10, and the wire 4 d is pulled in a direction away from the rotating drum 10. By connecting a plurality of rotation detection levers 4c arranged at intervals in the length direction of the seat plate 4 with a single wire 4d, any part in the length direction of the seat plate 4 at the lower end of the shutter curtain that falls by its own weight. Even if an obstacle hits, one rotation lock member 11 can be rotated well. In the illustrated example, the rotation detection lever 4 is provided on both sides of the rotary drum 10.
c, and a pair of left and right rotation lock members 11 connected to the wires 4d connected to the respective rotation detection levers 4c are provided, but the rotation lock members 11 are arranged closer to the end of the seat plate. Thus, a single rotation lock member 11 may be provided.

The rotation lock member 11 is a “legal” rotation lever extending in the vertical direction, and is provided on the cover body 100 so as to be rotatable around a rotation fulcrum 110 formed at an intermediate portion. The locking claw 11 a of the rotation lock member 11 is formed above the rotation fulcrum 110. The upper end and the lower end of the rotation lock member 11 are connected to coil springs 12 and 13, respectively. The force of the coil spring 13 is set larger than the force of the coil spring 12. The other end of the upper coil spring 12 connected to the upper end of the rotation lock member 11 is connected to the cover body 100, and the upper coil spring 12 locks the rotation lock member 11 in the unlocking direction (of the rotation lock member 11). The upper half is biased in the direction away from the rotary drum 10). The part where the rotation lock member 11 and the upper coil spring 12 are mounted is the rotating drum 1 with respect to the seat plate 4.
Other parts and members may be used depending on the wearing or accommodation of 0.

The other end of the lower coil spring 13 connected to the lower end of the rotation lock member 11 is connected to the wire 4d. The lower coil spring 13 is rotated by the rotation lock member 11 and rotated. A buffering spring is configured to alleviate the impact when the locking claw 11a hits the tooth-shaped locked portion 10a of the rotating drum. In order to quickly detect the obstacle, the locking claw 11a of the rotation lock member 11 is engaged with the tooth-shaped locked portion 10a of the rotary drum 10 at the initial stage of the upward movement of the lower seat plate 4b.
It is desirable to be locked. In order to return to the brake, it is necessary to pull the return wire by a predetermined amount (that is, the shutter curtain 1 needs to be lowered by a predetermined amount), and the lower seat plate 4b hitting the obstacle is engaged with the rotation lock member 11. Even after the claw 11a is locked to the tooth-like locked portion 10a of the rotary drum 10, it is necessary to move up relatively. At this time, the lower coil spring 1
By extending 3, the load on the locking portions (the locking claws 11a and the locked portion 10a) accompanying the upward movement of the lower seat plate 4b after the rotary drum 10 is locked is reduced.

The operation of the evacuation stop device configured as described above will be described. When a fire is detected by the fire detector, a signal (DC24V) is output from the disaster prevention panel, the automatic closing device 6 is activated, the brake release wire W1 is pulled, and the left side 721 of the first operating body 72 is At the same time, the right side 722 of the first operating body 72 is moved to the automatic closing device side, so that the second operating body 73 is moved to the automatic closing device side via the coil spring 74. The brake of the opening / closing machine 5 is released by moving and the upper end portion of the left side 731 of the second operating body 73 abutting against the brake release lever 8 and forcibly moving it.

When the brake of the opening / closing machine 5 is released, the shutter curtain 1 wound and accommodated above the opening part falls under its own weight, and the second wire W3 is accompanied by the lowering of its own weight.
Extends along the surface of the shutter curtain 1 while being pulled out from the rotary drum 10.
If there is no obstacle on the descending path of the shutter curtain 1, the shutter curtain 1 descends as it is to close the opening. When there is an obstacle (including a person) below the shutter curtain 1 that falls by its own weight, the lower seat plate 4b comes into contact with the obstacle and moves upward relative to the upper seat plate 4a.

When the lower seat plate 4b moves upward, the rotation detection lever 4c rotates to pull the wire 4d and pull the wire 4d, so that the lower end side of the rotation lock member 11 is pulled away from the rotary drum 10. The rotation lock member 11 is centered on the rotation fulcrum 110 and the upper end is the coil spring 1.
2, the locking claw 11 a of the rotation lock member 11 is engaged with the teeth 10 a of the rotation drum 10 to stop the rotation of the rotation drum 10. When the rotation of the rotary drum 10 is stopped, the drawing of the second wire W3 is also stopped. As the shutter curtain 1 is lowered, the first wire W2 is drawn through the slide 91 of the second wire and the wire relay 9, The second operating body 73 to which the end portion of the first wire is fixed is pulled. When the second operating body 73 moves to the right side, the brake release lever 8 becomes free, the brake of the opening / closing machine 5 returns, and the descent of the shutter curtain 1 stops.

When the obstacle is removed, the lower seat plate 4b moves downward, the wire 4d is no longer pulled, and the rotation lock member 11 is returned to its original position by the force of the coil spring 12, and the rotary drum 10 is restored. The locked state of is released. When the locked state is released, the rotation restriction of the rotary drum 10 is released, the second wire W2 can be pulled out, the force for pulling the first wire W1 is lost, and the second operating body 73 is compressed by the coil spring 74. Moves to the automatic closing device side, the left side 731 of the second operating body 73 moves the brake release lever 8 to release the brake, and the shutter curtain 1 is lowered again by its own weight. Also, a delay mechanism (such as a viscous damper) that delays a predetermined time until the brake is released after detecting the obstacle so that the evacuees can evacuate smoothly after the obstacle is removed. It may be provided.

FIG. 1A shows a schematic front view of another embodiment of the shutter device according to the present invention. In comparison with the above-mentioned embodiment, the same number is attached | subjected about the same member and description as stated above can be used about the member to which the same number was attached | subjected. In FIG. 1A, the second wire W3 constituting the return wire is wound around a rotary pulley 10 ′ provided on the seat plate 4 (second wire W3).
Is wound around the rotating pulley 10 'so that it does not slip, and a winding spring 10 "(for example, a spring spring that urges the second wire W3 in the direction of winding and storing the second wire W3) is folded over the opening. Built-in winding device). When the brake that restricts the rotation of the winding shaft 2 is released, the shutter curtain 1 falls by its own weight. At that time, the rotating pulley 10 ′ provided on the seat plate 4 at the lower end of the shutter curtain 1 lowers while rotating. The portion W30 of the second wire W3 drawn out from the winding device 10 ″ is guided back by the rotary pulley 10 ′ and is folded back as the shutter curtain 1 is lowered by its own weight.
The dimension of the wire W3 between the wire repeater 9 and the rotary pulley 10 'is extended. The configurations of the seat plate 4 and the lock mechanism are as described. When the seat plate 4 at the lower end of the shutter curtain 1 that descends by its own weight hits an obstacle, the lock mechanism is actuated to stop the rotation of the rotary pulley 10 '. When the rotation of the rotating pulley 10 'stops, the dimension of the portion W31 becomes constant, and the shutter curtain 1 further lowers its own weight, whereby the first wire W2 is pulled and the brake returns.

Although the actuating means including the two actuating bodies 72 and 73 has been described, the actuating means is not limited to this. Another embodiment of the operating means is shown in FIGS. The same members as those shown in FIGS. 4 to 6 are denoted by the same reference numerals. In the example shown in FIGS. 7 and 8, one operating body 75 is provided so as to be movable in the length direction of the guide shaft 71 with respect to the guide shaft 71. The actuating body 75 has a cylindrical portion 750 and left and right side walls 751, 7 provided opposite to the cylindrical portion 750 with a space therebetween.
52, and a first spring 76 is provided between the left side wall 751 of the operating body 75 and the left side wall 701 of the frame 70. On the other hand, a second spring 77 is provided between the right side wall 752 of the operating body 75 and the right side wall 702 of the frame 70.

An end of the brake release wire W1 is connected to the left side wall 751 of the operating body 75, and an end of the return wire (first wire W2) is connected to the right side wall 752 of the operating body 75. FIG. 7 shows the shutter open state (brake return state). When the brake release wire W1 is pulled by the automatic closing device, the operating body 75 automatically compresses the first spring 76 and extends the second spring 77. Moving to the closing device side, the left side wall 751 of the operating body 75 comes into contact with the brake release lever 8 and moves it to release the brake. FIG. 8 shows the shutter during its own weight drop (brake release state). When the brake is returned, the return wire W2 moves the operating body 75 in a direction away from the brake release lever 8 to return the brake.
At this time, the extension force of the first spring 76 and the compression force of the second spring 77 act in the brake return direction. The auxiliary springs for returning the release lever are the first spring 76 and the second spring.
Either one of the springs 77 may be used.

[Appendix]
A mechanical evacuation stop device for a self-weight descent shutter according to the present invention is a self-weight descent shutter that releases the brake and lowers the shutter curtain by its own weight. Operating means for returning the brake by moving in a second direction opposite to the direction, a return wire connected to the operating means so as to move the operating means in the second direction, and a seat plate at the lower end of the shutter curtain The rotating body is provided at a portion exposed to the opening other than the end portion, and the rotating body around which the return wire is wound and the seat plate, and is locked to the rotating body to restrict the rotation of the rotating body. A lock member, and the other end of the return wire is housed so that it can be pulled out along the surface of the shutter curtain as the rotating body rotates as the shutter curtain is lowered by its own weight. The seat plate is composed of an upper seat plate and a lower seat plate that can move up relative to the upper seat plate. Between the upper seat plate and the lower seat plate, the lower seat plate moves upward. A detection lever that is displaced in conjunction with the detection lever is provided, and the detection lever and the lock member are coupled so that the lock member moves in a direction of being locked to the rotating body in conjunction with the displacement of the detection lever. When the lower seat plate at the lower end of the shutter curtain that falls under its own weight hits an obstacle, the lock member moves to restrict the rotation of the rotating body and restrict the drawer of the return wire that is housed. Moves the actuating means in the second direction to return the brake.
In one aspect, the rotating body is a rotating drum having means for urging the other end side of the return wire in a winding direction, and the other end of the return wire is connected to the rotating drum, The drum constitutes a winding body for the return wire. In another aspect, the rotating body is a rotating pulley, and an end portion of the return wire wound around the rotating pulley is wound around a winding device provided above the opening.
As long as the lock member is a movable member that moves in conjunction with the displacement of the detection lever and engages with the rotating body, the mode of movement (rotation, slide, etc.) is not limited, but in one preferred mode, The lock member is a rotation lock member that rotates in conjunction with the displacement of the detection lever. As long as the detection lever is a movable member that is displaced in conjunction with the upward movement of the lower seat plate, the mode of displacement (turning, sliding, etc.) is not limited, but in one preferred mode, the detection lever is This is a rotation detection lever that rotates in conjunction with the upward movement of the seat plate. In one embodiment, a tooth-like locked portion is continuously formed on the periphery of the rotating body, and a locking claw that locks the locked portion is formed on the lock member. In one aspect, lock members are provided on the left and right sides of the rotating body, and one or more detection levers are disposed on the left and right sides of the rotating body on the seat plate. One or more detection levers located on the left side of the body are connected to the lock member on the left side of the rotary body, and one or more detection levers located on the right side of the rotary body are connected to the lock member on the right side of the rotary body. . In a further preferred embodiment, a plurality of detection levers are provided at least on one side of the rotating body (rotating drum) at intervals in the length direction of the seat plate, and the plurality of detection levers are connected to the connecting member (one). In one embodiment, the detection levers connected to each other are simultaneously displaced (turned in a preferred embodiment) by being connected to each other with a wire), and the connecting member is a locking member (a turning lock member in a preferred embodiment). It is connected to. By connecting the connecting member and the rotation lock member via a buffer spring, it is possible to reduce the impact when the locking claw of the rotation lock member comes into contact with and locks the locked portion. Deterioration of parts can be prevented, rotation of the rotating body can be regulated stably, and the brake can be returned.
In one embodiment, the return wire has one end connected to the actuating means and the other end connected to the wire repeater, one end connected to the wire repeater, and the other end to the rotating body. The wire repeater is positioned above a vertical line passing through the rotating body and provided above the opening, and the second wire is disposed on the shutter curtain when the shutter curtain is lowered by its own weight. It extends so as to hang down along the surface.
In one aspect, the brake is forcibly released by the movement of the brake release lever, and when the forcible force by the brake release lever is released, the brake is returned by the urging means, and the operating means has the first direction and A first actuating body and a second actuating body movable in a second direction; and a spring member interposed between the first actuating body and the second actuating body. The first actuating body is movable in the second direction, the first direction side end of the spring member is in contact with the second actuating body, and the second direction side end of the spring member is the first direction. A first direction traction member (in one aspect, a brake release wire) is connected to the first operation body, and at the time of traction in the first direction by the first direction traction member, The first operating body, the second operating body, and the spring member are integrated. Moving in the first direction, the second operating body forcibly moves the brake release lever to release the brake, the return wire is connected to the second operating body, and the return wire from the brake released state At the time of towing in the second direction, only the second operating body moves in the second direction against the spring member, the forcing force by the brake release lever is released, and the brake is restored by the biasing means. .
In the present invention, since a mechanical stop is performed at the time of evacuation, electricity is not required, retrofitting to an existing manual shutter is easy, and there is no cost for electricity. Furthermore, since no electrical parts are used, the evacuation stop device of the present invention can be employed for shutters installed in warehouses or factories that handle highly ignitable items. Since the return wire extends along the shutter curtain surface portion as the shutter curtain is lowered by its own weight, it is possible to prevent the return wire from being damaged as much as possible. In one embodiment, an obstacle can be detected stably while using one rotating body. . In one aspect, it is possible to relieve an impact when the rotation lock member rotates and engages with the rotating body, and a load applied to the engagement portion after the engagement. In one aspect, the return wire is composed of two wires, and the two wires are connected by a repeater,
The return wire can be routed well.
In one aspect, when the brake is returned by the return wire, it is not necessary to move the first operating body. Therefore, the brake can be returned without being affected by the first direction pulling member connected to the first operating body. In a specific example, when the first direction pulling member is pulled by a strong spring of the automatic closing device, or after the brake is released, the first direction pulling member is in a ratchet mechanism or a fixed state built in the automatic closing device. Even when it is connected to a certain motor shaft or the like and does not move, the brake can be satisfactorily restored by the second direction pulling member. Since the pulling force by the return wire is determined by the spring member, it is only necessary to pull the return wire with a constant force, and the tension of the return wire constituting the evacuation stop device can be made constant and stable operation can be performed. .

The present invention can be used for a self-weight drop shutter.

It is a schematic front view of the shutter device according to the present invention. It is a schematic plan view of the shutter device according to another embodiment. FIG. 2 is a schematic front view of the shutter device according to the present invention, which is similar to FIG. 1, except that the shutter curtain is omitted except for a seat plate. It is a schematic side view at the time of accommodation of the shutter device concerning the present invention. It is a figure which shows the brake release apparatus of a shutter open state (brake return state). It is a figure which shows the brake release apparatus in shutter weight fall (brake release state). It is a figure which shows the brake release apparatus of the state which the seatplate switch act | operated during dead weight fall and the shutter stopped (brake return state). Brake release in shutter open state (brake return state) according to another embodiment It is a figure which shows the brake release apparatus in shutter dead weight fall (brake release state) based on other embodiment. It is a figure which shows a wire repeater. It is sectional drawing which looked at the seat board from the side. It is the schematic front view of a seat board, and sectional drawing along the arrow. It is the elements on larger scale which show the rotation drum vicinity site | part in FIG. 11, and a rotation drum exists in an unlocked state. FIG. 13 is a diagram showing the rotating drum in a locked state in FIG. 12.

DESCRIPTION OF SYMBOLS 1 Shutter curtain 2 Winding shaft 3 Guide rail 4 Seat plate 4a Upper seat plate 4b Lower seat plate 4c Detection lever 4d Wire 5 Opening and closing machine 6 Automatic closing device 7 Brake release device 72 First action body 73 Second action body 8 Brake release lever 9 Wire relay 10 Rotating drum 10a Non-locking portion 11 Rotation lock member 11a Locking claw W1 Brake release wire W2 Brake return wire (first wire)
W3 Brake return wire (second wire)

Claims (5)

In the shutter device that releases the brake and lowers the shutter curtain by its own weight,
An actuating means for moving in a first direction to release the brake and for moving in a second direction opposite to the first direction to return the brake;
A return wire coupled to the actuating means to move the actuating means in a second direction;
A rotating body provided in a portion exposed to an opening other than an end portion of a seat plate at a lower end of the shutter curtain, on which the return wire is wound;
A rotation lock member provided on the seat plate and locked to the rotating body to restrict the rotation of the rotating body ;
With
The other end side of the return wire is housed so that it can be pulled out along the shutter curtain surface guided by the guide rail when the rotating body rotates in the first direction as the shutter curtain lowers its own weight. ,
The seat plate is composed of an upper seat plate and a lower seat plate that can move relative to the upper seat plate,
The rotary locking member, in conjunction with the movement on the lower seat plate rotates in a first direction and locking the rotating body in the locked state, the locking is released to rotate in the second direction is configured to so that is,
The first direction for the rotation of the rotating body and the first direction for the rotation of the rotation lock member are the same direction.
When the lower seat plate at the lower end of the shutter curtain that falls under its own weight hits an obstacle, the rotation lock member rotates in the first direction in conjunction with the upward movement of the lower seat plate, and also rotates in the first direction. Locking the rotating body to restrict the rotation of the rotating body and restricting the withdrawal of the return wire stored therein , moving the operating means in the second direction to return the brake;
Shutter device. The rotating body includes a large number of tooth-like locked portions formed continuously at the periphery,
The rotation lock member includes a locking claw that rotates in a first direction and locks to the locked portion.
The shutter device according to claim 1. After the obstacle is removed, the lower seat plate moves downward, the locking of the rotation lock member to the rotating body is released, the return wire can be pulled out, the brake that has detected the obstacle and returned The shutter device according to claim 1, wherein the shutter device is configured so as to release the shutter curtain and lower the shutter curtain by its own weight. The shutter device according to claim 1, wherein the rotation lock member is urged in a second direction. The lower seat plate is movable upward relative to the upper seat plate even after the rotation lock member is locked to the rotating body.
The return wire in which the drawer is restricted moves the operating means in the second direction by moving the upper seat plate relative to the lower seat plate as the shutter curtain descends, thereby returning the brake.
The shutter device according to claim 1.

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