JPH1018455A - Opening-section structure of air-permeable layer in method of air-permeable layer construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the rottenness of wood and the deterioration in the performance of a heat-insulating material simply and surely without the large-scale construction of works so as not to generate the rottenness of wood and the deterioration of the performance of the heat-insulating material by the blowing-in of rain and snow into an air-permeable layer for obviating the internal condensation of a building frame. SOLUTION: A plug structure 10 consisting of a nonwoven fabric is arranged near the inside of the opening section of an air-permeable layer 5 so as to cover the opening section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open portion structure for preventing rain or snow from blowing into an open portion of a ventilation layer in a ventilation layer method.

[0002]

2. Description of the Related Art When a house is newly renovated, consideration given to the heat insulation of the house is remarkable especially in a snowy cold region. For example, the method of filling glass wool-based insulation between the frame members is a typical example of the insulation construction method.However, in cold regions, this method is more thorough, and various methods for forming a frame such as a roof or an outer wall surface are used. A sufficient thickness of the filler is secured in a suitable location.

[0003] In this method, since the outdoor and the indoor are separated by a heat insulating material, "condensation" easily occurs due to a temperature difference between the indoor and the outdoor. And in this dew,
There are two forms, "surface dew condensation" generated on the interior wall and the like, and "internal dew condensation" generated on the heat insulating material itself (that is, inside the wall) which is a partition wall. In particular, internal dew condensation is not only inconspicuous, but also a heat insulating material in which dew condensation has once occurred has extremely reduced heat insulating properties, and there are actually many situations in which it is hardly used.

[0004] Dew condensation of both forms has the same mechanism of occurrence, but differs in prevention measures. To prevent surface condensation, it is necessary to maintain the wall surface temperature at or above the dew point temperature. As a measure, for example, the heat insulating material is made stronger, or hot air is convected on the wall surface to increase the surface temperature.

On the other hand, measures to prevent internal condensation are to prevent the water vapor in the room from moving into the interior of the wall or to discharge the water vapor that has entered the interior of the wall to the outside. The former can be achieved by providing a moisture-proof layer, and the latter can be achieved by using a highly permeable exterior material or by providing a permeable layer. The ventilation layer is generally an air layer having a width of about 20 mm provided between the heat insulating material and the exterior material, and plays a role of discharging water vapor that has entered the wall from the room to the outside.

[0006]

However, as described above, since the ventilation layer necessarily has a portion communicating with the outside air, rain or snow may enter the ventilation layer. Naturally, the rain or snow that has entered may cause adverse effects such as decay of wood and deterioration of the performance of the heat insulating material, which may shorten the life of the house.

[0007]

In view of the above points, the present inventor has finally made the present invention as a result of intensive studies. The point is that a plug structure made of a nonwoven fabric is arranged so as to cover the opening.

[0008] The term "non-woven fabric" as used herein means "a fiber sheet (web) is processed mechanically, chemically and thermally without passing through the form of a yarn, and is bonded by an adhesive or a fusion force of the fiber itself. Fabric (Kojien 4th edition, Iwanami Shoten) ". An object of the present invention is to prevent rain and snow blown by strong wind from the opening of the ventilation tank from entering the inside. Therefore, it can be said that all nonwoven fabrics meet this purpose. However, considering that it is one of the constituent materials of the house, those having weather resistance, those which are nonflammable or flame retardant, and the like are more preferable.

The "plug structure" is a member formed of a non-woven fabric and installed at the opening of the ventilation layer, and the structure is not particularly limited as long as the structure covers the entire opening. As a preferred example, the sheet-like nonwoven fabric is first cut into a narrow width, and then these are curved in a waveform, and the contact portions are arranged such that the convex portions of the curved narrow ribbon come into contact with each other. A honeycomb-shaped plug structure obtained by sequentially bonding is preferable because it is lightweight and has high strength. Here, it should be noted that the honeycomb is not installed in such a manner that the ventilation layer and the outside communicate with each other. This is because the outside air only passes through the inside of the fiber structure of the nonwoven fabric.

[0010] Since the nonwoven fabric is used, this plug structure can have a certain air permeability regardless of the structure. However, the nonwoven fabric may be provided with a through hole particularly at a place where a large flow rate of ventilation is desired.
It should be noted that there was no problem at all as to whether or not the use of the nonwoven fabric would cause clogging and hindrance, within the range of trial production experiments by the present inventors.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the drawings.

FIG. 1 shows an example of an open portion structure 1 (hereinafter, referred to as “structure 1 of the present invention”) of a gas permeable layer in the gas permeable layer method according to the present invention.
It shows the lower end position of the house outer wall. The wall employs a ventilation layer method, and a heat insulating material 4 is provided between the exterior material 2 and the interior material 3.
Are not completely filled, and the exterior material 2 and the heat insulating material 4 are separated from each other, and the ventilation layer 5 is formed here. In this example, a windproof sheet 6 is provided outside the heat insulating material 4 and a moistureproof sheet 7 is provided between the heat insulating material 4 and the interior material 3 in order to effectively prevent dew condensation. A plug structure 10 made of a nonwoven fabric is provided at a lower end position of the ventilation layer 5. The presence of the plug structure 10 is a feature of the structure 1 of the present invention. Although not clear in the figure, the plug structure 1
Basically, 0 is arranged continuously along the wall so that there is no notch in the middle.

FIG. 2 shows an example of the plug structure 10. As is apparent from the figure, this is a honeycomb-shaped structure formed by bending the ribbon-shaped nonwoven fabric 11 into a waveform and bonding the protruding portions to each other. This is arranged in such a manner that each nonwoven fabric 11 covers the ventilation layer 5 (that is, a number of through holes in the honeycomb are closed by the exterior material 2 and the windproof sheet 6). Therefore, when the plug structure 10 of the present example is viewed from the opening of the ventilation layer 5, only the outermost nonwoven fabric 11 is visible. Therefore, if the adhesive force between the nonwoven fabrics 11 is adjusted and the sheets are peeled off one by one from the outside after the installation, if a situation occurs in which dust or dust adheres and causes clogging, resulting in reduced ventilation capacity. However, only the first nonwoven fabric (that is, the outermost nonwoven fabric) can be removed, and there is no problem.

Although not shown, the fiber density of the non-woven fabric 11 constituting the plug structure 10 may be increased in order to increase the ventilation force, or the fiber density of the non-woven fabric 11 may be changed. Instead, holes may be made in some places of the nonwoven fabric sheet.

The structure of the lower end of the outer wall has been described above as an example.
0 may be set. Figure 3 shows the ventilation layer 5 in a ridge with a triangular roof.
When the opening is provided, the plug structure 1 is provided in the opening.
This is an example in which 0 is arranged. The plug structure 10 of the phone example also has the same effect as that of the previous examples.

[0016]

As described above in detail, the open structure of the gas permeable layer in the gas permeable layer method according to the present invention has a plug structure made of a nonwoven fabric near the inside of the opening of the gas permeable layer so as to cover the opening. The invention is characterized by having a body disposed therein, and is an extremely advanced invention having various effects as described below.

Since the plug structure covered with the nonwoven fabric is disposed at the opening of the ventilation layer even in the case of rain accompanied by strong wind, rain does not enter the inside of the ventilation layer, and thus the frame is corroded. It becomes difficult to do. Since the plug structure is arranged at the opening of the ventilation layer,
The strength of the opening is improved, and the opening is hardly damaged. Nonwoven fabrics are lighter than other materials and do not corrode themselves. By covering with a nonwoven fabric, there is no open part, so that rats and other small animals do not enter the room through the ventilation layer.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing an example of an open portion structure of a ventilation layer in a ventilation layer method according to the present invention.

FIG. 2 is a schematic perspective view showing an example of a plug structure.

FIG. 3 is a schematic cross-sectional view showing another example of the open-portion structure of the ventilation layer in the ventilation layer method according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Opening structure of ventilation layer according to the present invention 2 Exterior material 3 Interior material 4 Abandonment material 5 Ventilation layer 6 Windproof sheet 7 Moistureproof sheet 10 Plug structure 11 Nonwoven fabric

Claims (1)

[Claims] 1. An open portion structure of a gas permeable layer in a gas permeable layer method, wherein a plug structure made of a nonwoven fabric is disposed near the inside of the opening of the gas permeable layer so as to cover the opening.