JP3871419B2

JP3871419B2 - Heat insulation material for joist and floor in steel house and heat insulation structure of house

Info

Publication number: JP3871419B2
Application number: JP32459897A
Authority: JP
Inventors: 哲生須田; 典正三原; 忠男関口
Original assignee: ダウ化工株式会社
Priority date: 1997-11-26
Filing date: 1997-11-26
Publication date: 2007-01-24
Anticipated expiration: 2017-11-26
Also published as: JPH11159019A

Description

【０００１】
【発明の属する技術分野】
この発明はスチールハウスの根太に使用される根太用断熱材と、根太用断熱材を用いて根太に断熱を施した床の断熱構造、及び根太用断熱材を含む床と家屋全体の断熱構造に関するものである。
【０００２】
【従来の技術及び発明が解決しようとする課題】
枠組壁工法に使用されるパネルの木材を軽量形鋼に置き換えた形式のスチールハウスは木造住宅にない防火性能や耐蝕性能がある他、白蟻対策が不要である等の利点を持つ上、枠組壁工法と同様の要領で施工できる簡便さがあることから、住宅の新工法として注目されつつあるが、鋼材は木材よりかに熱伝導性が高いため、断熱性能の確保に課題が残る。
【０００３】
外壁においては木造住宅の場合と同様に、躯体の屋外側全面に断熱材を張ることにより、屋根面や天井面においても垂木や天井根太に沿って断熱材を全面に張ることによりそれぞれ一定の断熱性能を確保することはできる。しかし、床下においては、隣接する根太間に断熱材を敷設することで断熱性能を確保することから、この断熱材によっては鋼製の根太が床下の外気に触れることによる熱伝導を防止することができない。
【０００４】
この発明は上記背景より、スチールハウスの根太に適した断熱材とスチールハウス特有の床の断熱構造を提案するものである。
【０００５】
【課題を解決するための手段】
床下の隣接する根太間における断熱性は根太間に配置される床用断熱材によって確保され、床用断熱材は根太の天端から、根太の高さ方向の中間部の高さまでの外周を覆うため、この床用断熱材と共に根太における断熱性を確保するとすれば、根太に対する断熱材は根太の少なくとも下側の外周を包囲するように配置されればよいことになる。
【０００６】
本発明では成型された断熱材を使用する場合は、請求項１に記載のように溝形断面形状に成型された一個の弾性を有する断熱材ユニットから、もしくは請求項２に記載のように溝形断面形状に組み合わせられる複数個の断熱材ユニットから根太用断熱材を構成することにより、根太の少なくとも下側の外周を包囲し、根太と床下の外気との接触を遮断し、根太における熱伝導を防止する。
【０００７】
スチールハウスの根太にはリップ溝形鋼が使用されることから、一個の断熱材ユニットを用いる場合、その断熱材ユニットは根太のリップ部分において下向きに係止，もしくは係合することで、あるいは根太の外周面に接着されることで根太に支持され得る。このため、弾性を利用し、一旦開いた後に閉じて根太を挟み込みながら、断熱材ユニットを根太に支持させることで断熱材ユニット自身を根太からの離脱に対して安定させることが可能で、隣接する根太間に敷設される床用断熱材を支持する機能を持たせることもできる。
【０００８】
複数個の断熱材ユニットを用いる場合は、請求項３に記載のように隣接する断熱材ユニットが根太の下端の位置で互いに接合されながら根太に支持されることにより離脱に対して安定し、床用断熱材を支持する機能を持つ。または請求項４に記載のように根太の幅方向両側に位置する二個の断熱材ユニットが根太の上端を回り込む吊り材で互いに連結され、根太の下端位置で互いに接合されながら吊り材によって根太に吊り支持されることにより、根太に支持された状態での安定性を確保し、床用断熱材を支持する機能を持つ。前者の場合、複数個の断熱材ユニットは互いに接合されながら、根太に係止，もしくは係合する、あるいは接着されることにより根太に支持される。
【０００９】
根太の幅方向両側に位置する二個の断熱材ユニットが吊り材で連結された場合は根太用断熱材が根太に吊り支持されるため、根太を包囲した状態と、床用断熱材を支持した状態での落下に対する安全性が高い。
【００１０】
成型された断熱材を使用する場合、床の、特に根太の断熱は請求項５に記載のように上記のいずれかの根太用断熱材で根太の少なくとも下側の外周を包囲することで施され、この場合、成型された断熱材ユニットを用いるため、根太への取付作業が単純化され、施工能率が高い。
【００１１】
根太用断熱材として使用される成型された断熱材は具体的には押出発泡ポリスチレン，ビーズ型内発泡ポリスチレン，発泡ポリエチレン，発泡ポリウレタン，発泡ポリイソシアヌレート等の成型発泡プラスチック板であり、後述の床用断熱材や端根太用断熱材の他、外壁用断熱材、屋根用断熱材、天井用断熱材が成型された断熱材である場合も同様である。
【００１２】
根太用断熱材として繊維系断熱材を使用する場合は、請求項６に記載のように根太の少なくとも下側の外周に断熱材を巻き付けることにより床の根太部分における断熱が施され、現場で発泡させる発泡プラスチック系断熱材を使用する場合は、請求項７に記載のように根太の少なくとも下側の外周に断熱材を吹き付けることにより根太部分における断熱が施される。
【００１３】
繊維系断熱材の具体例にはグラスウール，ロックウール等があり、現場発泡の発泡プラスチック系断熱材の具体例には発泡ポリウレタン，発泡ポリユリア等がある。これらの繊維系断熱材と現場発泡の断熱材は後述する床用断熱材、端根太用断熱材、外壁用断熱材、屋根用断熱材及び天井用断熱材にも使用される。
【００１４】
床全体の断熱性は請求項８に記載のように上記の根太に対する断熱と共に、隣接する根太間に床用断熱材を配置することにより、あるいは請求項10に記載のように根太の下に木製の大引きが配置される場合に、隣接する大引き間に床用断熱材を配置することにより確保される。
【００１５】
前記の通り、床用断熱材は根太の天端から、根太の高さ方向の中間部の高さまでの外周を覆うため、請求項８の場合、根太の外周を覆う根太用断熱材の上に床用断熱材が配置されることで、根太用断熱材と床用断熱材によって根太と床下の外気との接触が完全に遮断される。この場合の床用断熱材には板状に成型された発泡プラスチック系断熱材の他、繊維系断熱材や現場で発泡する発泡プラスチック系断熱材が使用される。
【００１６】
床下の外気には基礎梁上で、もしくは基礎梁の屋内側で根太を支持する端根太の屋内側の面も触れるため、床全体の断熱効率を上げる上で、請求項９に記載のように端根太の屋内側にも端根太用断熱材が配置される。この端根太用断熱材にも板状に成型された発泡プラスチック系断熱材の他、繊維系断熱材や現場で発泡する発泡プラスチック系断熱材が使用される。
【００１７】
根太の下に根太を支持する木製の大引きが配置される場合には、請求項10に記載のように隣接する大引き間に床用断熱材を配置すれば、根太は床下の外気に直接触れない状態に置かれるため、根太に対する断熱処理を施さなくとも床の断熱性が確保される。この場合の床用断熱材にも板状に成型された発泡プラスチック系断熱材の他、繊維系断熱材や現場で発泡する発泡プラスチック系断熱材が使用される。
【００１８】
家屋全体の断熱性は請求項11に記載のように上記したいずれかの床断熱と共に、外壁面に沿って外壁用断熱材を配置することにより、更には請求項12に記載のように屋根面，もしくは天井面に沿って屋根用断熱材や天井用断熱材を配置することにより確保される。
【００１９】
請求項11における外壁用断熱材と、請求項12における屋根用断熱材や天井用断熱材にも板状に成型された発泡プラスチック系断熱材の他、繊維系断熱材や現場発泡の発泡プラスチック系断熱材が使用される。
【００２０】
【発明の実施の形態】
請求項１の根太用断熱材１は図１に示すように溝形断面形状に成型された一個の弾性を有する断熱材ユニット２から構成され、単独で溝形断面形の根太５の少なくとも下側の外周を包囲するものである。
【００２１】
根太用断熱材１は根太５を下側から包囲しながら、図14，図15に示すように床材６の下面に敷設される床用断熱材７を支持する役目を持つため、請求項１の断熱材ユニット２は単独で根太５に支持されるように形成される。
【００２２】
根太５には図１以下に示すようにリップ溝形鋼が使用されることから、図１では根太５を包囲した状態で断熱材ユニット２が根太５に支持されるよう、根太５の下側のリップ5cに接する部分に、リップ5cに下向きに係合するフック2aを形成している。一本の断熱材ユニット２は根太５の全長に亘る長さで、あるいは根太５の全長を複数に分割した長さで製作される。
【００２３】
図１の場合、断熱材ユニット２の根太５への取付時には(a) に示すように断熱材ユニット２自身の弾性を利用し、フック2aがリップ5cに衝突しない程度までリップ5aに接する部分を外側に広げた状態で断熱材ユニット２を根太５の下側から差し込み、フック2aがリップ5cの上に位置したところで復元させることにより、(b) に示すようにフック2aがリップ5cに係合し、断熱材ユニット２の内周面が根太５の外周面に密着して根太５への取付が完了する。
【００２４】
断熱材ユニット２が根太５に取り付けられた状態では、断熱材ユニット２の図心がフック2aとリップ5cとの接触部分より根太５のウェブ5a寄りに位置するため、断熱材ユニット２がフック2aとリップ5cとの接触部分の回りに回転しようとするが、断熱材ユニット２の内周面がウェブ5aとフランジ5bとリップ5cに面で密着していることで回転は拘束され、取付状態で安定する。
【００２５】
図１−(c) は断熱材ユニット２の、ウェブ5aとリップ5cに接触する部分の高さを大きくし、フック2aを形成した部分を上下のリップ5c，5c間に差し込みながら、フック2aが形成される側を上下のリップ5c，5cに接触させることで、断熱材ユニット２を取付状態で回転しにくい形に形成した場合を示す。
【００２６】
図11，図15に示すように隣接する根太５，５間に配置される床用断熱材７として板状に成型された発泡プラスチック系断熱材を使用する場合には、断熱材ユニット２の上端上に床用断熱材７が載り、断熱材ユニット２が床用断熱材７と共に根太５を被覆することになるが、断熱材ユニット２は根太５への取付状態で安定できることで、床用断熱材７を支持する能力も持つ。
【００２７】
断熱材ユニット２の根太５に接する内周面、もしくは根太５の外周面に接着剤や粘着剤を塗布しておき、根太５のウェブ5aとリップ5cに接する部分を外側に広げた状態で根太５の下側から断熱材ユニット２を差し込み、根太５のウェブ5aとフランジ5bとリップ5cの少なくともいずれかの面に接着させながら、密着させることによっても断熱材ユニット２は単独で根太５に支持され、併せて床用断熱材７を支持する能力を持つ。その場合は必ずしもリップ5cに接する部分にフック2aを形成する必要はない。
【００２８】
請求項２の根太用断熱材１は図２〜図７に示すように板状，あるいは山形状に成型された複数個の断熱材ユニット３，３から構成され、溝形断面形状に組み合わせられて根太５の少なくとも下側の外周を包囲するものである。この断熱材ユニット３も根太５の全長に亘る長さで、あるいは根太５の全長を複数に分割した長さで製作される。
【００２９】
隣接する複数個の断熱材ユニット３，３は図５〜図７に示すように根太５の下端の位置で互いに接合されることにより根太５の外周を包囲し、根太５へはこの接合によって、または図２，図３に示すように根太５の上端を回り込む吊り材４で互いに連結されることによって支持される。
【００３０】
複数個の断熱材ユニット３，３は図１に示すような溝形に成型された断熱材が図５に示すように根太５のウェブ5aの下方位置、もしくはフランジ5bの幅の範囲内で、あるいは図６，図７に示すようにリップ5cの下方位置で少なくとも二分割された形をし、双方の突合せ面は現場で互いに接合される。
【００３１】
図５−(a) 〜(d) ，図６−(a) 〜(c) は断熱材ユニット３，３を二分割で製作した場合、図７−(a) 〜(d) は三分割で製作した場合を示すが、三分割する場合は根太５のウェブ5aに重なる部分と、リップ5cに重なる部分と、フランジ5bに重なる部分に分割される。
【００３２】
接合は図４−(a) 〜(c) に示すように合决り矧ぎや実矧ぎ，雇い実矧ぎ等のように一方の突合せ面に凹部と凸部を形成し、他方の突合せ面に凸部と凹部を形成し、互いに嵌合させることにより、または(d) に示すように突合せ面に塗布される接着剤や粘着剤により、もしくは突合せ面を熱で溶着することにより、あるいはまた(e) に示すように両断熱材ユニット３，３に跨るテープやステープルにより行われる。
【００３３】
図５〜図７に示す根太用断熱材１において、根太５の幅方向両側に位置する二個の断熱材ユニット３，３の内、リップ5c側に位置する断熱材ユニット３が図１に示す断熱材ユニット２のようにフック2aを有する形状をしているか、または断熱材ユニット３の根太５側の面，もしくは根太５の外周面に接着剤や粘着剤が塗布されていれば、断熱材ユニット３，３は接合によって根太５を包囲しながら、根太５に支持されるため、吊り材４に依らずに床用断熱材７を支持し得る。
【００３４】
図２，図３は根太５の幅方向両側に位置する二個の断熱材ユニット３，３の上端間に吊り材４を架設し、吊り材４によって断熱材ユニット３，３を根太５に支持させる場合の例を示す。吊り材４を用いる場合、根太用断熱材１は三分割されていることもある。
【００３５】
吊り材４は図２に示すように断熱材ユニット３，３の上端の根太５側の縁間に、または根太５に対して外側の縁間に架設され、断熱材ユニット３の長さ方向には一箇所乃至数箇所配置される。図面では吊り材４を断熱材ユニット３，３の根太５側の縁間に架設し、断熱材ユニット３，３の上端面に接着，あるいは接合しているが、断熱材ユニット３，３の根太５側の面に吊り材４を接着，あるいは接合する場合もある。
【００３６】
吊り材４の根太５側の縁間の架設長さは図３−(c) に示すように根太５の幅に、床用断熱材７の厚さの二倍の大きさを加えた程度の大きさになる。吊り材４の材質は根太５上に敷設される床材６が根太５から実質的に浮かない程度の厚さであれば、一切問われない。例えば吊り材４が延性を有する材料の場合、吊り材４の根太５側の縁間の架設長さを根太５の幅に、床用断熱材７の厚さの二倍の大きさを加えた大きさより僅かに小さくしておけば、床用断熱材７の敷設によって吊り材４を延ばした状態で根太５に密着させ、断熱材ユニット３，３と根太５間の隙間の発生を防止することができる。
【００３７】
図２に示す根太用断熱材１は図３−(a) ，(b) に示すように断熱材ユニット３，３を開いた状態で根太５の上から落とし込まれ、(c) に示すように双方の突合せ面が互いに接合されることにより根太５を包囲した状態で設置される。この根太用断熱材１は吊り材４によって根太５に支持されるため、断熱材ユニット３，３の上端上に載る床用断熱材７も吊り材４によって根太５に支持される。
【００３８】
図８〜図11に上記のいずれかの根太用断熱材１を用いて根太５を被覆し、床に断熱を施す場合の施工要領を、図12に施工後の様子を示す。図８〜図12は基礎梁８の天端上に木製の土台９が載り、土台９の上に軽溝形鋼の端根太10が固定され、この端根太10が根太５を支持する場合の例である。
【００３９】
前記の通り、根太用断熱材１が一個の断熱材ユニット２からなる場合は図８に示すように根太５の下方から持ち上げられて設置され、吊り材４で連結された複数個の断熱材ユニット３からなる場合は図３に示すように根太５の上方から落とし込まれて設置される。
【００４０】
図８，図９に示すように根太用断熱材１は各根太５毎に取り付けられ、端根太10側の端部は端根太10に支持される。根太用断熱材１の設置後、図10に示すように端根太10の屋内側の、根太５，５間に端根太用断熱材11が配置される。端根太用断熱材11は端根太10に突き当たる根太５の内周部分にも配置されるが、この根太５内周部分の端根太用断熱材11は図８に示す段階で、根太用断熱材１の設置前に配置される。端根太用断熱材11には板状に成型された発泡プラスチック系断熱材の他、繊維系断熱材や現場で発泡する発泡プラスチック系断熱材が使用される。
【００４１】
その後、図11に示すように隣接する各根太５，５に取り付けられた根太用断熱材１，１間に床用断熱材７が落とし込まれて敷設され、両根太用断熱材１，１に支持される。図11〜図15では根太用断熱材１が成型された発泡プラスチック系断熱材であることに対応し、根太５，５間に配置される床用断熱材７にも板状に成型された発泡プラスチック系断熱材を使用しているが、床用断熱材７は図24，図25に示すような現場で発泡する発泡プラスチック系断熱材の場合や図26に示すような繊維系断熱材の場合もある。
【００４２】
図13は基礎梁８上に土台９がなく、基礎梁８上に直接端根太10が固定された場合の縦断面を、図14は端根太10が根太掛として基礎梁８の屋内側に固定された場合の縦断面を示す。図15は図14の斜視図である。図14は外壁面に沿い、板状に成型された発泡プラスチック系断熱材の外壁用断熱材15を配置した様子も示す。
【００４３】
図16〜図26は根太５の下に木製の大引き12が配置される場合の床断熱の例を示す。これらの場合、図16に示すように土台９と大引き12間、及び大引き12，12間に床用断熱材７が配置されれば根太５を床下の外気に直接触れさせない状態に置くことができるため、根太５を根太用断熱材１で被覆しなくとも床の断熱性が確保される。
【００４４】
土台９と大引き12間、及び大引き12，12間に配置される床用断熱材７は図16〜図18に示す板状に成型された発泡プラスチック系断熱材の他、図19，図20，図26に示す繊維系断熱材や、図21〜図23に示す現場で発泡する発泡プラスチック系断熱材の場合がある。成型された発泡プラスチック系断熱材の場合、床用断熱材７は図16に示すように土台９と大引き12に固定される受け金物13に支持される。
【００４５】
床用断熱材７の敷設後、図17に示すように大引き12と端根太10上に根太５が敷設され、最終的に図18に示すように根太５上に床材６が敷設される。図18は外壁面に沿い、板状に成型された発泡プラスチック系断熱材の外壁用断熱材15を配置した様子も示す。成型された発泡プラスチック系断熱材の外壁用断熱材15はサイディングボード16と柱17の間に挟まれる構造用合板18の屋外側に配置される。
【００４６】
図19，図20は床用断熱材７としてグラスウール等の繊維系断熱材を敷設した場合を示す。この場合、隣接する大引き12と端根太10間、及び大引き12，12間には床用断熱材７を受ける受け材14が架設され、この受け材14上に床用断熱材７が敷設される。図19，図20は外壁用断熱材15にも繊維系断熱材を使用した場合を示すが、繊維系断熱材の外壁用断熱材15も構造用合板18の屋外側に配置される。
【００４７】
図21〜図23は床用断熱材７として現場で発泡する発泡ポリウレタン，発泡ポリユリア等の発泡プラスチック系断熱材を大引き12上の、根太５の下端部分に吹き付けた場合を示す。この場合、床用断熱材７は現場で発泡する発泡プラスチックであることから、根太５の回りにも吹き付けられ、根太用断熱材１を兼ねることになる。大引き12と端根太10間、及び大引き12，12間、または根太５，５間には発泡プラスチックの付着と発泡プラスチックの支持のための受け材14が架設される。
【００４８】
図22は外壁用断熱材15として板状に成型された発泡プラスチック系断熱材を使用した場合を、図23は外壁用断熱材15として発泡プラスチック系断熱材を吹き付けた場合を示す。現場発泡の発泡プラスチック系断熱材の外壁用断熱材15は図21，図23−(a) ，(b) に示すように構造用合板18の屋内側と、端根太10の上に固定される下枠ランナー19上に吹き付けられる。
【００４９】
図24，図25は現場発泡の発泡プラスチック系断熱材を根太用断熱材１と床用断熱材７として使用し、その発泡プラスチック系断熱材を根太５の回りと床材６の下面に吹き付けた場合を示す。図24は外壁用断熱材15として現場発泡の発泡プラスチック系断熱材を吹き付けた場合、図25は成型された発泡プラスチック系断熱材を使用した場合である。
【００５０】
図26は根太５の上端面を除く外周に根太用断熱材１として繊維系断熱材を巻き付けると共に、床用断熱材７としても繊維系断熱材を用い、根太用断熱材１，１間に架設した場合を示す。図26では外壁用断熱材15として成型された発泡プラスチック系断熱材を使用している。
【００５１】
図27は根太用断熱材１と床用断熱材７及び外壁用断熱材15に加え、屋根面に屋根用断熱材20を配置し、家屋全体に断熱を施した場合を示す。屋根用断熱材20は野地板21と垂木22の間に敷設される。
【００５２】
図28は図27の屋根用断熱材20に代え、天井面に天井用断熱材23を配置した場合を示す。天井用断熱材23は天井根太24と天井材25の間に敷設される。
【００５３】
【発明の効果】
請求項１乃至請求項７では根太用断熱材によって根太の少なくとも下側の外周を包囲し、根太と床下の外気との接触を遮断するため、根太における熱伝導を防止できる。
【００５４】
特に請求項１乃至請求項５では成型された一個，もしくは複数個の断熱材ユニットを用いるため、根太への取付作業性がよく、施工能率が向上する。
【００５５】
請求項４，請求項５では根太の幅方向両側に位置する二個の断熱材ユニットを吊り材で互いに連結しているため、断熱材ユニットが根太を包囲した状態と、床用断熱材を支持した状態での落下に対する安全性が高い。
【００５６】
請求項８では請求項１乃至請求項７による根太に対する断熱と共に、根太間に床用断熱材を配置するため、床全体の断熱性が確保される。
【００５７】
請求項９では基礎梁上で、もしくは基礎梁の屋内側で根太を支持する端根太の屋内側にも端根太用断熱材を配置するため、床全体の断熱性が向上する。
【００５８】
請求項10では根太の下に根太を支持する木製の大引きが配置される場合に、隣接する大引き間に床用断熱材を配置することで、根太を床下の外気に直接触れない状態におくため、床の断熱性を確保する上で根太に断熱処理を施す必要がない。
【００５９】
請求項11では請求項８乃至請求項10のいずれかの床断熱に加え、外壁面に沿って外壁用断熱材を配置し、請求項12では屋根面，もしくは天井面に屋根用断熱材や天井用断熱材を配置するため、家屋全体の断熱性が確保される。
【図面の簡単な説明】
【図１】 (a) は請求項１の根太用断熱材を根太に取り付けるときの様子を示した縦断面図、(b) は取付状態を示した縦断面図、(c) は(b) の変形例を示した縦断面図である。
【図２】請求項２，請求項４の根太用断熱材を示した斜視図である。
【図３】図２の根太用断熱材の根太への取付要領を示した縦断面図である。
【図４】請求項２の根太用断熱材を構成する断熱材ユニットの接合部分を示した縦断面図である。
【図５】請求項２の根太用断熱材を根太の下端位置で二分割した場合の断熱材ユニットのパターンを示した縦断面図である。
【図６】請求項２の根太用断熱材を根太のリップ寄りで二分割した場合の断熱材ユニットのパターンを示した縦断面図である。
【図７】請求項２の根太用断熱材を三分割した場合の断熱材ユニットのパターンを示した縦断面図である。
【図８】根太用断熱材を根太に取り付けるときの様子を示した斜視図である。
【図９】根太用断熱材を根太に取り付けた状態を示した斜視図である。
【図１０】端根太に端根太用断熱材を取り付けるときの様子を示した斜視図である。
【図１１】根太用断熱材上に床用断熱材を設置するときの様子を示した斜視図である。
【図１２】床用断熱材の設置が完了した状態を示した縦断面図である。
【図１３】端根太が直接基礎梁に固定される場合の、床用断熱材の設置が完了した状態を示した縦断面図である。
【図１４】端根太が根太掛けとして基礎梁に固定される場合の、床用断熱材の設置が完了した状態を示した縦断面図である。
【図１５】図14の斜視図である。
【図１６】根太の下に大引きが配置される場合に、大引き上に床用断熱材を設置するときの様子を示した斜視図である。
【図１７】大引き上に根太を設置したときの様子を示した斜視図である。
【図１８】根太上に床材を敷設した後の様子を示した縦断面図である。
【図１９】図17の変形例を示した斜視図である。
【図２０】図19の縦断面図である。
【図２１】図17の変形例を示した斜視図である。
【図２２】図21の縦断面図である。
【図２３】 (a) は図22の変形例を示した縦断面図、(b) は(a) の横断面図である。
【図２４】 (a) は図22の変形例を示した縦断面図、(b) は(a) の横断面図である。
【図２５】図24−(a) の変形例を示した縦断面図である。
【図２６】図25の変形例を示した縦断面図である。
【図２７】家屋に対して外壁用断熱材と屋根用断熱材を配置した様子を示した縦断面図である。
【図２８】家屋に対して外壁用断熱材と天井用断熱材を配置した様子を示した縦断面図である。
【符号の説明】
１……根太用断熱材、２……断熱材ユニット、2a……フック、３……断熱材ユニット、４……吊り材、５……根太、5a……ウェブ、5b……フランジ、5c……リップ、６……床材、７……床用断熱材、８……基礎梁、９……土台、10……端根太、11……端根太用断熱材、12……大引き、13……受け金物、14……受け材、15……外壁用断熱材、16……サイディングボード、17……柱、18……構造用合板、19……下枠ランナー、20……屋根用断熱材、21……野地板、22……垂木、23……天井用断熱材、24……天井根太、25……天井材。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat insulating material for a joist used for a joist of a steel house, a heat insulating structure of a floor in which heat is applied to the joist using a heat insulating material for a joist, and a heat insulating structure of a floor including the heat insulating material for a joist and an entire house. Is.
[0002]
[Prior art and problems to be solved by the invention]
The steel house in which the wood of the panel used in the frame wall construction method is replaced with lightweight steel has advantages such as fire resistance and corrosion resistance that are not found in wooden houses, and also eliminates the need for countermeasures against white ants. Although it can be constructed in the same way as the construction method, it is attracting attention as a new construction method for houses. However, since steel has a higher thermal conductivity than wood, there remains a problem in securing thermal insulation performance.
[0003]
In the same way as in the case of wooden houses on the outer wall, heat insulation is applied to the entire outdoor side of the frame, and on the roof and ceiling surfaces, heat insulation is applied to the entire surface along the rafters and ceiling joists. Performance can be ensured. However, under the floor, heat insulation is ensured by laying a heat insulating material between adjacent joists, so this heat insulating material can prevent heat conduction due to the steel joists touching the outside air under the floor. Can not.
[0004]
In view of the above background, the present invention proposes a heat insulating material suitable for the joist of a steel house and a heat insulating structure of a floor peculiar to the steel house.
[0005]
[Means for Solving the Problems]
Insulation between adjacent joists under the floor is ensured by floor insulation placed between the joists, and the floor insulation covers the outer circumference from the top of the joists to the height of the middle in the height direction of the joists. Therefore, if the heat insulation in the joists is ensured together with the heat insulating material for floors, the heat insulating material for the joists need only be arranged so as to surround at least the outer periphery of the joists.
[0006]
In the present invention, when a molded heat insulating material is used, a single elastic heat insulating material unit molded into a groove-shaped cross section as described in claim 1 or a groove as described in claim 2 is used. Heat insulation for joists surrounds at least the lower outer periphery of joists by blocking the joist and the outside air under the floor by constructing joist insulation from a plurality of heat insulator units combined in a cross-sectional shape. To prevent.
[0007]
Since lip channel steel is used for steel house joists, when using a single insulation unit, the insulation unit can be locked or engaged downward at the lip portion of the joist, or It can be supported on the joist by being adhered to the outer peripheral surface of the plate. For this reason, it is possible to stabilize the heat insulating material unit itself against separation from the joist by supporting the heat insulating material unit with the joist while closing and sandwiching the joist after using the elasticity, and adjacent to the joist. It is also possible to have a function of supporting a floor heat insulating material laid between joists.
[0008]
In the case of using a plurality of heat insulating material units, the adjacent heat insulating material units are stabilized against separation by being supported by the joists while being joined to each other at the lower end position of the joists as described in claim 3. It has a function to support thermal insulation. Or two heat insulating material units located on both sides in the width direction of the joist are connected to each other by a hoisting material that wraps around the upper end of the joist, and are joined to each other at the lower end position of the joist while being joined to each other by the hoisting material. By being supported by suspension, it has the function of ensuring the stability when supported by joists and supporting the floor insulation. In the former case, the plurality of heat insulating material units are supported by the joist while being joined to each other, locked or engaged with the joist, or bonded.
[0009]
When two insulation units located on both sides of the joists are connected by suspension material, the joist insulation material is suspended and supported by the joists. High safety against falling in the state.
[0010]
In the case of using a molded heat insulating material, the floor, in particular, the heat insulation of the joists is performed by surrounding at least the lower outer periphery of the joists with any of the heat insulating materials for joists as described in claim 5. In this case, since the molded heat insulating material unit is used, the installation work to the joists is simplified and the construction efficiency is high.
[0011]
The molded heat insulating material used as a joist heat insulating material is specifically a molded foam plastic plate such as extruded foam polystyrene, bead-type foam polystyrene, foamed polyethylene, foamed polyurethane, and foamed polyisocyanurate. The same applies when the outer wall heat insulating material, the roof heat insulating material, and the ceiling heat insulating material are molded heat insulating materials in addition to the heat insulating material for the edge and the joist.
[0012]
When a fiber-based heat insulating material is used as the heat insulating material for the joist, heat insulation is applied to the joist portion of the floor by wrapping the heat insulating material around at least the lower outer periphery of the joist as described in claim 6, and foaming is performed on site. In the case of using the foamed plastic heat insulating material to be used, heat insulation is applied to the joists by spraying the heat insulating material on at least the lower outer periphery of the joists as described in claim 7.
[0013]
Specific examples of the fiber-based heat insulating material include glass wool, rock wool, and the like, and specific examples of the in-situ foamed plastic-based heat insulating material include foamed polyurethane and foamed polyurea. These fiber-based heat insulating materials and in-situ heat insulating materials are also used for floor heat insulating materials, edge joist heat insulating materials, outer wall heat insulating materials, roof heat insulating materials and ceiling heat insulating materials which will be described later.
[0014]
The thermal insulation of the entire floor is achieved by placing a floor insulation between adjacent joists together with the insulation of the joists as described in claim 8, or under the joists as described in claims 10. This is ensured by placing a floor insulation between adjacent draws.
[0015]
As described above, the floor heat insulating material covers the outer periphery from the top end of the joist to the height of the intermediate portion in the height direction of the joist. Therefore, in the case of claim 8, on the heat insulating material for joist covering the outer periphery of the joist. By arranging the heat insulating material for floors, the contact between the joists and the outside air under the floor is completely blocked by the heat insulating material for joists and the heat insulating material for floors. In this case, in addition to the foamed plastic-based heat insulating material molded into a plate shape, a fiber-based heat insulating material or a foamed plastic-based heat insulating material that is foamed in the field is used.
[0016]
In order to increase the thermal insulation efficiency of the entire floor, the outside air under the floor touches the indoor side surface of the end joist which supports the joist on the foundation beam or on the indoor side of the foundation beam. A heat insulating material for the end joist is also arranged on the indoor side of the end joist. In addition to the foamed plastic heat insulating material molded into a plate shape, a fiber heat insulating material and a foamed plastic heat insulating material that is foamed in the field are also used for the end joist heat insulating material.
[0017]
When the wooden puller that supports the joist is placed under the joist, if the floor insulation is placed between adjacent pullers as described in claim 10, the joist is directly in the outside air under the floor. Since it is placed in a state where it is not touched, the heat insulating property of the floor is ensured without applying heat insulating treatment to the joists. In this case, in addition to the foamed plastic heat insulating material molded into a plate shape, a fiber heat insulating material or a foamed plastic heat insulating material that is foamed on site is used as the floor heat insulating material.
[0018]
The heat insulation of the whole house is arranged by arranging the heat insulating material for the outer wall along the outer wall surface together with any one of the above-mentioned floor heat insulating materials as described in claim 11, and further, the roof surface as described in claim 12. Alternatively, it is ensured by arranging a heat insulating material for roof or a heat insulating material for ceiling along the ceiling surface.
[0019]
In addition to the heat insulating material for outer walls in claim 11, the foam heat insulating material molded into a plate shape for the heat insulating material for roof and the heat insulating material for ceiling in claim 12, a fiber heat insulating material and a foamed plastic system in-situ foam Insulation is used.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
The heat insulating material for joists 1 according to claim 1 is composed of a single heat insulating material unit 2 having a groove-shaped cross section as shown in FIG. 1, and at least the lower side of the joists 5 having a groove-shaped cross section alone. It surrounds the outer periphery of the.
[0021]
Since the joist insulation 1 surrounds the joist 5 from the lower side, as shown in FIGS. 14 and 15, it has a role of supporting the heat insulation 7 for the floor laid on the lower surface of the floor 6. The heat insulating material unit 2 is formed so as to be supported by the joist 5 alone.
[0022]
Since the lip groove steel is used for the joist 5 as shown in FIG. 1 and subsequent figures, the lower side of the joist 5 so that the heat insulating material unit 2 is supported by the joist 5 in a state of surrounding the joist 5 in FIG. A hook 2a that engages downward with the lip 5c is formed at a portion that contacts the lip 5c. One heat insulating material unit 2 is manufactured to have a length over the entire length of the joist 5 or a length obtained by dividing the entire length of the joist 5 into a plurality of pieces.
[0023]
In the case of FIG. 1, when the heat insulating material unit 2 is attached to the joist 5, as shown in (a), the elasticity of the heat insulating material unit 2 itself is used, and the portion that is in contact with the lip 5a to the extent that the hook 2a does not collide with the lip 5c. Insert the heat insulating material unit 2 from the underside of the joist 5 in the state of spreading outward, and restore it when the hook 2a is positioned on the lip 5c, so that the hook 2a engages with the lip 5c as shown in (b) Then, the inner peripheral surface of the heat insulating material unit 2 comes into close contact with the outer peripheral surface of the joist 5 and the attachment to the joist 5 is completed.
[0024]
In the state in which the heat insulating material unit 2 is attached to the joist 5, the centroid of the heat insulating material unit 2 is located closer to the web 5 a of the joist 5 than the contact portion between the hook 2 a and the lip 5 c, so the heat insulating material unit 2 has the hook 2 a. Tries to rotate around the contact area between the lip 5c and the inner peripheral surface of the heat insulating material unit 2 is in close contact with the web 5a, the flange 5b and the lip 5c. Stabilize.
[0025]
In FIG. 1- (c), the height of the portion of the heat insulating material unit 2 that contacts the web 5a and the lip 5c is increased, and the portion where the hook 2a is formed is inserted between the upper and lower lips 5c and 5c. The case where the heat insulating material unit 2 is formed in a shape that is difficult to rotate in the attached state is shown by bringing the formed side into contact with the upper and lower lips 5c, 5c.
[0026]
As shown in FIGS. 11 and 15, when using a foamed plastic-based heat insulating material molded into a plate shape as a floor heat insulating material 7 disposed between adjacent joists 5 and 5, the upper end of the heat insulating material unit 2 is used. The heat insulating material for floor 7 is placed on top, and the heat insulating material unit 2 covers the joists 5 together with the heat insulating material for floors 7, but the heat insulating material unit 2 can be stably attached to the joists 5, so that the heat insulating materials for floors can be obtained. It also has the ability to support the material 7.
[0027]
Adhesive or adhesive is applied to the inner peripheral surface of the thermal insulation unit 2 that is in contact with the joist 5 or the outer peripheral surface of the joist 5, and the joist 5 is exposed to the web 5a and the lip 5c with the portion that is in contact with the web 5a and the lip 5c being spread outward. The heat insulating material unit 2 is supported by the joist 5 alone by inserting the heat insulating material unit 2 from the lower side of the steel plate 5 and adhering it to at least one of the web 5a, flange 5b and lip 5c of the joist 5 In addition, it has the ability to support the floor insulation 7. In that case, it is not always necessary to form the hook 2a at the portion in contact with the lip 5c.
[0028]
The heat insulating material 1 for joist according to claim 2 is composed of a plurality of heat insulating material units 3 and 3 molded into a plate shape or a mountain shape as shown in FIGS. It surrounds at least the lower outer periphery of the joist 5. The heat insulating material unit 3 is also manufactured to have a length over the entire length of the joists 5 or a length obtained by dividing the entire length of the joists 5 into a plurality.
[0029]
As shown in FIGS. 5 to 7, the plurality of adjacent heat insulating material units 3 and 3 are joined together at the lower end position of the joist 5 so as to surround the outer periphery of the joist 5, and to the joist 5 by this joining, Alternatively, as shown in FIG. 2 and FIG. 3, they are supported by being connected to each other by a suspension member 4 that goes around the upper end of the joist 5.
[0030]
The plurality of heat insulating material units 3 and 3 are formed in a groove shape as shown in FIG. 1 within the position below the web 5a of the joist 5 or the width of the flange 5b as shown in FIG. Alternatively, as shown in FIG. 6 and FIG. 7, the lip 5c is at least divided into two at the lower position, and both abutting surfaces are joined to each other in the field.
[0031]
Fig. 5- (a) to (d) and Fig. 6- (a) to (c) show that when the heat insulating material units 3 and 3 are manufactured in two parts, Fig. 7- (a) to (d) shows three parts. In the case of manufacturing, when divided into three parts, it is divided into a part overlapping the web 5a of the joist 5, a part overlapping the lip 5c, and a part overlapping the flange 5b.
[0032]
As shown in Fig. 4- (a) to (c), the concave and convex portions are formed on one abutting surface as shown in Fig. 4- (a) to (c), and the other abutting surface is formed. By forming protrusions and recesses on each other and fitting them together, as shown in (d), by an adhesive or adhesive applied to the abutting surface, or by welding the abutting surface with heat, or alternatively As shown in (e), it is performed by tape or staples straddling both heat insulating units 3 and 3.
[0033]
In the heat insulating material 1 for the joist shown in FIGS. 5 to 7, the heat insulating unit 3 located on the lip 5c side of the two heat insulating units 3 and 3 located on both sides in the width direction of the joist 5 is shown in FIG. If the heat insulating material unit 2 has a hook 2a, or if an adhesive or adhesive is applied to the surface of the heat insulating material unit 3 on the joist 5 side or the outer peripheral surface of the joist 5 The units 3 and 3 are supported by the joists 5 while enclosing the joists 5 by joining, and thus can support the floor heat insulating material 7 without depending on the suspension members 4.
[0034]
2 and 3, a suspension member 4 is installed between the upper ends of two heat insulating material units 3 and 3 located on both sides of the joist 5 in the width direction, and the heat insulating material units 3 and 3 are supported by the joist 5 by the hoisting material 4. An example of the case is shown. When the hanging material 4 is used, the joist heat insulating material 1 may be divided into three parts.
[0035]
As shown in FIG. 2, the suspension member 4 is installed between the edges of the top ends of the heat insulating units 3 and 3 on the joist 5 side or between the outer edges of the joists 5 and extends in the length direction of the heat insulating unit 3. Are arranged in one or several places. In the drawing, the suspension member 4 is installed between the edges of the heat insulating material units 3 and 3 on the joist 5 side, and is bonded or joined to the upper end surfaces of the heat insulating material units 3 and 3. In some cases, the hanger 4 is bonded or bonded to the surface on the 5 side.
[0036]
As shown in FIG. 3- (c), the length between the edges of the joist 5 on the joist 5 side is the width of the joist 5 plus twice the thickness of the floor insulation 7. It becomes size. The material of the suspending material 4 is not particularly limited as long as the floor material 6 laid on the joist 5 does not substantially float from the joist 5. For example, when the suspension material 4 is a ductile material, the length of the span between the edges of the suspension material 4 on the joist 5 side is added to the width of the joist 5 and twice the thickness of the floor heat insulating material 7. If it is slightly smaller than the size, the suspension material 4 is extended by the installation of the floor heat insulating material 7 and is closely attached to the joist 5 to prevent the gap between the heat insulating material units 3 and 3 and the joist 5 from occurring. Can do.
[0037]
The joist insulation 1 shown in FIG. 2 is dropped from the joist 5 with the heat insulation units 3 and 3 opened as shown in FIGS. 3- (a) and (b), as shown in (c). The two butted surfaces are joined to each other so as to surround the joist 5. Since the heat insulating material for joist 1 is supported by the joist 5 by the suspension member 4, the heat insulating material for floor 7 placed on the upper ends of the heat insulating material units 3 and 3 is also supported by the joist 5 by the suspension member 4.
[0038]
FIG. 8 to FIG. 11 show the construction procedure when the joist 5 is covered with any one of the above-mentioned heat insulating materials for joist 1 and the floor is insulated, and FIG. 12 shows the state after the construction. 8 to 12 show a case where a wooden base 9 is placed on the top end of the foundation beam 8, and a light joist steel end joist 10 is fixed on the base 9, and this end joist 10 supports the joist 5. It is an example.
[0039]
As described above, when the joist heat insulating material 1 is composed of a single heat insulating material unit 2, a plurality of heat insulating material units which are installed by being lifted from the lower surface of the joist 5 and connected by the hoisting material 4 as shown in FIG. 8. In the case of 3, as shown in FIG. 3, it is dropped from the joist 5 and installed.
[0040]
As shown in FIGS. 8 and 9, the joist heat insulating material 1 is attached to each joist 5, and the end on the joist 10 side is supported by the joist 10. After the joist heat insulating material 1 is installed, the end joist heat insulating material 11 is disposed between the joists 5 and 5 on the indoor side of the joist 10 as shown in FIG. The end joist heat insulating material 11 is also disposed on the inner peripheral portion of the joist 5 that abuts the end joist 10. The end joist heat insulating material 11 in the inner peripheral portion of the joists 5 is the step shown in FIG. 1 is placed before installation. For the end joist heat insulating material 11, in addition to a foamed plastic heat insulating material molded into a plate shape, a fiber heat insulating material or a foamed plastic heat insulating material foamed in the field is used.
[0041]
After that, as shown in FIG. 11, the floor heat insulating material 7 is dropped and laid between the heat insulating materials 1 and 1 attached to the adjacent joists 5 and 5, and the heat insulating materials 1 and 1 for both joists are installed. Supported. In FIGS. 11 to 15, the heat insulating material for joist 1 is a foamed plastic-based heat insulating material, and the foam is also formed into a plate-like heat insulating material for floor 7 disposed between the joists 5,5. Plastic insulation is used, but floor insulation 7 is foamed plastic insulation that is foamed on-site as shown in Figs. 24 and 25, or fiber insulation as shown in Fig. 26. There is also.
[0042]
FIG. 13 shows a vertical section when the base joist 10 is fixed directly on the base beam 8 without the base 9 on the base beam 8, and FIG. 14 shows the end joist 10 fixed to the indoor side of the base beam 8 with the joist hook. FIG. FIG. 15 is a perspective view of FIG. FIG. 14 also shows a state in which the outer wall heat insulating material 15 of the foamed plastic heat insulating material molded into a plate shape is disposed along the outer wall surface.
[0043]
16 to 26 show examples of floor insulation when the wooden pulling 12 is arranged under the joist 5. In these cases, as shown in FIG. 16, if the floor insulation 7 is placed between the base 9 and the large pull 12 and between the large pulls 12 and 12, the joist 5 should be kept out of direct contact with the outside air under the floor. Therefore, even if the joist 5 is not covered with the joist heat insulating material 1, the heat insulating property of the floor is secured.
[0044]
The floor heat insulating material 7 disposed between the base 9 and the large pull 12 and between the large pulls 12 and 12 is a foamed plastic heat insulating material molded into a plate shape as shown in FIGS. 20 and FIG. 26, and a foamed plastic heat insulating material that foams on-site as shown in FIGS. In the case of a molded foamed plastic heat insulating material, the floor heat insulating material 7 is supported by a receiving metal 13 fixed to a base 9 and a large pull 12 as shown in FIG.
[0045]
After laying the floor heat insulating material 7, the joist 5 is laid on the large pull 12 and the end joists 10 as shown in FIG. 17, and finally the floor material 6 is laid on the joists 5 as shown in FIG. . FIG. 18 also shows a state in which the outer wall heat insulating material 15 of the foamed plastic heat insulating material molded into a plate shape is disposed along the outer wall surface. The molded insulating material 15 for the outer wall of the foamed plastic-based heat insulating material is disposed on the outdoor side of the structural plywood 18 sandwiched between the siding board 16 and the pillar 17.
[0046]
19 and 20 show the case where a fiber-based heat insulating material such as glass wool is laid as the floor heat insulating material 7. In this case, a receiving material 14 for receiving the floor heat insulating material 7 is installed between the adjacent large drawing 12 and the end joist 10 and between the large drawing 12 and 12, and the floor insulating material 7 is laid on the receiving material 14. Is done. 19 and 20 show the case where a fiber-based heat insulating material is also used for the heat insulating material 15 for the outer wall, but the heat insulating material 15 for the outer wall of the fiber heat insulating material is also arranged on the outdoor side of the structural plywood 18.
[0047]
FIG. 21 to FIG. 23 show the case where a foamed plastic heat insulating material such as foamed polyurethane and foamed polyurea which is foamed in the field as the floor heat insulating material 7 is sprayed on the lower end portion of the joist 5 on the large pull 12. In this case, since the floor heat insulating material 7 is foamed plastic foamed in the field, the floor heat insulating material 7 is also sprayed around the joist 5 and serves as the joist heat insulating material 1. Between the large pull 12 and the end joists 10, and between the large pulls 12 and 12, or between the joists 5 and 5, a receiving material 14 is attached to adhere the foam plastic and support the foam plastic.
[0048]
FIG. 22 shows a case where a foamed plastic heat insulating material molded into a plate shape is used as the heat insulating material 15 for the outer wall, and FIG. 23 shows a case where a foamed plastic heat insulating material is sprayed as the heat insulating material 15 for the outer wall. On-site foamed plastic-based insulation 15 is fixed on the indoor side of the structural plywood 18 and on the end joists 10 as shown in FIGS. 21, 23- (a) and (b). Sprayed onto the lower frame runner 19.
[0049]
In FIGS. 24 and 25, foamed plastic heat insulating material foamed in the field is used as the heat insulating material 1 for the joist and the heat insulating material 7 for the floor, and the foamed plastic heat insulating material is sprayed around the joist 5 and the lower surface of the flooring 6. Show the case. FIG. 24 shows a case where an in-situ foamed plastic insulation material is sprayed as the outer wall insulation material 15, and FIG. 25 shows a case where a molded foam plastic insulation material is used.
[0050]
In FIG. 26, a fiber-based heat insulating material is wound around the outer periphery excluding the upper end face of the joist 5 as a heat-insulating material 1 for the joist, and a fiber-based heat insulating material is also used as the heat insulating material 7 for the floor. Shows the case. In FIG. 26, a foamed plastic heat insulating material molded as the outer wall heat insulating material 15 is used.
[0051]
FIG. 27 shows a case where a roof heat insulating material 20 is arranged on the roof surface in addition to the joist heat insulating material 1, the floor heat insulating material 7, and the outer wall heat insulating material 15, and the entire house is insulated. The roof heat insulating material 20 is laid between the base plate 21 and the rafter 22.
[0052]
FIG. 28 shows a case where a ceiling heat insulating material 23 is arranged on the ceiling surface in place of the roof heat insulating material 20 of FIG. The ceiling heat insulating material 23 is laid between the ceiling joists 24 and the ceiling material 25.
[0053]
【The invention's effect】
According to the first to seventh aspects of the present invention, at least the lower outer periphery of the joist is surrounded by the joist heat insulating material and the contact between the joist and the outside air under the floor is cut off, so that heat conduction in the joist can be prevented.
[0054]
In particular, since one or a plurality of molded heat insulating material units are used in claims 1 to 5, the workability of attaching to joists is good and the work efficiency is improved.
[0055]
In claim 4 and claim 5, since the two heat insulating material units located on both sides of the joist width direction are connected to each other by the suspension material, the heat insulating material unit surrounds the joists and supports the heat insulating material for the floor. High safety against falling in a damaged state.
[0056]
According to the eighth aspect, since the heat insulating material for the floor is disposed between the joists together with the heat insulation for the joists according to the first to seventh aspects, the heat insulating property of the entire floor is ensured.
[0057]
According to the ninth aspect of the present invention, the thermal insulation of the entire floor is improved because the thermal insulation material for the edge joist is arranged on the foundation beam or on the indoor side of the edge joist which supports the joist on the indoor side of the foundation beam.
[0058]
In claim 10, when the wooden pulling that supports the joist is placed under the joist, the floor heat insulating material is placed between the adjacent hot pulls so that the joist does not directly touch the outside air under the floor. Therefore, it is not necessary to heat-treat the joists in order to ensure the heat insulation of the floor.
[0059]
In claim 11, in addition to the floor insulation of any one of claims 8 to 10, an outer wall heat insulating material is disposed along the outer wall surface, and in claim 12, a roof heat insulating material or a ceiling is provided on the roof surface or ceiling surface. Since the heat insulating material is disposed, the heat insulation of the entire house is secured.
[Brief description of the drawings]
FIG. 1 (a) is a longitudinal sectional view showing a state in which the heat insulating material for a joist of claim 1 is attached to the joist, (b) is a longitudinal sectional view showing an attached state, and (c) is (b) It is the longitudinal cross-sectional view which showed the modification of these.
FIG. 2 is a perspective view showing a joist heat insulating material according to claims 2 and 4;
FIG. 3 is a longitudinal sectional view showing a procedure for attaching the heat insulating material for joists of FIG. 2 to joists.
FIG. 4 is a longitudinal sectional view showing a joined portion of a heat insulating material unit constituting the heat insulating material for joists according to claim 2;
FIG. 5 is a longitudinal sectional view showing a pattern of a heat insulating material unit when the heat insulating material for joist of claim 2 is divided into two at the lower end position of the joist.
FIG. 6 is a longitudinal sectional view showing a pattern of a heat insulating material unit when the heat insulating material for joist of claim 2 is divided into two near the lip of the joist.
7 is a longitudinal sectional view showing a pattern of a heat insulating material unit when the heat insulating material for joists according to claim 2 is divided into three. FIG.
FIG. 8 is a perspective view showing a state in which a heat insulating material for joists is attached to joists.
FIG. 9 is a perspective view showing a state in which a joist heat insulating material is attached to joists.
FIG. 10 is a perspective view showing a state in which an end joist heat insulating material is attached to the end joist.
FIG. 11 is a perspective view showing a state in which a floor heat insulating material is installed on a joist heat insulating material.
FIG. 12 is a longitudinal sectional view showing a state in which the installation of the floor insulating material is completed.
FIG. 13 is a longitudinal sectional view showing a state in which the installation of the floor insulating material is completed when the end joists are directly fixed to the foundation beam.
FIG. 14 is a longitudinal sectional view showing a state in which the installation of the floor insulating material is completed when the end joists are fixed to the foundation beam as joists.
15 is a perspective view of FIG.
FIG. 16 is a perspective view showing a state in which a floor insulating material is installed on the large pull when the large pull is disposed under the joist.
FIG. 17 is a perspective view showing a state when joists are installed on the large pull.
FIG. 18 is a longitudinal sectional view showing a state after a flooring is laid on the joists.
FIG. 19 is a perspective view showing a modification of FIG.
20 is a longitudinal sectional view of FIG.
FIG. 21 is a perspective view showing a modification of FIG.
22 is a longitudinal sectional view of FIG. 21. FIG.
23A is a longitudinal sectional view showing a modification of FIG. 22, and FIG. 23B is a transverse sectional view of FIG.
24A is a longitudinal sectional view showing a modification of FIG. 22, and FIG. 24B is a transverse sectional view of FIG.
FIG. 25 is a longitudinal sectional view showing a modified example of FIG. 24- (a).
26 is a longitudinal sectional view showing a modified example of FIG. 25. FIG.
FIG. 27 is a longitudinal sectional view showing a state in which the heat insulating material for the outer wall and the heat insulating material for the roof are arranged with respect to the house.
FIG. 28 is a longitudinal sectional view showing a state in which an outer wall heat insulating material and a ceiling heat insulating material are arranged on a house.
[Explanation of symbols]
1 ... Insulation for joists, 2 ... Insulation unit, 2a ... Hook, 3 ... Insulation unit, 4 ... Suspension material, 5 ... joist, 5a ... Web, 5b ... Flange, 5c ... ... Lip, 6 ... Flooring, 7 ... Floor insulation, 8 ... Foundation beam, 9 ... Base, 10 ... End joist, 11 ... End joist, 12 ... Large draw, 13 ...... Receiving hardware, 14 …… Receiver, 15 …… Insulation for outer wall, 16 …… Siding board, 17 …… Column, 18 …… Structural plywood, 19 …… Lower frame runner, 20 …… Insulation for roof Wood, 21 ... field board, 22 ... rafters, 23 ... ceiling insulation, 24 ... ceiling joists, 25 ... ceiling materials.

Claims

Consists insulation material units having one of elasticity is molded in a groove-shaped cross-sectional shape, a joist insulation for the steel house surrounding at least a lower periphery of the joists lightweight shape steel alone, the joists A heat insulating material for joists in a steel house, in which a hook that engages downward with the lip is formed at a portion that contacts the lower lip .

A heat insulating material for a joist in a steel house, which is composed of a plurality of molded heat insulating material units and is combined with a groove-shaped cross-sectional shape to surround at least the lower outer periphery of the joist of a lightweight steel.

The heat insulating material for joists in a steel house according to claim 2, wherein adjacent heat insulating units are joined to each other at the lower end of the joists.

The heat insulating material for a joist in a steel house according to claim 3, wherein the two heat insulating material units located on both sides of the joist in the width direction are connected to each other by a suspension member that goes around the upper end of the joist.

A heat insulating structure for a floor in a steel house in which the heat insulating material for joists according to any one of claims 1 to 4 surrounds at least a lower outer periphery of a joist of a lightweight section steel.

A heat insulating structure of a floor in a steel house in which a fiber-based heat insulation for a joist is wrapped around at least the lower outer periphery of a light-weight steel joist, and the lip is attached to a portion in contact with the lower lip of the joist A heat insulating structure for a floor in a steel house formed with hooks that engage downward .

A heat insulating structure for a floor in a steel house in which a foamed plastic-based thermal insulation material is sprayed on the outer periphery of at least the lower side of the joist of the lightweight section steel, and the lip is in contact with the lower lip of the joist A heat insulating structure for a floor in a steel house, in which a hook that engages downward is formed .

The heat insulating structure for a floor in a steel house according to any one of claims 5 to 7, wherein a heat insulating material for floor is disposed between adjacent joists.

The heat insulating structure for a floor in a steel house according to claim 8, wherein a heat insulating material for edge joists is arranged on the foundation beam or on the indoor side of the edge joists that support the joists on the indoor side of the foundation beam.

A heat insulating structure for a floor in a steel house in which a wooden puller that supports the joist is placed under the joist of a light-weight shaped steel, and a heat insulating material for a floor is placed between the adjacent pullers.

11. A heat insulating structure for a house in a steel house, in addition to any one of claims 8 to 10, wherein a heat insulating material for an outer wall is disposed along the outer wall surface.

12. The heat insulating structure for a house in a steel house according to claim 11, wherein a heat insulating material for roof or a heat insulating material for ceiling is arranged along the roof surface or along the ceiling surface.