JP7004977B2 - Building board - Google Patents

Description

The present invention relates to a building board attached to a protruding corner wall.

Patent Document 1 describes a plurality of building boards attached to protruding corners and having their ends connected to each other. The plurality of building boards have a flash structure in which the core material is sandwiched between the upper and lower face materials. In the plurality of building boards, the ends to be connected to each other are formed diagonally with respect to the depth direction of each building board, and the convex portion formed on one end is the other end. It is connected by being fitted into a concave portion formed in the portion.

Japanese Unexamined Patent Publication No. 2017-043916

By the way, the building board used for the cove lighting, the curtain box and the like is formed in a substantially L-shaped cross section. The building board material having a substantially L-shaped cross section is composed of a horizontal plate portion protruding from the wall surface and a front plate portion connected to an end portion of the horizontal plate portion on the opposite side of the wall surface. In the building board used for cove lighting, the front plate is connected to the horizontal board so as to extend upward from the horizontal board, and in the building board used for the curtain box, the front board is the horizontal board. It is connected to the horizontal plate portion so as to extend downward from.

Such a building board having a substantially L-shaped cross section requires advanced technology for cutting diagonally. Therefore, if the ends are formed diagonally as in the case of the plurality of building boards described in Patent Document 1, there is a problem that the manufacturing cost increases.

Further, in the plate material having a flash structure, rod-shaped core materials are arranged in a rectangular frame shape. Therefore, if the ends are formed diagonally as in the plurality of building boards described in Patent Document 1, the core material cannot be arranged at the ends, and the plurality of building boards cannot be arranged. There is a problem that the strength is lowered in the corner portion which is a connecting portion.

Further, in the plate material having a flash structure, one of the face materials can be easily formed into a substantially L-shaped cross section by widening and V-cutting and bending. However, if the ends are formed diagonally like a plurality of building boards described in Patent Document 1, it is necessary to make the face material to be V-cut and bent into a complicated shape, so that the manufacturing cost is high. There is a problem that it becomes expensive.

Therefore, it is an object of the present invention to provide a building board and a method for constructing a building board that can secure the strength of the corners while suppressing an increase in manufacturing cost in a building board having a substantially L-shaped cross section. ..

The building board material according to the present invention has a structure in which a pair of face materials are attached to the front and back surfaces of the core material, and has a horizontal plate portion attached to a protruding corner wall formed by the first wall surface and the second wall surface. It is a building board material provided with a front plate portion provided at an end opposite to the protruding corner wall of the horizontal plate portion, and extends in the first direction to form a part of the horizontal plate portion and the front plate portion. The first plate part to be attached to the first wall surface and the second plate part connected to the first plate part and extending in the second direction intersecting the first direction, forming a part of the horizontal plate part and the front plate part and being attached to the second wall surface. A second plate portion to be formed and a third plate portion extending in the first direction to form a part of the front plate portion are provided. The second plate portion has a concave portion into which the convex portion is inserted between the pair of face materials, and the third plate portion has the end face of the front plate portion of the first plate portion and the first plate portion. It comes into contact with the end face of the front plate portion of the two-plate portion.

In this building board material, the convex portion of the first plate portion is inserted into the concave portion of the second plate portion, and the first plate portion and the second plate portion are connected to extend in the first direction and the second direction. A substantially L-shaped horizontal plate portion can be formed. Further, in the state where the convex portion is inserted into the concave portion, the third plate portion is brought into contact with the end surface of the front plate portion of the first plate portion and the end surface of the front plate portion of the second plate portion in the first direction and. A substantially L-shaped front plate portion extending in the second direction can be formed. As a result, it is possible to assemble a building plate material having a substantially L-shape without diagonally cutting the horizontal plate portion and the front plate portion having a substantially L-shaped cross section, which suppresses an increase in manufacturing cost. be able to. Moreover, since the connection between the first plate portion and the second plate portion can be performed by inserting the convex portion of the first plate portion into the concave portion of the second plate portion, the substantially L-shaped building plate material The core material of the first plate portion or the core material of the second plate portion can be arranged at the corner portion. As a result, the strength of the corners of the building board can be ensured.

The protruding corner wall is provided with a rail for attaching a building board, and the horizontal board of the first board is inserted between the pair of facets at the end on the first wall side. The horizontal plate portion of the second plate portion has a recess for the second rail at the end portion on the second wall surface side, and the recess for the second rail into which the rail is inserted between the pair of face materials. May be good. In this building board material, by inserting the receiving rail into the first railing recess and the second railing recess of the first board and the second board, the first board and the second board can be easily attached to the first wall surface. And can be attached to the second wall surface.

The core material of the first plate portion extends to the first end portion on the side connected to the second plate portion of the first plate portion, and the core material of the second plate portion is the first plate of the second plate portion. It may extend to the second end on the side connected to the portion. In this building board, since the cores of the first board and the second board extend to the first end and the second end, the core is arranged at the corners of the building board. As a result, the strength of the corners of the building board can be ensured.

The core material of the first plate portion and the core material of the second plate portion may be in contact with each other. In this building board, since the core of the first board and the core of the second board are in contact with each other, the strength of the corners of the building board can be ensured.

The front plate portion may be formed of any one of a pair of face materials. In this building plate material, since the front plate portion is formed of any one of the pair of face materials, the number of parts can be reduced and the manufacturing cost can be reduced.

The pair of face materials of the first plate portion and the pair of face materials of the second plate portion may be in contact with each other. In this building board, since the pair of facets of the first board and the pair of facets of the second board are in contact with each other, the strength of the corners of the building board can be ensured.

A pair of fourth plate portions attached to the front and back surfaces of the convex portion of the first plate portion is further provided, and the pair of fourth plate portions is a pair of end faces of a pair of face materials of the first plate portion and a pair of second plate portions. It may be in contact with the end face of the face material. In this building board, the pair of fourth plates attached to the front and back surfaces of the convex portion of the first plate is the end face of the pair of face materials of the first plate and the side surface of the pair of face materials of the second plate. Is in contact with. Therefore, by cutting the pair of fourth plate portions, the end faces of the first plate portion of the pair of fourth plate portions on the side of the pair of face materials and the pair of surfaces of the second plate portion of the pair of fourth plate portions. By adjusting the angle between the end face on the material side and the end face, it is possible to change the angle between the first direction, which is the extending direction of the first plate, and the second direction, which is the extending direction of the second plate. can. As a result, even when the angle between the first wall surface and the second wall surface is not 90 °, the first plate portion and the second plate portion can be aligned with the first wall surface and the second wall surface.

According to the present invention, in a building board having a substantially L-shaped cross section, it is possible to secure the strength of the corner portion while suppressing an increase in manufacturing cost.

It is a perspective view which shows the state which the building board material of 1st Embodiment is attached to the protruding corner wall. It is a top view which shows the state which the building board material of 1st Embodiment is attached to the protruding corner wall. 3A is a cross-sectional view taken along the line IIIa-IIIa shown in FIG. 2, and FIG. 3B is a cross-sectional view taken along the line IIIb-IIIb shown in FIG. It is a top view which shows the building board material of 1st Embodiment. It is an exploded perspective view which shows the building board material of 1st Embodiment. 6 (a) is a front view showing the first plate portion, and FIG. 6 (b) is a cross-sectional view taken along the line VIb-VIb shown in FIG. 6 (a). 7 (a) is a cross-sectional view taken along the line VIIa-VIIa shown in FIG. 6 (a), and FIG. 7 (b) is a cross-sectional view taken along the line VIIb-VIIb shown in FIG. 6 (a). 8 (a) is a front view showing the second plate portion, and FIG. 8 (b) is a cross-sectional view taken along the line VIIIb-VIIIb shown in FIG. 8 (a). 9 (a) is a cross-sectional view taken along the line IXa-IXa shown in FIG. 8 (a), and FIG. 9 (b) is a cross-sectional view taken along the line IXb-IXb shown in FIG. 8 (a). 10 (a) is a plan view showing the third plate portion, and FIG. 10 (b) is a front view showing the third plate portion. 11 (a) is a cross-sectional view taken along the line XIa-XIa shown in FIG. 10 (b), and FIG. 11 (b) is a cross-sectional view taken along the line XIb-XIb shown in FIG. 10 (b). It is a perspective view for demonstrating the construction method of the building board material of 1st Embodiment. It is a perspective view for demonstrating the construction method of the building board material of 1st Embodiment. It is a perspective view for demonstrating the construction method of the building board material of 1st Embodiment. It is a perspective view which shows the state which the building board material of 2nd Embodiment is attached to the protruding corner wall. It is a top view which shows the building board material of 2nd Embodiment. It is an exploded perspective view which shows the building board material of 2nd Embodiment. 18 (a) is a front view showing the first plate portion, and FIG. 18 (b) is a cross-sectional view taken along the line XVIIIb-XVIIIb shown in FIG. 18 (a). 19 (a) is a front view showing the second plate portion, and FIG. 19 (b) is a cross-sectional view taken along the line XIXb-XIXb shown in FIG. 19 (a). 20 (a) is a cross-sectional view taken along the line XXa-XXa shown in FIG. 19 (a), and FIG. 20 (b) is a cross-sectional view taken along the line XXb-XXb shown in FIG. 19 (a). 21 (a) is a plan view showing the fourth plate portion, and FIG. 21 (b) is a front view showing the fourth plate portion. 22 (a) is a plan view showing the third plate portion, and FIG. 22 (b) is a front view showing the third plate portion. It is a perspective view for demonstrating the construction method of the building board material of 2nd Embodiment. It is a perspective view for demonstrating the construction method of the building board material of 2nd Embodiment. It is a perspective view for demonstrating the construction method of the building board material of 2nd Embodiment. It is a perspective view which shows the state which the building board material of the modification is attached to the protruding corner wall.

Hereinafter, the building board material of the embodiment will be described in detail with reference to the drawings. In this embodiment, the building board material of the present invention is applied to a building board material for cove lighting. However, the building board of the present invention is not limited to the building board of Cove lighting. In all the drawings, the same or corresponding parts are designated by the same reference numerals, and duplicate description will be omitted.

[First Embodiment]
As shown in FIGS. 1 to 3, the building board 1 of the present embodiment is a building board used for cove lighting. Cove lighting is indirect lighting that illuminates the ceiling surface. The building board 1 is attached to the projected corner wall 101. The protruding corner wall 101 is a protruding corner wall formed by the first wall surface 101a and the second wall surface 101b. The first wall surface 101a and the second wall surface 101b are adjacent wall surfaces. The angle formed by the first wall surface 101a and the second wall surface 101b is not particularly limited, but will be described as 90 ° in the present embodiment. In the following description, the vertical and vertical directions refer to the directions in which the building board 1 is attached to the protruding corner wall 101.

As shown in FIGS. 1 to 5, the building board 1 extends in the first direction D1 and is formed in a substantially L shape extending in the second direction D2 intersecting the first direction D1. In the present embodiment, the angle formed by the first direction D1 and the second direction D2 is 90 °, and the first direction D1 and the second direction D2 are orthogonal to each other. The building board 1 includes a horizontal plate portion 2 attached to the projected corner wall 101, and a front plate portion 3 provided at an end portion of the horizontal plate portion 2 opposite to the projected corner wall 101. Therefore, the building plate 1 is formed by the horizontal plate portion 2 and the front plate portion 3 in a substantially L-shaped cross section. A lighting fixture 102 as a cove lighting is installed on the upper surface of the horizontal plate portion 2. The attachment of the horizontal plate portion 2 to the protruding corner wall 101 is not particularly limited, but in the present embodiment, the receiving rail 103 is provided on the protruding corner wall 101, and the horizontal plate portion 2 is inserted and adhered to the receiving rail 103. It will be explained as if it is done by. The attachment of the receiving rail 103 to the protruding corner wall 101 is not particularly limited, but can be performed by, for example, screwing. The pier 103 provided on the first wall surface 101a is referred to as a first pier 103a, and the pier 103 provided on the second wall surface 101b is referred to as a second pier 103b.

The horizontal plate portion 2 has a structure in which a pair of face materials 5 and 6 are attached to the front and back surfaces of the core material 4. As such a structure, for example, a flash structure in which a pair of face materials are attached to the front and back surfaces of a core material made by combining a plurality of prism members, and a pair of face materials on the front and back surfaces of a core material made of a plate-shaped member. The pasted structure and the like can be mentioned. The flash structure generally refers to a structure having a gap between a plurality of prism members constituting the core material, but a structure having no gap between a plurality of prism members constituting the core material may be used. good. From the viewpoint of ensuring strength and reducing weight, it is preferable to have a gap between a plurality of prism members constituting the core material. Therefore, in the present embodiment, the horizontal plate portion 2 has a flash structure in which a pair of face materials 5 and 6 are attached to the front and back surfaces of a core material 4 formed by combining a plurality of prism members, and the core material 4 is formed. It will be described as a structure having a gap portion between a plurality of constituent prism members. The core material 4 is formed by arranging a plurality of prism members in a grid pattern in order to secure the strength while reducing the weight of the horizontal plate portion 2. As each member constituting the core material 4, for example, wood or the like is used. The face material 5 is a decorative board attached to the lower surface of the core material 4. The face material 6 is a decorative board attached to the upper surface of the core material 4. As the pair of face materials 51 and 61, for example, a thin plate or the like on which a sheet such as a wooden sheet, a paper-based sheet, or a resin sheet is attached to the surface is used.

The building plate material 1 extends in the first direction D1 and is connected to the first plate portion 11 and the first plate portion 11 which forms a part of the horizontal plate portion 2 and the front plate portion 3 and is attached to the first wall surface 101a. A second plate portion 12 that extends in the second direction D2 and is attached to the second wall surface 101b forming a part of the horizontal plate portion 2 and the front plate portion 3, and extends in the first direction D1 and is one of the front plate portions 3. A third plate portion 13 forming a portion is provided. The first plate portion 11 and the second plate portion 12 are formed in a substantially L shape by connecting the ends thereof. Here, of both ends of the first plate portion 11 in the first direction D1, the end portion on the side connected to the second plate portion 12 is referred to as the first end portion 11A (see FIG. 6A). Further, of both ends of the second plate portion 12 in the second direction D2, the end portion on the side connected to the first plate portion 11 is referred to as a second end portion 12A (see FIG. 8A).

The first plate portion 11 forms a first horizontal plate portion 21 which is a part of the horizontal plate portion 2 and a first front plate portion 31 which is a part of the front plate portion 3. The second plate portion 12 forms a second horizontal plate portion 22 which is a part of the horizontal plate portion 2 and a second front plate portion 32 which is a part of the front plate portion 3. The third plate portion 13 forms a third front plate portion 33 which is a part of the front plate portion 3. The horizontal plate portion 2 is composed of a first horizontal plate portion 21 and a second horizontal plate portion 22, and the front plate portion 3 includes a first front plate portion 31, a second front plate portion 32, and a third. It is composed of a front plate portion 33. The core material 4 and the pair of face materials 5 and 6 of the first horizontal plate portion 21 are referred to as a core material 41 and a pair of face materials 51 and 61, respectively. The core material 4 and the pair of face materials 5 and 6 of the second horizontal plate portion 22 are referred to as a core material 42 and a pair of face materials 52 and 62, respectively.

<First plate part>
As shown in FIGS. 4 to 7, the first plate portion 11 includes a first horizontal plate portion 21 having a flash structure in which a pair of face materials 51 and 61 are attached to the front and back surfaces of the core material 41, and a first front plate. It has a part 31 and.

The core material 41 is formed by joining a plurality of prism members extending in the first direction D1 and a plurality of prism members extending in the second direction D2 (direction orthogonal to the first direction D1) in a grid pattern.

The pair of face members 51 and 61 are formed in a long rectangular shape in the first direction D1. The pair of face materials 51 and 61 are attached to the upper and lower surfaces of the core material 41. Then, the pair of face materials 51 and 61 project from the core material 41 toward the first wall surface 101a (left side in FIG. 7A), so that the first crosspiece 103a ( A first rail receiving recess 21A into which (see FIG. 3A) is inserted is formed. That is, the first horizontal plate portion 21 has a first pier recess 21A in which the first pier 103a is inserted between the pair of face members 51 and 61 at the end portion on the first wall surface 101a side. The first rail receiving recess 21A is a recess opened on the first wall surface 101a side.

The first front plate portion 31 is provided at the end of the first horizontal plate portion 21 on the opposite side (right side in FIG. 7A) from the first wall surface 101a so as to extend upward from the first horizontal plate portion 21. Has been done. The first front plate portion 31 is formed of a face material 51. More specifically, the first front plate portion 31 widens the face material 51 of the first horizontal plate portion 21 in the second direction D2 (the direction orthogonal to the first direction D1), and V-cuts and bends the face material 51. Is formed by. The V-cut is performed by cutting the surface of the face material 51 on the core material 41 side in a V shape while leaving the surface of the face material 51 on the side opposite to the core material 41. The tip of the bent face material 51 is inserted into the groove 41A formed on the upper surface of the core material 41 and joined to the core material 41. The groove 41A is a groove extending in the first direction D1 and is formed in the entire area of the core material 41 in the first direction D1. In the first front plate portion 31, the bent face material 51 may be overlapped, or may not be overlapped and a space may be formed inside. In the latter case, another member may be inserted into the internal space of the face material 51 to increase the strength of the first front plate portion 31. The face material 61 is preferably in contact with the face material 51 forming the first front plate portion 31, but may not be in contact with the face material 51.

The first front plate portion 31 may not be formed by the face material 51, but may be formed by a member different from the first horizontal plate portion 21. In this case, the structure of the first front plate portion 31 is not particularly limited, and may be, for example, a flash structure similar to that of the first horizontal plate portion 21, and is a single plate composed of one plate. It may be a structure.

The first plate portion 11 has a convex portion 21B in which the core material 41 protrudes from the pair of face materials 51 and 61 and the first front plate portion 31. The convex portion 21B is a part of the core material 41. More specifically, the end faces 51A and 61A on the first end 11A side of the pair of face members 51 and 61 are planes orthogonal to the first direction D1 (planes parallel to the second direction D2) and are the first front plates. The end surface 31A on the first end portion 11A side of the portion 31 is a surface orthogonal to the first direction D1 (a surface parallel to the second direction D2). The end faces 51A and 61A of the pair of face members 51 and 61 and the end faces 31A of the first front plate portion 31 are flush with each other. The core material 41 projects from the end faces 51A and 61A of the pair of face members 51 and 61 and the end faces 31A of the first front plate portion 31 toward the first end portion 11A. The portion of the core material 41 protruding from the pair of face materials 51, 61 and the first front plate portion 31 becomes the convex portion 21B. The end surface of the convex portion 21B (core material 41) on the first end portion 11A side is preferably a surface orthogonal to the first direction D1, but is not necessarily a surface orthogonal to the first direction D1. ..

The core material 41 of the first plate portion 11 extends to the first end portion 11A. More specifically, among the plurality of prism members constituting the core material 41, the prism member 41B located at the end opposite to the first wall surface 101a and extending in the first direction D1 extends to the first end portion 11A. It is extended.

<Second plate part>
As shown in FIGS. 4, 5, 8 and 9, the second plate portion 12 is a member connected to the first plate portion 11. The second plate portion 12 has a second horizontal plate portion 22 having a flash structure in which a pair of face materials 52 and 62 are attached to the front and back surfaces of the core material 42, and a second front plate portion 32.

The core material 42 is formed by joining a plurality of prism members extending in the second direction D2 and a plurality of prism members extending in the first direction D1 (direction orthogonal to the second direction D2) in a grid pattern.

The pair of face members 52 and 62 are formed in a long rectangular shape in the second direction D2. The pair of face materials 52 and 62 are attached to the upper and lower surfaces of the core material 42. Then, the pair of face materials 52 and 62 project from the core material 42 toward the second wall surface 101b (right side in FIG. 9A), so that the second crosspiece 103b (between the pair of face materials 52 and 62) A second rail receiving recess 22A into which (see FIG. 3B) is inserted is formed. That is, the second horizontal plate portion 22 has a second pier recess 22A at which the second pier 103b is inserted between the pair of face members 52 and 62 at the end portion on the second wall surface 101b side. The second rail receiving recess 22A is a recess opened on the second wall surface 101b side.

The second front plate portion 32 is provided at the end of the second horizontal plate portion 22 on the opposite side (left side in FIG. 9A) so as to extend upward from the second horizontal plate portion 22. Has been done. The second front plate portion 32 is formed of a face material 52. More specifically, the second front plate portion 32 widens the face material 52 of the second horizontal plate portion 22 in the first direction D1 (direction orthogonal to the second direction D2), and is V-cut and bent. Is formed by. The V-cut is performed by cutting the surface of the face material 52 on the core material 42 side in a V shape while leaving the surface of the face material 52 on the side opposite to the core material 42. The tip of the bent face material 52 is inserted into the groove 42A formed on the upper surface of the core material 42 and joined to the core material 42. The groove 42A is a groove extending in the second direction D2, and is formed in the entire area of the core material 42 in the second direction D2. In the second front plate portion 32, the bent face materials 52 may be overlapped with each other, or may not be overlapped with each other and a space may be formed inside. In the latter case, another member may be inserted into the internal space of the face material 52 to increase the strength of the second front plate portion 32. The face material 62 is preferably in contact with the face material 52 forming the second front plate portion 32, but may not be in contact with the face material 52.

The second front plate portion 32 may not be formed by the face material 52, but may be formed by a member different from the second horizontal plate portion 22. In this case, the structure of the second front plate portion 32 is not particularly limited, and may be, for example, a flash structure similar to that of the second horizontal plate portion 22, and is a single plate composed of one plate. It may be a structure.

The second plate portion 12 has a recess 22B into which the convex portion 21B of the first plate portion 11 is inserted between the pair of face members 52 and 62. The recess 22B is a recess opened on the first plate portion 11 side (second wall surface 101b side) in the portion of the second horizontal plate portion 22 on the second end portion 12A side. Therefore, the convex portion 21B can be inserted into the concave portion 22B from the second wall surface 101b side. The recess 22B is formed by not arranging the core material 42 between the pair of face materials 52 and 62. More specifically, the side surfaces 52B and 62B on the second end 12A side of the pair of face materials 52 and 62 are planes orthogonal to the second direction D2 (planes parallel to the first direction D1). In the portion of the second plate portion 12 on the second end portion 12A side, the core material 42 is located on the side opposite to the first plate portion 11 (second wall surface 101b) from the side surfaces 52B, 62B of the pair of face materials 52, 62. I'm withdrawn. The space between the pair of face materials 52 and 62 formed by retracting the core material 42 from the side surfaces 52B and 62B of the pair of face materials 52 and 62 becomes the recess 22B.

The core material 42 of the second plate portion 12 extends to the second end portion 12A. More specifically, among the plurality of prism members constituting the core material 42, the prism member 42B located at the end opposite to the second wall surface 101b and extending in the second direction D2 extends to the second end 12A. It is extended.

Then, when the convex portion 21B is inserted into the concave portion 22B, the end faces 51A and 61A of the pair of face materials 51 and 61 in the first plate portion 11 become the side surfaces 52B of the pair of face materials 52 and 62 in the second plate portion 12. The concave portion 22B is formed to have substantially the same shape as the convex portion 21B or a shape larger than the convex portion 21B so as to abut on the convex portion 21B. When the convex portion 21B is inserted into the concave portion 22B, the prism member 41B (core material 41) of the first plate portion 11 and the prism member 42B (core material 42) of the second plate portion 12 are in contact with each other. Although they may be separated from each other, they are preferably in contact with each other from the viewpoint of ensuring strength. That is, it is preferable that the convex portion 21B and the concave portion 22B have substantially the same shape so that the prism member 41B and the prism member 42B come into contact with each other when the convex portion 21B is inserted into the concave portion 22B.

<Third plate part>
As shown in FIGS. 4, 5, 10 and 11, in the third plate portion 13, the convex portion 21B is inserted into the concave portion 22B (the first plate portion 11 and the second plate portion 12 are connected to each other). In this state), the end surface 31A of the first front plate portion 31 of the first plate portion 11 and the end surface 32A of the second front plate portion 32 of the second plate portion 12 are brought into contact with each other. The third plate portion 13 has a third front plate portion 33.

The third front plate portion 33 has substantially the same shape as the first front plate portion 31 and the second front plate portion 32. More specifically, the third front plate portion 33 is formed of the same face material as the face material 51 of the first front plate portion 31 and the face material 52 of the second front plate portion 32. The third front plate portion 33 has substantially the same cross-sectional shape as the first front plate portion 31 and the second front plate portion 32 by V-cutting and bending the face material. However, from the viewpoint of shape retention and strength assurance, the third front plate portion 33 has a portion corresponding to the tip portion inserted into the groove 41A and the groove 42A in the first front plate portion 31 and the second front plate portion 32. By further V-cutting and bending without inserting into the groove, a P-shaped closed cross section is obtained.

Therefore, the lower portion of the third front plate portion 33 is a thin-walled portion 33A composed of a single face material, and the upper portion of the third front plate portion 33 has a closed cross section formed by the bent face material. It is a thickened portion 33B. The thin-walled portion 33A is a pair of an end surface 31A of the first front plate portion 31 of the first plate portion 11, a side surface of the convex portion 21B of the first plate portion 11, and a second horizontal plate portion 22 of the second plate portion 12. It is a portion that comes into contact with the side surfaces 52B and 62B of the face materials 52 and 62. The thick portion 33B includes the end surface 31A of the first front plate portion 31 of the first plate portion 11, the side surface of the second front plate portion 32 of the second plate portion 12, and the second horizontal plate portion of the second plate portion 12. It is a portion that comes into contact with the upper surface of the face material 62 of 22. The end of the thick portion 33B on the second plate portion 12 side is a thin end made of a single face material like the thin portion 33A so as to avoid the second front plate portion 32 of the second plate portion 12. It is part 33C. The thin-walled end portion 33C is a portion that comes into contact with the end surface 32A of the second front plate portion 32 of the second plate portion 12.

<Building board>
The building board 1 of the first embodiment is configured by assembling the first board portion 11, the second board portion 12, and the third board portion 13 described above. More specifically, in the building board 1, the convex portion 21B of the first plate portion 11 is inserted into the concave portion 22B of the second plate portion 12, and the end faces 51A of the pair of face materials 51, 61 of the first plate portion 11 are inserted. 61A is in contact with the side surfaces 52B, 62B of the pair of face materials 52, 62 of the second plate portion 12. Further, in the building board 1, the thin portion 33A and the thick portion 33B of the third plate portion 13 are in contact with the end surface 31A of the first front plate portion 31 of the first plate portion 11. Further, the thin portion 33A of the third plate portion 13 has the side surface of the convex portion 21B of the first plate portion 11, the end faces 52A, 62A of the pair of face materials 52, 62 of the second plate portion 12, and the second plate portion. It is in contact with the end surface of the core material 42 (prism member 42B) of the twelve. Further, the thick portion 33B of the third plate portion 13 is in contact with the upper surface of the second horizontal plate portion 22 of the second plate portion 12 and the side surface of the second front plate portion 32 of the second plate portion 12. ing. Further, the thin-walled end portion 33C of the third plate portion 13 is in contact with the end surface 32A of the second front plate portion 32 of the second plate portion 12.

<Construction method of building board>
Next, the construction method of the building board 1 of the first embodiment will be described.

First, as shown in FIG. 12, the receiving rail 103 is attached to the protruding corner wall 101. More specifically, the first pier 103a is attached to the first wall surface 101a, and the second pier 103b is attached to the second wall surface 101b. At this time, the first pier 103a and the second pier 103b are arranged on the same horizontal line and attached to the first wall surface 101a and the second wall surface 101b by screwing or the like.

Next, as shown in FIG. 13, the first plate portion 11 and the second plate portion 12 are connected, and the first plate portion 11 and the second plate portion 12 are attached to the first receiving rail 103a and the second receiving rail 103b. .. More specifically, the convex portion 21B of the first plate portion 11 is inserted into the concave portion 22B of the second plate portion 12, and the end faces 51A and 61A of the pair of face materials 51 and 61 of the first plate portion 11 are inserted into the second plate portion. It abuts on the side surfaces 52B, 62B of the pair of face materials 52, 62 of 12. Then, the first plate portion 11 and the second plate portion 12 are joined with an adhesive or the like. Further, the first pier 103a is inserted into the first pier recess 21A of the first plate portion 11, and the second pier 103b is inserted into the second pier recess 22A of the second plate portion 12. Then, the first plate portion 11 and the second plate portion 12 are joined to the first pier 103a and the second pier 103b with an adhesive or the like.

Next, as shown in FIG. 14, the third plate portion 13 is attached to the first plate portion 11 and the second plate portion 12. More specifically, the third plate portion 13 is arranged between the first front plate portion 31 of the first plate portion 11 and the second front plate portion 32 of the second plate portion 12. Then, the thin portion 33A and the thick portion 33B of the third plate portion 13 are brought into contact with the end surface 31A of the first front plate portion 31 of the first plate portion 11, and the thin portion 33A of the third plate portion 13 is first. It hits the side surface of the convex portion 21B of the plate portion 11, the end faces 52A, 62A of the pair of face members 52, 62 of the second plate portion 12, and the end faces of the core material 42 (prism member 42B) of the second plate portion 12. The thick portion 33B of the third plate portion 13 is brought into contact with the upper surface of the second horizontal plate portion 22 of the second plate portion 12 and the side surface of the second front plate portion 32 of the second plate portion 12. The thin end portion 33C of the third plate portion 13 comes into contact with the end surface 32A of the second front plate portion 32 of the second plate portion 12. Then, the third plate portion 13 is joined to the first plate portion 11 and the second plate portion 12 with an adhesive or the like. As a result, the building board 1 is attached to the protruding corner wall 10.

The first pier 103a and the second pier 103b may be inserted into the first pier recess 21A and the second pier recess 22A during the assembly of the building board 1 as described above. It may be after all the building boards 1 have been assembled.

As described above, in the building plate material 1 according to the present embodiment, the convex portion 21B of the first plate portion 11 is inserted into the concave portion 22B of the second plate portion 12, and the first plate portion 11 and the second plate portion 12 are formed. By connecting the above, a substantially L-shaped horizontal plate portion 2 extending in the first direction D1 and the second direction D2 can be formed. Further, with the convex portion 21B inserted into the concave portion 22B, the third plate portion 13 is formed by the end surface 31A of the first front plate portion 31 of the first plate portion 11 and the second front plate portion 32 of the second plate portion 12. By abutting on the end surface 32A, a substantially L-shaped front plate portion 3 extending in the first direction D1 and the second direction D2 can be formed. As a result, the building plate 1 having a substantially L-shape can be assembled without diagonally cutting the horizontal plate portion 2 and the front plate portion 3 having a substantially L-shaped cross section, which increases the manufacturing cost. Can be suppressed. Moreover, since the connection between the first plate portion 11 and the second plate portion 12 can be performed by inserting the convex portion 21B of the first plate portion 11 into the concave portion 22B of the second plate portion 12, the shape is substantially L. The core material 41 of the first plate portion 11 or the core material 42 of the second plate portion 12 can be arranged at the corners of the building plate 1 having a shape. As a result, the strength of the corners of the building board 1 can be ensured.

Further, by inserting the first pier 103a and the second pier 103b into the first pier recess 21A and the second pier recess 22A of the first plate portion 11 and the second plate portion 12, the first plate portion 11 can be easily inserted. And the second plate portion 12 can be attached to the first wall surface 101a and the second wall surface 101b.

Further, since the core material 41 and the core material 42 of the first plate portion 11 and the second plate portion 12 extend to the first end portion 11A and the second end portion 12A, the core material is formed at the corner portion of the building plate portion 1. 41 and the core material 42 are arranged. As a result, the strength of the corners of the building board 1 can be ensured.

Further, since the core material 41 of the first plate portion 11 and the core material 42 of the second plate portion 12 are in contact with each other, the strength of the corner portion of the building plate portion 1 can be ensured.

Further, since the first front plate portion 31 and the second front plate portion 32 are formed of the face material 51 and the face material 52, the number of parts can be reduced and the manufacturing cost can be reduced.

Further, since the pair of face materials 51 and 61 of the first plate portion 11 and the pair of face materials 52 and 62 of the second plate portion 12 are in contact with each other, the strength of the corner portion of the building plate portion 1 is ensured. be able to.

[Second Embodiment]
Next, the building board material according to the second embodiment will be described. The building board material according to the second embodiment is basically the same as the building board material according to the first embodiment, but the building board material according to the first embodiment is further provided with a pair of fourth board portions. It is different from the plate material. Therefore, in the following, only the matters different from the building board material according to the first embodiment will be described, and the same matters as the building board material according to the first embodiment will be omitted.

As shown in FIGS. 15 to 17, the building board 1A according to the present embodiment includes a pair of fourth board portions 14, 15 in addition to the first plate portion 11, the second plate portion 12, and the third plate portion 13. To prepare for.

<First plate part>
As shown in FIGS. 15 to 18, the length of the first plate portion 11 of the second embodiment is shorter in the first direction D1 than that of the first plate portion 11 of the first embodiment. The protruding length of the convex portion 21B (core material 41) with respect to the pair of face materials 51 and 61 and the first front plate portion 31 is shorter than that of the first embodiment.

<Second plate part>
As shown in FIGS. 15 to 17, 19 and 20, the second plate portion 12 of the second embodiment is compared with the second plate portion 12 of the first embodiment in the first direction D1 (second direction). The depth of the recess 22B in the direction orthogonal to D2) is shallow. More specifically, the entire core material 42 extends to the second end portion 12A, and in the first direction D1, the concave portion 22B into which the convex portion 21B is inserted and the concave portion 22A for the second receiving rail into which the second receiving rail 103b is inserted. And have the same depth.

<Fourth board>
As shown in FIGS. 15 to 17 and 21, the pair of fourth plate portions 14 and 15 are attached to the front and back surfaces of the convex portion 21B of the first plate portion 11 to form a part of the horizontal plate portion 2. It is an eggplant member. Therefore, in the second embodiment, the horizontal plate portion 2 is composed of a first horizontal plate portion 21, a second horizontal plate portion 22, and a pair of fourth plate portions 14, 15. The pair of fourth plate portions 14 and 15 is a pair of first plate portions 11 in a state where the convex portion 21B is inserted into the concave portion 22B (a state in which the first plate portion 11 and the second plate portion 12 are connected). The end faces 51A and 61A of the face materials 51 and 61 and the side surfaces 52B and 62B of the pair of face materials 52 and 62 of the second plate portion 12 are in contact with each other.

The pair of fourth plate portions 14 and 15 are formed in a rectangular plate shape by the same face materials as the pair of face materials 51 and 61, respectively. The fourth plate portion 14 is attached to the lower surface of the convex portion 21B and is arranged between the face material 51 of the first plate portion 11 and the face material 52 of the second plate portion 12. Similarly, the fourth plate portion 15 is attached to the upper surface of the convex portion 21B so as to be arranged between the face material 61 of the first plate portion 11 and the face material 62 of the second plate portion 12. Then, the end faces 14A, 15A on the first plate portion 11 side in the first direction D1 of the fourth plate portions 14, 15 are in contact with the end faces 51A, 61A of the pair of face materials 51, 61 of the first plate portion 11. , The end faces 14B and 15B on the second plate portion 12 side in the first direction D1 of the fourth plate portions 14 and 15 are the side surfaces 52B on the first plate portion 11 side of the pair of face materials 52 and 62 of the second plate portion 12. , 62B is abutted.

By the way, the pair of fourth plate portions 14, 15 are arranged between the pair of face materials 51, 61 of the first plate portion 11 and the pair of face materials 52, 62 of the second plate portion 12. Therefore, by adjusting the angle formed by the end faces 14A and 15A and the end faces 14B and 15B, the first direction D1 which is the extending direction of the first plate portion 11 and the extending direction of the second plate portion 12 are the first. The angle formed by the two directions D2 can be adjusted. More specifically, in the pair of fourth plate portions 14 and 15, the end faces 14A and 15A and the end faces 14B and 15B are parallel to each other. Therefore, when the pair of fourth plate portions 14 and 15 come into contact with the pair of face materials 51 and 61 of the first plate portion 11 and the pair of face materials 52 and 62 of the second plate portion 12 in the same state. The first plate portion 11 and the second plate portion 12 form an L-shape bent at 90 °. On the other hand, the pair of face materials 51 and 61 are cut to incline the end faces 14A and 15A and the end faces 14B and 15B, and in this state, the pair of face materials 51 and 61 and the second plate portion 12 of the first plate portion 11 When it comes into contact with the pair of face materials 52 and 62, the first plate portion 11 and the second plate portion 12 form a substantially L-shape bent at an angle larger than 90 ° or an angle smaller than 90 °. For example, by cutting the pair of fourth plate portions 14, 15 along the C1 line shown in FIG. 21, the pair of fourth plate portions 14, 15 is formed into a trapezoidal shape that expands toward the first wall surface 101a. The first plate portion 11 and the second plate portion 12 form a substantially L-shape that bends at an angle larger than 90 °. On the other hand, by cutting the pair of fourth plate portions 14, 15 along the C2 line shown in FIG. 21, the pair of fourth plate portions 14, 15 is formed into a trapezoidal shape that narrows toward the first wall surface 101a side. The first plate portion 11 and the second plate portion 12 form a substantially L-shape that bends at an angle smaller than 90 °.

<Third plate part>
As shown in FIGS. 15 to 17 and 22, the third plate portion 13 of the second embodiment has a longer length in the first direction D1 than the third plate portion 13 of the first embodiment. .. More specifically, the third plate portion 13 is a pair of fourth plate portions 14, 61 between the pair of face materials 51, 61 of the first plate portion 11 and the pair of face materials 52, 62 of the second plate portion 12. With the 15 arranged, the length is from the first front plate portion 31 of the first plate portion 11 to the second front plate portion 32 of the second plate portion 12.

When the pair of face members 51 and 61 are cut and the end faces 14A and 15A and the end faces 14B and 15B are tilted, the third plate portion 13 is V-cut and bent to form the third plate portion 13. Can be brought into contact with the first plate portion 11, the second plate portion 12, and the pair of fourth plate portions 14, 15.

<Building board>
The building plate material 1A of the second embodiment is configured by assembling the first plate portion 11, the second plate portion 12, the third plate portion 13, and the pair of fourth plate portions 14, 15 described above. More specifically, in the building plate 1A, the convex portion 21B of the first plate portion 11 is the second plate portion 12 with the pair of fourth plate portions 14 and 15 attached to the lower surface and the upper surface of the convex portion 21B. It is inserted in the recess 22B. Then, the end faces 14A and 15A of the fourth plate portions 14 and 15 are in contact with the end faces 51A and 61A of the pair of face materials 51 and 61 of the first plate portion 11, and the end faces of the fourth plate portions 14 and 15 are in contact with each other. 14B and 15B are in contact with the side surfaces 52B and 62B of the pair of face materials 52 and 62 of the second plate portion 12. Further, in the building board 1A, the thin portion 33A and the thick portion 33B of the third plate portion 13 are in contact with the end surface 31A of the first front plate portion 31 of the first plate portion 11. Further, the thin-walled portion 33A of the third plate portion 13 has a side surface of the convex portion 21B of the first plate portion 11, a pair of side surfaces of the fourth plate portions 14 and 15, and a pair of face materials 52 of the second plate portion 12. , 62 end faces 52A, 62A and the end face of the core material 42 of the second plate portion 12 are in contact with each other. Further, the thick portion 33B of the third plate portion 13 includes the upper surface of the fourth plate portion 14, the upper surface of the second horizontal plate portion 22 of the second plate portion 12, and the second front plate portion of the second plate portion 12. It is in contact with the side surface of 32. Further, the thin-walled end portion 33C of the third plate portion 13 is in contact with the end surface 32A of the second front plate portion 32 of the second plate portion 12.

<Construction method of building board>
Next, the construction method of the building board 1A of the second embodiment will be described.

First, as shown in FIG. 23, the receiving rail 103 is attached to the protruding corner wall 101. More specifically, the first pier 103a is attached to the first wall surface 101a, and the second pier 103b is attached to the second wall surface 101b. At this time, the first pier 103a and the second pier 103b are arranged on the same horizontal line and attached to the first wall surface 101a and the second wall surface 101b by screwing or the like.

Next, as shown in FIG. 24, a pair of fourth plate portions 14 and 15 are attached to the lower surface and the upper surface of the convex portion 21B to connect the first plate portion 11 and the second plate portion 12 and to connect the first plate portion 12. The portion 11 and the second plate portion 12 are attached to the first pier 103a and the second pier 103b. More specifically, the lower surface and the upper surface of the convex portion 21B so that the end faces 14A and 15A of the pair of fourth plate portions 14 and 15 abut on the end faces 51A and 61A of the pair of face materials 51 and 61 of the first plate portion 11. A pair of fourth plate portions 14, 15 are attached to. Then, the pair of fourth plate portions 14 and 15 are joined to the lower surface and the upper surface of the convex portion 21B with an adhesive or the like. Next, the convex portion 21B of the first plate portion 11 is inserted into the concave portion 22B of the second plate portion 12, and the end faces 14B and 15B of the pair of fourth plate portions 14 and 15 are paired with the pair of surfaces of the second plate portion 12. It abuts on the side surfaces 52B and 62B of the materials 52 and 62. Then, the first plate portion 11 and the second plate portion 12 are joined with an adhesive or the like. Further, the first pier 103a is inserted into the first pier recess 21A of the first plate portion 11, and the second pier 103b is inserted into the second pier recess 22A of the second plate portion 12. Then, the first plate portion 11 and the second plate portion 12 are joined to the first pier 103a and the second pier 103b with an adhesive or the like.

Next, as shown in FIG. 25, the third plate portion 13 is attached to the first plate portion 11, the second plate portion 12, and the pair of fourth plate portions 14, 15. More specifically, the third plate portion 13 is arranged between the first front plate portion 31 of the first plate portion 11 and the second front plate portion 32 of the second plate portion 12. Then, the thin portion 33A and the thick portion 33B of the third plate portion 13 are brought into contact with the end surface 31A of the first front plate portion 31 of the first plate portion 11, and the thin portion 33A of the third plate portion 13 is first. The side surface of the convex portion 21B of the plate portion 11, the side surface of the pair of fourth plate portions 14 and 15, the end faces 52A and 62A of the pair of face materials 52 and 62 of the second plate portion 12, and the second plate portion 12. The thick portion 33B of the third plate portion 13 is brought into contact with the end surface of the core material 42, the upper surface of the fourth plate portion 14, the upper surface of the second horizontal plate portion 22 of the second plate portion 12, and the second. It abuts against the side surface of the second front plate portion 32 of the plate portion 12, and the thin end portion 33C of the third plate portion 13 abuts on the end surface 32A of the second front plate portion 32 of the second plate portion 12. Then, the third plate portion 13 is joined to the first plate portion 11, the second plate portion 12, and the pair of fourth plate portions 14, 15 with an adhesive or the like. As a result, the building board 1A is attached to the protruding corner wall 10.

Here, if the angle between the first wall surface 101a and the second wall surface 101b is not 90 °, the pair of face materials 51 and 61 are cut and the end faces 14A and 15A and the end faces 14B and 15B are tilted. Then, by V-cutting and bending the third plate portion 13, the third plate portion 13 comes into contact with the first plate portion 11, the second plate portion 12, and the pair of fourth plate portions 14, 15. As a result, the first plate portion 11 and the second plate portion 12 can be aligned with the first wall surface 101a and the second wall surface 101b. In this case, it is preferable to set the protruding length of the convex portion 21B so that a gap is formed between the convex portion 21B of the first plate portion 11 and the core material 42 of the second plate portion 12. As a result, the first plate portion 11 and the second plate portion 12 can be easily tilted. However, by cutting the convex portion 21B diagonally, the convex portion 21B of the first plate portion 11 and the core material 42 of the second plate portion 12 may be in contact with each other.

The first pier 103a and the second pier 103b may be inserted into the first pier recess 21A and the second pier recess 22A during the assembly of the building board 1A as described above. It may be after all the building board materials 1A have been assembled.

As described above, in the building plate material 1 according to the present embodiment, the pair of fourth plate portions 14 and 15 attached to the front and back surfaces of the convex portion 21B of the first plate portion 11 is inserted into the concave portion 22B. In this state, the end faces 51A and 61A of the pair of face materials 51 and 61 of the first plate portion 11 and the side surfaces 52B and 62B of the pair of face materials 52 and 62 of the second plate portion 12 are in contact with each other. Therefore, the angle formed by cutting the pair of fourth plate portions 14 and 15 and forming the end faces 14A and 15A of the pair of fourth plate portions 14 and 15 with the end faces 14B and 15B of the pair of fourth plate portions 14 and 15. By adjusting, the angle formed by the first direction D1 which is the extending direction of the first plate portion 11 and the second direction D2 which is the extending direction of the second plate portion 12 can be changed. As a result, even if the angle between the first wall surface 101a and the second wall surface 101b is not 90 °, the first plate portion 11 and the second plate portion 12 are aligned with the first wall surface 101a and the second wall surface 101b. be able to.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and can be appropriately modified.

For example, in the above embodiment, the building board of the present invention has been described as being applied to the building board of Cove lighting, but as shown in FIG. 26, it may be applied to the building board 1B of the curtain box. .. In the building board 1B, the front plate portion is connected to the horizontal plate portion so as to extend downward from the horizontal plate portion, and the curtain rail 104 is attached to the lower surface of the horizontal plate portion.

Further, in the above embodiment, the second plate portion and the third plate portion have been described as separate members, but the second plate portion and the third plate portion may be a single member. In this case, for example, in the second plate portion, the face material arranged on the lower surface side of the horizontal plate portion is widened in the second direction (direction orthogonal to the first direction), and is V-cut and bent. Can be formed.

Further, in the above embodiment, the third plate portion has been described as forming only a part of the front plate portion, but the third plate portion is assumed to form not only the front plate portion but also a part of the horizontal plate portion. Eggplant is also good.

Further, in the above embodiment, the convex portion of the first plate portion and the core material of the second plate portion are in contact with each other, but the convex portion of the first plate portion and the core material of the second plate portion are in contact with each other. May be separated.

By the way, the edge surface of the face material constituting the third plate portion is exposed on the surface of the building plate material, but as the face material constituting the third plate portion, a wooden sheet, a paper-based sheet, a resin sheet or the like is used on the surface. When a thin plate or the like to which a sheet is attached is used, the edge surface is not covered with the sheet. Therefore, the edge surface may be covered with a sheet by V-cutting and bending the end portion of the face material constituting the third plate portion. In this case, V-cutting and bending may be performed on either the front surface side or the back surface side of the face material constituting the third plate portion.

1,1A, 1B ... Building board material, 2 ... Horizontal board part, 3 ... Front board part, 4 ... Core material, 5,6 ... Face material, 10 ... Outer corner wall, 11, 11A ... First end part, 12 , 12A ... 2nd end, 13 ... 3rd plate, 14, 15 ... 4th plate, 14A, 15A ... end face, 14B, 15B ... end face, 21 ... 1st horizontal plate, 21A ... for 1st pier Concave, 21B ... Convex, 22 ... Second horizontal plate, 22A ... Second railing recess, 22B ... Recess, 31 ... First front plate, 31A ... End face, 32 ... Second front plate, 32A ... End face , 33 ... Third front plate part, 33A ... Thin wall part, 33B ... Thick wall part, 33C ... Thin wall end part, 41 ... Core material, 41A ... Groove, 41B ... Square pillar member, 42 ... Core material, 42A ... Groove, 42B ... Square pillar member, 51, 61 ... Face material, 51A, 61A ... End face, 52, 62 ... Face material, 52A, 62A ... End face, 52B, 62B ... Side surface, 101 ... Outer corner wall, 101a ... First wall surface, 101b ... Second wall surface, 102 ... Lighting equipment, 103 ... Rail, 103a ... First rail, 103b ... Second rail, 104 ... Curtain rod.

Claims (7)

A horizontal plate portion attached to a protruding corner wall formed by a first wall surface and a second wall surface having a structure in which a pair of facing materials are attached to the front and back surfaces of the core material, and the protruding corner wall of the horizontal plate portion. It is a building board material provided with a front board portion provided at the end on the opposite side of the wall.
A first plate portion that extends in the first direction and forms a part of the horizontal plate portion and the front plate portion and is attached to the first wall surface.
A second plate portion that is connected to the first plate portion and extends in a second direction that intersects the first direction, forms a part of the horizontal plate portion and the front plate portion, and is attached to the second wall surface.
A third plate portion extending in the first direction and forming a part of the front plate portion is provided.
The first plate portion has a convex portion in which the core material protrudes from the pair of face materials and the front plate portion.
The second plate portion has a concave portion into which the convex portion is inserted between the pair of face materials.
The third plate portion is in contact with the end surface of the front plate portion of the first plate portion and the end surface of the front plate portion of the second plate portion.
Building board. The protruding corner wall is provided with a receiving rail for attaching the building board material.
The horizontal plate portion of the first plate portion has a first rail receiving recess in which the rail is inserted between the pair of face materials at the end portion on the first wall surface side.
The horizontal plate portion of the second plate portion has a second rail receiving recess in which the rail receiving rail is inserted between the pair of face materials at the end portion on the second wall surface side.
The building board material according to claim 1. The core material of the first plate portion extends to the first end portion of the first plate portion on the side connected to the second plate portion.
The core material of the second plate portion extends to the second end portion of the second plate portion on the side connected to the first plate portion.
The building board material according to claim 1 or 2. The core material of the first plate portion and the core material of the second plate portion are in contact with each other.
The building board material according to any one of claims 1 to 3. The front plate portion is formed of any one of the pair of face materials.
The building board material according to any one of claims 1 to 4. The pair of face materials of the first plate portion and the pair of face materials of the second plate portion are in contact with each other.
The building board material according to any one of claims 1 to 5. Further provided with a pair of fourth plate portions attached to the front and back surfaces of the convex portion of the first plate portion.
The pair of fourth plate portions are in contact with the end faces of the pair of face materials of the first plate portion and the end faces of the pair of face materials of the second plate portion.
The building board material according to any one of claims 1 to 5.

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