JPS63210328A - Waterproof structure of outer wall - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a waterproof structure for an outer wall of a building.

[Prior Art] Generally, the butting portions of upper and lower exterior wall panels of a building, the butting portions of left and right exterior wall panels, the joints between exterior wall panels and floor panels,
Joints between exterior wall panels, roofs, eaves, etc. must be designed to prevent water from entering. BACKGROUND ART Conventionally, as a waterproof structure for an external wall, a structure has been proposed in which the water sealing part of the external wall is covered with a waterproof sheet, as described in Japanese Patent Publication No. 58-4ESTS.

[Problems to be Solved by the Invention] However, the waterproof sheet attached to cover the main sealing part of the outer wall is difficult to install when the waterproof sheet is attached, or when a decorative cover is attached to cover the waterproof sheet. Occasionally, localized damage may be accidentally caused by nails, screwdrivers, etc. As a result, the waterproof sheet covers the main sealing portion of the outer wall with local perforations, making it impossible to provide the expected waterproof effect.

SUMMARY OF THE INVENTION An object of the present invention is to reliably make the outer wall main sealing part waterproof even if the waterproof sheet is damaged during construction.

[Means for Solving the Problems] The present invention provides a waterproof structure for an outer wall in which a main sealing portion of the outer wall is covered with a waterproof sheet, in which the waterproof sheet covers a support body,
It consists of a flow agent supported on a support.

[Function] According to the present invention, the outer wall main sealing portion is covered with a waterproof sheet to prevent rainwater from entering. Here, the waterproof sheet according to the present invention has a self-closing property against holes because the support carries a fluidizing agent. Therefore, even if the waterproof sheet is damaged during construction and a hole is formed in a local part of the waterproof sheet, the L-enlarged hole can be closed immediately or temporarily by the flow of the flow agent. Thereby, the waterproof sheet reliably waterproofs the water sealing portion of the outer wall.

[Example] Fig. 1 is a sectional view showing the main parts of a building structure to which an embodiment of the present invention is applied, Fig. 2 is a sectional view showing an expected path of rainwater infiltration in the building structure, and Fig. 3 4 is a sectional view showing a building structure to which an embodiment of the present invention is applied, and FIG. 4 is a sectional view showing a waterproof sheet.

The building 10 is a unit building having a wooden wall structure, and is constructed by joining a lower building unit (second floor part) 12 to the upper part of a lower building unit (first floor part) 11. 1st
3 to 3 show the joint between the wall panel 13 of the lower building unit 11 and the wall panel 14 of the lower building unit 12.

The wall panel 13 of the lower building 22) 11 consists of an upper frame 15, a vertical frame 16, a lower frame (not shown), an outer wall material 17, and an inner wall material 18, and the outer surface of the outer wall material 17 is coated with a painted surface 19. It is said that

The wall panel 14 of the building unit 12 includes an upper frame (not shown),
Vertical frame 20, lower frame 21. It consists of an outer wall surface material 22 and an inner wall surface material 23, and the outer surface of the outer wall surface material 22 is a painted surface 24.

In Figure 1, 25 is the floor material, 26 is the end joist, and 27 is the floor material.
is the connecting frame. The upper frame 15 and lower connecting frame 27 of the wall panel 13 have corresponding bolt holes 28A and 28B, respectively.
and are fastened with bolts 29.

Wall panel 13 of lower building unit 11 and lower building unit 1
The area around the joint of the second wall panel 14 corresponds to the outer wall main sealing part in the present invention, and is provided with a waterproof structure consisting of flexible waterproof sheets 30, 31, a backing 32, and a decorative cover 33.

The waterproof sheet 30 is attached along the upper surface of the E frame 15, the upper end surface of the outer wall material 17, and the outer surface of the outer wall material 17 when manufacturing the lower building unit 11. The backing 32 has a double-sided adhesive tape on its lower surface, and is pasted to the upper surface of the waterproof sheet 30 with the double-sided adhesive tape before the lower building unit 11 and the upper building unit 12 are joined. When the lower building unit 12 is manufactured, the waterproof sheath 31 is held between the end joists 26, the connecting lower frame 27, and the exterior wall surface material 22, and its lower end is shown by the two-dot chain line in FIG. It is bent and temporarily held on the outer surface side of the outer wall surface material 22 as shown in FIG.

In other words, in the above building IO, the lower building unit) 1
1 and the building unit 12, the waterproof sheet 30
The backing 32 is pressed between the wall panel 13 of the lower building unit 11 equipped with a waterproof sheet 31 and the wall panel 14 of the lower building unit 12 equipped with a waterproof sheet 31, and then the lower end side of the waterproof sheet 31 is Next, the mounting member 34 is attached to the outer wall surface material 22 of the lower building unit 12 by the nail 3, which is attached to the outer surface of the waterproof sheet 30 hanging from the two-dot chain line shown in FIG.
5, and the upper end of the decorative cover 33 is attached to this cover attachment member 34 with I-thread screws 37.

The lower end of the decorative cover 33 is attached to the outer wall surface material 17 of the lower building unit 11 with set screws 38. makeup cover 3
3 extends in the horizontal direction facing the joint of the lower building unit 11 and the upper building unit) 12, and connects both building units) 11.12
Cover the outermost part of the water seal on the outer wall.

Here, the above waterproof sheet) 30.31 is vulcanized butyl rubber (Young's modulus is 2X to 5 to 8X
10'd7ne/cm2);
A flow agent 40 made of non-vulcanized butyl rubber supported on a support 39. The support body 39 can be formed of vulcanized butyl rubber, other rubber sheets, synthetic resin films, non-water permeable flexible materials such as metal foils, or flexible materials such as woven fabrics and non-woven fabrics. The agent 40 is used so as to face the inner surface of the building 10. The flow agent 40 is applied to the tarpaulin sheets 30.31 caused by damage caused to the tarpaulin sheets 30.31 by nails, screwdrivers, etc.
It has a self-closing property that immediately or temporarily closes the hole by its flow. Additionally, if the support is made of a flexible material with elasticity, such as vulcanized butyl rubber or other rubber sheets, the elasticity will close any holes that may occur, making it even more desirable from a waterproof perspective. The zero elastic modulus (Young's modulus) is lXIO3~1xlO1od!
A range of nelC layer 2 is preferable.

As the flow agent 40, in addition to non-vulcanized butyl rubber, adhesive rubber, synthetic resin such as acrylic resin, urethane resin, etc.
A self-closing material such as natural resin can be used.

Note that the self-closing property of the flow agent L 40 can be specified by the following physical properties (viscosity, etc.) of the flow agent 40. The viscosity is preferably in the range of 104 to 10 t'poise from the viewpoint of self-closing properties.The thickness of the flow agent 40 has a correlation with the viscosity, and those with low viscosity exhibit self-closing properties even if they are thin, and those with high viscosity requires thickness. The thickness of the flow agent 40 is 0.
．． The range of 1"lhs+ is preferable, and more preferably 0
．． The preferable range is 2 to TII layers.

In addition, the lower unit to which the above-mentioned waterproof sheet 30 is attached)
The outer surface of the outer wall surface material 17 in 11 is smooth coated with 11941
has been applied and smoothed. That is, the smooth coating film 41
The unevenness of the painted surface 19 applied to the outer surface of the outer wall surface material 17 is smoothed out so that the waterproof sheet 30 can be closely attached to the outer wall surface material 17 of the lower building unit 11 without leaving any minute gaps. .

Here, the smooth coating films 41. which will be attached to each other as described above. Each lower end portion 41E, 30E, 31E of the waterproof sheet 30 and the waterproof sheet 31 has a diameter of 4 as shown in FIG.
It is preferable to set 1E to be the longest and 31E to be the shortest. According to this, each lower end part 41E, 30E, 31E is difficult to separate from each other.

Next, the operation of the above embodiment will be explained.

According to the above embodiment, the outer wall main sealing portion of the building 10 is water-sealed by the waterproof sheet 30, 31, the backing 32, and the decorative cover 33. By the way, according to the feng shui experiments conducted by the present inventors, the routes A to G in FIG. 2 are conceivable as possible routes for the intrusion of outside water into the above-mentioned water sealing portion of the outer wall of the building 10. Here, route A is sealed with a waterproof sheet 30, and routes B, C, and D
is sealed by a waterproof seal) 30 and a backing 32,
Paths E and F are sealed by a waterproof sheath 31 and a backing 32, and path G is sealed by a waterproof sheath 31.

Since the waterproof sheets 30 and 31 carry the flow agent 40 on the support 39, they have self-closing properties against holes. Therefore, even if the waterproof sheet 30.31 is damaged during construction or the like and holes are formed locally in the waterproof sheet 30.31, the holes are immediately or temporarily closed by the flow of the flow agent 40. As a result, the waterproof seals 30 and 31 reliably waterproof the outer wall water seal portion.

The waterproof structure of the present invention is widely applicable to exterior wall water sealing parts such as joints between exterior wall panels and floor panels, joints between exterior wall panels and roofs, eaves, etc. in building structures.

[Effects of the Invention] As described above, according to the present invention, even if the waterproof sheet is damaged during construction, the damage is healed by the flow of the flow agent of the waterproof sheet, and the outer wall is completely sealed. can be reliably waterproofed.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the main parts of a building structure to which an embodiment of the present invention is applied, FIG. 2 is a cross-sectional view showing an expected path of rainwater infiltration in the building structure, and FIG. FIG. 4 is a sectional view showing a building structure to which one embodiment is applied, and FIG. 4 is a sectional view showing a waterproof sheet. lO...Building, 13.14...Wall panel, 30.3
DESCRIPTION OF SYMBOLS 1... Waterproof sheet, 39... Support body, 40... Flow agent. Patent applicant Sekisui Chemical Co., Ltd. Representative Hiroshi 1) Figure 2 Figure 3 Figure 4

Claims (3)

[Claims] (1) A waterproof structure for an outer wall in which an outer wall water seal part is covered with a waterproof sheet, wherein the waterproof sheet is composed of a support and a flow agent supported on the support. (2) The waterproof structure for an outer wall according to claim 1, wherein the flow agent has a viscosity in the range of 10^4 to 10^8 poise. (3) A waterproof structure for an outer wall according to claim 1 or 2, wherein the support is made of a flexible material having elasticity.