JP2010281170A - Ventilation wall structure - Google Patents

Ventilation wall structure Download PDF

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JP2010281170A
JP2010281170A JP2009137165A JP2009137165A JP2010281170A JP 2010281170 A JP2010281170 A JP 2010281170A JP 2009137165 A JP2009137165 A JP 2009137165A JP 2009137165 A JP2009137165 A JP 2009137165A JP 2010281170 A JP2010281170 A JP 2010281170A
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ventilation
projecting
wall structure
tilted
layer
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Hajime Ishiyama
石山元
Mitsuhiko Ogino
荻野光彦
Tetsuya Hayashizaki
林崎哲也
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IG Kogyo Co Ltd
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IG Kogyo Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilation wall structure having increased ventilation function, dew condensation prevention function, heat insulation function, waterproof function, and so forth. <P>SOLUTION: In this ventilation wall structure, a ventilation layer γ is formed between a substrate α and an exterior wall material A. A long air stopping edge 10 is formed of a vertical flat surface-like fixed surface 11, a projecting surface 12 projecting from the upper end of the fixed surface 11 substantially in parallel to the indoor N side, a plurality of ventilation holes 13 formed on the projecting surface 12, an upper surface 14 projecting further upward from the upper end of the fixed surface 11, a tilted surface 15 formed by making part of the fixed surface 11 or the upper surface 14 project diagonally downward on the outdoor G side, an upper piece 17 projecting upward from the front end of the tilted surface 15 and also projecting further upward from the upper end of the upper surface 14, a plurality of suction-discharge holes 18 formed at the root of the upper piece 17, a lower piece 19 having the front end of the tilted surface 15 projecting downward, a tilted decorative surface 20 having the lower end of the lower piece 19 projecting while being tilted downward on the indoor N side, and a receiving surface 21 having the front end of the tilted decorative surface 20 projecting upward. The long air stopping edge 10 is formed at the outdoor G side upper end of the ventilation layer γ. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、放湿機能、結露防止機能、断熱機能、防水機能、等を向上した通気壁構造に係るものである。   The present invention relates to a ventilation wall structure with improved moisture release function, condensation prevention function, heat insulation function, waterproof function, and the like.

壁体内が密閉状態の場合、水蒸気の逃げ場が無く、外気温度が低いと外壁材裏面や壁体内に結露が発生する。そこで、壁体内の水蒸気を外気に排出して内部結露を防止したり、土台や柱が吸収した水分を外気に排出するために、外壁材と躯体間に厚さ20mm程度の空気層(通気層)を設ける工法、所謂通気工法が開発された。本来、通気工法とは、壁内結露防止のための工法である。(例えば、特許文献1〜6参照)。   When the wall is hermetically sealed, there is no place for water vapor to escape, and condensation occurs on the back of the outer wall material or on the wall if the outside air temperature is low. Therefore, an air layer (ventilation layer) having a thickness of about 20 mm is provided between the outer wall material and the housing in order to discharge water vapor in the wall to the outside air to prevent internal dew condensation and to discharge moisture absorbed by the base and pillar to the outside air. ), A so-called ventilation method was developed. Originally, the ventilation method is a method for preventing dew condensation in the wall. (For example, refer to Patent Documents 1 to 6).

特開平09−119175号公報JP 09-119175 A 特開平09−144152号公報JP 09-144152 A 特開平11−241427号公報Japanese Patent Laid-Open No. 11-241427 特開平11−293801号公報JP 11-293801 A 特開2000−291169号公報JP 2000-291169 A 特開2003−328460号公報JP 2003-328460 A

しかしながら、特許文献1〜6は湿気を排出するが、外気が外壁材の裏面を通過するために、外壁材に断熱性のある部材を形成しても断熱材としての効果を発揮出来ず断熱材として機能しないものであるとされていた。勿論、住宅の外壁の断熱性を計算する上でも断熱性が無いものとされていた。また、通気層内を動く空気の量は、外の風によって大きく変化するものであり、特に風が強い場合には通気量が多くなり、断熱性のある外壁材を使用しても、効率の良い断熱性を発揮出来ない欠点があった。このため、風が強い場合でも通気層内の通気量を抑制することが大きな課題であった。   However, Patent Documents 1 to 6 exhaust moisture, but since the outside air passes through the back surface of the outer wall material, even if a heat insulating member is formed on the outer wall material, the effect as a heat insulating material cannot be exhibited. It was supposed not to function as. Of course, it was assumed that there was no heat insulation in calculating the heat insulation of the outer wall of the house. In addition, the amount of air that moves in the ventilation layer varies greatly depending on the outside wind. Especially when the wind is strong, the ventilation rate increases. There was a drawback that good thermal insulation could not be demonstrated. For this reason, even when the wind is strong, it has been a big problem to suppress the amount of ventilation in the ventilation layer.

本発明はこのような欠点を解決するために、下地と外壁材間に通気層を形成した通気壁構造において、垂直平面状の固定面と、固定面の上端を屋内側へ略平行に突出した突出面と、突出面に複数個形成した通気孔と、固定面の上端をさらに上方に突出した上面と、固定面あるいは上面の一部を屋外側で下方に傾斜して突出した傾斜面と、傾斜面の先端を上方に突出すると共に上面の上端よりも上方に突出した上片と、上片の根本に複数個形成した吸・排気孔と、傾斜面の先端を下方に突出した下片と、下片の下端を屋内側で下方に傾斜して突出した傾斜化粧面と、傾斜化粧面の先端を上方に突出した受け面とから形成した長尺状の通気止縁を通気層の屋外側上端に形成した通気壁構造を提供するものである。   In order to solve such drawbacks, the present invention has a ventilated wall structure in which a vent layer is formed between the base and the outer wall material, and the vertical flat fixed surface and the upper end of the fixed surface protrude substantially parallel to the indoor side. A projecting surface, a plurality of air holes formed on the projecting surface, an upper surface projecting upward from the upper end of the fixed surface, and an inclined surface projecting by tilting the fixed surface or part of the upper surface downward on the outdoor side, An upper piece that protrudes upward from the top end of the inclined surface and protrudes above the upper end of the upper surface, a plurality of intake / exhaust holes formed at the base of the upper piece, and a lower piece that protrudes downward from the tip of the inclined surface A long ventilation stop formed from an inclined decorative surface that protrudes with the lower end of the lower piece inclined downward on the indoor side, and a receiving surface that protrudes upward at the tip of the inclined decorative surface, on the outdoor side of the ventilation layer A vent wall structure formed at the upper end is provided.

本発明に係る通気壁構造によれば、通気止縁を通気層の屋外側上端に形成したために、(1)通気層の外側に位置する外壁材が断熱材として機能する。(2)外壁材の断熱性により、通気層、外壁材の裏面および壁内の温度が高く保持され、より内部結露の発生が抑えられる。(3)通気止縁の形成により、風が強い場合でも通気層内に強風が吹き込むことを抑制し、通気層内の通気量を一定に保つことが出来る。等の特徴、効果がある。   According to the vent wall structure of the present invention, since the vent stop edge is formed at the upper end on the outdoor side of the vent layer, (1) the outer wall material positioned outside the vent layer functions as a heat insulating material. (2) Due to the heat insulation of the outer wall material, the temperature of the ventilation layer, the back surface of the outer wall material, and the wall is kept high, and the occurrence of internal condensation is further suppressed. (3) By forming the ventilation stop edge, even when the wind is strong, the strong air can be prevented from being blown into the ventilation layer, and the amount of ventilation in the ventilation layer can be kept constant. There are features and effects.

本発明に係る通気壁構造の代表的一例を示す説明図である。It is explanatory drawing which shows a typical example of the ventilation wall structure which concerns on this invention. 本発明に係る通気壁構造の代表的一例を示す説明図である。It is explanatory drawing which shows a typical example of the ventilation wall structure which concerns on this invention. 本発明に係る通気壁構造の代表的一例を示す説明図である。It is explanatory drawing which shows a typical example of the ventilation wall structure which concerns on this invention. 本発明に係る通気壁構造の代表的一例を示す説明図である。It is explanatory drawing which shows a typical example of the ventilation wall structure which concerns on this invention. 本発明に係る通気壁構造の代表的一例を示す説明図である。It is explanatory drawing which shows a typical example of the ventilation wall structure which concerns on this invention. 本発明に係る通気壁構造に使用する通気止縁の一例を示す説明図である。It is explanatory drawing which shows an example of the ventilation stop edge used for the ventilation wall structure which concerns on this invention. 本発明に係る通気壁構造に使用する通気止縁の一例を示す説明図である。It is explanatory drawing which shows an example of the ventilation stop edge used for the ventilation wall structure which concerns on this invention. 本発明に係る通気壁構造に使用する外壁材の代表的一例を示す説明図である。It is explanatory drawing which shows a typical example of the outer wall material used for the ventilation wall structure which concerns on this invention. 本発明に係る通気壁構造に使用する通気止縁のその他の実施例を示す説明図である。It is explanatory drawing which shows the other Example of the ventilation stop edge used for the ventilation wall structure which concerns on this invention. 本発明に係る通気壁構造のその他の実施例を示す説明図である。It is explanatory drawing which shows the other Example of the ventilation wall structure which concerns on this invention. 本発明に係る通気壁構造のその他の実施例を示す説明図である。It is explanatory drawing which shows the other Example of the ventilation wall structure which concerns on this invention.

以下に図面を用いて本発明に係る通気壁構造について詳細に説明する。図1〜図5は本発明に係る通気壁構造を示す断面図、図6(a)、(b)、図7(a)〜(c)は本発明に係る通気壁構造に使用する通気止縁10を示す説明図、図8(a)〜(d)は外壁材Aを示す説明図である。図中、αは下地、βは釘等の固定具、γは通気層を示している。   The ventilation wall structure according to the present invention will be described in detail below with reference to the drawings. 1 to 5 are sectional views showing a ventilation wall structure according to the present invention, and FIGS. 6A, 6B and 7A to 7C are ventilation stoppers used in the ventilation wall structure according to the present invention. FIGS. 8A to 8D are explanatory views showing the outer wall material A. FIG. In the figure, α indicates a base, β indicates a fixture such as a nail, and γ indicates a ventilation layer.

下地αは、内装材1、ポリエチレンシート等の防湿層2、主柱、間柱等の躯体3、躯体3間に形成したグラスウール等の断熱材4より形成したものである。 The base α is formed from the interior material 1, a moisture-proof layer 2 such as a polyethylene sheet, a housing 3 such as a main pillar and a stud, and a heat insulating material 4 such as glass wool formed between the housings 3.

5は防風透湿層(二点鎖線で示す)であり、透湿防水シート(風・雨を通さず湿気だけを通す不織布)、あるいは透湿防水板(透湿性の高いシージングボード、シージングインシュレーションボード、等)あるいは合板やOSB等よりなり、透湿性、防風性、防水性、等を有する部材より形成したものである。   5 is a wind-proof moisture-permeable layer (indicated by a two-dot chain line), a moisture-permeable waterproof sheet (nonwoven fabric that passes only moisture without passing through wind and rain), or a moisture-permeable waterproof board (a highly moisture-permeable sizing board, sizing insulation) Board, etc.) or plywood, OSB, etc., and formed from a member having moisture permeability, windproof property, waterproof property, and the like.

6は通気層形成部材であり、通気層γが上下開口部と連通するように形成したものであり、例えば一定間隔で縦に形成した縦胴縁である。また、通気層γが後記する開口部(上開口7、下開口8、小屋裏通気開口9)と連通するように形成されれば一定間隔で横に形成した横胴縁でも良いものである。勿論、通気層形成部材6の替わりに、通気層γ(溝)を形成した板材を部分的あるいは全面に形成してもかまわない。通気層形成部材6の材質は、木材、金属材、プラスチック材、等である。   Reference numeral 6 denotes a ventilation layer forming member, which is formed so that the ventilation layer γ communicates with the upper and lower openings, and is, for example, a vertical trunk edge formed vertically at a constant interval. Further, if the ventilation layer γ is formed so as to communicate with the openings described later (upper opening 7, lower opening 8, shed back ventilation opening 9), a horizontal trunk edge formed horizontally at a constant interval may be used. Of course, instead of the ventilation layer forming member 6, a plate material on which the ventilation layer γ (groove) is formed may be formed partially or entirely. The material of the ventilation layer forming member 6 is wood, metal material, plastic material, or the like.

7は上開口、8は下開口、9は小屋裏通気開口であり、通気層形成部材6により形成された通気層γと連通し、屋内Nから通気層γに放出された室内Nから出た湿気を屋外Gに排出するための出口である。勿論、上開口7、下開口8、小屋裏通気開口9は湿気を排出するために取り入れる空気の流入口としても機能するものである。   7 is an upper opening, 8 is a lower opening, and 9 is a ventilating opening at the back of the hut, which communicates with the ventilation layer γ formed by the ventilation layer forming member 6 and exits from the room N released from the indoor N to the ventilation layer γ. It is an outlet for discharging moisture to the outdoor G. Of course, the upper opening 7, the lower opening 8, and the attic ventilation opening 9 also function as an inflow port for air taken in to discharge moisture.

上開口7は、外壁材Aの桁部分と軒天23間に、通気層γと連通するように形成したものであり、図では通気止縁10により通気層γと連通した上開口7を形成したものである。   The upper opening 7 is formed between the spar portion of the outer wall material A and the eaves ceiling 23 so as to communicate with the ventilation layer γ. In the figure, the upper opening 7 communicating with the ventilation layer γ is formed by the ventilation stop edge 10. It is a thing.

下開口8は外壁材Aと土台部D間に形成するものであり、水切り22により、通気層γと連通した下開口8を形成したものである。   The lower opening 8 is formed between the outer wall material A and the base part D, and the lower opening 8 communicating with the ventilation layer γ is formed by the drainer 22.

小屋裏通気開口9は、屋内Nに発生した湿気を通気層γを介して小屋裏Kから屋外Gへ排出するために形成したものである。 The cabin back ventilation opening 9 is formed in order to discharge moisture generated in the indoor N from the cabin back K to the outdoor G through the ventilation layer γ.

通気止縁10は図6(a)、(b)、図7(a)〜(c)に示すように、垂直平面状の固定面11と、固定面11の上端を屋内側へ略平行に突出した突出面12と、突出面12に一定ピッチで複数個形成した通気孔13と、固定面11の上端をさらに上方に突出した上面14と、固定面11の上端を屋外側で下方に傾斜して突出した傾斜面15と、傾斜面15の先端を上方に突出すると共に上面14の上端よりも上方に突出した上片17と、上片17の根本に一定ピッチで複数個形成した吸・排気孔18と、傾斜面15の先端を下方に突出した下片19と、上片17と下片19とから形成した化粧面16と、化粧面16の下端を屋内側で下方に傾斜して突出した傾斜化粧面20と、傾斜化粧面20の先端を上方に突出した受け面21と、上面14先端と上片17先端間の空間Hから吸・排気路14aを形成した長尺状部材である。その素材としては金属材、あるいはプラスチック材、等よりなるものである。   As shown in FIGS. 6 (a), 6 (b) and 7 (a) to 7 (c), the ventilation stop edge 10 has a vertical flat fixed surface 11 and the upper end of the fixed surface 11 substantially parallel to the indoor side. A protruding projection surface 12, a plurality of vent holes 13 formed at a fixed pitch on the protruding surface 12, an upper surface 14 protruding further upward from the upper end of the fixing surface 11, and an upper end of the fixing surface 11 inclined downward on the outdoor side And the upper surface 17 projecting upward from the upper end of the upper surface 14 and a plurality of suction / absorption formed at a fixed pitch at the base of the upper surface 17. The exhaust hole 18, the lower piece 19 projecting downward from the tip of the inclined surface 15, the decorative surface 16 formed from the upper piece 17 and the lower piece 19, and the lower end of the decorative surface 16 inclined downward on the indoor side The protruding inclined decorative surface 20, the receiving surface 21 protruding upward from the tip of the inclined decorative surface 20, and the upper surface 4 is an elongated member formed with intake and exhaust passage 14a from the space H between the tip and the upper piece 17 tip. The material is made of a metal material or a plastic material.

固定面11は通気止縁10を下地α上に固定するための部分である。   The fixing surface 11 is a part for fixing the ventilation stopper 10 on the base α.

突出面12は通気孔13を形成するための部分であり、通気孔13の形成ピッチ、大きさを変化させることにより、通気路γ内の通気量を調整出来るようにしたものである。突出面12の突出幅は、通気層形成部材6の厚さTとほぼ同じ厚さである。また、突出面12は通気層形成部材6が邪魔になってしまうために、図7(c)に示すように通気層形成部材6の形成ピッチと同じ間隔Pで、かつ通気層形成部材6の幅と同じ幅Wで切り欠いて形成するものである。   The projecting surface 12 is a part for forming the air holes 13, and the air flow rate in the air passage γ can be adjusted by changing the formation pitch and size of the air holes 13. The protruding width of the protruding surface 12 is substantially the same as the thickness T of the ventilation layer forming member 6. In addition, since the ventilation layer forming member 6 is in the way of the protruding surface 12, as shown in FIG. 7C, the projecting surface 12 has the same interval P as the formation pitch of the ventilation layer forming member 6 and the ventilation layer forming member 6. It is formed by cutting out with the same width W as the width.

通気孔13は、突出面12に一定ピッチで複数個形成し、屋内Nから通気層γに放出された室内Nから出た湿気を屋外Gに排出するためのものである。   A plurality of ventilation holes 13 are formed on the projecting surface 12 at a constant pitch, and are used for discharging moisture from the room N released from the indoor N to the ventilation layer γ to the outdoor G.

上面14は、上片17先端間の空間Hから吸・排気路14aを形成するものであり、外気を取り入れる吸気路、内部の汚れた空気、湿った空気を排出する排気路として機能するものである。   The upper surface 14 forms an intake / exhaust passage 14a from the space H between the tips of the upper pieces 17, and functions as an intake passage for taking in outside air, an exhaust passage for exhausting dirty air and moist air inside. is there.

傾斜面15は万が一風雨が吸・排気孔18から内部に浸入した際に、その傾斜により吸・排気孔18から屋外Gに排水出来るように形成したものである。   The inclined surface 15 is formed so as to be able to drain from the intake / exhaust hole 18 to the outdoor G by the inclination when the rain and rain enters the inside through the intake / exhaust hole 18.

上片17は化粧面として機能すると共に、先端を軒天23に当接する施工面として機能すると共に、空間Hを形成する部分でもある。   The upper piece 17 functions as a decorative surface, functions as a construction surface whose tip abuts against the eaves 23, and also forms a space H.

吸・排気孔18は傾斜面15の下端の上片17の下端部分に一定間隔で複数個形成し、外気を取り入れる吸気路、内部の汚れた空気、湿った空気を排出する排気口として機能するものである。   A plurality of intake / exhaust holes 18 are formed at regular intervals at the lower end portion of the upper piece 17 at the lower end of the inclined surface 15 and function as an intake passage for taking in outside air, an exhaust port for exhausting dirty air inside and moist air. Is.

下片19と傾斜化粧面20は化粧面として機能すると共に、外壁材Aの上端の木口(切り口面)をカバーし、風雨から外装材Aを守ると共に、美観性を向上するために形成したものでる。また、受け面21は外装材Aと面接触し一体化を強化するための部分である。   The lower piece 19 and the inclined decorative surface 20 function as a decorative surface, cover the upper end of the outer wall material A (cut surface), protect the exterior material A from wind and rain, and are formed to improve aesthetics Out. Further, the receiving surface 21 is a portion for bringing the exterior material A into surface contact and strengthening the integration.

また、吸・排気孔18の開口面積と、突出面12に形成した通気孔13の開口面積を比べた場合に、吸・排気孔18の開口面積>通気孔13の開口面積となるように形成するものである。勿論、吸・排気路14aの開口面積>通気孔13の開口面積、吸・排気路14aの開口面積>吸・排気孔18の開口面積である。   Further, when the opening area of the suction / exhaust hole 18 and the opening area of the vent hole 13 formed in the projecting surface 12 are compared, the opening area of the intake / exhaust hole 18 is larger than the opening area of the vent hole 13. To do. Of course, the opening area of the suction / exhaust passage 14a> the opening area of the vent hole 13, the opening area of the suction / exhaust passage 14a> the opening area of the suction / exhaust hole 18.

このように形成することにより、小屋裏Kから流れてきた空気は、通気路γ方向ではなく通気止縁10の方向に流れ、通気路γ内へ流れる量を抑制出来るものである。   By forming in this way, the air flowing from the back of the hut K flows not in the direction of the ventilation path γ but in the direction of the ventilation stop edge 10 and the amount flowing into the ventilation path γ can be suppressed.

Aは断熱性を有する外壁材(以下、単に外壁材という)であり、その他機能として防火性、防水性、気密性、耐候性、等の機能を有する部材である。例えば、図8(a)〜(d)に示すような金属製サイディング材等を使用するものである。特に、金属製サイディング材よりなる外壁材Aは、金属製表面材A1をロール成形した板材と、裏面材A2間に合成樹脂発泡体(プラスチックフォーム)等の芯材A3をサンドイッチした特に断熱性を有する外壁材Aである。   A is an outer wall material having heat insulation (hereinafter simply referred to as an outer wall material), and is a member having functions such as fire resistance, waterproofness, airtightness, and weather resistance as other functions. For example, a metal siding material as shown in FIGS. 8A to 8D is used. In particular, the outer wall material A made of a metal siding material has a particularly heat insulating property in which a core material A3 such as a synthetic resin foam (plastic foam) is sandwiched between a plate material obtained by roll-forming a metal surface material A1 and a back surface material A2. It is the outer wall material A which has.

さらに、図2(a)、(b)を用いて本発明に係る通気壁構造の作用について説明する。つまり、図2(a)に示すように、空気が屋外Gから小屋裏Kへ流入する時は、小屋裏Kが負圧、軒天23付近が正圧、土台部が正圧となり、外気は主として抵抗の少ない軒天23部分の通気止縁10から吸われ、抵抗の多い土台部D方向(通気層γ)からはあまり吸われないために通気層γの温度が変化せず、外壁材Aの断熱性が発揮される。通常はこの状態である。 Furthermore, the effect | action of the ventilation wall structure which concerns on this invention is demonstrated using FIG. 2 (a), (b). That is, as shown in FIG. 2 (a), when the air flows from the outdoor G into the hut K, the hut K has a negative pressure, the eaves 23 vicinity has a positive pressure, and the base portion has a positive pressure. It is sucked mainly from the air vent edge 10 of the eave heaven 23 portion having a low resistance and is not so much sucked from the base portion D direction (the air flow layer γ) having a high resistance. The heat insulating property is exhibited. Usually this is the state.

また、希に図2(b)に示すように、空気が小屋裏Kから通気止縁10から屋外Gへ流出する時は壁面に対して平行に風が吹くような場合、あるいはその壁面が風下になる場合であり、小屋裏Kよりも、軒天23付近および地面近くの土台部の方が気圧が低くなり、空気は小屋裏Kから通気止縁10を経て屋外Gに流れ、土台部D方向(通気層γ)から屋外Gに流れる量が抑制され、通気層γの温度が変化せず、外壁材Aの断熱性が発揮されるものである。 In addition, as shown in FIG. 2 (b), when the air flows out from the back of the hut K to the outdoor G from the back of the cabin K, the wind blows in parallel to the wall surface, or the wall surface is leeward. The air pressure at the base near the eaves 23 and near the ground is lower than the back of the hut K, and the air flows from the back of the hut K to the outdoor G through the ventilation stop 10, and the base D The amount flowing from the direction (ventilation layer γ) to the outdoor G is suppressed, the temperature of the vent layer γ does not change, and the heat insulation of the outer wall material A is exhibited.

このように、小屋裏Kへの空気の流入・流出が、通気路γへ影響せず、通気層γ内を流れる空気の量を自然対流程度に抑制出来るために、通気層γが断熱層として機能し、外壁材Aの断熱性も発揮されるものである。なお、屋内Nから発生し通気層γへ流入した湿気は、通気層γの自然対流により、屋外Gへの空気の流出、屋内Nへの空気の流入に関係なく屋外Gへ常時排出されるものである。   In this way, the inflow and outflow of air into the shed K does not affect the air passage γ, and the amount of air flowing in the air passage γ can be suppressed to the level of natural convection. It functions and the heat insulation of the outer wall material A is also exhibited. The moisture generated from the indoor N and flowing into the ventilation layer γ is always discharged to the outdoor G regardless of the outflow of air to the outdoor G and the inflow of air to the indoor N by natural convection of the ventilation layer γ. It is.

次に、図1〜図8を用いて本発明に係る通気壁構造の施工方法について説明する。まず、内装材1、ポリエチレンシート等の防湿層2、主柱、間柱等の躯体3、躯体3間に形成したグラスウール等の断熱材4より形成した下地α上に、防風透湿層5(透湿防水シート)を形成する。   Next, the construction method of the ventilation wall structure according to the present invention will be described with reference to FIGS. First, a wind- and moisture-permeable layer 5 (permeating layer) is formed on an interior material 1, a moisture-proof layer 2 such as a polyethylene sheet, a frame 3 such as a main pillar and an inter-column, and a base α formed of a heat insulating material 4 such as glass wool formed between the frames 3. A wet waterproof sheet).

その後、厚さ18mm×幅45mm程度の通気層形成部材6を455mmピッチで縦に複数本固定する。この時、通気層形成部材6は軒天23形成部分よりも内側に突出するように形成すると共に、下端部分は土台部Dから、固定片12の高さ分だけ隙間を形成して施工する。   Thereafter, a plurality of ventilation layer forming members 6 having a thickness of about 18 mm and a width of about 45 mm are fixed vertically at a pitch of 455 mm. At this time, the air-permeable layer forming member 6 is formed so as to protrude inward from the eaves-top 23 forming portion, and the lower end portion is constructed by forming a gap from the base portion D by the height of the fixed piece 12.

通気層形成部材6の形成が完了したら、軒天23を形成し、その後上開口7、下開口8が形成されるように、通気層形成部材6上に通気止縁10、通気層形成部材6の下端に水切り22を固定する。 When the formation of the ventilation layer forming member 6 is completed, the eaves top 23 is formed, and then the ventilation stopper 10 and the ventilation layer forming member 6 are formed on the ventilation layer forming member 6 so that the upper opening 7 and the lower opening 8 are formed. A drainer 22 is fixed to the lower end of the.

その後、通気層形成部材6上に図8(a)に示すような外壁材Aを各種役物を使用して施工し、施工を完了するものである。   Thereafter, the outer wall material A as shown in FIG. 8A is constructed on the ventilation layer forming member 6 by using various kinds of accessories, and the construction is completed.

以上説明したのは本発明に係る通気壁構造の一実施例にすぎず、図9(a)〜(c)〜図11に示すように形成することも出来る。   The above description is only one embodiment of the vent wall structure according to the present invention, and it can be formed as shown in FIGS. 9 (a) to (c) to FIG.

図9(a)〜(c)は通気止縁10のその他の実施例を示す説明図である。   FIGS. 9A to 9C are explanatory views showing other examples of the ventilation stop edge 10.

図10は、通気層形成部材6上に防水層24(点線で示す)を形成し、通気層γ内に雨水等が浸入しないように形成したものである。例えば、アスファルトフェルト等の防水シートである。   In FIG. 10, a waterproof layer 24 (indicated by a dotted line) is formed on the ventilation layer forming member 6 so that rainwater or the like does not enter the ventilation layer γ. For example, a waterproof sheet such as asphalt felt.

図11は図1の軒天23部分に形成した上開口7を削除した通気壁構造であり、小屋裏Kと屋外G間の通気は主に軒天23に形成した軒天通気口25により行うように形成した通気壁構造である。   FIG. 11 shows a ventilation wall structure in which the upper opening 7 formed in the eave ceiling 23 of FIG. 1 is deleted, and ventilation between the cabin back K and the outdoor G is performed mainly by the eave ceiling vent 25 formed in the eave ceiling 23. A ventilation wall structure formed as described above.

本発明に係る通気壁構造によれば、外壁材Aの裏面に通気層γを形成した通気壁構造では、外壁材Aとして断熱性の有る部材を形成しても外壁材Aが断熱材として認められなかったが、通気層γ内を空気が微量にしか移動しないように小屋裏通気開口・上開口・下開口の3カ所の開口を壁体に形成することにより、通気層γの本来の意義である内部結露防止の効果を生かし、さらに、断熱性のある外壁材Aの断熱効果を生むことで、外壁材A裏面および壁内の温度を高く保つことが可能となり、省エネルギーと壁内結露の防止効果を高めることが出来る構造となる。これは、今までの通気構造のように、外壁材Aの裏面と下地間の通気路を外気が移動することにより結露を防止する構造とは異なり、外気の移動を極力抑えた状態で湿気だけを外部に排出出来る構造であるために、断熱性を有する外壁材Aの性能を有効に活用出来るものである。   According to the ventilation wall structure according to the present invention, in the ventilation wall structure in which the ventilation layer γ is formed on the back surface of the outer wall material A, the outer wall material A is recognized as the heat insulating material even if a heat-insulating member is formed as the outer wall material A. Although it was not possible, the original significance of the ventilation layer γ was created by forming three openings in the wall, the ventilation opening at the back of the hut, the upper opening, and the lower opening so that only a small amount of air could move in the ventilation layer γ. By taking advantage of the effect of preventing internal condensation, and further by producing the heat insulation effect of the heat insulating outer wall material A, it becomes possible to keep the temperature of the back surface of the outer wall material A and the inside of the wall high. The structure can enhance the prevention effect. This is different from the structure that prevents the dew condensation by moving the outside air through the ventilation path between the back surface of the outer wall material A and the base as in the conventional ventilation structure. Therefore, the performance of the outer wall material A having heat insulation can be effectively utilized.

α 下地
β 固定具
γ 通気層
A 断熱性を有する外壁材
A1 金属製表面材
A2 裏面材
A3 芯材
D 土台部
G 屋外
K 小屋裏
N 屋内
1 内装材
2 防湿層
3 躯体
4 断熱材
5 防風透湿層
6 通気層形成部材
7 上開口
8 下開口
9 小屋裏通気開口
10 通気止縁
11 固定面
12 突出面
13 通気孔
14 上面
14a 吸・排気路
15 傾斜面
16 化粧面
17 上片
18 吸・排気孔
19 下片
20 傾斜化粧面
21 受け面
22 水切り
23 軒天
24 防水層
25 軒天通気口
α Base β Fixture γ Ventilation layer A Outer wall material A1 with heat insulation A1 Metal surface material A2 Back material A3 Core material D Base G Outdoor K Hut back N Indoor 1 Interior material 2 Moisture-proof layer 3 Housing 4 Heat insulation material 5 Windproof permeability Wet layer 6 Ventilation layer forming member 7 Upper opening 8 Lower opening 9 Hut back ventilation opening 10 Vent stop 11 Fixing surface 12 Protruding surface 13 Venting hole 14 Upper surface 14a Suction / exhaust passage 15 Inclined surface 16 Decorative surface 17 Upper piece 18 Exhaust hole 19 Lower piece 20 Inclined decorative surface 21 Receiving surface 22 Drainer 23 Eave top 24 Waterproof layer 25 Eve vent

Claims (1)

下地と外壁材間に通気層を形成した通気壁構造において、垂直平面状の固定面と、固定面の上端を屋内側へ略平行に突出した突出面と、突出面に複数個形成した通気孔と、固定面の上端をさらに上方に突出した上面と、固定面あるいは上面の一部を屋外側で下方に傾斜して突出した傾斜面と、傾斜面の先端を上方に突出すると共に上面の上端よりも上方に突出した上片と、上片の根本に複数個形成した吸・排気孔と、傾斜面の先端を下方に突出した下片と、下片の下端を屋内側で下方に傾斜して突出した傾斜化粧面と、傾斜化粧面の先端を上方に突出した受け面とから形成した長尺状の通気止縁を通気層の屋外側上端に形成したことを特徴とする通気壁構造。 In a ventilation wall structure in which a ventilation layer is formed between the base and the outer wall material, a vertical flat fixed surface, a protruding surface that protrudes substantially parallel to the indoor side at the upper end of the fixed surface, and a plurality of ventilation holes formed in the protruding surface And an upper surface that protrudes further upward from the upper end of the fixed surface, an inclined surface that protrudes with the fixed surface or part of the upper surface inclined downward on the outdoor side, and an upper end that protrudes upward from the tip of the inclined surface An upper piece protruding upward, a plurality of intake / exhaust holes formed at the base of the upper piece, a lower piece protruding downward at the tip of the inclined surface, and a lower end of the lower piece inclined downward on the indoor side. A ventilating wall structure characterized in that a long vent edge formed from an inclined decorative surface projecting and a receiving surface projecting upward from the tip of the inclined decorative surface is formed at the upper end on the outdoor side of the vent layer.
JP2009137165A 2009-06-08 2009-06-08 Ventilation wall structure Pending JP2010281170A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019173459A (en) * 2018-03-29 2019-10-10 倉敷紡績株式会社 Garret ventilation structure, and ventilation member

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019173459A (en) * 2018-03-29 2019-10-10 倉敷紡績株式会社 Garret ventilation structure, and ventilation member
JP7000228B2 (en) 2018-03-29 2022-01-19 倉敷紡績株式会社 Attic ventilation structure and ventilation members

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