JP7551556B2 - Building board - Google Patents

Description

The present invention relates to building boards for forming interior and exterior walls of buildings.

Patent Document 1 describes an armor-like building board with flat and inclined surfaces. Patent Document 2 describes an example in which the surfaces of building boards with flat and inclined surfaces face each other and are in contact with each other without any gaps.

Publication No. 4-9388 JP 2003-147898 A

In the building boards described in Patent Document 1, when two building boards are placed with their surfaces facing each other, the flat surface of one building board comes into contact with the flat surface of the other building board. As a result, many gaps are formed between the surfaces where they do not come into contact, and the area where they come into contact and support each other is small, making the two building boards prone to slippage. Therefore, if the building boards placed in this manner are packed into a package and then transported, or if multiple packages are stored stacked together, the vibrations and forces that the packages receive can cause the two building boards to slip, which can result in damage to the building boards, such as chips.

In addition, in the building board described in Patent Document 2, the surfaces of one board and the other board are in contact with each other with no gaps, so when pressure is applied from above or below, for example, the impact is easily transmitted because there is no gap (crevice), and as a result, there is a risk of damage such as chipping occurring in the building board. As such, there is room for further improvement in the building boards described in Patent Documents 1 and 2.

The purpose of this application is to provide a building board that can prevent damage such as chipping when two building boards are placed together with their surfaces facing each other.

According to a first aspect of the present invention, a building board has a front surface and a back surface, and has a design surface on at least the front surface, and the front surface has at least a first design portion extending in a first direction, and a second design portion arranged in a second direction intersecting the first direction and extending in the first direction, and the first design portion has a first flat portion having a flat surface extending in the first direction, and a first inclined portion inclined from an end of the first flat portion in the second direction toward the back surface with respect to the flat surface of the first flat portion, and the second design portion extends in the first direction. The building board is provided with a second flat portion having a flat surface, and a second inclined portion inclined from the end of the second flat portion in a second direction toward the back surface relative to the flat surface of the second flat portion, and when the respective surfaces of two building boards are placed with the first design portion of one building board facing the second design portion of the other building board, the first inclined portion of the first design portion and the second inclined portion of the second design portion are in surface contact at least in part, and gaps are formed between the first inclined portion and the second flat portion, and between the second inclined portion and the first flat portion, so that they are not in contact with each other.
In the first aspect of the present invention, when two building boards are placed with their surfaces facing each other, the first inclined portion of the first design portion and the second inclined portion of the second design portion are in surface contact at least in part, making it possible to prevent the two building boards from slipping. As a result, damage such as chipping is prevented. In addition, since gaps are formed between the first inclined portion and the second flat portion, and between the second inclined portion and the first flat portion, and they are not in contact with each other, even if pressure is applied from above and below during packaging, the pressure is absorbed by the gap, so that impacts such as pressure are less likely to be transmitted compared to when there is no gap and they are in surface contact. As a result, damage such as chipping of the building board is prevented.

In the building board of the second aspect of the present invention, it is preferable that the length of the first design portion in the second direction is 1.5 times or less the length of the second design portion.
In the building board of the second aspect of the present invention, the length of the first design portion is close to the length of the second design portion, so that when two building boards are placed with their surfaces facing each other, the first inclined portion of the first design portion and the second inclined portion of the second design portion are likely to come into surface contact, and as a result, the building boards support each other stably and prevent damage such as chipping.

In the building board of the third aspect of the present invention, it is preferable that the length of the first flat portion in the second direction is 1.75 times or less the length of the second flat portion.
In the building board of the third aspect of the present invention, the length of the first flat portion is close to the length of the second flat portion, so that when two building boards are placed with their surfaces facing each other, the first inclined portion of the first design portion and the second inclined portion of the second design portion are likely to come into surface contact, and as a result, the building boards support each other stably and prevent damage such as chipping.

The building board of the fourth aspect of the present invention preferably has a recessed joint that extends in the first direction and connects to at least one of the first design portion and the second design portion in the second direction.
The building board of the fourth aspect of the present invention has a recessed joint, so that when two building boards are placed with their surfaces facing each other, a gap is generated. Even if the packaged body sways left and right when the two building boards thus placed are packed and transported, the gap absorbs the swaying, so that damage such as chipping of the building boards can be further prevented.

In the building board of the fifth aspect of the present invention, it is preferable that at least one of the first design portion and the second design portion is formed with one or more recessed portions.
The building board according to the fifth aspect of the present invention has a recessed portion, so that any shine occurring on the design surface can be made less noticeable.

FIG. 2 is a plan view of the exterior wall panel according to the first embodiment of the present invention. FIG. 2 is a side view of the siding of FIG. 1 . FIG. 2 is a side view showing two exterior wall panels of FIG. 1 placed with their surfaces facing each other. FIG. 4 is a partial enlarged view of a region R1 in FIG. 3 . FIG. 2 is a side view showing two exterior wall panels of FIG. 1 placed with the back surface of one panel on top of the front surface of the other panel. FIG. 5 is a side view of an exterior wall panel according to a second embodiment of the present invention. 5 is a partial enlarged view of a region R2 corresponding to the region R1 in FIG. 3 in a state where two exterior wall panels according to a third embodiment of the present invention are placed with their surfaces facing each other. FIG. FIG. 10 is a side view of an exterior wall panel according to a fourth embodiment of the present invention. FIG. 13 is a side view of an exterior wall panel according to a fifth embodiment of the present invention. 13 is a partial enlarged view of a region R3 corresponding to the region R1 in FIG. 3 in a state where two exterior wall panels according to a sixth embodiment of the present invention are placed with their surfaces facing each other. FIG.

Each embodiment of the present invention will be described in detail below with reference to the drawings.

First Embodiment
The exterior wall panel 1A according to the first embodiment of the present invention (an example of a "building panel") is made of a ceramic material containing cement, and has a generally rectangular shape elongated in the left-right direction as shown in FIG. 1, with a horizontal dimension t1 of about 3030 mm and a vertical dimension t2 of about 455 mm. Of course, the horizontal and vertical dimensions are not limited to these, and may have a width. For example, the horizontal dimension is in the range of 1800 to 3030 mm, and the vertical dimension is in the range of 455 to 1000 mm. The thickness of the exterior wall panel 1A is, for example, 14 to 30 mm. In FIG. 1, the vertical upward direction is indicated as "up," the vertical downward direction is indicated as "down," the horizontal right direction is indicated as "right," and the horizontal left direction is indicated as "left." In FIG. 1, the front side of the paper is indicated as the front side, and the back side of the paper is indicated as the back side. The directions shown in FIG. 2 and the subsequent figures are indicated in correspondence with FIG. 1.

The exterior wall panel 1A has, for example, a top-bottom joint structure. As shown in FIG. 2, the upper edge of the exterior wall panel 1A has a back surface protrusion (lower solid portion) 7A that protrudes upward on the back surface 3A side as a joint where the exterior wall panel 1A overlaps with the adjacent exterior wall panel 1A. Furthermore, the lower edge of the exterior wall panel 1A has a front surface protrusion (upper solid portion) 6A that is recessed on the back surface 3A side as a joint where the exterior wall panel 1A overlaps with the adjacent exterior wall panel 1A.

The upper and lower exterior wall panels 1A are joined by overlapping the front protrusion 6A of the upper exterior wall panel 1A with the back protrusion 7A of the lower exterior wall panel 1A. The upper and lower exterior wall panels 1A are joined using metal fittings or the like. As shown in FIG. 1, the left side surface 14A and the right side surface 13A of the exterior wall panel 1A do not have the front protrusion 6A and the back protrusion 7A as joints like the lower side surface 12A and the upper side surface 11A (however, the back protrusion 7A is not shown in FIG. 1). Therefore, when joining the left and right exterior wall panels 1A, the right side surface 13A of the left exterior wall panel 1A and the left side surface 14A of the right exterior wall panel 1A are joined. At this time, the left and right exterior wall panels 1A may be joined by using a sealant. In this way, the exterior wall panel 1A of this embodiment does not have a front protrusion 6A and a back protrusion 7A as joints on the left side 14A and the right side 13A like the lower side 12A and the upper side 11A, but it is not limited to this, and the left side 14A and the right side 13A may also have a front protrusion and a back protrusion that extend in the left-right direction, and they may be joined without using a sealant.

As shown in FIG. 2, the exterior wall panel 1A has a design surface 2A on the front side. The design surface 2A is the surface facing the exterior of the exterior wall when the exterior wall panel 1A is installed, and is the part that constitutes the pattern or design of the exterior wall panel 1A. In this embodiment, the design surface 2A occupies an area from the end of the front side of the lower surface 12A to the end of the front side of the upper surface 11A in the vertical direction, and an area from the end of the front side of the left side surface 14A to the end of the front side of the right side surface 13A in the horizontal direction (see FIG. 1).

The design surface 2A has a first design portion 21A, a third design portion 23A, and a second design portion 22A in the order from bottom to top. As shown in FIG. 1, the first design portion 21A extends in the left-right direction (one example of the "first direction") from the end of the surface side of the left side surface 14A to the end of the surface side of the right side surface 13A. As shown in FIG. 2, the first design portion 21A is composed of a first flat portion 211A having a flat surface and a first inclined portion 212A having an inclined surface, imitating one layer of armor of an armor wall. Similarly, the second design portion 22A and the third design portion 23A also extend in the left-right direction from the end of the surface side of the left side surface 14A to the end of the surface side of the right side surface 13A. The second design portion 22A is also composed of a second flat portion 221A having a flat surface and a second inclined portion 222A having an inclined surface, and the third design portion 23A is also composed of a third flat portion 231A having a flat surface and a third inclined portion 232A having an inclined surface. Therefore, the design surface 2A imitates the three-tiered armor of the armor wall.

In the first design portion 21A, the inclined surface of the first inclined portion 212A is inclined at an angle θ1 between a virtual flat surface (surface shown by a dashed line in FIG. 2) that is a virtual extension of the flat surface of the first flat portion 211A from its upper end further upward (in the direction in which the first inclined portion 212A is arranged) and the inclined surface of the first inclined portion 212A in the direction from the upper end of the flat surface of the first flat portion 211A toward the back surface 3A of the exterior wall panel 1A. In this embodiment, the angle θ1 is, for example, greater than 5° and 10° or less, and more preferably, 1° to 5°. The vertical width dimension t21 of the first flat portion 211A is set to, for example, 35 to 55 mm, and the vertical width dimension t22 of the first inclined portion 212A is set to, for example, 80 to 125 mm. The inclined surface of the first inclined portion 212A is flat.

In the second design portion 22A, the inclined surface of the second inclined portion 222A is inclined at an angle θ1 between the inclined surface of the second inclined portion 222A and the flat surface of the second flat portion 221A extended further upward from its upper end in the direction from the upper end of the flat surface of the second flat portion 221A toward the back surface 3A of the exterior wall panel 1A, similar to the inclined surface of the first inclined portion 212A. In the second design portion 22A, the inclined surface of the second inclined portion 222A is inclined at an angle θ1 between the inclined surface of the second inclined portion 222A and the imaginary flat surface of the second flat portion 221A extended further upward (in the direction in which the second inclined portion 222A is arranged) in the direction from the upper end of the flat surface of the second flat portion 221A toward the back surface 3A of the exterior wall panel 1A. The vertical width dimension t27 of the second flat portion 221A is set to, for example, 20 to 50 mm, and the vertical width dimension t28 of the second inclined portion 222A is set to, for example, 80 to 125 mm. The inclined surface of the second inclined portion 222A is also flat.

In the third design portion 23A, the inclined surface of the third inclined portion 232A, like the inclined surface of the first inclined portion 212A, is inclined in the direction from the upper end of the flat surface of the third flat portion 231A toward the rear surface 3A of the exterior wall panel 1A at an angle θ1 formed by the inclined surface of the third inclined portion 232A and a virtual flat surface obtained by virtually extending the flat surface of the third flat portion 231A further upward (in the direction in which the third inclined portion 232A is arranged). The vertical width dimension t24 of the third flat portion 231A is set to, for example, 20 to 50 mm, and the vertical width dimension t25 of the third inclined portion 232A is set to, for example, 80 to 125 mm. The inclined surface of the third inclined portion 232A is also flat.

In this embodiment, the three angles θ1 in the first to third design portions 21A to 23A may be different angles, but are preferably close to each other, for example, between 1 and 5°. It is also more preferable for the three angles θ1 to be the same. The closer the three angles θ1 are, the easier it is for the inclined surfaces to come into contact with each other when they come into contact with each other, and therefore the building boards can be supported more stably.

On the design surface 2A, a groove-shaped first horizontal joint 24A (an example of a "recessed joint") is formed in the left-right direction between the first design portion 21A and the third design portion 23A in the up-down direction as shown in Fig. 1. In other words, the first horizontal joint 24A connects the first design portion 21A and the third design portion 23A. As shown in Fig. 2, the first horizontal joint 24A is composed of a first inclined surface 241A, a first inner bottom surface 242A, and a first inclined surface 243A in the top-to-bottom direction. As shown in FIG. 4, the first inclined surface 241A (indicated by 241Aa in FIG. 4, which will be described later) rises upward from the upper end of the first inner bottom surface 242A (indicated by 242Aa in FIG. 4, which will be described later) at an angle θ3, and the first second inclined surface 243A (indicated by 243Aa in FIG. 4, which will be described later) rises downward from the lower end of the first inner bottom surface 242A at an angle θ2. In this embodiment, the angle θ3 is, for example, 40 to 80°, and the angle θ2 is, for example, 25 to 65°. In this embodiment, θ3>θ2>θ1. The height t41 of the first inclined surface 241A from the first inner bottom surface 242A is set to, for example, 2 to 10 mm, and the height t42 of the first second inclined surface 243A from the first inner bottom surface 242A is set to, for example, 0.5 to 4 mm. The vertical dimension of the first inner bottom surface 242A is set to, for example, 0.5 to 8 mm.

On the design surface 2A, between the third design portion 23A and the second design portion 22A in the up-down direction, as shown in FIG. 1, a groove-shaped second horizontal joint 25A (an example of a "recessed joint") is formed in the left-right direction. In other words, the second horizontal joint 25A connects the third design portion 23A and the second design portion 22A. As shown in FIG. 2, the second horizontal joint 25A is composed of a second first inclined surface 251A, a second inner bottom surface 252A, and a second second inclined surface 253A in a top-down direction. As shown in FIG. 4, the second first inclined surface 251A rises upward from the upper end of the second inner bottom surface 252A at an angle θ3, and the second second inclined surface 253A rises downward from the lower end of the second inner bottom surface 252A at an angle θ2. In this embodiment, the angle θ3 is, for example, 40 to 80°, and the angle θ2 is, for example, 25 to 65°. In this embodiment, θ3>θ2>θ1. However, in FIG. 4, the first horizontal joint 24A is shown facing up, and the second horizontal joint 25A is shown facing down. The angles θ2 and θ3 for the second horizontal joint 25A are the same as the angles θ2 and θ3 for the first horizontal joint 24A. The height t41 of the second first inclined surface 251A from the second inner bottom surface 252 is set to, for example, 2 to 10 mm, and the height t42 of the second second inclined surface 253A from the second inner bottom surface 252 is set to, for example, 0.5 to 4 mm. The vertical dimension of the second inner bottom surface 252 is set to, for example, 0.5 to 8 mm.

Furthermore, as shown in FIG. 2, a first joint 26A (an example of a "recessed joint") is formed on the lower surface 12A side of the design surface 2A, and a second joint 27A (an example of a "recessed joint") is formed on the upper surface 11A side. When the upper and lower exterior wall panels 1A are joined, the first joint 26A of the upper exterior wall panel 1A and the second joint 27A of the lower exterior wall panel 1A are joined to form a joint. The first joint 26A is located below the first design portion 21A and is connected to the first design portion 21A. The second joint 27A is located above the second design portion 22A and is connected to the second design portion 22A.

The first joint joint 26A is composed of a first joint joint surface 262A and a first joint joint inclined surface 261A in the direction from bottom to top. The first joint joint 26A is formed along the edge of the surface side of the lower side 12A from the edge of the surface side of the left side surface 14A to the edge of the surface side of the right side surface 13A on the left and right sides of the exterior wall panel 1A (see FIG. 1). The first joint joint inclined surface 261A rises upward from the upper edge of the first joint joint surface 262A at an angle θ3. The angle θ3 of the first joint joint 26A is the same as the angle θ3 of the first horizontal joint 24A and the second horizontal joint 25A. The vertical dimension of the first joint joint surface 262A is set to, for example, 0.5 to 8 mm.
As shown in FIG. 2, the second joint joint 27A is composed of a second joint joint inclined surface 273A and a second joint joint surface 272A in a bottom-to-top direction. The second joint joint 27A is also formed along the end of the surface side of the lower surface 12A from the end of the surface side of the left side surface 14A to the end of the surface side of the right side surface 13A on the left and right sides of the exterior wall panel 1A (see FIG. 1). The second joint joint inclined surface 273A rises downward from the lower end of the second joint joint surface 272A at an angle θ2. The angle θ2 regarding the second joint joint 27A is the same as the angle θ2 regarding the first horizontal joint 24A and the second horizontal joint 25A. The vertical dimension of the second joint joint surface 272A is set to, for example, 0.5 to 8 mm. In this embodiment, the first joint joint surface 262A is perpendicular to the lower surface 12A, and the second joint joint surface 272A is perpendicular to the upper surface 11A.

When packaging the exterior wall panels 1A configured as above, two exterior wall panels 1A are packaged together. FIG. 3 shows the state in which two exterior wall panels 1Aa, 1Ab are placed for packaging. Here, the two exterior wall panels 1Aa, 1Ab are exterior wall panels 1A of the same shape, but for convenience of explanation, different suffixes "a" and "b" are used to distinguish between the two exterior wall panels 1A. This is the same even in different embodiments, and also in the case where a different suffix "c" is used. When the two exterior wall panels 1Aa, 1Ab are placed for packaging, interleaf paper (sheet) is sandwiched between the exterior wall panels 1Aa and 1Ab to protect the surfaces of each of the exterior wall panels 1Aa, 1Ab, but the interleaf paper is omitted in FIG. 3.

In Fig. 3, the exterior wall panel 1Aa placed on the lower side is placed with the design surface 2Aa facing outward, similar to the exterior wall panel 1A shown in Fig. 2. The exterior wall panel 1Ab is placed on the design surface 2Aa of the exterior wall panel 1Aa with the design surface 2Ab facing down and upside down. In other words, as shown in Fig. 3, the exterior wall panels 1Aa and 1Ab are placed with the first design portion 21Aa facing the second design portion 22Ab, the second design portion 22Aa facing the first design portion 21Ab, and the third design portion 23Aa facing the third design portion 23Ab. As a result, a part of the inclined surface of the first inclined portion 212Aa included in the first design portion 21Aa of the exterior wall panel 1Aa and a part of the inclined surface of the second inclined portion 222Ab included in the second design portion 22Ab of the exterior wall panel 1Ab come into face-to-face contact at the vertical width dimension t31. Similarly, a part of the inclined surface of the second inclined portion 222Aa included in the second design portion 22Aa of the exterior wall panel 1Aa and a part of the inclined surface of the first inclined portion 212Ab included in the first design portion 21Ab of the exterior wall panel 1Ab come into face-to-face contact at the vertical width dimension t35. Similarly, a part of the inclined surface of the third inclined portion 232Aa included in the third design portion 23Aa of the exterior wall panel 1Aa and a part of the inclined surface of the third inclined portion 232Ab included in the third design portion 23Ab of the exterior wall panel 1Ab come into face-to-face contact at the vertical width dimension t33. At this time, none of the first to third flat portions 211Aa to 231Aa included in the first to third design portions 21Aa to 23Aa of the exterior wall panel 1Aa come into contact with any of the surfaces included in the first to third design portions 21Ab to 23Ab of the exterior wall panel 1Ab. Similarly, none of the first to third flat portions 211Ab to 231Ab included in the first to third design portions 21Ab to 23Ab of the exterior wall panel 1Ab come into contact with any of the surfaces included in the first to third design portions 21Aa to 23Aa of the exterior wall panel 1Aa. In this embodiment, the dimensions t31, t35, and t33 are, for example, 50 to 100 mm. In addition, the dimensions t30, t32, t34, and t36 of the vertical widths of the portions that are not in contact with each other are, for example, 35 to 85 mm.

In this way, in the exterior wall panels 1A of this embodiment, when two exterior wall panels 1Aa, 1Ab are placed with their respective design surfaces 2Aa, 2Ab facing each other and the top and bottom of one exterior wall panel 1Ab inverted relative to the top and bottom of the other exterior wall panel 1Aa, the two exterior wall panels 1Aa, 1Ab are in face-to-face contact on three surfaces, so they support each other at the face-to-face contact parts and are unlikely to slip. Therefore, when building panels placed in this manner are packed into a package and the resulting package is transported or multiple packages are stored in a stacked state, the package is subjected to vibrations and forces, but the two exterior wall panels 1Aa, 1Ab are unlikely to slip, making it possible to reduce the occurrence of damage such as chipping caused by the package during transportation or storage. At this time, the first flat portion 211Aa and the first flat portion 211Ab do not face each other, the third flat portion 231Aa and the third flat portion 231Ab do not face each other, and the second flat portion 221Aa and the second flat portion 221Ab do not face each other. Also, at this time, the first flat portion 211Aa and the second inclined portion 222Ab do not come into contact with each other, the second flat portion 221Aa and the first inclined portion 212Ab do not come into contact with each other, and the third flat portion 231Aa and the third inclined portion 232Ab do not come into contact with each other, and a gap is formed between them. Similarly, the first flat portion 211Ab and the second inclined portion 222Aa do not come into contact with each other, the second flat portion 221Ab and the first inclined portion 212Aa do not come into contact with each other, and the third flat portion 231Ab and the third inclined portion 232Aa do not come into contact with each other, and a gap is formed between them. Because of these gaps, even if pressure is applied from above and below during packaging, the pressure is absorbed by the gaps, so shocks such as pressure are less likely to be transmitted than if there were no gaps and the panels were in face-to-face contact. As a result, damage such as chipping of the building boards is prevented.

In this embodiment, the vertical width dimension (t21 + t22) of the first design portion 21A is, for example, 115 to 180 mm. In contrast, the vertical width dimension (t27 + t28) of the second design portion 22A is 100 to 170 mm. In this embodiment, if the variation in the vertical width dimension of the first design portion 21A/the vertical width dimension of the second design portion 22A becomes large, the area of the surfaces in face-to-face contact will decrease, which may result in the effect of preventing the two exterior wall panels 1Aa, 1Ab from shifting easily being lost. Therefore, it is preferable that this ratio be within the range of 0.8 to 1.5.

In this embodiment, the vertical width dimension t21 of the first flat portion 211A included in the first design portion 21A is, for example, 35 to 55 mm. In contrast, the vertical width dimension t27 of the second flat portion 221A included in the second design portion 22A is 20 to 50 mm. An increase or decrease in the ratio of the vertical width dimension of the first flat portion 211A to the vertical width dimension of the second flat portion 221A indicates that the vertical width of at least one of the first design portion 21A and the second design portion 22A fluctuates, that is, that there is a variation in at least one of the dimensions t21 + t22 of the first design portion 21A and the dimensions t27 + t28 of the second design portion 22A. If this variation becomes large, the area of the surfaces in contact with each other will decrease, which may result in the effect of preventing the two exterior wall panels 1Aa and 1Ab from slipping. Therefore, it is preferable that this ratio value be within the range of 0.8 to 1.75. The first flat portion 211A has a larger vertical width than the second flat portion 221A because it includes the surface protrusion 6A. Therefore, the variation ratio is also larger than the variations of the design portions described above.

In addition, in this embodiment, the vertical width dimensions t22, 25, 28 of the first to third inclined portions 212A to 232A included in the first to third design portions 21A to 23A are, for example, 80 to 125 mm. If the variation in these dimensions becomes large, the surface area of the faces that come into contact with each other will decrease, which may result in the effect of preventing the two exterior wall panels 1Aa, 1Ab from shifting easily being lost. Therefore, it is preferable that the value of this ratio is within the range of 0.8 to 1.5.

When two exterior wall panels 1Aa, 1Ab are placed in the state shown in FIG. 3, a gap Ga is formed between the first horizontal joint 24Aa of the exterior wall panel 1Aa and the second horizontal joint 25Ab of the exterior wall panel 1Ab, as shown in FIG. 4. The gap Ga is formed by forming the first and second horizontal joints 24A, 25A recessed toward the back surface 3A side from the respective surfaces of the first to third design parts 21A to 23A. In addition, the difference between the vertical width dimension of the first inner bottom surface 242A included in the first horizontal joint 24A and the vertical width dimension of the second inner bottom surface 252A included in the second horizontal joint 25A also affects the formation of the gap Ga. The distance between the first 1 inclined surface 241Aa included in the first horizontal joint 24Aa and the second 1 inclined surface 251Ab included in the second horizontal joint 25Ab is parallel. This is because the first inner bottom surface 242Aa included in the first horizontal joint 24Aa and the second inner bottom surface 252Ab included in the second horizontal joint 25Ab are parallel, and the first inclined surface 241Aa and the second inclined surface 251Ab rise from the first inner bottom surface 242Aa and the second inner bottom surface 252Ab, respectively, at the same angle θ3. The gap Ga thus formed prevents the intersection (corner) between the flat surface of the second flat portion 221Ab included in the second design portion 22Ab of the exterior wall panel 1Ab and the second 1 inclined surface 251Ab included in the second horizontal joint 25Ab from colliding with the first 1 inclined surface 241Aa included in the first horizontal joint 24Aa of the exterior wall panel 1Aa and being chipped when pressure is applied in the left-right direction during transportation, etc., and prevents the intersection (corner) between the flat surface of the third flat portion 231Aa included in the third design portion 23Aa of the exterior wall panel 1Aa and the first 1 inclined surface 241Aa included in the first horizontal joint 24Aa from colliding with the second 1 inclined surface 251Ab included in the second horizontal joint 25Ab of the exterior wall panel 1Ab and being chipped.

The number of faces in face-to-face contact is not limited to the three mentioned above, but may be one or two faces, or more than three faces (four or more).

Furthermore, the degree to which it is difficult to slip also depends on the angle θ1 (see Figure 2). For example, if θ1 is within the range of 1° to 5°, the effect of preventing slippage can be obtained.

In addition, as a mounting manner for placing two exterior wall panels 1A, there is also a mounting manner in which the back surface 3A of one exterior wall panel 1A is placed on the design surface 2A of the other exterior wall panel 1A (so-called stick stacking, which is performed at a construction site, etc.). Figure 5 shows the state in which two exterior wall panels 1Aa, 1Ac are mounted in this manner. Even when the exterior wall panels 1A of this embodiment are mounted in this manner, the first to third flat portions 211Aa to 231Aa included in the first to third design portions 21Aa to 23Aa, respectively, of one exterior wall panel 1Aa and the back surface 3Ac of the other exterior wall panel 1Ac are in face-to-face contact on the three surfaces indicated by the above dimensions t21, t24, and t27. Furthermore, this face-to-face contact is face-to-face contact by flat surfaces. Therefore, even if two or more exterior wall panels 1A are placed in this manner, adjacent exterior wall panels 1A are unlikely to shift from each other and are placed stably, so that the placement state is not easily disturbed and damage such as chipping can be prevented. However, in this case, it is preferable that the heights in the thickness direction of the first to third flat portions 211A to 231A are the same on at least two flat surfaces. It is more preferable that the heights in the thickness direction of all of the first to third flat portions 211A to 231A are the same. In this case, none of the first to third inclined portions 212Aa to 232Aa included in the first to third design portions 21Aa to 23Aa of the exterior wall panel 1Aa, respectively, abuts against the back surface 3Ac of the exterior wall panel 1Ac. In addition, the inclined surfaces of the first to third inclined portions 212A to 232A are inclined in a direction from the upper end of each flat surface of the first to third flat portions 211A to 231A toward the back surface 3A of the exterior wall panel 1A, so that the surfaces of the first to third inclined portions 212A to 232A do not protrude from the surfaces of the first to third flat portions 211A to 231A. Note that, although FIG. 5 shows an example in which the front protrusion of the exterior wall panel 1Aa faces the back protrusion of the exterior wall panel 1Ac, and the back protrusion of the exterior wall panel 1Aa faces the front protrusion of the exterior wall panel 1Ac, the front protrusions of the exterior wall panels 1Aa and 1Ac may be placed so that the front protrusions and the back protrusions face each other. In this case, too, the flat surfaces of the exterior wall panel 1Aa come into contact with the back surface 3Ac of the exterior wall panel 1Ac on three sides, so that the placement state is not collapsed and damage such as chipping can be prevented as described above.

As shown in FIG. 4, the third flat portion 231A included in the third design portion 23A has a recessed portion 231a recessed from the front surface to the back surface 3A. The recessed portion 231a is intended to make the shine less noticeable when it occurs on the design surface 2A by eliminating the continuity of the shine or changing the angle of the received light. In FIG. 4, only one recessed portion 231a is formed in the third flat portion 231A, but in reality, multiple recessed portions 231a are formed irregularly. The location where the recessed portion 231a is formed is not limited to the third flat portion 231A, but may be the third inclined portion 232A or the entire third design portion 23A. Furthermore, the recessed portion 231a is not limited to the third design portion 23A, but may be the first design portion 21A or the second design portion 22A. Also, the recessed portion 231a may be any one or more of the first to third design portions 21A to 23A.

In this embodiment, the first design portion 21A, the third design portion 23A, and the second design portion 22A are arranged in this order from bottom to top, but the design portions do not necessarily have to be arranged in this order. For example, the design portion located at the bottom may be the third design portion or the second design portion instead of the first design portion.
Furthermore, the third design surface does not have to have the same shape as design surfaces 1 and 2, as long as it does not interfere with the two loading modes described above (when packed and when stacked).

Second Embodiment
As shown in Fig. 6, the exterior wall panel 1B according to the second embodiment of the present invention has a different design surface 2B from the exterior wall panel 1A according to the first embodiment. The design surface 2B of the exterior wall panel 1B has a first design portion 21B, a second design portion 22B, a horizontal joint 24B, and first and second joints 26B, 27B. In other words, while the exterior wall panel 1A according to the first embodiment has three design portions 21A to 23A, the exterior wall panel 1B according to this embodiment has two design portions 21B and 22B.

In addition, the first to third design portions 21A to 23A each have the first to third flat portions 211A to 231A and the first to third inclined portions 212A to 232A in a bottom-to-top direction, whereas the first and second design portions 21B, 22B each have the first and second flat portions 211B, 221B and the first and second inclined portions 212B, 222B in a top-to-bottom direction. The inclined surfaces of the first and second inclined portions 212B, 222B are flat.

Furthermore, the vertical width dimensions t52, t54 of the first and second flat portions 211B, 221B are the same, and the vertical width dimensions t51, t53 of the first and second inclined portions 212B, 222B are also set to be the same. The dimensions t51, t53 are set wider than the dimensions t52, t54, respectively. As a result, when two exterior wall panels 1Ba, 1Bb are placed in the manner shown in Figure 3 above, a part of the inclined surface of the first inclined portion 212Ba included in the first design portion 21Ba of one exterior wall panel 1Ba and a part of the inclined surface of the second inclined portion 222Bb included in the second design portion 22Bb of the other exterior wall panel 1Bb come into face-to-face contact. Similarly, a part of the inclined surface of the second inclined portion 222Ba included in the second design portion 22Ba of one exterior wall panel 1Ba and a part of the inclined surface of the first inclined portion 211Bb included in the first design portion 21Bb of the other exterior wall panel 1Bb are in face-to-face contact. In this way, there are two faces that are in face-to-face contact, but since these two faces support each other, the effect of preventing the two exterior wall panels 1Ba and 1Bb from shifting is obtained. In addition, the dimensions t51 and t53 may be set to be the same as the dimensions t52 and t54, respectively, or may be set to be narrower than the dimensions t52 and t54. Also, as described above, the parts where the flat portions and the inclined portions face each other do not abut each other, and a gap is formed, which absorbs pressure in the vertical direction, thereby preventing damage such as chipping of the building panels.

The number of horizontal joints 24B is also different from the two in the exterior wall panel 1A of the first embodiment, but is one in this embodiment. Furthermore, the cross-sectional shape of the horizontal joint 24B is also different in that it is V-shaped, whereas it was concave in the exterior wall panel 1A of the first embodiment. And the first joint joint 26B and the second joint joint 27B are also V-shaped when the two exterior wall panels 1B are joined vertically, so that the first joint joint 26B is made of an inclined surface rising upward from the lower surface 12B, and the second joint joint 27B is made of an inclined surface rising downward from the upper surface 11B.

Furthermore, when two exterior wall panels 1Ba, 1Bc are placed in such a manner that the back surface 3Bc of one exterior wall panel 1Bc is placed on the design surface 2Ba of the other exterior wall panel 1Ba, the first and second flat portions 211Ba, 221Ba included in the first and second design portions 21Ba, 22Ba of one exterior wall panel 1Ba, respectively, come into face-to-face contact with the back surface 3Bc of the other exterior wall panel 1Bc on two surfaces. However, since this face-to-face contact is by flat surfaces, adjacent exterior wall panels 1B are unlikely to shift and are placed stably, so that the placement state can be prevented from collapsing even when multiple exterior wall panels 1B are placed.

Third Embodiment
The exterior wall panel 1C according to the third embodiment of the present invention is different from the exterior wall panel 1A according to the first embodiment in that the cross-sectional shapes of the first and second horizontal joints 24C, 25C are different from the cross-sectional shapes of the first and second horizontal joints 24A, 25A. Figure 7 shows the cross-sectional shapes of the first and second horizontal joints 24C, 25C. However, as in Figure 4, Figure 7 shows a partial enlarged view of two exterior wall panels 1Ca, 1Cb placed in the manner shown in Figure 3, so the second horizontal joint 25Cb shown in Figure 7 is not the second horizontal joint 25Ca of the exterior wall panel 1Ca, but the second horizontal joint 25Cb of the exterior wall panel 1Cb with the exterior wall panel 1Ca turned backwards. However, the cross-sectional shape of the second horizontal joint 25Cb is not different from the cross-sectional shape of the first horizontal joint 25Ca.

As shown in FIG. 7, the angle θ4 at which the first 1 inclined surface 241Ca included in the first horizontal joint 24Ca rises upward from the first inner bottom surface 242Ca is set steeper than the angle θ3 (see FIG. 4) at which the first 1 inclined surface 241Aa included in the first horizontal joint 24Aa rises from the first inner bottom surface 242Aa. However, the angle θ3 at which the second 1 inclined surface 251Cb included in the second horizontal joint 25Cb rises from the second inner bottom surface 252Cb is the same as the angle θ3 (see FIG. 4) at which the second 1 inclined surface 251Ab included in the second horizontal joint 25Ab rises from the second inner bottom surface 252Ab. In this embodiment, the angle θ4 is set to, for example, 50 to 80°.

The angle θ5 at which the second two inclined surfaces 253Cb included in the second horizontal joint 25Cb rise from the second inner bottom surface 252Cb is set to be gentler than the angle θ2 (see FIG. 4) at which the second two inclined surfaces 253Ab included in the second horizontal joint 25Ab rise from the second inner bottom surface 252Ab. However, the angle θ2 at which the first two inclined surfaces 243Ca included in the first horizontal joint 24Ca rise downward from the first inner bottom surface 242Ca is the same as the angle θ2 (see FIG. 4) at which the first two inclined surfaces 243Aa included in the first horizontal joint 24Aa rise downward from the first inner bottom surface 252Aa. In this embodiment, the angle θ5 is set to 10 to 50°.

As a result, as shown in FIG. 7, the distance between the first 1 inclined surface 241Ca included in the first horizontal joint 24Ca and the second 1 inclined surface 251Cb included in the second horizontal joint 25Cb changes from the parallel state described above to a narrower state, so that the volume of the gap Gc is smaller than the volume of the gap Ga in FIG. 4. However, the effect of the gap Gc is the same as the effect of the gap Ga.

Fourth Embodiment
As shown in Fig. 8, the exterior wall panel 1D according to the fourth embodiment of the present invention has a different design surface 2D from the exterior wall panel 1A according to the first embodiment. The design surface 2D of the exterior wall panel 1D includes a first design portion 21D, a second design portion 22D, a third design portion 23D, a fourth design portion 30D, first to third horizontal joints 24D, 25D, and 31D, grooves 32D to 35D, and first and second joint joints 26D and 27D. In other words, the exterior wall panel 1A according to the first embodiment includes three first to third design portions 21A to 23A, whereas the exterior wall panel 1D according to this embodiment includes four first to fourth design portions 21D to 23D and 30D.

The first and second design portions 21D, 22D each have a first and second flat portion 211D, 221D and a first and second inclined portion 212D, 222D in a bottom-to-top direction, similar to the first to third design portions 21A-23A. In contrast, the third and fourth design portions 23D, 30D each have a third and fourth flat portion 231D, 301D and a third and fourth inclined portion 232D, 302D in a top-to-bottom direction, similar to the first and second design portions 21B, 22B (see FIG. 6). The inclined surfaces of the first and second inclined portions 212D, 222D and the third and fourth inclined portions 232D, 302D are flat.

Furthermore, the vertical width dimensions t60, t66 of the first and second flat portions 211D, 221D are set to be the same, and the vertical width dimensions t61, t67 of the first and second inclined portions 212D, 222D are also set to be the same. Therefore, the first design portion 21D and the second design portion 22D have the same shape.

Similarly, the vertical width dimensions t63, t65 of the third and fourth flat portions 231D, 301D are set to be the same, and the vertical width dimensions t62, t64 of the third and fourth inclined portions 232D, 302D are also set to be the same. Therefore, the third design portion 23D and the fourth design portion 30D have the same shape.

As described above, the exterior wall panel 1D has four first to fourth design sections 21D to 23D, 30D, and a third horizontal joint 31D is formed between the third design section 24D and the fourth design section 30D in the vertical direction.

Furthermore, horizontal V-grooves 32D, 33D with a V-shaped cross section are formed in the first and second flat portions 211D, 221D, and horizontal concave grooves 34D, 35D with a concave cross section are formed in the third and fourth flat portions 231D, 301D.

In this way, in the exterior wall panel 1D of this embodiment, when two exterior wall panels 1Da, 1Db are placed with their respective design surfaces 2Da, 2Db facing each other and the top and bottom of one exterior wall panel 1Db inverted relative to the top and bottom of the other exterior wall panel 1Da, the two exterior wall panels 1Da, 1Db are in contact with each other on four surfaces, so they are not easily displaced. Therefore, when the building boards placed in this manner are packed and the resulting package is transported or stored in a stacked state, the package is subjected to vibration and force, but the two exterior wall panels 1Da, 1Db are not easily displaced, so it is possible to reduce the occurrence of damage such as chipping caused by the transportation or storage of the package. Also, as described above, the portions where the flat parts and the inclined parts face each other do not abut each other, and a gap is formed, which absorbs pressure in the vertical direction and, as a result, prevents damage such as chipping of the building boards.

In addition, when two exterior wall panels 1Da, 1Dc are placed in such a manner that the back surface 3Dc of one exterior wall panel 1Dc is placed on the design surface 2Da of the other exterior wall panel 1Da, the first to fourth flat portions 211Da to 231Da, 301Da included in the first to fourth design portions 21Da to 23Da, 30Da of one exterior wall panel 1Da, respectively, come into face-to-face contact on four surfaces with the back surface 3Dc of the other exterior wall panel 1Dc. And because this face-to-face contact is by flat surfaces, adjacent exterior wall panels 1D are less likely to shift and are placed stably, so that the placement state can be prevented from collapsing even when multiple exterior wall panels 1D are placed.

Fifth Embodiment
As shown in Fig. 9, the exterior wall panel 1E according to the fifth embodiment of the present invention has a different design surface 2E from the exterior wall panel 1A according to the first embodiment. The design surface 2E of the exterior wall panel 1E includes first to third design portions 21E to 23E, first and second horizontal joints 24E, 25E, and a joining joint 26E.

The first to third design portions 21E to 23E each have a first to third flat portion 211E to 231E and a first to third inclined portion 212E to 232E in the bottom-to-top direction, similar to the first to third design portions 21A to 23A (see FIG. 2). The width dimension t74 of the third flat portion 231E is set to be wider than the width dimension t77 of the second flat portion 221E and narrower than the width dimension t71 of the first flat portion 211E. The width dimensions t72 and t78 of the first and second inclined portions 212E and 222E are set to be the same, and the width dimension 75 of the third inclined portion 232E is set to be wider than the dimensions t72 and t78. The size relationship of these dimensions does not differ between the exterior wall panel 1E and the exterior wall panel 1A. However, unlike the first and second horizontal joints 24A and 25A, the first and second horizontal joints 24E and 25E are each composed of a single inclined surface rising upward. In other words, the first and second horizontal joints 24E and 25E do not include inner bottom surfaces and inclined surfaces corresponding to the first and second inner bottom surfaces 242A and 252A and the first and second inclined surfaces 243A and 253A included in the first and second horizontal joints 24A and 25A. Therefore, the upper end of each inclined surface of the first and third inclined parts 212E and 232E is connected to the lower end of each inclined surface of the first and second horizontal joints 24E and 25E. The joint joint 26E is also composed of an inclined surface rising upward so that it has the same shape as the first and second horizontal joints 24E and 25E when two exterior wall panels 1E are joined vertically. Additionally, the inclined surfaces of the first to third inclined portions 212E to 232E are flat.

In this way, in the exterior wall panel 1E of this embodiment, when two exterior wall panels 1Ea, 1Eb are placed with their respective design surfaces 2Ea, 2Eb facing each other and the top and bottom of one exterior wall panel 1Eb are inverted relative to the top and bottom of the other exterior wall panel 1Ea, the two exterior wall panels 1Ea, 1Eb come into face-to-face contact with three inclined surfaces, just like the two exterior wall panels 1Aa, 1Ab, so the exterior wall panel 1E can also reduce the occurrence of damage such as chipping caused during transportation or storage of the package. Also, as described above, the portions where the flat portions and the inclined portions face each other do not abut each other, forming gaps, which absorb pressure in the vertical direction and, as a result, prevent damage such as chipping of the building panels.

In addition, when two exterior wall panels 1Ea, 1Ec are placed in such a manner that the back surface 3Ec of one exterior wall panel 1Ec is placed on the design surface 2Ea of the other exterior wall panel 1Ea, the first to third flat portions 211Ea to 231Ea included in the first to third design portions 21Ea to 23Ea of one exterior wall panel 1Ea and the back surface 3Ec of the other exterior wall panel 1Ec come into face-to-face contact at three flat surfaces, just like the two exterior wall panels 1Aa, 1Ac described above. This means that adjacent exterior wall panels 1E are unlikely to shift and are stably placed, so that the placement state can be prevented from collapsing even when multiple exterior wall panels 1E are placed.

Sixth Embodiment
In the exterior wall panel 1F according to the sixth embodiment of the present invention, the cross-sectional shapes of the first and second horizontal joints 24F, 25F are different from the cross-sectional shapes of the first and second horizontal joints 24A, 25A, compared to the exterior wall panel 1A according to the first embodiment. Figure 10 shows the cross-sectional shapes of the first and second horizontal joints 24F, 25F. However, as in Figure 4, Figure 10 shows a partial enlarged view of two exterior wall panels 1Fa, 1Fb placed in the manner shown in Figure 3, so the second horizontal joint 25Fb shown in Figure 10 is not the second horizontal joint 25Fa of the exterior wall panel 1Fa, but the second horizontal joint 25Fb of the exterior wall panel 1Fb with the exterior wall panel 1Fa turned backward. However, the cross-sectional shape of the second horizontal joint 25Fb is not different from the cross-sectional shape of the second horizontal joint 25Fa.

As shown in FIG. 10, the angle θ6 at which the first inclined surface 241Fa included in the first horizontal joint 24Fa rises upward from the first inner bottom surface 242Fa is set to be steeper than the angle θ3 (see FIG. 4) at which the first inclined surface 241Aa included in the first horizontal joint 24Aa rises from the first inner bottom surface 242Aa.

Similarly, the angle θ6 at which the second 1 inclined surface 251Fb included in the second horizontal joint 25Fb rises from the second inner bottom surface 252Fb is the same as the angle θ6 at which the first 1 inclined surface 241Fa included in the first horizontal joint 24Fa rises from the first inner bottom surface 242Fa, and is set steeper than the angle θ3 (see FIG. 4) at which the second 1 inclined surface 251Ab included in the second horizontal joint 25Ab rises from the second inner bottom surface 252Ab. In this embodiment, the angle θ6 is set to 90°.

As a result, as shown in FIG. 10, the distance between the first inclined surface 241Fa included in the first horizontal joint 24Fa and the second inclined surface 251Fb included in the second horizontal joint 25Fb is parallel as in the first embodiment, but the volume of the gap Gf is smaller than the volume of the gap Ga in FIG. 4. However, the effect of the gap Gf is the same as the effect of the gap Ga.

The present invention is not limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the present invention.
(1) In the above embodiments, the building board of the present invention is applied to an exterior wall board, but the application is not limited to this, and the building board of the present invention may be applied to an interior board. In addition, the building board of the present invention is not limited to a board made of a ceramic material, and may be a board made of metal such as metal siding, a concrete board, a wooden board, etc.
(2) In each of the above embodiments, the building board of the present invention is assumed to be laid horizontally, but the present invention is not limited to this and may be laid vertically.
(3) In each of the above embodiments, the heights of the joint bottoms in the thickness direction are the same, but this is not limited to the above and may be different.

1A to 1F...Outer wall board, 2A, 2B, 2D, 2E...Design surface, 3A, 3B, 3D, 3E...Back surface, 6A, 6B...Surface protrusion, 7A, 7B...Back surface protrusion, 11A...Top surface, 12A ...Lower surface, 13A...Right side, 14A...Left side, 21A, 21B, 21D, 21E...First design part, 22A, 22B, 22D, 22E...Second design part, 23A, 23D, 22E...Third design part , 24A, 24Aa, 24Ca, 24D, 24E, 24Fa...first side Joint, 24B... horizontal joint, 25A, 25Ab, 25Cb, 25D, 25E, 25Fb... second horizontal joint, 26A, 26B, 26D... first joint, 26E... joint, 27A, 27B, 27D... second joint , 30D...fourth design portion, 31D...third horizontal joint, 32D, 33D...horizontal V-groove, 34D, 35D...horizontal concave groove.

Claims (5)

A building board having a front surface and a back surface, and having a design surface on at least the front surface,
The surface comprises at least
A first design portion extending in a first direction;
a second design portion disposed in a second direction intersecting the first direction and extending in the first direction;
Equipped with
The first design portion is
A first flat portion having a flat surface extending in the first direction;
a first inclined portion inclined from an end of the first flat portion in the second direction toward the back surface with respect to the flat surface of the first flat portion;
Equipped with
The second design portion is
a second flat portion having a flat surface extending in the first direction;
a second inclined portion inclined from an end of the second flat portion in the second direction toward the back surface with respect to the flat surface of the second flat portion;
Equipped with
When the surfaces of the two building boards are placed such that the first design portion of one building board faces the second design portion of the other building board,
the first inclined portion of the first design portion and the second inclined portion of the second design portion are in surface contact with each other at least in part;
A building board, characterized in that a gap is formed between the first inclined portion and the second flat portion, and between the second inclined portion and the first flat portion, so that they are not in contact with each other. In the second direction, the length of the first design portion is 1.5 times or less the length of the second design portion.
2. The building board according to claim 1. In the second direction, the length of the first flat portion is 1.75 times or less than the length of the second flat portion.
3. The building board according to claim 2. The building board further comprises:
A recessed joint extends in the first direction and is connected to at least one of the first design portion and the second design portion in the second direction.
The building board according to any one of claims 1 to 3. At least one of the first design portion and the second design portion has one or more recessed portions formed therein.
The building board according to any one of claims 1 to 4.

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