JP2024104526A - Wall fittings and joint construction - Google Patents

Abstract

[Problem] To improve the design of the entire wall, improve the waterproofing of the joints, and improve workability in wall accessories and wall joint structures. [Solution] A base material is fixed to a wall base, and a cover material that covers the gap between the end faces of wall panels supported on the wall base. The base material has a first back support piece, a second back support piece, and an engagement groove. The cover material has a first cover part, a second cover part, a central cover part that is provided between the first cover part and the second cover part and is interposed in a state of being immersed in the gap, and an engagement piece that is provided on the inner surface of the central cover part and is inserted and engaged in the engagement groove. The engagement piece has a leg part that extends in the cover length direction along the inner surface of the central cover part and is formed to protrude toward the base material side, and a claw part that is provided at the tip of the leg part and engages with the engagement groove. The engagement groove has an opening into which the leg part can be inserted, and an engagement protrusion that protrudes along the inner edge of the opening and engages and holds the claw part. [Selected Figure] Figure 3

Description

The present invention relates to wall accessories installed in the joints of building walls, and to wall joint structures.

When installing wall panels on the walls of buildings such as detached houses and commercial facilities, wall accessories have been proposed that can be attached along the joints between two adjacent wall panels (for example, Patent Document 1).

The wall accessory in Patent Document 1 consists of a joint material and a joint material holder, and is attached by attaching the joint material to the joint material and fitting it into the joint between the wall panels from the outside. In detail, the joint material has a generally flat joint cover part that is wider than the gap (joint width) between the wall panels, and a narrow plate-like insertion part that protrudes along the center of the inside of the joint cover part. Meanwhile, the joint material holder has a fitting part with a U-shaped cross section and a pair of holding parts that protrude outward in the joint width direction from the base end (arc part) of the fitting part, and is connected to the joint material by fitting and inserting the insertion part of the joint material into the fitting part. In this state, the joint material is fixed by pushing the joint material holder into the gap between the wall panels and engaging it with the inside of the wall panel.

JP 2007-9620 A

However, the wall accessory in Patent Document 1 has a joint cover formed as a flat plate wider than the gap, so when attached to the joint as described above, the joint material has a large presence, which causes a problem of impairing the design of the wall as a whole. In addition, when twisting or bending stress is applied to the joint material, the joint cover is likely to deform or warp, which may further impair the design of the entire wall, and depending on the degree of deformation or warping, it may not be possible to seal the gap in a watertight manner.

Furthermore, when the joint cover is formed flat and without any irregularities, as in the wall accessory in Patent Document 1, the construction worker cannot accurately recognize the position of the engagement part (joint material holder) provided on the inside of the joint material from the outside of the joint cover, so when pushing the joint material into the gap with his or her fingers, the pushing direction is easily shifted, which causes the construction to be unable to be carried out smoothly.

The present invention was made in consideration of the above problems, and aims to improve the overall design of the wall, improve the waterproofing of the joints, and improve workability in wall accessories installed in the joints of building walls and in the wall joint structure.

To solve the above problems, the wall accessories and wall joint structure of the present invention incorporate the following technical measures.

The present invention is a wall accessory provided at a joint of a wall of a building, comprising: a base material fixed to a wall base; and a cover material covering a gap between butted end faces of a pair of wall panels supported on the wall base, the base material comprising a first back support piece provided between a first wall panel of the wall panels and the wall base, a second back support piece provided between a second wall panel of the wall panels and the wall base, and a cover material provided between the first back support piece and the second back support piece,
and an engagement groove for engaging and holding the cover material, the cover material having a first cover portion arranged along the outer surface of the first wall panel, a second cover portion arranged along the outer surface of the second wall panel, a central cover portion provided between the first cover portion and the second cover portion and interposed in a state of being immersed in the gap, and an engagement piece provided on the inner surface of the central cover portion and inserted and engaged in the engagement groove, the engagement piece having a leg portion extending in the cover length direction along the inner surface of the central cover portion and protruding toward the base material, and a claw portion provided at the tip of the leg portion and engaging with the engagement groove of the base material, the engagement groove having an opening into which the leg can be inserted, and an engagement protrusion protruding along the inner edge of the opening for engaging and holding the claw portion.

The central cover portion may have a first side portion and a second side portion extending from the edges of the first cover portion and the second cover portion on the center side in the cover width direction toward the base material side, respectively, and a stepped surface portion extending between the first side portion and the second side portion and disposed with a step toward the base material side with respect to the first cover portion and the second cover portion.

The depth of the step may be set smaller than the depth of the pattern of the uneven pattern formed on the outer surface of the wall panel.

The cover material may have a watertight material that abuts in a watertight manner against the first wall panel and the second wall panel, and the watertight material may extend in the cover length direction along a corner surface on the first wall panel side of a first corner formed by the first cover portion and the first side portion, and along a corner surface on the second wall panel side of a second corner formed by the second cover portion and the second side portion.

The present invention relates to a joint structure for a wall of a building, comprising a first wall panel and a second wall panel arranged adjacent to each other, a wall base supporting each of the wall panels, and a wall accessory attached along the gap between the butted end faces of the first wall panel and the second wall panel, the wall accessory comprising a base material fixed to the wall base and a cover material covering the gap from the outer surface side of each of the wall panels, the base material having an engagement groove for engaging and holding the cover material, and a first back support piece and a second back support piece extending from a groove frame portion of the engagement groove to both sides outside in the cover width direction, the first back support piece being disposed between the first wall panel and the wall base. , and the second back support piece is fixed to the wall base in a state where it is arranged between the second wall panel and the wall base, and the cover material has a central cover portion, an engagement piece provided on the inner surface of the central cover portion and inserted into the engagement groove, and a first cover portion and a second cover portion extending from the side portion of the central cover portion to both sides in the cover width direction, and is fixed to the base material in a state where the central cover portion is interposed in a state where it is immersed in the gap, the first cover portion is arranged along the outer surface of the first wall panel, and the second cover portion is arranged along the outer surface of the second wall panel.

The wall accessories and joint structure of the present invention reduce the presence of the covering material, make it less likely for the covering material to deform or warp, and prevent misalignment when pushing the covering material into the base material with your fingers, improving the overall design of the wall, waterproofing of the joints, and ease of installation.

FIG. 1 is a partially exploded perspective view showing a joint structure of an embodiment. FIG. 2 is a partially exploded perspective view showing a joint structure of the embodiment. FIG. 2 is a cross-sectional view taken from below showing the state of a wall accessory of the embodiment in the middle of installation. FIG. 2 is a bottom cross-sectional view showing the installed state of a wall accessory according to an embodiment of the present invention. FIG. FIG.

The wall accessories and joint structure of the present invention will be described below with reference to the drawings. Note that the embodiment described below is an example of the present invention, and the configuration of the present invention is not limited to this specific example.

Figures 1 to 4 are schematic diagrams of the area around a wall joint S in a building such as a detached house or a commercial facility. As shown in Figures 1 to 4, the joint structure of this embodiment includes a wall accessory 1, a wall base 2, and exterior panels (wall panels) 3A and 3B.

The wall base 2 is generally a pillar or furring strip, but in this embodiment, it is a furring strip that is fixed to a pillar or existing wall (not shown) of the wall, and is arranged along the outer surface of the pillar. Note that in this embodiment, the surface of the wall base 2 opposite the pillar is the outer surface 5 of the wall base 2, the direction perpendicular to the outer surface 5 of the wall base 2 (the direction of arrows X1 and X2 in Figures 1 to 4) is the front-rear direction, the width direction of the wall base 2 (the direction of arrows Y1 and Y2 in Figures 1 to 4) is the left-right direction, and the length direction of the wall base 2 (the direction of arrows Z1 and Z2 in Figures 1 to 4) is the up-down direction.

The exterior panels 3A and 3B are metal sidings that are integrally formed by covering the foam insulation material from the rear side with aluminum foil or the like, and are formed in a generally flat plate shape that is long in one direction. The exterior panels 3A and 3B of this embodiment are usually set to a longitudinal dimension of approximately 8000 mm.

Although not shown, the exterior panels 3A and 3B are supported and fixed to the outer surface 5 of the wall base 2 in a horizontal orientation with their longitudinal direction aligned with the horizontal direction. In other words, the exterior panels 3A and 3B are installed horizontally on the wall base 2.

The exterior panels 3A, 3B may be made of ceramic siding made of cement or fibrous materials, resin siding made of resin or fibrous materials, wood siding, etc. In other words, the wall accessory 1 and joint structure of the present invention are not only applicable to walls in which the exterior panels 3A, 3B are made of metal siding. Furthermore, the wall accessory 1 and joint structure of the present invention are not only applicable to walls in which the exterior panels 3A, 3B are installed horizontally.

Many of the exterior panels 3A and 3B have a corrugated, mountain-shaped, stepped or other uneven pattern 7 formed on the outer surface 6. In the exterior panels 3A and 3B of this embodiment, the pattern depth H1 of the uneven pattern 7 is formed to be approximately 0.2 mm to 7.0 mm.

The exterior panels 3A, 3B are arranged on the outer surface 5 of the wall base 2 with their end faces 8 butted together. As shown in Figures 3 and 4, the exterior panels 3A, 3B are arranged side by side on either side of a reference line L1 that passes through the center between the left and right sides of the wall base 2, and a predetermined gap 9 is defined between the butted end faces 8. The wall accessory 1 is attached along the gap 9 between the butted end faces 8 of the exterior panels 3A, 3B.

Thus, the joint structure of this embodiment comprises a pair of exterior panels 3A, 3B arranged adjacent to each other on the left and right, a wall base 2 supporting each of these exterior panels 3A, 3B, and a wall accessory 1 attached along the gap 9 between the butt end faces (panel end faces) 8 of the exterior panels 3A, 3B.

As shown in Figures 1 to 4, the wall accessory 1 is an exterior component installed in the joints S of the wall, and includes a base material 11 and a cover material 12. The base material 11 is a plate material formed into an irregular cross section by bending a thin metal plate that is long in one direction, and is fixed to the outer surface 5 of the wall base 2 in a vertical direction with its longitudinal direction aligned with the extension direction (up-down direction) of the wall base 2. The longitudinal dimension of the base material 11 in this embodiment is usually set to about 8000 mm. Note that multiple base materials 11 are installed vertically according to the length of the wall base 2. In this case, one base material 11 may be cut in the short direction to match the length of the wall base 2.

The base material 11 is preferably formed from a metal plate. The metal plate may be one of iron, aluminum, copper, stainless steel, titanium, or aluminum-zinc alloy plated steel plate. The base material 11 may be formed not only by bending, but also by roll forming, press forming, extrusion, notching, or the like. Furthermore, the base material 11 may be formed from a synthetic resin material such as polyvinyl chloride resin or polycarbonate resin.

As shown in Figures 3 to 5, the base material 11 is formed in a symmetrical shape with respect to the reference line L1. The base material 11 has a first back support piece 21A, a second back support piece 21B, and a groove frame portion 22, and is disposed along the wall base 2 by overlapping and fixing the first back support piece 21A and the second back support piece 21B to the outer surface 5 of the wall base 2. The first back support piece 21A and the second back support piece 21B may be fixed to the wall base 2 by a fixing nail N as described below, or may be fixed to the wall base 2 by a tapping screw or a tacker needle, or may be fixed to the wall base 2 by other general fixing methods.

The first back support piece 21A is bent leftward from the front edge of the groove frame portion 22. The second back support piece 21B is bent rightward from the front edge of the groove frame portion 22, symmetrically to the first back support piece 21A with respect to the reference line L1. In other words, the first back support piece 21A and the second back support piece 21B form a substantially flat mounting portion at the front of the base material 11 that can abut against the outer surface 5 of the wall base 2 in a flush state.

The first back support piece 21A and the second back support piece 21B are each arranged in a face-to-face state on the outer surface 5 of the wall base 2, and are fixed by fixing nails N. The first exterior panel 3A is arranged facing the first back support piece 21A from its outer surface 23 side. That is, the first back support piece 21A is fixed between the wall base 2 and the first exterior panel 3A. On the other hand, the second exterior panel 3B is arranged facing the second back support piece 21B from its outer surface 23 side. That is, the second back support piece 21B is fixed between the wall base 2 and the second exterior panel 3B.

A folded portion 24 is formed on the leading edge (left edge) of the first back support piece 21A and the leading edge (right edge) of the second back support piece 21B. The folded portion 24 on the first back support piece 21A side is bent from the leading edge of the first back support piece 21A toward the outer surface 23 side toward the rear right (rear center between left and right). The folded portion 24 on the second back support piece 21B side is bent from the leading edge of the second back support piece 21B toward the outer surface 23 side toward the rear left (rear center between left and right).

A rib 25 is provided on each of the outer surface 23 of the first rear support piece 21A and the outer surface 23 of the second rear support piece 21B. The rib 25 is a protrusion formed by bending the cross section into a substantially V-shape, and is formed between the short side end surfaces of the first rear support piece 21A and the second rear support piece 21B. A plurality of ribs 25 (two each here) are arranged in parallel at a predetermined interval in the short direction (left-right direction) of the first rear support piece 21A and the second rear support piece 21B. The ribs 25 ensure a predetermined bending strength of the first rear support piece 21A and the second rear support piece 21B, and can suppress the intrusion of rainwater into the inside of the exterior panels 3A and 3B. In this embodiment, the fixing nail N is driven into the wall base 2 at the flat portion between the ribs 25 of the first rear support piece 21A and the second rear support piece 21B, but the driving position of the fixing nail N is not limited to the above-mentioned flat portion.

The groove frame portion 22 is bent and formed in a roughly M-shape. More specifically, the groove frame portion 22 is formed in a roughly M-shape in cross section that is symmetrical about the reference line L1, and has a left outer frame portion 22A that forms the left surface, a right outer frame portion 22B that forms the right surface, and an inner frame portion 22C that forms the recessed surface portion in the center between the left and right.

The left outer frame portion 22A extends rearward from the right edge of the first rear support piece 21A on the left side of the reference line L1. The right outer frame portion 22B extends rearward from the left edge of the second rear support piece 21B on the right side of the reference line L1.

The inner frame portion 22C is bent forward in a generally U-shape from the rear edges of the left outer frame portion 22A and the right outer frame portion 22B, and the inner recess of the inner frame portion 22C forms an engagement groove 26 that can engage and hold the cover material 12. In other words, the inner frame portion 22C forms the outer contour of the engagement groove 26.

The inner frame portion 22C opens to the rear. That is, the engagement groove 26 has an opening 27 at the rear. The bottom surface portion (groove bottom portion) 28 of the inner frame portion 22C is formed in a plane perpendicular to the reference line L1. In addition, the groove bottom portion 28 is provided on the same plane as the first back support piece 21A and the second back support piece 21B, and is arranged in a face-to-face state with the outer surface 5 of the wall base 2 when the base material 11 is fixed to the wall base 2. This makes it difficult for the inner frame portion 22C to shift position forward (in the pushing direction) when the cover material 12 is fitted into the base material 11. In addition, it is possible to prevent the groove side portion 29 of the inner frame portion 22C from bending excessively toward the inside (center between the left and right) of the engagement groove 26, thereby preventing the opening width of the opening 27 from narrowing. This allows for stable construction.

The left and right groove side portions (inner edges of the opening 27) 29 of the inner frame portion 22C are each provided with an engagement protrusion 30. The engagement protrusion 30 on the left groove side portion 29 is formed to protrude obliquely from the rear edge of the left outer frame portion 22A toward the right front (the center side between the left and right of the engagement groove 26). The engagement protrusion 30 on the right groove side portion 29 is formed to protrude obliquely from the rear edge of the right outer frame portion 22B toward the left front (the center side between the left and right of the engagement groove 26). The engagement protrusion 30 has a claw engagement surface 30F that faces the groove bottom portion 28.

The claw engagement surface 30F is formed as a gently sloping surface from the left and right groove side portions 29 toward the front of the center between the left and right of the engagement groove 26. The claw engagement surface 30F may also be formed as a surface that is approximately parallel to the groove bottom portion 28 from the left and right groove side portions 29 toward the center between the left and right of the engagement groove 26.

As described above, the engagement projections 30 are formed to protrude from the left and right groove side portions 29 of the inner frame portion 22C. The left and right groove side portions 29 of the inner frame portion 22C have their front edges connected to the left and right edges of the groove bottom portion 28, and their rear edges connected to the left and right outer frame portions 22A and 22B. The left and right outer frame portions 22A and 22B are connected to the first and second back support pieces 21A and 21B at their front edges. That is, the inner frame portion 22C, the engagement projections 30, the left and right outer frame portions 22A and 22B, the first and second back support pieces 21A and 21B are integrally formed from a single plate material.

3 to 6, the cover material 12 is a plate material formed into an irregular cross section by bending a thin metal plate that is long in one direction, and is engaged and fixed to the base material 11 in a vertical direction with its longitudinal direction coinciding with the extending direction (up-down direction) of the wall base 2. Note that a plurality of cover materials 12 are installed vertically in accordance with the length of the gap 9 between the exterior panels 3A, 3B. In this case, one cover material 12 may be cut in the short direction to match the length of the gap 9 before use.

The cover material 12 is preferably made of a metal plate. The metal plate may be one of iron, aluminum, copper, stainless steel, titanium, or aluminum-zinc alloy plated steel. More preferably, the cover material 12 is made of aluminum-zinc alloy plated steel or aluminum-zinc alloy plated steel with magnesium added for rust prevention. In consideration of the appearance of the exterior wall, the cover material 12 is preferably made of the same material as the metal plate on the surface of the exterior panels 3A and 3B. The cover material 12 may be formed by roll forming, press forming, extrusion, notching, or other methods other than bending. The cover material 12 may be formed of a synthetic resin material such as polyvinyl chloride resin or polycarbonate resin.

The cover material 12 is formed in a symmetrical shape with respect to the reference line L1. The cover material 12 has a first cover portion 31A, a second cover portion 31B, a central cover portion 31C, and an engagement piece 32. By engaging the engagement piece 32 with the engagement groove 26 of the base material 11, the cover material 12 is disposed along the gap 9 so as to cover the gap 9 from the outer surface 6 side of the exterior panels 3A and 3B.

As shown in FIG. 6, the upper end of the short side of the covering material 12 has an insertion piece 33, and the lower end has a notch 34. As shown in FIG. 1, when installing multiple covering materials 12 in a vertical line, the insertion piece 33 of the covering material 12 arranged on the lower side is inserted into the notch 34 of the covering material 12 arranged on the upper side. As a result, the upper and lower covering materials 12 are installed in a state where they are connected in the vertical direction.

As shown in Figs. 3 to 6, a watertight material 36 is attached to the inner surface 35 of the first cover part 31A and the inner surface 35 of the second cover part 31B. The watertight material 36 is a strip with a substantially rectangular cross section made of a material with high elasticity and water resistance, such as ethylene propylene diene rubber foam, polypropylene foam, ethylene propylene rubber foam, urethane foam resin, silicone resin, etc., and is extended in the length direction (vertical direction) of the cover material 12 along the corner surface 37 on the first exterior panel 3A side of the first corner 45A formed by the first cover part 31A and the first side surface 43A of the central cover part 31C, and along the corner surface 37 on the second exterior panel 3B side of the second corner 45B formed by the second cover part 31B and the second side surface 43B of the central cover part 31C, as shown in Fig. 5 (see Fig. 6).

As a result, when the cover material 12 is attached to the base material 11, the watertight material 36 is in close contact with the outer surfaces 6 and panel end faces 8 of the exterior panels 3A and 3B. That is, the watertight material 36 is in watertight contact with four surfaces: the cover portions 31A and 31B, the side portions 43A and 43B of the central cover portion 31C, the outer surfaces 6 of the exterior panels 3A and 3B, and the panel end faces 8 (see FIG. 4). This further enhances the effect of preventing rainwater from entering the wall through the gaps 9.

As shown in FIG. 5, the first cover portion 31A is bent leftward from the rear edge of the first side portion 43A of the central cover portion 31C. The second cover portion 31B is bent rightward from the rear edge of the second side portion 43B of the central cover portion 31C, symmetrically to the first cover portion 31A about the reference line L1. That is, the first cover portion 31A and the second cover portion 31B constitute two narrow, generally flat cover portions at the rear of the cover material 12 that can abut against the outer surfaces 6 of the first exterior panel 3A and the second exterior panel 3B in a face-to-face state.

The first cover part 31A of this embodiment has an outer surface part 41 extending leftward from the left rear edge part of the central cover part 31C, and an inner surface part 42 folded back at the left edge part of the outer surface part 41 and arranged facing the inside (front side) of the outer surface part 41. Similarly, the second cover part 31B has an outer surface part 41 extending rightward from the right rear edge part of the central cover part 31C, and an inner surface part 42 folded back at the right edge part of the outer surface part 41 and arranged facing the inside (front side) of the outer surface part 41. In this way, the cover parts 31A and 31B are formed in a double plate shape by folding back a plate body inward. Note that the outer surface part 41 of the cover parts 31A and 31B of this embodiment is formed flat, but when an uneven pattern 7 is formed on the outer surface 6 of the exterior panels 3A and 3B, an uneven pattern similar to the uneven pattern 7 may be formed on the outer surface part 41.

The central cover portion 31C is bent and formed into a substantially U-shape. More specifically, the central cover portion 31C is formed into a substantially rectangular U-shape in cross section that is symmetrical about the reference line L1, and has a first side portion 43A that forms the left side, a second side portion 43B that forms the right side, and a stepped surface portion 44 that forms a recessed surface portion in the center between the left and right.

The first side portion 43A extends forward (toward the base material 11) from the edge (first corner) 45A of the first cover portion 31A at the center of the cover width direction on the left side of the reference line L1. The second side portion 43B extends forward (toward the base material 11) from the edge (second corner) 45B of the second cover portion 31B at the center of the cover width direction on the right side of the reference line L1. The stepped surface portion 44 extends between the front edge 46A of the first side portion 43A and the front edge 46B of the second side portion 43B, and is disposed with a step forward (toward the base material 11) with respect to the cover portions 31A and 31B. In this way, the central cover portion 31C forms a substantially rectangular recessed surface portion in the rear center of the cover material 12.

In this embodiment, the step depth H2 of the step formed by the cover parts 31A, 31B and the step surface part 44, i.e., the step depth H2 of the central cover part 31C, is set to be approximately the same as the pattern depth H1 of the uneven pattern 7 formed on the outer surface 6 of the exterior panels 3A, 3B, or is set to be greater than the pattern depth H1.

In this embodiment, the first side portion 43A has a stepped inner side portion 47 that connects the outer surface portion 41 and the stepped surface portion 44 of the first cover portion 31A, and a stepped outer side portion 48 that connects the inner surface portion 42 and the engagement piece 32 (connecting portion 51) of the first cover portion 31A. Similarly, the second side portion 43B has a stepped inner side portion 47 that connects the outer surface portion 41 and the stepped surface portion 44 of the second cover portion 31B, and a stepped outer side portion 48 that connects the inner surface portion 42 and the engagement piece 32 (connecting portion 51) of the second cover portion 31B. In other words, the first side portion 43A and the second side portion 43B are formed in a double plate shape with plates stacked inside and outside.

As described above, the first cover part 31A and the second cover part 31B are connected to the left and right rear edges of the central cover part 31C, respectively, and the first cover part 31A, the second cover part 31B, and the central cover part 31C form a two-stage cover part whose central part is recessed into a roughly rectangular shape.

Incidentally, when the cover material 12 is engaged and fixed to the base material 11, the first cover portion 31A and the second cover portion 31B are pressed against the outer surfaces 6 of the exterior panels 3A and 3B via the watertight material 36, as shown in Fig. 4, and the reaction force is applied to the first cover portion 31A and the second cover portion 31B. In other words, stress is applied to the first cover portion 31A and the second cover portion 31B in a direction that curves them backward. However, in the case of the cover material 12 of this embodiment, the four bent portions, namely the edge 45A on the center side of the cover width direction of the first cover portion 31A, the edge 45B on the center side of the cover width direction of the second cover portion 31B, the front edge 46A on the first side surface portion 43A side of the central cover portion 31C, and the front edge 46B on the second side surface portion 43B side of the central cover portion 31C, act as bending starting points and absorb the above-mentioned stress, so that the first cover portion 31A and the second cover portion 31B are less likely to bend backward (in the direction away from the exterior panels 3A and 3B). This can further enhance the effect of preventing rainwater from entering the wall through the gap 9.

As shown in FIG. 5, the engagement pieces 32 are plate pieces bent into a generally L-shape, and are arranged in pairs on the left and right sides of the reference line L1 on the front surface (inner surface) 49 of the stepped surface portion 44 of the central cover portion 31C. In more detail, the engagement pieces 32 have a connecting portion 51 extending from the stepped outer surface portion 48 of the central cover portion 31C toward the center between the left and right sides, a leg portion 52 extending forward from the edge of the connecting portion 51 on the center side between the left and right sides, and a claw portion 53 bent backward from the tip edge (front edge) of the leg portion 52.

The connecting portion 51 extends diagonally forward from the edge of the central cover portion 31C toward the center between the left and right sides, gradually moving away from the stepped surface portion 44 of the central cover portion 31C. Therefore, before the cover material 12 is attached to the base material 11, a gap 60 is defined between the connecting portion 51 and the stepped surface portion 44, which allows the connecting portion 51 to tilt.

The legs 52 are arranged in pairs on the left and right sides of the reference line L1, and extend diagonally forward from the edge of the connecting part 51 at the center between the left and right sides, away from the reference line L1. In other words, the left and right legs 52 extend forward so as to move away from each other as they approach the tip edges.

The claws 53 are formed by folding back outward to the left and right at the tip edges (front edges) of the legs 52. That is, the left and right claws 53 are each folded backward so that they move away from each other as they approach the tips.

As described above, the base end edge of the connecting portion 51 of the engaging piece 32 is connected and supported by the front edge portions 46A, 46B of the side portions 43A, 43B. In addition, a clearance 60 is defined between the connecting portion 51 and the step surface portion 44 of the central cover portion 31C. Therefore, when a predetermined stress is applied to the claw portion 53 at the tip from the left and right direction, the engaging piece 32 swings left and right within a predetermined range with the base end edge portion of the connecting portion 51 (the front edge portions 46A, 46B of the side portions 43A, 43B) as a fulcrum. In this way, since the engaging piece 32 is configured to be swingable with the base end edge portion of the connecting portion 51 as a fulcrum, it has a higher degree of freedom of movement than one that is directly connected to the inner side portion of the cover material 12. In particular, even if the engagement piece 32 is set to a short length in the front-to-rear direction due to the provision of the central cover portion 31C, the degree of freedom of movement is high, so the force required to fit the cover material 12 into the base material 11 is reduced accordingly.

The claw portion 53, leg portion 52, connecting portion 51 of the engagement piece 32, the stepped outer side surface portion 48 of the central cover portion 31C, the inner surface portion 42 and outer surface portion 41 of the cover portions 31A and 31B, the stepped inner side surface portion 47 of the central cover portion 31C, and the stepped surface portion 44 are integrally formed from a single plate material.

The dimension between the rear ends of the left and right claws 53 (claw width dimension) is formed slightly larger than the dimension between the tips of the engagement protrusions 30 provided on the groove frame portion 22 of the base material 11, i.e., the width dimension (opening width dimension) of the opening 27. Therefore, when the engagement pieces 32 are inserted into the opening 27 of the groove frame portion 22 to engage the cover material 12 with the base material 11, the left and right claws 53 each abut against the engagement protrusions 30 inside the opening 27. Furthermore, by pushing the engagement pieces 32 further into the engagement groove 26 (forward) than the opening 27, the left and right claws 53 are inclined left and right inward (in a direction approaching the reference line L1) so as to approach each other slightly, and further inclined left and right outward (in a direction away from the reference line L1) to the original position so as to move away from each other when their respective tips pass the tips of the engagement protrusions 30 (returning to the original position). As a result, the tip (rear end) of the claw portion 53 fits into the claw engagement surface 30F of the engagement projection 30. At this time, the elastic force of the watertight material 36 is applied to the cover material 12 in a direction pushing it backward, so that the tip of the claw portion 53 fits more firmly into the claw engagement surface 30F of the engagement projection 30. As a result, the cover material 12 is stably engaged and held in the base material 11.

The technique of increasing the degree of freedom of movement of the engaging piece 32 by the gap 60 is also effective for wall accessories other than those having the central cover portion 31C as in the above embodiment. Although not shown, other forms of wall accessories having the above technique will be described using the symbols in the above embodiment. For example, the cover material 12 does not have the central cover portion 31C, and the cover portion is formed in a substantially planar shape like the joint material of the conventional wall accessory (for example, the first cover portion 31A and the second cover portion 31B are connected on the same plane, etc. Note that the term "substantially planar" does not only refer to cases where the entire surface of the cover portion is flat, but also includes cases where an uneven pattern 7 is formed on the exterior panels 3A and 3B, in which case the cover portion has an uneven pattern similar to the uneven pattern 7). The cover portion has an outer surface portion 41 and an inner surface portion 42 that is formed by folding back diagonally forward from both outer left and right edges of the outer surface portion 41 toward the center between the left and right so as to gradually move away from the outer surface portion 41 (thereby forming a gap 60 between the outer surface portion 41 and the inner surface portion 42), and the engagement pieces 32 are each formed by extending forward from the edge of the inner surface portion 42 at the center between the left and right (in this case, the engagement pieces 32 do not need to have a connecting portion 51). As a result, when a predetermined stress is applied to the tip (e.g., the claw portion 53) from the left and right direction, the engagement pieces 32 swing left and right within a predetermined range with the base end edge of the inner surface portion 42 (the folded end of both outer left and right edges of the outer surface portion 41) as a fulcrum.

As described above, the wall accessory 1 of this embodiment is a wall accessory 1 provided in a joint portion S of a building wall, and includes a base material 11 fixed to the wall base 2, and a cover material 12 covering the gap 9 between the butt end faces 8 of a pair of wall panels 3A, 3B supported by the wall base 2. The base material 11 has a first back support piece 21A provided between the first wall panel 3A of the wall panels 3A, 3B and the wall base 2, a second back support piece 21B provided between the second wall panel 3B of the wall panels 3A, 3B and the wall base 2, and an engagement groove 26 provided between the first back support piece 21A and the second back support piece 21B to engage and hold the cover material 12. The cover material 12 is a first cover portion 31A arranged along the outer surface 6 of the first wall panel 3A, and a second wall panel 3B supported by the wall base 2. The panel 3B has a second cover portion 31B arranged along the outer surface 6, a central cover portion 31C arranged between the first cover portion 31A and the second cover portion 31B and inserted into the gap 9, and an engagement piece 32 arranged on the inner surface 49 of the central cover portion 31C and inserted into the engagement groove 26. The engagement piece 32 has a leg portion 52 extending in the cover length direction along the inner surface 49 of the central cover portion 31C and protruding toward the base material 11, and a claw portion 53 arranged at the tip of the leg portion 52 and engaged with the engagement groove 26 of the base material 11. The engagement groove 26 has an opening 27 into which the leg portion 52 can be inserted, and an engagement protrusion 30 protruding along the inner edge 29 of the opening 27 to engage and hold the claw portion 53.

When this is attached to the joint area S, the central cover portion 31C of the covering material 12 is inserted into the gap 9 between the butted end faces 8 of the wall panels 3A, 3B, so the presence of the covering material 12 in the wall is reduced. This significantly improves the design of the entire wall. Also, because the central cover portion 31C is recessed between the first cover portion 31A and the second cover portion 31B of the covering material 12, the torsional and bending rigidity of the covering material 12 is high, making it less likely to deform or warp. This further improves the design of the entire wall and also improves the waterproofing of the joint area S.

Moreover, with this structure, the worker can accurately grasp the position of the engagement piece 32 provided on the inner surface 49 of the central cover portion 31C by touching it with his/her fingers or by visual inspection from the outside of the cover material 12, so that the pushing direction can be prevented from being shifted when pushing the cover material 12 with his/her fingers into the base material 11. Therefore, ease of construction is improved.

The central cover portion 31C also has a first side portion 43A and a second side portion 43B that extend from the edges 45A, 45B at the center of the cover width direction of the first cover portion 31A and the second cover portion 31B, respectively, toward the base material 11 side, and a stepped surface portion 44 that extends between the first side portion 43A and the second side portion 43B and is positioned with a step toward the base material 11 side relative to the first cover portion 31A and the second cover portion 31B.

In this case, the shadows cast by the first side surface portion 43A, the second side surface portion 43B, and the step surface portion 44 of the central cover portion 31C can reduce the presence of the first cover portion 31A and the second cover portion 31B, further improving the design of the entire wall. Furthermore, when this case is attached to the joint portion S, the central cover portion 31C can be interposed in the gap 9 with the first side surface portion 43A and the second side surface portion 43B respectively in close proximity to the butt end faces 8 of the wall panels 3A and 3B, further improving the waterproofing of the joint portion S.

In addition, with this type of wall accessory, if it is difficult to fit the covering material into the base material, the construction worker places a batten on the outer surface of the covering material and hits it from the outside with a hammer or the like to fit the covering material into the base material. However, if the entire outer surface of the covering material (joint material) is formed flat and without any irregularities, as in the above-mentioned conventional wall accessory, there is a risk that the outer surface of the covering material will become deformed or distorted when the batten is hit with a hammer or the like. Another problem is that the deformation or distortion is easily noticeable.

However, in the wall accessory 1 of this embodiment, the center of the cover material 12 (center cover portion 31C) is recessed, and when the cover material 12 is engaged with the base material 11 using a batten as described above, the impact applied to the outer surface of the cover material 12 is distributed to the first side portion 43A and the second side portion 43B of the center cover portion 31C. This makes it difficult for deformation or distortion to occur on the outer surface of the cover material 12, preventing damage to the design of the entire wall and the waterproofing of the joint portion S.

The step depth H2 of the step formed by the first cover part 31A and the second cover part 31B and the step surface part 44 may be set smaller than the pattern depth H1 of the uneven pattern 7 formed on the outer surface 6 of the wall panel 3A, 3B. In this way, by setting the step depth H2 of the step formed by the cover part 31A, 31B and the step surface part 44 smaller than the pattern depth H1 of the uneven pattern 7 of the wall panel 3A, 3B, the presence of the uneven pattern 7 formed on the outer surface 6 of the wall panel 3A, 3B is more emphasized, and the design of the entire wall is further improved. Note that the step depth H2 being set smaller than the pattern depth H1 does not necessarily mean that the step depth H2 is substantially smaller than the pattern depth H1, but also means that the step surface part 44 is located behind the pattern bottom of the uneven pattern 7 in the installed state.

The cover material 12 also has a watertight material 36 that abuts in a watertight manner against the first wall panel 3A and the second wall panel 3B, and the watertight material 36 extends in the cover length direction along the corner surface 37 on the first wall panel 3A side of the first corner portion 45A formed by the first cover portion 31A and the first side portion 43A, and along the corner surface 37 on the second wall panel 3B side of the second corner portion 45B formed by the second cover portion 31B and the second side portion 43B.

This allows the waterproof material 36 to be reliably in contact with at least three surfaces: the cover parts 31A and 31B, the side parts 43A and 43B of the central cover part 31C, and the wall panels 3A and 3B, further improving the waterproofing of the joint part S.

The wall joint structure of this embodiment is a wall joint structure of a building, and includes first adjacent joints.
The wall panel 3A includes a second wall panel 3B, a wall base 2 supporting the wall panels 3A and 3B, and a wall accessory 1 attached along a gap 9 between the butt end faces 8 of the first wall panel 3A and the second wall panel 3B. The wall accessory 1 includes a base material 11 fixed to the wall base 2, and a cover material 12 covering the gap 9 from the outer surface 6 side of each wall panel 3A and 3B. The base material 11 has an engagement groove 26 for engaging and holding the cover material 12, and a first back support piece 21A and a second back support piece 21B extending from a groove frame portion 22 of the engagement groove 26 to both outer sides in the cover width direction. The first back support piece 21A is disposed between the first wall panel 3A and the wall base 2, and the second back support piece 21B is disposed between the first wall panel 3A and the wall base 2. The cover material 12 has a central cover portion 31C, an engaging piece 32 provided on an inner surface 49 of the central cover portion 31C and inserted into and engaged with the engaging groove 26, and a first cover portion 31A and a second cover portion 31B extending outward in the cover width direction from side portions 43A, 43B of the central cover portion 31C, and is fixed to the base material 11 with the central cover portion 31C interposed in a state where it is immersed in the gap 9, and the first cover portion 31A is arranged along the outer surface 6 of the first wall panel 3A and the second cover portion 31B is arranged along the outer surface 6 of the second wall panel 3B.

When the wall accessory 1 is attached to the joint area S, the central cover portion 31C of the covering material 12 is inserted into the gap 9 between the butted end faces 8 of the wall panels 3A and 3B, so the presence of the covering material 12 in the wall is reduced. This significantly improves the design of the entire wall. In addition, because the central cover portion 31C is recessed between the first cover portion 31A and the second cover portion 31B of the covering material 12, the torsional and bending rigidity of the covering material 12 is high, making it less likely to deform or warp. This further improves the design of the entire wall and also improves the waterproofing of the joint area S.

Moreover, with this device, the worker can accurately grasp the position of the engagement piece 32 provided on the inner surface 49 of the central cover portion 31C by touching it with his/her fingers or by visual inspection from the outside of the cover material 12, so that the direction of pushing the cover material 12 into the base material 11 can be prevented from shifting. This also improves ease of installation.

1 Wall accessory 2 Wall base 3A First exterior panel (wall panel)
3B Second exterior panel (wall panel)
6 Outer surface of wall panel 8 Panel end surface (butt end surface)
9 Gap 11 Base material 12 Cover material 21A First back support piece 21B Second back support piece 26 Engagement groove 27 Opening 29 Inner edge of opening 30 Engagement protrusion 31A First cover part 31B Second cover part 31C Center cover part 32 Engagement piece 36 Watertight material 43A First side part 43B Second side part 44 Step surface Part 49 Inner surface of central cover part 51 Connecting part 52 Leg part 53 Claw part S Joint part

Claims (5)

A wall accessory provided at a joint of a wall of a building, comprising: a base material fixed to a wall base; and a cover material covering a gap between butted end faces of a pair of wall panels supported by the wall base;
The base material has a first rear support piece provided between a first wall panel of the wall panels and the wall base, a second rear support piece provided between a second wall panel of the wall panels and the wall base, and an engagement groove provided between the first rear support piece and the second rear support piece, which engages and holds the cover material;
the cover material includes a first cover portion disposed along an outer surface of the first wall panel, a second cover portion disposed along an outer surface of the second wall panel, a central cover portion provided between the first cover portion and the second cover portion and interposed in a state of being immersed in the gap, and an engagement piece provided on an inner surface of the central cover portion and inserted into the engagement groove,
The engaging piece has a leg portion extending in the cover length direction along the inner surface of the central cover portion and projecting toward the base material side, and a claw portion provided at the tip of the leg portion and engaged with the engaging groove of the base material,
The engagement groove is a wall accessory having an opening into which the leg can be inserted, and an engagement protrusion that protrudes along the inner edge of the opening and engages and holds the claw portion. The wall accessory according to claim 1, wherein the central cover portion has a first side portion and a second side portion that extend from the end edges of the first cover portion and the second cover portion on the center side in the cover width direction toward the base material side, and a stepped surface portion that extends between the first side portion and the second side portion and is positioned with a step toward the base material side relative to the first cover portion and the second cover portion. The wall accessory according to claim 2, characterized in that the step depth of the step is smaller than the pattern depth of the uneven pattern formed on the outer surface of the wall panel. The covering material has a watertight material that abuts against the first wall panel and the second wall panel in a watertight manner,
4. The wall accessory as described in claim 2 or 3, wherein the watertight material extends in the length direction of the cover along a corner surface of a first corner formed by the first cover portion and the first side portion on the first wall panel side, and along a corner surface of a second corner formed by the second cover portion and the second side portion on the second wall panel side. A joint structure of a wall of a building,
The wall panel comprises a first wall panel and a second wall panel arranged adjacent to each other, a wall base supporting each of the wall panels, and a wall accessory attached along a gap between the butt end faces of the first wall panel and the second wall panel,
The wall accessory includes a base material fixed to the wall base and a cover material covering the gap from the outer surface side of each of the wall panels,
The base material has an engagement groove that engages and holds the cover material, and a first back support piece and a second back support piece that extend from a groove frame portion of the engagement groove to both sides in the cover width direction outside, and is fixed to the wall base in a state in which the first back support piece is disposed between the first wall panel and the wall base, and the second back support piece is disposed between the second wall panel and the wall base,
The cover material has a central cover portion, an engaging piece provided on the inner surface of the central cover portion and inserted into the engaging groove, and a first cover portion and a second cover portion extending from the side portion of the central cover portion to both sides in the cover width direction, and is fixed to the base material with the central cover portion interposed in a state where it is immersed in the gap, the first cover portion arranged along the outer surface of the first wall panel, and the second cover portion arranged along the outer surface of the second wall panel.

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