JP2004204631A

JP2004204631A - Vibration isolating mount for building structure

Info

Publication number: JP2004204631A
Application number: JP2002377415A
Authority: JP
Inventors: Takashi Uchiyama; 高内山; Yuji Kaida; 優二開田
Original assignee: Sumitomo Riko Co Ltd
Current assignee: Sumitomo Riko Co Ltd
Priority date: 2002-12-26
Filing date: 2002-12-26
Publication date: 2004-07-22
Anticipated expiration: 2022-12-26
Also published as: JP3888583B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration isolating mount for a building structure surely preventing positional deviation without a great change in a thin type structure. <P>SOLUTION: The vibration isolating mount comprises a first supporting base plate 1 seated on a floor material, a second supporting base plate 2 disposed at a distance apart from the first supporting base plate 1 and seated on a floor beam, and a vibration isolating structure 3 disposed between the first supporting base plate 1 and the second supporting base plate 2, integrally connecting them to each other and formed into a flat and thin type. The first supporting base plate 1 is projected from the seated surface on the floor material inserted into a through hole formed in the floor material and has a cylindrical fastening portion 1a with a female screw 1b whose internal circumference a fastening bolt is threadedly engaged with. The second supporting base plate 2 is projected from the seated surface of the floor beam inserted into a through hole formed in the floor beam and has a cylindrical fastening portion 2a with a female screw portion 2b whose internal circumference a fastening bolt is threadedly engaged with. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば一般住宅等の建築構造物の床梁と床材との間に設置されて、その床材を防振支持する建築構造物用防振マウントに関する。
【０００２】
【従来の技術】
一般住宅等においては、床に飛び跳ねや踏み台からの降下等による衝撃が加わると振動が発生し、その振動が不快音や不快震動等の原因となることから問題となる。さらに、戸建住宅やマンション等においては、居室や廊下の床に発生する振動や衝撃音が階下に直接的に伝搬されるため、階下の住人にとっては甚だしい騒音となる場合がある。
【０００３】
そこで、一般住宅等の床に発生する振動を抑制するために、従来より種々の対策が講じられており、例えば建築構造物用防振マウントとして特許文献１等に開示されているような液体封入式防振装置が知られている。この液体封入式防振装置は、一般に、床梁及び床材のいずれか一方の取付相手部材に固定される第１取付部材と、床梁及び床材のいずれか他方の取付相手部材に固定される第２取付部材と、第１取付部材と第２取付部材との間に介在して両部材を一体的に連結し、その内部に液体が封入される液室を有するゴム弾性体と、前記液室を主液室と副液室とに仕切り且つその二つの液室を連通するオリフィス付きの仕切部材と、から構成されている。
【０００４】
この液体封入式防振装置は、例えば第１取付部材を床パネル枠に固定するとともに、第２取付部材を床梁に固定することにより、床パネルと床梁との間に複数のものが配設され、その床パネルを弾性支持するように取付けられる。そして、床パネルに飛び跳ねや踏み台からの降下等による衝撃が加わって振動が発生すると、ゴム弾性体が上下に圧縮変形することによりその衝撃が緩和されるとともに、二つの液室の容積変化に伴ってオリフィスを流動する液体の液柱共振作用によりその振動が効果的に吸収されるようになっている。
【０００５】
【特許文献１】
特開平９−７２０３５号公報
【０００６】
【発明が解決しようとする課題】
ところで、上記のような液体封入式防振装置は、多くの部品で構成され且つ構造が複雑になっていることから、製造が煩雑となり、コスト上昇を招く要因となっていた。そこで、本出願人は、簡易な構造にすることによりコンパクト化を図り、コストの低減化を可能にした液体封入式防振装置を提案した（特願２００２−０５６４２９号）。この液体封入式防振装置は、上記従来の液体封入式防振装置における第１取付部材及び第２取付部材を廃止して構造の簡略化を図るとともに、扁平状で横幅に対して高さ（振動入力方向）の方が小さくなる薄型の構造にしたものである。よって、液体封入式防振装置により弾性支持される床材の配置位置を低くして、より大きな居住空間を確保することが可能である。
【０００７】
しかし、この液体封入式防振装置は、床梁に設けられた凹部内に設置したり、接着剤や粘着テープ等を用いて床梁に固定することによりその位置ずれを防止することができるが、床梁や床材に過大な振動が入力したときには位置ずれする恐れがある。液体封入式防振装置が適切な設置箇所から位置ずれしてしまうと、その液体封入式防振装置による良好な振動低減効果が期待できなくなる。
【０００８】
本発明は上記実状に鑑みてなされたものであり、薄型構造の大幅な変更を伴うことなく、より確実に位置ずれを防止できるようにした建築構造物用防振マウントを提供することを解決すべき課題とするものである。
【０００９】
【課題を解決するための手段、発明の作用及び効果】
上記課題を解決する請求項１記載の発明は、建築構造物の床梁と床材との間に設置されて該床材を防振支持する防振マウントであって、前記床梁及び前記床材のいずれか一方に着座する第１支持基板と、該第１支持基板と距離を隔てて配置されて前記床梁及び前記床材のいずれか他方に着座する第２支持基板と、前記第１支持基板と前記第２支持基板との間に配置されて両部材を一体的に連結し、高さと横幅の比が１：２から１：１０の範囲で扁平状の薄型に形成された防振構造体と、から構成され、前記第１及び第２支持基板の少なくともどちらか一方は、前記床梁及び前記床材の少なくともどちらか一方への着座面から突出して前記床梁及び前記床材の少なくともどちらか一方に設けられた貫通孔内に挿入され、その内周に取付ボルトが螺合される雌ねじ部をもつ筒状の締結部を有するという手段を採用している。
【００１０】
本発明の建築構造物用防振マウントは、床梁と床材との間に、第１支持基板及び第２支持基板が床梁と床材とにそれぞれ着座するようにして設置される。このとき、第１支持基板及び第２支持基板にそれぞれ設けられた締結部が、床梁及び床材にそれぞれ設けられた貫通孔内に挿入されており、その締結部の内周に設けられた雌ねじ部に取付ボルトを螺合して締結することにより、第１支持基板及び第２支持基板が床梁と床材とにそれぞれ強固に固定される。そのため、床梁や床材に過大な振動が入力したときにも、防振マウントの位置ずれがより確実に防止される。これにより、防振マウントによる振動や衝撃音の低減効果を良好に発揮できる状態が維持される。
【００１１】
また、第１及び第２支持基板に設けられる締結部は、第１支持基板と第２支持基板の間に設けられる防振構造体の構造に影響することなく設けることができるので、防振構造体の薄型構造を有効に活用することが可能である。さらに、この締結部は、大幅な構造変更を伴うことなく設けることができるので、コストの上昇が最小限に抑制される。
【００１２】
したがって、本発明の建築構造物用防振マウントは、薄型構造の大幅な変更を伴うことなく、より確実に位置ずれを防止できるようにすることができる。
【００１３】
請求項２記載の発明は、請求項１記載の発明における前記締結部が、前記貫通孔の長さよりも短い長さに形成されているという手段を採用している。
【００１４】
この手段によれば、締結部の全体が貫通孔内に収納された状態になるので、締結部に取付ボルトが締結されることによって、防振マウントを床梁及び床材にガタツキがないように確実に固定することができる。
【００１５】
請求項３記載の発明は、請求項１又は２記載の発明における前記防振構造体が、内部に液体が封入される液室を形成するゴム弾性部材と、前記液室を主液室と副液室とに仕切り且つそれらの液室どうしを連通するオリフィス通路を形成する仕切部材とを有するという手段を採用している。
【００１６】
この手段を採用した防振構造体は、オリフィス通路を流動する液体の液柱共振作用により、飛び跳ねや踏み台からの下降によって発生する振動の周波数域（１０〜１００Ｈｚ）において低い動ばね定数を有するように容易にチューニングすることができるため、より良好な衝撃音低減効果を得ることができる。また、この防振構造体は、歩行振動の周波数域（１０〜３０Ｈｚ）において大きな減衰係数を有するため、良好な歩行感を得ることができる。
【００１７】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づき説明する。
【００１８】
〔実施形態１〕
図１は本実施形態に係る建築構造物用防振マウントの断面図であって図２のＩ−Ｉ線矢視断面図であり、図２はその防振マウントの平面図である。
【００１９】
本実施形態の防振マウントは、図１及び図２に示すように、床材に着座し、その内周に雌ねじ部１ｂ、１ｂをもつ２個の円筒状の第１締結部１ａ、１ａを有する第１支持基板１と、第１支持基板と距離を隔てて配置されて床梁に着座し、その内周に雌ねじ部２ｂ、２ｂをもつ２個の円筒状の第２締結部２ａ、２ａを有する第２支持基板２と、第１支持基板１と第２支持基板２との間に配置されて両部材を一体的に連結する扁平状で薄型の防振構造体３と、から構成されている。
【００２０】
第１支持基板１は、硬質樹脂（ガラス繊維（４０重量％）を含有するポリプロピレン）により薄い円板状に形成されており、その一方の平坦な面が床材に着座してその床材を支持する着座面とされている。この着座面の中心から径方向外方へ寄った軸対称位置となる２箇所には、着座面から軸方向に突出する円筒状の第１締結部１ａ、１ａが一体に設けられている。この第１締結部１ａ、１ａの内周面には、取付ボルト（図示せず）が螺合される雌ねじ部１ｂ、１ｂが設けられている。この第１締結部１ａ、１ａは、第１支持基板１が床材に着座したときに床材に設けられた貫通孔内に挿入されるものであって、その貫通孔の長さよりも短い長さに形成されている。
【００２１】
第２支持基板２は、第１支持基板１と同じ硬質樹脂により薄いリング板状に形成されており、その一方の面がこれと同じ形状に形成された防振構造体３の支持部材３３の一端面に結合されて一体化された状態に設けられている。この第２支持基板２は、他方の平坦な面が床梁に着座する着座面とされており、その着座面の軸対称位置となる２箇所には、着座面から軸方向に突出する円筒状の第２締結部２ａ、２ａが一体に設けられている。この第２締結部２ａ、２ａの内周面には、取付ボルト（図示せず）が螺合される雌ねじ部２ｂ、２ｂが設けられている。この第２締結部２ａ、２ａは、第２支持基板２が床梁に着座したときに床梁に設けられた貫通孔内に挿入されるものであって、その貫通孔の長さよりも短い長さに形成されている。
【００２２】
防振構造体３は、円板状の仕切部材３１と、仕切部材３１の一方面に対向するように配置されて仕切部材３１との間に主液室３２ｄを形成するゴム製の弾性支持部材３２と、仕切部材３１の他方面に接合するように配置されて仕切部材３１との間に第１及び第２オリフィス通路３３ｇ、３３ｈを形成する硬質樹脂製の肉厚円筒状の支持部材３３と、支持部材３３の内周部にその外周縁部を保持されて仕切部材３１との間に副液室３４ｄを形成するゴム製のダイヤフラム３４と、弾性支持部材３２に固着されて支持部材３３との間に仕切部材３１を挟んだ状態で弾性支持部材３２と支持部材３３とを締結する締結部材３５とから構成されている。
【００２３】
仕切部材３１は、第１及び第２支持基板１、２と同じ硬質樹脂により円板状に形成された１枚のプレートで構成されている。この仕切部材３１の中央部には、一方面側（主液室３２ｄ側）に突出するように湾曲した円形の湾曲部３１ａが形成されている。仕切部材３１の湾曲部３１ａの外側にある平坦部の所定部位（第１及び第２オリフィス通路３３ｇ、３３ｈの始端となる２箇所の部位）には、厚さ方向に貫通する第１及び第２導入孔３１ｂ、３１ｃが設けられている。
【００２４】
弾性支持部材３２は、ゴム材料（天然ゴム）を加硫成形することにより一端が開口する短い円筒状に形成されており、一端から他端に向かって次第に小径となるように傾斜した短い円筒状の筒状支持部３２ａと、筒状支持部３２ａの他端部開口を閉塞する閉塞部３２ｂとからなる。この弾性支持部材３２は、筒状支持部３２ａの開口側端面が締結部材３５のリング状基部３５ａに加硫接着されており、そのリング状基部３５ａを間に介して仕切部材３１の外周平坦部に対向する状態で仕切部材３１と同軸状に配置されている。これにより、弾性支持部材３２の内部、即ち、閉塞部３２ｂと仕切部材３１との間には主液室３２ｄが形成され、この主液室３２ｄには、例えば水やエチレングリコール等の非圧縮性の液体Ｌが封入されている。なお、閉塞部３２ｂは、第１支持基板１と略同じ大きさに形成されており、その外面が第１支持基板１の着座面と反対側の面に接着剤で固着されている。
【００２５】
支持部材３３は、第２支持基板２等と同じ硬質樹脂により短い厚肉円筒状に形成されている。この支持部材３３は、その一端面がこれと同じ形状に形成された第２支持基板２の一端面に一体に結合されている。なお、この支持部材３３の剛性は、ゴムよりなる弾性支持部材３２の剛性よりも大きく、両者の間に剛性差が設定されている。この支持部材３３は、短い肉厚円筒状に形成された筒状本体部３３ａと、筒状本体部３３ａの一端部から径方向外方へ延出するリング状のフランジ部３３ｂとからなる。この支持部材３３は、筒状本体部３３ａの一端面が仕切部材３１の平面部に当接した状態で仕切部材３１と同軸状に配置されている。
【００２６】
この支持部材３３の一端面には、周方向に沿って円弧状に延びる第１及び第２オリフィス溝３３ｃ、３３ｄが設けられている。この第１及び第２オリフィス溝３３ｃ、３３ｄは、仕切部材３１に設けられた第１及び第２導入孔３１ｂ、３１ｃと対応する部分を始端とし、筒状本体部３３ａの一端面上で円周方向において略１／２周する位置まで延びている。第１及び第２オリフィス溝３３ｃ、３３ｄの終端部には、筒状本体部３３ａの内周側に貫通するようにして形成された第１及び第２導出孔３３ｅ、３３ｆが設けられている。
【００２７】
この第１及び第２オリフィス溝３３ｃ、３３ｄは、筒状本体部３３ａの一端面に当接された仕切部材３１によってその開口部が覆蓋されている。これにより、筒状本体部３３ａと仕切部材３１との間には、第１及び第２導入孔３１ｂ、３１ｃと第１及び第２導出孔３３ｅ、３３ｆを介して主液室３２ｄと副液室３４ｄとを連通する第１及び第２オリフィス通路３３ｇ、３３ｈが形成されている。この第１及び第２オリフィス通路３３ｇ、３３ｈは、低減を目的とする振動周波数に合わせて、その通路長さや断面積が適宜設定される。
【００２８】
そして、筒状本体部３３ａの一端面の第１及び第２オリフィス溝３３ｃ、３３ｄの外側には、シール用のＯリング３３ｉが配置される凹溝３３ｊが周方向に一周するように設けられている。また、筒状本体部３３ａの内周面の他端部には、径方向内方へ突出するリング状の段部３３ｋが設けられている。
【００２９】
ダイヤフラム３４は、ゴム材料（ブチルゴム）を加硫成形することにより形成されたものであり、円筒状の取付基部３４ａと、薄膜でドーム形状に形成されて取付基部３４ａの一端部にその外周縁部が保持された本体部３４ｂとからなる。このダイヤフラム３４は、支持部材３３と一体成形されることにより形成されており、支持部材３３の段部３３ｋに本体部３４ｂの外周縁部が位置する状態で、支持部材３３の内周面に取付基部３４ａが加硫接着されて取付けられている。なお、取付基部３４ａの第１及び第２導出孔３３ｅ、３３ｆと対応する部分には開口部３４ｃが形成されている。これにより、ダイヤフラム３４と仕切部材３１との間には、第１及び第２オリフィス通路３３ｇ、３３ｈを介して主液室３２ｄと連通し、主液室３２ｄと同じ非圧縮性の液体Ｌが封入された副液室３４ｄが形成されている。なお、このダイヤフラム３４の本体部３４ｂの剛性は、弾性支持部材３２の剛性よりも小さくなるように設定されている。
【００３０】
締結部材３５は、仕切部材３１や支持部材３３と同じ硬質樹脂によりリング状に形成されており、リング状基部３５ａと、リング状基部３５ａの外周端部から軸方向に延出し、その先端に支持部材３３のフランジ部３３ｂの端面エッジに係合する爪３５ｃ、…を有する８個の係合部３５ｂ、…とからなる。
【００３１】
リング状基部３５ａは、支持部材３３のフランジ部３３ｂの外周径と略同じ外周径を有する大きさに形成されている。このリング状基部３５ａの一方面（支持部材３３のフランジ部３３ｂと対向する面）には、フランジ部３３ｂとの溶着時に利用される複数の周方向に延びる突条ビード３５ｄ、…が周方向に適宜距離を隔てて断続的に設けられている。そして、係合部３５ｂ、…は、リング状基部３５ａの外周端よりも外方へ突出するようにして、周方向に等間隔に設けられている。この係合部３５ｂ、…は、その内面が支持部材３３のフランジ部３３ｂ外周面と接触する状態で、その先端に設けられた爪３５ｃ、…が支持部材３３のフランジ部３３ｂの端面エッジに係合するように設けられている。
【００３２】
この締結部材３５は次のようにして取付けられている。即ち、主液室３２ｄ及び副液室３４ｄに封入すべき液体Ｌ中において、弾性支持部材３２の筒状支持部３２ａと支持部材３３の筒状本体部３３ａとの間に仕切部材３１を挟んだ状態にセットし、締結部材３５のリング状基部３５ａを弾性支持部材３２のフランジ部３２ｃの軸方向外方に配置する。そして、リング状基部３５ａの内周部で弾性支持部材３２のフランジ部３２ｃの外周部を保持するようにして、支持部材３３のフランジ部３３ｂの外側に係合部３５ｂ、…の先端部（爪３５ｃ、…）を放射方向に弾性変形させつつ嵌合させる。これにより、係合部３５ｂ、…の爪３５ｃ、…がフランジ部３３ｂの端面エッジに到達すると弾性復帰してその端面エッジに係合することにより、仮止めの状態に組付けられる。
【００３３】
その後、仮止め状態の組付け体を大気中に取出してから或いはそのまま液体Ｌ中において、リング状基部３５ａに設けられた突条ビード３５ｄ、…を利用して、例えば超音波溶着や振動溶着等の手段によりリング状基部３５ａとフランジ部３３ｂとを溶着させる。これにより、弾性支持部材３２の筒状支持部３２ａと支持部材３３の筒状本体部３３ａとの間に仕切部材３１の外周端部が挟まれた状態で、弾性支持部材３２と支持部材３３とが強固に締結される。また、これと同時に、リング状基部３５ａと筒状本体部３３ａとの接合面が、凹溝３３ｊに配置されたＯリング３３ｉにより封止されることから、主副液室３２ｄ、３４ｄ並びに第１及び第２オリフィス通路３３ｇ、３３ｈ内の液体Ｌが漏洩しないように確実に封止される。
【００３４】
以上のように構成された防振構造体３は、高さが約２５ｍｍ、横幅（外径）が約１２０ｍｍの大きさの円盤形状に形成されており、高さと横幅の比が１：４．８となる扁平状の薄型に形成されている。即ち、この防振構造体３は、締結部材３５の外径である横幅に対して、支持部材３３の下端面から弾性支持部材３２の上端面までの高さ（振動入力方向）の方が小さくなる薄型の構造とされている。
【００３５】
以上のように構成された本実施形態の防振マウントは、例えば図３に示すように、一般住宅等の建築構造物の床梁４と床材（床パネル５、５及び連結部材６）との間に設置されて、その床材を防振支持するように使用される。この場合、床梁４はＨ型鋼が用いられており、防振マウントが着座する床梁４上面の所定部位には、防振マウントの第２締結部２ａ、２ａが挿入される貫通孔４ａ、４ａが設けられている。
【００３６】
床パネル５、５は、軽量発泡コンクリート（ＡＬＣ）製であり複数のものが用いられる。この床パネル５、５は、２列に並列状に配置されてその列間で対向する端部どうしがＴ型鋼よりなる連結部材６で連結されている。即ち、この連結部材６は、連結部材６を間に挟んで対向する２枚の床パネル５、５のそれぞれの側面と下面とに接触する状態に取付けられている。そして、連結部材６の防振マウントが着座する部位には、防振マウントの第１締結部１ａ、１ａが挿入される貫通孔６ａ、６ａが設けられているとともに、その貫通孔６ａ、６ａと連続するようにして床パネル５、５にも厚さ方向に貫通する貫通孔５ａ、５ａが設けられている。
【００３７】
上記床梁４及び床パネル５、５に対して防振マウントを取付けるには、先ず、床梁４に設けられた貫通孔４ａ、４ａ内に、防振マウントの第２締結部２ａ、２ａを挿入させて、第２支持基板２下面が床梁４上面に着座するように防振マウントを設置する。そして、貫通孔４ａ、４ａ内に挿入された第２締結部２ａ、２ａの雌ねじ部２ｂ、２ｂに取付ボルト４ｂ、４ｂを螺合させて締結する。これにより、第２締結部２ａ、２ａの長さが貫通孔４ａ、４ａの長さよりも短いことから、第２締結部２ａ、２ａの全体が貫通孔４ａ、４ａ内に収納された状態になっているため、取付ボルト４ｂ、４ｂが締結されることによって、防振マウントが床梁４にガタツキがないように強固に固定される。このようにして、床梁４上の適数箇所に防振マウントが固定された状態で設置される。
【００３８】
次に、床梁４に固定された各防振マウントの第１支持基板１上に、連結部材６に設けられた貫通孔６ａ、６ａ内に第１支持基板１の第１締結部１ａ、１ａが挿入されるようにして床パネル５、５を載置する。これにより、連結部材６下面に防振マウントの第１支持基板１上面が着座して、防振マウントにより連結部材６及び床パネル５、５が支持される状態となる。その状態で、床パネル５、５の貫通孔５ａ、５ａから取付ボルト５ｂ、５ｂを挿入して、第１締結部１ａ、１ａの雌ねじ部１ｂ、１ｂに取付ボルト５ｂ、５ｂを螺合させて締結する。このようにして、連結部材６及び床パネル５、５が防振マウントに固定された状態に配設され、床パネル５、５の施工作業が終了する。
【００３９】
なお、図４に示すように、複数の床パネル５、５を連結する連結部材６として、１列に配置された床パネル５、５どうしのみを取付ボルト５ｃ、５ｃにより連結するＣ型鋼が用いられる場合がある。この場合には、防振マウントの第１支持基板１に設けられている２個の第１締結部１ａ、１ａは、第１支持基板１上に載置される２本のＣ型鋼のそれぞれに、連結ボルト５ｃ、５ｃ挿通用の貫通孔６ｃ、６ｃとは別に設けられた貫通孔６ａ、６ａに挿入されて、取付ボルト６ｂ、６ｂと締結される。なお、この場合にも、第１締結部１ａ、１ａの長さが連結部材６の貫通孔６ａ、６ａの長さよりも短いことから、第１締結部１ａ、１ａの全体が貫通孔６ａ、６ａ内に収納された状態になっているため、取付ボルト６ｂ、６ｂが締結されることによって、防振マウントが連結部材６にガタツキがないように強固に固定される。
【００４０】
また、複数の床パネル５、５を連結部材６によって連結することなく防振マウント上に直接載置する場合には、防振マウントの第１支持基板１に設けられた第１締結部１ａ、１ａが各床パネル５、５に設けられた貫通孔５ａ、５ａに挿入されて、防振マウントと床パネル５、５が直接固定される。この場合には、全ての床パネル５、５が防振マウントに支持されるように、必要個数の防振マウントが床梁４上に設置される。
【００４１】
なお、本実施形態の防振マウントは、通常、図３及び図４に示すように、第１支持基板１が上方（床材側）となり、第２支持基板２が下方（床梁側）となるように設置されるが、上下反転した状態に設置することも可能である。
【００４２】
以上のようにして本実施形態の防振マウントが設置された床構造において、床パネル５、５に歩行や作業に伴う衝撃が加わって振動が発生すると、防振構造体３の弾性支持部材３２が上下方向に圧縮されて弾性変形することによってその衝撃が緩和される。これと同時に、弾性支持部材３２及びダイヤフラム３４の弾性変形により主液室３２ｄ及び副液室３４ｄの容積が変化し、この容積変化に伴って第１及び第２オリフィス通路３３ｇ、３３ｈを流動する液体Ｌの液柱共振作用によりその振動が効果的に吸収される。
【００４３】
なお、このとき、弾性支持部材３２の筒状支持部３２ａの剛性が支持部材３３の剛性よりも小さくされているため、主液室３２ｄの容積変化が大きくなって第１及び第２オリフィス通路３３ｇ、３３ｈを流動する液体Ｌの流動量が増大することから、液柱共振作用が促進される。また、筒状支持部３２ａが一端から他端に向かって次第に傾斜するように形成されていることから筒状支持部３２ａが内側に倒れ易いため、主液室３２ｄの容積変化が促進される。その結果、床パネル５、５の振動や衝撃音が有効に低減される。
【００４４】
また、床梁４や床パネル５、５に過大な振動が入力したときには、防振マウントは、第１支持基板１に設けられた第１締結部１ａ、１ａにより床パネル５、５の連結部材６と強固に固定され、第２支持基板２に設けられた第２締結部２ａ、２ａにより床梁４と強固に固定されているため、より確実に位置ずれが防止される。これにより、防振マウントによる振動や衝撃音の低減効果を良好に発揮できる状態が維持される。
【００４５】
以上のように、本実施形態の防振マウントによれば、第１及び第２支持基板１、２が、床梁４及び連結部材６に設けられた貫通孔４ａ、６ａ内に挿入され、その内周に取付ボルト４ｂ、６ｂが螺合される雌ねじ部１ｂ、２ｂをもつ筒状の第１及び第２締結部１ａ、２ａを有するため、床梁４や床パネル５、５に過大な振動が入力したときにも、より確実に位置ずれを防止することができる。
【００４６】
この第１及び第２締結部１ａ、２ａは、第１支持基板１と第２支持基板２の間に設けられる防振構造体３の構造に影響することなく設けることができるので、防振構造体３の薄型構造を有効に活用することができる。また、この第１及び第２締結部１ａ、２ａは、防振マウントの大幅な構造変更を伴うことなく設けることができるので、コストの上昇を最小限に抑制することができる。さらに、この第１及び第２締結部１ａ、２ａは、貫通孔４ａ、６ａの長さよりも短い長さに形成されているため、取付ボルト４ｂ、５ｂが締結されることによって、防振マウントを床梁４及び連結部材６にガタツキがないように強固に固定することができる。
【００４７】
なお、第１及び第２締結部１ａ、２ａの雌ねじ部１ｂ、２ｂは、本実施形態では、第１及び第２締結部１ａ、２ａの内周面に直接雌ねじを切ることにより形成されているが、他の方法として、例えば、第１及び第２締結部１ａ、２ａを樹脂成形してする際に、その内周面に雌ねじが形成されている金属製のナット等をインサートして雌ねじ部を設けるようにしてもよい。
【００４８】
また、本実施形態における防振構造体３は、第１及び第２オリフィス通路３３ｇ、３３ｈを流動する液体Ｌの液柱共振作用により、飛び跳ねや踏み台からの下降によって発生する振動の周波数域（１０〜１００Ｈｚ）において低い動ばね定数を有するように容易にチューニングすることができるため、より良好な衝撃音低減効果を得ることができる。さらに、この防振構造体３は、歩行振動の周波数域（１０〜３０Ｈｚ）において大きな減衰係数を有するため、良好な歩行感を得ることができる。
【００４９】
なお、本実施形態において採用されている液体封入式の防振構造体３は、所定の大きさの薄型となる範囲内であれば、その内部構造等を適宜変更することが可能である。例えば、第１及び第２オリフィス通路３３ｇ、３３ｈの位置や本数等を変更したり、弾性支持部材３２と支持部材３３とを締結する締結部材３５の締結構造を変更したりすることができる。また、液体封入式のものに代えて、ブロック状のゴム弾性体のみで構成される防振構造体にしてもよい。
【００５０】
〔実施形態２〕
図５は本実施形態に係る建築構造物用防振マウントの断面図であって図６のＶ−Ｖ線矢視断面図であり、図６はその防振マウントの平面図である。
【００５１】
本実施形態の防振マウントは、図５及び図６に示すように、床材に着座し、その内周に雌ねじ部１１ｂをもつ１個の円筒状の第１締結部１１ａを有する第１支持基板１と、第１支持基板と距離を隔てて配置されて床梁に着座し、その内周に雌ねじ部２ｂ、２ｂをもつ２個の円筒状の第２締結部２ａ、２ａを有する第２支持基板２と、第１支持基板１と第２支持基板２との間に配置されて両部材を一体的に連結する扁平状で薄型の防振構造体３と、から構成されている。
【００５２】
この防振マウントは、実施形態１のものと基本的構成が同じであり、第１支持基板１１のみが異なるものである。よって、実施形態１のものと同一に構成された第２支持基板２及び防振構造体３についての詳しい説明は省略し、以下、異なる点を中心に説明する。
【００５３】
本実施形態の第１支持基板１１は、鉄系金属により実施形態１の第１支持基板１よりも薄い円板状に形成されたものであり、その一方の面が床材に着座してその床材を支持する平坦な着座面とされている。この着座面の中心部位には、着座面から軸方向に突出するようにして、円筒状に形成された第１締結部１１ａの一端面が溶接により固着されている。この第１締結部１１ａの内周面には、取付ボルト（図示せず）が螺合される雌ねじ部１１ｂが設けられている。なお、この第１締結部１１ａは、第１支持基板１１が床材に着座したときに床材に設けられた貫通孔内に挿入されるものであって、その貫通孔の長さよりも短い長さに形成されている。
【００５４】
以上のように構成された本実施形態の防振マウントは、実施形態１の場合と同様に、例えば図７に示すように、一般住宅等の建築構造物の床梁４と床材（ＡＬＣ製の床パネル５、５及び連結部材６）との間に設置されて使用される。この場合、Ｈ型鋼よりなる床梁４の防振マウントが設置される部位は、２個の防振マウントの設置スペースを確保するために、ブラケット４１、４１を取付けることにより横幅が拡張されている。そして、防振マウントが着座する床梁４上面の所定部位には、防振マウントの第２締結部２ａ、２ａが挿入される貫通孔４ａ、４ａが設けられている。
【００５５】
床パネル５、５を連結する連結部材６は、１列に配置された床パネル５、５どうしのみを連結するＬ型鋼が用いられている。この連結部材６は、１列に配置された床パネル５、５の側面と下面とに接触する状態に取付けられている。そして、連結部材６の防振マウントが着座する部位には、防振マウントの第１締結部１１ａが挿入される貫通孔６ａが設けられているとともに、その貫通孔６ａと連続するようにして床パネル５、５にも厚さ方向に貫通する貫通孔５ａ、５ａが設けられている。
【００５６】
上記床梁４及び床パネル５、５に対して防振マウントを取付けるには、先ず、床梁４に設けられた貫通孔４ａ、４ａ内に、防振マウントの第２締結部２ａ、２ａを挿入させて、第２支持基板２下面が床梁４上面に着座するように防振マウントを設置する。この場合、床梁４上に載置される両方の床パネル５、５をそれぞれ支持するように２個の防振マウントを設置する。そして、貫通孔４ａ、４ａ内に挿入された第２締結部２ａ、２ａの雌ねじ部２ｂ、２ｂに取付ボルト４ｂ、４ｂを螺合させて締結する。これにより、第２締結部２ａ、２ａの長さが貫通孔４ａ、４ａの長さよりも短いことから、取付ボルト４ｂ、４ｂが締結されることによって、防振マウントが床梁４にガタツキがないように強固に固定される。このようにして、床梁４上の適数箇所に防振マウントが固定された状態で設置される。
【００５７】
次に、床梁４に固定された各防振マウントの第１支持基板１１上に、連結部材６に設けられた貫通孔６ａ、６ａ内に第１支持基板１１の第１締結部１１ａが挿入されるようにして床パネル５、５を載置する。これにより、連結部材６下面に防振マウントの第１支持基板１１上面が着座して、防振マウントにより連結部材６及び床パネル５、５が支持される状態となる。その状態で、床パネル５、５の貫通孔５ａ、５ａから取付ボルト５ｂ、５ｂを挿入して、第１締結部１１ａの雌ねじ部１１ｂに取付ボルト５ｂ、５ｂを螺合させて締結する。このようにして、連結部材６及び床パネル５、５が防振マウントに固定された状態に配設され、床パネル５、５の施工作業が終了する。
【００５８】
なお、図８に示すように、連結部材６としてＬ型鋼に代えてＣ型鋼が用いられる場合には、前記と同様に、防振マウントの第１支持基板１１に設けられている第１締結部１１ａは、第１支持基板１１上に載置される２本のＣ型鋼のそれぞれに連結ボルト５ｃ、５ｃ挿通用の貫通孔６ｃ、６ｃとは別に設けられた貫通孔６ａ、６ａに挿入されて、取付ボルト６ｂ、６ｂと締結される。なお、この場合にも、第１締結部１１ａの長さが連結部材６の貫通孔６ａ、６ａの長さよりも短いことから、取付ボルト６ｂ、６ｂが締結されることによって、防振マウントが連結部材６にガタツキがないように強固に固定される。
【００５９】
また、複数の床パネル５、５を連結部材６によって連結することなく防振マウント上に載置する場合には、前記と同様に、防振マウントの第１支持基板１に設けられた第１締結部１ａ、１ａが各床パネル５、５に設けられた貫通孔５ａ、５ａに挿入されて、防振マウントと床パネル５、５が直接固定される。
【００６０】
以上のようにして本実施形態の防振マウントが設置された床構造においては、防振マウントによる良好な振動や衝撃音の低減効果が得られるとともに、床梁４や床パネル５、５に過大な振動が入力したときにも、防振マウントの位置ずれをより確実に防止することができるなど、実施形態１の場合と同様の作用・効果を奏する。
【００６１】
また、本実施形態における第１支持基板１１は、鉄系金属により形成されていることから、硬質樹脂により形成された実施形態１の第１支持基板１に比べて、十分な強度を確保した上で薄くすることができる。そのため、防振マウントのの実質的な高さ（第１支持基板１１の着座面と第２支持基板２の着座面との間の距離）を、実施形態１の場合よりも低くすることができる。
【図面の簡単な説明】
【図１】本発明の実施形態１に係る建築構造物用防振マウントの断面図であって図２のＩ−Ｉ線矢視断面図である。
【図２】本発明の実施形態１に係る建築構造物用防振マウントの平面図である。
【図３】本発明の実施形態１に係る建築構造物用防振マウントを床梁と床材との間に設置した状態を示す断面図である。
【図４】本発明の実施形態１に係る建築構造物用防振マウントを床梁と他の床材との間に設置した状態を示す断面図である。
【図５】本発明の実施形態２に係る建築構造物用防振マウントの断面図であって図６のＶ−Ｖ線矢視断面図である。
【図６】本発明の実施形態２に係る建築構造物用防振マウントの平面図である。
【図７】本発明の実施形態２に係る建築構造物用防振マウントを床梁と床材との間に設置した状態を示す断面図である。
【図８】本発明の実施形態２に係る建築構造物用防振マウントを床梁と他の床材との間に設置した状態を示す断面図である。
【符号の説明】
１、１１…第１支持基板１ａ、１１ａ…第１締結部
１ｂ、１１ｂ…雌ねじ部２…第２支持基板２ａ…第２締結部
２ｂ…雌ねじ部３…防振構造体３１…仕切部材
３１ａ…湾曲部３１ｂ…第１導入孔３１ｃ…第２導入孔
３２…弾性支持部材３２ａ…筒状支持部３２ｂ…閉塞部
３２ｄ…主液室３３…支持部材３３ａ…筒状本体部
３３ｂ…フランジ部３３ｃ…第１オリフィス溝
３３ｄ…第２オリフィス溝３３ｅ…第１導出孔
３３ｆ…第２導出孔３３ｇ…第１オリフィス通路
３３ｈ…第２オリフィス通路３３ｉ…Ｏリング３３ｊ…凹溝
３３ｋ…段部３４…ダイヤフラム３４ａ…取付基部
３４ｂ…本体部３４ｄ…副液室３５…締結部材
３５ａ…リング状基部３５ｂ…係合部３５ｃ…爪
３５ｄ…突条ビード４…床梁４ａ…貫通孔
４ｂ…取付ボルト４１…ブラケット５…床パネル
５ａ…貫通孔５ｂ…取付ボルト５ｃ…連結ボルト
６…連結部材６ａ…貫通孔６ｂ…取付ボルトＬ…液体[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an anti-vibration mount for a building structure installed between a floor beam and a floor material of a building structure such as a general house and supporting the floor material in a vibration-proof manner.
[0002]
[Prior art]
In a general house or the like, vibration is generated when an impact is applied to a floor by jumping or dropping from a step, and the vibration causes a problem such as unpleasant noise or uncomfortable vibration. Furthermore, in a detached house or a condominium, the vibration or impact sound generated on the floor of a living room or corridor is directly transmitted to the downstairs, which may be a significant noise for residents downstairs.
[0003]
Therefore, various measures have been taken in the past to suppress the vibration generated on the floor of a general house or the like. For example, liquid sealing as disclosed in Patent Document 1 or the like as an anti-vibration mount for a building structure is used. 2. Description of the Related Art A type of vibration isolator is known. In general, the liquid filled type vibration damping device is fixed to a first mounting member fixed to one of a floor beam and a floor material, and fixed to a second mounting member of the floor beam and the floor material. A second elastic member having a liquid chamber interposed between the first and second mounting members to integrally connect the two members and having a liquid sealed therein; And a partition member with an orifice for partitioning the liquid chamber into a main liquid chamber and a sub liquid chamber and communicating the two liquid chambers.
[0004]
In this liquid filled type vibration damping device, for example, by fixing the first mounting member to the floor panel frame and fixing the second mounting member to the floor beam, a plurality of devices are arranged between the floor panel and the floor beam. And is mounted to elastically support the floor panel. When shock is applied to the floor panel due to jumping or dropping from the platform, vibration is generated, and the rubber elastic body is compressed and deformed up and down, so that the shock is alleviated and the volume of the two liquid chambers is changed. The vibration is effectively absorbed by the liquid column resonance action of the liquid flowing through the orifice.
[0005]
[Patent Document 1]
JP-A-9-72035
[0006]
[Problems to be solved by the invention]
By the way, since the liquid-filled type vibration damping device as described above is composed of many parts and has a complicated structure, the manufacturing becomes complicated and causes an increase in cost. Therefore, the present applicant has proposed a liquid-filled type vibration damping device that is made compact by adopting a simple structure and that can reduce the cost (Japanese Patent Application No. 2002-056429). This liquid-filled type vibration damping device eliminates the first mounting member and the second mounting member in the above-mentioned conventional liquid-filled type vibration damping device, simplifies the structure, and is flat and has a height relative to the width. (Vibration input direction) has a thin structure that is smaller. Therefore, it is possible to secure a larger living space by lowering the position of the floor material elastically supported by the liquid-filled type vibration damping device.
[0007]
However, this liquid filled type vibration damping device can be prevented from being displaced by being installed in a concave portion provided on the floor beam or fixed to the floor beam using an adhesive or an adhesive tape. When excessive vibration is input to the floor beam or the floor material, the position may be shifted. If the liquid-filled type vibration damping device is displaced from an appropriate installation location, a good vibration reduction effect by the liquid-filled type vibration damping device cannot be expected.
[0008]
SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and has as its object to provide a vibration-proof mount for a building structure capable of more reliably preventing displacement without accompanying a significant change in a thin structure. Should be an issue to be addressed
[0009]
Means for Solving the Problems, Functions and Effects of the Invention
The invention according to claim 1, which solves the above problem, is a vibration-proof mount that is installed between a floor beam and a floor material of a building structure and supports the floor material in a vibration-proof manner. A first support substrate seated on one of the members, a second support substrate disposed at a distance from the first support substrate and seated on one of the floor beam and the floor material, and A vibration isolator disposed between the support substrate and the second support substrate, integrally connecting the two members, and formed in a flat and thin shape with a ratio of height to width in a range of 1: 2 to 1:10. And at least one of the first and second support substrates protrudes from a seating surface on at least one of the floor beam and the floor material, and is provided with the floor beam and the floor material. At least one of them is inserted into the through hole provided, and the mounting bolt is It employs a means of having a tubular fastening portion having a female thread portion to be engaged.
[0010]
The anti-vibration mount for a building structure according to the present invention is installed between the floor beam and the floor material such that the first support substrate and the second support substrate are seated on the floor beam and the floor material, respectively. At this time, the fastening portions provided on the first support substrate and the second support substrate, respectively, are inserted into the through holes provided on the floor beam and the floor material, respectively, and are provided on the inner periphery of the fastening portions. The first support substrate and the second support substrate are firmly fixed to the floor beam and the floor material, respectively, by screwing and fastening the mounting bolt to the female screw portion. Therefore, even when excessive vibration is input to the floor beam or the floor material, the displacement of the anti-vibration mount is more reliably prevented. As a result, a state where the effect of reducing the vibration and the impact sound by the anti-vibration mount can be sufficiently exhibited is maintained.
[0011]
Further, the fastening portions provided on the first and second support substrates can be provided without affecting the structure of the vibration isolating structure provided between the first support substrate and the second support substrate. It is possible to effectively utilize the thin structure of the body. Furthermore, since the fastening portion can be provided without a significant structural change, an increase in cost is suppressed to a minimum.
[0012]
Therefore, the anti-vibration mount for architectural structures of the present invention can more reliably prevent the displacement without accompanying a significant change in the thin structure.
[0013]
The invention according to claim 2 employs a means in which the fastening portion in the invention according to claim 1 is formed to have a length shorter than the length of the through hole.
[0014]
According to this means, since the entire fastening portion is housed in the through hole, the mounting bolt is fastened to the fastening portion so that the anti-vibration mount does not rattle on the floor beams and the floor material. It can be fixed securely.
[0015]
According to a third aspect of the present invention, in the first or second aspect of the present invention, the vibration isolating structure includes a rubber elastic member forming a liquid chamber in which a liquid is sealed, and the liquid chamber includes a main liquid chamber and a sub liquid chamber. And a partition member that forms an orifice passage that separates the liquid chambers from each other and connects the liquid chambers to each other.
[0016]
The vibration isolating structure employing this means has a low dynamic spring constant in the frequency range (10 to 100 Hz) of the vibration generated by jumping or descending from the step due to the liquid column resonance action of the liquid flowing through the orifice passage. Since the tuning can be easily performed, a better impact noise reduction effect can be obtained. Further, since the vibration-proof structure has a large attenuation coefficient in the frequency range of walking vibration (10 to 30 Hz), a good walking feeling can be obtained.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0018]
[Embodiment 1]
FIG. 1 is a cross-sectional view of an anti-vibration mount for a building structure according to the present embodiment, which is a cross-sectional view taken along line II of FIG. 2, and FIG. 2 is a plan view of the anti-vibration mount.
[0019]
As shown in FIGS. 1 and 2, the anti-vibration mount of the present embodiment includes two cylindrical first fastening portions 1 a and 1 a which are seated on a floor material and have internal thread portions 1 b and 1 b on the inner periphery thereof. A first support substrate 1 and two cylindrical second fastening portions 2a, 2a arranged at a distance from the first support substrate, seated on a floor beam, and having internal thread portions 2b, 2b on the inner periphery thereof. And a flat and thin anti-vibration structure 3 disposed between the first support substrate 1 and the second support substrate 2 and integrally connecting the two members. ing.
[0020]
The first support substrate 1 is formed of a hard resin (polypropylene containing glass fiber (40% by weight)) in the shape of a thin disk, and one flat surface of the first support substrate 1 is seated on a floor material to remove the floor material. It is a seating surface to support. Cylindrical first fastening portions 1a, 1a projecting in the axial direction from the seating surface are integrally provided at two locations that are axially symmetrical positions radially outward from the center of the seating surface. On the inner peripheral surfaces of the first fastening portions 1a, 1a, female screw portions 1b, 1b into which mounting bolts (not shown) are screwed are provided. The first fastening portions 1a, 1a are inserted into the through holes provided in the floor material when the first support substrate 1 is seated on the floor material, and have a length shorter than the length of the through hole. Is formed.
[0021]
The second support substrate 2 is formed of the same hard resin as the first support substrate 1 in a thin ring plate shape, and one surface of the support member 33 of the vibration isolating structure 3 having the same shape as this. It is connected to one end face and provided in an integrated state. The second support substrate 2 has a flat surface on the other side as a seating surface for sitting on the floor beam, and two axially symmetric positions of the seating surface are provided with cylindrical cylindrical members protruding in the axial direction from the seating surface. Are provided integrally with each other. On the inner peripheral surfaces of the second fastening portions 2a, 2a, female screw portions 2b, 2b into which mounting bolts (not shown) are screwed are provided. The second fastening portions 2a, 2a are inserted into the through holes provided in the floor beam when the second support substrate 2 is seated on the floor beam, and have a length shorter than the length of the through hole. Is formed.
[0022]
The vibration isolation structure 3 is a disc-shaped partition member 31 and a rubber elastic support member that is disposed to face one surface of the partition member 31 and forms a main liquid chamber 32 d between the partition member 31 and the partition member 31. 32, a thick cylindrical support member 33 made of hard resin, which is disposed so as to be joined to the other surface of the partition member 31 and forms first and second orifice passages 33g and 33h between the partition member 31 and A rubber diaphragm 34 whose outer peripheral edge is held by the inner peripheral portion of the support member 33 to form a sub liquid chamber 34 d between the partition member 31 and the support member 33 fixed to the elastic support member 32. And a fastening member 35 for fastening the elastic support member 32 and the support member 33 with the partition member 31 interposed therebetween.
[0023]
The partition member 31 is formed of a single plate formed of the same hard resin as the first and second support substrates 1 and 2 in a disk shape. At the center of the partition member 31, a circular curved portion 31a that is curved so as to protrude toward one surface side (the main liquid chamber 32d side) is formed. A first portion and a second portion penetrating in the thickness direction are provided at predetermined portions of the flat portion outside the curved portion 31a of the partition member 31 (two portions at the start ends of the first and second orifice passages 33g and 33h). Introducing holes 31b and 31c are provided.
[0024]
The elastic support member 32 is formed into a short cylindrical shape with one end opened by vulcanizing and molding a rubber material (natural rubber), and has a short cylindrical shape that is inclined so as to gradually decrease in diameter from one end to the other end. And a closing portion 32b for closing the opening at the other end of the cylindrical supporting portion 32a. The elastic supporting member 32 has an opening-side end face of the cylindrical supporting portion 32a vulcanized and bonded to a ring-shaped base 35a of the fastening member 35, and the outer peripheral flat portion of the partition member 31 is interposed between the ring-shaped base 35a. Are arranged coaxially with the partition member 31 in a state of facing. As a result, a main liquid chamber 32d is formed inside the elastic support member 32, that is, between the closing part 32b and the partition member 31, and the main liquid chamber 32d has an incompressible material such as water or ethylene glycol. Of liquid L is enclosed. The closing portion 32b is formed to have substantially the same size as the first support substrate 1, and the outer surface thereof is fixed to the surface of the first support substrate 1 opposite to the seating surface with an adhesive.
[0025]
The support member 33 is formed of the same hard resin as that of the second support substrate 2 and the like in a short thick-walled cylindrical shape. The support member 33 is integrally connected to one end surface of the second support substrate 2 having one end surface formed in the same shape. The rigidity of the support member 33 is greater than the rigidity of the elastic support member 32 made of rubber, and a difference in rigidity is set between the two. The support member 33 includes a cylindrical main body 33a formed into a short, thick cylindrical shape, and a ring-shaped flange 33b extending radially outward from one end of the cylindrical main body 33a. The support member 33 is arranged coaxially with the partition member 31 in a state where one end surface of the cylindrical main body 33a is in contact with the flat portion of the partition member 31.
[0026]
On one end surface of the support member 33, first and second orifice grooves 33c and 33d extending in an arc shape along the circumferential direction are provided. The first and second orifice grooves 33c and 33d are formed with a portion corresponding to the first and second introduction holes 31b and 31c provided in the partition member 31 as a starting end, and have a circumferential shape on one end surface of the cylindrical main body 33a. In the direction, it extends to a position that makes about a half turn. The first and second orifice grooves 33c, 33d have first and second outlet holes 33e, 33f formed at the end portions thereof so as to penetrate the inner peripheral side of the cylindrical main body 33a.
[0027]
The openings of the first and second orifice grooves 33c and 33d are covered by a partition member 31 that is in contact with one end surface of the cylindrical main body 33a. Thereby, the main liquid chamber 32d and the sub liquid chamber are provided between the cylindrical main body 33a and the partition member 31 via the first and second introduction holes 31b and 31c and the first and second outlet holes 33e and 33f. First and second orifice passages 33g and 33h are formed to communicate with the first orifice 34d. The first and second orifice passages 33g and 33h have their passage lengths and cross-sectional areas appropriately set in accordance with the vibration frequency to be reduced.
[0028]
Outside the first and second orifice grooves 33c and 33d on one end surface of the cylindrical main body 33a, a concave groove 33j in which an O-ring 33i for sealing is arranged is provided so as to make a round in the circumferential direction. I have. At the other end of the inner peripheral surface of the cylindrical main body 33a, there is provided a ring-shaped step 33k protruding radially inward.
[0029]
The diaphragm 34 is formed by vulcanizing a rubber material (butyl rubber), and has a cylindrical mounting base 34a and a dome-shaped thin film formed at one end of the mounting base 34a. And a main body part 34b holding the main body 34b. The diaphragm 34 is formed by being integrally formed with the support member 33, and is attached to the inner peripheral surface of the support member 33 in a state where the outer peripheral edge of the main body 34 b is located at the step 33 k of the support member 33. The base 34a is attached by vulcanization bonding. An opening 34c is formed in a portion of the mounting base 34a corresponding to the first and second outlet holes 33e and 33f. Thus, the non-compressible liquid L, which is in communication with the main liquid chamber 32d, is sealed between the diaphragm 34 and the partition member 31 via the first and second orifice passages 33g and 33h. The formed sub liquid chamber 34d is formed. The rigidity of the main body 34b of the diaphragm 34 is set to be smaller than the rigidity of the elastic support member 32.
[0030]
The fastening member 35 is formed in a ring shape from the same hard resin as the partition member 31 and the support member 33, and extends in the axial direction from a ring-shaped base portion 35a and an outer peripheral end of the ring-shaped base portion 35a. It has eight engaging portions 35b, which have claws 35c,... Which engage with the end face edges of the flange portion 33b of the member 33.
[0031]
The ring-shaped base portion 35a is formed to have a size having substantially the same outer diameter as the outer diameter of the flange portion 33b of the support member 33. On one surface of the ring-shaped base portion 35a (the surface facing the flange portion 33b of the support member 33), a plurality of circumferentially extending ridge beads 35d used for welding with the flange portion 33b are provided in the circumferential direction. It is provided intermittently at an appropriate distance. The engaging portions 35b are provided at equal intervals in the circumferential direction so as to protrude outward from the outer peripheral end of the ring-shaped base 35a. The engaging portions 35b,... Have their inner surfaces in contact with the outer peripheral surface of the flange portion 33b of the support member 33, and the claws 35c,. It is provided to match.
[0032]
This fastening member 35 is attached as follows. That is, in the liquid L to be sealed in the main liquid chamber 32d and the sub liquid chamber 34d, the partition member 31 is sandwiched between the cylindrical support portion 32a of the elastic support member 32 and the cylindrical main body portion 33a of the support member 33. In this state, the ring-shaped base 35a of the fastening member 35 is disposed axially outward of the flange 32c of the elastic support member 32. The outer peripheral portion of the flange portion 32c of the elastic support member 32 is held by the inner peripheral portion of the ring-shaped base portion 35a, and the distal end portions (claws) of the engaging portions 35b,. 35c,...) Are fitted while elastically deforming in the radial direction. Thereby, when the claws 35c,... Of the engaging portions 35b,... Reach the end face edge of the flange portion 33b, they return elastically and engage with the end face edge, so that they are temporarily assembled.
[0033]
After that, the temporarily assembled assembly is taken out into the atmosphere or directly in the liquid L, for example, by ultrasonic welding, vibration welding, or the like, using the ridge beads 35d provided on the ring-shaped base 35a. The ring-shaped base portion 35a and the flange portion 33b are welded by the means described above. Thereby, the elastic support member 32 and the support member 33 are connected to each other in a state where the outer peripheral end of the partition member 31 is sandwiched between the cylindrical support portion 32a of the elastic support member 32 and the cylindrical main body portion 33a of the support member 33. Are firmly fastened. At the same time, the joint surface between the ring-shaped base 35a and the cylindrical main body 33a is sealed by the O-ring 33i arranged in the concave groove 33j, so that the main and sub liquid chambers 32d, 34d and the first In addition, the liquid L in the second orifice passages 33g and 33h is securely sealed so as not to leak.
[0034]
The anti-vibration structure 3 configured as described above is formed in a disk shape having a height of about 25 mm and a width (outer diameter) of about 120 mm, and a ratio of height to width of 1: 4. 8 is formed in a flat and thin shape. That is, the height (vibration input direction) from the lower end surface of the support member 33 to the upper end surface of the elastic support member 32 is smaller than the lateral width that is the outer diameter of the fastening member 35. It has a thin structure.
[0035]
The anti-vibration mount of the present embodiment configured as described above is, for example, as shown in FIG. 3, the floor beams 4 and floor materials (floor panels 5, 5 and the connecting members 6) of a building structure such as a general house. It is used to support the floor material with vibration isolation. In this case, the floor beam 4 is made of H-shaped steel, and through holes 4a into which the second fastening portions 2a and 2a of the vibration isolation mount are inserted are provided at predetermined positions on the upper surface of the floor beam 4 where the vibration isolation mount is seated. 4a is provided.
[0036]
The floor panels 5, 5 are made of lightweight foamed concrete (ALC), and a plurality of floor panels are used. The floor panels 5, 5 are arranged in two rows in parallel, and opposite ends between the rows are connected by a connecting member 6 made of T-shaped steel. That is, the connecting member 6 is attached so as to be in contact with the respective side surfaces and lower surfaces of the two floor panels 5 facing each other with the connecting member 6 interposed therebetween. In addition, through holes 6a, 6a into which the first fastening portions 1a, 1a of the anti-vibration mount are inserted are provided at portions of the connecting member 6 where the anti-vibration mount is seated, and the through holes 6a, 6a Through holes 5a, 5a penetrating in the thickness direction are also provided in the floor panels 5, 5 so as to be continuous.
[0037]
In order to attach the anti-vibration mount to the floor beam 4 and the floor panels 5, 5, first, the second fastening portions 2a, 2a of the anti-vibration mount are inserted into through holes 4a, 4a provided in the floor beam 4. Then, the anti-vibration mount is installed so that the lower surface of the second support substrate 2 is seated on the upper surface of the floor beam 4. Then, the attachment bolts 4b, 4b are screwed into the female screw portions 2b, 2b of the second fastening portions 2a, 2a inserted into the through holes 4a, 4a, and fastened. Thereby, since the length of the second fastening portions 2a, 2a is shorter than the length of the through holes 4a, 4a, the entire second fastening portions 2a, 2a are housed in the through holes 4a, 4a. Thus, the mounting bolts 4b, 4b are fastened, so that the anti-vibration mount is firmly fixed so that the floor beam 4 does not rattle. In this way, the anti-vibration mounts are fixed at appropriate positions on the floor beams 4.
[0038]
Next, on the first support substrate 1 of each anti-vibration mount fixed to the floor beam 4, the first fastening portions 1a, 1a of the first support substrate 1 are inserted into through holes 6a, 6a provided in the connecting member 6. Are placed, and the floor panels 5, 5 are placed. As a result, the upper surface of the first support substrate 1 of the anti-vibration mount is seated on the lower surface of the connecting member 6, and the connecting member 6 and the floor panels 5, 5 are supported by the anti-vibration mount. In this state, the mounting bolts 5b, 5b are inserted from the through holes 5a, 5a of the floor panels 5, 5, and the mounting bolts 5b, 5b are screwed into the female screw portions 1b, 1b of the first fastening portions 1a, 1a. To conclude. In this way, the connecting member 6 and the floor panels 5 and 5 are disposed in a state of being fixed to the anti-vibration mount, and the work of installing the floor panels 5 and 5 is completed.
[0039]
In addition, as shown in FIG. 4, as the connecting member 6 for connecting the plurality of floor panels 5, 5, a C-shaped steel that connects only the floor panels 5, 5 arranged in one row only with the mounting bolts 5c, 5c is used. May be In this case, the two first fastening portions 1a, 1a provided on the first support substrate 1 of the anti-vibration mount are attached to each of the two C-beams mounted on the first support substrate 1. The connection bolts 5c, 5c are inserted into through holes 6a, 6a provided separately from the through holes 6c, 6c for insertion, and fastened to the mounting bolts 6b, 6b. Also in this case, since the length of the first fastening portions 1a, 1a is shorter than the length of the through holes 6a, 6a of the connecting member 6, the entire first fastening portions 1a, 1a are formed through the through holes 6a, 6a. In this state, the mounting bolts 6b, 6b are fastened, so that the anti-vibration mount is firmly fixed to the connecting member 6 without rattling.
[0040]
When the plurality of floor panels 5, 5 are directly mounted on the anti-vibration mount without being connected by the connecting member 6, the first fastening portions 1a provided on the first support substrate 1 of the anti-vibration mount, 1a is inserted into the through-holes 5a, 5a provided in each floor panel 5, 5, and the anti-vibration mount and the floor panels 5, 5 are directly fixed. In this case, a required number of vibration isolation mounts are installed on the floor beams 4 so that all the floor panels 5 are supported by the vibration isolation mounts.
[0041]
In addition, the anti-vibration mount of the present embodiment usually has the first support substrate 1 on the upper side (floor material side) and the second support substrate 2 on the lower side (floor beam side) as shown in FIGS. However, it is also possible to set upside down.
[0042]
In the floor structure in which the anti-vibration mount of the present embodiment is installed as described above, when the floor panels 5, 5 are subjected to an impact due to walking or work and vibration is generated, the elastic supporting members 32 of the anti-vibration structure 3 Are compressed in the vertical direction and elastically deformed, so that the impact is reduced. At the same time, the volumes of the main liquid chamber 32d and the sub liquid chamber 34d change due to the elastic deformation of the elastic support member 32 and the diaphragm 34, and the liquid flowing through the first and second orifice passages 33g and 33h is changed according to the volume change. The vibration is effectively absorbed by the liquid column resonance action of L.
[0043]
At this time, since the rigidity of the cylindrical support portion 32a of the elastic support member 32 is smaller than the rigidity of the support member 33, the volume change of the main liquid chamber 32d is large, and the first and second orifice passages 33g are formed. , 33h, the flow amount of the liquid L increases, and the liquid column resonance action is promoted. Further, since the cylindrical support portion 32a is formed so as to be gradually inclined from one end to the other end, the cylindrical support portion 32a is easily inclined inward, so that the volume change of the main liquid chamber 32d is promoted. As a result, vibration and impact noise of the floor panels 5, 5 are effectively reduced.
[0044]
When excessive vibration is input to the floor beams 4 and the floor panels 5, 5, the anti-vibration mount is connected to the connecting members of the floor panels 5, 5 by the first fastening portions 1 a, 1 a provided on the first support substrate 1. 6, and is firmly fixed to the floor beam 4 by the second fastening portions 2a, 2a provided on the second support substrate 2, so that misalignment is more reliably prevented. As a result, a state where the effect of reducing the vibration and the impact sound by the anti-vibration mount can be sufficiently exhibited is maintained.
[0045]
As described above, according to the anti-vibration mount of the present embodiment, the first and second support substrates 1 and 2 are inserted into the through holes 4 a and 6 a provided in the floor beam 4 and the connecting member 6, and Since there are cylindrical first and second fastening portions 1a and 2a having female screw portions 1b and 2b into which the mounting bolts 4b and 6b are screwed on the inner periphery, excessive vibration occurs on the floor beams 4 and the floor panels 5 and 5. Can be more surely prevented from being displaced even when is input.
[0046]
Since the first and second fastening portions 1a and 2a can be provided without affecting the structure of the vibration isolating structure 3 provided between the first support substrate 1 and the second support substrate 2, the vibration isolating structure can be provided. The thin structure of the body 3 can be effectively used. In addition, since the first and second fastening portions 1a and 2a can be provided without a significant structural change of the anti-vibration mount, an increase in cost can be suppressed to a minimum. Further, since the first and second fastening portions 1a, 2a are formed to have a length shorter than the length of the through holes 4a, 6a, the vibration-proof mount is formed by fastening the mounting bolts 4b, 5b. The floor beam 4 and the connecting member 6 can be firmly fixed without rattling.
[0047]
In the present embodiment, the female threads 1b, 2b of the first and second fastening parts 1a, 2a are formed by directly cutting female threads on the inner peripheral surfaces of the first and second fastening parts 1a, 2a. However, as another method, for example, when the first and second fastening portions 1a and 2a are formed by resin molding, a female nut or the like having a female screw formed on the inner peripheral surface thereof is inserted into the female screw portion. May be provided.
[0048]
In addition, the vibration isolation structure 3 in the present embodiment has a frequency range (10%) of vibration generated by jumping or dropping from the step platform due to the liquid column resonance effect of the liquid L flowing through the first and second orifice passages 33g and 33h. (Up to 100 Hz), it is possible to easily tune so as to have a low dynamic spring constant, so that a better impact noise reduction effect can be obtained. Furthermore, since the vibration-proof structure 3 has a large attenuation coefficient in the frequency range of walking vibration (10 to 30 Hz), a good walking feeling can be obtained.
[0049]
Note that the internal structure and the like of the liquid-filled vibration-proof structure 3 employed in the present embodiment can be appropriately changed as long as the vibration-proof structure 3 has a predetermined size and is thin. For example, the positions and numbers of the first and second orifice passages 33g and 33h can be changed, and the fastening structure of the fastening member 35 for fastening the elastic support member 32 and the support member 33 can be changed. Further, instead of the liquid sealing type, a vibration isolating structure composed of only a block-shaped rubber elastic body may be used.
[0050]
[Embodiment 2]
5 is a cross-sectional view of the anti-vibration mount for a building structure according to the present embodiment, which is a cross-sectional view taken along line VV of FIG. 6, and FIG. 6 is a plan view of the anti-vibration mount.
[0051]
As shown in FIGS. 5 and 6, the anti-vibration mount according to the present embodiment is a first support having one cylindrical first fastening portion 11a which is seated on a flooring material and has an internal thread 11b on its inner periphery. A second substrate having two cylindrical second fastening portions 2a, 2a having female threads 2b, 2b on the inner periphery thereof, which is disposed at a distance from the substrate 1 and the first support substrate and is seated on a floor beam. It comprises a support substrate 2 and a flat and thin anti-vibration structure 3 disposed between the first support substrate 1 and the second support substrate 2 and integrally connecting the two members.
[0052]
This anti-vibration mount has the same basic configuration as that of the first embodiment, and differs only in the first support substrate 11. Therefore, a detailed description of the second support substrate 2 and the vibration isolating structure 3 configured in the same manner as in the first embodiment will be omitted, and different points will be mainly described below.
[0053]
The first support substrate 11 of the present embodiment is formed of a ferrous metal into a disk shape thinner than the first support substrate 1 of the first embodiment, and one surface thereof is seated on a floor material and It is a flat seating surface that supports the floor material. One end surface of a first fastening portion 11a formed in a cylindrical shape is fixed to a central portion of the seating surface by welding so as to project in the axial direction from the seating surface. On the inner peripheral surface of the first fastening portion 11a, there is provided a female screw portion 11b to which a mounting bolt (not shown) is screwed. The first fastening portion 11a is inserted into a through hole provided in the floor material when the first support substrate 11 is seated on the floor material, and has a length shorter than the length of the through hole. Is formed.
[0054]
The anti-vibration mount of the present embodiment configured as described above, as in the case of Embodiment 1, for example, as shown in FIG. 7, uses a floor beam 4 and a floor material (manufactured by ALC) of a building structure such as a general house. Between the floor panels 5, 5 and the connecting member 6). In this case, the width of the portion of the floor beam 4 made of H-shaped steel where the anti-vibration mount is installed is expanded by attaching the brackets 41, 41 to secure the installation space for the two anti-vibration mounts. . Further, through holes 4a, 4a into which the second fastening portions 2a, 2a of the anti-vibration mount are inserted are provided at predetermined positions on the upper surface of the floor beam 4 on which the anti-vibration mount is seated.
[0055]
As the connecting member 6 for connecting the floor panels 5, 5, an L-shaped steel for connecting only the floor panels 5, 5 arranged in one row is used. The connecting members 6 are attached so as to be in contact with the side surfaces and lower surfaces of the floor panels 5, 5 arranged in a row. A through-hole 6a into which the first fastening portion 11a of the anti-vibration mount is inserted is provided at a portion of the connecting member 6 where the anti-vibration mount is seated, and the floor is connected to the through-hole 6a. The panels 5, 5 are also provided with through holes 5a, 5a penetrating in the thickness direction.
[0056]
In order to attach the anti-vibration mount to the floor beam 4 and the floor panels 5, 5, first, the second fastening portions 2a, 2a of the anti-vibration mount are inserted into through holes 4a, 4a provided in the floor beam 4. Then, the anti-vibration mount is installed so that the lower surface of the second support substrate 2 is seated on the upper surface of the floor beam 4. In this case, two anti-vibration mounts are installed so as to support the two floor panels 5 mounted on the floor beam 4 respectively. Then, the attachment bolts 4b, 4b are screwed into the female screw portions 2b, 2b of the second fastening portions 2a, 2a inserted into the through holes 4a, 4a, and fastened. Accordingly, since the length of the second fastening portions 2a, 2a is shorter than the length of the through holes 4a, 4a, the anti-vibration mount does not rattle on the floor beam 4 by fastening the mounting bolts 4b, 4b. Firmly fixed. In this way, the anti-vibration mounts are fixed at appropriate positions on the floor beams 4.
[0057]
Next, the first fastening portion 11a of the first support substrate 11 is inserted into the through holes 6a provided in the connecting member 6 on the first support substrate 11 of each anti-vibration mount fixed to the floor beam 4. So that the floor panels 5, 5 are placed. As a result, the upper surface of the first support substrate 11 of the anti-vibration mount is seated on the lower surface of the connecting member 6, and the connecting member 6 and the floor panels 5, 5 are supported by the anti-vibration mount. In this state, the mounting bolts 5b, 5b are inserted through the through holes 5a, 5a of the floor panels 5, 5, and the mounting bolts 5b, 5b are screwed into the female screw portion 11b of the first fastening portion 11a to be fastened. In this way, the connecting member 6 and the floor panels 5 and 5 are disposed in a state of being fixed to the anti-vibration mount, and the work of installing the floor panels 5 and 5 is completed.
[0058]
As shown in FIG. 8, when a C-shaped steel is used as the connecting member 6 instead of the L-shaped steel, the first fastening portion provided on the first support substrate 11 of the anti-vibration mount, as described above. 11a is inserted into the through-holes 6a, 6a provided separately from the through-holes 6c, 6c for inserting the connecting bolts 5c, 5c in the two C-shaped steels placed on the first support substrate 11, respectively. And the mounting bolts 6b, 6b. Also in this case, since the length of the first fastening portion 11a is shorter than the length of the through holes 6a, 6a of the connecting member 6, the anti-vibration mount is connected by fastening the mounting bolts 6b, 6b. The member 6 is firmly fixed without rattling.
[0059]
When the plurality of floor panels 5, 5 are mounted on the anti-vibration mount without being connected by the connecting member 6, the first panel provided on the first support substrate 1 of the anti-vibration mount is similar to the above. The fastening portions 1a, 1a are inserted into through holes 5a, 5a provided in the floor panels 5, 5, and the anti-vibration mount and the floor panels 5, 5 are directly fixed.
[0060]
As described above, in the floor structure in which the anti-vibration mount according to the present embodiment is installed, a favorable vibration and impact noise reduction effect can be obtained by the anti-vibration mount, and the floor beams 4 and the floor panels 5 and 5 are excessively large. The same operations and effects as those of the first embodiment are obtained, such as that the displacement of the anti-vibration mount can be more reliably prevented even when a strong vibration is input.
[0061]
In addition, since the first support substrate 11 in the present embodiment is formed of an iron-based metal, the first support substrate 11 has sufficient strength compared to the first support substrate 1 of the first embodiment formed of a hard resin. Can be thinned. Therefore, the substantial height of the anti-vibration mount (the distance between the seating surface of the first support substrate 11 and the seating surface of the second support substrate 2) can be made lower than in the first embodiment. .
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an anti-vibration mount for a building structure according to a first embodiment of the present invention, which is a cross-sectional view taken along line II of FIG. 2;
FIG. 2 is a plan view of an anti-vibration mount for a building structure according to Embodiment 1 of the present invention.
FIG. 3 is a cross-sectional view showing a state in which the anti-vibration mount for a building structure according to the first embodiment of the present invention is installed between a floor beam and a floor material.
FIG. 4 is a cross-sectional view showing a state in which the anti-vibration mount for a building structure according to the first embodiment of the present invention is installed between a floor beam and another floor material.
5 is a cross-sectional view of the anti-vibration mount for a building structure according to the second embodiment of the present invention, which is a cross-sectional view taken along line VV of FIG. 6;
FIG. 6 is a plan view of an anti-vibration mount for a building structure according to a second embodiment of the present invention.
FIG. 7 is a cross-sectional view showing a state in which a vibration isolating mount for a building structure according to a second embodiment of the present invention is installed between a floor beam and a floor material.
FIG. 8 is a cross-sectional view showing a state in which a vibration isolating mount for a building structure according to Embodiment 2 of the present invention is installed between a floor beam and another floor material.
[Explanation of symbols]
1, 11: first support substrate 1a, 11a: first fastening portion
1b, 11b: female screw portion 2: second support substrate 2a: second fastening portion
2b ... female screw part 3 ... vibration-proof structure 31 ... partition member
31a: curved portion 31b: first introduction hole 31c: second introduction hole
32: elastic support member 32a: tubular support portion 32b: closing portion
32d: Main liquid chamber 33: Support member 33a: Cylindrical main body
33b: flange portion 33c: first orifice groove
33d: second orifice groove 33e: first outlet hole
33f: second outlet hole 33g: first orifice passage
33h: second orifice passage 33i: O-ring 33j: concave groove
33k: Step 34: Diaphragm 34a: Mounting base
34b: body part 34d: sub liquid chamber 35: fastening member
35a: ring-shaped base 35b: engagement part 35c: claw
35d: ridge bead 4: floor beam 4a: through hole
4b: Mounting bolt 41: Bracket 5: Floor panel
5a: Through hole 5b: Mounting bolt 5c: Connecting bolt
Reference numeral 6: connecting member 6a: through hole 6b: mounting bolt L: liquid

Claims

An anti-vibration mount installed between a floor beam and a floor material of a building structure and supporting the floor material in an anti-vibration manner,
A first support substrate seated on one of the floor beam and the floor material,
A second support substrate disposed at a distance from the first support substrate and seated on one of the floor beam and the floor material;
It is disposed between the first support substrate and the second support substrate and integrally connects the two members, and is formed in a flat thin shape with a ratio of height to width in a range of 1: 2 to 1:10. And an anti-vibration structure,
At least one of the first and second support substrates is provided on at least one of the floor beam and the floor material so as to protrude from a seating surface on at least one of the floor beam and the floor material. An anti-vibration mount for a building structure, comprising: a cylindrical fastening portion having a female screw portion inserted into a through hole and having an inner periphery screwed with a mounting bolt.

The anti-vibration mount for a building structure according to claim 1, wherein the fastening portion is formed to have a length shorter than a length of the through hole.

The vibration damping structure includes a rubber elastic member that forms a liquid chamber in which liquid is sealed, and an orifice passage that divides the liquid chamber into a main liquid chamber and a sub liquid chamber and that communicates between the liquid chambers. The anti-vibration mount for a building structure according to claim 1, further comprising a partition member to be formed.