JPH088364Y2 - Anti-vibration device - Google Patents
Anti-vibration deviceInfo
- Publication number
- JPH088364Y2 JPH088364Y2 JP1987091843U JP9184387U JPH088364Y2 JP H088364 Y2 JPH088364 Y2 JP H088364Y2 JP 1987091843 U JP1987091843 U JP 1987091843U JP 9184387 U JP9184387 U JP 9184387U JP H088364 Y2 JPH088364 Y2 JP H088364Y2
- Authority
- JP
- Japan
- Prior art keywords
- movable side
- elastic
- movable
- side member
- vibration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Floor Finish (AREA)
- Vibration Prevention Devices (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は、地震から建物や精密機械類を保護するた
め、或いは振動発生源が周囲に与える弊害を防止するた
めの防振装置に関し、特に、固定側と可動側との間に生
じる上下方向の相対変位は勿論のこと、水平方向の相対
変位にも対しても安定して効果的に対処し得る防振装置
に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a vibration isolator for protecting buildings and precision machinery from an earthquake, or for preventing an adverse effect of a vibration source on the surroundings. The present invention relates to an anti-vibration device capable of stably and effectively coping with not only vertical relative displacement occurring between a fixed side and a movable side but also horizontal relative displacement.
例えば、建物の土台や精密機械類或いは往復動機器等
の設置床である固定側と、建物や精密機械および往復動
機器等の可動側との間における水平および上下方向の相
対変位に対処するための防振装置としては、例えば、特
開昭54−134269号公報にみられるようなものが既に知ら
れている。For example, to deal with horizontal and vertical relative displacement between the fixed side, which is the base of the building, the floor on which precision machinery or reciprocating equipment is installed, and the movable side, such as the building, precision machinery, and reciprocating equipment. As the anti-vibration device described in JP-A-54-134269, for example, the one already known is known.
すなわち、このものは、建物の土台や精密機械類或い
は往復動機器等の設置床である固定側に対して設置され
る固定側部材と可動側を支持する可動側部材のそれぞれ
の対向面を球面凹部として形成し、これら球面凹部の間
にスチールボールを介在させて固定側部材に対して可動
側部材を所定位置に保つと共に、地震等で固定側部材に
加わった振動、或いは往復動機器等の振動発生源から可
動側部材に加わった振動のうちの水平方向分を、これら
球面凹部の間で転動するスチールボールにより遮断して
可動側部材或いは固定側部材に伝達するのを防止するよ
うにしている。That is, this is a spherical surface on the opposite side of the fixed side member and the movable side member that supports the movable side, which are installed on the fixed side, which is the base of the building, or the installation floor of precision machinery or reciprocating equipment. It is formed as a concave portion, and a steel ball is interposed between these spherical concave portions to keep the movable side member at a predetermined position with respect to the fixed side member, and vibration applied to the fixed side member due to an earthquake or the like, or reciprocating equipment, etc. The horizontal component of the vibration applied from the vibration source to the movable member is blocked by the steel balls rolling between the spherical concave portions to prevent transmission to the movable member or the fixed member. ing.
また、同時に、可動側部材上に上下方向へと向けて伸
縮可能のコイルスプリングを備えた弾性支持部材を装着
し、この弾性支持部材を介して建物や精密機械類或いは
往復動機器等を支持することで、前記振動のうちの垂直
方向分を弾性支持部材に内装した弾性機構であるコイル
スプリングで吸収してその振動の伝達を緩和するように
している。At the same time, an elastic supporting member provided with a coil spring that is capable of expanding and contracting in the vertical direction is mounted on the movable side member, and a building, precision machinery, reciprocating device, etc. are supported via this elastic supporting member. As a result, a vertical portion of the vibration is absorbed by the coil spring, which is an elastic mechanism installed in the elastic support member, and the transmission of the vibration is moderated.
しかし、かかる防振装置にあっては、水平方向に対す
る制振機構の振動系自体が球面凹部と当該球面凹部を転
動するスチールボールとで構成してあるために、これら
球面凹部の半径をR,スチールボールの半径をｒとしたと
きの振動系の固有振動数fnが、 となり、上式から分かるように、これら球面凹部の半径
Ｒとスチールボールの半径ｒが決まると「fn＝一定」と
なって、常に固有振動数が一定値を保つことから所謂ば
ね−質量系と同等の作用を行う。However, in such a vibration isolator, since the vibration system itself of the vibration damping mechanism in the horizontal direction is composed of spherical concave portions and steel balls rolling on the spherical concave portions, the radius of these spherical concave portions is R Then, the natural frequency fn of the vibration system when the radius of the steel ball is r is As can be seen from the above equation, when the radius R of these spherical concave portions and the radius r of the steel ball are determined, “fn = constant” and the natural frequency is always kept at a constant value. Do the same.
その結果、可動側の固有振動数は、固定側と可動側間
の相対変位の大小即ち振幅の大小によって変化せず、し
たがって、加振振動数が可動側の固有振動数に一致する
と当該可動側が共振を起こすことになる。As a result, the natural frequency of the movable side does not change depending on the magnitude of the relative displacement between the fixed side and the movable side, that is, the magnitude of the amplitude.Therefore, when the vibration frequency matches the natural frequency of the movable side, It will cause resonance.
そのために、可動側の固有振動数を考慮してその都度
球面凹部の半径Ｒとスチールボールの半径ｒを設計し直
すなり、或いは、どんな振動にも対処しようとするなら
ば共振防止用の減衰器の使用が必須となり、その結果、
固定側と可動側間の振動絶縁効果が阻害されて防振機能
が低下するという欠点をもつ。Therefore, the radius R of the spherical recess and the radius r of the steel ball must be redesigned in consideration of the natural frequency of the movable side, or if any vibration is to be dealt with, an attenuator for resonance prevention is used. Is mandatory, and as a result,
It has a drawback that the vibration isolation effect between the fixed side and the movable side is hindered and the vibration isolation function deteriorates.
また、上記に加えて、上下方向の防振機構としても、
コイルスプリングを内装した弾性支持部材を用いている
に過ぎないために支持力の方向が偏芯を起し易く、これ
により、支持荷重を安定して支えることができないので
荷重支持が不安定にならざるを得ないという欠点をも有
する。In addition to the above, as a vertical vibration isolation mechanism,
Since only the elastic support member containing the coil spring is used, the direction of the supporting force is likely to be eccentric, which makes it impossible to stably support the supporting load. It also has the drawback of being forced to do so.
したがって、この考案の目的は、水平方向の振動に対
して共振を起こすことなく、しかも、上下方向の振動に
対しても常に安定した荷重支持を行うことのできる防振
装置を提供することである 〔問題点を解決するための手段〕 上記の目的は、この考案によれば、固定側に設置する
固定側部材と、この固定側部材の上にスチールボールを
介して水平方向へと移動可能に載置した水平方向支持機
構である可動側部材と、この可動側部材の上に上下方向
へと向けて伸縮可能に装着した上下方向支持機構である
弾性支持部材とを通して可動側を支持するようにした防
振装置において、固定側部材の底部上面を中心部分から
外周側へと向かって直線状の登り勾配となる円錐状凹部
として形成し、この円錐状凹部の上に可動側部材を下部
に設けたスチールボールを介して転動自在に載置すると
共に、弾性支持部材を伸側へと向かって付勢する弾性機
構を内装した伸縮自在の内筒と外筒とで構成し、これら
内外筒の対向面に軸受部材を介装することによって達成
することができる。Therefore, it is an object of the present invention to provide a vibration isolator which does not resonate with respect to horizontal vibrations and can always carry out stable load support against vertical vibrations. [Means for Solving the Problems] According to the present invention, the above-described object is to provide a fixed-side member to be installed on the fixed side, and a horizontally movable via a steel ball on the fixed-side member. The movable side is supported by the mounted movable side member, which is the horizontal direction supporting mechanism, and the elastic support member, which is the vertical direction supporting mechanism, which is mounted on the movable side member so as to extend and contract in the vertical direction. In the vibration isolator described above, the bottom surface of the fixed-side member is formed as a conical concave portion that has a linear upward slope from the central portion toward the outer peripheral side, and the movable-side member is provided at the lower portion on the conical concave portion. Stee It is composed of an expandable inner cylinder and an outer cylinder, which are mounted rotatably via balls and have an elastic mechanism for urging the elastic support member toward the extension side. The inner and outer cylinders face each other. This can be achieved by interposing a bearing member on the.
すなわち、可動側部材のスチールボールが載る固定側
部材の底部上面を中心部分から外周側へと向かって直線
状の登り勾配となる円錐状凹部として形成したことによ
り、固定側部材と可動側部材の水平方向への相対変位の
発生時における復元力（スチールボールが円錐状凹部の
中心位置に戻ろうとする力）は、両者の相対変位の大小
即ち振幅の大小に関係なく何処の位置にあろうとも常に
円錐状凹部の傾斜角θによって一義的に決まる一定値を
保つ。That is, by forming the upper surface of the bottom portion of the fixed side member on which the steel ball of the movable side member rests as a conical recess having a linear upward slope from the central portion toward the outer peripheral side, the fixed side member and the movable side member are The restoring force (the force that the steel ball tries to return to the central position of the conical recess) at the time of the relative displacement in the horizontal direction is irrespective of the relative displacement between the two, that is, regardless of the amplitude. It always maintains a constant value that is uniquely determined by the inclination angle θ of the conical recess.
したがって、可動側部材の固有振動数fnは、振幅をａ
とすると で与えられ、これにより、可動側に共振が生じて振幅が
大きくなろうとすると固有振動数fnが変化するので、当
該可動側に共振の生じる恐れはなくなる。Therefore, the natural frequency fn of the movable member has an amplitude a
And Therefore, when resonance occurs on the movable side and the amplitude tends to increase, the natural frequency fn changes, so that there is no possibility of resonance occurring on the movable side.
さらに、上記に加えて、上下方向の支持機構である弾
性支持部材が内外筒の間に介装した軸受部材を通して伸
縮動作し、これら内外筒と軸受部材とで可動側からの偏
芯荷重を吸収しつつ且つ同芯状態を保って円滑に動作す
る。Further, in addition to the above, an elastic support member that is a vertical support mechanism expands and contracts through a bearing member interposed between the inner and outer cylinders, and the inner and outer cylinders and the bearing member absorb the eccentric load from the movable side. It operates smoothly while maintaining the concentric state.
かくして、固定側と可動側の水平方向および垂直方向
の相対変位の発生に際して、そのときどきの振幅の大小
に関係なく常に安定した防振作用を行うことが可能にな
るのである。Thus, when the relative displacement between the fixed side and the movable side in the horizontal direction and the vertical direction occurs, it is possible to always perform a stable vibration damping action regardless of the magnitude of the amplitude at that time.
以下、添付図面に基づいてこの考案による防振装置の
好ましい実施態様を説明する。Hereinafter, preferred embodiments of a vibration isolator according to the present invention will be described with reference to the accompanying drawings.
第１図は、この考案の一実施例に係る防振装置を示す
ものであって、当該防振装置は、固定側部材10と可動側
部材20および弾性支持部材30とからなっている。FIG. 1 shows a vibration isolator according to an embodiment of the present invention. The vibration isolator comprises a fixed side member 10, a movable side member 20 and an elastic support member 30.
固定側部材10は、例えば、建物の土台等の固定側Ｂに
対して設置されるもので、この実施例にあっては、凹状
ボックス型に形成されたハウジング11からなり、このハ
ウジング11の底部下面から突出する突起12を固定側Ｂに
埋設することで定着される。The fixed-side member 10 is installed, for example, on the fixed side B such as the base of a building. In this embodiment, the fixed-side member 10 includes a housing 11 formed in a concave box shape, and the bottom of the housing 11 is fixed. It is fixed by embedding the protrusion 12 projecting from the lower surface in the fixed side B.
上記ハウジング11における座部14の上面には、外周へ
と向かって直線状の登り勾配となる円錐状凹部13が形成
してあり、この円錐状凹部13の中心部分は、後に述べる
可動側部材20の大径スチールボール23の球面と同一の曲
率になるようにつくられている。On the upper surface of the seat portion 14 of the housing 11, there is formed a conical concave portion 13 having a linear upward slope toward the outer periphery, and the central portion of the conical concave portion 13 has a movable side member 20 described later. It is made to have the same curvature as the spherical surface of the large diameter steel ball 23.
また、ハウジング11の内部は油室Ｏとなっていて、当
該油室Ｏ内には適宜量の潤滑油が入れてある。Further, the inside of the housing 11 is an oil chamber O, and an appropriate amount of lubricating oil is put in the oil chamber O.
一方、可動側部材20は中央本体部21と周辺鍔部とで構
成されており、中央本体部21の下部には、スナップリン
グ24で保持された球面保持具25,26を介して大径のスチ
ールボール23が転動自在に設けられている。On the other hand, the movable side member 20 is composed of a central main body portion 21 and a peripheral flange portion, and at the lower portion of the central main body portion 21, a large diameter via a spherical holder 25, 26 held by a snap ring 24. A steel ball 23 is rotatably provided.
また、中央本体部21と球面保持具26の間には多数の小
径スチールボール27が収納されていて、これら小径のス
チールボール27を介して大径のスチールボール23を支持
することにより、大径のスチールボール23の回転摩擦力
を減じて円滑な転動を確保するようにしてある。In addition, a large number of small-diameter steel balls 27 are housed between the central body portion 21 and the spherical holder 26, and by supporting the large-diameter steel balls 23 via these small-diameter steel balls 27, a large-diameter steel ball The rolling frictional force of the steel ball 23 is reduced to ensure smooth rolling.
上記スチールボール23の一部は、可動側部材20におけ
る中央本体部21の下底から下方に向かって突出してお
り、このスチールボール23を固定側部材10の円錐状凹部
13上に載せることで可動側部材20を固定側部材10上に載
置している。A part of the steel ball 23 projects downward from the lower bottom of the central main body portion 21 of the movable side member 20, and the steel ball 23 is formed into a conical recess of the fixed side member 10.
The movable side member 20 is placed on the fixed side member 10 by placing the movable side member 20 on the fixed side member 10.
これにより、通常の状態において、重力の作用により
スチールボール23が同一曲率の円錐状凹部13の中心部分
に位置することになり、かくして、当該状態においてス
チールボール23が円錐状凹部13に及ぼす面圧を極力小さ
く保つと共に、この位置からスチールボール23が転動を
始めるときのショックをなくして円滑な作動を確保する
ことになる。As a result, in a normal state, the steel ball 23 is positioned in the central portion of the conical concave portion 13 having the same curvature due to the action of gravity, and thus the surface pressure exerted by the steel ball 23 on the conical concave portion 13 in this state. Is kept as small as possible, and a shock when the steel ball 23 starts rolling from this position is eliminated to ensure a smooth operation.
また、上記と併せて、ハウジング11の油室Ｏ内に入れ
た潤滑油が円錐状凹部13に対するスチールボール23の転
がり抵抗を減じ、これによって、スチールボール23がよ
り円滑に転動するようにしてある。Further, in addition to the above, the lubricating oil contained in the oil chamber O of the housing 11 reduces the rolling resistance of the steel ball 23 with respect to the conical recess 13, thereby allowing the steel ball 23 to roll more smoothly. is there.
可動側部材20における周辺鍔部は、中央本体部21の下
面から水平方向へと固定側部材10のハウジング11を越え
て円板状に延伸している。A peripheral flange portion of the movable side member 20 extends in a disk shape from the lower surface of the central main body portion 21 in a horizontal direction beyond the housing 11 of the fixed side member 10.
これにより、周辺鍔部は、可動側部材20の中央本体部
21と協同して下方に位置する固定側部材10の円錐状凹部
13を上方から覆うカバーとしての役目を果たすようにし
てある。As a result, the peripheral brim portion is the central body portion of the movable member 20.
A conical recess of the fixed-side member 10 located below in cooperation with 21
It serves as a cover that covers 13 from above.
さらに、弾性支持部材30は、可動側部材20における中
央本体部21の上端外周に下端を取り付けた内筒31と、当
該内筒31を覆って上方から伸縮自在に被嵌した有底状の
外筒33とを備え、これら内外筒31,33が外筒33の内周面
に固着した軸受部材34を介して摺動自在に摺接してい
る。Further, the elastic support member 30 includes an inner cylinder 31 having a lower end attached to the upper outer periphery of the central body portion 21 of the movable member 20, and a bottomed outer member that covers the inner cylinder 31 and is elastically fitted from above. The inner and outer cylinders 31, 33 are slidably slidably in contact with each other via a bearing member 34 fixed to the inner peripheral surface of the outer cylinder 33.
なお、軸受部材34は、この実施例において、外筒33の
内周面に固着してあるが、これに代えて、内筒31の外周
面側に固着するようにしてもよいことは言うまでもな
い。Although the bearing member 34 is fixed to the inner peripheral surface of the outer cylinder 33 in this embodiment, it goes without saying that it may be fixed to the outer peripheral surface side of the inner cylinder 31 instead of this. .
内筒31の上端には、その開口部を覆うようにして上面
にプレート部材35を備えた弾性体32が取り付けてあり、
この弾性体32と可動側部材20の中央本体部21とで区画さ
れた内筒31の内部が弾性機構をかたちづくる空気ばね室
Ａとなっている。An elastic body 32 having a plate member 35 on the upper surface is attached to the upper end of the inner cylinder 31 so as to cover the opening,
The inside of the inner cylinder 31 partitioned by the elastic body 32 and the central body portion 21 of the movable member 20 is an air spring chamber A forming an elastic mechanism.
外筒33は、その上面で例えば建物の床等の可動側Ｆを
支え、この状態において、当該外筒33の上部内面が内筒
31側における弾性体32のプレート部材35に当接し、空気
ばね室Ａのばね作用で可動側Ｆを弾性的に支持してい
る。The outer cylinder 33 supports the movable side F, such as the floor of the building, on its upper surface, and in this state, the upper inner surface of the outer cylinder 33 is the inner cylinder.
The elastic member 32 on the 31st side is brought into contact with the plate member 35 to elastically support the movable side F by the spring action of the air spring chamber A.
かくして、以上のように構成された防振装置は、以下
に述べるようにして動作する。Thus, the vibration isolator configured as described above operates as described below.
すなわち、地震等の振動発生源のない通常の状態にあ
っては、重力の作用により可動側部材20の大径のスチー
ルボール23が、固定側部材10における円錐状凹部13の中
心部分に位置する所定位置を保っている。That is, in a normal state where there is no vibration source such as an earthquake, the large-diameter steel ball 23 of the movable-side member 20 is located at the center of the conical recess 13 of the fixed-side member 10 due to the action of gravity. Holds in place.
また、弾性支持部材30は、内筒31と外筒33の間に介装
した軸受部材34により可動側Ｆからの偏芯荷重を吸収し
つつ、かつ、内筒31に設けた弾性体32を通して受ける空
気ばね室Ａのばね作用で上下方向の荷重を安定的に支持
している。Further, the elastic support member 30 absorbs the eccentric load from the movable side F by the bearing member 34 interposed between the inner cylinder 31 and the outer cylinder 33, and allows the elastic body 32 provided in the inner cylinder 31 to pass through. The received spring action of the air spring chamber A stably supports the vertical load.
そして、この状態から地震等が発生して固定側Ｂに振
動が生じると、当該振動中の水平方向分の振動に伴い固
定側部材10の円錐状凹部13が、可動側Ｆの慣性によりス
チールボール23を転動させつつ可動側部材20に対して水
平方向に相対変位を起こし、それにより、固定側Ｂに生
じた水平方向の振動を吸収して当該振動の可動側Ｆへの
伝達を極力軽減する。Then, when an earthquake or the like occurs from this state and vibration occurs on the fixed side B, the conical concave portion 13 of the fixed side member 10 is moved by the inertia of the movable side F due to the horizontal part vibration during the vibration. While rolling 23, relative displacement is generated in the horizontal direction with respect to the movable member 20, thereby absorbing the horizontal vibration generated on the fixed side B and reducing the transmission of the vibration to the movable side F as much as possible. To do.
なお、上記固定側部材10の水平方向への振動に際して
は、スチールボール23が円錐状凹部13の中心部分から外
周に向かって転動することになるが、円錐状凹部13の中
心部分がスチールボール23の球面と同一の曲率になるよ
うにつくられているので、スチールボール23がその部分
を円滑に転動し、したがって、ショックなくしかも極め
て微細な水平方向への振動に対しても円滑に対処し得
る。When the stationary member 10 is vibrated in the horizontal direction, the steel ball 23 rolls from the central portion of the conical recess 13 toward the outer periphery, but the central portion of the conical recess 13 is the steel ball. Since it is made to have the same curvature as the spherical surface of 23, the steel ball 23 rolls smoothly in that part, so that it can smoothly cope with shocks and extremely fine horizontal vibrations. You can
また、固定側Ｂと可動側Ｆとの相対変位によって生じ
る復元力即ちスチールボール23が円錐状凹部13の中心部
分に戻ろうとする力は、固定側Ｂと可動側Ｆとの間の相
対変位の大小即ち振幅の大小に関係なく、何処の位置に
あろうとも円錐状凹部の傾斜角θによって一義的に決ま
る一定値を保つために、先に「問題点を解決するための
手段」の「作用」の項で述べたように、可動側Ｆに共振
が生じて振幅が大きくなろうとすると固有振動数が変化
し、これによって、可動側Ｆに共振の生じる恐れはな
い。Further, the restoring force generated by the relative displacement between the fixed side B and the movable side F, that is, the force for the steel ball 23 to return to the central portion of the conical recess 13 is the relative displacement between the fixed side B and the movable side F. In order to maintain a constant value that is uniquely determined by the inclination angle θ of the conical concave portion regardless of the position, regardless of the magnitude, that is, the amplitude, the "action for solving the problem" is first mentioned. As described in the above section, when the movable side F resonates and the amplitude is increased, the natural frequency changes, and there is no possibility that the movable side F will resonate.
一方、地震等の発生により固定側Ｂに生じた振動中の
上下方向分の振動に対しては、弾性支持部材30の内外筒
31,33が軸受部材34を介して上下方向にのみ伸縮動作
し、それにより、軸受部材34を通して可動側Ｆの偏芯し
た縦揺れを阻止しつつ空気ばね室Ａのばね作用で当該振
動の可動側Ｆへの伝達を安定した状態で軽減する。On the other hand, the inner and outer cylinders of the elastic support member 30 are not affected by the vertical vibration during the vibration generated on the fixed side B due to the occurrence of an earthquake or the like.
31,33 expands and contracts only in the vertical direction via the bearing member 34, thereby preventing the eccentric pitching of the movable side F through the bearing member 34 and moving the vibration by the spring action of the air spring chamber A. The transmission to the side F is reduced in a stable state.
かくして、地震等により固定側Ｂに生じたあらゆる方
向の振動は、この防振装置により緩衝されて可動側Ｆへ
と軽減されたかたちで伝達されることになるのである。Thus, vibrations in all directions generated on the fixed side B due to an earthquake or the like are transmitted to the movable side F in a reduced form after being damped by the vibration isolator.
また、地震等の振動源が治まれば、固定側部材10にお
ける円錐状凹部13の斜面効果により、可動側部材20のス
チールボール23が当該円錐状凹部13の中心部分に向かっ
て転動しつつ復帰し、初期の静止状態に戻って次の地震
等の発生に備える。Further, when the vibration source such as an earthquake is settled, the steel ball 23 of the movable side member 20 rolls toward the central part of the conical recess 13 due to the slope effect of the conical recess 13 in the fixed side member 10. After returning, it returns to the initial stationary state and prepares for the next earthquake.
第２図は、この考案に係る防振装置の他の実施例を示
すものであって、その基本的な構成は前記した第１図の
実施例の場合と全く異ならず、単に、弾性支持部材30に
おける弾性機構の構成を異にするだけである。FIG. 2 shows another embodiment of the vibration isolator according to the present invention, the basic structure of which is the same as that of the embodiment of FIG. Only the configuration of the elastic mechanism in 30 is different.
すなわち、この第２図の実施例における弾性支持部材
30は、先に実施例の場合と同様に、可動側部材20におけ
る中央本体部21の上端外周に下端を取り付けた内筒31
と、当該内筒31を覆って上方から伸縮自在に被嵌した有
底状の外筒33とを有し、これら内外筒31,33が両者の間
に設けた軸受部材34を通して互いに摺動自在に摺接して
いる。That is, the elastic support member in the embodiment of FIG.
30 is an inner cylinder 31 in which the lower end is attached to the outer periphery of the upper end of the central main body portion 21 of the movable side member 20, as in the case of the above embodiment.
And a bottomed outer cylinder 33 that covers the inner cylinder 31 and is stretchably fitted from above, and these inner and outer cylinders 31 and 33 are slidable with respect to each other through a bearing member 34 provided between them. Is in sliding contact with.
そして、これら可動側部材20における中央本体部21の
上面と外筒33の上部下面との間に位置して弾性機構をか
たちづくるベロー式の空気ばね36を介装したのである。Then, a bellows type air spring 36, which is located between the upper surface of the central main body portion 21 of the movable side member 20 and the upper lower surface of the outer cylinder 33 and forms an elastic mechanism, is interposed.
したがって、この第２図の弾性支持部材30もまた、地
震等の発生により固定側Ｂに生じた振動中の上下方向振
動に対し、内外筒31,33と両者の間に設けた軸受部材34
とで可動側Ｆの偏芯した縦揺れを阻止しつつ、空気ばね
36のばね作用で当該振動の可動側Ｆへの伝達を安定した
状態で軽減する。Therefore, the elastic support member 30 shown in FIG. 2 is also provided with a bearing member 34 provided between the inner and outer cylinders 31 and 33 against vertical vibration during vibration generated on the fixed side B due to occurrence of an earthquake or the like.
While preventing the eccentric pitching of the movable side F with
The spring action of 36 reduces the transmission of the vibration to the movable side F in a stable state.
また、第３図は、この考案に係る防振装置のさらに他
の実施例を示すものであって、その基本的な構成は前記
した第１図および第２図の何れの実施例の場合とも全く
異ならず、単に弾性支持部材30における弾性機構の構成
のみを異にするだけである。FIG. 3 shows still another embodiment of the vibration isolator according to the present invention, the basic construction of which is the same as that of any of the embodiments of FIG. 1 and FIG. There is no difference, and only the structure of the elastic mechanism in the elastic support member 30 is different.
すなわち、この第３図の実施例における弾性支持部材
30は、先の何れの実施例の場合とも同様に、可動側部材
20における中央本体部21の上端外周に下端を取り付けた
内筒31と、当該内筒31を覆って上方から伸縮自在に被嵌
した有底状の外筒33とを有し、これら内外筒31,33が両
者の間に設けた軸受部材34を通して互いに摺動自在に摺
接している。That is, the elastic support member in the embodiment of FIG.
30 is a movable member, as in any of the previous embodiments.
An inner cylinder 31 having a lower end attached to the outer periphery of the upper end of the central main body portion 21 of 20 and an outer cylinder 33 having a bottom shape which covers the inner cylinder 31 and is elastically fitted from above are provided. , 33 are slidably slidably in contact with each other through a bearing member 34 provided between the two.
そして、これら可動側部材20における中央本体部21の
上面と外筒33の上部下面との間に位置して弾性機構をか
たちづくるコイルスプリング37を介装したのである。A coil spring 37, which is located between the upper surface of the central body 21 of the movable member 20 and the upper lower surface of the outer cylinder 33 and forms an elastic mechanism, is interposed.
したがって、この第３図の弾性支持部材30もまた、先
の第１図および第２図の実施例の場合と同様に、地震等
の発生により固定側Ｂに生じた振動中の上下方向振動に
対し、内外筒31,33と両者の間に設けた軸受部材34とで
可動側Ｆの偏芯した縦揺れを阻止しつつ、コイルスプリ
ング37のばね作用で当該振動の可動側Ｆへの伝達を安定
した状態で軽減することになる。Therefore, the elastic support member 30 of FIG. 3 is also subject to vertical vibration during vibration generated on the fixed side B due to occurrence of an earthquake or the like, as in the case of the embodiment of FIGS. 1 and 2 above. On the other hand, the inner and outer cylinders 31, 33 and the bearing member 34 provided between the inner and outer cylinders 33 prevent the eccentric pitching of the movable side F, and the spring action of the coil spring 37 transmits the vibration to the movable side F. It will be reduced in a stable state.
なお、これまで述べた各実施例の説明に際しては、主
としてこの考案の防振装置を建物の免震マウントとして
使用した場合について述べてきたが、これに代えて、例
えば、精密機械類の防振マウントや振動発生源である往
復動機器等からの振動伝播防止用マウントとしても使用
し得ることは勿論であり、この場合にあっても、単に振
動源が固定側Ｂから可動側Ｆに変わるだけでその作用は
前記したところと異なることはなく、したがって、その
説明は省略する。In the description of each of the embodiments described above, the case where the vibration isolator of the present invention is used as a seismic isolation mount for a building has been mainly described, but instead of this, for example, vibration isolation of precision machinery is performed. Of course, it can be used as a mount or a mount for preventing vibration from a reciprocating device which is a vibration source, and even in this case, the vibration source simply changes from the fixed side B to the movable side F. The operation is the same as that described above, and therefore the description thereof is omitted.
以上述べたように、この考案の防振装置によれば、以
下に記すような効果を発揮し得る。As described above, according to the vibration isolator of this invention, the following effects can be exhibited.
可動側部材のスチールボールが載る固定側部材の底
部上面を外周に向って直線状の登り勾配となる円錐状凹
部として構成したので、固定側と可動側の水平方向への
相対変位発生時における復元力が、両者の相対変位の大
小即ち振幅の大小に関係なく何処の位置にあろうとも常
に円錐状凹部の傾斜角によって一義的に決まることにな
り、その結果、可動側に共振が生じて振幅が大きくなろ
うとするとその固有振動数が変化して可動側の振動に共
振が発生するのを未然に防止することができる。Since the upper surface of the bottom of the fixed member on which the steel ball of the movable member rests is configured as a conical recess that has a linear upward slope toward the outer circumference, it is restored when relative displacement between the fixed side and the movable side in the horizontal direction occurs. The force is always uniquely determined by the inclination angle of the conical recess regardless of the relative displacement between the two, that is, the amplitude, and as a result, resonance occurs on the movable side and the amplitude changes. It is possible to prevent the occurrence of resonance in the vibration on the movable side due to a change in the natural frequency of the vibration.
その結果、防振装置の設計に際して、振動系におけ
る可動側の固有振動数に全く考慮を払うことなく、所期
した減衰作用の下で効果的に防振し得る利点がある。As a result, when designing the vibration isolator, there is an advantage that effective vibration isolation can be performed under the intended damping action without paying attention to the natural frequency of the movable side of the vibration system.
さらに、上記に加えて、可動側部材上に上下方向へ
と向けて装着した上下方向の支持機構ある弾性支持部材
を、伸側に向かって付勢する弾性機構を内装した伸縮自
在の内外筒で構成し、かつ、これら内外筒の摺接面に軸
受部材を介装したことにより、可動側からの偏芯荷重を
当該軸受部材の摺接面で吸収しつつ弾性支持部材が同芯
状態を保って円滑に伸縮動作することになり、したがっ
て、固定側と可動側との間にはその軸線方向に沿う上下
動のみが許容されて両者間における上下動が所謂偏芯さ
れて招来される危惧がなく、常に安定した弾性支持機能
を発揮することができるい利点をも有する。Further, in addition to the above, an elastic support member having a vertical support mechanism mounted on the movable side member in the vertical direction is an expandable inner and outer cylinder having an elastic mechanism for urging it toward the extension side. Since the sliding contact surfaces of these inner and outer cylinders are provided with the bearing members, the eccentric load from the movable side is absorbed by the sliding contact surfaces of the bearing members, and the elastic support member maintains the concentric state. As a result, only the vertical movement along the axial direction between the fixed side and the movable side is allowed between the fixed side and the movable side, and the vertical movement between the two sides is so-called eccentric and there is a danger that it may be caused. In addition, there is an advantage that a stable elastic supporting function can always be exhibited.
また、以上のことが相俟って、固定側と可動側との
間に生じた小さな変位は勿論のこと大きな変位に対して
も、所期した減衰作用の下で常に安定してかつ効果的に
対処することが可能になるのである。In addition, due to the above facts, even for small displacements occurring between the fixed side and the movable side as well as large displacements, stable and effective under the intended damping action. Can be dealt with.
第１図は、この考案に係る防振装置の一実施例を示す縦
断正面図、第２図は、この考案の他の実施例を示す一部
縦断正面図、第３図は、この考案のさらに別の実施例を
示す一部縦断正面図である。 〔符号の説明〕 10…固定側部材、13…円錐状凹部、20…可動側部材 21…中央本体部、23…スチールボール、30…弾性支持部
材 31…内筒、32…弾性体、33…外筒 34…軸受部材、36…空気ばね、37…コイルスプリング Ａ…空気室、Ｂ…固定側、Ｆ…可動側FIG. 1 is a vertical sectional front view showing an embodiment of a vibration isolator according to the present invention, FIG. 2 is a partial vertical sectional front view showing another embodiment of the present invention, and FIG. It is a partial longitudinal front view which shows another Example. [Explanation of reference numerals] 10 ... Fixed side member, 13 ... Conical recessed part, 20 ... Movable side member 21 ... Central body part, 23 ... Steel ball, 30 ... Elastic support member 31 ... Inner cylinder, 32 ... Elastic body, 33 ... Outer cylinder 34 ... Bearing member, 36 ... Air spring, 37 ... Coil spring A ... Air chamber, B ... Fixed side, F ... Movable side
───────────────────────────────────────────────────── フロントページの続き (72)考案者 緑川 浩史 東京都調布市飛田給２丁目19番１号 鹿島 建設株式会社技術研究所内 (72)考案者 鎮目 武治 神奈川県相模原市麻溝台1805番地１ カヤ バ工業株式会社相模工場内 (56)参考文献 特開 昭54−134269（ＪＰ，Ａ) 特開 昭59−19734（ＪＰ，Ａ) 実開 昭57−12144（ＪＰ，Ｕ) 実開 昭52−2095（ＪＰ，Ｕ) 実公 昭46−21318（ＪＰ，Ｙ１) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroshi Midorikawa, Hiroshi Midorikawa, 2-19-1, Tobita, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Technical Research Institute (72) Inventor Takeji Kaji 1805, Asamizodai, Sagamihara, Kanagawa Sagami Plant Co., Ltd. (56) Reference JP 54-134269 (JP, A) JP 59-19734 (JP, A) Actually opened 57-12144 (JP, U) Actually opened 52-2095 ( JP, U) Actual public Sho 46-21318 (JP, Y1)
Claims (4)
側部材の上にスチールボールを介して水平方向へと移動
可能に載置した水平方向支持機構である可動側部材と、
この可動側部材の上に上下方向へと向けて伸縮可能に装
着した上下方向支持機構である弾性支持部材とを通して
可動側を支持するようにした防振装置において、固定側
部材の底部上面を中心部分から外周側へと向かって直線
状の登り勾配となる円錐状凹部として形成し、この円錐
状凹部の上に可動側部材を下部に設けたスチールボール
を介して転動自在に載置すると共に、弾性支持部材を伸
側へと向かって付勢する弾性機構を内装した伸縮自在の
内筒と外筒とで構成し、これら内外筒の対向面に軸受部
材を介装したことを特徴とする防振装置。1. A fixed side member installed on the fixed side, and a movable side member which is a horizontal direction support mechanism mounted on the fixed side member so as to be horizontally movable via steel balls,
In the vibration isolator configured to support the movable side through an elastic support member that is a vertical support mechanism that is mounted on the movable side member so as to be capable of expanding and contracting in the vertical direction, the bottom upper surface of the fixed side member is centered. It is formed as a conical recess having a linear upward slope from the portion toward the outer peripheral side, and the movable side member is rotatably mounted on this conical recess via a steel ball provided below. A flexible inner cylinder and an outer cylinder, each having an elastic mechanism for urging the elastic support member toward the extension side, and a bearing member interposed between the inner and outer cylinders facing each other. Anti-vibration device.
側部材における中央本体部と、当該中央本体部に連設し
た内筒と、この内筒の上端を塞ぐと共に外筒の底部に当
接する弾性体とで区画した空気室で構成されている実用
新案登録請求の範囲第１項記載の防振装置。2. An elastic mechanism installed in an elastic support member includes a central body portion of a movable member, an inner cylinder connected to the central body portion, an upper end of the inner cylinder, and a bottom portion of the outer cylinder. The anti-vibration device according to claim 1, wherein the anti-vibration device is composed of an air chamber that is partitioned by an elastic body that is in contact therewith.
側部材における中央本体部と外筒の底部との間に介装し
た空気ばねで構成されている実用新案登録請求の範囲第
１項記載の防振装置。3. A utility model registration claim according to claim 1, wherein the elastic mechanism installed in the elastic supporting member is constituted by an air spring interposed between the central main body portion of the movable side member and the bottom portion of the outer cylinder. Anti-vibration device described.
側部材における中央本体部と外筒の底部との間に介装し
たコイルスプリングで構成されている実用新案登録請求
の範囲第１項記載の防振装置。4. A utility model registration claim according to claim 1, wherein the elastic mechanism installed in the elastic support member is composed of a coil spring interposed between the central body of the movable side member and the bottom of the outer cylinder. Anti-vibration device described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987091843U JPH088364Y2 (en) | 1987-06-15 | 1987-06-15 | Anti-vibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987091843U JPH088364Y2 (en) | 1987-06-15 | 1987-06-15 | Anti-vibration device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63201236U JPS63201236U (en) | 1988-12-26 |
| JPH088364Y2 true JPH088364Y2 (en) | 1996-03-06 |
Family
ID=30952997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987091843U Expired - Lifetime JPH088364Y2 (en) | 1987-06-15 | 1987-06-15 | Anti-vibration device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH088364Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH061090B2 (en) * | 1987-12-02 | 1994-01-05 | 石川島播磨重工業株式会社 | Seismic isolation support device |
| JP2010002047A (en) * | 2008-06-23 | 2010-01-07 | Kanazawa Seisakusho:Kk | Support device for base isolation |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5422824Y2 (en) * | 1975-06-24 | 1979-08-08 | ||
| JPS54134269A (en) * | 1978-04-10 | 1979-10-18 | Mitsubishi Heavy Ind Ltd | Pedestal with vibration-proof device |
| JPS6131551Y2 (en) * | 1981-01-23 | 1986-09-13 | ||
| JPS5919734A (en) * | 1982-07-26 | 1984-02-01 | Audio Technica Corp | Vibration absorbing device |
-
1987
- 1987-06-15 JP JP1987091843U patent/JPH088364Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63201236U (en) | 1988-12-26 |
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