JP2024051287A - Exterior wall panel and construction method for exterior wall panel - Google Patents

Abstract

[Problem] To provide an exterior wall panel that can be attached to a building frame from the indoor side using an exterior wall panel material for an outside corner, each of whose orthogonal faces has a horizontal length narrower than the width of a corner post, and a construction method for the exterior wall panel. [Solution] The panel comprises a plurality of exterior wall panels for an outside corner, each of whose orthogonal faces has a horizontal length narrower than the width of a corner post, and joined vertically, a plurality of flat exterior wall panels, each of which is joined vertically and has one horizontal edge connected to a horizontal edge on each face side of each of the exterior corner exterior wall panels, each of which has the other horizontal edge extending to the side of the position of the corner post, a first vertical furring strip, which is located at the indoor side corner of the exterior wall panel material for an outside corner, and which supports the exterior wall panel material for an outside corner, a second vertical furring strip, which is located on the other horizontal edge side of the flat exterior wall panel material, and which supports the other horizontal edge of the flat exterior wall panel material, and a plurality of horizontal members, which connect the first vertical furring strip and the second vertical furring strip. [Selected Figure] Figure 1

Description

This invention relates to an exterior wall panel that is attached to the corners of a building, and a construction method using this exterior wall panel.

Patent Document 1 discloses an exterior wall panel that is attached to the protruding corners of a building. This exterior wall panel is made up of multiple exterior wall panels with two orthogonal surfaces that are arranged one above the other and connected to each other with vertical furring strips, and each exterior wall section, which is the assembly of each of the two surfaces, is provided with two or more fasteners in the horizontal direction, each of which has a fixing function for fixing the exterior wall panel to the building and an adjustment function for adjusting the height position of the exterior wall panel.

JP 2020-105754 A

However, conventional exterior wall panels placed at the above-mentioned protruding corners are manufactured so that the orthogonal faces of the above-mentioned exterior wall surface materials have a horizontal length that exceeds the width of the corner post, and the structure does not allow the use of prefabricated exterior wall surface materials for protruding corners manufactured by panel manufacturers. In other words, because the orthogonal faces of prefabricated exterior wall surface materials for protruding corners are shorter than the width of the above-mentioned corner post, exterior wall panels that simply use such exterior wall surface materials for protruding corners cannot be attached to the building frame by working from the indoor side.

In view of the above, the objective of this invention is to provide an exterior wall panel and a construction method for the exterior wall panel that can be attached to a building frame from the indoor side using exterior wall facing materials for corners in which each orthogonal surface has a width narrower than the width of the corner post.

In order to solve the above problems, the exterior wall panel of the present invention comprises a plurality of exterior corner panelings, each of whose orthogonal faces has a width narrower than the width of the corner post, joined together at the top and bottom,
A plurality of flat exterior wall panels joined vertically, one of whose horizontal edges is connected to the horizontal edges of each of the exterior wall panels for the protruding corners, and the other of whose horizontal edges is located laterally beyond the position of the corner post;
A first vertical furring strip is located at the indoor corner of the exterior corner material and supports each surface of the exterior corner material on two outdoor surfaces;
A second vertical furring strip is located on the other horizontal edge side of the flat exterior wall surface material and supports the other horizontal edge of the flat exterior wall surface material;
A plurality of horizontal members connecting the first vertical furring strip and the second vertical furring strip;
The present invention is characterized by comprising:

With the above configuration, an exterior wall panel is obtained in which the exterior corner exterior wall material and the flat exterior wall material are integrated by the first vertical furring strip, the second vertical furring strip, and the horizontal material. In other words, it is possible to provide a large exterior corner exterior wall panel that can be attached from the indoor side using prefabricated exterior corner exterior wall materials manufactured by panel manufacturers, without using a special exterior corner exterior wall material in which each orthogonal surface has a horizontal length that exceeds the width of the corner post.

All or some of the multiple cross members may have a first locking portion that is locked to the building's structural body at a position to the side of the corner post and that does not overlap the corner post. This allows the exterior wall panel to be locked to the building's structural body using a fastener or clip provided at a location to the side of the corner post.

The second vertical furring strip may have a second locking portion that is locked to the building's structural body near the connection point with the horizontal member having the first locking portion. This allows the exterior wall panel to be locked to the building's structural body using fasteners or clips at two locations to the side of the corner posts on each side.

A joint backing strip extending vertically on the back side of the connection between the exterior corner exterior wall panel and the flat exterior wall panel may be disposed between the horizontal members. This allows the connection between the exterior corner exterior wall panel and the flat exterior wall panel to be fixed to the joint backing strip, thereby improving the fire resistance and waterproofing of the exterior wall panel.

The method for constructing exterior wall panels of this invention is a method for connecting exterior wall panels having the above-mentioned joint backing furring strips vertically, and is characterized by including a step of inserting a post-attached furring strip from the indoor side to the back side of the corner post located on an extension line of the joint backing furring strip between the horizontal member located at the bottom of the upper exterior wall panel and the horizontal member located at the top of the lower exterior wall panel of the upper exterior wall panel, and fixing the post-attached furring strip to both horizontal members.

The above method allows for the placement of exterior wall panels made of exterior corner materials with orthogonal faces each having a width narrower than the width of the corner post, one above the other, and the above-mentioned retrofit furring strips attached from the indoor side to seal the gap between the upper and lower back joint furring strips, improving fire resistance and waterproofing.

In the above-mentioned exterior wall panel construction method, the post-installation furring strip has a through hole formed in a horizontal direction in a plane parallel to the panel surface of the exterior wall panel, and a fastening member passed through the through hole may be fastened to a fixing member attached to each of the two horizontal members. This allows the post-installation furring strip to be easily fixed to the two horizontal members on the back side of the corner post.

In the above-mentioned exterior wall panel construction method, a post-attachment plate member may be attached between the downward veneer member that protrudes downward from the lowest horizontal member of the upper exterior wall panel on the extension line of the joint back furring strip, and the upward veneer member that protrudes upward from the highest horizontal member of the lower exterior wall panel, so that the upper side of the post-attachment plate member is located on the indoor side of the downward veneer member and the lower side of the post-attachment plate member is located on the outdoor side of the upward veneer member, and the post-attachment furring strip is arranged and fixed on the indoor side of the post-attachment plate member. This makes it possible to prevent water that has flowed down from above on the outdoor side of the joint back furring strip of the upper exterior wall panel from infiltrating into the indoor side of the post-attachment furring strip.

The present invention has the effect of providing an exterior wall panel that can be attached to a building frame from the indoor side using exterior corner paneling in which each orthogonal surface has a width narrower than the width of the corner post.

FIG. 2 is a front view illustrating an exterior wall panel according to an embodiment. 1 is an explanatory diagram showing a schematic horizontal cross section of an exterior wall panel of an embodiment and a part of a building frame. FIG. 1A is an explanatory diagram showing the cross sections of the upper and lower parts of an exterior wall surface material, and FIG. 1B is an explanatory diagram showing the fitting locations of the exterior wall surface materials arranged vertically in FIG. FIG. 2 is a front view of an exterior wall panel illustrating a construction method for vertically connecting the exterior wall panels of FIG. 1 . FIG. 2 is a front view of an exterior wall panel illustrating a process of attaching a rear-attached furring strip and a rear-attached plate member when connecting the exterior wall panels of FIG. 1 vertically. 1A is an explanatory diagram of a vertical cross section of an exterior wall panel showing a process of attaching a rear-attached furring strip and a rear-attached plate member when connecting the exterior wall panels of FIG. 1 vertically.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
1 and 2, the exterior wall panel 5 includes a plurality of exterior corner wall surface materials 50A joined vertically, and a plurality of flat exterior wall surface materials 50B joined vertically. One lateral edge of the flat exterior wall surface material 50B is connected to the lateral edges of each of the orthogonal faces of the exterior corner wall surface material 50A.

Each of the orthogonal faces of the exterior corner wall panel 50A has a width narrower than the width of the corner post 70 of the building's framework 7. In addition, the flat exterior wall panel 50B has a width such that the other lateral edge of the flat exterior wall panel 50B extends to the side beyond the position of the corner post 70.

The exterior wall surface material for corners 50A and the flat exterior wall surface material 50B (hereinafter, when there is no need to distinguish between them, they will be referred to as exterior wall surface material 50) are metal sandwich panels in which non-combustible heat insulating material 50a is sandwiched between steel plates 50b and 50c, as shown in, for example, Figures 3(A) and 3(B). When two exterior wall surface materials 50 are arranged one above the other, two recesses 50d formed on the lower end surface of the exterior wall surface material 50 located on the upper level are fitted into two protrusions 50e formed on the upper end surface of the exterior wall surface material 50 located on the lower level, which are long in the width direction, so that the upper and lower exterior wall surface materials 50 are combined so that they do not shift out of position relative to each other in the out-of-plane direction.

The exterior wall panel 5 is provided with a first vertical furring strip 51 located at the indoor corner R of the exterior corner material 50A and to which the corner of the exterior corner material 50A is fixed with a screw, two second vertical furring strips 52 located near the other horizontal edge of the flat exterior wall material 50B and to which the other horizontal edge of the flat exterior wall material 50B is fixed with a screw, and a number of horizontal members 53 connecting the first vertical furring strip 51 and the second vertical furring strip 52. The first vertical furring strip 51 is made of a square pipe, and supports the vicinity of the corners of the two sides of the exterior corner material 50A by driving screws into the two surfaces of the first vertical furring strip 51 on the outdoor side. In FIG. 1, the screw fixing points of the exterior wall material 50 are indicated by black circles. Each horizontal member 53 is fixed to the first vertical furring strip 51 and the second vertical furring strip 52 via an L-shaped metal fitting 501.

As an example, a ladder-shaped portion is formed by two horizontal members 53 located at the top of the exterior wall panel 5 and below it, and a short vertical member 54 fixed to these two horizontal members 53. One of the short vertical members 54 is one of the members that constitute the joint back furring strip 57 described later, and the other short vertical member 54 is located at a position that is to the side of the corner post 70 and has a locking portion 56A that is locked to a fastener 7A on the floor of the building's framework 7. The fastener 7A may be, for example, a fastener having a height adjustment function as disclosed in Patent Document 1 (JP Patent Publication 2020-105754). The locking portion 56A is, for example, an L-angle. The uppermost corner exterior wall surface material 50A and the flat exterior wall surface material 50B are fixed to the upper horizontal member 53 of the ladder-shaped portion with screws. The lower horizontal member 53 of the ladder-shaped portion is hereinafter referred to as a horizontal furring strip 53A. Alternatively, instead of using the ladder-shaped portion, the horizontal furring strip 53A may be positioned at the top, and this horizontal furring strip 53A may have a locking portion 56A.

The lowest corner exterior wall panel 50A and flat exterior wall panel 50B are fixed to the lowest cross member 53 of the exterior wall panel 5 with screws.

The horizontal members 53, 53 at the top and bottom positions of the exterior wall panel 5, and the horizontal furring strips 53A and other horizontal members 53 are hereinafter referred to as horizontal furring strips 53B. These horizontal furring strips 53B have locking portions 56B that lock onto clips 7B of the wind beams of the building's framework 7 at locations to the side of the corner posts 70. Clips 7B may have a structure in which the height adjustment mechanism is omitted from fasteners 7A, for example. Locking portions 56B are made of channel steel, for example. Locking portions 56A and 56B are first locking portions located immediately to the side of the corner posts 70.

A locking portion 56C that locks to a fastener 7A of the building's frame 7 is provided near the portion of the second vertical furring strip 52 where the above-mentioned horizontal furring strip 53A is connected, i.e., at the same height as the locking portion 56A on the upper side of the second vertical furring strip 52. Meanwhile, a locking portion 56D that locks to a clip 7B of a wind beam of the building's frame 7 is provided near the portion of the second vertical furring strip 52 where the above-mentioned horizontal furring strip 53B is connected. Locking portions 56C and 56D are second locking portions located on the second vertical furring strip 52.

The first vertical furring strip 51 is not fixed to the building's framework 7 by fasteners 7A or clips 7B, but is supported in a cantilever fashion by the cross members 53.

At the connection points between the corner exterior wall panel 50A and the flat exterior wall panel 50B, vertically extending joint backing strips 57 are arranged between the horizontal members 53, and each joint backing strip 57 is fixed to the horizontal members 53 via an L-shaped metal fitting 501.

In addition, thin vertical members 58 extending vertically are arranged between the horizontal members 53 at approximately the horizontal center position of the flat exterior wall surface member 50B, and each thin vertical member 58 is fixed to the horizontal members 53 via an L-shaped metal fitting 501.

With the above configuration, an exterior wall panel 5 is obtained in which the exterior corner wall surface material 50A and the flat exterior wall surface material 50B are integrated by the first vertical furring strip 51, the second vertical furring strip 52, and the horizontal member 53. In other words, it is possible to provide a large exterior corner exterior wall panel 5 that can be attached from the indoor side using a prefabricated exterior corner wall surface material 50A manufactured by a panel manufacturer, without using a special exterior corner wall surface material whose orthogonal faces have a horizontal length that exceeds the width of the corner post 70. In addition, the exterior corner wall surface material 50A and the flat exterior wall surface material 50B can be transported separately in a stacked state to the installation location of the base frame on which the exterior wall panel 5 is assembled, improving the transport efficiency of the exterior wall surface materials.

If all or some of the multiple horizontal members 53 have locking portions 56A, 56B that lock onto the building's structural body 7 at a location to the side of the corner post 70 of the flat exterior wall surface member 50B, the exterior wall panel 5 can be locked onto the building's structural body 7 using fasteners 7A and clips 7B provided at a location to the side of the corner post 70. As in this example, one of the short vertical members 54 in the ladder-shaped portion on the upper side of the exterior wall panel 5 may have a locking portion 56A that locks onto a fastener 7A on the floor of the building's structural body 7, but a different configuration may also be used.

If the second vertical furring strip 52 has locking parts 56C, 56D that lock onto the building's structural body 7 near the connection points with the horizontal furring strips 53A, 53B, the exterior wall panel 5 can be locked onto the building's structural body 7 using fasteners 7A and clips 7B provided on the structural body 7 at positions corresponding to those positions. The first vertical furring strip 51 is cantilevered by the horizontal furring strips 53A, 53B, which are supported at two points by the locking parts 56A, 56C and locking parts 56B, 56D located at two horizontally spaced locations.

When the joint backing furring strips 57 that extend vertically on the indoor side of the connection between the corner exterior wall panel 50A and the flat exterior wall panel 50B are placed between the horizontal members 53, the connection between the corner exterior wall panel 50A and the flat exterior wall panel 50B can be fixed to the joint backing furring strips 57, thereby improving the fire resistance and waterproofing of the exterior wall panel 5.

Next, the construction method of the exterior wall panels will be explained. In this construction method of the exterior wall panels, as shown in FIG. 4, a post-installation furring strip 571 is installed at the connection between the upper exterior wall panel 5 and the lower exterior wall panel 5. In other words, this construction method of the exterior wall panels includes the steps of inserting the post-installation furring strip 571 behind the corner post 70 that is located on the extension line of the back joint furring strip 57 between the lowest horizontal member 53 of the upper exterior wall panel 5 and the highest horizontal member 53 of the lower exterior wall panel 5, and fixing this post-installation furring strip 571 to both horizontal members 53.

The retrofit furring strip 571 is made of, for example, a square pipe. The retrofit furring strip 571 has two horizontal through holes on the upper side and two on the lower side in a plane parallel to the panel surface of the exterior wall panel 5. The lowermost cross member 53 of the upper exterior wall panel 5 has an L-shaped metal fitting (fixing member) 502 with its bolt screwing piece facing downward, and the uppermost cross member 53 of the lower exterior wall panel 5 has an L-shaped metal fitting 502 with its bolt screwing piece facing upward. Each bolt screwing piece has an insertion hole formed therein, and a nut 503 is welded to each insertion hole with its center aligned. The worker puts his hand behind the corner post 70, inserts the retrofit furring strip 571 horizontally, places it against the L-shaped metal fitting 502, and passes the bolt 506, which is a fastening member, through the insertion hole and screws it into the nut 503, thereby fixing the retrofit furring strip 571 to the L-shaped metal fitting 502.

As shown in FIG. 5, when the exterior wall panel 5 is assembled on a base frame (not shown), a downward veneer member 504 is attached on the extension line of the joint back furring strip 57, protruding downward from the lowest horizontal member 53 of the exterior wall panel 5. Similarly, an upward veneer member 505 is attached on the extension line of the joint back furring strip 57, protruding upward from the highest horizontal member 53 of the exterior wall panel 5. The downward veneer member 504 and the upward veneer member 505 are bendable thin metal plates with a thickness of about 0.5 mm.

When connecting the next upper exterior wall panel 5 to the exterior wall panel 5 already attached to the building frame 7, a worker on the floor of the building puts his hand behind the corner post 70 and attaches the rear-mounted plate member 572 between the downward veneer member 504 and the upward veneer member 505, as shown in FIG. 6. The rear-mounted plate member 572 is a bendable thin metal plate with a thickness of about 0.5 mm. A sealant (waterproof) adhesive is applied to the rear surface of the upper part of the rear-mounted plate member 572 and the front surface of the lower part, and the rear-mounted plate member 572 is bonded to the downward veneer member 504 and the upward veneer member 505 by this adhesive. With this bonding, the upper side of the rear-mounted plate member 572 is located on the indoor side of the downward veneer member 504, and the lower side of the rear-mounted plate member 572 is located on the outdoor side of the upward veneer member 505.

With this method of constructing exterior wall panels, exterior wall panels 5 using exterior corner wall surface materials 50A, each of whose orthogonal surfaces has a horizontal length narrower than the width of the corner post 70, can be lined up one above the other, and post-attached furring strips 571 can be attached from the indoor side to seal the gap between the upper and lower back joint furring strips 57, improving fire resistance and waterproofing. In addition, because the post-attached furring strips 571 are used, they can be easily fixed to both horizontal members 53 on the back side of the corner post 70.

The upper side of the rear-mounted plate member 572 is located on the indoor side of the downward veneer member 504, and the lower side of the rear-mounted plate member 572 is located on the outdoor side of the upward veneer member 505. Therefore, even if water trickles down from the outdoor side of the back joint furring strip 57 of the upper exterior wall panel 5, this water can be prevented from penetrating into the indoor side of the rear-mounted furring strip 571.

Although an embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to the illustrated embodiment. Various modifications and variations can be made to the illustrated embodiment within the same scope as the present invention or within an equivalent scope.

5: Exterior wall panel 7: Body 7A: Fastener 7B: Clip 50: Exterior wall surface material 50A: Exterior wall surface material for corner 50B: Flat plate exterior wall surface material 50a: Non-combustible heat insulating material 50b: Steel plate 50c: Steel plate 50d: Concave portion 50e: Convex portion 51: First vertical furring strip 52: Second vertical furring strip 53: Horizontal member 53A: Horizontal furring strip 53B: Horizontal furring strip 54: Short vertical member 56A: Locking portion 56B: Locking portion 56C: Locking portion 56D: Locking portion 57: Joint back furring strip 58: Thin vertical member 70: Corner column 501: L-shaped metal fitting 502: L-shaped metal fitting 503: Nut 504: Downward veneer member 505: Upward veneer member 506: Bolt 571 : Rear-attached furring strip 572 : Rear-attached plate member R : Indoor corner

Claims (7)

A plurality of exterior corner wall panels, each of whose orthogonal faces has a width narrower than the width of the corner post and is joined vertically;
A plurality of flat exterior wall panels joined vertically, one of whose horizontal edges is connected to the horizontal edges of each of the exterior wall panels for the protruding corners, and the other of whose horizontal edges is located laterally beyond the position of the corner post;
A first vertical furring strip is located at the indoor corner of the exterior corner material and supports each surface of the exterior corner material on two outdoor surfaces;
A second vertical furring strip is located on the other horizontal edge side of the flat exterior wall surface material and supports the other horizontal edge of the flat exterior wall surface material;
A plurality of horizontal members connecting the first vertical furring strip and the second vertical furring strip;
An exterior wall panel comprising: The exterior wall panel according to claim 1, characterized in that all or some of the multiple horizontal members have a first fastening portion that is fastened to the building body side at a position to the side of the corner post and not overlapping the corner post. The exterior wall panel according to claim 2, characterized in that the second vertical furring strip has a second locking portion that is locked to the building body near the connection point with the horizontal member having the first locking portion. The exterior wall panel according to any one of claims 1 to 3, characterized in that a joint back furring strip extending vertically on the indoor side of the connection between the exterior corner exterior wall surface material and the flat exterior wall surface material is disposed between each of the horizontal members. The method for constructing the exterior wall panels described in claim 4 that connects the exterior wall panels vertically includes a step of inserting a post-attached furring strip from the indoor side to the back side of the corner post that is located on the extension line of the back joint furring strip between the horizontal member located at the bottom of the upper exterior wall panel and the horizontal member located at the top of the lower exterior wall panel of the upper exterior wall panel, and fixing the post-attached furring strip to both horizontal members. The method for constructing an exterior wall panel according to claim 5, characterized in that the post-attached furring strip has a through hole formed in a horizontal direction in a plane parallel to the panel surface of the exterior wall panel, and fastening members passed through the through hole are fastened to fixing members attached to each of the two horizontal members. The method for constructing an exterior wall panel according to claim 5, characterized in that a post-attachment plate member is attached between a downward veneer member that protrudes downward from the lowest horizontal member of the upper exterior wall panel on the extension line of the joint back furring strip and an upward veneer member that protrudes upward from the highest horizontal member of the lower exterior wall panel, so that the upper side of the post-attachment plate member is located on the indoor side of the downward veneer member and the lower side of the post-attachment plate member is located on the outdoor side of the upward veneer member, and the post-attachment furring strip is arranged and fixed on the indoor side of the post-attachment plate member.

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