JP3751575B2

JP3751575B2 - Underfloor insulation fitting

Info

Publication number: JP3751575B2
Application number: JP2002129058A
Authority: JP
Inventors: 正喜白岩; 智広渡邉; 直行古田
Original assignee: Nitto Boseki Co Ltd
Current assignee: Nitto Boseki Co Ltd
Priority date: 2002-04-30
Filing date: 2002-04-30
Publication date: 2006-03-01
Anticipated expiration: 2022-04-30
Also published as: JP2003321929A

Description

【０００１】
【発明の属する技術分野】
本発明は、床下に断熱材を取り付けるために使用する取付具に関する。
【０００２】
【従来の技術】
通商産業省、建設省の告示第２号及び建設省告示第４５１号には住宅に係るエネルギーの使用の合理化に関する建設主の判断の基準及び住宅に係るエネルギーの使用の合理化に関する設計及び施工の指針として、屋根又は天井、壁、床の断熱の基準又は指針が示されており、これらに基づいて、住宅の断熱が施工されている。そして、住宅等の床下の断熱施工において、大引き等の床構造体の間に、グラスウール等の板状の無機質繊維製断熱材を配置することが行われている。
【０００３】
一般に、住宅の床は、図１１に示すように、基礎１の上、或いは床下柱２の上に適当な間隔を開けて水平に大引き３を配置し、その上に根太４を並べ、その根太４の上に床材（図示せず）を配置する構造となっており、大引き３、３の間に断熱材を配置している。そして、大引き３、３の間に断熱材を配置するには、図１２（ａ）に示すように、大引き３、３の互いに向かい合った側面３ａ、３ａに、木材或いは金属製の受け材６を固定し、その上に断熱材７を保持させる方法を採っていた。しかしながら、この方法では、受け材６、６を、向かい合った大引き３、３の側面３ａ、３ａの同じ高さの位置に固定しなければならず作業が面倒であり、しかも、断熱材７はその両側縁のみが受け材６で支持されるため、断熱材の中央部が自重によって垂れ下がることがあり、このため、床板との間に大きい空隙が生じ、断熱欠損や結露が発生するという問題があった。
【０００４】
また、受け材６、６を用いる代わりに、図１２（ｂ）に示すように、断熱材７の両側縁の下側を切り欠いて、断熱材７自体に取付部７ａを形成し、その取付部７ａ、７ａを大引き３、３の上に乗せ、他の部分を大引き３、３の間に嵌め込むことで取り付ける方法が特許第３０２４７１６号公報に提案されている。しかし、この方法では断熱材７の両側縁を切り欠く作業を必要とし、また、断熱材７の中央部が自重により垂れ下がり、断熱欠損や結露が発生するという問題もあった。
【０００５】
そこで、断熱材の中央部の垂れ下がりを防止するため、図１３（ａ）に示すように、断熱材を支持する受け部９ａと、その両端に直角方向の上向きに延設された壁部９ｂ、９ｂと、その上端に直角方向の外向きに延設された支持部９ｃ、９ｃを備えた受け材９を用い、図１３（ｂ）に示すように、その受け材９を大引き３、３の間に橋のように渡し、その受け部９ａで断熱材７を支持することが実用新案登録第３００８１８８号公報に提案されている。しかしながら、この受け材９は一体構造であるため、組み立て寸法誤差の生じがちな大引き３、３の間に支障なく取り付けることができるようにするには、受け材９の受け部９ａの長さを、大引き３、３の内法寸法よりもかなり小さく設定しておく必要があり、このため、受け材９を大引き３、３に取り付けた時、大引き３の側面３ａと受け材９の壁部９ｂとの間にかなりの隙間が生じることが多く、この隙間のため、断熱材７と大引き３との間にも隙間が生じ、断熱欠損や結露が発生するという問題があった。また、受け材９は、大引き３、３に橋を渡すような形態で固定されるため、一旦取り付けてしまうと、これを簡単には取り外すことができず、大引き３、３の間を作業者が移動する際に受け部９ａに足を引っかけることがあり、作業性を悪くする場合がある。また、受け材９は、長い受け部９ａとその両端の壁部９ｂ、９ｂや支持部９ｃ、９ｃが一体化されているため、全体の形状が複雑になり、また寸法も大きくなるため、受け材の製造コストが高くなり、輸送性、取り扱い性においても不都合があるといった問題もあった。
【０００６】
【発明が解決しようとする課題】
本発明は係る従来の問題点に鑑みてなされたもので、一対の大引き３、３のような角材状の床構造体の間に、断熱材を、垂れ下がりを防止した状態に取り付けることを可能とする構造簡単で、低コストの、且つ輸送性や取り扱い性に優れ、現場での作業性のよい床下用断熱材の取付具を提供することを課題とする。
【０００７】
【課題を解決するための手段】
本発明に係る床下用断熱材の取付具は、大引き等の間隔をあけて水平に配置されている角材状の床構造体の向かい合った位置に取り付けられる一対のハンガー材であって、それぞれが、前記床構造体の上面に乗せる支持部と、該支持部の一端から直角方向の下方に延びる壁部と、該壁部の下端からほぼ直角方向に且つ前記支持部とは反対側に延びる受け部とを備えた一対のハンガー材と、前記床構造体に取り付けられた前記一対のハンガー材の受け部に両端を保持させる形態で取り付けられ、断熱材を支持する支持材であって、少なくとも両端にハンガー材からの落下防止用のリブを備えた支持材とで構成したものである。この構成により、ハンガー材を床構造体に固定し、そのハンガー材に支持材を乗せ、その支持材の上に断熱材を乗せることで、支持材で断熱材の全幅を支持することができ、断熱材の中央部の垂れ下がりを防止して断熱欠損や結露の発生を無くすことができる。また、取付具が一対のハンガー材と、それとは別個の部品である支持材とで構成されるため、それぞれの部品を小さくでき、低コストで製造できると共に輸送や取り扱い、現場施工等が容易であり、しかも、床構造体の間隔に多少の誤差があっても支障なく取り付けることができる。更に、床構造体に取り付けた後においても、支持材を一対のハンガー材から容易に取り外すことができるので、床構造体の間を作業者が歩く必要が生じた時にも、足を引っかけるということがなく、現場作業を容易に行うことができる。
【０００８】
ここで、前記支持材には、そのほぼ全長に渡ってたわみ防止用のリブを設けておくことが好ましい。このたわみ防止用のリブは、落下防止用のリブとは別個に設けても良いが、支持材の構造をより簡素化し、単重を軽くし、製造しやすい形状とするには、落下防止用のリブとたわみ防止用のリブとを一体としておくことがより好ましい。このようなたわみ防止用のリブを設けておくと、曲げ剛性をきわめて大きくでき、断熱材の中央部の垂れ下がりを一層防止して断熱欠損や結露の発生を無くすことができる。
【０００９】
また、前記したハンガー材の受け部に、支持材に設けている落下防止用のリブを挿入させるスリットを形成しておくことが好ましく、その構成とすると、支持材の落下防止用のリブを受け部のスリットに挿入させて取り付けることで支持材が受け部からずれることがなく、簡単な作業でハンガー材に支持材を脱落しないように保持させることができる。
【００１０】
本発明に使用する支持材は、少なくもと両端に落下防止用のリブを有するものであれば、その構造は任意であるが、長さ方向に一定断面の形材を用いることが、所望長さの支持材を低コストで製造でき、また、現場にて必要に応じ、所望長さに切断して長さ調整を容易に行うこともできるので好ましい。更には、支持材を、断熱材を支持するための水平な支持板部と、その下面の中央に下方に延びるリブとを有する断面Ｔ字型の形材で構成することが、簡単な構造であるので低コストで製造でき且つ断熱材を支持するための広い支持面を備えているので、一層好ましい。
【００１１】
前記したハンガー材の支持部先端には、床構造体に突き刺すための爪を形成しておくことが好ましい。この構成とすると、その爪を床構造体に突き刺すことで、ハンガー材を床構造体に固定でき、ハンガー材の取り付け作業を容易に行うことができる。
【００１２】
【発明の実施の形態】
以下、図面の実施の形態を参照して本発明を更に詳細に説明する。図１（ａ）は、本発明の好適な実施の形態に係る取付具を用いて、一対の床構造体の間に断熱材を取り付けた構造を示す概略断面図、図１（ｂ）はその概略平面図、図２（ａ）、（ｂ）、（ｃ）、（ｄ）は施工手順を示す概略斜視図である。図１、図２において、３、３は一対の角材状の床構造体であり、この例では大引きである。７は、一対の大引き３、３の間に取り付けられたガラスウール、ロックウール等の板状の断熱材、１１は本発明の実施の形態に係る取付具である。取付具１１は、大引き３、３にそれぞれ取り付けるための一対のハンガー材１２と、その一対のハンガー材１２に両端を保持させる形態で取り付けられる支持材１３で構成されている。
【００１３】
ハンガー材１２は、図３に示すように、大引き３の上面に乗せる支持部１２ａと、その支持部１２ａの一端から直角方向の下方に延びる壁部１２ｂと、その壁部１２ｂの下端からほぼ直角方向に且つ支持部１２ａとは反対側に延びる受け部１２ｃを備えた略Ｚ字形状のものであり、図１、図２に示すように、支持部１２ａと壁部１２ｂを大引き３の上面及び側面に押し当て、釘、ねじ、接着剤、両面テープ等で固定することで、ハンガー材１２を大引き３に容易に取り付けることができる。また、取り付けた状態では、受け部１２ｃが大引き３の側面の所定の高さ位置に直角に突出した状態となり、その受け部１２ｃに支持材１３を保持させることができる。この受け部１２Ｃには、支持材１３を安定して保持できるよう、支持材１３に形成しているリブを挿入させるためのスリット１５を形成している。
【００１４】
支持材１３は、図４に示すように、断熱材を支持するための水平な支持板部１３ａと、その下面の中央に下方に延びるリブ１３ｂとを有する断面Ｔ字型の形材で構成されている。このリブ１３ｂは落下防止用として作用し、図２（ｂ）、（ｃ）に示すように、ハンガー材１２の受け部１２ｃの上方から落とし込むようにしてリブ１３ｂをスリット１５に挿入させ、支持板部１３ａを受け部１２ｃに乗せることで、受け部１２ｃに安定して保持させることができる。また、リブ１３ｂは、支持材１３の自重をあまり増加させることなく、支持材１３の曲げ剛性を高める作用も果たしており、このため、支持材１３は軽量でありながら大きい曲げ剛性を備えている。また、本実施の形態では、支持材１３に断面Ｔ字型の形材を採用したことで、所望長さのものを低コストで製造することができる。支持材１３の長さは、大引き３、３の間隔が施工誤差等によって多少変化しても、両側のハンガー材１２の受け部１２ｃに支障なく保持させることができるように、大引き３、３の内法寸法よりも少し小さく設定されている。なお、必要に応じ、施工現場において支持材１３を切断し、長さ調整を行っても良い。ハンガー材１２及び支持材１３の材質は、ポリプロピレン、ポリ塩化ビニール等の熱伝導性の低いプラスチックが好ましいが、その他、無機材、木、紙、金属或いはこれらの複合材を使用することもできる。
【００１５】
次に、上記構成の取付具１１を用いた断熱材の施工手順を説明する。先ず、図２（ａ）に示すように、一対の大引き３、３の向かい合った位置及び長手方向に適当な間隔Ｐを開けた位置にハンガー材１２を取り付けて行く。この作業は、小さい部品であるハンガー材１２を大引き３に取り付けるのみであるので、簡単に実施できる。次に、図２（ｂ）、（ｃ）に示すように、ハンガー材１２の受け部１２ｃに支持材１３を乗せて行く。この作業も、単に支持材１３の下面のリブ１３ｂが受け部１２ｃのスリット１５に挿入されるように乗せて行くだけでよいので簡単に実施できる。その後、支持材１３の上に断熱材７を乗せる。以上のようにして、きわめて簡単な作業で断熱材７を一対の大引き３、３の間に配置してゆくことができる。また、この作業中、支持材１３を取り付けた後で一対の大引き３、３の間を通行する必要が生じた時には、支持材１３を簡単に外せるので、支持材１３が足に引っかかるといったトラブルを回避できる。
【００１６】
以上のようにして設置された断熱材７は、曲げ剛性の大きい支持材１３によって全幅を支持されるため、幅方向の中央部が自重で垂れ下がるということがなく、断熱欠損や結露の発生を無くすことができる。また、取付具１１の配置間隔Ｐを適切に設定することで、断熱材７の長手方向の垂れ下がりも防止でき、良好な断熱効果を維持できる。
【００１７】
本発明の実施に当たって、取付具１１の各部の寸法や設置間隔は、断熱材７の垂れ下がりが所望の許容値以下となるように設定すればよく、従って、取付具１１の使用場所に応じて適宜設定すればよいが、間隔（内法寸法）が８００〜９５０ｍｍ程度の大引き３、３の間に、厚さが４０〜１００ｍｍ程度、幅が８００〜９５０ｍｍ程度、長さが１８００〜２０００ｍｍ程度の断熱材７（密度約２５〜５０ｋｇ／ｍ³程度）を取り付ける場合、大よその目安としては、次の数値を例示できる。図３において、ハンガー材１２の肉厚ｔ₁は０．３〜１．５ｍｍ、幅ｗ₁は１５〜５０ｍｍ、支持部１２ａの長さｄ₁は１５〜５０ｍｍ、壁部１２ｂの高さｈ₁は３０〜１００ｍｍ、受け部１２ｃの長さは１５〜５０ｍｍ、スリット１５の幅は２〜５ｍｍ程度を例示できる。壁部１２ｂの高さｈ₁は、使用する断熱材７の厚さと支持板部１３ａの肉厚ｔ₂の和より、１〜２ｍｍ程度低い方が好ましい。これにより、大引き３の上部に施される根太４や合板等の床下地材（図示せず）と断熱材７の間のすきまを小さくでき、結果として断熱性の低下を抑制することができる。また、図４において、支持材１３の支持板部１３ａ及びリブ１３ｂの肉厚ｔ₂は０．５〜３．０ｍｍ、支持板部１３ａの幅ｗ₂は１５〜７０ｍｍ、リブ１３ｂの高さｈ₂は１０〜６０ｍｍ、支持材１３の長さＬは７９０〜９１０ｍｍ、曲げ剛性（＝ヤング率Ｅ×断面二次モーメントＩ）は１×１０⁴（ｋｇ・ｃｍ²）程度以上、重量は５００ｇ程度以下を例示できる。取付具１１の設置位置は、断熱材７の長手方向の中心位置及びその両側にそれぞれ断熱材７の長さの３０〜４０％の間隔だけ離れた位置とすることが好ましい。
【００１８】
以上に、本発明の好適な実施の形態に係る取付具１１を説明したが、本発明の取付具はこの構成に限らず、種々な変形が可能である。以下、その例をいくつか示す。図５はハンガー材の変形例を示すものであり、（ａ）に示すハンガー材１２Ａは、支持部１２ａの端部に下向きの爪１２ｄを形成したものである。このハンガー材１２Ａは、大引きに取り付ける際、この爪１２ｄを大引きの上面に突き刺すことで大引きに固定でき、固定作業を容易とできる。なお、この爪１２ｄを用いる場合においても、接着剤、両面テープ、釘、ねじ等を併用してもよい。（ｂ）に示すハンガー材１２Ｂはスリット１５を受け部１２ｃの奥まで形成したものである。（ｃ）、（ｄ）に示すハンガー材１２Ｃ、１２Ｄはスリット１５を袋状としたものである。（ｅ）、（ｆ）に示すハンガー材１２Ｅ、１２Ｆは受け部１２ｃにリブ１２ｆ、１２ｇを形成したものである。これらのハンガー材１２Ｃ〜１２Ｆは、受け部１２ｃの強度が大きくなっている。
【００１９】
図６（ａ）〜（ｄ）は支持材の変形例を示す概略斜視図、（Ａ）〜（Ｄ）は（ａ）〜（ｄ）に示す支持材をハンガー材の受け部１２ｃに保持させた状態で示す概略断面図である。図６の（ａ）、（Ａ）に示す支持材１３Ａは、リブ１３ｂの両側に凸部１３ｄを設けて抜け止めを図ったものである。（ｂ）、（Ｂ）に示す支持材１３Ｂは、支持板部１３ａの上面を凸形状としたものである。（ｃ）、（Ｃ）に示す支持材１３Ｃは、断面形状をＴ字型２段重ねとしたもの、（ｄ）、（Ｄ）に示す支持材１３Ｄは、断面形状をＹ字型としたものであり、いずれも垂直な１個のリブ１３ｂを有し、それをハンガー材の受け部１２ｃのスリット１５に挿入させて保持されている。
【００２０】
図７（ａ）、（ｂ）は支持材の他の変形例を示す概略斜視図、（Ａ）、（Ｂ）は（ａ）、（ｂ）に示す支持材をハンガー材の受け部１２ｃに保持させた状態で示す概略断面図である。図７の（ａ）、（Ａ）に示す支持材１３ＥはＩ型又はＨ型断面の形材で構成したものであり、リブ１３ｂをハンガー材の受け部１２ｃのスリット１５に挿入しうるよう、下側のフランジ１３ｆの端部を切り欠いている。図７の（ｂ）、（Ｂ）に示す支持材１３ＦはＥ断面の形材で構成したものであり、中央のリブ１３ｂの両側に更にリブ１３ｇ、１３ｇを有している。この支持材１３Ｆを支持するハンガー材の受け部１２ｃは、その幅を、支持材１３Ｆの両側のリブ１３ｇ、１３ｇよりも狭く設定しており、図７（Ｂ）に示す形態で支持材１３Ｆを支持することができる。
【００２１】
図８（ａ）、（ｂ）は支持材の更に他の変形例を示す概略斜視図、（Ａ）、（Ｂ）は（ａ）、（ｂ）に示す支持材をハンガー材の受け部１２ｃに保持させた状態で示す概略断面図である。図８の（ａ）、（ｂ）に示す支持材１３Ｇ、１３Ｈはそれぞれ、コ字型及びＨ形断面の形材で構成したものであり、それぞれ２個の脱落防止用兼たわみ防止用のリブ１３ｈ、１３ｈを備えている。これらの支持材１３Ｇ、１３Ｈを支持するハンガー材の受け部１２ｃは、その幅を、両側のリブ１３ｈ、１３ｈよりも狭く設定しており、図８（Ａ）、（Ｂ）に示す形態で支持材１３Ｇ、１３Ｈを支持することができる。すなわち、支持材１３Ｇ、１３Ｈは、一対のリブ１３ｈ、１３ｈがハンガー材の受け部１２ｃをはさみ、脱落防止を計った形態で受け部１２ｃに保持されることができる。なお、ここで用いる受け部１２ｃにはスリット１５は設けなくても良い。
【００２２】
図９はコ字型断面の支持材１３Ｇと、それを前記したものとは異なる態様で支持するハンガー材１２Ｇを示すものである。ハンガー材１２Ｇは、その受け部１２ｃに２個のスリット１５、１５を有しており、その２個のスリット１５、１５に支持材１３Ｇの２個のリブ１３ｈ、１３ｈを挿入させた形態で支持材１３Ｇを保持できる。
【００２３】
【実施例】
（１）厚さ０．５ｍｍの鋼板を図３に示す形状に成形し、ハンガー材１２とした。そのハンガー材１２の各部寸法は次の通りとした。
ｗ₁＝２０ｍｍ、ｄ₁＝２０ｍｍ、ｈ₁＝４０ｍｍ、ｄ₂＝２５ｍｍ、スリット１５の幅＝３ｍｍ、スリット長さ＝２０ｍｍ。
（２）厚さ１．５ｍｍの硬質塩化ビニール樹脂を図４に示す形状に成形したものを支持材１３とした。その支持材１３の各部寸法は次の通りとした。
ｗ₂＝３０ｍｍ、ｈ₂＝２７ｍｍ、Ｌ＝８１０ｍｍ。
この支持材１３の曲げ剛性（ＥＩ）は２．９×１０⁴ ｋｇ・ｃｍ²、重量は９４．４ｇであった。
（３）断熱材７としては、グラスウール製のもので、厚さ４５ｍｍ×幅８２０ｍｍ×長さ１８２０ｍｍ、密度３２ｋｇ／ｍ³のものを用いた。なお、この断熱材７には、室内側外皮材として防湿性ポリフィルム（１５μｍ）、室外側外皮材として透湿性アルミ蒸着有孔ポリフィルム（９μｍ）を配している。
（４）施工
図１０に示すように、上記した仕様のハンガー材１２及び支持材１３からなる取付具１１を、内法寸法が８２０ｍｍの大引き３、３に取り付け、断熱材７を支持させた。ここで、取付具１１の取付位置は、断熱材７の長手方向の中心部に１組、その両側の、中心部から６０５ｍｍの間隔をあけた位置に各１組、合計３組を用いた。
（５）たわみ測定
施工直後における断熱材７の上面のたわみ量を測定したところ、幅方向にはほとんどたわみは見られなかったが、長手方向には最大で１ｍｍ程度のたわみが見られた。すなわち、図１０に示す中心線Ｏ−Ｏ上に採った測定点Ａ〜Ｇの、基準平面（この実施例では、大引き３の上面を基準平面とした）からの距離を測定してたわみを求めたところ、測定点Ａ、Ｇが他の測定点に比べて１ｍｍ程度低くなっていた。その後、２ヶ月経過後に、再度基準平面からの距離を測定したところ、全体的に約０．８ｍｍ程度低下していた。しかしながら、これらのたわみ量や低下量はいずれも微小であるので、何ら問題となるものではなく、換言すれば、取付具１１で断熱材７を良好に保持できることが確認できた。
【００２４】
【発明の効果】
以上のように、本発明の取付具は、一対のハンガー材と、そのハンガー材に両端を保持された形態で取り付けられ、断熱材を支持する支持材とを備えた構成としたものであるので、断熱材の全幅を支持材で支持することができ、断熱材の中央部の垂れ下がりを防止して断熱欠損や結露の発生を無くすことができるという効果を有している。また、取付具が一体構造ではなく、小さい部品である一対のハンガー材と簡単な構造の支持材とで構成されるため、各部品を低コストで製造できると共に保管や運搬等の取り扱いが容易であり、しかも現場での施工が容易であるといった効果も有している。
【図面の簡単な説明】
【図１】（ａ）は、本発明の好適な実施の形態に係る取付具を用いて、一対の大引きの間に断熱材を取り付けた構造を示す概略断面図
（ｂ）はその概略平面図
【図２】（ａ）、（ｂ）、（ｃ）、（ｄ）は施工手順を示す概略斜視図
【図３】ハンガー材の概略斜視図
【図４】支持材の概略斜視図
【図５】（ａ）、（ｂ）、（ｃ）、（ｄ）、（ｅ）、（ｆ）はハンガー材の変形例を示す概略斜視図
【図６】（ａ）、（ｂ）、（ｃ）、（ｄ）は支持材の変形例を示す概略斜視図
（Ａ）、（Ｂ）、（Ｃ）、（Ｄ）は（ａ）、（ｂ）、（ｃ）、（ｄ）に示す支持材をハンガー材の受け部に保持させた状態で示す概略断面図
【図７】（ａ）、（ｂ）は支持材の他の変形例を示す概略斜視図
（Ａ）、（Ｂ）は（ａ）、（ｂ）に示す支持材をハンガー材の受け部に保持させた状態で示す概略断面図
【図８】（ａ）、（ｂ）は支持材の更に他の変形例を示す概略斜視図
（Ａ）、（Ｂ）は（ａ）、（ｂ）に示す支持材をハンガー材の受け部に保持させた状態で示す概略断面図
【図９】コ字型断面の支持材と、それを支持するハンガー材１２Ｇの概略斜視図
【図１０】実施例で大引き間に取り付けた断熱材を示す概略平面図
【図１１】床下構造を示す概略斜視図
【図１２】（ａ）、（ｂ）は断熱材の取付構造の従来例を示す概略断面図
【図１３】（ａ）は従来の受け材の概略側面図
（ｂ）は受け材を用いて断熱材を取り付けた構造を示す概略断面図
【符号の説明】
３大引き（床構造体）
４根太
７断熱材
１１取付具
１２ハンガー材
１２ａ支持部
１２ｂ壁部
１２ｃ受け部
１５スリット
１３支持材
１３ａ支持板部
１３ｂリブ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fixture used for attaching a heat insulating material under a floor.
[0002]
[Prior art]
The Ministry of International Trade and Industry, Ministry of Construction Notification No. 2 and Ministry of Construction Notification No. 451 include the criteria for the owner's judgment regarding the rational use of energy related to houses and the design and construction guidelines related to the rational use of energy related to houses. As shown, standards or guidelines for heat insulation of roofs or ceilings, walls, and floors are shown, and based on these, heat insulation of houses is constructed. And in the heat insulation construction under floors, such as a house, arranging plate-like inorganic fiber heat insulating materials, such as glass wool, between floor structures, such as a large drawing, is performed.
[0003]
In general, as shown in FIG. 11, the floor of a house has a large pull 3 placed horizontally on the foundation 1 or on the lower pillar 2 with an appropriate interval, and the joists 4 are arranged on it. A floor material (not shown) is arranged on the joist 4, and a heat insulating material is arranged between the draws 3 and 3. And in order to arrange | position a heat insulating material between the large draws 3 and 3, as shown to Fig.12 (a), on the side surfaces 3a and 3a which the large draws 3 and 3 mutually faced, the receiving material made of wood or metal 6 was fixed and the heat insulating material 7 was hold | maintained on it. However, in this method, the receiving members 6 and 6 must be fixed at the same height position on the side surfaces 3a and 3a of the facing pullings 3 and 3, and the work is troublesome. Since only the both side edges are supported by the receiving material 6, the center part of the heat insulating material may hang down due to its own weight. For this reason, there is a problem that a large gap is generated between the floor plate and the heat insulating defect or condensation occurs. there were.
[0004]
Further, instead of using the receiving members 6 and 6, as shown in FIG. 12 (b), the lower sides of both side edges of the heat insulating material 7 are cut out to form mounting portions 7a on the heat insulating material 7 itself, and the mounting thereof. Japanese Patent No. 3024716 proposes a method in which the portions 7a and 7a are mounted on the large pulls 3 and 3 and the other portions are fitted between the large pulls 3 and 3. However, this method requires a work of cutting out both side edges of the heat insulating material 7, and there is also a problem that the central portion of the heat insulating material 7 hangs down due to its own weight, resulting in heat insulating defects and condensation.
[0005]
Therefore, in order to prevent the central portion of the heat insulating material from sagging, as shown in FIG. 13 (a), a receiving portion 9a that supports the heat insulating material, and a wall portion 9b that extends upward in a perpendicular direction at both ends thereof, 9b and a receiving material 9 provided with support portions 9c, 9c extending outward in a right angle direction at the upper end thereof, as shown in FIG. It is proposed in Japanese Utility Model Registration No. 3008188 that it passes like a bridge and supports the heat insulating material 7 by its receiving portion 9a. However, since the receiving member 9 has an integral structure, the length of the receiving portion 9a of the receiving member 9 is sufficient to allow the receiving member 9 to be easily attached between the pullings 3 and 3 that are likely to cause an assembly dimension error. Must be set to be considerably smaller than the inner dimensions of the large pulls 3 and 3, so that when the receiving material 9 is attached to the large pulls 3 and 3, the side surface 3 a of the large pull 3 and the receiving material 9 In many cases, a considerable gap is formed between the wall portion 9b and the gap between the heat insulating material 7 and the large pull 3 due to this gap, and there is a problem that heat insulation defects and condensation occur. . Moreover, since the receiving material 9 is fixed in the form which passes a bridge to the large pulls 3 and 3, once it is attached, this cannot be removed easily, and between the large pulls 3 and 3 When the worker moves, his / her feet may be caught on the receiving portion 9a, and workability may be deteriorated. In addition, since the receiving member 9 is integrated with the long receiving portion 9a and the wall portions 9b and 9b and the supporting portions 9c and 9c at both ends thereof, the overall shape becomes complicated and the size becomes large. The manufacturing cost of the material is high, and there are also problems such as inconvenience in transportation and handling.
[0006]
[Problems to be solved by the invention]
The present invention has been made in view of the related problems, and it is possible to attach a heat insulating material between a pair of large pullouts 3 and 3 in a state of preventing drooping between floor structures. It is an object of the present invention to provide an underfloor heat insulating fixture that is simple in structure, low in cost, excellent in transportability and handling properties, and good on site workability.
[0007]
[Means for Solving the Problems]
The attachment for the underfloor heat insulating material according to the present invention is a pair of hanger materials that are attached to opposite positions of a square-like floor structure that is horizontally arranged with an interval such as a large pull, each of which is A support portion mounted on the upper surface of the floor structure, a wall portion extending downward in a perpendicular direction from one end of the support portion, and a receiver extending substantially perpendicular to the lower end of the wall portion and opposite to the support portion. A pair of hanger materials provided with a portion, and a support material that supports the heat insulating material and is attached in a form of holding both ends to the receiving portions of the pair of hanger materials attached to the floor structure. And a support material provided with ribs for preventing fall from the hanger material. With this configuration, the hanger material is fixed to the floor structure, the support material is placed on the hanger material, and the heat insulation material is placed on the support material, so that the full width of the heat insulation material can be supported by the support material, It is possible to prevent the occurrence of heat insulation defects and condensation by preventing the central portion of the heat insulating material from sagging. In addition, since the fixture is composed of a pair of hanger materials and a support material that is a separate part, each part can be made smaller, can be manufactured at low cost, and transport, handling, construction at the site, etc. are easy. Moreover, even if there are some errors in the spacing between the floor structures, they can be installed without any problem. Furthermore, even after being attached to the floor structure, the support material can be easily detached from the pair of hangers, so that when an operator needs to walk between the floor structures, he / she can catch his / her foot. No field work can be performed easily.
[0008]
Here, it is preferable that the support member is provided with a rib for preventing deflection over substantially the entire length thereof. This bend prevention rib may be provided separately from the fall prevention rib, but in order to simplify the structure of the support material, reduce the weight, and make it easy to manufacture, More preferably, the rib and the rib for preventing deflection are integrated. By providing such a rib for preventing bending, the bending rigidity can be extremely increased, and further the drooping of the central portion of the heat insulating material can be further prevented, thereby preventing the occurrence of heat insulation defects and condensation.
[0009]
In addition, it is preferable that a slit for inserting a drop-preventing rib provided in the support member is formed in the receiving part of the hanger material, and, if configured, the drop-preventing rib of the support member is received. The support material is not displaced from the receiving portion by being inserted into the slit of the part and attached, and the support material can be held by the hanger material so as not to fall off by a simple operation.
[0010]
The supporting material used in the present invention may have any structure as long as it has ribs for preventing fall at both ends, but it is desirable to use a shape with a constant cross section in the length direction. This is preferable because the support material can be manufactured at a low cost and can be easily adjusted at the site by cutting it to a desired length as required. Furthermore, it is a simple structure that the support material is formed of a T-shaped section having a horizontal support plate portion for supporting the heat insulating material and a rib extending downward at the center of the lower surface. Therefore, it is more preferable because it can be manufactured at low cost and has a wide support surface for supporting the heat insulating material.
[0011]
It is preferable to form a claw for piercing the floor structure at the tip of the support portion of the hanger material. If it is set as this structure, a hanger material can be fixed to a floor structure by piercing the nail | claw in a floor structure, and the attachment operation | work of a hanger material can be performed easily.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail with reference to embodiments of the drawings. FIG. 1A is a schematic cross-sectional view showing a structure in which a heat insulating material is attached between a pair of floor structures using a fixture according to a preferred embodiment of the present invention, and FIG. FIGS. 2A, 2B, 2C, and 2D are schematic perspective views showing a construction procedure. In FIGS. 1 and 2, reference numerals 3 and 3 denote a pair of square-like floor structures, which are large pulls in this example. Reference numeral 7 denotes a plate-like heat insulating material such as glass wool or rock wool attached between the pair of large draws 3 and 3, and 11 denotes a fixture according to the embodiment of the present invention. The fixture 11 is composed of a pair of hanger members 12 for attaching to the large pulls 3 and 3, and a support member 13 attached to the pair of hanger members 12 in a form in which both ends are held.
[0013]
As shown in FIG. 3, the hanger material 12 includes a support portion 12 a that is placed on the upper surface of the large pull 3, a wall portion 12 b that extends downward in a perpendicular direction from one end of the support portion 12 a, and a lower end of the wall portion 12 b. As shown in FIGS. 1 and 2, the support portion 12 a and the wall portion 12 b are separated from each other by a large pull 3. The receiving portion 12 c extends in a direction perpendicular to the support portion 12 a. The hanger material 12 can be easily attached to the large pull 3 by pressing against the top and side surfaces and fixing with nails, screws, adhesive, double-sided tape or the like. Further, in the attached state, the receiving portion 12c protrudes at a right angle to a predetermined height position on the side surface of the large pull 3, and the supporting member 13 can be held by the receiving portion 12c. The receiving portion 12C is formed with slits 15 for inserting ribs formed on the support material 13 so that the support material 13 can be stably held.
[0014]
As shown in FIG. 4, the support member 13 is composed of a T-shaped section having a horizontal support plate portion 13a for supporting the heat insulating material and a rib 13b extending downward at the center of the lower surface thereof. ing. This rib 13b acts as a fall prevention, and as shown in FIGS. 2 (b) and 2 (c), the rib 13b is inserted into the slit 15 so as to be dropped from above the receiving portion 12c of the hanger material 12, and the support plate By placing the portion 13a on the receiving portion 12c, the receiving portion 12c can be stably held. Moreover, the rib 13b also has the effect | action which raises the bending rigidity of the support material 13 without increasing the dead weight of the support material 13 so much, For this reason, the support material 13 is equipped with large bending rigidity although being lightweight. Further, in the present embodiment, by adopting a T-shaped cross section for the support member 13, a desired length can be manufactured at a low cost. The length of the support member 13 is such that even if the distance between the large pulls 3 and 3 is slightly changed due to construction errors or the like, the large pulls 3 and 3 can be held by the receiving portions 12c of the hanger members 12 on both sides without any trouble. It is set to be slightly smaller than the internal dimension of 3. If necessary, the support material 13 may be cut at the construction site to adjust the length. The hanger material 12 and the support material 13 are preferably plastics having low thermal conductivity such as polypropylene and polyvinyl chloride, but other materials such as inorganic material, wood, paper, metal, or a composite material thereof can also be used.
[0015]
Next, the construction procedure of the heat insulating material using the fixture 11 having the above configuration will be described. First, as shown in FIG. 2A, the hanger material 12 is attached to a position where the pair of large pulls 3 and 3 face each other and a position where an appropriate interval P is opened in the longitudinal direction. This operation can be easily performed because only the hanger material 12 which is a small part is attached to the large pull 3. Next, as shown in FIGS. 2B and 2C, the support material 13 is put on the receiving portion 12 c of the hanger material 12. This operation can also be easily performed because it is only necessary to place the rib 13b on the lower surface of the support member 13 so as to be inserted into the slit 15 of the receiving portion 12c. Thereafter, the heat insulating material 7 is placed on the support material 13. As described above, the heat insulating material 7 can be disposed between the pair of large draws 3 and 3 by an extremely simple operation. Further, during this work, when it becomes necessary to pass between the pair of large pulls 3 and 3 after the support member 13 is attached, the support member 13 can be easily removed, so that the support member 13 is caught on the foot. Can be avoided.
[0016]
Since the heat insulating material 7 installed as described above is supported by the support material 13 having a large bending rigidity, the central portion in the width direction does not hang down due to its own weight, thereby eliminating the occurrence of heat insulation defects and condensation. be able to. In addition, by appropriately setting the arrangement interval P of the fixtures 11, the heat insulating material 7 can be prevented from sagging in the longitudinal direction, and a good heat insulating effect can be maintained.
[0017]
In carrying out the present invention, the dimensions and installation intervals of each part of the fixture 11 may be set so that the sag of the heat insulating material 7 is not more than a desired allowable value, and accordingly, depending on the place where the fixture 11 is used. What is necessary is to set the thickness (inner dimensions) between the large draws 3 and 3 of about 800 to 950 mm, the thickness is about 40 to 100 mm, the width is about 800 to 950 mm, and the length is about 1800 to 2000 mm. When attaching the heat insulating material 7 (density about 25-50 kg / m < ³ >), the following numerical value can be illustrated as a rough standard. In FIG. 3, the thickness t ₁ of the hanger material 12 is 0.3 to 1.5 mm, the width w ₁ is 15 to 50 mm, the length d ₁ of the support portion 12a is 15 to 50 mm, and the height h _{1 of the} wall portion 12b. Is 30 to 100 mm, the length of the receiving portion 12 c is 15 to 50 mm, and the width of the slit 15 is about 2 to 5 mm. The height h ₁ of the wall portion 12b is preferably lower by about 1 to 2 mm than the sum of the thickness of the heat insulating material 7 to be used and the thickness t ₂ of the support plate portion 13a. Thereby, the clearance gap between floor base materials (not shown), such as the joist 4 and plywood which are given to the upper part of the large pull 3, and the heat insulating material 7 can be made small, and the fall of heat insulation can be suppressed as a result. . 4, the thickness t ₂ of the support plate portion 13a and the rib 13b of the support member 13 is 0.5 to 3.0 mm, the width w ₂ of the support plate portion 13a is 15 to 70 mm, and the height h of the rib 13b. ₂ is 10 to 60 mm, the length L of the support member 13 is 790 to 910 mm, the bending rigidity (= Young's modulus E × secondary moment of inertia I) is about 1 × 10 ⁴ (kg · cm ² ) or more, and the weight is about 500 g. The following can be illustrated. It is preferable that the installation position of the fixture 11 is a center position in the longitudinal direction of the heat insulating material 7 and a position separated by 30 to 40% of the length of the heat insulating material 7 on both sides thereof.
[0018]
As mentioned above, although the fixture 11 which concerns on preferred embodiment of this invention was demonstrated, the fixture of this invention is not restricted to this structure, A various deformation | transformation is possible. Some examples are shown below. FIG. 5 shows a modification of the hanger material, and the hanger material 12A shown in FIG. 5A has a downward claw 12d formed at the end of the support portion 12a. When this hanger material 12A is attached to the large pull, the hook 12d can be fixed to the large pull by piercing the upper surface of the large pull, and the fixing work can be facilitated. Even when the nail 12d is used, an adhesive, a double-sided tape, a nail, a screw, or the like may be used in combination. The hanger material 12B shown to (b) forms the slit 15 to the back of the receiving part 12c. Hanger materials 12C and 12D shown in (c) and (d) have slits 15 in a bag shape. Hanger materials 12E and 12F shown in (e) and (f) are obtained by forming ribs 12f and 12g on the receiving portion 12c. As for these hanger materials 12C-12F, the intensity | strength of the receiving part 12c is large.
[0019]
FIGS. 6A to 6D are schematic perspective views showing modifications of the support material, and FIGS. 6A to 6D are views in which the support material shown in FIGS. It is a schematic sectional drawing shown in the state. The support member 13A shown in FIGS. 6A and 6A is provided with protrusions 13d on both sides of the rib 13b to prevent the support 13A from coming off. The support member 13B shown in (b) and (B) has a convex shape on the upper surface of the support plate portion 13a. Support material 13C shown in (c) and (C) has a cross-sectional shape of a T-shaped double stack, and support material 13D shown in (d) and (D) has a cross-sectional shape of a Y-shape. Each has one vertical rib 13b, which is inserted and held in the slit 15 of the receiving portion 12c of the hanger material.
[0020]
FIGS. 7A and 7B are schematic perspective views showing other modified examples of the support material. FIGS. 7A and 7B show the support material shown in FIGS. It is a schematic sectional drawing shown in the state hold | maintained. The support member 13E shown in FIGS. 7 (a) and 7 (A) is formed of a shape member having an I-type or H-type cross section so that the rib 13b can be inserted into the slit 15 of the receiving portion 12c of the hanger material. The end of the lower flange 13f is cut away. A support member 13F shown in FIGS. 7 (b) and 7 (B) is formed of a section having an E cross section, and has ribs 13g and 13g on both sides of the central rib 13b. The width of the receiving portion 12c of the hanger material that supports the support material 13F is set to be narrower than the ribs 13g and 13g on both sides of the support material 13F, and the support material 13F is arranged in the form shown in FIG. Can be supported.
[0021]
FIGS. 8A and 8B are schematic perspective views showing still another modified example of the support material, and FIGS. 8A and 8B show the support material shown in FIGS. It is a schematic sectional drawing shown in the state hold | maintained. Each of the support members 13G and 13H shown in FIGS. 8A and 8B is composed of a U-shaped and an H-shaped cross section, and each has two ribs for preventing dropout and bending. 13h and 13h. The support portions 12c of the hanger material that support these support materials 13G and 13H are set to be narrower than the ribs 13h and 13h on both sides, and are supported in the form shown in FIGS. 8 (A) and 8 (B). The materials 13G and 13H can be supported. That is, the support members 13G and 13H can be held by the receiving portion 12c in a form in which the pair of ribs 13h and 13h sandwich the receiving portion 12c of the hanger material and prevent falling. The receiving portion 12c used here does not have to be provided with the slit 15.
[0022]
FIG. 9 shows a support material 13G having a U-shaped cross section and a hanger material 12G for supporting it in a manner different from that described above. The hanger material 12G has two slits 15 and 15 in the receiving portion 12c, and is supported by inserting the two ribs 13h and 13h of the support material 13G into the two slits 15 and 15. The material 13G can be held.
[0023]
【Example】
(1) A steel plate having a thickness of 0.5 mm was formed into the shape shown in FIG. The dimensions of each part of the hanger material 12 were as follows.
w ₁ = 20 mm, d ₁ = 20 mm, h ₁ = 40 mm, d ₂ = 25 mm, width of slit 15 = 3 mm, slit length = 20 mm.
(2) A support material 13 was formed by molding a rigid vinyl chloride resin having a thickness of 1.5 mm into the shape shown in FIG. The dimensions of each part of the support material 13 were as follows.
w ₂ = 30 mm, h ₂ = 27 mm, L = 810 mm.
The support member 13 had a flexural rigidity (EI) of 2.9 × 10 ⁴ kg · cm ² and a weight of 94.4 g.
(3) The heat insulating material 7 is made of glass wool and has a thickness of 45 mm × width of 820 mm × length of 1820 mm and a density of 32 kg / m ³ . The heat insulating material 7 is provided with a moisture-proof polyfilm (15 μm) as an indoor skin material and a moisture-permeable aluminum vapor-deposited polyfilm (9 μm) as an outdoor skin material.
(4) As shown in FIG. 10, the fixture 11 composed of the hanger material 12 and the support material 13 having the above specifications is attached to the large pulls 3 and 3 having an internal dimension of 820 mm, and the heat insulating material 7 is supported. . Here, the attachment position of the fixture 11 used 1 set in the center part of the longitudinal direction of the heat insulating material 7, and 1 set each in the position which left the space | interval of 605 mm from the center part, and 3 sets in total were used.
(5) When the amount of deflection of the upper surface of the heat insulating material 7 immediately after the deflection measurement was measured, almost no deflection was observed in the width direction, but a maximum deflection of about 1 mm was observed in the longitudinal direction. That is, the deflection of the measurement points A to G taken on the center line OO shown in FIG. 10 is measured by measuring the distance from the reference plane (in this embodiment, the upper surface of the draw 3 is the reference plane). As a result, the measurement points A and G were about 1 mm lower than the other measurement points. Thereafter, when the distance from the reference plane was measured again after the elapse of 2 months, it was about 0.8 mm lower overall. However, since both the amount of deflection and the amount of decrease are very small, there is no problem. In other words, it was confirmed that the heat insulating material 7 can be satisfactorily held by the fixture 11.
[0024]
【The invention's effect】
As described above, the fixture of the present invention is configured to include a pair of hanger materials and a support material that is attached in a form in which both ends are held by the hanger material and supports the heat insulating material. In addition, the entire width of the heat insulating material can be supported by the support material, and it is possible to prevent the central portion of the heat insulating material from sagging and to eliminate the occurrence of heat insulation defects and condensation. In addition, since the fixture is not a monolithic structure but is composed of a pair of hanger materials that are small parts and a support material with a simple structure, each part can be manufactured at low cost and can be easily handled such as storage and transportation. In addition, there is an effect that construction on site is easy.
[Brief description of the drawings]
FIG. 1A is a schematic cross-sectional view showing a structure in which a heat insulating material is attached between a pair of large pulls using a fixture according to a preferred embodiment of the present invention, and FIG. [Fig. 2] (a), (b), (c) and (d) are schematic perspective views showing the construction procedure. [Fig. 3] A schematic perspective view of a hanger material. [Fig. 4] A schematic perspective view of a support material. 5 (a), (b), (c), (d), (e), and (f) are schematic perspective views showing modifications of the hanger material. FIG. 6 (a), (b), (c) ), (D) are schematic perspective views showing modifications of the support material. (A), (B), (C), (D) are the supports shown in (a), (b), (c), (d). FIGS. 7A and 7B are schematic perspective views showing other modified examples of the support material (A) and FIG. The support material shown in a) and (b) FIGS. 8A and 8B are schematic perspective views showing still another modified example of the support material. FIGS. 8A and 8B are schematic perspective views of the support material. FIG. 9 is a schematic cross-sectional view showing the support material shown in FIG. 9 held in the hanger material receiving portion. FIG. 9 is a schematic perspective view of the U-shaped cross-section support material and the hanger material 12G for supporting the support material. FIG. 11 is a schematic perspective view showing an underfloor structure. FIGS. 12A and 12B are schematic cross-sectional views showing a conventional example of a heat insulating material mounting structure. FIG. 13A is a schematic side view of a conventional receiving material, and FIG. 13B is a schematic cross-sectional view showing a structure in which a heat insulating material is attached using the receiving material.
3 large draw (floor structure)
4 joist 7 heat insulating material 11 fixture 12 hanger material 12a support portion 12b wall portion 12c receiving portion 15 slit 13 support material 13a support plate portion 13b rib

Claims

A pair of hanger materials attached to opposite positions of a square-shaped floor structure that is horizontally disposed with a space between each of the support parts, which are placed on the upper surface of the floor structure, A pair of hangers provided with a wall portion extending downward in a perpendicular direction from one end, and a receiving portion extending in a direction substantially perpendicular to the lower end of the wall portion and opposite to the support portion, and attached to the floor structure A support member that is attached in a form to hold both ends to the receiving portions of the pair of hanger materials and supports the heat insulating material, and at least both ends are provided with ribs for preventing fall from the hanger material. A fixture for underfloor insulation provided.

The underfloor heat insulating fixture according to claim 1, wherein the support member is provided with a rib for preventing deflection that is separate from or integrated with the rib for preventing fall over substantially the entire length.

The underfloor heat insulating material fixture according to claim 1 or 2, wherein a slit for inserting a drop-preventing rib provided on the support material is formed in the receiving portion of the hanger material.

The said support material is comprised by the cross-sectional T-shaped profile which has a horizontal support plate part for supporting a heat insulating material, and the rib extended below in the center of the lower surface. A fixture for an underfloor heat insulating material according to any one of claims 1 to 3.

5. The underfloor heat insulating fixture according to claim 1, wherein a nail for piercing the floor structure is formed at a tip of the support portion of the hanger material.