JP2000297517A - External wall structure for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent coming off of an external wallboard of a wall surface for a building covered with plural metal wallboards. SOLUTION: In an external wall structure for covering a wall surface of a building by assembling mutually external wallboards made of a metal board in vertical direction, each external wallboard 3 is at an upper end provided with a groove part 30 opened to a board surface side and formed in a nearly U-shaped cross section, and wherein an upper surface 31 is formed in an inclined plane such that an opening side becomes a lower position to form an angle of bend of an upper surface of the opening in an acute angle. The external wallboard 3 is at a lower end provided with a turning up part 36 turned up in a U-shape to a rear surface side, a locking surface 37 extended forming the inclined plane from a tip end of a turning up side to a diagonally upper part, and a locking part 35 which consists of a locking end part 38 extended from a tip end of the locking surface 37 to a diagonally lower part. When a first external wallboard 3A is fixed on a wall surface 2 (an external wall bed material), an opening of the groove part 30 of an upper end of the first external wallboard 3A is closed with a turning up part 36 of a locking part 35 of a second external wallboard 3B, and a locking surface 37 is piled up to the upper surface 31 of the groove part 30 to abut the locking end part 38 on a bottom surface 32 of the groove part 30 for locking fitly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer wall structure in which a metal outer wall plate is attached so as to cover a wall surface of a building.

[0002]

2. Description of the Related Art Conventionally, as an outer wall structure of a building such as a factory, a warehouse, a gymnasium or the like, a channel steel outer wall base material is provided vertically along an outer surface of an interior material such as a heat insulating material. There is one in which a plurality of horizontally long outer wall plates made of a metal plate are sequentially assembled upward and fixed, and the above-mentioned interior material is covered.

FIG. 7 shows a conventional typical outer wall structure, in which each outer wall plate 3 has the same shape and the same size, and has a substantially U-shaped groove portion 30 which is open at the upper end to the panel surface side over the entire length in the width direction. ing. The upper surface 31 of the groove 30 is an inclined surface whose lower side is the opening side, and the bending angle of the upper edge of the opening of the groove 30 is formed at an acute angle. The upper edge of the outer wall plate 3 above the groove portion 30 is provided with a fixing flange 34 which is bent substantially in a Z-shaped cross section toward the rear side of the panel. On the other hand, at the lower end of the outer wall plate 3, a lower edge is bent at an acute angle along the inclination of the upper surface 31 of the groove 30 toward the rear side of the panel, and a locking portion 35 </ b> A that locks the upper edge of the opening of the groove 30 is provided. Provided.

Then, the fixing flange 34 of the first outer wall plate 3A is screwed and fixed to the outer wall base material 2, and the first outer wall plate 3A is fixed.
A locking portion 35A at the lower end of the second outer wall plate 3B installed directly above the first outer wall material 3A is locked to the upper edge of the opening of the groove portion 30 of A, and the upper end of the second outer wall plate 3B is locked. The fixing flange 34 is screwed and fixed to the outer wall base material 2, and the outer wall plate (not shown) is sequentially assembled upward in this manner.

[0005]

By the way, when a strong wind passes along the outer wall plate 3 in a typhoon or the like, the surface side of the outer wall plate 3 becomes negative pressure, and the outer wall plate 3 is sucked out and is shown by a two-dot chain line in the figure. It bends like a bow. The groove 3
0 rises from the outer wall base material 2. Further, when the sucking is repeated, the locking portion 35A at the lower end of the outer wall plate 3 is deformed so that the bent portion is opened, and the rising inclination angle of the locking portion 35A is reduced. For this reason, the locking portion 35A is
There is a possibility that it will come off.

Therefore, it is conceivable that the bottom surface 32 of the groove 30 is screwed and fixed to the outer wall base material 2 so as to prevent the groove 30 from floating. The bend opens. In addition, the screw member is exposed from the opening of the groove 30, and the appearance of the outer wall is impaired. In addition, the screw fastening portion is corroded by the rainwater that has entered the groove portion 30.

Accordingly, an object of the present invention is to provide an outer wall structure of a building which has good workability in assembling the outer wall plate, does not easily come off, and has a good appearance.

[0008]

SUMMARY OF THE INVENTION The present invention is an outer wall structure in which a plurality of outer wall plates made of a metal plate are vertically assembled to cover a wall surface of a building, and each of the outer wall plates has a panel at an upper end thereof. A groove having a substantially U-shaped cross section that opens to the front side, a fixing flange that bends and extends in a substantially Z-shaped cross section from the upper edge of the groove to the back of the panel, and a locking portion that bends toward the rear of the panel is provided at the lower end. A second flange is provided in the groove at the upper end of the first outer wall plate in which the fixing flange is screwed and fixed to the wall surface.
The engaging portion at the lower end of the outer wall plate is fitted and locked, and the fixing flange at the upper edge of the second outer wall plate is screwed and fixed to the wall surface to fix each outer wall plate to each other. In the outer wall structure, the groove at the upper end of the outer wall plate has an upper surface formed as an inclined surface with the opening side being lower, the bending angle of the upper edge of the opening is formed at an acute angle, and the lower end of the outer wall plate is inverted to the rear side. A folded portion folded in a substantially U-shaped cross section as described above, a locking surface that is bent from the tip of the folded side and extends obliquely upward and forms an inclined surface, and a bent shape that is bent in a V shape from the tip of the locking surface. Forming the above-mentioned locking portion comprising a locking end portion extending downward,
The locking portion of the second outer wall plate closes the opening of the groove of the first outer wall plate with the folded portion, the locking surface overlaps the upper surface of the groove, and the locking end is the groove. The first outer wall plate is configured to be brought into contact with the bottom surface of the first outer wall plate to be fitted and locked (claim 1). When the second outer wall plate is sucked out, the reaction force that the locking surface of the locking portion receives from the upper surface of the groove portion of the first outer wall plate is distributed to the folded portion of the locking portion,
The locking surface is prevented from opening. Further, even if the locking portion of the second outer wall plate is to be disengaged from the groove of the first outer wall plate by a large sucked force, the locking surface is locked downward at the locking end portion to the bottom surface of the groove. Because it does not fall, it does not come off. Further, since the folded portion closes the groove at the boundary between the outer wall plates, the outer wall has a good appearance.

At the lower rear surface of each of the outer wall plates, a reinforcing plate having a locking portion fitted at the lower end to the locking portion of the outer wall plate and having a projection extending to the rear side at the upper end is fitted. And
The locking portion of the second outer wall plate is fitted and locked into the groove of the first outer wall plate via the locking portion of the reinforcing plate, and the tip of the projection of the reinforcing plate is connected to the first outer wall. It is made to closely approach the fixed flange of the plate (claim 2). The engaging portion of the outer wall plate is reinforced by the reinforcing plate, and even if a pulling load is applied to the groove portion of the first outer wall plate from the second outer wall plate and the groove portion rises, the protrusion at the upper end of the reinforcing plate. Abuts against the upper end of the first outer wall plate to suppress the floating of the groove.

In each of the outer wall plates, together with the fixing flange at the upper end, the bottom surface of the groove is screwed and fixed to the wall surface of the building. The lifting of the groove of the outer wall plate is reliably prevented. The screw member on the bottom surface of the groove is not exposed by the folded portion closing the opening of the groove and is not exposed to rainwater.

[0011]

FIG. 1 shows a first embodiment of the present invention.
A description will be given based on FIG. As shown in FIG. 3, the wall surface of the building on which the outer wall plate 3 is to be assembled has a substantially C-shaped cross-section that is erected in a horizontal direction between pillars (not shown) that are erected at predetermined intervals.
An inner wall material 1 is fixed to a rim 4 made of a channel steel material having a V-shape by hook bolts 5, and an outer wall base material 2 made of a channel steel material having a hat-shaped cross section is formed on the surface of the inner wall material 1 in the longitudinal direction. It is provided in. The outer wall base material 2 has its flanges on both sides fixed to the body edge 4 via the interior material 1 by screwing with bolt members 6. Then, the outer wall plate 3 is
One by one is fixed to the outer wall base material 2 to cover the wall surface.

Each outer wall plate 3 has the same shape and the same dimensions. The outer wall plate 3 is made of a thin (about 1 mm) metal plate, and has a long rectangular shape. The upper portion of the outer wall plate 3 has the same shape as that of the conventional structure, and has a groove 30 and a fixing flange 34 formed over the entire length in the width direction. The groove portion 30 is formed in a substantially U-shaped cross section that bends the panel surface of the outer wall plate 3 and projects to the rear side, and the panel surface side is open. The upper surface 31 of the groove 30 is an inclined surface with the opening side lower, and the upper edge of the opening of the groove 30 has an acute bending angle. The bottom surface 32 is formed as a vertical surface, and the lower surface 33 is an inclined surface whose lower side is the opening side corresponding to the upper surface 31.

The fixing flange 34 is formed so as to be bent substantially in a Z-shape in cross section from the upper edge of the opening of the groove 30 to the back side of the panel. The protrusion of the fixing flange 34 to the rear side is the groove 30.
Approximately, the fixing flange 34 forms a common vertical plane with the bottom surface 32. Further, the fixed flange 34 is reinforced by providing a hem 341 whose upper edge is folded back to the front side and a rib 342 having a substantially mountain-shaped cross section with a middle portion slightly protruding toward the front side.

The lower end of the outer wall plate 3 is formed with a locking portion 35 which can be locked in the groove portion 30. The locking portion 35 is formed by bending the lower end of the outer wall plate 3 to the rear side, so that approximately 18
There is provided a folded portion 36 which is folded in a substantially U-shaped cross section so as to be inverted by 0 °. The folded portion 36 is opposed to the lower end of the outer wall plate 3 in parallel with a slight space therebetween, and the folded size of the folded portion 36 is substantially the same as the opening width of the groove 30.

The upper surface 3 of the groove 30 extends from the tip on the folded side.
An inclined locking surface 37 extending obliquely upward along the line 1 is formed. The locking surface 37 adjusts the inclination angle of the groove 3
The angle of the upper surface 31 is almost the same as that of the upper surface 31 or slightly closer to the vertical direction than the inclination angle of the upper surface 31. The width of the locking surface 37 is smaller than the width of the upper surface 31. Further, a locking end portion 38 is formed, which is bent obliquely downward from the tip of the locking surface 37 toward the bottom surface 32 of the groove portion 30 in a substantially U-shaped cross section.

At the time of assembling the outer wall plate 3, the fixing flange 34 at the upper end of the first outer wall plate 3A is screwed and fixed to the outer wall base material 2 with the tapping screw 7. And
Second outer wall plate 3 installed directly above first outer wall plate 3A
The locking portion 35 at the lower end of B is locked in the groove 30 of the first outer wall plate 3A. The locking portion 35 has its locking surface 37 and locking end 38 fitted through the opening of the groove 30, and the tip of the locking end 38 abuts against the bottom surface 32 of the groove 30, and the locking surface 37 has an upper surface. 31 and locks the second outer wall plate 3
The fixing flange 34 at the upper end of B is screwed and fixed to the outer wall base material 2 with the tapping screw 7. in this way,
This operation is sequentially repeated from the bottom to the top to obtain a plurality of
Are fixed to each other to cover the wall surface. The opening of the groove 30 of the first outer wall plate 3A is closed by the folded portion 36 of the second outer wall plate 3B. Although not shown, the lowermost outer wall plate has its lower end engaging portion fixedly engaged with a drainer attached to the boundary between the building foundation and the wall surface. The upper end of the outer wall plate is located near the eaves of the roof, and is flattened by covering the fixed flange at the upper end and a cover member integrally covering the groove.

In the case of a strong wind such as a typhoon or the like, the outer wall plate 3
Is negative pressure, and each outer wall plate 3 is sucked out and bent in a bow shape. When the second outer wall plate 3B bends in this manner, the second outer wall plate 3B
The locking portion 35 of the outer wall plate 3B is pulled obliquely upward and outward, and the locking surface 37 of the locking portion 35 receives a large reaction force from the upper surface 31 of the groove 30 of the first outer wall plate 3A. However, this reaction force is distributed to the folded portion 36 of the locking portion 35. In addition, since the leading edge of the locking end 38 is in contact with the bottom surface 32 of the groove 30, the locking end 38 serves as a support to prevent the locking portion 35 from coming out of the groove 30.

The locking portion 35 has a folded portion 36
Since the opening of the groove portion 30 is closed by the above, a continuous surface without a groove can be formed at the boundary between the first and second outer wall plates 3A and 3B, and the appearance of the outer wall can be improved.

Next, a second embodiment of the present invention will be described with reference to FIGS. This is because the reinforcing plate 9 is attached to the locking portion 35 of the outer wall plate 3 of the previous embodiment, and the locking portion 35
And the groove 30 is further strengthened in the locking force. The locking portion 35 of the outer wall plate 3 has the same structure as that of the previous embodiment, and a description thereof will be omitted.

The reinforcing plate 9 is a thin and narrow metal plate, and is fitted to the back of the lower end of the second outer wall plate 3B. The lower end of the reinforcing plate 9 has a cross-sectional shape along the locking portion 35 of the outer wall plate 3 and has a folded portion 91 folded in a U-shape, and an inclined locking surface 92 from the tip thereof along the locking surface 37 of the outer wall plate 3. It has. A projection 93 is formed at the upper end of the reinforcing plate 9 so as to bend in a rectangular shape toward the rear side and to extend gently upward. Reinforcement plate 9
Is fitted into the folded portion 36 of the outer wall plate 3 and the locking surface 92 is overlapped with the locking surface 37 of the outer wall plate, and is attached to each outer wall plate 3 in advance. And FIG.
As shown in (1), the engaging portion 35 of the second outer wall plate 3B is engaged with the groove 30 of the first outer wall plate 3A via the reinforcing plate 9. At this time, the protrusion 93 faces the fixing flange 34 of the first outer wall plate 3A at a small interval.

When the first and second outer wall plates 3A and 3B are sucked out, the groove 30 of the first outer wall plate 3A is sucked out and tends to float. Accordingly, the first outer wall plate 3A
The vertical portion 39 rising from the groove portion 30 tends to tilt because its lower end moves outward, but the first projection 93 at the tip of the reinforcing plate 9 integrated with the vertical portion 39 is fixed to the outer wall base material 2. Of the outer wall plate 3A, the vertical portion 39 is prevented from tilting, so that the groove portion 30 is prevented from floating. Further, since the locking portion 35 of the second outer wall plate 3B has a double structure with the reinforcing plate 9, the rigidity is enhanced, and the first outer wall plate 3A is prevented from coming off from the groove 30.

FIG. 6 shows a third embodiment of the present invention.
In the present embodiment, the basic structure is almost the same as that of the first embodiment, but the upper end of each outer wall plate 3 is fixed to the bottom surface 32 of the groove 30 together with the fixing flange 34 by the outer wall base material 2.
It is fixed with screws. That is, the first outer wall plate 3
A, the fixing flange 34 at the upper end is screwed to the outer wall base material 2 by the tapping screw 7, and the bottom surface 32 of the groove 30 is further screwed to the outer wall base material 2 by the tapping screw 7.
To secure it.

According to the present embodiment, even if the first and second outer wall plates 3A and 3B are sucked, the first outer wall plate 3A
The groove 30 does not float. Since the opening of the groove 30 is closed by the folded portion 36, the tapping screw 7 does not appear in the appearance and does not impair the appearance of the outer wall.
Further, since the rainwater is prevented from entering into the groove 30 by the folded portion 36, the tapping screw 7 due to the rainwater is prevented.
No corrosion occurs.

[0024]

According to the outer wall structure of the present invention, the workability of assembling the outer wall plate is good and there is no possibility that the outer wall plate will come off due to a strong wind or the like. Further, the appearance of the outer wall is improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of an outer wall structure of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a perspective view of an outer wall structure according to the first embodiment.

FIG. 4 is a perspective view of a reinforcing plate used in a second embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a main part of an outer wall structure according to the second embodiment.

FIG. 6 is a longitudinal sectional view of a main part of a third embodiment of the present invention.

FIG. 7 is a longitudinal sectional view of a conventional outer wall structure.

[Explanation of symbols]

 Reference Signs List 2 wall surface of building (outer wall base material) 3 outer wall plate 3A first outer wall plate 3B second outer wall plate 30 groove portion 31 upper surface of groove portion 32 bottom surface of groove portion 34 fixing flange 35 locking portion 36 folded portion 37 locking surface 38 Locking end portion 7 Screw member 9 Reinforcement plate 91 Locking portion (return portion) 92 Locking portion (locking surface) 93 Projection portion

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E110 AA42 AB04 AB22 BC03 CA09 CC04 DA03 DA10 DA15 DB14 DB21 DB27 DC01 DC12 GA31Y GA33W GA33X GB01W GB02Y

Claims (3)

[Claims] 1. An outer wall structure in which a plurality of outer wall plates made of a metal plate are vertically assembled to cover a wall surface of a building. A groove formed in the shape of a letter, and a fixing flange extending in a substantially Z-shaped cross section from the upper edge of the opening of the groove to the panel rear side, and a locking portion bent at the lower end to the panel rear side. The locking portion at the lower end of the second outer wall plate is fitted and locked in the groove at the upper end of the first outer wall plate fixed by screwing, and the fixing flange at the upper edge of the second outer wall plate is attached to the wall surface. In the outer wall structure of a building in which each outer wall plate is fixed to each other by screwing and fixing, the groove at the upper end of the outer wall plate has an upper surface formed with an inclined surface whose lower side is the opening side, and the bending angle of the upper edge of the opening is sharpened. Formed at the lower end of the outer wall plate, A folded portion that is folded in a substantially U-shaped cross section so as to roll, a locking surface that bends from the end on the folded side and extends obliquely upward to form an inclined surface, and a bent shape that is bent from the end of the locking surface. Forming the locking portion consisting of a locking end portion extending obliquely downward, and closing the locking portion of the second outer wall plate with an opening of the groove of the first outer wall plate with the folded portion; A building having a structure in which a locking surface is overlapped with an upper surface of the groove, and the locking end is brought into contact with a bottom surface of the groove to be fitted and locked in the groove of the first outer wall plate. Exterior wall structure. 2. A reinforcing plate having a lower end formed with a locking portion to be fitted to the locking portion of the outer wall plate and a projection formed at the upper end on the lower back surface of the outer wall plate. The engaging portion of the second outer wall plate is fitted and engaged with the groove portion of the first outer wall plate via the engaging portion of the reinforcing plate. The outer wall structure of a building according to claim 1, wherein the outer wall structure is closely opposed to a fixing flange of the first outer wall plate. 3. The external wall structure of a building according to claim 1, wherein each of said external wall plates has a bottom surface of said groove along with said fixing flange at an upper end and is screwed and fixed to a wall surface of said building.