Refractory structure

Abstract

To improve workability when a timber to be a burning marginal layer is fixed.SOLUTION: A fireproof structure of a building has a building structure 10 and a burning marginal material 5 forming a burning marginal layer. The burning marginal material 5 includes at least an L-shaped burning marginal material 51 that has L shape in plan view and covers a projected corner part of the building structure 10. A counterbore part 11 can be formed of a cutout part 50 of one burning marginal material 5 and a cutout part 50 of the other burning marginal material 5 adjacent to the one burning marginal material 5 by providing the cutout part 50 on ends of the burning marginal material 5. A fixing material 6 for fixing the burning marginal material 5 to the building structure 10 can be provided from the cutout part 50 toward a core material (a stile material A, an auxiliary bar member B, a column material, a beam material, an adjustment material 3 and others) constituting the building structure 10.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a fire-resistant structure of a building.

Background Art

[0002] Conventionally, there is known a wooden building member having a load-bearing part made of wood, a char layer (wood serving as the char layer) covering the load-bearing part, a fire-stop layer (gypsum board) provided between the load-bearing part and the char layer, a heat-expandable material provided between the fire-stop layer and the char layer, and a plurality of spacers disposed in a portion where the heat-expandable material is provided (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In Patent Document 1, the wood serving as the char layer is a plate material having a rectangular shape, and no member or the like for positioning the wood is provided. The wood serving as the char layer is only fixed to the fire-stop layer via a rectangular bar-shaped spacer. Therefore, it is difficult to fix the wood serving as the char layer at a predetermined position.

[0005] The present invention has been made in view of the above circumstances, and the problem thereof is to improve the workability when fixing the wood serving as the char layer.

Means for Solving the Problems

[0006] The invention according to claim 1 is, for example, as shown in FIGS. 1 to 14, a fire-resistant structure of a building, a building structure 10, It comprises a combustible material 5 that forms a combustible layer, The aforementioned burnable material 5 includes at least an L-shaped burnable material 51 that is L-shaped in plan view and covers the outer corner of the building structure 10. fruit, A notch 50 is provided at the end of the burnt material 5. The counter-cut portion 11 is formed by the notch 50 of one of the burnt material 5 and the notch 50 of the other burnt material 5 adjacent to the one burnt material 5. It is characterized by the following:

[0007] According to the invention described in claim 1, the burn-off material 5 includes at least an L-shaped burn-off material 51 that can be positioned simply by contacting it with the outer corner of the building structure 10. Therefore, the burn-off material 5 can be fixed in a predetermined position simply by fixing the L-shaped burn-off material 51 while it is in contact with the outer corner of the building structure 10 (either directly or via a spacer 9, etc.), thereby improving the workability when fixing the wood (burn-off material 5) that will form the burn-off layer. Furthermore, since the counter-cut portion 11 can be created simply by making a notch at the end of the burnt-out material 5 without performing counter-cutting or other processing, the counter-cut portion 11 can be easily formed.

[0010] Claim 2 The invention described above is as shown, for example, in Figures 4, 5, 6, 9, 10, 12, 13, and 14, according to the claims. 1 In the fire-resistant structure described above, The fixing member 6 for fixing the burnable material 5 to the building structure 10 is characterized in that it is provided from the notch 50 toward the core material (frame material A, auxiliary cross material B, column material, beam material, adjustment material 3, etc.) that constitutes the building structure 10.

[0011] Claim 2 According to the invention described above, since the burnable material 5 is fixed to the core material of the building structure 10, the burnable material 5 can be firmly fixed and that firm fixed state can be maintained.

[0012] Claim 3 The invention described is, for example, as shown in Figure 6, 2 In the fire-resistant structure described above, The aforementioned L-shaped burnable material 51 is A first opposing portion 51a facing one of the surfaces forming the aforementioned corner portion, It includes a second opposing portion 51b that faces the other surface forming the corner portion, The length L2 of the portion of the second opposing portion 51b excluding the notch portion 50 is, It is characterized by being longer than the difference L4 between the length of the fixing material 6 provided from the notch portion 50 of the first opposing portion 51a and the thickness L3 of the notch portion 50.

[0013] Claim 3 According to the invention described in the claim, the fixing material 6 provided from the notch portion 50 of the first opposing portion 51a and the fixing material 6 provided from the notch portion 50 of the second opposing portion 51b do not collide. Therefore, since there is no need to consider such a collision when providing the fixing material 6, the workability when fixing the wood (combustible material 5) that becomes the combustible layer can be improved.

[0014] Claim 4 The invention described in the claim is, for example, as shown in FIGS. 2, 4, 5, 7, 9, 10, 12, 13, 14, in the fireproof structure described in the claim 1 wherein, A joint cover 7 that fits into the recessed portion 11 is attached to the recessed portion 11, The joint cover 7 is characterized by being pre-fixed to a decorative material 8 that covers the combustible material 5.

[0015] Claim 4 According to the invention described in the claim, the decorative material 8 can be positioned simply by fitting the joint cover 7 fixed to the decorative material 8 into the recessed portion 11, so that the positioning of the decorative material 8 with respect to the combustible material 5 is easy.

[0016] Claim 5 The invention described in the claim is, for example, as shown in FIGS. 11 to 14, in the fireproof structure described in claim 1, A spacer 9 for forming a gap therebetween is provided between the building structure 10 and the combustible material 5, which is characterized in that.

[0017] Claim 5According to the invention described, it becomes easier to keep the building structure 10 and the fuel bed material 5 in a dry state.

[0018] Claim 6 The invention described in, for example, as shown in FIGS. 11 to 14, claim 5 the fireproof structure, the building structure 10 includes a wooden framework structural material (such as building panels (such as building wall panels 2), column materials, beam materials, adjusting materials 3, etc.) that constitutes the framework of the building, and a fireproof coating material 4 that covers the framework, the spacer 9 is a non-combustible member, and is disposed at a position closing the boundary between the fireproof coating materials 4 that are perpendicular to each other.

[0019] Claim 6 According to the invention described, since the wooden framework structural material is covered with the fireproof coating material 4, the fireproof performance is high. Furthermore, since the non-combustible spacer 9 is disposed at a position closing the boundary between the fireproof coating materials 4 that are perpendicular to each other, the fireproof performance is high.

Effect of the Invention

[0020] According to the present invention, the workability when fixing the wood (fuel bed material 5) that becomes the fuel bed layer can be improved.

Brief Explanation of the Drawings

[0021] [Figure 1] It is a perspective view showing an example of a wall in a state before attaching the decorative material. [Figure 2] It is a perspective view showing an example of a wall in a state after attaching the decorative material. [Figure 3] It is an exploded cross-sectional view showing an example of a wall. [Figure 4] It is a cross-sectional view showing an example of a wall in a state before attaching the decorative material. [Figure 5] It is a cross-sectional view showing an example of a wall in a state after attaching the decorative material. [Figure 6] This is a diagram to explain the dimensions of various parts. [Figure 7] This figure shows a modified example of a cosmetic material. [Figure 8] First modified example: This is an exploded cross-sectional view showing an example of a wall. [Figure 9] First variation: A cross-sectional view showing an example of a wall before the decorative material is installed. [Figure 10] First modified example: A cross-sectional view showing an example of a wall after decorative material has been installed. [Figure 11] Second modified example: This is an exploded cross-sectional view showing an example of a wall. [Figure 12] Second variation: A cross-sectional view showing an example of a wall before the decorative material is installed. [Figure 13] Second modified example: A cross-sectional view showing an example of a wall after decorative material has been installed. [Figure 14] Second modified example: A cross-sectional view showing another example of a wall after decorative material has been installed. [Modes for carrying out the invention]

[0022] Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below are subject to various technically preferred limitations for carrying out the present invention, but the technical scope of the present invention is not limited to the following embodiments (and modifications) or illustrated examples. Note that the directions (front-back direction, left-right direction, up-down direction) in the following embodiments (and modifications) and illustrated examples are set solely for the convenience of explanation.

[0023] In Figures 1 to 5, reference numeral 1 indicates a wall of the building. The building is constructed using a panel construction method in which building components such as walls, floors, and roofs are pre-fabricated in a factory and assembled at the construction site. However, it is not limited to this method, and the building may also be constructed using conventional methods such as post-and-beam construction, wall-type construction, or two-by-four construction. Furthermore, a panel is a building panel in which vertical and horizontal frame members A are assembled in a rectangular shape to form a rectangular frame, and auxiliary cross members B are assembled vertically and horizontally inside this rectangular frame to form a frame body, and face material C is attached to both sides or one side of this frame body, resulting in a hollow structure. Insulation material such as glass wool or rock wool is usually installed in the hollow part inside (the back side of face material C).

[0024] In other words, in this embodiment, the building frame is composed of building panels such as building wall panels 2, building floor panels, and building roof panels, as well as columns, beams, and adjustment members 3. The structural materials that make up the frame (building panels, columns (column materials), beams (beam materials), adjustment members 3, etc.) are covered with fire-resistant covering material 4 to form the walls, floors, and ceilings of the building. The fire-resistant coating material 4 in this embodiment is reinforced gypsum board, but is not limited to this, and may be other types of fire-resistant coating materials. Furthermore, in this embodiment, the building structure is covered with a single fire-resistant covering material 4, but it is not limited to this, and may be covered with multiple layers of fire-resistant covering material 4.

[0025] The wall 1 of this embodiment is composed of a building structure 10 having wooden structural materials (building wall panels 2, columns, adjustment materials 3, etc.) that constitute the frame of the building and a fire-resistant covering material 4 that covers the frame, and wooden burn-through material 5 that forms a burn-through layer. The thickness dimension of the burnable material 5 (burnable layer) is set to the dimension determined using a known burnable design.

[0026] The burnable material 5 includes at least two types: an L-shaped burnable material 51 that is L-shaped in plan view, and an I-shaped burnable material 52 that is I-shaped in plan view. The end of the burnt material 5 (the end adjacent to another burnt material 5) is notched in an L-shape in plan view (the notched portion (thin-walled portion) will be hereinafter referred to as the "notch 50"). That is, the end of the burnt material 5 has a notch 50 along that end (in this embodiment, along the vertical direction). Then, a recessed groove-shaped counterbore 11 that opens outward is formed by the notch 50 of one of the two adjacent burnt material 5 and the notch 50 of the other burnt material 5.

[0027] In other words, the fixing material 6 (screws, etc.) for fixing the flammable material 5 to the building structure 10 is driven in from the notch 50 of the flammable material 5 toward the building structure 10. The fixing material 6 is preferably driven into the structural material of the building structure 10 (frame structural material, fire-resistant covering material 4), and more preferably into the core material that constitutes the structural material. The core material is the frame material A or auxiliary cross material B of the building panel, a column (column material), a beam (beam material), an adjustment material 3, etc. By fixing the flammable material 5 to the core material, the flammable material 5 can be firmly fixed and that firm fixed state can be maintained.

[0028] The Type I flammable material 52 covers the surface (left and right sides) of the building structure 10. On the other hand, the L-shaped burn-off material 51 covers the outer corner of the building structure 10. That is, the L-shaped burn-off material 51 consists of a first opposing portion 51a that faces one surface (front end surface) forming the outer corner of the building structure 10, and a second opposing portion 51b that faces the other surface (left surface, right surface) forming the outer corner of the building structure 10.

[0029] Therefore, when fixing the L-shaped fire margin material 52 that covers one protruding corner (the left protruding corner) of the building structure 10 to the building structure 10, the first opposing portion 51a of the L-shaped fire margin material 52 is brought into contact with one surface (front end surface) that forms the one protruding corner, and the second opposing portion 51b of the L-shaped fire margin material 52 is fixed in a state of being in contact with the other surface (left surface) that forms the one protruding corner. Also, when fixing the L-shaped fire margin material 52 that covers the other protruding corner (the right protruding corner) of the building structure 10 to the building structure 10, the first opposing portion 51a of the L-shaped fire margin material 52 is brought into contact with one surface (front end surface) that forms the other protruding corner, and the second opposing portion 51b of the L-shaped fire margin material 52 is fixed in a state of being in contact with the other surface (right surface) that forms the other protruding corner.

[0030] In this way, the L-shaped fire margin material 52 can be positioned simply by abutting the first opposing portion 51a and the second opposing portion 52b of the L-shaped fire margin material 52 against the protruding corner of the building structure 10. Therefore, the L-shaped fire margin material 52 can be positioned by itself without using other members or marks, etc., so that the work of fixing the fire margin material 5 to the building structure 10 can be carried out easily. In FIGS. 1 to 5, the fire margin material 5 that is adjacent to the I-shaped fire margin material 52 and the L-shaped fire margin material 51 on the opposite side (rear side) may be an I-shaped fire margin material 52 or an L-shaped fire margin material 51 depending on the shape of the building structure 10.

[0031] As shown in FIG. 6, the inner length dimension L1 of the first opposing portion 51a of the L-shaped fire margin material 51 is set to be half or less (L1 ≦ L0 / 2) of the width dimension L0 of one surface (front end surface) that forms the protruding corner of the building structure 10, and it is preferable to set it to be less than half (L1 < L0 / 2) of the width dimension L0. That is, the length dimension L1 is preferably a dimension that can create a gap between the L-shaped fire margin material 51 that covers one protruding corner and the L-shaped fire margin material 51 that covers the other protruding corner in the building structure 10. The width dimension L0 is the design dimension, and by setting the length dimension L1 to less than half of the width dimension L0, a gap is formed between the L-shaped fire-resistant material 51 covering one corner of the building structure 10 and the L-shaped fire-resistant material 51 covering the other corner, and this gap allows the building structure 10 to absorb errors.

[0032] Specifically, for example, if dimensional errors or construction errors in the fire-resistant covering material 4 cause a discrepancy between the design and the width dimension of one surface (front end surface) forming the corner of the building structure 10, and the actual width dimension becomes longer than the width dimension L0, then the actual gap formed between the L-shaped burn-through material 51 covering one corner (the L-shaped burn-through material 51 with the first opposing part 51a and the second opposing part 52b in contact with the corner) and the L-shaped burn-through material 51 covering the other corner (the L-shaped burn-through material 51 with the first opposing part 51a and the second opposing part 52b in contact with the corner) will be wider than the gap designed.

[0033] Furthermore, if dimensional errors or construction errors in the fire-resistant covering material 4 cause a discrepancy between the width dimension of one surface (front end surface) forming the corner of the building structure 10 and the design, resulting in the actual width being shorter than the width dimension L0, the actual gap formed between the L-shaped burn-through material 51 covering one corner (the L-shaped burn-through material 51 with the first opposing part 51a and the second opposing part 52b in contact with the corner) and the L-shaped burn-through material 51 covering the other corner (the L-shaped burn-through material 51 with the first opposing part 51a and the second opposing part 52b in contact with the corner) will be narrower than the gap designed for this purpose.

[0034] Therefore, for example, when the length dimension L1 is set to half of the width dimension L0 (L1 = L0 / 2), if the actual width dimension becomes shorter than the width dimension L0, when the second opposing portion 52b of the L-shaped fire margin member 51 covering one of the protruding corner portions is brought into contact with the one protruding corner portion, the second opposing portion 52b of the L-shaped fire margin member 51 covering the other protruding corner portion cannot be brought into contact with the other protruding corner portion. That is, the L-shaped fire margin member 52 covering the other protruding corner portion cannot be fixed in a state (positioned state) where it is placed at a predetermined position. Thus, by setting the length dimension L1 to less than half of the width dimension L0 (L1 < L0 / 2), even when dimensional errors or construction errors occur in the fireproof covering material 4, both the L-shaped fire margin member 52 covering one of the protruding corner portions in the building structure 10 and the L-shaped fire margin member 52 covering the other protruding corner portion can be fixed in a state (positioned state) where they are placed at a predetermined position. Therefore, the work of fixing the fire margin member 5 to the building structure 10 can be easily performed.

[0035] Further, the inner length dimension L2 of the portion of the second opposing portion 51b of the L-shaped fire margin member 51 excluding the notch portion 50 is set to be longer than the difference L4 between the length dimension of the fixing member 6 driven in from the notch portion 50 in the first opposing portion 51a of the L-shaped fire margin member 51 and the thickness dimension L3 of the notch portion 50 in the first opposing portion 51a of the L-shaped fire margin member 51 (L2 > L4). Thereby, the fixing member 6 (hereinafter referred to as the "first fixing member") driven in from the notch portion 50 of the first opposing portion 51a in the L-shaped fire margin member 51 and the fixing member 6 (hereinafter referred to as the "second fixing member") driven in from the notch portion 50 of the second opposing portion 51b in the L-shaped fire margin member 51 do not contact each other. Therefore, when driving in the other fixing member after driving in one of the first fixing member and the second fixing member, the other fixing member can be driven in without considering the position or the like of the already driven-in one fixing member. Thus, the work of fixing the fire margin member 5 to the building structure 10 can be easily performed.

[0036] In this embodiment, in order to satisfy two conditions—(1) the fixing material 6 is driven into the core material, and (2) the length dimension L2 is longer than the difference L4—adjustment material 3 (such as a square timber) is installed at a position in contact with the front end surface of the building wall panel 2 (the side end surface on the corner side, i.e., the side end surface that is not in contact with a column or other building wall panel 2). Specifically, in this embodiment, the sum of the thickness dimension (length in the front-to-back direction) of the frame material A of the building wall panel 2 and the thickness dimension (length in the front-to-back direction) of the fire-resistant coating material 4 facing the front end surface of the building wall panel 2 is shorter than the length dimension L2. Therefore, if the adjustment material 3 is not installed, condition (1) cannot be satisfied. That is, if the adjustment material 3 is not installed and condition (2) is satisfied, the first fixing material can be driven into the core material (frame material A), but the second fixing material cannot be driven into the core material (frame material A). Therefore, in this embodiment, an adjustment material 3 that is thicker than the frame material A is installed as the core material into which the first fixing material is driven, such that the sum of the thickness dimension (length in the front-to-back direction) of the core material into which the first fixing material is driven and the thickness dimension (length in the front-to-back direction) of the fire-resistant coating material 4 facing the front end surface of the building wall panel 2 is greater than or equal to the length dimension L2. This makes it possible to satisfy condition (2) and condition (1) (i.e., the first and second fixing members are driven into the core material (adjustment material 3)).

[0037] The recessed portion 11 has its opening closed by a joint cover 7. The joint cover 7 is a lid member formed to a size that can fit (accommodate) the recessed portion 11, and is arranged along the groove-shaped recessed portion 11. The joint cover 7 is fixed to the decorative material 8 (wall covering, etc.) that covers the fire-resistant material 5, and is attached to the countersunk portion 11 while fixed to the decorative material 8. Therefore, the decorative material 8 can be positioned simply by attaching (fitting) the joint cover 7 to the countersunk portion 11, making it easy to cover the fire-resistant material 5 with the decorative material 8.

[0038] 《Wall Construction Method》 Next, we will explain an example of the construction method for wall 1. First, structural materials for the walls (architectural wall panels 2, columns, adjustment members 3, etc.) are erected on the upper surface of the lower structural part (not shown). Next, the structural materials for the walls are covered with fire-resistant coating material 4 to form the building structure 10.

[0039] Next, as shown in Figure 4, the outer corners of the building structure 10 are covered with L-shaped fire-resistant material 51. Specifically, two L-shaped burn-off materials 51 are prepared, and with the back surfaces (the surfaces facing the building structure 10) of the first opposing portion 51a and the second opposing portion 51b of one L-shaped burn-off material 51 in contact with one of the building structure 10's outer corners (the left outer corner), a fixing material 6 is driven in from the notch 50 of the one L-shaped burn-off material 51 toward the core material of the building structure 10. Similarly, with the back surfaces (the surfaces facing the building structure 10) of the first opposing portion 51a and the second opposing portion 51b of the other L-shaped burn-off material 51 in contact with the other outer corner of the building structure 10 (the right outer corner), a fixing material 6 is driven in from the notch 50 of the other L-shaped burn-off material 51 toward the core material of the building structure 10. This allows the L-shaped burn-off materials 51 to be fixed to the building structure 10 in a positioned location.

[0040] Next, the surfaces (left and right sides) of the building structure 10 are covered with I-shaped burn-through material 52. Specifically, the back surface (the side facing the building structure 10) of the I-shaped burn-through material 52 is brought into contact with the surface of the building structure 10, and the side end surface (notch 50) of the I-shaped burn-through material 52 is brought into contact with the side end surface (notch 50) of the second opposing portion 51b of the already fixed L-shaped burn-through material 51. With this in mind, the fixing material 6 is driven in from the notch 50 of the I-shaped burn-through material 51 toward the core material of the building structure 10. This allows the I-shaped burn-through material 51 to be fixed to the building structure 10 in a positioned location.

[0041] In other words, the I-shaped burn-off material 51 can be positioned by the L-shaped burn-off material 51 that has already been fixed. Therefore, when covering the surface of the building structure 10 (for example, the left side) with multiple I-shaped burn-off materials 51 arranged in the front-to-back direction, after fixing the L-shaped burn-off material 51 (for example, the L-shaped burn-off material 51 that covers the left corner of the building structure 10), the multiple I-shaped burn-off materials 51 can be fixed to the building structure 10 in a positioned state by sequentially fixing the I-shaped burn-off materials 51 that are adjacent to the L-shaped burn-off material 51 among the multiple I-shaped burn-off materials 51.

[0042] Finally, the surface of the burnable material 5 (the side opposite to the building structure 10) is covered with the decorative material 8. Specifically, for example, adhesive is applied to the surface of the burn-through material 5 and the inside of the counter-cut section 11, and the decorative material with a joint cover (decorative material 8 with the joint cover 7 fixed) is attached. At that time, it is attached in a position where the joint cover 7 fits into the counter-cut section 11. This allows the decorative material 8 (decorative material with joint cover) to be fixed to the surface of the burn-through material 5 in a fixed position. After that, the decorative material without a joint cover (decorative material 8 with the joint cover 7 not fixed) is attached with its end face in contact with the end face of the already fixed decorative material with a joint cover. This allows the decorative material 8 (decorative material without a joint cover) to be fixed to the surface of the burn-through material 5 in a fixed position. In this way, the burn-through material 5 is covered with the decorative material 8.

[0043] As shown in Figure 7, it is also possible to fix the joint cover 7 to the wide decorative material 8 and avoid using decorative material without a joint cover. The same applies to the modified examples described later.

[0044] 《First variation》 In the above embodiment, the first and second fixing materials for fixing the L-shaped burn-off material 51 were driven into the same core material (adjustment material 3), but the embodiment is not limited to this. In other words, if both conditions (1) and (2) above are met, the first and second fixing members for fixing the L-shaped burn-off material 51 may be driven towards different core materials, for example, as shown in Figures 8 to 10.

[0045] Specifically, in the first modified example, the wall 1 does not have an adjustment member 3, as shown in Figures 8 to 10. The first fixing member (i.e., the fixing member 6 driven in from the notch 50 in the first opposing portion 51a of the L-shaped burn-through material 51) is driven towards the frame member A of the building wall panel 2, and the second fixing member (i.e., the fixing member 6 driven in from the notch 50 in the second opposing portion 51b of the L-shaped burn-through material 51) is driven towards the auxiliary batten member B of the building wall panel 2.

[0046] 《Second variation》 For example, as shown in Figures 11 to 13, a spacer 9 may be provided between the building structure 10 and the burnable material 5 to create a gap between them. This makes it easier to keep the building structure 10 (the surface of the building structure 10 facing the burnable material 5) and the burnable material 5 (the surface of the burnable material 5 facing the building structure 10) dry. The spacer 9 may also be a laminate formed by stacking multiple plate-shaped members.

[0047] Furthermore, by using a non-combustible material as the spacer 9 and by placing the spacer 9 at a position that covers the boundary between mutually orthogonal fire-resistant coating materials 4, it is possible to obtain higher fire resistance performance. The boundary (boundary) between mutually orthogonal fire-resistant coating materials 4 is formed continuously from the outside to the inside (structural material) of the building structure 10, and can therefore become a heat transfer path connecting the outside and the inside in the event of a fire. Thus, by placing a non-combustible spacer 9 at a position that blocks the entrance to the heat transfer path, it is possible to suppress the transfer of heat to the inside (structural material).

[0048] In the examples shown in Figures 11 to 13, a spacer 9 is provided between the surface (left and right) of the building structure 10 and the flammable material 5. The spacer 9 is used to cover the boundary between the mutually orthogonal fire-resistant covering materials 4, so the fire-resistant covering material 4 is arranged such that the winning side covers the side end surface (front end surface) of the building wall panel 2, and the losing side covers the surface (left and right) of the building wall panel 2. In other words, the fire-resistant covering material 4 is arranged such that the side end surfaces (left and right) of the fire-resistant covering material 4 covering the side end surface (front end surface) of the building wall panel 2 are approximately flush with the surface surfaces (left and right) of the fire-resistant covering material 4 covering the surface (left and right) of the building wall panel 2.

[0049] In the second modified example, when fixing the L-shaped burn-off material 52 that covers one of the outer corners (the left outer corner) of the building structure 10 to the building structure 10, the first opposing portion 51a of the L-shaped burn-off material 52 is brought into contact with one surface (front end surface) that forms the outer corner, and the second opposing portion 51b of the L-shaped burn-off material 52 is brought into contact with the spacer 9 fixed to the other surface (left surface) that forms the outer corner. Furthermore, when fixing the L-shaped burn-off material 52 that covers the other outer corner (the right outer corner) of the building structure 10 to the building structure 10, the first opposing portion 51a of the L-shaped burn-off material 52 is brought into contact with one surface (front end surface) that forms the other outer corner, and the second opposing portion 51b of the L-shaped burn-off material 52 is brought into contact with the spacer 9 fixed to the other surface (right surface) that forms the other outer corner.

[0050] As shown in Figure 14, a spacer 9 may be provided between one of the surfaces (front end surface) forming the corner of the building structure 10 and the burn-through material 5. In the example shown in Figure 14, the arrangement of the fire-resistant covering material 4 is the same as that of the embodiment and the first modified example. That is, in the arrangement, the losing side is the fire-resistant covering material 4 that covers the side end surface (front end surface) of the building wall panel 2, and the winning side is the fire-resistant covering material 4 that covers the surface (left side, right side) of the building wall panel 2. The boundary between the mutually orthogonal fire-resistant covering materials 4 is covered by the spacer 9 provided between one of the surfaces (front end surface) forming the corner of the building structure 10 and the burn-through material 5.

[0051] "effect" The above embodiments and modifications provide the following excellent effects. Specifically, the building has a fire-resistant structure comprising a building structure 10 and a combustible material 5 that forms a combustible layer, wherein the combustible material 5 includes at least an L-shaped combustible material 51 in plan view that covers the outer corner of the building structure 10. In other words, the burn-off material 5 includes at least an L-shaped burn-off material 51 that can be positioned (set in a predetermined position) simply by bringing it into contact with the outer corner of the building structure 10. Therefore, the burn-off material 5 can be fixed in a predetermined position simply by fixing the L-shaped burn-off material 51 while it is in contact with the outer corner of the building structure 10 (either directly or via a spacer 9, etc.), thus improving the workability when fixing the wood that will form the burn-off layer (burn-off material 5). Furthermore, the building structure 10 does not necessarily have to have two protruding corners; it may have only one.

[0052] Furthermore, by providing a notch 50 at the end of the burnt material 5, it is possible to form a countersunk portion 11 using the notch 50 of one burnt material 5 and the notch 50 of the other burnt material 5 adjacent to the said burnt material 5. By configuring it in this way, the counter-cut portion 11 can be created simply by cutting a notch in the end of the burnt-out material 5, without performing counter-cutting or other processing, thus easily forming the counter-cut portion 11.

[0053] Furthermore, it is possible to provide fixing members 6 for securing the burnable material 5 to the building structure 10 from the notch 50 toward the core materials (frame material A, auxiliary crossbar material B, column material, beam material, adjustment material 3, etc.) that make up the building structure 10. By configuring it in this way, the burnable material 5 is fixed to the core material of the building structure 10, so that the burnable material 5 can be firmly fixed and that firm fixed state can be maintained.

[0054] Furthermore, the L-shaped burn-off material 51 is provided with a first opposing portion 51a facing one of the surfaces forming the corner and a second opposing portion 51b facing the other surface forming the corner, and the length L2 (length dimension L2) of the portion of the second opposing portion 51b excluding the notch 50 can be made longer than the difference L4 between the length (length dimension) of the fixing material 6 provided from the notch 50 of the first opposing portion 51a and the thickness L3 (thickness dimension L3) of the notch 50. With this configuration, the fixing member 6 (first fixing member) provided from the notch 50 of the first opposing part 51a and the fixing member 6 (second fixing member) provided from the notch 50 of the second opposing part 51b do not collide. Therefore, when installing the fixing members 6 (for example, when driving in the fixing members 6), it is not necessary to consider such collision, and the workability when fixing the wood that will become the burnable layer (burnable material 5) can be improved.

[0055] Furthermore, the joint cover 7 that fits into the recessed section 11 can be pre-fixed to the decorative material 8 that covers the burnt-out material 8. With this configuration, the decorative material 8 can be positioned simply by fitting the joint cover 7, which is pre-fixed to the decorative material 8, into the countersunk portion 11, thus facilitating the positioning of the decorative material 8 relative to the burnt-out material 5.

[0056] Furthermore, as shown in the second modified example, it is possible to provide a spacer 9 between the building structure 10 and the burnable material 5 to create a gap between them. This configuration makes it easier to keep the building structure 10 and the combustible material 5 dry. In the second modified example, a spacer 9 is provided for the fire-resistant structure of the first modified example (i.e., a fire-resistant structure in which the first and second fixing members for fixing the L-shaped burn-off material 51 are driven toward different core materials), but the invention is not limited to this. It is also possible to provide a spacer 9 for the fire-resistant structure of the embodiment (i.e., a fire-resistant structure in which the first and second fixing members for fixing the L-shaped burn-off material 51 are driven toward the same core material).

[0057] Furthermore, the building structure 10 can consist of wooden structural materials that constitute the building's frame (architectural panels (architectural wall panels 2, etc.), columns, beams, adjustment members 3, etc.) and a fire-resistant covering material 4 that covers the frame. By configuring it in this way, the wooden structural members are covered with the fire-resistant coating material 4, thus improving its fire resistance.

[0058] Furthermore, the spacer 9 can be made of a non-combustible material and positioned to close the boundary between the orthogonal fire-resistant coating materials 4. By configuring it in this way, the non-combustible spacer 9 is positioned to close the boundary between the mutually orthogonal fire-resistant coating materials 4, thereby improving fire resistance.

[0059] In the embodiments and modifications described above, building wall panels 2 and adjustment members 3 were used as structural structural materials, but the invention is not limited to these. That is, the structural structural materials may be building panels other than building wall panels 2 (such as building floor panels or building roof panels), columns (column members), or beams (beam members). When the structural structural material is a building panel, the core material is frame member A or auxiliary batten member B. When the structural structural material is a column (column member), the core material is the structural structural material itself (column member). When the structural structural material is a beam (beam member), the core material is the structural structural material itself (beam member). When the structural structural material is adjustment member 3, the core material is the structural structural material itself (adjustment member 3). Furthermore, although the above embodiments and modifications show a fire-resistant structure for wall 1, the invention is not limited thereto. That is, the fire-resistant structure of the present invention may be any of the following: a fire-resistant structure for wall 1, a fire-resistant structure for floor, a fire-resistant structure for ceiling, a fire-resistant structure for column, a fire-resistant structure for beam, etc.

[0060] Furthermore, in recent years, there has been a growing demand for the realization of a decarbonized society through the promotion of carbon neutrality, which aims to achieve virtually zero carbon dioxide emissions, and for the achievement of the Sustainable Development Goals (SDGs). In the construction industry, efforts are also being made to use wood, which reduces carbon dioxide emissions, for buildings. The fire-resistant structures in the above embodiments and modifications are fire-resistant structures for wooden buildings, and therefore can contribute to the realization of a decarbonized society through the promotion of carbon neutrality and the achievement of the SDGs. The above embodiments and modifications can be combined as appropriate. [Explanation of Symbols]

[0061] 2. Building wall panels (structural materials) 3 Adjustment material (frame structure material) 4 Fireproof coating 5. Burnable material 6 Fixing material 7. Joint cover 8 Decorative materials 10. Building Structure 11. Carved seat section 50 Notches 51 L-shaped burnable material 51a First facing part 52b Second opposing section L2 Length of the portion of the second opposing section excluding the notch L4 The difference between the length of the fixing material provided from the notch in the first opposing part and the thickness of the notch.

Claims

1. The building has a fire-resistant structure, Building structure and It comprises a combustible material that forms a combustible layer, The aforementioned burnable material includes at least an L-shaped burnable material in plan view that covers the outer corner of the building structure, The end of the aforementioned burnt material is provided with a notch. A fire-resistant structure characterized in that a counter-cut portion is formed by the notch of one of the burnable materials and the notch of the other burnable material adjacent to the one burnable material.

2. In the fire-resistant structure described in claim 1, A fire-resistant structure characterized in that a fixing member for fixing the burnable material to the building structure is provided extending from the notch toward the core material constituting the building structure.

3. In the fire-resistant structure described in claim 2, The aforementioned L-shaped burnable material is A first opposing portion facing one of the surfaces forming the aforementioned corner portion, It comprises a second opposing portion that faces the other surface forming the corner portion, The length of the portion of the second opposing portion excluding the notch is, A fire-resistant structure characterized in that the length of the fixing material provided from the notch in the first opposing portion is longer than the difference between the length of the fixing material and the thickness of the notch.

4. In the fire-resistant structure described in claim 1, The aforementioned recessed portion is fitted with a joint cover that fits into the recessed portion. The fire-resistant structure is characterized in that the joint cover is fixed in advance to the decorative material that covers the burn-through material.

5. In the fire-resistant structure described in claim 1, A fire-resistant structure characterized in that a spacer is provided between the building structure and the burnable material to form a gap between them.

6. In the fire-resistant structure described in claim 5, The aforementioned building structure comprises a wooden structural frame that constitutes the building's frame, and a fire-resistant covering material that covers the frame. The aforementioned spacer is It is a non-combustible material, A fire-resistant structure characterized by being positioned to close the boundary between the orthogonal fire-resistant coating materials.

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