JPH06322853A - Heat insulating structure for wooden house - Google Patents

Abstract

PURPOSE:To provide a heat insulating construction excellent in each point of permeability, heat insulating property, airtightness, workability, economic property and living property in a heat insulating construction for wooden house. CONSTITUTION:A plate heat insulator 1 of foamed plastic is provided on the interior side of an outer wall framework, and a space 4 with an outer finishing material 3 to be mounted on the outside of the outer wall framework is opened to the outside air. While the inside and outside are closely partitioned by the plate heat insulator 1, permeability is kept by the space 4 opened to the outside air. Airtightness can be provided without the construction of a waterproofing sheet easily flapped by wind and broken, and a comfortable space with good cooling and heating efficiency can be provided within a short time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating structure for a wooden house.

[0002]

2. Description of the Related Art Traditional Japanese wooden houses have a structure that reflects the hot and humid Japanese climate in summer and ensures ventilation in each structural part and room to prevent wood from corroding.

On the other hand, in recent years, wooden houses are provided with a heat insulating material and a device for improving airtightness in order to improve habitability in winter and save heating energy. Also,
Even in temperate regions, it is recommended to use heat insulating materials to improve habitability in summer and save cooling energy.

Conventionally, the heat insulation structure of a wooden house is roughly classified into a heat insulation method for the outer wall and a heat insulation method for the outer wall.

The filling method is a method of inserting a fibrous heat insulating material of inorganic fiber such as glass wool or rock wool mainly between the outer wall frame members, and is the most widely used method in Japan at present.

The external tension method is a method in which a plate-like heat insulating material mainly made of foamed plastic is stretched on the outdoor side of the outer wall shaft assembly, and an external finishing material is further provided on the outdoor side thereof. It is said that the durability of the building is excellent in that respect as it does not cause condensation on the outer wall.

[0007]

However, the heat insulating structure formed by the above-mentioned filling method has the following problems: breathability, heat insulation, airtightness,
There are the following problems in terms of workability, economy, and habitability. In addition, since the heat insulating structure by the outer-lining method can uniformly stretch the plate-shaped heat insulating material over the entire surface, it is superior to the filling method in terms of heat insulation, but there are still the following problems in other points. .

(1) Filling method Breathability Normally, the outer wall portion formed by the filling method has a structure in which a fibrous heat insulating material is filled between outer wall shaft assembly members and sandwiched between an inner finishing material and an outer finishing material. No breathability of Therefore, warm indoor air with a large amount of water vapor enters and stays in the outer wall, which cools in the outer wall and causes dew condensation, which deteriorates the performance of the fibrous heat insulating material and accelerates corrosion of the outer wall frame. Becomes

Therefore, a windproof sheet for preventing the deterioration of the heat insulating property due to ventilation is provided on the outdoor side of the fibrous heat insulating material inserted between the outer wall shaft assembly members, and the fibrous heat insulating material and the outside It is partly performed to ventilate the inside of the outer wall by using a space communicating with the finishing material as a ventilation layer.
However, since the outer wall frame and the fibrous heat insulating material-filled portion are blocked by the windbreak sheet and do not come into direct contact with the outside air, the ventilation tends to be insufficient.

Since the fibrous heat insulating material in the filling method is inserted between the outer wall shaft assembly members, it is divided by the outer wall shaft assembly member, and a gap is apt to be generated between the fibrous heat insulating material and the outer wall shaft assembly member. It causes a decrease in heat insulation. In addition, since the fibrous heat insulating material does not have self-supporting property, the fibrous heat insulating material slides down inside the outer wall, which causes a decrease in heat insulating property.

Airtightness It has been practiced to provide a moistureproof sheet such as a polyethylene sheet on the inside (outside of the room) of the interior finishing material to provide airtightness. I can't hope. For this reason, as described in the section of "Breathability", even if a measure for improving the breathability by the breathable layer is taken, a harmful effect due to infiltration of moisture from the indoor side is likely to occur.

Workability In order to improve the airtightness even a little, it is necessary to install a moisture-proof sheet, and in order to provide a ventilation layer for reducing the adverse effect due to the airtightness which tends to be insufficient even with this moisture-proof sheet, windproof sheets are required. The construction of the sheet is indispensable, and it takes time and cost for these constructions. It is also possible to use a foamed plastic plate-shaped heat insulating material instead of the fibrous heat insulating material, but compared to the fibrous heat insulating material, the insertion between the outer wall shaft assembly materials is extremely poor in workability, so it has excellent air permeability. It is difficult to obtain heat insulation.

Since the heat insulating material is located in the middle portion of the outer wall portion, when the room is heated or cooled, a part of the outer wall frame is also cooled or warmed at the same time, resulting in waste of cooling and heating energy.

Comfortability As described above, when the room is heated or cooled, part of the outer wall framework is also cooled or warmed at the same time. Therefore, not only the rising and cooling of the air conditioner is slow but also the comfort that people feel is that of the surrounding walls and ceiling. Since it is greatly affected by the surface temperature, it takes time to obtain a comfortable space. By the way, it is said that the temperature perceived by humans (sensible temperature) is obtained by adding room temperature and the surface temperature of surrounding walls and ceiling and dividing by two.

(2) External Covering Method The breathable outer wall frame is sandwiched between the plate-like heat insulating material on the outdoor side and the internal finishing material and is not exposed to the outside air. Therefore, when dried indoors or indoor moisture from a water heater or a humidifier is absorbed by the outer wall shaft assembly, it becomes difficult to dry.

Airtightness Since the plate-shaped heat insulating material made of foamed plastic generally has high moisture resistance and low hygroscopicity, it is considered that a moisture-proof sheet may not be provided. However, since it is feared that moisture in the room may leak from the joint between the plate-shaped heat insulating materials and reach the outside of the plate-shaped heat insulating material, it is recommended to provide the moisture-proof sheet on the indoor side of the plate-shaped heat insulating material.

By the way, in order to obtain airtightness, it is the simplest to attach the moisture-proof tape from the indoor side only to the joint portion between the plate-shaped heat insulating materials. However, since there is an outer wall skeleton on the indoor side of the plate-shaped heat insulating material and the joint cannot be completely covered with the moisture proof tape, it is recommended to provide a moisture proof sheet on the entire outer surface of the skeleton. As described above, it is a cause of deterioration in workability.

Workability When the above-mentioned moisture-proof sheet is provided, the moisture-proof sheet is first constructed in a framed state where no wall is formed, that is, in the state where there is no stable base, and then the plate-like heat insulating material and the external finishing material are attached from above. In order. Construction of a moisture-proof sheet in an unstable state itself has poor workability, and particularly in construction on a windy day, since the moisture-proof sheet is covered, the workability becomes significantly poor. In order to prevent this, it is conceivable that the moisture-proof sheet is applied after the base plate is stretched, but the number of steps is increased by one and an extra material is required.

Economical Since the plate-shaped heat insulating material is located on the outer surface side of the outer wall portion, when the room is heated or cooled, the entire outer wall framework is cooled or warmed at the same time, which results in a large waste of cooling and heating energy.

Comfortability As described above, since the entire outer wall framework is cooled or warmed at the same time when the room is heated or cooled, it takes a long time to obtain a space where the above-mentioned person feels comfortable, as well as the rising of the cooling and heating is slow. .

The present invention has been made in view of the above conventional problems, and provides a heat insulating structure for a wooden house which is excellent in terms of breathability, heat insulation, airtightness, workability, economy and habitability. The purpose is to

[0022]

To this end, in the present invention,
As shown in FIG. 1, in a wooden house, a plate-shaped heat insulating material 1 made of foamed plastic is stretched on the indoor side of the outer wall framework, and an inner finishing material 2 is further provided on the indoor side thereof, while the outer wall framework room An external finishing material 3 is provided on the outer side, and has a heat insulating structure of a wooden house having an outer wall having a space 4 communicating between the plate-shaped heat insulating material 1 and the external finishing material 3 to the outside air.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the heat insulating structure of the outer wall portion will be described with reference to FIGS.

A plate-shaped heat insulating material 1 made of foamed plastic is stretched on the indoor side of the outer wall shaft assembly composed of the pillars 5 and the studs 6 and the like.

As the plate-shaped heat insulating material 1, foamed plastic having a large moisture resistance is generally used, such as extruded polystyrene foam, polystyrene foam, polyethylene foam, and rigid urethane foam. Among them, those made of extruded expanded polystyrene are preferable because they have excellent heat insulating performance and high moisture permeability resistance.

The plate-shaped heat insulating material 1 according to the present invention has a moisture insulating function as well as a heat insulating function, and the seam 7 between the plate-shaped heat insulating materials 1 is located at the position of the column 5 as clearly shown in FIGS. 1 and 2. Alternatively, it is preferable to set the studs 6 at positions so that air containing moisture from the room side does not easily flow into the outer wall portion through the joints 7.

In order to further prevent the invasion of moisture from the joint 7, it is preferable that the joint of the joint 7 is covered with a moisture-proof tape 8 from the indoor side, as clearly shown in FIG. Particularly in the present invention, since the plate-shaped heat insulating material 1 is stretched on the indoor side of the outer wall shaft assembly, the indoor side of the stretched plate-shaped heat insulating material 1 is completely exposed. Therefore, it is possible to easily attach the moisture-proof tape 8.

As the moisture-proof tape 8, for example, an adhesive tape made of plastic or waterproof paper is suitable.

On the indoor side of the plate-shaped heat insulating material 1, an internal finishing material 2 is provided.
Is provided. The internal finishing material 2 constitutes a wall surface on the indoor side and includes not only an interior material constituting the surface on the indoor side but also a base material for the interior material.

An external finishing material 3 is provided on the outdoor side of the outer wall shaft assembly. The external finishing material 3 constitutes a wall surface on the outdoor side and, like the internal finishing material 2, includes not only the exterior material constituting the surface on the outdoor side but also the base material thereof.

As shown in FIGS. 1 and 2, the external finishing material 3 is preferably attached via the ventilation furring strip 9 attached to the outside of the pillar 5 or the stud 6. This ventilation furring 9
When the external finishing material 3 is attached via the, the external finishing material 3 will be attached so as to be slightly floated from the outer wall frame.
As shown in FIG. 2 and FIG. 3, the outer wall ventilation port 10 is formed at the lower end portion of the outer finish material 3, and the space 4 between the plate-shaped heat insulating material 1 and the outer finish material 3 is opened to the outside air so that the air permeability is improved. Granted.

Since the plate-shaped heat insulating material 1 used in the present invention is made of foamed plastic having no ventilation like the fibrous heat insulating material, as in the case of forming the ventilation layer by the filling method,
There is no need to provide a windbreak sheet (not shown).

As described above, when the outer wall ventilation port 10 is provided at the lower end portion of the outer finish material 3, it is preferable that the outside air flowing in from the outer wall ventilation port 10 can escape upward. When the attic 14 is present, ventilation means for the attic 14 may be provided and the upper end of the space 4 between the plate-shaped heat insulating material 1 and the external finishing material 3 may be communicated with the attic 14, as shown in FIG. As described above, another outer wall ventilation port 10 may be provided at the upper end portion of the outer finish material 3.

The heat insulating structure of the ceiling will be described with reference to FIGS. 3 and 4.

The ceiling portion is a field fence 1 supported by a field bridge 11.
The plate-shaped heat insulating material 1 is stretched on the lower surface side of the second material 2, and the ceiling finishing material 13 is further provided on the lower side thereof.

The plate-shaped heat insulating material 1 is made of foamed plastic, like the material used for the outer wall described with reference to FIGS. In addition, the ceiling finishing material 13 constitutes a ceiling,
Not only the material constituting the ceiling surface but also the base material thereof is included.

The seam 7 of the plate-shaped heat insulating material 1 is preferably positioned along the field edge 12 so that moisture from the room does not easily enter the attic 14. Further, in order to prevent the invasion of moisture more reliably, it is preferable to cover the joint 7 by applying a moisture-proof tape 8 to the joint of the joint 7 from the indoor side. The attachment of the moisture-proof tape 8 can be easily performed by performing it from the indoor side.

In the case of an attic or the like having no ceiling, FIG.
Further, as shown in FIG. 6, it is possible to adopt a heat insulating structure of a roof portion in which a plate-like heat insulating material 1 made of foamed plastic is stretched on the lower surface side of the rafter 19, and a ceiling finishing material 13 is further provided on the lower side thereof. .

The seam 7 of the on-board heat insulating material 1 is preferably positioned along the rafter 19 in order to improve the airtightness. In order to further complete the airtightness, the joint of the seam 7 is connected from the inside of the room. It is preferable to attach a moisture-proof tape 8 to cover the seam 7. Also in this case, the attachment of the moisture-proof tape can be easily performed from the indoor side.

The heat insulating structure of the floor will be described with reference to FIGS. 3 and 7.

A plate-like heat insulating material 1 made of foamed plastic is provided between the base 15 and the large pull 16 in contact with the lower surface of the joist 17. Further, the floor material 18 is provided on the upper surface side of the joist 17 as in a normal wooden house.

The floor material 18 includes not only the material constituting the floor surface but also the base material thereof.

FIG. 8 schematically shows a wooden house having the above-described heat insulating structure for the outer wall, the ceiling and the floor.

As is clear from FIG. 8, the interior is the outer wall,
It is surrounded by each plate-shaped heat insulating material 1 arranged on the ceiling and the floor, whereby a high heat insulating effect is obtained.

Further, an outer wall ventilation port 10 is provided at the lower end of the external finishing material 3, and the space 4 between the plate-shaped heat insulating material 1 and the external finishing material 3 is communicated with the attic 14, while the eaves ventilation port 20 and the ridge are connected. When the ventilation port 21 is provided, ventilation can be achieved from inside the outer wall by using the attic 14 as a series of outside air passages. Then, together with the underfloor ventilation port 22 that is normally provided, the entire outer circumference of the house can be kept under good ventilation.

[0046]

The present invention is as described above and has the following effects.

(1) Breathability Since the plate-shaped heat insulating material 1 is located on the indoor side, the frame assembly located on the outer side can be sufficiently exposed to the outside air without lowering the heat insulating property. Therefore, it is easy to maintain the dry state of the frame member, the occurrence of dew condensation is extremely small, and even if dew condensation occurs, it is dried immediately, so that the durability of the house is improved.

(2) Heat insulating property Since the plate-shaped heat insulating materials 1 can be closely arranged by butting against each other, a high heat insulating property can be obtained without causing a heat insulating defect portion.

(3) Airtightness Not only the plate-shaped heat insulating material 1 itself located on the indoor side has a high moisture permeation resistance, but also the joint 7 between the plate-shaped heat insulating materials 1 can be easily closed with a moisture-proof tape. It is easy to prevent the ingress of generated moisture.

(4) Workability Since it is not necessary to perform a sheet-like material such as a moisture-proof sheet that is easily hit by wind and easily torn, it does not hinder the work even on a windy day.

(5) Economical Since the frame member is partitioned from the room by the heat insulating material 1, it is not necessary to cool or warm the frame member during cooling and heating, and energy loss during cooling and heating is small.

(6) Comfortability As described above, the energy loss during heating and cooling is small, the heating and cooling can be started up quickly, and the surrounding wall surfaces and ceiling surfaces can be brought close to the room temperature in a short time. It can be obtained in a short time.

[Brief description of drawings]

FIG. 1 is a perspective view showing a heat insulating structure of an outer wall.

FIG. 2 is a cross-sectional view showing a heat insulating structure of an outer wall.

FIG. 3 is a vertical cross-sectional view of a wooden house having a heat insulating structure on its outer wall, ceiling and floor.

FIG. 4 is a perspective view showing a heat insulating structure of a ceiling.

FIG. 5 is a vertical sectional view showing a heat insulating structure of a roof.

FIG. 6 is a perspective view showing a heat insulating structure of a roof.

FIG. 7 is a perspective view showing a heat insulating structure of a floor.

FIG. 8 is a schematic view of a wooden house having heat insulating structures for outer walls, ceilings, and floors.

[Explanation of symbols]

 1 Plate Insulation Material 2 Internal Finishing Material 3 External Finishing Material 4 Space 5 Pillars 6 Pillars 7 Seams 8 Moisture-Proof Tape 9 Vent Furnace Edge 10 Outer Wall Ventilation Vent 11 Norimate 12 Ceiling Finishing Material 14 Koya Back 15 Base 16 Large Draw 17 joist 18 Floor material 19 Rafter 20 House ventilation port 21 Building ventilation port 22 Underfloor ventilation port

Claims (6)

[Claims] 1. In a wooden house, a plate-shaped heat insulating material made of foamed plastic is stretched on the indoor side of the outer wall framework, and an internal finishing material is further provided on the indoor side thereof, while on the outdoor side of the outer wall framework. Is a heat insulating structure for a wooden house, which is provided with an external finishing material, and has an outer wall having a space communicating with the outside air between the plate-shaped thermal insulating material and the external finishing material. 2. The heat insulating structure for a wooden house according to claim 1, wherein the external finishing material is attached so as to be slightly floated from the outer wall frame. 3. A wooden house according to claim 1 or 2, characterized in that a plate-shaped heat insulating material made of foamed plastic is stretched under the field edge, and further has a ceiling provided with a ceiling finishing material on the indoor side thereof. Thermal insulation structure. 4. A heat insulation system for a wooden house according to claim 1 or 2, characterized in that a plate-like heat insulating material made of foamed plastic is stretched under the rafters, and further has a roof provided with a ceiling finishing material inside the room. Construction. 5. The moisture-proof tape is attached to the joint of the plate-shaped heat insulating material from the inside of the room.
Insulation structure of one of the wooden houses. 6. The heat insulating structure for a wooden house according to claim 1, further comprising a floor on which a plate-shaped heat insulating material made of foamed plastic is stretched under the joists.