JP3960422B2

JP3960422B2 - Outside insulation wall structure and outside insulation wall construction method

Info

Publication number: JP3960422B2
Application number: JP2002253161A
Authority: JP
Inventors: 美佐雄岡本; 賢盛本; 冬紀玉川
Original assignee: Sekisui House Ltd
Current assignee: Sekisui House Ltd
Priority date: 2002-08-30
Filing date: 2002-08-30
Publication date: 2007-08-15
Anticipated expiration: 2022-08-30
Also published as: JP2004092125A

Description

【０００１】
【発明の属する技術分野】
本発明は、特に木造系や鉄骨系の建物において構造体の屋外側に断熱・気密ラインを形成する外断熱方式の壁構造及び壁工法に関する。
【０００２】
【従来の技術】
資源・エネルギーの有効活用や建物の長寿命化の観点から、近年では、建物の気密性や断熱性を向上させる研究が積極的に重ねられている。かかる高気密・高断熱型の建築工法は、一般に、構造体の屋内側に断熱材と気密材（気密フィルム等）からなる断熱・気密ラインを設ける内断熱工法と、構造体の屋外側に断熱・気密ラインを設ける外断熱工法とに大別される。わが国では従来、内断熱工法が主流をなしてきたが、断熱材のつなぎ目やコンセント周りなどに断熱・気密ラインの隙間（不連続部）ができ、壁面や壁の内部に結露が生じやすくなって、カビやダニが発生し、建物が劣化しやすくなるという問題が指摘されていた。
【０００３】
これに対して外断熱工法は、内断熱工法に比べて断熱・気密ラインの連続性を確保しやすい。構造体は断熱材の屋内側に位置しているので、外気の温湿度変化の影響を受けにくく、内部結露が生じにくくなって、建物の耐久性が向上するという長所を有している。
【０００４】
かかる外断熱工法を木造軸組建物に適用する場合、従来、一般的には、図８に示すように、躯体の柱９１，９２や梁の屋外側に断熱材９３を釘９４やビスで取り付けている。断熱材９３同士の継ぎ目は合决りとし、目地部分や他部材との取り合い部分には気密テープ９５を貼着したり、発泡ウレタン等を現場で充填するなどして、断熱・気密ラインを連続させる。続いて、断熱材９３の屋外側に透湿性防水シート９６を貼着し、柱９１，９２や梁に対して胴縁９７等を釘９４やビスで取り付け、この胴縁９７等に外壁仕上材９８を取り付けている。
【０００５】
【発明が解決しようとする課題】
前記従来の工法は、構造体に対して、屋外側から、断熱材９３を隙間なく繋ぎ合わせつつ取り付け、さらに透湿性防水シート９６や胴縁９７、外壁仕上材９８等を順次取り付けるとういう工程で行われるので、現場で取り扱う部材が多く、施工上の煩雑さや困難さを伴う。そのため、施工者の技量次第で施工精度が低下して断熱性能がばらつく可能性が大きい。特に、断熱材９３同士の継ぎ目や他部材との取り合い部分においては、気密テープ９５の皺や発泡ウレタンの充填不良によって断熱・気密ラインの欠損が生じやすい。また、経年による断熱材９３の収縮や気密テープ９５の剥離も生じる。このような断熱・気密ラインの欠損は、漏湿気による結露を招いて建物の劣化を促進することになる。
【０００６】
また、断熱材９３や胴縁９７等を柱９１，９２や梁に対して取り付けるときに、数十mm以上の厚さを有する断熱材９３を貫通して釘９４やビスを打つことになる。このとき、作業する側からは柱９１，９２や梁が見えないので、釘９４やビスが柱９１，９２や梁から外れてしまう場合がある。すると、外れて貫通した釘９４等が冷橋となり、屋内側に露出した釘９４等の表面に屋内側の湿気が結露して、カビの発生や金属部の発錆を招くことになる。
【０００７】
さらに、前記従来のような工法では、増改築等に際して外壁の取外しを行う場合、釘９４等を抜き取るときに断熱材９３が壊れやすいので、廃材の分別回収やリサイクルの面でも問題がある。
【０００８】
そこで本発明は、現場での施工が容易で、断熱・気密ラインの連続性を確保しやすく、長期的にも建物の劣化を生じにくい外断熱方式の壁構造及び壁工法を提供することを解決課題とする。
【０００９】
【課題を解決するための手段】
前記課題を解決するため、本発明の外断熱壁構造は、柱、梁、胴縁その他の軸組部材と、該軸組部材の屋外側表面に建て込まれる壁断熱パネルと、該壁断熱パネルの屋外側に取り付けられる外壁パネルとかならる外断熱壁構造において、
（ａ）軸組部材の屋外側表面に気密テープが貼着され、
（ｂ）壁断熱パネルは、木質材からなる枠材と、前記枠材で囲まれた枠内に充填された断熱材と、前記枠材及び断熱材の屋内側全面に貼着された気密フィルムとを備えるとともに、前記枠材のうち縦辺に位置する縦枠材は、屋内側縁部に外方への張出縁を備えた略Ｌ字形の断面形状を有し、この前記壁断熱パネルが、前記軸組部材の屋外側に密着状態で建て込まれ、
（ｃ）前記壁断熱パネル同士が左右方向に突き合わされる縦目地部分には、基部と、基部に固着された基板と、締付ビス及びコイルスプリングを介して基板上に回動可能に取り付けられた２枚の押え板を備えてなる壁断熱パネル取付金具が、前記基部を前記縦目地部分に挟み込まれた状態で軸組部材に対し固定されるととともに、前記押え板により壁断熱パネルの縦枠材の張出縁が軸組部材側に押圧されて、壁断熱パネルが軸組部材に対し固定され、
（ｄ）前記縦目地部分に形成された溝部に断熱充填材が充填され、
（ｅ）前記縦目地部分を挟んで対をなす壁断熱パネルの両縦枠材の屋外側見付面には、基板と、締付ビス及びコイルスプリングを介して基板上に回動可能に取り付けられた２枚の押え板を備えてなる外壁パネル取付金具が、前記壁断熱パネル取付金具とは前記断熱充填材を介し熱的に分断された状態で取り付けられ、
（ｆ）前記外壁パネル取付金具を介して壁断熱パネルの屋外側に外壁パネルが取り付けられたことを特徴とする。
【００１３】
また、本発明の外断熱壁工法は、
（ア）柱、梁、胴縁その他の軸組部材の屋外側表面に気密テープを貼着し、
（イ）次いで、木質材からなる枠材の内側に予め断熱材を充填して屋内側全面に気密フィルムを貼着してなる壁断熱パネルを、前記軸組部材の屋外側に密着させて建て込み、
（ウ）次いで、前記壁断熱パネルの目地部分に配した壁断熱パネル取付金具によって、各壁断熱パネルを前記軸組部材に固定し、
（エ）次いで、前記壁断熱パネルの目地部分に断熱充填材を充填し、
（オ）次いで、前記壁断熱パネルの目地部分に、前記壁断熱パネル取付金具とは前記断熱充填材を介し熱的に分断された状態で外壁パネル取付金具を取り付け、
（カ）前記外壁パネル取付金具を介して壁断熱パネルの屋外側に外壁パネルを取り付けることを特徴とする。
【００１５】
【発明の実施の形態】
以下、本発明の実施の形態について、図面を参照しつつ説明する。
【００１６】
図１は、本発明の外断熱壁構造及び壁工法に使用される壁断熱パネルの基本的な構成を示す分解斜視図である。また、図２〜図３は、本発明の外断熱壁構造及び壁工法の基本的構成を示す部分斜視図であり、図４は、図２〜図３に示した外断熱壁構造における壁断熱パネルの縦目地部分の詳細を示す部分断面図である。
【００１７】
壁断熱パネル１は、四周を構成する枠材１１と、それらの枠材１１で囲まれた枠内に充填された断熱材１２と、枠材１１及び断熱材１２の裏面（屋内側）全面に貼着された気密フィルム１３とを備えている。この壁断熱パネル１が、図２に示すように、建物の柱、間柱、梁、胴縁等からなる軸組部材２の屋外側に複数枚、隣接して建て込まれることにより、軸組部材２の屋外側に気密・断熱ラインが形成される。
【００１８】
例示の形態にかかる壁断熱パネル１の枠材１１は、見込み寸法が約100mm 程度の木質材で、その縦辺に位置する縦枠材１１ａは、図４に示すように、屋内側縁部部に外方への張出縁１１１を備えた略Ｌ字形の断面形状に形成されている。また、上辺に位置する上枠材１１ｂは略台形状の断面形状を有し、その上面が、母屋材等からなる屋根架構３の上面と面一に揃うように形成されている。
【００１９】
断熱材１２は、例えば硬質ウレタン等の発泡樹脂や、グラスウールその他の一般的な断熱材料を利用して形成される。断熱材１２の厚さは、この例では約75mmであるが、枠材１１の見込み寸法内に納まる範囲で、所要の断熱性能に合わせて任意に設定される。また、気密フィルム１３には、例えば0.1mm 程度の厚さのポリプロピレンフィルム等が使用される。
【００２０】
例示した建物は、柱、桁、間柱、胴縁等の軸組部材２が軽量鉄骨材からなるものである。本発明の外断熱壁構造及び壁工法では、壁断熱パネル１の建て込みに先立って、軸組部材２の屋外側表面に気密テープ４が貼着される。この気密テープ４は、例えば発泡ポリエチレンや発泡ウレタン、発泡ポリスチレンなどの発泡樹脂、あるいは発泡ＥＰＤＭ（エチレン・プロピレン・ジエン３元共重合体）などの合成ゴムからなるもので、厚さが少なくとも２mm以上、好ましくは３mm程度の帯状体に形成されている。かかる発泡体としては気泡が個々に独立したもの（独立発泡体）が好ましいが、連続気泡を有する材料（連続発泡体）の少なくとも一面に気密性のフェイス層を設けたものも利用可能である。この気密テープ４を軸組部材２の表面に貼着して壁断熱パネル１を密着させることにより、軸組部材２の表面や壁断熱パネル１の裏面（屋内側表面）に現れる微小な不陸が吸収されて、精度の高い断熱・気密ラインが形成されることになる。
【００２１】
断熱壁パネルを軸組部材２に取り付けるに際しては、例えば図５に示すような壁断熱パネル取付金具５が使用される。例示の壁断熱パネル取付金具５は、２本のリップ付溝形鋼を背中合せにして構成された間柱２１に取り付けられる形態を有している。
【００２２】
この壁断熱パネル取付金具５は、上面に開口溝を有する略矩形断面の基部５１に基板５２が固着され、この基板５２の上に、締付ビス５３及びコイルスプリング５４を介して、２枚の押え板５５，５５が回動自在に取り付けられた構成を備えている。締付ビス５３の頭部は指先で回すことができるようにローレット状に加工されるとともに、頭部の頂面にはレンチ締結用の六角孔が形成されている。また、締付ビス５３の脚部は基板５２に形成された雌ネジ孔に螺合されている。各押え板５５は、コイルスプリング５４の弾発力によって締付ビス５３の頭部側に保持され、基部５１の軸線に沿う位置から軸線に直交する位置まで、互いに反対向きに約９０度の角度範囲を回動する。押え板５５の先端部は、斜め下向きに湾曲形成されている。基板５２の側縁部には上方に延出する一対のストッパー５６，５６が形成されて、これらのストッパー５６が各押え板５５をそれぞれ軸線に直交する位置で止めるようになっている。基部５１の高さは壁断熱パネル１の縦枠材１１ａにおける張出縁１１１の見込み寸法とほぼ等しく形成されており、基部５１の中央には下方に延びる軸柱５７が固着されている。
【００２３】
この壁断熱パネル取付金具５は、軸柱５７を間柱２１の中央の隙間に挿入した状態で間柱２１に固定される。固定に際しては、間柱２１の背面側（屋内側）から軸柱５７の先端部にピン状の係止部材５８を嵌め込むか、軸柱５７の先端をボルト状に加工して間柱２１の背面側からナット締結する。壁断熱パネル１は、図４に示したように、この壁断熱パネル取付金具５を縦目地部分に挟み込むようにして建て込まれる。そして、壁断熱パネル取付金具５の各押え板５５を回動させて、隣接する壁断熱パネル１の縦枠材１１ａの張出縁１１１にそれぞれ係合させ、締付ビス５３を締め付けると、押え板５５の先端部が縦枠材１１ａを間柱２１側に押圧する。これにより、間柱２１の表面に貼着された気密テープ４が壁断熱パネル１との間に圧縮され、間柱２１と壁断熱パネル１とが気密的に連結される。
【００２４】
図６に示す壁断熱パネル取付金具５０は、木質材からなる矩形断面の柱２２に取り付けられる形態を示したものである。この壁断熱パネル取付金具５０は、主要部分において前記図５に示したものとほぼ同じであるが、基部５１に軸柱がなく、基部５１を直接、柱２２の屋外側表面に対してビス止めできるようになっている。ビス止めを容易にするために、基部５１の底面は軸線方向に延長されて、その延長部分にビス孔５９が形成されている。
【００２５】
このような壁断熱パネル取付金具５，５０を使用することにより、押え板５５を回動させて締付ビス５３を締結するという簡単な作業で、特別な技量を必要とせずに、壁断熱パネル１を建て込むことができる。そして、壁断熱パネル１が軸組部材２に密着状態で建て込まれることにより、壁断熱パネル１の裏面（屋内側）に貼着された気密フィルム１３と軸組部材２に貼着された気密テープ４とが重なり合って、軸組部材２の屋外側に断熱・気密ラインが形成される。この断熱・気密ラインは断熱材１２の屋内側で連続するので、軸組部材２が外気の影響を受けにくくなり、壁体内結露が生じにくくなる。また、気密フィルム１３と気密テープ４との重なり幅にも十分な余裕があるので、経年によって壁断熱パネル１や気密テープ４が収縮した場合でも、良好な気密性が保持される。
【００２６】
壁断熱パネル１の縦目地部分は、壁断熱パネル取付金具５を挟み込んでいるために、若干の隙間が生じる。そこで、図４に示したように、この縦目地部分には発泡ウレタンその他の発泡樹脂やグラスウール等からなる断熱充填材６が現場で充填される。それぞれに張出縁１１１を備えた縦枠材１１ａは、縦目地部分を挟んで対をなすことにより屋外側に開口した溝部を形成するので、この溝部内に十分な量の断熱充填材６を充填することができる。これにより、縦目地部分においても良好な断熱性が確保される。
【００２７】
こうして、軸組部材２の屋外側に壁断熱パネル１が建て込まれたならば、図３に示すようにして、壁断熱パネル１の屋外側に外壁パネル７を建て込む。外壁パネル７の幅は、壁断熱パネル１の幅と同じモジュールで設計されている。本発明において外壁パネル７の構造や材質は特に限定されないが、基本的には、外装仕上材７１の裏面に軽量溝形鋼等からなる枠材７２を取り付けたものが好適である。
【００２８】
外壁パネル７の取り付けは、壁断熱パネル１の縦目地部分に固定した外壁パネル取付金具８を介して行われる。図７は外壁パネル取付金具８の例を示す。この外壁パネル取付金具８も、前記図５〜図６に示した壁断熱パネル取付金具５と類似の構成を有している。すなわち、基板８２に、締付ビス８３及びコイルスプリング８４を介して２枚の押え板８５，８５が回動自在に取り付けられ、各押え板８５は、互いに反対向きに約９０度の角度範囲を回動して、その先端部で外壁パネル７の枠材７２を押さえつける。
【００２９】
ただし、この外壁パネル取付金具８における基板８２は、平坦な固定板８１に固着された形態を有している。固定板８１は、縦目地部分を挟んで対をなす壁断熱パネル１の両縦枠材１１ａに跨がる板幅に形成され、各縦枠材１１ａの屋外側見付面にビス固定されるようになっている。また、固定板８１の下側には、バネ鋼板を折曲して形成されたクリップ部８７が設けられ、このクリップ部８７が対をなす縦枠材１１ａによって形成された溝部の内側に嵌め込まれるようになっている。これにより、壁断熱パネル１の縦目地に対して外壁パネル７の縦目地を容易に一致させることができる。
【００３０】
このように本発明の外断熱壁構造及び壁工法では、枠内に断熱材１２を充填して裏面に気密フィルム１３を貼着した壁断熱パネル１が軸組部材２の外側に建て込まれるので、壁断熱パネル１の枠材１１の断面寸法を規格化することにより、外壁の下地材や仕上材を軸組部材２に対して共通の納まりで取り付けることができる。断熱材１２は各壁断熱パネル１の枠内に充填されるので、環境条件や建物部位によって断熱材１２の厚みが変化する場合でも、壁厚を一定に揃えることができる。なお、図４中に符号２３で示した部分は空気層となる。
【００３１】
また、本発明の外断熱壁構造及び壁工法では、軸組部材２の表面に貼着された気密テープ４と、壁断熱パネル１の裏面に貼着された気密フィルム１３とが重なり合うようにして壁断熱パネル１が建て込まれるので、連続した断熱・気密ラインが形成されるとともに、その気密性を長期的に保持することができる。
【００３２】
また、本発明の外断熱壁構造及び壁工法では、壁断熱パネル１が縦目地部分に配した壁断熱パネル取付金具５を介して軸組部材２に取り付けられ、さらに、外壁パネル７も類似の構造を有する外壁パネル取付金具８を介して壁断熱パネル１の枠材１１に取り付けられるので、特別や技量を必要とすることなく、簡単な作業で効率的に施工することができる。壁断熱パネル取付金具５と外壁パネル取付金具８との間は現場充填の断熱充填材６で分断されるので、壁を貫通する金属部分はなく、したがって冷橋も生じない。これにより、壁体内での結露やカビの発生を効果的に防ぐことができ、建物の耐久性能も向上する。また、このような取付金具を利用することにより、増改築等に際しても各部材を破壊することなく容易に取り外すことが可能になり、リサイクル性が向上する。
【００３３】
【発明の効果】
本発明の外断熱壁構造及び壁工法は、枠内に断熱材を充填して裏面に気密フィルムを貼着した壁断熱パネルが、軸組部材の外側に建て込まれて断熱・気密ラインを形成するように構成される。したがって、壁断熱パネルの枠材の断面寸法を規格化することにより、断熱材の厚みが変化しても、外壁の下地材や仕上材を軸組部材に対して共通の納まりで取り付けることができる。
【００３４】
また、本発明の外断熱壁構造及び壁工法では、軸組部材の表面に貼着された気密テープと、壁断熱パネルの裏面に貼着された気密フィルムとが、十分な幅をもって重なり合うので、断熱・気密ラインの連続性が良好に確保されるとともに、それを長期的にも保持することができる。
【００３５】
また、本発明の外断熱壁構造及び壁工法では、壁断熱パネルが縦目地部分に配した壁断熱パネル取付金具を介して軸組部材に取り付けられ、さらに、外壁パネルも類似の構造を有する外壁パネル取付金具を介して壁断熱パネルの枠材に取り付けられるので、特別や技量を必要とすることなく、簡単な作業で効率的に施工することができる。壁断熱パネル取付金具と外壁パネル取付金具との間に断熱充填材を充填することにより、壁を貫通する金属部分をなくして、冷橋の発生を防ぐこともできる。また、このような取付金具を利用することにより、増改築等に際しても各部材のリサイクルが容易になる。
【図面の簡単な説明】
【図１】本発明の壁断熱パネルの基本的な構成を示す分解斜視図である。
【図２】本発明の外断熱壁構造及び壁工法（前半部分）の基本的構成を示す部分斜視図である。
【図３】本発明の外断熱壁構造及び壁工法（後半部分）の基本的構成を示す部分斜視図である。
【図４】図２〜図３の外断熱壁構造における壁断熱パネルの縦目地部分の詳細を示す部分断面図である。
【図５】軽量鉄骨軸組建物に適した壁断熱パネル取付金具の詳細を示す図であり、（ａ）は上面図、（ｂ）は側面図である。
【図６】木造軸組建物に適した壁断熱パネル取付金具の詳細を示す図であり、（ａ）は上面図、（ｂ）は側面図である。
【図７】外壁パネル取付金具の詳細を示す図であり、（ａ）は上面図、（ｂ）は側面図である。
【図８】従来の技術にかかる外断熱壁構造の基本的な構成を示す部分斜視図である。
【符号の説明】
１壁断熱パネル
１１枠材
１１ａ縦枠材
１１１張出縁
１２断熱材
１３気密フィルム
２軸組部材
２１間柱
２２柱
４気密テープ
５壁断熱パネル取付金具
５１基部
５２基板
５３締付ビス
５４コイルスプリング
５５押え板
６断熱充填材
７外壁パネル
８外壁パネル取付金具[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wall structure and a wall construction method of an outer heat insulation system in which a heat insulation / airtight line is formed on the outdoor side of a structure, particularly in a wooden or steel building.
[0002]
[Prior art]
In recent years, research on improving the airtightness and thermal insulation of buildings has been actively conducted from the viewpoint of effective utilization of resources and energy and extending the life of buildings. Such high airtightness and high heat insulation type construction methods generally include an internal heat insulation method in which a heat insulation / airtight line consisting of a heat insulating material and an airtight material (airtight film, etc.) is provided on the indoor side of the structure, and heat insulation on the outdoor side of the structure. -It is roughly divided into an outer heat insulation method that provides an airtight line. Traditionally, internal heat insulation methods have been the mainstream in Japan, but there are gaps (discontinuous parts) between the insulation and airtight lines around the joints of the insulation and around the outlets, and condensation tends to occur inside the walls and walls. It was pointed out that mold and mites were generated, and the building was likely to deteriorate.
[0003]
On the other hand, the outer heat insulation method is easier to ensure the continuity of the heat insulation / airtight line than the inner heat insulation method. Since the structure is located on the indoor side of the heat insulating material, it has the advantages that it is less susceptible to changes in temperature and humidity of the outside air, is less likely to cause internal condensation, and improves the durability of the building.
[0004]
When such an external heat insulation method is applied to a wooden frame building, conventionally, as shown in FIG. 8, as shown in FIG. ing. The joint between the heat insulating materials 93 is jointed, and the heat insulating and airtight lines are continuous by sticking an airtight tape 95 to the joint portion and the joint portion with other members, or filling with foamed urethane etc. on site. Let Subsequently, a moisture-permeable waterproof sheet 96 is adhered to the outdoor side of the heat insulating material 93, and a trunk edge 97 or the like is attached to the pillars 91 and 92 or the beam with a nail 94 or a screw. 98 is attached.
[0005]
[Problems to be solved by the invention]
The conventional construction method is a process in which the heat insulating material 93 is attached to the structure from the outdoor side without gaps, and the moisture-permeable waterproof sheet 96, the trunk edge 97, the outer wall finishing material 98, and the like are sequentially attached. Since it is carried out, there are many members to be handled at the site, which is complicated and difficult in construction. Therefore, depending on the skill of the installer, there is a high possibility that the construction accuracy will deteriorate and the heat insulation performance will vary. In particular, at the joint between the heat insulating materials 93 and a portion where the heat insulating material 93 is in contact with other members, defects in the heat insulating and airtight lines are likely to occur due to defects in the airtight tape 95 and poor filling of urethane foam. Further, shrinkage of the heat insulating material 93 and peeling of the airtight tape 95 due to aging occur. Such a deficiency in the heat insulation / airtight line causes condensation due to moisture leakage and promotes deterioration of the building.
[0006]
Further, when the heat insulating material 93, the trunk edge 97, and the like are attached to the columns 91, 92 and the beam, the nails 94 and screws are driven through the heat insulating material 93 having a thickness of several tens of mm or more. At this time, since the columns 91 and 92 and the beam cannot be seen from the working side, the nail 94 and the screw may come off the columns 91 and 92 and the beam. Then, the nail 94 or the like penetrating through becomes a cold bridge, and moisture on the indoor side is condensed on the surface of the nail 94 or the like exposed to the indoor side, thereby causing mold and rusting of the metal part.
[0007]
Further, in the conventional construction method, when the outer wall is removed during expansion and renovation, the heat insulating material 93 is easily broken when the nail 94 is removed, so that there is a problem also in terms of separating and collecting waste materials and recycling.
[0008]
Accordingly, the present invention solves the problem of providing a wall structure and a wall construction method of an outer heat insulation system that can be easily constructed on site, easily ensure continuity of heat insulation and airtight lines, and hardly cause deterioration of a building over the long term. Let it be an issue.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problems, an outer heat insulating wall structure of the present invention includes a pillar, a beam, a trunk edge and other shaft members, a wall heat insulating panel built on an outdoor surface of the shaft member, and the wall heat insulating panel. In the outer heat insulation wall structure that works with the outer wall panel attached to the outdoor side of
(A) An airtight tape is attached to the outdoor side surface of the shaft assembly member,
(B) The wall insulation panel includes a frame material made of a wood material, a heat insulating material filled in a frame surrounded by the frame material, and an airtight film adhered to the entire indoor side of the frame material and the heat insulating material. And the vertical frame member positioned on the vertical side of the frame member has a substantially L-shaped cross-sectional shape with an outwardly extending edge at the indoor side edge, and the wall heat insulating panel. Is built in close contact with the outdoor side of the shaft assembly member,
(C) A vertical joint where the wall heat insulation panels are abutted in the left-right direction is rotatably attached to the base via a base, a base fixed to the base, a fastening screw and a coil spring. A wall heat insulation panel mounting bracket comprising two presser plates is fixed to the frame assembly member with the base portion sandwiched between the vertical joint portions, and the vertical wall of the wall heat insulation panel is supported by the presser plate. The overhang edge of the frame member is pressed to the shaft assembly member side, and the wall heat insulation panel is fixed to the shaft assembly member,
(D) a groove formed in the vertical joint portion is filled with a heat insulating filler;
(E) It is attached to the outdoor side finding surface of both vertical frame members of the wall heat insulation panel that makes a pair with the vertical joint portion interposed therebetween so as to be rotatable on the substrate via a substrate, a tightening screw and a coil spring. The outer wall panel mounting bracket comprising the two holding plates is attached in a state where the wall heat insulating panel mounting bracket is thermally separated from the heat insulating filler,
(F) An outer wall panel is attached to the outdoor side of the wall heat insulating panel via the outer wall panel mounting bracket.
[0013]
Moreover, the outer heat insulating wall construction method of the present invention is
(A) Adhere airtight tape on the outdoor side surface of pillars, beams, trunk edges and other shaft members,
(B) Next, a wall heat insulation panel in which a heat insulating material is filled in advance inside a frame material made of a wooden material and an airtight film is adhered to the entire indoor side is brought into close contact with the outdoor side of the frame member. Including
(C) Next, each wall heat insulation panel is fixed to the shaft assembly member by a wall heat insulation panel mounting bracket disposed on the joint portion of the wall heat insulation panel,
(D) Next, the joint portion of the wall insulation panel is filled with a heat insulation filler,
(E) Next, on the joint portion of the wall heat insulation panel, the wall heat insulation panel mounting bracket is attached to the outer wall panel mounting bracket in a state where it is thermally divided through the heat insulating filler,
(F) The outer wall panel is attached to the outdoor side of the wall heat insulation panel via the outer wall panel mounting bracket.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0016]
FIG. 1 is an exploded perspective view showing a basic configuration of a wall heat insulating panel used in the outer heat insulating wall structure and wall construction method of the present invention. 2 to 3 are partial perspective views showing the basic structure of the outer heat insulating wall structure and wall construction method of the present invention, and FIG. 4 is the wall heat insulation in the outer heat insulating wall structure shown in FIGS. It is a fragmentary sectional view which shows the detail of the vertical joint part of a panel.
[0017]
The wall heat insulation panel 1 includes a frame material 11 that forms four laps, a heat insulation material 12 filled in a frame surrounded by the frame material 11, and a back surface (indoor side) of the frame material 11 and the heat insulation material 12. An airtight film 13 is provided. As shown in FIG. 2, a plurality of the wall insulation panels 1 are installed adjacent to the outdoor side of the shaft assembly member 2 composed of building columns, studs, beams, trunk edges, etc. 2 is formed on the outdoor side.
[0018]
The frame material 11 of the wall heat insulation panel 1 according to the illustrated embodiment is a wood material having a prospective dimension of about 100 mm, and the vertical frame material 11a located on the vertical side is an indoor side edge portion as shown in FIG. Are formed in a substantially L-shaped cross section having an outwardly extending edge 111. Further, the upper frame member 11b located on the upper side has a substantially trapezoidal cross-sectional shape, and is formed so that the upper surface thereof is flush with the upper surface of the roof frame 3 made of a purlin member or the like.
[0019]
The heat insulating material 12 is formed using, for example, a foamed resin such as hard urethane, glass wool, or another general heat insulating material. The thickness of the heat insulating material 12 is about 75 mm in this example, but is arbitrarily set in accordance with the required heat insulating performance as long as it falls within the expected dimensions of the frame material 11. For the airtight film 13, for example, a polypropylene film having a thickness of about 0.1 mm is used.
[0020]
In the illustrated building, the frame members 2 such as columns, girders, studs, and rims are made of lightweight steel frames. In the outer heat insulating wall structure and the wall construction method of the present invention, the airtight tape 4 is adhered to the outdoor side surface of the shaft assembly member 2 before the wall heat insulating panel 1 is built. The airtight tape 4 is made of foamed resin such as foamed polyethylene, foamed urethane, foamed polystyrene, or synthetic rubber such as foamed EPDM (ethylene / propylene / diene terpolymer), and has a thickness of at least 2 mm. Preferably, it is formed in a strip-shaped body of about 3 mm. Such a foam is preferably a foam having independent bubbles (independent foam), but a material having an airtight face layer on at least one surface of a material having open cells (continuous foam) can also be used. By attaching this airtight tape 4 to the surface of the shaft assembly member 2 and bringing the wall heat insulation panel 1 into intimate contact, a minute unevenness appearing on the surface of the shaft assembly member 2 or the back surface (indoor side surface) of the wall insulation panel 1. Is absorbed and a highly accurate heat insulation and airtight line is formed.
[0021]
When the heat insulating wall panel is attached to the shaft assembly member 2, for example, a wall heat insulating panel mounting bracket 5 as shown in FIG. 5 is used. The illustrated wall heat insulation panel mounting bracket 5 has a form that can be mounted on a stud 21 that is configured with two lip-shaped channel steels back to back.
[0022]
The wall heat insulating panel mounting bracket 5 has a base plate 52 fixed to a base 51 having a substantially rectangular cross section having an opening groove on the upper surface, and two screws 52 and a coil spring 54 on the base plate 52. A structure is provided in which the presser plates 55 and 55 are rotatably attached. The head of the tightening screw 53 is processed into a knurled shape so that it can be turned with a fingertip, and a hexagonal hole for wrench fastening is formed on the top surface of the head. Further, the leg portion of the tightening screw 53 is screwed into a female screw hole formed in the substrate 52. Each presser plate 55 is held on the head side of the fastening screw 53 by the elastic force of the coil spring 54, and has an angle of about 90 degrees in the opposite direction from the position along the axis of the base 51 to the position orthogonal to the axis. Rotate the range. The front end portion of the presser plate 55 is curved and formed obliquely downward. A pair of stoppers 56, 56 extending upward are formed on the side edge of the substrate 52, and these stoppers 56 stop the pressing plates 55 at positions orthogonal to the axis. The height of the base 51 is formed substantially equal to the expected size of the overhanging edge 111 in the vertical frame member 11 a of the wall heat insulating panel 1, and a shaft column 57 extending downward is fixed to the center of the base 51.
[0023]
The wall heat insulating panel mounting bracket 5 is fixed to the spacer 21 in a state where the shaft column 57 is inserted into the central gap of the spacer 21. At the time of fixing, a pin-like locking member 58 is fitted from the back side (indoor side) of the stud 21 to the tip of the shaft pillar 57, or the tip of the spindle 57 is processed into a bolt shape and the back side of the stud 21 is fixed. Tighten the nut. As shown in FIG. 4, the wall heat insulation panel 1 is built in such a manner that the wall heat insulation panel mounting bracket 5 is sandwiched between vertical joint portions. Then, when each presser plate 55 of the wall heat insulation panel mounting bracket 5 is rotated and engaged with the protruding edge 111 of the vertical frame member 11a of the adjacent wall heat insulation panel 1, and the tightening screw 53 is tightened, the presser is pressed. The front end portion of the plate 55 presses the vertical frame member 11a toward the intermediate pillar 21 side. Thereby, the airtight tape 4 stuck on the surface of the intermediate pillar 21 is compressed between the wall heat insulation panel 1, and the intermediate pillar 21 and the wall heat insulation panel 1 are connected airtightly.
[0024]
The wall heat insulation panel attachment metal fitting 50 shown in FIG. 6 shows the form attached to the pillar 22 of the rectangular cross section which consists of a wood material. The wall heat insulation panel mounting bracket 50 is substantially the same as that shown in FIG. 5 in the main part, but the base 51 does not have an axial column, and the base 51 is directly screwed to the outdoor side surface of the column 22. It can be done. In order to facilitate screwing, the bottom surface of the base 51 is extended in the axial direction, and a screw hole 59 is formed in the extended portion.
[0025]
By using such wall heat insulation panel mounting brackets 5 and 50, the wall heat insulation panel can be obtained by a simple operation of rotating the press plate 55 and fastening the fastening screw 53 without requiring any special skill. 1 can be built. And since the wall heat insulation panel 1 is built in close contact with the frame member 2, the airtight film 13 stuck to the back surface (indoor side) of the wall heat insulation panel 1 and the air tightness stuck to the shaft member 2 The tape 4 overlaps and a heat insulating / airtight line is formed on the outdoor side of the shaft assembly member 2. Since this heat insulation / air-tight line is continuous on the indoor side of the heat insulating material 12, the frame assembly member 2 is less susceptible to the influence of outside air, and condensation in the wall is less likely to occur. Moreover, since the overlap width of the airtight film 13 and the airtight tape 4 also has a sufficient margin, even when the wall heat insulation panel 1 and the airtight tape 4 shrink due to aging, good airtightness is maintained.
[0026]
Since the wall heat insulation panel mounting bracket 5 is sandwiched in the vertical joint portion of the wall heat insulation panel 1, a slight gap is generated. Therefore, as shown in FIG. 4, the vertical joint portion is filled with a heat insulating filler 6 made of foamed urethane or other foamed resin, glass wool or the like on site. Each of the vertical frame members 11a provided with the overhanging edges 111 forms a groove portion opened to the outdoor side by making a pair with the vertical joint portion interposed therebetween, so that a sufficient amount of the heat insulating filler 6 is provided in the groove portion. Can be filled. Thereby, favorable heat insulation is ensured also in a vertical joint part.
[0027]
Thus, if the wall heat insulation panel 1 is built in the outdoor side of the shaft member 2, the outer wall panel 7 is built in the outdoor side of the wall heat insulation panel 1 as shown in FIG. The width of the outer wall panel 7 is designed with the same module as the width of the wall insulation panel 1. In the present invention, the structure and material of the outer wall panel 7 are not particularly limited, but basically, a frame member 72 made of lightweight channel steel or the like is attached to the back surface of the exterior finishing material 71.
[0028]
The outer wall panel 7 is attached through an outer wall panel mounting bracket 8 fixed to a vertical joint portion of the wall heat insulating panel 1. FIG. 7 shows an example of the outer wall panel mounting bracket 8. The outer wall panel mounting bracket 8 also has a configuration similar to that of the wall heat insulating panel mounting bracket 5 shown in FIGS. That is, two presser plates 85 and 85 are rotatably attached to the substrate 82 via a fastening screw 83 and a coil spring 84, and each presser plate 85 has an angle range of about 90 degrees in opposite directions. It rotates and presses the frame material 72 of the outer wall panel 7 at its tip.
[0029]
However, the substrate 82 in the outer wall panel mounting bracket 8 is fixed to a flat fixing plate 81. The fixing plate 81 is formed to have a plate width that straddles both the vertical frame members 11a of the wall heat insulating panel 1 that forms a pair with the vertical joint portion interposed therebetween, and is screwed to the outdoor-side finding surface of each vertical frame member 11a. It is like that. Further, a clip portion 87 formed by bending a spring steel plate is provided below the fixed plate 81, and the clip portion 87 is fitted inside a groove portion formed by a pair of vertical frame members 11a. It is like that. Thereby, the vertical joint of the outer wall panel 7 can be easily matched with the vertical joint of the wall heat insulation panel 1.
[0030]
Thus, in the outer heat insulating wall structure and the wall construction method of the present invention, the wall heat insulating panel 1 in which the heat insulating material 12 is filled in the frame and the airtight film 13 is adhered to the back surface is built outside the frame member 2. By standardizing the cross-sectional dimensions of the frame material 11 of the wall heat insulating panel 1, the base material and finishing material of the outer wall can be attached to the shaft assembly member 2 in a common manner. Since the heat insulating material 12 is filled in the frame of each wall heat insulating panel 1, even when the thickness of the heat insulating material 12 varies depending on environmental conditions and building parts, the wall thickness can be made uniform. In addition, the part shown with the code | symbol 23 in FIG. 4 becomes an air layer.
[0031]
Further, in the outer heat insulating wall structure and wall construction method of the present invention, the airtight tape 4 attached to the surface of the frame member 2 and the airtight film 13 attached to the back surface of the wall heat insulating panel 1 are overlapped. Since the wall heat insulation panel 1 is built, a continuous heat insulation / airtight line can be formed and the airtightness can be maintained for a long time.
[0032]
Moreover, in the outer heat insulation wall structure and wall construction method of this invention, the wall heat insulation panel 1 is attached to the shaft assembly member 2 via the wall heat insulation panel attachment metal fitting 5 arranged in the vertical joint part, and also the outer wall panel 7 is similar. Since it is attached to the frame material 11 of the wall heat insulation panel 1 via the outer wall panel mounting bracket 8 having a structure, it can be efficiently constructed by a simple operation without requiring special or skill. Since the space between the wall heat insulating panel mounting bracket 5 and the outer wall panel mounting bracket 8 is divided by the heat insulating filler 6 filled in the field, there is no metal portion penetrating the wall, and therefore no cold bridge is formed. This can effectively prevent the formation of dew condensation and mold in the wall and improve the durability of the building. In addition, by using such a mounting bracket, it becomes possible to easily remove each member without destroying it when expanding or remodeling, and the recyclability is improved.
[0033]
【The invention's effect】
In the outer heat insulating wall structure and wall construction method of the present invention, a wall heat insulating panel in which a frame is filled with a heat insulating material and an airtight film is adhered to the back surface is built outside the frame member to form a heat insulating / airtight line. Configured to do. Therefore, by standardizing the cross-sectional dimensions of the frame material of the wall heat insulation panel, even if the thickness of the heat insulation material changes, the base material and finishing material of the outer wall can be attached to the frame assembly member in a common manner. .
[0034]
Further, in the outer heat insulating wall structure and the wall construction method of the present invention, the airtight tape attached to the surface of the frame assembly member and the airtight film attached to the back surface of the wall heat insulating panel overlap with a sufficient width, The continuity of the heat-insulating / air-tight line is ensured well, and it can be maintained for a long time.
[0035]
Further, in the outer heat insulating wall structure and the wall construction method of the present invention, the wall heat insulating panel is attached to the shaft assembly member via the wall heat insulating panel mounting bracket arranged on the vertical joint portion, and the outer wall panel has an analogous structure. Since it is attached to the frame material of the wall heat insulation panel via the panel mounting bracket, it can be efficiently constructed by a simple operation without requiring special or skill. By filling a heat insulating filler between the wall heat insulating panel mounting bracket and the outer wall panel mounting bracket, it is possible to eliminate the metal portion penetrating the wall and prevent the occurrence of a cold bridge. In addition, by using such a mounting bracket, it becomes easy to recycle each member even during expansion and reconstruction.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a basic configuration of a wall heat insulation panel of the present invention.
FIG. 2 is a partial perspective view showing a basic configuration of an outer heat insulating wall structure and a wall construction method (first half part) according to the present invention.
FIG. 3 is a partial perspective view showing a basic configuration of an outer heat insulating wall structure and a wall construction method (second half part) according to the present invention.
FIG. 4 is a partial cross-sectional view showing details of a vertical joint portion of the wall heat insulation panel in the outer heat insulation wall structure of FIGS.
FIGS. 5A and 5B are diagrams showing details of a wall heat insulating panel mounting bracket suitable for a lightweight steel frame building, wherein FIG. 5A is a top view and FIG. 5B is a side view.
FIGS. 6A and 6B are diagrams showing details of a wall heat insulating panel mounting bracket suitable for a wooden frame building, wherein FIG. 6A is a top view and FIG. 6B is a side view.
7A and 7B are diagrams showing details of the outer wall panel mounting bracket, wherein FIG. 7A is a top view and FIG. 7B is a side view.
FIG. 8 is a partial perspective view showing a basic configuration of an outer heat insulating wall structure according to a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Wall heat insulation panel 11 Frame material 11a Vertical frame material 111 Overhang edge 12 Heat insulation material 13 Airtight film 2 Axle member 21 Spacer 22 Pillar 4 Airtight tape 5 Wall heat insulation panel mounting bracket 51 Base 52 Substrate 53 Clamping screw 54 Coil spring 55 Presser plate 6 Insulation filler 7 Outer wall panel 8 Outer wall panel mounting bracket

Claims

In an outer heat insulating wall structure comprising a column, a beam, a trunk edge and other shaft members, a wall heat insulating panel built on the outdoor surface of the shaft member, and an outer wall panel attached to the outdoor side of the wall heat insulating panel ,
(A) An airtight tape is attached to the outdoor side surface of the shaft assembly member,
(B) The wall insulation panel includes a frame material made of a wood material, a heat insulating material filled in a frame surrounded by the frame material, and an airtight film adhered to the entire indoor side of the frame material and the heat insulating material. And the vertical frame member positioned on the vertical side of the frame member has a substantially L-shaped cross-sectional shape with an outwardly extending edge at the indoor side edge, and the wall heat insulating panel. Is built in close contact with the outdoor side of the shaft assembly member,
(C) A vertical joint where the wall heat insulation panels are abutted in the left-right direction is rotatably attached to the base via a base, a base fixed to the base, a fastening screw and a coil spring. A wall heat insulation panel mounting bracket comprising two presser plates is fixed to the frame assembly member with the base portion sandwiched between the vertical joint portions, and the vertical wall of the wall heat insulation panel is supported by the presser plate. The overhang edge of the frame member is pressed to the shaft assembly member side, and the wall heat insulation panel is fixed to the shaft assembly member,
(D) a groove formed in the vertical joint portion is filled with a heat insulating filler;
(E) It is attached to the outdoor side finding surface of both vertical frame members of the wall heat insulation panel that makes a pair with the vertical joint portion interposed therebetween so as to be rotatable on the substrate via a substrate, a tightening screw and a coil spring. The outer wall panel mounting bracket comprising the two holding plates is attached in a state where the wall heat insulating panel mounting bracket is thermally separated from the heat insulating filler,
(F) An outer heat insulating wall structure, wherein an outer wall panel is attached to the outdoor side of the wall heat insulating panel via the outer wall panel mounting bracket.

(A) Adhere airtight tape on the outdoor side surface of pillars, beams, trunk edges and other shaft members,
(B) Next, a wall heat insulation panel in which a heat insulating material is filled in advance inside a frame material made of a wooden material and an airtight film is adhered to the entire indoor side is brought into close contact with the outdoor side of the frame member. Including
(C) Next, each wall heat insulation panel is fixed to the shaft assembly member by a wall heat insulation panel mounting bracket disposed on the joint portion of the wall heat insulation panel,
(D) Next, the joint portion of the wall insulation panel is filled with a heat insulation filler,
(E) Next, on the joint portion of the wall heat insulation panel, the wall heat insulation panel mounting bracket is attached to the outer wall panel mounting bracket in a state where it is thermally divided through the heat insulating filler,
(F) An outer heat insulating wall construction method, wherein an outer wall panel is attached to the outdoor side of the wall heat insulating panel via the outer wall panel mounting bracket.