Joint structure

Abstract

To provide a joint structure which has excellent waterproofness even without providing a sealant.SOLUTION: A joint structure 1 includes: a joint part 4 formed between building boards adjacent to each other in the left-to-right direction; and a fixture 6 for mounting the building board on a substrate of a building. The joint structure 1 further includes a dummy board member 3 arranged on the indoor side of the joint part 4. The dummy board member 3 is the member extending in the vertical direction, and has a water cutoff piece 31 at the position corresponding to both left and right sides of the joint part 4. The fixture 6 is arranged between the building board and the substrate of the building. The water cutoff piece 31 is formed across the entire length in the vertical direction of the dummy board member 3, and comes into contact with the indoor side surface of the building board without interfering with the fixture 6.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a joint structure. More specifically, the present invention relates to a joint structure including a sacrificial board member. [Background technology]

[0002] Patent Document 1 describes an exterior material mounting bracket equipped with an exterior material end fastening bracket. This exterior material mounting bracket supports and mounts an exterior material on the front (outdoor side) of a wall base, and is equipped with an exterior material upper end mooring part and two exterior material lower end mooring parts on the front surface of the exterior wall abutting surface. When the exterior material mounting bracket is viewed from the front, the two exterior material lower end mooring parts are located on both the left and right sides of the exterior material upper end mooring part.

[0003] The exterior material mounting bracket is disposed with its exterior wall abutment surface fixed to the front surface of the wall base. Four exterior materials are disposed in front of the exterior material mounting bracket. The four exterior materials are disposed side by side in the vertical and horizontal directions, with one corner of each exterior material being joined in front of the exterior material mounting bracket. Of the exterior materials adjacent in the vertical direction, the exterior material located at the top has its lower end hooked to the exterior material lower end mooring portion. Of the exterior materials adjacent in the vertical direction, the exterior material located at the bottom has its upper end hooked to the exterior material upper end mooring portion. Exterior materials adjacent in the horizontal direction are disposed with their side end faces facing each other.

[0004] In this way, the exterior material mounting bracket is arranged to straddle adjacent exterior materials in the left-right direction. The space between the opposing side end faces of the adjacent exterior materials in the left-right direction is formed as a joint. In order to prevent rainwater from entering the joint and improve waterproofing, it becomes necessary to provide a sealant. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5431761 Summary of the Invention [Problem to be solved by the invention]

[0006] However, with the joint structure formed as described above, there is a problem in that in order to improve waterproofing, it is time-consuming to provide a sealant in the joint portion.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide a joint structure that has excellent waterproofing properties even without the use of a sealant. [Means for solving the problem]

[0008] A joint structure according to one aspect of the present invention comprises a joint portion and a mounting fixture. The joint portion is formed between adjacent building boards in the left-right direction. The mounting fixture attaches the building board to the base of a building. The joint structure further comprises a waste board member. The waste board member is arranged on the indoor side of the joint portion. The waste board member is also a member extending in the vertical direction, and has a water stop piece at a position corresponding to both the left and right sides of the joint portion. The mounting fixture is arranged between the building board and the base of the building. The water stop piece is formed over the entire vertical length of the waste board member, and contacts the indoor side of the building board without interfering with the mounting fixture. Effect of the Invention

[0009] In the joint structure of the present invention, even if water such as rainwater penetrates the joint from the outdoor side to the indoor side, the water-stopping piece of the backsplash member stops the rainwater from spreading in the left and right directions and allows it to flow downward. Therefore, the joint structure of the present invention has excellent waterproofing properties even without providing a sealant in the joint. In addition, it is possible to prevent the design from being deteriorated by the sealant and to save the trouble of providing the sealant. [Brief description of the drawings]

[0010] [Figure 1] Fig. 1A is a plan view showing an example of a fitting used in a joint structure according to the present invention, and Fig. 1B is a front view of the same. [Diagram 2] Fig. 2A is a plan view showing a state in which a packing material is provided on the mounting tool of Fig. 1A, and Fig. 2B is a front view of the same. [Diagram 3] FIG. 3 is a cross-sectional view showing an embodiment of a joint structure according to the present invention. [Figure 4] FIG. 4 is a front view showing an embodiment of a joint structure according to the present invention. [Diagram 5] FIG. 5 is a front view showing an embodiment of a joint structure according to the present invention. [Figure 6] FIG. 6 is a cross-sectional view showing an embodiment of a joint structure according to the present invention. [Figure 7] Fig. 7A is a plan view showing a modified example of a fixture used in a joint structure according to the present invention, and Fig. 7B is a front view of the same. [Figure 8] FIG. 8 is a cross-sectional view showing a joint structure using the fixtures of FIGS. 7A and 7B. [Figure 9] Fig. 9A is a plan view showing a modified example of a fixture used in a joint structure according to the present invention, and Fig. 9B is a front view of the same. [Figure 10] FIG. 10 is a cross-sectional view showing a joint structure using the fixtures of FIGS. 9A and 9B. [Figure 11] Fig. 11A is a plan view showing a modified mounting fixture in which the mounting position of the packing is different from that of Fig. 2A, and Fig. 11B is a front view of the same. [Figure 12] Fig. 12A is a front view showing a modified example of a fixture used in a joint structure according to the present invention, and Fig. 12B is a plan view showing a portion AA in Fig. 12A. [Figure 13] Fig. 13A is a front view showing a portion AA in Fig. 12A, and Fig. 13B is a plan view showing the construction state of the same. [Figure 14] FIG. 14 is a front view showing a modified example of a fixture used in the joint structure according to the present invention. [Figure 15] Fig. 15A is a front view showing a modified example of a fixture used in a joint structure according to the present invention, and Fig. 15B is a front view showing the same in an installed state. [Figure 16]FIG. 16 is a perspective view of the same. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] (Embodiment 1) 1. Overview The joint structure 1 of this embodiment includes a joint portion 4, a mounting tool 6, and a scrap board member 3. The joint portion 4 is formed between adjacent building boards in the left-right direction. Here, when the joint structure 1 is formed on an exterior wall, an exterior material 2 is used as the building board. The mounting tool 6 attaches the exterior material 2 to a wall base 5, which is the base of a building. The scrap board member 3 is disposed on the indoor side of the joint portion 4. The scrap board member 3 is a member that extends in the vertical direction and has a water stop piece 31 at a position corresponding to both the left and right sides of the joint portion 4. The mounting tool 6 is disposed between the exterior material 2 and the wall base 5, that is, between the exterior material 2 and the scrap board member 3. The water stop piece 31 is formed over the entire length of the scrap board member 3 in the vertical direction, and contacts the indoor side of the exterior material 2 without interfering with the mounting tool 6. Here, "interference" refers to a state in which the water stop piece 31 is caught by the mounting tool 6 and does not contact the indoor side of the exterior material 2.

[0012] Usually, when rainwater infiltrates the joint 4 from the outdoor side to the indoor side, it may spread in the left-right direction along the mounting fixture 6 and the indoor side of the exterior material 2. On the other hand, in the joint structure 1 of this embodiment, the mounting fixture 6 is located between the water stop pieces 31, and the water stop pieces 31 contact the indoor side of the exterior material 2, so that the water stop pieces 31 of the backsplash member 3 can stop the rainwater from spreading in the left-right direction. In other words, in the joint structure 1 of this embodiment, even if rainwater infiltrates through the joint 4, it is difficult for the rainwater to infiltrate into the indoor side of the backsplash member 3, so there is no need to block the joint 4. Therefore, the joint structure 1 of this embodiment has excellent waterproofing properties even without providing a sealant in the joint 4, and there is no need to provide a sealant.

[0013] In this embodiment, the case where the exterior material 2 is used as the building board is illustrated, but the present invention is not limited to this, and an interior material can be used as the building board.

[0014] 2.Details The joint structure 1 of this embodiment includes an exterior material 2, a fixture 6, and a scrap board member 3. The exterior material 2, the fixture 6, and the scrap board member 3 are located in front of the wall base 5. In this embodiment, the front means the direction from the inside of the building to the outside. Moreover, the rear means the direction from the outside of the building to the inside. Moreover, the up side means the vertically upward direction, and the down side means the vertically downward direction. Moreover, the left side means the direction perpendicular to the front-to-back direction and the up-to-down direction, and means the direction toward the left when the joint structure 1 is viewed from the front. The right side means the direction perpendicular to the front-to-back direction and the up-to-down direction, and means the direction toward the right when the joint structure 1 is viewed from the front.

[0015] <Exterior material 2> The exterior material 2 is a member that constitutes the exterior wall of a building. In this embodiment, a ceramic siding material is used as the exterior material 2, but other siding materials such as metal siding materials can also be used. The ceramic siding material is a hardened product of a hydraulic material containing cement, aggregate, reinforcing fiber, water, etc.

[0016] The exterior material 2 is formed in a rectangular plate shape when viewed from the front (when viewed from the front). The exterior material 2 is formed to extend more in the left-right direction than in the up-down direction, and is horizontally long. The exterior wall of the building is formed by arranging a plurality of exterior materials 2 in the up-down direction and the left-right direction. Two exterior materials 2 adjacent in the up-down direction are connected by a tongue and groove joint. In this embodiment, various types of tongue and groove joints can be used, and for example, two exterior materials 2 adjacent in the up-down direction can be connected by a joint (see FIG. 6). In this case, a receiving part 21 is formed at the upper end of the exterior material 2 over the entire length in the left-right direction. Also, a real protrusion 22 is formed at the lower end of the exterior material 2 over the entire length in the left-right direction. Furthermore, a locking part 23 is formed at the lower end of the exterior material 2 over the entire length in the left-right direction. The locking part 23 has a vertical dimension shorter than the vertical dimension of the real protrusion 22, and is formed behind the real protrusion 22. Also, a groove part 24 is formed between the real protrusion 22 and the locking part 23 over the entire length in the left-right direction.

[0017] The front surface (outdoor side) of the exterior material 2 may be formed as a flat surface, or may have various patterns such as bumps and recesses. The front surface of the exterior material 2 is preferably painted. Furthermore, the rear surface (indoor side) of the exterior material 2 is preferably formed as a flat surface so that the water stop piece 31 described below can easily come into contact with it without any gaps. A water stop member 25 made of a hot melt agent or the like is provided on the front surface of the receiving portion 21 over the entire length in the left-right direction.

[0018] <Mounting fixture 6> 1A and 1B show a mounting fixture 6 used in this embodiment. The mounting fixture 6 is used to attach multiple exterior materials 2 to a wall substrate 5 of a building. The mounting fixture 6 may be made of metal or non-metal, but if it is made of metal, the mounting fixture 6 can be obtained by processing a metal plate such as a stainless steel plate by appropriately cutting and bending it. The mounting fixture 6 includes a fixing plate portion 61, a horizontal piece 62, and upper and lower support pieces 63.

[0019] The fixing plate portion 61 has a substantially rectangular shape in a front view, and is fixed to the wall base 5 of the building. The fixing plate portion 61 has fixing holes 611, 612. The fixing hole 611 penetrates the fixing plate portion 61 in the front-rear direction. The fixing hole 611 is provided at substantially the center of the fixing plate portion 61 in the left-right direction. The fixing hole 611 is provided above the horizontal piece 62. The fixing hole 612 penetrates the fixing plate portion 61 in the front-rear direction. The fixing hole 612 is located above the fixing hole 611, and multiple fixing holes 612 are provided lined up in the left-right direction at the top of the fixing plate portion 61. Fixing tools such as nails and screws can be inserted into the fixing holes 611, 612.

[0020] The fixing plate 61 is provided with a plurality of ribs 613. One of the plurality of ribs 613 is formed to extend in the left-right direction above the fixing hole 611. One of the plurality of ribs 613 is formed to extend in the up-down direction on both the left and right sides of the fixing hole 611. The rib 613 protrudes from the front surface of the fixing plate 61 to increase the strength of the fixing plate 61.

[0021] The horizontal piece 62 is formed to protrude forward from the fixed plate portion 61. The horizontal piece 62 protrudes forward from the lower end of the fixed plate portion 61. The horizontal piece 62 is formed in a generally plate shape extending in the left-right direction. The horizontal piece 62 is disposed inside the left and right ends of the fixed plate portion 61. In other words, the left-right dimension of the horizontal piece 62 is shorter than the left-right dimension of the fixed plate portion 61. Therefore, the left and right ends of the horizontal piece 62 do not protrude outside the left and right ends of the fixed plate portion 61.

[0022] A horizontal protrusion 66 is formed in the center of the horizontal piece 62 in the left-right direction. The horizontal protrusion 66 protrudes above the upper surface of the horizontal piece 62, and its upper portion is substantially flat. The horizontal protrusion 66 functions as a rib and increases the strength of the horizontal piece 62. As shown in FIG. 1A, a U-shaped slit is formed in the horizontal protrusion 66, and a receiving piece 67 is formed inside this slit. The receiving piece 67 is slightly inclined so that its tip faces forward and protrudes from the upper surface of the horizontal protrusion 66.

[0023] The upper and lower support pieces 63 are provided on the horizontal piece 62. The upper and lower support pieces 63 are provided on a plane (on a virtual substantially vertical plane) facing the fixed plate portion 61. In this embodiment, two upper and lower support pieces 63 are provided. The two upper and lower support pieces 63 are lined up in the left-right direction. The left upper and lower support piece 63 has a shorter left-right dimension than the right upper and lower support piece 63.

[0024] The upper and lower support pieces 63 are disposed outside both left and right ends of the fixed plate portion 61 and inside both left and right ends of the fixed plate portion 61 .

[0025] Each of the upper and lower support pieces 63 aligned in the left-right direction includes an upper support piece 631 and a lower support piece 632. The upper support piece 631 protrudes upward beyond the horizontal piece 62. The upper support piece 631 is formed continuously over the entire length of each of the upper and lower support pieces 63 in the left-right direction. The lower support piece 632 protrudes downward beyond the horizontal piece 62. Two lower support pieces 632 are provided on each of the upper and lower support pieces 63.

[0026] That is, the left end of the left upper and lower support piece 63 protrudes leftward (outward) than the left end of the fixed plate part 61. The right end of the left upper and lower support piece 63 is located to the right (inner) of the left end of the fixed plate part 61 and slightly leftward of the center in the left-right direction of the fixed plate part 61. The left upper support piece 631 is formed so as to be continuous from one end to the other end in the left-right direction, so that its strength can be increased compared to when it is divided in the left-right direction.

[0027] The left upper and lower support piece 63 has lower support pieces 632 at the left and right ends. The left lower support piece 632 is located to the left (outside) of the left end of the fixed plate part 61. The right lower support piece 632 is located to the right (inside) of the left end of the fixed plate part 61, and is located approximately in the center of the fixed plate part 61 in the left-right direction. Since the lower support piece 632 is thus formed at one end and the other end in the left-right direction, it is easier to engage the exterior material 2 compared to a case in which both the upper support piece 631 and the lower support piece 632 are continuous in the left-right direction.

[0028] The right end of the right upper and lower support piece 63 protrudes to the right (outside) further than the right end of the fixed plate part 61. The left end of the right upper and lower support piece 63 is located to the left (inside) further than the right end of the fixed plate part 61, and is located approximately in the center of the fixed plate part 61 in the left-right direction.

[0029] The right-side upper and lower support piece 63 has lower support pieces 632 provided at the left and right ends. The right-side lower support piece 632 is located to the right (outside) of the right end of the fixed plate part 61. The left-side lower support piece 632 is located to the left (inside) of the right end of the fixed plate part 61, and is located approximately in the center in the left-right direction of the fixed plate part 61. Since the lower support piece 632 is thus formed at one end and the other end in the left-right direction away from each other, it is possible to easily engage the exterior material 2.

[0030] In the mounting tool 6, among the upper and lower support pieces 63 arranged in the left-right direction, each upper support piece 631 is formed so as to continue from one end to the other end in the left-right direction, but it is sufficient that at least one of the upper support piece 631 and the lower support piece 632 of the upper and lower support piece 63 is formed so as to continue from one end to the other end in the left-right direction. Therefore, the lower support piece 632 of the upper and lower support pieces 63 may be formed so as to continue from one end to the other end in the left-right direction.

[0031] The sum of the widths in the left-right direction of the right-side and left-side upper and lower support pieces 63 is preferably greater than 1 and less than 3 times the width of the fixing plate part 61 in the left-right direction, more preferably 1.3 to 2.5 times, and even more preferably 1.5 to 2.2 times. In this way, the sum of the widths in the left-right direction of the right-side and left-side upper and lower support pieces 63 is formed to be greater than 1 time the width of the fixing plate part 61 in the left-right direction, so that the upper support piece 631 and the lower support piece 632 of the upper and lower support pieces 63 engage with the exterior material 2 over a wide range in the left-right direction. This makes it possible to increase the strength with which the mounting tool 6 supports the exterior material 2. In addition, the sum of the widths in the left-right direction of the right-side and left-side upper and lower support pieces 63 is formed to be less than 3 times the width of the fixing plate part 61 in the left-right direction, so that the fixing plate part 61 and the horizontal piece 62 can fully support the force applied to the right-side and left-side upper and lower support pieces 63 and the left-side upper and lower support pieces 63. This makes it possible to prevent the fixed plate portion 61 and the horizontal piece 62 from being deformed, or the upper and lower support pieces 63 themselves from being deformed, due to forces applied to the right-side and left-side upper and lower support pieces 63.

[0032] In addition, a regulating piece 64 is formed at the left end of the right upper and lower support piece 63. The regulating piece 64 is located forward (outdoor side) of the fixed plate part 61. Specifically, the regulating piece 64 is formed by bending vertically forward from the left end of the right upper support piece 631. The regulating piece 64 is formed in a flat plate shape perpendicular to the left-right direction. The regulating piece 64 is located in front of the approximate center in the left-right direction of the fixed plate part 61, and is disposed in front of the fixing hole 611, and is disposed in the joint part 4 consisting of a gap formed between the exterior materials 2 adjacent in the left-right direction in the construction state. In addition, the vertical dimension of the regulating piece 64 is the same as the vertical dimension of the upper support piece 631. The gap between the right upper and lower support piece 63 and the left upper and lower support piece 63 is generated by cutting and forming the regulating piece 64.

[0033] As shown in FIG. 2A and FIG. 2B, each upper support piece 631 is provided with a packing material 7. The packing material 7 is formed to be elastically deformable, and can be formed of a material such as EPDM rubber foam. The packing material 7 is provided so as to be continuous from the front surface (outdoor side) to the rear surface (indoor side) of the upper support piece 631 of each upper and lower support piece 63. In this case, the packing material 7 can be attached to the upper support piece 631 with double-sided tape or the like. By providing the packing material 7 to each of the left and right upper and lower support pieces 63, the packing material 7 is disposed on both the left and right sides of the regulating piece 64. That is, the regulating piece 64 is located between the two packing materials 7. The packing material 7 is also located above the inner lower support piece 632 of each upper and lower support piece 63.

[0034] The mounting tool 6 further includes abutment pieces 68. The abutment pieces 68 are provided at both the left and right ends of the mounting tool 6. The two abutment pieces 68 are formed to protrude outward from the left end or the right end of the fixing plate portion 61. The two abutment pieces 68 are also formed to extend downward from the upper end of the fixing plate portion 61. The lower ends of the two abutment pieces 68 are located below the horizontal piece 62, and the lower ends of the two abutment pieces 68 are connected by a connecting portion 69. An opening 71 is formed between the fixing plate portion 61 and the connecting portion 69. The abutment pieces 68 are provided at both the left and right ends of the mounting tool 6, thereby improving the strength of the fixing plate portion 61. The abutment pieces 68 also form a gap between the fixing plate portion 61 and the exterior material 2. For this reason, the heads of fasteners such as nails and screws for fixing the fixing plate portion 61 fit into the gaps formed by the abutment pieces 68, and therefore can be prevented from coming into contact with the exterior material 2 and interfering with the exterior material 2. Furthermore, by increasing the dimension of the abutment piece 68 that protrudes from the fixed plate portion 61 side toward the outdoor side, a sufficient ventilation space can be formed between the wall base 5 and the exterior material 2.

[0035] <Scrapboard material 3> The waste board member 3 is used to ensure the water-stopping property of the joint structure 1 of this embodiment. The waste board member 3 is a member extending in the vertical direction, and is formed with water-stopping pieces 31 on the left and right. Specifically, the waste board member 3 includes a flat board-shaped base portion 30 and water-stopping pieces 31 protruding forward from both the left and right ends of the base portion 30. The two water-stopping pieces 31 are formed over the entire length of the base portion 30 in the vertical direction. The two water-stopping pieces 31 are also arranged opposite each other in the horizontal direction. The base portion 30 is formed of resin, rubber, metal, or the like. The water-stopping pieces 31 are formed of an elastic body (material that can be elastically deformed) such as rubber or soft resin so that they can contact (preferably adhere to) the indoor side surface of the exterior material 2 in the installed state. In addition, the water-stopping pieces 31 are not limited to being formed of an elastic body in their entirety, and only the part that contacts the indoor side surface of the exterior material 2 may be formed of an elastic body. Further, the water stop piece 31 is formed on each of the left and right ends of the base plate portion 30, but is not limited thereto, and multiple pieces may be formed on each of the left and right ends of the base plate portion 30. This further blocks the movement of water in the left and right directions that has entered through the joint portion 4 by the water stop piece 31, improving waterproofing.

[0036] <Joint structure 1> The joint structure 1 of this embodiment has the following structure.

[0037] The scrap board member 3 is attached to a wall base 5. Examples of the wall base 5 include building pillars, partitions, vertical furring strips, horizontal furring strips, structural panels, etc. When attaching the scrap board member 3 to the wall base 5, the rear surface (indoor side) of the base portion 30 can be attached to the front surface (outdoor side) of the wall base 5 with double-sided tape or the like.

[0038] The fixture 6 is disposed on the front surface of the base plate portion 30 of the scrap board member 3. In this case, the dimension in the left-right direction of the fixed plate portion 61 of the fixture 6 is smaller than the distance between the two water stop pieces 31 arranged in the left-right direction. The distance between the abutment pieces 68 provided at both the left and right ends of the fixture 6 is smaller than the distance between the two water stop pieces 31 arranged in the left-right direction. Therefore, the fixture 6 can be disposed without interfering with the left and right water stop pieces 31, and the fixed plate portion 61 of the fixture 6 and the two abutment pieces 68 are disposed between the two water stop pieces 31. Then, with the rear surface of the fixed plate portion 61 of the fixture 6 in contact with the front surface of the base plate portion 30, a fastener such as a nail or a screw is inserted into the fixing holes 611, 612 and driven into the wall base 5, thereby fixing the fixed plate portion 61 to the wall base 5, and the fixture 6 can be attached via the scrap board member 3.

[0039] The exterior material 2 is attached to the wall base 5 by the mounting fixture 6. In this case, the upper end of the exterior material 2 is hooked onto the lower support piece 632 of the mounting fixture 6 at the receiving part 21, as shown in Figures 4, 5, and 6. That is, the lower support piece 632 is disposed in front of the receiving part 21, and the abutment piece 68 comes into contact with the rear surface (indoor side) of the exterior material 2, so that the upper end of the exterior material 2 is hooked onto and held by the mounting fixture 6.

[0040] The fixing plate portion 61 of the mounting fixture 6 is formed to a size that allows it to be arranged inside the left and right water stop pieces 31 of the waste board member 3, and the horizontal piece 62 of the mounting fixture 6 is arranged inside the left and right ends of the fixing plate portion 61. Therefore, the fixing plate portion 61 and the horizontal piece 62 do not interfere with the water stop piece 31. Here, the upper support piece 631 and the lower support piece 632 are both arranged at a position corresponding to the outer side of the left and right water stop pieces 31 of the waste board member 3 and a position corresponding to the inner side of the left and right water stop pieces 31 of the waste board member 3. In other words, the upper support piece 631 and the lower support piece 632 engage with the exterior material 2 in a range wider left and right than the fixing plate portion 61. Therefore, the mounting fixture 6 can increase the support strength of the exterior material 2 while forming the fixing plate portion 61 small and not interfering with the water stop piece 31.

[0041] 5 and 6, the upper support piece 631 of the mounting fixture 6 is inserted into the groove 24 of the exterior material 2, and the lower end of the exterior material 2 is hooked to the locking portion 23. That is, the upper support piece 631 is arranged in front of the locking portion 23, and the abutment piece 68 comes into contact with the rear surface (indoor side) of the exterior material 2, so that the lower end of the exterior material 2 is hooked and held by the mounting fixture 6. The packing material 7 provided on the upper support piece 631 is arranged from the outdoor surface of the upper support piece 631 to the outdoor surface of the fixing plate portion 61. That is, the packing material 7 is arranged not only in the groove portion 24, but also between the upper surface of the horizontal piece 62 and the lower surface of the locking portion 23 from the outdoor surface of the upper support piece 631 to the outdoor surface of the fixing plate portion 61. At this time, the packing material 7 is in close contact with the inner surface of the groove portion 24 (the rear surface of the actual protrusion 22 and the front surface of the locking portion 23) and between the horizontal piece 62 and the locking portion 23. This breaks the left-right continuity on the receiving portion 21, making it difficult for rainwater to move laterally on the receiving portion 21 of the lower exterior material 2, i.e., so-called lateral running of rainwater.

[0042] The packing material 7 is provided on the left and right sides of the horizontal piece 62 so as to sandwich the left-right center of the horizontal piece 62. The left-right position of the packing material 7 may be provided at a position corresponding to the position where the lower support piece 632 is provided, as shown in Fig. 2. In this case, the packing material 7 can block the lateral flow of rainwater over a wide range in both directions. The packing material 7 may also be provided at a position corresponding to a position where the lower support piece 632 is not provided, as shown in Figs. 11A and 11B.

[0043] In this way, of the exterior materials 2 adjacent in the vertical direction, the lower end of the upper exterior material 2 engages with the upper support piece 631, the upper end of the lower exterior material 2 engages with the lower support piece 632, and further, by arranging the actual protrusion 22 of the upper exterior material 2 in front of the receiving actual part 21 of the lower exterior material 2 and the upper and lower support pieces 63, two exterior materials 2 adjacent in the vertical direction can be actually joined and installed. Here, the upper and lower support pieces 63 are arranged outside both the left and right ends of the fixing plate part 61 and inside both the left and right ends of the fixing plate part 61, so that a wide range in the left and right direction of the exterior material 2 engages with the upper and lower support pieces 63. Therefore, the mounting fixture 6 can support the exterior material 2 and withstand wind pressure even in windy places on the upper floors of a building.

[0044] Also, as shown in FIG. 3, the exterior materials 2 are arranged next to each other in the left-right direction. In this case, the mounting fixture 6 is arranged across two exterior materials 2 adjacent to each other in the left-right direction. That is, one mounting fixture 6 is provided so as to span both of the two exterior materials 2 adjacent to each other in the left-right direction. Therefore, of the two exterior materials 2 adjacent to each other in the left-right direction, the left exterior material 2 is held by the left upper and lower support pieces 63, and the right exterior material 2 is held by the right upper and lower support pieces 63. Also, of the two exterior materials 2 adjacent to each other in the left-right direction, the left end face of the right exterior material 2 and the right end face of the left exterior material 2 are arranged opposite each other. Therefore, a joint portion 4 extending in the up-down direction is formed between the two exterior materials 2 adjacent to each other in the left-right direction. Also, a regulating piece 64 is located in the joint portion 4, and the regulating piece 64 is in contact with or in close proximity to the left end face of the right exterior material 2 and the right end face of the left exterior material 2. Therefore, the exterior material 2 comes into contact with the restricting piece 64 and becomes less likely to move in the left-right direction, and the exterior material 2 becomes less likely to shift in position in the left-right direction.

[0045] As described above, a plurality of exterior materials 2 are arranged and installed in the vertical and horizontal directions to form the exterior wall of a building. At this time, at least in the joints 4, the corners of the four exterior materials 2 are held by one fixture 6. The fixture 6 is disposed between the exterior materials 2 and the waste board member 3, and the fixing plate portion 61 of the fixture 6 is positioned between the two water stop pieces 31 of the waste board member 3. Furthermore, the waste board member 3 is positioned behind the joints 4 (on the indoor side), and the water stop pieces 31 of the waste board member 3 come into contact with the rear surface of the exterior material 2 (on the indoor side) without being interfered with by the fixture 6.

[0046] The joint structure 1 thus formed has excellent waterproofing properties even without providing a sealant in the joint 4. In other words, if no sealant is provided in the joint 4, rainwater will penetrate the joint 4 from the front (outdoor side) and reach the rear surface of the mounting fixture 6 and the exterior material 2 through the joint 4. However, when the rainwater reaches the rear surface of the mounting fixture 6 and the exterior material 2 and tries to flow in the left-right direction, it hits the water stop piece 31 and is blocked, making it difficult to flow further outward (further to the right of the right water stop piece 31, or further to the left of the left water stop piece 31). Then, the rainwater flows downward along the base plate 30 and the water stop piece 31 and is drained. Therefore, the rainwater is less likely to penetrate indoors than the scrap board member 3, improving the waterproofing properties of the exterior wall.

[0047] 3. Variations The first embodiment is merely one of various embodiments of the present disclosure. The first embodiment can be modified in various ways depending on the design and the like as long as the object of the present disclosure can be achieved.

[0048] The mounting fixture 6 in the first embodiment includes two upper and lower support pieces 63 aligned in the left-right direction, but is not limited to this and may include one upper and lower support piece 63. In this case, the inner ends of the two upper and lower support pieces 63 in the first embodiment are connected to each other.

[0049] The mounting fixture 6 in the first embodiment is composed of one member, but may be composed of two or more members (not shown) without being limited to this. For example, the mounting fixture 6 may be composed of two members in the left-right direction, such as by dividing the mounting fixture 6 at the center in the left-right direction. In this case, the right mounting fixture has a right upper and lower support piece 63, and the left mounting fixture has a left upper and lower support piece 63. In this way, since the mounting fixture has only the right or left upper and lower support pieces 63, it can be applied to places such as corners.

[0050] Also, a mounting fixture 601 as shown in FIG. 7A, FIG. 7B, and FIG. 8 may be used. The right and left halves of the mounting fixture 601 are formed approximately symmetrically with respect to the abutting piece 68. The mounting fixture 601 has four upper and lower support pieces 63 arranged in the left-right direction. The two upper and lower support pieces 63 in the right half of the mounting fixture 601 and the two upper and lower support pieces 63 in the left half of the mounting fixture 601 are formed approximately symmetrically with respect to the abutting piece 68. The upper and lower support pieces 63 located outside the left and right ends of the fixing plate part 61 are formed to be supported by the support parts 72 located outside the abutting piece 68. In this case, the upper and lower support pieces 63 located outside the left and right ends of the fixing plate part 61 are strongly supported by the horizontal pieces 62 and the support parts 72, improving the mounting strength of the exterior material 2. Furthermore, the horizontal pieces 62 and the support parts 72 on the right and left ends of the fixture 601 are each partially unformed, and have a space 721 recessed from the indoor side toward the outdoor side. This allows the water stop piece 31 of the scrap board member 3 to enter the space 721, as shown in FIG. 8. Therefore, the water stop piece 31 of the scrap board member 3 can be installed in contact with the indoor side of the exterior material 2 without being interfered with by the fixture 601. Furthermore, of the upper and lower support pieces 63, the upper support piece 631 near the center is partially formed shorter in the upward direction. This makes it less likely that the upper support piece 631 will block the fixing hole 611, making it easier to insert fixing tools such as nails and screws.

[0051] In addition, in the mounting fixture 6 of the first embodiment, the upper and lower support pieces 63 are arranged outside both the left and right ends of the fixing plate portion 61 and inside both the left and right ends of the fixing plate portion 61, but this is not limited thereto. For example, a mounting fixture 602 as shown in Figs. 9A, 9B and 10 may be used. In the mounting fixture 602, the upper and lower support pieces 63 are not arranged outside both the left and right ends of the fixing plate portion 61, but are arranged only inside both the left and right ends of the fixing plate portion 61. In this case, the upper and lower support pieces 63 are formed short in the left and right direction, so that the mounting fixture 602 is easy to manufacture, and for example, the upper and lower support pieces 63 can be formed from the parts cut and raised to form the opening 71.

[0052] 10, the upper support piece 631, the lower support piece 632 and the horizontal piece 62 are all located inside (between) the left and right water stop pieces 31 of the throw-away board member 3. The left and right water stop pieces 31 of the throw-away board member 3 are also located outside the upper support piece 631, the lower support piece 632 and the horizontal piece 62, and are not in contact with or interfering with the mounting fixture 602.

[0053] Furthermore, a mounting fixture 603 as shown in Figs. 12A, 12B, 13A, and 13B may be used. The mounting fixture 603 is formed as a metal fitting that is long in the left-right direction. The mounting fixture 603 has a long rear panel 91, and at the portion corresponding to the water stop piece 31 of the mounting fixture 603, a plurality of portions of the rear panel 91 located between slits 910 in which the rear panel 91, the abutment piece 68, and the horizontal piece 62 are not formed partly or entirely from the rear panel 91 to the vicinity of the upper and lower support pieces 63 function as the fixing plate portion 61. That is, the long mounting fixture 603 has a plurality of fixing plate portions 61 of the rear panel 91 fixed to a plurality of wall bases 5 (vertical furring strips) so as to span a plurality of wall bases 5 (vertical furring strips), and is fixed at a portion where the indoor side of the fixing plate portion 61 contacts the wall base 5. As a result, even if the mounting fixture 603 is installed in front of the water stop piece 31, the water stop piece 31 does not interfere with the mounting fixture 603. Furthermore, since the mounting fixture 603 has a shape that is continuous in the left-right direction and can hold the exterior material 2 over a wide area, the mounting strength of the exterior material can be improved.

[0054] In this modified example, only the lower support piece 632 of the upper and lower support pieces 63 is provided between the left and right water stop pieces 31 of the waste board member 3, but the present invention is not limited to this and a configuration in which only the upper support piece 631 is provided, or multiple support pieces such as the upper support piece 631 and the lower support piece 632, may be provided. In addition, since the mounting fixture 603 extends in the left-right direction, the exterior material 2 can be held in places other than the joint portion 4, further improving the mounting strength of the exterior material 2.

[0055] In addition, in the mounting fixture 603, the water stop piece 31 of the backing board member 3 is placed in a slit 910 provided in the rear panel 91. This allows the mounting fixture 603 to be attached to the wall base 5 without interference from the water stop piece 31. Also, a packing (not shown) is provided on the horizontal piece 62 between the upper and lower support pieces 63 and the rear panel 91, which makes it possible to prevent water from running sideways.

[0056] The mounting tool may also be configured with a set of two identical members in the left-right direction as shown in Fig. 14. For example, a conventional mounting tool can be used as mounting tool half body 6040, which are the two members that configure mounting tool 604. Each mounting tool half body 6040 includes a fixed plate portion 61, a horizontal piece 62, and upper and lower support pieces 63. The upper and lower support pieces 63 include an upper support piece 631 and a lower support piece 632. Furthermore, one water stop piece 31 is located further to the left of the left mounting tool half body 6040, and another water stop piece 31 is located further to the right of the right mounting tool half body 6040.

[0057] Furthermore, when using the mounting fixture 604, the portion of the waste board member 3 other than the water stop piece 31 (base plate portion 30) can be made from a hard material (metal, plastic, etc.) to make it less likely to deform, allowing the waste board member 3 to be formed with a wide width. As a result, even if the waste board member 3 protrudes from the furring strip in the left-right direction, the water stop piece 31 can be abutted against the back surface of the exterior material 2, so the mounting fixture halves 6040 can be used lined up in the left-right direction. Furthermore, since two mounting fixture halves 6040 are lined up side by side, the exterior material 2 is held by the upper and lower support pieces 63 that are twice as long left-right as when the exterior material 2 is held by a single member, and this further improves the mounting strength of the exterior material 2.

[0058] Also, the mounting fixture 605 may be composed of, for example, a plurality of upper and lower support piece members 630 as shown in FIG. 15A, and a long fixed plate member 610 extending in the vertical direction as shown in FIG. 15B. The long fixed plate member 610 has a fixed plate portion 61 fixed to the wall base 5. The fixed plate portion 61 is provided with a plurality of slits 614 arranged in the vertical direction. The slits 614 are formed penetrating the fixed plate portion 61 in the front-rear direction. The upper and lower support piece members 630 are formed by providing locking portions 633 on the upper and lower support pieces 63. The locking portions 633 are formed in a substantially L-shape, and protrude rearward and downward from the upper and lower support pieces 63.

[0059] After the fixed plate member 610 is attached to the wall base 5, multiple upper and lower support pieces 630 are attached to the fixed plate member 610 as necessary. In this case, the locking parts 633 are inserted from the front into the slits 614 to be hooked. This makes installation easier as it eliminates the need to align the upper and lower support pieces 630 one by one while installing them.

[0060] In all the above-mentioned modified examples, a packing material 7 (not shown) may be provided as in the first embodiment. This blocks the left-right continuity on the receiving portion 21, and makes it difficult for rainwater to move laterally on the receiving portion 21 of the lower exterior material 2, that is, so-called lateral running of rainwater.

[0061] Furthermore, in the first embodiment and all the above-mentioned modified examples, the case of use on exterior walls has been described, but this is not limited to this, and the material may be used, for example, on the interior walls of an atrium in a large facility or an indoor pool, and in the case of interior walls, it is particularly suitable for use in locations that are susceptible to the effects of rainwater and plumbing equipment.

[0062] (summary) As described above, the joint structure 1 according to the first embodiment includes a joint portion 4 formed between adjacent building boards (exterior materials 2) in the left-right direction, and a fixture 6 for attaching the building boards (exterior materials 2) to the base of a building (wall base 5). The joint structure 1 further includes a waste board member 3 arranged on the indoor side of the joint portion 4. The waste board member 3 is a member extending in the vertical direction, and has water stop pieces 31 at positions corresponding to both the left and right sides of the joint portion 4. The fixture 6 is arranged between the building board (exterior materials 2) and the base of the building (wall base 5). The water stop pieces 31 are formed over the entire vertical length of the waste board member 3, and come into contact with the indoor side of the building board (exterior materials 2) without interfering with the fixture 6.

[0063] According to this embodiment, even if water such as rainwater seeps into the joint portion 4 from the outdoor side to the indoor side, the water-stopping piece 31 of the backsplash member 3 can stop the rainwater from spreading in the left and right directions and allow it to flow downward, so that the joint structure 1 has excellent waterproofing properties even without providing a sealant in the joint portion 4. In addition, it is possible to prevent the design from being deteriorated by the sealant and to save the effort of providing the sealant.

[0064] The second aspect is the joint structure 1 according to the first aspect, and the mounting tool 6 is disposed between the building board (exterior material 2) and the scrap board member 3, and includes a fixed board portion 61 located between the water-stopping pieces 31 and fixed to the base (wall base 5) of the building, a horizontal piece 62 protruding forward from the fixed board portion 61, and upper and lower support pieces 63 provided at the front end of the horizontal piece 62. The upper and lower support pieces 63 include an upper support piece 631 protruding upward from the horizontal piece 62, and a lower support piece 632 protruding downward from the horizontal piece 62. The upper support piece 631 engages with the lower end of the upper building board (exterior material 2) among the building boards (exterior material 2) adjacent in the vertical direction. The lower support piece 632 engages with the upper end of the lower building board (exterior material 2) among the building boards (exterior material 2) adjacent in the vertical direction. The upper support piece 631 and the lower support piece 632 are both disposed at a position corresponding to the outer side and the inner side of the left and right water stop pieces 31 of the throw-away board member 3 .

[0065] According to this embodiment, the upper and lower support pieces 63 can engage with the exterior material 2 over a wide range in the left-right direction, and the mounting fixture 6 can support the exterior material 2 and withstand wind pressure even in windy locations on the upper floors of a building.

[0066] The third aspect is the joint structure 1 according to the second aspect, in which the horizontal piece 62 is disposed inside the left and right water stop pieces 31.

[0067] According to this embodiment, the horizontal piece 62 does not come into contact with the water-stopping piece 31 of the waste board member 3 and does not push it down in the left-right direction, so the function of the waste board member 3 to block water and flow it downward is not impaired.

[0068] The fourth aspect is the joint structure 1 according to the second aspect, and the mounting tool 6 includes an elastically deformable packing material 7. The packing material 7 is provided so as to be continuous from the outdoor side surfaces of the upper and lower support pieces 63 to the outdoor side surface of the fixing plate portion.

[0069] According to this embodiment, rainwater that has entered from the outdoor side of the joint portion 4 to the indoor side flows left and right through the gaps between the connecting parts of the exterior materials 2 that are adjacent in the vertical direction; this is called the lateral flow of water, which is restricted by the gasket material 7, thereby further improving waterproofing.

[0070] The fifth aspect is the joint structure 1 according to any one of the first to fourth aspects, in which the mounting tool 6 has a restricting piece 64. The restricting piece 64 is disposed in the joint portion 4.

[0071] According to this embodiment, the right end or the left end of the building boards (exterior materials 2) adjacent in the left-right direction abuts against the restricting piece 64, so that the building boards (exterior materials 2) are less likely to shift in position in the left-right direction. [Explanation of symbols]

[0072] 1 Joint structure 2 Exterior material (building board) 3 Scrap board material 31 Water stop piece 4 Joint 5. Wall foundation (building foundation) 6,601,602,603,604,605 ​​Mounting fixtures 61 Fixed plate part 62 horizontal piece 63 Vertical support piece 631 Upper support piece 632 Lower support piece 64 Regulatory piece 7 Packing material

Claims

1. A joint portion formed between adjacent building boards in the left-right direction; A fitting for attaching the building board to a base of a building, Further provided is a scrap board member arranged on the indoor side of the joint portion, The waste board member is a member extending in the vertical direction and has water-stopping pieces at positions corresponding to both the left and right sides of the joint portion, The fixture is disposed between the building board and the foundation of the building, The water stop piece is formed over the entire vertical length of the scrap board member and contacts the indoor side surface of the building board without interfering with the mounting fixture. Joint structure.

2. The mounting fixture includes: A fixed plate portion is disposed between the building board and the waste board member, and is located between the water stop pieces and fixed to the foundation of the building; A horizontal piece protruding forward from the fixed plate portion; and upper and lower support pieces provided on the horizontal piece, The upper and lower support pieces are An upper support piece that protrudes upward from the horizontal piece; A lower support piece protruding downward from the horizontal piece, The upper support piece engages with a lower end portion of the upper building board among the building boards adjacent in the vertical direction, The lower support piece engages with an upper end of the lower building board among the building boards adjacent in the vertical direction, The upper support piece and the lower support piece are both disposed at a position corresponding to the outer side and the inner side of the water stop pieces on the left and right sides of the waste board member. The joint structure according to claim 1.

3. The horizontal piece is disposed on the inside of the left and right water stop pieces. The joint structure according to claim 2.

4. The mounting tool includes an elastically deformable packing material, The packing material is provided so as to be continuous from the outdoor surface of the upper support piece to the outdoor surface of the fixing plate portion. The joint structure according to claim 2.

5. The mounting tool has a restricting piece, The regulating piece is disposed in the joint portion. The joint structure according to any one of claims 1 to 4.

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