JP4897294B2 - Switchgear - Google Patents

Description

  The present invention relates to an opening / closing device that receives a winding body rotatably by a plurality of rollers on the lower side thereof, and winds and unwinds the opening / closing body by the rotating winding body, and more particularly, a shutter device, The present invention relates to an opening / closing device suitable as a roll screen device or the like.

Conventionally, in this kind of invention, like the one described in Patent Document 1, a winding body (winding portion 4) for winding and unwinding an opening / closing body (fireproof sheet 6) is provided from the lower side. There is a building shutter that is received by a pair of rollers (28, 28).
According to this prior art, since the winding body (winding portion 4) is structured to be received from below, the winding body (winding portion 4) is compared with a structure in which the winding body is supported at both ends thereof. It can suppress that the axial direction center side bends below, and is effective especially when the axial direction dimension of a winding body (winding part 4) is comparatively long.

However, in the above prior art, the portion of the opening / closing body that is drawn from the winding body hangs down, so that the load direction of the winding body and the opening / closing body wound around the winding body depends on the weight of the suspending portion. Since the tilting is slightly inclined toward the opening / closing body feeding side, the winding body and the opening / closing body wound around the winding body may fall off to the feeding side.
According to Patent Document 1, the above-mentioned dropout is prevented by the building housing (21) or the like, but such construction may be difficult depending on the situation at the site.
Further, in the above prior art, the load direction of the winding body and the opening / closing body wound around the winding body is slightly inclined toward the opening / closing body feeding side as described above, so the opening / closing body feeding side of the pair of rollers. In some cases, a larger load than the other roller may be applied to this roller (for example, the right roller 28 in FIG. 2 of Patent Document 1).
Therefore, the opening / closing body may be worn by a relatively strong pressing force received from one roller on the opening / closing body feeding side, or the durability of the roller may be reduced.
JP 2000-303762 A

  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 that the opening / closing body can be prevented from falling off from the plurality of rollers on the lower side, and the plurality of rollers. To prevent the load of the winding body from being biased to a part of the roller and damaging the opening / closing body due to the pressing force received from that part of the roller, or reducing the durability of that part of the roller. An object of the present invention is to provide a switchgear that can be used.

Means for solving the above-described problems includes: a winding body that winds and unwinds the opening / closing body to open and close; and a plurality of rollers that rotate by receiving the winding body from below. In the apparatus, of the plurality of rollers, an outer peripheral contact position of a roller closest to a portion of the opening / closing body that is fed from the winding body is disposed higher than an outer peripheral contact position of a roller adjacent to the roller. Then , the plurality of rollers are supported by a support bracket, and the support bracket connects the support piece portions on both sides for rotatably supporting the shaft portions of the plurality of rollers, and the support piece portions on the lower side. A bottom surface portion and two fitting pieces projecting downward from the bottom surface portion, and the two fitting pieces are spaced apart in the thickness direction of the opening / closing body when being drawn out from the winding body The lower part of the Is configured to have a substantially U-shaped cross section consisting of the bottom surface portion and the two fitting pieces, and the support bracket fits a stationary member inside the U-shaped section without gaps, It is fixed to a stationary member .

In the first embodiment, in the opening / closing apparatus comprising a winding body that winds or unwinds the opening / closing body and opens and closes, and a plurality of rollers that rotate by receiving the winding body from the lower side, Among the plurality of rollers, the outer peripheral portion contact position of the roller closest to the portion of the opening / closing body that is fed from the winding body is disposed higher than the outer peripheral contact position of the roller adjacent to the roller. And
Here, in the switchgear according to the present embodiment , the mode in which the switchgear is used to perform only the closing operation (for example, a shutter device that is closed for the purpose of smoke shielding or flame shielding only in an emergency) A mode in which the body is used to perform only an opening operation (for example, a shutter device that is opened only for emergency purposes), a mode in which the opening / closing body is used to perform both an opening operation and a closing operation, etc. including.

In addition, the opening / closing body includes an opening / closing body formed by connecting so-called slats in the opening / closing direction, an opening / closing body formed by arranging pipe members at predetermined intervals in the opening / closing direction, and a plurality of panel-like members connected in the opening / closing direction. Open / close bodies made of flexible sheet material, open / close bodies made by appropriately combining these slats, pipe materials, panel-like members, flexible sheet materials, etc. From the viewpoint of the above, it is preferably an opening / closing body made of a flexible sheet material.
In addition, although the said flexible sheet | seat material includes the product made from a synthetic resin material, cloth, etc., when considering fire resistance (a flame retardance, incombustibility etc. are included) especially, it has fire resistance. It is preferable to be constituted by a material or a material processed to have fire resistance.
The opening / closing direction of the opening / closing body is preferably substantially vertical, but can be oblique or substantially horizontal.

  Further, the winding body may be configured to rotate to wind the opening / closing body around the outer peripheral surface or to feed the opening / closing body wound around the outer peripheral surface. The winding body includes an aspect configured in a substantially cylindrical shape, an aspect configured in a substantially saddle shape, and the like.

In more detail, the plurality of rollers are arranged on the lower side of the winding body so as to be substantially parallel to the winding body, and are configured to receive the winding body in a rotatable manner. ing.
The plurality of rollers include a mode of being a pair of two rollers, a mode of being three or more rollers, and the like.

When the number of the rollers is three or more, the position of the outer peripheral contact point is limited by the present embodiment , the roller closest to the portion of the opening / closing body that is fed from the winding body, and immediately adjacent to the roller. With the roller located. Therefore, the other roller may have an outer peripheral contact position that is higher or lower than the peripheral contact position of the two adjacent rollers, or may be the same height. That is, the height position of the other rollers is arbitrary as long as the winding body is received from the lower side.

  In addition, “the roller closest to the portion of the opening / closing body that is fed out from the winding body” means that, for example, when the opening / closing direction of the opening / closing body is the vertical direction, the opening / closing body hangs down from the winding body The roller closest to the part.

  Further, the “peripheral portion contact position of the roller” is a contact position where the outer peripheral portion of the roller is in contact with the outer periphery of the winding body or the opening / closing body wound around the winding body. Means.

In addition, in the configuration that “the position of the outer peripheral contact point of the roller closest to the portion of the opening / closing body that is fed from the winding body is higher than the outer peripheral contact point position of the roller adjacent to the roller” A configuration in which the outer diameter of the nearest roller and the outer diameter of the adjacent roller are substantially matched, a configuration in which the outer diameter of the nearest roller is smaller than the outer diameter of the adjacent roller, The structure etc. which made the outer diameter larger than the outer diameter of the said adjacent roller are included.
Of the above-described configurations, a particularly preferable aspect is a configuration in which the outer diameter of the nearest roller and the outer diameter of the adjacent roller are substantially matched, or the outer diameter of the nearest roller is adjacent to the adjacent roller. The configuration is larger than the outer diameter of the roller.

Further, in the second mode , of the plurality of rollers, the outer peripheral contact point position of the roller closest to the portion of the opening / closing body that is fed from the winding body is fed from the winding body of the opening / closing body. The position of the outer peripheral contact point of the roller farthest from the outermost part is disposed, and the direction connecting the outer peripheral contact position of the nearest roller and the outer peripheral contact position of the furthest roller is determined by the load of the winding body. It is characterized by being substantially orthogonal to the direction.

That is, according to the second embodiment , the outer peripheral contact point position of the roller closest to the portion of the opening / closing body that is fed from the winding body, and the portion of the opening / closing body that is fed from the winding body are the most. A virtual plane passing through the outer peripheral contact point position of the far roller is substantially orthogonal to the load direction of the winding body.
In addition, the said load direction is a direction where the load of the said winding body and the opening / closing body wound around the said winding body acts.
This load direction is obtained experimentally or theoretically. For example, when the opening / closing body opening / closing direction is the vertical direction, it is usually inclined slightly toward the opening / closing body feeding side from directly below.

Further, in the third embodiment , at least two rollers excluding the roller closest to the portion fed out from the winding body in the opening and closing body among the three or more rollers provided with three or more rollers, It is characterized by being disposed substantially horizontally.

In the fourth embodiment , the plurality of rollers are rotatably supported by a support bracket, and the support bracket is fixed to an immovable member with an elastic body interposed therebetween.

In the present specification, the “opening / closing body width direction” means a direction substantially perpendicular to the opening / closing direction of the opening / closing body and not the thickness direction of the opening / closing body. The “thickness direction of the opening / closing body” means the thickness direction of the opening / closing body in the closed state.
Further, in this specification, the “opening / closing body opening / closing direction” means a direction in which the opening / closing body partitions or opens the space .

Since the said form is comprised as demonstrated above, there exists an effect as described below.
According to the first embodiment , it is possible to prevent the take-up body from dropping off to the opening / closing body feeding side by the roller provided with the peripheral portion contact position higher than the adjacent roller.
Furthermore, even if the load direction of the winding body and the opening / closing body wound around the winding body is inclined toward the opening / closing body feeding side, the winding body is structured to receive the winding body from the opening / closing body feeding side. The body load can be distributed substantially evenly to the plurality of rollers.
Therefore, it is possible to prevent the opening / closing body from being damaged by the pressing force received from some rollers or the durability of some rollers from being reduced.

Furthermore, according to the second embodiment , the load of the winding body can be more evenly distributed to the plurality of rollers. As a result, the opening / closing body is damaged by the pressing force from some of the rollers, or part of the winding body is damaged. It is possible to effectively prevent a decrease in durability of the roller.

Furthermore, according to the third aspect , the load of the winding body can be appropriately distributed to the plurality of rollers according to the amount of feeding (or winding amount) of the opening / closing body in the winding body, and thus Further, it is possible to more effectively prevent the opening / closing body from being damaged by the pressing force from some of the rollers, and the durability of some of the rollers from being lowered.

Furthermore, according to the 4th form , since the position of a some roller is corrected with an elastic body, the load which each roller receives can be equalized more .

Next, a preferred specific example of the above embodiment will be described with reference to the drawings.
The following specific examples are arranged in houses, buildings, warehouses, factories, underground malls, tunnels, vehicle loading platforms, etc., construction openings, and inside the constructions / structures. An opening / closing device for partitioning or opening a space inside a construction / structure, particularly an opening / closing device preferable as a screen shutter device in which substantially the entire area of the opening / closing body is formed of a flexible sheet material will be described.

  The opening / closing device includes an opening / closing body 10 that partitions and opens a space in the vertical direction by a flexible sheet portion 11, and a winding that is disposed substantially horizontally so as to wind and unwind the opening / closing body 10. A body 20, a support member 31 that receives the winding body 20 and the flexible sheet portion 11 when wound around the winding body from the lower side thereof, and both ends of the opening / closing body 10 in the width direction. And a guide rail (not shown) for guiding in the opening and closing direction.

  The flexible sheet portion 11 includes a plurality of sheet portion constituent members 11a arranged in the opening / closing body width direction so as to correspond respectively to a plurality of winding member constituting members 21 constituting a winding body 20 described later. The mating seat portion constituting members 11a, 11a are connected by detachable fastening means (for example, buttons, hooks, slide fasteners, hook-and-loop fasteners, bolts and nuts, magnets, etc.) Bending is formed in the opening / closing body width direction so as to release the tension.

Each sheet part constituting member 11a is configured by overlapping a plurality of sheet materials 11a1 arranged in the opening / closing body width direction on the end side and sewing the overlapping portion in the opening / closing body opening / closing direction. ing.
Each sheet material 11a1 is made of, for example, a flame retardant fabric such as glass cloth or silica cloth, a vinyl chloride resin sheet material subjected to fluorine processing, a synthetic resin sheet material containing glass fiber, flame retardant or non-flammability, etc. It consists of a flexible sheet material having fire resistance.
In addition, according to the illustrated example, the sheet portion constituting member 11a is configured from the plurality of sheet materials 11a1 arranged in the opening / closing body width direction, but the sheet portion constituting member 11a is configured from the plurality of sheet materials arranged in the opening / closing body opening / closing direction. It is also possible to form the sheet portion constituting member 11a from a plurality of sheet materials arranged in the opening / closing body width direction and the opening / closing body opening / closing direction.

And the edge part of the opening / closing body opening direction side of each sheet | seat part structural member 11a is formed in a longitudinal cross-section bag shape, and the fastening member 12 is inserted over the opening / closing body width direction in the bag-shaped part. (See FIG. 2).
The fastening member 12 is Ri Oh in rod-shaped member of each winding-up body structure member 21 substantially the same length of the winding body 20, in accordance with a preferred example shown in the figure, and a longitudinal sectional rectangular bar-like member.
The material of the fastening member 12 may be a rigid material. In particular, from the viewpoint of improving fire resistance and productivity, it is preferable to use a metal material such as a steel material or a stainless steel material. A rigid resin material, wood, ceramic material, stone material, or the like can also be used.

  Further, the winding body 20 includes a plurality of winding body constituting members 21 arranged at predetermined intervals over the width direction of the opening / closing body by a core 23 (see FIG. 2) and a shaft member 22 from the inside. It consists of supporting and connecting.

Each of the winding member constituting members 21 is a substantially cylindrical member made of a relatively lightweight metal material. The winding member constituting member 21 includes a concave portion 21a extending in the axial direction on the outer peripheral surface thereof, and the fastening member 12 is fitted into the concave portion 21a. The projection amount of the fastening member 12 in the centrifugal direction is reduced.
According to this configuration, it is possible to reduce the thickness of the sheet portion constituting member 11a wound around the winding body constituting member 21, and the sheet portion constituting member 11a is worn or worn by friction with the support member 31 or the like. The possibility of breakage or the like can be reduced.

  And the winding body 20 of the said structure is rotatably received by the several support member 31 arrange | positioned by the predetermined interval over the opening-and-closing body width direction on the downward side, The axial direction edge part side Is rotated in the forward and reverse directions by a drive source 25 (for example, an electric motor, an air motor, a manual rotation mechanism, etc.) provided in the motor.

  Each support member 31 supports a plurality of (a pair according to FIGS. 2 and 3) rollers 31a and 31b that receive the winding body 20 from the lower side thereof, and rotatably supports these rollers 31a and 31b. Support bracket 31c.

Among the plurality of rollers 31a and 31b, the outer peripheral contact position of the roller 31a closer to the portion of the opening / closing body 10 that is fed from the winding body 20 (in other words, the hanging portion 10a) is the other adjacent to the roller 31a. It is arrange | positioned higher than the outer peripheral part contact position of the roller 31b.
That is, as shown in FIG. 2, the load direction v of the winding body 20 and the opening / closing body 10 wound around the winding body 20 depends on the weight of the hanging portion 10a of the opening / closing body 10, and the opening / closing body feeding side (not shown) Although slightly inclined to the left), a direction d connecting the outer peripheral contact position of one roller 31a and the outer peripheral contact position of the other roller 31b is set so as to be substantially orthogonal to the load direction v.
Further, according to the example shown in FIG. 2, among the plurality of rollers 31a and 31b, an arrangement of the roller 31a closest to the portion of the opening / closing body 10 extended from the winding body 20 and the roller 31b farthest from the portion. The installation direction is substantially orthogonal to the load direction v of the winding body 20.

  The rollers 31a and 31b have a virtual straight line connecting the center of one roller 31a and the center of the winding body 20, and a virtual straight line connecting the center of the other roller 31b and the center of the winding body 20. Is set to approximately 60 degrees. This angle is a suitable value that makes it difficult for the winding body 20 to fall off from the pair of rollers 31a and 31b and that can reduce the load acting on each roller 31a (or 31b).

Further, as shown in FIG. 3, the support bracket 31c includes support piece portions 31c1 and 31c1 on both sides for rotatably supporting the shaft portions of the plurality of rollers 31a and 31b, and the support piece portions 31c1 and 31c1 downward. It is comprised integrally from the bottom face part 31c2 connected by the side, and both fitting pieces 31c3 and 31c3 which protrude below from both edges of this bottom face part 31c2.
The support bracket 31c is fitted and fixed to the lower immovable member x1 with an elastic body 40 interposed inside a substantially U-shaped section composed of the bottom surface portion 31c2 and the fitting pieces 31c3 and 31c3. Has been.

  According to the illustrated example, the immobile member x1 is a long member having a substantially rectangular cross section, is disposed across the width of the opening / closing body, and is fixed to the wall surface of the housing via another support member or the like. The cross-sectional shape of the immovable member x1 is not limited to the illustrated example, and may be a substantially U shape, a substantially L shape, or the like.

The elastic body 40 is made of rubber, an elastic synthetic resin material, a sheet material having elasticity such as a foam material, and, according to a preferred example illustrated, a bottom portion 41 disposed corresponding to the back surface of the bottom surface portion 31c2, It consists of both side parts 42 and 42 arrange | positioned corresponding to the back surface of both fitting pieces 31c3 and 31c3.
The bottom portion 41 enables the support member 30 to be finely moved in the vertical direction due to its elasticity.
Further, the both side portions 42 and 42 allow the support member 30 to finely move in a direction substantially orthogonal to the axial direction of the winding body 20 due to its elasticity.

  In the illustrated example, the contact stability between the flexible sheet portion 11 and each support member 31 is determined by arranging each support member 31 corresponding to the thick portion p where adjacent sheet materials 11a1 and 11a1 overlap. However, it is also possible to arrange the support member 31 at a place other than the thick part p.

  Thus, according to the opening / closing device having the above-described configuration, as shown in FIG. 2, the winding body 20 and the load direction v of the opening / closing body 10 wound around the winding body 20 are 20 is tilted toward the opening / closing member feeding side due to the weight of the portion 10a fed from 20, but the outer peripheral contact point position of the roller 31a on the opening / closing member feeding side is arranged higher than the outer peripheral contact point position of the roller 31b. The body 20 and the opening / closing body 10 wound around the winding body 20 can be prevented from falling off to the opening / closing body feeding side.

  Furthermore, the outer peripheral contact point position of one roller 31a and the outer peripheral contact point position of the other roller 31b are connected to the winding body 20 and the load direction v of the opening / closing body 10 wound around the winding body 20. Since the direction d is substantially orthogonal, the loads acting on both rollers 31a and 31b can be made substantially uniform.

Further, since the support member 31 is supported by the elasticity of the elastic body 40 so as to be finely moved in the vertical direction and in a direction substantially orthogonal to the winding body 20, the pair of rollers 31a and 31b is also provided by this elastic support structure. It is possible to prevent the load from being biased to one of the two.
Furthermore, each roller 31a (roller 31b) can be brought into contact with the winding body 20 substantially in parallel by the elasticity of the elastic body 40, so that the load per unit area in each roller 31a (31b) is equalized. .
In addition, due to the elasticity of the elastic body 40, the loads acting on the plurality of support members 31 arranged in the opening / closing body width direction can be equalized.

Therefore, the flexible sheet portion 11 of the opening / closing body 10 is subjected to a relatively strong pressing force from the roller 31a on the opening / closing body feeding side to be worn or damaged, or the durability of the roller 31a is reduced. Can be prevented.
In addition, the flexible sheet portion 11 of the opening / closing body 10 may be worn or damaged by receiving a relatively strong pressing force from some of the support members 31 arranged in the width direction of the opening / closing body. Further, it is possible to prevent the durability of the support member 31 from being lowered.

In order to more reliably prevent the winding body 20 and the opening / closing body 10 wound around the winding body 20 from falling off to the opening / closing body feeding side, the support structure of the support member 31 is as shown in FIG. May be.
In the support structure shown in FIG. 4, the member x2 that receives the immovable member x1 to which the support member 30 is fitted surrounds the winding body 20 and the opening / closing body 10 wound around the winding body 20, and the opening / closing body. It is formed in a substantially frame shape that can be inserted through 10 hanging portions 10a.
Therefore, the winding body 20 and the opening / closing body 10 wound around the winding body 20 can be prevented from falling off by the substantially frame-shaped member x2.

  Moreover, in the said embodiment, the supporting member 31 can be substituted by the supporting member mentioned later. In addition, in the support member shown below, about the location substantially the same as the said support member 31, the code | symbol same as the said support member 31 is attached | subjected, and the detailed description which overlaps is abbreviate | omitted.

The support member 32 shown in FIG. 5 is adjacent to the roller 31a at the outer peripheral contact point of the roller 31a that is closest to the portion of the opening / closing body 10 fed from the winding body 20 among the three rollers 31a, 31d, and 31b. The outer peripheral contact point of the roller 31d that is farthest from the portion of the opening / closing body 10 fed from the winding body 20 is disposed higher than the outer peripheral contact point of the matching roller 31d. Further, a direction d connecting the outer peripheral contact point position of the nearest roller 31a and the outer peripheral contact point position of the farthest roller 31b with respect to the load direction v of the winding body 20 is arranged higher than the position. It is orthogonal.
Further, the support member 32 allows the two rollers 31d, 31b, except for the roller 31a closest to the portion of the opening / closing body 10 extended from the winding body 20 to be substantially horizontal, among the three rollers 31a, 31d, 31b. The roller 31d is arranged at a substantially intermediate position between the roller 31a and the roller 31b.
The three rollers 31a, 31d, and 31b are pivotally supported by a support bracket 31c ′ having three pivotal support portions.

  According to the support member 32 having the above-described configuration, the load direction v of the winding body 20 and the opening / closing body 10 wound around the winding body 20 depends on the weight of the portion 10a fed from the winding body 20 in the opening / closing body 10. However, since the position of the outer peripheral contact point of the roller 31a on the opening / closing member supply side is higher than the position of the outer peripheral contact point of the roller 31d, the winding member 20 and the winding member 20 are wound. It is possible to prevent the opened opening / closing body 10 from falling off to the feeding side.

Furthermore, according to the support member 32, when the opening / closing body 10 is substantially fully opened and the opening / closing body 10 is wound around the winding body 20, the winding body 20 and the opening / closing wound around the winding body 20 are provided. Although the load direction of the body 10 is close to the downward direction, the load of the winding body 20 and the opening / closing body 10 wound around the winding body 20 is mainly composed of two substantially horizontal rollers 31d. , 31b are received almost equally.
In the state where the opening / closing body 10 is drawn out from the winding body 20 (the state shown in FIG. 5), the winding body 20 and the load direction v of the opening / closing body 10 wound around the winding body 20 is the opening / closing body feeding side. However, in that case, the load of the winding body 20 and the opening / closing body 10 wound around the winding body 20 is received substantially equally by the plurality of rollers 31a, 31d, and 31b. .
Therefore, the load of the winding body 20 and the opening / closing body 10 wound around the winding body 20 is appropriately applied to the plurality of rollers 31a, 31d, and 31b in accordance with the feed amount (or winding amount) of the opening / closing body 10. As a result, it is possible to effectively prevent damage to the opening / closing body 10 due to the pressing force from some rollers, lowering of durability of some rollers, and the like.

  Further, the support member 33 shown in FIG. 6 substantially supports the three rollers 31a, 31d, and 31b by the support bracket 31c ′ in the same manner as the support member 32 described above, and these three rollers. An endless ring-shaped member 31e is wound around 31a, 31d, 31b, and the three rollers 31a, 31d, 31b elastically receive the winding body 20 via the endless ring-shaped member 31e.

  The endless ring band-shaped member 31e is formed by forming a sheet-like material into an endless ring shape, and is preferably formed from a material having elasticity in the thickness direction, such as rubber or an elastic synthetic resin material. It is also possible to form from such as.

  According to the support member 33 having the above-described configuration, it is possible to prevent the winding body 20 from dropping off in substantially the same manner as the above-described support member 32, and the load of the winding body 20 is further increased by the elasticity of the endless ring-shaped member 31 e. It is possible to effectively disperse and act on the plurality of rollers 31a, 31d, 31b substantially evenly.

Further, the support member 34 shown in FIG. 7 supports the two rollers 31a and 31b rotatably by the support bracket 31c in the same manner as the support member 31 described above, and the two rollers 31a and 31b. An endless ring belt-like member 31e is wound around.
And this support member 34 forms the clearance gap s between the part which contacts the roller 31a outer peripheral surface in the endless ring-shaped member 31e, and the outer peripheral surface of the opening-closing body 10 wound by the winding body 20, and is the same By forming a gap s between the portion of the endless ring-shaped member 31e that contacts the outer peripheral surface of the roller 31b and the outer peripheral surface of the opening / closing body 10 wound around the winding body 20, the endless ring-shaped member 31e While being elastically bent, the winding body 20 is received.

  When this support member 34 is used, the stationary member x1 to which the support member 34 is fitted is fixed to a substantially frame-like member x2 similar to that shown in FIG. The body 20 is prevented from falling off in the opening / closing body feeding direction.

Thus, according to the support member 34 having the above-described configuration, the load of the winding body 20 does not directly act on the rollers 31a and (31b) due to the gaps s and s, and thus the pair of rollers 31a and 31b. The load applied to can be made more uniform.
In addition, since the opening / closing body 10 wound around the winding body 20 is in contact with the endless ring-shaped member 31e that is elastically bent, it is possible to prevent local pressing force from being applied to the opening / closing body 10. As a result, the opening and closing body 10 can be more effectively prevented from being worn or damaged.

  According to the above embodiment, the outer peripheral surface of each of the rollers 31a, 31b, 31d is a metal surface. However, if the outer peripheral surface is covered with an elastic material such as an elastic synthetic resin, It is possible to more effectively prevent the local pressing force from being applied, and as a result, wear and damage of the opening / closing body 10 can be further reduced.

Further, according to the above-described embodiment, the support member 31 (specifically, the rollers 31a, 31b, and 31d) is formed in a short shape whose dimensions in the opening / closing body width direction are shorter than those of the winding member constituting members 21. the support member 31, may be formed in a substantially similar elongated and winding body component 21 or Makitokarada 20, it is also possible Ru Ah further may be formed on the short-length than the illustrated example.

  Further, according to the illustrated example, the number of support members 31 (specifically, the rollers 31a, 31b, 31d) arranged in the width direction of the opening / closing body is plural for each winding member constituting member 21. It is also possible to use a single 31 for each winding member constituting member 21. However, when the winding body 20 or the winding body constituting member 21 is relatively long, it is preferable to provide a plurality of support members 31 so as to disperse the pressing force.

  Further, the arrangement position of the support member 31 in the opening / closing body width direction is arbitrary, but when the support member 31 is singular, it should be near the center in the axial direction of each winding member constituting member 21. Preferably, in the case of a plurality, it is preferable that the positions of the respective winding body constituting members 21 are equally distributed in the axial direction.

It is a front view which shows an example of the switchgear concerning this invention. It is a longitudinal cross-sectional view which shows the structure which supports a winding body in the switchgear. It is a perspective view which shows an example of the supporting member in the opening / closing apparatus. It is a longitudinal cross-sectional view which shows the other example of the structure which supports a winding body. It is a longitudinal cross-sectional view which shows the other example of the structure which supports a winding body. It is a longitudinal cross-sectional view which shows the other example of the structure which supports a winding body. It is a longitudinal cross-sectional view which shows the other example of the structure which supports a winding body.

DESCRIPTION OF SYMBOLS 10: Opening-closing body 20: Winding body 21: Winding body structural member 31, 32, 33, 34: Support member 31a, 31b, 31d: Roller 31c, 31c ': Support bracket 40: Elastic body

Claims (4)

In an opening / closing apparatus comprising a winding body that winds or unwinds the opening / closing body and opens and closes, and a plurality of rollers that rotate by receiving the winding body from below,
Out of the plurality of rollers, the position of the outer peripheral contact point of the roller closest to the portion of the opening / closing body that is fed from the winding body is disposed higher than the position of the outer peripheral contact point of the roller adjacent to the roller , Supporting the plurality of rollers by a support bracket;
The support bracket protrudes downward from the bottom surface portion, a support piece portion on both sides for rotatably supporting the shaft portions of the plurality of rollers, a bottom surface portion connecting the support piece portions on the lower side, and the bottom portion. Two fitting pieces, and by arranging the two fitting pieces at intervals in the thickness direction of the opening and closing body when the two fitting pieces are drawn out from the winding body, Consists of a substantially U-shaped cross section consisting of a bottom portion and the two fitting pieces,
An opening / closing device , wherein the support bracket is fixed to the stationary member by fitting a stationary member inside the U-shaped section with no gap . The support bracket is fixed to the stationary member with an elastic body interposed therebetween,
The elastic body includes a bottom portion corresponding to the back surface of the bottom surface portion and two side portions disposed corresponding to the back surfaces of the two fitting pieces, and the bottom portion is defined as the bottom surface portion. 2. The switchgear according to claim 1, wherein the switch is sandwiched between the stationary member and each of the two side portions is sandwiched between the fitting piece and the stationary member . Out of the plurality of rollers, the outer peripheral contact point position of the roller closest to the portion of the opening / closing body that is fed from the winding body is disposed higher than the outer peripheral contact point position of the roller farthest from the same part,
The direction connecting the outer peripheral contact point position of the nearest roller and the outer peripheral contact point position of the furthest roller is substantially orthogonal to the load direction of the winding body. Switchgear. Of the plurality of rollers, an imaginary straight line connecting the center of the roller closest to the portion of the opening / closing body that is fed from the winding body and the center of the winding body, the center of the roller farthest from the portion, and the center The opening / closing device according to claim 3 , wherein an angle with a virtual straight line connecting the center of the winding body is set to approximately 60 degrees .

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