Building boards and construction structure of building boards

Abstract

To provide a building board and an installation structure of the building board capable of guiding rain water flowing along the surface to a predetermined part.SOLUTION: A building board 1 is provided with a plurality of water guide parts 3 in three-dimensional shapes on a surface 20 of a substrate 2. Each of the plurality of water guide parts 3 has a guide surface 30 oblique toward a predetermined part P in the surface 20. An installation structure of the building board 1 is a structure so as that building boards 1 are arranged in a zigzag state. An upper building board 1 has the predetermined part P at a position offset in a right and left direction relating to a projected part in a right and left direction of a lower building board 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a building board and a construction structure for the building board. [Background technology]

[0002] Patent Document 1 describes a flat roofing material having a plurality of wood-grain patterned vertical grooves on its surface. The vertical grooves are formed along the flow direction on the exposed surface of the flat roofing material. The vertical grooves are connected at appropriate points by horizontal grooves. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 61-3825 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, when a roof is formed by installing multiple flat roofing materials as described in Patent Document 1, rainwater tends to flow along the vertical grooves. However, when multiple flat roofing materials are installed in a staggered pattern, there is a risk that rainwater flowing down the vertical grooves of the upper flat roofing material will flow into the left-right abutments of the lower flat roofing material.

[0005] In view of the above circumstances, the present invention aims to provide a building board and a construction structure for the building board that can easily guide rainwater running down the surface to a specified portion. [Means for solving the problem]

[0006] A building board in one embodiment of the present invention has a plurality of water guide portions having a three-dimensional shape provided on the surface of a base material, and each of the plurality of water guide portions has a guide surface that slopes downwardly toward a predetermined portion of the surface.

[0007] In addition, the construction structure of the building boards of one embodiment of the present invention is a structure in which the building boards are arranged in a staggered pattern, and the upper building board has the specified portion at a position shifted left-right relative to the left-right abutment portion of the lower building board. Effect of the Invention

[0008] According to the building board and the construction structure for installing the building board of the present invention, rainwater running down the surface can be easily guided to a desired area. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1A is a front view of a building board according to a first embodiment of the present invention, and FIG. 1B is an enlarged front view of a portion A in FIG. 1A. [Diagram 2] FIG. 2A is an enlarged front view showing a portion of the first water guide portion group of the building board of the same, FIG. 2B is a cross-sectional view taken along line BB in FIG. 2A, and FIG. 2C is a cross-sectional view taken along line CC in FIG. 2A. [Diagram 3] FIG. 3A is an enlarged front view of a portion of the second water guide portion group of the building board of the same, FIG. 3B is a cross-sectional view taken along line DD in FIG. 3A, and FIG. 3C is a cross-sectional view taken along line EE in FIG. 3A. [Figure 4] FIG. 4 is a plan view showing an example of the construction of the building board of the above embodiment. [Diagram 5] FIG. 5 is a front view of a building board according to a second embodiment of the present invention. [Figure 6] 6A is an enlarged front view of a portion of the building board, FIG. 6B is a cross-sectional view taken along line GG in FIG. 6A, and FIG. 6C is a cross-sectional view taken along line HH in FIG. 6A. [Figure 7] FIG. 7 is a plan view showing an example of the construction of the building board of the same embodiment. [Figure 8] FIG. 8 is a front view of a building board according to a third embodiment of the present invention. [Figure 9] 9A is an enlarged front view of a portion of the building board of the same, FIG. 9B is a cross-sectional view taken along line II in FIG. 9A, and FIG. 9C is a cross-sectional view taken along line JJ in FIG. 9A. [Figure 10] FIG. 10 is a plan view showing an example of the construction of the building board of the above embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (Embodiment 1) 1. Overview 1A and 1B, the building board 1 of the first embodiment is provided with a plurality of water guide portions 3 having a three-dimensional shape on the surface 20 of the base material 2. Each of the plurality of water guide portions 3 has a guide surface 30 that is inclined downward toward a predetermined portion P of the surface 20.

[0011] In the building board 1 having the above-mentioned configuration, the rainwater running down the surface 20 can be guided to a predetermined portion P of the surface 20 by the guide surface 30 of the multiple water guide portions 3 provided on the surface 20 of the base material 2.

[0012] In addition, the construction structure of the building boards 1 of embodiment 1 shown in Figure 4 is a structure in which the building boards 1 are arranged in a staggered pattern, and the upper building board 1a has a predetermined portion P at a position shifted left-right relative to the left-right abutment portion Q1 of the lower building board 1b.

[0013] In a building board construction structure having the above-mentioned configuration, rainwater guided by the multiple water guide portions 3 of the upper building board 1a can be prevented from flowing into the left-right abutment portions Q1 of the lower building board 1b.

[0014] 2.Details 2-1. Architectural board Next, the building board 1 of the first embodiment shown in Figs. 1 to 3 will be described in more detail.

[0015] The building board 1 is, for example, a roofing material or a ceramic siding material, and the material of the building board 1 may be an inorganic material such as a ceramic base material or a metal base material, or an organic material such as a resin base material. The building board 1 of this embodiment is used for horizontal installation (installation in a horizontal state). The building board 1 is a rectangular plate. In the following, the components of the building board 1 will be described in detail, with the longitudinal direction of the building board 1 being the left-right direction, the lateral direction of the building board 1 being the up-down direction, and the thickness direction of the building board 1 being the front-rear direction. The surface of the building board 1 on which the multiple water guide portions 3 are formed is the front surface (front face), and the opposite side is the back surface (rear face).

[0016] The building board 1 is mainly composed of a base material 2. The base material 2 is made of, for example, a ceramic material. As shown in FIG. 1A, a surface 20 of the base material 2 is formed with a plurality of water guide portions 3 having a three-dimensional shape. The plurality of water guide portions 3 are formed by, for example, forming irregularities on the surface 20 of the base material 2 using a roll die. The irregularities on the surface 20 of the base material 2 may be press-formed using a flat press die.

[0017] In this embodiment, the multiple water guiding sections 3 include multiple first water guiding sections 3a located on the right side of a specified portion P of the surface 20 of the substrate 2, and multiple second water guiding sections 3b located on the left side of the specified portion P.

[0018] In the building board 1 of this embodiment, the surface 20 of the base material 2 is provided with two sets of combinations of a first water guide group 4 composed of a plurality of first water guide portions 3a and a second water guide group 5 composed of a plurality of second water guide portions 3b. When three imaginary lines that divide the surface 20 of the base material 2 into four equal parts in the left-right direction are imaginary lines L1, L2, and L3, the first water guide group 4 is formed on the right side of the imaginary line L1 at the left end of the surface 20 of the base material 2, and the second water guide group 5 is formed on the left side of the imaginary line L1. In addition, the first water guide group 4 is formed on the right side of the imaginary line L3 at the right end of the surface 20 of the base material 2, and the second water guide group 5 is formed on the left side of the imaginary line L3.

[0019] Each of the imaginary straight lines L1, L2, and L3 is a boundary line between the first water guiding portion group 4 and the second water guiding portion group 5. In this embodiment, each of the imaginary straight lines L1 and L3 constitutes a predetermined portion P. In other words, the predetermined portion P is located in a portion of the surface 20 of the base material 2 excluding both the left and right ends.

[0020] On the surface 20 of the base material 2, in each of four regions divided by three virtual straight lines L1, L2, and L3, the first water guide portion group 4 or the second water guide portion group 5 is provided over the entire length in the left-right direction. Also, in each of the four regions, the first water guide portion group 4 or the second water guide portion group 5 is provided over the entire length in the up-down direction. In other words, a plurality of water guide portions 3 are formed over the entire surface 20 of the base material 2.

[0021] 1B shows an enlarged view of the first water guiding portion group 4 and the second water guiding portion group 5 located on either side of the imaginary line L3 in the building board 1. As shown in FIG. 1A, the first water guiding portion group 4 and the second water guiding portion group 5 located on either side of the imaginary line L3 have a common structure to the first water guiding portion group 4 and the second water guiding portion group 5 located on either side of the imaginary line L1. The first water guiding portion group 4 and the second water guiding portion group 5 located on either side of the imaginary line L3 will be described in detail below.

[0022] The first water guiding section group 4 is composed of a plurality of first water guiding sections 3a, and the second water guiding section group 5 is composed of a plurality of second water guiding sections 3b. The second water guiding section 3b has a shape obtained by rotating the first water guiding section 3a.

[0023] That is, the first water guide section 3a and the second water guide section 3b have the same shape. In this embodiment, when viewed in a direction facing the reference plane F defined on the surface of the base material 2 (hereinafter referred to as a front view), the shape of the first water guide section 3a rotated 120 degrees clockwise around a rotation axis that passes through the center of the first water guide section 3a (the center point of a center line 62 described later) and is perpendicular to the reference plane F is the second water guide section 3b. In this embodiment, when viewed from the front, the shape of the first water guide section 3a rotated 180 degrees around the boundary line (virtual straight line L3) between the first water guide section group 4 and the second water guide section group 5 on the reference plane F is the second water guide section 3b. The rotation of the first water guide section 3a is not limited to rotation around a rotation axis perpendicular to the reference plane F, but may be rotation around a rotation axis on the reference plane F or rotation around another rotation axis. The unit shapes 6 of the same shape constituting the first water guide section 3a and the second water guide section 3b will be described in detail below.

[0024] FIG. 2A shows a unit shape 6 (i.e., the first water guide portion 3a) constituting the first water guide portion group 4. The unit shape 6 has a recess 7 recessed from a reference plane F defined on the surface 20 of the substrate 2. In this embodiment, the "defined reference plane F" is a planar imaginary plane perpendicular to the front-rear direction, and is located on the same plane as the plane constituting the region S1 described below. The unit shape 6 includes a first contour line 60 that is curved and convex on one side on the reference plane F, a second contour line 61 that is curved and convex on the opposite side of the first contour line 60 on the reference plane F like the first contour line 60 and is connected to both ends of the first contour line 60, and a linear center line 62 that connects both ends of the first contour line 60 and the second contour line 61 on the reference plane F. The region S1 surrounded by the first contour line 60 and the center line 62 is a plane, and the region S2 surrounded by the second contour line 61 and the center line 62 is a recess 7. The unit shape 6 is a three-dimensional shape in which the shape of the projections and recesses is different between the region S1 and the region S2.

[0025] In this embodiment, the unit shape 6 has a longitudinal direction parallel to the center line 62, a lateral direction perpendicular to the center line 62 and parallel to the plane of region S1, and a thickness direction perpendicular to the longitudinal and lateral directions.

[0026] Each of the first contour line 60 and the second contour line 61 is connected to both ends of the center line 62 at one end and the other end, and is curved so as to be farthest from the center line 62 at a central portion facing the center point of the center line 62. In this embodiment, the first contour line 60 and the second contour line 61 are line symmetric with respect to the center line 62 and point symmetric with respect to the center point of the center line 62.

[0027] 2B, the recess 7 has a first side surface 70 that extends in a plane from the center line 62 to the rear side (rear side), i.e., extends in a direction perpendicular to the reference plane F, and a second side surface 71 that extends in a curved shape from the second contour line 61 to the rear side (rear side) and is connected to the first side surface 70, and a boundary line 700 between the first side surface 70 and the second side surface 71 is curved so as to be convex toward the rear side. In addition, the shape of the recess 7 along the center line 62 gradually becomes deeper from the first contour line 60, is deepest at the center of the recess 7, and gradually becomes shallower until it reaches the first contour line 60.

[0028] As shown in Fig. 1B, in the first water guiding portion group 4, the center line 62 of each of the multiple unit shapes 6 is inclined 30 degrees clockwise with respect to an axis (e.g., virtual line L3) parallel to the short side direction (up-down direction) of the building board 1. As shown in Fig. 1B and Fig. 2A, in the first water guiding portion group 4, multiple rows of unit shape groups are formed, each row being made up of multiple unit shapes 6 arranged so that their center lines 62 are aligned in a straight line. The center lines 62 of each row are parallel to each other.

[0029] In the group of unit shapes in one row, the first contour line 60 of one of two unit shapes 6 adjacent in the longitudinal direction is continuous with the first contour line 60 of the other of the two unit shapes 6 that are adjacent to each other in a portion where they are continuous with each other, so as to draw a smooth curve that is convex toward the second contour line 61 side. In addition, in the group of unit shapes in one row, the second contour line 61 of one of two unit shapes 6 adjacent in the longitudinal direction is continuous with the second contour line 61 of the other of the two unit shapes 6 that are adjacent to each other in a portion where they are continuous with each other, so as to draw a smooth curve that is convex toward the first contour line 60 side. In the group of unit shapes in one row, the center line 62 of one of two unit shapes 6 adjacent in the longitudinal direction is continuous with the center line 62 of the other of the two unit shapes 6 that are adjacent to each other in the longitudinal direction. In each row of the group of unit shapes, the first contour line 60, the second contour line 61, and the center line 62 have the above-mentioned relationship.

[0030] In two adjacent rows of unit shape groups, the second contour line 61 of the unit shape 6 in one row and the first contour line 60 of the unit shape 6 in the other row are arranged so that they contact each other at their centers. An imaginary line connecting the center points of the center lines 62 of the unit shapes 6 in each row that contact each other is perpendicular to the center lines 62 of the unit shapes 6 in each row.

[0031] The first water guiding portion group 4 further includes an intermediate unit shape 8 formed in a region S3 surrounded by four unit shapes 6 adjacent to each other in the longitudinal and lateral directions of the unit shapes 6.

[0032] As shown in FIG. 2A, the intermediate unit shape 8 includes a first contour line 80 that is curved and convex on one side on the reference plane F, a second contour line 81 that is curved and convex on the opposite side of the first contour line 80 on the reference plane F like the first contour line 80, and is connected to both ends of the first contour line 80, and a linear center line 82 that connects both ends of the first contour line 80 and the second contour line 81 on the reference plane F. As shown in FIG. 2C, the region S30 surrounded by the first contour line 80 and the center line 82 is a plane, and the region S31 surrounded by the second contour line 81 and the center line 82 is a recess 9. In other words, the intermediate unit shape 8 has a recess 9 that is recessed from the reference plane F defined on the surface 20 of the base material 2. The intermediate unit shape 8 is a three-dimensional shape in which the modes of the recesses and protrusions are different between the region S30 and the region S31. The plane that constitutes the region S30 is located on the same plane as the reference plane F.

[0033] Each of the first contour line 80 and the second contour line 81 is connected to both ends of the center line 82 at one end and the other end, and is curved so as to be farthest from the center line 82 at a central portion facing the center point of the center line 82. In this embodiment, the first contour line 80 and the second contour line 81 are line symmetric with respect to the center line 82 and point symmetric with respect to the center point of the center line 82.

[0034] The first contour line 80 of the intermediate unit shape 8 is composed of half of the second contour line 61 of one of two unit shapes 6 aligned in the longitudinal direction and half of the second contour line 61 of the other of the two unit shapes 6 aligned in the longitudinal direction. The second contour line 81 of the intermediate unit shape 8 is composed of half of the first contour line 60 of one of two unit shapes 6 aligned in the longitudinal direction of another row and half of the first contour line 60 of the other of the two unit shapes 6 aligned in the longitudinal direction. Therefore, the contour lines 80, 81 of the intermediate unit shape 8 are slightly different in shape from the contour lines 60, 61 of the unit shapes 6.

[0035] As shown in FIG. 2C , the recess 9 has a first side 90 that extends in a flat manner from the center line 82 to the back side (rear side), i.e., in a direction perpendicular to the reference plane F, and a second side 91 that extends in a curved manner from the second contour line 81 to the back side (rear side) and is connected to the first side 90, and the boundary line 900 between the first side 90 and the second side 91 is curved so as to be convex toward the back side.

[0036] As shown in FIG. 1B, in the first water guiding portion group 4, a plurality of rows of intermediate unit shape groups are formed, each row being made up of a plurality of intermediate unit shapes 8 arranged such that center lines 82 are aligned in a straight line.

[0037] 2A , in two adjacent rows of intermediate unit shape groups, the second contour line 81 of the intermediate unit shape 8 in one row and the first contour line 80 of the intermediate unit shape 8 in the other row are arranged so that they contact each other at their centers. An imaginary line connecting the center points of the center lines 82 of the intermediate unit shapes 8 in each of the adjacent rows is perpendicular to the center lines 82 of the intermediate unit shapes 8 in each row.

[0038] In one row of intermediate unit shape groups, of two intermediate unit shapes 8 adjacent in the longitudinal direction, the first contour line 80 of one and the first contour line 80 of the other are continuous to each other so as to draw a smooth curve that is convex toward the second contour line 81 at the portion where they are continuous with each other. Also, in one row of intermediate unit shape groups, of two intermediate unit shapes 8 adjacent in the longitudinal direction, the second contour line 81 of one and the second contour line 81 of the other are continuous to each other so as to draw a smooth curve that is convex toward the first contour line 80 at the portion where they are continuous with each other. Also, in one row of intermediate unit shape groups, of two intermediate unit shapes 8 adjacent in the longitudinal direction, the center line 82 of one and the center line 82 of the other are continuous in a straight line. In each row of intermediate unit shape groups, the first contour line 80, the second contour line 81, and the center line 82 have the above-mentioned relationship.

[0039] As shown in Figure 1B, in the first water guide portion group 4, the center line 82 of the intermediate unit shape 8 of each row of the intermediate unit shape group is inclined 30 degrees clockwise with respect to an axis (e.g., virtual straight line L3) parallel to the short direction (up-down direction) of the building board 1, similar to the unit shape 6.

[0040] The center line 82 of the intermediate unit shape group is located midway between the center lines 62 of the unit shape groups of two adjacent rows, and is parallel to the center lines 62 of the unit shape groups of each row. Note that at the boundary between the first water guiding portion group 4 and the second water guiding portion group 5, and at the top and bottom ends and the right end of the substrate 2, the intermediate unit shape 8 may not be surrounded by four unit shapes 6.

[0041] 3A shows an enlarged view of the second water guiding part group 5. The second water guiding part group 5 has a plurality of unit shapes 6 and a plurality of intermediate unit shapes 8 in the same relative positional relationship as the first water guiding part group 4.

[0042] As shown in Figure 1B, in the second water guide portion group 5, each of the multiple unit shapes 6 and multiple intermediate unit shapes 8 has its center line 62, 82 inclined 30 degrees counterclockwise with respect to an axis (e.g., a virtual straight line L3) parallel to the short side direction (up-down direction) of the building board 1.

[0043] In this embodiment, the second water guiding portion group 5 is arranged symmetrically with the first water guiding portion group 4, centered on the boundary line (virtual straight line L3) with the first water guiding portion group 4 on the reference plane F. On the boundary line (virtual straight line L3) between the water guiding portion groups 4, 5, center lines 62 of the unit shapes 6 of the water guiding portion groups 4, 5 intersect, and center lines 82 of the intermediate unit shapes 8 of the water guiding portion groups 4, 5 also intersect.

[0044] In the building board 1 of the present embodiment described above, the side surfaces 70, 71 (see FIG. 2B) of the recesses 7 of each unit shape 6 in the first water guiding portion group 4 form a guide surface 30 that slopes downward toward the imaginary straight line L3 (i.e., the specified portion P). Also, the side surfaces 90, 91 (see FIG. 2C) of the recesses 9 of each intermediate unit shape 8 in the first water guiding portion group 4 form a guide surface 30 that slopes downward toward the imaginary straight line L3 (i.e., the specified portion P).

[0045] In the building board 1 of this embodiment, the side surfaces 70, 71 (see FIG. 3B) of the recesses 7 of each unit shape 6 in the second water guide group 5 form a guide surface 30 that slopes downward toward the imaginary straight line L3 (i.e., the specified portion P). In addition, the side surfaces 90, 91 (see FIG. 3C) of the recesses 9 of each intermediate unit shape 8 in the second water guide group 5 form a guide surface 30 that slopes downward toward the imaginary straight line L3 (i.e., the specified portion P).

[0046] Therefore, in the building board 1 of this embodiment, in the first water guiding portion group 4 and the second water guiding portion group 5 on either side of the virtual straight line L3, the side surfaces 70, 71, 90, 91 of the recesses 7, 9 of each unit shape 6, 8 can guide rainwater that flows into the recesses 7, 9 in a direction toward the virtual straight line L3.

[0047] In addition, in the building board 1 of this embodiment, in the first water guide portion group 4 and the second water guide portion group 5 on either side of the virtual straight line L1, the side surfaces 70, 71, 90, 91 of the recesses 7, 9 of each unit shape 6, 8 can similarly guide rainwater flowing into the recesses 7, 9 in a direction toward the virtual straight line L1.

[0048] In addition, in the building board 1 of this embodiment, in the first water guide portion group 4 and the second water guide portion group 5 on either side of the virtual straight line L2, the side surfaces 70, 71, 90, 91 of the recesses 7, 9 of each unit shape 6, 8 can guide rainwater that flows into the recesses 7, 9 in a direction away from the virtual straight line L2.

[0049] As a result, in the building board 1 of this embodiment, rainwater received on the surface 20 of the base material 2 can be guided to a predetermined portion P (the virtual straight line L1 or the virtual straight line L3) by the multiple water guide parts 3. Therefore, in the building board 1 of this embodiment, the location where the rainwater is drained can be appropriately set according to the surrounding environment, etc.

[0050] Furthermore, in the building board 1 of this embodiment, since the unit shapes 6 constituting the first water guiding portion group 4 and the second water guiding portion group 5 are the same shape, the first water guiding portion group 4 and the second water guiding portion group 5 can be easily formed on the surface 20 of the base material 2.

[0051] 2-2. Construction structure of building boards Next, a detailed description will be given of the roof structure 10 shown in Fig. 4. This roof structure 10 is an example of a construction structure using the building board of this embodiment.

[0052] The roof structure 10 is a roof structure in which the above-mentioned building boards 1 are arranged in a staggered pattern. In the roof structure 10, a plurality of building boards 1 are arranged butted against each other in the left-right direction and also butted against each other in the up-down direction. In this embodiment, adjacent building boards 1 in the up-down direction are arranged with a left-right shift of half the left-right length of the building boards 1.

[0053] In the roof structure 10 of this embodiment, the upper building board 1a has a predetermined portion P (imaginary straight lines L1, L3) at a position shifted in the left-right direction from the left-right abutment portion Q1 of the lower building board 1b.

[0054] Therefore, in this roof structure 10, rainwater guided to the imaginary straight lines L1, L3 of the upper building board 1a can be prevented from flowing into the left-right abutment portions Q1 of the lower building board 1b.

[0055] In addition, in each building board 1, rainwater is guided to the imaginary straight lines L1, L3, so that rainwater can be prevented from flowing into the abutment parts Q1 or Q2 with other building boards 1 adjacent in the left-right direction.

[0056] In addition, in the roof structure 10 of this embodiment, the virtual straight line L3 of the upper building board 1a and the virtual straight line L1 of the lower building board 1b are aligned in the vertical direction (more specifically, the eaves-ridge direction), and the virtual straight line L1 of the upper building board 1a and the virtual straight line L3 of the lower building board 1b are aligned in the vertical direction.

[0057] Therefore, in the roof structure 10 of this embodiment, rainwater is guided toward the virtual straight lines L1, L3 of the upper building board 1a and drained onto the surface of the lower building board 1b, and can flow smoothly along the virtual straight lines L1, L3 of the lower building board 1b.

[0058] 3. Variations Next, a description will be given of modified examples of the building board 1 of the above-mentioned embodiment and the construction structure of the building board 1. The modified examples shown below can be appropriately combined.

[0059] The inclination of the unit shapes 6 and intermediate unit shapes 8 in each of the first water guiding portion group 4 and the second water guiding portion group 5 with respect to an axis (e.g., virtual straight lines L1, L2, L3) parallel to the short-side direction (up-down direction) of the building board 1 is not limited to the angle shown in Fig. 1B and can be changed as appropriate. Note that the inclination of the unit shapes 6, 8 of the first water guiding portion group 4 and the inclination of the unit shapes 6, 8 of the second water guiding portion group 5 do not have to correspond to each other.

[0060] Furthermore, the water guide portion 3 only needs to have a three-dimensional shape and a guide surface 30 that slopes downward toward a predetermined portion P of the surface 20 of the base material 2, and the shape of the water guide portion 3 is not limited to the shape of the unit shape 6 shown in Figures 2A and B.

[0061] For example, the first water guiding portion 3a and the second water guiding portion 3b may have different shapes.

[0062] The first water guiding sections 3a do not have to have the same three-dimensional shape, and may have a plurality of different three-dimensional shapes. The same applies to the second water guiding sections 3b.

[0063] Furthermore, the predetermined portion P of the building board 1 where water is guided is not limited to the virtual straight lines L1, L3, and may be another portion. For example, the predetermined portion P may be both the left and right ends of the surface 20 of the base material 2, or may be located in another portion of the surface 20 of the base material 2. Note that the building board 1 may have the predetermined portion P only in one place on the surface 20 of the base material 2.

[0064] In addition, in the construction structure of the building board 1, it is sufficient that a predetermined portion P (virtual straight lines L1, L3) of the upper building board 1a is positioned so as to be shifted left and right relative to the abutment portion Q1 of the lower building board 1b, and it may also be positioned so as to be shifted left and right relative to the virtual straight lines L1, L3 of the lower building board 1b.

[0065] Furthermore, the construction structure of the building boards 1 is not limited to a structure in which the building boards 1 are arranged in a staggered pattern, but the left-right abutment portion Q2 of the upper building board 1a and the left-right abutment portion Q1 of the lower building board 1b may be positioned side-by-side in the vertical direction.

[0066] 2A, B, etc. For example, the center line 62 of the unit shape 6 is not limited to a straight line, but may be a curved shape that is convex from the reference plane F to the front side, and the region S1 surrounded by the first contour line 60 and the center line 62 may be a convex portion. In this case, the region S2 surrounded by the second contour line 61 and the center line 62 is not limited to a recess 7, but may be a flat surface. In this case, the convex region S1 of the unit shape 6 can also guide rainwater.

[0067] The two contour lines 60, 61 of the unit shape 6 may be arc-shaped. The two contour lines 60, 61 of the unit shape 6 do not have to be symmetrical about the center line 62. The two contour lines 60, 61 are not limited to be curved, and may be straight lines that are bent at least once along the way.

[0068] Furthermore, the inner surface of recess 7 of unit shape 6 does not have to have a planar portion (first side surface 70), and the entire inner surface may be concave. Furthermore, recess 7 of unit shape 6 may have a bottom surface perpendicular to the thickness direction. The same applies to recess 9 of intermediate unit shape 8. Note that intermediate unit shape 8 is not limited to a three-dimensional shape having projections and recesses, and may be entirely formed of a flat surface.

[0069] Furthermore, the plurality of water guide portions 3 are not limited to being provided on the entire surface 20 of the substrate 2, but may be provided on only a part of the surface.

[0070] Furthermore, the building board 1 is not limited to being used as a roofing material, and may be used as an exterior wall material or an interior wall material. When the building board 1 is a wall board, the construction structure in which the building board 1 is installed is a wall structure.

[0071] (Embodiment 2) Next, a description will be given of the building board 1 of embodiment 2 shown in Fig. 5 and Fig. 6A to C. In the following, regarding the building board 1 of embodiment 2, the same components as those of the building board 1 of embodiment 1 will be denoted by the same reference numerals in the drawings and detailed description will be omitted, and components different from those of the building board 1 of embodiment 1 will be described in detail.

[0072] The building board 1 of this embodiment has a shape in which one corner of the lower end of a rectangular board has been cut off. The lower surface of the building board 1 is composed of a flat surface portion parallel to the left-right direction and an inclined surface portion located on the left side of the flat surface portion and inclined so that the closer to the flat surface portion the lower the portion is. In the building board 1 of this embodiment, a plurality of water guide portions 3 are arranged in the same direction over the entire surface 20 of the base material 2.

[0073] The multiple water guide portions 3 have multiple unit shapes 6 and multiple intermediate unit shapes 8 in the same relative positional relationship as the first water guide portion group 4 of the building board 1 of the first embodiment.

[0074] Each of the multiple unit shapes 6 has a center line 62 that is inclined 35 degrees counterclockwise with respect to the longitudinal direction (left-right direction) of the building board 1. Each of the multiple unit shapes 6 has a first contour line 60 located above the center line 62, and a second contour line 61 located below the center line 62.

[0075] Similarly, each of the multiple intermediate unit shapes 8 has a center line 82 that is inclined 35 degrees counterclockwise with respect to the longitudinal direction (left-right direction) of the building board 1. Each of the multiple intermediate unit shapes 8 has a first contour line 80 located above the center line 82, and a second contour line 81 located below the center line 82.

[0076] In the building board 1 of this embodiment described above, the side surfaces 70, 71 (see FIG. 6B) of the recess 7 of each unit shape 6 form a guide surface 30 that slopes downward toward the left end (i.e., the specified portion P) of the building board 1. In addition, the side surfaces 90, 91 (see FIG. 6C) of the recess 9 of each intermediate unit shape 8 form a guide surface 30 that slopes downward toward the left end (i.e., the specified portion P) of the building board 1.

[0077] Therefore, in the building board 1 of this embodiment, the side surfaces 70, 71, 90, 91 of the recesses 7, 9 of each unit shape 6, 8 can guide rainwater that has flowed into the recesses 7, 9 diagonally downward toward the left end of the building board 1. In other words, in the building board 1 of this embodiment, the rainwater that has flowed into the recesses 7, 9 can be guided in a direction away from the right end of the building board 1.

[0078] Next, the construction of the building board 1 shown in FIG. 7 will be described.

[0079] The construction structure of the building board 1 shown in Fig. 7 is an armor-clad construction structure 11. The armor-clad construction structure 11 includes a plurality of building boards 1 arranged in a staggered and armor-clad pattern. The armor-clad construction structure 11 constitutes the roof and walls of a building. Each of the plurality of building boards 1 is fixed to the base by a fastener such as a nail.

[0080] In the armor construction structure 11, multiple building boards 1 are arranged side-to-side in the left-right direction and are arranged vertically while partially overlapping. Vertically adjacent building boards 1 are offset left-right, and are arranged in a so-called staggered pattern. In this embodiment, vertically adjacent building boards 1 are offset by half the left-right length of the building boards 1.

[0081] The building boards 1 adjacent in the vertical direction are arranged in a so-called armor-like manner, with the lower part of the upper building board 1a located in front of the upper part of the lower building board 1b. In this embodiment, the lower half parts of the two upper building boards 1a arranged side by side are located in front of the upper half part of the lower building board 1b. Each building board 1 is fixed to the base in an inclined position so that the lower part is located closer to the front.

[0082] In the armor construction structure 11, the upper building board 1a has a predetermined portion P (that is, the left end of the building board 1a) at a position shifted in the left-right direction relative to the left-right abutment portion Q1 of the lower building board 1b.

[0083] Therefore, in this armor-clad construction structure 11, rainwater guided diagonally downward toward the left end of the upper building board 1a can be prevented from flowing into the left-right abutment portion Q1 of the lower building board 1b.

[0084] In addition, in this armor-covered construction structure 11, the rainwater can be made to flow diagonally downward to the left instead of straight down by the multiple water guide parts 3 (unit shapes 6, 8) on the surface of each building board 1, so that the rainwater that reaches the flat part of the lower surface of each building board 1 tends to run sideways to the left along the flat part (see the dashed arrow in FIG. 7). In addition, the rainwater that reaches the inclined surface part of the lower surface of each building board 1 tends to flow diagonally downward to the right along the inclined surface part, and tends to flow to the opposite side of the butt parts Q1, Q2. The rainwater that runs sideways to the left along the lower surface of each building board 1 and the rainwater that flows diagonally downward to the right join together at the corner formed by the flat part and the inclined surface part of the lower surface of each building board 1, and flow down. The rainwater that flows down from the corner of the lower surface of the upper building board 1a is guided by the multiple water guide parts 3 when it flows down the surface of the lower building board 1b, and is dispersed in multiple directions instead of just one direction, so that rain streaks are less likely to occur on the surface of each building board 1.

[0085] In addition, in this armor-clad construction structure 1, the length of the exposed portion of the left-right abutment parts Q1, Q2 of each building board 1 is short because the lower corners of each building board 1 are cut off and the upper half is covered by the building board 1 of the next higher level. Therefore, little rainwater accumulates at the abutment parts Q1, Q2, and the amount of water that seeps into the back side of each building board 1 is also small.

[0086] In addition, for the building board 1 and the construction structure of the building board 1 of the second embodiment, modified examples of the building board 1 and the construction structure of the building board 1 of the first embodiment can be appropriately adopted.

[0087] (Embodiment 3) Next, a description will be given of the building board 1 of embodiment 3 shown in Fig. 8 and Fig. 9A to C. In the following, regarding the building board 1 of embodiment 3, the same components as those of the building board 1 of embodiment 1 are given the same reference numerals in the drawings and detailed description will be omitted, and components different from those of the building board 1 of embodiment 1 will be described in detail.

[0088] The building board 1 of this embodiment has a shape in which two corners of the lower end of a rectangular board are cut off. The lower surface of the building board 1 is composed of a flat surface located in the center in the left-right direction and parallel to the left-right direction, and two inclined surface portions located on the left and right of the flat surface and inclined so that the closer to the flat surface portion, the lower the portion.

[0089] In the building board 1 of this embodiment, a plurality of water guide portions 3 are arranged over the entire surface 20 of the base material 2 in the same direction.

[0090] The multiple water guide portions 3 have multiple unit shapes 6 and multiple intermediate unit shapes 8 in the same relative positional relationship as the first water guide portion group 4 of the building board 1 of the first embodiment.

[0091] Each of the multiple unit shapes 6 has a center line 62 parallel to the longitudinal direction (left-right direction) of the building board 1. Each of the multiple unit shapes 6 has a first contour line 60 located above the center line 62 and a second contour line 60 located below the center line 62.

[0092] Similarly, each of the multiple intermediate unit shapes 8 has a center line 82 parallel to the longitudinal direction (left-right direction) of the building board 1. Each of the multiple intermediate unit shapes 8 has a first contour line 80 located above the center line 82, and a second contour line 80 located below the center line 82.

[0093] In the building board 1 of this embodiment described above, the side surface 71 (see Figs. 9A and 9B) of the recess 7 of each unit shape 6 forms a guide surface 30 that slopes downward toward the center in the left-right direction of the recess 7 (i.e., the specified part P). Also, the side surface 91 (see Figs. 9A and 9C) of the recess 9 of each intermediate unit shape 8 forms a guide surface 30 that slopes downward toward the center in the left-right direction of the recess 9 (i.e., the specified part P).

[0094] Therefore, in the building board 1 of this embodiment, the side surfaces 71, 91 of the recesses 7, 9 of each unit shape 6, 8 can guide rainwater flowing into the recesses 7, 9 diagonally downward toward the center of the recesses 7, 9 in the left-right direction.

[0095] Next, the construction of the building board 1 shown in FIG. 10 will be described.

[0096] The construction structure of the building board 1 shown in Fig. 10 is an armor-clad construction structure 11. The armor-clad construction structure 11 includes a plurality of building boards 1 arranged in a staggered and armor-clad pattern. The armor-clad construction structure 11 constitutes the roof and walls of a building. Each of the plurality of building boards 1 is fixed to the base by a fastener such as a nail.

[0097] In the armor construction structure 11, multiple building boards 1 are arranged side-to-side in the left-right direction and are arranged vertically while partially overlapping. Vertically adjacent building boards 1 are offset left-right, and are arranged in a so-called staggered pattern. In this embodiment, vertically adjacent building boards 1 are offset by half the left-right length of the building boards 1.

[0098] The building boards 1 adjacent in the vertical direction are arranged in a so-called armor-like manner, with the lower part of the upper building board 1a located in front of the upper part of the lower building board 1b. The upper building board 1a is arranged so that the flat part of the central part in the left-right direction of the lower surface is located higher than the lower ends of the left and right edges of the lower building board 1b. Each building board 1 is fixed to the base in an inclined position so that the lower part is located further forward.

[0099] In the armor-clad construction structure 11, rainwater received on the surface of each building board 1 can be guided by each of the multiple unit shapes 6, 8 so that it gathers in the center of the left-right direction of each unit shape 6, 8 and flows straight down.

[0100] Therefore, in this armor-clad construction structure 11, rainwater received on the surface of the upper building board 1a can be prevented from flowing in a concentrated manner into the left-right abutment portions Q1 of the lower building board 1b.

[0101] Furthermore, in this armor-clad construction structure 11, rainwater flowing along the slope of the underside of the upper building board 1a (see dashed arrow in Figure 10) tends to concentrate at the abutment portion Q1 of the lower building board 1b, but since the exposed length of the abutment portion Q1 of the lower building board 1b is short, little rainwater penetrates to the back side of the lower building board 1b.

[0102] In addition, for the building board 1 and the construction structure of the building board 1 of the third embodiment, modified examples of the building board 1 and the construction structure of the building board 1 of the first embodiment can be appropriately adopted.

[0103] 4. Summary As is clear from the above-described first to third embodiments and their modifications, the building board 1 of the first aspect has the following configuration.

[0104] That is, the building board 1 of the first embodiment has a plurality of water guide portions 3 having a three-dimensional shape provided on the surface 20 of the base material 2. Each of the plurality of water guide portions 3 has a guide surface 30 that slopes downward toward a predetermined portion P of the surface 20.

[0105] In the first embodiment of the building board 1 having the above-mentioned configuration, the guide surface 30 of the multiple water guide portions 3 provided on the surface 20 of the base material 2 can guide rainwater running along the surface 20 to a predetermined portion P of the surface 20.

[0106] As is clear from the above-mentioned first embodiment and its modified examples, the building board 1 of the second aspect additionally comprises the following configuration in addition to the configuration of the first aspect.

[0107] That is, in the building board 1 of the second embodiment, the predetermined portion P is located on the surface 20 of the base material 2 except for the left and right ends.

[0108] In the building board 1 of the second embodiment having the above-mentioned configuration, rainwater can be prevented from being guided to both the left and right ends of the building board 1.

[0109] As is clear from the above-mentioned first embodiment and its modified examples, the building board 1 of the third aspect additionally comprises the following configuration in addition to the configuration of the first or second aspect.

[0110] That is, in the building board 1 of the third embodiment, the multiple water guide portions 3 include multiple first water guide portions 3a located on the right side of a predetermined portion P of the surface 20 of the base material 2, and multiple second water guide portions 3b located on the left side of the predetermined portion P of the surface 20 of the base material 2. The second water guide portion 3b has a rotated shape of the first water guide portion 3a.

[0111] In the building board 1 of the third embodiment having the above configuration, rainwater can be guided to a predetermined portion P, which is the boundary portion, by each of the first water guide portion group 4 and the second water guide portion group 5. Moreover, in the building board 1 of the third embodiment, the first water guide portion 3a and the second water guide portion 3b have the same shape, so that the first water guide portion group 4 and the second water guide portion group 5 can be easily formed.

[0112] As is clear from the above-mentioned first embodiment and its modified examples, the building board 1 of the fourth aspect additionally comprises the following configuration in addition to the configuration of the third aspect.

[0113] That is, in the building board 1 of the fourth embodiment, the first water guide portion 3a has a recess 7 recessed from a reference plane F defined on the surface 20 of the base material 2, and the inner surface of the recess 7 has a concave surface, which constitutes the guide surface 30.

[0114] In the building board 1 of the fourth embodiment having the above configuration, the guide surface 30 can be formed by the concave surface on the inner surface of the recess 7, and rainwater that has entered the recess 7 can be easily guided toward the predetermined portion P.

[0115] As is clear from the above-mentioned first and second embodiments and their modified examples, the construction structure of the building board 1 according to the fifth aspect has the following configuration.

[0116] In other words, the construction structure of the building board 1 of the fifth embodiment is a structure in which building boards 1 of any one of the first to fourth embodiments are arranged in a staggered pattern, and the upper building board 1a has a predetermined portion P at a position shifted left-right relative to the left-right abutment portion Q1 of the lower building board 1b.

[0117] In the construction structure of the fifth embodiment of the building board 1 having the above-mentioned configuration, rainwater guided by the multiple water guide portions 3 of the upper building board 1a can be prevented from flowing into the left-right abutment portions Q1 of the lower building board 1b.

[0118] The present invention has been described above based on the embodiment shown in the attached drawings, but the present invention is not limited to the above embodiment, and appropriate design changes are possible within the intended scope of the present invention. [Explanation of symbols]

[0119] 1 Architectural board 1a Upper building board 1b Lower building board 2 Base material 20 surface 3 Water guide part 30 Guidance surface 3a First water guide section 3b Second water guide section 7 Recess 10 Roof structure F reference plane P Prescribed part Q1 Attachment part

Claims

1. A plurality of rows of water guide portions each having a three-dimensional shape and arranged on a straight line inclined with respect to the left and right edges of the base material are formed on a surface of the base material, A building board characterized in that each of the multiple water guide portions has a recess recessed from the surface, and the inner surface of the recess includes a guide surface inclined so as to guide water in the direction in which the rows of the multiple water guide portions are arranged on the surface.

2. The building board described in claim 1, characterized in that each contour line of the multiple water guide portions includes a first contour line that is curved and bulges to one side on the surface, and a second contour line that is curved and bulges to the opposite side of the first contour line on the surface.

3. A center line of each of the plurality of water guiding portions is a line connecting both ends of the first contour line and the second contour line, The building board according to claim 2 , wherein the recess is formed in an area surrounded by the center line and the first contour line of a corresponding one of the plurality of water guide portions.

4. The plurality of water guide sections are A plurality of first water guide portions located on the right side of a virtual line dividing the surface of the base material into left and right; A plurality of second water guiding portions located on the surface of the base material to the left of the virtual straight line, The building board according to any one of claims 1 to 3, wherein the second water guide portion has a shape obtained by rotating the first water guide portion.

5. A structure in which the building boards according to claim 4 are arranged in a staggered pattern, A construction structure for building boards, characterized in that the imaginary straight line is located at a position of the upper building board that is shifted left and right relative to the left and right abutment portion of the lower building board.

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