JP5639694B2 - 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 side, and more particularly, a fire prevention shutter, a smoke prevention shutter, 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, for example, Patent Document 1 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, an invention is desired in which obstacle detection is transmitted by a mechanical structure and the closing operation of the opening / closing body is stopped.
However, in the mechanical obstacle sensing structure, an automatic closing device (for example, see Patent Document 2) for starting automatic closing of the opening / closing body, a brake mechanism (for example, see Patent Document 3) operated by the automatic closing device, etc. Ingenuity is required so as not to hinder operability.

JP 2004-308222 A JP 2003-120155 A Japanese Utility Model Publication No. 01-118084

  The object of the present invention is to provide an opening / closing device having a mechanical obstacle sensing structure which is not easily affected by power supply failure and the like, and in particular, an automatic closing device and a brake mechanism with good operability.

One means for solving the above problems includes an opening / closing body main body capable of closing its own weight while sliding, and a movable seat plate connected to a lower end of the opening / closing body body and movable upward relative to the opening / closing body body. A guide rail that surrounds and guides the widthwise end of the opening / closing body main body, a brake mechanism that brakes or releases the closing operation of the opening / closing body main body, and according to a closing command An automatic closing device for bringing the brake mechanism from the braking state to the released state, and a seat plate interlocking mechanism for bringing the brake mechanism from the released state to the braking state in conjunction with the upward movement of the movable seat plate. The opening and closing device, wherein the brake mechanism is configured to be released from the braking state by pushing the operating body forward against the urging force of the urging member, the automatic closing device, The operating body was pushed A lever member capable of moving back and forth between the advanced position and the return position retracted to the original state, a biasing member that biases the lever member in the forward direction, and the lever member when retracted are engaged at the return position. An engaging / disengaging device that stops and releases the locked state in response to a closing command, and the seat plate interlocking mechanism is configured to move the lever member when the lever member advances from the front side of the return position. forward delayed by the resistance of the damper means of, when said lever member is advanced from the return position is kept free of the resistance due to the damper means, the seat plate interlocking mechanism, the upper side of the movable seat plate A tension raising mechanism that raises the tension of the first string-like member by moving to the position, and a rotating body provided to rotate in one direction by being pulled by the first string-like member whose tension is raised by the tension raising mechanism When A second string-like member provided so that one end side is fixed to the outer peripheral side of the rotating body and the lever member is pulled toward the return position side by the other end side, and the rotating body is engaged with the rotating body. And the damper means for providing resistance to rotation in the opposite direction to the one direction .

  Since the present invention is configured as described above, it has a mechanical obstacle sensing structure that is not easily affected by a power failure or the like, and in particular, an automatic closing device and an opening / closing device with good operability of the brake mechanism. Can be provided.

It is a front view which shows an example of the switchgear concerning this invention. It is structural drawing 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 an enlarged front view of a rotary body and an automatic closing device. It is an internal structure figure of a tension raising mechanism. It is a whole block diagram of a seat board interlocking mechanism, a tension raising mechanism is in a tension relaxation state, and shows a state where a lever member of an automatic closing device is maintained in a return position. It is a whole structure figure of a seat board interlocking mechanism, a tension raising mechanism is in a tension relaxation state, and shows a state where a lever member of an automatic closing device was in an advance position. It is a whole block diagram of a seat board interlocking mechanism, a tension raising mechanism will be in a tension rise state, and the lever member of an automatic closing device will be shown in the state where it was returned to the back. It is a top view which shows an example of an uneven surface part and a string-like member. It is a top view which shows the other examples of an uneven | corrugated surface part and a string-like member. It is an enlarged front view which shows the other example of a rotary body and a damper means. It is a principal part schematic diagram which shows an operation state about the other examples of a seat board interlocking mechanism, (a) shows the normal state corresponding to the full open stop state of an opening-closing body, (b) is a brake mechanism by operation | movement of an automatic closing device. A state in which the brake is operated is shown, and (c) shows a state in which the brake mechanism is braked by the tension acting on the string-like member. FIG. 4 is a schematic diagram of a main part for explaining an operating state for an example in which a gap is not provided between the lever member and the operating body, and (a) shows a normal state corresponding to a fully opened stop state of the opening and closing body; (B) shows a state in which the brake mechanism is released by the operation of the automatic closing device, and (c) shows a state in which the brake mechanism is automatically returned by the tension acting on the string-like member.

One of the features of the present embodiment is that an opening / closing body main body that can be closed by its own weight while sliding, and a movable seat plate that is connected to the lower end of the opening / closing body main body and is movable upward relative to the opening / closing body main body. A brake mechanism that brakes or releases the closing state of the opening / closing body, an automatic closing device that releases the brake mechanism from the braking state in response to a closing command, and the movable seat plate An opening / closing device having a seat plate interlocking mechanism that shifts the brake mechanism from a released state to a braked state in conjunction with the upward movement of the brake mechanism, wherein the brake mechanism resists the biasing force of the biasing member. The automatic closing device is configured to move forward and backward between a forward position where the operating body is pushed and a return position where the operating body is moved back to the original state. Possible lever member and the lever part An urging member that urges the lever member in the forward direction, and an engagement / disengagement device that engages the lever member when retreating at the return position and releases the engagement state according to a closing command, The seat plate interlocking mechanism pulls the tension raising mechanism that raises the tension of the first string-like member by the upward movement of the movable seat plate and the first string-like member whose tension is increased by the tension raising mechanism. A rotating body provided to rotate in one direction and a second end provided to be attached to the outer peripheral side of the rotating body and to pull the lever member toward the return position side by the other end side. A string member, and damper means for engaging the rotating body to provide resistance to rotation of the rotating body in a direction opposite to the one direction, and when the lever member moves forward from a return position, the damper Said resistance by means And so not subject to.
According to this configuration, when the lever member of the automatic closing device advances from the return position, the second string-like member and the rotating body are not subjected to resistance by the damper means. Accordingly, the lever member can be rapidly advanced from the return position, and consequently, the brake mechanism is prevented from being delayed from being released to being released, thereby preventing the start of the closing operation of the opening / closing body from being delayed. Can do.

As another feature, the second string-like member is connected to the lever member at the return position in a slack state.
According to this configuration, the configuration in which the lever member is not subjected to resistance by the damper means when moving forward from the return position can be a specific structure with good productivity.

As another feature, the slack of the second string-like member is adjusted so as to be substantially eliminated when the lever member moves from the return position to the advance position.
According to this configuration, the slack of the second string-like member is substantially eliminated when the lever member moves from the return position to the advance position. Therefore, it is possible to prevent the operation after the lever member has moved to the advanced position (for example, the operation of reversing the lever member when an obstacle is detected) from being delayed due to the slack.

As another feature, an engagement protrusion that can be engaged with the damper means is provided on the outer periphery of the rotating body in a partial range in the circumferential direction, and the engagement protrusion is formed from the return position of the lever member. When the rotating body rotates in the opposite direction with the forward movement of the lever, the damper means disengages from the damper means, and when the rotating body rotates in the one direction with the reverse movement of the lever member from the forward position, the damper A circumferential range is set to engage the means.
According to this configuration, when the lever member advances from the return position, the engagement protrusion can be removed from the damper means so that the lever member does not receive resistance, and as a result, the lever member advances from the return position. Further, it is possible to prevent the start of the closing operation of the opening / closing body from being delayed by delaying the release of the brake mechanism from the braking state.

As another feature, the tension raising mechanism includes two pulley members supported by the opening / closing body main body so as to be separated from each other in the width direction of the opening / closing body, hung on the lower side of the two pulley members, and both end sides thereof are The first string member pulled upward, and the opening / closing body main body so as to move up and down relative to the opening / closing body body on the upper side between the two pulley members in the first string member And a first movable member supported by the opening / closing body, and is supported by the opening / closing body main body so as to move up and down relative to the opening / closing body main body on a lower side between the two pulley members of the first string-like member. And a second movable member provided so as to be pushed by the movable seat plate from the lower side, and a first movable member urging member for urging the first movable member downward. The movable seat plate facing the body body Along with the upward movement, the first string-like member is sandwiched between the two movable members and the tension is increased, and the movable seat plate relative to the opening / closing body is moved downward. Accordingly, the tension between the movable members is widened and the tension of the first string-like member is relaxed.
According to this configuration, when the movable seat plate moves relatively upward due to obstacle contact or the like, the second movable member moves upward due to being pushed by the movable seat plate, and the second string member A portion between the two pulley members is sandwiched between the first movable member and the second movable member and pulled upward, and the tension is increased by increasing the tension of the first string-like member.
Further, when the movable seat plate moves relatively downward due to the removal of the obstacle, etc., the first movable member and the second movable member are moved downward to relieve the tension of the second string-like member. The tension is relaxed.

Other features include a traction device that pulls upward one end side of the first string-like member, and the other end side of the first string-like member is fastened to the outer peripheral side of the rotating body. .
According to this configuration, the first string-like member has its one end side pulled by the traction device, and the other end side is fixed to the outer peripheral side of the rotating body. To do. Therefore, the tension raising operation and the tension relaxation operation of the first string-like member by the tension raising mechanism can be performed satisfactorily.

Since the above embodiment is configured as described above, the following effects can be obtained.
When the lever member of the automatic closing device advances from the return position, the lever member can be rapidly advanced because it is not subjected to resistance by the damper means for delaying the restart of the closing operation.
Therefore, it is possible to improve the operability of the automatic closing device and the brake mechanism in addition to having a mechanical obstacle sensing structure that is not easily affected by a power failure or the like.

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.

Next, preferred embodiments of the present invention will be described in detail with reference to the drawings.
The present embodiment is arranged in or inside an opening part or inside of a housing such as a house, building, warehouse, factory, underground shopping street, tunnel, vehicle loading platform, etc., opens and closes the opening part, partitions or opens the space inside the housing. As an especially preferred embodiment, an example applied to a fire-proof shutter device that is automatically closed in the event of an emergency such as a fire to prevent the spread of flames and smoke will be described.

  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 brake mechanism is activated by the mechanical operation of the seat plate interlocking mechanism A. 42 is changed from the released state to the braking state, and the closing operation of the opening / closing body 10 is stopped.

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 end of the opening / closing body 11 in the closing direction (the lower end in the illustrated example).
Other examples of the opening / closing body 10 include a mode in which one or a plurality of panels, a sheet-like material, a net-like material is provided in the opening / closing direction, or a slat, a panel, a pipe, a sheet-like material, a net-like material, etc. It is good also as an aspect etc. which combine.

The movable seat plate 12 is a member that extends over substantially the entire length in the opening / closing body width direction, and projects 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 opening / closing body opening / closing direction (vertical direction in FIG. 1) relative to the opening / closing body main body 11.
For example, the movable seat plate 12 may be moved in the vertical direction by engaging the upper end portion of the movable seat plate 12 with the lower end portion of the opening / closing body main body 11 so as to slide a predetermined amount in the vertical direction.
And the contact part 12a (refer FIG. 5) for operating the seat board interlocking mechanism A is provided so that this movable seat board 12 may move up and down integrally. For example, the contact portion 12 a may be fixed to the upper end portion of the movable seat plate 12, or may be pivoted on the opening / closing body 11 so as to swing integrally with the movable seat plate 12. You may make it fix to a member (not shown).
The material of the movable seat plate 12 is preferably a hard material (for example, a metal or a hard resin material) from the viewpoint of operability, but a part or the whole of the movable seat plate 12 is made of an elastic material ( For example, you may comprise from rubber | gum, an elastic resin material, etc.).

  The guide rail 20 is a member having a substantially U-shaped cross section that surrounds an end of the opening / closing body 10 in the width direction, and a contact target portion p (for example, a floor surface, the ground, or a frame member) seated by the opening / closing body 10. Etc.) and the winding device 30.

  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. It is equipped with.

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 diagram showing the main part of the opening / closing device 40 and the internal structure of the automatic closing device 50, and shows the opening / closing device 40 in a sectional view.
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 the switch 40 is used only for its own weight or manual opening / closing, the opening / closing machine 40 omits the motor unit 41 and brakes the rotation of the driving shaft 41b (and the manual driving mechanism). ).

  Further, the brake mechanism 42 is configured such that the operating body 44 is pushed in one direction (rightward in FIG. 2) against the urging force of the urging member 42c (coil spring in the illustrated example). Thus, the driving shaft 41b is configured to be in a released state in which the driving shaft 41b is rotatably released from a braking state in which the driving shaft 41b is unrotatably restrained. FIG. 2 shows a braking state.

  Further, the automatic closing device 50 is in a forward position (the position shown in FIG. 3B according to the illustrated example) in which the operating body 44 is pushed into the casing 51 fixed to the opening / closing device 40 and the original initial state. A lever member 52 capable of moving back and forth between the retracted return position (the position shown in FIG. 3A according to the illustrated example), a biasing member 53 for biasing the lever member 52 in the forward direction, and the retracted position An engaging / disengaging device 54 that locks the lever member 52 at the time of return at the return position and releases the locked state in response to a closing command, and a manual return member that manually returns the lever member 52 at the time of advance to the return position 55, and the front end side of the lever member 52 protrudes in the direction of the operating body 44.

The lever member 52 is a member that is supported so as to slide back and forth within the casing 51, and has a front end protruding outside the casing 51. The lever member 52 is disposed so as to have a gap s between the lever member 52 and the operating body 44 of the brake mechanism 42 when in the return position (see FIG. 3A). As will be described later in detail, the gap s acts to prevent the lever member 52 of the automatic closing device 50 from moving backward until it reaches the return position.
In addition, a manual return member 55 and a second string-like member a2 described later are connected to the rear end side of the lever member 52.

The biasing member 53 is a tension spring according to the illustrated example, but may be replaced with a compression spring that presses the lever member 52 from the rear side (left side in FIG. 2).
The engaging / disengaging device 54 engages the lever member 52 with a plunger 54a urged by an urging force of an internal urging member (not shown), and retracts the plunger 54a with an electromagnetic force of an electromagnetic solenoid, 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 lever member 52 and protrudes rearward of the casing 51, and manually moves the lever 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 the closing command is received at the initial position (return position) shown in FIG. 3A, the locking state by the engagement / disengagement device 54 is as shown in FIG. 3B. When the lever member 52 is released, the lever member 52 moves forward by the urging force of the urging member 53, and becomes the advance position where the operation unit 44 is pressed.
When the manual return member 55 is pulled backward (leftward according to FIG. 3) by manual operation at the forward position, the lever member 52 is locked by the engagement / disengagement device 54 (see FIG. 3). Return to 3 (a)). At the time of the return operation by the manual return member 55, the slack a21 is formed on the second string-like member a2 (see FIG. 6), and is not affected by the restriction of the rotating body 70, the rotation delay, or the like. .
The engagement / disengagement device 54 may be configured to be released electrically by an electrical closing command, but as another example, may be configured to be released by a mechanical force transmission closing command, or It is also possible to selectively use one of these two configurations or to use both of these two configurations.

  Further, during the closing operation of the opening / closing body 10, the seat plate interlocking mechanism A mechanically interlocks with the upward movement of the movable seat plate 12 and pulls the lever member 52 of the automatic closing device 50 backward to open the opening / closing machine 40. The brake mechanism 42 is changed from the released state to the braked state (see FIGS. 6 to 8).

  If it demonstrates in detail, the seat board interlocking mechanism A is provided over the opening-and-closing body width direction, and the 1st string-like member a1 by which both ends were pulled upwards, and the one end side of the 1st string-like member a1 upward A traction device 60 for traction, a rotator 70 provided to rotate in one direction (counterclockwise in the illustrated example) by being pulled to the other end of the first string-like member a1, and One end side is fixed to the outer peripheral side and the other end side engages with the second string-like member a2 provided to pull the lever member 52 to the return position side (left side in FIG. 6) and the rotating body 70. Then, a damper means 80 that gives resistance to the rotation of the rotating body 70 in the reverse direction (clockwise in the illustrated example), and the tension of the first string-like member a1 is increased by the upward movement of the movable seat plate 12. And a tension raising mechanism 90.

According to a preferred example of the present embodiment, the first string-like member a1 is a metal wire configured to have irregularities on the outer peripheral surface by bringing a large number of metal wires together. The first string-like member a1 may be a long member having flexibility. As another example, the first string-like member a1 may be a band-like object, a chain-like object, a string, or the like. The first string-like member a1 is preferably configured so as not to easily expand or contract.
The first string-like member a1 is inserted in a tension raising mechanism 90 to be described later, thereby being positioned on the lower end side of the opening / closing body main body 11 in the opening / closing body width direction.
One end side of the first string-like member a <b> 1 is pulled upward by the pulling device 60. Further, the other end side of the first string-like member a1 is connected to the outer peripheral side of the rotating body 70 via an elastic member 73.

The traction device 60 includes, for example, a winding body 61 that is rotatably supported by a stationary part that is higher (on the opening direction side) than the tension increasing mechanism 90 when the opening / closing body 10 such as the storage case 31 is fully opened, and the winding body 61. And a spring spring (not shown) for urging the winding body 61 in the winding direction, and the one end side of the first string-like member a1 is fixed to the outer peripheral surface of the winding body 61. The urging force of the spring spring is appropriately set so as not to hinder the operation of the tension raising mechanism 90 and the rotating body 70, which will be described later, while having a magnitude that the first string-like member a1 does not loosen significantly. .
A first string-like member a1 that is at least twice as long as the opening / closing stroke of the opening / closing body 10 is wound around the pulling device 60 so that the opening / closing body 10 is fully opened.

Further, the rotating body 70 is a spur gear-like member according to the illustrated example, and is fixed to an immovable portion higher (on the opening direction side) than the tension raising mechanism 90 when the opening / closing body 10 such as the storage case 31 is fully opened. While being pivotally supported by the substantially flat support bracket 71, it is biased in the direction of pulling the first string-like member a1 (clockwise in the illustrated example) by the rotation biasing member 71b.
A convex engaging portion 71 a is fixed to the support bracket 71. The rotating body 70 is formed with an engaged portion 72 so as to engage with the engaging portion 71a within a predetermined rotation range.

According to the illustrated example, the engaging portion 71a is a substantially cylindrical pin made of a hard material. Further, the engaged portion 72 is a substantially arc-shaped long hole centered on the rotation center of the rotating body 70, and is inserted through the engaging portion 71a.
As another example, the engaged portion 72 can be a recess that can be engaged with the engaging portion 71a. As another example, a configuration in which the concave-convex relationship between the engaging portion 71a and the engaged portion 72 is reversed may be employed.

  The length Sw (see FIG. 4) of the engaged portion 72 is that of the rotating body 70 corresponding to the stroke Sj (see FIG. 3 (b)) from the return position of the lever member 52 to the advanced position in the automatic closing device 50. The amount of movement of the engaged portion 72 at the radial position is set smaller than necessary. This setting is preferable to prevent the lever member 52 of the automatic closing device 50 from automatically returning from the forward position (position shown in FIG. 3B) to the return position (position shown in FIG. 3A). It is a setting.

The rotation urging member 71b is a torsion spring that is provided at the shaft support portion of the rotator 70 and urges the rotator 70 in the reverse direction (clockwise in the illustrated example). The urging force of the rotation urging member 71b is set to be larger than the resistance force of the damper means 80 so that the rotating body 70 cannot be rotated in the reverse direction by the resistance force of the damper means 80. .
In addition, when the first string-like member a1 is changed from the tension increasing state to the tension relaxation state by the releasing operation of the tension increasing mechanism 90 described later, the time for the rotating body 70 to rotate in the reverse direction is the time of the rotation biasing member 71b. By appropriately adjusting the urging force and the resistance force of the damper means 80, it is preferably in the range of 2 to 8 seconds, and more preferably in the range of 3 to 4 seconds.

The engaging portion 71a and the engaged portion 72 having the above-described configuration regulate the amount of rotation in one direction of the rotating body 70 (counterclockwise in the illustrated example), so that the lever member 52 of the automatic closing device 50 is It functions as an automatic return prevention means for preventing the second string-like member a2 from pulling back to the return position.
Further, the engaging portion 71a and the engaged portion 72 regulate the amount of rotation of the rotating body 70 in the reverse direction (clockwise in the illustrated example), so that the lever member 52 of the automatic closing device 50 returns. When returning to the position, the rotating body 70 rotated in the reverse direction by the urging force of the rotation urging member 71b is stopped at the initial position, and the second string-like member a2 is returned to the state having the slackness a21. Function.

  The other end side of the first string-like member a <b> 1 is connected to the rotating body 70 configured as described above via an elastic member 73 on the outer peripheral side of the side surface. The elastic member 73 is a coil spring, for example, and relieves the rapid increase in the tension of the first string-like member a1 as compared with the case where the elastic member 73 is not interposed. Further, the elastic member 73 relieves an impact when the rotating body 70 rotates and the engaged portion 72 engages with the engaging portion 71a.

Moreover, the one end side of the 2nd string-like member a2 is fastened to the rotation body center side rather than the fastening location of the 1st string-like member a1 in the side surface of the rotary body 70. FIG.
The second string member a2 is a long member made of the same material as the first string member a1. The second string-like member a2 has a slack a21 and the other end is connected to the lever member 52 at the return position.

According to the illustrated example, the slackness a21 is partially provided on the side of the automatic closing device 50 in the second string-like member a2 in order to express the function clearly, and the amount of slackness is expressed larger. Actually, the slack extends over the entire length of the second string-like member a2 and is smaller than illustrated. As another example, the slackness a21 may be provided on a part of the second string-like member a2 as illustrated.
This slackness a21 is appropriately adjusted so as to be substantially eliminated when the lever member 52 of the automatic closing device 50 moves from the return position to the forward movement position.
According to this slackness a21, when the lever member 52 of the automatic closing device 50 advances from the return position, the second string-like member a2 does not rotate the rotating body 70, that is, does not receive resistance by the damper means 80. Can be.

  Further, the damper means 80 is a so-called one-way type rotary damper device, and a braking rotator 81 that is a gear meshes with the rotator 70 to move in the reverse direction of the rotator 70 (clockwise in the illustrated example). When the rotating body 70 rotates in one direction (counterclockwise in the illustrated example), the resistance is released.

If the fastening location of the 1st string-like member a1 and the 2nd string-like member a2 with respect to the rotary body 70 is demonstrated in detail, as shown in FIG. F = (r / R) where f is the tensile force of the string-like member a2, R is the radius of the fastening position of the first string-like member a1, and r is the radius of the fastening position of the second string-like member a2. The formula of xf is established. The ratio of the movement amount of the first string member a1 and the movement amount of the second string member a2 is equal to the ratio of the radius r and the radius R.
Therefore, for example, when it is desired to reduce the tensile force F of the first string-like member a1, the radius R and / or the radius r may be adjusted.
In addition, for example, when changing the direction of the tensile force f of the second string-like member a2, the fastening position of the second string-like member a2 can be replaced with an arbitrary point of the radius r.

  Further, as shown in FIG. 5, the tension raising mechanism 90 is separated in the width direction of the opening / closing body in a case member 91 made of, for example, metal or hard resin, supported so as to be adjustable in height with respect to the opening / closing body main body 11. The two pulley members 92, 93 supported in the above manner, the first string-like member a1 that is hung on the lower side of the two pulley members 92, 93 and both ends are pulled upward, and the first string The first movable member 94 supported so as to swing in the vertical direction above the portion between the two pulley members 92, 93 in the member a1, and the two pulley members 92, 93 in the first string member a1. A second movable member 95 that is supported so as to swing in the vertical direction on the lower side of the intermediate portion and is pushed by the movable seat plate 12 from the lower side, and the first movable member 94 are moved downward. For the first movable member It has and a member 96.

  The tension increasing mechanism 90 is in a tension increasing state in which the first string-like member a1 is sandwiched between the movable members 94 and 95 and pulled upward as the movable seat 12 moves upward (see FIG. 8). And the tension relaxation state in which the tension of the first string-like member a1 is relaxed by the movement of the movable members 94 and 95 in the opposite direction accompanying the downward movement of the movable seat 12 (see FIGS. 6 and 7). State).

  According to the illustrated example, the case member 91 is a substantially rectangular parallelepiped box-shaped member that opens downward, and has a flange portion 91a at each of the left and right ends thereof. A washer 91b is provided below the flange 91a, and a screw 91c is inserted through the flange 91a and the washer 91b. The distal end side of the screw 91c is screwed to the opening / closing body main body 11.

Therefore, according to the said structure, the height position with respect to the opening-closing body main body 11 of the case member 91 is adjusted by changing the number of washers 91b, and also the initial stage of the 1st movable member 94 and the 2nd movable member 95 is adjusted. It is possible to adjust the clamping force of the interval of the state (the state in which the movable seat plate 12 is fully lowered).
That is, for example, if the number of washers 91b is increased, the position of the case member 91 becomes higher and the second movable member 95 moves relatively downward, so that the first movable member 94 and the second movable member 95 The space between the two is widened, and as a result, the wear of the first string-like member a1 can be reduced.
On the contrary, if the number of washers 91b is decreased, the position of the case member 91 is lowered and the second movable member 95 is relatively moved upward, so that the first movable member 94 and the second movable member 95 The time narrows. Therefore, by adjusting these, both the movable members 94, 95 can be prevented from holding the first string-like member a1 from the initial stage, or the first string-like member a1 can be prevented from being held by both the movable members 94, 95. Therefore, the required stroke of the movable seat plate 12 until it is sufficiently clamped by the second seat can be set satisfactorily. As a result, the operability of the seat plate interlocking mechanism A can be improved.
That is, for example, if the position of the case member 91 is lowered, the first string-like member a1 is sufficiently sandwiched between the movable members 94 and 95 even when the amount of lift of the movable seat 12 is relatively small. .

A window portion 91d is provided on the front side surface portion (not shown) of the case member 91 so as to expose a portion of the movable members 94 and 95 sandwiching the first string-like member a1.
The window portion 91d is a rectangular cutout according to the illustrated example, and is arranged so that a gap between the concave and convex surface portions 94a and 95a described later in the movable members 94 and 95 can be seen from the opening / closing body thickness direction side. is there. In other words, when the height of the case member 91 is adjusted, the gap between the concave and convex surface portions 94a and 95a is adjusted so that the clearance gauge is inserted between the concave and convex surface portions 94a and 95a through the window portion 91d. Note that another example of the window portion 91d may be a through hole.
Further, during normal use, the window portion 91d may be closed by sticking a sticker or the like to prevent foreign matter such as dust from entering the window portion 91d.

Further, each of the pulley members 92 and 93 is rotatably supported in the case member 91 with the center thereof directed in the opening / closing body thickness direction.
A plurality of (two in the illustrated example) guide members 93a... Are provided on the inner side of the bent portion of the first string-like member a1 in the vicinity of one pulley member 93 so as to be in sliding contact with the first string-like member a1. 93b is provided.

Each of the guide members 93a and 93b is a hard substantially cylindrical pin-shaped member having an outer diameter smaller than that of the pulley member 93.
These two guide members 93 a and 93 b are disposed on both sides of the pulley member 93. If it demonstrates in detail, the one guide member 93a will be arrange | positioned in the diagonally downward side of the pulley member 93, and will guide the 1st string-like member a1 to a substantially horizontal direction. The other guide member 93b is formed to have an outer diameter slightly smaller than that of the guide member 93a, and is disposed obliquely above the pulley member 93 to guide the first string member a1 upward.

The guide members 93a and 93b are in sliding contact with the bent portion of the first string-like member a1 around the pulley member 93, and the increase in the tension of the first string-like member a1 is prevented by the looseness of the bent portion. prevent.
That is, if the guide members 93a and 93b are not provided, the amount of tension of the first string-like member a1 when the tension is raised from the tension-relaxed state is reduced due to the slack of the bent portion, and the seat plate There is a possibility that the operability of the interlocking mechanism A may be impaired. However, in a preferred example of the present embodiment, the guide member 93a, 93b can secure a relatively large amount of tension of the first string-like member a1 when the tension is increased, and thus the seat plate interlocks. The operability of the mechanism A can be improved.
In addition, you may make it provide the arbitrary removal prevention means which prevents that the 1st string-like member a1 remove | deviates from the pulley members 92 and 93 as a structure added to the said structure.

Each of the first movable member 94 and the second movable member 95 is provided so as to rotate up and down on the other end side with the same shaft support portion 97 on one end side in the opening / closing body width direction as a fulcrum. It is a substantially rod-shaped member having a thickness in the vertical direction and a width in the opening / closing body thickness direction. The first movable member 94 and the second movable member 95 are disposed at substantially the same position as the first string member a1 in the opening / closing body thickness direction.
The rotation fulcrum (shaft support 97) of the first movable member 94 and the rotation fulcrum (shaft support 97) of the second movable member 95 are from the portion between the pulley member 92 and the pulley member 93 in the first string-like member a1. Is also arranged on the upper side.
And these 1st movable members 94 and the 2nd movable member 95 rotate upwards on both sides of the 1st string-like member a1, and the tension | tensile_strength rise state (state shown in FIG. 8) of the 1st string-like member a1 In addition, the first string-like member a1 is returned to the tension relaxation state (the state shown in FIG. 7) by rotating in the reverse direction.
It is preferable that the first movable member 94 and the second movable member 95 are made of metal, hard synthetic resin, or the like and are manufactured with a strength that hardly causes bending.

The first movable member 94 and the second movable member 95 can be configured to rotate up and down with different shaft support portions (not shown) as fulcrums. When both the movable member 94 and the second movable member 95 are rotated, the amount of friction between the first movable member 94 and the second movable member 95 becomes relatively large. There is also a possibility that the wear of the first string-like member a1 sandwiched between the movable members 95 is also increased.
Therefore, in a preferred example of the present embodiment, the first movable member 94 and the second movable member 95 are configured such that the first movable member 94 and the second movable member 95 rotate with the same shaft support portion 97 as a fulcrum. When the members 95 rotate together, the amount of rubbing between the first movable member 94 and the second movable member 95 is made relatively small, and the first movable member 94 and the second movable member 95 are separated from each other. The wear of the first string-like member a1 to be sandwiched is reduced.

The first movable member 94 has a concavo-convex surface portion 94a pressed against the first string-like member a1 when in the tension increasing state, and is in the tension increasing state closer to the rotating end than the concavo-convex surface portion 94a. At the same time, the regulating protrusion 94b that abuts against the second movable member 95 and restricts the increase in the pressing force of the movable members 94, 95 relative to the first string-like member a1 has an opening / closing body thickness with respect to the first string-like member a1. They are shifted in the vertical direction.
Furthermore, the first movable member 94 protrudes toward the first string-like member a1 from the uneven surface portion 94a to the first string-like member a1 side when in the tension relaxation state, closer to the rotating end side than the uneven surface portion 94a. It has the protrusion 94c slidably contacted.
The first movable member 94 is regulated in the downward rotation amount by the tip end portion on the rotation end side coming into contact with the regulation convex portion 91e fixed to the case member 91.

Further, the second movable member 95 has an uneven surface portion 95a that is pressed against the first string-like member a1 when in the tension increasing state, and the tension relaxation state is closer to the rotation fulcrum side than the uneven surface portion 95a. The projection 95b protrudes from the concave and convex surface portion 95a toward the first string-like member a1 and is in sliding contact with the first string-like member a1.
And the 2nd movable member 95 has the to-be-contacted part 95c contact | abutted by the contact part 12a by projecting below on the rotation end side rather than the uneven | corrugated surface part 95a, and also the rotation end side. Has a weight 95d. According to the illustrated preferred example, the contacted portion 95c is formed in a shape (more specifically, substantially V-shaped) having a convex portion on the lower surface side and a concave portion on the upper surface side.

The positional relationship among the restricting convex portion 91e, the distal end portion of the first movable member 94, and the contacted portion 95c will be described in detail as follows.
That is, in the state where the first movable member 94 is not moving upward (the state shown in FIG. 5), the positions of the restricting convex portion 91e and the tip end portion of the first movable member 94 correspond (specifically, the restricting convex portion 91e). When the second movable member 95 is moved upward (the state shown in FIG. 8), the restriction convex portion 91e and the contacted portion 95c are in contact with each other. The positions of the restricting convex portion 91e and the first movable member 94 are such that the positions correspond (specifically, the first string-like member a1 is sandwiched between the restricting convex portion 91e and the contacted portion 95c). A tip end portion and a contacted portion 95c are provided.

  In addition, the restricting convex portion 91e covers the first string-like member a1 when the first movable member 94 and the second movable member 95 sandwich the first string-like member a1 and move upward beyond a predetermined amount. Guide along the contact portion 95c while bending (see FIG. 8), and further increase the tension of the first string-like member a1, and restrict the upward movement of the second movable member 95. It arrange | positions in an appropriate position so that it may act as a stopper.

Further, the protrusion 95b is an uneven surface portion in the first string member a1 in a state where the first movable member 94 and the second movable member 95 sandwich the first string member a1 (the state shown in FIG. 8). The amount of protrusion of the first movable member 94 is appropriately adjusted so that the first movable member 94 is in contact with the portion of the first movable member 94 closer to the rotation fulcrum (shaft support portion 97) and the portion is prevented from moving downward from the uneven surface of the uneven surface portion 94a. Is set.
Similarly, the protrusion 94c is an unevenness in the first string-like member a1 in a state where the first movable member 94 and the second movable member 95 sandwich the first string-like member a1 (the state shown in FIG. 8). The amount of protrusion is set appropriately so as to contact the portion closer to the rotation end than the surface portion 95a and prevent the portion from separating upward from the uneven surface of the uneven surface portion 95a.
Therefore, in FIG. 8, the first string-like member a1 is positioned above the uneven surface of the uneven surface portion 94a on the left side of the uneven surface portion 94a, and below the uneven surface of the uneven surface portion 95a on the right side of the uneven surface portion 95a. Therefore, the uneven surface portion 94a and the uneven surface portion 95a are stably held.

When the first movable member 94 and the second movable member 95 rotate with the first string-like member a1 sandwiched between them, the action of the protrusions 95b and 94c is as described above. Without relying on the above, between the pulley member 92 and the pulley member 93, the portion on the rotation fulcrum side (the left side in the drawing) of the first string-like member a1 is closer to the first movable member 94 side, and the first string-like shape Since the part of the rotation end side (right side in the drawing) of the member a1 is closer to the second movable member 95 side, the first string-like member a1 is stably held between the uneven surface portion 94a and the uneven surface portion 95a. .
Therefore, according to the above configuration, even when there is some variation in the amount of rotation of the first movable member 94 and the second movable member 95, the first string-like member a1 is always stable by the uneven surface portion 94a and the uneven surface portion 95a. Can be held between.

  Each of the concavo-convex surface portions 94a and 95a is formed in a sawtooth shape in cross section, and is arranged symmetrically so as to increase the frictional resistance when the first string-like member a1 moves to the rotating body 70 side. (See FIG. 5).

As shown in FIG. 9, the extending direction of the unevenness m1 on the surface of the uneven surface portion 94a (95a) (the direction of the solid line inclined according to the drawing) is the extending direction of the unevenness M on the outer peripheral surface of the first string-like member a1. It is preferable to incline at substantially the same angle and to make the pitches of the unevenness m1 and the unevenness M substantially equal. According to this configuration, the surface of the concavo-convex surface portion 94a (95a) and the outer peripheral surface of the first string-like member a1 can be easily fitted to each other, so that the frictional resistance between them can be made relatively large.
Further, as a more preferable aspect, as shown in FIG. 10, the surface of the uneven surface portion 94a (95a) has unevenness m1 whose extending direction and pitch substantially coincide with the unevenness M of the outer peripheral surface of the first string-like member a1. The protrusions and recesses m2 are provided so that the extending direction is orthogonal to the recesses and protrusions m1 and the pitches are substantially the same. According to this configuration, the alignment between the direction of the unevenness on the surface of the uneven surface portion 94a (95a) and the direction of the unevenness on the outer periphery of the first string-like member a1 is facilitated, and the productivity is good.

Each of the projecting portions 94c and 95b is formed with a smooth cross-sectional substantially mountain shape on the projecting end side so as to contact the first string-like member a1 with the frictional resistance with the first string-like member a1 being minimized. Yes.
When the first string-like member a1 is in the tension relaxation state (the state shown in FIGS. 5 to 7), the projections 94c and 95b are in contact with the first string-like member a1 by the concavo-convex surface portions 94a and 95a. This prevents the single string member a1 from being worn.

The restricting protrusion 94b is disposed so as to abut on the rotating end side of the second movable member 95 and to be in non-contact with the first string-like member a1 in the tension increase state (the state shown in FIG. 8). And according to the example of illustration, it protrudes below from the edge of the opening-and-closing body thickness direction of the 1st movable member 94 (refer FIG. 5).
When the first string-like member a1 is in an increased tension state, the restricting protrusion 94b comes into contact with the second movable member 95, so that the clamping force between the concave and convex surface portions 94a and 95a sandwiching the first string-like member a1. Is prevented from becoming too strong, and as a result, the progress of wear of the first string-like member a1 and the excessive engagement of the uneven surface portions 94a, 95a into the first string-like member a1 are prevented.

  The weight body 95d is a member that urges the rotating end side of the second movable member 95 downward. The uneven surface portion 95a bites into the first string-like member a1, and the second movable member 95 does not rotate downward. Is prevented. The weight body 95d may be provided so as to be movable in the longitudinal direction of the second movable member 95, for example, so that the weight can be adjusted. As another example, a spring for urging the second movable member 95 downward may be provided in place of the weight body 95d.

  The first movable member urging member 96 is a torsion spring disposed on the upper side of the first movable member 94. The first movable member 94 is in contact with the case member 91 at one end and the first movable member 94 at the other end. , The rotating end side of the first movable member 94 is urged downward (see FIG. 5).

Next, the characteristic operation and effect of the switchgear 1 having the above-described configuration will be described in detail.
First, when the opening / closing body 10 is stationary in the fully opened state, as shown in FIG. 6, the lever member 52 of the automatic closing device 50 is in the return position (initial position) where it is locked by the engagement / disengagement device 54. ing.
In this state, the brake mechanism 42 of the opening / closing machine 40 is maintained in a braking state by the urging force of the urging member 42c that is present.
The first string-like member a1 is in a tension relaxation state that is not restrained by the tension raising mechanism 90.
The rotating body 70 is urged clockwise by the urging force of the rotation urging member 71b and is stationary with one end of the engaged portion 72 abutting against the engaging portion 71a.
Moreover, the 2nd string-like member a2 is maintained in the state which has the slackness a21.

When the closing command is received from the above state, as shown in FIG. 7, the automatic closing device 50 is activated, and the lever member 52 released from the engagement / disengagement device 54 in response to the closing command causes the biasing force of the biasing member 53 to move. The lever member 52 pushes the operating body 44 of the brake mechanism 42. At this time, the second string-like member a2 is pulled by the lever member 52 and is in a state in which the slackness a21 (see FIG. 6) is eliminated.
That is, the slackness a21 can prevent the lever member 52 that is about to advance from the initial position from receiving the resistance of the damper means 80 via the second string-like member a2.

In the state shown in FIG. 7, the brake mechanism 42 is released by the pushing of the operating body 44, so that the opening / closing body 10 closes (lowers) due to its own weight. The closing speed at this time is appropriately adjusted by a speed governor (not shown).
While the dead weight is closed, the first string-like member a1 is fed out from the traction device 60 and maintained in a tension relaxation state that is not restrained by the tension raising mechanism 90.
Further, the rotating body 70 is urged clockwise by the urging force of the rotation urging member 71b and is maintained in a stationary state in which one end portion of the engaged portion 72 is brought into contact with the engaging portion 71a.
Further, the second string-like member a2 is maintained in a state where the slackness a21 is eliminated.

When the lower end of the opening / closing body 10 comes into contact with the obstacle X as shown in FIG. 8 while the dead weight is closed, the movable seat plate 12 at the lower end of the opening / closing body 10 moves upward relative to the opening / closing body main body 11. As the movable seat plate 12 moves upward, the second movable member 95 also rotates upward.
Therefore, the portion between the two pulley members 92, 93 in the first string-like member a1 is between the first movable member 94 and the second movable member 95 (specifically, between the two uneven surface portions 94a, 95a). The first string-like member a1 is sandwiched and locked in the linear direction with respect to the first movable member 94 and the second movable member 95, and the closing force (self-weight) of the opening / closing body 10 is suspended from the first string-like member a1. In addition to being hooked, the first movable member 94 and the second movable member 95 pull the portion between the two pulley members 92, 93 in the first string-like member a1 upward, and the first string-like member a1 increases in tension. It becomes a state.

  In addition, the impact at the time of this tension rise is relieved by the elastic member 73 interposed between the first string-like member a1 and the rotating body 70. Therefore, it is possible to prevent, for example, damage to the engaging portion (including the related portion) between the engaged portion 72 and the engaging portion 71a in the rotating body 70 due to the impact.

When the first string-like member a1 is in an increased tension state as described above, the outer peripheral side of the rotating body 70 is pulled by the first string-like member a1, and the rotating body 70 rotates counterclockwise as shown in FIG. To do. Then, the second string-like member a2 is pulled by the rotating body 70 that rotates counterclockwise, and further, the lever member 52 of the automatic closing device 50 is pulled backward (leftward in FIG. 8) by the second string-like member a2. It is done.
Therefore, the operating body 44 of the brake mechanism 42 swings backward, the brake mechanism 42 enters a braking state in which the internal drive shaft 41b is constrained, and the winding shaft 32 interlocked with the drive shaft 41b rotates in the feed direction. It stops and the closing operation (lowering operation) of the opening / closing body 10 is also stopped.
In the initial stage in which the first movable member 94 and the second movable member 95 only sandwich the first string-like member a1, in the state where the tension of the first string-like member a1 is insufficient, the rotation of the rotating body 70 is performed. Although the opening / closing body 10 is not short enough to stop, the opening / closing body 10 is further closed from this state, whereby the first movable member 94 and the second movable member 95 are both turned upward to rotate first. The string-like member a1 is pulled upward in a zigzag bent state, and the tension of the first string-like member a1 is further increased.

When the rotating body 70 rotates counterclockwise as described above, the amount of rotation is regulated by the contact between the engaged portion 72 and the engaging portion 71a. That is, the rotating body 70 rotates counterclockwise by a predetermined amount of rotation due to an increase in tension of the first string-like member a1.
Therefore, the lever member 52 is retracted to the return position (the initial position shown in FIG. 6) by the tensile force of the second string-like member a2, and even if the obstruction X is removed, there is no closing command again. It is possible to prevent the closing operation from being resumed.

Next, when the obstacle X is removed, the movable seat 12 is lowered downward, and the first movable member 94 and the second movable member 95 are rotated downward while widening the gap. Accordingly, the first string-like member a1 returns to the tension relaxation state shown in FIG.
When the first string-like member a1 is in the tension relaxation state, the rotating body 70 is rotated clockwise by the pulling force of the second string-like member a2 due to the biasing force of the biasing member 53 and the biasing force of the rotation biasing member 71b. Rotate to. At this time, the rotation of the rotating body 70 is delayed due to the resistance by the damper means 80. Therefore, the second string-like member a2 also slides with a delay, and the lever member 52 pulled by the second string-like member a2 also starts moving forward with a delay, and pushes the operating body 44 of the brake mechanism 42. To do.
Therefore, after the obstacle X is removed, the brake mechanism 42 is released after a few seconds, and the closing operation of the opening / closing body 10 is resumed.

Further, when the opening / closing body 10 is fully closed, the second movable member 95 is moved upward in accordance with the relative rise of the movable seat plate 12 as in the case of the contact of the obstacle X (see FIG. 8). The first string-like member a1 is turned into a tension increasing state, the rotating body 70 is rotated by a predetermined amount in the counterclockwise direction, pulled by the second string-like member a2, the lever member 52 is retracted, and the brake mechanism 42 is A braking state is established by the biasing force of the biasing member 42c.
In this braking state, for example, the manual return member 55 is pulled backward, whereby the lever member 52 of the automatic closing device 50 is locked at the return position (position shown in FIG. 6), and the opening / closing body 10 is manually opened. When it is returned to the fully open position by the operation, the movable seat plate 12 and both movable members 94 and 95 are lowered and the first string-like member a1 is in a tension relaxation state, so that the rotating body 70 is rotated and biased 71b. Is rotated clockwise by a predetermined amount, the slack a21 is formed in the second string-like member a2, and the initial state shown in FIG. 6 is restored. That is, even when the lever member 52 is locked at the return position and the urging force of the urging member 53 cannot be obtained, the rotator 70 can be rotated clockwise by the urging force of the rotation urging member 71b.

The means for preventing the lever member 52 from retracting to the return position (automatic return prevention means) is configured to restrict the amount of rotation of the rotating body 70 in the counterclockwise direction according to a preferred example of the present embodiment. In addition, a gap s is provided between the operating body 44 of the brake mechanism 42 in the braking state and the lever member 52 in the return position.
That is, according to the configuration that does not have the gap s, as shown in FIGS. 13A to 13C, when the brake mechanism 42 changes from the released state (see FIG. 13B) to the braked state. The lever member 52 may be pushed backward (leftward in the illustrated example) by the operating body 44 to return to the return position (position shown in FIG. 13C).
However, in the present embodiment, as shown in FIG. 3A, since the gap s is provided, the lever member 52 is pushed backward (leftward in the illustrated example) by the operating body 44, and the return position is reached. Can be prevented from returning to.
As another example, a configuration in which the amount of rotation of the rotating body 70 in the counterclockwise direction is restricted, and a configuration in which a gap s is provided between the operating body 44 of the brake mechanism 42 in the braking state and the lever member 52 in the return position. Any one of the configurations may be omitted.

Further, the rotator 70 and the damper means 80 can be replaced with a rotator 70 'and a plurality of (two in the illustrated example) damper means 80' and 80 'shown in FIG.
The rotating body 70 ′ has an engaging protrusion 71 ′ that protrudes in a sector shape and can engage with the braking rotating body 81 of the damper means 80 in a part of the outer periphery. According to the illustrated example, the engaging protrusion 71 ′ is a gear tooth formed in a part of the outer periphery of the rotating body 70 ′. The rotating body 70 ′ is configured to mesh the engaging protrusion 71 ′ with the two damper means 80 ′ within a rotation range regulated by the engaging portion 71a and the engaged portion 72.

Each of the two damper means 80 ′ and 80 ′ is a one-way type rotary damper device similar to the above-described damper means 80, and a plurality of damper means 80 ′ and 80 ′ ensures a large resistance force applied to the rotating body 70 ′. ing.
Further, the second string-like member a2 is fixed to the center side of the rotating body 70 ′ from the fixing position of the first string-shaped member a1 at the side portion of the rotating body 70 ′, and is guided in a substantially horizontal direction. .

  Thus, according to the configuration shown in FIG. 11, since the engaging protrusion 71 ′ is provided only on a part of the outer periphery of the rotating body 70 ′, the portions other than the engaging protrusion 71 ′ of the rotating body 70 ′ are provided. The outer diameter can be reduced. Moreover, since a plurality of damper means 80 'are used, each of them can be relatively small. As a result, the rotating body 70 ′ can be prevented from interfering with other members, and the installation space for the rotating body 70 ′ and the damper means 80 ′ can be reduced.

  Further, according to the above embodiment, the slack a21 is provided in the second string-like member a2 as a means for preventing the damper member 80 from receiving resistance when the lever member 52 advances from the return position. As another example that exhibits the above action, the configuration shown in FIG. 12 may be adopted.

In the configuration shown in FIG. 12, a rotating body 70 ″ having a different outer peripheral shape is used like the above-described rotating body 70 ′ shown in FIG. 11. The rotating body 70 ″ projects in a substantially fan shape and performs braking rotation of the damper means 80. It has an engaging protrusion 71 ″ that can engage with the body 81.
This engaging protrusion 71 ″ is a brake rotating body of the damper means 80 when the rotating body 70 ″ rotates in the reverse direction (clockwise according to FIG. 12) as the lever member 52 advances from the return position. When the rotating member 70 ″ rotates in the one direction (counterclockwise according to FIG. 12) as the lever member 52 moves backward from the forward position, the damper member 80 engages with the braking rotating member 81. In this way, a circumferential range is set.
The urging force of the rotation urging member 71b does not act when the rotating body 70 ″ rotates clockwise from the state of FIG. 12A, but rotates counterclockwise from the state of FIG. 12A. "" Works only when it rotates.

Thus, according to the configuration shown in FIG. 12, when the lever member 52 advances from the initial position (return position) locked to the engagement / disengagement device 54, as shown in FIGS. 12 (a) and 12 (b). Further, the engaging protrusion 71 ″ on the outer periphery of the rotating body 70 ″ does not engage with the braking rotating body 81 of the damper means 80. Therefore, the lever member 52 moves forward smoothly and pushes the operating body 44 without receiving resistance by the damper means 80. Therefore, the brake mechanism 42 is released from the braking state with almost no delay, and the opening / closing body 10 starts the closing operation.
That is, even if the amount of bending of the slack a21 of the second string-like member a2 is insufficient with respect to the amount by which the lever member 52 of the automatic closing device 50 moves from the return position to the advanced position, the shortage is insufficient. Can be tolerated to a certain amount, and consequently, the start of the closing operation of the opening / closing body 10 due to the closing command can be prevented from being delayed.

  Further, when the lever member 52 moves backward from the forward movement position due to the obstacle detection, as shown in FIGS. Engage with the brake rotator 81. At this time, the damper rotator 81 rotates in the direction in which the damper means 80, which is a one-way damper device, does not generate resistance. Therefore, it is possible to prevent the operation of the brake mechanism 42 and the stop of the closing operation of the opening / closing body 10 from being delayed.

  When the obstacle is removed, the lever member 52 moves forward from the position shown in FIG. 12C to the position shown in FIG. 12B. At this time, the engagement of the rotating body 70 ″ is performed. Since the protrusion 71 ″ receives resistance from the braking rotator 81 of the damper means 80, the advancement of the lever member 52 is delayed. Therefore, the restart of the closing operation of the opening / closing body 10 can be delayed after the obstacle removal.

  Moreover, in the said embodiment, the traction apparatus 60 should just be a mechanism which pulls the 1st string-like member a1 by suitable urging | biasing force, For example, it seems to pull the 1st string-like member a1 with the weight of a weight. It is possible to replace it with a mechanism that is adapted to pull the first string-like member a1 by the urging force of the coil spring.

  In the above embodiment, the means for adjusting the height of the case member 91 is not limited to the illustrated example. For example, a bolt fixed to one of the case member 91 and the opening / closing body 11 is used. An embodiment in which the nut member is inserted into the other side and a double nut is screwed to the bolt to fix the height position of the case member 91, or the case member 91 is slidably engaged with the open / close body 11 so as to be slidable in the vertical direction. In addition, it is possible to adopt an aspect in which locking is possible at an arbitrary height position.

Further, according to the above embodiment, a general rotary damper device is used as the damper means 80 (or 80 ′), but as another example, a torque limiter or an electric motor is used as the damper means 80 (or 80 ′). You may make it use.
A DC motor is preferably used as the electric motor, a resistor is electrically connected between its terminals, and the output shaft is engaged with the rotating body 70 (or 70 ′, 70 ″). The electric motor acts as a generator and can provide rotational resistance to the rotating body 70 by the output shaft, and as a more preferable aspect, the resistor is a variable resistance, and the rotational resistance is adjusted by adjusting the resistance. It may be.

  Further, in the embodiment in which the motor unit 41 is provided in the switch 40 as in the illustrated example, the rotation of the rotating bodies 70, 70 ', 70 "in one direction (counterclockwise in the illustrated example) is a contact switch. Until the rotating bodies 70, 70 ', 70 "rotate in the reverse direction and return to their original positions, or drive power for both opening and closing of the switch 40, or driving only for closing. The power may be cut off. At this time, the power supply for releasing the brake is simultaneously cut off.

  Further, the automatic closing device 50 is not limited to the illustrated example as long as it has the operation principle shown in the above-described embodiment, and may be in another mode. As other examples of the automatic closing device, it is possible to adopt a mode in which the return operation can be performed electrically, a mode in which the switch 40 is built in, or the like.

  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 sensing signal, and sensing the rise of the movable seat plate 12 by means of a tape switch in the guide rail It is also possible to use together a means for electrically transmitting a signal, a means for non-contact detection of an obstacle by a photoelectric sensor or the like.

  Further, according to the above embodiment, the opening / closing body 10 can be slightly closed during the time lag from when the movable seat 12 contacts the obstacle X until the opening / closing body 10 stops, but the movable seat 12 can be moved. The stroke is preferably longer than the closing distance of the opening / closing body 10 between the time lags. According to this configuration, when the opening / closing body 10 contacts the obstacle X, it is possible to prevent the weight of the opening / closing body main body 11 from being applied to the obstacle X.

  In the illustrated opening / closing device 1, the opening / closing body 10 is wound up or fed out by the upper winding shaft 32. However, as another example, the opening / closing body 10 is stored upward without being wound up. It is also possible to adopt a mode of extending from above.

  Further, according to the above embodiment, a shutter curtain formed by connecting a plurality of slats as an example of the opening / closing body 10 is shown. However, as another example of the opening / closing body 10, a plurality of pipes are connected in the opening / closing direction. Or a combination of one or more panels, sheets or nets in the opening / closing direction, or a combination of slats, panels, pipes, sheets, nets, etc. It is possible to set it as an aspect.

  In the above embodiment, the upward and downward movements of the movable seat plate 12, the first movable member 94, and the second movable member 95 mean upward and downward movements relative to the opening / closing body main body 11.

  DESCRIPTION OF SYMBOLS 1: Opening / closing device, 10: Opening / closing body, 11: Opening / closing body main body, 12: Movable seat board, 40: Opening / closing machine, 42: Brake mechanism, 42c: Biasing member, 44: Operating body, 50: Automatic closing device, 52 : Lever member, 53: urging member, 54: engagement / disengagement device, 60: traction device, 70: rotating body, 71a: engagement portion, 72: engaged portion, 73: elastic member, 80: damper means, 81 : Braking rotator, 90: Tension raising mechanism, 91: Case member, 92, 93: Pulley member, 93a, 93b: Guide member, 94: First movable member, 94a: Concavity and convexity, 94b: Restriction protrusion, 94c: Projection, 95: Second movable member, 95a: Concavity and convexity, 95b: Projection, 95d: Weight, 96: First movable member urging member, A: Seat plate interlocking mechanism, a1: First string member , A2: second string member, a21: slack, X: obstacle

Claims (4)

An opening / closing body body capable of closing its own weight while sliding, a movable seat plate connected to the lower end of the opening / closing body body and movable upward relative to the opening / closing body body, and an end in the width direction of the opening / closing body body A guide rail that surrounds and guides the opening / closing direction, a brake mechanism that brakes or releases the closing operation of the opening / closing body, and a brake mechanism that is released from the braking state in response to a closing command. An opening / closing device comprising: an automatic closing device that performs the above-described movement, and a seat plate interlocking mechanism that shifts the brake mechanism from a released state to a braking state in conjunction with the upward movement of the movable seat plate,
The brake mechanism is configured to be in a release state from a braking state by pushing the operating body forward against the urging force of the urging member,
The automatic closing device includes a lever member capable of moving forward and backward between a forward position where the operating body is pushed and a return position retracted to the original state, and a biasing member which biases the lever member in the forward direction. An engaging / disengaging device that locks the lever member when retracted at the return position and releases the locking state in response to a closing command;
The seat plate interlocking mechanism delays the advancement of the lever member by the resistance of the damper means when the lever member moves forward from the return position, and the lever member moves when the lever member moves forward from the return position. Do not receive the resistance by the damper means ,
The seat plate interlocking mechanism pulls the tension raising mechanism that raises the tension of the first string-like member by the upward movement of the movable seat plate and the first string-like member whose tension is increased by the tension raising mechanism. A rotating body provided to rotate in one direction and a second end provided to be attached to the outer peripheral side of the rotating body and to pull the lever member toward the return position side by the other end side. An opening / closing device comprising: a string-like member; and the damper means that engages with the rotating body and provides resistance to rotation of the rotating body in a direction opposite to the one direction . 2. The switchgear according to claim 1, wherein the second string-like member is connected to the lever member at the return position in a slack state . The opening / closing apparatus according to claim 2 , wherein the slack of the second string-like member is adjusted so as to be substantially eliminated when the lever member moves from the return position to the forward movement position . The tension raising mechanism includes two pulley members supported by the opening / closing body main body so as to be separated from each other in the width direction of the opening / closing body, hung on the lower side of these two pulley members, and both ends are pulled upward. The first string member and the first string member supported by the opening / closing body main body so as to move in the vertical direction relative to the opening / closing body body on the upper side between the two pulley members of the first string member. The movable member and the first string-like member are supported by the opening / closing body main body so as to move in the vertical direction relative to the opening / closing body main body on the lower side between the two pulley members, and are movable from the lower side. A second movable member provided so as to be pushed by a seat plate; and a first movable member urging member for urging the first movable member downward, and facing the opening / closing body main body. As the movable seat plate moves upward The first string-like member is sandwiched between the two movable members and pulled upward, and the tension rises, and the both movable members are moved along with the downward movement of the movable seat plate relative to the opening / closing body body. The switchgear according to any one of claims 1 to 3 , wherein the opening and closing device is in a tension relaxation state in which a gap is widened to loosen the tension of the first string-like member .

Images