JPH0476137A - Waterproof construction for outer wall - Google Patents

Abstract

PURPOSE:To improve the extent of water resistance by installing a horizontal water proofing zone in a horizontal joint part after passing through a cross joint part, while cutting a vertical waterproofing zone of a vertical joint pat at a spot being crossed with the horizontal waterproofing zone, and installing a water-resistant filler in space between the vertical joint zone and the horizontal joint zone. CONSTITUTION:A vertical waterproofing zone 4 is inserted into a vertical joint 2 between an outer wall 1 of a housing unit at the upstairs and another outer wall 1 of a housing unit at the downstairs from the outdoor side, while a verti cal fire resisting body 6 is inserted from the indoor side, respectively. Next, the housing unit is carried to a construction site, and a first floor unit is installed on the foundation. Then, a water-resistant filler 9 is filled up in and on a cylinder of the vertical waterproofing zone 4 so as to protuberate, laying down another water-resistant filler 8 on the filler 9. Likewise, a second floor unit is mounted on the first floor unit so as to make both first-floor vertical joints turn to a straight line, thereby forming a cross joint.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a waterproof structure for joints in outer walls of buildings.

In particular, the present invention relates to a waterproof structure for joints in outer walls suitable for prefabricated houses.

(Prior Art) Various waterproof structures for buildings have been proposed, but as described in Japanese Patent Laid-Open No. 55-138528, a waterproof band such as a gasket is installed between the outer walls. This structure is widely used because it is easier to construct and faster to finish than plastering with cement mortar, etc., and there is no cracking when it dries after construction.

In particular, this structure in which a waterproof band such as a gasket is provided is suitable for assembled housing.

In other words, prefabricated housing is a box-shaped housing unit of a certain size that can be transported, with finished interiors and exteriors, which are manufactured in advance at a factory, and multiple units are transported to a construction site and assembled on site. , housing.

As described above, since this prefabricated house is finished in advance for each housing unit at the factory, it is necessary to quickly provide waterproof belts at the joints of the exterior walls of this housing unit.

In structures that are waterproofed by applying cement mortar, etc., it takes a long time for the cement mortar to harden and the waterproofing is completed, but with waterproof structures that include a waterproof band such as a gasket, simply inserting a gasket, etc. Since it is completed, it can be completed extremely quickly and is suitable for factory production.

(Problem to be solved by the invention) However, the waterproof performance of the structure in which a waterproof band such as a gasket is provided at the joint between two external walls is quite good, but the horizontal joints of the vertically adjacent external walls The waterproof structure at the cross-joint area, which is the intersection point between the waterproof belt provided at the outer wall and the waterproof belt provided at the vertical joints of the adjacent outer walls on the left and right, poses a difficult problem because the two intersect.

That is, when a waterproof band such as a gasket is inserted between the horizontal joint portion and the vertical joint portion, either the two overlap or it is necessary to cut one of the gaskets at this intersection point. If they are overlapped or cut in this way, rainwater tends to leak between them, and a satisfactory waterproofing effect cannot be expected.

Particularly in assembled housing, since each housing unit is finished in a factory, a waterproof band such as a gasket is provided for each housing unit, so the gasket is cut at the boundary between the upper and lower floors.

Therefore, the waterproof structure at the boundary between the upper and lower floors is particularly important.
becomes important.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a waterproof structure with no defects in the cross joint where the vertical joint and the horizontal joint intersect.

(Means for Solving the Problems) The present invention has been made to solve the above problems and achieve the above objects. A waterproof structure at a cross joint where a waterproof belt intersects with a vertical waterproof belt provided at a vertical joint between the left and right adjacent outer walls, and the horizontal waterproof belt at the horizontal joint crosses the cross joint. The vertical waterproof belt of the vertical joint portion is cut at the point where it intersects with the horizontal waterproof belt, and a water-resistant filler is placed in the gap between the upper end of the cut vertical waterproof belt and the horizontal waterproof belt. is established.

In the present invention, the horizontal joint part has an outer wall at the top, and by shaping this outer wall into an appropriate eaves shape, it can function as an eaves, making it difficult for rainwater to enter the horizontal joint part. The horizontal waterproof belt at the horizontal joint can be waterproofed from rainwater, etc., even if the vertical waterproof belt does not have perfect watertightness. Therefore, this horizontal waterproof belt may be made of a highly waterproof material such as natural rubber, synthetic rubber, or soft vinyl chloride resin; It may also be impregnated with an anti-inflammatory fluid.

In the present invention, the vertical waterproof belt at the vertical joint is important in terms of waterproof performance, and what is usually called a gasket is inserted into the joint.

The material for this gasket is preferably one that is flexible and elastic, since it needs to come into close contact with the side surface of the outer wall when inserted into the joint. As such materials, conventionally used materials such as rubbers such as natural rubber and synthetic rubber, synthetic resins such as soft vinyl chloride resin, or combinations of these and metals can be used as they are.

Among these, synthetic rubbers with good weather resistance such as EPDM (ethylene-propylene diene-methylene copolymer) and butyl rubber are preferred.

The shape of such a gasket may be any shape as long as it is filled along the joints and creates a watertight space between the gasket and the side surface of the outer wall, but generally it is a cylindrical gasket or a long gasket with a tower-shaped cross section. gaskets are commonly used.

The water-resistant filler used in the present invention is a material that is filled into the gap between the horizontal joint and the tip of the vertical joint to make this part watertight, and is made of a material such as caulking material, sealant, putty, etc. However, in the present invention, in addition to these materials, flexible and elastic rubbers such as butyl rubber and natural rubber can also be used in the form of a plate.

Furthermore, these water-resistant fillers may be used alone or in combination.

Also, if the gasket inserted into the vertical joint is cylindrical,
This cylindrical hollow part is filled with caulking material, sealing material, putty, etc. to prevent rainwater from entering inside, and furthermore, if an elastic material such as butyl rubber is filled on top of the putty, etc., waterproof performance is achieved. further improves.

In addition, by providing a heat-resistant tropical zone on the indoor side of the waterproof belt of the present invention, the heat resistance improves, and at the same time, this area becomes airtight, so water droplets due to air currents do not flow to the indoor side, and furthermore, Waterproofing performance is improved, resulting in an extremely high-performance exterior wall.

(Function) In the present invention, there is a horizontal waterproof belt at the side joint, so there is no water leakage.

Furthermore, waterproof performance can be improved by forming the lower end of the outer wall above the horizontal joint into an eave shape.

Also, since there is a vertical waterproof belt at the vertical joint, there is no leakage.

Further, at the cross joint part which is the intersection of the vertical joint part and the horizontal joint part, a horizontal waterproof belt is provided passing through the cross joint, and
Although the vertical waterproof belt is cut at the point where the vertical joints intersect, a water-resistant filler is provided in the gap between the upper end of the vertical joint and the horizontal joint, so rainwater will not leak from here.

Therefore, this waterproof structure of the outer wall can completely prevent rainwater.

In addition, horizontal joints usually occur at the boundary between the upper and lower floors, and at this boundary, the vertical joint of the present invention is cut at the point where it intersects with the horizontal waterproof belt. There is no need to provide a continuous long vertical waterproof belt from the upper floor to the lower floor, and it is sufficient to provide four separate vertical waterproof belts, making construction easy.

Particularly in the case of prefabricated housing, a vertical waterproof strip is installed on the outer wall of each housing unit at the factory in order to finish the housing units at the factory. The waterproof structure of the outer wall of the present invention can be easily applied to this prefabricated house.

That is, as described above, the housing units with vertical waterproof strips installed on the outer walls of each housing unit at the factory are transported to the construction site, the housing units on the lower floor are installed first, and water-resistant filler is applied to the tips of the vertical waterproof strips. The outer wall waterproof structure of the present invention is completed by providing a horizontal waterproof belt on top of this so as to pass through the vertical joint, and then installing an upper floor housing unit on top of this. As described above, the waterproof structure of the outer wall of the present invention is particularly suitable for prefabricated houses and has good workability.

(Example) Next, an example of the present invention will be described with reference to the drawings.

The drawings show one embodiment of the waterproof structure of the present invention applied to an assembled house. Figure 1 is a cross-sectional view of the cross-joint part of the house cut at the vertical joint, and Figure 2 is a side view of the house. be.

Figures 3 and 4 show the cross joint part under construction of the waterproof structure of the present invention, Figure 3 is a perspective view showing the upper part of the vertical joint of the housing unit on the lower floor, and Figure 4 is the horizontal waterproofing structure. It is a perspective view showing the state where a belt is attached.

In the figure, A indicates a prefabricated house.

1 is the outer wall of prefabricated house A. This outer wall 1 is made of ALC, and the size of the largest outer wall 1 among the outer walls 1 is 2655 mm x 309 mm, and the thickness is 100 mm.
It is mm. As shown in FIG. 1, the lower end of the outer wall of the upper floor has an outer surface that hangs down slightly to function as an eaves. Further, the outer surface of the upper end of the outer wall 1 on the lower floor is slightly shaved to match the shape in which the lower end of the outer wall on the upper floor hangs down. If the lower end of the outer wall 1 on the upper floor hangs down in this way, it becomes difficult for rainwater to enter the horizontal joints.

2 is a vertical joint of the outer wall 1, and 3 is a horizontal joint of the outer wall 1.

4 is a vertical waterproof belt, which is a cylindrical EPD with a diameter of 10 mm.
Consists of M gasket.

As shown in Figure 1, the upper end of the waterproof belt 4 on the lower floor is bent toward the indoor side, so that even if rainwater falls along the waterproof belt 4 on the upper floor, it will not fall into the room. .

5 is a horizontal waterproof band, which is a band of open-cell urethane foam impregnated with liquid butyl polymer.

6 is a vertical refractory belt made of rod-shaped ceramic fibers.

7 is a horizontal refractory belt, which is made of rod-shaped ceramic fibers.

8 is a water-resistant filler made of butyl rubber tape.

9 is a water-resistant filler made of non-drying putty.

Next, the construction method for this outer wall will be explained.

First, the upper floor housing unit and the lower floor housing unit are manufactured in a factory.

At this time, a gasket, which is a vertical waterproof belt 4, is inserted from the outdoor side into the vertical joint 2, which is the boundary between the outer walls 1 of these housing units, and a ceramic fiber, which is a vertical fireproof belt 6, is inserted from the indoor side. Insert it from the top and attach these to the housing unit.

Next, this housing unit is transported to the construction site, and the first floor housing unit is first installed on the foundation that has been provided in advance.

The upper part of the vertical joint of this first floor residential unit is in the state shown in FIG.

Next, as shown in FIG. 4, a non-drying putty 9, which is a water-resistant filler, is filled into and on top of the cylinder of the gasket 4 so as to bulge.

Furthermore, butyl tape 8, which is a water-resistant filler, is laid on top of this non-drying putty 9.

Next, a second floor housing unit is placed on top of this first floor housing unit so that the vertical joints on the first floor and the vertical joints on the second floor are in a straight line, creating a cross joint, and the exterior wall of the present invention The waterproof structure is completed.

In the case of a three-story prefabricated house, the third floor housing unit may be placed on top of the second floor housing unit in a similar manner.

Next, the waterproofing effect of this outer wall 1 will be explained.

When rainwater falls on the outer wall 1 of the second floor, it falls along the outer wall 1 and reaches the horizontal joint 3 at the boundary between the first and second floors.

The lower end of the outer wall 1 of this horizontal joint 2 has an eave shape, so rainwater falling from here reaches the outer wall 1 of the first floor directly.
Rainwater may fall into the room due to wind, etc. Then, since there is a horizontal waterproof belt 5 on the indoor side of this horizontal joint 3, rainwater does not enter from here to the back.

Further, rainwater falling on the vertical joint 2 on the second floor falls along the vertical waterproof belt 4 of the vertical joint 2, and reaches the cross joint at the boundary between the first and second floors.

Since the upper end of the vertical waterproof belt 4 on the first floor at this cross joint is bent toward the indoor side, rainwater that falls along the vertical waterproof belt 4 on the second floor falls directly from here to the vertical waterproof belt 4 on the first floor. However, rainwater may fall onto the indoor side due to wind or other factors. However, here, there are horizontal waterproofing strips 5 and water-resistant fillers 8 and 9 between the horizontal waterproofing strip 5 and the upper end of the vertical waterproofing strip 4, and there is no gap between them, so rainwater does not enter the room. Instead of going inside, it ends up falling over the vertical waterproof belt 4 on the first floor.

As described above, the waterproof structure of the outer wall of the present invention is extremely easy to construct and has good waterproof performance.

(Effect of the invention) In the present invention, a water-resistant filler is provided in the gap between the upper end of the vertical waterproof belt and the horizontal waterproof belt at the cross joint where the vertical joint and the horizontal joint intersect, so that rainwater does not enter. The result is an exterior wall with excellent water resistance.

Further, since the vertical waterproof belt is cut at the cross joint and the horizontal waterproof belt is placed above this, the waterproof belt is easy and convenient to construct.

[Brief explanation of the drawing]

The drawings show one embodiment of the waterproof structure of the present invention applied to an assembled house. Figure 1 is a cross-sectional view of the cross-joint part of the outer wall of the house cut at the vertical joint, and Figure 2 is a side view of the house. It is a diagram. Figures 3 and 4 show the construction in progress; Figure 3 is a perspective view of the upper part of the vertical joint of the housing unit on the lower floor, and Figure 4 shows the horizontal waterproof strip being installed. FIG. A-・----House 1-- -Outer wall 2-, -1 Vertical joints Horizontal joints Vertical waterproof belt Horizontal waterproof belt Vertical fireproof belt Horizontal fireproof belt Waterproof filler

Claims (1)

[Claims] (1) A cross joint area where the horizontal waterproof belt provided at the horizontal joint between the vertically adjacent external walls intersects with the vertical waterproof belt provided at the vertical joint between the left and right adjacent external walls. In the waterproof structure, the horizontal waterproof belt of the horizontal joint part is provided passing through the cross joint part, and the vertical waterproof belt of the vertical joint part is cut at a point where it intersects with the horizontal waterproof belt, and this cutting In the gap between the top of the vertical grain zone and the horizontal grain zone,
A waterproof structure for the exterior wall characterized by the provision of a water-resistant filling material.