JP6662618B2 - Automatic closing device with shutter and recovery device - Google Patents

Description

The present invention relates to an automatic closing device provided with a recovery device, and more particularly, to an automatic closing device in a mechanical harm prevention device that lowers a shutter curtain by its own weight by releasing a brake in the event of a fire and mechanically stops the shutter curtain that descends by its own weight. Related to the recovery mechanism.

In the event of a fire, the fire-prevention shutter activates an automatic closing device in response to a signal from the disaster prevention panel to release the brake, and the shutter curtain descends under its own weight to close the opening of the building. In addition, the fireproof shutter can release the brake by the operation of the manual closing device without using the fire detection signal, and can be lowered by its own weight. The fireproof shutter is provided with a so-called harm prevention device in order to prevent an evacuee from being pinched by a shutter curtain that falls by its own weight.

The mechanical harm prevention device that mechanically stops the shutter curtain that falls by its own weight moves the brake release lever of the switchgear by the automatic closing device that receives a signal from the disaster prevention panel that received a fire signal from the detector when a fire occurred. Release the brake to lower the weight of the shutter curtain, and when the seat plate at the lower end of the shutter curtain detects a person or an obstacle during the weight drop, the brake release lever and brake of the switchgear are returned and the shutter is temporarily stopped. When the obstacle is removed after the shutter is temporarily stopped, the shutter curtain descends again by its own weight and closes the opening (Patent Document 1).

The automatic closing device has a movable element that can move between a standby position and an operating position. In the event of a fire, the movable element moves from the standby position to the operating position to release the brake accompanying the movement of the movable element. The brake of the switch is released by moving the lever. Therefore, when the shutter curtain descends under 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 thereafter.

Restoration of the automatic closing device in the conventional fire shutter was performed by opening a ceiling inspection opening and directly pulling a short wire connected to a movable element of the automatic closing device. However, since the resistance when moving the movable element in the operating position to the standby position (for example, depending on the structure of the automatic closing device, it is necessary to compress a strong tension coil spring), the operation force is heavy, and thus the work is difficult. When the wire is forcibly pulled, the wire and the like (in some cases, the element of the automatic closing device) may be damaged.

In addition, a fireproof shutter includes a management combined shutter in which the shutter is normally opened and closed by driving a switchgear at the time of normal operation, and is automatically lowered by an automatic closing device in a fire. In such a management combined shutter, since an operation box having an open / close operation switch is provided, instead of opening the ceiling inspection opening, various manual operations are also performed in the same place as the opening / closing operation. There is also a request to do so. In this case, if the wire for restoration is extended from above the opening to the operation box, the resistance is further increased, and the operation force for restoration may be further increased.
JP 2009-13647

  SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic closing device provided with a restoring device capable of reducing an operation force for restoring the automatic closing device.

The technical means adopted by the present invention are:
An automatic closing device with a recovery device,
The automatic closing device is movable between a first position in a standby state and a second position in an operating state, and releases the brake by moving from the first position to the second position. With movable elements,
The recovery device,
A movable mechanism,
An automatic closing device restoring operation body,
An automatic closing device restoration wire connecting the movable mechanism and the automatic closing device restoration operation body,
A booster mechanism for operating force by the automatic closing device recovery wire,
With
The movable mechanism allows the movable element to move from a first position to a second position, and when the automatic closing device restoration wire is pulled by the automatic closing device restoration operation body, the booster mechanism. Thereby, the movable element in the second position is forcibly moved to the first position.
Self-closing device.

In one aspect, the movable mechanism comprises:
A first movable body coupled to the movable element and integrally movable with the movable element between a first position in a standby state and a second position in an active state;
A second movable body to which one end of the automatic closing device restoration wire is connected, and which is movable between a first posture and a second posture;
Linking means for applying a moving force of the second movable body to the first movable body;
With
The cooperation means allows the second movable body to move from the first position to the second position of the movable element and the first movable body while maintaining the first posture, and When the automatic closing device restoring operation body pulls the automatic closing device restoring wire to move from the first position to the second position, the booster mechanism causes the first movable body and the first movable member in the second position to be moved. The movable element is configured to be forcibly moved to the first position.
In one aspect, the first movable body may be constituted by a part of the movable element of the automatic closing device.
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 closing device restoration wire is greater than the distance from the rotation fulcrum to the point at which the turning 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 in the second movable body and inserted through the guide opening;
When the first movable body is at the first position, the guide shaft is at the first position within the guide opening, and when the first movable body is at the second position, the guide shaft is within 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 relatively moves from the first position to the second position within 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 a force is transmitted to the first movable body.

In one aspect, the second movable body is urged by an urging means in a direction of moving from the second posture to the first posture,
When the pulling force of the automatic closing device restoring wire is released, the second movable body returns from the second posture to the first posture.
In this device, the restoration mechanism can automatically return to the original state after the restoration of the automatic closing device, and after the automatic closing device is restored by pulling the automatic closing device restoration wire, without special operation , The automatic closing device and the return mechanism are in a standby state.

In one aspect, the automatic closing device restoring operation body is stored in an operation box.
Typically, the operation box is provided at a height at which the skeleton (wall body, etc.) can be easily operated. Therefore, it is possible to perform a recovery operation of the automatic closing device without opening the ceiling inspection port as in the related art. Become.

In one aspect, the self-closing device releases the brake via an operating part that is separated from the self-closing device.
In one aspect, the automatic closing device is applied to a so-called management combined shutter, and more specifically,
A switchgear that opens and closes the opening by electrically moving the shutter curtain up and down,
An actuating unit including a first actuating body movable in a first direction and a second direction, and moved in the first direction to be a brake release position;
Provided at the lower end of the shutter curtain, an upper seat plate, and a seat plate including a lower seat plate that can move upward relative to the upper seat plate,
A return cord-shaped member that is connected to the operating portion and is configured to be pulled out with a shutter curtain descent,
A lock device that mechanically regulates the drawer of the return cord-shaped member by the lower seat plate of the lower shutter curtain hitting an obstacle and moving upward relative to the upper seat plate,
With
The first operating body moves to the brake release position by moving in the first direction from the steady position, and moves the brake release lever in the brake release direction to mechanically release the brake of the switchgear. By moving the brake release lever in the brake return direction by moving the brake release lever in the brake return direction from the position, the brake of the switch is mechanically returned, and is also configured to be movable in the second direction from the steady position. Yes,
The operating unit includes a first detection unit that detects that the first operating body has moved from a steady position in a second direction, and outputs an obstacle detection signal to a control unit.
When the lower seat plate of the shutter curtain during the electric descent hits an obstacle, the first actuating body in the steady position is pulled by the pulling of the return cord-shaped member, the pull-out of which is regulated, in accordance with the shutter curtain descent. In the direction of, the control unit that has received the obstacle detection signal from the first detection means stops the electric descent of the shutter curtain,
If the lower seat plate of the shutter curtain under its own weight falls against an obstacle, the first actuating body at the brake release position is pulled by the return cord-shaped member, the drawer of which is restricted, being pulled by the shutter curtain descending. 2 to move the brakes of the switchgear mechanically to stop the shutter curtain from falling by its own weight.
Used for electric shutter with mechanical harm prevention device.
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 in the second direction from the steady position (obstacle). Detection position) ".
“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 at 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 its own weight descent.
The first operating body is moved in the first direction when the automatic closing device is activated in 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 it 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 by the manual closing operation to the second operating body and the second operating body. It moves in the first direction integrally with the third operating body.
In one aspect, the first operating body moves in a first direction from a steady position, hits a brake release lever of a switch and presses the brake release lever to release a brake,
The return cord member is connected to the first operating body.

In one aspect, the operating unit is provided with a second detection unit that detects that the operating unit has been in the brake release posture and outputs an operation confirmation signal to the control unit.
When the operation confirmation signal is input to the control unit, the control mode changes from the electric open / close mode to the self-weight drop mode.
In one aspect, the actuating section comprises a second actuating body movable in a first direction and a second direction and connected to an automatic closing device,
The second operating body is configured to move in a first direction by moving the first operating body at a steady position in a first direction by moving in a first direction by operation of an automatic closing device,
The second detection means detects movement of the second operating body in a first direction.
In one aspect, the actuating section comprises a third actuating body 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 operating the manual closing device, thereby moving the first operating body at the steady position in the first direction via the second operating body. And
The second detection means detects movement of the second operating body in the first direction accompanying 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 any 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, and Push button operation for this purpose can be invalidated, and the shutter curtain during electric opening and closing can be stopped.

According to the present invention, the operating force of the recovery operation of the automatic closing device can be reduced using the booster mechanism without affecting the operation of the automatic closing device.
Since the operating force at the time of restoration is reduced, breakage of elements, wires, and the like of the automatic closing device is unlikely to occur.

It is a schematic front view of the electric shutter device provided with the harm prevention device. In the figure, solid lines connecting the elements are electric wires, and dashed lines are wires. It is the whole front view which omitted the ceiling of the electric shutter device (opening state full closure state) provided with the harm prevention device. FIG. 3 is a partially enlarged view of FIG. 2 (on a side where a switch is installed). It is the elements on larger scale of FIG. FIG. 3 is a longitudinal sectional view of FIG. 2. It is the elements on larger scale of FIG. FIG. 7 is a view similar to FIG. 6 in a fully opened state. FIG. 5 is a partial longitudinal sectional view of FIG. 4. It is a figure showing an automatic closing device (at the time of monitoring). It is a figure which shows an automatic closing apparatus (at the time of a brake release by a fire detection signal / own weight fall). It is a figure showing an operation part (each element is in a steady position). It is a figure showing an operation part (electric opening and closing mode). It is a figure showing an operation part (at the time of an obstacle detection in electric opening and closing mode). It is a figure showing an operation part (at the time of self-weight descent by operation of an automatic closing device). It is a figure showing an operation part (at the time of obstacle detection in automatic closure device operation). It is a figure showing an operation part (at the time of self-weight descent by operation of a manual closing device). It is a figure showing an operation part (at the time of obstacle detection by a manual closing device operation). It is a component diagram which shows the 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 showing the 2nd operation body of an operation part. It is a component diagram which shows the 3rd operation body of an operation part. 1 shows a recovery mechanism integrated type according to the present embodiment. 2 shows details of a recovery mechanism according to the present embodiment. It is a longitudinal section of the base part of the 2nd lever of a recovery mechanism. It is a figure explaining operation of a recovery mechanism integrated type automatic closure device concerning this embodiment. It is a figure showing a lock device (at the time of usual). It is a partial enlarged view showing a lock device (locked state). It is a figure which shows a lock device (at the time of a seat plate obstacle removal), and a shutter curtain is stopping. FIG. 29 is a diagram illustrating a lock device in which each lever slightly rotates in the second direction from the state of FIG. 28 (when removing a seat plate obstacle), and a shutter curtain is stopped. It is a figure showing a lock device (at the time of a shutter curtain re-fall). It is a figure showing a relay device. It is a figure which shows operation | movement of the relay part at the time of an electric descent, (A) Steady position (at the time of an electric descent), (B) Obstacle detection at the time of an electric descent, (C) After obstruction removal (electric descent). . It is a figure which shows operation | movement of the relay part at the time of self-weight descent, (A) steady-state (at the time of stop before self-weight descent), (B) self-weight descent (operation of an automatic closing device, operation of a manual closing device), (C) ) Obstacle detection during self-weight descent (same as steady position), (D) After obstacle removal (self-weight descent). It is the top view and front view of an operation box. (A) is an AA sectional view of the operation box shown in FIG. 34, and (B) is a BB sectional view of the operation box shown in FIG. 34. FIG. 36 is a diagram illustrating a state where the lid is opened and the automatic closing device recovery lever is pulled out from the state of FIG. 35 (A). It is a figure which shows the operation | movement chart in a motor-operated opening / closing mode of a shutter, (1) shows at the time of rising, (2) at the time of falling, (3) shows the time of obstacle detection. It is a figure which shows the operation | movement chart of a shutter, (1) When brake release is performed at the time of an electric rise, (2) When brake release is performed at the time of an electric fall, (3) It is an obstacle during self-weight descent. Indicates when detection has been performed. It is a figure showing a delay mechanism. FIG. 40 is a partially enlarged view of FIG. 39. FIG. 40 is a longitudinal sectional view of FIG. 39. It is a figure which shows a delay mechanism, an upper figure is a front view and a lower figure is a bottom view. It is a figure which shows the seat plate and a 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 plate and detection lever in an obstacle detection attitude | position (upward movement attitude | position of a lower seat plate), The left figure is a longitudinal cross-sectional view, and 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 has a shutter curtain 1 that closes an opening and a shutter curtain 1 that is positioned above the opening. It has a winding shaft 2 to be mounted, and guide rails 3 erected on both left and right ends of the opening. The shutter curtain 1 is configured by vertically connecting a plurality of long slats extending in the opening width direction, and a seat plate 4 is provided at a lower end. The winding shaft 2 is rotatably supported between left and right brackets 13 provided in a take-out shape from the frame 12. As shown in FIGS. 1 and 2, a switch M is provided above the opening at a position closer to one side in the opening width direction. The switch 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 fire protection case is accommodated in the ceiling 14, but the shutter is accommodated in a rectangular shutter box (not shown) attached to the frame. You may do so. Normally, the shutter curtain 1 is electrically driven up and down by driving the take-up shaft 2 to rotate forward and reverse by the opening and closing machine M to open and close the opening. As shown in FIGS. 2, 7, 8, etc., the seat plate 4 is an elongated upper seat plate 40 extending in the width direction of the opening, and a lower side of the upper seat plate 40 is vertically moved relative to the upper seat plate 40. It consists of a long lower seating plate 41 movably suspended, and as will be described later, the seating plate 4 detects an obstacle when the shutter curtain 1 that descends electrically or falls by its own weight hits the obstacle. It is one 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 operating 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 is operated to pull the wire W1, so that the operating unit 7 is in the brake release position, and the brake of the switch M is released. Regardless of whether it is a motorized descent or a gravity descent, the descent of the shutter curtain 1 when the closed shutter curtain 1 hits an obstacle is stopped via the operating unit 7 (in the case of the motorized descent). Is performed, the micro switch SW1 is actuated, and in the case of own weight drop, the mechanical release of the brake release lever ML is performed. In the present embodiment, the recovery mechanism 5 is integrated with the automatic closing device 6. Specific configurations of the automatic closing device 6, the operating unit 7, and the recovery mechanism 5 will be described later in detail.

The shutter device includes a control unit, and performs different control in an electric opening / closing mode (normal mode) and a self-weight drop mode (fire mode), as described later. 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 the present embodiment, the operating unit 7 and the obstacle detection control panel 11A are electrically connected, and the obstacle detection control panel 11A and the shutter control panel 11B are electrically connected. The 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 motorized 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 from each other, but the control unit has the function of the obstacle detection control panel 11A and the function of the shutter control panel 11B. One control unit may be used. The control unit will be described later in detail. As shown in FIG. 1, the sensor 6A and the disaster prevention board 6B, and the disaster prevention board 6B and the automatic closing device 6 are electrically connected to each other. Note that the present invention can also be applied to a manual shutter device, in which case the first operation box 10A becomes unnecessary.

When the opening is fully opened (when retracted), the shutter curtain 1 is wound around the winding shaft 2 in a state where the lowering is regulated by a brake which is a component of the switch M. When a fire occurs in this state, the fire is detected by the fire detector 6A, the automatic closing device 6 is activated by a fire detection signal from the disaster prevention board 6B, and the operating unit 7 is brought into the brake release position 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 releases the brake of the switch M. When the brake is released, the shutter curtain 1 descends under its own weight while being guided by the groove of the guide rail 3 at both ends in the width direction, and the opening is completely closed by the seat plate 4 landing on the floor. At this time, the shutter curtain 1 descends at a speed controlled by the operation of a governor (governor) built in the switch M.

The brake release lever ML protrudes from the brake case of the switch M (see FIG. 7), and the brake release lever ML is moved by the brake release member (the first operating member 73 in the present embodiment), whereby the switches M and The brake regulating 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 embodiment, the brake means includes a switch plate output shaft or a brake plate that is opposed to a rotating member that rotates integrally with the output shaft so as to be able to contact and separate therefrom. The brake plate is pressed by the urging means, and the rotation of the winding shaft is restricted by the operation of the brake. By swinging the brake release lever against the spring, the brake plate is separated and the brake is released, so that the winding shaft can rotate and the shutter curtain falls by its own weight. When the brake release lever is released, the brake plate is pressed by the spring serving as the urging means, and the brake and the brake release lever automatically return. That is, the brake of the switch 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 provided with a so-called harm prevention device, and when the seat plate 4 at the lower end of the shutter curtain 1 under its own weight hits an obstacle and detects the obstacle, the shutter of the switch M is returned via a return wire. Thus, the descent of the shutter curtain 1 is stopped. The return wire includes a first wire W2 and a second wire W3. A relay device 8 is provided in the upper part of the opening toward the side where the switch M in the opening width direction is installed. A lock device 9 is provided on one side. The lock device 9 includes a lock drum 90 located substantially directly below the relay device 8, a winding drum 91 adjacent to the lock drum 90, and a lock mechanism that locks the rotation of the lock drum 90 when an obstacle is detected. I have. 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 inside the outer wire W2 '. One end of the second wire W3 is connected to the relay device 8, and the other end is wound around the lock drum 90 of the lock device 9 provided on the seat plate 4 and passes through the lock drum 90 to take up the winding drum 91. It is connected so that it can be wound. The second wire W3 is drawn out so as to extend along the surface of the shutter curtain 1 as the shutter curtain 1 descends. The lock device 9 is provided on the upper seat plate 40, and the lower seat plate 41 of the shutter curtain 1 being descended hits an obstacle and moves upward relative to the upper seat plate 40, so that the return wire (second wire W3 ) Is mechanically restricted, 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) whose drawer is restricted. . In this manner, 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 (the first operating body 73) is returned by the return wire (the second wire W3 + the first wire W2). To the brake return position to stop the shutter curtain 1 from falling by its own weight.

When the obstacle is removed, the return wire can be pulled out, the brake release body (first operating body 73) moves in the brake release direction, and the shutter curtain 1 descends again under its own weight. After the obstacle is removed, the timing at which the shutter curtain 1 re-falls under its own weight is delayed. As described later, even when the seat plate 4 at the lower end of the shutter curtain 1 hits an obstacle during the electric descent, the brake release body (the first operating body 73) using the return wire (the second wire W3 + the first wire W2). ) 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 rotatably provided between an upper seat plate 40 and a lower seat plate 41 constituting the seat plate 4. The configuration of the obstacle detecting means will be described later in detail. In the illustrated embodiment, the lock device 9 is attached to the upper seat plate 40 at a position close to one side of the length of the seat plate 4 in the length direction, specifically, the side where the switch M in the opening width direction is provided. A rotatable lock drum 90, a rotatable winding drum 91, a first pivot lever 92, a second pivot lever 93, a third pivot lever 94, and a case 95 containing these components, The configuration of the lock device 9 will be described later in detail. Further, the configuration of the delay means of the self-weight descent after removing the obstacle will be described later in detail.

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 rectangular shape in cross section, and is attached between lower ends of 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 and directly above the lock device 9 in front view, and is disposed so as to correspond to the wire W3 extending vertically. I have. As shown in FIG. 6, the relay device 8 is located on the side opposite to the frame 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 (in the indoor and outdoor directions), and a mounting base 81 that is mounted on the receiving member 16. The mounting base 81 includes left and right support pieces 810 to which the rotating body 80 is rotatably mounted, and mounting pieces 811 to be mounted on the receiving member 16. The rotating body 80 rotates about a rotation fulcrum 82 such that a first end and a second end in the front-rear direction move up and down, respectively. A fixed portion 83 at the end of the first wire W2 is formed at the first end, and a fixed 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 for fixing the end of the first wire W2 exposed from the outer wire W2 'while leaving an extra end, and a second fixing portion 831 for fixing the extra end. , The first fixing portion 830 and the second fixing portion 831 firmly fix the end of the first wire W2. Below the fixing portion 83, a fixing portion 832 at the end of the outer wire W2 'is provided. The fixing portion 832 is attached to a portion below the left and right support pieces 810 of the mounting base 81. The first wire W2 and the outer wire W2 ′ are guided in a direction away from the shutter core C through a guide 160 attached to the receiving member 16, and are connected to the operating mechanism (first operating body 73) of the operating section 7. ing. The fixing portion 84 sandwiches the end of the second wire W3, and a locking portion 840 having a diameter larger than the wire diameter is formed at the end of the second wire W3. 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 about the rotation fulcrum 82, and the second end lowers downward. The first end is moved 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 of the support pieces 810 and the rotating body 80 at a predetermined position. The temporary fixing screw 85 is for temporarily fixing the rotating body 80 at a predetermined angle (appropriate angle at the time of wire attachment) with respect to the mounting base 81 to regulate the rotation. By fixing the first wire W2 and the second wire W3 to the rotating body 80 when in the posture, there is no need to adjust the posture of the rotating body 80 when attaching the wire to the relay device 8. The temporary fixing screw 85 is removed after fixing the wire.

As shown in FIGS. 1 to 3, an operation box 10 is provided on a wall near the shutter device at an easily operable height. The operation box 10 includes a first operation box 10A on the right side, which is a vertically long rectangular parallelepiped box, and a second operation box 10B on the left side, which is a vertically long rectangular parallelepiped box. 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 with a vertical partition plate 10C, but two independent operation boxes are provided. A box may be adjacent to the box. A first lid 101 is provided on the front surface of the first operation box 10A so as to be openable and closable, and a second lid 102 is provided on the front surface of the second operation box 10B so as to be openable and closable. The first operation box 10A includes 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. Key hole 1010 for The second operation box 10B is provided with 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. Has a keyhole 1020 for it.

The first operation box 10A is a switch box, and an open / close operation switch 100 (each switch is not shown) including an open switch U, a close switch D, and a stop switch S is arranged in the first operation box 10A. I have. The opening / closing operation switch 100 is electrically connected to a control unit (an obstacle detection control panel 11A, a shutter control panel 11B), and when the opening switch U is pressed, the shutter curtain is operated by the switch M via the control unit. When the shutter switch 1 is raised and the close switch D is pressed, the shutter curtain 1 is lowered by the switch M via the control unit. When the stop switch S is pressed, the drive of the switch M is stopped via the control unit and the shutter is stopped. The 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 below the second lid 102, and is located on the front side of the second operation box 10B. A pivot lever 104 is rotatably provided adjacent to the second lid 102 at one side. In the second operation box 10B, a wire end fixing portion 105 for fixing an end (the other end) of the wire W4 for manual operation with a screw is provided, and an automatic closing device recovery lever 106 is accommodated. The pressing operation of the emergency closing switch 103 and the manual turning operation of the turning lever 104 can be performed with the second lid 102 of the second operation box 10B closed, while the automatic closing device restoring lever is used. The recovery operation of the automatic closing device 6 using the 106 needs to be performed by unlocking the second key means and opening the second lid 102.

The operation unit (the emergency closing switch 103 and the rotating lever 104) of the manual closing device is mechanically connected to one end of a wire W4 for manual operation so that a brake releasing operation and a brake returning operation of the operating unit 7 can be performed. I have. The other end of the wire W4 is connected to the operating section 7. An opening is formed in the second lid 102 of the second operation box 10B in correspondence with the emergency closing switch 103, and the opening is closed by a cover. The time closing switch 103 is depressed to operate. The wire W4 extends inside the outer wire W4 '. The operation unit of the manual closing device is operated to release the brake by a first operation (a pressing operation of the emergency closing switch 103) from a state before the brake releasing operation, and to a second operation from a state after the brake releasing operation. (Rotary lever 104) operates to return the brake. Here, a force is applied to the wire W4 to pull the wire end fixing portion 104 upward (in FIG. 35 (B)) by the second coil spring 77 (described later) of the operating portion 7; The locking mechanism prevents the wire end fixing portion 105 from moving upward to lock the wire W4. When the emergency closing switch 103 is pressed, the lock is released, the wire end fixing portion 105 moves up by a predetermined distance, the wire W4 in a tension state is loosened, and the rotating lever 104 is moved forward with respect to the surface of the cover body 101. Incline (brake release position). When the inclined rotating lever 104 is pivoted downward (shown by an arrow in FIG. 35B), the wire end fixing portion 105 is pulled down to the above-described lock position, and the wire W4 is pulled by a predetermined distance. The movement of the wire W4 is restricted by the lock mechanism in a state where tension is applied to the wire W4 (brake return posture). Thereafter, the rotating lever 104 is rotated upward to be housed in the second operation box 10B, and is set. As described above, the lowering and stopping of the shutter curtain by its own weight by the operation unit of the manual closing device can be performed without opening the second lid 102 of the second operation box 10B. The recovery lever 106 forms a recovery device of the automatic closing device 6 together with the recovery mechanism 5. The description of the recovery lever 106 will be described later in connection with the recovery mechanism 5 of the automatic closing device 6.

As shown in FIG. 6, the receiving member 16 of the lintel portion 15 above the opening is provided with a smoother element 17 on the side opposite to the frame 12 with respect to the shutter core C. The contact or interference with the lintel portion 15, the relay device 8, and the like 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. Note that the smoother element 17 may be a single roller. The number of the smoother elements 17 is appropriately selected, for example, from 1 to 5 according to the opening width dimension. An emergency switch 18 is provided on the upper side 150 of the lintel portion 15, and in the case of a shutter device that is normally opened and closed electrically in the event that the shutter curtain 1 does not stop at the upper limit due to a failure of the limit switch LS or the like. When the emergency switch 18 as an upper limit overrun detector is operated, the shutter M is stopped from rising by the switch M. As shown in FIG. 7, the emergency switch 18 includes a first abutting piece 180 protruding into the movement path of the shutter curtain 1 (the seat plate 4 comes into contact when the shutter curtain 1 rises beyond the upper limit position). The second contact piece 181 that rises vertically and extends substantially horizontally further rearward (the shutter curtain 1 continues due to a state where the shutter curtain 1 being descended hits an obstacle, a failure of an obstacle detection unit, or the like). If the shutter curtain 1 is fed out, the diameter of the shutter curtain 1 wound on the winding shaft 2 becomes large, and the shutter curtain 1 hangs down and comes into contact with the shutter curtain 1).

[B] Automatic closing device The automatic closing device 6 is activated by the input of a fire detection signal from the disaster prevention board 6B, and moves the brake release lever ML via the wire W1 and the operating portion 7 to release the brake. An embodiment of the automatic closing device 6 will be described with reference to FIGS. Note that the automatic closing device 6 illustrated in FIGS. 9 and 10 is only one embodiment, and the present invention is not limited by the configuration of the illustrated automatic closing device 6. 9 and 10 are for describing the components and operation of the automatic closing device 6. In the present embodiment, as shown in FIGS. Are integrated. 9 and 10, the automatic closing device restoring wire W5 is connected to the tip of the operating rod 60. However, in this embodiment, it is noted that the automatic closing device restoring wire W5 is connected to the restoring mechanism 5. I want to.

[B-1] Components and Operation of Automatic Closing Device The automatic closing device 6 includes an operating rod 60 supported reciprocally in a first direction and a second direction, and an operating rod 60 in the first direction. A coil spring 61 that is energized, a solenoid 62 that is energized by the input of a fire detection signal, and a 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 by the coil spring 64 toward the first posture.

The automatic closing device 6 has a frame 65 including a U-shaped support portion having a horizontal piece 650 and opposed vertical pieces 651 and 652, and the operating rod 60 has vertical pieces 651 and 652. It is supported so that it can be inserted and reciprocated. 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 contacts the vertical piece 651 and the other end thereof. 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, there are provided two micro switches MS arranged side by side and a rotary operation piece 66 for operating the micro switches MS. The rotation operation piece 66 is biased to the side that turns the microswitch MS from OFF to ON. When the microswitch MS changes from the ON state to the OFF state, the fire detection signal applied to the solenoid 62 is cut off, and the emergency closing panel 6B is notified that the automatic closing device 6 has released the brake.

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

As shown in FIG. 9, when the turning operation piece 66 comes into contact with the contact piece 610, the turning is regulated, and the microswitch MS is in the ON state. As shown in FIG. 10, once the automatic closing device 6 is operated, the coil spring 61 is extended, the contact piece 610 is separated from the rotary operating piece 66 and abuts on the vertical piece 652, and the rotary operating piece 66 is As a result, the micro switch MS is turned off, and the power supply to the solenoid 62 is cut off. The latch 63 is moved to the first posture side by the coil spring 64, and the axial locking portion 630 is in contact with the upper edge 601 of the operating rod 60 (see FIG. 10).

[B-2] Recovery mechanism of automatic closing device The recovery mechanism 5 of the automatic closing device 6 will be described with reference to FIGS. FIG. 22 shows the automatic closing device 6 to which the recovery mechanism 5 is connected, and FIG. 23 shows the recovery mechanism 5. About the specific element and operation | movement of the automatic closing apparatus 6, the above description based on FIG. 9, FIG. 10 can be suitably used. As shown in FIG. 22, the recovery mechanism 5 is provided adjacent to the automatic closing device 6, and is a so-called recovery mechanism integrated type automatic closing device. The base 67 of the automatic closing device 6 and the base 55 of the restoring mechanism 5 are integrated with a screw by overlapping the L-shaped rising pieces in side view, and are also integrated with the operating rod 60 of the automatic closing device 6 and the restoring mechanism 5. Are connected and integrated. Although the automatic closing device 6 and the recovery mechanism 5 may be separated from each other, it is desirable to arrange the recovery mechanism 5 adjacent to the automatic closing device 6 from the viewpoint of interlocking movement and saving space.

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 in a standby state and a second position in an operating state integrally with the operating rod 60. is there. A brake release wire W1 is connected to the operating rod 60. Note that the brake release wire W1 may be connected to the first lever 50, or the first lever 50 and the operating rod 60 may be formed from one member. The second lever 51 is movable (rotated in the present embodiment) between the first posture and the second posture, and is connected with the automatic closing device recovery wire W5. When the first lever 50 moves from the first position to the second position, the second lever 51 maintains the first posture while allowing the movement without hindering the movement, and the first lever 50 By moving the second lever 51 from the first position to the second position after moving to the position 2, 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 be forcibly moved to. A stand 56 is provided at the end of the base 55 of the recovery mechanism 5 on the side away from the automatic closing device 6 in an upright state. Are respectively fixed at the ends of the outer wires W5 '. 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 (operated state) integrally with the operating rod 60. It is movable. A brake release wire W1 is connected to the operation rod 60, and the brake release wire W1 is movable as the operation rod 60 and the first lever 50 of the automatic closing device 6 move. The moving direction of the operating rod 60 and the first lever 50 of the automatic closing device 6 coincides with the length direction of the portion of the brake release wire W1 extending from the connection portion with the operating rod 60, and the automatic closing device 6 is activated. Then, when the operating rod 60 and the first lever 50 of the automatic closing device 6 at 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-shaped part 500 extending along a horizontal plane and a second plate-shaped part 501 extending along a vertical plane, and the second plate-shaped part 501 has a protruding piece 502 extending downward. Are formed integrally, and a guide opening 503 having a horizontal rectangular shape is formed on the side of the second plate-shaped portion 501 that is separated from the first plate-shaped portion 500. The directions of the surfaces of the first plate-shaped portion 500 and the second plate-shaped portion 501 are not limited to the illustrated modes. The first plate portion 500 of the first lever 50 is connected to the operating rod 60 of the automatic closing device 6, and the operating rod 60 is connected to the brake release wire W1. The guide opening 503 is a horizontally long hole extending in the moving direction of the first lever 50, and includes a first edge 5030 on the automatic closing device 6 side and a second edge 5031 on a side separated from the automatic closing device 6. (See FIG. 24). The protruding piece 502 includes a first edge 5020 on the automatic closing device 6 side and a second edge 5021 on the side separated from the automatic closing device 6 (see FIG. 24).

The second lever 51 is a rotation lever that can rotate around a rotation support shaft 53 on the base end side (lower end side in the illustrated embodiment), and has a distal end connected to an automatic closing device recovery wire W5. I have. In the illustrated embodiment, a vertical piece 530 supporting the pivot 53 is formed upright relative to the base 55. The second lever 51 is rotatable between a first inclined position in which the distal end is inclined toward the automatic closing device 6 and a second inclined position in which the distal end is inclined toward the side separated from the automatic closing device 6. Has become. The second lever 51 is urged by a spring 52 as an urging means so as to maintain the first inclined posture. Therefore, normally, the spring 52 is in the first inclined position by the force of the spring 52, and the automatic closing device recovery wire W5 is pulled against the spring force, thereby turning from the first inclined position to the second inclined position. Then, when the pulling force of the automatic closing device restoring wire W5 is released, the spring 52 automatically returns to the first inclined posture by the urging force of the spring 52.

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

FIG. 24 shows the details of the spring 52 that is the urging means. The two legs 522 are hung on the guide shaft 54, and the second lever 51 is urged by the spring 52 so as to maintain the first inclined posture. By pulling the wire W5 for restoring the automatic closing device, when the second lever 51 rotates from the first inclined posture to the second inclined posture, a force for returning to the original posture is accumulated in the spring 52. When the pulling force of the automatic closing device restoring wire W5 is released, the second lever 51 is automatically rotated and returned to the first inclined posture by the accumulated force of the spring 52.

As shown in FIG. 36, the other end of the automatic closing device restoring wire W5 whose one end is fixed to the tip of the second lever 51 extends into the second operation box 10B, and extends into the second operation box 10B. It is guided horizontally through a pulley 107 provided, and a T-shaped pull as an automatic closing device recovery lever 106 is provided at the end. The automatic closing device restoring wire W5 extends inside the outer wire W5 'except for both end portions, and is appropriately wrapped around a guide member (not shown) such as a pulley as necessary, and is wrapped around the second operation box 10B. You will be guided to To restore the activated automatic closing device 6, the second key means of the second operation box 10B is unlocked, the second lid 102 is opened, and the automatic operation device stored in the second operation box 10B is opened. By pulling out the end of the automatic closing device restoring wire W5 with the closing device restoring lever 106 and pulling it through the pulley 107, the second lever 51 in the first position is rotated to the second position. When the automatic closing device 6 is operated and the first lever 50 is in the second position, the guide shaft 54 comes into contact with or close to the second edge portion 5031 of the guide opening 503 on the side of the guide opening 503 that is separated from the automatic closing device 6. When the second lever 51 rotates from the first posture to the second posture, the position of the guide shaft 54 with respect to the rotation support shaft 53 moves, so that the movement of the guide shaft 54 causes the first lever 50 to move to the second position. Move to position 1.

The operation of the automatic closing device 6 including the recovery mechanism 5 will be described with reference to FIG. Regarding the state of the automatic closing device 6, the upper diagram in FIG. 25 corresponds to FIG. 9, the middle diagram in FIG. 25 corresponds to FIG. 10, and the descriptions related to FIG. 9 and FIG. Can be. 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 at a first position on a side away from the automatic closing device 6, the second lever 51 is in a first posture inclined toward the automatic closing device 6, and the second lever The guide shaft 54 provided on the 51 is located at 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 portion 5020 of the protruding piece 502 of the first lever 50 is separated from the contact portion 57 formed upright from the base 55, and the second edge portion 5021 is separated from and close to the rotation support shaft 53. (See FIG. 24).

When the automatic closing device 6 operates in the standby state, the operating lever 60 of the automatic closing device 6 moves to the side separated from the return mechanism 5, and the first lever 50 connected to the operating lever 60 moves toward the automatic closing device 6 side. The wire W1 connected to the operating rod 60 fixed to the first lever 50 is pulled toward the automatic closing device 6, and the operating portion 7 assumes the brake release position, and the brake is released. When the first lever 50 moves, the guide shaft 54 provided on the second lever 51 moves relatively within the guide opening 503 of the first lever 50 with respect to 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 diagram in FIG. 25 shows the automatic closing device 6 in the operating state and in the brake released state. The first lever 50 of the return mechanism 5 is located at a second position close to the automatic closing device 6 side, and the second lever 51 maintains the first posture inclined toward the automatic closing device 6 side, and The guide shaft 54 provided on the 51 is at 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 a contact portion 57 formed upright from the base 55.

The other end of the automatic closing device recovery wire W5 is connected to an automatic closing device recovery 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 inside of the second operation box 10B is opened. The second lever 51 in the first position is moved to the second position by pulling out the end of the automatic closing device recovery wire W5 with the automatic closing device recovery lever 106 stored in the first position and pulling the end through the pulley 107. Rotate. The first lever 50 and the operating rod 60 move from the second position to the first position in conjunction with the rotation of the second lever 51 from the first posture to the second posture. That is, by pulling the wire W5 for restoring the automatic closing device, 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-shaped locking is performed. When the portion 630 slides 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 position, The micro switch 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 the diagram in FIG. 25, when the automatic closing device 6 is operated and the first lever 50 is at the second position, the guide shaft 54 is moved away from the automatic closing device 6 of the guide opening 503 on the second side. When the second lever 51 rotates from the first posture to the second posture, the position of the guide shaft 54 with respect to the rotation support shaft 53 comes into contact with or close to the edge portion 5031 and the second edge portion 5031 abuts. While moving, the first lever 50 is moved to the first position by the guide shaft 54. As is clear from the comparison between FIG. 25 and FIG. 25, the guide shaft 54 is provided with the automatic closing device in FIG. The guide shaft 54 is located on the side away from the automatic closing device 6 in the lower view of FIG. The point of force by pulling the wire W5 for restoring the automatic closing device is on the distal end side of the second lever 51, and the point of action at which the force acts when the second lever 51 rotates is the guide shaft 54 and the second edge 5031 of the guide opening 503. The distance from the rotation fulcrum 53 to the power point is greater than the distance from the rotation fulcrum 53 to the point of action, and constitutes a so-called booster 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 booster mechanism. The operating force can be reduced as compared with a case where the user directly pulls the 60.

The lower diagram of FIG. 25 shows a state in which the automatic closing device recovery wire W5 is pulled to recover the automatic closing device 6, in which a force for pulling the automatic closing device recovery wire W5 is applied, and the second lever 51 is in the second position. 2 in a tilted position. At this time, a force for rotating the second lever 51 from the second inclined posture to the first inclined posture is accumulated by the spring 52. When the pulling force of the automatic closing device recovery wire W5 is released, the second lever 51 is automatically returned to the first posture by the urging force of the spring 52, and the monitoring state or the steady position shown in the upper diagram of FIG. Becomes

[C] Actuator (brake release / return device)
[C-1] Configuration of Operating Unit The configuration of the operating unit 7 will be described with reference to FIGS. The operating part 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 normal posture (during normal electric opening and closing), and each element is in a normal position. 12 and 13 show the movement of the operating unit 7 during the electric descent, FIGS. 14 and 15 show the movement of the operating unit 7 during the operation of the automatic closing device, and FIGS. 16 and 17 show the operation during the manual closing operation from the manual closing device. 3 shows the movement of the operating unit 7. Hereinafter, each element will be described in detail. In the following description, terms such as “up”, “down”, “left”, “right”, “vertical”, and “horizontal”, which represent the orientation and direction of an element, are based on the illustrated embodiment. It is understood by those skilled in the art that, depending on the actual mounting posture of the element, the position may be changed (for example, the upper and lower sides are switched or the left and right sides are switched). In FIGS. 11 to 17, the leftward movement of the first operating body 73 (brake release lever ML) moves in the brake release direction, and the rightward movement of the first operating body 73 (brake release lever ML) that has moved leftward. The movement is movement in the brake return direction. Some elements have been inked for ease of viewing.

As shown in FIG. 18, the frame 70 includes an upper wall 700 and side walls 701 and 702 hanging from left and right ends of the upper wall 700. An opening 7000 is formed in the upper wall 700 to receive the distal end portion of the brake release lever ML movably in the left-right direction. The distal end portion of the brake release lever ML is inserted into the opening 7000 of the upper wall 700 into the frame 70. Is extended. Guide shafts 71 and 72 extending in parallel and horizontally are provided between opposed side walls 701 and 702 of the frame 70. In the illustrated embodiment, a total of four guide shafts including two first guide shafts 71 and two second guide shafts 72 are provided, 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 inside the second guide shafts 72 and are stepped in the height direction. By attaching a U-shaped cover body (not shown) that covers the frame 70 so as to cover the frame 70, the operating unit 7 is prepared as a box body, and the upper wall 700 is made to approach and close the switch M. It is attached.

As shown in FIG. 19, the first operating body 73 includes an upper side 730 extending horizontally, side sides 731 and 732 hanging from opposite left and right ends of the upper side 730, and a center of a lower end of the side side 732. There are two horizontal bent sides 733 formed in the part, and insertion 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 a first wire W2 constituting a return wire is fixed to the right side 732 of the first operating body 73. An insertion groove 7321 for the first wire W2 is formed on the side 732, and a screw hole 7330 is formed on the bent side 733. The insertion groove 7321 communicates with the groove between the bent sides 733, and the locking portion at the end of the first wire W2 of the return wire (having a diameter larger than the groove width of the insertion groove 7321) is provided above the bent side 733. ) Is positioned, and the plate 734 is fixed to the bent side 733 with the screw 735 so as to cover the insertion groove 7321 between the bent sides 733 from below. A pressing piece 736 is formed at the center 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 a second direction (right side in the figure) opposite to the first direction. . The pressing piece 736 of the first operating body 73 at the steady position is separated from the brake release lever ML (may be close to or in contact with the brake release lever ML without being pressed), 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 at the steady position moves in the first direction by the movement of the second operating body 74 in the first direction, and assumes a brake release posture. When the second operating member 74 moves in the first direction, when the automatic closing device 6 is operated, the third operating member 75 is moved in the first direction by the manual closing operation from the manual closing device 10. If you are. When the first wire W2 of the return wire is pulled to the right, the first operating body 73 in the brake release posture moves in the second direction and assumes the brake return posture (steady position). The first operating body 73 at the steady position moves in the second direction by pulling the first wire W2 of the return wire to the right, and the first micro switch SW1 is turned from ON to OFF. That is, the first operating body 73 is at a steady position (brake return position), a position moved in the first direction from the steady position (brake release position), and a position moved in the second direction from the steady position (obstacle detection position). 3).

As shown in FIG. 20, the second operating body 74 includes a horizontal 740 extending horizontally, side sides 741 and 742 extending perpendicularly to left and right ends of the horizontal side 740, and a lower end of the side 741. And two horizontal bent sides 743 formed in the central portion of the first portion. Insertion holes 7410 and 7420 through which the first guide shaft 71 is inserted are formed in the left and right side portions 741 (upper half portion) and 742. An insertion hole 7411 through which the second guide shaft 72 is inserted is formed in a lower half portion of the side 741. One end of a brake release wire W1 extending from the automatic closing device 6 is fixed to the left side 741 of the second operating body 74. A coil spring (not shown) is provided on the first guide shaft 71 between the side wall 701 and the side 741 of the second operating body 74. An insertion groove 7412 for the wire W1 is formed on the 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 a locking portion (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. Then, the plate 744 is fixed to the bent side 743 with the screw 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 normal position, the upper half of the side 741 of the second operating body 74 is in contact with the outer side of the side 731 of the first operating body 73 from the left side, and the first coil spring externally mounted on the first guide shaft 71. One end (left end) of the first coil spring 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 at 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 switchgear M may be provided on the second operating body 74 so that the second operating body 74 can be pulled in the brake releasing direction by the manual wire.

As shown in FIG. 21, the third operating body 75 has a U-shape in a side view from a bottom side 750 extending horizontally and side sides 751 and 752 rising perpendicularly from the left and right ends of the bottom side 750. The left and right sides 751 and 752 are provided 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 on the side 752, and the insertion groove 7521 communicates with the groove 7500 on the bottom side 750. The end of the wire W4 is a locking portion having a diameter larger than the groove width of the insertion groove 7521 and the groove 7500, so that the locking portion at the end of the wire W4 is prevented from coming off. A screw hole 7501 is formed in the bottom side 750 at the center in the width direction and near the side 732 with the groove 7500 interposed therebetween. The plate 753 is brought into contact with the base 750 so as to cover the groove 7500 from below, and the plate 753 is fixed to the base 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 to restrict the movement of the third operating body 75 to the right. A member having a U-shape in cross section is provided at both ends in the width direction of the case 70, and a contact piece 703 is formed from the member (see FIG. 11). The left end of the second coil spring 77 provided on the second guide shaft 72 is in contact with the left side 751 of the third operating body 75, and the right end of the second coil spring 77 is in contact with the contact piece 703. Is in contact with In the normal position, the right side 752 of the third operating body 75 abuts the spacer 755, and the side 741 of the second operating body 74 abuts on the outside of the left side 751 of the third operating body 75. I have. 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 SW1 is a detection unit that detects that an obstacle has been detected when the shutter curtain 1 is powered down. The first micro switch SW1 is a micro switch for detecting an obstacle, and operates when an obstacle is detected. The contact is turned on when monitoring (when the shutter is normally opened and closed) and turned off when the micro switch is operated. Becomes That is, it is assumed that obstacle detection has been performed when the first microswitch SW1 is turned from ON to OFF when the shutter curtain 1 is electrically driven down. When the first micro switch SW1 changes from the ON state to the OFF state when the shutter curtain 1 is powered down, an obstacle detection signal is input to the obstacle detection control panel 11A, and the power drop of the switch M via the shutter control panel 11B is performed. Stop. In the present embodiment, the first microswitch SW1 operates by being turned from ON to OFF, but it is understood by those skilled in the art that the first microswitch SW1 can be designed to operate from here when it is turned OFF.

The first micro switch SW1 is provided at a predetermined position of 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 at the steady position moves by a predetermined amount in the second direction. 70 (in the illustrated embodiment, near one side edge of the upper wall 700 on the side wall 702 side). In the illustrated embodiment, as shown in FIG. 19, both side edges of the upper side 730 of the first operating body 73 on the side 732 side are parallel to the first guide shaft 71 and the edge 7300 and the edge 7300. And a concave portion 7301 formed on the first direction side (the side separated 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 a closed posture (ON state) by contacting the edge 7300 of the first operating body 73, and the first operating body 73 is in the closed state. When the first micro switch SW1 moves from the steady position in the second direction, the first micro switch SW1 is located in the concave portion 7301 of the first operating body 73 and is in an 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 an operation-inhibiting micro switch, which is activated when the automatic closing device 6 is operated or when the manual closing device 10 is manually operated. The contact is OFF when monitoring, and the contact is OFF when activated. Becomes ON. When the second micro switch SW2 changes from OFF to ON, an operation confirmation signal is input to the obstacle detection control panel 11A. Is stopped, and the push button operation is invalidated. In the present embodiment, the first microswitch SW1 operates when it is turned from OFF to ON, but it is understood by those skilled in the art that the first microswitch SW1 can be designed to operate when it is turned from ON to OFF.

The second micro switch SW2 is provided so as to detect the movement of the movable element of the operating section 7 during the operation of the automatic closing device 6 and the manual closing operation from the manual closing device 10. In this embodiment, the second micro-actuator 74 moves from the steady position in the first direction when the automatic closing device 6 is operated or when the manual closing operation is performed from the manual closing device 10. The switch SW2 is positioned on the movement path of the second operating body 74 so that the switch is switched from OFF to ON when the second operating body 74 at the steady position moves by a predetermined amount in the first direction. It is provided at the site. As shown in FIG. 18, a tongue-shaped piece 704 extending vertically to the upper wall 700 is formed at a laterally central portion of a side edge of the upper wall 700, and a second tongue is provided on an inner surface of the tongue-shaped piece 704. The micro switch SW2 is mounted. 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, and when the second operating body 74 is in the normal position, the side 742 and the second micro The switch SW2 is separated, and when the second operating body 74 at the steady position moves in the first direction, the side 742 presses and closes the second microswitch SW2, thereby turning off the second microswitch SW2. Is switched to the ON state.

[C-2] Movement of Actuator during Electric Descent Detection of an obstacle during electric descent will be described with reference to FIGS. 12 and 13. FIG. 12 shows the posture of each element of the operation 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 at the time of 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 in 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. 32 (B), it can be seen that the second wire W3 of the return wire is pulled downward from the state of FIG. 32 (A), and the rotating body 80 rotates 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 changes 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 motorized descent of the switchgear M is stopped via the shutter control panel 11B (in one embodiment, the switch M is once raised and then stopped, that is, stopped. Touch up). In FIG. 13, the second operating body 74 and the third operating body 75 are in the steady positions, and the second micro switch SW2 is in the OFF state. In addition, in the state of FIG. 13, when the obstacle is removed, the pulling force of the first wire W2 of the return wire is lost, 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 turns from OFF to ON. FIG. 32 (C) shows the attitude of the rotating body 80 of the relay device 8 when the operating section 7 returns to the state of FIG. 12, and is substantially the same as the attitude of FIG. 32 (A). FIG. 13 shows a state in which the first operating body 73 has been pulled to the limit position in the second direction. In practice, when the first operating body 73 in the steady position slightly moves in the second direction. Is set so that the first micro switch SW1 is operated to stop the shutter during the electric descent. In the unlikely event that the return wires (first wire W2, second wire W3) are pulled to the limit position in FIG. When the second wire W3 wound three turns slides and the second wire W3 is pulled out, the operating unit 7 and the relay device 8 are not damaged.

[C-3] Movement of Actuator during Self-Descent (by Operation of Automatic Closing Device) Regarding the self-weight drop of the shutter curtain 1 and the detection of obstacles by the operation of the automatic closing device 6, while referring to FIGS. explain. When a fire is detected by the fire detector 6A, a signal (24 VDC) is output from the disaster prevention board 6B, the automatic closing device 6 is operated, 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). As a result, 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 where the brake is released. 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 is rotating.

When the second operating body 74 moves from the steady position in FIG. 11 to the position in FIG. 14, the second micro switch SW2 is turned from OFF to ON, an operation confirmation signal is transmitted to the obstacle detection control panel 11A, and the motor is opened and closed. When the shutter button 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 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 operation is performed while compressing the first coil spring 76. The body 73 moves to the right. When the pressing piece 736 on the right side 731 of the first operating body 73 moves to the right, the force pressing the brake release lever ML to the left (brake release direction) is released, and the brake release lever ML is released. Then, the brake and the brake release lever ML return by the return means built in the brake (FIG. 15). When the brake returns, the shutter curtain during its own descent stops. 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 removal of the obstacle, 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 is released. 1 falls 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 rotates to pull the first wire W2. The state in FIG. 33C is the same as the steady position, and is substantially the same as FIG. 33A. FIG. 33D shows the attitude of the rotating body 80 of the relay device 8 when the operating unit 7 returns to the state of FIG. 14 (during its own weight descent), which is substantially the same as the attitude of FIG. is there. In the state of FIG. 15, the first micro switch SW1 remains ON, and the second micro switch SW2 remains ON.

When it is desired to restore the automatic closing device 6 once activated by the input of the fire detection signal to the monitoring position, 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-shaped locking portion 630 moves while sliding on the upper edge 601 of the operating rod 60 to engage the locked groove 600. By stopping, the latch 63 is set to the first posture, the micro switch MS is turned ON, and the standby state shown in the lower diagram of FIG. 25 is reached, and the second lever 51 is returned, and the monitoring shown in the upper diagram of FIG. 25 is performed. It becomes a state or a steady position.

[C-4] Movement of Actuator during Self-Descent (by Manual Closing Operation from Manual Closing Device) FIGS. 16 and 17 show the self-weight drop of the shutter curtain 1 and the detection of obstacles by manual operation from the manual closing device. This will be described with reference to FIG. When it is desired to perform closing at any time, when the emergency closing switch 103 on the second lid 102 of the second operation box 10B is pressed, the side 752 of the third operating body 75 is pulled rightward in the drawing from the state of FIG. As a result, the wire W4 that maintains the second coil spring 77 in the compressed state is loosened from the tension state, and the compressed second coil spring 77 expands, so that the left end of the coil spring 77 moves to the left, 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. The side wall 741 of the second operating body 74 is pushed to the left by the side wall 751 pushed to the left, and the second operating body 74 moves to the left. 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. When the side 742 of the second operating body 74 moves to the right, the first coil spring 76 , The side 731 of the first operating body 73 is pushed to the left, the pressing piece 736 of the side 731 moves the brake release lever ML to the left (first direction), and releases the brake ( (FIG. 16). At this time, since the sum of the elastic forces of the two first coil springs 76 is larger than the urging force of the brake release lever ML (return force provided by the return means built in the switch M), the first coil springs 76 moves to the left by overcoming the urging force of the brake release lever ML, and moves the brake release lever ML to release the brake. When the brake is released, the shutter curtain 1 starts to descend by its own weight. 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 is rotating.

When the second operating body 74 moves from the steady position in FIG. 11 to the position in FIG. 16 along with the movement of the third operating body 75 in the first direction, the second micro switch SW2 turns from OFF to ON, causing an obstacle. The operation confirmation signal is transmitted to the detection control panel 11A, the push button operation from the manual operation unit is invalidated, 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 moves 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, the force pressing 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 return by the return means (spring member) built in the brake (FIG. 17). When the brake returns, the shutter curtain during its own descent stops. 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. 16, the brake is released, and the shutter curtain is released. 1 falls 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 rotates to pull the first wire W2. The state in FIG. 33C is the same as the steady position, and is substantially the same as FIG. 33A. FIG. 33D shows the posture of the rotating body 80 of the relay device 8 when the operating unit 7 returns to the state of FIG. 16 (during its own weight drop), and is substantially the same as the posture of FIG. 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 it is desired to manually stop the shutter curtain whose weight has been manually lowered again, pulling the rotating lever 104 of the second operation box 10B forward, the wire W4 connected to the third operating body 75 moves to the right. The third operating body 75 is moved 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 at the brake release position by overcoming the return means (spring member) that moves the brake release lever ML in the return direction is released. The brake release lever ML moves rightward together with the first operating body 73 and the second operating body 74 by the force of the return means on the switch 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 come into light contact. When the brake returns, the shutter curtain during its own descent stops. Thus, the brake release lever ML returns to the position shown in FIG.

In the present embodiment, in the obstacle detection at the time of self-weight descent, the brake release lever ML returns and the switchgear opens when the first operating body 73 at the brake return position moves in the second direction to the steady position. The brake of M returns. Here, it is conceivable that the first operating body 73 may move further in the second direction beyond the steady position before the brake is returned due to aging deterioration, adjustment error, or the like. At this time, the first micro switch SW1 is switched from ON to OFF by the movement of the first operating body 73 in the second direction. Here, even when the self-weight descent is performed, the shutter curtain 1 under the self-weight descent is moved when the commercial power is valid by inputting the obstacle detection signal to the obstacle detection control panel 11A. After the obstacle is detected, it can be electrically controlled and stopped.

[D] Control Unit In the electric shutter with the mechanical harm prevention device according to the present invention, different controls are 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 the self-weight descent by the manual closing operation is performed, the control mode is changed from the normal mode to the self-weight descent mode, and the operation control of the shutter curtain 1 is performed in the self-weight descent mode. In the present embodiment, the control unit includes an obstacle detection control panel 11A and a shutter control panel 11B. The details will be described below.

[D-1] Electric open / close mode In the normal mode, the shutter curtain 1 is electrically opened / closed by operating the push button of the open / close operation switch 100. More specifically, when the release switch U is pressed in the fully-open state or the 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 switch M is operated to activate the winding. The take-up shaft 2 is rotated in the first direction and raised while winding up 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 the preset upper limit position, the upper limit switch is activated, the operation of the switch M is stopped, 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 emergency switch 18 is operated to stop the upward movement of the shutter curtain 1 by the switch M.

When the close switch D is pressed in the fully open state or the half open state, a signal is transmitted to the shutter control panel 11B via the obstacle detection control panel 11A, and the switch 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 descends, the second wire W3 is drawn out from the winding drum 91 while extending along the surface of the shutter curtain 1. When the lower seat plate 41 of 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 restricts the second wire W3 from being pulled out. When the upper seat plate 40 moves downward with respect to the lower seat plate 41, the second wire W3 whose pull-out is restricted is pulled, and the first wire W2 is pulled via the relay device 8, thereby causing the first operating body to move. 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. You. 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, one second) via the shutter control panel 11B, and then activates the switch M to release 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 41 of the lower end of the shutter curtain 1 that descends electrically descends on the floor, the lower seat 41 moves upward relative to the upper seat 40, and the pulling out of the second wire W3 is regulated by the lock device 9, When the upper seat plate 40 moves downward with respect to the lower seat plate 41, the second wire W3 whose drawing is restricted is pulled, the first wire W2 is pulled via the relay device 8, and the first operating body 73 is pulled. Moves from the 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 obstacle detection control panel 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 panel 11B (FIG. 37 (2)). The timer is activated when the shutter curtain 1 is lowered to a preset lower limit position during the motorized descent, and if an obstacle detection signal is output during the operation of the timer, touch-up is not performed. When the obstacle detection signal is not output during the operation of the timer, the operation of the switch M is stopped via the obstacle detection control panel 11A and the shutter control panel 11B at the end of the timer to rotate the winding shaft 2. To stop. In particular, when the first micro switch SW1 is set to be sensitive to the position where the first operating body 73 is slightly moved, the self-weight of the second wire W3, the friction between the second wire W3 and the lock drum 90, At the start of electric descent, the second wire W3 is instantaneously pulled down by the force of the mainspring spring contained in the winding drum 91, the inertia of each device, and the first operating body 73 moves in the second direction. It is also conceivable that the first microswitch SW1 operates. For this reason, the control device has a function of not performing control such as stop when the first micro switch SW1 operates within a certain time immediately after the start of the electric descent, and a contact with an obstacle by the function. In order to prevent erroneous operation such as ignoring obstacles in the event of later descent, a function is provided to extend the operation time of reversal rise after detecting obstacles and temporarily stopping, and if necessary It is selectable.

[D-2] When the automatic closing device 6 is operated by the input of the fire detection signal from the self-weight dropping mode disaster prevention board 6B, the wire W1 is pulled to move the second operating body 74 from the steady position in the first direction (in the figure, (Left side), the first operating body 73 moves in the first direction along with the movement of the second operating body 74 in the first direction, and the brake is released. Further, when the tension of the wire W4 is reduced 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 in the first direction (the left side in the figure), With the movement of the third operating body 75 in the first direction, the second operating body 74 and the first operating body 73 move in the first direction, and the brake is released. When the second micro switch SW2 is turned on from OFF to ON by the second operating body 74 moving in the first direction from the steady position, an operation confirmation signal is continuously output from the operating section 7 to the obstacle detection control panel 11A. Then, upon receiving the operation confirmation signal, the obstacle detection control panel 11A changes from the electric open / close mode (normal mode) to the self-weight drop mode (fire mode). When the obstacle detection control panel 11A enters the self-weight descent mode, the electric opening / closing operation of the open / close switch U, the close switch D, and the stop switch S of the open / close operation switch 100 (the push button operation for electric open / close) is invalidated. .

When the lower seat plate 41 of the lower end of the shutter curtain 1 under its own weight falls against an obstacle, the lower seat plate 41 moves up relative to the upper seat plate 40, and the lock device 9 restricts the pulling out of the second wire W3. When the upper seat plate 40 moves downward with respect to the lower seat plate 41, the second wire W3 whose pull-out is restricted is pulled, the first wire W2 is pulled via the relay device 8, and the brake release position is set. The first operating body 73 that has moved to the normal position moves in the second direction toward the steady position, the brake of the switch M returns, and the shutter curtain 1 during its own weight descent stops. When the obstacle is removed, the lower seat plate 41 that has moved upward can be moved downward, the restriction on the extraction of the second wire W3 is released, the first coil spring 76 extends, 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 descends again under its own weight (FIG. 38 (3)). When the lower seat plate 41 of the lower end of the shutter curtain 1 under its own weight descends, the lower seat plate 41 moves up relative to the upper seat plate 40, and the lock device 9 restricts the drawing out of the second wire W3. When the upper seat plate 40 moves downward with respect to the lower seat plate 41, the second wire W3 whose pull-out is restricted is pulled, and the first wire W2 is pulled via the relay device 8, thereby causing the first operating body to move. 73 moves from the brake release position to the steady position, and the brake returns. The brake of the switchgear M returns, the shutter curtain 1 under its own weight descent stops, and the shutter curtain 1 is fully closed (FIG. 38 (3)).

If the first operating body 73 moves beyond the steady position and further moves in the second direction before the brake returns due to aging, adjustment error, or the like, 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 a power failure occurs, no obstacle detection signal is transmitted). At this time, when energization is effective at the time of own weight descent, the obstacle detection control panel 11A, which has received the obstacle detection signal, operates the switch M via the shutter control panel 11B to open the shutter curtain 1. Alternatively, the vehicle 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. 38C).
In addition, the self-weight descent mode is performed by recovering the automatic closing device 6 when only the automatic closing device 6 is activated or when both the automatic closing device 6 and the manual closing device are activated. If it is operating, the manual closing device is returned (by returning operation), the second operating body 74 of the operating section 7 returns to the steady position, the second micro switch SW2 changes from the ON state to the OFF state, and changes to the electric open / close 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 do it.

If the automatic closing device 6 releases the brake during the electric ascent of the shutter curtain, the second operating body 74 and the first operating body 73 at the steady positions move in the first direction, and the second micro switch SW2 Is turned from OFF to ON and the second micro switch SW2 is turned ON, an operation confirmation signal is input to the obstacle detection control panel 11A, and the obstacle detection control panel 11A drops its own weight from the electric open / close mode (normal mode). The mode changes to the fire mode, and at the same time as the input of the operation confirmation signal, the drive of the switch M is stopped via the shutter control panel 11B, and the shutter curtain starts descending under its own weight (FIG. 38 (1)). When the automatic closing device 6 releases the brake during the electric lowering of the shutter curtain, the second operating body 74 and the first operating body 73 at the steady positions move in the first direction, and the second micro switch SW2 is turned on. When the second micro switch SW2 is turned ON from OFF, an operation confirmation signal is input to the obstacle detection control panel 11A, and the obstacle detection control panel 11A switches from the electric open / close mode (normal mode) to its own weight descent mode. (Fire mode), and at the same time as the input of the operation confirmation signal, the drive of the switch M is stopped via the shutter control panel 11B, and the shutter curtain starts to fall by its own weight (FIG. 38 (2)).

[E] Configuration of Seat Plate The configuration of the seat plate 4 provided with the obstacle detection means will be described. The seat plate 4 provided at the lower end of the shutter curtain includes an upper seat plate 40 and a lower seat plate 41 which can move upward relative to the upper seat plate 40. In the present embodiment, the upper seat plate 40 includes an upper surface portion 400, left and right side surface portions 401 hanging from both ends in the width direction of the upper surface portion 400, and a horizontally extending cover member extending from the lower ends of the left and right side surface portions 401 in a direction approaching each other. The upper and lower horizontal seats 411 at the upper end of the lower seat plate 41 are mounted on the abutted pieces 402 of the upper seat plate 40, and the lower seat plate is 41 is suspended (see FIGS. 41 and 43). In a posture in which the lower seat plate 41 has moved up to the upper limit position with respect to the upper seat plate 40, the horizontal portion 414 of the lower seat plate 41 abuts against 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 provided between the upper seat plate 40 and the lower seat plate 41 constituting the seat plate 4 at intervals in the length direction of the seat plate 4. Therefore, the lower end of the shutter curtain 1 abuts against an obstacle during the electric descent or the descent by its own weight, and the lower seat plate 41 is moved relative to the upper seat plate 40. When the lower lever 41 moves relatively upward, 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 via a coil spring 98 to a lower end of a first rotation lever 92 (described later) constituting a lock mechanism of the lock device 9. Have been. When the lower seat plate 41 moves upward 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 connected to the lock device. 9 is pulled in a direction away from the lock drum 90.

When the wire 43 is pulled and the first rotation lever 92 is rotated, the rotation of the lock drum 90 is regulated by the lock mechanism of the lock device 9 (to be described in detail later). Pulling out of the second wire W3 is stopped, and the shutter curtain 1 descends, whereby the second wire W3 is pulled downward, and the first wire W2 is pulled via the relay device 8. Then, the first operating 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 switch M, and the descending shutter curtain 1 is released. Stop.

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

[F] Lock Device The configuration of the lock device 9 will be described in detail with reference to FIGS. Although there is a difference in the shape of the element between FIG. 26 and FIGS. 27 to 30, the components themselves are the same. In addition, reference numbers of the respective elements are described in the most detail in FIG. 27, and should be appropriately referred to. The lock device 9 includes a rotatable lock drum 90, a rotatable winding drum 91, a first pivot lever 92, a second pivot lever 93, and a third pivot lever 94, and includes these components. And a case 95. In the present embodiment, the lock drum 90 is located immediately below the relay device 8, and the winding drum 91 is disposed adjacent to the first side of the lock drum 90, and is connected to the first rotating lever 92. , The second rotating lever 93 and the third rotating lever 94 are arranged adjacent to the second side of the lock drum 90. Normally, the first rotating lever 92, the second rotating lever 93, and the third rotating lever 94 are in the first posture (unlocked posture) (see FIGS. 26 and 30). When the shutter is stopped due to obstacle detection, the first rotating lever 92, the second rotating lever 93, and the third rotating lever 94 are in the second posture (locking posture) (see FIG. 27). While the moving lever 93 maintains the second posture, the locked state of the lock device 9 is maintained even if the first rotating lever 92 starts rotating (see FIGS. 28 and 29).

The case 95 includes an upper plate 950, left and right side plates 951 and 952, a rear plate 953, and a detachable front cover 954 (see FIG. 4), and the lower surface is open. A guide 9500 through which the second wire W3 is inserted is formed in the upper plate 950. As shown in FIG. 26, a front plate 954 ′ is provided on the front side of the lock drum 90 and the winding drum 91 so as to face the rear plate 953 with the lock drum 90 and the winding drum 91 interposed therebetween. The front plate 954 ′ extends so as to cover at least the front side of the center part (the part corresponding to the support shafts 900 and 910) of the lock drum 90 and the winding drum 91. In the illustrated embodiment, the front plate 954 ′ is integrally formed with bent pieces on the upper side and the right side. Fixed. One end of the support shaft 900 and the support shaft 910 is supported by the rear plate 953, and the other end is supported by the front plate 954 '. By supporting the support shaft 900 and the support shaft 910 at both ends, the lock drum 90 and the take-up drum 91 can be rotationally supported more stably than cantilever support. In the embodiment shown in FIG. 26, a guide portion 958 for inserting a wire W3 extending between the lock drum 90 and the winding drum 91 is formed at a 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 bent outward to form bent pieces 956 and 957, respectively. It is attached to the upper surface 400 of the plate 40. Since the case 95 is attached to the upper seat plate 40 using the screws 956A and 957A exposed to the outside, the case 95 can be easily removed at the time of maintenance or the like.

The lock drum 90 includes a support shaft 900 that rotatably supports the lock drum 90, a concave peripheral surface 901 around which a wire is wound, and a peripheral edge of the lock drum 90 (specifically, a thickness direction of the peripheral surface 901 in the thickness direction). A lock drum 90 which is provided on one side and has a large number of tooth-shaped locked portions 903 formed continuously on the periphery of a disk portion 902 having a larger diameter than the peripheral surface 901. In one embodiment, the circumferential dimension of the peripheral surface 901 is such that the wire can be wound three turns in parallel.

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

The first rotation lever 92 is a rotation piece that extends in the up-down direction, and includes a first part 920 on the upper side and a second part 921 extending downward at a slight angle to the first part 920. And a rotation fulcrum 922 (formed by a support shaft P1 protruding from a rear plate 953 of the case 95) formed at a connection portion between the first portion 920 and the second portion 921. The case 95 is movably provided.

The first rotating lever 92 is arranged such that the upper first portion 920 approaches the lock drum 90 in a first direction (locking direction) around the rotation fulcrum 922, and the upper first portion 920 contacts the lock drum 90. Is rotatable in a second direction (a lock release direction) that is away from the lock. At the time of normal opening and closing and at the time of stopping, the first rotating lever 92 is in the first posture in which the upper first portion 920 is rotated to the side separated from the lock drum 90 (see FIGS. 26 and 30), and When the device 9 is in the locked state, the first rotating lever 92 is in the second posture in which the upper first portion 920 is rotated to the side closer to the lock drum 90 (see FIG. 27).

The first rotating lever 92 is urged in a 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 protruding from a rear plate 953 of the case 95 near the lower end of the left side plate 951 of the case 95, and the other end is connected to the first rotating lever. The upper end of the first portion 920 is connected to the side separated from the lock drum 90. A pin P3 as a stopper is projected from a predetermined portion of the rear plate 953 of the case 95, and when the first rotating lever 92 is in the first posture, the first portion 920 of the first rotating lever 92 is moved. The part on the side separated from the lock drum 90 is in contact with the pin P3.

A lower portion of the second portion 921 of the first rotating lever 92 extends downward from a lower end of the case 95, and a hook-shaped engaging portion 92A (see FIG. 26) is formed at the lower end. The end of the wire 43 (when the coil spring 98 (see FIGS. 39 and 40) is connected to the end of the wire 43, the end of the coil spring 98) is detachably engaged with the engaging portion 92A. Have been. When the lower seat plate 41 is pulled by the wire 43 in conjunction with the upward movement, the first rotating lever 92 overcomes the urging force of the coil spring 96 and rotates in the first direction. The locking portion 92A has, on the lower end side of the first rotating lever 92, an opening formed on the side opposite to the side on which the wire 43 extends, a groove extending downward from the opening, and a side opposite to the side on which the wire 43 extends by the groove. And the bottom of the groove is slightly bulged toward the wire 43, and the upper end of the rising is formed to be thick adjacent to the opening. The shape of the locking portion 92A is formed such that the wire 43 does not come off from the locking portion 92A when the first rotating lever 92 is in any rotating posture during the operation of the mechanical harm prevention device. Have 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-shaped rotating piece having short sides 930 and 931 and a long side 932. The second rotating lever 93 has the short side 931 facing the lock drum 90 and the short side 931 and the long side 932. Is provided on the case 95 so as to be rotatable around a rotation fulcrum 933 (formed by a support shaft P1 protruding from a rear plate 953 of the case 95) formed in the vicinity of a vertex located on the lower side of the case 95. 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 near the vertex formed by the short sides 930 and 931, and a contact portion 935 is formed near the long side 932 so as to be separated from the locking portion 934. A contact portion 936 is formed near the vertex formed by the short side 930 and the long side 932. The locking portion 934 of the second rotating lever 93 has a shape that can be engaged and disengaged with the locked portion 903 (tooth of the gear) of the lock drum 90.

In the present embodiment, the second rotating 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 contact portion 935 is a pin that connects between two plates, and the contact portion 936 is rotatably mounted on a pin that connects between two plates. Bearings. Note that the configuration including two plates is only one mode of the second rotation lever 93.

The second rotation lever 93 can rotate around a lower rotation fulcrum 933 in a first direction in which the upper side approaches the lock drum 90 and a second direction in which the upper side moves away from the lock drum 90. It has become. At the time of normal opening / closing and stop, the second rotating lever 93 is in the first posture in which the upper side is rotated to the side separated from the lock drum 90 (see FIGS. 26 and 30), and the lock device 9 is in the locked state. , The second rotation lever 93 is in the second posture in which the upper side has turned to the side close to the lock drum 90 (see FIG. 27). When the second rotation lever 93 is in the first position, the locking portion 934 is in a non-locked state separated from the locked portion 903 of the lock drum 90, and the contact portion 935 has the first locking position. A portion of the first portion 920 of the rotating lever 92 closer to the lock device is in contact. When the second rotation lever 93 is in the second position, the locking portion 934 is in a locked state in which the locking portion 934 is locked to the locked portion 903 of the lock drum 90. When the locking portion 934 of the second rotating lever 93 and the locked portion 903 of the lock drum 90 are locked, the rotation of the lock drum 90 is restricted, and the lock device 9 is restricted from pulling out the wire W3. Locked state.

The second rotating 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 protruding from a rear plate 953 of the case 95 near the lower end of the left side plate 951 of the case 95, and the other end is connected to the second pivot lever. 93 are connected to the contact portion 935. In the illustrated embodiment, a coil spring 97 for urging the second rotation lever 93 in the second direction and a coil spring 96 for urging the first rotation 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 forming the contact portion 935 also serves as the connection 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 the upper portion of the first portion 920 of the first rotation lever 92 on the side closer 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 rotating lever 92 overcomes the urging force of the coil spring 96 and rotates in the first direction, the first rotating lever 92 When the one part 920 pushes the contact part 935 of the second rotating lever 93, the second rotating lever 93 overcomes the urging force of the coil spring 97 and rotates in the first direction. As the second rotation lever 93 rotates in the first direction, the locking portion 934 of the second rotation lever 93 that has been separated from the locked portion 903 of the lock drum 90 is It is locked to the locked portion 903 to be in a locked state.

The third rotation lever 94 is a member that is located above the first rotation lever 92 and the second rotation lever 93 and extends in the lateral direction, and is in the locked state (second posture). A rotation restricting unit that restricts 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 rotatably provided on the case 95 with an end near the lock drum 90 as a rotation fulcrum 940, and an end far from the lock drum 90 rotates vertically. It is possible. The rotation fulcrum 940 is formed by a support shaft P4 protruding from the rear plate 953 of the case 95.

When the first rotating lever 92 and the second rotating lever 93 are in the first position, the third rotating lever 94 has a distal end located farther from the lock drum 90 at the first position (upper side). When the first rotating lever 92 and the second rotating lever 93 are in the second posture, the tip is turned to the second position (downward). It is in the moved second posture (see FIG. 27).

The lower portion of the third rotating lever 94 extending in the lateral direction is provided with the locking device 9 in the locked state, that is, the first rotating lever 92, the second rotating lever 93, and the third rotating lever 94. A locking portion 941 that locks with the contact portion 936 of the second rotating lever 93 when in the second posture is formed. A contact portion 942 is formed at a lower portion of the third rotating lever 94 at a position on the distal end side with respect to the locking portion 941.

In the present embodiment, the third rotating lever 94 includes two opposed plates, the support shaft P4 is provided between the two plates, and the locking portion 941 is provided between the leading ends of the two plates. And the contact portion 942 is a bearing rotatably mounted on a pin connecting the two plates. The configuration composed of two plates is only one mode of the third rotating lever 94, and the locking portion 941 may be integrally formed. In the illustrated embodiment, the locking portion 941 has a stepped shape in a side view, but the shape of the locking portion 941 is not limited and may be a claw shape or a projection shape.

When the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 are in the first position, the corner of the locking portion 941 of the third rotation lever 94 is moved to the second rotation lever 93. And the tip of the third rotating 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 in the third position. The contact 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. Is in contact with The contact state between the contact portion 923 of the first pivot lever 92 and the contact portion 942 of the third pivot lever 94, and the engagement between the contact portion 936 of the second pivot lever 93 and the third pivot lever 94 In the state where the portion 941 faces the locking side 9410 (see FIG. 27) or the locking state (see FIG. 28), at least the first rotation lever 92 rotates a predetermined amount from the second posture in the second direction. It will be maintained for a while. When the third rotation lever 94 in the second posture is rotated 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 peripheral projecting piece 943 is formed on the distal end side of the third rotating lever 94, and when the third rotating lever 94 is in the first posture, the projecting piece 943 contacts the left side piece 951. The third rotation lever 94 is further restricted from rotating upward. This prevents the third pivot lever 94 from jumping up when pivoting from the second posture to the first posture.

The operation of the lock device will be described. When the shutter curtain 1 starts descending, the lock device 9 (the lock drum 90 and the winding drum 91) provided on the seat plate 4 also descends with the descending of the seat plate 4, and with the descending of the lock device 9, Overcoming the force of the mainspring, the second wire W3 is drawn 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 shutter curtain 1 that is descending comes into contact with an obstacle, the lock device 9 is moved in conjunction with the lower seat plate 41 moving up relative to the upper seat plate 40 to lock the drum. It operates so that rotation of 90 is regulated. When the lower end of the shutter curtain 1 under its own weight abuts against an obstacle and the lower seat plate 41 moves upward relative to the upper seat plate 40, the detection lever 42 is moved in conjunction with the upward movement of the lower seat plate 41. It is designed to rotate. The 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 a first rotation lever 92 via a coil spring 98. When the lower seat plate 41 moves relatively upward with respect to the upper seat plate 40, the detection lever 42 pivots in a direction away from the lock drum 90, pulls the wire 43 in a direction away from the lock drum 90, and The rotation lever 92 rotates from the first posture to the second posture.

When the first rotation lever 92 rotates from the first posture shown in FIG. 26 in the first direction, the first portion 920 of the first rotation lever 92 comes into contact with the contact portion 935 of the second rotation lever 93. By pressing while contacting, the second rotating lever 93 in the first posture rotates in the first direction together with the first rotating lever 92, and the locking portion 934 of the second rotating lever 93. Locks on the toothed 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 pivot lever 94 in the first posture contacts the contact portion 936 of the second pivot lever 93 in the first posture, thereby causing the third pivot lever 94 to move downward. Rotation is regulated. When the second rotation lever 93 in the first posture rotates together with the first rotation lever 92 in the first direction, the abutment portion 936 of the second rotation lever 93 causes the third rotation lever 94 to rotate. At the same time that the third rotating lever 94 is moved downward by its own weight to be in the second posture, the third rotating lever 94 is rotated downward by its own weight (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 position of the second rotation lever 93 is held by the first portion 920 of the first rotation lever 92 in the second position abutting on the contact portion 935 of the second rotation lever 93. The second posture of the third rotation lever 94 is maintained by the contact portion 923 of the first rotation lever 92 contacting the contact portion 942 of the third rotation lever 94. Therefore, 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 rotation of the lock drum 90 is restricted when the device 9 is in the locked state.

When the rotation of the lock drum 90 stops, the pulling out 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) descends with respect to the lower seat plate 41. Then, the first wire W2 is pulled via the second wire W3 and the relay device 8, and the first operating body 73 slides in the second direction. During the electric descent, the first operating body 73 at the steady position moves in the second direction, the first micro switch SW1 is turned from ON to OFF, and an 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 that have been transmitted to the control panel 11A for receiving the obstacle detection signal, and the descent of the shutter curtain 1 is stopped. When the self-weight is falling, the first operating body 73 at the brake release position moves to the steady position (brake return position), so that the brake release lever ML returns and the brake returns, and the winding shaft 2 The rotation is regulated and the descent of the shutter curtain 1 stops.

Here, in order to return the brake, it is necessary to pull the return wires (the first wire W2 and the second wire W3) by a predetermined amount (that is, the shutter curtain 1 needs to be lowered by a predetermined amount) and hit an obstacle. Desirably, the lower seat plate 41 has an upward movement stroke corresponding to the amount of descending of the shutter curtain 1 that only returns the brake. Further, in addition to the upward movement stroke, it is desirable that the lower seat plate 41 has a marginal stroke so as to be able to move upward relative to the upper seat plate 40. With this extra stroke, when an obstacle comes into contact with the lower seat plate 41, only the load of the lower seat plate 41 can act on the obstacle, and the load of the entire shutter curtain acts on the obstacle. . Here, it is publicly known that the seat plate 4 is composed of the lower seat plate 41 that moves up relative to the upper seat plate 40, but in the present embodiment, the movable distance of the lower seat plate 41 with respect to the upper seat plate 40 is Is larger than the conventional movable distance. Specifically, the 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. The first movement amount (for locking) in which the two-rotation lever 93 is locked to the lock drum 90 to regulate the rotation of the lock drum 90 and regulate the drawing out of the return wire stored in the winding drum 91. The first pivot lever 92 and the second pivot lever 93 need to be pivoted first), and the upper seat plate 40 moves 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 until the return wire whose pull-out is restricted is pulled downward to return the brake (it is necessary to pull the return wire downward after locking) and the shutter car 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 if the upward movement stroke of the lower seat plate 41 is small, the return wire may be operated in the middle of the return wire (for example, the relay device 8) or the return wire (the first wire W2). The brake is provided by providing a mechanism (for example, a link mechanism) that is located at a connection portion with the operating mechanism of the portion 7 and that takes out a towing 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 no longer pulled, the first rotating lever 92 in the second position starts rotating in the second direction by the force of the coil spring 96. I do. As described later, in the present 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 arc shape, and slides against the peripheral surface of the contact portion 942 of the third rotation lever 94 at the beginning of rotation. The first rotating lever 92 starts rotating in the second direction, while the second rotating lever 93 maintains the second posture (locked state) (FIG. 28). As can be seen by comparing FIG. 27 and FIG. 28, the second posture is provided in 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 rotating lever 92 in the second direction is rotated in the second direction, the second rotating lever 93 is also slightly rotated in the second direction, but the locked state is maintained, and The locking portion 934 of the moving lever 93 and the locked portion 903 of the lock drum 90 are in a locked state.

From the point in time when the first pivoting lever 92 has pivoted a predetermined amount, the contact portion 923 of the first pivoting lever 92 comes into contact with the contacting portion 942 of the third pivoting lever 94 to act, and the third pivoting lever 92 is actuated. When the contact portion 942 on the distal end side of the 94 is pushed upward in conjunction with the rotation of the first rotating lever 92 and the third rotating lever 94 is pushed up by a predetermined amount, the locking of the third rotating lever 94 is stopped. The locked state between the portion 941 and the contact portion 936 of the second rotating lever 93 is released (the locked state of the second rotating lever 93 is maintained until immediately before the released locked state), 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 rotation 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, and the locking portion 934 is locked by the lock drum 90. , And the lock drum 90 can be rotated (FIG. 30).

In the present embodiment, the second wire W3 is wound separately by the lock drum 90 and the winding drum 91. When both a winding mechanism and a locking mechanism for a wire are provided on one rotating body (the scope of the present invention includes such an embodiment), the wire is randomly wound around the rotating body and wound in multiple layers. There is a possibility that the so-called winding drawing may occur due to the outer wire biting into the bent wire. When the wire is drawn down, there is a possibility that the wire will be smoothly fed out and wound. In the present embodiment, the second wire W3 is first wound around the lock drum 90 three times and then wound around the winding drum 91, and the force that can be generated on the second wire W3 is To act on. Here, since the second wire W3 is wound on the peripheral surface 901 of the lock drum 90 one layer (three parallel windings), even if a force acts on the second wire W3, the rotation of the rotating lock drum 90 is prevented. Even if it stops suddenly, the wire does not squeeze. Further, by winding the second wire W3 around the lock drum 90 a plurality of times, the second wire W3 is prevented from slipping on the peripheral surface 901 of the lock drum 90, and the lock drum 90 and the winding drum 91 rotate together. It has become. Further, since the winding drum 91 has a built-in spring for biasing the second wire 3 in the winding direction, even if the lock drum 90 is locked and the rotation is stopped, the second wire W3 is not loosened. Does not occur. Further, when the shutter curtain 1 is raised in the locked state, the second wire W3 wound around the lock drum 90 three times is loosened, but the loosened second wire W3 is transferred to the winding drum 91 having a built-in spring. Since it is wound, the second wire W3 does not loosen. Touch-up of the shutter curtain 1 at the time of obstacle detection can be performed without waiting for the lock release delayed by the delay mechanism, and the time from the stop of the shutter curtain 1 to the touch-up can be shortened. it can. Further, at the time of detecting an obstacle, the second wire W3 wound three turns around the lock drum 90 pulls the second wire W3 downward. Is applied, the second wire W3 wound three turns around the lock drum 90 slides to lower the shutter curtain 1, thereby preventing the second wire W3 from being cut.

The lower end of the first rotating lever 92 is connected to the wire 43 via a coil spring 98, and the coil spring 98 forms a buffer spring. In order to return 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 by the second rotation lever 93. Even after the stop portion 934 is locked to the toothed locked portion 903 of the lock drum 90, it is necessary to relatively move upward. At this time, the extension of the coil spring 98 causes a load on the wire 43 and the locking portion (the locking portion 934 and the locked portion 903) due to the upward movement of the lower seat plate 41 after the lock drum 90 is locked. Is relaxing. More specifically, after locking (after the locking portion 934 is locked to the locked portion 903), the upper seat plate 40 further moves down with respect to the lower seat plate 41, so that only the amount of the downward movement is obtained. The return wire is pulled down. At the same time, the detection lever 42 is further rotated upward by the downward movement of the upper seat plate 40, and the wire 43 is further pulled. At this time, the coil spring 98 is extended, so that the second rotation lever 93 is locked. 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 lock device 9 described above is one embodiment, and does not limit the scope of the present invention. In the illustrated embodiment, the lock drum 90 and the take-up drum 91 are adjacent to each other, but the lock drum 90 and the take-up drum 91 are separated from each other (as a non-limiting example, from the radial dimension to the diameter of these drums). It may be arranged. In the present embodiment, the lock drum 90 and the take-up drum 91 are provided separately, and the lock drum 90 is locked. However, the lock drum 90 is locked. 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 arranged only on one side of the lock drum 90. And a pair of left and right first rotation levers connected to wires connected to the respective detection levers may be provided. In the illustrated embodiment, three rotation levers (the first rotation lever 92, the second rotation lever 93, and the 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 controls the return wire withdrawal by the upward movement of the lower seat plate 41. For example, the locking device need not include a winding drum. That is, the winding drum may be provided in a place different from the lock device (for example, a portion of the seat plate separated from the lock device, a portion above an opening such as a lintel, an inside of a guide rail, or the like). An aspect in which the winding drum is provided in the lintel portion is disclosed in, for example, Patent Document 1. Further, the return wire is not necessarily limited to the one wound around the winding drum. For example, the lower end of the return wire may be guided inside the guide rail by a pulley, and the lower end may be fixed to the floor or the guide rail. . The lock device is not necessarily limited to a device provided with a lock drum, and may be, for example, a device that mechanically restricts withdrawal of the return wire by a holding unit or a pressing unit. The lock device is not necessarily limited to a configuration in which all the components are provided on the upper seat plate, and includes a mode in which some of the components of the lock device are provided on the lower seat plate.

[G] Self-weight re-descent delay mechanism As described above, after the removal of the obstacle, the lower seat plate 41 moves downward relative to the upper seat plate 40, and the lock device 9 is unlocked. The return wire (the first wire W2 + the second wire W3) can be pulled out, the brake of the switch M is released by the operation mechanism of the automatic closing device 6, and the shutter curtain 1 descends again by its own weight. Here, a damping mechanism is provided 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 reducing the speed of the movable lock portion in the second position, which is the lock position, and rotating the movable lock portion to the first position to release the withdrawal regulation of the return wires (the first wire W2 and the second wire W3). Delay. In other words, by delaying the timing at which the lock device 9 in the locked state becomes the unlocked state and allowing the return wires (the first wire W2 and the second wire W3) to be pulled out, the shutter curtain 1 has its own weight after removing the obstacle. The time until the 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 winding drum 91, a first rotation lever 92, a second rotation lever 93, and a third rotation lever 94. It has. For the details of the configuration and operation of the lock device 9, the above description can be referred to. For the elements having the same reference numerals, the above description can be referred to. The dead weight re-descent delay mechanism in the present embodiment is the delay mechanism 46 that delays the 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 connection bar 462, and a support plate 463. The support plate 463 extends vertically, and is provided so as to hang down from the upper surface portion 400 of the upper seat plate 40 by fixing the upper end to the lower surface of the upper surface portion 400 of the upper seat plate 40. A rotary damper 460 is fixed to a surface of the support plate 463.

The rotation arm 461 has a vertical posture extending substantially vertically, and the base end (upper end) of the rotation arm 461 is connected to the rotary damper 460, and the front end (lower end) is connected to one end of the connection bar 462. It is connected to a nearby site. The connection bar 462 extends in the length direction of the seat plate 4, and one end of the connection bar 462 is connected to the wire 43 via the coil spring 98, and the other end of the connection bar 462 is connected to the first end. It is connected to the lower end of the moving lever 92. The connection 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 rotates in the first direction and the second direction in conjunction with the left and right movement of the connection 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 any resistance to the rotation of the rotation arm 461 in the first direction. By providing 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 turning lever 92 in the second direction are reduced.

A plurality of detection levers 42 are provided on the upper seat plate 40 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. The seat plate 4 is in a state where the lower seat plate 41 is suspended from the upper seat plate 40 in a normal posture. Specifically, as shown in FIG. The contact piece 411 formed on the upper end of the left and right side face part 413 of the lower seat plate 41 is hooked to the contact piece 402 formed at the lower end of the side face part 401 of Suspended vertically. As shown in FIG. 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. A space is provided to allow the lower seat plate 41 to tilt in the front-rear direction with respect to 40, so that even if the floor surface is inclined, it is possible to cope well.

The detection lever 42 has an abutted portion 420. In the normal posture shown in FIGS. 41 and 43, the abutment piece 411 of the lower seat plate 41 approaches the abutted portion 420 of the detection lever 42 from below. ing. When an obstacle hits the lower surface 410 of the lower seat plate 41 and the lower seat plate 41 moves upward with respect to the upper seat plate 40, the abutting piece 411 of the lower seat plate 41 abuts against the abutted portion 420 from below. The detection lever 42 pivots in a direction away from the lower end of the first pivoting lever 92, and the wire 43 pivots the first pivoting lever 92 in the first direction. Go to In a posture in which the lower seat plate 41 has 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). ). In addition, when it comes into contact with an obstacle, the self-weight drop and the electric drop are stopped 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. 26 to 30 for the operation of the lock device 9 as appropriate. When the lower end of the shutter curtain 1 under its own weight abuts against an obstacle and the lower seat plate 41 moves upward relative to the upper seat plate 40, the detection lever 42 is moved in conjunction with the upward movement of the lower seat plate 41. It is designed to rotate. The lower end portions (in the 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 a first rotation lever 92 via a coil spring 98 and a delay mechanism 46. . When the lower seat plate 41 moves relatively upward with respect to the upper seat plate 40, the detection lever 42 pivots in a direction away from the lock drum 90, pulls the wire 43 in a direction away from the lock drum 90, and 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 due to the movement of the connection bar 462, so that the one- One rotation lever 92 rotates.

When the first turning lever 92 turns from the first posture (FIG. 26) in the first direction, the first portion 920 of the first turning lever 92 comes into contact with the contact portion 935 of the second turning lever 93. By pressing while contacting, the second rotating lever 93 in the first posture rotates in the first direction together with the first rotating lever 92, and the locking portion 934 of the second rotating lever 93. Locks on the toothed 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 pivot lever 94 in the first posture contacts the contact portion 936 of the second pivot lever 93 in the first posture, thereby causing the third pivot lever 94 to move downward. Rotation is regulated. When the second rotation lever 93 in the first posture rotates together with the first rotation lever 92 in the first direction, the abutment portion 936 of the second rotation lever 93 causes the third rotation lever 94 to rotate. At the same time that the third rotating lever 94 is moved downward by its own weight to be in the second posture, the third rotating lever 94 is rotated downward by its own weight (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 position of the second rotation lever 93 is held by the first portion 920 of the first rotation lever 92 in the second position abutting on the contact portion 935 of the second rotation lever 93. The second posture of the third rotation lever 94 is maintained by the contact portion 923 of the first rotation lever 92 contacting the contact portion 942 of the third rotation lever 94. Therefore, 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 rotation of the lock drum 90 is restricted when the device 9 is in the locked state.

When the rotation of the lock drum 90 stops, the pulling out 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) descends with respect to the lower seat plate 41. Then, the first wire W2 is pulled via the second wire W3 and the relay device 8, and the first operating body 73 slides in the second direction. During the electric descent, the first operating body 73 at the steady position moves in the second direction, the first micro switch SW1 is turned from ON to OFF, and an 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 that have been transmitted to the control panel 11A for receiving the obstacle detection signal, and the descent of the shutter curtain 1 is stopped. When the self-weight is falling, the first operating body 73 at the brake release position moves to the steady position (brake return position), so that the brake release lever ML returns and the brake returns, and the winding shaft 2 The rotation is restricted and the descent of the shutter curtain 1 stops.

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 rotation. At this time, resistance is given to the rotation of the rotation arm 461 in the second direction by the one-way rotary damper 460 of the delay device 46, and the rotation arm 461 is slowly rotated in the second direction. The connection bar 462 which has been pulled in 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.

From the point in time when the first pivoting lever 92 has pivoted a predetermined amount, the contact portion 923 of the first pivoting lever 92 comes into contact with the contacting portion 942 of the third pivoting lever 94 to act, and the third pivoting lever 92 is actuated. When the contact portion 942 on the distal end side of the 94 is pushed upward in conjunction with the rotation of the first rotating lever 92 and the third rotating lever 94 is pushed up by a predetermined amount, the locking of the third rotating lever 94 is stopped. The locked state between the portion 941 and the contact portion 936 of the second rotating lever 93 is released (the locked state of the second rotating lever 93 is maintained until immediately before the released locked state), 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 rotation 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, and the locking portion 934 is locked by the lock drum 90. , And the lock drum 90 can be rotated (FIG. 30).

In the present embodiment, by using the delay device 46 provided on the seat plate, the time until the locked state of the lock device 9 is released after removing the obstacle is delayed, and after a predetermined delay, the locked state (engagement state) is reduced. (Stop state) is instantaneously released, thereby realizing a mechanism for delaying the timing at which the shutter curtain once stopped by the obstacle detection is lowered again. More specifically, in the present embodiment, the rotation lock lever includes two members (a first rotation lever 92 that rotates in association with the upward movement of the lower seat plate, and a second rotation that locks 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 rotation lever 93 is configured to rotate in the second direction when the first rotation lever 92 rotates a predetermined amount in the second direction to release the locked state. By slowly rotating the first rotating lever 92 in the second direction, the timing of releasing the locked state is delayed, and the time from when the obstacle is removed to when the shutter curtain is re-lowered is delayed. Let it.

The specific configuration of the electric shutter with the mechanical harm prevention device has been described above in detail with reference to the drawings, but these descriptions are merely examples of the electric shutter with the mechanical harm prevention device. It does not limit the configuration of the present invention described in the section.

5 Return mechanism 50 First lever 503 Guide opening 51 Second lever 52 Spring 53 Rotation fulcrum 54 Guide shaft 6 Automatic closing device 60 Operating rod 7 Operating portion W1 Brake release wire W5 Automatic closing device recovery wire

Claims (7)

Switchgear with brake,
A first position in the standby state, being movable between a second actuated position, to release the brake by moving the second position from the first position, a movable element Automatic closing device,
A manual closing device for releasing the brake by manual operation;
A recovery device for the automatic closing device,
A shutter with
The restoration device restores the movable element of the automatic closing device moved to the second position to the first position without interlocking with the manual closing device,
A movable mechanism,
An automatic closing device restoring operation body,
The movable mechanism, the automatic closing device recovery operation body, which connects the automatic closing device recovery wire independent of the manual closing device ,
A booster mechanism provided on the movable mechanism, for reducing an operating force by the automatic closing device recovery wire,
With
The movable mechanism allows the movable element to move from a first position to a second position, and when the automatic closing device restoration wire is pulled by the automatic closing device restoration operation body, the booster mechanism. Thereby, the movable element in the second position is forcibly moved to the first position.
Shutter . The movable mechanism,
A first movable body coupled to the movable element and integrally movable with the movable element between a first position in a standby state and a second position in an active state;
A second movable body to which one end of the automatic closing device restoration wire is connected, and which is movable between a first posture and a second posture;
Linking means for applying a moving force of the second movable body to the first movable body;
With
The cooperation means allows the second movable body to move from the first position to the second position of the movable element and the first movable body while maintaining the first posture, and When the automatic closing device restoring operation body pulls the automatic closing device restoring wire to move from the first position to the second position, the booster mechanism causes the first movable body and the first movable member in the second position to be moved. Configured to forcibly move the movable element to the first position;
The shutter according to claim 1. 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 closing device restoration wire is greater than the distance from the rotation fulcrum to the point at which the turning force of the second movable body acts on the first movable body. Is also big,
The shutter according to claim 2. The cooperation means is
A guide opening formed in the first movable body and extending in the moving direction of the first movable body;
A guide shaft formed in the second movable body and inserted through the guide opening;
When the first movable body is at the first position, the guide shaft is at the first position within the guide opening, and when the first movable body is at the second position, the guide shaft is within 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 relatively moves from the first position to the second position within 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. Function as a point and force is transmitted to the first movable body,
The shutter according to claim 3. The second movable body is urged by an urging 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,
The shutter according to claim 2 . The automatic closing device recovery operation body is stored in an operation box,
The shutter according to claim 1. An automatic closing device with a recovery device,
The automatic closing device is movable between a first position in a standby state and a second position in an operating state, and releases the brake by moving from the first position to the second position. With movable elements,
The recovery device,
A movable mechanism,
An automatic closing device restoring operation body,
An automatic closing device restoring wire connecting the movable mechanism and the automatic closing device restoring operation body,
A booster mechanism for reducing the operating force by the automatic closing device recovery wire,
With
The movable mechanism,
A first movable body coupled to the movable element and integrally movable with the movable element between a first position in a standby state and a second position in an active state;
A second movable body to which one end of the automatic closing device restoration wire is connected, and which is movable between a first posture and a second posture;
Linking means for applying a moving force of the second movable body to the first movable body;
With
The cooperation means allows the second movable body to move from the first position to the second position of the movable element and the first movable body while maintaining the first posture, and When the automatic closing device restoring operation body pulls the automatic closing device restoring wire to move from the first position to the second position, the booster mechanism causes the first movable body and the first movable member in the second position to be moved. Configured to forcibly move the movable element to the first position;
Automatic closing device.

Images