JP5902787B2 - Switchgear - Google Patents

Description

  The present invention relates to an opening / closing device that stops the closing operation of the opening / closing body when the opening / closing body that performs the closing operation comes into contact with an obstacle on the closing direction thereof, and more particularly, a fire prevention shutter for fire prevention, smoke prevention, etc. It is related with a suitable opening and closing device.

As a prior art related to the present invention, there is an open / close device described in Patent Document 1, for example, as an invention for stopping the closing operation of an open / close body by detecting an obstacle.
In this opening / closing apparatus, when the opening / closing body (shutter curtain 2) in the closing operation comes into contact with an obstacle on the closing direction side, the movable seat plate (lower seat plate 101) at the lower end of the opening / closing body is obstructed. The sensor unit (microswitch 105) senses the elevation of the movable seat plate, and transmits the sensing signal to the control device (8) by the code (11a to 11c). The opening / closing device (7) is controlled by a control signal from the control device (8) to stop the closing operation of the opening / closing body (shutter curtain 2).
The switchgear having such a structure is normally equipped with a battery so that the switchgear (7) can be controlled even in the event of a power failure due to a fire or the like. In order to maintain the battery, it is generally necessary to replace the battery regularly. When the battery power cannot be sufficiently obtained due to poor maintenance, the opening / closing body (shutter curtain 2) is lowered. There is a risk that the opening / closing body being lowered cannot be stopped due to obstacle detection, or the opening / closing body cannot be lowered again after the obstacle is removed.

Therefore, there is an invention disclosed in Patent Document 2, for example, as a conventional technique in which obstacle detection is transmitted by a mechanical structure and the closing operation of the opening / closing body is stopped.
In this conventional invention, the winding body (a2) urged in the winding rotation direction by the urging member is supported on the movable seat plate (13) at the lower end of the opening / closing body main body (11), and the string-like member (a1) is supported. ) Is fastened to the operation portion (a3) of the brake mechanism (42), and the other end is wound around the winding body (a2), and the movable seat plate (13) is opposed to the opening / closing body main body (11). ) Moves in the opening direction, the winding body (a2) is brought into sliding contact with the opening / closing body main body (11) to stop the rotation of the winding body (a2) and to apply tension to the string-like member (a1). The brake mechanism (42) is operated from the released state to the braked state by the tension.

  However, in the prior art, since the winding body is disposed in the movable seat plate, it is necessary to secure a mounting space for the winding body in the movable seat plate, Due to the weight of the winding body, etc., there is a risk that the operation of the movable seat plate will become dull, or the bias in the opening / closing body width direction will occur. Moreover, there is a possibility that the maintenance work for the winding body becomes difficult.

JP 2004-308222 A JP 2008-208595 A

  This invention makes it an example of a subject to cope with such a problem. That is, it is an object of the present invention to improve the operability of the movable seat plate, to reduce the size of the movable seat plate, and to more quickly stop the opening / closing body closing operation by obstacle detection.

One means for solving the above problems is an opening / closing body main body that can be closed downward while sliding, and a movable body that is connected to the lower end of the opening / closing body main body and can move upward relative to the opening / closing body main body. a seat plate, a brake can brake mechanism closing operation of the opening and closing body, a winding body which is urged winding direction is rotatably supported on the closing body, the engagement the winding-up body And an engagement portion provided so as to brake the rotation of the winding body, and one end side is wound around the winding body and the brake mechanism is braked by tension on the other end side. A string-like member and an auxiliary rotating body that rotates synchronously with respect to the winding body, and the engaging portion is engaged with the auxiliary rotating body by ascending the movable seat plate relative to the opening / closing body body. switchgear in string-like member so as to cause the tension And an engagement rotation member supported by the opening / closing body main body so as to rotate when the movable seat plate is raised relative to the opening / closing body main body. The engaging portion is provided around a center portion, and a concave portion that engages with the engaging portion is provided on an outer periphery of the auxiliary rotating body, and the wound rotating body is coaxially and integrally engaged with the rotating body. The outer peripheral portion of the engaged rotating body is engaged with the outer peripheral portion of the auxiliary rotating body, and the auxiliary rotating body is rotated synchronously. When the rotary member is rotated by ascending, the engaging portion is fitted to both of the rotary members in a lower valley portion between the auxiliary rotary member and the engaged rotary member. .

Since the present invention is configured as described above, the following effects can be obtained.
Since the winding body is not provided in the movable seat plate and is provided in the opening / closing body body, the movable seat plate can be reduced in size, and the operation of the movable seat plate becomes dull or biased in the opening / closing body width direction due to the weight of the winding body Thus, the opening / closing body closing operation due to the obstacle detection can be stopped more quickly. Moreover, the maintainability with respect to a winding body etc. can also be improved.

It is a front view which shows an example of the switchgear concerning this invention. It is a principal part structure figure which shows an example of the switch used for the switchgear, and an automatic closing device. It is a schematic diagram which shows the action | operation state of a brake mechanism and an automatic closing device, (a) shows the normal state corresponding to the full open stop state of an opening-closing body, (b) is a brake mechanism releasing operation by the action | operation of an automatic closing device. (C) shows the state in which the brake mechanism is braked by the tension acting on the string-like member. It is a principal part perspective view which shows an example of the switchgear concerning this invention. It is principal part sectional drawing of the switchgear, (a) shows the state in which the opening / closing body is closing, (b) shows the state which the opening / closing body contacted the obstacle. It is a front view which shows typically the principal part of the switchgear, and shows the state which the brake mechanism was cancelled | released and the opening / closing body closed. It is a front view which shows typically the principal part of the switchgear, and shows the state which the brake mechanism act | operated by the opening-and-closing body contacting the obstruction. It is a principal part perspective view which shows the other examples of the switchgear concerning this invention. It is principal part sectional drawing of the switchgear, (a) shows the state in which the opening / closing body is closing, (b) shows the state which the opening / closing body contacted the obstacle. It is a front view which shows typically the principal part of the switchgear, (a) shows the state in which the opening-and-closing body is closing operation, (b) is the opening-and-closing body contacting an obstacle, and an engagement rotation member is The rotated state is shown. It is a perspective view which shows an example of a rocking | swiveling member. It is a principal part perspective view which shows the other examples of the switchgear concerning this invention. It is principal part sectional drawing of the switchgear, (a) shows the state in which the opening / closing body is closing, (b) shows the state which the opening / closing body contacted the obstacle. It is a front view which shows typically the principal part of the switchgear, (a) shows the state in which the opening-and-closing body is closing operation, (b) is the opening-and-closing body contacting an obstacle, and an engagement rotation member is The state rotated halfway is shown. (C) shows the state in which the engaging rotation member has fully rotated. It is a perspective view which shows an example of an engagement rotation member. It is a principal part perspective view which shows the other examples of the switchgear concerning this invention. It is principal part sectional drawing of the switchgear, (a) shows the state in which the opening / closing body is closing, (b) shows the state which the opening / closing body contacted the obstacle. It is a front view which shows typically the principal part of the switchgear, (a) shows the state in which the opening-and-closing body is closing operation, (b) is the opening-and-closing body contacting an obstacle, and an engagement rotation member is The rotated state is shown. FIG. 7 is a front view of a main part schematically showing another example of the opening / closing device according to the present invention, in which (a) shows a state in which the opening / closing body is in a closing operation, and (b) shows that the opening / closing body is in contact with an obstacle. The state which the joint rotation member rotated is shown.

  In one embodiment for carrying out the present invention, an opening / closing body main body that can be closed downward while sliding, and a movable body that is connected to a lower end portion of the opening / closing body main body and is movable upward relative to the opening / closing body main body. A seat plate, a brake mechanism capable of braking the closing operation of the opening / closing body main body, a winding body rotatably supported by the opening / closing body main body and biased in the winding direction, and the winding body And an engagement portion provided so as to brake the rotation of the winding body, and one end side is wound around the winding body and the brake mechanism is braked by tension on the other end side. A string-like member, and the engaging portion is engaged with the winding body by raising the movable seat plate facing the opening / closing body main body to generate the tension on the string-like member.

Furthermore, in order to improve the interlocking between the movable seat plate and the engaging portion and to improve the operability of the engaging portion, the lower end side of the opening / closing body is pressed from below by the movable seat plate and The swing member is supported so as to swing to the position, and the engaging portion is engaged with the winding body by swinging the swing member.
Here, the engaging portion may be provided integrally with the swinging member, or may be supported separately from the swinging member and engaged with the winding body by raising the movable member. Also good.

  Further, in order to operate the engaging portion without deviation across the opening / closing body width direction, more preferably, a lower end of the opening / closing body main body is provided with a recess opening continuously downward in the opening / closing body width direction, In this recess, the swinging member is provided in a long shape extending in the opening / closing body width direction with its swinging fulcrum supported on one end side in the opening / closing body thickness direction, and the lower end side of the recess The movable seat plate is provided in a long shape extending in the opening / closing body width direction and engaged so as to slide in the vertical direction.

  Furthermore, as a preferable aspect of engaging the engaging portion with the winding body, the engaging portion is slidably contacted with the winding body to brake the winding body.

  Moreover, as another preferable aspect which engages the said engaging part with the said winding body, the said engaging part is fitted to the said winding body in uneven | corrugated shape, and the said winding body is braked.

  Furthermore, as a preferable aspect for improving the concavo-convex fit between the engagement portion and the winding body, the winding portion has a concave portion and / or a convex portion that are fitted to the engagement portion on the outer peripheral portion. An engaged rotating body provided coaxially and integrally with the handle, and an engaging rotating member that is rotatably supported by the opening / closing body main body and has the engaging portion around the rotation center portion thereof With.

  In particular, as a preferable aspect from the viewpoint of fitting the engaging portion to the engaged rotating body relatively strongly, the engaging rotation member rotates the engaged rotation that rotates as the winding body rotates. It is provided so as to be fitted in the engaged rotating body by rotating in the opposite direction to the rotating direction of the body.

  In addition, from the viewpoint of facilitating the release of the engagement after the engagement portion is fitted to the engaged rotating body, the engagement rotating member is preferably a rotation of the winding body. Rotating in the same direction with respect to the rotation direction of the engaged rotating body that rotates with the rotation, and fitted to the engaged rotating body.

  Furthermore, in order to improve the operation when fitting the engaging portion to the engaged rotating body, preferably, on the opposite side of the engaging portion across the rotation center portion of the engagement rotating member, A pressure receiving portion that receives the ascending force of the movable seat plate is provided, and the pressure receiving portion brings its pressure receiving position closer to the rotation center portion as the engaging rotation member rotates due to the ascent of the movable seat plate. To form.

  Further, as a preferable aspect for braking the engaged rotor more strongly, an auxiliary rotor that engages with an outer peripheral portion of the engaged rotor and synchronously rotates is provided, and the winding body includes A string-like member is provided so as to be extended upward from the auxiliary rotating body side, and the engaging rotating member rotates between the auxiliary rotating body and the engaged rotating body when the movable rotating plate rotates. In the lower valley portion in between, the engaging portion is provided so as to fit both of the rotating bodies.

In the present specification, the “opening / closing body thickness direction” means the thickness direction of the opening / closing body in the closed state.
Further, in this specification, the “opening / closing body width direction” means a direction that is substantially orthogonal to the opening / closing direction of the opening / closing body and not the thickness direction of the opening / closing body.
Further, in this specification, the “opening / closing body opening / closing direction” means a direction in which the opening / closing body slides in order to partition or open the space.

Hereinafter, a preferred specific example of the above embodiment will be described in detail with reference to the drawings.
The opening / closing device described below is disposed in or inside an opening of a housing such as a house, building, warehouse, factory, underground shopping center, tunnel, or vehicle loading platform, and opens and closes the opening or partitions the space inside the housing. It is applicable as a shutter device that opens or closes, and as a particularly preferred embodiment, it is an example applied to a fire prevention shutter device that is automatically closed in the event of an emergency such as a fire to prevent the spread of flames and smoke.

  The opening / closing device 1 includes an opening / closing body 10 capable of closing its own weight by sliding an end portion in the closing direction, and a guide rail 20 that surrounds and guides the end portion of the opening / closing body 10 in the width direction (left-right direction in FIG. 1). And a winding device 30 for winding and unwinding the opening / closing body 10, and when the opening / closing body 10 during the closing operation comes into contact with the obstacle X, the closing operation of the opening / closing body 10 is performed by a mechanical operating mechanism. Stop.

  The opening / closing body 10 constitutes the opening / closing body main body 11 by connecting a plurality of so-called slats 11a formed by bending a horizontally-long substantially rectangular metal plate so as to rotate between the vertically adjacent slats 11a, 11a. The movable seat plate 12 is connected to the lower end of the opening / closing body main body 11.

  On the lower end side of the opening / closing body main body 11, there is provided a recess 11b that continuously opens in the opening / closing body width direction (see FIGS. 4 and 5). And in this recessed part 11b, the said rocking | swiveling member 13 is provided in the elongate shape over the opening-and-closing body width direction in the state which supported the rocking | fluctuation fulcrum part at the one end side of the opening-and-closing body thickness direction, At the lower end side of 11b, the movable seat plate 12 is provided in a long shape extending in the opening / closing body width direction and engaged so as to slide in the vertical direction.

The swing member 13 is rotatably supported on the inner wall of the opening / closing body main body 11 so as to be pressed by the movable seat plate 12 to swing in the opening / closing body opening direction and to swing in the opening / closing body closing direction by its own weight. (See FIG. 5).
The swing member 13 is preferably provided over substantially the entire length in the opening / closing body width direction so as to contact the movable seat plate 12 at any position in the opening / closing body width direction.
If the shape of the swing member 13 is described in detail, the pressed piece portion 13a on the swing end portion side and the pressed curved surface portion 13b positioned slightly on the swing center side from the pressed piece portion 13a. And have. One or both of the pressed piece portion 13a and the pressed curved surface portion 13b abut against the movable seat plate 12 that moves up and down.

On the upper surface side of the pressed piece portion 13a of the swing member 13, a friction member 14 (engagement portion) that slides on a winding body 15 to be described later and brakes the winding body 15 is provided. The friction member 14 is made of a material having high frictional resistance and good wear resistance.
The friction member 14 (engagement portion) is in sliding contact with the outermost peripheral portion of the winding body 15 due to the swinging of the swinging member 13 accompanying the rising of the movable seat plate 12, and the swinging member accompanying the lowering of the movable seat plate 12. 13 is removed from the winding body 15 by the reverse swing of 13.
As shown in FIGS. 6 and 7, the dimension of the friction member 14 in the opening / closing body width direction is shorter than the outer diameter of the winding body 15 and is pressed against the lower end side portion of the winding body 15. Is set as appropriate.
Further, the protruding end surface of the friction member 14 is formed in a curved shape in a longitudinal section so as to have good contact with the outer peripheral portion of the winding body 15 (see FIG. 5).

The movable seat plate 12 is a member that extends over substantially the entire length in the opening / closing body width direction, and protrudes downward from the lower end of the opening / closing body body 11. The movable seat plate 12 moves freely by a predetermined amount in the vertical direction relative to the opening / closing body main body 11.
The movable seat plate 12 of the illustrated example is formed in a substantially inverted T-shaped longitudinal section, and the upper end portion of the movable seat plate 12 is engaged in the recess 11b of the opening / closing body main body 11 so as to be vertically slidable.

A winding body 15 is provided on the outer surface of the concave portion 11b on the lower end side of the opening / closing body main body 11 having the above configuration.
If it demonstrates in detail, the notch part 11b1 (refer FIG. 4) connected to the exterior will be provided in the upper part side of the said recessed part 11b, and the part near one end of the opening / closing body thickness direction. The winding body 15 is disposed so that its lower portion is inserted into the cutout portion 11b1, and is rotatably supported by a cover member 16 that covers the periphery thereof.

As shown in FIG. 5, the winding body 15 includes a substantially cylindrical winding cylinder portion 15a for winding and unwinding the string-like member a, and one axial end and the other end of the winding cylindrical portion 15a. Frame portions 15b and 15b fixed to the main body, and a winding spring (not shown) for urging the winding tube portion 15a and the frame portions 15b and 15b in the winding direction.
The spring is preferably built in the winding body 15 so as not to be exposed to the outside and interfere with the opening / closing body main body 11 or the like.
If it demonstrates in detail, the frame part 15b will be a substantially disk-shaped member with an outer diameter larger than the winding cylinder part 15a. Of the two frame portions 15b, 15b arranged at intervals in the opening / closing body thickness direction, the protruding end of the friction member 14 comes into sliding contact with the lowermost end portion of the frame portion 15b closer to the surface of the opening / closing body body 11. ing.

The cover member 16 is a box-shaped member that covers the front, rear, left, right, and top of the winding body 15, and is fastened to the upper and outer surfaces of the recess 11 b in the opening / closing body main body 11 and is drawn out from the winding body 15. The member a is inserted upward.
In the example shown in FIG. 4, the wall portion on the front side of the cover member 16 is omitted in order to clarify the internal structure. Also in FIGS. 5 to 7, the entire cover member 16 is omitted in order to clarify the internal structure.
The cover member 16 is detachably fixed to the opening / closing body main body 11 by means such as screwing, so that the maintainability of the winding body 15 and the like is improved.

  The guide rail 20 is a member having a substantially U-shaped cross section that surrounds the widthwise end of the opening / closing body 10, and a seating target site P (for example, a floor surface, the ground, a frame member, etc.) seated by the opening / closing body 10. ) And the winding device 30 (see FIG. 1).

  In addition, the winding device 30 includes a winding shaft 32 that winds and unwinds the opening / closing body 10 in a storage case 31 in which an opening for allowing the opening / closing body 10 to appear and retract on the lower side, and the winding shaft. An opening / closing device 40 that rotates and brakes 32 via a power transmission means 33 such as a chain and a sprocket, and an automatic closing device 50 that causes the opening / closing body 10 to be closed by its own weight by releasing the braking operation of the opening / closing device 40. (See FIG. 1).

The switch 40 is formed by providing an exposed operation body 44 in a switch having a known structure disclosed in, for example, Japanese Utility Model Laid-Open No. 01-118084. FIG. 2 is a cross-sectional view of a main part of the opening / closing device 40 and an internal structure diagram of the automatic closing device 50.
More specifically, the opening / closing machine 40 is rotated by the motor unit 41 on one end side (right end side in the illustrated example) of the motor unit 41 as a power source of the winding shaft 32. A brake mechanism 42 for braking is provided in the casing 43.

The motor unit 41 is a direct current motor or an alternating current motor, and transmits the rotational force of the drive shaft 41b integral with the rotor 41a to the take-up shaft 32 via the power transmission means 33 (see FIG. 1).
As another example, when it is used only by its own weight or manual opening / closing, a brake mechanism 42 (and a manual driving mechanism or the like) that omits the motor unit 41 from the opening / closing machine 40 and brakes the rotation of the drive shaft 41b. It is good also as a structure mainly made up of.

  When the operating body 44 is pushed in one direction (rightward according to FIG. 2) against the biasing force of the biasing member 42c (coil spring according to the illustrated example), the brake mechanism 42 is The braking state is such that the drive shaft 41b is non-rotatably restricted, and the release state is such that the drive shaft 41b is freely released. FIG. 2 shows a braking state.

  Further, the automatic closing device 50 has a forward position (position shown in FIG. 3B) in which the operating body 44 is pushed in a casing 51 fixed to the opening / closing device 40 and a return position (backward to the original initial state). 3) (a position shown in FIG. 3 (a)), an advancing / retracting member 52 that can advance and retreat, an urging member 53 that urges the advancing / retreating member 52 in the forward direction, and the advancing / retreating member 52 when retracted And an engagement / disengagement device 54 that releases the engagement state in response to a closing command, and a manual return member 55 that manually returns the advance / retreat member 52 to the return position.

The advancing / retracting member 52 is a member that is supported so as to slide back and forth in the casing 51, and has a front end protruding in the direction of the operating body 44 outside the casing 51. The advance / retreat member 52 is disposed so as to have a gap s between the operating body 44 of the brake mechanism 42 when the advance / retreat member 52 is in the return position (see FIG. 3A). The gap s prevents the advancement / retraction member 52 that has advanced from being pushed by the operating body 44 and returned to the return position and locked.
Further, a manual return member 55 and a string member a for operation which will be described later are connected to the rear end side of the advance / retreat member 52.

Further, the urging member 53 is a tension spring according to the illustrated example, but may be replaced with a compression spring that presses the advance / retreat member 52 from the rear side (left side according to FIG. 3).
The engagement / disengagement device 54 engages the plunger 54a urged by the urging force of an internal urging member (not shown) with the advance / retreat member 52, and retracts the plunger 54a by the electromagnetic force of the electromagnetic solenoid to advance / retreat. This is a device for releasing the locking of the member 52.
The manual return member 55 is a member (for example, a string-like body or a rod-like body) that is connected to the rear end side of the advance / retreat member 52 and projects rearward of the casing 51, and manually moves the advance / retreat member 52 at the forward position to the return position. Used to return.

According to the automatic closing device 50 configured as described above, when an electrical closing command (disaster prevention signal or the like) is received at the initial position (return position) shown in FIG. As shown in FIG. 3B, the locked state by the engagement / disengagement device 54 is released, and the advance / retreat member 52 moves forward by the urging force of the urging member 53 and becomes the advance position where the operation body 44 is pressed. .
Further, when the manual return member 55 is pulled rearward (leftward according to FIG. 3) by the manual operation at the forward position, the return position (FIG. 3) where the advance / retreat member 52 is locked by the engagement / disengagement device 54. Return to 3 (a)).

  The engagement / disengagement device 54 moves the advance / retreat member 52 forward in accordance with the closing command to operate the operation body 44, and the advance / retreat member 52 is pulled back to retract to return the operation body 44 to the original state. Other configurations may be used as long as the mechanism is the same.

  A string-like member a is provided on the rear end side of the advance / retreat member 52 in the automatic closing device 50 so as to pull the advance / retreat member 52 rearward when tension is generated.

The string-like member a is for raising the tension by the upward movement of the movable seat plate 12 and for braking the brake mechanism 42 by the tension.
According to a preferred example of the present embodiment, the string member a is a metal wire formed by bringing a number of metal wires close to each other. The string-like member a may be a long and flexible member. As another example, the string-like member a may be a band-like object, a chain-like object, a string, or the like. Furthermore, as another example of the string-like member a, it is possible to adopt a configuration in which an electrically conductive material is used and also functions as an electric wire.

One end side of the string-like member a is extended upward, and is further extended in the horizontal direction by the pulley member 34 in the storage case 31, and its tip is fixed to the advance / retreat member 52 of the automatic closing device 50. The
Further, the other end side of the string-like member a extends downward, and is fixed to the outer peripheral surface of the winding tube portion 15a in the winding body 15 on the lower end side of the opening / closing body main body 11.

Next, the characteristic operation and effect of the switchgear 1 having the above-described configuration will be described in detail.
First, in a normal state without a disaster prevention signal, as shown in FIG. 3A, the brake mechanism 42 is maintained in a braking state by an urging force of a coil spring 42c (see FIG. 2), and the opening / closing body 10 is stationary in a fully open state. doing.

When the opening / closing device 1 in the fully open state receives a disaster prevention signal, the engagement / disengagement device 54 of the automatic closing device 50 is excited by an electrical signal from a control unit (not shown), and the locked state of the advance / retreat member 52 is released. (See FIG. 3B and FIG. 6).
Then, the advancing / retreating member 52 of the automatic closing device 50 moves forward by the urging force of the urging member 53, swings the operating body 44, and brakes the brake mechanism 42 of the opening / closing machine 40 (shown in FIG. 3A). The state is changed to the release state (the state shown in FIG. 3B).

Therefore, the drive shaft 41b is in a freely rotatable state inside the switch 40.
For this reason, the take-up shaft 32 interlocked with the drive shaft 41b via the power transmission means 33 is also in a freely rotatable state.
Therefore, the opening / closing body 10 wound around the winding shaft 32 and in the fully opened state is drawn out from the winding shaft 32 by its own weight and performs a closing operation. During this closing operation, the string member a is the lower end of the opening / closing body main body 11. It is drawn out from the winding body 15 on the side.
The closing operation due to the weight of the opening / closing body 10 is adjusted by a speed control device (not shown) provided in the opening / closing machine 40 so as not to exceed a predetermined speed.

  During the closing operation, as shown in FIGS. 5B and 7, when the movable seat plate 12 comes into contact with the obstacle X, the movable seat plate 12 is opposed to the opening / closing body main body 11. To rise. Then, the swing end side of the swing member 13 is pressed by the movable seat plate 12 and swings upward, and the friction member 14 (engagement portion) on the swing end side slides on the outermost peripheral portion of the winding body 15. In contact therewith, the winding rotation of the winding body 15 is stopped or suppressed.

Therefore, the weight of the opening / closing body 11 is added to the string-like member a, and the string-like member a is pulled downward. More specifically, in this state, when the obstacle X is pushed by the opening / closing body 10 and slightly contracts downward, the opening / closing body main body 11 and the movable seat plate 12 slightly move downward, and the string The shaped member a is pulled downward.
The downward pulling force is converted into a substantially horizontal pulling force by the pulley member 34 on the upper side of the opening / closing body 10, and the advancing / retracting member 52 is pulled back. Therefore, the operating body 44 of the brake mechanism 42 swings in the braking operation direction (the left direction in FIGS. 3 and 7) by the urging force of the urging member 42 c in the opening / closing device 40.

  Therefore, in the opening / closing machine 40, the rotation of the drive shaft 41b is braked by the brake mechanism 42, the rotation of the winding shaft 32 interlocked with the drive shaft 41b is stopped, and the closing operation of the opening / closing body 10 is also stopped.

When the obstacle X is removed from below the opening / closing body 10, the movable seat plate 12 moves downward relative to the opening / closing body main body 11 by its own weight.
Therefore, the swinging member 13 and the friction member 14 (engagement portion) at the lower end of the opening / closing body 11 swing downward, the restrained state with respect to the winding body 15 is released, and the string-like member a is drawn out from the winding body 15. It is. That is, the state shown in FIGS. 5B and 7 returns to the state shown in FIGS.

Accordingly, the weight of the opening / closing body 11 hardly acts on the string member a, the string member a relaxes (in other words, the tension of the string member a decreases), and the advance / retreat member 52 is attached again. It moves forward by the urging force of the urging member 53 and pushes the operating body 44 of the brake mechanism 42 (see FIGS. 3A, 3B and 6).
Therefore, the brake mechanism 42 is again released from the braking state, and the closing operation of the opening / closing body 10 is automatically restarted.

  In another preferred embodiment, a damper is provided in the middle of the string-like member a or in the automatic closing device 50, and by the action of the damper, the advancing / retracting member 52 is moved forward with a delay from the time of relaxation of the string-like member a, and opened / closed. The automatic closing of the body 10 may be resumed. According to this aspect, since the opening / closing body 10 performs a closing operation for a while after the obstacle X is removed, the opening / closing body 10 can be prevented from coming into contact with the obstacle X again.

  Further, although means for returning the automatic closing device 50 to the initial state (the state shown in FIG. 3A) is omitted, the advance / retreat member 52 is retracted manually or electrically to be engaged with the plunger 54a. You can do it.

  Next, another aspect is shown about the switchgear concerning this invention. In addition, since the aspect shown below is what changed the structure of the switchgear demonstrated previously, it mainly explained only the changed part in detail, and about the structure substantially the same as the switchgear demonstrated previously. The same reference numerals are used, and repeated detailed description is omitted.

  The opening / closing device 2 shown in FIGS. 8 to 10 is different from the opening / closing device 1 in that the friction member 14 is omitted, the engaged rotating body 17, the pressing member 18 (see FIG. 9), and the engaging rotation member 62. Etc. are added. Although not shown, a cover member similar to the cover member 16 described above is provided around the winding body 15 and the engaged rotating body 17.

  The engaged rotating body 17 is a disk-shaped member that is disposed on one end side in the axial direction of the winding body 15 and is provided coaxially and integrally with the winding body 15. It is formed in a substantially gear shape that can be fitted into the engaging portion 62a of the joint rotation member 62 in an uneven shape.

The pressing member 18 is fixed to the upper surface side of the pressed piece 13a on the distal end side of the swinging member 13 (see FIG. 9).
According to the illustrated example, the pressing member 18 is a member having a substantially V-shaped longitudinal section, and is a long length extending in the opening / closing body width direction so as to press the swing end side of the engaging rotation member 62 from below. It is formed in a shape.
As another example, the pressing member 18 may be omitted, and the engaging rotation member 62 may be pressed directly by the distal end side of the swinging member 13.

According to the illustrated example, the engaging rotation member 62 is formed in a horizontally long piece shape, and has a rotation center portion 62b that is rotatably supported in the recess 11b on the lower end side of the opening / closing body main body 11 at one end thereof. In addition, an engaging portion 62a that engages with the outer peripheral portion of the engaged rotating body 17 is provided at a position on the other end side and around the rotation center portion 62b (see FIG. 10).
The engaging part 62a is a plurality of upward projections (two in the illustrated example) formed so as to engage with the recesses on the outer periphery of the engaged rotating body 17, It is provided so as to mesh from a direction substantially perpendicular to the tangent.
This engaging rotation member 62 is in a direction opposite to the rotation direction (clockwise according to FIG. 10) of the engaged rotating body 17 that rotates as the winding body 15 rotates (counterclockwise according to FIG. 10). ) And is arranged so as to fit into the engaged rotating body 17.
Further, the engagement rotation member 62 will be described in detail with respect to the example shown in FIG. 10. By disposing the engagement portion 62 a immediately below the engaged rotation body 17, the engagement rotation body 17. The release property when coming off from is improved.

  Therefore, according to the opening / closing device 2 shown in FIGS. 8 to 10, in a state where the brake mechanism 42 is released by the operation of the automatic closing device 50, the opening / closing body 10 is closed downward by its own weight. During this closing operation, as shown in FIGS. 9 (a) and 10 (a), the movable seat 12 is in a position that is lowered relative to the opening / closing body 11, and the swing member 13 and the pressing member 18 are also lowered. The engaging portion 62 a of the engaging rotation member 62 is in a state of being separated from the engaged rotating body 17. Therefore, the winding body 15 keeps feeding the string-like member a.

  During the closing operation, as shown in FIGS. 9 (b) and 10 (b), when the movable seat plate 12 comes into contact with the obstacle X, the movable seat plate 12 faces the opening / closing body main body 11. Rise. Then, the swinging end side of the swinging member 13 is pressed by the movable seat plate 12 and swings upward, and the pressing member 18 on the swinging end side presses and rotates the engaging rotating member 62 to rotate the engaging rotation. Since the engaging portion 62a on the distal end side of the moving member 62 meshes with the outer peripheral portion of the engaged rotating body 17, the drawing-out rotation of the winding body 15 is stopped.

Therefore, the weight of the opening / closing body main body 11 is added to the string-like member a, the advance / retreat member 52 of the automatic closing device 50 is retracted by the tension of the string-like member a, and the operating body 44 of the brake mechanism 42 is moved in the braking operation direction (in FIG. Swing to the left.
Therefore, in the opening / closing machine 40, the rotation of the drive shaft 41b is braked by the brake mechanism 42, the rotation of the winding shaft 32 interlocked with the drive shaft 41b is stopped, and the closing operation of the opening / closing body 10 is also stopped.

When the obstacle X is removed from below the opening / closing body 10, the movable seat plate 12 moves downward relative to the opening / closing body main body 11 by its own weight.
Therefore, the swinging member 13 and the pressing member 18 at the lower end of the opening / closing body 11 swing downward, and accordingly, the engaging rotating member 62 rotates so as to be detached from the engaged rotating body 17, The restraint state with respect to the body 15 is released, and the string-like member a is fed out from the winding body 15. That is, the state shown in FIGS. 9B and 10B returns to the state shown in FIGS. 9A and 10A.
Therefore, the brake mechanism 42 is again released from the braking state, and the closing operation of the opening / closing body 10 is automatically restarted.

As a modification of the opening / closing device 2 described above, the engaging rotation member 62, the pressing member 18, and the swing member 13 are replaced with a swing member 13 'shown in FIG. 13 'may be directly engaged with and disengaged from the engaged rotating body 17.
The oscillating member 13 ′ has one or more (three in the illustrated example) recesses that can mesh with the protrusions on the outer periphery of the engaged rotating body 17 on the upper surface of the pressed piece 13 a on the distal end side of the oscillating member 13. 13a1 (or a through hole) is formed.

Next, the opening / closing device 3 whose main parts are shown in FIGS.
The opening / closing device 3 has a configuration in which the engaging rotating member 62 is replaced with an engaging rotating member 63 with respect to the opening / closing device 2.

The engagement rotation member 63 has a rotation center portion 63a that is rotatably supported in the recess 11b on the lower end side of the opening / closing body main body 11. The engagement rotation member 63 is engaged on one end side around the rotation center portion 63a. It has the engaging part 63b which engages with the outer peripheral part of the rotary body 17 (refer FIG. 16).
The engaging portion 63b is composed of a plurality of (two in the illustrated example) upward first and second protrusions 63b1 and 63b2 formed so as to engage with the recesses on the outer periphery of the engaged rotating body 17. The first protrusion 63b1 is a protrusion that first engages with the outer peripheral portion of the engaged rotating body 17, protrudes slightly larger than the second protrusion 63b2, and has a larger width.
The engaging rotation member 63 rotates in the same direction with respect to the rotation direction (clockwise according to FIG. 14) of the engaged rotating body 17 that rotates as the winding body 15 rotates. The protrusions 63b1 and the second protrusions 63b2 are arranged so as to be fitted to the engaged rotating body 17, and more specifically, as shown in FIG. And it arrange | positions near the feeding part of the string-like member a.

Further, the ascending force of the movable seat plate 12 is received via the swinging member 13 and the pressing member 18 on the opposite side of the engaging portion 63b across the turning center portion 63a of the engaging turning member 63. First and second pressure receiving portions 63c and 63d are provided (see FIG. 16). The first and second pressure receiving portions 63c and 63d are formed so that the pressure receiving position is brought closer to the rotation center portion 63a as the engaging rotation member 63 is rotated by raising the movable seat plate 12. ing.
More specifically, the first pressure receiving portion 63c is formed in a protruding shape protruding downward on the most reverse end side of the engaging portion 63b across the rotation center portion 63a, and when the ascended It first contacts the pressing member 18.
The second pressure receiving portion 63d is disposed on the opposite end side of the engaging portion 63b across the rotation center portion 63a and closer to the rotation center portion 63a than the first pressure receiving portion 63c. It slightly protrudes downward and comes into contact with the pressing member 18 after the first pressure receiving portion 63c.

  The characteristic operation and effect of the opening / closing device 3 having the above-described configuration will be described. When the weight of the opening / closing body 10 is lowered (see FIGS. 13A and 14A), the movable seat 12 becomes an obstacle X. In the case of contact, the movable seat plate 12 rises relative to the opening / closing body main body 11 (see FIGS. 13B and 14B). Then, the swinging end side of the swinging member 13 is pressed by the movable seat plate 12 and swings upward, and the pressing member 18 on the swinging end side presses and rotates the engagement rotating member 63.

  First, the engaging rotation member 63 starts to rotate slowly with a relatively high torque by being pushed by the first pressure receiving portion 63c far from the rotation center portion 63a as an action point, and the engaged rotating body The first protrusion 63b1 closer to 17 meshes with the concave portion on the outer periphery of the engaged rotating body 17 (see FIG. 14B).

Next, when the second pressure receiving portion 63d is pressed from the pressing member 18, the engaging rotation member 63 rotates at a high speed with a relatively low torque, and the second protrusion 63b2 is moved to the engaged rotating body. 17 is engaged with a concave portion on the outer periphery, and the engaged rotating body 17 and the winding body 15 are slightly rotated in the winding direction (counterclockwise direction in the drawing) (see FIG. 15C).
In this state, the rotation of the winding body 15 and the engaged rotating body 17 is substantially constrained. Therefore, tension is generated in the string-like member a due to the slight rotation of the engaged rotating body 17 in the winding direction and the weight of the opening / closing body main body 11, and the braking mechanism 42 is in a braking state by this tension. Thus, the closing operation of the opening / closing body 10 is stopped.

  Thus, according to the above configuration, the engaging rotation member 63 and the engaged rotating body 17 can be engaged deeply stepwise, and the engaged rotating body 17 and the engaged rotating body 17 and Since the winding body 15 is slightly rotated in the winding direction, it is easy to ensure a relatively large tension of the string-like member a.

When the obstacle X is removed from below the opening / closing body 10, the movable seat plate 12 moves downward relative to the opening / closing body main body 11 by its own weight, so that the swing member 13 and the pressing member 18 are moved downward. Accordingly, the engagement portion 63b of the engagement rotation member 63 is rotated in the reverse direction so as to be disengaged from the engaged rotation body 17, so that the restrained state with respect to the winding body 15 is released, and the winding The string-like member a is fed out from the body 15. That is, the state shown in FIGS. 13B and 15C returns to the state shown in FIGS. 13A and 14A.
Therefore, the brake mechanism 42 is again released from the braking state, and the closing operation of the opening / closing body 10 is automatically restarted.

  As described above, the movement in which the engaging rotation member 63 is disengaged from the engaged rotating body 17 is such that the rotation direction of the engaging rotating member 63 is opposite to the rotation direction of the engaged rotating body 17. Since the engagement portion 63b of the engagement rotation member 63 is rotated so as to be repelled by the engaged rotation body 17, this is easily performed as compared with the opening / closing device 2 described above.

  Therefore, according to the opening / closing device 3 shown in FIGS. 12 to 16, it is possible to ensure a relatively large braking force when the engaging portion 63 b of the engaging rotating member 63 is engaged with the engaged rotating body 17. The releasability when the engaging part 63b is disengaged from the engaged rotating body 17 can be obtained well, and the engaging rotation member 63 is too bitten by the engaged rotating body 17 and is not released. Can be prevented.

Next, the opening / closing device 4 whose main parts are shown in FIGS.
The opening / closing device 4 has a configuration in which an auxiliary rotating body 19 is added to the opening / closing device 2 (see FIG. 8), and the engagement rotation member 62 is replaced with an engagement rotation member 64.

The auxiliary rotator 19 is provided so as to engage with the outer peripheral portion of the engaged rotator 17 and rotate synchronously.
The auxiliary rotating body 19 is a gear-shaped disk having substantially the same diameter as the engaged rotating body 17 in more detail with respect to the illustrated example. The auxiliary rotating body 19 has an opening / closing body in parallel with the engaged rotating body 17 and the rotation axis. It arrange | positions so that it may be located in a line with the width direction, and it has meshed | engaged with the outer peripheral part of the to-be-engaged rotary body 17. FIG.

  In the opening / closing device 4, the winding body 15 is disposed so as to feed the string-like member a upward from the auxiliary rotating body side. A spring (not shown) for urging the winding body 15 in the winding direction is incorporated in the winding body 15 so as not to be exposed to the outside and interfere with the opening / closing body main body 11 and the like. .

Further, when the engaging rotation member 64 is rotated upward by the rising of the movable seat plate 12, these rotations are performed in the lower valley portion between the auxiliary rotating body 19 and the engaged rotating body 17. The first and second engaging portions 64a and 64b are provided so as to fit both the bodies 19 and 17.
If it demonstrates in detail, according to the example of illustration, this engagement rotation member 64 will be formed in a horizontally long piece shape, and it will be rotatably supported in the recessed part 11b of the opening-and-closing body main body 11 lower end side at the one end side. There is a rotation center portion 64c, and a first engagement portion 64a that can mesh with the outer peripheral portion of the auxiliary rotator 19 is provided at the upper portion on the other end side. The first engagement portion 64a can rotate more than the first engagement portion 64a. A second engaging portion 64b that can mesh with the outer peripheral portion of the engaged rotating body 17 is provided at the upper portion on the moving center portion 64c side (see FIG. 19).

The first engaging portion 64 a is a plurality of upward projections (three according to the illustrated example) formed so as to engage with the recesses on the outer periphery of the auxiliary rotating body 19. On the other hand, it is provided so as to engage with the engaged rotating body 17.
The second engaging portion 64b is a single or a plurality of upward projections (single in the illustrated example) formed so as to engage with the recesses on the outer periphery of the engaged rotating body 17, and the outer periphery of the engaged rotating body 17 is It is provided so that it may mesh | engage from the auxiliary | assistant rotary body 19 side with respect to the lower side part.

The characteristic operation and effect of the opening / closing device 4 having the above-described configuration will be described. When the weight of the opening / closing body 10 is lowered, the winding body 15 rotates while feeding the string-like member a and is integrated with the winding body 15. The auxiliary rotating body 19 rotates in the reverse direction while meshing with the engaged rotating body 17.
When the lower end of the opening / closing body 10 comes into contact with the obstacle X, the movable seat plate 12 rises relative to the opening / closing body main body 11, and the swinging end side of the swinging member 13 is pressed by the movable seat plate 12 to move upward. The pressing member 18 on the swinging end side pushes the engagement rotating member 64 to rotate upward (see FIG. 19).

  Therefore, the engaging rotation member 64 meshes the first engaging portion 64 a with the outer peripheral portion of the auxiliary rotating body 19 and meshes the second engaging portion 64 b with the engaged rotating body 17. At this time, the engaging rotation member 64 is sandwiched between lower trough portions between the auxiliary rotating body 19 and the engaged rotating body 17, and firmly attached to the auxiliary rotating body 19 and the engaged rotating body 17. Engage.

When the obstacle X is removed from below the opening / closing body 10, the movable seat plate 12 moves downward relative to the opening / closing body main body 11 by its own weight, so that the swing member 13 and the pressing member 18 are moved downward. Accordingly, the engaging rotation member 64 is rotated in the reverse direction so as to be detached from the auxiliary rotating body 19 and the engaged rotating body 17, and the restrained state with respect to the winding body 15 is released. The string-like member a is fed out from the body 15. That is, the state shown in FIGS. 18B and 19B returns to the state shown in FIGS. 18A and 19A.
Therefore, the brake mechanism 42 is again released from the braking state, and the closing operation of the opening / closing body 10 is automatically restarted.

Next, the opening / closing device 5 whose main part is shown in FIG. 20 will be described.
The opening / closing device 5 is different from the opening / closing device 4 (see FIG. 19) in that the auxiliary rotating body 19 is replaced with a winding body 15 and a to-be-engaged rotating body 17, and a winding body 15 'and a to-be-engaging rotating body that are symmetrical to each other. The configuration is replaced with 17 ′.

The winding body 15 ′ and the engaged rotating body 17 ′ are arranged symmetrically so that the winding body 15 and the engaged rotating body 17 and the rotating shaft are parallel to each other and aligned in the opening / closing body width direction. The outer peripheral portion of the combined rotating body 17 ′ is meshed with the outer peripheral portion of the engaged rotating body 17.
Therefore, the string-like member a of the winding body 15 and the string-like member a ′ of the winding body 15 ′ are fed upward from the side between the winding bodies 15 and 15 ′.
Both of these string-like members a and a ′ are connected so as to join in the storage case 31, and are fastened to the advance / retreat member 52 of the automatic closing device 50.

Therefore, according to the opening / closing device 5 whose main part is shown in FIG. 20, when the opening / closing body 10 under its own weight is lowered against the obstacle X, the engaging rotation member is substantially the same as the opening / closing device 4 described above. 64 can be firmly engaged with the lower valley portion between the two engaged rotating bodies 17 and 17 ′ to restrain the two winding bodies 15 and 15 ′. , A ′ can pull the advance / retreat member 52 of the automatic closing device 50 and operate the brake mechanism 42 to stop the weight drop of the opening / closing body 10.
Further, when the obstacle X is removed, the self-weight effect of the opening / closing body 10 can be restarted by the reverse operation to the above.

  Moreover, since it has a configuration comprising two string-like members a and a ′, the thickness per string-like member can be made relatively thin, and when one of the string-like members is cut, the other The brake mechanism 42 can be actuated and released by the string-like member.

In the opening / closing device 5, a spring (not shown) for urging the winding bodies 15 and 15 ′ in the winding direction from the viewpoint of sufficiently securing the torque for winding the two string-like members a and a ′. ) Are preferably incorporated in the two winding bodies 15 and 15 ', respectively, but the two winding bodies 15 and 15' are interlocked by the engagement of the two engaged rotating bodies 17 and 17 '. Therefore, it is possible to adopt a configuration in which the mainspring is built in only one of the winding bodies 15 (or 15 ′).
Further, as another example, a configuration in which the engaged rotating body 17 and the engaged rotating body 17 ′ are separated so as not to be engaged (that is, the winding body 15 and the winding body 15 ′ rotate independently of each other). In this case, the mainspring is built in each of the winding bodies 15 and 15 ′.

  Further, as a modification of the opening / closing device 5 (see FIG. 20), one of the string-like member a and the string-like member a 'may be loosened and only the other one may be used at all times. According to this configuration, in the normal state, only the other string-like member is used, and when the string-like member is cut, the one string-like member can be used.

Further, according to the above-described embodiment, the opening / closing body 11 is slightly contracted after the lowering opening / closing body 10 abuts against the obstacle X and the movable seat plate 12 relatively rises, and then the obstacle X slightly contracts. The movable seat plate 12 is slightly lowered so that the string-like member a is pulled.
As a preferable aspect in which the obstacle X does not need to be contracted as described above, an elastic portion made of an elastic material (for example, rubber, an elastic resin material, a spring, or the like) is provided on a part or all of the movable seat plate 12. You may make it provide. As a particularly preferable aspect, the elastic portion is provided on the lower end surface of the movable seat plate.
According to this configuration, after the movable seat plate 12 is relatively lifted by the contact with the obstacle X, the elastic body contracts, so that the opening / closing body 11 is slightly lowered downward, and the string member a Since it is pulled, it is not necessary to contract the obstacle X, and the load applied to the obstacle X can be reduced.

Further, as another example of reducing the load applied to the obstacle X, in the aspect including the engaged rotating body 17 (opening and closing devices 2 to 5), the depth of the uneven portion on the outer periphery of the engaged rotating body 17 is set. First, the engaging rotation member 62 (63 or 64) is shallowly engaged with the concavo-convex portion to lock the engaged rotating body 17 and the winding body 15, and then the movable seat plate. The engagement turning member 62 (63 or 64) may be deeply engaged with the concavo-convex portion as the 12 rises.
According to this alternative example, when the lowering opening / closing body 10 abuts against the obstacle X and the movable seat plate 12 relatively rises, the engaging rotation member 62 (63 or 64) is covered with the rise. The engagement rotating body 17 is bitten shallowly, the engaged rotating body 17 and the winding body 15 are locked, and the feeding of the string-like member a is stopped. Thereafter, as the engaging rotation member 62 (63 or 64) bites into the engaged rotating body 17 deeply, the movable seat plate 12 relatively rises. Therefore, the load applied to the obstacle X from the movable seat plate 12 can be reduced.

  Moreover, in the said embodiment, although the advance / retreat member 52 of the automatic closing device 50 was pulled by the tension | tensile_strength of the string-like member a, the brake mechanism 42 was made into the braking state, but as another example, the string-like member a It is also possible to adopt a configuration in which the brake mechanism 42 is brought into a braking state by pulling the operating body 44 directly by tension.

  The brake mechanism may be a mechanism that brakes the closing operation of the opening / closing body 11 by being operated by the tension of the string-like member a. For example, the brake mechanism is opened / closed by being operated by the tension of the string-like member a. It is also possible to employ a mechanism for engaging and braking the body main body 11, the take-up shaft 32, etc. by engaging a friction member (such as a brake pad) or a locking claw.

  Moreover, according to the said embodiment, although the shutter curtain formed by connecting several slats as an example of the opening / closing body 10 was shown, as another example of this opening / closing body 10, a single or several panel, sheet | seat It is good also as an aspect formed by arrange | positioning a shape thing and a net-like thing in an opening-and-closing direction, or an aspect combining suitably a slat, a panel, a pipe, a sheet-like thing, a net-like thing, etc.

  Further, according to the above-described embodiment, the obstacle X is contact-sensed by the movable seat 12 and the sensed state is transmitted by a mechanical mechanism. However, another type of obstacle sensing means (for example, , Means for sensing the rise of the movable seat plate 12 by a sensing switch in the opening / closing body 10 and electrically transmitting the sense signal; and sensing the rise of the movable seat plate 12 by a sensor in the guide rail. It is also possible to use together a means for electrically transmitting a signal, a means for non-contact sensing an obstacle by a photoelectric sensor or the like.

  Further, according to the above-described embodiment, the opening / closing body 10 is wound or fed out by the upper winding shaft 32. However, as another example, the opening / closing body 10 is accommodated upward without being wound. It is also possible to adopt a mode of extending from above.

  Further, according to the embodiment, the engaged rotating body 17 is configured integrally with the winding body 15, but the engaged rotating body 17 is configured to rotate integrally with the winding body 15. For example, a configuration provided integrally with the rotating shaft of the winding body 15 or a configuration that rotates integrally with the winding body 15 through a gear or the like may be employed.

Further, as a preferable aspect in which the engaged rotating body 17 and the winding body 15 are separated, the winding body 15 may be rotated only in the winding direction with respect to the engaged rotating body 17. More specifically, a rotation direction limiting means (for example, a one-way clutch or a ratchet mechanism) is provided between the winding body 15 and the engaged rotating body 17, and the winding body 15 is wound around the engaged rotating body 17. It is configured to be rotatable only in the taking direction.
According to this configuration, when an obstacle or the like comes into contact with the opening / closing body 10 that is rising, the string-like member a can be prevented from being loosened by the contact.
That is, according to the illustrated opening / closing devices 1 to 5, when an obstacle or the like comes into contact with the opening / closing body 10 that is rising by the operation of the opening / closing machine 40 from below, the winding body 15 and the engaged rotation After the body 17 is locked, there is a possibility that the string-like member a is loosened due to the lifting of the opening / closing body 10.
However, according to the above configuration, even when an obstacle or the like comes into contact with the ascending opening / closing body 10, the winding body 15 rotates in the winding direction with respect to the locked engaged rotating body 17, and the string-like member Since a is wound up, slack of the string-like member a can be avoided.

  Further, according to the above embodiment, the engaged rotating body 17 is formed in a gear shape as a particularly preferable example, but the outer peripheral shape of the engaged rotating body 17 is the engaging portion of the engaging rotating member 62. As long as it has a concave portion and / or a convex portion that can be fitted to each other, other examples include a mode in which concave portions are formed at predetermined intervals on the cylindrical outer peripheral surface, or convex portions at predetermined intervals on the cylindrical outer peripheral surface. It is possible to have an aspect in which is formed.

  Moreover, according to the said embodiment, it was set as the structure which meshes | engages an engagement rotation member (62, 63 or 64) with the outer peripheral part of the to-be-engaged rotary body 17, and brakes the winding body 15. As an example, a structure in which the winding member 15 is braked by sliding the engagement rotating member on the winding member 15 or the engaged rotating member 17 may be employed.

  Moreover, according to the said embodiment, as an especially preferable aspect, the engagement location of the engaging part (14, 13a1, 62a, 63b, 64a or 64b) and the winding body 15 or the to-be-engaged rotating body 17 is outer periphery. However, as another example, a structure in which the engaging portion is engaged with a side portion of the winding body 15 or the engaged rotating body 17, or the engaging portion is the winding body 15 or the engaged rotation. A structure that engages with the shaft portion of the body 17 may be used.

  Further, according to the opening / closing device 3 (see FIGS. 12 to 16) of the above embodiment, the engagement rotation member 63 is provided with the two pressure receiving portions, the first pressure receiving portion 63c and the second pressure receiving portion 63d. The pressure receiving portion only needs to be formed so that the pressure receiving position comes close to the rotation center portion with the rotation of the engaging rotation member due to the rising of the movable seat plate 12, and as another example, It is also possible to adopt an aspect composed of three or more protrusions formed so as to move the pressure receiving position as described above, or an aspect composed of a single protrusion curved so as to move the pressure receiving position as described above. is there.

1, 2, 3, 4, 5: Opening and closing device 10: Opening and closing body 11: Opening and closing body main body 12: Movable seat plate 14: Friction member (engaging portion) 13, 13 ': Swing member 15: Winding body 17: Engaged rotating body 19: Auxiliary rotating body 42: Brake mechanism 44: Operating body 50: Automatic closing device 52: Advance / retract member 62: Engagement rotation member 62a: Engagement part 63: Engagement rotation member 63b: Engagement Part 63b1: First protrusion 63b2: Second protrusion 63c: First pressure receiving part 63d: Second pressure receiving part 64: Engagement rotation member 64a: First engagement part 64b: Second engagement part a: String member X: Obstacle

Claims (4)

Opening / closing body main body that can be closed downward while sliding, a movable seat plate that is connected to a lower end of the opening / closing body main body and is movable upward relative to the opening / closing body main body, and closing operation of the opening / closing body main body A brake mechanism capable of braking the winding body, a winding body that is rotatably supported by the opening / closing body main body and biased in the winding direction, and engages with the winding body to brake the rotation of the winding body An engagement portion provided so as to be wound, a string-like member provided so that one end side is wound around the winding body and the brake mechanism is braked by a tension on the other end side, and the winding body An auxiliary rotating body that rotates synchronously, and the engagement member is engaged with the auxiliary rotating body by raising the movable seat plate facing the opening / closing body main body to generate the tension in the string-like member. A switchgear,
An engagement rotation member supported by the opening / closing body main body so as to rotate by raising the movable seat plate facing the opening / closing body main body;
The engagement rotation member is provided with the engagement portion around a rotation center portion thereof,
On the outer periphery of the auxiliary rotating body, there is provided a recess that meshes with the engaging portion,
The winding body is provided with a rotating body to be engaged coaxially and integrally, and the outer periphery of the rotating body to be engaged is engaged with the outer periphery of the auxiliary rotating body to synchronize the auxiliary rotating body. To rotate,
When the engaging rotation member is rotated by ascending the movable seat plate, in the lower valley portion between the auxiliary rotating body and the engaged rotating body, both of the rotating bodies are An opening and closing device characterized by fitting engagement portions .   2. The opening / closing device according to claim 1, wherein the auxiliary rotating body is provided so as to be aligned in the opening / closing body width direction with a rotation axis parallel to the winding body. A swinging member is supported on the lower end side of the opening / closing body main body so as to be pressed from below by the movable seat plate and swing upward. The swinging member swings the engaging portion to the auxiliary rotating body. The switchgear according to claim 1, wherein the switchgear is engaged with the switchgear. The engagement rotation member is engaged with the winding body and the auxiliary rotation body by pushing the engagement rotation member upward by the movable seat plate that is raised relative to the opening / closing body body. The switchgear according to any one of claims 1 to 3, wherein the switchgear is rotated in a direction to be moved .

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