【０００１】
【発明の属する技術分野】
この発明は、防火軒天見切り材と、この防火軒天見切り材を取り付けた防火軒天構造と、この防火軒天構造を備えた建物及びこの防火軒天構造に施工する防火軒天の施工方法に関する。
【０００２】
【従来の技術】
従来、防火軒天構造としては、特許文献１や特許文献２に記載されている構造が知られている。
この特許文献１に記載されている防火軒天構造に使用する防火軒天見切り材は、スリット孔を有する天井面とこの天井面が屋外方向に延設された水平取付片と、天井面の両側から下方に垂下した起立面と、この両側の起立面からそれぞれ屋外方向に突出した天井見切り部と壁見切り部とが一体に設けられ、両側の起立面のどちらか一方に体積膨張性不燃材が取り付けられたものである。
【０００３】
この防火軒天見切り材を使用して防火軒天構造にするには、防火軒天見切り材を、壁見切り部の先端を壁に当接させた状態にして、換気通路に挿入し、水平取付片を天井下地材に取り付けた後に、軒天面材を天井下地材に、水平取付片と天井見切り部の間に先端を挿入した状態に、取り付け、外壁面材を壁見切り部の下方の壁に取り付ける。すると、両側の起立面の間からスリット孔を通って小屋裏に通じる換気通路が形成され、火災時には、どちらかの起立面に設けられた体積膨張性不燃材が膨張して換気通路を塞ぐようになっている。
【０００４】
また、特許文献２に記載されている防火軒天構造に使用する防火軒天見切り材は、天井見切り部材と、壁見切り部材と、換気部材の３部材とからなるものであって、天井見切り部材と壁見切り部材には、それぞれ起立面が設けられ、この起立面のどちからに体積膨張性不燃材が設けられ、換気部材にスリット孔が設けられている。
なお、この天井見切り部材は略コ字形をしていて、この略コ字形の上下のフランジがそれぞれ取付片と見切り部となり、ウエッブが起立面となっている。又、壁見切り部材は略Ｓ字形をしていて、上側のフランジが取付片となり、下側のフランジが見切り部となり、下側のウエッブが起立面となっている。
【０００５】
この防火軒天見切り材を使用して防火軒天構造にするには、天井下地材の端部が略Ｓ字形の上側の凹部の中に入り、壁見切り部材の起立面が天井下地材の下方に垂下する状態にして、上側のフランジである取付片を天井下地材の上側面に取り付けて、壁見切り材を天井下地材に取り付ける。又、壁見切り部材の起立面を天井見切り部材の起立面に対峙させて、天井見切り部材を天井下地材の屋内側端部に取り付ける。又、この壁見切り部材の起立面と天井見切り部材の起立面の上に換気部材を取り付ける。その後、天井見切り部材のコ字形の中に軒天面材の端部を挿入した状態にして、軒天面材を天井下地材に取り付ける。
すると、両方の起立面の間からスリット孔を通って小屋裏に通じる換気通路が形成され、火災時には、どちらかの起立面に設けられた体積膨張性不燃材が膨張して換気通路を塞ぐようになっている。
【０００６】
【特許文献１】
特開２００２−１８８２２４号公報
【特許文献２】
特開２００２−１８８２４１号公報
【０００７】
【発明が解決しようとする課題】
この両方の防火軒天構造は、火災時に、体積膨張性不燃材が膨張して通気通路を塞ぐので、防火性能がよく、優れた防火軒天構造であるが、この防火軒天構造に使用する防火軒天見切り材が極めて複雑な形状をしていて、製造し難い。
また、この防火軒天見切り材は外壁面材と軒天面材との間に換気通路がある場合にのみ取り付けることができる。しかし、換気通路には、例えば、軒元の軒天面材に通孔を設けて、この通孔を換気通路にするというように、種々な換気通路があり、かかる換気通路には、この防火軒天見切り材を取り付けることができず、汎用性に劣るという問題がある。
【０００８】
又、通常、防火軒天見切り材は軒天井より短いので、防火軒天見切り材を軒天井の途中で接続する。また、軒天井には、出隅や入隅等があり、この部分で防火軒天見切り材を接続する。このように軒天防火見切り材を接続する必要があるが、前記防火軒天見切り材は複雑な形状をしているために、接続構造が複雑になり施工し難い。
【０００９】
また、この防火軒天構造に施工するには、防火軒天見切り材を天井下地材に取り付けた後に、特許文献１では、軒天面材を天井見切り部と取付片との間に挿入した状態に取り付けるし、特許文献２では天井見切り部材のコ字形の中に軒天面材を挿入した状態に取り付ける。そのために、軒天井を施工するときに防火軒天見切り材を取り付ける必要があるし、取付順序を誤ると、取り付け難くなり、施工し難い。
【００１０】
従って、防火軒天見切り材を変更したい時や、通常の軒天見切り材をこの防火軒天見切り材に変更したいときや、また、万一火災が生じて体積膨張性不燃材が膨張してしまったり、長年月経過して、体積膨張性不燃材が劣化したとき等では、この防火軒天見切り材を交換する必要があるが、かかる場合には、軒天面材や外壁面材を取り外して、施工する必要があり、極めて不便である。
【００１１】
また、最近、工場で建物ユニットや屋根ユニットを製造し、この建物ユニットを施工現場で組み立てたユニット建物が多く建てられている。
そして、このユニット建物に上記防火軒天見切り材を採用しようとすると、このユニット建物は通常軒天井を工場で取り付けているために、防火軒天見切り材も工場で取り付ける必要がある。
しかし、防火見切り材の屋内側端部が壁下地材に当接している構造になっているために、防火軒天見切り材の壁見切り部や壁見切り部材を壁下地材に当接させながら、屋根ユニットを建物ユニットの上に据え付ける必要があり、施工し難い。
【００１２】
特に、特許文献２記載の防火軒天見切り材を、傾斜した軒天井に取り付けるときには、外壁面材に角度調節金物を取り付けていて、この階度調節金物の係止部に壁見切り部材の屋内側端部を係止させる構造になっているために、極めて施工し難い。
また、取付順序が略一定になっているために、建物ユニットを工場で製造するときに、この製造ラインに制約が生じて製造し難い。
従って、ユニット建物では、建物ユニットを据え付けた後に、防火軒天見切り材を取り付けたいという要望がある。
【００１３】
そこで、この発明の目的は、簡単な構造で製造し易く、種々な形状の換気通路を塞ぐことのない状態に取り付けることのできる防火軒天見切り材と、この防火軒天見切り材を軒天井面材や外壁面材を取り付けた後に取り付けたり交換できる防火軒天構造と、この防火軒天構造を備えた建物及びこの防火軒天構造に施工する防火軒天の施工方法を提供することである。
【００１４】
【課題を解決するための手段】
上記課題を解決するために、請求項１に記載の発明は、金属製板材が略Ｌ字形に成形されて、略Ｌ字形の一方の片が見切り片に他方の片が取付片になされ、この見切り片の上面には、体積膨張性不燃材が取り付けられている防火軒天見切り材を特徴とするものである。
【００１５】
請求項１記載の発明における金属製明における金属製板材が変形可能であると、軒天井と外壁面との角度に対応し易いので好ましい。かかる変形可能な金属板材とは、手や簡単な道具で折り曲げて見切り片と取付片との角度を調節できる厚みの金属製板材をいう。この角度を調節できる厚みとは金属の種類によって異なるが、鋼板の場合では、０．２〜１ｍｍの厚みが好ましい。
【００１６】
請求項１記載の発明では、略Ｌ字形の一方の片が見切り片に他方の片が取付片になされているが、この見切り片の先端を若干上方に折曲して水切りにすると、防火軒天見切り材の中に雨水が入り難くなるし、屋外から防火軒天見切り材の内部が見えなく、軒元が美麗になり好ましい。
【００１７】
本発明における体積膨張性不燃材とは、加熱すると膨張する無機物を主成分とするものであって、加熱すると膨張する無機物だけのものや、加熱すると膨張する無機物に合成樹脂やゴム等を混入した組成物や、更に、これ等に無機質充填材や難燃性物質を添加したもの等がある。
加熱すると膨張する無機物としてはバーキュライト、カオリン、マイカ、熱膨張性黒鉛等がある
【００１８】
また、合成樹脂やゴムとしては、ポリプロピレン樹脂、ポリエチレン樹脂等のポリオレフィン樹脂、ポリスチレン樹脂、アクリロニトリル−ブタジエン−スチレン共重合樹脂（ＡＢＳ）、ポリカーボネート樹脂、アクリル樹脂、塩化ビニル系樹脂、エポキシ樹脂、フエノール樹脂、ポリウレンタ樹脂、エチレン−プロピレン−ジエン共重合ゴム（ＥＰＤＭ）、クロロプレンゴム等がある。
特に、エポキシ樹脂が好適である。
【００１９】
また、無機質充填材としては、シリカ、硅藻土、アルミナ、酸化亜鉛、酸化チタン、酸化カルシウム、酸化マグネシウム、酸化鉄、酸化錫、酸化アンチモン、水酸化カルシウム、水酸化マグネシウム、珪酸カルシウム、タルク、クレー、マイカ、モンモリロナイト、ベントナイト、活性白土、セピオライト、木炭粉末、各種金属粉、グラファイト、フライアッシュ、ガラスビーズ、シリカ系バルーン、カーボンブラック、石膏繊維、ガラス繊維、炭素繊維、スラグ繊維、ステンレス繊維等がある。
【００２０】
また、難燃性物質としては、燐酸ナトリウム、燐酸カリウム、燐酸マグネシウム、ポリ燐酸アンモニウム等の燐化合物がある。
かかる体積膨張性不燃材として販売されている商品には、３Ｍ社のクロロプレンゴムとバーキュライトを含有する樹脂組成物のシート（商品名；ファイアバリア）、三井金属塗料社のポリウレタン樹脂と熱膨張性黒鉛を含有する樹脂組成物のシート（商品名；メジヒカット）等がある。
【００２１】
請求項２記載の発明は、請求項１記載の発明に係り、前記体積膨張性不燃材が、火災時の膨張の邪魔にならない防水性シートで覆われているものである。
【００２２】
この請求項２記載の発明に使用する火災時に膨張の邪魔にならない防水性シートとは、防水性がよく、しかも、火災時に体積膨張性不燃材が膨張するときに支障のないシートである。
かかる防水性シートとしては、シート自体が火災時に軟化したり消失する防水性のよいシートや、接着している接着剤や粘着剤が剥がれる等して体積膨張性不燃材の膨張に支障がない防水性のよいシートや、火災時に体積膨張性不燃材の膨張によって簡単に破ける防水性のよいシートがある。具体的には、塩化ビニル樹脂シートや、アルミ箔や、アルミ箔やステンレス箔等の金属箔に加熱されると粘着力がなくなり剥がれ易い粘着剤層を設けた粘着テープ等がある。
【００２３】
請求項３記載の発明は、請求項１記載の発明に係り、前記取付片の取付面には、体積膨張性不燃材が取り付けられているものである。
【００２４】
請求項４記載の発明は、軒天井の軒元には、小屋裏に通じる換気通路が設けられ、この軒天井から若干下方の外壁面材に、請求項１〜３のいずれかに記載されている防火軒天見切り材の取付片が取り付けられて、この防火軒天見切り材の見切り片と軒元との間に小屋裏に通じる換気通路が形成されている防火軒天構造を特徴とするものである。
【００２５】
請求項５記載の発明は、請求項４記載の防火軒天構造が備えられている建物を特徴とするものである。
【００２６】
この請求項５記載の発明における建物とは、木造の建物であってもよいし鉄骨系の建物であってもよいし、コンクリート系の建物であってもよい。又、施工現場で建てる建物であってもよいし、工場で建物ユニットを製造し、これを施工現場で組み立てるユニット建物であってもよい。
【００２７】
請求項６記載の発明は、軒天井の軒元には、小屋裏に通じる換気通路が設けられていて、この軒元から若干下方の外壁面材に、請求項１〜３のいずれかに記載されている防火軒天見切り材の取付片を、見切り片が軒天井の面に対して略平行になる状態に見切り片と取付片との角度を調節して、取り付け、この防火軒天見切りの見切り片と軒天井との間に換気通路を形成する防火軒天の施工方法を特徴とするものである。
【００２８】
この請求項４記載の発明や請求項６記載の発明における換気通路とは、換気のための空気が通過する通路のことであって、種々な形状のものがある。例えば、特許文献１や特許文献２に記載されているように、外壁面材と軒天面材との間に隙間を設けた換気通路もあるし、軒天面材の軒元に通孔を設けて換気通路としたものもある。本発明における換気通路は、これ等の全ての形状の換気通路を含むものである。
【００２９】
（作用）
請求項１記載の発明では、金属製板材が略Ｌ字形に成形されて、略Ｌ字形の一方の片が見切り片に他方の片が取付片になされ、この見切り片の上面には、体積膨張性不燃材が取り付けられている防火軒天見切り材であるので、金属製板材を略Ｌ字形に成形するだけでこの請求項１記載の防火軒天見切り材を製造することができ、極めて製造し易い。
【００３０】
また、軒天井には、略水平なものと、傾斜屋根面の勾配に略平行なものがあるし、又、屋根面の勾配にも種々な傾斜角度があるように、軒天井と外壁面材との角度にも種々なものがある。そして、この金属製板材が変形可能な金属製板材を略Ｌ字形に成形したものであると、この略Ｌ字形の一方の取付片と他方の見切り片との角度を調節することによって、この防火軒天見切り材を取り付けたときに見切り片が換気通路を塞ぐことのないようにすることができる。
【００３１】
また、防火軒天見切り材は簡単な形状であるし、変形可能な薄い金属製板材であるので、防火軒天見切り材を軒天井の途中で接続するときには、防火軒天見切り材の端部を重ねたり、端部を突き合わせ、この上又は下に防火軒天見切り材に沿う状態の接続材を重ねたりして炎が通過しないように接続することができし、入隅部や出隅部で接続するときには、接続部で対称になるように、防火軒天見切り材の端面を略４５°に切断し、この切断面を突き合わせ、この突き合わせ部分に防火軒天見切り材に沿う形状の出隅用や入隅用の接続材を重ねて炎が通過しないように接続することができ、施工し易い。
【００３２】
請求項２記載の発明では、請求項１記載の発明に係り、前記体積膨張性不燃材が、火災時の膨張の邪魔にならない防水性シートで覆われているので、次に示す作用がある。
【００３３】
即ち、一般に体積膨張性不燃材は水を吸収すると、火災時に、膨張し難くなるが、この請求項２記載の発明では、体積膨張性不燃材近傍に雨水や霧状の水滴が付着しても、この防水性シートが雨水や水滴を遮り、体積膨張性不燃材が濡れることがない。従って、火災時には、大きく膨張する性質が失われない。
しかも、火災時に体積膨張性不燃材が膨張する際に、この防水性シートが邪魔にならない。
【００３４】
請求項３記載の発明では、請求項１記載の発明に係り、前記取付片には、取付面に体積膨張性不燃材が取り付けられているので、この防火軒天見切り材の取付片を外壁面材に取り付けると、この取付片と外壁面材との間に体積膨張性不燃材が挟まれる。
通常、外壁面材の表面には外観をよくするために凹凸のある模様を施している。従って、この外壁面材に防火軒天見切り材の取付片を取り付けると、この外壁面材と取付片との間に隙間が生じている場合が多い。
【００３５】
そして、この外壁面材の屋外面を伝って上昇した炎が取付片と外壁面材との間の隙間に入っても、この請求項３記載の発明では、この取付片と外壁との間にある体積膨張性不燃材が膨張して、炎が取付片と外壁との間を遮断し、これ以上、炎が上昇しない。即ち、小屋裏に炎が入らないようになっている。
【００３６】
請求項４記載の発明では、軒天井の軒元には、小屋裏に通じる換気通路が設けられ、この軒元から若干下方の外壁面材に、請求項１〜３のいずれかに記載されている防火軒天見切り材の取付片が取り付けられて、この防火軒天見切りの見切り片と軒天井との間に小屋裏に通じる換気通路が形成されている防火軒天構造であるので、火災時には、体積膨張性不燃材が膨張し、換気通路を塞ぎ、防火性がよい防火軒天構造である。
しかも、この防火軒天見切り材は、軒元から若干下方に取り付ければよく、そのため、軒天井と関係なく、いつでも防火軒天見切り材を取り付けることができ、施工し易い。
【００３７】
また、防火軒天見切り材を変更したい時や、軒天見切り材をこの防火軒天見切り材に変更したいときや、また、万一火災が生じて体積膨張性不燃材が膨張してしまったり、長年月経過して、体積膨張性不燃材が劣化したとき等に、軒天井と関係なく防火軒天見切り材のみを簡単に交換することができる。
また、この防火軒天見切り材をユニット建物に採用しても、工場で軒天井を屋根ユニットに取り付け、施工現場で軒天見切り材を取り付けることができ、施工し易い。
【００３８】
請求項５記載の発明では、請求項４記載の防火軒天構造が備えられている建物であるので、この建物は防火性がよいし、施工し易い。
【００３９】
請求項６記載の発明では、軒天井の軒元には、小屋裏に通じる換気通路が設けられていて、この軒元から若干下方の外壁面材に、請求項１〜３のいずれかに記載されている防火軒天見切り材の取付片を、見切り片が軒天井の面に対して略平行になる状態に見切り片と取付片との角度を調節して、取り付け、この防火軒天見切りの見切り片と軒天井との間に換気通路を形成する防火軒天の施工方法であるので、軒天井と外壁面材との間の角度が種々異なっていても、この異なる角度に見切り片と取付片との角度を調節して、換気通路を確保することができる。しかも、防火軒天見切り材を外壁面材に取り付けるだけであって、軒天井と関係なく取り付けることができ、施工し易い。
【００４０】
また、防火軒天見切り材を変更したい時や、軒天見切り材をこの防火軒天見切り材に変更したいときや、また、万一火災が生じて体積膨張性不燃材が膨張してしまったり、長年月経過して、体積膨張性不燃材が劣化したとき等に、軒天井と関係なく防火軒天見切り材のみを簡単に交換することができる。
また、この防火軒天見切り材をユニット建物に採用しても、工場で軒天井を屋根ユニットに取り付け、軒天見切り材を施工現場で取り付けることができ、施工し易い。
【００４１】
【発明の実施の形態】
以下、本発明の実施の形態を実施例で説明する。
（実施例）
図１〜図６は本発明の一実施例を示すもので、図１は、建物の防火軒天見切り材の取付部分を示す断面図、図２は建物の防火軒天見切り材の接続部分を示す断面図、図３は防火軒天見切り材を示すもので、（イ）は斜視図、（ロ）は正面図、（ハ）は（ロ）のＡ−Ａ線における断面図、（ニ）は平面図、図４は防火軒天見切り材の接続材を示すもので、（イ）は斜視図、（ロ）は正面図、（ハ）は側面図、（ニ）は平面図、図５は出隅部分の防火軒天見切り材を示すもので、（イ）は平面図、（ロ）は正面図、（ハ）は（ロ）のＢ−Ｂ線における断面図、図６は入隅部分の防火軒天見切り材を示すもので、（イ）は平面図、（ロ）は正面図、（ハ）は（ロ）のＣ−Ｃ線における断面図である。
【００４２】
図１〜６において、Ｈは建物であり、この建物Ｈでは、図１及び図２に示すように、建物本体１の上に屋根本体２が設けられている。
なお、図１及び図２では、右側に建物本体１が、又、左側に軒先が示されている。
建物本体１は矩形の四隅に立設された図示しない柱と、この柱の上端部を連結した断面コ字形の鋼製長尺体である天井梁１１と、柱の下端部を連結する図示しない床梁とからなる骨格を備え、この骨格の外側面に外壁パネル３が取り付けられたものである。
【００４３】
この外壁パネル３は、図１及び図２に一部示されているように、四角筒状の鋼製長尺体を枠組された骨格３１の屋外面に硬質木片セメント板の外壁面材３２が取り付けられたものである。
屋根本体２は、図１及び図２に一部示されている屋根梁２１の上に図示しない束が立設され、この束と屋根梁２１に図示しない梁や垂木が架け渡され、この垂木の上に屋根下地材が取り付けられ、この上に屋根材が取り付けられたものであり、軒先にはＬ字形の軒先吊材２３、２４が垂下し、この軒先吊材２３、２４の内側が小屋裏２５となっている。
そして、この軒先吊材２３、２４の下側には軒天井４が取り付けられている。
【００４４】
この軒天井４の構造は、支柱２３の下端に断面Ｌ字形の枠材４１が取り付けられ、この枠材４１に厚みが略０．４ｍｍの塩化ビニル鋼板の軒天面材４２が取り付けられ、この軒天面材４２の上にロックウールの断熱材４３が取り付けられたものである。そして、軒天井４と外壁面材３２の間には隙間が設けられ、この隙間が小屋裏２５に通じる換気通路Ｓとなっている。
また、外壁面材３２には、軒天井４の軒元から若干下方の位置に防火軒天見切り材５が取り付けられて、この防火軒天見切り材５で換気通路Ｓの下方を塞ぎ、火災時に炎が小屋裏２５に入らないようになっている。
【００４５】
この防火軒天見切り材５は、図３に示すように、変形可能な厚み略０．４ｍｍの鋼板が略Ｌ字形に成形され、略Ｌ字形の一方の片が見切り片５１となり、他方の片が取付片５２となっている。
見切り片５１の幅は略６０ｍｍであり、この見切り片５１の先端には略垂直に略７ｍｍ立ち上げられた水切り５３が設けられ、見切り片５１の両端部には通孔５１１が設けられている。
【００４６】
取付片５２は幅が略２８ｍｍであり、先端部の１２ｍｍの部分が屋外方向に折曲されて折曲部５２１となっているし、両端部には通孔５２２が設けられている。
そして、この見切り片５１の上面には厚みが略４．５ｍｍ、幅が略１５ｍｍの体積膨張性不燃材５５が取り付けられ、取付片５２の屋内側面に厚みが略１ｍｍ、幅が略８ｍｍの体積膨張性不燃材５６が取り付けられ、見切り片５１の下面と取付片の屋外面には外壁面材３２と略同じ化粧、例えば、リシン吹きつけ等の化粧が施されている。
【００４７】
このように、防火軒天見切り材５は極めて簡単な構造をしていて、金属製板材を略Ｌ字形に成形するだけで製造でき、極めて製造し易い。
なお、この体積膨張性不燃材５５は見切り片６１の両端から長さ略３０ｍｍの部分には、取り付けられてないし、取付片５２の両端部には、体積膨張性不燃材５６は取り付けられてない。
【００４８】
この防火軒天見切り材５の取付構造は、図１に示すように、防火軒天見切り材５の取付片５２を軒天井４の若干下方の位置の外壁面材３２に押し付けられ、通孔５２２に通されたビス５９で外壁面材３２に取り付けられている。
この防火軒天見切り材５は長さが略９００ｍｍであり、軒天井４より短いので、この防火軒天見切り材５は軒天井の途中で接合材６で別の防火軒天見切り材５に接合されている。
【００４９】
このとき使用する接合材６は、長さが略６０ｍｍで防火軒天見切り材５に沿う構造をしている。
即ち、接合材６は、図４に示すように、厚み略０．４ｍｍの鋼板が略Ｌ字形に成形され、略Ｌ字形の一方の片が見切り片６１となり、他方の片が取付片６２となっている。
見切り片６１は、幅が６０ｍｍであり、先端には略垂直に略７ｍｍ立ち上げられた水切り６３が設けられ、両端部には通孔６１１が設けられている。
【００５０】
取付片６２は、幅が略２８ｍｍであり、両端部には通孔６２２が設けられている。
そして、この見切り片６１の上面には厚みが略４．５ｍｍ幅が略１５ｍｍの体積膨張性不燃材６５が取り付けられ、取付片６２の屋内側面に厚みが略１ｍｍ、幅が略８ｍｍの体積膨張性不燃材６６が取り付けられている。
【００５１】
この接続材６で防火軒天見切り材５を軒天井の途中で接続する構造は、図２に示すように、防火軒天見切り材５の端部が突き合わされ、この突き合わされた両方の端部の体積膨張性不燃材５５が設けられてない場所に、上方から図４に示す接続材６が差し渡され、通孔５１１と通孔６１１に通されたリベット６８で接続材６が防火軒天見切り材５に取り付けられ、通孔５２２と通孔６２２に通されたビス６９で防火軒天見切り材５と接続材６が外壁面材３２に取り付けられている。
また、この防火軒天見切り材５は出隅や入隅でも出隅接合材７や入隅接合材８で接続されている。
【００５２】
このとき使用する出隅接合材７は、第１接合材７１と第２接合材７２とからなる。第１接合材７１は厚み略０．４ｍｍの鋼板が図５に示す形状に切断されたもので、この第１接合材７１の両端部には通孔７１１が設けられ、上面には、厚みが略４．５ｍｍ幅が略１５ｍｍの体積膨張性不燃材７５が取り付けられている。又、第２接合材７２は厚み略１．２ｍｍの鋼板を略直角に折曲した小片であり、この第２接合材７５には通孔７２２が設けられている。
【００５３】
そして、この防火軒天見切り材５の出隅部分の接続構造は、図５に示すように、防火軒天見切り材５の屋外側の先端が４５°の角度になるように、端部が切断され、この防火見切り材５の２個の端部が突き合わせされ、この端部の上に第１接続材７１が架け渡される状態に載せられ、見切り部５１に新たに設けられた通孔５１５と第１接続材に既に設けられている通孔７１１に通されたリベット７８で第１接続材７１が防火軒天見切り材５に取り付けられ、又、防火軒天見切り材５の折曲部５２１に第２接続材７２が重合され、折曲部５２１に設けられた通孔通孔５２５と第２接続材に設けられている通孔７２２に通されたリベット７９で第２接続材７２が防火軒天見切り材５に取り付けられた構造をしている。
【００５４】
また、入隅接合材８は、第１接合材８１と第２接合材８２とからなる。第１接合材７１は厚み略０．４ｍｍの鋼板が図６に示す形状に切断されたもので、この出隅接合材８の両端部には通孔８１１が設けられ、上面には、厚みが略４．５ｍｍ幅が略１５ｍｍの体積膨張性不燃材８５が取り付けられている。又、第２接合材８２は厚み略１．２ｍｍの鋼板を略直角に折曲した小片であり、この第２接合材８２には通孔８２２が設けられている。
【００５５】
そして、この防火軒天見切り材５の入隅部分の接続構造は、図６に示すように、防火軒天見切り材５の屋内側の先端が４５°の角度になるように、端部が切断され、この防火見切り材５の２個の端部が突き合わせされ、この端部の上に第１接続材８１が架け渡される状態に載せられ、通孔５１５と通孔８１１に通されたリベット８８で第２接続材７１が防火軒天見切り材５に取り付けられ、防火軒天見切り材５の折曲部５２１に第２接続材８２を重合し、通孔５２５と通孔８２２に通されたリベット８９で第２接続材８２が防火軒天見切り材５に取り付けられている。
【００５６】
一般に体積膨張性不燃材５５、６５、７５、８５は水を吸収すると、火災時に、膨張し難くなるが、この体積膨張性不燃材５５、６５、７５、８５の表面をアルミニウム箔に粘着剤層が設けられたアルミニウム粘着テープの防水性シートで覆って、この防水性シートで体積膨張性不燃材５５、６５、７５、８５を取り付けると、体積膨張性不燃材近傍に雨水や霧状の水滴が付着しても、この防水性シートが雨水や水滴を遮り、体積膨張性不燃材５５が濡れることがない。従って、加熱されたときに大きく膨張する性質が失われなく好ましい。
【００５７】
しかも、この防水性シートは、火災時に、体積膨張性不燃材５５、６５、７５、８５の膨張によってアルミニウム箔が破けるし、粘着剤が高温になると、剥がれ易いので、体積膨張性不燃材５５、６５、７５、８５の膨張の邪魔にならない。
９は防鳥網であり、図１及び図２に示すように、この防鳥網９は防火軒天見切り材５の屋外側先端部と軒天井４との間に設けられていて、この間から鳥が入って内部に巣等を作ることがないようにしている。
９５はコーキング材であり、このコーキング材９５は防火軒天見切り材５の取付片５２と外壁面材３２との間に注入され、この間を水密にするものである。
【００５８】
次に、この防火用見切り材５の施工方法及び作用について説明する。
先ず、防火軒天見切り材５を取り付けたときに、見切り片５１が軒天井４の面に対して略平行になるように、見切り片５１と取付片５２との角度を調節する。
即ち、軒天井４には、略平行なものと、屋根面の勾配に略平行なものとあるし、屋根面の勾配にも種々な傾斜角度があるように、軒天井４と外壁面材３２との角度にも種々なものがある。しかし、この実施例では、厚みが略０．４ｍｍと薄く、変形可能な鋼板が使用されているので、防火軒天見切り材５を取り付けたときに、見切り片５１が軒天井４の面に対して略平行になるように、取付片５２と見切り片５１との角度を簡単に調節することができるのである。
【００５９】
次に、防火軒天見切り材５の取付片５２を、軒天井４の軒元より若干下方の位置にある外壁面材３２に取り付ける。
このように、見切り片５１を調節して、取付片を換気通路Ｓの下方に取り付けると、予め、見切り片５１が軒天井４の面に対して略平行になるように調節されているので、見切り片５２が換気通路Ｓを塞ぐことがない。
【００６０】
また、防火軒天見切り材５を軒天井４の途中で接続するときには、防火軒天見切り材５の端部を突き合わせ、図２に示すように、この突き合わせた防火軒天見切り材５の体積膨張性不燃材５５のない場所に、上方から図４に示す接続材６を差し渡し、通孔５１１と通孔６１１に通されたリベット６８で両者を接続し、通孔５２２と通孔６２２に通されたビス６９で両者を外壁面材３２に取り付ける。
【００６１】
また、出隅部では、防火軒天見切り材５の屋外側の端部の先端が略４５°の角度になるように切断し、この防火軒天見切り材５の端部に通孔５１５と５２５を設ける。
そして、この防火軒天見切り材５の端部を突き合わせ、この突き合わせ部分の水切り片５１の上に、図５に示すように、第１接続材７１を載せ、通孔５１５と通孔７１１に通されたリベット７８で、第１接続材７１を取り付け、折曲部５２１に第２接続材７２を重合し、この通孔５２５と通孔７２２に通されたリベット７９で第２接続材７５を取り付けて接続する。
【００６２】
また、入隅部では、防火軒天見切り材５の端部を略４５°の角度に切断し、この防火軒天見切り材５の端部に通孔５１５と５２５を設ける。
そして、この防火軒天見切り材５の端部を突き合わせ、この突き合わせ部分の水切り片５１の上に、図６に示すように、第１接続材８１を載せ、通孔５１５と通孔８１１に通されたリベット８８で、第１接続材８１を取り付ける。又、折曲部５２１に第２接続材８２を重合し、この通孔５２５と通孔８２１に通されたリベット８９で第２接続材８２を取り付けて接続する。
【００６３】
このように、防火軒天見切り材５は簡単な構造であり、手や簡単な道具で折曲できるほどの薄い金属製板材であるので、防火軒天見切り材５の端部を端部を突き合わせ、接続材６で接続したり、この防火軒天見切り材５の端面を略４５°の角度に切断し、この切断面を突き合わせて接続材６、出隅用の接続材７や入隅用の接続材８で接続することができる。
最後に、コーキング材９５を防火軒天見切り材５の取付片５２と外壁面材３２の間に注入したり、防鳥網９を防火軒天見切り材５の屋外側先端部と軒天井４との間に設けると防火軒天見切り材５を取り付ける施工は完了する。
【００６４】
このように防火軒天見切り材５を取り付けると、防火軒天見切り材５は軒天井４と関係なく取り付けることができ、施工し易い。
また、防火軒天見切り材５を変更したい時や、軒天見切り材をこの防火軒天見切り材５に変更したいときや、また、万一火災が生じて体積膨張性不燃材が膨張してしまったり、長年月経過して、体積膨張性不燃材が劣化したとき等に、軒天井４と関係なく、防火軒天見切り材５のみを簡単に交換することができ、極めて便利である。
【００６５】
また、この防火軒天見切り材５をユニット建物に採用しても、軒天井４を工場で取り付け、軒天見切り材５を施工現場で取り付けることができ、施工し易い。
このようにして防火軒天見切り材５を取り付けると、防火軒天見切り材５と軒天井４との間から屋根裏に通じる換気通路Ｓが完成する。
そして、火災時には、体積膨張性不燃材５５、６５が膨張して換気通路Ｓを塞ぐので、炎が屋根裏２５に入らず防火性能のよい建物である。
【００６６】
また、取付片５２には、取付面に体積膨張性不燃材５６、６６が取り付けられているので、この防火軒天見切り材の取付片５２が外壁面材３２に取り付けられると、この取付片５２と外壁面材３２との間に体積膨張性不燃材５６、６６が挟まれる。従って、この外壁面材を伝って上昇した炎が外壁面材３２の化粧材の凹凸によって外壁面材３２と取付片との間の隙間に入っても、この取付片５２と外壁面材３２との間にある体積膨張性不燃材５６、６６が膨張して、炎が取付片と外壁との間で遮断され、小屋裏２５に炎が入らない。
【００６７】
【発明の効果】
以上説明してきたように、請求項１に記載の発明は、金属製板材が略Ｌ字形に成形されて、略Ｌ字形の一方の片が見切り片に他方の片が取付片になされ、この見切り片の上面には、体積膨張性不燃材が取り付けられている防火軒天見切り材であるから、金属製板材を略Ｌ字形に成形するだけで製造でき、極めて製造し易いし、防火軒天見切り材を軒天井の途中で接続するときや、入隅部や出隅部で接続するときには、防火軒天見切り材を接続材で簡単に接続することができ、施工し易い。
なお、軒天井と外壁面材との角度にも種々なものがあるが、金属製板材が変形可能であると、取付片と見切り片との角度を調節することによって、取り付けたときに見切り片で換気通路を塞ぐことがないようにすることができる。
【００６８】
請求項２記載の発明は、請求項１記載の発明に係り、前記体積膨張性不燃材が、火災時の膨張の邪魔にならない防水性シートで覆われているから、体積膨張性不燃材近傍に雨水や霧状の水滴が付着しても、この防水性シートが雨水や水滴を遮り、体積膨張性不燃材が濡れることがない。従って、加熱したときに大きく膨張する性質が失われないし、火災時に体積膨張性不燃材が膨張する際に、この防水性シートが邪魔にならない。
【００６９】
請求項３記載の発明は、請求項１記載の発明に係り、前記取付片の取付面には、体積膨張性不燃材が取り付けられているから、外壁面材の表面に凹凸の模様が施されていて、火災時に炎が外壁面材と取付片との間の隙間に入っても、この取付片と外壁との間にある体積膨張性不燃材が膨張して、炎が取付片と外壁との間で遮断され、小屋裏に炎が入らない。
【００７０】
請求項４記載の発明は、軒天井の軒元には、小屋裏に通じる換気通路が設けられ、この軒元から若干下方の外壁面材に、請求項１〜３のいずれかに記載されている防火軒天見切り材の取付片が取り付けられて、この防火軒天見切り材の見切り片と軒天井との間に小屋裏に通じる換気通路が形成されている防火軒天構造であるから、火災時には、体積膨張性不燃材が膨張し、換気通路を塞ぎ、防火性がよい。
【００７１】
しかも、この防火軒天見切り材は、軒元から若干下方に取り付ければよく、そのため、軒天井と関係なく取り付けることができ、施工し易いし、防火軒天見切り材のみを簡単に交換することができ、極めて不便である。
また、この防火軒天見切り材をユニット建物に採用しても、軒天井を工場で取り付け、軒天見切り材を施工現場で取り付けることができ、施工し易い。
【００７２】
請求項５記載の発明は、請求項４記載の防火軒天構造が備えられている建物であるから、この建物は防火性がよいし、施工し易い。
【００７３】
請求項６記載の発明は、軒天井の軒元には、小屋裏に通じる換気通路が設けられていて、この軒元から若干下方の外壁面材に、請求項１〜３のいずれかに記載されている防火軒天見切り材の取付片を、見切り片が軒天井の面に対して略平行になる状態に、見切り片と取付片との角度を調節して取り付けて、この防火軒天見切りの見切り片と軒天井との間に換気通路を形成する防火軒天の施工方法であるから、軒天井と外壁面材とが種々な角度になっていても、取り付けたときに換気通路を塞ぐことがないように取り付けることができるし、軒天と関係なく取り付けることができ、施工し易いし、防火軒天見切り材を簡単に交換することができ、極めて便利である。
また、この防火軒天見切り材をユニット建物に採用しても、軒天井を工場で取り付け、軒天見切り材を施工現場で取り付けることができ、施工し易い。
【図面の簡単な説明】
【図１】本発明の一実施例を示すもので、建物の防火軒天見切り材の取付部分を示す断面図である。
【図２】建物の防火軒天見切り材の接続部分を示す断面図である。
【図３】防火軒天見切り材を示すもので、（イ）は斜視図、（ロ）は正面図、（ハ）は（ロ）のＡ−Ａ線における断面図、（ニ）は平面図である。
【図４】防火軒天見切り材の接続材を示すもので、（イ）は斜視図、（ロ）は正面図、（ハ）は側面図、（ニ）は平面図である。
【図５】出隅部分の防火軒天見切り材を示すもので、（イ）は平面図、（ロ）は正面図、（ハ）は（ロ）のＢ−Ｂ線における断面図である。
【図６】入隅部分の防火軒天見切り材を示すもので、（イ）は平面図、（ロ）は正面図、（ハ）は（ロ）のＣ−Ｃ線における断面図である。
【符号の説明】
Ｈ 建物
Ｓ 換気通路
１ 建物本体
２ 屋根本体
３ 外壁パネル
３２ 外壁面材
４ 軒天井
４２ 軒天面材
５ 防火軒天見切り材
５１ 見切り片
５２ 取付片
５５ 体積膨張性不燃材
５６ 体積膨張性不燃材
６ 接合材
７ 出隅の接合材
８ 入隅の接合材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fire protection eaves cutout material, a fire protection eaves structure to which the fire protection eaves cutout is attached, a building having the fire protection eaves structure, and a method of constructing a fire protection eaves to be installed on the fire protection eaves structure About.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, structures described in Patent Literature 1 and Patent Literature 2 are known as fire eave roof structures.
The fire eave roof cutout material used in the fire eave roof structure described in Patent Document 1 includes a ceiling surface having slit holes, a horizontal mounting piece having the ceiling surface extending in the outdoor direction, and both sides of the ceiling surface. An upright surface that hangs downward from the ceiling, a ceiling parting wall and a wall parting part that protrude in the outdoor direction from the upstanding surfaces on both sides are provided integrally, and a volume-expandable incombustible material is provided on one of the upstanding surfaces on both sides. It is attached.
[0003]
To make a fire-proof eaves structure using this fire-proof eaves, insert the fire-proof eaves in the ventilation passage with the end of the wall parted in contact with the wall, and install it horizontally. After attaching the piece to the ceiling base material, attach the eaves top surface material to the ceiling base material, attach the tip between the horizontal mounting piece and the ceiling parting part, attach the outer wall material to the wall below the wall parting part Attach to Then, a ventilation passage is formed from between the standing surfaces on both sides to the back of the hut through the slit hole, and in the event of a fire, the volume-expandable incombustible material provided on one of the standing surfaces expands to block the ventilation passage. It has become.
[0004]
Further, the fire eave roof cutout material used for the fire eave roof structure described in Patent Literature 2 includes a ceiling parting member, a wall parting member, and a ventilation member, and is a ceiling parting member. The wall parting member is provided with an upright surface, a volume-expandable incombustible material is provided from either of the upright surfaces, and a slit hole is provided in the ventilation member.
The ceiling parting member has a substantially U-shape, and the upper and lower flanges of the substantially U-shape serve as mounting pieces and parting parts, respectively, and the web serves as an upright surface. The wall parting member is substantially S-shaped, with the upper flange serving as a mounting piece, the lower flange serving as a parting part, and the lower web serving as an upright surface.
[0005]
In order to form a fire-proof eaves structure using this fire-proof eaves ceiling material, the edge of the ceiling base material enters into the upper concave portion of the substantially S-shape, and the upright surface of the wall parting member is located below the ceiling base material. Then, the upper flange mounting piece is attached to the upper surface of the ceiling base material, and the wall parting material is attached to the ceiling base material. Also, the upright surface of the wall parting member is opposed to the upright surface of the ceiling parting member, and the ceiling parting member is attached to the indoor side end of the ceiling base material. A ventilation member is mounted on the upright surface of the wall parting member and the upstanding surface of the ceiling parting member. Thereafter, the eave-top material is attached to the ceiling base material with the end of the eave-top material inserted into the U-shape of the ceiling parting member.
Then, a ventilation passage is formed from both upright surfaces to the back of the hut through the slit hole, and in the event of a fire, the volume-expandable incombustible material provided on one of the upright surfaces expands to close the ventilation passage. It has become.
[0006]
[Patent Document 1]
JP-A-2002-188224
[Patent Document 2]
JP-A-2002-188241
[0007]
[Problems to be solved by the invention]
Both fire-proof eaves have excellent fire-protection performance and excellent fire-proof eaves because the volume-expandable incombustible material expands in the event of a fire, blocking the ventilation passages. The fire eaves have a very complicated shape and are difficult to manufacture.
Also, this fire eave roof cutout can be attached only when there is a ventilation passage between the outer wall material and the eave roof material. However, in the ventilation passage, there are various ventilation passages, for example, by providing a through hole in an eave top surface material at the base of the eave, and making the through hole a ventilation passage. There is a problem that the eaves can not be attached and the versatility is poor.
[0008]
Also, since the fire protection eaves are usually shorter than the eaves ceiling, the fire protection eaves are connected in the middle of the eaves ceiling. In addition, the eave ceiling has an outgoing corner, an inset corner, and the like, and a fireproof eaves ceiling cutout is connected at this portion. As described above, it is necessary to connect the eaves sky fire cutout material, but since the fireproof eaves fire cutout material has a complicated shape, the connection structure is complicated and it is difficult to construct.
[0009]
Further, in order to construct the fire-proof eaves ceiling structure, after attaching the fire-proof eaves ceiling cut-off material to the ceiling base material, in Patent Literature 1, the eaves ceiling surface material is inserted between the ceiling cut-off portion and the mounting piece. In Patent Document 2, the eaves ceiling material is inserted in the U-shape of the ceiling parting member. For this reason, it is necessary to attach fireproof eaves ceiling material when constructing the eave ceiling, and if the order of attachment is incorrect, it will be difficult to install and difficult to construct.
[0010]
Therefore, when you want to change the fire eave roof cutout material, or when you want to change the normal eaves skylight cutout material to this fire prevention eave roof cutout material, or if a fire occurs, the volume-expandable incombustible material expands. If the volume-expandable incombustible material has deteriorated after a long period of time, it is necessary to replace the fire-proof eave ceiling material.In such a case, remove the eave surface material and outer wall material. , It is very inconvenient.
[0011]
Recently, many unit buildings have been built in which factories manufacture building units and roof units and assemble these building units at construction sites.
Then, when trying to adopt the above-mentioned fire eave roof cut-off material in this unit building, since this unit building usually has the eave ceiling mounted at the factory, it is necessary to also install the fire prevention eave sky cut-off material at the factory.
However, due to the structure in which the indoor side end of the fire prevention parting material is in contact with the wall base material, the wall part and the wall parting member of the fire protection eave ceiling part are in contact with the wall base material, The roof unit needs to be installed on the building unit, which is difficult to construct.
[0012]
In particular, when the fire protection eaves ceiling material described in Patent Literature 2 is attached to an inclined eave ceiling, an angle adjusting hardware is attached to an outer wall material, and an indoor side of a wall parting member is provided at a locking portion of the floor adjustment hardware. Due to the structure that locks the ends, it is extremely difficult to construct.
Further, since the mounting order is substantially constant, when a building unit is manufactured in a factory, there is a restriction on this manufacturing line, and it is difficult to manufacture.
Therefore, in a unit building, there is a demand to attach a fire-proof eave sky-cut material after the building unit is installed.
[0013]
Therefore, an object of the present invention is to provide a fire-proof eave ceiling material that can be easily manufactured with a simple structure and can be installed in a state that does not block ventilation passages of various shapes, It is an object of the present invention to provide a fireproof eaves structure that can be attached or replaced after a material or an outer wall material is attached, a building having the fireproof eaves structure, and a method for constructing a fireproof eaves to be installed on the fireproof eaves structure.
[0014]
[Means for Solving the Problems]
In order to solve the above problem, the invention according to claim 1 is characterized in that a metal plate is formed into a substantially L-shape, one of the substantially L-shaped pieces is a parting-off piece, and the other piece is a mounting piece. On the upper surface of the cutout piece, a fireproof eaves cutout material to which a volume-expandable incombustible material is attached is featured.
[0015]
It is preferable that the metal plate in the metal lighting according to the first aspect of the invention be deformable, because it can easily correspond to the angle between the eave ceiling and the outer wall surface. Such a deformable metal plate is a metal plate having a thickness that can be adjusted by hand or a simple tool to adjust the angle between the parting piece and the mounting piece. The thickness at which the angle can be adjusted varies depending on the type of metal, but in the case of a steel plate, a thickness of 0.2 to 1 mm is preferable.
[0016]
According to the first aspect of the invention, one of the substantially L-shaped pieces is used as a parting piece and the other piece is used as a mounting piece. This makes it difficult for rainwater to enter into the skylight, and the inside of the fireproof eaves skylight is not visible from outside, and the eaves are beautiful, which is preferable.
[0017]
The volume-expandable incombustible material in the present invention is mainly composed of an inorganic substance which expands when heated, and is composed of only an inorganic substance which expands when heated, or a synthetic resin or rubber mixed with an inorganic substance which expands when heated. There are compositions, and furthermore, those to which an inorganic filler or a flame retardant is added.
Inorganic substances that expand when heated include verculite, kaolin, mica, and heat-expandable graphite
[0018]
Examples of the synthetic resin and rubber include polyolefin resin such as polypropylene resin and polyethylene resin, polystyrene resin, acrylonitrile-butadiene-styrene copolymer resin (ABS), polycarbonate resin, acrylic resin, vinyl chloride resin, epoxy resin, and phenol resin. , Polyurethane resin, ethylene-propylene-diene copolymer rubber (EPDM), chloroprene rubber and the like.
Particularly, an epoxy resin is preferable.
[0019]
As the inorganic filler, silica, diatomaceous earth, alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, calcium hydroxide, magnesium hydroxide, calcium silicate, talc, Clay, mica, montmorillonite, bentonite, activated clay, sepiolite, charcoal powder, various metal powders, graphite, fly ash, glass beads, silica-based balloon, carbon black, gypsum fiber, glass fiber, carbon fiber, slag fiber, stainless steel fiber, etc. There is.
[0020]
Examples of the flame retardant include phosphorus compounds such as sodium phosphate, potassium phosphate, magnesium phosphate, and ammonium polyphosphate.
Products sold as such a volume-expandable incombustible material include a sheet (trade name: Fire Barrier) of a resin composition containing chloroprene rubber and verculite of 3M, a polyurethane resin of Mitsui Kinzoku Co., Ltd. And a sheet (trade name; Medicicut) of a resin composition containing a conductive graphite.
[0021]
The invention according to claim 2 is according to the invention according to claim 1, wherein the volume-expandable incombustible material is covered with a waterproof sheet that does not hinder the expansion in a fire.
[0022]
The waterproof sheet that does not hinder the expansion in the event of a fire used in the invention according to the second aspect is a sheet that has good waterproof properties and does not hinder the expansion of the volume-expandable incombustible material in the event of a fire.
As such a waterproof sheet, a sheet having a good waterproof property, in which the sheet itself softens or disappears in the event of a fire, or a waterproof sheet which does not hinder the expansion of the volume-expandable incombustible material due to peeling off of an adhesive or a sticking adhesive, etc. There is a sheet with good waterproof properties and a sheet with good waterproof properties that can be easily broken by the expansion of the volume-expandable incombustible material in the event of a fire. Specifically, there is a pressure-sensitive adhesive tape provided with a pressure-sensitive adhesive layer which loses its adhesive force when heated on a vinyl chloride resin sheet, an aluminum foil, or a metal foil such as an aluminum foil or a stainless steel foil.
[0023]
A third aspect of the present invention is the invention according to the first aspect, wherein a volume-expandable incombustible material is attached to an attachment surface of the attachment piece.
[0024]
The invention according to claim 4 is characterized in that a ventilation passage leading to the back of the hut is provided at the base of the eave ceiling, and the outer wall material slightly below the eave ceiling is provided with any one of claims 1 to 3. It is characterized by a fire-proof eaves structure in which a mounting piece of the fire-proof eaves is installed, and a ventilation passage leading to the back of the hut is formed between the fire-proof eaves and the eaves. It is.
[0025]
According to a fifth aspect of the present invention, there is provided a building provided with the fire protection eaves structure according to the fourth aspect.
[0026]
The building in the invention according to claim 5 may be a wooden building, a steel-framed building, or a concrete-based building. Further, the building may be a building built at a construction site, or a unit building in which a building unit is manufactured at a factory and assembled at the construction site.
[0027]
In the invention according to claim 6, the eaves of the eave ceiling are provided with a ventilation passage leading to the back of the hut, and the outer wall material slightly below the eaves is provided on the outer wall material. Adjust the angle between the cut-off piece and the mounting piece so that the cut-out piece is substantially parallel to the surface of the eaves ceiling, and attach it. It features a construction method of fire prevention eaves that forms a ventilation passage between the parting piece and the eaves ceiling.
[0028]
The ventilation passage in the invention described in claim 4 and the invention described in claim 6 is a passage through which air for ventilation passes, and has various shapes. For example, as described in Patent Literature 1 and Patent Literature 2, there is a ventilation passage provided with a gap between the outer wall material and the eave surface material, and a through hole is provided at the base of the eave surface material. Some are provided as ventilation passages. The ventilation passage in the present invention includes a ventilation passage of all these shapes.
[0029]
(Action)
According to the first aspect of the present invention, the metal plate is formed into a substantially L-shape, one of the substantially L-shaped pieces serving as a parting piece and the other piece serving as a mounting piece, and the upper surface of the parting piece has a volume expansion. Since it is a fireproof eaves cutout material to which a non-combustible material is attached, the fireproof eaves cutout material according to claim 1 can be manufactured only by forming a metal plate into a substantially L-shape. easy.
[0030]
In addition, there are eave ceilings that are almost horizontal and those that are almost parallel to the slope of the sloping roof surface. There are various angles. When the metal plate is formed by deforming a deformable metal plate into a substantially L-shape, the angle between one mounting piece and the other parting piece of the substantially L-shape is adjusted to prevent this fire prevention. When the eaves are installed, it is possible to prevent the parting pieces from blocking the ventilation passage.
[0031]
In addition, since fire eaves are a simple shape and are deformable thin metal plates, when connecting fire eaves in the middle of the eaves ceiling, the ends of the fire eaves are cut off. It can be connected so that the flame does not pass by stacking or butting the ends, and stacking the connection material along the fire eaves ceiling cut-off material above or below it, so that it can be connected at the entrance corner and out corner When connecting, cut the end face of fireproof eaves cutout to approximately 45 ° so that it is symmetrical at the connection part, butt this cut surface, and fit this abutting part for a protruding corner along the fireproof eaves cutout material And connecting material for corners can be overlapped and connected so that the flame does not pass through, making it easy to construct.
[0032]
According to the second aspect of the present invention, according to the first aspect, the volume-expandable incombustible material is covered with a waterproof sheet that does not hinder the expansion in the event of a fire.
[0033]
That is, in general, when the volume-expandable incombustible material absorbs water, it is difficult to expand at the time of fire, but in the invention according to claim 2, even if rainwater or mist-like water droplets adhere to the vicinity of the volume-expandable incombustible material. However, the waterproof sheet blocks rainwater and water drops, and the volume-expandable incombustible material does not get wet. Therefore, in the event of a fire, the property of greatly expanding is not lost.
In addition, when the volume-expandable incombustible material expands during a fire, the waterproof sheet does not interfere.
[0034]
According to a third aspect of the present invention, in accordance with the first aspect of the present invention, since the volume-expandable incombustible material is mounted on the mounting surface of the mounting piece, the mounting piece of the fireproof eaves ceiling cutout material is attached to the outer wall surface. When attached to the material, a volume-expandable noncombustible material is sandwiched between the mounting piece and the outer wall material.
Usually, the surface of the outer wall material is provided with an uneven pattern to improve the appearance. Therefore, when the mounting piece of the fireproof eaves ceiling cutting material is attached to the outer wall material, a gap is often formed between the outer wall material and the mounting piece.
[0035]
Even if the flame rising along the outdoor surface of the outer wall material enters the gap between the mounting piece and the outer wall material, in the invention according to the third aspect, between the mounting piece and the outer wall, A certain volume-expandable incombustible material expands, and the flame blocks between the mounting piece and the outer wall, and the flame does not rise any further. That is, the flame does not enter the back of the hut.
[0036]
According to the invention described in claim 4, a ventilation passage leading to the back of the hut is provided at the eaves of the eave ceiling, and the outer wall material slightly below the eaves base is provided with an evacuation passage according to any one of claims 1 to 3. It is a fire-proof eaves ceiling structure in which a ventilation passage leading to the back of the hut is formed between the fire-proof eaves skylight cutoff mounting piece and the fireproof eaves skylight cutoff piece and the eave ceiling. In addition, the volume-expandable non-combustible material expands, blocking the ventilation passage, and has a fireproof eaves structure with good fire protection.
In addition, the fire protection eaves can be installed slightly below the eaves base, so that the fire protection eaves can be installed at any time, regardless of the eaves ceiling, and the construction is easy.
[0037]
Also, when you want to change the fireproof eaves top view material, or when you want to change the eaves top view cutout material to this fireproof eaves top view material, or, in the unlikely event of a fire, the volume-expandable incombustible material expands, When the volume-expandable incombustible material has deteriorated after many years, it is possible to easily replace only the fire-protected eaves ceiling material regardless of the eaves ceiling.
Further, even if this fireproof eaves ceiling material is adopted in a unit building, the eaves ceiling can be attached to the roof unit at the factory, and the eaves ceiling material can be attached at the construction site, which facilitates construction.
[0038]
According to the fifth aspect of the present invention, since the building is provided with the fire protection eaves structure according to the fourth aspect, the building has good fire protection and is easy to construct.
[0039]
In the invention according to claim 6, the eaves of the eave ceiling are provided with a ventilation passage leading to the back of the hut, and the outer wall material slightly lower than the eaves is provided in any one of claims 1 to 3. Adjust the angle between the cut-off piece and the mounting piece so that the cut-out piece is substantially parallel to the surface of the eaves ceiling, and attach it. This is a fire protection eaves construction method in which a ventilation passage is formed between the eaves ceiling and the eaves ceiling, so even if the angle between the eaves ceiling and the outer wall material is variously different, By adjusting the angle with the piece, a ventilation passage can be secured. Moreover, fire protection eaves can only be attached to the outer wall material, and can be attached regardless of the eaves ceiling.
[0040]
Also, when you want to change the fireproof eaves top view material, or when you want to change the eaves top view cutout material to this fireproof eaves top view material, or, in the unlikely event of a fire, the volume-expandable incombustible material expands, When the volume-expandable incombustible material has deteriorated after many years, it is possible to easily replace only the fire-protected eaves ceiling material regardless of the eaves ceiling.
In addition, even if this fire protection eaves cutout material is adopted for a unit building, the eaves ceiling can be attached to the roof unit at the factory, and the eaves cutout material can be attached at the construction site, which facilitates construction.
[0041]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to examples.
(Example)
1 to 6 show one embodiment of the present invention. FIG. 1 is a cross-sectional view showing a mounting portion of a fire-proof eave roof cutout of a building, and FIG. FIG. 3 is a cross-sectional view showing a fire eave roof cut-off material, (a) is a perspective view, (b) is a front view, (c) is a cross-sectional view taken along line AA of (b), (d) 4 is a plan view, FIG. 4 shows a connecting material of fire-proof eaves, and (a) is a perspective view, (b) is a front view, (c) is a side view, (d) is a plan view, and FIG. Is a plan view of the fire eaves at the corner, (a) is a plan view, (b) is a front view, (c) is a cross-sectional view taken along the line BB of (b), and FIG. It is a view showing a part of the fire eave roof cut-off material, in which (a) is a plan view, (b) is a front view, and (c) is a cross-sectional view taken along line CC of (b).
[0042]
1 to 6, H is a building. In this building H, a roof main body 2 is provided on a building main body 1 as shown in FIGS.
1 and 2, the building body 1 is shown on the right side, and the eaves are shown on the left side.
The building body 1 has columns (not shown) erected at four corners of a rectangle, a ceiling beam 11 which is a long steel body having a U-shaped cross section connecting the upper ends of the columns, and a not-shown column connecting the lower ends of the columns. The skeleton comprises a floor beam, and the outer wall panel 3 is attached to the outer surface of the skeleton.
[0043]
As shown in FIG. 1 and FIG. 2, the outer wall panel 3 has an outer wall material 32 of a hard wood chip cement plate on an outdoor surface of a skeleton 31 having a rectangular tubular long body framed. It is attached.
The roof main body 2 has a bundle (not shown) erected on a roof beam 21 partially shown in FIGS. 1 and 2, and a beam or rafter (not shown) is laid over the bundle and the roof beam 21. A roof base material is mounted on the eaves, and a roof material is mounted thereon. L-shaped eave hanger members 23 and 24 hang down on the eaves, and the inside of the eave hanger materials 23 and 24 is a hut. It is back 25.
The eave ceiling 4 is attached to the lower side of the eave hanging members 23 and 24.
[0044]
In the structure of the eave ceiling 4, a frame member 41 having an L-shaped cross section is attached to the lower end of the column 23, and an eave ceiling member 42 made of a polyvinyl chloride steel sheet having a thickness of approximately 0.4 mm is attached to the frame member 41. A rock wool heat insulating material 43 is attached on an eaves top surface material 42. Further, a gap is provided between the eaves ceiling 4 and the outer wall material 32, and the gap serves as a ventilation passage S communicating with the cabin back 25.
In addition, a fire-proof eave roof cutoff material 5 is attached to the outer wall material 32 at a position slightly below the eaves of the eave ceiling 4, and the fire-proof eave roof cutoff material 5 is closed under the ventilation passage S so that a fire may occur. The flame is prevented from entering the hut back 25.
[0045]
As shown in FIG. 3, this fire-proof eaves ceiling cutout 5 is formed by deforming a steel plate having a thickness of about 0.4 mm into a substantially L-shape, and one piece of the substantially L-shape becomes a parting piece 51 and the other piece. Are mounting pieces 52.
The width of the parting piece 51 is approximately 60 mm, and a drainer 53 rising approximately 7 mm substantially vertically is provided at the tip of the parting piece 51, and through holes 511 are provided at both ends of the parting piece 51. .
[0046]
The mounting piece 52 has a width of approximately 28 mm, and a 12 mm portion at the tip is bent outward to form a bent portion 521, and through holes 522 are provided at both ends.
A volume-expandable noncombustible material 55 having a thickness of about 4.5 mm and a width of about 15 mm is attached to the upper surface of the parting piece 51, and a volume of about 1 mm and a width of about 8 mm is attached to the indoor side of the mounting piece 52. The inflatable noncombustible material 56 is attached, and the same makeup as the outer wall material 32, for example, makeup such as lysine spraying, is applied to the lower surface of the parting piece 51 and the outdoor surface of the attachment piece.
[0047]
As described above, the fire-proof eaves ceiling cutting material 5 has an extremely simple structure, and can be manufactured only by forming a metal plate material into a substantially L-shape, which is extremely easy to manufacture.
In addition, this volume-expandable incombustible material 55 is not attached to a portion approximately 30 mm in length from both ends of the parting piece 61, and the volume-expandable incombustible material 56 is not attached to both ends of the attachment piece 52. .
[0048]
As shown in FIG. 1, the mounting structure of the fire eave roof cutout 5 is such that the mounting piece 52 of the fire eave roof cutout 5 is pressed against the outer wall material 32 slightly below the eave ceiling 4, and the through hole 522 is formed. Is attached to the outer wall material 32 with a screw 59 passed through.
Since this fire eave roof cutout 5 has a length of about 900 mm and is shorter than the eave ceiling 4, this fire eave roof cutout 5 is joined to another fire eave roof cutout 5 with a bonding material 6 in the middle of the eave ceiling. Have been.
[0049]
The joining material 6 used at this time has a length of approximately 60 mm and has a structure along the fireproof eaves ceiling cutout material 5.
That is, as shown in FIG. 4, the joining material 6 is formed by forming a steel plate having a thickness of about 0.4 mm into a substantially L-shape, and one piece of the substantially L-shape becomes a parting piece 61, and the other piece becomes a mounting piece 62. Has become.
The parting piece 61 has a width of 60 mm, is provided with a drainer 63 rising approximately 7 mm substantially vertically at the tip, and a through hole 611 at both ends.
[0050]
The mounting piece 62 has a width of approximately 28 mm, and has a through hole 622 at both ends.
A volume-expandable noncombustible material 65 having a thickness of approximately 4.5 mm and a width of approximately 15 mm is attached to the upper surface of the parting piece 61, and a volume expansion of approximately 1 mm and a width of approximately 8 mm is attached to the indoor side surface of the mounting piece 62. A non-combustible material 66 is attached.
[0051]
As shown in FIG. 2, a structure in which the fireproof eaves ceiling cutoff material 5 is connected in the middle of the eaves ceiling by this connection member 6 is such that the ends of the fireproof eaves rooftop cutouts 5 abut against each other, and the two abutted ends. 4 is inserted from above into a place where the volume-expandable non-combustible material 55 is not provided, and the connecting material 6 is pierced by the through holes 511 and the rivets 68 passed through the through holes 611. The fire-proof eaves ceiling parting member 5 and the connecting member 6 are attached to the outer wall member 32 by screws 69 which are attached to the parting member 5 and passed through the through holes 522 and 622.
Further, the fireproof eaves ceiling cutout 5 is connected to the outside corner and the inside corner by the outside corner joining material 7 and the inside corner joining material 8.
[0052]
The protruding corner joining material 7 used at this time includes a first joining material 71 and a second joining material 72. The first bonding material 71 is a steel plate having a thickness of approximately 0.4 mm cut into a shape shown in FIG. 5. Through holes 711 are provided at both ends of the first bonding material 71, and the thickness is formed on the upper surface. A volume-expandable noncombustible material 75 having a width of about 4.5 mm and a width of about 15 mm is attached. The second bonding material 72 is a small piece obtained by bending a steel plate having a thickness of approximately 1.2 mm at a substantially right angle. The second bonding material 75 has a through hole 722.
[0053]
Then, as shown in FIG. 5, the connection structure of the protruding corner portion of the fire eave roof cutout 5 is cut so that the outdoor end of the fire eave roof cutout 5 has an angle of 45 °. Then, the two ends of the fire prevention parting material 5 are abutted with each other, and the first connection member 71 is placed on the end part so as to be bridged therebetween, and a through hole 515 newly provided in the parting part 51 is formed. The first connection member 71 is attached to the fire protection eaves sky-cut material 5 with the rivets 78 passed through the through holes 711 already provided in the first connection material. The second connection member 72 is superimposed, and the second connection member 72 is formed by the rivet 79 passed through the through hole 525 provided in the bent portion 521 and the through hole 722 provided in the second connection material. It has a structure attached to the skylight 5.
[0054]
The corner joining material 8 includes a first joining material 81 and a second joining material 82. The first bonding material 71 is a steel plate having a thickness of about 0.4 mm cut into the shape shown in FIG. 6, through-holes 811 are provided at both ends of the corner bonding material 8, and the upper surface has a thickness of A volume-expandable noncombustible material 85 having a width of about 4.5 mm and a width of about 15 mm is attached. The second bonding material 82 is a small piece obtained by bending a steel plate having a thickness of approximately 1.2 mm at a substantially right angle, and the second bonding material 82 is provided with a through hole 822.
[0055]
Then, as shown in FIG. 6, the connection structure of the corner portion of the fireproof eaves ceiling cutout 5 is cut such that the tip of the indoor side of the fireproof eaves topview cutout 5 has a 45 ° angle. Then, the two ends of the fire prevention parting material 5 are butted against each other, and the first connecting member 81 is placed on the end so that the first connection member 81 is bridged therebetween, and the rivets 88 passed through the through holes 515 and 811. Then, the second connecting member 71 is attached to the fire protection eaves cutout material 5, the second connection material 82 is superimposed on the bent portion 521 of the fireproof eaves cutout material 5, and the rivets passed through the through holes 525 and 822. At 89, the second connecting member 82 is attached to the fireproof eaves ceiling cutout material 5.
[0056]
In general, when the volume-expandable incombustible materials 55, 65, 75, and 85 absorb water, it is difficult to expand in the event of a fire. However, the surface of the volume-expandable incombustible materials 55, 65, 75, and 85 is coated on an aluminum foil with an adhesive layer. Is covered with a waterproof sheet of aluminum adhesive tape provided with, and when the volume-expandable incombustible materials 55, 65, 75, and 85 are attached with the waterproof sheet, rainwater or mist-like water droplets are generated near the volume-expandable incombustible material. Even if it adheres, the waterproof sheet blocks rainwater and water drops, and the volume-expandable noncombustible material 55 does not get wet. Therefore, it is preferable that the property of expanding greatly when heated is not lost.
[0057]
In addition, since the aluminum foil is torn by the expansion of the volume-expandable incombustible materials 55, 65, 75, and 85 at the time of fire, and easily peeled off when the pressure of the adhesive becomes high, the volume-expandable incombustible material 55 , 65, 75, 85 do not interfere with the expansion.
Reference numeral 9 denotes a bird net, and as shown in FIGS. 1 and 2, the bird net 9 is provided between the outdoor end of the fire-proof eaves ceiling cutout 5 and the eave ceiling 4. Birds do not enter and create nests inside.
Reference numeral 95 denotes a caulking material. The caulking material 95 is injected between the mounting piece 52 of the fireproof eaves ceiling cutout material 5 and the outer wall material 32 to make the space between the mounting pieces 52 watertight.
[0058]
Next, the construction method and operation of the fire prevention parting material 5 will be described.
First, the angle between the parting piece 51 and the mounting piece 52 is adjusted such that the parting piece 51 is substantially parallel to the surface of the eaves ceiling 4 when the fire protection eaves ceiling piece 5 is attached.
That is, the eaves ceiling 4 is substantially parallel to the eaves ceiling 4 and substantially parallel to the slope of the roof surface, and the eaves ceiling 4 and the outer wall material 32 are arranged so that the slope of the roof surface has various inclination angles. There are various angles. However, in this embodiment, since a thin and deformable steel plate having a thickness of approximately 0.4 mm is used, when the fireproof eaves ceiling cutout member 5 is attached, the parting strip 51 is placed on the surface of the eaves ceiling 4. Thus, the angle between the mounting piece 52 and the parting piece 51 can be easily adjusted so as to be substantially parallel.
[0059]
Next, the attachment piece 52 of the fireproof eaves ceiling cutout 5 is attached to the outer wall material 32 slightly below the base of the eaves ceiling 4.
As described above, when the parting piece 51 is adjusted and the mounting piece is attached below the ventilation passage S, the parting piece 51 is adjusted in advance so as to be substantially parallel to the surface of the eaves ceiling 4. The parting piece 52 does not block the ventilation passage S.
[0060]
Further, when the fireproof eaves ceiling material 5 is connected in the middle of the eaves ceiling 4, the ends of the fireproof eaves skylight 5 are abutted to each other, and as shown in FIG. The connecting material 6 shown in FIG. 4 is inserted from above into a place where there is no incombustible material 55, and the two are connected by the rivets 68 passed through the through holes 511 and 611, and are passed through the through holes 522 and 622. Both are attached to the outer wall material 32 with the screw 69.
[0061]
Further, at the protruding corner, the tip of the outdoor side end of the fireproof eaves cutout 5 is cut so as to have an angle of about 45 °, and through holes 515 and 525 are formed in the end of the fireproof eaves cutout 5. Is provided.
Then, as shown in FIG. 5, the first connecting member 71 is placed on the drain piece 51 at the butted portion, and the through-hole 515 and the through-hole 711 are passed through. The first connecting member 71 is attached with the set rivet 78, the second connecting member 72 is overlapped on the bent portion 521, and the second connecting member 75 is attached with the rivet 79 passed through the through hole 525 and the through hole 722. Connect.
[0062]
At the corner, the end of the fire protection eaves cutout 5 is cut at an angle of approximately 45 °, and through holes 515 and 525 are provided at the end of the fireproof eaves cutout 5.
Then, as shown in FIG. 6, the first connecting member 81 is placed on the water-drain piece 51 at the end of the fire protection eaves, and the first connection member 81 is passed through the through holes 515 and 811. The first connecting member 81 is attached with the set rivet 88. Also, the second connecting member 82 is overlapped on the bent portion 521, and the second connecting member 82 is attached and connected with the through holes 525 and the rivets 89 passed through the through holes 821.
[0063]
As described above, since the fire protection eaves cutout 5 has a simple structure and is a thin metal plate material that can be bent by hand or a simple tool, the ends of the fire protection eaves cutout 5 are joined to each other. , Or by cutting the end face of the fire-proof eaves ceiling cut-off material 5 at an angle of approximately 45 °, and abutting the cut surfaces to connect the connection material 6, the connection material 7 for the outgoing corner, and the connection material 7 for the in-corner. The connection can be made with the connection member 8.
Finally, a caulking material 95 is injected between the mounting piece 52 of the fireproof eaves cutout 5 and the outer wall material 32, and a bird net 9 is connected to the outdoor end of the fireproof eaves cutout 5 and the eaves ceiling 4. When it is provided between the two, the work of attaching the fireproof eaves cutout material 5 is completed.
[0064]
When the fire protection eaves top view material 5 is attached in this manner, the fire prevention eaves top view cut material 5 can be attached irrespective of the eaves ceiling 4, and the construction is easy.
Also, when it is desired to change the fireproof eaves facing material 5 or to change the eaves facing material to the fireproof eaves facing material 5, or when a fire occurs and the volume-expandable incombustible material expands. When the volume-expandable non-combustible material has deteriorated after a long period of time or the like, the fire-prevention eaves top view material 5 alone can be easily replaced regardless of the eaves ceiling 4, which is extremely convenient.
[0065]
Further, even if this fire protection eaves ceiling material 5 is employed in a unit building, the eaves ceiling 4 can be attached at a factory and the eaves ceiling material 5 can be attached at a construction site, which facilitates construction.
When the fireproof eaves skyrocketing material 5 is attached in this way, a ventilation passage S leading from the space between the fireproof eaves skylighting material 5 and the eave ceiling 4 to the attic is completed.
Then, in the event of a fire, the volume-expandable incombustible materials 55 and 65 expand and block the ventilation passage S, so that the fire does not enter the attic 25 and the building has good fire prevention performance.
[0066]
Since the mounting pieces 52 have the volume-expandable incombustible materials 56 and 66 mounted on the mounting surface, when the mounting pieces 52 of the fireproof eaves ceiling cutout material are mounted on the outer wall material 32, the mounting pieces 52 are mounted. The volume-expandable noncombustible materials 56 and 66 are sandwiched between the outer wall material 32 and the outer wall material 32. Therefore, even if the flame rising along the outer wall material enters the gap between the outer wall material 32 and the mounting piece due to the unevenness of the decorative material of the outer wall material 32, the mounting piece 52 and the outer wall material 32 The volume-expandable incombustible materials 56 and 66 located therebetween expand, the flame is cut off between the mounting piece and the outer wall, and the flame does not enter the cabin back 25.
[0067]
【The invention's effect】
As described above, according to the first aspect of the present invention, a metal plate is formed into a substantially L-shape, and one side of the substantially L-shape is formed as a parting piece and the other piece is formed as a mounting piece. On the upper surface of the piece is a fire eave roof cutout with a volume-expandable incombustible material attached, so it can be manufactured simply by forming a metal plate material into an approximately L-shape, making it extremely easy to manufacture and a fire eave roof cutout When connecting materials in the middle of the eaves ceiling, or connecting at the corners inside or outside the corners, the fireproof eaves can be easily connected with the connecting material, and the construction is easy.
Note that there are various angles between the eave ceiling and the outer wall material, but if the metal plate material is deformable, the angle between the mounting piece and the parting piece is adjusted so that the parting piece can be cut when mounted. Can prevent the ventilation passage from being blocked.
[0068]
The invention according to claim 2 is directed to the invention according to claim 1, wherein the volume-expandable incombustible material is covered with a waterproof sheet that does not hinder the expansion in the event of a fire. Even if rainwater or mist-like water droplets adhere, the waterproof sheet blocks the rainwater or water droplets, and the volume-expandable incombustible material does not get wet. Therefore, the property of expanding greatly when heated is not lost, and the waterproof sheet does not hinder the expansion of the volume-expandable incombustible material during a fire.
[0069]
According to a third aspect of the present invention, in accordance with the first aspect of the present invention, since a volume-expandable non-combustible material is mounted on the mounting surface of the mounting piece, an uneven pattern is formed on the surface of the outer wall material. Even if the flame enters the gap between the outer wall material and the mounting piece in the event of a fire, the volume-expandable incombustible material between the mounting piece and the outer wall expands, causing the flame to move between the mounting piece and the outer wall. It is cut off between the huts, and no flame enters the back of the hut.
[0070]
In the invention according to claim 4, a ventilation passage leading to the back of the hut is provided at the base of the eave ceiling, and the outer wall material slightly below the base of the eave is described in any one of claims 1 to 3. The fire protection eaves are constructed with a ventilation eaves that connects to the roof of the cabin between the fire eaves and the ceiling of the eaves. Occasionally, the volume-expandable incombustible material expands, blocking the ventilation passage and providing good fire protection.
[0071]
What's more, this fire eave roof cut-off material only needs to be installed slightly below the eaves base, so it can be installed regardless of the eaves ceiling, it is easy to install, and it is easy to replace only fire eaves roof cut-out material Yes, very inconvenient.
In addition, even if this fire protection eaves cutout material is adopted for a unit building, the eaves ceiling can be attached at the factory and the eaves cutout material can be attached at the construction site, which facilitates construction.
[0072]
The invention according to claim 5 is a building provided with the fire protection eaves structure according to claim 4, so that this building has good fire protection and is easy to construct.
[0073]
In the invention according to claim 6, the eaves of the eave ceiling are provided with a ventilation passage leading to the back of the hut, and the outer wall material slightly below the eaves is provided on the outer wall material. Adjust the angle between the cut-off piece and the mounting piece so that the cut-out piece is approximately parallel to the surface of the eaves ceiling, This is a fire protection eaves construction method that forms a ventilation passage between the parting piece and the eave ceiling, so even if the eave ceiling and the outer wall material are at various angles, the ventilation passage will be closed when installed It is very convenient because it can be installed without any trouble and can be installed independently of the eaves. It is easy to construct and the fire protection eaves can be easily replaced.
In addition, even if this fire protection eaves cutout material is adopted for a unit building, the eaves ceiling can be attached at the factory and the eaves cutout material can be attached at the construction site, which facilitates construction.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing one embodiment of the present invention and showing a mounting portion of a fire eave ceiling cutout material of a building.
FIG. 2 is a cross-sectional view showing a connection portion of a fire-proof eave ceiling cutout of a building.
3A and 3B show a fire eave roof cutout material, wherein FIG. 3A is a perspective view, FIG. 3B is a front view, FIG. 3C is a cross-sectional view taken along line AA in FIG. 3B, and FIG. It is.
FIGS. 4A and 4B show connecting members of a fireproof eaves ceiling cutting material, wherein FIG. 4A is a perspective view, FIG. 4B is a front view, FIG. 4C is a side view, and FIG.
FIGS. 5A and 5B show a fireproof eaves ceiling cut-off material at a protruding corner, wherein FIG. 5A is a plan view, FIG. 5B is a front view, and FIG.
FIGS. 6A and 6B are views showing a fire eave ceiling cut-off material at an inner corner, wherein FIG. 6A is a plan view, FIG. 6B is a front view, and FIG. 6C is a cross-sectional view taken along line CC of FIG.
[Explanation of symbols]
H building
S ventilation path
1 Building body
2 Roof body
3 Exterior wall panels
32 Exterior wall material
4 eave ceiling
42 eaves top
5 Fireproof eaves sky cutting material
51 Closing Piece
52 Mounting piece
55 Volume expandable noncombustible material
56 Volume-expandable incombustible material
6 joining materials
7 Outer corner joining material
8 Joining material in the corner
