JPH10159194A - External wall structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure the waterproof performance of an external wall by butting end parts of face members of a plurality of external walls with clearance therebetween, interposing a primary waterproof seal in the clearance, and installing a secondary waterproof member on a back surface. SOLUTION: End parts of a plurality of external face members 11 are butted to each other with a clearance 13 therebetween to constitute an external wall 10. A gasket 14 as a primary waterproof seal is interposed in the clearance 13. A secondary waterproof member 16 is installed at the position corresponding to the clearance on the back side of the external face members 11, and the external face members 11 are fixed to a base material 15. The secondary waterproof member comprises a waterproof sheet 18 stretched and fixed between a pair of watertight members 17 consisting of the foaming material such as foamed urethane. The watertight member 17 can surely be kept waterproof because the back side of the external face members 11 can be abutted in a liquid-tight manner even when the back side is rugged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a building,
The present invention relates to an outer wall structure in which a plurality of outer wall materials are arranged adjacent to each other to improve waterproofness.

[0002]

2. Description of the Related Art A conventional outer wall structure is disclosed in
As shown in the publication, end portions of a plurality of outer wall materials are arranged with little but no gap therebetween to form an outer wall, and the surface of the outer wall material is coated continuously. It has been proposed (first prior art).

[0003] Another conventional outer wall structure is one in which the ends of a plurality of outer wall materials are arranged with a gap, and a gasket as a waterproof seal is interposed in the gap to form the outer wall. Has been proposed (second prior art).

[0004]

In the first prior art, there is almost no gap between the plurality of outer wall materials, and the surface of these outer wall materials is continuously coated to ensure waterproofness. However, in the case where there is a gap between the outer wall materials as in the second related art, it is not sufficient to provide waterproofing simply by interposing a waterproof seal in this gap. However, there is a possibility that the wood base material disposed on the back side of the outer wall may be corroded.

An object of the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an outer wall structure which can ensure waterproof performance of an outer wall.

[0006]

According to the first aspect of the present invention, the ends of a plurality of outer wall materials fixed to each of the base materials arranged at intervals are abutted with a gap. In the outer wall structure in which the outer wall is formed by interposing a primary waterproof sealing material in the gap, a secondary waterproof member is installed at a position corresponding to the gap, extending over the back surface side of the outer wall material. It was done.

According to a second aspect of the present invention, in the first aspect of the present invention, the secondary waterproof member is provided with a waterproof sheet between a pair of watertight members capable of abutting watertight on the back surface of the outer wall material. The waterproof sheet is disposed at a position corresponding to the gap between the outer wall materials.

According to a third aspect of the present invention, in the second aspect of the present invention, the secondary waterproof member is such that the watertight member is a foam material and the waterproof sheet is made of resin.

[0009]

The invention described in claim 1 has the following operation.
The primary waterproof seal material is interposed in the gap between the outer wall materials, and the secondary waterproof member is installed at a position corresponding to the gap by crotch on the back side of the outer wall material, so that a gap is installed on the outer wall. Even if it is, it is possible to prevent water from entering the back side of the outer wall material by the primary waterproof seal material and the secondary waterproof member,
The waterproofness of the outer wall can be ensured.

The invention according to claim 2 or 3 has the following operation. In particular, the secondary waterproofing member 14 is one in which a waterproof sheet is disposed on a pair of watertight members, and since the watertight member is in contact with the backside of the outer wall material in a watertight manner, the back surface of the outer wall material has an uneven shape. Even with this, the watertight member can prevent water from flowing out of the secondary waterproof member along the back surface of the outer wall material, and the waterproof performance of the outer wall can be further ensured.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a first embodiment of the outer wall structure according to the present invention. In an unillustrated building unit, an outer wall 10 is formed by arranging a plurality of outer wall materials (for example, hard wood piece C plates having a thickness of 12 mm). These outer wall materials 11 have their ends 12 abutted with a gap 13 therebetween, and a gasket 14 as a primary waterproof sealing material is interposed in the gap 13. The gasket 14 is made of, for example, ethylene-propylene-diene rubber (EPDM).

A backing material 15 made of, for example, wood is disposed on the back surface side of the plurality of outer wall materials 11, and a position corresponding to the gap 13 is provided between the base material 15 and the back surface of the outer wall material 11. The secondary waterproofing member 16 is installed at the second position. The outer wall material 11
It is fixed to the base material 15 arranged in the gap.

The secondary waterproof member 16 is provided between a pair of watertight members 17 made of a foam material such as urethane foam.
The waterproof sheet 18 is stretched and fixed.
Even if the back surface of the outer wall material 11 has an uneven shape, the watertight member 17 can be brought into contact with the back surface in a liquid-tight manner.
Water is prevented from flowing out of the secondary waterproof member 16 along the back surface of the first waterproof member 16. The waterproof sheet 18 is made of a resin such as oriented polypropylene (CPP) having a thickness of 0.4 mm, and is disposed at a position corresponding to the gap 13 of the outer wall material 11. In addition, the code | symbol 19 in a figure shows a painted surface.

According to the above embodiment, the following effects are obtained. The primary waterproof gasket 14 is provided in the gap 13 between the outer wall materials 11.
The secondary waterproofing member 16 is installed at a position corresponding to the gap 13 on the back surface side of the outer wall material 11. Therefore, even if the outer wall 10 has the gap 13, the primary waterproof gaskets 14 and The next waterproof member 16 can prevent water from entering the back surface side of the outer wall material 11, and can ensure waterproofness of the outer wall 10. As a result, it is possible to reliably prevent corrosion of the wood base material 15 disposed on the back surface side of the outer wall 10.

In particular, the secondary waterproofing member 16 has a waterproof sheet 18 disposed on a pair of watertight members 17. Since the watertight member 17 is in contact with the rear surface of the outer wall material 11 in a liquid-tight manner, Even if the back surface of the outer wall material 11 has an uneven shape, the watertight member 17 can prevent water from flowing out of the secondary waterproof member 16 along the back surface of the outer wall material 11, and
0 waterproof performance can be further ensured.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and the design can be changed without departing from the scope of the present invention. The present invention is also included in the present invention. For example, the waterproof sheet 18 of the secondary waterproof member 16 may be another resin such as polypropylene.

[0017]

As described above, according to the outer wall structure of the present invention, the waterproof performance of the outer wall can be ensured.

[Brief description of the drawings]

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

[Explanation of symbols]

 Reference Signs List 10 outer wall 11 outer wall material 12 end of outer wall material 13 gap of outer wall 14 primary waterproof seal gasket (primary waterproof seal material) 16 secondary waterproof member 17 watertight member 18 waterproof sheet

Claims (3)

[Claims] 1. An end of a plurality of outer wall materials fixed to each of base materials arranged at intervals is abutted with a gap, and a primary waterproof sealing material is interposed in the gap. An outer wall structure in which a second waterproof member is installed at a position corresponding to the gap so as to extend over the back surface side of the outer wall material. 2. The secondary waterproofing member according to claim 1, wherein a waterproof sheet is disposed between a pair of watertight members that can abut watertight on the back surface of the outer wall material, and the waterproof sheet corresponds to a gap between the outer wall material. The outer wall structure according to claim 1, wherein the outer wall structure is disposed on the outer wall structure. 3. The outer wall structure according to claim 2, wherein the water-tight member of the secondary waterproof member is a foam material, and the waterproof sheet is made of resin.