JP3065676B2 - Exterior wall structure of wooden house with ventilation layer - Google Patents

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 of a wooden house having a ventilation layer for improving the ventilation of the wooden house to prevent moisture.

[0002]

2. Description of the Related Art In a warm and humid climate such as Japan, it is a common sense to ventilate wooden houses in order to protect buildings from moisture. Vent layer construction methods are known.

In this case, a structure is adopted in which outside air is directly introduced from a gap between the outer wall finishing material and the inner wall at the draining portion of the base and flows into the ventilation layer.

In the above-described structure in which the outside air is directly introduced into the inside of the outside wall, when the outside air temperature is low, the temperature of the outside wall itself is lowered by low-temperature air to promote the occurrence of dew condensation inside the wall. Therefore, at present, the above-described ventilation layer construction method cannot completely suppress the occurrence of internal dew condensation in cold regions.

FIG. 3 is an explanatory view showing an example of an outer wall structure having such a gas permeable layer. The details will be described with reference to FIG. 3. The gas permeable layer is provided outside the heat insulating layer such as glass wool, and the external wall finishing material is provided. And is provided between them.

[0006] The water vapor contained in the indoor air is
It has a partial pressure (steam pressure) corresponding to the amount of water vapor at that time and room temperature, and shows a pressure considerably higher than the water vapor partial pressure of the outside air in winter. For this reason, the indoor water vapor diffuses and moves to the outside air through the gaps between the outer wall materials and the constituent materials due to the pressure difference, but at the stage where the water vapor has passed through the heat insulating layer, the water vapor temperature becomes substantially close to the outside air temperature. Therefore, at this point, dew condensation has already occurred, but this is introduced into the airflow layer, and released to the outside air through the upper eaves and the back of the cabin before the dew condensation is absorbed by the components. What is to be attempted is the mechanism in the ventilation layer construction method.

[0007]

In the above-described ventilation layer, since the low-temperature outside air in cold weather is directly introduced into the inside, not only the inside temperature of the ventilation layer becomes equal to the outside temperature but also the heat insulation layer. In a state where the water enters the inside to lower the temperature and lose the heat insulating property, the conditions are contradictory from the viewpoint of preventing dew condensation.

Therefore, there is a problem in that the outside air is directly introduced into the ventilation layer inside the outer wall as described above. For this reason, the present invention has a ventilation layer for preventing moisture from being introduced directly into the ventilation layer inside the outer wall. The purpose is to provide a wooden house outer wall structure.

[0009]

In order to achieve the above-mentioned object, the present invention provides a ventilation layer having an interval between an upright wall and an outer wall, and introducing air into the ventilation layer to form dew. In a wooden house outer wall structure having a ventilation layer for preventing
A base provided along the upper surface of the cloth base, and provided between the base and the cloth base, provided with a ventilation hole, and provided with an insertion groove provided in parallel along the upper surface of the cloth base, to provide air under the floor. A packing material serving as a ventilation means, an outer wall finishing material provided outside a wall standing upright on the base with a ventilation layer therebetween, a vertical portion along the inner lower edge of the outer wall finishing material, and the vertical portion A drain layer extending outward from the lower end along the lower surface of the outer wall finishing material, further extending in the direction of the packing material, and a flange at the tip thereof inserted into an insertion groove provided in the packing material. The present invention provides a wooden house outer wall structure having:

[0010]

Next, the present invention will be described in detail with reference to examples.

FIG. 1 is a sectional view showing one embodiment of an outer wall and a base portion in a wooden house outer wall structure having a ventilation layer according to the present invention.

In FIG. 1, reference numeral 1 denotes a cloth foundation, which is provided with a ventilation port 11 at a predetermined position, for example, a shutter 12 which is open in summer and closed in winter to control air introduced under the floor. The outer surface of the cloth foundation 1 is covered with a heat insulating material 13.

Reference numeral 2 denotes a packing material having air permeability and serving as a means for ventilating underfloor air. As shown in FIGS. Is formed with an insertion groove 22 and interposed between the cloth foundation 1 and the base 3, and is formed of, for example, a synthetic resin material.

Reference numeral 4 denotes a drainer, which is, for example, an extruded product of aluminum, the cross section of which is formed as shown in FIG. 2 (A), and a flange 41 is inserted into the insertion groove 22 of the packing material 2 and is vertically inserted. The portion 42 is disposed on the back side of an outer wall finishing material, which will be described later, and is used as a drain, so that invasion of air from outside is prevented.

Reference numeral 5 denotes a floor joist, which has a heat insulating material inside to provide heat insulation between the floor and the floor, and reference numeral 6 denotes a heat insulating layer made of a heat insulating material. A waterproof layer 62 is provided on the outside of the heat insulating layer 6 and a moisture-proof layer 63 is provided on the indoor side to protect the room from moisture.

Reference numeral 7 denotes an outer wall finishing material,
A vertical layer is attached to the heat-insulating layer 6 having a layer, and is made of a wall finishing material to protect the house from wind and rain. A ventilation layer 8 communicating vertically is formed between the outer wall finishing material 7 and the waterproof layer 62. Have been. The vertical portion 42 of the above-described drainer 4 is sandwiched below the outer wall finishing material 7, and the lower end of the outer wall finishing material 7 and the drainer 4 are coked 71 to prevent rainwater from entering as shown in the figure. Have been. In addition, the installation of the drainer 4 allows the air under the floor to pass through the ventilation holes 21 of the packing material 2.
Through the drainage 4, and further from the lower part of the ventilation layer 8 to the upper part.

In this embodiment thus constructed, the air under the floor having a temperature relatively higher than the temperature of the outside air is introduced into the ventilation layer 8 of the outer wall finishing material 7 by the packing material 2 and the drainer 4 having air permeability. Then, it flows out from above the ventilation layer 8 toward the back of the eaves or the back of the hut.

Therefore, even under conditions where dew condensation occurs due to direct introduction of outside air in the above-described ventilation layer construction method, dew condensation in the outer wall can be prevented.

Although the present invention has been described in detail, various modifications may be made without departing from the spirit of the present invention, for example, the use of other materials for the packing material, drainage, and outer wall finishing material. And these variations are not excluded from the scope of the present invention.

[0021]

According to the present invention, as described in the above embodiment, the drainer disposed at the lower portion of the outer wall does not introduce the outside air directly into the ventilation layer in the outer wall, but through the air-permeable packing material. Since only the air under the floor is introduced into the ventilation layer,
Since air having a higher temperature than the outside air passes through the ventilation layer, the effect of preventing dew condensation in the outer wall caused by a temperature difference can be obtained, and the surface temperature of the outer wall finishing material on the indoor side can be increased.

Further, according to the present invention, the above-described ventilation layer can be dried by the ventilation of the outside air by opening the ventilation opening provided in the cloth foundation in summer, and furthermore, the high temperature can be discharged by the solar radiation heat.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of an outer wall and a base in a wooden house outer wall structure having a ventilation layer according to the present invention.

FIG. 2 is an explanatory diagram of a drainer (FIG. 2A) and a packing material (FIGS. 2B and 2C) in the present embodiment.

FIG. 3 is an explanatory view showing an example of a conventional outer wall structure having a ventilation layer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cloth foundation 2 ... Packing material 3 ... Base 4 ... Drainage 6 ... Heat insulation layer 7 ... Exterior wall finishing material 8 ... Ventilation layer

Claims (1)

(57) [Claims] An outer wall structure of a wooden house having a ventilation layer provided between a standing wall surface and an outer wall with a space between the walls and a ventilation layer for introducing air into the ventilation layer to prevent dew condensation. A base (3) extending along the upper surface of the base (3), provided between the base (3) and the cloth foundation (1), provided with a ventilation hole (21), and parallel along the upper surface of the cloth foundation (1). A packing material (2) provided with an insertion groove (22) provided on the base and serving as a ventilation means for air under the floor; and a ventilation layer (8) on the outer side of a wall standing upright on the base (3).
Outer wall finishing material (7) provided at a distance from the outer wall finishing material (7), a vertical portion (42) along the inner lower edge of the outer wall finishing material (7), and a lower surface of the outer wall finishing material (7) from the lower end of the vertical portion (42) (4) extending outward in the direction of the packing material (2) and having a flange (41) at the tip thereof inserted into an insertion groove (22) provided in the packing material (2). An outer wall structure of a wooden house having a ventilation layer, comprising: