JP7366826B2 - building board - Google Patents

Description

TECHNICAL FIELD The present invention relates to an architectural board material, that is, a building board that can be used for exterior finishing and interior finishing of buildings.

For example, inorganic boards such as ceramic siding boards, slag gypsum boards and metal siding boards, fiberboards such as particle boards, and resin boards are used as architectural board materials for configuring the external and internal walls of buildings. It may happen. When constructing a wall using building boards, multiple building boards are joined together vertically and horizontally. Such building boards are often manufactured in a shape having a design surface with various uneven shapes to enhance the design. The design surfaces of building boards include a design surface with a border-like pattern, a design surface with a brick-like pattern, and a design surface with a masonry-like pattern. A technique related to a building board having a designed surface is described, for example, in Patent Document 1 below.

Japanese Patent Application Publication No. 2015-140595

When storing or transporting building boards, multiple building boards may be stacked in the thickness direction. For example, a plurality of building boards are stacked such that the design surfaces or back surfaces of adjacent building boards face each other. However, when building boards are stacked, the convex portions included in the uneven shape of the design surface of the building boards may be damaged due to contact with adjacent building boards. When stacking building boards, for example, the designed surface of the building board rubs against an adjacent building board, which may damage the protrusions on the designed surface.

The present invention was devised under these circumstances, and aims to provide a building board suitable for realizing a design with rich changes in shading and suppressing damage to the design during stacking. With the goal.

The building board provided by the present invention has a designed surface and a back surface opposite to the designed surface, and has a thickness between the designed surface and the back surface. The design surface has a plurality of handles each extending in the first direction and at least one joint groove extending in the first direction. The plurality of handle portions are arranged in parallel in a second direction intersecting the first direction with a joint groove interposed therebetween. Each handle has a pair of top surfaces. The pair of top surfaces are spaced apart from each other in the second direction, and each extends in the first direction. Additionally, the plurality of handles include a twisted handle. The twisted handle has a twisted surface extending in the first direction between a pair of top surfaces in the second direction. The twisted surface is located at a position from the top surface to the back surface side in the thickness direction, and the normal direction of the cross section extending in the thickness direction and the second direction gradually changes over the first direction.

In this building board, as described above, the plurality of handles (each extending in the first direction) on the design surface include a twisted handle, and the twist handle has a shape between a pair of top surfaces and a space between the top surfaces. It has a twisted surface. As described above, in the twisted surface, the normal direction of the cross section extending in the building board thickness direction and the second direction gradually changes (gradually changes) over the first direction. That is, the twisted surface is gently twisted and has smooth undulations. Due to its gentle twist, such a twisted surface is suitable for expressing soft shadows whose shading gradually changes over the first direction.

Further, in the twisted handle portion, such a twisted surface is located between the pair of top surfaces in the second direction and on the back side from the top surface in the thickness direction of the building board, as described above. Such a configuration is suitable for realizing a configuration in which the height difference in the thickness direction of the building board between both top surfaces and the torsion surface gradually changes over the first direction, and therefore, the height difference between the torsion surface and each top surface changes gradually in the first direction. At each boundary, it is useful to express a shade whose density changes over the first direction.

In this building board, the plurality of handles that extend in the first direction and are arranged in parallel in the second direction via joint grooves include the twisted handles as described above. In terms of its design, this kind of building board is suitable for realizing a design with rich variations in shading.

In addition, in this building board, as described above, each of the plurality of handles extending in the first direction on the design surface and paralleling in the second direction via the joint grooves is spaced apart from each other in the second direction. It has a pair of top surfaces extending in one direction. In each handle, the top surface has the highest height from the back surface in the thickness direction of the building board, and the other parts other than the top surface are located on the back side from the top surface in the thickness direction of the building board. (In a twisted handle, the twisted surface is located from the top to the back side). Such a configuration helps to prevent the uneven shape formed between the top surfaces of each handle from coming into contact with adjacent building boards when a plurality of building boards are stacked, and therefore, It is suitable for suppressing damage to a design that includes the uneven shape.

As described above, the present building board is suitable for realizing a design with a rich variety of shadows and for suppressing damage to the design during stacking.

The length of the top surface of the handle in the second direction preferably varies gradually over the first direction. Such a configuration is suitable for imparting a change in shading to the handle of the building board, and ultimately to the design surface.

The twisted handle preferably includes a twisted handle slope. The twisted handle inclined surface extends from one of the pair of top surfaces toward the back surface on the side of the other top surface, and extends in the first direction. In the twisted handle, preferably, in a cross section extending in the thickness direction and the second direction, the opening angle between the top surface and the twisted handle inclined surface descending from the top surface gradually changes over the first direction. . Further, the twisted surface preferably includes a portion connected to the twisted handle inclined surface and a portion connected to the top surface at each of both ends in the second direction. These configurations are useful for imparting changes in shading to the twisted handle portion of the building board and, ultimately, to the design surface.

The plurality of handles preferably includes a recessed handle. The recessed handle portion has a first recessed handle inclined surface and a second recessed handle inclined surface. The first recessed pattern inclined surface descends from one of the pair of top surfaces toward the back surface on the side of the other top surface. The second dimple pattern slope descends from the other top surface toward the back surface on the side of one top surface, and connects with the first dimple pattern slope. The hollow handle preferably has a boundary line non-perpendicular to the second direction between the first hollow handle slope and the second hollow handle slope. In the hollow handle, preferably, in a cross section extending in the thickness direction and the second direction, the opening angle between the top surface and the slope of the hollow handle descending from the top surface gradually changes over the first direction. .

According to such a concave handle, it is possible to express a different shade from that of the above-mentioned twisted handle. The structure in which the plurality of handles in the present building board include the above-mentioned twisted handle and the recessed handle is useful for enhancing the design of the present building board.

Preferably, the handle is longer than the joint groove in the second direction. In terms of design, such a configuration helps to make the handle stand out, and is therefore suitable for ensuring design.

The handle preferably has an inclined end surface. The inclined end surface descends from one of the pair of top surfaces toward the back surface on the opposite side to the other top surface. In the cross section extending in the thickness direction and the second direction, the opening angle between the top surface and the sloped end surface descending from the top surface is the angle between the twisted handle slope surface descending from the top surface and the top surface. smaller than the opening angle. Alternatively, in the cross section extending in the thickness direction and the second direction, the opening angle between the top surface and the sloped end surface descending from the top surface is the angle between the concave pattern slope surface descending from the top surface and the top surface. smaller than the opening angle between. These configurations are preferable from the standpoint of emphasizing the outline of each handle portion in terms of design.

The plurality of top surfaces of the plurality of handles are preferably located on the same virtual plane. Such a configuration is suitable for stably stacking a plurality of main building boards in the thickness direction. In addition, this configuration helps to prevent the uneven shape formed between the top surfaces of each handle from coming into contact with adjacent building boards when a plurality of main building boards are stacked. It is suitable for suppressing damage to a design that includes the uneven shape.

FIG. 1 is a plan view of a building board according to a first embodiment of the present invention. FIG. 2 is a sectional view taken along line II-II of the building board shown in FIG. 1. FIG. FIG. 2 is a sectional view (partially omitted) of the building board shown in FIG. 1 along line III-III. FIG. 2 is a partially enlarged plan view of the building board shown in FIG. 1. FIG. 5 is a V-V sectional view of the building board shown in FIG. 4. FIG. Represents cross sections at multiple locations in the twisted handle. Represents cross sections at multiple locations in the hollow handle. FIG. 2 is a plan view of a wall construction structure using a plurality of building boards according to the first embodiment. It is a top view of the building board concerning the 2nd embodiment of the present invention. FIG. 7 is a plan view of a wall construction structure using a plurality of building boards according to a second embodiment.

1 to 3 represent a building board X1 according to a first embodiment of the present invention. FIG. 1 is a plan view of the building board X1, and FIG. 2 is a sectional view taken along line II-II of the building board X1 shown in FIG. Figure 3 is Figure 1
It is a III-III cross-sectional view (partially omitted cross-sectional view) of the building board X1 shown in FIG.

The building board X1 has a designed surface S and a back surface B opposite to the designed surface S, and has a thickness between the designed surface S and the back surface B. The building boards X1 are building boards for constructing the outer and inner walls of a building, and when constructing the wall, multiple building boards X1 are vertically (vertically) and horizontally (horizontally) It is something that is pieced together.

As shown in FIG. 1, the design surface S of the building board X1 has a pair of edges E1, extending in the first direction D1,
The outer shape is defined by E2 and a pair of edges E3 and E4 extending in a second direction D2 intersecting the first direction D1. The first direction D1 and the second direction D2 are orthogonal in this embodiment.

Regarding the design surface S of the building board X1, the dimension in the first direction D1 is, for example, 910 to 3030 mm, and the dimension in the second direction D2 is, for example, 160 to 910 mm. The thickness of the building board X1, that is, the dimension between the design surface S and the back surface B in the thickness direction T shown in FIG. 2, for example, is 14 to 26 mm. The building board X1 is, for example, a ceramic siding board, an inorganic board such as a slag gypsum board or a metal siding board, a fiber board such as a particle board, or a resin board.

The designed surface S of the building board X1 has a plurality of handles 10 and at least one joint groove 20 (the case where the designed surface S has a plurality of joint grooves 20 is illustrated as an example). The handle portion 10 and the joint groove 20 extend in the first direction D1. The plurality of handle parts 10 are arranged in parallel in the second direction D2 with the joint groove 20 interposed therebetween.

In this embodiment, the plurality of handle portions 10 include a twisted handle portion 10A and a recessed handle portion 10B. The length of the handle 10 in the second direction D2, that is, the width of the handle 10 is, for example, 30 to 450 mm, preferably 30 to 50 mm. In this embodiment, the handle portion 10 is longer than the joint groove 20 in the second direction D2.

As shown in FIGS. 4 and 5, the twisted handle portion 10A has a pair of top surfaces 11, a twisted surface 12, a twisted handle inclined surface 13, and an inclined end surface 14 (for clarity of illustration, In FIGS. 1 and 4, each top surface 11 of the twisted handle portion 10A and each top surface 11 of the recessed handle portion 10B, which will be described later, are indicated by hatching).

The pair of top surfaces 11 are spaced apart from each other in the second direction D2, and each extends in the first direction D1. In the handle part 10, the top surface 11 has the highest height from the back surface B in the thickness direction T, and the other parts other than the top surface 11 are from the top surface 11 to the back surface B side in the thickness direction T. in position. Moreover, the length of the top surface 11 in the second direction D2, that is, the width of the top surface 11, preferably changes gradually over the first direction D1. The width of the top surface 11 is, for example, in the range of 5 to 50 mm, preferably in the range of 5 to 15 mm.

In this embodiment, the top surface 11 is flat and parallel to the back surface B. The configuration in which the top surface 11 is flat and parallel to the back surface B is suitable for stably stacking a plurality of building boards X1 in the thickness direction T thereof.

The twisted surface 12 is located between the pair of top surfaces 11 in the second direction D2 and extends in the first direction D1. The twisted surface 12 is located at a position on the back surface B side from the top surface 11 in the thickness direction T, as shown in FIGS. 2 and 5.

Further, in the twisted surface 12, the normal direction N in the cross section extending in the thickness direction T and the second direction D2 is, for example, as shown in FIGS. 6(a), 6(b), and 6(c). It changes gradually over the first direction D1. 6(a), 6(b), and 6(c) each represent a cross section (a cross section extending in the thickness direction T and second direction D2) at a predetermined location in the twisted handle portion 10A. The normal direction N of the twisted surface 12 changes continuously between the location shown in FIG. 6(a) and the location shown in FIG. 6(b), and the normal direction N of the twisted surface 12 changes continuously between the location shown in FIG. It changes continuously between the part shown in (c). The width of change (maximum value of angular difference in direction) in the normal direction N of the twisted surface 12 over the first direction D1 is, for example, 20 to 160 degrees.

The twisted handle inclined surface 13 is a surface that is inclined between the top surface 11 and the twisted surface 12 in the twisted handle portion 10A. Specifically, the twisted pattern inclined surface 13 descends from one of the pair of top surfaces 11 toward the back surface B on the side of the other top surface 11 and reaches the twisted surface 12 . Along with this, the twisted handle inclined surface 13 extends in the first direction D1. Moreover, the length of the twisted pattern inclined surface 13 in the second direction D2, that is, the width of the twisted pattern inclined surface 13, preferably changes gradually over the first direction D1. The above-described twisted surface 12 includes a portion connected to the twisted pattern inclined surface 13 and a portion connected to the top surface 11 at each of both ends in the second direction D2.

The opening angle θ ₁ (shown in FIG. 6(a)) between the top surface 11 and the twisted pattern slope surface 13 descending from the top surface 11 in the cross section extending in the thickness direction T and the second direction D2 is preferably is gradually changing over the first direction D1. The opening angle θ ₁ is, for example, within a range of 110 to 179 degrees.

The inclined end surface 14 is a surface inclined at the end of the twisted handle portion 10A in the second direction D2. Specifically, the inclined end surface 14 descends from one of the pair of top surfaces 11 toward the back surface B on the side opposite to the other top surface 11 (that is, on the joint groove 20 side). Along with this, the inclined end surface 14 extends in the first direction D1.

The opening angle θ ₂ (shown in FIG. 6(b)) between the top surface 11 and the inclined end surface 14 descending from the top surface 11 in the cross section extending in the thickness direction T and the second direction D2 is, for example, 110~ It is 150 degrees, and is preferably smaller than the opening angle θ ₁ between the twisted handle inclined surface 13 descending from the same top surface 11 and the top surface 11.

As shown in FIGS. 4 and 5, the hollow handle portion 10B has a pair of top surfaces 11, an inclined end face 14, a first hollow handle inclined surface 15A, and a second hollow handle inclined surface 15B. The top surface 11 and the inclined end surface 14 of the concave handle portion 10B have the same configuration as the top surface 11 and the inclined end surface 14 of the twisted handle portion 10A.

In the hollow handle portion 10B, the hollow handle inclined surface 15A (first hollow handle inclined surface) descends from one top surface 11 of the pair of top surfaces 11 toward the back surface B on the side of the other top surface 11. The hollow pattern inclined surface 15B (second hollow pattern inclined surface) descends from the other top surface 11 toward the back surface B on the one top surface 11 side. The dimple pattern inclined surfaces 15A and 15B are connected to each other and form a boundary line 16. That is, the hollow handle portion 10B has the hollow handle inclined surface 15A,1.
There is a boundary line 16 between 5B. The boundary line 16 is preferably non-perpendicular to the second direction D2.

In the recessed handle portion 10B, the opening angle θ ₃ between the top surface 11 and the recessed handle inclined surface 15A descending from the top surface 11 in the cross section extending in the thickness direction T and the second direction D2 (FIG. 7(b) ) is preferably gradually varied over the first direction D1. 7(a), FIG. 7(b), and FIG. 7(c) each represent a cross section (a cross section extending in the thickness direction T and second direction D2) at a predetermined location in the recessed handle portion 10B. The opening angle θ ₃ is, for example, within the range of 110 to 179 degrees.

In the recessed handle portion 10B, the opening angle θ ₄ between the top surface 11 and the recessed handle inclined surface 15B descending from the top surface 11 in the cross section extending in the thickness direction T and the second direction D2 (FIG. 7(b) ) is preferably gradually varied over the first direction D1. The opening angle θ ₄ is, for example, within a range of 110 to 179 degrees.

In the recessed handle portion 10B, the opening angle _θ 2 between the top surface 11 and the inclined end surface 14 descending from the top surface 11 in the cross section extending in the thickness direction T and the second direction D2 (as shown in FIG. 7(b) ) is, for example, 110 to 150 degrees, and preferably the opening angle θ ₃ (or, is smaller than the opening angle θ ₄ ).

The joint groove 20 on the design surface S is located between the handle portions 10. That is, the joint groove 20 is located between the twisted handle parts 10A, between the recessed handle parts 10B, or between the twisted handle parts 10A and the recessed handle parts 10B. The length of the joint groove 20 in the second direction D2, that is, the width of the joint groove 20 is, for example, 1 to 20 mm. The width of the joint groove 20 is preferably the same across the first direction D1.

In this embodiment, the plurality of top surfaces 11 of the plurality of handle parts 10 (twisted handle part 10A, recessed handle part 10B) are located on the same virtual plane. The length from the back surface B to the top surface 11, that is, the height of the top surface 11 with respect to the back surface B (corresponding to the above-mentioned building board thickness dimension) is, for example, 14 to 26 mm.

As shown in FIG. 2, in this embodiment, the building board X1 has a front side joint part 31 for interlocking seams at the edge E1 and its vicinity, and at the edge E2 and its vicinity, It has a back side joint part 32 for interlock seaming. The front side joint part 31 and the back side joint part 32 may be provided with a sealing part (not shown) for filling the gap between the members in the interlocking joint. The two building boards X1 can be joined together via their edges E1, E2. Specifically, the edge E1 side of one building board X1 and the edge E2 side of the other building board X1 can be joined by joining.

As shown in FIG. 3, in this embodiment, the building board X1 has a front side joint part 33 for interlocking seams at an edge E3 and its vicinity, and at an edge E4 and its vicinity, It has a back side joint portion 34 for interlock seaming. The front side joint part 33 and the back side joint part 34 may be provided with a sealing part (not shown) for filling the gap between the members in the mutually joining joint. The two building boards X1 can be joined together via their edges E3 and E4. Specifically, the edge E3 side of one building board X1 and the edge E4 side of the other building board X1 can be joined by joining.

When constructing a wall using the building boards X1 having the above configuration, a plurality of building boards X1 are joined together in the vertical direction (vertical direction) and the left-right direction (horizontal direction). Specifically, a plurality of building boards X1 are connected by joining their ends (edges E1, E2) in the second direction D2, for example, in the vertical direction, and the plurality of building boards X1 are The ends (edges E3, E4) in the first direction D1 are joined together in the left-right direction, for example.

FIG. 8 shows an example of a wall construction structure using a plurality of building boards X1. In the example of the wall construction structure shown in FIG. 8, two building boards
2), and the two building boards X1 in each row are connected to their edges E3 and E4.
They are spliced and connected in the left-right direction (first direction D1) via.

In the building board X1, as described above, the plurality of handles 10 (each extending in the first direction D1) on the design surface S include the twisted handle 10A, and the twist handle 10A is connected to the pair of top surfaces 11 and the corresponding It has a twisted surface 12 between the top surfaces 11. As described above, in the twisted surface 12, the normal direction N in the cross section extending in the thickness direction T and the second direction D2 of the building board X1 gradually changes over the first direction D1. That is, the twisted surface 12 is gently twisted and has smooth undulations. Due to its gentle twist, such a twisted surface 12 is suitable for expressing soft shadows whose shading gradually changes over the first direction D1.

Further, in the twisted handle portion 10A, such a twisted surface 12 is located between the pair of top surfaces 11 in the second direction D2, on the back surface B side from the top surface 11, as described above. Such a configuration is suitable for realizing a configuration in which the height difference in the thickness direction T between both top surfaces 11 and the twisted surface 12 gradually changes over the first direction D1, and therefore At each boundary with the surface 11, it is useful for expressing a shadow whose density changes over the first direction D1.

In the building board X1, the plurality of handles 10 extending in the first direction D1 on the design surface S and arranged in parallel in the second direction D2 via the joint grooves 20 include the twisted handle 10A as described above. Such a building board X1 is suitable for realizing a design with rich variations in shading on its design surface S.

In addition, in the building board X1, as described above, each of the plurality of handles 10 extending in the first direction D1 on the design surface S and paralleling in the second direction D2 via the joint grooves 20 extends in the second direction D2. It has a pair of top surfaces 11 spaced apart from each other and extending in the first direction D1. In each handle 10, the top surface 11 has the highest height from the back surface B in the thickness direction T, and other parts other than the top surface 11 are from the top surface 11 to the back surface B in the thickness direction T. It is located at Such a configuration is effective in preventing the uneven shape formed between the top surfaces 11 of each handle 10 from coming into contact with the adjacent building boards X1 when a plurality of building boards X1 are stacked. Therefore, it is suitable for suppressing damage to a design that includes the uneven shape.

As described above, the building board X1 is suitable for realizing a design with a rich variety of shadows and for suppressing damage to the design during stacking.

In the building board X1, as described above, the length of the top surface 11 of the handle portion 10 in the second direction D2 preferably changes gradually over the first direction D1. Such a configuration is suitable for imparting a change in shading to the handle portion 10 of the building board X1, and ultimately to the design surface S.

In the building board X1, as described above, the twisted pattern inclined surface 13 of the twisted pattern part 10A descends from one top surface 11 of the pair of top surfaces 11 toward the back surface B on the side of the other top surface 11, Moreover, it extends in the first direction D1. Further, the opening angle θ ₁ between the top surface 11 and the twisted handle slope surface 13 descending from the top surface 11 in the cross section extending in the thickness direction T and the second direction D2 preferably extends over the first direction D1. It's changing gradually. In addition, the twisted surface 12 includes a portion connected to the twisted pattern inclined surface 13 and a portion connected to the top surface 11 at each of both ends in the second direction D2. These configurations are useful for imparting changes in shading to the twisted handle portion 10A of the building board X1, and ultimately to the design surface S.

The twisted handle portion 10A has the inclined end surface 14 that descends from the top surface 11 toward the back surface B, as described above. As described above, the opening angle θ ₂ between the top surface 11 and the inclined end surface 14 descending from the top surface 11 in the cross section extending in the thickness direction T and the second direction D2 is preferably the same as that of the top surface 11 as described above. It is smaller than the opening angle θ ₁ between the twisted handle inclined surface 13 descending from the top surface 11 and the top surface 11 . Such a configuration is preferable for emphasizing the outline of the twisted handle portion 10A on the design surface S.

In the building board X1, as described above, the hollow pattern inclined surface 15A of the hollow pattern part 10B descends from one top surface 11 of the pair of top surfaces 11 toward the back surface B on the side of the other top surface 11, The dimple pattern inclined surface 15B descends from the other top surface 11 toward the back surface B on the side of one top surface 11, and the dimple pattern slope surfaces 15A and 15B are connected to form a boundary line 16. As mentioned above, this boundary line 16 is preferably non-perpendicular to the second direction D2. In addition, the opening angle _{θ 3} between the top surface 11 and the hollow pattern inclined surface 15A (or the hollow pattern inclined surface 15B) descending from the top surface 11 in the cross section extending in the thickness direction T and the second direction D2. (Opening angle θ ₄ ) preferably changes gradually over the first direction D1.

According to such a recessed handle part 10B, it is possible to express a different shade on the building board X1 than that of the twisted handle part 10A. The configuration in which the plurality of handles 10 in the building board X1 include the above-described twisted handle 10A and the recessed handle 10B is useful for enhancing the design of the building board X1.

The recessed handle portion 10B has an inclined end surface 14 that descends from the top surface 11 toward the back surface B, similarly to the twisted handle portion 10A. As described above, the opening angle θ ₂ between the top surface 11 and the inclined end surface 14 descending from the top surface 11 in the cross section extending in the thickness direction T and the second direction D2 is preferably from the top surface 11 to It is smaller than the opening angle θ ₃ between the downward concave pattern inclined surface 15A and the top surface 11. Further, as described above, the opening angle θ ₂ between the top surface 11 and the inclined end surface 14 descending from the top surface 11 in the cross section extending in the thickness direction T and the second direction D2 is The opening angle θ between the downward concave pattern inclined surface 15B and the top surface 11 is smaller than ₄ . These configurations are preferable for emphasizing the outline of the recessed handle portion 10B on the design surface S.

In the building board X1, as described above, the handle portion 10 is longer than the joint groove 20 in the second direction D2. Further, as described above, the length of the joint groove 20 in the second direction D2 is preferably the same across the first direction D1. These configurations are useful for making the handle portion 10 stand out on the design surface S, and are therefore suitable for ensuring design quality.

As described above, the plurality of top surfaces 11 of the plurality of handle parts 10 are located on the same virtual plane. Such a configuration is suitable for stably stacking a plurality of building boards X1 in the thickness direction. In addition, this configuration is effective in preventing the uneven shape formed between the top surfaces 11 of each handle 10 from coming into contact with the adjacent building boards X1 when a plurality of building boards X1 are stacked. Therefore, it is suitable for suppressing damage to a design that includes the uneven shape.

FIG. 9 shows a building board X2 according to a second embodiment of the present invention (FIG. 9 is a plan view of the building board X2).

The building board X2 has a designed surface S and a back surface B opposite to the designed surface S, and has a thickness between the designed surface S and the back surface B. The design surface S of the building board X2 has a twisted handle 10A as a plurality of handles 10 and at least one joint groove 20 (the case where the design surface S has a plurality of joint grooves 20 is illustrated as an example) do). The design surface S of the building board (twisted handle portion 10A). The building board X2 differs from the above-described building board X1 in this point.

Such a building board X2 can be used for construction of a wall section similarly to the building board X1. FIG. 10 shows an example of a wall construction structure using a plurality of building boards X2. In the example of the wall construction structure shown in FIG. 10, two building boards X2 in each row are joined together in the vertical direction (second direction D2) via their edges E1 and E2, and two building boards in each row The building boards X2 are joined together in the left-right direction (first direction D1) via their edges E3 and E4.

The building board X2 is suitable for realizing a design with rich changes in shading and suppressing damage to the design during stacking for the same reasons as described above with respect to the building board X1. According to the building board X2, it is possible to enjoy the same technical effects as described above regarding the building board X1, except for the technical effects based on the recessed handle portion 10B.

x1, Surface 16 Boundary line 20 Grasp

Claims (12)

A building board having a designed surface and a back surface opposite to the designed surface, and having a thickness between the designed surface and the back surface,
The design surface is
at least one groove extending in the first direction;
a plurality of handles arranged in parallel via the joint groove in a second direction intersecting the first direction, and each extending in the first direction;
The handle has a pair of top surfaces spaced apart from each other in the second direction and each extending in the first direction,
The plurality of handles include a twisted handle,
The twisted handle has a twisted surface extending in the first direction between the pair of top surfaces in the second direction,
The twisted surface is located from the top surface to the back surface side in the thickness direction, and the normal direction of a cross section extending in the thickness direction and the second direction extends across the first direction. A building board that changes gradually. The building board according to claim 1, wherein the length of the top surface in the second direction gradually changes over the first direction. The twisted handle includes a twisted handle slope,
The architecture according to claim 1 or 2, wherein the twisted pattern inclined surface extends from one top surface of the pair of top surfaces toward the back surface on the side of the other top surface, and extends in the first direction. Board. In the twisted handle, in a cross section extending in the thickness direction and the second direction, the opening angle between the top surface and the twisted handle inclined surface descending from the top surface is such that the opening angle extends across the first direction. 4. The building board of claim 3, which is graded. The building board according to claim 3 or 4, wherein the twisted surface includes a portion connected to the twisted pattern inclined surface and a portion connected to the top surface on each of both edges in the second direction. The plurality of handle portions include a recessed handle portion having a first recessed handle inclined surface and a second recessed handle inclined surface,
The first concave pattern inclined surface descends from one of the pair of top surfaces toward the back surface on the side of the other top surface,
6. The method according to claim 1, wherein the second depression pattern slope descends from the other top surface toward the back surface on the side of the one top surface, and connects with the first depression pattern slope. Architectural board listed in any one of the above. 7. The architecture according to claim 6, wherein the recess handle has a boundary line that is non-perpendicular to the second direction between the first recess handle slope surface and the second recess handle slope surface. Board. In the recessed handle, in a cross section extending in the thickness direction and the second direction, the opening angle between the top surface and the recessed handle inclined surface descending from the top surface extends across the first direction. 8. A building board according to claim 6 or 7, which is graded. The building board according to any one of claims 1 to 8, wherein the handle is longer than the joint groove in the second direction. The handle has an inclined end surface that descends from one of the pair of top surfaces toward the back surface on the opposite side to the other top surface,
In a cross section extending in the thickness direction and the second direction, the opening angle between the top surface and the sloped end surface descending from the top surface is the angle between the twisted handle slope surface descending from the top surface and the top surface. The building board according to any one of claims 3 to 5, which is smaller than the opening angle between. The handle has an inclined end surface that descends from one of the pair of top surfaces toward the back surface on the opposite side to the other top surface,
In the cross section extending in the thickness direction and the second direction, the opening angle between the top surface and the sloped end surface descending from the top surface is the angle between the dimple pattern slope surface descending from the top surface and the top surface. The building board according to any one of claims 6 to 8, wherein the opening angle is smaller than the opening angle between the building board and the building board. The building board according to any one of claims 1 to 11, wherein a plurality of top surfaces of the plurality of handle portions are located on the same virtual plane.