JP2017137662A - Building board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a building board capable of suppressing breaking in constructor's handling while keeping a surface three-dimensional.SOLUTION: A building board has a grooved joint formed extending in at least one of lengthwise and breadthwise directions of a surface 21 of a substrate 2 in a rectangular shape in front view. The joint is provided with a projection 5 which projects from a bottom part 34, and the projection 5 is a projection streak extending intermittently in the direction in which the joint extends, and also formed closer at a lengthwise center part of the substrate 2 than at other parts. The joint is a box joint having a bottom face 311 forming the bottom part 34 and a pair of side faces 312 extending toward a top surface side from both breadthwise ends of the bottom face 311.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a building board.

  Conventionally, an outer wall surface material in which the horizontal direction is the longitudinal direction and the vertical direction is the short direction is known (for example, Patent Document 1). Further, on the surface of the outer wall surface material, in order to give a three-dimensional effect to the surface of the outer wall surface material, groove-like pseudo joints recessed in the back surface side are formed in the vertical and horizontal directions.

JP 2008-127960 A

  The outer wall surface material is carried by having a plurality of installers at both ends in the longitudinal direction, or having a central portion in the longitudinal direction at the construction site.

  When both ends of the outer wall surface material are held by a plurality of contractors, the outer wall surface material is caused to bend more largely than the other portions due to its own weight, particularly in the central portion in the longitudinal direction of the outer wall surface material. In addition, when the contractor has a central portion in the longitudinal direction of the outer wall surface material, for example, when the contractor changes direction so that both ends in the longitudinal direction of the outer wall surface material swing, Stress concentration occurs in the central portion in the longitudinal direction of the material.

  At this time, since the thickness of the outer wall surface material is thin at the portion where the pseudo joint is formed, the stress is concentrated, and in some cases, the outer wall material may be broken.

  The object of the present invention invented in view of the above-mentioned conventional problems is to provide a building board having a flexural strength while maintaining a three-dimensional surface.

  In order to achieve the above object, a building board according to the present invention has the following configuration.

  The building board is characterized in that a groove-like joint extending in at least one of the longitudinal direction and the short-side direction of the substrate surface having a rectangular shape in front view is formed, and the joint is provided with a protrusion protruding from the bottom. To do.

  Moreover, it is preferable that the said protrusion is comprised by the protrusion extended intermittently in the direction where the said joint extends.

  In addition, it is preferable that the protrusions are formed more densely in the central portion in the longitudinal direction of the substrate than in other portions.

  Moreover, it is preferable that the said joint is a box joint which has the bottom face which forms a bottom part, and a pair of side surface extended to the surface side from the width direction both ends of the said bottom face.

  Moreover, it is preferable that the width | variety of the said protrusion is 1/3 or more of the width | variety of the said bottom face.

  In the building board of the present invention, by forming the short protrusion on the vertical joint, a shadow is formed on the vertical joint to maintain the three-dimensional surface, and the building board may break along the vertical joint. It is suppressed. Furthermore, in the building board of this invention, a longitudinal projection is formed in a horizontal joint, and it can make it difficult to bend a building board.

FIG. 1 is a front view of a building board according to an embodiment of the present invention. 2 is a cross-sectional view taken along line AA of FIG. FIG. 3A is a cross-sectional view showing another example of the short protrusion. FIG. 3B is a cross-sectional view showing another example of the short protrusion. FIG. 3C is a cross-sectional view showing another example of the short protrusion. FIG. 4A is an enlarged view of the vicinity of the vertical joint in Modification 1 of the building board same as above. FIG. 4B is an enlarged view illustrating the flow of water in the vertical joint. FIG. 5A is an enlarged view of the vicinity of the vertical joint in Modification 2 of the building board same as above. 5B is a cross-sectional view taken along line BB in FIG. 5A. 5C is a cross-sectional view taken along the line CC of FIG. 5A. FIG. 5D is an enlarged view illustrating the flow of water in the vertical joint. FIG. 6: is a front view of the modification 3 of a building board same as the above. FIG. 7A is a front view of a building board according to an embodiment of the present invention. FIG. 7B is a cross-sectional view taken along line DD of FIG. 7A. FIG. 8A is a front view of Modification 4 of the building board of the above. FIG. 8B is a front view of a modified example of the building board. FIG. 9 is a front view showing an example of a building board according to the present invention.

  One embodiment of the present invention described below particularly relates to a building board having a groove-like joint formed on the surface.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

(Description of configuration)
The building board 1 of the present embodiment is a ceramic siding material for horizontal stretching. The building board 1 is formed of a cementitious material such as mortar and concrete.

  In the building board 1 of this embodiment, as shown in FIG. 1, the up-down direction and the left-right direction are defined on the basis of the state where the construction person viewed the building board 1 from the front. Moreover, the front side of the building board 1 is defined as the front direction, and the back side is defined as the rear direction.

  In the building board 1, joints 3 and protrusions 4 are formed on the substrate 2 as shown in FIG. 1.

  The substrate 2 has a rectangular shape when viewed from the front. The board | substrate 2 makes a left-right direction a longitudinal direction, and makes an up-down direction a transversal direction. Moreover, the board | substrate 2 has thickness in the front-back direction.

  As shown in FIG. 1, the joint 3 is formed on the surface 21 of the substrate 2 so as to be recessed backward. The joint 3 is a groove-shaped joint formed on the surface 21 of the substrate 2. The joint 3 of the present embodiment is a box joint. Here, the box joint is a joint provided with a bottom surface forming a bottom portion and a pair of side surfaces extending forward from both widthwise ends of the bottom surface of the joint formed on the substrate. Here, the bottom portion is a portion located on the back side of the center portion in the depth direction of the joint.

  The convex portion 4 is a portion defined by the joint 3 on the surface 21 of the substrate 2. A plurality of the convex portions 4 are formed on the surface 21 and are adjacent to each other via the joint 3. The plurality of convex portions 4 are arranged in a line in the left-right direction. Moreover, the convex part 4 becomes a rectangular shape seeing from the front.

  In the building board 1 of the present embodiment, the joint 3 extending in the vertical direction (short direction) is referred to as a vertical joint 31, and the joint 3 extending in the left-right direction (longitudinal direction) is referred to as a horizontal joint 33.

  A plurality of vertical joints 31 are formed side by side in the left-right direction of the surface 21. A plurality of vertical joints 31 arranged in the left-right direction are arranged at regular intervals. The vertical joints 31 are arranged with their left and right positions shifted in the vertical direction.

  A plurality of horizontal joints 33 are formed in the vertical direction of the surface 21. The horizontal joint 33 is formed over the entire length of the surface 21 in the left-right direction. The plurality of horizontal joints 33 arranged in the up-down direction are arranged at regular intervals.

  The vertical joint 31 of the present embodiment has a bottom surface 311 and side surfaces 312 as shown in FIG. In the building board 1, the convex portion 4 adjacent to one side (right side in the present embodiment) of the vertical joint 31 in the left-right direction is referred to as a first convex portion 41. In the building board 1, the convex part 4 adjacent to the other side (left side in the present embodiment) of the vertical joint 31 in the left-right direction is referred to as a second convex part 42.

  The bottom surface 311 is located a predetermined distance behind the surface 21 (hereinafter referred to as groove depth F). Here, the bottom 311 is the bottom 34 of the vertical joint 31. As shown in FIG. 1, the bottom surface 311 has a rectangular shape when viewed from the front, and extends long in the vertical direction. The groove depth F is about 3.0 [mm].

  As shown in FIG. 2, the bottom surface 311 has a predetermined width G in the left-right direction. The predetermined width G is about 4.0 [mm]. As shown in FIG. 1, the bottom surface 311 has a joint length S in the vertical direction. The joint length S is about 20.0 [mm]. In addition, it is preferable that this joint length S is 20-455 [mm].

  As shown in FIG. 2, the side surface 312 has a first side surface 312a and a second side surface 312b.

  The first side surface 312 a extends from the right end of the bottom surface 311 to the left end of the front surface of the first convex portion 41. The first side surface 312 a is inclined so as to be positioned on the right side from the right end of the bottom surface 311 to the left end of the front surface of the first convex portion 41. In the vertical joint 31, the inclination angle θ1 of the first side surface 312a with respect to the bottom surface 311 is about 45 °.

  The second side surface 312 b extends from the left end of the bottom surface 311 to the right end of the front surface of the second convex portion 42. The second side surface 312b is inclined so as to be positioned on the left side from the left end of the bottom surface 311 to the right end of the front surface of the second convex portion 42. In the vertical joint 31, the inclination angle θ2 of the second side surface 312b with respect to the bottom surface 311 is about 45 °.

  The vertical joint 31 opens forward. The opening 32 of the vertical joint 31 is a portion from the front end portion of the first side surface 312a to the front end portion of the second side surface 312b. The joint width E of the vertical joint 31 is the length of the opening 32 in the left-right direction. The joint width E of the vertical joint 31 is about 9.0 [mm].

  In the building board 1 of this embodiment, since the horizontal joint 33 has the same shape as the vertical joint 31 described above, the description thereof is omitted here. Thus, in the building board 1, the thickness of the board | substrate 2 becomes thinner than another part in the part in which the joint 3 was formed.

  In the building board 1 of the present embodiment, as shown in FIG. 2, a protrusion 5 (hereinafter referred to as a short protrusion 51) is formed particularly on the bottom surface 311 of the vertical joint 31. The short protrusion 51 reinforces the thickness of the portion of the substrate 2 where the thickness is reduced by the vertical joint 31 while maintaining the three-dimensional effect of the convex portion 4 of the vertical joint 31.

  The short protrusion 51 protrudes forward from the bottom surface 311. The short protrusions 51 are formed of a cementitious material such as mortar and concrete, like the building board 1.

  In the short protrusion 51, the dimension from the right end to the left end at the base end portion is the width L in the left-right direction of the short protrusion 51. In this case, the maximum width in the left-right direction of the short protrusion 51 is the length from the right end portion to the left end portion of the proximal end portion of the short protrusion 51. The width L of the short protrusion 51 is preferably 1/3 to 1/1 of the predetermined width G of the bottom surface 311 of the vertical joint 31. Here, the gap a between the right end portion of the bottom surface 311 and the right end portion of the proximal end portion of the short protrusion 51 is preferably 0 to 1/6 of the predetermined width G. The gap b between the left end portion of the bottom surface 311 and the left end portion of the proximal end portion of the short protrusion 51 is preferably 0 to 1/6 of the predetermined width G.

  In the short projection 51, the maximum length H in the front-rear direction is preferably ¼ to 1/1 of the groove depth F of the vertical joint 31.

  The cross-sectional shape orthogonal to the vertical direction of the short projection 51 of this embodiment is a triangular shape. The width L of the short protrusion 51 is about 3.0 [mm]. The gap a is about 0.5 [mm], and the gap b is about 0.5 [mm]. The maximum length H is about 1.5 [mm].

  The cross-sectional shape of the short protrusion 51 may be, for example, the shape shown in FIGS. 3A, 3B, and 3C.

  As shown in FIG. 3A, the short protrusion 51 may have a cross-sectional shape in which a triangle is distorted. In this case, the maximum width in the left-right direction of the short protrusion 51 is the length from the right end portion to the left end portion of the proximal end portion of the short protrusion 51. The width L and the maximum length H of the short projection 51 are the same as the length described above.

  As shown in FIG. 3B, the short protrusion 51 may have a quadrangular cross-sectional shape. In this case, the maximum width of the short protrusion 51 in the left-right direction is the length of the short protrusion 51 in the left-right direction. The width L and the maximum length H of the short projection 51 are the same as the length described above.

  As shown in FIG. 3C, the short protrusion 51 may be provided on the vertical joint 31 with the center position in the left-right direction shifted from the center position in the left-right direction of the vertical joint 31. The short protrusion 51 has a quadrangular cross-sectional shape, and its width L and maximum length H are the same as those described above.

  In the short projection 51 of FIG. 3C, the left end portion of the base end portion is located at the left end portion of the bottom surface 311 of the vertical joint 31. Therefore, the gap b is about 0 [mm], and the gap a is about 1.0 [mm].

  In the building board 1 of this embodiment, the board | substrate 2 and the short protrusion 51 are integrally formed.

  As a method of integrally forming the substrate 2 and the short protrusion 51, for example, there is a method of forming the building board 1 by a casting method. In this case, the short protrusion 51 is formed integrally with the short protrusion 51 by forming a shape corresponding to the short protrusion 51 in a portion corresponding to the vertical joint 31 of the mold.

  As another method for integrally forming the substrate 2 and the short projection 51, for example, there is a method of forming the building board 1 by an extrusion method or a cutting process. In this case, the board | substrate 2 shape | molded by the extrusion method is cut, and the joint 3 and the short protrusion 51 are formed, and the board | substrate 2 and the short protrusion 51 are formed integrally.

  The configuration of the building board 1 of the present embodiment is not limited to the above-described one aspect, and may be the following aspect.

  The building board 1 can be used not only as an outer wall material but also as an inner wall material, and may be an outer wall panel for vertical tension as well as an outer wall panel for horizontal tension. When the building board 1 is a vertical outer wall panel, a longitudinal protrusion described later is formed on the vertical joint, and a short protrusion is formed on the horizontal joint. Moreover, the manufacturing method of the building board 1 which is a ceramic type | system | group may be not only an extrusion method and a casting method but a papermaking method.

  The plurality of building boards 1 arranged in the vertical direction are connected by phase determination, but may be connected by abutment, and the connection method is not limited. Moreover, although the several building boards 1 located in a line with the left-right direction are connected by abutment, you may connect by the phase determination and the connection method is not limited.

  The joint 3 formed on the building board 1 may be both the vertical joint 31 and the horizontal joint 33, or may be only the vertical joint 31.

  A plurality of vertical joints 31 may be arranged in the left-right direction, but one may be provided. When a plurality of vertical joints 31 are arranged, each may be arranged at a constant interval or may be arranged at a different interval. The plurality of vertical joints 31 are arranged to be staggered in the vertical direction, but may be arranged to be in a straight line in the vertical direction.

  In the vertical joint 31, the joint width E is about 9.0 [mm], and is preferably in the range of about 5.0 to 50 [mm]. The groove depth F is about 3.0 [mm], and is preferably in the range of about 1.5 to 15 [mm]. The predetermined width G is about 4.0 [mm], and is preferably in the range of about 4.0 to 20 [mm]. The joint length S is about 9.0 [mm], and is preferably in the range of about 5.0 to 50 [mm].

  Each of the inclination angle θ1 and the inclination angle θ2 is about 45 °, and is preferably in the range of about 30 to 85 °. In the vertical joint 31, the first side surface 312 a and the second side surface 312 b do not have to be inclined with respect to the bottom surface 311.

  The short protrusion 51 has a width L of about 3.0 [mm], preferably in the range of about 4.0 to 20 [mm]. The maximum length H is about 1.5 [mm], and is preferably in the range of about 1.5 to 15 [mm].

  The gap a and the gap b have the same length, but their lengths may be different. The gap a is about 0.5 [mm], and is preferably in the range of about 0 to 2 [mm]. Moreover, the clearance gap b is about 0.5 [mm], and it is preferable that it is the range of about 0-2 [mm].

  When the predetermined width G of the bottom surface 311 of the vertical joint 31 is about 20 [mm], the total of the gap a and the gap b is preferably in the range of about 0 to 10 [mm].

  The vertical joint 31 is a so-called box joint, but may be a V joint. When the vertical joint 31 is a V joint, the end in the depth direction of each of the pair of opposing side walls is the bottom 34.

  The horizontal joints 33 may be arranged in a plurality in the vertical direction, but may be one. In addition, when a plurality of the horizontal joints 33 are arranged, each may be arranged at a constant interval or may be arranged at a different interval. The horizontal joints 33 are formed in a straight line over the entire length of the surface 21 in the left-right direction, but a plurality of horizontal joints 33 may be alternately arranged in the left-right direction.

  The horizontal joint 33 is a so-called box joint, but may be a V joint.

  Each of the plurality of convex portions 4 is arranged on the surface 21 so as to be staggered in the vertical direction, but may be arranged in a line in the vertical direction.

  The method of integrally forming the substrate 2 and the short protrusion 51 is not limited to the above-described casting method, extrusion method, and cutting method.

  In the building board 1, as shown in FIG. 1, one short protrusion 51 that is long in the vertical direction is provided on the vertical joint 31, but a plurality of short protrusions 51 may be arranged in the longitudinal direction of the vertical joint 31. Good.

(effect)
As described above, the building board 1 of the present embodiment has the following configuration.

  The building board 1 of this embodiment is provided with the following 1st characteristic. In the first feature, the building board 1 is provided with a groove-shaped joint 3 extending in at least one of the longitudinal direction and the short-side direction of the surface 2 of the substrate 2 having a rectangular shape when viewed from the front. The joint 3 is provided with a projection 5 protruding from the bottom 34.

  In the building board 1, having the first feature, the building board 1 is not easily broken by forming the protrusions 5 in the portions where the joints 3 are formed and the thickness of the substrate 2 is reduced. In the building board 1 described above, the short protrusions 51 are formed particularly on the vertical joint 31. For example, at the construction site, each of the two builders carries the left and right ends of the building board 1. At this time, the bending of the central portion in the left-right direction of the building board 1 can be suppressed, and the building board 1 is hardly broken. Further, in the building board 1, for example, when a single builder carries the left and right center part of the building board 1 at the construction site and carries it, the both ends of the building board 1 in the left and right direction are generated. The strength against stress inside the building board 1 is improved. Moreover, for example, the lower end of the building board 1 is placed on the floor, and the bending of the center part in the vertical direction of the building board 1 that occurs when the upper end of the building board 1 is leaned against the wall can be suppressed. The building board 1 is difficult to break.

  Thus, when the short protrusion 51 is formed on the vertical joint 31, it is possible to prevent the building board 1 from being broken along the vertical joint 31 when carrying the building board 1. Thereby, the installer does not need to carry the building board 1 carefully more than necessary, and the time required for carrying the building board 1 by the installer can be shortened.

  Moreover, in the building board 1, since it becomes difficult to generate | occur | produce the fracture | rupture of the building board 1 by having the 1st characteristic, the fall of the fireproof performance resulting from the fracture | rupture of the building board 1, the fall of a wind-proof pressure performance, and a load-bearing performance The decrease can be suppressed.

  In addition, the building board 1 has the first feature, and unlike the convex portion 4 that becomes bright when the building board 1 is exposed to light, a shadow by the short protrusion 51 is formed on the vertical joint 31. There is a difference in contrast between the convex portion 4 and the vertical joint 31. Thereby, even if the short protrusion 51 is formed in the vertical joint 31 in the building board 1, the three-dimensional effect of the convex part 4 can be hold | maintained.

  Furthermore, the building board 1 is provided with the following 2nd characteristic. In the second feature, the vertical joint 31 is a box joint having a bottom surface 311 forming the bottom 34 and a pair of side surfaces 312 extending from the bottom surface 311 to both sides in the width direction toward the surface 21 side.

  By having this 2nd characteristic, the building board 1 can give the surface 21 a three-dimensional effect rather than the case where the vertical joint 31 is a V joint.

  Furthermore, the building board 1 is provided with the following 3rd characteristic. In the third feature, the width of the short protrusion 51 is 1/3 or more of the width of the bottom surface 311.

  In the building board 1, by having the third feature, the vertical joint 31 gives necessary rigidity and strength to the portion where the thickness of the substrate 2 becomes thin.

  Furthermore, the building board 1 is provided with the following 4th characteristic. In the fourth feature, the width of the short protrusion 51 is equal to or smaller than the width of the bottom surface 311.

  The building board 1 has the fourth feature, and when the vertical joint 31 is viewed from the front, the bottom surface 311 can be seen, so that a sense of depth is felt. In the building board 1, the short protrusion 51 is formed on the vertical joint 31. Even if is formed, the three-dimensional effect of the convex portion 4 can be further retained.

<Modification 1>
The building board 1 of 1st Embodiment may be an aspect as shown, for example in FIG. 4 (this is set as the modification 1). The building board 1 of the first modification particularly relates to the shape of the short protrusion 51 formed in the vertical joint 31.

(Description of configuration)
In the building board 1 of the first modified example, as shown in FIG. 4A, a short protrusion 51 having a long protrusion in the vertical direction is formed on the vertical joint 31. The short protrusion 51 of the ridge is formed intermittently. That is, the short protrusion 51 is formed by arranging a plurality of raised portions 53 along the vertical direction. Here, intermittently includes a mode in which each of the plurality of raised portions 53 is independent and a mode in which the plurality of raised portions 53 are connected to an inconspicuous level.

  Each of the plurality of raised portions 53 may be granular, each may be a short ridge, or may be a combination of granular and short ridges. The short protrusion 51 is preferably formed as a single protrusion as a whole by the plurality of raised portions 53. Here, the plurality of raised portions 53 are formed in FIG. 4A, but the number formed is not limited.

  In the plurality of raised portions 53, it is preferable that the cross-sectional shape perpendicular to the vertical direction changes from the upper end portion to the lower end portion. In the plurality of raised portions 53, the cross-sectional shape perpendicular to the vertical direction from the upper end portion to the lower end portion thereof may be substantially the same shape and size.

  In the short projection 51 of the first modification example, as shown in FIG. 4B, the gaps between the plurality of raised portions 53, the first protrusions 41 and the second protrusions 42 of the plurality of raised portions 53, respectively. Rainwater flows in the gaps. Moreover, when the cross-sectional shape of the plurality of raised portions 53 is changed, rainwater is further easily dispersed.

(effect)
The building board 1 according to the first modification has the following fifth feature. In the fifth feature, the protrusion 5 is constituted by a protrusion extending intermittently in the direction in which the joint 3 extends.

  The building board 1 has the fifth feature, so that the vertical joint 31 has an appearance such that the mortar is raised, and for example, it becomes easy to become familiar with the surface shape of the convex portion 4 of the masonry style.

  Moreover, in the building board 1, since it has a 5th characteristic and rainwater distributes and flows by the some protruding part 53, it can suppress that a stripe-like dirt generate | occur | produces in the vertical joint 31. FIG.

<Modification 2>
The building board 1 of 1st Embodiment may be an aspect as shown, for example in FIG. 5 (this is set as the modification 2). The building board 1 of the second modification particularly relates to the shape of the short projection 51 formed in the vertical joint 31.

(Description of configuration)
In the building board 1 of the second modified example, as shown in FIG. 5A, a short protrusion 51 having a long protrusion in the vertical direction is formed on the vertical joint 31. In this short protrusion 51, for example, as shown in FIG. 5B, the cross-sectional shape of the BB line portion at the top of the short protrusion 51 is substantially C-shaped, but as shown in FIG. The cross-sectional shape of the CC line portion at the center of the hand projection 51 is a substantially acute triangle.

  Thus, in the short projection 51 of the second modification, the cross-sectional shape orthogonal to the vertical direction changes from the upper end to the lower end.

  The configuration of the building board 1 of the second modification is not limited to the above-described one aspect, and may be the following aspect.

  The cross-sectional shape orthogonal to the vertical direction of the short protrusion 51 is not limited to the above-described substantially C shape or substantially acute triangle shape, and it is preferable to have various shapes.

(effect)
The building board 1 of the second modification has the following sixth feature. In the sixth feature, the short protrusion 51 is formed in a long protrusion in the short direction. The cross-sectional shape of the short protrusion 51 changes along the length direction of the short protrusion 51.

  In the building board 1, since it has this 6th characteristic, since the short protrusion 51 becomes various cross-sectional shape, compared with the case where the cross-sectional shape of the short protrusion 51 is constant, the rainwater which conveys the vertical joint 31 The direction in which the current flows can be dispersed as shown in FIG. Therefore, it is possible to suppress the occurrence of streak-like dirt due to rainwater flowing through the vertical joint 31.

<Modification 3>
The building board 1 of 1st Embodiment may be an aspect as shown, for example in FIG. 6 (this is set as the modification 3). The building board 1 of the third modification particularly relates to the arrangement of the short protrusions 51.

(Description of configuration)
In the building board 1 of the third modification example, as shown in FIG. 6, the short protrusions 51 are arranged on the vertical joint 31 formed in the central portion in the left-right direction of the substrate 2. The short protrusions 51 are formed on all the four vertical joints 31 in the central portion.

  In addition, in the building board 1 of this modification 3, the short joint 51 with respect to the total number of the vertical joints 31 is formed in each of the right side or the left side of the central part of the board 2 in the left-right direction. The aspect in which the said ratio in the center part is formed higher than a ratio may be sufficient.

  As described above, in the building board 1 of the third modification, the short protrusions 51 are formed on the vertical joint 31 more densely in the central portion than in the right or left portion of the central portion in the left-right direction of the substrate 2. Is done.

  The configuration of the building board 1 of the third modification is not limited to the above-described one aspect, and may be the following aspect.

  In the building board 1, the number of the vertical joints 31 in the center portion is not limited to four. Further, in the building board 1, the short protrusions 51 may not be formed on all the vertical joints 31 in the central portion, but only the short protrusions 51 may be formed on some of the vertical joints 31.

(effect)
As described above, the building board 1 of the third modification has the following configuration.

  The building board 1 of the third modification has the following seventh feature. In the seventh feature, the protrusions 5 are formed more densely at the central portion in the longitudinal direction of the substrate 2 than the other portions. In particular, in the building board 1, the short protrusions 51 are formed more densely in the central part than in parts other than the central part in the longitudinal direction of the substrate 2.

  The building board 1 has the seventh feature, so that when the builder carries the building board 1, there are more short protrusions 51 in the central portion where the building board 1 is more likely to break than the other parts. It is formed. Thereby, while the fracture | rupture of the building board 1 is suppressed, the cost concerning manufacture of the building board 1 can be suppressed by reducing the number of the short protrusions 51 rather than the above-described building board 1.

Second Embodiment
Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same reference numerals as those in the first embodiment are assigned to configurations corresponding to the first embodiment, and the configurations different from those in the first embodiment are newly assigned symbols. The building board 1 of the present embodiment particularly relates to a short protrusion 51 formed in the vertical joint 31 and a long protrusion 52 formed in the horizontal joint 33.

(Description of configuration)
In the building board 1 of the present embodiment, as shown in FIG. 7A, among the vertical joints 31 and the horizontal joints 33 formed on the substrate 2, in particular, the protrusions 5 (hereinafter referred to as longitudinal protrusions 52) on the horizontal joints 33. Is formed.

  The horizontal joint 33 of this embodiment has the same configuration as the vertical joint 31 described in the first embodiment. That is, the horizontal joint 33 is a box joint having a bottom surface 331 and a side surface 332 as shown in FIG. 7B. Here, also in the horizontal joint 33, the bottom surface 331 is the bottom 34 of the horizontal joint 33.

  The long protrusion 52 of the present embodiment protrudes forward from the bottom surface 331 in the same manner as the short protrusion 51 described in the first embodiment. The longitudinal projections 52 are formed of a cementitious material such as mortar and concrete, like the building board 1.

  In the longitudinal protrusion 52, the lateral width L at the base end portion is the maximum lateral width of the longitudinal protrusion 52. The width L of the longitudinal protrusion 52 is preferably 1/3 to 1/1 of the predetermined width G of the bottom surface of the horizontal joint 33. The long protrusion 52 has the same configuration as the short protrusion 51 in other configurations.

  In the building board 1 shown in FIG. 7A, the short protrusion 51 described in the first embodiment is formed on the vertical joint 31, and the long protrusion 52 is formed on the horizontal joint 33. Here, the longitudinal protrusion 52 is formed in a straight line over the entire length of the horizontal joint 33 in the length direction.

  In addition, it is preferable that the long protrusion 52 of this embodiment is formed in an intermittent protrusion like the short protrusion 51 of the modification 1 shown in FIG. That is, the longitudinal protrusion 52 is formed with a plurality of raised portions 53 arranged in the left-right direction. Thereby, the horizontal joint 33 becomes the appearance that the mortar was raised, and it becomes easy to become familiar with the surface shape of the convex part 4 of the masonry style, for example.

  Moreover, in the building board 1, like the short protrusion 51 of the modified example 3 shown in FIG. 6, the central portion is shorter than the central portion in the left-right direction of the substrate 2 compared to the right or left portion. It is preferable that the hand protrusion 51 is formed on the vertical joint 31. Thereby, while the fracture | rupture of the building board 1 is suppressed, the cost concerning manufacture of the building board 1 can be suppressed by reducing the number of the longitudinal protrusions 52 rather than the above-described building board 1.

  The configuration of the building board 1 of the present embodiment is not limited to the above-described one aspect, and may be the following aspect.

  Although the said longitudinal protrusion 52 is provided in all the horizontal joints 33, it is not limited to this, What is necessary is just to be provided in the at least 1 horizontal joint 33.

  The horizontal joint 33 is a so-called box joint, but may be a V joint. When the horizontal joint 33 is a V joint, the end in the depth direction of each of the pair of opposing side walls becomes the bottom 34.

(effect)
As described above, the building board 1 of the present embodiment has the following configuration.

  The building board 1 of 2nd Embodiment is equipped with the following 8th characteristic. In the eighth feature, a groove-shaped horizontal joint 33 extending in the longitudinal direction and a groove-shaped vertical joint 31 extending in the short direction are formed on the surface 21 of the substrate 2. The horizontal joint 33 is provided with a long protrusion 52 protruding from the bottom 34, and the horizontal joint 33 is provided with a short protrusion 51 protruding from the bottom 34.

  Since the building board 1 has the eighth feature, the short protrusion 51 is formed on the vertical joint 31 and the long protrusion 52 is formed on the horizontal joint 33, so that the short protrusion 51 is formed only on the vertical joint 31. As a result, the rigidity against bending when carrying the building board 1 is improved. Therefore, in the building board 1, when carrying the building board 1, it can suppress that the building board 1 will fracture | rupture along the vertical joint 31. FIG. Thereby, the installer does not need to carry the building board 1 carefully more than necessary, and the time required for carrying the building board 1 by the installer can be shortened.

  Moreover, in the building board 1, since it has the 8th characteristic and the longitudinal protrusion 52 is formed in the horizontal joint 33, when light strikes the building board 1, the convex part 4 and the horizontal joint 33 are contrasted. There will be a difference. Thereby, even if the longitudinal protrusion 52 is formed in the horizontal joint 33 in the building board 1, the three-dimensional effect of the convex part 4 can be hold | maintained.

  Furthermore, the building board 1 has the following ninth feature. In the ninth feature, the horizontal joint 33 is a box joint having a bottom surface 331 that forms the bottom portion 34 and a pair of side surfaces 332 that extend from both ends of the bottom surface 331 in the width direction to the surface 21 side.

  The building board 1 can impart a three-dimensional effect to the surface 21 by having the ninth feature as compared with the case where the horizontal joint 33 is a V joint.

  Further, the building board 1 has the following tenth feature. In the tenth feature, the width of the longitudinal protrusion 52 is １ ／ or more of the width of the bottom surface 331.

  The building board 1 has the tenth feature, so that the horizontal joint 33 provides necessary rigidity to the portion where the thickness of the substrate 2 is reduced.

  Further, the building board 1 has the following eleventh feature. In the eleventh feature, the width of the longitudinal protrusion 52 is equal to or smaller than the width of the bottom surface.

  The building board 1 has the eleventh feature so that when the horizontal joint 33 is viewed from the front, the bottom surface can be seen, so that a sense of depth is felt. In the building board 1, the longitudinal protrusions 52 are formed on the horizontal joint 33. Even if it is done, the three-dimensional effect of the convex part 4 can be hold | maintained more.

<Modification 4>
The building board 1 of 2nd Embodiment may be an aspect as shown, for example in FIG. 8 (this is made into the modification 4). The building board 1 of the fourth modification particularly relates to the arrangement of the longitudinal protrusions 52 formed in the horizontal joint 33.

(Description of configuration)
In the building board 1 according to the fourth modification, the protrusion is formed only on the horizontal joint 33 among the vertical joint 31 and the horizontal joint 33. That is, the longitudinal projection 52 is formed on the horizontal joint 33.

  As shown in FIG. 8A, the longitudinal protrusion 52 is formed in a straight line over the entire length of the horizontal joint 33 in the length direction. In the building board 1, the plurality of longitudinal protrusions 52 may be formed side by side in the longitudinal direction of the horizontal joint 33. In particular, as shown in FIG. 8B, it is preferable that the longitudinal protrusion 52 is formed at a location where the vertical joint 31 and the horizontal joint 33 intersect. In addition, the longitudinal protrusion 52 may be formed in all the places where the vertical joint 31 and the horizontal joint 33 intersect, or may be formed in a part. When it is formed in a part, it may be formed in more than 10% of all intersecting locations. In particular, it is preferably formed in the central portion in the longitudinal direction of the building board 1.

(effect)
As described above, the building board 1 of the fourth modification has the following configuration.

  The building board 1 of the modified example 4 has the following twelfth feature. According to a twelfth feature, in the building board 1, a groove-like horizontal joint 33 extending in the longitudinal direction is formed on the surface 21 of the substrate 2 having a rectangular shape when viewed from the front. The horizontal joint 33 is provided with a longitudinal protrusion 52 that protrudes from the bottom 34 thereof.

  The building board 1 has the twelfth feature, and when the building board 1 is carried while maintaining the three-dimensionality of the surface 21, the building board 1 suppresses the bending of the building board 1. It can suppress that it breaks along.

<Example of building board>
An example of the building board 1 described above is shown in FIG. 9 (this is taken as an example).

(Description of configuration)
The building board 1 of the present embodiment is a horizontal ceramics siding material formed of a cementitious material.

  In the building board 1, vertical joints 31 and horizontal joints 33 are formed on the surface 21 of the substrate 2. Further, a short protrusion 51 is formed on the vertical joint 31, and a long protrusion 52 is formed on the horizontal joint 33. In the building board 1, the surface 21 of the board | substrate 2 is divided by the vertical joint 31 and the horizontal joint 33, and the some convex part 4 is formed.

(effect)
The building board 1 of a present Example is a building board provided with the above-mentioned 1st-12th characteristic. In such a building board 1, it is suppressed that the building board 1 breaks along the vertical joint 31 when carrying the building board 1 while maintaining the three-dimensional feeling of the surface 21.

DESCRIPTION OF SYMBOLS 1 Building board 2 Board | substrate 21 Surface 3 Joint 31 Vertical joint 33 Horizontal joint 34 Bottom part 5 Protrusion 51 Short protrusion 52 Long protrusion

Claims (5)

A building board in which a groove-like joint extending in at least one of the longitudinal direction and the short-side direction of the substrate surface that is rectangular in front view is formed,
The building board is characterized in that the joint is provided with a protrusion protruding from the bottom.   The building board according to claim 1, wherein the protrusion is configured by a protrusion extending intermittently in a direction in which the joint extends.   3. The building board according to claim 1, wherein the protrusion is formed more densely at a central portion in the longitudinal direction of the substrate than at other portions.   The said joint is a box joint which has a bottom face which forms a bottom part, and a pair of side surface extended to the surface side from the width direction both ends of the said bottom face, The Claim 1 characterized by the above-mentioned. Building board as described in   The building board according to claim 4, wherein a width of the protrusion is 1/3 or more of a width of the bottom surface.