JP2562227B2 - Exterior wall waterproof structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a waterproof structure for a joint portion of an outer wall of a building.

In particular, the present invention relates to a waterproof structure of a joint portion of an outer wall suitable for an assembled house.

(Prior Art) Although various waterproof structures for buildings have been proposed,
As described in JP-A-55-138528, a structure in which a waterproof band such as a gasket is provided between the outer wall and the outer wall,
Construction is easier than applying cement mortar,
It is widely used because it is finished quickly and is dry after construction without cracks.

In particular, the structure provided with a waterproof band such as this gasket is suitable for an assembled house.

In other words, an assembled house is a box-shaped house of a certain size that can be transported, and the house units that are finished inside and outside are produced in advance in a factory, and a plurality of them are transported to a construction site and assembled on site. , A house.

As described above, since this prefabricated house is finished in advance at the factory for each housing unit, it is necessary to quickly provide the waterproof band of the target portion of the outer wall of the housing unit.

With a structure that is waterproofed by applying cement mortar etc.,
It takes a long time until the cement mortar hardens and the waterproofing is completed, but the waterproof structure with a waterproof band such as a gasket is completed only by inserting the gasket, etc.
It is completed very quickly and is suitable for factory production.

(Problems to be solved by the invention) However, although the waterproof performance of the structure in which a waterproof band such as a gasket is provided in the joint portion between the outer walls is almost good, the horizontal joint portions of the outer walls vertically adjacent to each other are provided. The waterproof structure of the cross joint part, which is the intersection of the waterproof band provided on the right side and the waterproof band provided on the vertical joints of the outer walls adjacent to the left and right, has a difficult problem due to the crossing of the two.

That is, when a waterproof band such as a gasket is inserted into the horizontal joints and the vertical joints, it is necessary to overlap the two or to cut one of the gaskets at this intersection. in this way,
When stacked or cut, rainwater easily leaks from this interval, and a satisfactory waterproof effect cannot be expected.

Especially, in the case of prefabricated houses, since a waterproof band such as a gasket is provided for each housing unit in order to finish the housing unit at the factory, the gasket is cut at the boundary between the upper floor and the lower floor. A waterproof structure at the boundary between the floor and the lower floor is particularly important.

Therefore, an object of the present invention is to provide a waterproof structure having no defects in the cross joints where the vertical joints and the horizontal joints intersect.

(Means for Solving the Problems) The present invention is made to solve the above problems and achieve the above objects, and is a horizontal joint provided between laterally adjacent outer walls. A waterproof structure of a cross joint portion in which a waterproof belt and a vertical waterproof belt provided in a vertical joint portion between the outer walls adjacent to each other on the left and right intersect, wherein the horizontal waterproof belt of the horizontal joint portion has a cross joint portion. The vertical waterproof belt of the vertical joint is provided so as to pass therethrough, and the vertical waterproof belt is cut at a position intersecting with the horizontal waterproof belt, and the upper end of the cut vertical waterproof belt is filled with a water-resistant filling material. A rubber elastic plate is provided between the elastic filler and the horizontal waterproof belt.

In the present invention, the lateral joint has an outer wall at the top,
By making this outer wall a suitable eave shape, it can function as an eaves, and it is difficult for rainwater to enter the horizontal joint, so the horizontal waterproof belt of this horizontal joint is as watertight as the vertical waterproof belt. Even if you don't complete it, you can waterproof it with rainwater. Therefore, the material of the horizontal waterproof belt may be made of a material having good waterproof property such as natural rubber, synthetic rubber, soft vinyl chloride resin, etc. However, the open-cell urethane foam may be made of liquid butyl polymer or pitch. It may be impregnated with an aqueous liquid.

In the present invention, the vertical waterproof band of the vertical joint is important for waterproof performance, and what is usually called a gasket is inserted into the joint.

As the material of this gasket, when it is inserted into the joint portion, it is necessary to be in close contact with the side surface of the outer wall, so that it is preferable that it is flexible and elastic. As such a material, a conventionally used material such as a rubber such as a natural rubber or a synthetic rubber, a synthetic resin such as a soft vinyl chloride resin, or a combination thereof with a metal can be used as it is.

Among these, EPDM (ethylene-propylene-diene-
A synthetic rubber having good weather resistance such as a methylene copolymer) or butyl rubber is preferable.

The shape of such a gasket may be any shape as long as it is filled along the joints and the side surface of the outer wall and the gasket are watertight, but generally, the shape is a cylindrical gasket or an elongated cross-section anchored shape. Gaskets are often used.

Examples of the water-resistant filler used in the present invention include caulking materials, sealing materials, putties, and the like, and rubber elastic plate-shaped members include flexible and elastic butyl rubber and natural rubber plate-shaped members. To be

The waterproof filler is filled in the upper end of the cut vertical waterproof band.If the vertical waterproof band is a cylindrical gasket, it will be filled in the hollow part of this cylinder and rainwater will enter into it. In addition, since the rubber elastic plate-like body is provided on the waterproof filler, the rubber elastic plate-like body does not bend and dent into the hollow portion, so that the waterproof performance is further improved. Incidentally, if a heat-resistant fire-resistant zone is provided on the indoor side of the waterproof belt of the present invention, heat resistance is improved and at the same time, since this part becomes airtight, the flow of water droplets due to the air flow does not go to the indoor side, The waterproof performance is improved and the outer wall becomes extremely good.

(Operation) In the present invention, there is no water leakage because the horizontal joint has a horizontal waterproof band.

Further, if the lower end of the outer wall on the upper side of the lateral joint is formed into an eave shape, the waterproof performance can be improved.

In addition, there is no water leakage because the vertical joint has a vertical waterproof band.

At the cross joint, which is the intersection of the vertical joint and the horizontal joint, a horizontal waterproof strip is provided passing through the cross joint, and the vertical waterproof strip is cut at the intersection of the vertical joints. However, the upper end of the vertical waterproof belt is filled with water resistant filler,
Since the rubber elastic plate-like body is provided between the water resistant filler and the horizontal waterproof belt, even if the upper end of the vertical waterproof belt has irregularities, the concave portion is filled with the water resistant filler. The upper rubber elastic plate-like body is not bent and dented, so that the waterproof performance is improved and rainwater does not leak from here.

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

In addition, the horizontal joints are usually generated on the boundary surface between the upper floor and the lower floor, and at this boundary surface, the vertical joint portion of the present invention is cut at the intersection with the horizontal waterproof belt, It is not necessary to provide a long vertical prevention belt from the upper floor to the lower floor,
It is only necessary to provide a vertical prevention band separately for each, and construction is easy.

Particularly, in the case of an assembled house, a vertical waterproof band is provided on the outer wall of each housing unit at the factory because the housing unit is finished 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, at the factory, the housing unit having the vertical waterproof band on the outer wall of each housing unit is transported to the construction site, first, the housing unit on the lower floor is installed, and the water resistant filler is attached to the tip of the vertical waterproof band. , A rubber elastic plate-like body is provided on the water-resistant filler, and a horizontal waterproof belt is provided on the water-proof filler so as to pass through the vertical joints. By providing, the waterproof structure for the outer wall of the present invention is completed. As described above, the waterproof structure of the outer wall of the present invention is particularly suitable for an assembled house and has good workability.

(Example) Next, the Example of this invention is described, referring drawings.

The drawings show one embodiment in which the waterproof structure of the present invention is applied to a prefabricated house. FIG. 1 is a cross-sectional view of the cross joint of the house taken at a vertical joint, and FIG. 2 is a side view of the house. is there.

3 to 4 show a cross joint portion in a state where the waterproof structure of the present invention is applied. FIG. 3 is a perspective view showing an upper portion of a vertical joint of a housing unit on a lower floor, and FIG. 4 is a horizontal waterproof. It is a perspective view which shows the state which has attached the belt.

 In the figure, A indicates an assembled house.

Reference numeral 1 denotes an outer wall of the prefabricated house A. This outer wall 1 is made of ALC, and the largest outer wall 1 of the outer wall 1 has a size of 2655 mm × 309 mm and a thickness of 100 mm. At the lower end of the outer wall of the upper floor, as shown in FIG. 1, the outer surface of the outer wall hangs down slightly to serve as an eaves. Further, the upper end of the outer wall 1 on the lower floor is slightly shaved on the outer surface in conformity with the shape of the lower end of the outer wall on the upper floor. Thus, if the lower end of the outer wall 1 on the upper floor hangs down, it becomes difficult for rainwater to enter the horizontal joints.

Reference numeral 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 composed of a cylindrical EPDM gasket having a diameter of 10 mm.

The upper end of the waterproof belt 4 on the lower floor is, as shown in FIG. 1,
Even if the rainwater is bent toward the indoor side and drops along the waterproof belt 4 on the upper floor, it does not fall into the room.

Reference numeral 5 denotes a horizontal waterproof belt, which is a strip of an open-cell urethane foam impregnated with a liquid butyl polymer.

6 is a vertical refractory zone, which is made of rod-shaped ceramic fibers.

Reference numeral 7 is a horizontal refractory zone, which is made of rod-shaped ceramic fibers.

Reference numeral 8 denotes a rubber elastic plate-like member, which is made of a butyl rubber tape.

 Reference numeral 9 is a waterproof filler, which is made of non-drying putty.

 Next, a method of constructing this outer wall will be described.

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 zone 4 is inserted from the outdoor side into a vertical joint 2 which is a boundary between the outer wall 1 and the outer wall 1 of these housing units, and a ceramic fiber which is a vertical fire zone 6 is indoor side. And insert them into the housing unit.

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

The upper part of the vertical joint of the housing unit on the first floor 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 in the cylinder of the gasket 4 so as to rise up. Further, a butyl tape 8 which is a rubber elastic plate is laid on the non-drying putty 9.

Next, the second-floor housing unit is placed on the first-floor housing unit so that the first- and second-floor vertical joints are in a straight line to form a cross joint, and the outer wall of the present invention is formed. The waterproof structure of is completed.

In the case of a three-story prefabricated house, it is advisable to place the third-floor housing unit on the second-floor housing unit in the same manner.

 Next, the waterproof function of the outer wall 1 will be described.

When rainwater falls on the outer wall 1 on the second floor, along this outer wall 1,
It falls and reaches the horizontal joint 3 on the boundary between the first floor and the second floor.

Since the lower end of the outer wall 1 of the lateral joint 2 has an eaves shape, rainwater dropped from here reaches the outer wall 1 on the first floor directly, but rainwater may fall to the indoor side due to wind or the like.
Then, since there is the horizontal waterproof belt 5 on the indoor side of the horizontal joint 3, rainwater does not enter from here to the inside.

The rainwater that has fallen on the vertical joint 2 on the second floor falls along the waterproof belt 4 of the vertical joint 2 and reaches the cross joint on the boundary between the first floor and the second floor.

Since the upper end of the vertical waterproof belt 4 on the first floor at the cross joint bends toward the indoor side, rainwater that falls along the vertical waterproof belt 4 on the second floor falls directly from here onto the vertical waterproof belt 4 on the first floor. However, rainwater may fall indoors due to wind or the like. However, here, the horizontal waterproof belt 5 and the water-proof filler 9 and the rubber elastic plate 8 between the horizontal waterproof belt 5 and the upper end of the vertical waterproof belt 4 are provided, and a gap is provided between them. Since there is no rainwater, it does not enter the indoor side and falls on the vertical waterproof belt 4 on the first floor.

As described above, the waterproof structure of the outer wall of the present invention is a structure which can be installed very easily and has good waterproof performance.

(Effect of the invention) In the present invention, since the water resistant filler is filled at the upper end of the vertical prevention zone at the cross joint where the vertical joint and the horizontal joint intersect, the water resistant filler and the horizontal waterproof zone are used. The rubber elastic plate-like member provided between the two is not bent and dented, rainwater does not enter, and an outer wall having good water resistance is completed.

Further, the vertical waterproof belt is cut at the cross joints and the horizontal waterproof belt is provided on the vertical waterproof belt, which makes the waterproof belt easy to construct and convenient.

[Brief description of drawings]

The drawings show one embodiment in which the waterproof structure of the present invention is applied to a prefabricated house. FIG. 1 is a cross-sectional view of a cross joint of an outer wall of the house taken at a vertical joint, and FIG. 2 is a side view of the house. It is a figure. Figures 3 to 4 show the state of construction. 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 shows the state in which a horizontal waterproof band is attached. It is a perspective view. A: Housing 1 ... Outer wall 2 ... Vertical joint 3 ... Horizontal joint 4 ... Vertical waterproof belt 5 ... Horizontal waterproof belt 6 ... Vertical fire belt 7 ... Horizontal fire belt 8 ... Rubber elastic plate 9: Water resistant filler

Claims (1)

(57) [Claims] 1. A cross that crosses a horizontal waterproof strip provided on a horizontal joint between vertically adjacent outer walls and a vertical waterproof strip provided on a vertical joint between adjacent outer walls on the left and right. A waterproof structure of the joint portion, the horizontal waterproof belt of the horizontal joint portion is provided to pass through the cross joint portion, the vertical waterproof belt of the vertical joint portion is cut at a position intersecting the horizontal waterproof belt, A water-resistant filling material is filled in the upper end of the cut vertical waterproof belt, and a rubber elastic plate-like body is provided between the water-resistant filling material and the horizontal waterproof belt. Waterproof structure.