JP4870417B2 - Switchgear - Google Patents

Description

  The present invention relates to an opening / closing device that partitions or opens a space by an opening / closing body having a door portion made of a flexible sheet material, and more particularly to an opening / closing device suitable as a so-called screen shutter device.

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 open / close body (fireproof sheet 6) is provided in the axial direction. In the vicinity of the center, there is a building shutter that is received by a pair of rollers (28, 28) from below.
According to this prior art, since the winding body (winding portion 4) is configured to be received from below, the winding body (winding portion 4) is compared with a structure in which the winding body is supported only at both ends thereof. Can be prevented from bending downward, and is particularly effective when the axial dimension of the winding body (winding portion 4) is relatively long.

However, in the above prior art, when the opening / closing body (fireproof sheet 6) is provided with a passage for evacuation or the like and a door of a flexible sheet material that opens and closes the passage, winding is performed. When the opening / closing body (fireproof sheet 6) is wound around the body (winding portion 4), the wound opening / closing body (fireproof sheet 6) is rolled up at the door portion. When the thickened portion comes into contact with the pair of rollers (28, 28), the opening / closing body (fireproof sheet 6) is damaged by receiving a strong pressing force from each roller (28). There is a risk that durability will be reduced.
JP 2000-303762 A

  The present invention has been made in view of the above-described conventional circumstances, and the problem is that the opening / closing body is damaged by the pressing force from the support member or the durability of the support member is reduced. An object of the present invention is to provide a switchgear that can be prevented.

Means for solving the above-described problems includes a winding body having an opening / closing body fixed to the outer peripheral surface, and a support member that rotatably supports the winding body from below, and the opening / closing body is wound on the winding body. In the opening / closing device that is wound or unwound by the opening / closing body, the opening / closing body is provided with a through-passage opening, and the passage opening and the surrounding area of the passage opening can be opened and closed. The door part which consists of a flexible sheet | seat material is piled up, The said supporting member is arrange | positioned so that the said opening and the said door part may be avoided in an opening-closing body width direction, The said supporting member is arrange | positioned in the axial direction of the said winding body A plurality of support members are provided at predetermined intervals, and each support member is constituted by a pair of rollers that can rotate by contacting with the outer peripheral surface of the winding body. For the support member closest to the door, The roller spacing in la, is characterized in that narrower than the roller gap of the pair of rollers constituting the other support member.

The first embodiment includes a winding body with the opening / closing body fixed to the outer peripheral surface, and a support member that rotatably supports the winding body from below, and the opening / closing body is wound by the winding body. In the opening / closing device that is extended, the opening / closing body includes a through-passage opening, and a flexible sheet material around the passage opening and the passage opening so as to open / close the passage opening. The support member is disposed so as to avoid the passage port and the door portion in the opening / closing body width direction.
Here, the opening / closing device according to this embodiment includes a mode in which the opening / closing body is used only to perform a closing operation (for example, a shutter device that is closed for the purpose of smoke shielding or flame shielding only in an emergency), and opening / closing. 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.

Further, in the above opening / closing body, a mode in which substantially the whole is formed of a flexible sheet material, a mode in which a part thereof is formed of a flexible sheet material, a substantially whole is a so-called slat or pipe material In addition to being constituted by a panel-like member or the like, an embodiment in which only the door member is constituted by a flexible sheet material is included.
It is preferable that at least a part of the opening / closing body is made of a flexible sheet material from the viewpoint of weight reduction and the like.

Moreover, the said passage opening is an opening part which penetrated the said opening-and-closing body main body, Comprising: The said opening-and-closing body should just be a state which can pass through objects, such as a person and an object, when it is a closed state.
The passage opening includes an aspect in which the passage opening is previously opened with a predetermined area so that the passage object can pass through, and an aspect in which a portion that opens as the passage object passes becomes a passage opening.
That is, as a specific example of the latter mode, a mode in which a cut portion (slit) is formed in the flexible sheet material and the cut portion is expanded when the passing material passes and becomes a passage port. In addition, the flexible sheet material is provided with a substantially vertical cut portion and a substantially horizontal cut portion continuous to the lower end side of the cut portion, and the portions along both cut portions are accompanied by the passage of the passing material. An embodiment in which it is expanded to form a substantially triangular passage opening.

The door portion is a door-like member made of a flexible sheet material that opens and closes the passage opening, and is provided on the opening / closing body, and is opened / closed integrally with the opening / closing operation of the opening / closing body. A member that moves in a direction.
Only one door portion may be provided for one passage opening, or a plurality of door portions may be provided for one passage opening.
In the latter mode, a plurality of door portions are arranged so as to overlap in the opening / closing body thickness direction with respect to one passage opening, and a plurality of door portions are arranged in the opening / closing body width direction with respect to one passage opening. There are a plurality of modes and a mode in which a plurality of these modes are provided in both the opening / closing body thickness direction and the opening / closing body width direction.
Moreover, the number of arrangement | positioning of the said door part and the said opening in the opening-and-closing body width direction may be single, or plural.

Further, in the above-mentioned configuration that “the door portion made of a flexible sheet material is superimposed on the passage opening and the surrounding portion of the passage opening”, the door portion is overlapped with a part of the surrounding portion of the passage opening. Both the aspect made to match and the aspect made to overlap the said door part over the perimeter of the surrounding part of the said passage opening are included.
Further, in the overlapping part in this configuration, the door part is overlapped with a part of the peripheral part of the passage opening and fixed, or the door part is part of the peripheral part of the passage opening. Including locations where they overlap without stopping.

Moreover, as a preferable specific example of the door part, the door part is fixed in a suspended form with at least the lower end part as a free end part, and the passage opening is opened by pushing, pulling, turning, etc. It is set as the aspect which closes a mouth. More specifically, the upper end portion is fixed and the left and right side portions and the lower end portion are opened, or the upper end portion and one side portion are fixed and the other It is set as the aspect etc. which the side part side and the lower end part side of this were opened.
Moreover, as another specific example of the door portion, it is possible to adopt a mode in which one side end portion side is fixed to the opening / closing body main body and the other portion is opened / closed in a substantially open door shape.

  In addition, the winding body includes an aspect configured in a substantially cylindrical shape, an aspect configured in a substantially bowl shape, and the like. This winding body may be a single member configured in the above-described form, or may be a member formed by connecting a plurality of members configured in the above-described form in the axial direction.

  Further, “the support member is disposed so as to avoid the passage port and the door portion in the opening / closing body width direction”, more specifically, the opening / closing body is the winding body. It is the structure which shifted the said supporting member to the opening-and-closing body width direction so that the part of the said opening and door part in the said opening-and-closing body may not contact the said supporting member when it is wound by winding .

  In addition, the support member receives the winding body in a rotatable manner, and the surface shape and material of the portion that contacts the winding body and the opening / closing body wound around the winding body have a small friction coefficient. It is preferable that the support member has a roller-like mode in which the winding body and the opening / closing body wound around the winding body receive and rotate, and the winding body and the winding body. The mode etc. which received the opening-and-closing body received from the downward side and were made to slide are included.

In the second embodiment , a plurality of the support members are provided at predetermined intervals over the axial direction of the winding body, and a pair of the support members that can rotate by contacting the outer peripheral surface of the winding body. Among the plurality of support members, among the plurality of support members, with respect to the support member closest to the passage port and the door portion, the roller interval between the pair of rollers is greater than the roller interval between the pair of rollers constituting the other support member. Also narrowed .

In addition, the technical idea which produces an effect as an independent invention is contained in this 2nd form .
That is, the independent invention includes an opening / closing body that partitions and opens a space, a winding body that winds and unwinds the opening / closing body, and a plurality of pairs that support the winding body from below. In the opening / closing apparatus including the rollers, among the plurality of pairs of rollers, the pair of rollers having a larger load received from the winding body than the other pair of rollers, the interval between the rollers is larger than that of the other pair of rollers. It is characterized by being narrowed.
Here, “a pair of rollers receiving a larger load from the winding body than the other pair of rollers” specifically refers to the pair of rollers closest to the door portion of the opening / closing body or the axial center of the winding body A pair of rollers close to the side can be used.
According to the above-described configuration, winding thickening occurs at a position corresponding to the door portion of the opening / closing body wound around the winding body, and the load applied to the pair of rollers near the winding thickening position is relatively large, Even when the load applied to the pair of rollers close to the center in the axial direction of the winding body becomes relatively large due to the bending of the body, the load applied to each roller constituting the pair of rollers can be reduced.
The pair of rollers is preferably two rollers, but can be three or more rollers.

In the third embodiment , the winding body is formed by connecting a plurality of winding body constituting members in the axial direction, and the support member is provided for each of the plurality of winding body constituting members. that provided.

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.
Further, in this specification, the “opening / closing body opening / closing direction” means a direction in which the opening / closing body moves to partition or open the space.
Further, in this specification, the “opening / closing body thickness direction” means the thickness direction of the opening / closing body in the closed state .

Since the said form is comprised as demonstrated above, there exists an effect as described below.
According to the first aspect , since the support member is disposed at a position avoiding the passage opening and the door portion, when the opening / closing body is wound around the winding body, the winding thickness corresponding to the passage opening and the door portion is obtained. It is possible to prevent the portion from being pressed relatively strongly by the support member. As a result, the vicinity of the door portion of the opening and closing body, the door portion made of a flexible sheet material, etc. may be damaged, or the durability of the support member supporting the winding body may be reduced. Can be prevented.

Furthermore, according to the 2nd form , there exist the following effects.
When a plurality of support members that support the winding body are arranged so as to avoid the passage opening and the door portion, the number of support members disposed per predetermined distance in the winding body axial direction is close to the passage opening and the door portion. Less in parts. Therefore, the support member close to the passage opening and the door portion receives a larger load from the winding body than the other support members.
So, in this 2nd form , about a support member nearest to a passage opening and a door part among a plurality of support members, a roller interval in a pair of rollers which constitute this support member is used as a pair which constitutes another support member. The distance between the rollers is made narrower, and the load received from the winding body by each roller constituting the pair of rollers is reduced.
Therefore, according to this 2nd form , durability of the support member which supports a winding body can be improved further.

Furthermore, according to the third embodiment , the productivity of an opening / closing device that is long in the opening / closing body width direction can be improved, and a portion of the opening / closing body near the door portion or a door portion made of a flexible sheet material. In particular, it is possible to effectively exhibit the effect of preventing the damage of the support member and the durability of the support member that supports the winding body from being deteriorated .

Next, a 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 having a flexible sheet portion 11, a winding body 20 in which an opening direction end portion side of the flexible sheet portion 11 is fixed to an outer peripheral surface, and the opening / closing body 10 having a width thereof. comprising a guide rail for guiding the opening and closing direction at opposite end portions (not shown), are the opening and closing member 10 configured to Ri wound up or unwinding the winding body 20.

  The opening / closing body 10 includes a flexible sheet portion 11 constituting substantially the entire area of the opening / closing body 10, and a fastening member 12 provided at an end of the flexible sheet portion 11 on the opening / closing body opening direction side ( 2) and a seat plate member 15 provided at the end of the flexible sheet portion 11 on the side of the opening / closing body closing direction.

  The flexible sheet portion 11 has a plurality of sheet portion constituent members 11a and 11b connected in the width direction of the opening / closing body so as to correspond to a plurality of winding member constituting members 21 constituting the winding body 20 described later. The adjacent sheet portion constituting members 11a and 11b are connected by a detachable fastening means 13, and a bending in the opening / closing body width direction is formed at the connection location.

Each sheet part constituting member 11a (or 11b) 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, or the like. It consists of a flexible sheet material having fire resistance such as flammability or nonflammability.
The sheet portion constituting member 11a (or 11b) may be configured by sewing a plurality of substantially rectangular belt-like sheet materials so as to be connected to each other, or by cutting one sheet material into a substantially rectangular shape. May be.
The end of each seat part constituting member 11a (or 11b) on the opening / closing body opening direction side is formed in a substantially bag-like longitudinal section so that the fastening member 12 is inserted in the opening / closing body width direction. .

Further, any one of the plurality (three in the illustrated example) of the sheet portion constituting members 11a, 11b, and 11a can open and close the through-passage opening 11b1 and the passage opening 11b1. The door portion 16 that is closed is integrally provided with the seat portion constituting member 11b.
According to the illustrated example, the passage opening 11b1 and the door portion 16 are provided in the seat portion constituting member 11b on the center side in the opening / closing body width direction. However, the inside of the sheet portion constituting members 11a and 11a on both sides is provided. A plurality of the flexible sheet portions 11 may be provided.

The passage opening 11b1 is an opening through which a person or an object can pass, and is formed in a substantially rectangular shape in front view according to the illustrated example.
The passage opening 11b1 may be triangular in front view, circular, cut (slit), or other shapes.

The door part 16 consists of a flame-retardant flexible sheet material similar to the said sheet | seat part structural members 11a and 11b, and is formed in the front view substantially rectangular shape according to the example of illustration.
The door portion 16 hangs down by its own weight when its peripheral edge is overlapped with the peripheral portion of the passage portion 11b1 in the sheet portion constituting member 11b and its upper side portion is fixed to the sheet portion constituting member 11b. , it closes the passage opening 11b1.
Therefore, when the door portion 16 is opened, the lower end side of the door portion 16 may be lifted up or the side portion of the door portion 16 may be turned up.
In addition, although this door part 16 is good also as an aspect arrange | positioned in one surface of the sheet | seat part structural member 11b, and good also as an aspect arrange | positioned in both surfaces of the sheet | seat part structural member 11b, it is an opening / closing body. In order to improve the closing performance according to No. 10, the latter mode is preferable.

And the adjacent sheet | seat part structural members 11a and 11b have the edge part side of the width direction overlapped, and have bending in the opening-and-closing body width direction so that the overlap part 11a1 may release the tension | tensile_strength of an opening-and-closing body width direction. In the state, it is fastened by the fastening means 13.
The overlapping portion 11a1 is appropriately bent so as to enter a space portion between adjacent winding body constituting members 21 and 21.
According to this configuration, even if a tension in the opening / closing body width direction acts on the flexible sheet portion 11 due to wind pressure, vibration, or the like, the tension can be relaxed by the bending of the overlapping portion 11a1. As a result, damage or the like of the flexible sheet portion 11 can be prevented.

The fastening means 13 may be configured, for example, as a so-called snap that fits the concave member and the convex member, or a so-called button that locks the button body through the button hole. it can.
When the fastening means 13 is the snap, the workability when connecting the adjacent sheet portion constituting members 11a and 11a is good, and the closing shielding property when the opening / closing body 10 is closed is effectively used. Can be secured. In addition, since the concave member and the convex member in a connected state can be removed relatively easily, the concave member and the convex shape can be removed even when the opening / closing body 10 is closed, for example, in an emergency. An opening for evacuation or the like can be easily formed by removing the member, and when a strong tension is generated in the flexible sheet part due to a gust of wind or the like, Since the convex member is detached, damage to the flexible sheet portion 11 can be prevented.
Further, when the fastening means 13 is the button, movement of the button body in the opening / closing body width direction can be allowed to some extent by deformation of the button hole, so that the opening / closing body width direction acting on the flexible sheet portion 11 is allowed. Tension can be relaxed.
As other examples of the fastening means 13, a hook-and-loop fastener, a slide fastener, bolts and nuts, magnets, staples, and other engaging / disengaging members may be used.

In addition, a fastening member 12 is inserted in a substantially bag-shaped portion in the longitudinal section on the opening / closing body opening direction side of each of the sheet member constituting members 11a.
The fastening member 12 is a rod-like member having substantially the same length as the winding member constituting member 21 of the winding body 20, and according to a preferred example illustrated, the fastening member 12 is a member having a rectangular cross-section in the longitudinal section.
The material of the fastening member 12 may be a rigid material, and in particular, from the viewpoint of improving fire resistance, it is preferable to use a metal material such as a steel material or a stainless steel material. Or the like.

  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.

The winding member constituting member 21 is a substantially cylindrical member made of a relatively lightweight metal material, and a concave portion 21a for fitting the fastening member 12 is provided on the outer peripheral surface of the winding member constituting member 21. It is formed over the axial direction.
The material of the winding member constituting member 21 is preferably a lightweight metal material such as an aluminum alloy, for example, in order to reduce the weight of the entire winding body 20.

Moreover, the core 23 is arrange | positioned at the both ends of the axial direction of each winding body structural member 21, and is fitted by the internal peripheral surface of each winding body structural member 21. As shown in FIG.
The core 23 is formed of a material having higher fire resistance than the winding body constituting member 21 of the winding body 20, more specifically, a metal material having a melting point higher than that of the winding body constituting member 21. .
For example, when the winding member constituting member 21 is formed of an aluminum alloy, the material of the core 23 is a metal material having a melting point higher than that of the aluminum alloy, such as a steel material or a stainless steel material.

Further, each shaft member 22 is disposed between the adjacent winding body constituting members 21 and 21, and is inserted into and fixed to the adjacent cores 23 and 23 between these winding body constituting members 21 and 21. .
The material of the shaft member 22 is also preferably a steel material, a stainless material, or the like from the viewpoint of strength, fire resistance, and the like.

And the upper end side of the sheet | seat part structural member 11a and the fastening member 12 are fitted by the recessed part 21a of the outer peripheral surface, in the winding body structural member 21 supported by the core 23 from the inside as mentioned above, A fastener 14 (for example, a fire-resistant screw or bolt made of steel, stainless steel, or the like) is inserted into the seat member 11a and the fastening member 12, and the distal end of the fastener 14 is inserted into the core 23. Screwed together.
According to this configuration, even if the winding member constituting member 21 is melted due to an excessive temperature rise during a fire or the like, the sheet member constituting member 11a and the fastening member 12 are constituted by the fastening member 14 to form the winding member. Since it is fixed to the core 23 having a melting point higher than that of the member 21, the winding member constituting member 21 and the core 23 can be prevented from dropping.

  The winding body 20 having the above-described configuration is rotatably received by a plurality of support members 24 and 24 'arranged on the lower side of the winding body 20 in the opening / closing body width direction, and is provided on the axial end portion side. The drive source 25 (for example, an electric motor, an air motor, a manual rotation mechanism, etc.) is rotated in the forward and reverse directions.

Each support member 24 is configured to rotatably support a pair of rollers 24a and 24b arranged substantially horizontally by a bracket 24c.
The support member 24 includes a plurality (three in the illustrated example) of the winding member constituting members 21 and 21 on both sides in the width direction of the opening / closing body at predetermined intervals over the winding member axial direction. It is provided and is fixed to a fixing part on the lower side of the bracket 24c.
The pair of rollers 24 a and 24 b includes a virtual straight line connecting the center of one roller 24 a and the center of the winding body 20, and a virtual straight line connecting the center of the other roller 24 b and the center of the winding body 20. The angle θ1 is set appropriately.

Similarly, each support member 24 ′ is configured to rotatably support a pair of rollers 24a ′ and 24b ′ disposed substantially horizontally by a bracket 24c ′.
A plurality of support members 24 ′ (two in the illustrated example) are provided at predetermined intervals across the winding body axial direction with respect to the winding body constituting member 21 on the center side in the opening / closing body width direction. It is fixed to the fixing part on the lower side of 24c.
The arrangement of the support member 24 ′ will be described in detail. When the flexible sheet portion 11 of the opening / closing body 10 is wound around the winding body 20, the support member 24 ′ has a passage opening 11 b 1 and a door portion. 16 are arranged on both sides of the passage 11b1 and the door 16 so as to avoid 16 in the opening / closing body width direction.
The roller interval between the pair of rollers 24 a ′ and 24 b ′ is set narrower than the roller interval between the pair of rollers 24 a and 24 b constituting the other support member 24.
In other words, the pair of rollers 24 a ′ and 24 b ′ includes an imaginary straight line connecting the center of one roller 24 a ′ and the center of the winding body 20, and the center of the other roller 24 b ′ and the winding body 20. The angle θ <b> 2 with the imaginary straight line connecting with the center of the support member 24 is arranged to be smaller than the angle θ <b> 1 in the support member 24.
For example, the angle θ1 is set to 60 degrees, and the angle θ2 is set to a value smaller than the angle 60 degrees.

  According to the arrangement of the rollers 24a, 24b, 24a ′, and 24b ′ described above, the pair of rollers 24a ′ and 24b ′ receives the load that the pair of rollers 24a ′ and 24b ′ receives from the winding body constituting member 21. The load received from the component member 21 can be made smaller.

This operation will be described in detail. As shown in FIGS. 4A and 4B, a pair of rollers 24a and 24b having a relatively large roller interval and a pair of rollers 24a 'and 24b' having a relatively small roller interval. The load received from the winding body constituting member 21 is different.
That is, in FIGS. 4A and 4B, the weights of the winding member constituting members 21 are substantially the same, and can be represented by a downward vector V having the same length.
In FIG. 4A, the load that the pair of rollers 24a, 24b receives from the winding member constituting member 21 is a component of vector V, and can be expressed as vectors v1, v1, respectively.
Similarly, in FIG. 4B, in FIG. 4A, the load received by the pair of rollers 24a ′ and 24b ′ from the winding member constituting member 21 is a component force of the vector V. It can be expressed as v2 and v2.
When the vector v1 is compared with the vector v2, the angle θ2 between the vectors v2 and v2 is smaller than the angle θ1 between the vectors v1 and v1, and therefore the vector v2 is shorter than the vector v1.

Accordingly, the pair of rollers 24a ′ and 24b ′ having a narrow roller interval is less loaded by each roller than the pair of rollers 24a and 24b having a large roller interval.
The inventor of this application refers to the case where the angle θ1 between the pair of rollers 24a and 24b is 60 degrees, and when the angle is about 50 degrees, the load received by each roller 24a is about 4.4. It has been experimentally confirmed that the load received by each roller 24a can be reduced by about 7.8% when the angle is about 40 degrees.
Note that, according to FIG. 4, in order to clearly show the above-described operation, the roller interval between the rollers 24a and 24b is shown wider than the actual one, and the roller interval between the rollers 24a ′ and 24b ′ is shown smaller than the actual one. .

  Thus, according to the opening / closing device, since the support member is disposed at a position avoiding the passage port 11b1 and the door portion 16, when the flexible sheet portion 11 is wound around the winding body 20, It is possible to prevent the flexible sheet portion 11 from being thickened at a position corresponding to the passage opening 11 b 1 and the door portion 16, and that the thickened portion is relatively strongly pressed by the support member 24.

Moreover, according to the said structure, the number of supporting member 24 'which receives the winding body structural member 21 (winding body structural member 21 of the center side in FIG. 1) corresponding to the passage port 11b1 and the door part 16 is other than that. Although the number of supporting members 24 that receive the winding member constituting member 21 is smaller, as described above, each supporting member 24a ′ can be wound by appropriately setting the distance between the pair of rollers 24a ′ and 24b ′. The load received from the body component 21 is reduced.
Therefore, the load received by the plurality of support members 24, 24 ′ arranged in the opening / closing body width direction from the winding body 20 can be equalized, and the sheet portion constituting member 11b is partially at the support member 24 ′. Can be prevented from being damaged or the durability of the support member 24 'being lowered.

  Each of the support members 24 and 24 ′ is replaced with the pair of rollers 24a and 24b (or 24a ′ and 24b ′), and each winding member constituting member 21 is received and slid from the lower side. It is also possible.

It is a front view which shows typically an example of the switchgear concerning this invention. It is a longitudinal cross-sectional view of the switchgear. (A) is (a)-(a) sectional drawing in FIG. 1, (b) is (b)-(b) sectional drawing in FIG. It is the model which made it show the load which a pair of roller receives from a supporting member, (a) shows the case where a roller space | interval is comparatively wide, (b) shows the case where a roller space | interval is narrower than said (a). .

DESCRIPTION OF SYMBOLS 10: Opening-closing body 11: Flexible sheet part 11a, 11b: Sheet | seat part structural member 20: Winding body 21: Winding body structural member 24, 24 ': Support member 24a, 24b, 24a', 24b ': A pair of Roller 11b1: Passage 16: Door

Claims (5)

A winding body in which the opening / closing body is fixed to the outer peripheral surface, and a support member that rotatably supports the winding body from below, and the opening / closing body is wound or unwound by the winding body. In switchgear,
The opening / closing body is provided with a through-passage opening, and a door made of a flexible sheet material is superimposed on the passage opening and the peripheral portion of the passage opening so as to open and close the passage opening.
The support member is disposed so as to avoid the passage opening and the door portion in the opening / closing body width direction ,
A plurality of the supporting members are provided at predetermined intervals across the axial direction of the winding body, and each supporting member is configured by a pair of rollers that can rotate while contacting the outer peripheral surface of the winding body,
Among the plurality of support members, with respect to the support member closest to the passage port and the door portion, the roller interval between the pair of rollers is narrower than the roller interval between the pair of rollers constituting the other support member. Opening and closing device. The opening / closing body has a flexible sheet portion,
2. The opening / closing apparatus according to claim 1 , wherein the flexible sheet portion is formed by connecting a plurality of sheet portion constituting members in the opening / closing body width direction . The opening and closing device according to claim 2, wherein the passage opening and the door portion are provided in the seat portion constituting member .   The winding body is formed by connecting a plurality of winding body constituent members in the axial direction,
  The opening / closing apparatus according to claim 2 or 3, wherein the plurality of sheet portion constituting members are provided corresponding to the plurality of winding body constituting members, respectively.   The adjacent sheet part constituting members are fixed in a state where the end parts in the width direction are bent so as to release the tension in the opening / closing body width direction. The opening / closing apparatus of any one of Claims.

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