JP4239306B2

JP4239306B2 - Fireproof device for seismic isolation devices

Info

Publication number: JP4239306B2
Application number: JP20857099A
Authority: JP
Inventors: 治長谷川; 重雄藤生
Original assignee: Oiles Corp
Current assignee: Oiles Corp
Priority date: 1999-07-23
Filing date: 1999-07-23
Publication date: 2009-03-18
Anticipated expiration: 2019-07-23
Also published as: JP2001032568A

Description

【０００１】
【発明の属する技術分野】
本発明は、建物等の構造物を地震の被害から防止するために構造物と基礎等の基体との間に配置される免震装置を火災等においても高温、火炎等に晒されないようにするための耐火装置に関する。
【０００２】
【発明が解決しようとする課題】
免震装置は、構造物を支持するように構造物と基体との間に配置されるのであるが、それの構成部材が火災での高温により溶壊、焼失したりして支持機能がなくなると、その火災がぼや程度であって火災自体は無事鎮火されても、構造物の倒壊という極めて重大な事故となる虞がある。したがって、免震装置には、火災によって構造物に対する支持機能が失われないようにすることが要求され、このために、免震装置を取り囲んで耐火壁等を設置して、火災等においても免震装置が高温、火炎等に晒されないようにすることが好ましい。
【０００３】
ところで、下沓と、この下沓上に水平方向及び垂直方向に可動に配された上沓と、地震による下沓の水平方向の振動に基づく上沓の水平方向の振動を、当該上沓に上下動を伴わせて免震するように、上下沓の間に介在された免震機構とを具備した免震装置に対して、耐火壁を、免震機構を取り囲むようにして、一方では下沓側に、他方では上沓側に夫々固定して設け、この耐火壁により火災において免震機構が高温、火炎等に晒されないようにすると、火災に際しての免震機構の溶壊、焼失に起因する構造物の倒壊という事態を回避し得るのであるが、耐火壁により下沓に対する上沓の可動性が阻害される結果となり、逆に、免震機構の免震機能を十分に発揮できなくなる虞がある。
【０００４】
本発明は、前記諸点に鑑みてなされたものであって、その目的とするところは、免震機構の免震機能を低下させることなしに、しかも、免震機構が高温、火炎等に晒されないようにすることができる免震装置のための耐火装置を提供することにある。
【０００５】
【課題を解決するための手段】
本発明の第一の態様の耐火装置は、下沓と、この下沓上に水平方向及び垂直方向に可動に配された上沓と、地震による下沓の水平方向の振動に基づく上沓の水平方向の振動を、当該上沓に上下動を伴わせて免震するように、上下沓の間に介在された免震機構とを具備した免震装置のための耐火装置であって、免震機構の周囲を囲繞して下沓側に固定して取り付けられた下耐火壁と、免震機構の周囲を囲繞して上沓側に固定して取り付けられた上耐火壁と、免震機構の周囲を囲繞して、且つ下耐火壁の上端面と上耐火壁の下端面とのうちのいずれか一方に取り付けられていると共に、下耐火壁の上端面と上耐火壁の下端面とのうちのいずれか他方に水平方向に摺動自在に接触して、当該上端面と下端面との間に介在された垂直方向に伸縮自在な耐火目地とを具備している。
【０００６】
第一の態様の耐火装置によれば、免震機構の周囲を囲繞する上下耐火壁を具備する上に、免震機構の周囲を囲繞して、且つ下耐火壁の上端面と上耐火壁の下端面とのうちのいずれか他方に水平方向に摺動自在に接触して、当該上端面と下端面との間に介在された垂直方向に伸縮自在な耐火目地を具備するために、免震機構をこれら上下耐火壁及び耐火目地によって外部と隔離できて、上下耐火壁及び耐火目地で囲まれた空間を断熱できると共に、当該空間内への火炎の回り込みを好ましく防止でき、而して、免震機構を火災において高温、火炎等に晒されないようにすることができて、免震機構が過度に加熱されることがなく、しかも、下沓に対する上沓の相対的な水平方向及び垂直方向の可動性を維持できて、而して、免震機構の免震機能を低下させることがない。
【０００７】
耐火目地は、本発明の第二の態様の耐火装置のように、上沓の下沓からの離反で、下耐火壁の上端面と上耐火壁の下端面とのうちのいずれか他方との間に垂直方向の隙間が生じないように、垂直方向に伸びるような弾性体からなっているとよい。
【０００８】
第二の態様の耐火装置によれば、耐火目地が垂直方向に伸びるような弾性体からなるために、火災における免震機構の熱膨張で上沓の下沓からの離反が生じても、下耐火壁の上端面と上耐火壁の下端面とのうちのいずれか他方と耐火目地との間に垂直方向の隙間が生じないようにされる結果、上下耐火壁及び耐火目地で囲まれた空間を更に確実に断熱できると共に、当該空間内への火炎の回り込みを更に好ましく防止できる。
【０００９】
耐火目地としては、無機耐火材からなることが好ましく、特に本発明の第三の態様の耐火装置のように、セラミックファイバ又はグラスファイバを主成分とした耐火材を含んでいることが好ましく、また、上下耐火壁としては、耐火目地と同様に無機耐火材からなることが好ましく、特に本発明の第四の態様の耐火装置のように、セラミックファイバ又はグラスファイバを含む耐火ボードからなることが好ましい。
【００１０】
免震機構は、本発明の第五の態様の耐火装置のように、下沓に固定された下に凸の凹面と、上沓に固定された上に凸の凹面と、両凹面に夫々移動自在に接触して両凹面間に介在された介在子とを具備していてもよく、この場合、介在子は、本発明の第六の態様の耐火装置のように、下面では下に凸の凹面に、上面では上に凸の凹面に夫々滑り移動自在に接触している滑り体からなり、両凹面又は滑り体の上下面は、滑り材からなる滑り層の露出面からなっていてもよく、ここで、滑り層を形成する滑り材は、本発明の第七の態様の耐火装置のように、ポリテトラフルオロエチレン樹脂を含んでいてもよく、滑り材からなる滑り層を具備する場合には、耐火目地は、本発明の第八の態様の耐火装置のように、滑り層の軟化又は消失においても、上に凸の凹面と滑り体の上面との間に隙間が生じないように、垂直方向に縮むような弾性体からなっていることが好ましく、また、介在子としては、滑り体に代えて、本発明の第九の態様の耐火装置のように、両凹面に転がり移動自在に接触している転がり体からなっていてもよい。
【００１１】
本発明に係る免震装置は、事務所ビル、集合住宅、戸建住宅又は美術品展示ケース等の構造物と、地盤、基礎又は基台等の基体との間に介在されて、基体上に構造物を免震支持するために用いられる。
【００１２】
【発明の実施の形態】
次に本発明を、その実施の形態の好ましい例を示す図を参照して詳細に説明する。なお、本発明はこれら実施の形態に何等限定されないのである。
【００１３】
図１から図３において、耐火装置１が用いられる本例の免震装置２は、下沓３と、下沓３上に水平方向Ｈ及び垂直方向Ｖに可動に配された上沓４と、地震による下沓３の水平方向Ｈの振動に基づく上沓４の水平方向Ｈの振動を、当該上沓４に上下動（垂直方向動）を伴わせて免震するように、上下沓３及び４の間に介在された免震機構５とを具備している。
【００１４】
下沓３は、基体としての直方体状の基台１１の上面１２にボルト等により固定された矩形状の下アンカープレート１３と、下アンカープレート１３の上面１４に同じくボルト等により固定された矩形状の下基板１５と、下基板１５の上面１６に同じくボルト等により固定された円板状の下側滑り受板１７とを具備している。
【００１５】
上沓４は、構造体としての展示ケース２１の下面２２にボルト等により固定された矩形状の上アンカープレート２３と、上アンカープレート２３の下面２４に同じくボルト等により固定された矩形状の上基板２５と、上基板２５の下面２６に同じくボルト等により固定された円板状の上側滑り受板２７とを具備している。
【００１６】
下沓３としては、下アンカープレート１３及び下基板１５のいずれかを省いて構成してもよく、更には、下アンカープレート１３及び下基板１５の両方を省いて、下側滑り受板１７を直接に基台１１の上面１２にボルト等により固定して構成してもよく、いずれにしても、下側滑り受板１７を基台１１に固定して下沓３を構成すればよく、また、上沓４も同様であって、上沓４としては、上アンカープレート２３及び上基板２５のいずれかを省いて構成してもよく、更には、上アンカープレート２３及び上基板２５の両方を省いて、上側滑り受板２７を直接に展示ケース２１の下面２２にボルト等により固定してもよく、いずれにしても、上側滑り受板２７を展示ケース２１に固定して上沓４を構成すればよい。
【００１７】
免震機構５は、下側滑り受板１７の上面３１に形成された下に凸の凹面３２と、上側滑り受板２７の下面３３に形成された上に凸の凹面３４と、下に凸の凸面である下面３５では凹面３２に、上に凸の凸面である上面３６では凹面３４に夫々滑り移動自在に接触して、両凹面３２及び３４間に介在された介在子としての円盤状の滑り体３７とを具備しており、凹面３２は、下側滑り受板１７の上面３１に形成された凹面に、ポリテトラフルオロエチレン樹脂等の滑り材を塗布して形成された滑り層の露出面からなり、凹面３４も、同じく上側滑り受板２７の下面３３に形成された凹面に、ポリテトラフルオロエチレン樹脂等の滑り材を塗布して形成された滑り層の露出面からなり、こうして、凹面３２は、下沓３に固定して形成され、凹面３４は、上沓４に固定して形成されている。滑り体３７において、下面３５及び上面３６の夫々は、凹面３２及び３４の夫々と面接触するように、当該凹面３２及び３４の夫々と相補的な形状を有しており、而して、本例の下面３５、上面３６、凹面３２及び３４は、互いに同一の曲率半径を有して、球面の一部からなっている。
【００１８】
なお、下側滑り受板１７及び上側滑り受板２７の上面３１及び下面３３の夫々の凹面に滑り層を形成する代わりに又はこの形成と共に、滑り体３７の下面３５及び上面３６に、ポリテトラフルオロエチレン樹脂及び充填材等を含む滑り材を塗布して滑り層を形成して、この滑り層の露出面を凹面３２及び３４の夫々に滑り移動自在に接触させてもよい。
【００１９】
耐火装置１は、免震機構５の周囲を囲繞して下沓３側に取り付けられた下耐火壁４１と、免震機構５の周囲を囲繞して上沓４側に取り付けられた上耐火壁４２と、免震機構５の周囲を囲繞して、且つ下耐火壁４１の上端面４３と上耐火壁４２の下端面４４とのうちのいずれか一方、本例では下端面４４に取り付けられていると共に、下耐火壁４１の上端面４３と上耐火壁４２の下端面４４とのうちのいずれか他方、本例では上端面４３に下面４６で水平方向Ｈに摺動自在に接触して、当該上端面４３と下端面４４との間に介在された垂直方向Ｖに伸縮自在な耐火目地４５とを具備している。
【００２０】
下耐火壁４１は、互いに分離可能な本例では４枚の耐火ボード５１〜５４からなり、耐火ボード５１〜５４の夫々は、ボルト等により下アンカープレート１３の各端面に取り外し自在に固定されて、下沓３側に取り付けられており、上耐火壁４２もまた、下耐火壁４１と同様に、互いに分離可能な本例では４枚の耐火ボード５５〜５８からなり、耐火ボード５５〜５８の夫々は、ボルト等により上アンカープレート２３の各端面に取り外し自在に固定されて、上沓４側に取り付けられている。耐火ボード５１〜５４及び５５〜５８の夫々は、セラミックファイバ又はグラスファイバ等の耐火材から形成されている。
【００２１】
下耐火壁４１は、下アンカープレート１３に固定される代わりに、基台１１、下基板１５及び下側滑り受板１７のいずれかに取り外し自在に固定されてもよく、上耐火壁４２も、同様に、上アンカープレート２３に固定される代わりに、基台２１、上基板２５及び上側滑り受板２７のいずれかに取り外し自在に固定されてもよい。
【００２２】
耐火目地４５は、上耐火壁４２と同様に４本の目地棒６１〜６４からなり、目地棒６１〜６４の夫々は、対応の耐火ボード５５〜５８の夫々の下面に、当該下面に形成された凹溝６５に目地棒６１〜６４の夫々の上面に一体的に形成された突起６８が嵌合されて、取付けられている。目地棒６１〜６４の夫々は、上沓４の下沓３からの垂直方向Ｈの離反で、上端面４３との間に垂直方向の隙間が生じないように、また、加熱による凹面３２及び３４の滑り層の軟化又は消失においても、凹面３４と滑り体３７の上面３６との間に隙間が生じないように、垂直方向Ｈに伸縮するようなセラミックファイバ又はグラスファイバを主成分とした耐火材を含む弾性体からなっている。
【００２３】
以上の例では下耐火壁４１、上耐火壁４２及び耐火目地４５を、施工、保守の容易化のために、互いに分割可能な耐火ボード５１〜５４、耐火ボード５５〜５８及び目地棒６１〜６４から構成したが、これに代えて、必要に応じていずれかを一体成形物で構成してもよい。
【００２４】
基台１１が建物の床に設置された免震装置２は、地震が生じない際には図１に示すように、上沓４が下沓３に対して水平方向Ｈ及び垂直方向Ｖに移動することなしに、展示ケース２１を支持している。建物の床が地震により水平方向Ｈに振動すると、免震機構５を介して上沓４が、図３に示すように、下沓２に対して水平方向Ｈ及び垂直方向Ｖに相対的に移動して、地震の水平方向Ｈの振動による展示ケース２１の振動を免震する。そして、免震装置２のこの免震動作で、耐火装置１は、下耐火壁４１の上端面４３に対して耐火目地４５の下端面４６が水平方向Ｈに滑ると共に耐火目地４５が垂直方向Ｖに伸縮して、上沓４の下沓３に対する水平方向Ｈ及び垂直方向Ｖの移動を許容する。
【００２５】
火災に際しては、耐火装置１は、下耐火壁４１、上耐火壁４２及び耐火目地４５が免震機構５を取り囲んで、免震機構５の周りに断熱された空間７０を形成しているために、免震機構５の加熱を抑制できると共に、免震機構５が火炎に晒されることを阻止し、免震機構５を含む免震装置２の溶壊、焼失を好ましく防止する。
【００２６】
すなわち、耐火装置１によれば、免震機構５の周囲を囲繞する上下耐火壁４２及び４１を具備する上に、免震機構５の周囲を囲繞して、且つ下耐火壁４１の上端面４３に水平方向Ｈに摺動自在に接触して、当該上端面４３と下端面４４との間に介在された垂直方向Ｖに伸縮自在な耐火目地４５を具備するために、免震機構５をこれら上下耐火壁４２及び４１並びに耐火目地４５によって外部と隔離できて、上下耐火壁４２及び４１並びに耐火目地４５で囲まれた空間７０を断熱できると共に、当該空間７０内への火炎の回り込みを好ましく防止でき、而して、免震機構５を火災において高温、火炎等に晒されないようにすることができて、免震機構５が過度に加熱されることがなく、しかも、下沓３に対する上沓４の相対的な水平方向Ｈ及び垂直方向Ｖの可動性を維持できて、而して、免震機構５の免震機能を低下させることがない。
【００２７】
更に、耐火目地４５が垂直方向Ｖに伸びるような弾性体からなるために、火災における免震機構５の熱膨張で上沓４の下沓３からの離反が生じても、下耐火壁４１の上端面４３と耐火目地４５の下端面４６との間に垂直方向Ｖの隙間が生じないようにされる結果、上下耐火壁４２及び４１並びに耐火目地４５で囲まれた空間７０を更に確実に断熱できると共に、当該空間７０内への火炎の回り込みを更に好ましく防止できる。
【００２８】
上記では、介在子として滑り体３７を具備して免震装置２を構成したが、これに代えて、図４及び図５に示すように、介在子として円柱状の転がり体７１〜７４を具備して免震装置７５を構成してもよい。本免震装置７５は、上記の下沓３及び上沓４と、下沓３に対しては上沓となり、上沓４に対しては下沓となる中間滑り受板７６と、地震による下沓３の水平方向Ｈの一の方向Ｈ１の振動に基づく中間滑り受板７６の方向Ｈ１の振動を、当該中間滑り受板７６に上下動を伴わせて免震するように、下沓３及び中間滑り受板７６の間に介在された免震機構７７と、地震による中間滑り受板７６の水平方向Ｈの一の方向Ｈ１に直交する他の一の方向Ｈ２の振動に基づく上沓４の方向Ｈ２の振動を、当該上沓４に上下動を伴わせて免震するように、中間滑り受板７６及び上沓４の間に介在された免震機構７８とを具備している。
【００２９】
免震機構７７は、下側滑り受板１７の上面３１にＨ１方向に並んで形成された下に凸の二つの凹面８１及び８２と、中間滑り受板７６の下面８３にＨ１方向に並んで形成された上に凸の二つの凹面８４及び８５と、凹面８１と凹面８４とに及び凹面８２と凹面８５との夫々に転がり移動自在に接触して、凹面８１と凹面８４との間及び凹面８２と凹面８５との間に介在された介在子としての前記の転がり体７１及び７２とを具備しており、免震機構７８は、中間滑り受板７６の上面８６にＨ２方向に並んで形成された下に凸の二つの凹面８７及び８８と、上側滑り受板２７の下面３３にＨ２方向に並んで形成された上に凸の二つの凹面８９及び９０と、凹面８７と凹面８９とに及び凹面８８と凹面９０との夫々に転がり移動自在に接触して、凹面８７と凹面８９との間及び凹面８８と凹面９０との間に介在された介在子としての前記の転がり体７３及び７４とを具備している。本例における凹面８１、８２、８４、８５、８７、８８、８９及び９０は、互いに同一の曲率半径を有して、円筒面の一部からなっている。
【００３０】
図４及び図５に示す免震装置７５のための耐火装置１も、前記と同様に、免震装置７５が火炎に晒されることを阻止し、免震機構７７及び７８を含む免震装置７５の溶壊、焼失を好ましく防止する。
【００３１】
また、図１及び図２では、円板状の上側滑り受板２７及び円盤状の滑り体３７を具備して免震装置２を構成したが、これに代えて、図６に示すように、円柱状の上側滑り受部材９３及び介在子としての二つの半球状体を一体にした滑り体９４を具備して免震装置９５を構成してもよい。上側滑り受部材９３は、その上面９６で上基板２５の下面２６の中央部に溶接等により固着されており、その下面９７には、凹面３２の曲率半径よりも十分に小さい曲率半径をもった上に凸の球面の一部からなる凹面９８が形成されており、滑り体９４は、凹面３２の曲率半径と同一の曲率半径をもった下に凸の凸面であって、球面の一部からなる下面９９と、下面９９の曲率半径よりも十分に小さく、凹面９８の曲率半径と同一の曲率半径をもった上に凸の凸面であって、球面の一部からなる上面１００とを有しており、下面９９では凹面３２に、上面１００では凹面９８に夫々滑り移動自在に接触している。このような免震装置９５に対しても、耐火装置１は、前記と同様に、免震装置９５が火炎に晒されることを阻止でき、免震装置９５の溶壊、焼失を好ましく防止できる。
【００３２】
【発明の効果】
本発明によれば、免震機構の免震機能を低下させることなしに、しかも、免震機構が高温、火炎等に晒されないようにすることができる免震装置のための耐火装置を提供することができる。
【図面の簡単な説明】
【図１】本発明の好ましい実施の形態の好ましい例の断面説明図である。
【図２】図１に示す例のＩＩ−ＩＩ線断面図である。
【図３】図１に示す例の動作説明図であって、ＩＩＩ−ＩＩＩ線矢視図である。
【図４】本発明の好ましい実施の形態の好ましい他の例の断面説明図である。
【図５】図４に示す例のＶ−Ｖ線矢視図である。
【図６】本発明の好ましい実施の形態の好ましい更に他の例の断面説明図である。
【符号の説明】
１耐火装置
２免震装置
３下沓
４上沓
５免震機構
４１下耐火壁
４２上耐火壁
４５耐火目地[0001]
BACKGROUND OF THE INVENTION
The present invention prevents a seismic isolation device arranged between a structure and a base such as a foundation from being exposed to high temperature, flame, etc. even in a fire in order to prevent the structure such as a building from being damaged by an earthquake. It relates to a fireproof device.
[0002]
[Problems to be solved by the invention]
The seismic isolation device is arranged between the structure and the base so as to support the structure. However, if the components of the structure are destroyed or burnt down due to high temperature in a fire, the support function is lost. Even if the fire is insignificant and the fire itself is safely extinguished, there is a risk of a very serious accident of collapse of the structure. Therefore, the seismic isolation device is required not to lose the support function for the structure due to a fire. For this reason, a fireproof wall is installed around the seismic isolation device, and it is exempted even in a fire. It is preferable to prevent the seismic device from being exposed to high temperatures, flames, and the like.
[0003]
By the way, the lower armpit, the upper armor that is movably arranged in the horizontal and vertical directions on the lower armpit, and the horizontal vibration of the upper armor based on the horizontal vibration of the lower armor caused by the earthquake are applied to the upper armor. For the seismic isolation device equipped with the seismic isolation mechanism interposed between the upper and lower ridges so that it is isolated with vertical movement, the fire wall is surrounded by the seismic isolation mechanism, If the seismic isolation mechanism is fixed to the heel side and the upper heel side on the other side so that the seismic isolation mechanism is not exposed to high temperatures, flames, etc. in a fire due to this fire wall, However, the fire wall may hinder the mobility of the upper arm against the lower arm, and conversely, the seismic isolation function of the seismic isolation mechanism may not be fully demonstrated. There is.
[0004]
The present invention has been made in view of the above points, and its object is to reduce the seismic isolation function of the seismic isolation mechanism and to prevent the seismic isolation mechanism from being exposed to high temperatures, flames, and the like. It is to provide a fireproof device for a seismic isolation device that can be made.
[0005]
[Means for Solving the Problems]
The fireproof device according to the first aspect of the present invention includes a lower arm, an upper arm that is movably disposed in a horizontal direction and a vertical direction on the lower arm, and an upper arm based on a horizontal vibration of the lower arm caused by an earthquake. A fireproof device for a seismic isolation device having a seismic isolation mechanism interposed between the upper and lower ridges so as to isolate the vibration in the horizontal direction along with the vertical movement of the upper heel. A lower fire wall that is fixed around the seismic mechanism and fixed to the lower heel side, an upper fire wall that is fixed around the seismic isolation mechanism and fixed to the upper heel side, and a seismic isolation mechanism And is attached to one of the upper end surface of the lower fire wall and the lower end surface of the upper fire wall, and the upper end surface of the lower fire wall and the lower end surface of the upper fire wall One of the two is slidably in contact with the other in the horizontal direction, and is vertically stretchable between the upper end surface and the lower end surface. It is and a fire joint.
[0006]
According to the fireproof device of the first aspect, in addition to the upper and lower fire walls surrounding the seismic isolation mechanism, the upper fire wall and the upper fire wall are surrounded by the upper and lower fire walls. In order to provide a fireproof joint that is slidable in the horizontal direction to either one of the lower end surfaces and that is vertically stretchable and interposed between the upper end surface and the lower end surface. The mechanism can be isolated from the outside by these upper and lower refractory walls and joints, so that the space surrounded by the upper and lower refractory walls and fire joints can be insulated, and the wraparound of the flame into the space can be preferably prevented. The seismic mechanism can be prevented from being exposed to high temperatures, flames, etc. in a fire, the seismic isolation mechanism is not overheated, and the horizontal and vertical directions of the upper arm relative to the lower arm The ability to maintain mobility, thus the seismic isolation function of the seismic isolation mechanism It will not be lowered.
[0007]
Like the fireproof device of the second aspect of the present invention, the fireproof joint is separated from the lower heel of the upper firewood, and is either the upper end surface of the lower fireproof wall or the lower end surface of the upper fireproof wall. It is preferable to be made of an elastic body extending in the vertical direction so that no vertical gap is generated therebetween.
[0008]
According to the fireproof device of the second aspect, since the fireproof joint is made of an elastic body that extends in the vertical direction, the thermal expansion of the seismic isolation mechanism in a fire causes the bottom A space surrounded by the upper and lower refractory walls and the refractory joint as a result of preventing a vertical gap from occurring between one of the upper end face of the refractory wall and the lower end face of the upper refractory wall and the fire joint. Can be further reliably insulated, and the wraparound of the flame into the space can be more preferably prevented.
[0009]
The refractory joint is preferably made of an inorganic refractory material, and particularly preferably contains a refractory material mainly composed of ceramic fiber or glass fiber, as in the refractory device of the third aspect of the present invention. The upper and lower refractory walls are preferably made of an inorganic refractory material in the same manner as the refractory joint, and are particularly preferably made of a refractory board containing ceramic fibers or glass fibers as in the refractory device of the fourth aspect of the present invention. .
[0010]
The seismic isolation mechanism moves to the concave concave surface fixed to the lower arm, the convex concave surface fixed to the upper arm, and the both concave surfaces as in the fireproof device of the fifth aspect of the present invention. And an intercalator interposed between both concave surfaces in a freely contacting manner. In this case, the interposer is convex downward on the lower surface as in the fireproof device of the sixth aspect of the present invention. The concave surface may be composed of a sliding body that is slidably in contact with the concave surface that is convex upward on the upper surface, and both the concave surface or the upper and lower surfaces of the sliding body may be composed of an exposed surface of a sliding layer made of a sliding material. Here, the sliding material forming the sliding layer may contain polytetrafluoroethylene resin as in the fireproof device of the seventh aspect of the present invention, and includes a sliding layer made of a sliding material. The fireproof joint, like the fireproof device of the eighth aspect of the present invention, in the softening or disappearance of the sliding layer, Preferably, it is made of an elastic body that shrinks in the vertical direction so that no gap is formed between the concave surface of the convex and the upper surface of the sliding body. Like the fireproof device of the ninth aspect of the invention, it may consist of a rolling body that is movably in contact with both concave surfaces.
[0011]
The seismic isolation device according to the present invention is interposed between a structure such as an office building, an apartment house, a detached house, or an art display case, and a base such as the ground, foundation, or base, on the base. Used for seismic isolation support of structures.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention will be described in detail with reference to the drawings showing preferred examples of the embodiments. The present invention is not limited to these embodiments.
[0013]
In FIG. 1 to FIG. 3, the seismic isolation device 2 of the present example in which the fireproof device 1 is used includes a lower rod 3, an upper rod 4 movably arranged in the horizontal direction H and the vertical direction V on the lower rod 3, The upper and lower ridges 3 and 3 so as to isolate the vibration of the upper ridge 4 in the horizontal direction H based on the vibration of the lower ridge 3 in the horizontal direction due to the earthquake along with the vertical movement of the upper ridge 4. 4 and a seismic isolation mechanism 5 interposed between them.
[0014]
The lower rod 3 is a rectangular lower anchor plate 13 fixed to the upper surface 12 of a rectangular parallelepiped base 11 as a base by a bolt or the like, and a rectangular shape fixed to the upper surface 14 of the lower anchor plate 13 by a bolt or the like. The lower substrate 15 and a disk-like lower slide receiving plate 17 fixed to the upper surface 16 of the lower substrate 15 with bolts or the like are provided.
[0015]
The upper rod 4 has a rectangular upper anchor plate 23 fixed to the lower surface 22 of the display case 21 as a structure by bolts and the like, and a rectangular upper anchor plate fixed to the lower surface 24 of the upper anchor plate 23 by bolts and the like. A substrate 25 and a disk-shaped upper slide receiving plate 27 fixed to the lower surface 26 of the upper substrate 25 with bolts or the like are provided.
[0016]
The lower rod 3 may be configured by omitting either the lower anchor plate 13 or the lower substrate 15, and further, by omitting both the lower anchor plate 13 and the lower substrate 15, the lower slide receiving plate 17 may be formed. It may be configured to be directly fixed to the upper surface 12 of the base 11 with bolts or the like, and in any case, the lower slide receiving plate 17 may be fixed to the base 11 to form the lower rod 3. The upper collar 4 is the same, and the upper collar 4 may be configured by omitting either the upper anchor plate 23 or the upper substrate 25. Furthermore, both the upper anchor plate 23 and the upper substrate 25 may be formed. The upper slide receiving plate 27 may be directly fixed to the lower surface 22 of the display case 21 with bolts or the like. In any case, the upper slide receiving plate 27 is fixed to the display case 21 to constitute the upper lid 4. do it.
[0017]
The seismic isolation mechanism 5 includes a downwardly convex concave surface 32 formed on the upper surface 31 of the lower slip receiving plate 17, an upward convex concave surface 34 formed on the lower surface 33 of the upper slip receiving plate 27, and a downward convexity. The lower surface 35, which is a convex surface, is slidably in contact with the concave surface 32, and the upper surface 36, which is an upward convex surface, is slidably in contact with the concave surface 32. The concave surface 32 is exposed to a sliding layer formed by applying a sliding material such as polytetrafluoroethylene resin to the concave surface formed on the upper surface 31 of the lower sliding receiving plate 17. The concave surface 34 is also composed of an exposed surface of the sliding layer formed by applying a sliding material such as polytetrafluoroethylene resin to the concave surface formed on the lower surface 33 of the upper sliding receiving plate 27, and thus, The concave surface 32 is formed by being fixed to the lower collar 3, and the concave surface 3 It is formed by fixing the upper shoe 4. In the sliding body 37, each of the lower surface 35 and the upper surface 36 has a shape complementary to each of the concave surfaces 32 and 34 so as to come into surface contact with each of the concave surfaces 32 and 34. The lower surface 35, the upper surface 36, and the concave surfaces 32 and 34 in the example have the same curvature radius and are part of a spherical surface.
[0018]
Instead of or together with the formation of the sliding layer on the concave surfaces of the upper surface 31 and the lower surface 33 of the lower sliding plate 17 and the upper sliding plate 27, the polytetra- A sliding layer including a fluoroethylene resin and a filler may be applied to form a sliding layer, and the exposed surface of the sliding layer may be brought into sliding contact with the concave surfaces 32 and 34, respectively.
[0019]
The refractory device 1 includes a lower refractory wall 41 surrounding the seismic isolation mechanism 5 and attached to the lower heel 3 side, and an upper refractory wall surrounding the seismic isolation mechanism 5 and attached to the upper heel 4 side. 42 and surrounding the periphery of the seismic isolation mechanism 5 and attached to either the upper end surface 43 of the lower refractory wall 41 or the lower end surface 44 of the upper refractory wall 42, in this example, the lower end surface 44. In addition, either the upper end surface 43 of the lower refractory wall 41 or the lower end surface 44 of the upper refractory wall 42, in this example, the upper end surface 43 slidably contacts with the lower surface 46 in the horizontal direction H, A fireproof joint 45 is provided between the upper end surface 43 and the lower end surface 44 and is extensible in the vertical direction V.
[0020]
The lower refractory wall 41 is composed of four refractory boards 51 to 54 that are separable from each other, and each of the refractory boards 51 to 54 is detachably fixed to each end face of the lower anchor plate 13 with bolts or the like. The upper refractory wall 42 is also composed of four refractory boards 55 to 58 in this example that can be separated from each other, like the lower refractory wall 41. Each is detachably fixed to each end face of the upper anchor plate 23 with bolts or the like and attached to the upper collar 4 side. Each of the refractory boards 51 to 54 and 55 to 58 is made of a refractory material such as ceramic fiber or glass fiber.
[0021]
Instead of being fixed to the lower anchor plate 13, the lower fire wall 41 may be detachably fixed to any one of the base 11, the lower substrate 15, and the lower slide receiving plate 17. Similarly, instead of being fixed to the upper anchor plate 23, it may be detachably fixed to any of the base 21, the upper substrate 25, and the upper slide receiving plate 27.
[0022]
The fireproof joint 45 is composed of four joint bars 61 to 64 like the upper fireproof wall 42, and each of the joint bars 61 to 64 is formed on the lower surface of the corresponding fireproof board 55 to 58 on the lower surface. A projection 68 integrally formed on the upper surface of each of the joint rods 61 to 64 is fitted and attached to the recessed groove 65. Each of the joint rods 61 to 64 is separated from the lower rod 3 of the upper rod 4 in the vertical direction H so that no vertical gap is formed between the upper end surface 43 and the concave surfaces 32 and 34 by heating. Refractory material mainly composed of ceramic fiber or glass fiber that expands and contracts in the vertical direction H so that no gap is generated between the concave surface 34 and the upper surface 36 of the sliding body 37 even when the sliding layer softens or disappears. It consists of an elastic body containing.
[0023]
In the above example, the lower refractory wall 41, the upper refractory wall 42, and the refractory joint 45 are divided into refractory boards 51 to 54, refractory boards 55 to 58, and joint rods 61 to 64, which can be separated from each other for ease of construction and maintenance. However, instead of this, any one of them may be formed as an integral molded product.
[0024]
In the seismic isolation device 2 in which the base 11 is installed on the floor of the building, when the earthquake does not occur, the upper arm 4 moves in the horizontal direction H and the vertical direction V with respect to the lower arm 3, as shown in FIG. Without exhibiting, the display case 21 is supported. When the floor of the building vibrates in the horizontal direction H due to an earthquake, the upper arm 4 moves relative to the lower arm 2 in the horizontal direction H and the vertical direction V as shown in FIG. Thus, the vibration of the display case 21 due to the vibration in the horizontal direction H of the earthquake is isolated. Then, in this seismic isolation operation of the seismic isolation device 2, the fireproof device 1 causes the lower end surface 46 of the fireproof joint 45 to slide in the horizontal direction H with respect to the upper end surface 43 of the lower fireproof wall 41 and the fireproof joint 45 is in the vertical direction V. It is allowed to move in the horizontal direction H and the vertical direction V with respect to the lower eyelid 3 of the upper eyelid 4.
[0025]
In the event of a fire, the fireproof device 1 includes the lower fireproof wall 41, the upper fireproof wall 42, and the fireproof joint 45 surrounding the seismic isolation mechanism 5, thereby forming a thermally insulated space 70 around the seismic isolation mechanism 5. Heating of the seismic isolation mechanism 5 can be suppressed, the seismic isolation mechanism 5 is prevented from being exposed to a flame, and the seismic isolation device 2 including the seismic isolation mechanism 5 is preferably prevented from being melted or burnt down.
[0026]
In other words, according to the fireproof device 1, the upper and lower fireproof walls 42 and 41 surrounding the seismic isolation mechanism 5 are provided, and the upper end surface 43 of the lower fireproof wall 41 is surrounded by the seismic isolation mechanism 5. In order to provide a refractory joint 45 which is slidably contacted in the horizontal direction H and is extendable in the vertical direction V interposed between the upper end surface 43 and the lower end surface 44, It can be isolated from the outside by the upper and lower refractory walls 42 and 41 and the fireproof joint 45, can insulate the space 70 surrounded by the upper and lower refractory walls 42 and 41 and the fireproof joint 45, and preferably prevent the flame from entering the space 70 Thus, the seismic isolation mechanism 5 can be prevented from being exposed to high temperatures, flames, etc. in a fire, and the seismic isolation mechanism 5 is not excessively heated. 4 relative horizontal directions H and And to maintain the mobility of the straight direction V, and Thus, does not lower the seismic isolation function of the seismic isolation mechanism 5.
[0027]
Further, since the fireproof joint 45 is made of an elastic body extending in the vertical direction V, even if the seismic isolation mechanism 5 in the fire is separated from the lower arm 3 by the thermal expansion of the seismic isolation mechanism 5, As a result of preventing a vertical gap V from being formed between the upper end surface 43 and the lower end surface 46 of the fireproof joint 45, the space 70 surrounded by the upper and lower fireproof walls 42 and 41 and the fireproof joint 45 is further reliably insulated. In addition, it is possible to more preferably prevent the flame from entering the space 70.
[0028]
In the above, the seismic isolation device 2 is configured to include the sliding body 37 as an intercalator, but instead, as illustrated in FIGS. 4 and 5, cylindrical rolling bodies 71 to 74 are included as the intercalator. Thus, the seismic isolation device 75 may be configured. The seismic isolation device 75 includes the lower heel 3 and the upper ridge 4, an intermediate sliding receiving plate 76 that is an upper ridge for the lower ridge 3 and a lower ridge for the upper ridge 4, In order to isolate the vibration in the direction H1 of the intermediate slide receiving plate 76 based on the vibration in one direction H1 of the horizontal direction H of the rod 3 with the vertical movement of the intermediate slide receiving plate 76, The seismic isolation mechanism 77 interposed between the intermediate slip receiving plates 76 and the upper collar 4 based on the vibration of the intermediate slip receiving plate 76 caused by the earthquake in the other direction H2 orthogonal to the one direction H1 in the horizontal direction H. A seismic isolation mechanism 78 interposed between the intermediate slide receiving plate 76 and the upper rod 4 is provided so as to isolate the vibration in the direction H2 from the upper rod 4 with vertical movement.
[0029]
The seismic isolation mechanism 77 is arranged on the upper surface 31 of the lower slide receiving plate 17 so as to be aligned in the H1 direction, and is formed on the lower surface 83 of the intermediate slide receiving plate 76 in the H1 direction. Two concave surfaces 84 and 85 formed on the upper surface, the concave surface 81 and the concave surface 84, and the concave surface 82 and the concave surface 85 are movably contacted with each other, and between the concave surface 81 and the concave surface 84 and the concave surface. The rolling elements 71 and 72 as the intervening elements interposed between the concave surface 82 and the concave surface 85 are provided, and the seismic isolation mechanism 78 is formed on the upper surface 86 of the intermediate slide receiving plate 76 in the H2 direction. Two downwardly convex concave surfaces 87 and 88, two upwardly convex concave surfaces 89 and 90 formed side by side in the H2 direction on the lower surface 33 of the upper slide receiving plate 27, and the concave surface 87 and the concave surface 89, respectively. And the concave surface 88 and the concave surface 90 are in rolling contact with each other, Has and a rolling member 73 and 74 of the of the intermediate has been interposed element to and between the concave 88 and the concave 90 between the surface 87 and the concave 89. The concave surfaces 81, 82, 84, 85, 87, 88, 89, and 90 in this example have the same radius of curvature and are part of a cylindrical surface.
[0030]
Similarly to the above, the fireproof device 1 for the seismic isolation device 75 shown in FIGS. 4 and 5 prevents the seismic isolation device 75 from being exposed to the flame, and includes the seismic isolation devices 77 and 78. Is preferably prevented from melting and burning.
[0031]
Moreover, in FIG.1 and FIG.2, although comprising the disk-shaped upper side slide receiving plate 27 and the disk-shaped slide body 37, the seismic isolation apparatus 2 was comprised, as shown in FIG. The seismic isolation device 95 may be configured by including a cylindrical upper sliding receiving member 93 and a sliding body 94 in which two hemispherical bodies serving as interposing elements are integrated. The upper slide receiving member 93 is fixed to the center of the lower surface 26 of the upper substrate 25 by welding or the like on the upper surface 96, and the lower surface 97 has a curvature radius sufficiently smaller than the curvature radius of the concave surface 32. A concave surface 98 made of a part of a convex spherical surface is formed, and the sliding body 94 is a convex convex surface having a curvature radius identical to the curvature radius of the concave surface 32, and is formed from a part of the spherical surface. A lower surface 99, and an upper surface 100 which is sufficiently smaller than the radius of curvature of the lower surface 99 and has the same radius of curvature as that of the concave surface 98, and is a convex convex surface which is part of a spherical surface. The lower surface 99 is in sliding contact with the concave surface 32, and the upper surface 100 is in sliding contact with the concave surface 98. Also for such a seismic isolation device 95, the fireproof device 1 can prevent the seismic isolation device 95 from being exposed to a flame as described above, and can preferably prevent the seismic isolation device 95 from being melted or burnt down.
[0032]
【The invention's effect】
According to the present invention, there is provided a fireproof device for a seismic isolation device capable of preventing the seismic isolation mechanism from being exposed to high temperatures, flames and the like without degrading the seismic isolation function of the seismic isolation mechanism. be able to.
[Brief description of the drawings]
FIG. 1 is a cross-sectional explanatory view of a preferred example of a preferred embodiment of the present invention.
2 is a cross-sectional view taken along the line II-II in the example shown in FIG.
3 is an operation explanatory diagram of the example shown in FIG. 1, and is a view taken along the line III-III.
FIG. 4 is a cross-sectional explanatory view of another preferred example of a preferred embodiment of the present invention.
5 is a VV arrow view of the example shown in FIG.
FIG. 6 is a cross-sectional explanatory view of still another preferred example of a preferred embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fireproof device 2 Seismic isolation device 3 Lower arm 4 Upper arm 5 Seismic isolation mechanism 41 Lower fire wall 42 Upper fire wall 45 Fireproof joint

Claims

The lower arm, the upper arm movably arranged in the horizontal and vertical directions on the lower arm, and the horizontal vibration of the upper arm based on the horizontal vibration of the lower arm caused by an earthquake are moved up and down on the upper arm. A fireproof device for a seismic isolation device having a seismic isolation mechanism interposed between the upper and lower ridges so as to be seismically isolated with A lower fire wall that is fixedly attached, an upper fire wall that is fixedly attached to the upper heel side and surrounding the seismic isolation mechanism, and that surrounds the seismic isolation mechanism and A fireproof joint that is attached to the lower end surface and slidably contacts the upper end surface of the lower fire wall in the horizontal direction and is vertically stretchable between the upper end surface and the lower end surface. The fireproof joint is vertical so that there is no gap between it and the upper end surface of the lower fireproof wall. It is made of an elastic body extending in the direction and contains a refractory material mainly composed of ceramic fiber or glass fiber, and is formed on the lower end surface of the upper fire wall and on the lower surface of the upper fire wall. A fireproof device in which a protrusion formed integrally with the upper surface of the fireproof joint is fitted into the groove and attached.

The fireproof device according to claim 1, wherein the upper and lower fireproof walls are made of a fireproof board containing ceramic fiber or glass fiber.

The seismic isolation mechanism consists of a convex concave surface fixed to the lower arm, a convex convex surface fixed to the upper arm, and an interposer interposed between the concave surfaces in contact with both concave surfaces. The fireproof device according to claim 1, comprising:

The interposer consists of a sliding body that is slidably in contact with the concave surface that protrudes downward on the lower surface and the concave surface that protrudes upward on the upper surface. The fireproof device according to claim 3, comprising an exposed surface of the layer.

The fireproof device according to claim 4, wherein the sliding material forming the sliding layer contains a polytetrafluoroethylene resin.

The fireproof joint is made of an elastic body that shrinks in the vertical direction so that no gap is formed between the concave surface that is convex upward and the upper surface of the sliding body even when the sliding layer is softened or lost. 5. A fireproofing device according to 5.

The fireproof device according to claim 3, wherein the intercalator is formed of a rolling body that is in rolling contact with both concave surfaces.

A seismic isolation device comprising the fireproof device according to any one of claims 1 to 7.