JP6463137B2 - Seismic reduction device - Google Patents

Seismic reduction device Download PDF

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JP6463137B2
JP6463137B2 JP2015001996A JP2015001996A JP6463137B2 JP 6463137 B2 JP6463137 B2 JP 6463137B2 JP 2015001996 A JP2015001996 A JP 2015001996A JP 2015001996 A JP2015001996 A JP 2015001996A JP 6463137 B2 JP6463137 B2 JP 6463137B2
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elastic member
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receiving piece
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JP2016125636A (en
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信義 村井
信義 村井
豊 青山
豊 青山
きよ衣 水谷
きよ衣 水谷
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Tokkyokiki Corp
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Description

本発明は、巨大地震に見舞われ、防振架台或いは枠フレームで構成された固定台など支持架台に、載置された負荷に対する支持架台の許容範囲を超える揺れが生じたとしても、載置された負荷の転倒を効果的且つ未然に防止できる後付けの減震装置に関する。   The present invention suffers from a huge earthquake and is placed on a support stand such as an anti-vibration stand or a frame made of a frame frame, even if a swing exceeding the allowable range of the support stand for the placed load occurs. The present invention relates to a retrofit seismic reduction device that can effectively prevent the falling of a load.

従来からビルの電源装置や工場に設置された機械設備は、枠フレームで構成された固定台に直接載置されたり、これら設備から発生する振動、或いはこれら装置に設置面から伝達する振動を遮断するために防振架台に載置されるという事が広く行われている。   Conventionally, power supply devices in buildings and machinery and equipment installed in factories are placed directly on a fixed base composed of a frame frame, and vibrations generated from these facilities, or vibrations transmitted from the installation surface to these devices are cut off. In order to do this, it is widely used to be placed on a vibration isolation stand.

防振架台を利用する場合、床に設置される下部架台と、負荷である装置を載置する上部架台と、両者の間に複数力所設置され、上部架台を支えるコイルばねを主構成要素とする防振具と、上部架台と下部架台の間で水平方向及び垂直方向に相対移動が生じた場合にこれを一定範囲に抑制するストッパ機構とで構成されている。これにより装置から発生した通常の振動、或いは前述のように地震などによる逆方向からの振動（床側からの振動）に対しては、コイルばねの働きにより上部架台と下部架台との間の振動の伝達を効果的に遮断或いは抑制することができる。   When using an anti-vibration frame, the lower frame installed on the floor, the upper frame on which the load device is placed, and coil springs that are installed at multiple power stations between the two to support the upper frame are the main components. And a stopper mechanism that suppresses a relative movement in the horizontal direction and the vertical direction between the upper frame and the lower frame. As a result, for normal vibrations generated from the device, or vibrations from the reverse direction due to earthquakes as described above (vibrations from the floor side), the vibration between the upper frame and the lower frame due to the action of the coil spring. Can be effectively blocked or suppressed.

そして、仮に、前述のように逆方向の揺れとして、台風のような風の圧力や小規模の地震による揺れに見舞われ、通常の振幅を超えるような揺れを受けたとしても、ストッパ部材とその可動範囲を規制する耐震枠とで構成されたストッパ機構によって上部架台間と下部架台間の水平方向或いは垂直方向の相対移動が一定範囲で規制されて上部架台が許容値を越えて大きく揺れて傾いたり、甚だしくは装置もろとも上部架台が倒れるということがないように規制している。   And, as mentioned above, even if it is affected by wind pressure like a typhoon or a shake by a small-scale earthquake as a shake in the reverse direction, even if it receives a shake exceeding the normal amplitude, the stopper member and its The horizontal or vertical relative movement between the upper frame and the lower frame is restricted within a certain range by the stopper mechanism composed of the seismic frame that regulates the movable range, and the upper frame is greatly swung over the allowable value and tilted. In other words, the device is regulated so that the upper frame will not fall down with the device.

ところが、ストッパ部材の強度を遥かに超えるような巨大地震に襲われ、その巨大な衝撃荷重によりストッパ部材が破損し、特高トランスや非常用発電機などの大型設備機器が防振架台から転落して本来の機能を喪失するという事態が発生した（特許文献１）。なお、防振架台を使用せず、アンカーで床面に設置された固定台の上に重量設備を直接、設置する場合もあるが、この場合でも揺れによって重量設備が激しいローリングによって傾き、アンカーが破断したり引き抜かれたりして倒壊するということもあった。   However, it was hit by a huge earthquake that far exceeded the strength of the stopper member, the stopper member was damaged by the huge impact load, and large equipment such as extra high transformers and emergency generators fell from the anti-vibration stand. As a result, the original function was lost (Patent Document 1). In some cases, the weight equipment is installed directly on the fixed base installed on the floor with the anchor without using the anti-vibration mount. Sometimes it broke down or pulled out.

特開２０１４−１６３５０５号公報JP 2014-163505 A

このような事故の原因は、防振架台のストッパ部材の強度不足が原因であるが、ストッパ部材は防振架台に組み込まれているため、強度を補強するためには架台ごと取り換える必要があり大規模な工事が必要となる。このような大規模な工事では、多大なコストと工事期間中に地震に見舞われるというようなリスクがあり、現時点では既に組み込まれている防振架台をそのまま利用し、後付けでストッパ部材の強度不足を解消することが望まれている。また、防振架台を使用せず、重量設備を直接、固定台の上に設置する場合もアンカーの補強などは不可能であり、後付けの補強が望まれている。   The cause of such an accident is due to insufficient strength of the stopper member of the anti-vibration base, but since the stopper member is built into the anti-vibration base, it is necessary to replace the base to reinforce the strength. Large scale construction is required. In such large-scale construction, there is a large cost and risk of being hit by an earthquake during the construction period. At present, the built-in vibration isolator is used as it is, and the strength of the stopper member is insufficient after retrofitting. It is hoped that this will be resolved. In addition, even when the heavy equipment is installed directly on the fixed base without using the vibration isolating base, it is impossible to reinforce the anchor or the like, and retrofitting is desired.

本発明はこのような問題点に鑑みてなされたもので、後付けで効果的な補強用の減震装置を提供することを目的とする。   The present invention has been made in view of such problems, and an object thereof is to provide an effective vibration-reducing device that is retrofitted.

請求項１に記載の減震装置Ｂは、
厚手の板金をＬ形に折り曲げて形成され、負荷Ｗ支持用の支持架台Ａの側方に固定される固定辺１０ｂおよび支持架台Ａの側面に面接するように設けられた架台受け片１０ａを有する支持部材１０と、
前記架台受け片１０ａに固定され、支持架台Ａの側面に接して又は隙間Ｓを設けて設置された弾性部材１２と、
前記架台受け片１０ａは、弾性部材１２に揺れが加わり、弾性部材１２の変形だけでは不足の時、固定片１０ｂに対する屈曲部分において復帰可能にて弾性部材１２と共に抵抗を持って背方に移動可能に構成され、
支持架台Ａの反対側である、架台受け片１０ａの背面側に配置され、揺れを発生した支持架台Ａの側面に弾性部材１２が押圧され、弾性部材１２と共に背方に移動した架台受け片１０ａに押圧され、抵抗を持って背方に移動するダンパー部材２０とで構成されていることを特徴とする。 The vibration damping device B according to claim 1 is:
It is formed by bending a thick metal plate in an L shape, with the load W cradle receiving piece 10a provided so as to interview the side surface of the fixed Ru fixed sides 10b and cradle support A on the side of the support cradle A for supporting A support member 10;
An elastic member 12 fixed to the gantry receiving piece 10a and installed in contact with the side surface of the support gantry A or with a gap S;
The frame receiving piece 10a is moved, the Ri Kuwawa shakes the elastic member 12, when the insufficient only deformation of the elastic member 12, the back side with a resistor with the elastic member 12 at resettable at the bent portion with respect to the fixed piece 10b Configured and possible
The cradle receiving piece 10a which is disposed on the back side of the gantry receiving piece 10a, which is opposite to the supporting gantry A, is pressed against the side surface of the supporting gantry A which has swayed and moved to the back together with the elastic member 12. And a damper member 20 that moves to the back with resistance.

請求項２に記載の減震装置Ｂの弾性部材１２は、高減衰積層エラストマで構成され、支持架台Ａの側面に対する弾性部材１２の当接面１３の接触面積が、支持架台Ａの揺れに合わせて増大するようになっていることを特徴とする。   The elastic member 12 of the vibration damping device B according to claim 2 is made of a high-attenuation laminated elastomer, and the contact area of the contact surface 13 of the elastic member 12 with the side surface of the support frame A matches the swing of the support frame A. It is characterized by increasing.

請求項３に記載の減震装置Ｂの高減衰積層エラストマで構成された弾性部材１２は、硬度や粘性が異なるエラストマ１２ａ〜１２ｃの積層構造で構成されていることを特徴とする。   The elastic member 12 made of the high-damping laminated elastomer of the vibration damping device B according to claim 3 is made of a laminated structure of elastomers 12a to 12c having different hardness and viscosity.

このように後付けの減震装置Ｂが設置された支持架台Ａに対して、減震装置Ｂの弾性部材１２の弾性変形の範囲を超えるような大きい揺れが入力した場合、揺れを発生した支持架台Ａにて弾性部材１２が変形した状態で、更に架台受け片１０ａが例えば大きく撓んで背方に移動し、架台受け片１０ａの背方に設けられたダンパー部材２０を後方に押し出すことになる。この間に揺れのエネルギーが熱に変換されて大きく減衰し、これに依り揺れが抑制される。この場合、ダンパー部材２０は架台受け片１０ａの背面に接して配置されている場合（図５）と、僅かな隙間（図示せず）を設けて配置されている場合とがある。前者は架台受け片１０ａが後方に移動すれば直ちに架台受け片１０ａと共に背方に移動することになるが、後者の場合は隙間の分だけ架台受け片１０ａの前後の移動分だけ余裕がある。   When a large shaking exceeding the range of elastic deformation of the elastic member 12 of the seismic reduction device B is input to the support platform A on which the retrofitting seismic reduction device B is installed in this way, the support gantry that has generated the shaking In the state where the elastic member 12 is deformed in A, the gantry receiving piece 10a is further bent, for example, greatly moved to the back, and the damper member 20 provided on the back of the gantry receiving piece 10a is pushed backward. During this time, the energy of shaking is converted to heat and greatly attenuated, thereby suppressing the shaking. In this case, the damper member 20 may be disposed in contact with the back surface of the gantry receiving piece 10a (FIG. 5) or may be disposed with a slight gap (not shown). In the former case, if the gantry receiving piece 10a moves rearward, it immediately moves to the back together with the gantry receiving piece 10a. In the latter case, there is an allowance for the movement of the gantry receiving piece 10a before and after the gap.

揺れが更に大きい場合には、架台受け片１０ａと共にダンパー部材２０も背方に大きく押しやられるが、ダンパー部材２０は抵抗を持って共に移動することになるので、ダンパー部材２０が破損しない限り、支持架台Ａの倒壊は避けられる。この減震装置Ｂは後付けであるから、いつでも必要な数だけ必要な場所に増設することができる。   When the shaking is further large, the damper member 20 is also greatly pushed backward together with the gantry receiving piece 10a. However, since the damper member 20 moves together with resistance, it is supported as long as the damper member 20 is not damaged. Collapse of the gantry A is avoided. Since this seismic reduction device B is retrofitted, it can be added to the required location at the required number at any time.

また、高減衰積層エラストマ１２ａ〜１２ｃで構成された弾性部材１２の、上部架台２に対する当接面１３に接触面積が、上部架台２に揺れに合わせて増大するようになっているので、揺れに合わせて弾性部材１２の減衰力を増減させることができ、ある程度の地震に対しては弾性部材１２で対処することができる。   In addition, since the contact area of the elastic member 12 composed of the high damping laminated elastomers 12a to 12c on the contact surface 13 with respect to the upper frame 2 is increased in accordance with the vibration of the upper frame 2, In addition, the damping force of the elastic member 12 can be increased or decreased, and the elastic member 12 can cope with a certain degree of earthquake.

加えて高減衰積層で構成された弾性部材１２は、硬度や粘性が異なるエラストマ１２ａ〜１２ｃの積層構造であるから、積層の方法によって減衰性能を調整できる。   In addition, since the elastic member 12 configured by high attenuation lamination has a laminated structure of elastomers 12a to 12c having different hardness and viscosity, the damping performance can be adjusted by the lamination method.

本発明の減震装置の設置状況の第１実施例の正面図である。It is a front view of 1st Example of the installation condition of the earthquake-reduction apparatus of this invention. 本発明の減震装置の設置状況の第２実施例の正面図である。It is a front view of 2nd Example of the installation condition of the vibration reducing apparatus of this invention. 図１のストッパ機構の部分拡大断面図である。It is a partial expanded sectional view of the stopper mechanism of FIG. 図１の斜視図である。FIG. 2 is a perspective view of FIG. 1. 本発明の減震装置の正面図である。It is a front view of the vibration isolator of the present invention. 図５の平面図である。FIG. 6 is a plan view of FIG. 5. 図５の背面図である。FIG. 6 is a rear view of FIG. 5. 高減衰積層エラストマで構成された弾性部材の正面図である。It is a front view of the elastic member comprised with the high damping laminated elastomer.

以下、本発明を図面に従って説明する。本発明の減震装置Ｂが設置される支持架台Ａには図１、３〜７に示す防振架台と図２に示す負荷Ｗを載置するための台などがあるが、本発明では、防振架台をその代表例（第１実施例）とし、符号Ａを付して説明する。本発明の減震装置Ｂは、防振架台Ａの周囲の適所に後付けで配置して防振架台Ａの上部架台２の揺れを抑制するものである。防振架台Ａは下部架台１、上部架台２、防振具３、及びストッパ機構Ｄで構成されている。下部架台１は床面５０に固定されている。   The present invention will be described below with reference to the drawings. The support base A on which the vibration damping device B of the present invention is installed includes a vibration isolation base shown in FIGS. 1 and 3 to 7 and a base for placing the load W shown in FIG. A vibration isolator will be described as a representative example (first embodiment) with reference numeral A. The anti-seismic device B of the present invention is retrofitted to an appropriate place around the anti-vibration gantry A and suppresses the shaking of the upper gantry 2 of the anti-vibration gantry A. The anti-vibration base A includes a lower base 1, an upper base 2, a vibration isolator 3, and a stopper mechanism D. The lower gantry 1 is fixed to the floor surface 50.

上部架台２と下部架台１の外枠は、通常、長短２本ずつの鋼材を矩形に溶接したもので、下部架台１の四隅にコーナー部材４が配置されている。下部架台１のコーナー部材４は、正面視コ字形で２つの外側面が開放している部材で、下片４ａにアンカーボルト孔４ｂが穿設されている。そして上片４ｃにはストッパ機構Ｄのストッパボルト４１の下端部がナット掛けにて取り付けられている（図３）。   The outer frames of the upper frame 2 and the lower frame 1 are generally made by welding two long and short steel materials in a rectangular shape, and corner members 4 are arranged at the four corners of the lower frame 1. The corner member 4 of the lower gantry 1 is a member that is U-shaped in a front view and has two outer surfaces open. An anchor bolt hole 4b is formed in the lower piece 4a. And the lower end part of the stopper bolt 41 of the stopper mechanism D is attached to the upper piece 4c with a nut hook (FIG. 3).

上部架台２の短辺部材２ａのコーナー部分にストッパ孔２ｂが穿設されており、ストッパ孔２ｂに段付きゴム座金４２が嵌め込まれている。なお、上部架台２には取付フレーム２ｄが短辺部材２ａに平行に２本懸け渡されており、取付孔２ｅが形成されている。更に、上部架台２の内側にはコンクリート２ｆが充填されている。   A stopper hole 2b is formed in a corner portion of the short side member 2a of the upper pedestal 2, and a stepped rubber washer 42 is fitted into the stopper hole 2b. Note that two mounting frames 2d are suspended from the upper frame 2 in parallel with the short-side member 2a, and a mounting hole 2e is formed. Furthermore, the inside of the upper mount 2 is filled with concrete 2f.

防振具３は、周知の構造のもので、基台３ａと、基台３ａ上に取り付けられ、中空で下面開口、上端面閉塞状、且つ周面が多段の蛇腹が形成され、上部架台２を直接支える樹脂製の蛇腹部材３ｂと、蛇腹部材３ｂ内に設けられたコイルばね３ｃとで構成されており、基台３ａの底面に設けられたスライド溝３ｄによって下部架台１上を移動させて任意の場所に設置することができ、上部架台２はコイルばね３ｃによって支持されている。防振具３は上部架台２と下部架台１間で複数個所に設置されている。   The vibration isolator 3 has a well-known structure, and is attached to the base 3a and the base 3a. The antivibration tool 3 is hollow and has a bottom opening, a closed upper end surface, and a multi-stage bellows. And a coil spring 3c provided in the bellows member 3b, and is moved on the lower frame 1 by a slide groove 3d provided on the bottom surface of the base 3a. The upper frame 2 can be installed at an arbitrary place, and is supported by a coil spring 3c. The vibration isolator 3 is installed at a plurality of locations between the upper frame 2 and the lower frame 1.

ストッパ機構Ｄは、ストッパボルト４１、段付きゴム座金４２、減震ワッシャ４３、座金４４及びナット４５で構成されている。ストッパボルト４１の下部がコーナー部材４の上片４ｃのボルト孔に挿通され、その上下から座金４４を介してナット止めされている。ストッパボルト４１の上部は、短辺部材２ａの両端に穿設されたストッパ孔２ｂに取り付けられた段付きゴム座金４２の貫通孔に挿通され、ストッパ孔２ｂの上方に上方への振れを制限するナット４５が固定されている。そして、段付きゴム座金４２の下面とコーナー部材４の上片４ｃ上のナット４５との間に、段付きゴム座金４２の下面及び前記ナット４５に非接触にてストッパボルト４１に減震ワッシャ４３が螺着されている。   The stopper mechanism D includes a stopper bolt 41, a stepped rubber washer 42, a vibration reducing washer 43, a washer 44 and a nut 45. The lower part of the stopper bolt 41 is inserted into the bolt hole of the upper piece 4 c of the corner member 4, and is fastened with a nut through a washer 44 from above and below. The upper portion of the stopper bolt 41 is inserted into a through hole of a stepped rubber washer 42 attached to the stopper hole 2b drilled at both ends of the short side member 2a, and restricts upward deflection above the stopper hole 2b. A nut 45 is fixed. Then, between the lower surface of the stepped rubber washer 42 and the nut 45 on the upper piece 4 c of the corner member 4, the vibration reducing washer 43 is attached to the stopper bolt 41 without contacting the lower surface of the stepped rubber washer 42 and the nut 45. Is screwed.

本発明にかかる防振架台Ａは、コーナー部材４のアンカーボルト孔４ｂを利用して床面５０に植設されたアンカーボルト５１にて床面５０に固定されている。そして、防振架台Ａの周囲に減震装置Ｂが同様に床面５０或いは下部架台１に溶接接合などによって増設された増設架台１ａ上に固定される。勿論、スペースがある場合には増設架台１ａを設けず、直接、下部架台１に設置してもよいし、同様に増設架台１ａを設けずに、床面５０にアンカーボルト５１を植設し、減震装置Ｂも取り付けてもよい（図示せず）。本発明は後付けの減震装置Ｂであるから増設架台１ａを下部架台１の側面の必要個所に溶接接合にて増設するものとする。   The anti-vibration mount A according to the present invention is fixed to the floor surface 50 with anchor bolts 51 planted on the floor surface 50 using the anchor bolt holes 4b of the corner member 4. And the vibration isolator B is similarly fixed to the floor 50 or the extension stand 1a extended to the lower stand 1 by welding joining around the vibration isolator stand A. Of course, when there is a space, the extension base 1a may not be provided, and may be installed directly on the lower base 1, or similarly, the anchor bolt 51 is implanted on the floor 50 without providing the extension base 1a. A vibration damping device B may also be attached (not shown). Since the present invention is a retrofitted seismic reduction device B, it is assumed that the extension base 1a is added to a necessary portion on the side surface of the lower base 1 by welding.

減震装置Ｂの実施例は、図５〜７に示すように、支持部材１０、弾性部材１２及びダンパー部材２０とで構成されている。支持部材１０は、例えば、厚手の板金をＬ形に折り曲げた形状のもので、増設架台１ａ上に固定される固定片１０ｂと弾性部材１２を装着するための架台受け片１０ａとで構成される。固定片１０ｂに対して架台受け片１０ａの内隅角度θは、９０°に近い鋭角である。架台受け片１０ａにある程度の力を加えると固定片１０ｂに対する屈曲部分で弾性変形を生ずる。   As shown in FIGS. 5 to 7, the embodiment of the vibration damping device B includes a support member 10, an elastic member 12, and a damper member 20. The support member 10 has, for example, a shape obtained by bending a thick sheet metal into an L shape, and includes a fixed piece 10b fixed on the additional mount 1a and a mount receiving piece 10a for mounting the elastic member 12. . The inner corner angle θ of the gantry receiving piece 10a with respect to the fixed piece 10b is an acute angle close to 90 °. When a certain amount of force is applied to the gantry receiving piece 10a, elastic deformation occurs at the bent portion with respect to the fixed piece 10b.

弾性部材１２は、例えば、厚手の高減衰積層エラストマが用いられる。勿論、高減衰積層エラストマに限られるものではなく、ブチルゴム、シリコンゴムその他各種ゴム、ゴムやその一種で反発力の殆んどない低反発ゴムが使用できる。本実施例の弾性部材１２は厚手の長方形で、当接面１３の下部が前記内隅角度θと等しい角度で切落されている。この部分は設置状態で上部架台２の側面に平行な面で、この部分を第１当接面１３ａとする。そして、第１当接面１３ａより上の部分を第２当接面１３ｂとする。第２当接面１３ｂは角度θで上部架台２の側面に対して上に行くに従って次第に離間する登り傾斜している。これにより、支持架台Ａの側面に対する弾性部材１２の当接面１３の接触面積が、支持架台Ａの揺れに合わせて増大するようになっている。このような作用効果は上記構成だけで生じるものでなく、図示していないが、当接面に突起を形成したり、弾性部材を当接面方向に向かってその直径を次第に漸減させる角錐や円錐など錐形に形成してもよい。   As the elastic member 12, for example, a thick high attenuation laminated elastomer is used. Of course, the present invention is not limited to the high damping laminated elastomer, and butyl rubber, silicon rubber and other various rubbers, rubbers or a kind thereof, and a low repulsion rubber having little repulsive force can be used. The elastic member 12 of this embodiment is a thick rectangle, and the lower part of the contact surface 13 is cut off at an angle equal to the inner corner angle θ. This portion is a surface parallel to the side surface of the upper frame 2 in the installed state, and this portion is referred to as a first contact surface 13a. A portion above the first contact surface 13a is defined as a second contact surface 13b. The second abutting surface 13b is inclined upward and gradually away from the side surface of the upper frame 2 at an angle θ. Thereby, the contact area of the contact surface 13 of the elastic member 12 with respect to the side surface of the support base A increases in accordance with the shaking of the support base A. Such an effect does not occur only in the above configuration, and although not shown, a pyramid or cone that forms a protrusion on the contact surface or gradually reduces the diameter of the elastic member toward the contact surface. It may be formed in a cone shape.

また、弾性部材１２の積層体は全体を同じ硬さの高減衰積層エラストマで形成しても良いが、例えば、接触外層と内層とで構成し、いずれか一方に対して他方を硬くするようにしてもよい。また、図８のように、支持部材１０の架台受け片１０ａに基層のエラストマ１２ａが貼り付けられ、第１金属板１２ｆを介して中間層のエラストマ１２ｂが貼り付けられ、第２金属板１２ｇを介して表層のエラストマ１２ｃが積層されている。各層のエラストマ１２ａ〜１２ｃを同じ硬度や粘性のものを使用してもよいが、各層毎に、例えば基層のエラストマ１２ａが最も硬く（或いは柔らかく）、表層のエラストマ１２ｃが最も柔らかく（或いは最も柔らかく）なるように順次硬度変えてもよいし、粘性を変えてもよい。また、揺れのエネルギーを早期に減衰させるために柔らかいエラストマを表層に、これより硬いエラストマを中間層や基層に用いるようにしてもよい。このように硬度や粘性が異なるエラストマの積層構造とすることで、負荷Ｗに合わせて減衰性能を調整できるし、弾性部材１２に対して垂直方向の力だけでなく、剪断方向の力も加わることがあるが、金属板１２ｆ・１２ｇ間のエラストマ１２ａ〜１２ｃが圧縮されながら剪断方向に平行にずれ、剪断方向の力も減衰することになる。また、図示しないが、弾性部材１２の第１当接面１３ａを上部架台２の側面に接触させていてもよいし、図のように僅かな隙間Ｓを設けてもよい。   The laminated body of the elastic member 12 may be entirely formed of a high-damping laminated elastomer having the same hardness. For example, the elastic member 12 is composed of a contact outer layer and an inner layer, and the other is hardened with respect to either one. May be. Further, as shown in FIG. 8, the base layer elastomer 12a is attached to the gantry receiving piece 10a of the support member 10, the intermediate layer elastomer 12b is attached via the first metal plate 12f, and the second metal plate 12g is attached. A surface layer of elastomer 12c is laminated. Elastomers 12a to 12c of the respective layers may have the same hardness or viscosity. For each layer, for example, the base layer elastomer 12a is the hardest (or softest), and the surface layer elastomer 12c is the softest (or softest). Thus, the hardness may be changed sequentially or the viscosity may be changed. Further, a soft elastomer may be used for the surface layer, and a harder elastomer may be used for the intermediate layer or the base layer in order to attenuate the vibration energy at an early stage. By using an elastomer laminated structure with different hardness and viscosity, the damping performance can be adjusted according to the load W, and not only the force in the vertical direction but also the force in the shearing direction can be applied to the elastic member 12. However, the elastomers 12a to 12c between the metal plates 12f and 12g are displaced in parallel with the shear direction while being compressed, and the force in the shear direction is also attenuated. Moreover, although not shown in figure, the 1st contact surface 13a of the elastic member 12 may be made to contact the side surface of the upper mount frame 2, and the slight clearance S may be provided like a figure.

ダンパー部材２０は、受けプレート２０ａ、ダンパープレート２０ｂ及び補強リブ２０ｃとで構成され、ダンパープレート２０ｂの前端に前述の内隅角度θより９０°に近い角度で立設された受けプレート２０ａが架台受け片１０ａに面して立設されている。そして、受けプレート２０ａの背面にて受けプレート２０ａとダンパープレート２０ｂの間にこれらに直交して補強リブ２０ｃが平行に立設されている。ダンパープレート２０ｂの両側縁には補強リブ２０ｃの外側にてこれに平行に、換言すれば受けプレート２０ａに向かう長孔２０ｄが平行に穿設されている。長孔２０ｄの長さは、地震発生時に加わる下部架台１に対する上部架台２の相対変位に対してストッパ機構Ｄが破損しない範囲が選ばれる。換言すれば、上部架台２が大きく揺れ、ストッパボルト４１に大きな曲げモーメントが加わる前に長孔２０ｄの端に締付ボルト２０ｅが衝突してダンパー部材２０がそれ以上後退しないことを意味する。   The damper member 20 includes a receiving plate 20a, a damper plate 20b, and a reinforcing rib 20c. A receiving plate 20a is installed at the front end of the damper plate 20b at an angle closer to 90 ° than the aforementioned inner corner angle θ. It is erected facing the piece 10a. In addition, reinforcing ribs 20c are erected in parallel between the receiving plate 20a and the damper plate 20b on the back surface of the receiving plate 20a so as to be orthogonal thereto. On both side edges of the damper plate 20b, a long hole 20d is formed in parallel to the outside of the reinforcing rib 20c, in other words, in parallel to the receiving plate 20a. The length of the long hole 20d is selected so that the stopper mechanism D is not damaged by the relative displacement of the upper frame 2 with respect to the lower frame 1 applied when an earthquake occurs. In other words, it means that the upper base 2 is greatly shaken and the fastening bolt 20e collides with the end of the long hole 20d before a large bending moment is applied to the stopper bolt 41, so that the damper member 20 does not retreat further.

支持部材１０の固定片１０ｂは増設架台１ａにボルトで強固に固定されている。一方、ダンパー部材２０の受けプレート２０ａはその先端が支持部材１０の架台受け片１０ａの背面に線接触にて当接（或いは図示していないが若干の隙間を設けて配置）している。そして、ダンパー部材２０のダンパープレート２０ｂはその長孔２０ｄにて支持部材１０の固定片１０ｂに固定されている。この固定は締付ボルト２０ｅにて強固に締め付けられておらず、架台受け片１０ａが背方に押圧されて弾性的に撓んだ時にある程度の抵抗をもって背方に滑り移動する程度に締め付けられている。   The fixed piece 10b of the support member 10 is firmly fixed to the extension frame 1a with a bolt. On the other hand, the end of the receiving plate 20a of the damper member 20 is in contact with the back surface of the gantry receiving piece 10a of the support member 10 by line contact (or is arranged with a slight gap though not shown). The damper plate 20b of the damper member 20 is fixed to the fixed piece 10b of the support member 10 through the long hole 20d. This fixing is not firmly tightened by the tightening bolt 20e, but is tightened to such an extent that when the gantry receiving piece 10a is elastically bent by being pushed backward, it slides backward with some resistance. Yes.

しかして、地震が発生すると地震の揺れに合わせて床面５０に設置された下部架台１が上部架台２に対して相対的に移動し、その結果、負荷Ｗと共に上部架台２が地震の振幅に合わせて揺れる。揺れが通常の振幅である場合には、防振具３によってその揺れが遮断される。   Thus, when an earthquake occurs, the lower frame 1 installed on the floor 50 moves relative to the upper frame 2 in accordance with the shaking of the earthquake, and as a result, the upper frame 2 together with the load W changes to the amplitude of the earthquake. Shake together. When the vibration has a normal amplitude, the vibration is blocked by the vibration isolator 3.

揺れが通常より大きい場合には、上部架台２の側面が弾性部材１２の第１当接面１３ａに衝突し、第１当接面１３ａとその周辺部分までを圧縮する。弾性部材１２は高減衰積層エラストマで形成されているので、圧縮されたときに振動エネルギーを熱に変え且つこれ放散して揺れを急速に減衰させる。揺れが大きくなると、弾性部材１２の第１当接面１３ａを超えて第２当接面１３ｂまで変形することになる。第２当接面１３ｂは上部架台２の側面に対して傾斜しているので、揺れに合わせてその変形量が漸増する。これによって地震の大きさに応じて弾性部材１２による減震効果を変化させることができる。   When the shaking is larger than usual, the side surface of the upper gantry 2 collides with the first contact surface 13a of the elastic member 12, and compresses the first contact surface 13a and its peripheral portion. Since the elastic member 12 is formed of a highly damped laminated elastomer, when compressed, the vibration energy is converted into heat and dissipated to rapidly dampen the vibration. When the vibration increases, the elastic member 12 is deformed beyond the first contact surface 13a to the second contact surface 13b. Since the second contact surface 13b is inclined with respect to the side surface of the upper pedestal 2, the amount of deformation gradually increases in accordance with the shaking. Thereby, the seismic reduction effect by the elastic member 12 can be changed according to the magnitude of the earthquake.

揺れが大きくて弾性部材１２の変形だけでは不足の場合、架台受け片１０ａの屈曲基部が背方に撓む。この弾性撓みにより架台受け片１０ａの背面に当接して配置されていたダンパー部材２０の受けプレート２０ａが締付ボルト２０ｅの締め付け力による抵抗を示しながら揺れ輻だけ後退する。この時、地震による揺れ輻が長孔２０ｄの長さを越えたとしても、締付ボルト２０ｅが切断されない限り、その地点でダンパー部材２０は停止し、上部架台２のそれ以上の揺れを阻止する。この時、ストッパ機構Ｄのストッパボルト４１は段付きゴム座金４２の貫通孔の内周面に弾接し、ダンパー部材２０と協働して揺れを減衰させる。そして、前述のように長孔２０ｄの長さはストッパ機構Ｄのストッパボルト４１が破損しない範囲になっているので、防振架台Ａに搭載されている負荷Ｗの転倒は免れる。   When the shaking is large and the deformation of the elastic member 12 is insufficient, the bent base portion of the gantry receiving piece 10a is bent backward. Due to this elastic deflection, the receiving plate 20a of the damper member 20 arranged in contact with the back surface of the gantry receiving piece 10a moves backward by the swaying radiation while showing resistance due to the tightening force of the tightening bolt 20e. At this time, even if the shaking radiation due to the earthquake exceeds the length of the long hole 20d, the damper member 20 stops at that point unless the fastening bolt 20e is cut and prevents further shaking of the upper frame 2. . At this time, the stopper bolt 41 of the stopper mechanism D elastically contacts the inner peripheral surface of the through hole of the stepped rubber washer 42 and attenuates the vibration in cooperation with the damper member 20. As described above, since the length of the long hole 20d is in a range in which the stopper bolt 41 of the stopper mechanism D is not damaged, the fall of the load W mounted on the anti-vibration mount A can be avoided.

なお、図２は支持架台Ａが固定の枠台で形成されている場合で、防振具３の装備はない。それ故、揺れによって防振具３による大きな揺れはないが、前述のように重量負荷Ｗの場合には、アンカーボルト５１の破損による損傷発生も懸念されるため、その周囲に本発明の減震装置Ｂを設置することで実施例１と同様、効果的な転倒を防止できる。   FIG. 2 shows a case where the support frame A is formed of a fixed frame, and the vibration isolator 3 is not provided. Therefore, although there is no large vibration caused by the vibration isolator 3 due to the vibration, in the case of the heavy load W as described above, there is a concern about the occurrence of damage due to the breakage of the anchor bolt 51. By installing the apparatus B, it is possible to prevent an effective fall as in the first embodiment.

Ａ：支持架台、Ｂ：減震装置、Ｗ：負荷、Ｄ：ストッパ機構、Ｓ：隙間、θ：内隅角度、１：下部架台、１ａ：増設架台、２：上部架台、２ａ：短辺部材、２ｂ：ストッパ孔、２ｄ：取付フレーム、２ｅ：取付孔、２ｆ：コンクリート、３：防振具、３ａ：基台、３ｂ：蛇腹部材、３ｃ：コイルばね、３ｄ：スライド溝、４：コーナー部材、４ａ：下片、４ｂ：アンカーボルト孔、４ｃ：上片、１０：支持部材、１０ａ：架台受け片、１０ｂ：固定片、１２：弾性部材、１２ａ〜１２ｃ：エラストマ、１２ｆ・１２ｇ：金属板、１３：当接面、１３ａ：第１当接面、１３ｂ：第２当接面、２０：ダンパー部材、２０ａ：受けプレート、２０ｂ：ダンパープレート、２０ｃ：補強リブ、２０ｄ：長孔、２０ｅ：締付ボルト、４１：ストッパボルト、４２：段付きゴム座金、４３：減震ワッシャ、４４：座金、４５：ナット、５０：床面、５１：アンカーボルト。   A: support frame, B: vibration reduction device, W: load, D: stopper mechanism, S: gap, θ: inner corner angle, 1: lower frame, 1a: additional frame, 2: upper frame, 2a: short side member 2b: stopper hole, 2d: mounting frame, 2e: mounting hole, 2f: concrete, 3: vibration isolator, 3a: base, 3b: bellows member, 3c: coil spring, 3d: slide groove, 4: corner member 4a: lower piece, 4b: anchor bolt hole, 4c: upper piece, 10: support member, 10a: mount receiving piece, 10b: fixed piece, 12: elastic member, 12a to 12c: elastomer, 12f, 12g: metal plate , 13: contact surface, 13a: first contact surface, 13b: second contact surface, 20: damper member, 20a: receiving plate, 20b: damper plate, 20c: reinforcing rib, 20d: long hole, 20e: Tightening bolt 41: Stopper bolt , 42: stepped rubber washer, 43: GenShin washer, 44: washer, 45: Nut, 50: floor 51: anchor bolt.

Claims (3)

厚手の板金をＬ形に折り曲げて形成され、負荷支持用の支持架台の側方に固定される固定辺および、支持架台の側面に面接するように設けられた架台受け片を有する支持部材と、
前記架台受け片に固定され、支持架台の側面に接して又は隙間を設けて設置された弾性部材と、
前記架台受け片は、弾性部材に揺れが加わり、前記弾性部材の変形だけでは不足の時、前記固定片に対する屈曲部分において復帰可能にて前記弾性部材と共に抵抗を持って背方に移動可能に構成され、
前記支持架台の反対側である、架台受け片の背面側に配置され、揺れを発生した支持架台の側面に前記弾性部材が押圧され、前記弾性部材と共に背方に移動した前記架台受け片に押圧され、抵抗を持って背方に移動するダンパー部材とで構成されていることを特徴とする減震装置。 Is formed by bending a thick metal plate in an L shape, and the support member having a load fixed sides Ru fixed on the side of supporting the support cradle and cradle receiving piece provided so as to interview the side surface of the support cradle,
An elastic member fixed to the gantry receiving piece and installed in contact with the side surface of the support gantry or with a gap;
The frame receiving piece, Ri Kuwawa shakes the elastic member, wherein when the shortage alone deformation of the elastic member, movably to the dorsally with resistive together with the elastic member at resettable at the bent portion with respect to the fixed piece Configured,
The opposite side of the support cradle, disposed on the back side of the pedestal receiving piece, the elastic member is pressed against the side surface of the support cradle that occurred shaking, pressing the frame receiving piece that has moved to the back side with said resilient member And a damper member that moves to the back with resistance. 弾性部材は、高減衰積層エラストマで構成され、支持架台の側面に対する弾性部材の当接面の接触面積が、支持架台の揺れに合わせて増大するようになっていることを特徴とする請求項１に記載の減震装置。   2. The elastic member is made of a highly damped laminated elastomer, and the contact area of the contact surface of the elastic member with the side surface of the support frame increases in accordance with the shaking of the support frame. The seismic reduction device described in 1. 弾性部材は、硬度や粘性が異なるエラストマの積層構造で構成されていることを特徴とする請求項２に記載の減震装置。   The vibration-reducing device according to claim 2, wherein the elastic member has a laminated structure of elastomers having different hardness and viscosity.
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