JP2007077712A - Opening-closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an opening-closing body from being closed by looseness of an endless ring-shaped motive power transmission member with a relatively inexpensive part constitution superior in productivity. <P>SOLUTION: This opening-closing device operates the opening-closing body 10 by torque of a driven shaft 32 by transmitting the torque of a driving shaft 37a to the driven shaft 32 by the endless ring-shaped motive power transmission member 38 ranging over the driven shaft 32 and the driving shaft 37a; and has a regulating member 39 arranged so as to move up to a regulating position for regulating rotation of the driven shaft 32 by engaging with the driven shaft 32 from an unregulable position without regulating the rotation of the driven shaft 32, an energizing means energizing the regulating member 39 in the engaging direction and a holding member 36 holding the regulating member 39 in the unregulable position; and moves the regulating member 39 up to the regulating position by energizing force of the energizing means by releasing a holding state of the holding means 36 to the regulating member 39 by interlocking with looseness of the endless ring-shaped motive power transmission member 38. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a shutter device including a screen shutter device, an overhead door shutter device, a roll screen device, a blind, an awning device, etc., and an open / close device that opens and closes an open / close body. The present invention relates to an opening / closing device in which an opening / closing body is operated by power transmitted by a member.

Conventionally, this type of invention includes an opening / closing body (shutter curtain 1) that partitions and opens a space by opening and closing in the vertical direction, and a winding shaft (drum 14) that feeds and winds the opening / closing body. ), A drive device (motor 3 with speed reducer) for rotating the drive shaft (power gear 4), and an endless ring-shaped power transmission member hung so as to transmit the rotational force of the drive shaft to the winding shaft Some have (power transmission chain 5).
According to this prior art, when the endless ring-shaped power transmission member is cut off due to corrosion, deterioration, vibration, or the like, or detached from the driven shaft or the driven shaft on the winding shaft side, etc., There is a possibility that the winding shaft can be freely rotated. In this case, the opening / closing body is closed by its own weight regardless of whether or not it is operated.
Further, in the prior art, when the configuration is such that the rotational force of the driving device is transmitted to the winding shaft by a belt and a pulley, the belt loosens in addition to the case where the belt is cut or detached. Even in such a case, the winding shaft may freely rotate, and the opening / closing body may be closed by its own weight.
Therefore, as in the invention described in Patent Document 2, the engaging members (42, 42 ') are connected to the take-up shaft (30) and the interlocking member in conjunction with loosening or cutting of the endless ring-shaped power transmission member (70). There is an opening / closing device that meshes with an engaged member (34) that is integral with the driven shaft (31) and regulates the rotation of the winding shaft (30) and the driven shaft (31).

However, according to the latter invention, the rotation of the take-up shaft (30) and the driven shaft (31) having relatively high weight and inertial force is applied to the engaging members (42, 42) with respect to the engaged member (34). Since it is stopped by the engagement of '), it is necessary to make the engaging members (42, 42') have a robust structure in consideration of a strong impact at the time of the engagement. There was a risk of rising costs.
Japanese Patent Laid-Open No. 2002-155585 JP 2005-188236 A

  The present invention has been made in view of the above-mentioned conventional circumstances, and the subject of the present invention is that the opening / closing body is caused by looseness of the endless ring-shaped power transmission member due to a relatively low-cost component configuration with good productivity. An object of the present invention is to provide an opening / closing device that can be prevented from being unintentionally closed without being operated.

  In order to solve the above problems, the first invention is to transmit the rotational force of the drive shaft to the driven shaft by an endless ring-shaped power transmission member extending between the driven shaft and the drive shaft, and operate the opening / closing body by the rotational force of the driven shaft. In the opening and closing device configured as described above, a regulating member provided to move from an unregulatable position that does not regulate the rotation of the driven shaft to a regulated position that engages the driven shaft and regulates the rotation of the driven shaft; An urging means for urging the regulating member in the engaging direction; and a holding member for holding the regulating member at the unregulatable position, and in conjunction with loosening of the endless ring-shaped power transmission member, The holding state of the holding member is released, and the restriction member is moved to the restriction position by the urging force of the urging means.

Here, the opening / closing device according to the present invention is used so that the opening / closing body performs only the closing operation (for example, a fire shutter device), and the opening / closing body performs both the opening operation and the closing operation. Including embodiments.
Further, in this opening / closing device, the opening / closing body is wound by the winding shaft on the opening direction side, and the mode in which the opening / closing body is fed out from the winding shaft, or the opening / closing body is wound on the storage portion on the opening direction side. The mode etc. which were stored without paying out and paying out from the storage part are included.

  The opening / closing body includes an aspect in which a plurality of slats and pipes are continuously provided in the opening / closing direction, an aspect in which one or more panels, a sheet-like object, and a net-like object are provided in the opening / closing direction, or a slat. , A panel, a pipe, a sheet-like material, a net-like material, or the like.

In addition, the configuration of “endless ring-shaped power transmission member extending between the driven shaft and the drive shaft” includes a mode in which the endless ring-shaped power transmission member is directly wound around the driven shaft and the drive shaft, It includes a mode in which an endless ring-shaped power transmission member is wound around a rotating body fixed coaxially and a rotating body fixed substantially coaxially with respect to the drive shaft.
The endless ring-shaped power transmission member includes a chain, a belt, and the like.

The driven shaft is a member that is supported so as to rotate in order to operate the opening / closing body, and is a member that transmits a rotational force from the drive shaft via the endless ring-shaped member. I just need it.
As a specific example of the driven shaft, there is a driven shaft that is fixed substantially coaxially to the winding body in an opening / closing device that includes a winding body that winds or unwinds the opening / closing body.
Further, as another specific example of this driven shaft, in an opening / closing device adapted to house the opening / closing body without winding it, a rack-like member provided integrally with the opening / closing body over the opening / closing direction of the opening / closing body, There is a driven shaft that includes a pinion-like member that rotates by engaging with the rack-like member, and is fixed substantially coaxially to the pinion-like member. In this case, the rack-shaped member may be a member provided separately on the opening / closing body, or uses an uneven portion provided on the surface of the opening / closing body, such as the back surface of the opening / closing body composed of a plurality of slats. It may be.
Furthermore, as another specific example of this driven shaft, in an opening / closing apparatus provided with a string-like member that pulls the opening / closing body in the opening direction or the closing direction, and a rotating body that winds or feeds the string-like member, Examples include a driven shaft fixed substantially coaxially with respect to the rotating body.

The drive shaft is preferably a drive shaft of an electric motor, but a drive shaft of an air motor, a drive shaft that rotates by the weight of a weight body, a drive shaft that is rotated by a manual operation on a handle, etc., It is good also as a drive shaft etc. of another rotation mechanism.
Further, the drive shaft may be a drive shaft that can be braked by a brake device (for example, a brake device mounted on a motor, a governor device, a retractor, or the like).

In addition, the restriction member includes an aspect in which it slides and moves from the unregulatable position to the restriction position, an aspect in which the restriction member moves from the unregulatable position to the restriction position, and the like.
The restricting member includes an aspect that directly or indirectly slides on the driven shaft at the restricting position, an aspect that directly or indirectly meshes with the driven shaft, and the like.

The unregulatable position means that the restricting member is in a position where the rotation of the driven shaft is not restricted. Specifically, for example, the restricting member is placed on the driven shaft or the driven shaft. And a position separated from the integral member.
The restriction position means that the restriction member is in a position where the rotation of the driven shaft is restricted. Specifically, for example, the restriction member is integrated with the driven shaft or the driven shaft. What is necessary is just to set it as the position which made it mesh | engaged with respect to the various member, the position made to contact.

  The urging means may be configured to urge the regulating member in a direction in which the regulating member is engaged with the driven shaft or a member integral with the driven shaft. It includes an aspect in which an elastic force such as an elastic body or a tensile force is used, an aspect in which the weight of the regulating member itself or a weight body is used, and the like.

  Further, the holding member has a mode in which the holding state with respect to the restriction member is released by a rotational movement that is interlocked with the looseness of the endless ring-shaped power transmission member, or a slide that is interlocked with the looseness of the endless ring-shaped power transmission member. The mode etc. which cancel | release the holding state with respect to a control member are included.

  In addition, the looseness of the endless ring-shaped power transmission member includes looseness due to cutting of the endless ring-shaped power transmission member, looseness due to dropping of the endless ring-shaped power transmission member, and the like.

  Further, the second invention is characterized in that a restricting member when moving from the unregulatable position to the restricting position is engaged between the outer peripheral side of the driven shaft and a non-moving part.

Here, “the outer peripheral side of the driven shaft” includes the outer peripheral surface of the driven shaft, the outer peripheral surface of the member on the outer peripheral side of the driven shaft, and the like.
The immovable part may be an immovable part relative to the rotating driven shaft. Examples of the immovable part include a housing that is an installation target of the opening / closing device and a bracket that supports the driven shaft. And a guide rail for guiding the opening / closing body in the opening / closing direction.

  According to a third aspect of the invention, a driven rotator is provided on the outer periphery of the driven shaft to hang the endless ring-shaped power transmission member, and the driven rotator is integrally engaged with the driven rotator on the axial direction side of the driven rotator. A rotating body is provided, and the regulating member is engaged with the engaging rotating body to regulate the rotation of the driven shaft.

  According to a fourth aspect of the invention, a driven rotator is provided on the outer periphery of the driven shaft to hang the endless ring-shaped power transmission member, and the restricting member is engaged with the endless ring-shaped power transmission member and / or the driven rotator. In combination, the rotation of the driven shaft is restricted.

  The fifth invention is characterized in that, as the urging means, the restricting member is moved from the unregulatable position to the restricting position by its own weight.

  In the sixth invention, the holding member is provided so as to contact the endless ring-shaped power transmission member in a crossing direction in a state where the regulating member in the unregulatable position is locked. The holding state of the restricting member at the unregulatable position is released by movement in the intersecting direction when the annular power transmission member is loosened.

  In the seventh invention, the holding member abuts one end side portion in the crossing direction with respect to the endless ring-shaped power transmission member, and locks the regulating member by the other end side portion. The other end is pivotally supported so as to be freely rotatable.

  In the eighth invention, the holding member is in contact with the endless ring-shaped power transmission member from above.

Since the present invention is configured as described above, the following effects can be obtained.
According to the first invention, when the endless ring-shaped power transmission member is loosened due to cutting or dropping off, the holding state of the holding member with respect to the regulating member is released in conjunction with the loosening, and the regulating member is attached. It moves to the restriction position by the urging force of the urging means, engages with the driven shaft, and restricts the rotation of the driven shaft.
Therefore, it is possible to prevent the opening / closing body from being unintentionally closed without being operated due to the looseness of the endless ring-shaped power transmission member.
In addition, since only the restricting member that engages with the driven shaft needs to have a robust structure, it is possible to obtain a component configuration that is good in productivity and relatively low in cost.

  Furthermore, according to the second invention, since the restricting member is engaged between the outer peripheral side of the driven shaft and the non-moving portion by the rotational force of the driven shaft, a small, low-cost and simple structure is controlled. By the member, a relatively large regulating force can be applied to the driven shaft.

  Further, according to the third and fourth inventions, since the restricting member is indirectly engaged with the driven shaft, the driven shaft is damaged by an impact or the like when the restricting member is engaged. In addition, the engagement structure can be a simple and low-cost configuration.

  Furthermore, according to the fifth aspect, the structure for urging the regulating member can be a simple and low-cost configuration.

  Furthermore, according to the sixth aspect, looseness of the endless ring-shaped power transmission member can be sensed by a simple structure, and the holding state at the unregulatable position by the regulating member can be released.

  Furthermore, according to the seventh invention, the structure for releasing the locking state between the holding member and the regulating member in conjunction with the endless ring-shaped power transmission member can be made into a specific and highly productive structure. .

Furthermore, according to the eighth aspect, it is possible to improve the operability of the holding member when sensing the looseness of the endless ring-shaped power transmission member.
That is, if the holding member is configured to contact the endless ring-shaped power transmission member in the crossing direction from the lower side, for example, when the endless ring-shaped power transmission member is loosened without being cut, the loosening is performed. However, since the weight of the endless ring-shaped power transmission member is added to the holding member, the weight may hinder the movement of the holding member.
However, according to the present invention, since the holding member is configured to abut against the endless ring-shaped power transmission member from above the crossing direction, even if the endless ring-shaped power transmission member is loosened without being cut, The holding member can be moved so as to follow the downward slack of the endless ring-shaped power transmission member due to the loosening.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
An example of the switchgear according to the present embodiment is disposed in an opening of a construction / structure such as a house, building, warehouse, factory, underground shopping center, tunnel, vehicle loading platform, etc., or inside the construction / structure. It will be described as a so-called shutter device that opens and closes a part and partitions or opens a space inside a construction / structure.

  The opening / closing device 1 includes an opening / closing body 10 for partitioning and opening a space, guide rails 20 and 20 for guiding the opening / closing body 10 in an opening / closing direction (vertical direction according to FIG. 1), and extending the opening / closing body. And a winding device 30 that winds up, and the rotational force of the drive shaft 37a is transmitted to the driven shaft 32 by an endless ring-shaped power transmission member 38 that is hung on the driven shaft 32 and the drive shaft 37a in the winding device 30. The opening / closing body 10 is configured to open / close by the rotational force of the driven shaft 32.

  The opening / closing body 10 is formed by connecting a plurality of so-called slats (not shown) formed by bending a horizontally-long substantially rectangular metal plate so as to rotate between the adjacent slats. Thus, both end sides in the left-right direction are guided in the opening / closing direction (up-down direction according to FIG. 1) by the left and right guide rails 20.

  The guide rail 20 is a member that is processed from a rigid material such as a metal material into a substantially U-shaped cross section that surrounds the widthwise end of the opening / closing body 10, and is formed on each end of the opening / closing body 10 in the width direction. Arranged.

  Further, as shown in FIG. 3, the winding device 30 includes a shaft support bracket 31 fixed to a housing a such as a building above the opening / closing body 10, and the shaft support bracket 31 and the shaft support bracket 31. A driven shaft 32 supported rotatably with respect to the surface of the bracket 31, a rotation drive source 37 that is fixed to the shaft support bracket 31 and rotates the drive shaft 37a and the drive rotating body 37b, a drive rotating body 37b, and a driven rotating body. 34, an endless ring-shaped power transmission member 38 wound around 34, and a regulating member 39 that regulates the rotation of the driven shaft 32 when the endless ring-shaped power transmission member 38 is loosened.

  The pivot bracket 31 is formed by bending the peripheral side of the metallic member for reinforcement or the like, and is fixed substantially perpendicular to the housing a surface. A through hole is formed on the center side of the pivot bracket 31, and the end side portion of the driven shaft 32 is inserted through the through hole.

The driven shaft 32 is a shaft body or a tube body that is slightly longer than the entire length in the width direction of the opening / closing body 10, and an end portion in the axial direction is loosely inserted into the shaft support bracket 31, and the shaft is interposed via a bearing member such as a bearing. It is supported by the support bracket 31.
A winding body 33 is fixed to the axial center side of the driven shaft 32, a driven rotating body 34 and an engaging rotating body 35 are fixed to the axial end portion of the driven shaft 32, and A holding member 36 is rotatably supported on the end surface of the driven shaft 32.

  The winding body 33 is a cylindrical or eaves-like member that extends over substantially the entire length in the width direction of the opening / closing body 10, and an opening-side end of the opening / closing body 10 is fixed to the outer peripheral surface thereof.

  Further, the driven rotor 34 is a sprocket according to an example of the present embodiment, and is fixed substantially coaxially to the end side of the driven shaft 32.

  Further, the engaging rotator 35 is a substantially gear-shaped member having a concavo-convex portion 35 a for meshing with the regulating member 39 around the engaging rotator 35, and is fixed to the end side further than the driven rotator 34 in the driven shaft 32. Yes.

The holding member 36 has its one end side abutted against the endless ring-shaped power transmission member 38 from the lower side in the intersecting direction, and the other end side portion locks the regulating member 39 so that these one end side and the other end The space between the two is a member that is rotatably supported with respect to the end surface of the driven shaft 32.
More specifically, the holding member 36 includes a main body portion 36a having a front end bent into a substantially L shape or a substantially V shape, and a engaged member disposed on the most distal side of the main body portion 36a. The stop portion 36b and a contact portion 36c disposed on the rearmost end side of the main body portion 36a are configured such that a portion closer to the contact portion 36c than the center of gravity is rotatable with respect to the end surface of the driven shaft 32. (See FIGS. 1 and 2).
Therefore, according to the above-described configuration, when the holding member 36 is released from the engagement state with the regulating member 39 described later, the held portion 36b is rotated downward and the contact portion 36c is rotated by the weight balance. Rotate upward (see FIG. 2).
In the illustrated example, the holding member 36 is rotated by weight balance as described above. However, as another example, the biasing force of a biasing member (for example, a spring, a leaf spring, or an elastic body) is used. The holding member 36 may be rotated in the above direction.

The locked portion 36b is formed so as to receive a locking shaft portion 39b of a regulating member 39, which will be described later, from the lower side, and according to the illustrated example, it has a shape in which the tip side is bent toward the driven shaft 32 side.
The abutting portion 36c is a roller that is pivotally supported with respect to the main body portion 36a, and an outer peripheral surface thereof abuts on the inner side of the endless ring-shaped power transmission member 38.

The rotational drive source 37 is an electric motor capable of rotating the drive shaft 37a in both directions by being controlled by a control circuit (not shown), and a drive rotation that is a sprocket is provided at the tip side of the drive shaft 37a. The body 37b is fixed substantially coaxially.
The rotation drive source 37 is fixed to the shaft support bracket 31 while maintaining the drive shaft 37 a substantially parallel to the driven shaft 32.

  Further, the endless ring-shaped power transmission member 38 is a chain according to a preferred example of the present embodiment, and the drive rotating body 37b on the distal end side of the drive shaft 37a so as to transmit the rotational force of the drive shaft 37a to the driven shaft 32. And a driven rotating body 34 on the distal end side of the driven shaft 32.

  According to the above embodiment, the driven rotator 34, the drive rotator 37b, and the endless ring-shaped power transmission member 38 are used as a power transmission mechanism using a sprocket and a chain, but are replaced with a power transmission mechanism using a belt and a pulley. It is also possible to do.

The restricting member 39 slides from an unregulatable position that does not restrict the rotation of the driven shaft 32 to a restricting position that indirectly engages the driven shaft 32 and restricts the rotation of the driven shaft 32. It is a member provided in this way.
More specifically, the regulating member 39 includes a main body 39a that can be engaged with and disengaged from the engaging rotating body 35 around the driven shaft 32, and a locking shaft 39b that is integral with the main body 39a. It is configured to be guided in the vertical direction by the two guide members 40 and 39d.

When the main body 39a moves from the unregulatable position to the restricting position, the main body 39a is engaged between the engaging rotator 35 on the outer peripheral side of the driven shaft 32 and the guide member 40 that is an immobile part. According to a preferred example of the present embodiment, the concavo-convex portion 39a1 (see FIG. 1) is formed in a substantially wedge shape and fits with the concavo-convex portion 35a of the engaging rotator 35 on the surface facing the engaging rotator 35. ).
The locking shaft portion 39b is a shaft-like convex portion that protrudes substantially perpendicularly from the main body portion 39a, and is inserted into the other guide member 50 described later, and its distal end portion is located at the unregulatable position. It is received by the locked portion 36 b of the holding member 36.

The one guide member 40 is a substantially plate-like member that is substantially orthogonal to the main body 39a of the restricting member 39 and extends in the sliding direction of the restricting member 39, and is supported along the housing a such as a building. It is fixed to the bracket 31.
The guide member 40 includes a guide groove 41 (see FIG. 3) for guiding the slide of the restriction member 39, and the end of the main body 39 a of the restriction member 39 is fitted into the guide groove 41.
The length of the guide groove 41 is appropriately set so that the restricting member 39 is slid between the unregulatable position and the restricting position.

  According to the preferred example shown in the drawing, as described above, the weight of the regulating member 39 itself is used as the means for urging the regulating member 39 in the engaging direction. The regulating member 39 may be urged in the engaging direction by the urging force of the urging member such as the elastic body or the like. Is possible.

The other guide member 50 is a substantially plate-like member extending in the sliding direction of the restricting member 39 so as to engage with the locking shaft portion 39 b of the restricting member 39, and is fixed to the pivot support bracket 31. .
The guide member 50 is provided with a substantially elongated guide hole 39d1 through which the locking shaft portion 39b is inserted and the locking shaft portion 39b can be slid in a vertical direction by a predetermined amount.

Thus, according to the opening / closing device 1 configured as described above, when the opening / closing body 10 is normally opened / closed, as shown in FIG. 1, the abutting portion 36 c of the holding member 36 has the endless ring-shaped power transmission member 38. The portion between the driven rotator 34 and the drive rotator 37b on the inner side of the shaft contacts the crossing direction from the lower side.
Therefore, the holding member 36 is held so as not to rotate due to the contact, and receives the locking shaft portion 39b of the regulating member 39 by the locked portion 36b on the opposite end side.
Therefore, the locking shaft portion 39b is held at an unregulatable position separated from the engaging rotator 35.

If the endless ring-shaped power transmission member 38 is cut or loosened, the abutting portion 36c may rotate upward so as to pass through the cut portion of the endless ring-shaped power transmission member 38 ( 2), the abutting portion 36c loosens the endless ring-shaped power transmission member 38, or the like.
For this reason, the holding member 36 rotates in a direction in which the contact portion 36c is moved upward, and due to the rotation, the locked portion 36b is not positioned below the locking shaft portion 39b.
Therefore, the regulating member 39 that has lost its support by the locking shaft portion 39b slides downward due to its own weight, and the main body portion 39a is bitten like a wedge between the engaging rotator 35 and the guide member 50, and The uneven portion 39a1 of the main body portion 39a is engaged with the uneven portion 35a of the engaging rotator 35.
At this time, the engaging rotator 35 tries to rotate due to the weight of the opening / closing body 10 applied to the winding body 33, and the main body 39 a of the restricting member 39 extends along the rotating direction of the engaging rotator 35, the guide member 50, and so on. Therefore, the main body 39a can be prevented from being repelled by the rotating rotating body 35 for rotation.

  Therefore, the driven shaft 32 and the winding body 33 integral with the engaging rotator 35 are maintained in a stationary state, and as a result, the opening / closing body 10 is not operated due to looseness of the endless ring-shaped power transmission member 38 or the like. It can be prevented from being closed unintentionally.

  Next, another example of the embodiment according to the present invention will be described. In addition, in the switchgear described below, the same reference numerals as those of the switchgear 1 are used for portions that are substantially the same as those of the switchgear 1 described above, and redundant detailed description is omitted.

The opening / closing apparatus 2 shown in FIG. 4 has a configuration in which the engaging rotating body 35 is omitted from the above-described opening / closing apparatus 1 and the restriction member 39 is replaced with a restriction member 39 ′.
The restricting member 39 ′ is configured to restrict the rotation of the driven shaft 32 by engaging with the driven rotating body 34 and / or the endless ring-shaped power transmission member 38 around the driven shaft 32.
More specifically, in the regulating member 39 ′, the main body 39 a ′ can be engaged with and disengaged from the tooth portion 34 a around the driven rotator 34, and is endlessly wound around the driven rotator 34. An uneven portion 39a1 ′ that can be engaged and disengaged with respect to the annular power transmission member 38 is also formed.

According to the opening / closing device 2, for example, as shown in FIG. 5, when the endless ring-shaped power transmission member 38 is cut at a location between the driven rotating body 34 and the driving rotating body 37b, the regulating member 39 ′ However, it engages with the endless ring-shaped power transmission member 38 around the driven rotator 34 to make the driven rotator 34 stationary. Therefore, the driven shaft 32 and the winding body 33 that are integral with the driven rotating body 34 are also stationary.
Further, for example, when the endless ring-shaped power transmission member 38 is dropped from the periphery of the driven rotator 34, the regulating member 39 ′ is directly engaged with the outer periphery of the driven rotator 34, and the driven rotator 34 is in a stationary state. To. Therefore, the driven shaft 32 and the winding body 33 that are integral with the driven rotating body 34 are also stationary.

   Further, the opening / closing device 3 shown in FIG. 6 has a configuration in which the holding member 36 in the above-described opening / closing device 1 is replaced with a holding member 36 ′, and the holding member 36 ′ is brought into contact with the endless ring-shaped power transmission member 38 from above. I try to let them.

More specifically, the holding member 36 ′ includes a main body portion 36 a ′ having a front end side bent in a substantially L shape or a substantially V shape, and a locked portion 36 b on the most distal side of the main body portion 36 a ′. 'And a contact portion 36c on the rearmost end side of the main body portion 36a, and a portion closer to the locked portion 36b' than the center of gravity thereof is rotatably supported with respect to the end surface of the driven shaft 32. Yes.
The weight balance of the holding member 36 ′ is such that when the endless ring-shaped power transmission member 38 is loosened due to cutting or dropping off, the contact portion 36 c is rotated downward following the looseness and The stopper 36b ′ is appropriately set so as to be detached from the locking shaft 39b.

  The locked portion 36b ′ is formed so as to receive the locking shaft portion 39b of the restricting member 39 from the lower side. According to a preferred example shown in the figure, the tip side is bent toward the housing a, In addition, the tip end side is inclined downward so as to be easily detached from the locking shaft portion 39b.

The abutting portion 36c is disposed so as to abut on a portion between the driven rotator 34 and the drive rotator 37b on the outer peripheral side of the endless ring-shaped power transmission member 38 from above.
As another example (not shown) of the abutting portion 36c, the abutting portion 36c abuts against the portion between the driven rotating body 34 and the driving rotating body 37b on the inner peripheral side of the endless ring-shaped power transmission member 38 from above. In this case, the shape of the main body portion 36a ′ and the like is changed.

  Further, according to the illustrated example, the guide member 40 in the opening / closing device 3 has substantially the same configuration as that of the opening / closing devices 1 and 2, but the length of the guide groove 41 is set at a position where the restriction member 39 cannot be restricted. The regulating member 39 can be moved slightly above the unregulatable position so that the to-be-latched portion 36b 'can be easily detached from the locking shaft portion 39b. The length is appropriately set.

According to the opening / closing device 3 configured as described above, for example, as shown in FIG. 7, when the endless ring-shaped power transmission member 38 drops off from the drive rotating body 37 b, the endless ring-shaped power transmission that moves downwardly and moves downwards. Following the member 38, the abutting portion 36c side of the holding member 36 'rotates downward, and the locked portion 36b' is detached from the locking shaft portion 39b of the regulating member 39.
At the time of detachment, the restricting member 39 moves slightly upward because its locking shaft portion 39b is pushed upward by the locked portion 36b ′, but after the locked portion 36b ′ is completely detached, Slide down.
Then, the regulating member 39 slid downward engages in a wedge shape between the driven rotator 34 and the guide member 50, and the uneven portion 39 a 1 of the restricting member 39 engages the uneven portion 35 a of the engaging rotator 35. The rotation of the combined rotating body 35 and the driven shaft 32, the winding body 33, the driven rotating body 34, and the like integral with the engaging rotating body 35 are stopped.

It is a principal part side view which shows an example of the switchgear concerning this invention. It is a principal part side view which shows the switchgear, and shows the state which the endless ring-shaped power transmission member cut | disconnected. It is the (III)-(III) sectional view taken on the line in FIG. It is a principal part side view which shows the other examples of the switchgear concerning this invention. It is a principal part side view which shows the switchgear, and shows the state which the endless ring-shaped power transmission member cut | disconnected. It is a principal part side view which shows the other examples of the switchgear concerning this invention. It is a principal part side view which shows the switchgear, and shows the state which the endless ring-shaped power transmission member dropped.

Explanation of symbols

1, 2, 3: Opening and closing device 10: Opening and closing member 30: Winding device 32: Driven shaft 33: Winding member 34: Driven rotating member 35: Rotating member for engagement 36, 36 ': Holding member 37: Rotation drive source 37a : Drive shaft 37b: Drive rotating body 38: Endless ring-shaped power transmission member 39: Restricting member

Claims (8)

In an opening / closing device that transmits the rotational force of the drive shaft to the driven shaft by an endless ring-shaped power transmission member extending between the driven shaft and the drive shaft, and operates the opening / closing body by the rotational force of the driven shaft,
A regulating member provided to move from an unregulatable position that does not regulate the rotation of the driven shaft to a regulated position that engages the driven shaft and regulates the rotation of the driven shaft;
Biasing means for biasing the regulating member in the engaging direction;
A holding member that holds the regulating member in the unregulatable position,
In conjunction with the loosening of the endless ring-shaped power transmission member, the holding state of the holding member with respect to the restriction member is released, and the restriction member is moved to the restriction position by the urging force of the urging means. Opening and closing device characterized.   2. The switchgear according to claim 1, wherein a restricting member for moving from the unregulatable position to the restricting position is engaged between an outer peripheral side of the driven shaft and a non-moving part. Provided with a driven rotator for winding the endless ring-shaped power transmission member around the driven shaft;
A rotating body for engagement is provided integrally with the driven rotating body on the axial direction side of the driven rotating body,
3. The switchgear according to claim 1, wherein the restricting member is engaged with the engaging rotator to restrict the rotation of the driven shaft. Provided with a driven rotator for winding the endless ring-shaped power transmission member around the driven shaft;
3. The switchgear according to claim 1, wherein the regulating member is engaged with the endless ring-shaped power transmission member and / or the driven rotating body to regulate the rotation of the driven shaft.   The switchgear according to any one of claims 1 to 4, wherein, as the biasing means, the restricting member is moved from the unregulatable position to the restricting position by its own weight.   The holding member is provided so as to contact the endless ring-shaped power transmission member in a crossing direction in a state where the regulation member in the unregulatable position is locked, and when the endless ring-shaped power transmission member is loosened The opening / closing apparatus according to claim 1, wherein the opening and closing device is configured to release the holding state of the restriction member at the unregulatable position by movement in the crossing direction.   The holding member abuts one end side portion in the crossing direction with respect to the endless ring-shaped power transmission member and locks the restricting member by the other end side portion. The switchgear according to any one of claims 1 to 6, wherein the switchgear is rotatably supported. The switchgear according to any one of claims 1 to 7, wherein the holding member is in contact with the endless ring-shaped power transmission member from above.

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