JP2012246720A - Heat insulation structure of wooden building - Google Patents

Heat insulation structure of wooden building Download PDF

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JP2012246720A
JP2012246720A JP2011121411A JP2011121411A JP2012246720A JP 2012246720 A JP2012246720 A JP 2012246720A JP 2011121411 A JP2011121411 A JP 2011121411A JP 2011121411 A JP2011121411 A JP 2011121411A JP 2012246720 A JP2012246720 A JP 2012246720A
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floor
heat insulating
heat insulation
wooden building
insulating layer
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Hiroaki Shinkai
広明 新開
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Misawa Homes Co Ltd
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Misawa Homes Co Ltd
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Priority to JP2011121411A priority Critical patent/JP2012246720A/en
Priority to CN201210111826.6A priority patent/CN102808457B/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/24—Structural elements or technologies for improving thermal insulation
    • Y02A30/244—Structural elements or technologies for improving thermal insulation using natural or recycled building materials, e.g. straw, wool, clay or used tires

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulation structure of wooden building which can surely insulate floor concrete on the first floor and the surroundings from the heat.SOLUTION: Heat insulation layers 33 and 34 are installed in side faces of floor concrete 31 composing a dirt floor 30 on the first floor, and the heat insulation layers 33 and 34 extend to below the floor concrete 31. Foundation standing parts 2 and 2 adjacent to the floor concrete 31 and taller than the floor concrete 31 are installed, and the heat insulation layers 33 and 34 are installed in the foundation standing parts 2 and 2. Accordingly the floor concrete 31 on the first floor and the surroundings can be surely insulated from the heat.

Description

本発明は、木造建物の断熱構造に関する。   The present invention relates to a heat insulating structure for a wooden building.

木造建物の断熱構造の一例として特許文献１に記載のものが知られている。この木造建物の断熱構造では、基礎の外側を、板状の断熱材からなる基礎用断熱材で覆うとともに、この基礎用断熱材の下側の一部を、地盤面より下に埋設するようにしている。   The thing of patent document 1 is known as an example of the heat insulation structure of a wooden building. In this heat insulation structure of a wooden building, the outside of the foundation is covered with a foundation insulation made of plate-like insulation, and a part of the lower side of the foundation insulation is buried below the ground surface. ing.

実用新案登録第３１００５６３号公報Utility Model Registration No. 3100563

ところで、前記従来の木造建物の断熱構造では、基礎の外側を、板状の断熱材からなる基礎用断熱材で覆うようにしているが、建物の１階に土間床を構成する土間コンクリートを設けた場合に、この土間コンクリートとその周囲との断熱をどのようにして行うかについては何ら開示されていない。   By the way, in the heat insulation structure of the conventional wooden building, the outside of the foundation is covered with the heat insulating material for the foundation made of a plate-like heat insulating material, but the soil concrete constituting the earth floor is provided on the first floor of the building. In such a case, it is not disclosed at all how to insulate the soil concrete and its surroundings.

本発明は上記事情に鑑みてなされたもので、１階の土間コンクリートとその周囲とを確実に断熱できる木造建物の断熱構造を提供することを課題としている。   This invention is made | formed in view of the said situation, and makes it the subject to provide the heat insulation structure of the wooden building which can heat-insulate the soil concrete of the first floor and the circumference | surroundings reliably.

上記課題を解決するために、請求項１に記載の発明は、例えば図１および図６に示すように、木造建物の断熱構造であって、
１階の土間床３０を構成する土間コンクリート３１の側部に断熱層３３，３４が設けられており、
この断熱層３３，３４が前記土間コンクリート３１より下方に延出していることを特徴とする。 In order to solve the above problems, the invention described in claim 1 is a heat insulating structure of a wooden building, for example, as shown in FIGS.
Insulating layers 33 and 34 are provided on the sides of the soil concrete 31 constituting the ground floor 30 on the first floor,
The heat insulating layers 33 and 34 are characterized by extending downward from the soil concrete 31.

請求項１に記載の発明によれば、１階の土間コンクリート３１の側部に設けられた断熱層３３，３４が土間コンクリート３１より下方に延出しているので、１階の土間コンクリート３１とその周囲とを確実に断熱できる。   According to invention of Claim 1, since the heat insulation layers 33 and 34 provided in the side part of the soil concrete 31 of the 1st floor are extended below from the soil concrete 31, the soil concrete 31 of the 1st floor and its The surroundings can be reliably insulated.

請求項２に記載の発明は、請求項１に記載の木造建物の断熱構造において、
前記土間コンクリート３１に隣接して当該土間コンクリート３１より高い基礎立上り部２，２が設けられており、
この基礎立上り部２，２に前記断熱層３３，３４が設けられていることを特徴とする。 Invention of Claim 2 is the heat insulation structure of the wooden building of Claim 1,
Adjacent to the soil concrete 31, there are provided foundation rising portions 2 and 2 higher than the soil concrete 31,
The heat-insulating layers 33 and 34 are provided on the basic rising portions 2 and 2.

請求項２に記載の発明によれば、基礎立上り部２，２に断熱層３３，３４が設けられているので、断熱層３３，３４を土間コンクリート３１の側部に容易に設けることができ、さらに、基礎立上り部２，２の断熱を容易に行える。   According to invention of Claim 2, since the heat insulation layers 33 and 34 are provided in the foundation rising parts 2 and 2, the heat insulation layers 33 and 34 can be easily provided in the side part of the soil concrete 31, Furthermore, it is possible to easily insulate the basic rising portions 2 and 2.

請求項３に記載の発明は、請求項２に記載の木造建物の断熱構造において、
前記基礎立上り部２に１階の床４が設置され、この床４の床下空間４ａに面する前記基礎立上り部２の外面に前記断熱層３３が設けられ、前記床４の下面に床断熱層７が設けられていることを特徴とする。 Invention of Claim 3 is the heat insulation structure of the wooden building of Claim 2,
A floor 4 on the first floor is installed on the foundation rising portion 2, the heat insulating layer 33 is provided on the outer surface of the foundation rising portion 2 facing the underfloor space 4 a of the floor 4, and a floor heat insulating layer is formed on the lower surface of the floor 4. 7 is provided.

請求項３に記載の発明によれば、基礎立上り部２の外面に設けられた断熱層３３と、床の下面に設けられた床断熱層７とによって、床下空間４ａと、土間を含む１階との断熱を確実に行うことができる。   According to the invention described in claim 3, the first floor including the underfloor space 4 a and the soil is provided by the heat insulating layer 33 provided on the outer surface of the foundation rising portion 2 and the floor heat insulating layer 7 provided on the lower surface of the floor. Can be reliably insulated.

請求項４に記載の発明は、請求項２または３に記載の木造建物の断熱構造において、
前記基礎立上り部２に１階の外壁４０が設けられ、この外壁４０が設けられた基礎立上り部２の内面に前記断熱層３４が設けられ、前記外壁４０に壁断熱層１３が設けられていることを特徴とする。 Invention of Claim 4 in the heat insulation structure of the wooden building of Claim 2 or 3,
The foundation rising portion 2 is provided with an outer wall 40 on the first floor, the heat insulating layer 34 is provided on the inner surface of the foundation rising portion 2 provided with the outer wall 40, and the wall heat insulating layer 13 is provided on the outer wall 40. It is characterized by that.

請求項４に記載の発明によれば、基礎立上り部２の内面に設けられた断熱層３４と１階の外壁４０に設けられた壁断熱層１３とによって、外部と土間との断熱を確実に行うことができる。   According to the fourth aspect of the present invention, the heat insulation layer 34 provided on the inner surface of the foundation rising portion 2 and the wall heat insulation layer 13 provided on the outer wall 40 on the first floor ensure heat insulation between the outside and the soil. It can be carried out.

請求項５に記載の発明は、請求項４に記載の木造建物の断熱構造において、
前記１階の外壁４０の上端部から２階の床１６が突出しており、
この突出している２階の床１６ａの下面に床断熱層４１が設けられていることを特徴とする。 Invention of Claim 5 is the heat insulation structure of the wooden building of Claim 4,
The floor 16 on the second floor protrudes from the upper end of the outer wall 40 on the first floor,
A floor heat insulating layer 41 is provided on the lower surface of the protruding second floor 16a.

請求項５に記載の発明によれば、突出している２階の床１６ａの下面に設けられた床断熱層４１によって、この床上の２階の部屋と外部との断熱を確実に行うことができる。   According to the fifth aspect of the present invention, the floor heat insulating layer 41 provided on the lower surface of the protruding second floor 16a can surely insulate the second floor room on the floor from the outside. .

請求項６に記載の発明は、請求項１〜５のいずれか一項に記載の木造建物の断熱構造において、
外気に面する前記木造建物の部分に、それぞれ断熱層が設けられており、これら断熱層による前記木造建物の断熱性を示す熱損失係数（Ｑ値）が２．７W/m2K以下に設定されていることを特徴とする。
ここで、前記断熱層としては、例えば、床断熱層７、壁断熱層１３，４４、天井断熱層２０、勾配天井断熱層２４、床断熱層４１、基礎断熱層３３，３４が挙げられる。 Invention of Claim 6 is the heat insulation structure of the wooden building as described in any one of Claims 1-5,
Each of the wooden buildings facing the outside air is provided with a heat insulating layer, and the heat loss coefficient (Q value) indicating the heat insulating property of the wooden building by these heat insulating layers is set to 2.7 W / m 2 K or less. It is characterized by being.
Here, as said heat insulation layer, the floor heat insulation layer 7, the wall heat insulation layers 13 and 44, the ceiling heat insulation layer 20, the gradient ceiling heat insulation layer 24, the floor heat insulation layer 41, and the basic heat insulation layers 33 and 34 are mentioned, for example.

請求項６に記載の発明によれば、断熱層による木造建物の断熱性を示す熱損失係数（Ｑ値）が２．７W/m2Kに設定されているので、高断熱の木造建物を提供できる。 According to the invention described in claim 6, since the heat loss coefficient (Q value) indicating the heat insulation property of the wooden building by the heat insulating layer is set to 2.7 W / m 2 K, a highly insulated wooden building is provided. it can.

本発明によれば、１階の土間コンクリートの側部に断熱層が設けられており、この断熱層が前記土間コンクリートより下方に延出しているので、１階の土間コンクリートとその周囲とを確実に断熱できる。   According to the present invention, a heat insulating layer is provided on the side of the first floor of the soil concrete, and this heat insulating layer extends downward from the soil concrete, so that the first floor of the soil concrete and its surroundings can be surely provided. Can be insulated.

本発明に係る断熱構造を備えた木造建物の概略を示すもので、その側断面図である。BRIEF DESCRIPTION OF THE DRAWINGS The outline of the wooden building provided with the heat insulation structure which concerns on this invention is shown, and it is the sectional side view. 同、図１におけるＡ円部の拡大図である。FIG. 2 is an enlarged view of a circle A portion in FIG. 1. 同、図１におけるＢ円部の拡大図である。FIG. 2 is an enlarged view of a B circle portion in FIG. 1. 同、図１におけるＣ円部の拡大図である。It is an enlarged view of the C circle part in FIG. 同、図１におけるＤ円部の拡大図である。FIG. 2 is an enlarged view of a D circle portion in FIG. 1. 同、図１における土間部分の拡大図である。FIG. 2 is an enlarged view of a dirt portion in FIG. 同、図１におけるＥ円部の拡大図である。It is an enlarged view of the E circle part in FIG. 同、１階内部柱脚部分を示すもので、（ａ）は斜視図、（ｂ）は正断面図、（ｃ）は平断面図である。The 1st floor internal column base part is shown, (a) is a perspective view, (b) is a front sectional view, (c) is a plan sectional view.

以下、図面を参照して本発明に係る木造建物の断熱構造の一例について説明する。
図１は、本発明に係る断熱構造を備えた木造建物の概略を示す側断面図である。この木造建物は、在来の軸組工法によって構築されたものである。そして、柱、梁、土台、大引等を構成する軸組部材は、それぞれ集成材によって形成されている。集成材とは、木材又は異種材からなる単材を複数集成してなるものである。 Hereinafter, an example of a heat insulating structure of a wooden building according to the present invention will be described with reference to the drawings.
FIG. 1 is a side sectional view showing an outline of a wooden building having a heat insulating structure according to the present invention. This wooden building was built by a conventional frame construction method. And the axial member which comprises a pillar, a beam, a foundation, a large drawing, etc. is each formed with the laminated material. The laminated material is a material obtained by assembling a plurality of single materials made of wood or different materials.

図１および図２に示すように、基礎１の基礎立上り部２の上端面には、換気台輪３が設置されており、この換気台輪３に１階の床４の端部が設置されている。１階の床４は、前記換気台輪３に設置された土台５と、この土台５に固定された図示しない大引や根太と、これらの上面に敷設された合板等からなる床板材６とによって構成されている。床４の床板材６の下面には、床断熱層７が設けられている。この床断熱層７は、ポリスチレンフォームで形成された断熱材７によって構成されている。   As shown in FIG. 1 and FIG. 2, a ventilation pedestal 3 is installed on the upper end surface of the foundation rising portion 2 of the foundation 1, and the end of the floor 4 on the first floor is installed on the ventilation pedestal 3. ing. The floor 4 on the first floor is composed of a base 5 installed on the ventilation base 3, an unillustrated large drawing or joist fixed to the base 5, and a floor board material 6 made of plywood or the like laid on the upper surface thereof. It is constituted by. A floor heat insulating layer 7 is provided on the lower surface of the floor plate material 6 of the floor 4. This floor heat insulation layer 7 is comprised by the heat insulating material 7 formed with the polystyrene foam.

前記土台５上には１階の外壁１０が立設されている。この外壁１０は、図３に示すように、外壁本体１１と、この外壁本体１１の表面に取り付けられた外装材１２とから構成されている。
外壁本体１１には壁断熱層１３が設けられている。すなわち、外壁本体１１は、土台５に立設された複数の柱および間柱と、これら柱および間柱の外側を向く面に取り付けられた合板１１ａと、柱および間柱の内側を向く面に取り付けられた石膏ボード１１ｂとを備えており、合板１１ａと石膏ボード１１ｂとの間に、グラスファイバーで形成された断熱材１３が設けられ、この断熱材１３が壁断熱層１３を構成している。
なお、外壁本体１１には継目受材１４が設けられており、この継目受材１４に上下に隣接する石膏ボード１１ｂ，１１ｂの下端部と上端部とが突き合わせられた状態で固定されている。
外装材１２は胴縁１２ａを介して前記合板１１ａに取り付けられおり、合板１１ａと外装材１２との間には胴縁１２ａの厚さ分に相当する隙間が設けられている。 An outer wall 10 on the first floor is erected on the base 5. As shown in FIG. 3, the outer wall 10 includes an outer wall main body 11 and an exterior material 12 attached to the surface of the outer wall main body 11.
The outer wall main body 11 is provided with a wall heat insulating layer 13. That is, the outer wall main body 11 is attached to a plurality of columns and inter-columns erected on the base 5, a plywood 11 a attached to a surface facing the outside of these columns and inter-columns, and a surface facing the inside of the columns and inter-columns. A gypsum board 11 b is provided, and a heat insulating material 13 made of glass fiber is provided between the plywood 11 a and the gypsum board 11 b, and the heat insulating material 13 constitutes the wall heat insulating layer 13.
The outer wall main body 11 is provided with a seam receiving material 14 and is fixed in a state where the lower end portion and the upper end portion of the gypsum board 11b, 11b adjacent to the seam receiving material 14 are vertically opposed.
The exterior material 12 is attached to the plywood 11a via the trunk edge 12a, and a gap corresponding to the thickness of the trunk edge 12a is provided between the plywood 11a and the exterior material 12.

１階の外壁１０の外壁本体１１の上端部には胴差１５が設置されている。この胴差１５は集成材によって形成されたものである。胴差１５には図示しない床梁が固定され、さらに、これらの上面に床板材６が敷設されることによって、２階の床１６が構成されている。２階の床１６の下方には、１階の天井１７が設けられており、この天井１７の裏面（上面）に、グラスウール等で形成された遮音材１７ａが設けられている。   A trunk difference 15 is installed at the upper end of the outer wall body 11 of the outer wall 10 on the first floor. The trunk difference 15 is formed by a laminated material. A floor beam (not shown) is fixed to the trunk difference 15, and a floor board 6 is laid on the upper surface thereof, thereby forming a floor 16 on the second floor. A first-floor ceiling 17 is provided below the second-floor floor 16, and a sound insulating material 17 a formed of glass wool or the like is provided on the back surface (upper surface) of the ceiling 17.

前記胴差１５上には２階の外壁１０が立設されている。この外壁１０は、図４に示すように、外壁本体１１と、この外壁本体１１の表面に取り付けられた外装材１２とから構成され、１階の外壁１０と同様の構成となっている。
２階の外壁１０の上端部には２階の天井１８が設けられており、この天井の裏面（上面）には、天井断熱層２０が設けられている。この天井断熱層２０は、グラスウール等で形成された断熱材２０によって構成されている。天井１８は天井野縁１８ａとこの天井野縁１８ａの下面に取り付けられた天井材１８ｂとを備え、天井材１８ｂと天井野縁１８ａとの間に気密シート１８ｃが設けられている。
なお、外壁本体１１には継目受材１４が設けられており、この継目受材１４に上下に隣接する石膏ボード１１ｂ，１１ｂの下端部と上端部とが突き合わせられた状態で固定されている。 On the trunk difference 15, an outer wall 10 on the second floor is erected. As shown in FIG. 4, the outer wall 10 includes an outer wall main body 11 and an exterior material 12 attached to the surface of the outer wall main body 11 and has the same configuration as the outer wall 10 on the first floor.
A ceiling 18 on the second floor is provided at the upper end portion of the outer wall 10 on the second floor, and a ceiling heat insulating layer 20 is provided on the back surface (upper surface) of the ceiling. The ceiling heat insulating layer 20 is constituted by a heat insulating material 20 formed of glass wool or the like. The ceiling 18 includes a ceiling field edge 18a and a ceiling material 18b attached to the lower surface of the ceiling field edge 18a, and an airtight sheet 18c is provided between the ceiling material 18b and the ceiling field edge 18a.
The outer wall main body 11 is provided with a seam receiving material 14 and is fixed in a state where the lower end portion and the upper end portion of the gypsum board 11b, 11b adjacent to the seam receiving material 14 are vertically opposed.

屋根２１は切妻屋根となっており、棟部から一方の軒先部までの長さが、棟部から他方の軒先部までの長さが短くなっている。
図４に示すように、屋根２１の一方の軒先部には、軒天井２２が設けられており、この軒天井２２に設けられた換気孔２２ａによって小屋裏の換気を行えるようになっている。
図５に示すように、屋根２１の他方の軒先部にも、軒天井２２が設けられており、この軒天井２２に設けられた換気孔２２ａによって小屋裏の換気を行えるようになっている。
屋根２１の他方の軒先部に隣接する屋根２１の一部の裏側には、小屋裏がなく、勾配天井２３が設けられている。この勾配天井２３の裏面には、勾配天井断熱層２４が設けられている。この勾配天井断熱層２４は、グラスウール等で形成された断熱材２４によって構成されている。そして、勾配天井断熱層２４は２階の天井１８の裏面に設けられた天井断熱層２０と連続している。 The roof 21 is a gable roof, and the length from the ridge to one of the eaves is short, and the length from the ridge to the other eave is short.
As shown in FIG. 4, an eaves ceiling 22 is provided at one eave portion of the roof 21, and ventilation of the back of the hut can be performed by a ventilation hole 22 a provided in the eaves ceiling 22.
As shown in FIG. 5, an eaves ceiling 22 is also provided at the other eaves part of the roof 21, and ventilation of the back of the hut can be performed by a ventilation hole 22 a provided in the eaves ceiling 22.
On the back side of a part of the roof 21 adjacent to the other eaves part of the roof 21, there is no hut back and a sloped ceiling 23 is provided. A gradient ceiling heat insulation layer 24 is provided on the back surface of the gradient ceiling 23. The gradient ceiling heat insulating layer 24 is constituted by a heat insulating material 24 formed of glass wool or the like. And the gradient ceiling heat insulation layer 24 is following the ceiling heat insulation layer 20 provided in the back surface of the ceiling 18 of the 2nd floor.

図１および図６に示すように、１階には土間床３０を構成する土間コンクリート３１が設けられている。この土間コンクリート３１は、１階の床４より一段低い位置に設けられており、土間コンクリート３１の下方には割栗石３２が敷き詰められている。
土間コンクリート３１の側方には、基礎１の基礎立上り部２，２が設けられており、基礎立上り部２，２は土間コンクリート３１より高くなっている。基礎１は布基礎であり、平面視において建物の外周に沿って延在して形成されている。基礎１の下には割栗石３２が敷き詰められており、基礎１の内側の土間コンクリート３１を形成すべき部分には、割栗石３２が高く敷き詰められ、この割栗石３２の上面に前記土間コンクリート３１が施工されている。 As shown in FIG. 1 and FIG. 6, a soil concrete 31 constituting a soil floor 30 is provided on the first floor. The dirt concrete 31 is provided at a position one level lower than the floor 4 on the first floor, and the split stones 32 are spread below the dirt concrete 31.
On the side of the soil concrete 31, foundation rising portions 2 and 2 of the foundation 1 are provided, and the foundation rising portions 2 and 2 are higher than the soil concrete 31. The foundation 1 is a cloth foundation and is formed to extend along the outer periphery of the building in plan view. A split stone 32 is laid under the foundation 1, and a portion of the ground stone 31 inside the foundation 1 is formed with a crack stone 32, and the soil concrete 31 is placed on the upper surface of the crack stone 32. Is being constructed.

前記土間コンクリート３１の側部には、基礎断熱層（断熱層）３３，３４が土間コンクリート３１より下方に延出して設けられている。
すなわち、図６に示す左側の基礎立上り部２に、１階の床４の端部が気密台輪３５を介して設置され、この床４の床下空間４ａに面する基礎立上り部２の外面に基礎断熱層３３が設けられている。この基礎断熱層３３はポリスチレンフォームで形成された断熱材３３によって構成され、基礎立上り部２の下端から上端までの高さを有している。
また、前記基礎立上り部２に設置された１階の床４の床板材６の下面には、床断熱層７が設けられている。
したがって、床下空間４ａに面して、基礎断熱層３３、気密台輪３５、床断熱層７が連続しており、これによって、建物内と床下空間４ａとの断熱が行われている。 On the side of the soil concrete 31, basic heat insulation layers (heat insulation layers) 33 and 34 are provided extending downward from the soil concrete 31.
That is, the end of the floor 4 on the first floor is installed on the left foundation rising portion 2 shown in FIG. 6 via an airtight base wheel 35, and the outer surface of the foundation rising portion 2 facing the underfloor space 4 a of the floor 4 is provided. A basic heat insulating layer 33 is provided. The basic heat insulating layer 33 is constituted by a heat insulating material 33 formed of polystyrene foam, and has a height from the lower end to the upper end of the basic rising portion 2.
Further, a floor heat insulating layer 7 is provided on the lower surface of the floor board material 6 of the floor 4 on the first floor installed in the foundation rising portion 2.
Therefore, the foundation heat insulation layer 33, the airtight base ring 35, and the floor heat insulation layer 7 are continuous facing the underfloor space 4a, and thereby heat insulation is performed between the inside of the building and the underfloor space 4a.

また、図６に示す右側の基礎立上り部２の内面に前記基礎断熱層３４が設けられている。この基礎断熱層３４はポリスチレンフォームで形成された断熱材３４によって構成され、基礎立上り部２の下端から上端までの高さを有している。また、基礎断熱層３４は基礎断熱層３３より厚くなっている。
また、右側の基礎立上り部２には、１階の外壁４０が立設されている。この外壁４０は、外壁本体１１と、この外壁本体１１の表面に取り付けられた外装材１２とから構成され、１階の外壁１０と同様の構成となっている。
また、外壁４０には壁断熱層１３が設けられている。すなわち、外壁本体１１を構成する合板１１ａと石膏ボード１１ｂとの間にはグラスファイバーで形成された断熱材１３が設けられ、この断熱材１３が壁断熱層１３を構成している。 Moreover, the said basic heat insulation layer 34 is provided in the inner surface of the right foundation rising part 2 shown in FIG. The basic heat insulating layer 34 is constituted by a heat insulating material 34 formed of polystyrene foam, and has a height from the lower end to the upper end of the basic rising portion 2. Further, the basic heat insulating layer 34 is thicker than the basic heat insulating layer 33.
In addition, an outer wall 40 on the first floor is erected on the right foundation rising portion 2. This outer wall 40 is comprised from the outer wall main body 11 and the exterior material 12 attached to the surface of this outer wall main body 11, and has the structure similar to the outer wall 10 of the first floor.
The outer wall 40 is provided with a wall heat insulating layer 13. That is, a heat insulating material 13 formed of glass fiber is provided between the plywood 11 a and the gypsum board 11 b constituting the outer wall main body 11, and the heat insulating material 13 forms the wall heat insulating layer 13.

図１および図７に示すように、前記１階の外壁４０の上端部から前記２階の床１６が突出している。この突出している床１６ａの下面には床断熱層４１が設けられている。この床断熱層４１はグラスウール等で形成された断熱材４１によって構成されている。床１６ａの下方には外部天井４２が２階の天井１８と等しい高さに設けられており、この外部天井４２に設けられた換気孔４２ａによって外部天裏の換気を行えるようになっている。
外部天井４２の下方は駐車場となっており、前記外壁４０に面している。 As shown in FIGS. 1 and 7, the floor 16 on the second floor protrudes from the upper end of the outer wall 40 on the first floor. A floor heat insulating layer 41 is provided on the lower surface of the protruding floor 16a. The floor heat insulating layer 41 is constituted by a heat insulating material 41 formed of glass wool or the like. Below the floor 16a, an external ceiling 42 is provided at the same height as the ceiling 18 of the second floor, and ventilation of the external ceiling can be performed by a ventilation hole 42a provided in the external ceiling 42.
Below the external ceiling 42 is a parking lot and faces the outer wall 40.

また、突出している床１６ａの端部には、外壁４３が立設されている。この外壁４３は、外壁本体１１と、この外壁本体１１の表面に取り付けられた外装材１２とから構成され、１階の外壁４０と同様の構成となっている。
また、外壁４３には壁断熱層４４が設けられている。すなわち、外壁本体１１を構成する合板１１ａと石膏ボード１１ｂとの間にはグラスファイバーで形成された断熱材４４が設けられ、この断熱材４４が壁断熱層４４を構成している。
外壁４３の上端部には、図１および図５に示すように、前記屋根２１の他方の軒先部が設定されている。 Further, an outer wall 43 is erected on the end of the protruding floor 16a. The outer wall 43 includes an outer wall main body 11 and an exterior material 12 attached to the surface of the outer wall main body 11, and has the same configuration as the outer wall 40 on the first floor.
Further, a wall heat insulating layer 44 is provided on the outer wall 43. That is, a heat insulating material 44 made of glass fiber is provided between the plywood 11 a and the gypsum board 11 b constituting the outer wall main body 11, and this heat insulating material 44 forms the wall heat insulating layer 44.
As shown in FIGS. 1 and 5, the other eaves tip portion of the roof 21 is set at the upper end portion of the outer wall 43.

また、図８に示すように、１階の内部柱４５と１階の床４の合板等で形成された床板材６との接する部分は、土台５と大引４６との交点部分に隙間が生じるため、この隙間に発泡ウレタン等からなる気密材４７を充填することによって、気密性を確保する。   In addition, as shown in FIG. 8, a portion where the first floor internal pillar 45 and the floor board material 6 formed of plywood or the like on the first floor 4 are in contact with each other is a gap at the intersection of the base 5 and the large pull 46. Therefore, the airtightness is ensured by filling the gap with an airtight material 47 made of urethane foam or the like.

上記のような木造建物は、外気に面する部分に、それぞれ上記のような断熱層（床断熱層７、壁断熱層１３，４４、天井断熱層２０、勾配天井断熱層２４、床断熱層４１、基礎断熱層３３，３４）が設けられ、これら断熱層によって囲まれており、木造建物の断熱性を示す熱損失係数（Ｑ値＝建物から逃げる熱量（W/K）/建物の延べ床面積（m2））が２．７W/m2K以下に設定されている。したがって、外部（外気）と建物内とを確実に断熱することができ、高断熱の建物となる。 In the wooden building as described above, the heat insulating layers (floor heat insulating layer 7, wall heat insulating layers 13 and 44, ceiling heat insulating layer 20, gradient ceiling heat insulating layer 24, floor heat insulating layer 41, respectively, are provided on the part facing the outside air. Basic heat insulation layers 33, 34) are provided and are surrounded by these heat insulation layers, and the heat loss coefficient (Q value = amount of heat escaping from the building (W / K) / total floor area of the building) indicating the heat insulation of the wooden building (M 2 )) is set to 2.7 W / m 2 K or less. Therefore, the outside (outside air) and the inside of the building can be reliably insulated, and a highly insulated building is obtained.

熱損失係数（Ｑ値）は、住まいの断熱性能を示す値で、取り込んだエネルギーをいかに失わないかを表した数値であり、具体的には室内外の温度差が１℃のとき、家（木造建物）全体から１時間に床面積１ｍ2あたりに逃げ出す熱量のことを示し、Ｑ値が小さければ小さいほど、住宅の断熱性が高くなる。なお、図１において、ハッチングで示す部分が各断熱層を模式的に示している。
また、屋根２１に断熱層を設けずに、２階の天井１８に天井断熱層２０を設けたので、小屋裏を外気によって容易に換気できるとともに、屋根２１に断熱層を設ける場合に比べて、断熱層の長さを短くでき、コスト低減を図ることができる。 The heat loss coefficient (Q value) is a value indicating the heat insulation performance of the house, and is a numerical value indicating how the captured energy is not lost. Specifically, when the temperature difference between indoor and outdoor is 1 ° C, This indicates the amount of heat that escapes per 1 m 2 of floor area per hour from the whole wooden building). The smaller the Q value, the higher the thermal insulation of the house. In addition, in FIG. 1, the part shown by hatching has shown each heat insulation layer typically.
Moreover, since the ceiling heat insulation layer 20 is provided on the ceiling 18 on the second floor without providing the heat insulation layer on the roof 21, the back of the hut can be easily ventilated by outside air, and compared to the case where the heat insulation layer is provided on the roof 21, The length of the heat insulating layer can be shortened, and the cost can be reduced.

また、１階の土間コンクリート３１の側部に設けられた基礎断熱層３３，３４が土間コンクリート３１より下方に延出しているので、１階の土間コンクリート３１とその周囲とを確実に断熱できる。
さらに、土間コンクリートに隣接している基礎立上り部２に基礎断熱層３３，３４が設けられているので、基礎断熱層３３，３４を土間コンクリート３１の側部に容易に設けることができ、さらに、基礎立上り部２の断熱を容易に行える。 Moreover, since the foundation heat insulation layers 33 and 34 provided in the side part of the 1st floor soil concrete 31 are extended below the soil concrete 31, the 1st floor soil concrete 31 and its periphery can be insulated reliably.
Furthermore, since the foundation heat insulation layers 33 and 34 are provided in the foundation rising part 2 adjacent to the soil concrete, the foundation heat insulation layers 33 and 34 can be easily provided on the side of the soil concrete 31, Heat insulation of the foundation rising part 2 can be performed easily.

加えて、基礎立上り部２に１階の床４が設置され、この床４の床下空間４ａに面する基礎立上り部２の外面に基礎断熱層３３が設けられ、床４の下面に床断熱層７が設けられているので、これら基礎断熱層３３と床断熱層７とによって、床下空間４ａと、土間を含む１階との断熱を確実に行うことができる。
また、基礎立上り部２に１階の外壁４０が設けられ、この外壁４０が設けられた基礎立上り部２の内面に基礎断熱層３４が設けられ、外壁４０に壁断熱層１３が設けられているので、これら基礎断熱層３４と壁断熱層１３とによって、外部と土間との断熱を確実に行うことができる。
また、１階の外壁４０の上端部から２階の床１６が突出しており、この突出している２階の床１６ａの下面に床断熱層４１が設けられているので、床断熱層４１によって、床１６ａ上の２階の部屋と外部との断熱を確実に行うことができる。 In addition, a floor 4 on the first floor is installed in the foundation rising portion 2, a base heat insulation layer 33 is provided on the outer surface of the foundation rising portion 2 facing the underfloor space 4 a of the floor 4, and a floor heat insulation layer is formed on the lower surface of the floor 4. 7 is provided, the heat insulation between the underfloor space 4a and the first floor including the soil can be reliably performed by the basic heat insulation layer 33 and the floor heat insulation layer 7.
Further, the foundation rising portion 2 is provided with an outer wall 40 on the first floor, the foundation heat insulating layer 34 is provided on the inner surface of the foundation rising portion 2 provided with the outer wall 40, and the wall heat insulating layer 13 is provided on the outer wall 40. Therefore, the heat insulation between the outside and the soil can be reliably performed by the basic heat insulation layer 34 and the wall heat insulation layer 13.
Further, the second floor 16 protrudes from the upper end of the outer wall 40 on the first floor, and the floor heat insulating layer 41 is provided on the lower surface of the protruding second floor 16a. It is possible to reliably insulate the room on the second floor on the floor 16a from the outside.

２ 基礎立上り部
４ １階の床
４ａ 床下空間
７ 床断熱層
１３ 壁断熱層
１６ ２階の床
３０ 土間床
３１ 土間コンクリート
３３，３４ 基礎断熱層（断熱層）
４０ １階の外壁
４１ 床断熱層 2 Foundation rising part 4 1st floor 4a Underfloor space 7 Floor heat insulation layer 13 Wall heat insulation layer 16 2nd floor floor 30 Dust floor 31 Dust concrete 33, 34 Basic heat insulation layer (heat insulation layer)
40 1st floor outer wall 41 Floor insulation layer

Claims (6)

木造建物の断熱構造であって、
１階の土間床を構成する土間コンクリートの側部に断熱層が設けられており、
この断熱層が前記土間コンクリートより下方に延出していることを特徴とする木造建物の断熱構造。 A heat insulation structure of a wooden building,
A heat insulating layer is provided on the side of the soil concrete that constitutes the ground floor on the first floor,
A heat insulating structure for a wooden building, wherein the heat insulating layer extends downward from the soil concrete. 請求項１に記載の木造建物の断熱構造において、
前記土間コンクリートに隣接して当該土間コンクリートより高い基礎立上り部が設けられており、
この基礎立上り部に前記断熱層が設けられていることを特徴とする木造建物の断熱構造。 In the heat insulation structure of the wooden building of Claim 1,
A foundation rising part higher than the soil concrete is provided adjacent to the soil concrete,
A heat insulating structure for a wooden building, wherein the heat insulating layer is provided at the foundation rising portion. 請求項２に記載の木造建物の断熱構造において、
前記基礎立上り部に１階の床が設置され、この床の床下空間に面する前記基礎立上り部の外面に前記断熱層が設けられ、前記床の下面に床断熱層が設けられていることを特徴とする木造建物の断熱構造。 In the heat insulation structure of the wooden building of Claim 2,
A floor on the first floor is installed at the foundation rising portion, the heat insulating layer is provided on the outer surface of the foundation rising portion facing the underfloor space of the floor, and the floor heat insulating layer is provided on the lower surface of the floor. Characteristic heat insulation structure of wooden buildings. 請求項２または３に記載の木造建物の断熱構造において、
前記基礎立上り部に１階の外壁が設けられ、この外壁が設けられた基礎立上り部の内面に前記断熱層が設けられ、前記外壁に壁断熱層が設けられていることを特徴とする木造建物の断熱構造。 In the heat insulation structure of the wooden building of Claim 2 or 3,
A wooden building characterized in that an outer wall of the first floor is provided at the foundation rising portion, the heat insulating layer is provided on an inner surface of the foundation rising portion provided with the outer wall, and a wall heat insulating layer is provided on the outer wall. Insulation structure. 請求項４に記載の木造建物の断熱構造において、
前記１階の外壁の上端部から２階の床が突出しており、
この突出している２階の床の下面に床断熱層が設けられていることを特徴とする木造建物の断熱構造。 In the heat insulation structure of the wooden building of Claim 4,
The floor of the second floor protrudes from the upper end of the outer wall of the first floor,
A heat insulating structure for a wooden building, wherein a floor heat insulating layer is provided on the lower surface of the protruding second floor. 請求項１〜５のいずれか一項に記載の木造建物の断熱構造において、
外気に面する前記木造建物の部分に、それぞれ断熱層が設けられており、これら断熱層による前記木造建物の断熱性を示す熱損失係数（Ｑ値）が２．７W/m2K以下に設定されていることを特徴とする木造建物の断熱構造。 In the heat insulation structure of the wooden building as described in any one of Claims 1-5,
Each of the wooden buildings facing the outside air is provided with a heat insulating layer, and the heat loss coefficient (Q value) indicating the heat insulating property of the wooden building by these heat insulating layers is set to 2.7 W / m 2 K or less. Thermal insulation structure of a wooden building characterized by being made.
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