JPH10121592A - Opening part structure of ventilating layer in ventilating layer method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To normally perform ventilation even at the time of strong and gentle winds by disposing a shield plate which can change an opening and closing angle in response to wind pressure from an plug structure and an opening part communicating with the inside of the opening part of a ventilating layer before and behind and setting the opening and closing angle between the shield plate and the end face of the opening part side of the plug structure at the maximum in a windless state. SOLUTION: In the case where the opening part structure of the venting layer is applied to the ridge part of a roof truss roof, it is communicated with an attic space 2 through a ventilating opening 3 upward of a ridge beam of the ceiling part of the attic space 2. It is disposed at the front position of two before-and-behind-communicated plug structures 4, a cover member 5 and the respective plug structures 4, and formed by a shield plate 6 of a size just enough for covering a part of the side end face of a ventilating layer opening part of the plug structure 4. The shield plate 6 is rotated in response to wind pressure of the air entering from the opening part, the opening and closing angle is varied, and in a windless state the inflow air can be sufficiently guided by setting the opening and closing angle between the shield plate 6 and the side end face of the opening part of the plug structure 4 at the maximum. Even at the time of a strong wind, a large amount of the air is not allowed to flow in.

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 automatically adjusting the amount of air entering an open portion of a gas permeable layer in a gas permeable layer construction method without a driving source.

[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, a method of filling a glass wool-based heat insulating material between the frame members is a typical example of the heat insulating construction method. Thick filler material is ensured.

[0003] In this method, since the outside and the inside are separated by a heat insulating material, "condensation" easily occurs due to a temperature difference between the inside and outside. 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, it is difficult to maintain the heat insulating property of a heat insulating material in which internal dew condensation has occurred, and there are actually many situations in which the heat insulating material 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.

The prevention of the internal dew condensation is to prevent the water vapor in the room from moving into the inside of the wall or to discharge the water vapor that has entered the inside 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 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. In order to prevent rain and small animals from entering the gap, a member for closing the opening is usually fitted in the opening of the ventilation layer. Of course, this member does not completely block the flow of air, but communicates before and after that, and allows the outside air to communicate with the ventilation layer. Generally, it is a plate-like body having many through holes.

[0006]

However, since the ventilation layer communicates with the outside air as described above, the amount of air entering through a member (hereinafter referred to as a "plug structure") closing the opening of the ventilation layer is determined by the wind pressure. Will be greatly affected by In terms of the properties required of the ventilation layer itself, that is, exhausting high-humidity air to the outside, there was no wind (in this case, the air flow was caused only by the temperature difference) or a slight wind pressure was applied. It is preferable to make the opening large so that air can enter even sometimes. Because the ventilation capacity of the building in the ventilation layer method is the formation of the negative pressure area,
This is because, of course, it is affected by factors such as the temperature difference, but it is most affected by the pressure of the airflow flowing into the ventilation layer opening.
However, if the opening is made large in order to increase the flow rate of the inflowing air, in the case of a strong wind such as a typhoon, rain-mixed air will also pass through the plug member and easily enter the inside of the ventilation layer from the opening.

[0007]

In view of the above points, the present inventor has finally made the present invention as a result of intensive research, and the feature of the present invention is that the present invention relates to the arrangement before and after being disposed inside the opening of the ventilation layer. And a shielding plate large enough to cover at least a part of the opening-side end face of the plug structure, wherein the shielding plate has air entering through the opening. The opening and closing angle changes according to the wind pressure, and the opening and closing angle between the shielding plate and the end face on the opening side of the plug structure is set to be maximum in a no wind condition.

[0008] Here, the "plug structure" is a member installed in the opening of the ventilation layer as described above, and is connected in front and rear so that air flows. However, the details of the structure are not particularly limited as long as the entire opening is covered.

The “shielding plate” is a plate-like body disposed at the front position of the plug structure (on the side of the ventilation layer opening).
This is a member for keeping the amount of air flowing into the plug structure as constant as possible irrespective of the magnitude of wind pressure. That is, when the wind pressure is low, the plug structure is substantially wide open, and when the wind pressure is high, the plug structure is small. Further, the shielding plate itself has no or almost no air permeability.

The specific shape or material of the shielding plate is not particularly limited, but does not require electric power or the like, and is opened and closed by the wind pressure itself. For example,
If the shielding plate is made of a plastic plate, one end of which is fixed to the roof side and the other end is free, the shielding plate will be rotated about the fixed part by deformation due to the material. Become. Or, regardless of the deformation of the material, keep the shield plate in the normally open position by spring elasticity, and when the shield plate receives wind pressure, bring it closer to the closed position against the urging force of the spring. A good mechanism may be used. In any case, the opening / closing of the shielding plate is such that the degree of opening changes finely (preferably steplessly) according to the magnitude of the wind pressure.

[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 a structure 1 of a ventilation layer open part according to the present invention.
FIG. 1 schematically shows a state where the present invention is applied to a ridge portion of a hut roof as an example (hereinafter, referred to as present invention structure 1). As is clear from the figure, the structure 1 of the present invention communicates with the back of the hut 2 through the ventilation hole 3 provided above the purlin at the ceiling of the hut back 2. The structure 1 of the present invention is formed by two plug structures 4 and a cover member 5, and a shielding plate 6 arranged at a front position of each plug structure 4.

FIG. 2 shows the structure of the plug structure 4 shown in FIG. 1. The plug structure of this embodiment is a plate-like body provided with a large number of through holes 41 as shown in the figure. However, the present invention structure 1
Is not limited to such a shape.

FIGS. 3 (a) and 3 (b) show two examples of the state of the shielding plate 6 which changes depending on the amount of air blown into the structure 1 of the present invention. FIG. FIG. 2B shows a state of the structure 1 of the present invention in a strong wind. As is clear from the figure, the shielding plate 6
Under no wind or light wind conditions, there is no or almost no deformation, and it is separated from the front surface of the plug structure 4, and the inflowing wind is sufficiently guided into the plug structure 4. In a strong wind, the shielding plate 6 is deformed by the wind pressure and approaches the plug structure 4 side. Then, only a small amount is guided into the plug structure 4 despite the strong wind. In the case of a strong wind accompanied by rain, the shielding plate 6 also prevents rainwater from entering the plug structure 4.

In this embodiment, the shielding plate 6 is formed of a flexible plastic, and is deformed by wind pressure due to the deformation of the ridge 61. This is a preferable method for manufacturing the structure 1 of the present invention at low cost. However, if the flexibility is lost or becomes extremely large due to a temperature difference or a secular change, the set air volume increases in the plug structure 4. There is a possibility that it will not be led to. Therefore, as shown in the schematic diagram of FIG.
The above-mentioned drawbacks can be solved by installing 2 and providing a spring 63 on it. The shape and structure of the spring 63 may be other than those shown in the drawings.

Next, FIG. 5 schematically shows a state where another example of the structure 1 of the present invention is applied to a lower portion of a wall. In this example, the opening faces vertically downward, but the structure of the shielding plate 6 and the like are the same as those in the previous figures.

[0016]

As described above in detail, the open structure of the gas permeable layer in the gas permeable layer construction method according to the present invention is characterized in that the front and rear communicating plug structures are arranged inside the opening of the gas permeable layer, and
A shielding plate having a size enough to cover at least a part of the opening-side end surface of the plug structure, and the shielding plate is rotated and opened and closed according to the wind pressure of air entering from the opening. The angle is changed, and the opening and closing angle between the shielding plate and the plug structure opening side end surface is set to be maximum in a windless state, which will be described below. This is a very advanced invention having various effects as described above.

When a gust or strong wind blows, the shielding plate provided at the opening of the ventilation layer shields the opening of the plug structure in accordance with the wind pressure, so that a large amount of air does not flow indoors. In such a case, normal ventilation (humid air discharge) can be performed. Although a shield plate is provided at the opening of the ventilation layer, the shield plate does not block the plug structure when there is no wind or light wind, so that even in such a case, minimum ventilation is possible. Even in the case of rain accompanied by strong wind, the opening of the plug structure is covered with the shielding plate, so that rain does not enter the inside of the ventilation layer, so that the frame is less likely to corrode. 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. Opening and closing of the shielding plate does not require electric power or the like only by wind pressure, so that running cost is unnecessary.

[Brief description of the drawings]

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

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

FIGS. 3A and 3B are schematic cross-sectional views showing the operation of the shielding plate.

FIG. 4 is a schematic sectional view showing another example of the present invention.

FIG. 5 is a schematic cross-sectional view showing another example of a mounting portion according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Opening structure of ventilation layer according to the present invention 2 Back of hut 3 Vent hole 4 Plug structure 5 Cover member 6 Shielding plate 61 Edge line 62 Rotating shaft 63 Spring

Claims (1)

[Claims] 1. A front and rear communicating plug structure disposed inside an opening of a gas permeable layer, and a shield plate large enough to cover at least a part of an end surface of the plug structure on a side of the gas permeable layer opening. ,
The shielding plate rotates according to the wind pressure of air entering from the opening, and the opening and closing angle changes,
An opening portion structure of a ventilation layer in a ventilation layer method, wherein an opening / closing angle between the shielding plate and the end surface on the opening side of the plug structure is set to be maximum in a windless state.