JP4958522B2 - Wall insulation structure - Google Patents

Description

  The present invention relates to a wall heat insulating structure provided on a wall surface of a wooden house.

  Conventionally, a highly airtight and highly heat-insulated wooden house is provided, and the wall structure of such a house is provided with a moisture-proof sheet 3 on the outside of the inner wall 2 as in the house 1 shown in FIG. A heat insulating material 4 is provided. An air passage 5 is formed outside the heat insulating material 4, and an outer wall 6 is provided outside the air passage 5.

  As the heat insulating material 4 of the wooden house 1, for example, there is an inexpensive fiber heat insulating material, and there is a building wall structure shown in Patent Document 1 as a method of attaching the fiber heat insulating material. The wall structure includes an inner wall-side moisture-proof layer arranged outside the inner wall, a heat insulating material layer arranged outside the inner wall moisture-proof layer, and an outer wall-side moisture-proof waterproof wind-proof layer arranged outside the heat insulating material layer. A ventilation layer formed on the outer side of the outer wall side moisture proof waterproof windproof layer and an outer wall disposed on the outer side of the ventilation layer are provided. And the heat insulating material layer, the inner wall side moisture proof layer and the outer wall side moisture proof waterproof windproof layer cover the periphery of the fiber mat which is the heat insulating material layer with the moisture barrier film which is the inner wall side moisture proof layer and the outer wall side moisture proof waterproof windproof layer. Thus, it is provided in advance on an integral mat member. The moisture-proof film of the outer wall side moisture-proof waterproof wind-proof layer is formed larger than the fiber mat that is the heat insulating material layer and serves as an ear part. In the construction method of the wall structure of the building, the wall is inserted between the columns and the studs from the outside, and the ears are fixed to the back side of the pillars and the studs by means such as stapling. Furthermore, a trunk edge struck with a nail or the like is arranged outside the pillar and the inter-column, and an outer wall is fixed to the outer side of the trunk edge. And by this trunk edge, a ventilation layer is formed between an outer wall side moisture-proof waterproof windproof layer and an outer wall.

In addition, it has been proposed that a ventilation layer is formed on both sides of the heat insulating material, that is, between the inner wall and the outer wall. For example, in the heat insulating structure disclosed in Patent Document 2, an exterior material is attached to the outdoor side of the heat insulating layer via a heat insulating air layer, and an interior material is attached to the indoor side of the heat insulating layer via a space. In addition, a house disclosed in Patent Document 3 has been proposed as a ventilation layer formed on both sides of the heat insulating material. This structure is provided with an inner ventilation layer on the indoor side of the heat insulating material and an outer ventilation layer on the outdoor side, and the temperature in the room warms the air in the inner ventilation layer and the outer ventilation layer to cause an updraft, The small attic is heated to melt the snow on the roof and let the snow fall.
JP 2000-8508 A Japanese Patent Laid-Open No. 11-71835 JP 2002-21371 A

  The structure disclosed in Patent Document 1 of the above prior art has good workability using an inexpensive fiber-based heat insulating material, prevents condensation in the heat insulating material layer, and extends the life of the heat insulating material layer. However, since a fiber-based heat insulating material is used, the fiber-based heat insulating material is inferior in heat insulating effect compared to a plate-shaped heat insulating material such as foamed styrene.

  In the structure disclosed in Patent Document 2, the heat insulating layer is made of an extruded foamed styrene resin, and the heat insulating effect is relatively high, but the cost is high. In the structure disclosed in Patent Document 3, an inner ventilation layer and an outer ventilation layer are provided on both sides of the heat insulating material, and an upward air flow is generated, so that heat in the room can easily escape and it is difficult to keep the room temperature constant. It was.

  The present invention has been made in view of the above-mentioned problems of the prior art, is simple and inexpensive to construct, ensures the protection of the moisture-proof layer, which is the most important part of the fiber-based heat insulating material, and has high heat insulation. It aims at providing the wall heat insulation structure which has an effect.

The present invention is a heat insulating structure of a wall of a wooden house constructed by a conventional frame construction method, an inner wall facing the room, a still air part provided on the outdoor side of the inner wall, and the still air part a heat insulating mat made of fiber-based insulation chamber on one side are arranged outside the moisture-proof sheet provided with a vent which is provided in the chamber outside of the insulating mat, it is provided in the chamber outside of the vent portion the outer wall is provided, the static air portion between the insulating mat and the inner wall, the moisture-proof sheet is heat insulating ear portions provided on four sides extending from the peripheral edge of the mat, square the still air unit It is a wall heat insulation structure which becomes a still air layer which is fixed to the shaft member of the wooden house by a moisture-proof sheet presser edge located around and closed by the ear portion . The width of the still air portion in the wall thickness direction is 40 mm or less and 10 mm or more, preferably 30 mm or less and 20 mm or more.

  The heat insulating mat is a glass wool that is a fiber-based heat insulating material formed in a plate shape, a moisture-proof sheet that is attached to one side surface of the glass wool and is slightly larger than the glass wool surface, and a side surface opposite to the glass wool. A side film of the glass wool, and a back film that covers the four end surfaces continuous to the side surface and is joined to the moisture-proof sheet, and a peripheral edge of the moisture-proof sheet extends to the side of the glass wool and The ear portion is attached to and fixed to the shaft member of the wooden house by the moisture-proof sheet pressing edge to seal the static air portion.

  The heat insulating mat is set so that the back film faces the outdoor side and the moisture-proof sheet faces the indoor side, and the ear portion positioned below is engaged with the floor base material and the moisture-proof sheet pressing edge. The ear portion positioned above and sandwiched between the trunk difference and the moisture-proof sheet presser edge is locked and the pair of ear portions positioned in the vertical direction is sandwiched between the pillar or the intermediate column and the moisture-proof sheet presser edge. Are locked.

  The still air part has a moisture-proof sheet presser edge as a spacer and has a constant width. Further, an additional heat insulating material is laminated on the outer side of the heat insulating mat, and the outer wall is provided on the additional heat insulating material with a ventilation portion interposed therebetween.

  The wall heat insulating structure of the present invention has a high heat insulating effect by using an inexpensive fiber heat insulating material. Furthermore, the structure is simple and construction is easy, and it is also possible to ensure and maintain moisture resistance.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show a first embodiment of the present invention. A wall heat insulating structure 10 according to this embodiment is provided with a fabric foundation 12 on the ground as shown in FIG. A base 16 is provided through the packing 14 and is constructed by a conventional shaft construction method.

  A thick airtight face material 20, which is a structural plywood, is affixed almost horizontally to the base 16, and an elongated end positioning material 18 having a thickness equal to that of the airtight face material 20 is fixed to a side edge of the base 16. On the back surface of the airtight surface member 20 and surrounded by the base 16 and other horizontal members, a large draw insulating material 22 made of a foamed resin plate or a mat of fiber-based heat insulating material is provided.

  As shown in FIG. 2, the base 16 is provided with a plurality of pillars 26 substantially vertically, and between the pillars 26, a plurality of spacers 28 are provided in parallel with each other at regular intervals. . A trunk difference 30 is provided on the pillars 26 and the inter-posts 28. On the trunk difference 30, a column 26 and an inter-column 28 forming the second floor portion of the house are provided. A girder 32 is provided on the pillar 26 of the second floor portion, and a roof structure (not shown) is provided on the girder 32.

  A heat insulating mat 34 is attached between the columns 26 and the inter-columns 28. As shown in FIG. 3, the heat insulating mat 34 is provided with glass wool 36 that is a fiber-based heat insulating material arranged in a thin rectangular shape, and a moisture-proof sheet 38 that is slightly larger than the glass wool 36 is provided on one side surface 36 a of the glass wool 36. It is attached. The moisture-proof sheet 38 is made of a polyethylene film, and the peripheral part of the moisture-proof sheet 38 becomes an ear part 40 located on the side of the glass wool 36, and the ear part 40 makes a round around the outer periphery of the glass wool 36. A back film 42 is attached to the opposite side surface 36 b of the glass wool 36. The back film 42 is a polyethylene film provided with a plurality of small through holes, and is welded or bonded to the moisture-proof sheet 38 so as to cover the side surface 36b of the glass wool 36 and the four surfaces continuous to the side surface 36b. The back film 42 has a large number of fine holes and has a capability of discharging water vapor that has entered the heat insulating layer made of glass wool 36.

  The heat insulating mat 34 is set so that the back film 42 faces the outdoor side and the moisture-proof sheet 38 faces the indoor side. As shown in FIG. 1, the ear | edge part 40 located in the downward direction in a construction state is bend | folded indoors along the airtight surface material 20, and the moisture-proof sheet pressing edge 44 is mounted from the upper part in the bent part. The moistureproof sheet pressing edge 44 and the airtight surface member 20 are sandwiched and fixed. On the indoor side of the moisture-proof sheet pressing edge 44, a floor material 46 is provided along the airtight surface material 20, and an inner wall 48 is provided at a corner formed by the floor material 46 and the moisture-proof sheet pressing edge 44. A nail is driven into the moisture-proof sheet presser edge 44 from above, penetrates the airtight face material 20, and is fixed to the base 16. Further, the moisture-proof sheet presser edge 44 is used as an interior base material, and a baseboard 49 is provided along the floor material 46 at the lower end portion on the indoor side of the inner wall 48, and nails are driven into the baseboard 49. 48, reaches the moisture-proof sheet pressing edge 44 and is fixed.

  The ear portion 40 located above the heat insulating mat 34 is folded inward along the trunk difference 30, and the bent portion abuts the moistureproof sheet presser edge 50 from below, so that the moistureproof sheet presser edge 50 and the trunk difference are in contact with each other. 30 is sandwiched and locked. An upper end edge portion of the inner wall 48 abuts on the indoor side of the moisture-proof sheet pressing edge 50, and a surrounding edge 52 is attached to the outer side of the inner wall 48. A nail is driven into the peripheral edge 52, passes through the inner wall 48, reaches the moisture-proof sheet pressing edge 50, and is fixed. A ceiling material 54 is provided on the surrounding edge 52.

  As shown in FIG. 2, the ear portions 40 on both sides positioned in the longitudinal direction of the heat insulating mat 34 extend along the interior side surface of the pillar 26 or the inter-post 28, and the moisture-proof sheet presser edge 58 is formed along the pillar 26 or the inter-post 28. Is provided in contact with the interior side, and is sandwiched and locked between the moisture-proof sheet pressing edge 58 and the column 26 or the inter-column 28. When the ear portions 40 of a pair of adjacent heat insulating mats 34 are overlapped with each other, they are sandwiched and locked between the intermediate post 28 and the moisture-proof sheet pressing edge 58 in a state of being overlapped with each other. The moisture-proof sheet pressing edge 58 abuts on the outdoor side surface of the inner wall 48 and functions as a spacer for forming a static air portion 56 described later and as a fixing portion for the inner wall 48. Then, nails are struck from the inner wall 48 to the moisture-proof sheet pressing edge 58 and fixed.

  Between the heat insulating mat 34 and the inner wall 48, a still air portion 56 that is a space in which the widths of the moisture-proof sheet pressing edges 44, 50, and 58 are opened is provided. The stationary air portion 56 is closed by being surrounded by the pillar 26, the inner wall 48, and the moisture-proof sheet 38 of the heat insulating mat 34, and is in a stationary state without air movement or convection. The thickness of the static air part 56 is set to 30 mm or less and 20 mm or more, for example. If the thickness of the static air portion 56 is, for example, thicker than 45 mm, air convection easily occurs in the static air portion 56 and the heat insulation performance is deteriorated. The protective effect to 34 moisture-proof layers becomes low.

  A commonly used waterproof and moisture permeable sheet (not shown) is provided on the outdoor side of the pillars 26 and 28, and an outer wall base drum edge 60 is attached. An outer wall 62 is provided outside the outer wall base drum edge 60. . A ventilation portion 64 is provided between the heat insulating mat 34 attached to the column 26 or the intermediate column 28 and the outer wall 62 by opening the width of the outer wall base barrel edge 60. The ventilation portion 64 reaches the roof structure from the vicinity of the fabric foundation 12 and is open to the outside air.

  According to the wall heat insulating structure 10 of this embodiment, the static air portion 56 is provided between the heat insulating mat 34 and the inner wall 48 of the fiber heat insulating material, and the static air portion 56 has a high heat insulating effect as a static air layer and is low. It is possible to suppress the influence of changes in the outside air temperature with the cost, to keep the indoor temperature constant, and to make a comfortable environment with low utility costs. In particular, when the width of the still air portion 56 in the wall thickness direction is 30 mm or less, a static air layer is formed, and air has a low thermal conductivity, so that a high heat insulating effect can be obtained. In addition, the ordinary conventional wooden structure and construction man-hours are almost the same, no special parts or processes are required, and workability is good.

  Further, since the static air portion 56 is provided between the inner wall 48 and the heat insulating mat 34, even if a nail or the like is hit on the inner wall 48, it does not reach the moistureproof sheet 38 of the heat insulating mat 34. Without being opened or damaged, moisture resistance can be maintained, occurrence of dew condensation in the wall can be suppressed, and heat insulation of the glass wool 36 can be maintained. Since the moisture-proof sheet presser edges 50 and 58 are located outside the inner wall 48, the nail is positioned to coincide with the moisture-proof sheet presser edges 50 and 58 for protection of the moisture-proof layer which is a problem in the construction of the glass wool 36. By hitting, the moisture-proof sheet 38 is not damaged, and the nail can be fixed securely.

  The moisture-proof sheet presser edges 50 and 58 can be used as a base material when the inner wall 48, the baseboard 49, and the peripheral edge 52 are nailed. Since the inner wall 48 is fixed to the moisture-proof sheet presser edges 50 and 58, if the inner wall 48 is strong, the inner wall 48 is treated as a bearing-type bearing wall, which leads to an improvement in the bearing performance. For example, when the dimensions of the moisture-proof sheet pressing edges 50 and 58 are set to 30 mm × 40 mm or more, the standard as a certain load-bearing wall can be satisfied.

  Furthermore, the moisture-proof sheet pressing edge 58 can also serve as an interior base material, and the member can be used efficiently.

  In addition, the installation of the switch box and outlet box and wiring are easy because there is a static air part 56 by the moistureproof sheet presser edges 44, 50, and 58. By covering the switch box and outlet box with an airtight material, it is ensured. It is also possible to obtain an airtight performance. Further, the glass wool 36 of the heat insulating mat 34 is inexpensive, and the heat insulating performance of the glass wool 36 is slightly increased and a heat insulating effect is added by the layer of the static air of the static air portion 56, so that the heat insulating method is compared with the heat insulating method using the plastic heat insulating material. The performance is improved and the cost reduction and the heat insulation performance can be improved at the same time.

  Next, a second embodiment of the present invention will be described with reference to FIG. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the wall heat insulating structure 66 of this embodiment, a plurality of pillars 26 are provided, and a plurality of intermediate pillars 28 are provided between the pillars 26 at regular intervals. A heat insulating mat 34 is attached between the columns 26 and the inter-columns 28. As shown in FIG. 3, the heat insulating mat 34 has glass wool 36 covered with a moisture-proof sheet 38 and a back film 42, and an ear 40 is provided around the glass wool 36.

  The heat insulating mat 34 is set so that the back film 42 faces the outdoor side and the moisture-proof sheet 38 faces the indoor side. The ears 40 on the entire circumference of the heat insulating mat 34 are fixed in contact with the interior side by a moisture-proof sheet pressing edge 58 or the like. An inner wall 48 is provided on the indoor side of the moisture-proof sheet pressing edge 58, and a static air portion 56, which is a space having a wide width such as the moisture-proof sheet pressing edge 58, is provided between the heat insulating mat 34 and the inner wall 48. .

  Further, an additional heat insulating material 68 made of plate-like glass wool is attached to the outdoor sides of the columns 26 and the inter-columns 28. The material and form of the additional heat insulating material 68 can be freely selected. An outer wall base drum edge 60 is attached to the outdoor side of the additional heat insulating material 68, and an outer wall 62 is provided outside the outer wall base drum edge 60. Between the additional heat insulating material 68 and the outer wall 62, a ventilation portion 64 that is a breathable space by opening the width of the outer wall base trunk edge 60 is provided. The ventilation portion 64 reaches the roof structure from the vicinity of the fabric foundation 12 and is open to the outside air.

  According to the wall heat insulation structure 66 of this embodiment, since the still air layer is provided in the still air portion 56 as in the above embodiment, the heat insulation effect is high, the influence of changes in the outside air temperature is suppressed, and the indoor temperature Can be maintained at a constant level, and a comfortable environment can be achieved with low utility costs. Furthermore, since the additional heat insulating material 68 is provided on the outdoor side of the heat insulating mat 34, the heat insulating property can be further improved.

  In addition, the wall heat insulation structure of this invention is not limited to each said embodiment, The shape, the number, thickness, a raw material, etc. of each member can be changed suitably, for example, the moisture-proof sheet | seat of a heat insulation mat, a back film, a fiber type heat insulating material These materials can be changed as appropriate. The order of construction can be set freely. It can also be used for houses with various structures.

It is a longitudinal cross-sectional view of the wall heat insulation structure of 1st embodiment of this invention. It is a cross-sectional view of the wall heat insulation structure of this embodiment. It is a partially broken perspective view of the heat insulation mat of the wall heat insulation structure of this embodiment. It is a longitudinal cross-sectional view of the wall heat insulation structure of 2nd embodiment of this invention. It is a longitudinal cross-sectional view of the wall insulation structure of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wall heat insulation structure 20 Airtight surface material 26 Column 28 Intermediary column 30 Body difference 34 Heat insulation mat 36 Glass wool 38 Moisture-proof sheet 40 Ear part 42 Back surface films 44, 50, 58 Moisture-proof sheet pressing edge 46 Floor material 48 Inner wall 52 Circumference edge 56 Still air part 62 Outer wall 64 Ventilation part

Claims (6)

In the heat insulating structure of the walls of wooden houses which are building the framing method, an inner wall facing the chamber, a stationary air portion provided on the outdoor side of the inner wall, the one surface is the chamber disposed outside of the stationary air unit the heat insulating mat moisture sheet consists of fiber-based heat insulating material provided, wherein a heat insulating vent the chamber provided outside of the mat, the outer wall which is provided in the chamber outside of the vent is provided, and the inner wall the still air portion between the heat-insulating mat, wherein the moisture-proof sheet is heat insulating ear portions provided on four sides extending from the peripheral edge of the mat, the moisture-proof sheet presser edge located around the four sides of the stationary air unit The wall heat insulating structure is characterized in that it becomes a still air layer that is fixed to the shaft member of the wooden house and closed by the ear portion .   The wall heat insulating structure according to claim 1, wherein a width of the still air portion in a wall thickness direction is 40 mm or less and 10 mm or more.   The heat insulating mat is a glass wool that is a fiber-based heat insulating material formed in a plate shape, a moisture-proof sheet that is attached to one side surface of the glass wool and is slightly larger than the glass wool surface, and a side surface opposite to the glass wool. A side film of the glass wool, and a back film that covers the four end surfaces continuous to the side surface and is joined to the moisture-proof sheet, and a peripheral edge of the moisture-proof sheet extends to the side of the glass wool and 2. The wall heat insulating structure according to claim 1, wherein the ear portion is attached and fixed to a shaft member of the wooden house by the moisture-proof sheet pressing edge to seal the static air portion.   The heat insulating mat is set so that the back film faces the outdoor side and the moisture-proof sheet faces the indoor side, and the ear portion positioned below is engaged with the floor base material and the moisture-proof sheet pressing edge. The ear portion positioned above and sandwiched between the trunk difference and the moisture-proof sheet presser edge is locked and the pair of ear portions positioned in the vertical direction is sandwiched between the pillar or the intermediate column and the moisture-proof sheet presser edge. The wall heat insulating structure according to claim 3, wherein the wall heat insulating structure is locked.   The wall heat insulating structure according to claim 4, wherein the still air portion has a moisture-proof sheet pressing edge as a spacer and has a constant width.   4. The wall heat insulating structure according to claim 3, wherein an additional heat insulating material is laminated on an outer side of the heat insulating mat, and the outer wall is provided on the additional heat insulating material with a ventilation portion interposed therebetween.

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