Opening / closing device installation structure

Abstract

To prevent fixing strength from being lowered by flame.SOLUTION: In the wooden skeleton 10, a fastener surrounding area 11 surrounding the inserted fastener 30, a fireproofing layer 12 located outside the fastener surrounding area 11 and having a substantially constant thickness from the exposed surface 10a, and a backing layer 13 located inside the fireproofing layer 12 and continuous with the fastener surrounding area 11 are secured, and the fireproof covering material 20 covers the entire outer surface of the fastener surrounding area 11, and the opening and closing device 100 has a fastened portion fastened to the rear end side of the fastener 30.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an opening and closing device installation structure in which an opening and closing device for opening and closing an opening is installed on a wooden frame. [Background technology]

[0002] In a typical opening and closing device, as described in Patent Document 1, for example, a guide rail for guiding an opening and closing body in a closing direction is fastened to the building frame with fasteners such as screws and bolts. In recent years, large building frameworks are often constructed from wood, and large shutter devices such as heavy shutters are installed on the wooden frameworks. In such an installation structure, if a fire were to break out and the guide rail were to be exposed to flames or heat, there is a possibility that the heat would be transferred from the guide rail to the wooden frame. Wooden structures are generally designed with the surface layer as a fire simmer and the inside of the fire simmer as a wooden base. In such wooden structures, even if the fire simmer is burned by a fire, the remaining wooden base will maintain the minimum necessary strength. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-178568 Summary of the Invention [Problem to be solved by the invention]

[0004] Therefore, a switchgear installation structure has been proposed in which screws for fastening the switchgear are screwed into a wooden frame having the above-mentioned fire margin design. However, even in such an opening and closing device installation structure, if the burning portion is burned in a fire, a gap may be formed between the wooden base and the opening and closing device, which may reduce the fastening strength of the fastening device. [Means for solving the problem]

[0005] In view of the above problems, one aspect of the present invention is provided with the following configuration. a fastener-enclosed area surrounding the inserted fastener; a sub-surface layer that is located outside the fastener-enclosed area and has a substantially constant thickness from the exposed surface; and a base layer that is located inside the sub-surface layer and is continuous with the fastener-enclosed area; the fire-resistant covering material covers the entire outer surface of the fastener-enclosed area; and the open / close device has a fastener-receiving portion that is superimposed on the surface of the fire-resistant covering material and is fixed to the rear end side of the fastener. [Effects of the Invention]

[0006] Since the present invention is configured as described above, it is possible to prevent the fastening strength from being reduced by flames. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a front view showing an example of a switching device installation structure according to the present invention; [Figure 2] FIG. 4 is a cross-sectional view showing a fastening structure for a guide rail of the opening and closing device installation structure. [Figure 3] 1A and 1B show the fastening structure of the fastening bracket of the guide rail, where FIG. 1A is a cross-sectional view and FIG. 1B is a view of FIG. 1A as seen from the front side. [Figure 4] FIG. 4 is a cross-sectional view showing the fastening structure of the pivot bracket. [Figure 5] 10A and 10B show another example of the fastening structure of the fastening bracket, in which (a) is a cross-sectional view and (b) is a view of (a) as seen from the front side. [Figure 6] 10 is a cross-sectional view of a main part showing another example of a switchgear installation structure according to the present invention. FIG. [Figure 7] 10 is a cross-sectional view of a main part showing another example of a switchgear installation structure according to the present invention. FIG. [Figure 8] FIG. 8 is a cross-sectional view of FIG. 7 showing a state before the components are assembled. [Figure 9] 10 is a cross-sectional view of a main part showing another example of a switchgear installation structure according to the present invention. FIG. [Figure 10] 10 is a cross-sectional view of a main part showing another example of a switchgear installation structure according to the present invention. FIG. [Figure 11] 10 is a cross-sectional view of a main part showing another example of a switchgear installation structure according to the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] Next, an embodiment of the present invention will be described in detail with reference to the drawings. In this specification, the "width direction of the opening / closing body" means a direction that is substantially perpendicular to the opening / closing direction of the opening / closing body, and is not the thickness direction of the opening / closing body. Additionally, the "outer side in the width direction of the opening / closing body" refers to the side facing the outside of the opening / closing body along the width direction of the opening / closing body, and the "inner side in the width direction of the opening / closing body" refers to the side facing the inside of the opening / closing body along the width direction of the opening / closing body.

[0009] First Embodiment 1 to 3 show an example of a switchgear installation structure according to the present invention. This opening and closing device installation structure 1 comprises a wooden structure 10 having an exposed surface 10a, a fire-resistant covering material 20 covering the surface of the wooden structure 10, a fastener 30 inserted into the wooden structure 10 through the fire-resistant covering material 20, and an opening and closing device 100 fixed by the fastener 30 so as to open and close an opening in the wooden structure 10.

[0010] The opening and closing device 100 comprises an opening and closing body 40 that performs a closing operation to separate a space, left and right guide rails 50, 50 that guide the opening and closing body 40 in the opening and closing direction, and a storage section 60 that extends and stores the opening and closing body 40 (see Figure 1).

[0011] The opening / closing body 40 is made up of a plurality of slats connected together so as to be able to rotate between the top and bottom, and is sometimes called a slat shutter curtain. The slats are made by bending a horizontally elongated, generally rectangular metal plate. Other examples of this opening / closing body 40 include a form made of a fire-resistant flexible sheet, a form made of multiple panels, a form in which multiple pipes are arranged at intervals above and below, and a form made of an appropriate combination of slats, flexible sheets, panels, pipes, etc.

[0012] Each guide rail 50 is a long member that continues vertically on the widthwise end side of the opening / closing body 40, and guides the widthwise end of the opening / closing body 40 in the opening / closing direction. This guide rail 50 functions as a fastening portion that is placed on the surface of the fire-resistant covering material 20 and fixed to the rear end side of the fastener 30.

[0013] In more detail, the guide rail 50 (attachment portion) is hollow and integrally comprises a rail body 51 that guides the opening / closing body 40 in the vertical direction, a reinforcing piece 52 that reinforces the rail body from the inside, and an attachment bracket 53 for attaching the rail body 51 to the surface of the fire-resistant covering material 20 (see Figure 2).

[0014] The rail body 51, the reinforcing piece 52, the fastening bracket 53, etc. are formed from a hard metal material (for example, steel, stainless steel, aluminum alloy, etc.).

[0015] The rail body 51 is formed in a hollow, elongated shape with a concave cross section that surrounds the widthwise end of the opening / closing body 40 and continues in the vertical direction.

[0016] The reinforcing piece 52 is formed in a generally plate-like shape that spans the inner walls of the rail body 51 and reinforces the rail body 51 from the inside.

[0017] The fastening bracket 53 has a generally concave cross section that extends vertically in a long, continuous manner, with a plate-shaped portion 53a that overlaps the surface of the fire-resistant covering material 20 and protruding pieces 53b, 53b that protrude forward from both the left and right ends of the plate-shaped portion 53a. Before the rail body 51 is assembled, the fastening bracket 53 is immovably fixed to the fire-resistant covering material 20 and the wooden skeleton 10 by a fastening tool 30 described later.

[0018] The rail body 51 is placed on the protruding pieces 53b, 53b on both sides of the fastening bracket 53 from the outside and fixed by fasteners 54 (for example, screws, bolts, etc.).

[0019] In FIG. 2, reference numeral 55 denotes a filler that fills the recessed gap between the rail body 51 and the fire-resistant covering material 20, improving the design of the entire guide rail 50.

[0020] The storage section 60 comprises a winding shaft 61 that winds and unwinds the opening / closing body 40, support brackets 62, 62 that support the winding shaft 61 at both ends, an opening / closing device 63 that drives and rotates the winding shaft 61, and a winding shaft case 64 that covers the periphery of the winding shaft 61 in the width direction. In this storage section 60, the winding shaft 61 is rotated by an opening / closing device 63, and the opening / closing body 40 is pulled downward for a closing operation or pulled upward for an opening operation for storage.

[0021] Each support bracket 62 functions as a fastening part that is placed on the surface of the fire-resistant covering material 20 and fixed to the rear end side of the fastener 30. This support bracket 62 (attachment portion) is formed in a roughly L-shape in plan view, having a roughly flat support main body portion 62a that supports the end side of the winding shaft 61, and an attachment piece 62b that is shaped such that the wooden structure 10 side of this support main body portion 62a is bent inward in the width direction of the opening / closing body (see Figure 4). In the drawing, reference numeral 62c denotes a reinforcing piece formed by bending the upper end side of the support body outward in the width direction of the opening / closing body.

[0022] The mounting piece 62b is formed in the shape of a rectangular flat plate that is long in the vertical direction, and is placed on the surface of the fire-resistant covering material 20. A plurality of fasteners 30 are inserted into the mounting piece 62b at intervals in the vertical direction. Each fastener 30 penetrates the mounting piece 62b and the fire-resistant covering material 20, and is screwed into the wooden skeleton 10.

[0023] The guide rail 50 and the pivot bracket 62 in the opening and closing device 100 having the above-described configuration are fixed to the wooden skeleton 10 via the fire-resistant covering material 20, respectively.

[0024] The wooden skeleton 10 is a wooden part that constitutes a building on which the opening and closing device 100 is to be installed. For example, the wooden structure 10 shown in Figure 2 is a wooden pillar with a rectangular cross section that continues vertically. The upper end of this wooden structure 10 is fixed to an immovable part on the floor side, and the other end is fixed to an immovable part on the ceiling side.

[0025] The wooden skeleton 10 illustrated in FIG. 4 is a wooden wall material, beam material, or the like, and is configured in the shape of a wall that hangs down above the opening that is opened and closed by the opening and closing device 100.

[0026] In the illustrated example, the wooden skeleton 10 is made of solid wood, but other examples of the wooden skeleton 10 may include laminated wood, laminated wood, plywood, etc., instead of solid wood.

[0027] The exposed surface 10a of the wooden skeleton 10 is the surface located on the outermost layer side. The exposed surface 10a is the surface where the wood is exposed, and is covered with a transparent coating such as varnish as necessary.

[0028] The wooden structure 10 is provided with a fastener surrounding area 11 that surrounds and fixes the inserted fastener 30, a non-burning layer 12 that is located outside the fastener surrounding area 11 and has a substantially constant thickness from the exposed surface 10a, and a base layer 13 that is located inside the non-burning layer 12 and is continuous with the fastener surrounding area 11.

[0029] The fastener-enclosed area 11 is located on the back side of the fire-resistant covering material 20 so that it will not burn even if the fuel layer 12 burns in the event of a fire, and is located at a distance of at least the thickness dimension A of the fuel layer 12 from the surface of the fuel layer 12 (see Figure 2). The fastener-enclosed region 11 is continuous in the vertical direction with the rectangular cross section containing the fastener 30 therein.

[0030] The horizontal thickness dimension X of the fastener-enclosing region 11 is the sum of the diameter D of the fastener 30 to be screwed in, the dimension B of one horizontal side adjacent to the fastener 30, and the dimension C of the other horizontal side adjacent to the fastener 30, as illustrated in FIG. The dimensions B and C are appropriately set so that the fastener 30 to be screwed in has sufficient fastening strength.

[0031] The burning material layer 12 is an area that is expected to be burned in the event of a fire. This fuel-burning layer 12 is ensured to have a predetermined thickness dimension A from the exposed surface 10a (see the area indicated by the two-dot chain line in FIG. 2). The fastener-surrounding area 11 is located on the back side of the fire-resistant covering material 20 and is not directly exposed to the flames, and is therefore distinguished from the substitute fire layer 12.

[0032] The thickness dimension A of the substitute fire layer 12 is appropriately set based on the Building Standards Act, the Ministry of Construction Notification, etc. so that it will not burn out for a certain period of time even if it is burned by flames. For example, when the carbonization rate is set to 1 mm / min and a quasi-fireproof structure that can withstand a fire for 45 minutes without collapsing is obtained, the thickness dimension A of the substitute burn layer 12 is set to 45 mm or more.

[0033] The base layer 13 is a wooden area that is continuous with the fastener-surrounding area 11 inside the substitute burn layer 12. The base layer 13 is continuous in the vertical direction over substantially the entire length of the wooden skeleton 10.

[0034] In the case where a fire breaks out and the fuel layer 12 burns out, the wooden frame 10 having the above-described configuration is designed to ensure the necessary structural strength by the fastener-enclosed area 11 and the base layer 13.

[0035] The fire-resistant covering material 20 is a plate-shaped building material (such as gypsum board or calcium silicate board) that has fire resistance and heat insulation properties, and prevents heat and flames from being transmitted to the wooden skeleton 10 in the event of a fire. This fire-resistant covering material 20 covers the entire outer surface of the fastener-enclosing area 11 so as to extend from the surface of the fastener-enclosing area 11 to the surfaces of the sub-combustible layers 12 on both sides.

[0036] As shown in Figures 2 and 3, the width dimension α of the fire-resistant covering material 20 is set to be equal to or greater than the width dimension X (= B + D + C) of the fastening device surrounding area 11 plus twice the thickness A of the burnable layer 12, and to be approximately the same value as the width dimension of the guide rail 50 (the fastening portion).

[0037] 4, the width dimension α of the fire-resistant covering material 20 is set to be equal to or greater than the width dimension X (= B+D+C) of the fastener-enclosed region 11 plus twice the thickness A of the substitute combustion layer 12. In this example, the width dimension of the pivot bracket 62 (the fastening portion) is set to be smaller than the width dimension of the fire-resistant covering material 20.

[0038] In the example shown in Figure 4, the mounting piece 62b may be formed wider than in the illustrated example so that the overall width dimension of the support bracket 62 (attached portion) is approximately the same as the width dimension of the fire-resistant covering material 20.

[0039] The fasteners 30 are metal wood screws, and a plurality of fasteners 30 are arranged at intervals in the vertical direction. 2 and 3, each fastener 30 penetrates the plate-shaped portion 53a and the fire-resistant covering material 20 and is screwed into the fastener-surrounded area 11 of the wooden skeleton 10. Also, as shown in FIG. 4, each fastener 30 penetrates the mounting piece 62b and the fire-resistant covering material 20, and is screwed into the fastener-surrounded area 11 of the wooden skeleton 10. As other examples of the fastener 30, fasteners other than wood screws, such as nails or anchor members, may also be used.

[0040] Therefore, according to the opening and closing device installation structure 1 shown in Figures 1 to 4, even if a fire occurs and the fastening portion of the opening and closing device 100 (guide rail 50 and support bracket 62) or the wooden structure 10 is exposed to the flames, it is possible to prevent the fastening device-enclosed area 11 in the wooden structure 10 from being burned and the fastening strength of the fastening device 30 from being reduced.

[0041] <Second embodiment> Next, another embodiment of the present invention will be described. The embodiment described below is a partial modification of the above-described switchgear installation structure 1, so the modified parts will be mainly described in detail, and overlapping detailed descriptions will be omitted.

[0042] FIG. 5 shows another example of the fastening structure of the fastening bracket 53 on the guide rail 50. In FIG. In this embodiment, the fastening bracket 53 is fastened to the wooden frame 10 by a plurality of fasteners 30 arranged in a staggered pattern within the fastener-enclosed area 11 .

[0043] That is, the fasteners 30 are arranged in two rows at a predetermined interval w in the horizontal direction. A plurality of fasteners 30 in one row are arranged at a predetermined interval in the vertical direction. A plurality of fasteners 30 in the other row are arranged at a predetermined interval in the vertical direction, at positions vertically shifted from the fasteners 30 in the one row.

[0044] The two rows of fasteners 30 are located within the width dimension X of the fastener-enclosed area 11 (see FIG. 5). The fasteners 30 in one row are provided at positions where the width dimension α of the fire-resistant covering material 20 is divided into width dimension α1 and width dimension α2. The fasteners 30 in the other row are provided at positions where the width dimension α of the fire-resistant covering material 20 is divided into width dimension α1' and width dimension α2'. α, α1, α2, α1', and α2' are set so as to satisfy the relational expressions shown in FIG.

[0045] Therefore, in the fastening structure shown in FIG. 5, substantially the same effects as those of the opening and closing device installation structure 1 can be obtained, and the fastening strength of the guide rail 50 can be further improved. Although not shown, in the fastening structure of the pivot bracket 62 (see FIG. 4), the fasteners 30 can also be similarly arranged in a staggered pattern so as to be positioned within the fastener-enclosed area 11.

[0046] <Third embodiment> FIG. 6 shows a switchgear installation structure 1 in which a part of the remaining exposed surface 10a is covered with a substitute material 15 separate from the wooden skeleton 10 so as to be substantially flush with the fire-resistant covering material 20.

[0047] That is, in the switchgear installation structure 1, the front side of the wooden skeleton 10 is composed of a surface covered with a fire-resistant covering material 20 and an exposed surface 10a that exposes the wood of the wooden skeleton 10 (see FIG. 2). In the embodiment of FIG. 6, the exposed surface 10a is covered with a burning substitute material 15.

[0048] The burner member 15 is a plank-shaped wooden piece made of the same material as the wooden skeleton 10, and has substantially the same wood grain as the surface of the wooden skeleton 10 on the front surface. The burner member 15 is fixed to the wooden skeleton 10 by a plurality of fasteners 15a (for example, screws, nails, etc.) that are inserted therethrough.

[0049] Therefore, according to the embodiment shown in FIG. 6, substantially the same effects as those of the above-described opening and closing device installation structure 1 can be obtained, and the thickness of the substitute combustion layer 12 on the side where the guide rail 50 (attached portion) is fastened can be increased by the substitute combustion member 15. Therefore, even if a fire occurs in the space on the opening and closing device 100 side of the wooden skeleton 10, the time until the substitute fuel material 15 and the substitute fuel layer 12 burn out can be extended, and the strength of the wooden skeleton 10 can be maintained for a long time. Moreover, since there is no step between the fire-resistant covering material 20 and the substitute fire member 15, it is also excellent in design.

[0050] <Fourth embodiment> In the embodiment shown in FIGS. 7 and 8, the fire-resistant covering material 20 is embedded in a wooden skeleton 10'.

[0051] The wooden skeleton 10' is obtained by forming a recess 10b in the wooden skeleton 10 so that the fire-resistant covering material 20 can be embedded flush with the surface. The recess 10b is located on the surface side of the fastener-enclosed region 11, and has a concave cross section that opens on the front side and continues in the vertical direction so that the fire-resistant covering material 20 can be fitted therein.

[0052] The assembly method for this embodiment will be described below. First, the fire-resistant covering material 20 is fitted into the recess 10b, and then the fastening bracket 53 is placed on the surface of the fire-resistant covering material 20, as shown in FIG. Then, the fastening tool 30 is inserted through the fastening bracket 53 and the fire-resistant covering material 20, and the male thread portion of this fastening tool 30 is screwed into the wooden skeleton 10' and tightened. Thereafter, the rail body 51 is fitted into the fastening bracket 53 and fastened by a fastener (not shown).

[0053] Therefore, according to the embodiment of Figs. 7 and 8, substantially the same effects as those of the above-described switchgear installation structure 1 can be obtained, and in addition, the fire-resistant covering material 20 can be easily positioned during the assembly work. Moreover, the fire-resistant covering material 20 does not protrude forward, and no step is created between the fire-resistant covering material 20 and the substitute fire layer 12, so that the design is also excellent.

[0054] <Fifth embodiment> In the embodiment shown in Figure 9, the fire-resistant covering material 20 that covers the outer surface of the fastener-enclosed area 11 and protrudes forward is covered by a guide rail 50' that is part of the opening and closing device 100 so that it is not exposed to the outside.

[0055] The guide rail 50' is the above guide rail 50, with a concave cover 50a provided thereon.

[0056] The concave covering portion 50a covers the front and both side surfaces of the fire-resistant covering material 20 with the back surface of the fastening bracket 53 and the inner surfaces on both sides of the rail main body 51, and is formed to fit concavely into the fire-resistant covering material 20.

[0057] The upper end of the fire-resistant covering material 20 that is not covered by the concave covering portion 50a is covered by a metal member (for example, a lintel member or a case that constitutes the storage section 60) above the guide rail 50. The lower end of the fire-resistant covering material 20 is covered by a metal sill or door rail. As another example, metal plate-shaped portions that cover the upper and lower ends of the fire-resistant covering material 20 may be integrally provided on the upper and lower end sides of the concave covering portion 50a.

[0058] 9, in addition to being able to obtain substantially the same effects as the above-described switchgear installation structure 1, in the unlikely event of a fire, the guide rail 50' can prevent the fire-resistant covering material 20 from being directly exposed to the flames. As a result, it is possible to more effectively reduce the reduction in the fastening strength of the fastener 30.

[0059] Sixth Embodiment In the embodiment shown in FIG. 10, the fire-resistant covering material 20 covering the outer surface of the fastener-enclosed area 11 is covered by a concave covering portion 62d that is part of the support bracket 62' so as not to be exposed to the outside. The pivot bracket 62' is the pivot bracket 62 in which the mounting piece 62b is replaced with a concave cover portion 62d.

[0060] The concave covering portion 62d covers the front and both side surfaces of the convex fire-resistant covering material 20, and is formed to also cover the upper and lower ends of the fire-resistant covering material 20, although this is not shown. According to the illustrated example, the concave cover portion 62d is formed in a concave shape from a plurality of metal pieces, but it is also possible to use a single metal piece processed into a concave shape.

[0061] The concave covering portion 62d fits concavely into the fire-resistant covering material 20. The fastener 30 penetrates the concave covering portion 62d and the fire-resistant covering material 20 and is screwed into the wooden skeleton 10.

[0062] 10, in addition to being able to obtain substantially the same effects as the above-described switchgear installation structure 1, in the unlikely event of a fire, the support bracket 62' can prevent the fire-resistant covering material 20 from being directly exposed to the flames. As a result, it is possible to more effectively reduce the reduction in the fastening strength of the fastener 30.

[0063] Seventh Embodiment In the embodiment shown in FIG. 11, the fire-resistant covering material 20 covering the outer surface of the fastener-enclosing area 11 is covered by a case portion constituting a storage portion 60' so as not to be exposed to the outside. The storage section 60' is configured by replacing the winding shaft case 64 of the storage section 60 with a case section 65 that covers the winding shaft 61, the support brackets 62, 62, the opening / closing mechanism 63, and the like.

[0064] The case portion 65 is formed in a box shape with an opening on the wooden frame 10 side, and is attached so as to fit onto the outside of the support brackets 62, 62 on both sides. This case portion 65 covers the fire-resistant covering materials 20, 20 on both the left and right sides so as not to be exposed to the outside.

[0065] 11, in addition to being able to obtain substantially the same effects as those of the above-described switchgear installation structure 1, in the unlikely event of a fire, the case portion 65 can prevent the fire-resistant covering material 20 from being directly exposed to the flames. Consequently, it is possible to more effectively reduce the reduction in the fastening strength of the fastener 30.

[0066] In the embodiment of Figure 11, the fire-resistant covering material 20 is covered by the case portion 65, but as another example, in the above-mentioned opening and closing device installation structure 1, it is also possible for the winding shaft case 64 to cover the fire-resistant covering material 20, or for other parts constituting the storage portion 60 to cover the fire-resistant covering material 20.

[0067] Furthermore, the present invention is not limited to the specific configurations described above, and can be modified as appropriate within the scope of the present invention.

[0068] <Summary> As described above, the above embodiments disclose the following inventions. (1) a fastener-enclosed area surrounding the inserted fastener; a sub-burning layer located outside the fastener-enclosed area and having a substantially constant thickness from the exposed surface; and a base layer located inside the sub-burning layer and continuous with the fastener-enclosed area; the fire-resistant covering material covering the entire outer surface of the fastener-enclosed area; and the open / close device having a fastener-receiving portion superimposed on the surface of the fire-resistant covering material and fixed to the rear end side of the fastener (see Figs. 1 to 11). (2) The opening and closing device installation structure described in (1) is characterized in that the width dimension of the fire-resistant covering material is set to a value equal to or greater than the width dimension of the fastener-enclosed area plus twice the thickness of the substitute fire layer (see Figures 3 to 5). (3) The opening and closing device installation structure described in (1) or (2) is characterized in that the fire-resistant covering material is formed to have a width that is approximately the same as the width dimension of the fastening portion (see Figures 2, 6, 9 and 10). (4) The opening and closing device installation structure according to any one of (1) to (3) (see FIG. 5), characterized in that the fasteners are arranged in a plurality of rows in a staggered pattern so as to be positioned within the fastener-enclosed area. (5) An opening and closing device installation structure according to any one of (1) to (4) (see FIG. 6), characterized in that at least a portion of the remaining exposed surface is covered with a substitute material that is separate from the wooden structure so as to be approximately flush with the fire-resistant covering material. (6) The switchgear installation structure according to any one of (1) to (5) (see FIG. 7), wherein the fire-resistant covering material is embedded in the wooden skeleton. (7) The opening / closing device installation structure described in any one of (1) to (6) is characterized in that the fire-resistant covering material is covered by a part of the opening / closing device so as not to be exposed to the outside (see Figures 9, 10 and 11). (8) The opening and closing device installation structure described in any one of (1) to (7) is characterized in that the opening and closing device comprises an opening and closing body that opens and closes the opening of the wooden structure, and a guide rail that guides the opening and closing body in the opening and closing direction, and the fastening portion is the guide rail (see Figures 2, 3, and 5 to 9). (9) The opening and closing device installation structure described in any one of (1) to (7) is characterized in that the opening and closing device comprises an opening and closing body that opens and closes the opening of the wooden structure, a winding shaft that winds up and unwinds the opening and closing body, and a support bracket that supports the winding shaft, and the fastening part is the support bracket (see Figures 4 and 10). [Explanation of symbols]

[0069] 1: Switchgear installation structure 10:Wooden frame 10a: Exposed surface 11: Fastener surrounding area 12: Burning layer 13: Base layer 30: Fastener 40: Opening and closing body 50: Guide rail (attached part) 50a: Concave cover 53: Fastening bracket 60: Storage area 62: Axial support bracket (attached part) 62b: Mounting piece 62d: Concave cover 100: Switchgear

Claims

1. a wooden skeleton having an exposed surface; a fire-resistant covering material covering the surface of the wooden skeleton; a fastener inserted into the wooden skeleton through the fire-resistant covering material; and an opening / closing device fixed by the fastener to open and close an opening in the wooden skeleton; The wooden skeleton is provided with a fastener-enclosing area surrounding the inserted fastener, a fuel-susceptible layer located outside the fastener-enclosing area and having a substantially constant thickness from the exposed surface, and a base layer located inside the fuel-susceptible layer and continuing to the fastener-enclosing area, the fire-resistant covering material covers the entire outer surface of the fastener-enclosed area, The opening and closing device has a fastening portion that is superimposed on the surface of the fire-resistant covering material and fixed to the rear end side of the fastener.

2. 2. The opening and closing device installation structure according to claim 1, wherein the width dimension of the fire-resistant covering material is set to a value equal to or greater than the width dimension of the fastener-enclosed area plus twice the thickness of the substitute combustion layer.

3. 2. The switchgear installation structure according to claim 1, wherein the fire-resistant covering material is formed to have a width substantially equal to the width of the fastening portion.

4. 2. The opening / closing device installation structure according to claim 1, wherein the fasteners are arranged in a plurality of rows in a staggered pattern so as to be positioned within the fastener-enclosed area.

5. 2. The opening and closing device installation structure according to claim 1, wherein at least a portion of the remaining exposed surface is covered with a burner member separate from the wooden structure so as to be substantially flush with the fire-resistant covering material.

6. 2. The switchgear installation structure according to claim 1, wherein the fire-resistant covering material is embedded in the wooden frame.

7. 2. The switchgear installation structure according to claim 1, wherein the fire-resistant covering material is covered by a part of the switchgear so as not to be exposed to the outside.

8. The opening and closing device includes an opening and closing body that opens and closes the opening of the wooden skeleton, and a guide rail that guides the opening and closing body in an opening and closing direction, 8. The opening and closing device installation structure according to claim 1, wherein the fastening portion is the guide rail.

9. The opening and closing device includes an opening and closing body that opens and closes the opening of the wooden skeleton, a winding shaft that winds up and unwinds the opening and closing body, and a support bracket that supports the winding shaft, 8. The opening and closing device installation structure according to claim 1, wherein the fastening portion is the pivot bracket.

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