JP4041743B2 - Damping device and mounting method thereof - Google Patents

Damping device and mounting method thereof Download PDF

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Publication number
JP4041743B2
JP4041743B2 JP2003004791A JP2003004791A JP4041743B2 JP 4041743 B2 JP4041743 B2 JP 4041743B2 JP 2003004791 A JP2003004791 A JP 2003004791A JP 2003004791 A JP2003004791 A JP 2003004791A JP 4041743 B2 JP4041743 B2 JP 4041743B2
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Prior art keywords
transmission member
column
damping device
vibration damping
mounting
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JP2004218226A (en
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英治 市川
純二 橋本
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Hitachi Ltd
Edogawa Lumber Industrial Co Ltd
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Hitachi Ltd
Edogawa Lumber Industrial Co Ltd
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  • Buildings Adapted To Withstand Abnormal External Influences (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、ダンパの減衰動作により構造物の振動エネルギを吸収するよう構成された制振装置及びその取付方法に関する。
【0002】
【従来の技術】
従来の制振装置としては、例えば、構造物の梁に固定される上部伝達部材と床側の基礎に固定される下部伝達部材との間に油圧ダンパが取り付けられており、油圧ダンパのシリンダ端部及びピストンロッド端部が水平方向の振動を伝える上部伝達部材又は下部伝達部材に連結されたものがある。また、この制振装置は、住宅の壁内に油圧ダンパを収納させており、油圧ダンパを露出させないように構成されている(特許文献1を参照)。
【0003】
上記のように構成された制振装置においては、構造物に水平方向の振動が入力されると、構造物の横揺れに伴って上部伝達部材と下部伝達部材との間で相対変位が生じる。これにより、油圧ダンパでは、作動油が充填されたシリンダ内をピストンが摺動して作動油の粘性抵抗による減衰力を発生する。そして、構造物の振動は、油圧ダンパの減衰動作により緩衝されて振幅が抑制される。
【0004】
【特許文献1】
特開2002−106204号公報
【0005】
【発明が解決しようとする課題】
上記従来の制振装置では、住宅の壁部の内部に収納する構成であるので、住宅を新築する際に上部伝達部材、下部伝達部材、油圧ダンパを壁内に設置する工事を行った後に壁板材を打ち付けていた。
【0006】
ところで、上記のような新築以外の住宅にも制振装置を取り付けることが検討されている。既に建築されてから数年が経過した既存の住宅においては、構造物外観の見栄えを損なわないで耐震性を向上させるのに、制振装置を室内側から取り付けることが望まれており、しかも、できる限り低コストでその工事を行いたいという要望がある。
【0007】
上記のような従来の制振装置を、室内側から設置する場合には、壁面、天井板及び床板を外し、上梁及び下梁を露出させて設置する必要がある。この場合、特に設置後に天井板及び床板を元に戻すことは難しく、例えば、建築後、十数年が経過した場合には、同じ材料の天井板及び床板が無かったり、見つかったとしても経時変化による変色などが生じている。
【0008】
そのため、制振装置を設置した後に天井板を取り付けると、新しい天井板は他の天井板(数年が経過して変色している)と色が異なっているので、その取付部分だけが新しくなって見栄えが悪くなってしまう。また、全ての天井板を新しいものに交換すると、工事費が高価になってしまい、予算をオーバする等してしまう。
【0009】
また、同様に制振装置を設置する場所の壁板を新しく取り付けると、その壁板部分だけが新しいので、やはり見栄えが悪くなってしまう。この場合、新しい壁板の前にタンスなどの家具を置くことで、新しい壁板及び床板を隠すことができるものの天井板まで隠すことができない。
【0010】
そこで、本発明は上記課題を解決した制振装置及びその取付方法を提供することを目的とする。
【0011】
【課題を解決するための手段】
上記課題を解決するため、本発明は以下のような特徴を有する。
上記請求項1の発明は、構造物の柱間に設けられ、柱の上方の傾動を伝達する上部伝達部材と、構造物の柱間に設けられ、柱の下方の傾動を伝達する下部伝達部材と、上部伝達部材と下部伝達部材との間に設けられ、上部伝達部材と下部伝達部材との相対変位を緩衝するダンパと、構造物の上梁から離間した柱間に横架され、上部伝達部材の上部を柱の上部側面に柱の側面に沿うように延在形成された固定板を介して取り付ける上部取付部材と、構造物の下梁から離間した柱間に横架され、下部伝達部材の下部を柱の下部側面に柱の側面に沿うように延在形成された固定板を介して取り付ける下部取付部材と、を備えたものであり、床板及び天井板を剥がすことなく壁内にダンパを取り付けることが可能になる。
【0012】
上記請求項2の発明は、上部取付部材が天井板より下側に取り付けられ、下部取付部材が床板より上方に取り付けられたことにより、工場などで上部伝達部材、下部伝達部材、ダンパが組み付けられた組立体を容易に取り付けることが可能になり、取付作業に要する時間を短縮する。
【0013】
上記請求項3の発明は、上部取付部材が、上部伝達部材の上端に沿うように柱間に横架される水平支持部と、柱間に横架され、水平支持部に沿って延在し、上部伝達部材の上端に結合される垂直支持部と、水平支持部の両端より柱の側面に沿うように延在され、柱の側面に固定される固定部と、を備えたものであり、上部伝達部材を柱の上部側面に固定することが可能になる。
【0014】
上記請求項4の発明は、下部取付部材が、下部伝達部材の下端に沿うように柱間に横架される水平支持部と、柱間に横架され、水平支持部に沿って延在し、下部伝達部材の下端に結合される垂直支持部と、水平支持部の両端より柱の側面に沿うように延在され、柱の側面に固定される固定部と、を備えたものであり、下部伝達部材を柱の下部側面に固定することが可能になる。
【0015】
上記請求項5の発明は、取付部材が、水平支持部から前記梁側に突出して梁に当接する高さ位置規制部を有するものであり、取付部材を下梁よりも所定距離上方に位置し、上梁よりも所定距離下方に位置するように位置合わせすることが可能になる。
【0016】
上記請求項6の発明は、請求項1記載の制振装置の取付方法であって、柱間の内部空間を塞ぐ内壁面を除去する第1の過程と、柱の側面に沿うように延在形成された固定板を固定する第2の過程と、制振装置を内部空間に挿入し、上部取付部材及び下部取付部材を固定板に固定する第3の過程と、柱間の内部空間を閉塞する壁板を柱に固定する第4の過程と、を実行するものであり、床板及び天井板を剥がすことなく壁内にダンパを取り付けることが可能になる。
【0017】
【発明の実施の形態】
以下、添付図面を参照して本発明の実施の形態を詳細に説明する。
図1は本発明になる制振装置の一実施例の取り付け状態を示す斜視図である。図2は図1に示す制振装置の正面図である。図3は図2中A−A線に沿う縦断面図である。図4は図2中B−B線に沿う横断面図である。尚、図1乃至図4において、外壁及び化粧板を省略してある。
【0018】
図1乃至図4に示されるように、制振装置10は、構造物の基礎12に横架された下梁14の上方に位置する床板16と、2階床を支持するように横架された上梁18より下方に位置する天井板20との間に取り付けられている。また、制振装置10は、構造物としては、例えば、既に建設された木造住宅などに取り付けられる。
【0019】
下梁14と上梁18との間には、複数の柱22が所定間隔毎に起立している。この一対の柱22間とにより形成された壁内が制振装置10を取り付けるための空間となる。床板16は、下梁14の上面に横架された角材24に取り付けられている。天井板20は、上梁18の下面に固定された複数の支柱26に取り付けられている。従って、制振装置10は、床板16と天井板20と一対の柱22との間に形成された空間27内に取り付けられる。
【0020】
制振装置10は、柱22の上方の傾動を伝達する上部伝達部材28と、柱22の下方の傾動を伝達する下部伝達部材30と、上部伝達部材28と下部伝達部材30との間に設けられた油圧ダンパ(緩衝部材)32と、上梁18から離間した高さ位置で柱22間に横架され、上部伝達部材28を柱22の上部側面に取り付ける上部ブラケット(上部取付部材)34と、下梁14から離間した高さ位置で柱22間に横架され、下部伝達部材30を柱22の下部側面に取り付ける下部ブラケット(下部取付部材)36と、柱22の上部側面に固定され上部ブラケット34を支持する上部固定板42と、柱22の下部側面に固定され下部ブラケット36を支持する下部固定板44と、を備えてなる。
【0021】
上部伝達部材28及び下部伝達部材30は、木製合板からなり、設置すべき住宅の空間の大きさ、すなわち柱22間の水平距離(幅寸法La)及び床板16から天井板20までの垂直距離(高さ寸法Lb)に応じた寸法、形状に形成されている。
【0022】
また、油圧ダンパ32は、シリンダ32aと、シリンダ32a内を摺動するピストン(図示せず)と、ピストンに連結されたピストンロッド32bとから構成されており、シリンダ32a内部には作動油が充填されている。
【0023】
そして、油圧ダンパ32のシリンダ32aの端部は、上部伝達部材28の下端に固定されたダンパ用ブラケット38により回動可能に支持されている。また、ピストンロッド32bの端部は、下部伝達部材30の上端に固定されたダンパ用ブラケット40により回動可能に支持されている。ダンパ用ブラケット38及び40は、金属製であり、水平方向の荷重に耐えられるように形成されている。
【0024】
そのため、下梁14に地震による振動が伝播して柱22が傾動し、上部伝達部材28と下部伝達部材30との間で水平方向の相対変位が生じると、油圧ダンパ32では、シリンダ32aに対してピストン及びピストンロッド32bが摺動して抵抗力を発生させる。これにより、下梁14と上梁18との相対変位の加速度が減速され、当該住宅(構造物)の振動が制振される。
【0025】
上部伝達部材28、下部伝達部材30、油圧ダンパ32は、工場において、予め組み立てられた組立体(アッシー)として当該住宅がある現地へ輸送される。
【0026】
上部固定板42及び下部固定板44は、釘やボルトなどの締結部材により柱22の側面に固定される固定部42a,44aと、固定部42a,44aより水平方向に突出する当接部42b,44bとを有する。この上部固定板42及び下部固定板44は、制振装置10の荷重を支えるため、及び油圧ダンパ32の抵抗力を柱22の長手方向に分散作用させて柱22への応力集中を防止するため、固定部42a,44aが柱22の側面に沿って延在形成されており、多数の締結部材により強固に固定される。
【0027】
また、上部固定板42の上端及び下部固定板44の下端には、上部ブラケット34及び下部ブラケット36に当接する当接部42b,44bが水平方向に突出している。そして、下部伝達部材30は、下部ブラケット36の両端を柱22に固定された下部固定板44の当接部44bに載置した後、当接部44bに固定される。
【0028】
ここで、上部ブラケット34及び下部ブラケット36の構成について説明する。尚、上部ブラケット34と下部ブラケット36とは、同一形状であるので、以下、下部ブラケット36について説明する。
【0029】
図5は下部ブラケット36の背面図である。図6は下部ブラケット36の平面図である。図7は下部ブラケット36の正面図である。
【0030】
図5乃至図7に示されるように、下部ブラケット36は、水平方向に延在する取付板46と、取付板46の両端に連結される固定部材48,50とから構成されている。
【0031】
取付板46は、断面形状がL字状に形成されており、固定部材48,50に載置される底板(水平支持部)46aと、底板46aより垂立した垂直板(垂直支持部)46bとを有する。垂直板46bには、固定部材48,50と連結される一対のボルト挿通孔46cと、下部伝達部材30に釘またはボルト等の締結部材を挿通するための小孔46dが多数設けられている。
【0032】
図8は図6中のC部を拡大して示す平面図である。図9は図6中のD部を拡大して示す正面図である。
【0033】
図8及び図9に示されるように、固定部材48,50は、底板46aが載置される底部48a,50aと、柱22の側面に対向するように底部48a,50aより垂直方向に曲げられた側部(固定部)48b,50bと、底部48a,50a及び側部48b,50bより起立するように設けられた垂直部48c,50cとを有する。
【0034】
垂直部48c,50cには、前述した取付板46の両端に連結されるボルト52を挿通するための長孔48d,50dが設けられている。この長孔48d,50dは、柱22の間隔に応じて固定部材48,50の水平方向の位置を調整することができるように水平方向に延在するように形成されている。
【0035】
ここで、上記構成とされた制振装置10の取付方法の手順について説明する。作業手順▲1▼では、まず、制振装置10を既存の構造物の壁面内部に設置する前段階として、柱22間の水平距離(幅寸法La)及び床板16から天井板20までの垂直距離(高さ寸法Lb)を測定する。制振装置10を製作する工場では、この幅寸法La及び高さ寸法Lbに基づいて制振装置10の各部材の寸法を決めて製造し、上部伝達部材28、下部伝達部材30、油圧ダンパ32を組み立てる。
【0036】
作業手順▲2▼では、図10に示されるように、制振装置10を設置する場所の壁面を除去する。そして、上部固定板42を柱22の上部側面に釘またはボルト等の締結部材を用いて固定し、下部固定板44を柱22の下部側面にボルト等の締結部材を用いて固定する。
【0037】
上部固定板42は、当接部42bの高さ位置が天井板20よりも下方に位置するように取り付けられる。下部固定板44は、当接部44bの高さ位置が床板16よりも上方に位置するように取り付けられる。そのため、制振装置10を取り付けるために、天井板20や床板16を剥がす必要がなく、その分設置作業に手間がかからず、短時間での設置が可能になる。
【0038】
作業手順▲3▼では、図11に示されるように、ボルト等の締結部材を用いて上部固定板42に上部ブラケット34を固定し、ボルト等の締結部材を用いて下部固定板44に下部ブラケット36を固定する。この際、上部ブラケット34の取付位置は、上部固定板42の当接部42aによって決まる。また、下部ブラケット36の取付位置は、下部固定板44の当接部44aによって決まる。
【0039】
作業手順▲4▼では、図12に示されるように、制振装置10の下部伝達部材30を下部ブラケット36の取付板46に載置した状態で下部伝達部材30の下部を取付板46にボルト等の締結部材を用いて固定する。この際、下部伝達部材30は、下部ブラケット36の取付位置によって床板16よりも上方に位置するように取り付けられる。
【0040】
続いて、上部伝達部材28の上部を上部ブラケット34にボルト等の締結部材を用いて固定する。この際、上部伝達部材28は、上部ブラケット34の取付位置によって天井板20よりも下方に位置するように取り付けられる。
【0041】
作業手順▲4▼では、上記のように設置された制振装置10を覆うように柱22間に壁パネル(図示せず)を取り付ける。このように、制振装置10を設置した後は、柱22間に壁パネルを取り付けるだけなので、新しい天井板20や床板16を取り付ける必要がなく、その分設置作業に手間がかからず、短時間での設置が可能になると共に、設置コストも安価に抑えられる。
【0042】
しかも、当該住宅が古い場合でも、制振装置10が設置された柱22間の壁パネルのみが新しくなるため、当該壁パネルの前に壁パネルと同じ大きさのタンスや本棚などの家具を置くことにより隠すことができるので、周囲との違和感を無くすことが可能になる。これで、制振装置10の取付作業が終了する。
【0043】
ここで、変形例について図13を参照して説明する。
図13に示されるように、変形例の下部固定板44は、下方に延在する高さ位置規制部52を有する。この高さ位置規制部52は、下梁14に対する下部固定板44の取り付け高さ位置を合わせるものであり、下端が下梁14に当接することにより、下部固定板44の高さ方向の取付位置を規定する。
【0044】
すなわち、下部固定板44は、高さ位置規制部52を下梁14に当接させることにより、当接部44bの高さ位置が床板16よりも上方に位置するように取り付けられる。
【0045】
また、変形例の上部固定板42は、上方に延在する高さ位置規制部52を有する。この高さ位置規制部52は、上梁18に対する上部固定板42の取り付け高さ位置を合わせるものであり、上端が上梁18に当接することにより、上部固定板42の高さ方向の取付位置を規定する。
【0046】
すなわち、上部固定板42は、高さ位置規制部52を上梁18に当接させることにより、当接部42bの高さ位置が天井板20よりも下方に位置するように取り付けられる。
【0047】
これにより、当接部42b,44bに固定される上部ブラケット34及び下部ブラケット36は、高さ方向の取付位置が容易に位置合わせされると共に、上部ブラケット34及び下部ブラケット36が傾斜して取り付けられることを防止できる。そして、上部ブラケット34に固定される上部伝達部材28及び下部ブラケット36に固定される下部伝達部材30は、高さ方向の取付位置を容易に位置合わせされる。
【0048】
尚、上記実施の形態では、天井板20と床板16との間に制振装置10を取り付けた場合を一例として挙げたが、これに限らず、本発明における上梁18から離間した柱22間の取付部分及び下梁14から離間した柱22間の取付部分として、例えば夫々住宅内部の鴨居と敷居を用いても構わない。この場合、地震が発生する可能性が大きい場合に発せられる地震警報発生後にふすまを外して、その代わりに上記制振装置10を鴨居と敷居との間に設置することで、住宅の耐震性を向上させて、地震の発生に備えることができる。
【0049】
また、上記実施の形態では、天井板20と床板16との間に制振装置10を取り付けた場合を一例として挙げたが、これに限らず、住人が所有するタンスや本棚等の家具の高さに合わせて、本発明における上梁から離間した柱間の部分及び下梁から離間した部分に制振装置10を設置するようにしても良い。
【0050】
尚、上記実施の形態では、既存の木造住宅に制振装置10を取り付ける場合を一例として挙げたが、これに限らず、木造以外の住宅、例えば、軽量鉄骨を用いた住宅などにも適用できるのは勿論である。
【0051】
【発明の効果】
以上説明したように、請求項1の発明によれば、構造物の柱間に設けられ、柱の上方の傾動を伝達する上部伝達部材と、構造物の柱間に設けられ、柱の下方の傾動を伝達する下部伝達部材と、上部伝達部材と下部伝達部材との間に設けられ、上部伝達部材と下部伝達部材との相対変位を緩衝するダンパと、構造物の上梁から離間した柱間に横架され、上部伝達部材の上部を柱の上部側面に柱の側面に沿うように延在形成された固定板を介して取り付ける上部取付部材と、構造物の下梁から離間した柱間に横架され、下部伝達部材の下部を柱の下部側面に柱の側面に沿うように延在形成された固定板を介して取り付ける下部取付部材と、を備えたため、床板及び天井板を剥がすことなく壁内にダンパを取り付けることができる。そのため、設置作業を短時間で行えると共に、設置コストも安価に抑えられる。また、設置後に新しい床板及び天井板を取り付ける作業が不要になる。
【0052】
上記請求項2の発明によれば、上部取付部材が天井板より下側に取り付けられ、下部取付部材が床板より上方に取り付けられたことにより、工場などで上部伝達部材、下部伝達部材、ダンパが組み付けられた組立体を容易に取り付けることが可能になり、取付作業に要する時間を短縮する。
【0053】
上記請求項3の発明によれば、上部取付部材が、上部伝達部材の上端に沿うように柱間に横架される水平支持部と、柱間に横架され、水平支持部に沿って延在し、上部伝達部材の上端に結合される垂直支持部と、水平支持部の両端より柱の側面に沿うように延在され、柱の側面に固定される固定部と、を備えたため、上部伝達部材を柱の上部側面に固定することができる。
【0054】
上記請求項4の発明によれば、下部取付部材が、下部伝達部材の下端に沿うように柱間に横架される水平支持部と、柱間に横架され、水平支持部に沿って延在し、下部伝達部材の下端に結合される垂直支持部と、水平支持部の両端より柱の側面に沿うように延在され、柱の側面に固定される固定部と、を備えたため、下部伝達部材を柱の下部側面に固定することができる。
【0055】
上記請求項5の発明によれば、取付部材が、水平支持部から前記梁側に突出して梁に当接する高さ位置規制部を有するものであり、取付部材を下梁よりも所定距離上方に位置し、上梁よりも所定距離下方に位置するように位置合わせすることができる。
【0056】
上記請求項6の発明によれば、請求項1記載の制振装置の取付方法であって、柱間の内部空間を塞ぐ内壁面を除去する第1の過程と、柱の側面に沿うように延在形成された固定板を固定する第2の過程と、制振装置を内部空間に挿入し、上部取付部材及び下部取付部材を固定板に固定する第3の過程と、柱間の内部空間を閉塞する壁板を柱に固定する第4の過程と、を実行するため、床板及び天井板を剥がすことなく壁内にダンパを取り付けることができる。そのため、設置作業を短時間で行えると共に、設置コストも安価に抑えられる。また、設置後に新しい床板及び天井板を取り付ける作業が不要になる。
【図面の簡単な説明】
【図1】本発明になる制振装置の一実施例の取り付け状態を示す斜視図である。
【図2】図1に示す制振装置の正面図である。
【図3】図2中A−A線に沿う縦断面図である。
【図4】図2中B−B線に沿う横断面図である。
【図5】下部ブラケット36の背面図である。
【図6】下部ブラケット36の平面図である。
【図7】下部ブラケット36の正面図である。
【図8】図6中のC部を拡大して示す平面図である。
【図9】図6中のD部を拡大して示す正面図である。
【図10】作業手順▲2▼を説明するための工程図である。
【図11】作業手順▲3▼を説明するための工程図である。
【図12】作業手順▲4▼を説明するための工程図である。
【図13】変形例を説明するための図である。
【符号の説明】
10 制振装置
12 基礎
14 下梁
16 床板
18 上梁
20 天井板
22 柱
27 空間
28 上部伝達部材
30 下部伝達部材
32 油圧ダンパ
34 上部ブラケット
36 下部ブラケット
38,40 ダンパ用ブラケット
42 上部固定板
44 下部固定板
46 取付板
48,50 固定部材
52 高さ位置規制部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration damping device configured to absorb vibration energy of a structure by a damping operation of a damper, and a mounting method thereof.
[0002]
[Prior art]
As a conventional vibration damping device, for example, a hydraulic damper is attached between an upper transmission member fixed to a beam of a structure and a lower transmission member fixed to a foundation on the floor side. There is one in which the part and the end of the piston rod are connected to an upper transmission member or a lower transmission member for transmitting horizontal vibration. In addition, this vibration damping device is configured such that a hydraulic damper is housed in a wall of a house and the hydraulic damper is not exposed (see Patent Document 1).
[0003]
In the vibration damping device configured as described above, when horizontal vibration is input to the structure, relative displacement occurs between the upper transmission member and the lower transmission member as the structure rolls. As a result, in the hydraulic damper, the piston slides in the cylinder filled with the hydraulic oil and generates a damping force due to the viscous resistance of the hydraulic oil. The vibration of the structure is buffered by the damping operation of the hydraulic damper and the amplitude is suppressed.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-106204
[Problems to be solved by the invention]
Since the conventional vibration damping device is configured to be housed inside the wall portion of the house, the wall after the construction for installing the upper transmission member, the lower transmission member, and the hydraulic damper in the wall is performed when newly constructing a house. I was hitting the board.
[0006]
By the way, it is considered to attach a vibration control device to a house other than the above-mentioned new construction. In existing houses that have already been built for several years, it is desirable to install a vibration damping device from the indoor side to improve the earthquake resistance without impairing the appearance of the structure, There is a desire to perform the construction at the lowest possible cost.
[0007]
When the conventional vibration damping device as described above is installed from the indoor side, it is necessary to remove the wall surface, the ceiling plate, and the floor plate and to expose the upper beam and the lower beam. In this case, it is difficult to return the ceiling board and floor board to their original state after installation.For example, when ten years have passed since construction, there is no ceiling board and floor board made of the same material. Discoloration due to has occurred.
[0008]
Therefore, when the ceiling plate is installed after installing the vibration control device, the new ceiling plate is different in color from other ceiling plates (discolored after several years), so only the installation part is new. Will look bad. In addition, if all the ceiling boards are replaced with new ones, the construction cost becomes expensive and the budget is exceeded.
[0009]
Similarly, when a new wall plate is installed at the place where the vibration control device is installed, only the wall plate portion is new, so that the appearance is also deteriorated. In this case, by placing furniture such as chests in front of the new wallboard, the new wallboard and floorboard can be hidden, but the ceiling board cannot be hidden.
[0010]
Therefore, an object of the present invention is to provide a vibration damping device and a mounting method thereof that solve the above-described problems.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has the following features.
The invention according to claim 1 is provided between the columns of the structure and transmits an upper tilt of the column, and a lower transmission member provided between the columns of the structure and transmits the lower tilt of the column. Between the upper transmission member and the lower transmission member, the damper that cushions the relative displacement between the upper transmission member and the lower transmission member, and the column that is horizontally mounted between the pillars spaced from the upper beam of the structure. an upper attachment member for attaching the upper member via a fixing plate formed to extend along the side surface of the column at the top side of the column, is laterally placed between posts spaced from the lower beam of the structure, the lower transmitting member And a lower mounting member that is attached to a lower side surface of the column via a fixing plate extending along the side surface of the column , and a damper is provided in the wall without peeling off the floor plate and the ceiling plate. It becomes possible to attach.
[0012]
According to the second aspect of the invention, the upper transmission member, the lower transmission member, and the damper are assembled at a factory or the like by attaching the upper mounting member below the ceiling plate and the lower mounting member above the floor plate. Thus, it is possible to easily attach the assembly, and the time required for the attachment work is shortened.
[0013]
In the invention of claim 3, the upper mounting member is horizontally supported between the columns so as to be along the upper end of the upper transmission member, and is horizontally extended between the columns and extends along the horizontal support portion. A vertical support portion coupled to the upper end of the upper transmission member, and a fixing portion that extends from both ends of the horizontal support portion along the side surface of the column and is fixed to the side surface of the column. It becomes possible to fix the upper transmission member to the upper side surface of the column.
[0014]
In the invention of claim 4, the lower mounting member is horizontally supported between the columns so as to extend along the lower end of the lower transmission member, and is horizontally mounted between the columns and extends along the horizontal supporting portion. A vertical support portion coupled to the lower end of the lower transmission member, and a fixing portion that extends from both ends of the horizontal support portion along the side surface of the column and is fixed to the side surface of the column. It becomes possible to fix the lower transmission member to the lower side surface of the column.
[0015]
In the invention of claim 5, the attachment member has a height position restricting portion that protrudes from the horizontal support portion toward the beam and contacts the beam, and the attachment member is positioned above the lower beam by a predetermined distance. Thus, it is possible to align so as to be positioned a predetermined distance below the upper beam.
[0016]
Invention described in claim 6 is the method of mounting the vibration damping device according to claim 1, wherein a first process of removing the inner wall for closing the interior space between the pillars, extending along the side surface of the pillar The second process of fixing the formed fixing plate, the third process of inserting the damping device into the internal space, fixing the upper mounting member and the lower mounting member to the fixing plate, and closing the internal space between the columns The fourth process of fixing the wall plate to the pillar is performed, and the damper can be attached in the wall without peeling off the floor plate and the ceiling plate.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a perspective view showing a mounting state of an embodiment of a vibration damping device according to the present invention. FIG. 2 is a front view of the vibration damping device shown in FIG. FIG. 3 is a longitudinal sectional view taken along line AA in FIG. 4 is a cross-sectional view taken along line BB in FIG. In FIGS. 1 to 4, the outer wall and the decorative plate are omitted.
[0018]
As shown in FIGS. 1 to 4, the vibration damping device 10 is horizontally mounted so as to support the floor plate 16 positioned above the lower beam 14 horizontally mounted on the foundation 12 of the structure and the second floor. It is attached between the ceiling plate 20 located below the upper beam 18. Moreover, the damping device 10 is attached to a wooden house already constructed as a structure, for example.
[0019]
A plurality of columns 22 stands between the lower beam 14 and the upper beam 18 at predetermined intervals. The inside of the wall formed by the space between the pair of pillars 22 becomes a space for mounting the vibration damping device 10. The floor board 16 is attached to a square member 24 laid horizontally on the upper surface of the lower beam 14. The ceiling plate 20 is attached to a plurality of columns 26 fixed to the lower surface of the upper beam 18. Therefore, the vibration damping device 10 is attached in a space 27 formed between the floor plate 16, the ceiling plate 20, and the pair of pillars 22.
[0020]
The vibration damping device 10 is provided between the upper transmission member 28 that transmits the upward tilt of the column 22, the lower transmission member 30 that transmits the downward tilt of the column 22, and the upper transmission member 28 and the lower transmission member 30. A hydraulic damper (buffer member) 32 and an upper bracket (upper mounting member) 34 that is mounted between the columns 22 at a height spaced from the upper beam 18 and that attaches the upper transmission member 28 to the upper side surface of the column 22. A lower bracket (lower mounting member) 36 that is horizontally mounted between the columns 22 at a height away from the lower beam 14 and that attaches the lower transmission member 30 to the lower side surface of the column 22, and an upper portion that is fixed to the upper side surface of the column 22 An upper fixing plate 42 that supports the bracket 34 and a lower fixing plate 44 that is fixed to the lower side surface of the column 22 and supports the lower bracket 36 are provided.
[0021]
The upper transmission member 28 and the lower transmission member 30 are made of wooden plywood, and the size of the space of the house to be installed, that is, the horizontal distance between the pillars 22 (width dimension La) and the vertical distance from the floor board 16 to the ceiling board 20 ( It is formed in a size and shape corresponding to the height dimension Lb).
[0022]
The hydraulic damper 32 includes a cylinder 32a, a piston (not shown) that slides in the cylinder 32a, and a piston rod 32b connected to the piston, and the hydraulic oil is filled in the cylinder 32a. Has been.
[0023]
The end of the cylinder 32 a of the hydraulic damper 32 is rotatably supported by a damper bracket 38 fixed to the lower end of the upper transmission member 28. Further, the end of the piston rod 32b is rotatably supported by a damper bracket 40 fixed to the upper end of the lower transmission member 30. The damper brackets 38 and 40 are made of metal and formed to withstand a load in the horizontal direction.
[0024]
Therefore, when vibration due to an earthquake propagates to the lower beam 14 and the column 22 tilts and a horizontal relative displacement occurs between the upper transmission member 28 and the lower transmission member 30, the hydraulic damper 32 causes the cylinder 32 a to move relative to the cylinder 32 a. The piston and the piston rod 32b slide to generate a resistance force. Thereby, the acceleration of the relative displacement of the lower beam 14 and the upper beam 18 is decelerated, and the vibration of the house (structure) is damped.
[0025]
The upper transmission member 28, the lower transmission member 30, and the hydraulic damper 32 are transported to the site where the house is located as a preassembled assembly (assembly) in a factory.
[0026]
The upper fixing plate 42 and the lower fixing plate 44 include fixing portions 42a and 44a that are fixed to the side surface of the column 22 by fastening members such as nails and bolts, and contact portions 42b that protrude in the horizontal direction from the fixing portions 42a and 44a, 44b. The upper fixing plate 42 and the lower fixing plate 44 support the load of the vibration damping device 10, and prevent the stress concentration on the column 22 by dispersing the resistance force of the hydraulic damper 32 in the longitudinal direction of the column 22. The fixing portions 42a and 44a are formed so as to extend along the side surfaces of the pillars 22 and are firmly fixed by a number of fastening members.
[0027]
Further, at the upper end of the upper fixing plate 42 and the lower end of the lower fixing plate 44, contact portions 42b and 44b that contact the upper bracket 34 and the lower bracket 36 protrude in the horizontal direction. The lower transmission member 30 is fixed to the abutting portion 44 b after placing both ends of the lower bracket 36 on the abutting portion 44 b of the lower fixing plate 44 fixed to the column 22.
[0028]
Here, the configuration of the upper bracket 34 and the lower bracket 36 will be described. Since the upper bracket 34 and the lower bracket 36 have the same shape, the lower bracket 36 will be described below.
[0029]
FIG. 5 is a rear view of the lower bracket 36. FIG. 6 is a plan view of the lower bracket 36. FIG. 7 is a front view of the lower bracket 36.
[0030]
As shown in FIGS. 5 to 7, the lower bracket 36 includes a mounting plate 46 extending in the horizontal direction and fixing members 48 and 50 connected to both ends of the mounting plate 46.
[0031]
The mounting plate 46 has an L-shaped cross section, and includes a bottom plate (horizontal support portion) 46a placed on the fixing members 48 and 50, and a vertical plate (vertical support portion) 46b suspended from the bottom plate 46a. And have. The vertical plate 46b is provided with a pair of bolt insertion holes 46c connected to the fixing members 48 and 50, and a plurality of small holes 46d for inserting fastening members such as nails or bolts into the lower transmission member 30.
[0032]
FIG. 8 is an enlarged plan view showing a portion C in FIG. FIG. 9 is an enlarged front view showing a portion D in FIG.
[0033]
As shown in FIGS. 8 and 9, the fixing members 48 and 50 are bent in the vertical direction from the bottom portions 48a and 50a so as to face the bottom portions 48a and 50a on which the bottom plate 46a is placed and the side surfaces of the pillars 22. Side portions (fixed portions) 48b, 50b and vertical portions 48c, 50c provided so as to stand up from the bottom portions 48a, 50a and the side portions 48b, 50b.
[0034]
The vertical portions 48c and 50c are provided with long holes 48d and 50d for inserting the bolts 52 connected to both ends of the mounting plate 46 described above. The long holes 48d and 50d are formed to extend in the horizontal direction so that the positions of the fixing members 48 and 50 in the horizontal direction can be adjusted according to the interval between the pillars 22.
[0035]
Here, the procedure of the mounting method of the vibration damping device 10 having the above-described configuration will be described. In the work procedure {circle around (1)}, first, the horizontal distance between the pillars 22 (width dimension La) and the vertical distance from the floor board 16 to the ceiling board 20 are set as a stage before the vibration damping device 10 is installed inside the wall surface of the existing structure. (Height dimension Lb) is measured. In a factory that manufactures the vibration damping device 10, the dimensions of each member of the vibration damping device 10 are determined based on the width dimension La and the height dimension Lb, and the upper transmission member 28, the lower transmission member 30, and the hydraulic damper 32 are manufactured. Assemble.
[0036]
In work procedure {circle around (2)}, as shown in FIG. 10, the wall surface where the vibration damping device 10 is installed is removed. Then, the upper fixing plate 42 is fixed to the upper side surface of the column 22 using a fastening member such as a nail or a bolt, and the lower fixing plate 44 is fixed to the lower side surface of the column 22 using a fastening member such as a bolt.
[0037]
The upper fixing plate 42 is attached so that the height position of the abutting portion 42 b is located below the ceiling plate 20. The lower fixing plate 44 is attached so that the height position of the contact portion 44b is positioned above the floor plate 16. Therefore, it is not necessary to peel off the ceiling board 20 or the floor board 16 in order to attach the vibration damping device 10, so that the installation work does not take time and installation can be performed in a short time.
[0038]
In the work procedure (3), as shown in FIG. 11, the upper bracket 34 is fixed to the upper fixing plate 42 using a fastening member such as a bolt and the lower bracket 44 is fixed to the lower fixing plate 44 using a fastening member such as a bolt. 36 is fixed. At this time, the mounting position of the upper bracket 34 is determined by the contact portion 42 a of the upper fixing plate 42. The mounting position of the lower bracket 36 is determined by the contact portion 44 a of the lower fixing plate 44.
[0039]
In the work procedure {circle over (4)}, as shown in FIG. 12, the lower transmission member 30 of the vibration damping device 10 is placed on the attachment plate 46 of the lower bracket 36 and the lower part of the lower transmission member 30 is bolted to the attachment plate 46. It fixes using fastening members, such as. Under the present circumstances, the lower transmission member 30 is attached so that it may be located above the floor board 16 with the attachment position of the lower bracket 36. FIG.
[0040]
Subsequently, the upper portion of the upper transmission member 28 is fixed to the upper bracket 34 using a fastening member such as a bolt. At this time, the upper transmission member 28 is attached so as to be positioned below the ceiling board 20 depending on the attachment position of the upper bracket 34.
[0041]
In the work procedure (4), a wall panel (not shown) is attached between the pillars 22 so as to cover the vibration damping device 10 installed as described above. Thus, after installing the vibration damping device 10, only the wall panel is attached between the pillars 22, so there is no need to install a new ceiling board 20 or floor board 16, and the installation work is not time-consuming and the work is short. Installation in time is possible, and installation costs can be kept low.
[0042]
Moreover, even when the house is old, only the wall panel between the pillars 22 on which the vibration damping device 10 is installed is renewed, so that furniture such as a chiffon or bookshelf of the same size as the wall panel is placed in front of the wall panel. This makes it possible to eliminate the sense of incongruity with the surroundings. This completes the mounting operation of the vibration damping device 10.
[0043]
Here, a modified example will be described with reference to FIG.
As shown in FIG. 13, the modified lower fixing plate 44 has a height position restricting portion 52 that extends downward. The height position restricting portion 52 matches the mounting height position of the lower fixing plate 44 with respect to the lower beam 14, and the lower end abuts against the lower beam 14 so that the lower fixing plate 44 is mounted in the height direction. Is specified.
[0044]
That is, the lower fixing plate 44 is attached so that the height position of the abutting portion 44 b is located above the floor plate 16 by bringing the height position restricting portion 52 into contact with the lower beam 14.
[0045]
Further, the upper fixing plate 42 of the modified example has a height position restricting portion 52 extending upward. The height position restricting portion 52 matches the mounting height position of the upper fixing plate 42 with respect to the upper beam 18, and the upper position of the upper fixing plate 42 is in contact with the upper beam 18 so that the upper fixing plate 42 is attached in the height direction. Is specified.
[0046]
That is, the upper fixing plate 42 is attached so that the height position of the contact portion 42 b is positioned below the ceiling plate 20 by bringing the height position restricting portion 52 into contact with the upper beam 18.
[0047]
Thereby, the upper bracket 34 and the lower bracket 36 fixed to the contact portions 42b and 44b are easily aligned in the height direction, and the upper bracket 34 and the lower bracket 36 are attached to be inclined. Can be prevented. The upper transmission member 28 fixed to the upper bracket 34 and the lower transmission member 30 fixed to the lower bracket 36 can be easily aligned in the mounting position in the height direction.
[0048]
In addition, in the said embodiment, although the case where the damping device 10 was attached between the ceiling board 20 and the floor board 16 was mentioned as an example, it is not restricted to this, Between the pillars 22 spaced apart from the upper beam 18 in this invention For example, a duck and a sill inside the house may be used as the attachment part between the pillars 22 spaced from the lower beam 14 and the attachment part, respectively. In this case, by removing the bran after the occurrence of an earthquake warning when an earthquake is likely to occur, the vibration control device 10 is installed between the duck and the sill instead. It can be improved to prepare for the occurrence of an earthquake.
[0049]
Moreover, in the said embodiment, although the case where the damping device 10 was attached between the ceiling board 20 and the floor board 16 was mentioned as an example, it is not restricted to this, The height of furniture, such as a chiffon and a bookshelf which a resident owns In accordance with this, the vibration damping device 10 may be installed in a portion between columns separated from the upper beam and a portion separated from the lower beam in the present invention.
[0050]
In the above embodiment, the case where the vibration damping device 10 is attached to an existing wooden house has been described as an example. However, the present invention is not limited thereto, and can be applied to a house other than a wooden house, for example, a house using a lightweight steel frame. Of course.
[0051]
【The invention's effect】
As described above, according to the first aspect of the present invention, the upper transmission member that is provided between the columns of the structure and transmits the tilting of the upper side of the column and the column that is provided between the columns of the structure. Between the lower transmission member that transmits the tilt, the damper that is provided between the upper transmission member and the lower transmission member, and cushions the relative displacement between the upper transmission member and the lower transmission member, and the column that is separated from the upper beam of the structure to the cross bar, and an upper attachment member for attaching the upper portion of the upper transmission member via a fixing plate formed to extend along the side surface of the column at the top side of the column, between posts spaced from the lower beam of the structure It is laterally placed, because of and a lower mounting member for mounting through a fixing plate formed to extend along the side surfaces of the pillar at the bottom of the lower transmitting member to the lower side of the column, without peeling off the floor and ceiling plate A damper can be installed in the wall. Therefore, the installation work can be performed in a short time, and the installation cost can be suppressed at a low cost. Moreover, the work which attaches a new floor board and a ceiling board after installation becomes unnecessary.
[0052]
According to the second aspect of the present invention, the upper transmission member, the lower transmission member, and the damper are installed at a factory or the like by attaching the upper mounting member to the lower side of the ceiling plate and the lower mounting member to the upper side of the floor plate. The assembled assembly can be easily attached, and the time required for the attachment work is shortened.
[0053]
According to the invention of claim 3, the upper mounting member is horizontally supported between the columns so as to be along the upper end of the upper transmission member, and is horizontally mounted between the columns and extends along the horizontal support portion. A vertical support portion coupled to the upper end of the upper transmission member, and a fixing portion that extends from both ends of the horizontal support portion along the side surface of the column and is fixed to the side surface of the column. The transmission member can be fixed to the upper side surface of the column.
[0054]
According to the fourth aspect of the present invention, the lower mounting member is horizontally supported between the columns along the lower end of the lower transmission member, and is horizontally mounted between the columns and extends along the horizontal support. And a vertical support portion coupled to the lower end of the lower transmission member, and a fixing portion that extends from both ends of the horizontal support portion along the side surface of the column and is fixed to the side surface of the column. The transmission member can be fixed to the lower side surface of the column.
[0055]
According to the fifth aspect of the present invention, the attachment member has a height position restricting portion that protrudes from the horizontal support portion toward the beam and abuts against the beam, and the attachment member is located a predetermined distance above the lower beam. It can be positioned so that it is positioned a predetermined distance below the upper beam.
[0056]
According to the invention described in claim 6, a mounting method of the vibration damping device according to claim 1, the first step of removing the inner wall for closing the interior space between the pillars, so as to extend along the side surfaces of the pillar A second step of fixing the fixed plate formed to extend, a third step of inserting the vibration damping device into the internal space and fixing the upper mounting member and the lower mounting member to the fixing plate, and the internal space between the columns In order to execute the fourth process of fixing the wall plate that closes the wall to the pillar, the damper can be attached in the wall without peeling off the floor plate and the ceiling plate. Therefore, the installation work can be performed in a short time, and the installation cost can be suppressed at a low cost. Moreover, the work which attaches a new floor board and a ceiling board after installation becomes unnecessary.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a mounting state of an embodiment of a vibration damping device according to the present invention.
FIG. 2 is a front view of the vibration damping device shown in FIG.
FIG. 3 is a longitudinal sectional view taken along the line AA in FIG.
4 is a transverse sectional view taken along the line BB in FIG. 2. FIG.
5 is a rear view of the lower bracket 36. FIG.
6 is a plan view of the lower bracket 36. FIG.
7 is a front view of the lower bracket 36. FIG.
FIG. 8 is an enlarged plan view showing a portion C in FIG.
FIG. 9 is an enlarged front view showing a D part in FIG. 6;
FIG. 10 is a process diagram for explaining a work procedure (2).
FIG. 11 is a process diagram for explaining a work procedure (3).
FIG. 12 is a process diagram for explaining a work procedure (4).
FIG. 13 is a diagram for explaining a modification.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Damping device 12 Base 14 Lower beam 16 Floor plate 18 Upper beam 20 Ceiling plate 22 Column 27 Space 28 Upper transmission member 30 Lower transmission member 32 Hydraulic damper 34 Upper bracket 36 Lower bracket 38, 40 Damper bracket 42 Upper fixing plate 44 Lower Fixed plate 46 Mounting plates 48, 50 Fixed member 52 Height position restricting portion

Claims (6)

構造物の柱間に設けられ、前記柱の上方の傾動を伝達する上部伝達部材と、
前記構造物の柱間に設けられ、前記柱の下方の傾動を伝達する下部伝達部材と、
前記上部伝達部材と前記下部伝達部材との間に設けられ、前記上部伝達部材と前記下部伝達部材との相対変位を緩衝するダンパと、
前記構造物の上梁から離間した柱間に横架され、前記上部伝達部材の上部を前記柱の上部側面に前記柱の側面に沿うように延在形成された固定板を介して取り付ける上部取付部材と、
前記構造物の下梁から離間した柱間に横架され、前記下部伝達部材の下部を前記柱の下部側面に前記柱の側面に沿うように延在形成された固定板を介して取り付ける下部取付部材と、
を備えたことを特徴とする制振装置。
An upper transmission member that is provided between the columns of the structure and transmits an upward tilt of the column;
A lower transmission member that is provided between the pillars of the structure and transmits a downward tilt of the pillar;
A damper that is provided between the upper transmission member and the lower transmission member and cushions relative displacement between the upper transmission member and the lower transmission member;
An upper mounting that is horizontally mounted between columns spaced apart from the upper beam of the structure, and that attaches the upper part of the upper transmission member to the upper side surface of the column through a fixing plate extending along the side surface of the column Members,
A lower mounting that is horizontally mounted between columns separated from the lower beam of the structure, and that attaches the lower portion of the lower transmission member to the lower side surface of the column via a fixing plate extending along the side surface of the column Members,
A vibration damping device characterized by comprising:
前記上部取付部材は、天井板より下側に取り付けられ、
前記下部取付部材は、床板より上方に取り付けられたことを特徴とする請求項1記載の制振装置。
The upper mounting member is mounted below the ceiling plate,
2. The vibration damping device according to claim 1, wherein the lower mounting member is mounted above the floor board .
前記上部取付部材は、
前記上部伝達部材の上端に沿うように前記柱間に横架される水平支持部と、
前記柱間に横架され、前記水平支持部に沿って延在し、前記上部伝達部材の上端に結合される垂直支持部と、
前記水平支持部の両端より前記柱の側面に沿うように延在され、前記柱の側面に固定される固定部と、
を備えたことを特徴とする請求項1記載の制振装置。
The upper mounting member is
A horizontal support portion laid across the pillars along the upper end of the upper transmission member;
A vertical support that is horizontally mounted between the columns, extends along the horizontal support, and is coupled to an upper end of the upper transmission member;
A fixed portion that extends from both ends of the horizontal support portion along the side surface of the column and is fixed to the side surface of the column;
The vibration damping device according to claim 1, further comprising:
前記下部取付部材は、
前記下部伝達部材の下端に沿うように前記柱間に横架される水平支持部と、
前記柱間に横架され、前記水平支持部に沿って延在し、前記下部伝達部材の下端に結合される垂直支持部と、
前記水平支持部の両端より前記柱の側面に沿うように延在され、前記柱の側面に固定される固定部と、
を備えたことを特徴とする請求項1記載の制振装置。
The lower mounting member is
A horizontal support portion laid across the pillars along the lower end of the lower transmission member;
A vertical support that is horizontally mounted between the columns, extends along the horizontal support, and is coupled to a lower end of the lower transmission member;
A fixed portion that extends from both ends of the horizontal support portion along the side surface of the column and is fixed to the side surface of the column;
The vibration damping device according to claim 1, further comprising:
前記取付部材は、前記水平支持部から前記梁側に突出して前記梁に当接する高さ位置規制部を有することを特徴とする請求項3または4記載の制振装置。  5. The vibration damping device according to claim 3, wherein the attachment member includes a height position restricting portion that protrudes from the horizontal support portion toward the beam and contacts the beam. 前記請求項1記載の制振装置の取付方法であって
前記柱間の内部空間を塞ぐ内壁面を除去する第1の過程と、
前記柱の側面に沿うように延在形成された前記固定板を固定する第2の過程と、
前記制振装置を前記内部空間に挿入し、前記上部取付部材及び前記下部取付部材を前記固定板に固定する第3の過程と、
前記柱間の内部空間を閉塞する壁板を前記柱に固定する第4の過程と、
を実行することを特徴とする制振装置の取付方法。
A mounting method of the vibration damping apparatus of claim 1,
A first step of removing an inner wall surface blocking the internal space between the columns;
A second step of fixing the fixing plate formed to extend along a side surface of the pillar,
A third step of inserting the vibration damping device into the internal space and fixing the upper mounting member and the lower mounting member to the fixing plate;
A fourth process of fixing to the pillar a wall plate that closes an internal space between the pillars;
A method of mounting a vibration damping device, comprising:
JP2003004791A 2003-01-10 2003-01-10 Damping device and mounting method thereof Expired - Fee Related JP4041743B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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JP4878144B2 (en) * 2005-03-23 2012-02-15 ミサワホーム株式会社 Damping wall connection structure
JP5153440B2 (en) * 2008-04-28 2013-02-27 日立オートモティブシステムズ株式会社 Vibration control device
JP2013130009A (en) * 2011-12-21 2013-07-04 Okabe Co Ltd Deformation energy absorption unit of wooden building and frame structure of wooden building
KR102222979B1 (en) 2016-10-18 2021-03-04 히다치 아스테모 가부시키가이샤 Vibration suppression device
JP6892237B2 (en) * 2016-10-18 2021-06-23 日立Astemo株式会社 Seismic control device
JP7516708B2 (en) * 2019-12-19 2024-07-17 株式会社竹中工務店 Reinforcement structure for wooden buildings
JP7512559B2 (en) * 2019-12-19 2024-07-09 株式会社竹中工務店 Reinforcement structure for wooden buildings

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