JP2006200304A - Switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening / closing device capable of reducing bending of a driven rotating body for transmitting a rotational force to a winding body.
A winding body 31 rotatably supported, and a driven rotating body 41 engaged substantially coaxially with an end portion of the winding body 31 to transmit a rotational force to the winding body 31. And an endless ring-shaped power transmission member 60 that is hung on the outer peripheral surface of the driven rotation body 41 and transmits a rotational force to the driven rotation body 41, and the winding body 31 is driven by the rotation force of the endless ring-shaped power transmission member 60. In the opening / closing device in which the opening / closing body 10 is wound or fed out by the winding body 31, the driven rotating body 41 is a portion on the centrifugal direction side of the outer peripheral surface of the winding body 31. Is supported in a freely rotatable manner by engaging the support member 42 in the circumferential direction with the support member 42 fixed to the immovable portion.
[Selection] Figure 1

Description

  The present invention is an opening / closing device that feeds an opening / closing body wound around a winding shaft and partitions the space by the opened opening / closing body, and transmits the rotational force of an endless ring-shaped power transmission member to the winding shaft. The present invention relates to a switchgear configured to do so.

Conventionally, in this type of invention, as described in Patent Document 1, the rotational force of the electric motor (8) is driven by a drive sprocket (9), a chain (10), a driven rotating body (driven sprocket 11), and the like. There is one in which a shutter slat (5) is wound around the outer peripheral surface of a rotating winding drum (7) which is transmitted to the winding drum (7) via a power transmission mechanism (1) comprising the following.
The structure of this prior art will be described in more detail. The driven rotating body (driven sprocket 11) is made of a synthetic resin material, and is integrally provided with a bearing (13) at the center thereof. Is supported by the outer peripheral surface of the receiving shaft (20) fixed to the shutter case (6), so that it can be rotated.
The winding drum (7) rotatably supports a plurality of foils (22) on an outer peripheral surface of a fixed shaft (21) fixed to the receiving shaft (20), and these foils (22) are supported. It was comprised by connecting with a support rod (23).

  However, according to the above prior art, since the tension of the chain (10) is applied to the driven rotating body (driven sprocket 11), the driven rotating body (driven sprocket 11) made of a synthetic resin material is Deflection occurs due to the tension. Therefore, due to the bending, the durability of the driven rotator (driven sprocket 11) or the chain decreases, vibration or noise accompanying the rotation of the driven rotator (driven sprocket 11) or the chain increases, etc. There was a risk.

As another conventional technique, in a manual opening / closing type opening / closing device, like the one described in Patent Document 2, the winding fixing shaft (5) is fixed to the shutter box (3) via the bracket (9). I am doing so. When such a manually openable switchgear is improved to an electrically driven switchgear as in the prior art, the bracket (9) must be removed and the driven sprocket or the like provided. Therefore, improvement in workability is desired.
JP-A-8-326451 Japanese Utility Model Publication No. 4-6494

  The present invention has been made in view of the above-described conventional circumstances, and a problem to be solved by the present invention is to provide an opening / closing device capable of reducing the bending of a driven rotating body for transmitting a rotational force to a winding body. It is in.

  In order to solve the above-mentioned problems, a first invention is to engage a winding body rotatably supported and a substantially coaxial engagement with an end of the winding body to transmit a rotational force to the winding body. And an endless ring-shaped power transmission member that is hung on the outer peripheral surface of the driven rotation body and transmits a rotational force to the driven rotation body, and the winding body is rotated by the rotational force of the endless ring-shaped power transmission member. In the opening / closing apparatus in which the opening / closing body is wound up or drawn out by the winding body, the driven rotating body is configured to move the portion on the centrifugal direction side from the outer peripheral surface of the winding body to the stationary part. By being engaged with the supporting member fixed to the circumferential direction in the circumferential direction, it is supported rotatably.

  Here, the opening / closing device according to the present invention may be any opening / closing device configured to transmit the rotational force of the endless ring-shaped power transmission member to the winding body via the driven rotating body. Is a mode in which the rotational force of a driving source such as a motor is transmitted to the winding body via the endless ring-shaped power transmission member and the driven rotating body, or an endless ring-shaped power transmission member that is rotated by manual operation. The aspect etc. which transmitted a rotational force to the said winding body via the said driven rotary body are included.

  Further, as a preferable specific example of the opening / closing body, a mode in which a plurality of slats and pipes are continuously provided in the opening / closing direction, or one or a plurality of panels, curtains, and nets are provided in the opening / closing direction. Aspects, or a mode in which slats, panels, pipes, curtains, nets, etc., are appropriately combined.

  Further, the winding body is integrally fixed to the outer peripheral surface of the rotating shaft that is rotatable with respect to the stationary part or the aspect that is rotatably supported on the outer peripheral surface of the fixed shaft that is fixed to the stationary part. And the like.

  In the driven rotor and the endless ring-shaped power transmission member, the driven rotor is configured by a sprocket and the endless ring-shaped power transmission member is configured by a chain, and the driven rotor is configured by a pulley. The aspect etc. which comprised the said endless ring-shaped power transmission member with the belt are included.

  The immobile part is a part that does not move or rotate, such as an opening / closing body or a take-up shaft, and a specific example of the immovable part is a storage case for storing the opening / closing body. And a frame, a casing to which the opening / closing device is to be installed, and other immovable members.

Further, in the configuration in which the driven rotator is rotatably supported by the support member, both the driven rotator and the support member are provided with annular protrusions protruding in the axial direction, and the driven rotation is performed. An aspect in which the annular protrusion of the support member is disposed on the inner peripheral surface side of the annular protrusion of the body, or an annular protrusion of the support member is disposed on the outer peripheral surface side of the annular protrusion of the driven rotating body. And a mode in which the driven rotating body and the support member are engaged in a concavo-convex shape in the circumferential direction.
Further, the location where the driven rotator and the support member are engaged may be only on one side of the driven rotator in the axial direction or on both sides of the driven rotator in the axial direction.

  Moreover, in 2nd invention, the engaging location of the said driven rotary body and the said supporting member is arrange | positioned in the vicinity of the outer peripheral surface in the said driven rotary body.

  The third invention is characterized in that engagement portions between the driven rotator and the support member are provided on both sides in the axial direction of the driven rotator.

  Further, in the fourth invention, the driven rotating body includes an annular protrusion that protrudes in the axial direction and extends in the circumferential direction, and the annular protrusion is engaged with the support member in the circumferential direction. It is characterized by being rotatably supported.

  In the fifth invention, the support member is provided so as to receive the annular protrusion from the inner peripheral surface side.

  In the sixth invention, the support member is positioned between the widthwise end of the opening / closing body wound around the winding body and the endless ring-shaped power transmission member hung on the driven rotating body. The cover portion is integrally provided.

  According to a seventh aspect of the present invention, there is provided a fixed shaft that rotatably supports the winding body on its axial center side, and a fixed bracket that supports the end of the fixed shaft in a non-rotatable manner and is fixed to a stationary part. And a through hole penetrating in the axial direction is provided on the center side of the driven rotating body and the support member so as to allow the fixing bracket to be inserted therethrough.

In the present specification, the “opening / closing direction of the opening / closing body” means the direction in which the opening / closing body opens and closes.
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 is not the thickness direction of the opening / closing body.

Since the present invention is configured as described above, the following effects can be obtained.
According to the first aspect of the invention, when the endless ring-shaped power transmission member rotates, the driven endless rotating power transmission member is rotated to rotate the driven rotating body, and the winding body is rotated along with the rotation of the driven rotating body. Rotate.
During the rotation, the driven rotating body is pulled by the endless ring-shaped power transmission member from a direction substantially intersecting the axial direction, but is supported at a site on the centrifugal direction side from the outer peripheral portion of the winding body, and thus the axial direction Are less likely to bend or play. As a result, the durability of the driven rotator can be improved, and vibrations and noises associated with the rotation of the driven rotator and the endless ring-shaped power transmission member can be reduced.

  Further, according to the second invention, the engagement portion between the driven rotator and the support member is located in the vicinity of the outer peripheral surface of the driven rotator, that is, in the vicinity of the annular power transmission member. Therefore, it is possible to effectively reduce the bending or backlash of the driven rotor due to the tension of the annular power transmission member.

  Furthermore, according to the third aspect of the invention, since both sides of the driven rotator in the axial direction are supported by the support members, it is possible to further reduce the bending and backlash of the driven rotator.

  Furthermore, according to the fourth invention, the engagement structure between the driven rotator and the support member can be a simple and highly specific structure, and the annular protrusion reinforces the driven rotator. Therefore, it is possible to further reduce the bending or backlash of the driven rotating body.

  Furthermore, according to the fifth invention, the engagement structure between the driven rotating body and the support member can be a simple structure with good productivity and, for example, the support member has an annular protrusion on its outer periphery. Compared with the structure that is received from the surface side, the annular protrusion can be arranged further in the centrifugal direction side, so that the bending or backlash of the driven rotating body can be further reduced.

  Further, according to the sixth invention, even when the opening / closing body is close to the driven rotating body when it is wound around the winding body, the opening / closing body is in contact with the annular power transmission member. It can be blocked by the portion, and as a result, the annular power transmission member can be prevented from being damaged or dropped off.

Furthermore, according to the seventh invention, the fixing bracket for supporting the winding body can be disposed through the central portion of the driven rotor and the central portion of the support member.
Therefore, for example, the fixed bracket is first attached to the immovable part, and the driven rotating body and the support member can be arranged around the attached fixed bracket by post-operation, and the workability is good. . As a result, productivity, maintenance property, etc. of the switchgear can be improved.

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

  The opening / closing apparatus 1 includes an opening / closing body 10 that opens and closes by sliding an end portion in the closing direction, guide rails 20 and 20 that guide both ends of the opening / closing body 10 in the opening / closing direction, and the opening / closing body 10. Winding body 31 that winds and unwinds, driven rotating body 41 that transmits a rotational force to the winding body 31, an opening / closing device 50 that is a rotational power source of the winding body 31, and rotation of the opening / closing device 50 An endless ring-shaped power transmission member 60 that transmits force to the driven rotating body 41 is provided.

  The opening / closing body 10 constitutes an opening / closing body main body 11 by connecting a plurality of so-called slats formed by bending a horizontally long substantially rectangular metal plate so as to rotate between the vertically adjacent slats. A seat plate member 12 is connected to the lower end portion of the body main body 11 in the opening / closing body width direction so as to be in contact with the contact target portion p (the ground, floor surface, lower frame, or the like).

Further, the guide rail 20 surrounds the end of the opening / closing body 10 in the width direction by drawing or extrusion molding of an aluminum alloy material, bending of another metal plate (for example, a steel plate or a stainless plate), or the like. The formed member, which is disposed between the contact target portion p seated by the opening / closing body 10 and the winding body 31.
In addition, although the said contact | abutting object site | part p is made into the lower frame member according to the example of illustration, it can also be made into a floor surface, the ground, and another frame member.

The winding body 31 includes a main body portion 31a and an engaging rotary body 31b connected to one end side in the axial direction of the main body portion 31a, and is rotatable on the outer peripheral surface of the fixed shaft 32 on the axial center side. It is supported and provided in the opening / closing body width direction in the storage case 33.
The main body 31a includes a plurality of substantially disk-shaped rotating disks 31a1 arranged at predetermined intervals across the opening / closing body width direction, and the plurality of rotating disks 31a1 are arranged at a portion on the centrifugal direction side (in the illustrated example). According to this, two are connected on a diagonal line by a substantially rod-shaped connecting member 31a2, and a fixed shaft 32, which will be described later, is inserted through the center of each rotating disk 31a1 (see FIGS. 2 and 4).

The engaging rotator 31b includes a plurality of (two in the illustrated example) engaging rods 31b1 that engage with a driven rotator 41, which will be described later, and a rotating disk 31b2 that supports these engaging rods 31b1. The turntable 31b2 is supported so as to be rotatable with respect to the fixed shaft 32.
Each engaging rod 31b1 has one end fixed to the turntable 31a1 and the other end fitted to the driven rotating body 41 so as to be freely inserted and removed in the axial direction.

  The winding body 31 having the above-described structure has the upper end portion of the opening / closing body 10 fixed to the outer peripheral portion thereof, and can be opened / closed by rotating while rotating the respective rotating disks 31a1 and 31b2 on the outer peripheral surface of the fixed shaft 32. The body 10 is wound up or fed out.

The fixed shaft 32 is a shaft-like or cylindrical member that is slightly longer than the entire length in the width direction of the opening / closing body 10, and at least one end thereof is fixed to the inner surface of the storage case 34 via a fixing bracket 33. (See FIG. 2). In addition, although illustration is abbreviate | omitted, according to the preferable example of this Embodiment, the other end side which is not illustrated is similarly fixed to the inner surface of a storage case.
A biasing member 35 is disposed around the fixed shaft 32 to assist the winding operation by the opening / closing machine 50 by biasing the winding body 31 in the winding direction with respect to the fixed shaft 32. ing.
The urging member 35 is configured by a coil spring, a spring, or the like, and has one end fixed to the fixed shaft 32 and the other end fixed to the rotating disk 31a1, and the rotating disk 31a1 is applied to the opening / closing body winding direction. It is fast.

The fixing bracket 33 is formed, for example, by pressing a metal plate material, and has a substantially U-shape opening upward as viewed from the winding body 31 side. The fixing bracket 33 is screwed or riveted to the inner surface of the storage case 34. It is fixed by fixing means such as welding.
The fixed shaft 32 may be mounted on the fixed bracket 33 so as to be mounted from above or may be mounted so as to be inserted in the axial direction. The fixed bracket 33 and the fixed shaft 32 are fixed by a fastener such as a bolt.

The storage case 34 is provided above the closed opening / closing body 10 in the opening / closing body width direction, and the winding body 31, the opening / closing body 10 when wound around the winding body 31, and the fixed shaft. 32, the switch 50, the endless ring-shaped power transmission member 60, and the like are housed.
According to the illustrated preferred example, the storage case 34 includes a main body 34a that surrounds the front surface and upper and lower surfaces of the winding body 31, the fixed shaft 32, and the like, and side portions that block the openings on both sides of the main body portion 34a. Although it is made up of a plurality of members such as the covers 34b, 34b, etc., the maintainability is improved, but it may be made up of more members or a single unitary member. It is.

Further, the driven rotating body 41 engages the support member 42 fixed to the storage case 34 that is a non-moving part in the circumferential direction with respect to the outer peripheral surface of the winding body 31. Therefore, it is supported rotatably.
More specifically, the driven rotating body 41 has a substantially disk shape, and has an uneven portion 41a for engaging with an endless ring-shaped power transmission member 60 described later over substantially the entire outer periphery thereof. The uneven portion 41a has a so-called sprocket tooth shape.
And in the vicinity of the said uneven | corrugated | grooved part 41a in the driven rotary body 41, the cyclic | annular protrusion 41b which protrudes to an axial direction and extends to the circumferential direction is provided. The annular protrusions 41b are provided on both sides of the driven rotor 41 in the axial direction, and each annular protrusion 41b is engaged with the support member 42 in the circumferential direction.
In addition, a through hole 41c that penetrates in the axial direction is provided at the center of the driven rotating body 41 so that the fixed bracket 33 is loosely inserted.
A plurality of engaging portions 41d (two in the illustrated example) for engaging the engaging rod 31b1 of the engaging rotating body 31b are provided between the annular protrusion 41b and the through-hole 41c. ing.
Each engaging portion 41d is formed in a frame shape protruding toward the engaging rotating body 31b and the winding body 31 (see FIGS. 3 and 4), and the end of the engaging rod 31b1 is fitted so as to be removable. Yes.

  The support member 42 includes a base portion 42a fixed to the storage case 34 and a cover portion 42b fitted and fixed to the base portion 42a.

The base portion 42a has a substantially disk shape according to the illustrated example, and has a through hole 42a1 (see FIG. 3) for loosely inserting the fixing bracket 33 in the center thereof, and a driven rotation on the outer peripheral side thereof. An annular receiving portion 42a2 is provided so as to receive the inner surface of the annular protrusion 41b on the stationary part (specifically, the side cover 34b) side of the body 41.
The outer peripheral portion of the base portion 42a is fixed to the side cover 34b of the storage case 34 by fixing means such as screws or rivets.

Further, the cover part 42 b is provided so as to cover the driven rotating body 41 and the endless ring-shaped power transmission member 60 hung on the driven rotating body 41 from the winding body 31 side, and the cover 42 b of the opening / closing body 10 wound around the winding body 31. It is located between the width direction end and the driven rotating body 41.
On the center side of the cover portion 42b, a through-hole 42b1 is formed for loosely inserting the fixing bracket 33 and arranging the center side portion of the driven rotating body 41. An annular receiving portion 42b2 protrudes from the inner edge of the through hole 42b1 so as to receive the annular protrusion 41b on the winding body 31 side of the driven rotating body 41.
Further, an insertion hole 42b3 (see FIG. 3) for inserting an endless ring-shaped power transmission member 60 described later is provided on the outer peripheral surface of the cover portion 42b.
And this cover part 42b is fitted in the uneven | corrugated shape by the outer peripheral part side with respect to the base part 42a.

  In addition, it is preferable that the material of the said driven rotary body 41, the base part 42a, and the cover part 42b is a synthetic resin material of low friction property in order to rotate the driven rotary body 41 smoothly, for example, nylon resin POM, PBT, PP, etc. are used.

  The opening / closing machine 50 is a direct current or alternating current motor, and a drive rotating body 51 such as a sprocket is fixed to an output shaft thereof. An endless ring-shaped power transmission member 60 to be described later is hung on the drive rotator 51.

The endless ring-shaped power transmission member 60 uses a chain according to the present embodiment, and is wound around the two rotary bodies of the driven rotary body 41 and the drive rotary body 51 to thereby provide a power transmission mechanism using a chain and a sprocket. Is configured.
The power transmission mechanism can be replaced with a power transmission mechanism using a pulley and a belt.

Next, an example of the assembly procedure for the main part of the opening / closing device 1 will be described in detail.
First, the fixing bracket 33 is fixed to one side cover 34 b of the storage case 34. The fixing bracket 33 may be fixed in advance to the side cover 34b.
Next, the base portion 42 a of the support member 42 is fixed to the side cover 34 b of the storage case 34 so as to be positioned around the fixing bracket 33.
Then, the driven rotating body 41 in a state where the endless ring-shaped power transmission member 60 is hung is engaged with the annular receiving portion 42a2 of the base portion 42a, and further, the cover portion 42b is fitted with the base portion 42a.
Then, the engagement rod 31b1 of the engagement rotator 31b is engaged with the driven rotator 41, and the fixed shaft 32 is mounted on the fixed bracket 33.

According to the above assembling procedure, the driven rotary body 41, the opening / closing machine 50, the opening / closing apparatus that is a manually opening / closing type opening / closing apparatus that does not include a drive source and that supports the fixed shaft 32 by the fixing bracket 33, When a power mechanism including the endless ring-shaped power transmission member 60 or the like is retrofitted, the work can be performed without removing the fixed bracket 33 from the stationary part such as the storage case 34, and the workability is good.
Further, even when the driven rotating body 41, the support member 42, and the like are replaced for repair or the like, the replacement work can be performed relatively easily without removing the fixing bracket 33.
In the above assembling procedure, the fixing bracket 33 can be fixed to the storage case 34 after the support member 42 and the driven rotating body 41 are configured.

Next, operational effects when the opening / closing device 1 having the above-described configuration is opened and closed will be described in detail.
When the opening / closing machine 50 operates in response to a command from a control circuit (not shown), the rotational force of the drive rotating body 51 of the opening / closing machine 50 is transmitted to the driven rotating body 41 via the endless ring-shaped power transmission member 60. The rotation is transmitted to the winding body 31, and the winding body 31 rotates in a predetermined rotation direction.
During this rotation, the driven rotator 41 is pulled by the endless ring-shaped power transmission member 60 from a direction substantially orthogonal to the axial direction, but the endless ring-shaped power transmission member 60 on the centrifugal direction side of the outer peripheral portion of the winding body 31 is pulled. Since it is supported in the vicinity by the support member 42, it is difficult to cause axial deflection or backlash.
That is, if the driven rotating body 41 is supported on the inner side of the outer periphery of the winding body 31, the distance between the supporting portion and the endless ring-shaped power transmission member 60 is relatively long. Although there exists a possibility that the driven rotating body 41 may bend and play due to the tensile force of the ring-shaped power transmission member 60, the above configuration can reduce the occurrence of the bend and play.

Further, since the inner surface of the support member 42 is close to the periphery of the endless ring-shaped power transmission member 60, the endless ring-shaped power transmission member 60 falls off the driven rotation body 41 during the rotation of the driven rotation body 41. Can be prevented.
Moreover, since the cover portion 42b of the support member 42 is located between the opening / closing body 10 and the endless ring-shaped power transmission member 60, the end portion of the opening / closing body 10 in the width direction when wound around the winding body 31 is assumed. However, even if the storage case 34 has moved toward the side cover 34b, the end in the width direction of the opening / closing body 10 is prevented from coming into contact with the endless ring-shaped power transmission member 60, the driven rotating body 41, or the like. be able to.

  Next, another example of the switchgear 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 described above are used for the components that are substantially the same as those of the switchgear 1 described above, and a detailed description thereof is omitted.

  The opening / closing device 2 shown in FIG. 5 is configured such that the winding body 31 ′ is engaged with the driven rotating body 41 ′ by a fastening member 31 b 3 ′ such as a screw or a bolt.

The winding body 31 ′ is composed of the main body 31a and the engaging rotator 31b ′ described above, and the engaging rotator 31b ′ is composed of a connecting rod 31b1 ′ and a rotating disk 31b2 ′.
The connecting rod 31b1 ′ is a rod-like member that connects the rotating disc 31a1 and the rotating disc 31b2 ′, and is configured to omit the portion of the engaging rod 31b1 on the driven rotating body 41 ′ side from the rotating disc 31b2. The
The turntable 31b2 'is formed with a through hole 31b21' for inserting the fastening member 31b3 'into the turntable 31b2.
The driven rotator 41 ′ has a screw hole 41d ′ in place of the engaging portion 41d of the driven rotator 41 described above.

  According to this opening / closing device 2, the same operational effects as the above-described opening / closing device 1 can be obtained, the bending and backlash of the driven rotating body 41 'can be suppressed, and the maintainability is also good.

  Further, in the opening / closing device 3 shown in FIG. 6, a separate engaging rotating body 31b ″ is fixed to the main body 31a by a fixing member such as a screw or a bolt.

The engaging rotator 31b ″ includes a plurality of (two in the illustrated example) engaging rods 31b1 that can be engaged with the driven rotator 41, and screws and bolts with respect to a midway portion in the axial direction of the engaging rods 31b1. The rotating disk 31b2 ″ fixed by, for example, and the fixing disk 31b3 ″ fixed to the end of the engaging bar 31b1 on the main body 31a side.
The engaging rotator 31b ″ is configured integrally with the main body 31a by fixing the fixing plate 31b3 ″ to the rotating plate 31a1 ″ with screws, bolts, or the like.

According to the opening / closing device 3 configured as described above, the engaging rotator 31b ″ can be configured to be detachable for maintenance or the like.
Further, for example, when the manual opening / closing type opening / closing device that does not include the engaging rotating body is improved to an electric opening / closing type opening / closing device, the engaging rotating body 31b ″ can be easily mounted, and the improvement can be easily performed. It can be carried out.

It is a perspective view which shows an example of the switchgear concerning this invention. It is principal part sectional drawing of the switchgear. FIG. 3 is an exploded perspective view of a main part showing a mounting structure of a driven rotor in the opening / closing device. FIG. 3 is an exploded perspective view of a main part showing an engagement structure between a winding body and a driven rotating body in the opening / closing device. It is principal part sectional drawing which shows the other examples of the switchgear concerning this invention. It is a disassembled perspective view which shows the edge part of a winding body in the other example of the switchgear concerning this invention.

Explanation of symbols

1, 2, 3: Opening / closing device 10: Opening / closing body 31, 31 ', 31 ": Winding body 32: Fixed shaft 33: Fixed bracket 41, 41': Followed rotating body 41b: Annular protrusion 41c: Through hole 42: Support member 42a: Base part 42a1: Through hole 42b: Cover part 42b1: Through hole 60: Endless ring-shaped power transmission member

Claims (7)

A winding body that is rotatably supported, a driven rotating body that engages with the end of the winding body in a substantially coaxial manner to transmit a rotational force to the winding body, and an outer peripheral surface of the driven rotating body And an endless ring-shaped power transmission member that is applied to the driven rotating body and transmits a rotational force to the driven rotating body, the winding body is rotated by the rotational force of the endless ring-shaped power transmission member, and the opening / closing body is moved by the winding body. In an opening and closing device that winds or unwinds,
The driven rotator is rotatably supported by engaging a portion on the centrifugal direction side of the outer peripheral surface of the winding body with a support member fixed to the non-moving portion in the circumferential direction. A switchgear characterized by comprising:   2. The switchgear according to claim 1, wherein an engagement portion between the driven rotator and the support member is disposed in the vicinity of an outer peripheral surface of the driven rotator.   The opening / closing apparatus according to claim 1 or 2, wherein engagement positions between the driven rotating body and the support member are provided on both sides in the axial direction of the driven rotating body.   The driven rotator includes an annular protrusion that protrudes in the axial direction and extends in the circumferential direction, and is rotatably supported by engaging the annular protrusion with the support member in the circumferential direction. The switchgear according to any one of claims 1 to 3, wherein the switchgear is characterized in that   4. The switchgear according to claim 3, wherein the support member is provided so as to receive the annular protrusion from the inner peripheral surface side.   The support member is integrally provided with a cover so as to be positioned between the end portion in the width direction of the opening / closing body wound around the winding body and the endless ring-shaped power transmission member hung on the driven rotating body. The switchgear according to any one of claims 1 to 5, wherein the switchgear is provided. A fixed shaft that rotatably supports the winding body on its axis, and a fixed bracket that supports the end of the fixed shaft so as not to rotate and is fixed to a stationary part;
The through hole which penetrates to an axial direction is provided in the center side of the said driven rotary body and the said supporting member so that the said fixing bracket may be penetrated, The any one of Claim 1 thru | or 6 characterized by the above-mentioned. Switchgear.

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