JP2017096073A - Fire shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire shutter which performs restoration of an automatic closing device and a closing as necessary by a manual closing device at the same place.SOLUTION: A fire shutter includes: a shutter curtain 1 descending by the self-weight by release of a brake; an automatic closing device 6 activated based on a fire detection signal and releasing the brake; a manual closing device including a manual closing operation body (emergency closing switch 103) for releasing the brake manually; an automatic closing device restoration operation body (automatic closing device restoration lever 106) for restoring the activated automatic closing device 6; and an operation box (second operation box 10B) including a lid body (second lid body 102) which can be locked. The manual closing operation body (emergency closing switch 103) can be operated in a state where the lid body (second lid body 102) is closed. The automatic closing device restoration operation body (automatic closing device restoration lever 106) cannot be operated in a state where the lid body (second lid body 102) is closed, and it can be operated in a state where the lid body (second lid body 102) is opened.SELECTED DRAWING: Figure 34

Description

The present invention relates to a fire shutter, and more particularly, to a fire shutter having a shutter curtain that lowers its own weight by releasing a brake by operating an automatic closing device or operating a manual closing device in the event of a fire.

In the case of a fire shutter, an automatic closing device is activated by a signal from a disaster prevention panel in the event of a fire to release the brake, and the shutter curtain is lowered by its own weight to close the opening of the building. Further, the fire shutter can release the brake by the operation from the manual closing device regardless of the fire detection signal, and the weight can be lowered. A fire prevention shutter is provided with a so-called harm prevention device in order to prevent an evacuee from being caught in a shutter curtain that falls under its own weight.

The mechanical hazard prevention device that mechanically stops the shutter curtain that falls under its own weight moves the brake release lever of the switch by an automatic closing device that receives a signal from the disaster prevention panel that has received a fire signal from the sensor in the event of a fire. Release the brake to lower the weight of the shutter curtain, and if the seat plate at the bottom of the shutter curtain detects a person or an obstacle while the weight is falling, the brake release lever and brake of the switch are returned and the shutter is temporarily stopped. When the obstacle is removed after the shutter is temporarily stopped, the shutter curtain is lowered again by its own weight to close the opening (Patent Document 1).

The automatic closing device has a movable element that can move between the standby position and the operating position. In the event of a fire, the movable element moves from the standby position to the operating position, so that the brake is released as the movable element moves. The brake of the switch is released by moving the lever. Therefore, when the shutter curtain falls by its own weight and the building opening is closed, it is necessary to restore the movable element of the automatic closing device to the original standby posture after that.

The restoration of the automatic closing device in the conventional fire-proof shutter has been performed by opening the ceiling inspection port and manually pulling the short wire connected to the movable element of the automatic closing device directly. However, since the resistance when moving the movable element in the operating posture to the standby posture (for example, depending on the structure of the automatic closing device, it is necessary to compress a strong tension coil spring) is large, the operation force is heavy and work The sex was getting worse.

In addition, fire shutters are often equipped with a manual closing device for closing the shutter at any time.Recovering the automatic closing device is not performed by opening the ceiling inspection port, but various manual operations can be performed at the same location. There is also a desire to do it.
JP 2009-13647 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide a fire shutter that restores an automatic closing device and closes at any time by a manual closing device at the same location.

The technical means adopted by the present invention are:
A shutter curtain that descends by releasing the brake,
An automatic closing device that operates based on a fire detection signal to release the brake;
A manual closing device with a manual closing operation body for manually releasing the brake;
An automatic closing device restoration operation body for restoring the activated automatic closing device;
An operation box with a lid that can be locked and unlocked;
With
The manual closing operation body can be operated with the lid closed.
The automatic closing device restoration operation body is inoperable when the lid is closed, and can be operated with the lid open.
Fire shutter.

In one aspect, the automatic closing device restoration operation body is accommodated in the internal space of the operation box.
In addition, the automatic closing device restoration operation body which cannot be operated with the cover closed is not limited to the one housed in the internal space of the operation box, and may be provided outside the internal space. For example, lock means for restricting the operation of the automatic closing device restoration operation body may be provided, and the lock means may be released by opening the lid.
In a more specific aspect, when the locking means is released in conjunction with the opening of the lid, there is a case where the locking means is released by operating the operation unit in the operation box after the lid is opened.

In one aspect, the automatic closing device recovery mechanism and the automatic closing recovery operation body are connected by an automatic closing device recovery wire,
In the inner space of the operation box, there is provided a pulley for turning and guiding the automatic closing device recovery wire,
In a state where the lid is unlocked and opened, the automatic closing device is restored by pulling the automatic closing device restoring operation body via the pulley.

In one aspect, the manual closing device includes a brake return operation body for returning a brake released by the manual closing operation body, and the brake return operation body is operated in a state where the lid body is closed. Is possible.
In one aspect, the brake return operation body can be operated only when the brake is released by the operation of the manual closing operation body.
In one aspect, the manual closing operation body can be operated by pressing a predetermined part on the closed lid body,
The brake return operation body is provided adjacent to the lid body, and can be operated by operating the manual closing operation body.

In the present invention, the operation box is provided at a height at which the housing (wall body or the like) is easy to operate, and thus the automatic closing device can be restored without opening the ceiling inspection port as in the prior art. .
In one aspect, the brake is a brake of an opening / closing machine that electrically opens and closes a shutter curtain to open and close the opening,
A switch box having an open / close operation switch is disposed adjacent to the operation box.
In one aspect, the brake is a brake of an opening / closing machine that electrically opens and closes a shutter curtain to open and close the opening,
The operation box is a switch box provided with an opening / closing operation switch.
In one aspect, the automatic closing device restoration operating body is inoperable by the locking means when the lid is closed, and can be operated when the lid is opened. In the case where the locking means is released in conjunction with the opening, there is a case where the locking means is released by operating the operation unit in the operation box after the lid is opened.

Although the present invention is not limited, in the embodiment described later, the operation force of the recovery operation of the automatic closing device is reduced by using a booster mechanism without affecting the operation of the automatic closing device, and at the time of recovery. An automatic closing device is disclosed that includes a recovery device that prevents damage to elements, wires, and the like of the automatic closing device by reducing the operation force of the automatic closing device.
More specifically, an automatic closing device with a recovery device is
The automatic closing device is movable between a first position in a standby state and a second position in an operating state, and the brake is released by moving from the first position to the second position. With movable elements,
The recovery device is
A movable mechanism;
An automatic closing device restoration operation body,
An automatic closing device recovery wire connecting the movable mechanism and the automatic closing device recovery operation body;
Boosting mechanism of operation force by the automatic closing device recovery wire,
With
The movable mechanism allows the movable element to move from the first position to the second position, and when the automatic closing device recovery wire is pulled by the automatic closing device recovery operation body, the boost mechanism Thus, the movable element in the second position is forcibly moved to the first position.
In one aspect, the movable mechanism is
A first movable body connected to the movable element and movable integrally with the movable element between a first position in a standby state and a second position in an operating state;
A second movable body connected to one end of the automatic closing device recovery wire and movable between the first posture and the second posture;
Cooperation means for causing the moving force of the second movable body to act on the first movable body;
With
The linkage means allows the second movable body to move the movable element and the first movable body from the first position to the second position while maintaining the first posture, When the automatic closing device recovery wire is pulled by the closing device recovery operation body to move from the first posture to the second posture, the first movable body in the second position and the The movable element is forcibly moved to the first position.
In one aspect, the said 1st movable body may be comprised from the part of the said movable element of the said automatic closure apparatus.
In one aspect, the second movable body is rotatable between a first posture and a second posture,
The distance from the rotation fulcrum of the second movable body to the connecting portion of the automatic closure device recovery wire is based on the distance from the rotation fulcrum to the point where the rotational force of the second movable body acts on the first movable body. Is also big.
In one aspect, the cooperation means includes
A guide opening formed in the first movable body and extending in the moving direction of the first movable body;
A guide shaft formed on the second movable body and inserted through the guide opening,
When the first movable body is in the first position, the guide shaft is in the first position in the guide opening, and when the first movable body is in the second position, the guide shaft is in the guide opening. In the second position of
When the first movable body moves from the first position to the second position, the guide shaft moves relatively from the first position to the second position in the guide opening;
When the guide shaft is at the second position in the guide opening, the contact portion between the guide shaft and the edge of the guide opening acts by rotating the second movable body in the first position to the second position. It functions as a point, and the force is transmitted to the first movable body.
In one aspect, the second movable body is biased by a biasing means in a direction of moving from the second posture to the first posture,
When the force for pulling the automatic closing device recovery wire is released, the second movable body returns from the second posture to the first posture.
In this case, the recovery mechanism can automatically return to the original state after recovery of the automatic closing device, and after the automatic closing device is restored by pulling the automatic closing device recovery wire, no special operation is performed. The automatic closing device and the return mechanism are in a standby state.
In one aspect, the automatic closing device releases the brake via an operating part spaced apart from the automatic closing device.

In one aspect, the self-closing device is applied to a so-called management combination shutter, more specifically,
An opening and closing machine that electrically opens and closes the shutter curtain to open and close the opening;
An actuating portion including a first actuating body that is movable in the first direction and the second direction and that moves in the first direction to become 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 that is movable relative to the upper seat plate;
A string member for return connected to the operating portion and configured to be pulled out as the shutter curtain descends;
A lock device that mechanically restricts the withdrawal of the return string member by lowering the lower seat plate of the shutter curtain being hit against an obstacle and moving upward relative to the upper seat 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 in the second direction from the position, the brake release lever is moved in the brake return direction to mechanically return the brake of the switch, and it is configured to be movable from the steady position in the second direction. And
The operating unit includes first detecting means for detecting that the first operating body has moved from the steady position in the second direction and outputting an obstacle detection signal to the control unit,
When the lower seat plate of the shutter curtain during electric lowering hits an obstacle, the second operating body in the steady position is pulled by the pulling of the return string-like member whose pull-out is restricted due to the shutter curtain lowering. The controller that has received the obstacle detection signal from the first detection means stops the electric descent of the shutter curtain,
When the lower seat plate of the shutter curtain that is falling under its own weight hits an obstacle, the first actuating body in the brake release position is pulled by the pulling of the return-like string-like member that is controlled to be pulled out when the shutter curtain is lowered. Move in the direction of 2 to mechanically return the brake of the switch to stop the weight reduction of the shutter curtain.
Used for electric shutters with mechanical hazard prevention devices.
In one aspect, the first operating body includes a “steady position”, “a position moved from the steady position in the first direction (brake release position)”, and “a position moved from the steady position in the second direction (obstacle). Detected position) ”.
The “steady position” refers to the position of the first operating body during normal electric opening and closing.
In one aspect, the brake is returned when the first operating body in the brake release position moves in the second direction and returns to the steady position. In this case, the “steady position” is also an obstacle detection position at the time of falling by its own weight.
The first operating body moves in the first direction when the automatic closing device is activated in the event of a fire (or by a manual closing operation from the manual closing device). It does not matter whether it is directly connected to the movable part of the closing device or moves in the first direction via one or more other elements of the actuating part. In an embodiment described later, when the automatic closing device is operated, the first operating body moves in the first direction integrally with the second operating body, and the first operating body is moved to the second operating body and the manual closing operation. It moves in the first direction integrally with the third operating body.
In one aspect, the first operating body moves in the first direction from the steady position to hit the brake release lever of the switch and press the brake release lever to release the brake.
The return string member is connected to the first operating body.
In one aspect, the operating unit is provided with second detecting means for detecting that the operating unit is in a brake release posture and outputting an operation confirmation signal to the control unit.
When the operation confirmation signal is input to the control unit, the control mode is changed from the electric open / close mode to the self-weight drop mode.
In one aspect, the actuating portion includes a second actuating body that is movable in a first direction and a second direction and connected to the automatic closing device,
The second operating body is moved in the first direction by the operation of the automatic closing device, so that the first operating body in the steady position is moved in the first direction,
The second detection means detects movement of the second operating body in the first direction.
In one aspect, the actuating portion includes a third actuating body that is movable in a first direction and a second direction and connected to a manual closing device,
The third operating body moves in the first direction by operation of the manual closing device, thereby moving the first operating body in a steady position in the first direction via the second operating body. And
The second detection means detects the movement of the second operating body in the first direction accompanying the movement of the third operating body in the first direction.
As described above, the control mode is changed from the electric open / close mode to the self-weight drop mode in either case of the operation of the automatic closing device or the manual closing operation from the manual closing device by one common second detecting means, This makes it possible to disable the operation of the push button and stop the shutter curtain that is being electrically opened and closed.

In the present invention, the automatic closing device recovery operation body is not operable when the lid is closed, and can be operated when the lid is opened. When the self-weight falls, the automatic closing device cannot be restored unless the lockable / unlockable lid is opened. Typically, since the lid is normally locked, it is necessary to open the lid using a key, so that mischief can be prevented. By doing this, the automatic closing device can be restored at an easy-to-operate position without opening the ceiling inspection port as in the past, but a fire prevention zone is not formed at the time of fire due to mischief or misoperation etc. It is preventing.
In one aspect of the present invention, the manual closing device includes a brake return operation body for returning a released brake, and the brake return operation body can be operated in a state where the lid body is closed. Therefore, when the shutter curtain is closed at any time with the manual closing device, it can be easily restored, and the shutter curtain under its own weight can be stopped halfway at an arbitrary position. This is useful when it is desired to stop the shutter curtain halfway.

It is a schematic front view of the electric shutter apparatus provided with the harm prevention apparatus. In the figure, the solid line connecting the elements is an electric wire, and the alternate long and short dash line is a wire. It is the whole front view which abbreviate | omitted the ceiling of the electric shutter apparatus (opening part fully closed state) provided with the harm prevention apparatus. It is the elements on larger scale (the side in which the switch was installed) of FIG. FIG. 4 is a partially enlarged view of FIG. 3. It is a longitudinal cross-sectional view of FIG. It is the elements on larger scale of FIG. It is a figure similar to FIG. 6 in an opening part full open state. It is a fragmentary longitudinal cross-sectional view of FIG. It is a figure which shows an automatic closing device (at the time of monitoring). It is a figure which shows an automatic closing device (at the time of brake release by the fire detection signal / self-weight drop). It is a figure which shows an action | operation part (each element exists in a steady position). It is a figure which shows an action | operation part (electrical open / close mode). It is a figure which shows an action | operation part (at the time of the obstruction detection in electric open / close mode). It is a figure which shows an action | operation part (at the time of the own weight fall by an automatic closing device action | operation). It is a figure which shows an action | operation part (at the time of the obstruction detection in an automatic closing device action | operation). It is a figure which shows an action | operation part (at the time of the own weight fall by manual closing device operation). It is a figure which shows an action | operation part (at the time of the obstruction detection by manual closing device operation). It is component drawing which shows the flame | frame of an operation part. It is a component diagram which shows the 1st operation body of an operation part. It is a component diagram which shows the 2nd operation body of an operation part. It is a component diagram which shows the 3rd operation body of an operation part. The recovery mechanism integrated type which concerns on this embodiment is shown. The detail of the recovery mechanism which concerns on this embodiment is shown. It is a longitudinal cross-sectional view of the base end part of the 2nd lever of a recovery mechanism. It is a figure explaining operation | movement of the recovery mechanism integrated automatic closure apparatus which concerns on this embodiment. It is a figure which shows a locking device (normal time). It is the elements on larger scale which show a locking device (locked state). It is a figure which shows a locking device (at the time of a seat board obstruction removal), and the shutter curtain is stopping. It is a figure which shows the locking device (at the time of a seat board obstruction removal) which each lever rotated slightly in the 2nd direction from the state of FIG. 28, and the shutter curtain is stopping. It is a figure which shows a locking device (at the time of shutter curtain re-falling). It is a figure which shows a relay apparatus. It is a figure which shows the operation | movement of the relay part at the time of an electric descent, and shows (A) steady position (at the time of electric descent), (B) obstacle detection at the time of electric descent, and (C) after obstacle removal (electric descent). . It is a figure which shows the operation | movement of the relay part at the time of dead weight fall, (A) Steady position (at the time of a stop before dead weight fall), (B) At the time of dead weight fall (operation | movement of an automatic closing device, operation of a manual closing device), (C ) Obstacle detection at the time of weight drop (same as the normal position), (D) After obstacle removal (weight drop). It is the top view and front view of an operation box. (A) is AA sectional drawing of the operation box shown in FIG. 34, (B) is BB sectional drawing of the operation box shown in FIG. It is a figure which shows the state which open | released the cover body and pulled out the automatic closing device recovery lever from the state of FIG. It is a figure which shows the operation | movement chart in the electric open / close mode of a shutter, (1) is at the time of raising, (2) is at the time of descent, (3) shows the time of obstacle detection. It is a figure which shows the operation | movement chart of a shutter, (1) when a brake release is performed at the time of an electric lift, (2) when a brake release is performed at the time of an electric drop, (3) is an obstacle during a weight drop When a detection is performed, It is a figure which shows a delay mechanism. It is the elements on larger scale of FIG. It is a longitudinal cross-sectional view of FIG. It is a figure which shows a delay mechanism, and the upper figure is a front view and the lower figure is a bottom view. It is a figure which shows the seat plate and detection lever in a normal attitude | position, the left figure is a longitudinal cross-sectional view, and the right figure is a front view. It is a figure which shows the seat board and detection lever in an obstruction detection attitude | position (lower seat board upward movement attitude | position), The left figure is a longitudinal cross-sectional view, The right figure is a front view.

[A] Overall Configuration of Electric Shutter with Mechanical Hazard Prevention Device As shown in FIGS. 1 to 7, the shutter device includes a shutter curtain 1 that closes the opening and a shutter curtain 1 that is positioned above the opening and winds the shutter curtain 1. A winding shaft 2 to be mounted, and guide rails 3 erected on both left and right ends of the opening are provided. The shutter curtain 1 is configured by vertically connecting a plurality of elongated slats extending in the opening width direction, and a seat plate 4 is provided at the lower end. The take-up shaft 2 is rotatably supported between left and right brackets 13 provided so as to be brought out from the housing 12. As shown in FIG. 1 and FIG. 2, an opening / closing machine M is provided at a position near one side of the opening width direction above the opening. The opening / closing machine M is attached to the bracket 13 on one side in the opening width direction. 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 square shutter box (not shown) attached to the housing. You may do it. In normal times, the shutter curtain 1 is electrically lifted by opening and closing the winding shaft 2 by the opening and closing machine M to open and close the opening. As shown in FIGS. 2, 7, 8, and the like, the seat plate 4 has a long upper seat plate 40 extending in the width direction of the opening and a lower side of the upper seat plate 40 relative to the upper seat plate 40. It consists of a long lower seat plate 41 suspended so as to be movable, and as will be described later, the seat plate 4 detects an obstacle when the shutter curtain 1 that is electrically lowered or lowered by its own weight hits the obstacle. It is a component of the obstacle detection means.

The shutter device includes an automatic closing device 6 that lowers the shutter curtain 1 by its own weight in the event of a fire and an operation unit 7 (brake release / return device). In the illustrated embodiment, the automatic closing device 6 and the operating portion 7 are separated from each other, and the automatic closing device 6 and the operating portion 7 are mechanically connected via a wire W1 (extending in the outer wire W1 ′). When the fire signal is input, the automatic closing device 6 operates and pulls the wire W1, so that the operating portion 7 enters the brake release posture and the brake of the switch M is released. In addition, regardless of whether it is an electric descent or a self-weight descent, the stop of the descent of the shutter curtain 1 when the shutter curtain 1 being closed hits an obstacle is via the operating unit 7 (in the case of electric descent). The operation of the microswitch SW1 is performed, and in the case of the weight drop, the brake release lever ML is mechanically restored). In the present embodiment, the automatic closing device 6 is integrated with the recovery mechanism 5. Specific configurations of the automatic closing device 6, the operating unit 7, and the recovery mechanism 5 will be described in detail later.

The shutter device includes a control unit, and as will be described later, different control is performed in an electric opening / closing mode (normal mode) and a self-weight drop mode (fire mode). In the present embodiment, the control unit includes an obstacle detection control panel 11A and a shutter control panel 11B. As shown in FIG. 1, in this embodiment, the operation 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 opening / closing operation switch 100 (first operation box 10A) in the operation box 10 and the obstacle detection control panel 11A are electrically connected. At the time of electric lifting, an open signal, a close signal, and a stop signal based on an 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. One control unit may be used. The control unit will be described in detail later. Moreover, as shown in FIG. 1, the sensor 6A and the disaster prevention board 6B, the disaster prevention board 6B, and the automatic closing device 6 are each electrically connected. The present invention can also be applied to a manual shutter device. In this case, the first operation box 10A is not necessary.

When the opening is fully opened (stored), the shutter curtain 1 is wound around the winding shaft 2 in a state in which the lowering is restricted by a brake that is a constituent element of the opening / closing machine M. When a fire occurs in this state, the fire is detected by the fire detector 6A, the automatic closing device 6 is actuated by a fire detection signal from the disaster prevention panel 6B, and the actuating unit 7 is brought into a brake releasing 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), and the brake of the switch M is released. When the brake is released, the shutter curtain 1 descends by its own weight while being guided by the groove portion of the guide rail 3 at both ends in the width direction, and the opening is fully closed by the seat plate 4 landing. At this time, the shutter curtain 1 is lowered at a speed adjusted by the action of a speed governor (governor) built in the opening / closing machine M.

The brake release lever ML protrudes from the brake case of the open / close machine M (see FIG. 7). The brake that restricts the rotation of the winding shaft 2 is released. In an electric shutter, a switch including a brake and a brake release lever for releasing the brake are well known. In a specific example, the brake means includes a brake plate that is slidably opposed to a switch output shaft or a rotating member that rotates integrally with the output shaft. The brake plate is pressed against by the urging means, and the brake works to restrict the rotation of the winding shaft. By swinging the brake release lever against the spring, the brake plate is separated 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 plate is pressed by the spring as the urging means so that the brake and the brake release lever are automatically returned. 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 forcible force by the brake release lever is released.

The shutter device is equipped with a so-called harm prevention device. When the seat plate 4 at the lower end of the shutter curtain 1 falling under its own weight hits an obstacle and detects the obstacle, the brake of the switch M is returned via the return wire. Thus, the descent of the shutter curtain 1 is stopped. 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 on the side where the opening / closing machine M in the opening width direction is installed, and the seat plate 4 has an opening width direction so as to be positioned below the relay device 8. A locking device 9 is provided on one side. The lock device 9 includes a lock drum 90 positioned almost 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. Yes. The first wire W2 and the second wire W3 are connected via the relay device 8. 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 in the outer wire W2 ′. One end of the second wire W <b> 3 is connected to the relay device 8, and the other end is wound around a lock drum 90 of a lock device 9 provided on the seat plate 4, and passes through the lock drum 90 to take-up drum 91. It is connected so that it can be wound around. The second wire W3 is drawn out so as to extend along the surface portion of the shutter curtain 1 as the shutter curtain 1 is lowered. The lock device 9 is provided on the upper seat plate 40, and the lower seat plate 41 of the shutter curtain 1 that is being lowered hits an obstacle and moves upward relative to the upper seat plate 40, whereby a return wire (second wire W3) is obtained. ) Is mechanically regulated, and the brake release body (first operating body 73) is pulled in the brake return direction by the return wire (second wire W3 + first wire W2) in which the drawer is restricted. . In this way, when the lower seat plate 41 of the shutter curtain 1 that is falling under its own weight hits an obstacle, the brake release body (first operating body 73) is set by the return wire (second wire W3 + first wire W2). Is moved to the brake return position to stop the weight drop of the shutter curtain 1.

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 is lowered again by its own weight. In addition, after the obstacle is removed, the timing when 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 electric lowering hits an obstacle, the brake release body (first operating body 73) by the return wire (second wire W3 + first wire W2) is used. ) Is detected, and the shutter curtain 1 during the electric descent is stopped.

As shown in FIGS. 39, 43, and 44, in the illustrated embodiment, the obstacle detection means is a detection lever that is rotatably provided between an upper seat plate 40 and a lower seat plate 41 constituting the seat plate 4. No. 42 is used, and the configuration of the 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 a position close to one side in the length direction of the seat plate 4, specifically, the side where the opening / closing machine M in the opening width direction is provided. A rotatable lock drum 90, a rotatable take-up drum 91, a first rotation lever 92, a second rotation lever 93, a third rotation lever 94, and a case 95 that houses these, However, the configuration of the locking device 9 will be described in detail later. Further, the configuration of the delay means for re-falling the dead weight after the 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 a long member having a cross-sectional shape 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 in the opening width direction above the opening portion, directly above the front-view locking device 9 and arranged so as to correspond to the vertically extending wire W <b> 3. Yes. As shown in FIG. 6, the relay device 8 is located on the opposite side of the housing 12 with respect to the shutter core C.

As shown in FIG. 31, the relay device 8 includes a rotating body 80 that is located above the opening and extends in the front-rear direction (inside and outside), and an attachment 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 attached and mounting pieces 811 to be attached to the receiving member 16. The rotating body 80 rotates about the rotation fulcrum 82 so that the first end portion and the second end portion in the front-rear direction move up and down. A fixing portion 83 at the end of the first wire W2 is formed at the first end, and a fixing portion 84 at the upper end of the second wire W3 is formed at the second end. The fixing portion 83 includes a first fixing portion 830 that fixes the end portion of the first wire W2 exposed from the outer wire W2 ′, leaving the surplus end portion, and a second fixing portion 831 that fixes the surplus end portion. The end portion of the first wire W2 is firmly fixed by the two fixing portions of the first fixing portion 830 and the second fixing portion 831. A fixing portion 832 at the end of the outer wire W2 ′ is provided below the fixing portion 83. The fixing portion 832 is attached to the lower part 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 operation mechanism (first operation body 73) of the operation unit 7. ing. The fixing portion 84 sandwiches the end portion of the second wire W3, and an end portion of the second wire W3 is formed with a locking portion 840 having a large diameter with respect to 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 falls downward. The first end portion moves upward to pull the first wire W2. As shown in FIG. 31, the relay device 8 includes a temporary fixing screw 85 that temporarily fixes one support piece 810 and the rotating body 80 at a predetermined position. The temporarily fixing screw 85 temporarily fixes the rotating body 80 at a predetermined angle (appropriate angle at the time of wire attachment) with respect to the mounting base 81 to restrict the rotation, and the rotating body 80 has the predetermined angle. By fixing the first wire W <b> 2 and the second wire W <b> 3 to the rotating body 80 when in the posture, it is not necessary to adjust the posture of the rotating body 80 when the wire is 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 a wall surface in the vicinity of the shutter device so as to be easily operated. The operation box 10 includes a first operation box 10A on the right side which is a box body of a vertically long rectangular parallelepiped, and a second operation box 10B on the left side which is a box body of a vertically long rectangular parallelepiped. Details of the operation box 10 are shown in FIGS. In the illustrated embodiment, the first operation box 10A and the second operation box 10B are formed by dividing the internal space of one box into left and right spaces by a vertical partition plate 10C. The box may be adjacent. A first lid 101 is provided on the front face of the first operation box 10A so as to be opened and closed, and a second lid 102 is provided on the front face of the second operation box 10B so as to be openable and closable. The first operation box 10A is provided with first key means (cylinder lock) for locking the closed state of the first lid 101, and the first lid 101 is inserted with a key for locking and unlocking the first key means. A keyhole 1010 is provided. The second operation box 10B includes second key means (cylinder lock) for locking the closed state of the second lid 102, and the second lid 102 is inserted with a key for locking and unlocking the second key means. There is a key hole 1020 for the purpose.

The first operation box 10A is a switch box, and an opening / closing operation switch 100 (not shown) including an open switch U, a close switch D, and a stop switch S is arranged in the first operation box 10A. Yes. The opening / closing operation switch 100 is electrically connected to the control unit (obstacle obstacle detection control panel 11A, shutter control panel 11B), and when the release switch U is pressed, the shutter curtain is opened by the opening / closing machine M via the control unit. When 1 is raised and the closing switch D is pressed, the shutter curtain 1 is lowered by the switch M via the control unit, and when the stop switch S is pressed, the driving of the switch M is stopped via the control unit and the shutter Curtain 1 stops.

The second operation box 10B is a manual operation box, and is provided with an operation unit of a manual closing device and an operation unit of a recovery device of the automatic closing device 6. In the second operation box 10B, an emergency closing switch (a push switch in the illustrated embodiment) 103 for manual closing is provided at a lower part of the second lid 102, and the front side of the second operation box 10B. A pivot lever 104 is pivotally provided adjacent to the second lid 102 at one side. In the second operation box 10B, a wire end fixing portion 105 for fixing the end portion (the other end) of the wire W4 for manual operation with a screw is provided, and an automatic closing device restoration lever 106 is accommodated. The pushing operation of the emergency closing switch 103 and the manual turning operation of the turning lever 104 can be performed with the second cover body 102 of the second operation box 10B closed, while the automatic closing device restoration lever. The recovery operation of the automatic closing device 6 using 106 needs to be performed by unlocking the second key means and opening the second lid 102.

The operation part (emergency closing switch 103, rotating lever 104) of the manual closing device is mechanically connected to one end of the manual operation wire W4 so that the brake release operation and the brake return operation of the operation part 7 can be performed. Yes. The other end of the wire W4 is connected to the operating unit 7. Note that an opening is formed in the second lid 102 of the second operation box 10B corresponding to the emergency closing switch 103, and the opening is closed by the cover body. The time closing switch 103 is pressed to operate. The wire W4 extends in the outer wire W4 ′. The operation part of the manual closing device operates to release the brake by the first operation (pressing operation of the emergency closing switch 103) from the state before the brake release operation, and the second operation from the state after the brake release operation. The brake is actuated by the (rotating lever 104). Here, a force is applied to the wire W4 to pull up the wire end fixing portion 104 upward (in FIG. 35B) by a second coil spring 77 (described later) of the operating portion 7. The wire end fixing part 105 is moved upward and is locked so that the wire W4 is not loosened. When the emergency closing switch 103 is pressed, the lock is released, the wire end fixing portion 105 moves up a predetermined distance, and the wire W4 in a tensioned state is loosened. Tilt in an inclined manner (brake release posture). Further, when the inclined rotating lever 104 is rotated downward toward the front (indicated by an arrow in FIG. 35B), 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 regulated by the lock mechanism in a state where tension is applied to the wire W4 (brake return posture). Thereafter, the turning lever 104 is turned upward to be stored in the second operation box 10B, and a set state is obtained. Thus, the weight reduction and stop of the shutter curtain by the operation part of the manual closing device can be performed without opening the second lid 102 of the second operation box 10B. The recovery lever 106 and the recovery mechanism 5 constitute a recovery device for the automatic closing device 6. The description of the recovery lever 106 will be described later in relation to the recovery mechanism 5 of the automatic closing device 6.

As shown in FIG. 6, the receiving member 16 of the lintel 15 above the opening is provided with a smoother element 17 on the side opposite to the housing 12 with respect to the shutter core C. Contact or interference with the lintel 15 or the relay device 8 is prevented. The smoother element 17 is fixed (for example, welded) to the receiving member 16 and includes two rollers 170 provided in steps in the opening width direction and the height direction. 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 opening width dimension. In the shutter device that is provided with an emergency switch 18 on the upper side 150 of the lintel 15 and is electrically opened and closed during normal operation, if the shutter curtain 1 does not stop at the upper limit due to a failure of the limit switch LS, etc. When the emergency switch 18 serving as the upper limit overrun detector is activated, the ascent of the shutter curtain 1 by the switch M is stopped. As shown in FIG. 7, the emergency switch 18 has a first contact piece 180 projecting into the movement path of the shutter curtain 1 (the seat plate 4 contacts when the shutter curtain 1 rises beyond the upper limit position). The second abutment piece 181 that rises vertically and extends substantially horizontally rearward (the shutter curtain 1 continues due to a state in which the lowering shutter curtain 1 hits an obstacle, failure of the obstacle detection means, etc. And the shutter curtain 1 wound around the winding shaft 2 increases in diameter and hangs downward to come into contact.

[B] Automatic closing device The automatic closing device 6 operates in response to the input of a fire detection signal from the disaster prevention panel 6B, and moves the brake release lever ML via the wire W1 and the operating unit 7 to release the brake. Based on FIG. 9, FIG. 10, embodiment of the automatic closure apparatus 6 is described. The automatic closing device 6 shown in FIGS. 9 and 10 is only one embodiment, and the present invention is not limited by the configuration of the automatic closing device 6 shown in the figure. Further, FIGS. 9 and 10 are for explaining the components and operation 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 used. Are integrated. In FIGS. 9 and 10, the automatic closing device recovery wire W <b> 5 is connected to the tip of the operating rod 60. However, in this embodiment, it is noted that the automatic closing device recovery wire W <b> 5 is connected to the recovery mechanism 5. I want.

[B-1] Components of Automatic Closure Device and Operation The automatic closure device 6 includes an operating rod 60 supported so as to reciprocate in the first direction and the second direction, and the operating rod 60 in the first direction. The coil spring 61 that is energized, the solenoid 62 that is energized by the input of a fire detection signal, and the plunger 620 of the solenoid 62 are connected to each other. And a latch 63 that tilts (rotates) to a posture. The latch 63 is biased toward the first posture side by the coil spring 64.

The automatic closing device 6 includes a frame 65 including a horizontal piece 650 and a supporting portion that is U-shaped in a side view with vertical pieces 651 and 652 facing each other, and the operating rod 60 includes the vertical pieces 651 and 652. It is inserted and supported so that it can reciprocate. A contact piece 610 of the coil spring 61 is fixed to a predetermined portion between the vertical pieces 651 and 652 on the axis of the operating rod 60, and one end of the coil spring 61 is in contact with the vertical piece 651 and the other end is fixed. It is in contact with the contact piece 610. The solenoid 62 is mounted on the upper surface of the horizontal piece 650. Further, on the upper surface of the horizontal piece 65, two micro switches MS arranged in parallel and a rotation operation piece 66 for operating the micro switch MS are provided. The rotation operation piece 66 is biased toward the side where the microswitch MS is turned from OFF to ON. When the micro switch MS changes from the ON state to the OFF state, the fire detection signal applied to the solenoid 62 is cut off, and the disaster prevention panel 6B is notified that the automatic closing device 6 has been released.

One end of a brake release wire W1 (shown only in the upper diagrams of FIGS. 9 and 10) is fixed to the distal end of the operating rod 60 (the end opposite to the first direction). The shaft-shaped locking portion 630 of the latch in the first posture is locked in the locked groove 600 of the operating rod 60 in the biased state, whereby the operating rod 60 moves in the first direction. When the solenoid is energized by the input of a fire detection signal, the latch 63 tilts from the first position to the second position, and the locked state between the locking portion 630 and the locked groove 600 is changed. The actuating rod 60 moves in the first direction by the force of the coil spring 61, and the actuating portion 7 assumes the brake releasing posture via the wire W1 fixed to the tip of the actuating rod 60, so that the brake is released. The

As shown in FIG. 9, when the rotation operation piece 66 contacts the contact piece 610, the rotation is restricted and the micro switch MS is in the ON state. As shown in FIG. 10, once the automatic closing device 6 is actuated, the coil spring 61 is extended so that the contact piece 610 is separated from the rotation operation piece 66 and contacts the vertical piece 652. By rotating, the micro switch MS is turned OFF, and the energization to the solenoid 62 is cut off. The latch 63 is moved to the first posture side by the coil spring 64, and the shaft-like 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 Closure Device The recovery mechanism 5 of the automatic closure device 6 will be described with reference to FIGS. FIG. 22 shows the automatic closing device 6 to which the recovery mechanism 5 is connected, and FIG. 23 shows the recovery mechanism 5. The above description based on FIGS. 9 and 10 can be used as appropriate for specific elements and operations of the automatic closing device 6. As shown in FIG. 22, the recovery mechanism 5 is provided adjacent to the automatic closing device 6, so to speak, it is a recovery mechanism integrated automatic closing device. The base 67 of the automatic closing device 6 and the base 55 of the restoration mechanism 5 are integrated with screws by overlapping the rising pieces of L shape in side view, and the operating rod 60 and the restoration mechanism 5 of the automatic closing device 6 are integrated. The first lever 50 is connected and integrated. Although the automatic closing device 6 and the recovery mechanism 5 may be separated from each other, it is desirable to dispose the recovery mechanism 5 adjacent to the automatic closing device 6 from the viewpoint of movement interlocking 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 operating rod 60 of the automatic closing device 6, and is movable between a first position that is in a standby state integrally with the operating rod 60 and a second position that is in an operating state. is there. A brake release wire W1 is connected to the operating rod 60. The brake release wire W1 may be connected to the first lever 50, and the first lever 50 and the operating rod 60 may be formed from one member. The second lever 51 can be moved (rotated in the present embodiment) between the first posture and the second posture, and is connected to the automatic closing device restoration wire W5. When the first lever 50 moves from the first position to the second position, the second lever 51 permits and maintains the first posture without hindering this movement. After moving to the position 2, the second lever 51 is moved from the first position to the second position, whereby the first lever 50 and the operating rod 60 of the automatic closing device 6 are moved to the first position (standby position). It is configured to forcibly move to. The base 55 of the recovery mechanism 5 is provided with a stand 56 standing upright at an end portion on the side away from the automatic closing device 6, and an outer wire W1 'through which the brake release wire W1 is inserted, and an automatic closing device recovery wire W5. The end portions of the outer wires W5 'through which the wires are inserted are fixed. Hereinafter, a more specific configuration of the return device (return mechanism 5 + automatic closing device recovery lever 106) will be described in detail.

The first lever 50 is connected to the operating rod 60 of the automatic closing device 6 and reciprocates between the first position (standby state) and the second position (operating state) integrally with the operating rod 60. It is possible to move. A brake release wire W1 is connected to the operating rod 60, and the brake releasing wire W1 is movable in accordance with the movement of the operating rod 60 of the automatic closing device 6 and the first lever 50. 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 extending from the connecting portion with the operating rod 60 in the brake release wire W1 coincide with each other, and the automatic closing device 6 operates. Then, when the operating rod 60 and the first lever 50 of the automatic closing device 6 in the first position move to the second position, the brake release wire W1 is pulled and the brake is released.

The first lever 50 includes a first plate-like portion 500 extending along a horizontal plane, and a second plate-like portion 501 extending along a vertical plane, and the second plate-like portion 501 has a protruding piece 502 extending downward. Are formed integrally, and a lateral rectangular guide opening 503 is formed on the second plate-like portion 501 on the side away from the first plate-like portion 500. In addition, the direction of the surface of the 1st plate-shaped part 500 and the 2nd plate-shaped part 501 is not limited to the aspect of illustration. 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 brake releasing wire W <b> 1 is connected to the operating rod 60. The guide opening 503 is a laterally long hole extending in the moving direction of the first lever 50 and includes 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 protruding piece 502 includes 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 turning lever that can turn around a turning support shaft 53 on the base end side (the lower end side in the illustrated embodiment), and an automatic closing device recovery wire W5 is connected to the tip. Yes. In the illustrated embodiment, a vertical piece 530 that supports the rotation support shaft 53 is formed to rise with respect to the base 55. The second lever 51 is rotatable between a first inclined posture in which the distal end side is inclined toward the automatic closing device 6 and a second inclined posture in which the distal end side is inclined toward the side away from the automatic closing device 6. It has become. The second lever 51 is biased so as to maintain the first inclined posture by a spring 52 as a biasing means. Therefore, normally, the spring 52 is in the first inclined posture by the force of the spring 52, and the automatic closing device recovery wire W5 is pulled against the spring force, so that the rotation from the first inclined posture to the second inclined posture is performed. When the pulling force of the automatic closing device recovery wire W5 is released, the spring 52 automatically returns to the first inclined posture by the urging force of the spring 52.

On the base end side of the second lever 51, a guide shaft 54 is provided at a position slightly separated from the rotation support shaft 53 (a little upper in the illustrated embodiment). The guide shaft 54 is connected to the rotation support shaft 53. It extends in parallel. The guide shaft 54 is inserted through the guide opening 503. Depending on the posture of the second lever 51 and the position of the first lever 50, the guide shaft 54 has a first position on the automatic closing device 6 side in the guide opening 503. It is movable in the length direction of the guide opening 503 between the second position on the side away from the closing device 6. The relationship between the position of the guide shaft 54 in the guide opening 503, the attitude of the second lever 51, and the position of the first lever 50 will be described later.

FIG. 24 shows details of the spring 52 that is an urging means. The winding portion 520 of the spring 52 is externally mounted on the rotation support shaft 53, the first leg portion 521 is in contact with the base 55, and The two leg portions 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 inclined posture. By pulling the automatic closing device recovery wire W5, when the second lever 51 rotates from the first inclined posture to the second inclined posture, the spring 52 stores a force that returns to the original posture. When the pulling force of the automatic closing device recovery wire W5 is released, the second lever 51 is automatically returned to the first inclined posture by the stored force of the spring 52.

As shown in FIG. 36, the other end side of the automatic closing device restoration wire W5 having one end fixed to the tip of the second lever 51 extends into the second operation box 10B, and enters the second operation box 10B. It is guided horizontally through the provided pulley 107, and a T-shaped handle as an automatic closing device restoration lever 106 is provided at the end. The automatic closing device restoration wire W5 extends in the outer wire W5 ′ except for both end portions, and is also appropriately wound around a guide member (not shown) such as a pulley as required to be in the second operation box 10B. Will be guided to. When the activated automatic closing device 6 is restored, the second key means of the second operation box 10B is unlocked, the second lid 102 is opened, and the automatic stored in the second operation box 10B. By pulling the end of the automatic closing device recovery wire W5 with the closing device recovery lever 106 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 activated and the first lever 50 is in the second position, the guide shaft 54 contacts or is close to the second edge 5031 of the guide opening 503 on the side away from the automatic closing device 6. Thus, when the second lever 51 rotates from the first position to the second position, the position of the guide shaft 54 with respect to the rotation support shaft 53 moves. Move to position 1.

The operation of the automatic closing device 6 provided with the recovery mechanism 5 will be described with reference to FIG. As for the state of the automatic closing device 6, the upper diagram in FIG. 25 corresponds to FIG. 9, and the diagram in FIG. 25 corresponds to FIG. 10, and the description related to FIGS. Can do. The upper part of FIG. 25 shows the automatic closing device 6 in a standby state, and the brake is effective. The first lever 50 of the return mechanism 5 is in the first position on the side 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 The guide shaft 54 provided at 51 is in the first position on the automatic closing device 6 side in the length direction of the guide opening 503, and is in contact with or close to the first edge 5030. The first edge 5020 of the projecting piece 502 of the first lever 50 is separated from the contact portion 57 formed so as to rise from the base 55, and the second edge 5021 is separated from and close to the rotation support shaft 53. (See FIG. 24).

When the automatic closing device 6 operates in this standby state, the operating rod 60 of the automatic closing device 6 moves to the side away from the return mechanism 5, and the first lever 50 connected to the operating rod 60 moves to the automatic closing device 6 side. The wire W1 that 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 unit 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. The first lever 50 is allowed to move from the first position to the second position, and the first posture inclined toward the automatic closing device 6 is maintained. The figure in FIG. 25 shows the automatic closing device 6 in the actuated state, in a brake released state. The first lever 50 of the return mechanism 5 is in the second position approaching the automatic closing device 6 side, and the second lever 51 is maintained in the first posture inclined toward the automatic closing device 6 side, and the second lever The guide shaft 54 provided at 51 is in a second position on the side away from the automatic closing device 6 in the length direction of the guide opening 503, and is in contact with or close to the second edge 5031. The first edge portion 5020 of the protruding piece 502 of the first lever 50 is in contact with an abutting portion 57 formed so as to rise from the base 55.

The other end of the automatic closing device restoration wire W5 is connected to an automatic closing device restoration lever 106 provided in the second operation box 10B. When it is desired to restore the automatic closing device activated by the input of the fire detection signal, the second key means of the second operation box 10B is unlocked, the second lid 102 is opened, and the second operation box 10B is opened. The automatic closing device recovery lever 106 stored in the container is pulled out, and the end of the automatic closing device recovery wire W5 is pulled out and pulled through the pulley 107, whereby the second lever 51 in the first posture is moved to the second posture. Rotate. In conjunction with the rotation of the second lever 51 from the first position to the second position, 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 restoration wire W5, the operating rod 60 (and the first lever 50) moves from the second position to the first position while compressing the coil spring 61, and the shaft-like locking is performed. When the portion 630 moves while sliding on the upper edge 601 of the operating rod 60 and is locked in the locked groove 600 (see FIGS. 9 and 10), the latch 63 is in 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 in the second position, the guide shaft 54 is located on the second side 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 guide shaft 54 is in contact with the second edge 5031 when the second lever 51 rotates from the first posture to the second posture. Accordingly, the first lever 50 is moved to the first position by the guide shaft 54. As apparent from the comparison between the middle diagram in FIG. 25 and the lower diagram in FIG. 25, the guide shaft 54 is the automatic closing device in the middle diagram in FIG. The guide shaft 54 is located on the side away from the automatic closing device 6 in the lower part of FIG. The point of force by pulling the automatic closing device recovery wire W5 is the tip side of the second lever 51, and the point of action where the force acts when the second lever 51 rotates is the second edge 5031 of the guide shaft 54 and the guide opening 503. The distance from the rotation fulcrum 53 to the force point is larger than the distance from the rotation fulcrum 53 to the action point, and constitutes a so-called boosting mechanism. That is, by pulling the automatic closing device recovery wire W5 and rotating the second lever 51, the first lever 50 and the operating rod 60 are pulled by the boost mechanism. Compared with the case where 60 is pulled directly, the operating force can be reduced.

The lower part of FIG. 25 shows a state in which the automatic closing device recovery wire W5 is pulled to restore the automatic closing device 6, and a state in which a force for pulling the automatic closing device recovery wire W5 is applied. 2 in an inclined posture. At this time, a force that rotates from the second inclined posture to the first inclined posture is accumulated in the second lever 51 by the spring 52. When the force for pulling the automatic closing device restoration wire W5 is released, the second lever 51 is automatically returned to the first posture by the biasing force of the spring 52, and the monitoring state or the normal position shown in the upper diagram of FIG. It becomes.

[C] Actuator (brake release / reset device)
[C-1] Configuration of Actuator The configuration of the actuator 7 will be described with reference to FIGS. The operating unit 7 includes a frame 70, a first guide shaft 71 provided on the frame 70, a second guide shaft 72, a first operating body 73 movable on the first guide shaft 71, a first guide shaft 71, and a second guide. A second operating body 74 movable on the shaft 72, a third operating body 75 movable on the second guide shaft 72, a first micro switch SW1, and a second micro switch SW2 are provided. FIG. 11 shows the operating unit 7 in a steady posture (during normal electric opening / closing), and each element is in a steady position. FIGS. 12 and 13 show the movement of the operating unit 7 during electric lowering, FIGS. 14 and 15 show the movement of the operating unit 7 when the automatic closing device operates, and FIGS. 16 and 17 show the manual closing operation from the manual closing device. The movement of the action | operation part 7 is shown. Hereinafter, each element will be described in detail. In the following description, terms such as “up”, “down”, “left”, “right”, “vertical”, “horizontal” and the like representing the posture and direction of an element are descriptions based on the illustrated embodiment. Thus, it will be understood by those skilled in the art that it can be changed (for example, the top and bottom are interchanged and the left and right are interchanged) depending on the mounting posture of the actual element. In FIGS. 11 to 17, the first actuator 73 (brake release lever ML) moves to the left in the brake release direction, and the first operator 73 (brake release lever ML) moved to the left moves to the right. The movement is in the brake return direction. In addition, some elements are inscribed for easy viewing.

As shown in FIG. 18, the frame 70 includes an upper wall 700 and side walls 701 and 702 that hang down from the left and right ends of the upper wall 700. The upper wall 700 is formed with an opening 7000 that receives the tip portion of the brake release lever ML so as to be movable in the left-right direction. It is extended. Between the opposing side walls 701 and 702 of the frame 70, guide shafts 71 and 72 extending horizontally in parallel are provided. In the illustrated embodiment, a total of four guide shafts of two first guide shafts 71 and two second guide shafts 72 are provided, and the second guide shafts 72 are provided at both ends in the width direction of the frame 70. The first guide shafts 71 are arranged in a stepped manner in the height direction and are located inside the second guide shafts 72. By attaching a U-shaped cover body (not shown) that covers the frame 70 so as to cover it, the actuating section 7 is prepared as a box body, and the upper wall 700 is placed close to and opposite to the opening / closing machine M. It is attached.

As shown in FIG. 19, the first working body 73 includes an upper side 730 that extends horizontally, side sides 731 and 732 that hang downward from the left and right ends of the upper side 730, and the center of the lower end of the side side 732. It is composed of two horizontal bent sides 733 formed in the region, and through holes 7310 and 7320 through which the first guide shaft 71 is inserted are formed in the left and right side sides 731 and 732. One end of the first wire W <b> 2 constituting the 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 on the side 732, and a screw hole 7330 is formed on the bent side 733. The insertion groove 7321 is in communication with the groove between the respective bent sides 733, and has a locking portion at the end of the first wire W <b> 2 of the return wire above the bent side 733 (having a diameter larger than the groove width of the insertion groove 7321 ) And the plate 734 is fixed to the bent side 733 with screws 735 so as to cover the insertion groove 7321 between the bent sides 733 from below. A pressing piece 736 is projected from the central portion of the left side 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 figure) and in a second direction opposite to the first direction (right side in the figure). . The pressing piece 736 of the first operating body 73 in the steady position is separated from the brake release lever ML (may be close or in contact without pressing the brake release lever ML), and the brake of the switch M is It is in a valid state. When the first operating body 73 in the steady position moves in the first direction, the pressing piece 736 of the first operating body 73 presses the brake release lever ML in the first direction, and the brake of the switch M is released. release.

In the illustrated embodiment, the first operating body 73 in the steady position moves in the first direction when the second operating body 74 moves in the first direction and assumes a brake release posture. When the second operating body 74 moves in the first direction, when the automatic closing device 6 is operated, the third operating body 75 is moved in the first direction by the manual closing operation from the manual closing device 10. If so. When the first wire W2 of the return wire is pulled to the right side, the first operating body 73 in the brake release posture moves in the second direction and becomes the brake return posture (steady position). The first operating body 73 in the steady position moves in the second direction by pulling the first wire W2 of the return wire to the right side, and the first micro switch SW1 is turned from ON to OFF. That is, the first operating body 73 has a steady position (brake return position), a position moved from the steady position in the first direction (brake release position), and a position moved from the steady position in the second direction (obstacle detection position). ) Three positions.

As shown in FIG. 20, the second operating body 74 includes a horizontal 740 extending horizontally, side sides 741 and 742 extending perpendicularly to the left and right ends of the horizontal side 740, and a lower end of the side side 741. Insertion holes 7410 and 7420 through which the first guide shaft 71 is inserted are formed in the left and right side sides 741 (upper half part) and 742. An insertion hole 7411 through which the second guide shaft 72 is inserted is formed in the lower half portion of the side edge 741. One end of a brake release wire W <b> 1 extending from the automatic closing device 6 is fixed to the left side 741 of the second operating body 74. The first guide shaft 71 is covered with a coil spring (not shown) positioned 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 on the side side 741, and a screw hole 7430 is formed on the bent side 743. The insertion groove 7412 communicates with the groove between the bent sides 743, and an engaging portion (a diameter larger than the groove width of the insertion groove 7412) at the end of the wire W <b> 1 is positioned above the bent side 743. The plate 744 is fixed to the bent side 743 with screws 745 so as to cover the groove 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. In the steady position, the upper half portion of the side 741 of the second operating body 74 is in contact with the outside of the side 731 of the first operating body 73 from the left side, and the first coil spring is mounted on the first guide shaft 71. One end (left end) of 76 is in contact with the inside of the side 731 of the first operating body 73, and the other end (right end) of the first coil spring 76 is on the side 742 of the second operating body 74. It is in contact with the inside. When the second operating body 74 in the steady position moves in the first direction, the first operating body 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 in the second operating body 74 so that the second operating body 74 can be pulled in the brake releasing direction with the manual wire.

As shown in FIG. 21, the third operating body 75 has a U-shape in a side view when viewed from a bottom 750 extending horizontally and side sides 751 and 752 rising vertically from the left and right ends of the bottom 750 in an opposing manner. The left and right sides 751 and 752 are formed with insertion holes 7510 and 7520 through which the second guide shaft 72 is inserted. 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 side 750. The end portion of the wire W4 is a locking portion having a diameter larger than the groove width of the insertion groove 7521 and the groove portion 7500, and the locking portion at the end portion of the wire W4 is prevented from coming off. A screw hole 7501 is formed in the bottom 750 in the center in the width direction and in the vicinity of the side 732 so as to sandwich the groove 7500. The plate 753 is brought into contact with the bottom 750 so as to cover the groove 7500 from below, and the plate 753 is fixed to the bottom 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 752 of the third operating body 75 and the side wall 702 of the case 70, and the movement of the third operating body 75 to the right side is restricted. Members having a U-shaped cross-sectional view are provided at both ends in the width direction of the case 70, and contact pieces 703 are formed from the members (see FIG. 11). The left end portion of the second coil spring 77 sheathed on the second guide shaft 72 is in contact with the left side 751 of the third operating body 75, and the right end portion of the second coil spring 77 is the contact piece 703. Abut. In the steady position, the right side 752 of the third operating body 75 contacts the spacer 755, and the side 741 of the second operating body 74 contacts the outside of the left side 751 of the third operating body 75. Yes. 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 pulling force of the wire W4 is relaxed by the operation from the manual closing device 10, the second coil spring 77 extends and the third operating body 75 moves to the right, and accordingly, the second operating body 74, The first operating body 73 moves to the left (first direction).

The first micro switch SW <b> 1 is a detection unit that detects that an obstacle has been detected when the shutter curtain 1 is electrically lowered. The first micro switch SW1 is an obstacle detection micro switch that operates when an obstacle is detected. The contact is ON during monitoring (normal shutter opening / closing), and the contact is OFF when the micro switch is operating. It becomes. That is, it is assumed that the obstacle detection is performed when the first micro switch SW1 is turned off from the ON state when the shutter curtain 1 is electrically lowered. When the first micro switch SW1 is turned from ON to OFF during the electric lowering of the shutter curtain 1, an obstacle detection signal is input to the obstacle detection control panel 11A, and the electric lowering of the switch M is performed via the shutter control panel 11B. Stop. In the present embodiment, the first micro switch SW1 operates by turning from ON to OFF, but it will be understood by those skilled in the art that the first micro switch SW1 can be designed to be operated from OFF to ON.

The first micro switch SW1 is arranged at a predetermined position on the moving path of the first operating body 73 so that the first operating body 73 is switched from the ON state to the OFF state when the first operating body 73 in the steady position moves a predetermined amount in the second direction. 70 in predetermined portions (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 side 730 of the first actuating body 73 on the side side 732 side are parallel to the first guide shaft 71 and the edge portion 7300 and the edge portion 7300. And a recess 7301 formed on the first direction side (side away from the side 732). When the first operating body 73 is in the steady position and the brake release position, the first micro switch SW1 is in contact with the edge 7300 of the first operating body 73 and is in the closed posture (ON state), and the first operating body 73 is When moving from the steady position in the second direction, the first micro switch SW1 is positioned in the recess 7301 of the first operating body 73 and is in the open posture (OFF state).

The second micro switch SW2 is a means for detecting that the automatic closing device 6 has been operated or that a manual closing operation has been performed from the manual closing device 10. The second micro switch SW2 is a micro switch for prohibiting operation, and is operated when the automatic closing device 6 is operated or manually operated from the manual closing device 10. The contact is OFF during monitoring and the contact is opened during operation. It becomes ON. When the second micro switch SW2 is switched from OFF to ON, an operation confirmation signal is input to the obstacle detection control panel 11A. When the shutter curtain 1 is being electrically opened and closed, the switch M is connected via the shutter control panel 11B. And the push button operation is invalidated. In the present embodiment, the first micro switch SW1 operates by turning from OFF to ON, but it will be understood by those skilled in the art that the first micro switch SW1 can be designed to operate by turning from ON to OFF.

The second micro switch SW <b> 2 is provided so as to detect the movement of the movable element of the operation unit 7 during the manual closing operation from the manual closing device 10 when the automatic closing device 6 is operated. In this embodiment, since the second operating body 74 moves in the first direction from the steady position in both cases of the operation of the automatic closing device 6 and the manual closing operation from the manual closing device 10, the second micro The switch SW2 is positioned on the moving 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 a predetermined amount in the first direction. It is provided at the site. As shown in FIG. 18, a tongue-like piece 704 extending perpendicularly to the upper wall 700 is formed at the center in the left-right direction of the side edge of the upper wall 700, and a second piece is formed on the inner surface of the tongue-like piece 704. The micro switch SW2 is attached. The second micro switch SW2 is located on the movement path of one end of the right side 742 of the second operating body 74. When the second operating body 74 is in the steady position, the second micro switch SW2 and the second micro switch SW2 are connected to the second micro switch SW2. The switch SW2 is separated, and when the second operating body 74 in the steady position moves in the first direction, the side 742 presses and closes the second microswitch SW2, so that the second microswitch SW2 is turned off. Switches from ON to ON state.

[C-2] Movement of Actuator During Electric Lowering Obstacle detection during electric lowering will be described with reference to FIGS. 12 and 13. FIG. 12 shows the posture of each element of the operating unit 7 at the time of electric opening and closing, and each element is in a steady position. The first micro switch SW1 is ON and the second micro switch SW2 is OFF. FIG. 32A shows the posture of the rotating body 80 of the relay device 8 in the state of FIG.

FIG. 13 shows a state in which obstacle detection is performed during electric descent (the state of 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 slides from the steady position to the second direction while compressing the first coil spring 76. FIG. 32B shows the posture of the rotating body 80 of the relay device 8 in the state of FIG. In FIG. 32B, it can be seen that the second wire W3 of the return wire is pulled downward from the state of FIG. 32A, and the rotating body 80 is rotated to pull the first wire W2. By the sliding movement of the first operating body 73 in the second direction, the first micro switch SW1 is turned 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 switch M is stopped via the shutter control board 11B (in one embodiment, after the stop, the electric drop is temporarily stopped, that is, stopped. Touch up). In FIG. 13, the second operating body 74 and the third operating body 75 are in a steady position, and the second micro switch SW2 is in an 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 extends, and the first operating body 73 moves in the first direction. Then, it returns to the steady position, returns to the state of FIG. 12, and the first micro switch SW1 is turned from OFF to ON. FIG. 32C shows the posture of the rotating body 80 of the relay device 8 when the operating portion 7 returns to the state of FIG. 12, and is substantially the same as the posture of FIG. FIG. 13 shows a state in which the first operating body 73 is pulled to the limit position in the second direction, and when the first operating body 73 at the steady position actually moves slightly in the second direction. Thus, the first micro switch SW1 is activated and the shutter during the electric lowering is set to stop. If the return wires (the first wire W2 and the second wire W3) are pulled to the limit position shown in FIG. 13 and the seat plate 4 is further lowered, the lock drum 90 of the lock device 9 is moved to the lock drum 90 as will be described later. The second wire W <b> 3 wound three times is slipped and the second wire W <b> 3 is pulled out, so that the operating unit 7 and the relay device 8 are not damaged.

[C-3] Movement of Actuating Unit During Decreasing Weight (By Operation of Automatic Closure Device) Regarding the dead weight drop and obstacle detection of the shutter curtain 1 due to the operation of the automatic closure device 6, referring to FIGS. explain. When a fire is detected by the fire detector 6A, a signal (DC24V) is output from the disaster prevention panel 6B, the automatic closing device 6 is activated, and the brake release wire W1 is pulled. When the wire W1 is pulled to the left 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, and at the same time the right side 742 of the second operating body 74. Is moved in the first direction, via 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 switch M). Thus, the first operating body 73 at 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 731 of the first operating body 73 comes into contact with the brake release lever. The brake is released by moving this. FIG. 14 shows a state in which the brake is 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 from the steady position in the first direction, 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 steady position of FIG. 11 to the position of FIG. 14, the second micro switch SW2 is turned from OFF to ON, and an operation confirmation signal is transmitted to the obstacle detection control panel 11A for electric opening and closing. When the push button operation is disabled and the shutter curtain 1 is being electrically opened and closed, the movement of the shutter curtain 1 is stopped. The first micro switch SW1 is in the ON state.

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 first wire W2 of the return wire is pulled to the right, and the first coil spring 76 is compressed while performing the first operation. The body 73 moves to the right. When the pressing piece 736 at the upper part of the right side 731 of the first operating body 73 moves to the right side, the force that presses the brake release lever ML to the left side (brake release direction) is released, and the brake release lever ML is free. Thus, the brake and the brake release lever ML return by the return means built in the brake (FIG. 15). The shutter curtain that is falling under its own weight stops when the brake returns. 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 to the state shown in FIG. 14, the brake is released, and the shutter curtain. 1 drops again. FIG. 33C shows the posture of the rotating body 80 of the relay device 8 in the state of FIG. In FIG. 33 (C), it can be seen that the second wire W3 of the return wire is pulled downward from the state of FIG. 33 (B), and the rotating body 80 is rotated to pull the first wire W2. The state of FIG. 33C is the same as the steady position, and is substantially the same as FIG. 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 of FIG. 14 (during its own weight drop), and is substantially the same as the posture of FIG. 32 (B). is there. In the state of FIG. 15, the first micro switch SW1 remains in the ON state, and the second micro switch SW2 remains in the ON state.

When it is desired to restore the automatic closing device 6 once activated by the input of the fire detection signal to the monitoring posture, the automatic closing device recovery wire W5 is pulled in the second direction by operating the automatic closing device recovery lever 106. The operating rod 60 moves in the second direction while compressing the coil spring 61, and the shaft-like locking portion 630 moves while sliding on the upper edge 601 of the operating rod 60 to engage with the locked groove 600. By stopping, the latch 63 is in the first posture, the micro switch MS is turned on, the standby state shown in the lower diagram of FIG. 25 is entered, and the second lever 51 is returned to the monitoring shown in the upper diagram of FIG. State or steady position.

[C-4] Movement of Actuating Unit when Decreasing its Weight (by Manual Closing Operation from Manual Closing Device) Regarding the falling of the dead weight of the shutter curtain 1 and the obstacle detection by manual operation from the manual closing device, FIG. 16 and FIG. This will be described with reference to FIG. When the emergency closing switch 103 on the second lid body 102 of the second operation box 10B is pressed when the user wishes to close at any time, the side 752 of the third operating body 75 is pulled to the right in the figure from the state shown in FIG. When 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 is extended, the left end of the coil spring 77 moves to the left, The side wall 751 of the third operating body 75 is pushed to the left in the drawing, and the third operating body 75 moves to the left. By the side wall 751 pushed out to the left side, the side wall 741 of the second operating body 74 is pushed out to the left side, and the second operating body 74 moves to the left side. The right side 742 of the second operating body 74 is in contact with the right end of the first coil spring 76 from the right side, and the side 742 of the second operating body 74 moves to the right, whereby the first coil spring 76 is moved. Then, the side 731 of the first operating body 73 is pushed out to the left, and the pressing piece 736 of the side 731 moves the brake release lever ML to the left (first direction) to release the brake ( FIG. 16). At this time, since the total elastic force of the two first coil springs 76 is larger 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 springs In the state as it is, 76 overcomes the urging force of the brake release lever ML and moves to the left, and moves the brake release lever ML to release the brake. By releasing the brake, the shutter curtain 1 starts its own weight drop. FIG. 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 from the steady position in the first direction, 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 steady position in FIG. 11 to the position in FIG. 16 as the third operating body 75 moves in the first direction, the second micro switch SW2 changes from OFF to ON, and the obstacle An operation confirmation signal is transmitted to the detection control panel 11A, the push button operation from the manual operation unit becomes invalid, and the movement is stopped when the shutter curtain 1 is being electrically opened and closed. The first micro switch SW1 is in the ON state.

When the seat plate 4 at the lower end of the shutter curtain 1 falling under its own weight hits an obstacle and detects the obstacle, the wire W2 is pulled to the right and the first operating body 73 is moved to the right while compressing the first coil spring 76. Moving. When the pressing piece 736 on the right side 731 of the first operating body 73 moves to the right side, the force that presses the brake release lever ML to the left (brake release direction) is released, and the brake release lever ML becomes free. Then, the brake and the brake release lever ML are returned by the return means (spring member) built in the brake (FIG. 17). The shutter curtain that is falling under its own weight stops when the brake returns. 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 (first wire W2, second wire W3) can be pulled out, the first coil spring 76 extends to the state shown in FIG. 16, the brake is released, and the shutter curtain. 1 drops again. FIG. 33C shows the posture of the rotating body 80 of the relay device 8 in the state of FIG. In FIG. 33 (C), it can be seen that the second wire W3 of the return wire is pulled downward from the state of FIG. 33 (B), and the rotating body 80 is rotated to pull the first wire W2. The state of FIG. 33C is the same as the steady position, and is substantially the same as FIG. 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 of FIG. 16 (during its own weight drop), and is substantially the same as the posture of FIG. 32 (B). is there. In the state of FIG. 17, the first micro switch SW1 remains in the ON state, and the second micro switch SW2 remains in the ON state.

When the shutter curtain that has been manually lowered by weight is to be manually stopped again, the wire W4 connected to the third operating body 75 is moved to the right when the rotation lever 104 of the second operation box 10B is pulled forward. The third operating body 75 moves to the right while being pulled and compressing the second coil spring 77. In the state of FIG. 16, the extension force of the second coil spring 77 that holds the brake release lever ML in the brake release position is released by overcoming the return means (spring member) that moves the brake release lever ML in the return direction. The brake release lever ML moves to the right side 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 return (in detail, In FIG. 11, the brake release lever ML and the pressing piece 736 return to a state where they are in light contact with each other). The shutter curtain that is falling under its own weight stops when the brake returns. In this way, the brake release lever ML returns to the position shown in FIG.

In the present embodiment, in the obstacle detection when the dead weight is lowered, the first operating body 73 at the brake return position moves in the second direction to reach the steady position, so that the brake release lever ML is returned and the switch is opened. The brake of M is reset. Here, it is conceivable that the first operating body 73 moves further in the second direction beyond the steady position before the brake returns due to aging deterioration, adjustment error, or the like. At this time, the first micro switch SW1 is switched from the ON state to the OFF state by the movement of the first operating body 73 in the second direction. Here, even when the dead weight is being lowered, the obstacle detection signal is input to the obstacle detection control panel 11A. After the obstacle detection, it can be electrically controlled and stopped.

[D] Control Unit In the electric shutter with a mechanical hazard prevention apparatus according to the present invention, different control is performed in the electric open / close mode (normal mode) and the self-weight drop mode (fire mode). During normal electric opening and closing, the operation control of the shutter curtain 1 is performed in the normal mode. When the 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 is changed from the normal mode to the weight reduction mode, and the operation control of the shutter curtain 1 is performed in the weight reduction mode. In the present embodiment, the control unit includes an obstacle detection control panel 11A and a shutter control panel 11B. Details will be described below.

[D-1] Electric Open / Close Mode In the normal mode, the shutter curtain 1 is electrically opened / closed by the push button operation of the open / close operation switch 100. More specifically, when the opening switch U is pressed in the fully closed state or half open state of the opening, a signal is transmitted to the shutter control panel 11B via the obstacle detection control panel 11A, and the opening / closing machine M is activated to wind the winding. The take-up shaft 2 is rotated in the first direction and raised while winding the shutter curtain 1 (FIG. 37 (1)). When the shutter curtain 1 is raised, the second wire W3 is wound around the winding drum 91. When the shutter curtain 1 rises to a preset upper limit position, the upper limit switch is activated to stop the operation of the opening / closing machine M, the rotation of the winding shaft 2 is stopped, and the winding of the shutter curtain 1 is stopped. If the shutter curtain 1 does not stop at the upper limit due to a failure of the limit switch LS or the like, the rise of the shutter curtain 1 by the switch M is stopped by operating the emergency switch 18.

When the closing switch D is pressed in the fully open state or half open state of the opening, a signal is transmitted to the shutter control panel 11B via the obstacle detection control panel 11A, and the opening / closing machine M is operated to move the winding shaft 2 to the second position. The shutter curtain 1 is lowered by rotating in the direction (FIG. 37 (2)). When the shutter curtain 1 is lowered, the second wire W <b> 3 is drawn from the winding drum 91 while extending along the surface portion of the shutter curtain 1. When the lower seat plate 41 at the lower end of the lowering shutter curtain 1 hits an obstacle, the lower seat plate 41 moves upward relative to the upper seat plate 40, and the lock device 9 regulates 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, which is controlled to be pulled out, is pulled, and the first wire W2 is pulled via the relay device 8, so that the first operating body is moved. 73 moves from the steady position in the second direction (right side in the figure), the first micro switch SW1 is turned from ON to OFF, and an obstacle detection signal (seat plate operation signal) is transmitted to the obstacle detection control panel 11A. The The obstacle detection control panel 11A that has received the obstacle detection signal stops the operation of the switch M for a predetermined time (for example, 1 second) via the shutter control panel 11B, and then operates the switch M to operate the shutter curtain. 1 is raised for a predetermined time (for example, 1.5 seconds) (touch-up) and then stopped ((3) in FIG. 37). Thereafter, 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 seat plate 41 of the lower end of the shutter curtain 1 that is electrically lowered is landed, the lower seat plate 41 is moved upward relative to the upper seat plate 40, and the lock device 9 restricts the drawing of the second wire W3, When the upper seat plate 40 moves downward relative to the lower seat plate 41, the second wire W <b> 3 whose withdrawal is restricted is pulled, the first wire W <b> 2 is pulled via the relay device 8, and the first operating body 73. Moves from the steady position in the second direction (right side in the figure), the first micro switch SW1 is turned from ON to OFF, and an obstacle detection signal is transmitted to the obstacle detection control panel 11A. The control panel for obstacle detection 11A that has received the obstacle detection signal stops the operation of the switch M and stops the descent of the shutter curtain 1 via the shutter control board 11B (FIG. 37 (2)). The timer is activated when the shutter curtain 1 is lowered to a preset lower limit position during electric lowering, and the touch-up is not performed when an obstacle detection signal is output during the timer operation. If the obstacle detection signal is not output during the 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 winding shaft 2 rotates. To stop. In particular, when a sensitive setting is made such that the first micro switch SW1 operates at a position where the first operating body 73 slightly moves, the weight of the second wire W3, the friction between the second wire W3 and the lock drum 90, The second wire W3 is instantaneously pulled down by the force of the mainspring spring housed in the winding drum 91, the inertia of each device, etc., and the first operating body 73 moves in the second direction at the start of the electric descent. It is also conceivable that the first micro switch SW1 operates. For this reason, the control device has a function of preventing control such as stopping when the first micro switch SW1 is operated within a certain period of time immediately after the start of the electric descent. In order to prevent malfunctions such as accidentally ignoring obstacles at the time of subsequent re-descent, a function to extend the operation time of reverse rise after detecting obstacles and temporarily stopping is provided as necessary It can be selected.

[D-2] When the automatic closing device 6 is activated by the input of the fire detection signal from the self-weight drop mode disaster prevention panel 6B, the wire W1 is pulled so that the second operating body 74 is moved from the steady position to the first direction (in the drawing). The first operating body 73 moves in the first direction as the second operating body 74 moves in the first direction, and the brake is released. When the tension of the wire W4 is relieved by the pressing operation of the emergency closing switch 103 of the second operation box 10B, the third operating body 75 moves from the steady position to the first direction (left side in the drawing), and the first As the three operating bodies 75 move 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 operating body 74 moves from the steady position in the first direction, and the second micro switch SW2 is turned from OFF to ON, an operation confirmation signal is continuously output from the operating section 7 to the obstacle detection control panel 11A. Then, the obstacle detection control panel 11A changes from the electric open / close mode (normal mode) to the self-weight drop mode (fire mode) by receiving the operation confirmation signal. When the obstacle detection control panel 11A enters the dead weight lowering mode, the electric opening / closing operation (the 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 invalidated. .

When the lower seat plate 41 at the lower end of the shutter curtain 1 that is falling under its own weight hits an obstacle, the lower seat plate 41 moves up relative to the upper seat plate 40 and the lock device 9 restricts the second wire W3 from being pulled out. Then, 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, the first wire W2 is pulled via the relay device 8, and the brake release position. The first actuating body 73 that has moved to the second position moves in the second direction toward the steady position, the brake of the switch M is restored, and the shutter curtain 1 that is dropping its own weight stops. When the obstacle is removed, the lower seat plate 41 that has moved upward is allowed to move downward, the restriction of pulling out the second wire W3 is released, the first coil spring 76 is extended, and the first operating body 73 is braked. After moving to the release position, the brake of the switch M is released by the brake release lever ML, and the shutter curtain 1 is lowered again by its own weight ((3) in FIG. 38). When the lower seat plate 41 at the lower end of the shutter curtain 1 under its own weight descends, the lower seat plate 41 moves upward relative to the upper seat plate 40, and the lock device 9 restricts the drawing 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, which is controlled to be pulled out, is pulled, and the first wire W2 is pulled via the relay device 8, so that the first operating body is moved. 73 moves from the brake release position to the steady position, and the brake returns. The brake of the opening / closing machine M is restored, and the shutter curtain 1 under its own weight is stopped and fully closed (FIG. 38 (3)).

If the first operating body 73 further moves in the second direction beyond the steady position before the brake returns due to aging deterioration, adjustment error, etc., the first micro switch SW1 is turned from ON to OFF. Thus, the obstacle detection signal is transmitted to the obstacle detection control panel 11A (at the time of a power failure, the obstacle detection signal is not transmitted). At this time, if energization is effective when the dead weight is lowered, the obstacle detection control panel 11A that has received the obstacle detection signal operates the switch M via the shutter control panel 11B to open the shutter curtain 1. Alternatively, it may be stopped after being raised 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 self-weight lowering mode is (when only the automatic closing device 6 is activated or when both the automatic closing device 6 and the manual closing device are activated, the automatic closing device 6 is restored. When it is in operation, the second operating body 74 of the operating unit 7 returns to the steady position by returning the manual closing device, and the second micro switch SW2 is changed from the ON state to the OFF state, thereby changing 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 self-weight drop mode to the electric open / close mode, and the operation is restored by the operation. You may make it do.

When the automatic closing device 6 performs the brake releasing operation while the shutter curtain is electrically lifted, the second operating body 74 and the first operating body 73 in the steady position move in the first direction, and the second micro switch SW2 is moved. When the second micro switch SW2 is turned on from the OFF state, an operation confirmation signal is input to the obstacle detection control panel 11A, and the obstacle detection control panel 11A lowers its own weight from the electric open / close mode (normal mode). The mode is changed to the mode (fire mode), and simultaneously with the input of the operation confirmation signal, the driving of the switch M is stopped via the shutter control panel 11B, and the shutter curtain starts its own weight drop (FIG. 38 (1)). When the automatic closing device 6 releases the brake during the electric lowering of the shutter curtain, the second actuating body 74 and the first actuating body 73 in the steady position move in the first direction, and the second micro switch SW2 is moved. When the second micro switch SW2 is turned on from the OFF state, an operation confirmation signal is input to the obstacle detection control panel 11A, and the obstacle detection control panel 11A changes from the electric open / close mode (normal mode) to the self-weight drop mode. While changing to (fire mode), simultaneously with the input of the operation confirmation signal, the driving of the switch M is stopped via the shutter control panel 11B, and the shutter curtain starts to lower its own weight ((2) in FIG. 38).

[E] Configuration of Seat Plate The configuration of the seat plate 4 provided with obstacle detection means will be described. The seat plate 4 provided at the lower end of the shutter curtain includes an upper seat plate 40 and a lower seat plate 41 that can be moved upward relative to the upper seat plate 40. In this embodiment, the upper seat plate 40 includes a top surface 400, left and right side surfaces 401 that hang from both ends in the width direction of the top surface 400, and a covering that extends horizontally in a direction approaching each other from the lower ends of the left and right side surfaces 401. The left and right horizontal contact pieces 411 on the upper end of the lower seat plate 41 are placed on the contact pieces 402 of the upper seat plate 40, thereby lowering the lower seat plate with respect to the upper seat plate 40. 41 is suspended (see FIGS. 41 and 43). In the posture in which 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 comes into contact with 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 in the length direction of the seat plate 4 between the upper seat plate 40 and the lower seat plate 41 constituting the seat plate 4. Therefore, the lower end of the shutter curtain 1 during electric descent or under its own weight abuts against an obstacle so that the lower seat plate 41 is in contact with the upper seat plate 40. The detection lever 42 rotates in conjunction with the upward movement of the lower seat plate 41. The plurality of detection levers 42 are connected to each other by a wire 43, and one end of the wire 43 is connected to a lower end side of a first rotation lever 92 (described later) constituting a lock mechanism of the lock device 9 via a coil spring 98. Has been. When the lower seat plate 41 moves up relative to the upper seat plate 40, the detection lever 42 rotates in a direction in which the lower end of the detection lever 42 is separated from the lock drum 90 of the lock device 9, and the wire 43 is moved to the lock device. 9 is pulled away from the lock drum 90.

When the wire 43 is pulled and the first rotation lever 92 is rotated, the lock mechanism 90 is controlled by a lock mechanism (details will be described later) of the lock device 9, and the lock device 9 is moved while the shutter curtain 1 is being lowered. The drawing out of the second wire W3 drawn out from is stopped, and the shutter curtain 1 descends, whereby the second wire W3 is drawn downward, and the first wire W2 is drawn through the relay device 8. The first actuating body 73 moves to the brake return position, the pressing 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 being lowered is released. Stop.

It should be noted that the above-described configuration of the obstacle detection means of the seat plate 4 is one embodiment and does not limit the scope of rights of the present invention. For example, the obstacle detection means detects an upward movement of the lower seat plate 41 by using a detection body rotatably provided between the upper seat plate 40 and the lower seat plate 41 constituting the seat plate 4. The shape and the number of the detection bodies are not limited to those shown in the drawing, and the detection bodies may be ones that do not use the wires 43 (for example, the detection bodies are rotating bodies that extend in the length direction of the seat plate).

[F] The configuration of the locking device 9 will be described in detail with reference to FIGS. 26 and FIGS. 27 to 30 have different parts in the shape of the elements, but the components themselves are the same. In addition, reference numerals of the elements are described in most detail in FIG. 27, and should be referred to as appropriate. The lock device 9 includes a rotatable lock drum 90, a rotatable winding drum 91, a first rotation lever 92, a second rotation lever 93, and a third rotation lever 94. And a case 95. In the present embodiment, the lock drum 90 is located directly below the relay device 8, and the take-up drum 91 is disposed adjacent to the first side of the lock drum 90, The second rotation lever 93 and the third rotation lever 94 are disposed adjacent to the second side of the lock drum 90. In the normal state, the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 are in the first posture (unlocked posture) (see FIGS. 26 and 30). When the shutter is stopped due to obstacle detection, the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 are in the second position (lock position) (see FIG. 27). 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 to rotate (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 the lower surface is open. 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 take-up drum 91 so as to face the rear plate 953 with the lock drum 90 and the take-up drum 91 interposed therebetween. The front plate 954 ′ extends so as to cover at least the front side of the central portion of the lock drum 90 and the take-up drum 91 (the portion 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 and right sides, the upper bent piece is brought into contact with the upper plate 950, and the right bent piece is brought into contact with the side piece 952 and screwed into the case 95. 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 the cantilever support. In the mode shown in FIG. 26, the guide portion 958 for inserting the wire W3 extending between the lock drum 90 and the take-up drum 91 is formed in 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 seat plate 40 using 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, in the thickness direction of the peripheral surface 901). And a plurality of tooth-like locked portions 903 formed continuously at the periphery of the disc portion 902 having a diameter larger than that of the peripheral surface 901. In one aspect, the circumferential dimension of the peripheral surface 901 is such that the wire can be wound three times in parallel.

The winding drum 91 is a support shaft 910 that rotatably supports the winding drum 91, a peripheral surface 911 that winds the wire, and a means for urging the winding drum 91 in the winding direction of the wire. A mainspring (not shown).

The first rotation lever 92 is a rotation piece extending in the vertical direction, and includes an upper first portion 920 and a second portion 921 extending downward with a slight angle with respect to the first portion 920. And a rotation fulcrum 922 (formed by a support shaft P1 projecting from the rear plate 953 of the case 95) formed at the connecting portion between the first portion 920 and the second portion 921. The case 95 is movably provided.

The first turning lever 92 is centered around the turning fulcrum 922, in the first direction (locking direction) in which the upper first portion 920 approaches the lock drum 90, and the upper first portion 920 is in the lock drum 90. It is possible to turn in the second direction (the unlocking direction) of the direction away from the head. At the time of normal opening / closing and stopping, the first rotation lever 92 is in a first posture in which the upper first portion 920 is rotated to the side 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 turning lever 92 is in the second posture in which the upper first portion 920 is turned to the side close to the lock drum 90 (see FIG. 27).

The first turning lever 92 is urged in the second direction by a coil spring 96 exemplified as an urging 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 a first rotating lever. The upper end of the first portion 920 of the 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 rotation lever 92 is in the first posture, the first portion 920 of the first rotation lever 92 is 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 rotation lever 92 extends downward from the lower end of the case 95, and a hook-shaped locking portion 92A (see FIG. 26) is formed at the lower end. The end portion of the wire 43 (when the coil spring 98 (see FIGS. 39 and 40) is connected to the end portion of the wire 43), the end portion of the coil spring 98 is detachably locked to the locking portion 92A. Has been. When pulled by the wire 43 in conjunction with the upward movement of the lower seat plate 41, the first rotation lever 92 overcomes the urging force of the coil spring 96 and rotates in the first direction. The locking portion 92A is opposite to the opening formed on the opposite side of the lower end side of the first rotation lever 92 from the side on which the wire 43 extends, the groove portion extending downward from the opening, and the side on which the wire 43 extends by the groove portion. And a bottom portion of the groove portion slightly bulges to the wire 43 side, and an upper end of the rising portion is formed thick adjacent to the opening. The shape of the locking portion 92A is formed so that the wire 43 does not come off from the locking portion 92A regardless of the rotation posture of the first rotation lever 92 during operation of the mechanical harm prevention apparatus. Has been. This is advantageous because the end of the wire 43 can be removed from the locking 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, and the short side 931 and the long side 932 are opposed to the lock drum 90. The case 95 is provided so as to be rotatable about a rotation fulcrum 933 (formed by a support shaft P1 projecting from the rear plate 953 of the case 95) formed close to the apex located on the lower side. is there. In the illustrated embodiment, the rotation fulcrum 933 of the second rotation lever 93 and the rotation fulcrum 922 of the first rotation lever 92 are formed from a common support shaft P1. A locking portion 934 is formed in proximity to the apex formed by the short sides 930 and 931, and a contact portion 935 is formed in proximity to the long side 932 so as to be separated from the locking portion 934. A contact portion 936 is formed in the vicinity of the apex formed by the short side 930 and the long side 932. The locking portion 934 of the second rotation lever 93 has a shape that can be engaged and disengaged with the locked portion 903 (gear of the gear) of the lock drum 90.

In the present embodiment, the second rotation lever 93 includes two opposing plates, the support shaft P1 is provided between the two plates, and the locking portion 934 connects the two plates. The abutting portion 935 is a pin that connects the two plates, and the abutting portion 936 is rotatably mounted on the pin that connects the two plates. It is a bearing. In addition, the structure which consists of two plates is only one aspect of the 2nd rotation lever 93. FIG.

The second rotation lever 93 is rotatable about a lower rotation fulcrum 933 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. It has become. During normal opening / closing and stopping, the second turning lever 93 is in the first posture in which the upper side is turned to the side away from the lock drum 90 (see FIGS. 26 and 30), and the lock device 9 is in the locked state. The second turning lever 93 is in the second posture in which the upper side is turned to the side close to the lock drum 90 (see FIG. 27). When the second rotation lever 93 is in the first posture, the locking portion 934 is in the non-locking state separated from the locked portion 903 of the lock drum 90, and the contact portion 935 includes the first locking lever 934. A portion of the first portion 920 of the rotating lever 92 on the side close to the locking device is in contact. When the second rotation lever 93 is in the second posture, the locking portion 934 is locked with the locked portion 903 of the lock drum 90. When the locking portion 934 of the second rotation 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 lock device 9 is restricted from pulling out the wire W3. Locked.

The second turning lever 93 is urged in the second direction by a coil spring 97 exemplified as an urging 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 in the vicinity of the lower end of the left side plate 951 of the case 95, and the other end is a second rotating lever. 93 is connected to the abutting 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. In the illustrated embodiment, the pin that forms the contact portion 935 also serves as the connecting portion at 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 ′).

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

The third rotation lever 94 is a member that is positioned above the first rotation lever 92 and the second rotation lever 93 and extends in the lateral direction, and is in a locked state (second posture). It is a rotation restricting means for restricting the rotation of the lever 93 in the second direction, in other words, a holding lever that holds the locked state of the second rotation lever 93 for a predetermined time after the obstacle is removed. The third rotation lever 94 is provided in the case 95 so as to be rotatable with an end portion on the side close to the lock drum 90 as a rotation fulcrum 940, and an end portion on the side far from the lock drum 90 is rotated in the vertical direction. It is possible. The pivot fulcrum 940 is formed from a support shaft P4 that protrudes from the rear plate 953 of the case 95.

When the first rotation lever 92 and the second rotation lever 93 are in the first posture, the third rotation lever 94 has a tip that is the end far from the lock drum 90 at the first position (upper side). When the first rotation lever 92 and the second rotation lever 93 are in the second posture, the tip is rotated to the second position (lower side). It is in the 2nd attitude | position which moved (refer FIG. 27).

A lower portion of the third rotation lever 94 extending in the lateral direction has the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 when the lock device 9 is in a locked state. A locking portion 941 that locks with the contact portion 936 of the second rotation lever 93 when in the second posture is formed. A contact portion 942 is formed at a lower portion of the third rotation lever 94 so as to be positioned on the distal end side with respect to the locking portion 941.

In the present embodiment, the third rotation lever 94 includes two opposing plates, the support shaft P4 is provided between the two plates, and the locking portion 941 is between the tips of the two plates. The abutment portion 942 is a bearing that is rotatably mounted on a pin that connects the two plates. The configuration composed of two plates is only one aspect of the third rotation lever 94, and the locking portion 941 may be integrally formed. In the illustrated embodiment, the locking portion 941 has a stepped shape when viewed from the side, but the shape of the locking portion 941 is not limited and may be a claw shape or a protrusion shape.

When the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 are in the first posture, the corner portion of the locking portion 941 of the third rotation lever 94 is the second rotation lever 93. The third rotation lever 94 is restricted from rotating downward, and the first posture is maintained. From this state, when the second rotation lever 93 rotates in the first direction, the contact portion 936 of the second rotation lever 93 gets over the corner of the locking portion 941 of the third rotation lever 94. At the same time, the third rotation lever 94 rotates downward, and the contact portion 936 of the second rotation lever 93 is locked to the locking portion 941.

As shown in FIG. 27, when the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 are in the second posture, the contact portion 936 of the second rotation lever 93 is the third position. The abutment portion 923 formed on the upper end of the first rotation lever 92 is opposed to the engagement side 9410 of the engagement portion 941 of the rotation lever 94, and the contact portion 942 of the third rotation lever 94. Abut. The contact state of the contact portion 923 of the first rotation lever 92 and the contact portion 942 of the third rotation lever 94 and the engagement of the contact portion 936 of the second rotation lever 93 and the third rotation lever 94 When the portion 941 is opposed to the locking side 9410 (see FIG. 27) or in the locked state (see FIG. 28), at least the first rotation lever 92 rotates a predetermined amount from the second posture to the second direction. It is maintained while you do. When the third rotation lever 94 in the second posture rotates upward by a predetermined amount, the locking portion 941 of the third rotation lever 94 and the contact portion 936 of the second rotation lever 93 are locked. Is released, the rotation restriction by the third rotation lever 94 is released, and the second rotation lever 93 in the second posture is rotated in the second direction by the force of the coil spring 97.

A circumferential projection piece 943 is formed on the distal end side of the third rotation lever 94, and when the third rotation lever 94 is in the first position, the projection piece 943 contacts the left side piece 951. The third turning lever 94 is restricted from turning further upward. This prevents the third turning lever 94 from jumping up when it is turned from the second posture to the first posture.

The operation of the locking device will be described. When the shutter curtain 1 starts to descend, the lock device 9 (lock drum 90, take-up drum 91) provided on the seat plate 4 also descends as the seat plate 4 descends, and as the lock device 9 descends, Overcoming the force of the mainspring spring, the second wire W3 is pulled out along the surface of the shutter curtain 1 by the 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 lowering shutter curtain 1 comes into contact with an obstacle, the lock device 9 is interlocked with the lower seat plate 41 moving upward relative to the upper seat plate 40. It operates so that the rotation of 90 is restricted. When the lower end of the shutter curtain 1 that is falling under its own weight comes into contact with an obstacle and the lower seat plate 41 moves up 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 a wire 43, and one end of the wire 43 is connected to the first rotation lever 92 via a coil spring 98. When the lower seat plate 41 moves up relatively with respect to the upper seat plate 40, the detection lever 42 rotates in a direction away from the lock drum 90 and pulls the wire 43 in a direction away from the lock drum 90. The rotation lever 92 rotates from the first posture to the second posture.

When the first rotation lever 92 rotates in the first direction from the first posture shown in FIG. 26, the first portion 920 of the first rotation lever 92 contacts the contact portion 935 of the second rotation lever 93. By pressing while in contact, the second turning lever 93 in the first position turns together with the first turning lever 92 in the first direction, and the locking portion 934 of the second turning lever 93 is moved. Is locked to the tooth-like locked 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 rotation lever 94 in the first posture is brought into contact with the contact portion 936 of the second rotation lever 93 in the first posture, so The rotation is restricted. The second rotating lever 93 in the first posture rotates in the first direction together with the first rotating lever 92, so that the contact portion 936 of the second rotating lever 93 is moved to the third rotating lever 94. At the same time as it gets over the corner portion of the locking portion 941 and locks to the locking portion 941, the third rotation lever 94 rotates downward under its own weight and assumes the second posture (FIG. 27).

When the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 are in the second posture, the second posture of the first rotation lever 92 is held by the pulling force of the wire 43. The second posture of the second turning lever 93 is maintained by the first portion 920 of the first turning lever 92 in the second posture coming into contact with the contact portion 935 of the second turning lever 93. The second posture of the third rotation lever 94 is held by the contact portion 923 of the first rotation lever 92 coming into contact with the contact portion 942 of the third rotation lever 94. Accordingly, when the wire 43 is pulled, that is, in the obstacle detection state, the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 maintain the second posture and are locked. The device 9 is in a locked state, and the rotation of the lock drum 90 is restricted.

When the rotation of the lock drum 90 is stopped, the withdrawal of the second wire W3 is restricted and the length of the second wire W3 becomes constant. In this state, the upper seat plate 40 (that is, the lock drum 90) is lowered with respect to the lower seat plate 41. Then, the first wire W2 is pulled through the second wire W3 and the relay device 8, and the first operating body 73 slides in the second direction. In the case of the electric descent, the first operating body 73 at the steady position moves in the second direction, the first micro switch SW1 is turned from ON to OFF, and the obstacle detection signal (seat plate operation signal) is detected as an obstacle. The driving of the switch M is stopped by the obstacle detection control panel 11A and the shutter control panel 11B which are transmitted to the control panel 11A and receive the obstacle detection signal, and the descent of the shutter curtain 1 is stopped. When the dead weight is being lowered, the first operating body 73 in the brake release position moves to the steady position (brake return position), the brake release lever ML returns, the brake returns, and the winding shaft 2 The descent of the shutter curtain 1 is stopped by restricting the rotation.

Here, in order to return to the brake, the return wires (the first wire W2 and the second wire W3) need to be pulled 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 41 has an upward movement stroke corresponding to the amount of lowering of the shutter curtain 1 that only causes the brake to return. Further, in addition to the upward movement stroke, it is desirable that the lower seat plate 41 has a margin stroke that allows the upper seat plate 40 to move upward relatively. With this margin stroke, when an obstacle comes into contact with the lower seat plate 41, only the load of the lower seat plate 41 can be applied to the obstacle, and the load of the entire shutter curtain is prevented from acting on the obstacle. . Here, although it is known that the seat plate 4 is configured from the lower seat plate 41 that moves upward relative to the upper seat plate 40, in this embodiment, the movable distance of the lower seat plate 41 relative to the upper seat plate 40. Is larger than the conventional movable distance. Specifically, the relative possible distance of the lower seat plate 41 with respect 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 that falls by its own weight hits an obstacle. 2 A first movement amount (for locking) until the rotation lever 93 is locked to the lock drum 90 to restrict the rotation of the lock drum 90 and to restrict the withdrawal of the return wire stored in the winding drum 91. And the upper seat plate 40 is moved downward relative to the lower seat plate 41 in a state where the return wire is restricted from being pulled out. The second movement amount (requires pulling the return wire downward after locking) until the brake is returned by pulling the return wire with the drawer regulated downward, and the shutter car by the brake return Third moving amount of down 1 down to allow the upward movement of the lower seat plate 41 against the upper seat plate 40 after stopping the (alleviate a load that will act on the obstacle), consists of a total of. In connection with pulling the return wire, even when the upward movement stroke of the lower seat plate 41 is small, it operates with the return wire (for example, the relay device 8) or the return wire (first wire W2). Brake is provided by providing a mechanism (for example, a link mechanism) that is positioned at a portion connected to the operating mechanism of the portion 7 and extracts a pulling amount of the operating mechanism (brake release body) that is large with respect to the upward stroke of the second wire W3. Can be restored.

When the lower seat plate 41 moves down after the obstacle is removed and the wire 43 is not pulled, the first turning lever 92 in the second posture starts to turn in the second direction by the force of the coil spring 96. To 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 rotation lever 92 has a concave arcuate surface, and slides with respect to the peripheral surface of the contact portion 942 of the third rotation lever 94 in the initial rotation. The first rotation lever 92 starts to rotate in the second direction, while the second rotation lever 93 maintains the second posture (locked state) (FIG. 28). As can be seen from a comparison between FIG. 27 and FIG. 28, the second posture is within the range of play in the locked state between the contact portion 936 of the second rotating lever 93 and the locking portion 941 of the third rotating lever 94. When the first rotation lever 92 located in the second direction is rotated in the second direction, the second rotation lever 93 is also slightly rotated in the second direction, but the locked state is maintained, and the second rotation The locking portion 934 of the moving lever 93 and the locked portion 903 of the lock drum 90 are in a locked state.

When the first rotation lever 92 rotates a predetermined amount, the contact portion 923 of the first rotation lever 92 abuts against the contact portion 942 of the third rotation lever 94 to act, and the third rotation lever The abutment portion 942 on the tip end side of 94 is pushed upward in conjunction with the turning of the first turning lever 92, and when the third turning lever 94 is pushed up by a predetermined amount, the third turning lever 94 is locked. The engagement state between the portion 941 and the contact portion 936 of the second rotation lever 93 is released (the second rotation lever 93 is kept locked until just before the engagement state is released), and the second 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 the locked state is released. FIG. 29 shows a state immediately before the lock state is released. When the contact portion 942 of the third rotation lever 94 is completely pushed up by the contact portion 923 of the first rotation lever 92 from the state of FIG. 29, the contact portion 936 of the second rotation lever 92 and the third turn The locking state of the moving lever 94 with the locking portion 941 is released, and at the same time, the second rotating lever 93 is instantaneously rotated in the second direction by the coil spring 97, so that the locking portion 934 becomes the lock drum 90. The lock drum 90 can be rotated by being disengaged from the locked portion 903 (FIG. 30).

In the present embodiment, the second wire W3 is divided into a lock drum 90 and a take-up drum 91 and wound up. When both a wire winding mechanism and a locking mechanism are provided on one rotating body (although this aspect is 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 possibility that a so-called winding drawing may occur due to the outer wire biting into the broken wire. When a wire drawing is generated in the wire, there is a possibility of affecting the smooth feeding and winding of the wire. In the present embodiment, the second wire W3 is first wound around the lock drum 90 and then wound around the take-up drum 91, and the force that can be generated on the second wire W3 is the lock drum 90. It comes to act on. Here, since the second wire W3 is wound once on the peripheral surface 901 of the lock drum 90 (three windings in parallel), even if a force acts on the second wire W3, the rotating lock drum 90 rotates. Even if it stops suddenly, the wire is not drawn. Further, a plurality of second wires W3 are wound around the lock drum 90 to prevent the second wire W3 from slipping on the peripheral surface 901 of the lock drum 90, and the lock drum 90 and the take-up drum 91 rotate together. It is like that. The winding drum 91 has a built-in mainspring spring that urges the second wire 3 in the winding direction. Therefore, even if the lock drum 90 is locked and the rotation stops, the second wire W3 is loosened. Does not occur. Further, when the shutter curtain 1 is raised in the locked state, the second wire W3 wound three times around the lock drum 90 is loosened, but the loosened second wire W3 is transferred to the winding drum 91 incorporating the mainspring spring. Since it is wound up, the second wire W3 is not loosened. The touch-up of the shutter curtain 1 at the time of obstacle detection can be performed without waiting for the unlocking delayed by the delay mechanism, and the time from when the shutter curtain 1 stops until the touch-up can be shortened. it can. Further, when the obstacle is detected, the second wire W3 is pulled downward by the frictional force of the second wire W3 wound around the lock drum 90. However, if the obstacle is detected, a large downward direction exceeding the frictional force in the locked state is assumed. When the force acts, the second wire W3 wound three times around the lock drum 90 slides and lowers the shutter curtain 1, thereby preventing the second wire W3 from being cut.

The lower end of the first rotation 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, 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 41 hitting the obstacle is engaged with the second rotation lever 93. Even after the stop portion 934 is locked to the tooth-like locked portion 903 of the lock drum 90, it is necessary to move up relatively. At this time, the coil spring 98 is extended, so that 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. Has eased. More specifically, after the lock (after the locking portion 934 is locked to the locked portion 903), the upper seat plate 40 is further moved downward with respect to the lower seat plate 41, so that only the amount moved downward is reached. The return wire is pulled down. At the same time, the lower movement of the upper seat plate 40 causes the detection lever 42 to rotate further upward, and the wire 43 is further pulled. At this time, the coil spring 98 is extended to lock the second rotation lever 93. The portion 934 is prevented 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 rights of the present invention. In the illustrated embodiment, the lock drum 90 and the take-up drum 91 are adjacent to each other. However, the lock drum 90 and the take-up drum 91 are separated from each other (as a non-limiting example, the radial dimension to the diameter dimension of these drums). You may arrange. In the present embodiment, the lock drum 90 and the take-up drum 91 are provided separately, and the description has been made based on the configuration in which the lock drum 90 is locked. As described in Japanese Patent No. 13647), the lock drum and the winding drum may be integrated. In the illustrated embodiment, the first rotation lever 92, the second rotation lever 93, the third rotation lever 94, and the detection lever 42 are disposed only on one side of the lock drum 90. And a pair of left and right first rotation levers connected to the wires connected to the respective detection levers may be provided. In the illustrated embodiment, three rotation levers (first rotation lever 92, second rotation lever 93, and third rotation lever 94) are shown, but one rotation lock lever may be provided ( See FIG. 33 and Patent Document 1).

The configuration of the lock device is not limited as long as the lock device regulates the return wire by moving the lower seat plate 41 upward. For example, the locking device may not include a winding drum. That is, the winding drum may be provided at a location different from the locking device (for example, a portion of the seat plate that is separated from the locking device, an upper portion of the opening such as a lintel, or the inside of the guide rail). An aspect in which the winding drum is provided in the lintel portion is disclosed in Patent Document 1, for example. Further, the return wire is not necessarily limited to the one wound around the winding drum, and for example, the lower end side 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 locking device is not necessarily limited to the one provided with the lock drum, and for example, the drawing of the return wire may be mechanically restricted by the clamping means or the pressing means. The locking device is not necessarily limited to one in which all the components are provided on the upper seat plate, and includes a mode in which some of the components of the locking device are provided on the lower seat plate.

[G] Self-weight re-lowering delay mechanism As described above, after the obstacle is removed, the lower seat plate 41 moves downward relative to the upper seat plate 40, so that the lock device 9 is in an unlocked state. 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 is lowered again by 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 rotation lever 92) of the lock device 9 and the detection lever 42 from the second posture to the first posture, Timing of releasing the restriction of the return wires (the first wire W2 and the second wire W3) by reducing the speed of the movable lock portion in the second posture, which is the locked posture, and rotating the movable lock portion to the first posture. Delay. In other words, by delaying the timing at which the locking device 9 in the locked state is unlocked and allowing the return wires (first wire W2 and second wire W3) to be pulled out, the shutter curtain 1 is self-weighted after the obstacle is removed. The time until re-descent starts is delayed. A specific configuration example will be described below.

First, as shown in FIGS. 26 to 30, the lock device 9 includes a lock drum 90, a take-up drum 91, a first rotation lever 92, a second rotation lever 93, and a third rotation lever 94. It has. Regarding the details of the configuration and operation of the locking device 9, the above description can be used. Moreover, the description as stated above can be used for elements having the same reference numbers. The dead weight re-lowering delay mechanism in the present embodiment is a delay mechanism 46 that delays recovery of the first rotation lever 92.

As shown in FIGS. 41 to 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 fixed to the lower surface of the upper surface portion 400 of the upper seat plate 40 so as to hang from the upper surface portion 400 of the upper seat plate 40. A rotary damper 460 is fixed to the surface portion of the support plate 463.

The rotating arm 461 has a vertical posture extending substantially in the vertical direction. The base end (upper end) of the rotating arm 461 is connected to the rotary damper 460 and the distal end (lower end) is connected to one end of the connecting bar 462. It is connected to a nearby part. The connecting bar 462 extends in the length direction of the seat plate 4, and 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 time. It is connected to the lower end of the moving lever 92. The connecting bar 462 moves left and right in the length 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 rotation arm 461 is rotated in the first direction and the second direction in conjunction with the left and right movement of the connecting bar 462.

The rotary damper 460 is a one-way damper and freely allows the rotation of the rotation arm 461 in the first direction without giving resistance to the rotation of the rotation arm 461 in the first direction. By applying 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 at intervals in the length direction of the seat plate 4. As shown in FIGS. 43 to 44, the detection lever 42 is rotatably attached to a support portion 42 </ b> A fixed inside the upper surface portion 400 of the upper seat plate 40. In a normal posture, the seat plate 4 is in a state in which the lower seat plate 41 is suspended from the upper seat plate 40. Specifically, as shown in FIG. The contact piece 411 formed on the upper ends of the left and right side surface portions 413 of the lower seat plate 41 is hooked on the contact piece 402 formed on the lower end of the side surface portion 401, so that the It is suspended so that it can move up and down. 41, the width of the internal space of the seat plate 4 (the upper seat plate 40 and the lower seat plate 41) is much larger than the delay device 46, so that the upper seat plate 41 is moved when the lower seat plate 41 is moved upward. A space allowing the tilt of the lower seat plate 41 with respect to 40 in the front-rear direction is secured, and even if the floor surface is tilted, it is possible to cope with it well.

The detection lever 42 includes a contacted portion 420. In the normal posture shown in FIGS. 41 and 43, the contact piece 411 of the lower seat plate 41 approaches the contacted 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 relative to the upper seat plate 40, the contact piece 411 of the lower seat plate 41 contacts the contacted portion 420 from the lower side. As a result, the detection lever 42 rotates in a direction away from the lower end of the first rotation lever 92, and the wire 43 rotates the first rotation lever 92 in the first direction. Move to. In the posture in which 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 is in contact with the contact piece 402 of the upper seat plate 40 from below (see FIG. 44). ). It should be noted that when it comes into contact with an obstacle, it is set to stop its own weight drop and electric drop before the lower seat plate 41 moves up to the upper limit position.

The operation of the lock device 9, the detection lever 42, and the delay mechanism 46 will be described. In addition, please refer FIG. 26-30 for the effect | action of the locking device 9 suitably. When the lower end of the shutter curtain 1 that is falling under its own weight comes into contact with an obstacle and the lower seat plate 41 moves up 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 (in a normal posture) of the plurality of detection levers 42 are connected to each other by a wire 43, and one end of the wire 43 is connected to the first rotation lever 92 via a coil spring 98 and a delay mechanism 46. . When the lower seat plate 41 moves up relatively with respect to the upper seat plate 40, the detection lever 42 rotates in a direction away from the lock drum 90 and pulls the wire 43 in a direction away from the lock drum 90. The rotation 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 rotation arm 461 that accompanies the movement of the connecting bar 462. 1 rotation lever 92 rotates.

When the first rotation lever 92 rotates in the first direction from the first posture (FIG. 26), the first portion 920 of the first rotation lever 92 contacts the contact portion 935 of the second rotation lever 93. By pressing while in contact, the second turning lever 93 in the first position turns together with the first turning lever 92 in the first direction, and the locking portion 934 of the second turning lever 93 is moved. Is locked to the tooth-like locked 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 rotation lever 94 in the first posture is brought into contact with the contact portion 936 of the second rotation lever 93 in the first posture, so The rotation is restricted. The second rotating lever 93 in the first posture rotates in the first direction together with the first rotating lever 92, so that the contact portion 936 of the second rotating lever 93 is moved to the third rotating lever 94. At the same time as it gets over the corner portion of the locking portion 941 and locks to the locking portion 941, the third rotation lever 94 rotates downward under its own weight and assumes the second posture (FIG. 27).

When the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 are in the second posture, the second posture of the first rotation lever 92 is held by the pulling force of the wire 43. The second posture of the second turning lever 93 is maintained by the first portion 920 of the first turning lever 92 in the second posture coming into contact with the contact portion 935 of the second turning lever 93. The second posture of the third rotation lever 94 is held by the contact portion 923 of the first rotation lever 92 coming into contact with the contact portion 942 of the third rotation lever 94. Accordingly, when the wire 43 is pulled, that is, in the obstacle detection state, the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 maintain the second posture and are locked. The device 9 is in a locked state, and the rotation of the lock drum 90 is restricted.

When the rotation of the lock drum 90 is stopped, the withdrawal of the second wire W3 is restricted and the length of the second wire W3 becomes constant. In this state, the upper seat plate 40 (that is, the lock drum 90) is lowered with respect to the lower seat plate 41. Then, the first wire W2 is pulled through the second wire W3 and the relay device 8, and the first operating body 73 slides in the second direction. In the case of the electric descent, the first operating body 73 at the steady position moves in the second direction, the first micro switch SW1 is turned from ON to OFF, and the obstacle detection signal (seat plate operation signal) is detected as an obstacle. The driving of the switch M is stopped by the obstacle detection control panel 11A and the shutter control panel 11B which are transmitted to the control panel 11A and receive the obstacle detection signal, and the descent of the shutter curtain 1 is stopped. When the dead weight is being lowered, the first operating body 73 in the brake release position moves to the steady position (brake return position), the brake release lever ML returns, the brake returns, and the winding shaft 2 The descent of the shutter curtain 1 is stopped by restricting the rotation.

When the lower seat plate 41 moves down after the obstacle is removed and the wire 43 is not 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 turning. At this time, the one-way rotary damper 460 of the delay device 46 provides resistance to the rotation of the rotation arm 461 in the second direction, and the rotation arm 461 slowly rotates in the second direction. The connecting bar 462 that has been pulled by the wire 43 and moved in the first direction slowly moves in the second direction. Therefore, the rotation speed of the first rotation lever 92 connected to the end of the connection bar 462 in the second direction is reduced.

When the first rotation lever 92 rotates a predetermined amount, the contact portion 923 of the first rotation lever 92 abuts against the contact portion 942 of the third rotation lever 94 to act, and the third rotation lever The abutment portion 942 on the tip end side of 94 is pushed upward in conjunction with the turning of the first turning lever 92, and when the third turning lever 94 is pushed up by a predetermined amount, the third turning lever 94 is locked. The engagement state between the portion 941 and the contact portion 936 of the second rotation lever 93 is released (the second rotation lever 93 is kept locked until just before the engagement state is released), and the second 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 the locked state is released. FIG. 29 shows a state immediately before the lock state is released. When the contact portion 942 of the third rotation lever 94 is completely pushed up by the contact portion 923 of the first rotation lever 92 from the state of FIG. 29, the contact portion 936 of the second rotation lever 92 and the third turn The locking state of the moving lever 94 with the locking portion 941 is released, and at the same time, the second rotating lever 93 is instantaneously rotated in the second direction by the coil spring 97, so that the locking portion 934 becomes the lock drum 90. The lock drum 90 can be rotated by being disengaged from the locked portion 903 (FIG. 30).

In the present embodiment, the delay device 46 provided on the seat plate is used to delay the time until the lock device 9 is released from the locked state after the obstacle is removed. A mechanism for delaying the timing when the shutter curtain once stopped by the obstacle detection is lowered again is realized so that the (stop state) is immediately released. More specifically, in the present embodiment, the rotation lock lever includes two members (a first rotation lever 92 that rotates in conjunction with the upward movement of the lower seat plate, and a second rotation 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 turning lever 93 is configured to turn in the second direction when the first turning lever 92 is turned by a predetermined amount in the second direction so that the locked state is released. By slowly rotating the first rotation lever 92 in the second direction, the timing of releasing the locked state is delayed, and the time from the obstacle removal to the start of the shutter curtain re-lowering is delayed. Let

The specific configuration of the electric shutter with the mechanical hazard prevention device has been described in detail above with reference to the drawings, but these descriptions are merely examples of the electric shutter with the mechanical hazard prevention device, and the claims The configuration of the present invention described in the section is not limited.

1 Shutter curtain 6 Automatic closing device 10A First operation box (switch box)
10B Second operation box (operation box)
102 Second lid (lid)
103 Emergency closing switch (manual closing operation body)
104 Rotating lever (Brake return operation body)
106 Automatic closing device recovery lever (automatic closing device recovery operation body)
107 Pulley W5 Automatic closing device recovery wire

Claims (7)

A shutter curtain that descends by releasing the brake,
An automatic closing device that operates based on a fire detection signal to release the brake;
A manual closing device with a manual closing operation body for manually releasing the brake;
An automatic closing device restoration operation body for restoring the activated automatic closing device;
An operation box with a lid that can be locked and unlocked;
With
The manual closing operation body can be operated with the lid closed.
The automatic closing device restoration operation body is inoperable when the lid is closed, and can be operated with the lid open.
Fire shutter. The automatic closing device restoration operation body is accommodated in the internal space of the operation box,
The fire shutter according to claim 1. The automatic closing device recovery mechanism and the automatic closing recovery operation body are connected by an automatic closing device recovery wire,
In the inner space of the operation box, there is provided a pulley for turning and guiding the automatic closing device recovery wire,
In a state where the lid is unlocked and opened, the automatic closing device is restored by pulling the automatic closing device recovery operation body via the pulley.
The fire shutter according to claim 2. The manual closing device includes a brake return operation body for returning a brake released by the manual closing operation body, and the brake return operation body can be operated in a state where the lid body is closed.
The fire shutter according to any one of claims 1 to 3. The manual closing operation body can be operated by pressing a predetermined portion on the lid body in the closed state,
The brake return operation body is provided adjacent to the lid body, and can be operated by operating the manual closing operation body.
The fire shutter according to claim 4. The brake is a brake of an opening / closing machine that electrically lifts and lowers the shutter curtain to open and close the opening,
A switch box provided with an open / close operation switch is disposed adjacent to the operation box.
The fire shutter according to any one of claims 1 to 5. The brake is a brake of an opening / closing machine that electrically lifts and lowers the shutter curtain to open and close the opening,
The operation box is a switch box provided with an open / close operation switch.
The fire shutter according to claim 1.

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