JPH07122982B2 - Anti-vibration rubber device - Google Patents
Anti-vibration rubber deviceInfo
- Publication number
- JPH07122982B2 JPH07122982B2 JP28852385A JP28852385A JPH07122982B2 JP H07122982 B2 JPH07122982 B2 JP H07122982B2 JP 28852385 A JP28852385 A JP 28852385A JP 28852385 A JP28852385 A JP 28852385A JP H07122982 B2 JPH07122982 B2 JP H07122982B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- vibration
- supported body
- natural frequency
- supported
- 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
- Vibration Prevention Devices (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は光学的記録再生装置等に用い外部からの振動を
遮断する防振ゴム装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration rubber device for use in an optical recording / reproducing device or the like to block external vibration.
従来の技術 従来の防振ゴム装置としては、防振ゴムのみで構成した
簡単なものから、コイルばねのみのもの、防振ゴムとコ
イルばねとを併用したものまで多種類ある。2. Description of the Related Art There are various types of conventional vibration-proof rubber devices, from a simple device made of only vibration-proof rubber to a device having only a coil spring, and a device using both a vibration-proof rubber and a coil spring.
発明が解決しようとする問題点 しかしながら、コイルばねのみで構成されたものは、コ
イルばねと被支持体とによる固有振動数を低く設定でき
るが共振値（共振の度合を表わす値）が高くなる（30〜
40dB）という欠点があった。また、防振ゴムのみで構成
されたものは、共振値は低いが（８〜12dB）防振ゴムと
被支持体とによる固有振動数を低く設定するためにはゴ
ム硬度を低くする必要があり、時間の経過とともに歪が
増大し固有振動数が高くなる方向に変化するという欠点
があった。このため、安定な固有振動数を得るために
は、コイルばねを主として防振ゴムを補助的に併用する
方法が行なわれているが共振値は防振ゴムのみの場合に
比べ高い（15〜20dB）ものとなっていた。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the case where only the coil spring is used, the natural frequency due to the coil spring and the supported body can be set low, but the resonance value (value indicating the degree of resonance) becomes high ( 30 ~
There was a drawback of 40 dB). Moreover, although the resonance value is low (8 to 12 dB) if it is composed only of the vibration-proof rubber, it is necessary to lower the rubber hardness in order to set the natural frequency of the vibration-proof rubber and the supported body to be low. However, there is a drawback that the strain increases with the passage of time and the natural frequency changes in the direction of increasing. For this reason, in order to obtain a stable natural frequency, a method is used in which a coil spring is mainly used in combination with an anti-vibration rubber, but the resonance value is higher than that of the anti-vibration rubber alone (15 to 20 dB). It was a thing.
本発明は、ゴム硬度の低い防振ゴムにおいても時間の経
過による固有振動数の変化を防止することができ、か
つ、防振ゴムのみで使用した場合とほぼ同様な共振値が
得られる防振ゴム装置を提供することを目的とする。INDUSTRIAL APPLICABILITY The present invention is a vibration proof that can prevent changes in natural frequency over time even with a vibration proof rubber having a low rubber hardness, and can obtain a resonance value that is substantially the same as when using only the vibration proof rubber. An object is to provide a rubber device.
問題点を解決するための手段 本発明は、被支持体に固定され、被支持体への振動を遮
断する防振ゴムと、防振ゴムを保持するゴム保持手段
と、ゴム保持手段と被支持体との間で挟持される金属ば
ねとを備え、金属ばねと前記被支持体とによる固有振動
数は、前記防振ゴムと前記被支持体とによる固有振動数
より小さく、金属ばねは、被支持体の重量に等しい反発
力で被支持体を支持し、静止時には前記被支持体の重量
が前記防振ゴムに作用しないようにしたことを特徴とす
る防振ゴム装置である。Means for Solving the Problems The present invention relates to a vibration-proof rubber that is fixed to a supported body and blocks vibrations to the supported body, a rubber holding means that holds the vibration-proof rubber, a rubber holding means and a supported body. A metal spring sandwiched between the body and a body, the natural frequency of the metal spring and the supported body is smaller than the natural frequency of the vibration-proof rubber and the supported body, and the metal spring is The anti-vibration rubber device is characterized in that the to-be-supported body is supported by a repulsive force equal to the weight of the support body, and the weight of the to-be-supported body does not act on the anti-vibration rubber when stationary.
作用 本発明は前記した構成により、静止時には、被支持体の
重量が金属ばねにより支持されるため、防振ゴムの時間
の経過による歪の増加を防止できる。また、振動時に
は、防振ゴムと被支持体とによる固有振動数より金属ば
ねと被支持体とによる固有振動数の方が低い、すなわ
ち、防振ゴムの動的ばね定数より金属ばねの動的ばね定
数の方が小さいため振動は防振ゴムに主として加えられ
る。Effect With the above-described structure of the present invention, since the weight of the supported body is supported by the metal spring when stationary, it is possible to prevent an increase in strain of the anti-vibration rubber due to the passage of time. Further, during vibration, the natural frequency of the metal spring and the supported body is lower than the natural frequency of the vibration isolating rubber and the supported body. Since the spring constant is smaller, vibration is mainly applied to the anti-vibration rubber.
実施例 図は本発明の一実施例における防振ゴム装置の断面図を
示すものである。図において、１は防振ゴムで略円筒状
の形をしている。防振ゴム１の中央部には取付けによる
防振ゴム１の変形を防止するカラー３を挿入してある。
防振ゴム１とカラー３はゴム押え４を介して固定ねじ５
により被支持体６に固定される。７はゴム保持金具であ
り、防振ゴム１の凹溝1aに係合し防振ゴム１を保持す
る。２はコイルばね（金属ばね）であり、被支持体６と
ゴム保持金具７との間の防振ゴム１の周囲に配設し被支
持体６を支える。Embodiment FIG. 1 is a sectional view of a vibration damping rubber device according to an embodiment of the present invention. In the figure, reference numeral 1 designates a vibration-proof rubber having a substantially cylindrical shape. A collar 3 is inserted in the center of the vibration-proof rubber 1 to prevent the vibration-proof rubber 1 from being deformed by mounting.
The anti-vibration rubber 1 and the collar 3 are fixed to the fixing screw 5 via the rubber retainer 4.
It is fixed to the supported body 6 by. Reference numeral 7 denotes a rubber holding metal fitting, which is engaged with the concave groove 1a of the vibration isolating rubber 1 to hold the vibration isolating rubber 1. Reference numeral 2 denotes a coil spring (metal spring), which is arranged around the vibration-proof rubber 1 between the supported body 6 and the rubber holding metal fitting 7 to support the supported body 6.
以上のように構成された本実施例の防振ゴム装置につい
て、以下その動作を説明する。コイルばね２の反発力は
被支持体６の重量と等しくしてあり、静止時には被支持
体６の重量が防振ゴム１には作用しない。防振ゴム１と
被支持体６とによる固有振動数よりコイルばね２と被支
持体６とによる固有振動数の方を低く設定してある。す
なわち、防振ゴム１の動的バネ定数よりコイルばね２の
動的バネ定数が小さいため、ゴム保持金具７に振動が加
えられた場合、加えられた振動は防振ゴム１に主として
作用し防振ゴム装置としての固有振動数及び共振値は防
振ゴム１と被支持体６とによる値とほぼ同一の値が得ら
れる。実施例では、被支持体６の重量を500gw、防振ゴ
ム１と被支持体６とによる固有振動数を30Hz・共振値8d
B,コイルばね２と被支持体６とによる固有振動数5Hz・
共振値30〜40dB,コイルばね２の反発力を500gfとした場
合の特性として、固有振動数28Hz・共振値8Hzという値
が得られた。また、70℃の温度条件下で500時間の放置
において固有振動数の変化はほとんどみられなかった。The operation of the anti-vibration rubber device of the present embodiment configured as described above will be described below. The repulsive force of the coil spring 2 is equal to the weight of the supported body 6, and the weight of the supported body 6 does not act on the antivibration rubber 1 at rest. The natural frequency of the coil spring 2 and the supported body 6 is set lower than the natural frequency of the anti-vibration rubber 1 and the supported body 6. That is, since the dynamic spring constant of the coil spring 2 is smaller than the dynamic spring constant of the anti-vibration rubber 1, when vibration is applied to the rubber holding fitting 7, the applied vibration mainly acts on the anti-vibration rubber 1 to prevent vibration. The natural frequency and the resonance value of the vibration rubber device are almost the same as those of the vibration damping rubber 1 and the supported body 6. In the embodiment, the weight of the supported body 6 is 500 gw, the natural frequency of the vibration-proof rubber 1 and the supported body 6 is 30 Hz, and the resonance value is 8 d.
B, natural frequency 5Hz due to coil spring 2 and supported body 6
When the resonance value is 30 to 40 dB and the repulsive force of the coil spring 2 is 500 gf, a characteristic frequency of 28 Hz and a resonance value of 8 Hz were obtained. In addition, there was almost no change in the natural frequency after standing for 500 hours at 70 ℃.
なお、本実施例においては金属ばねとしてコイルばねを
用いたが板ばねなどであってもよい。In this embodiment, a coil spring is used as the metal spring, but a leaf spring or the like may be used.
発明の効果 以上説明したように本発明によれば、防振ゴムのみで構
成した防振ゴム装置に比べ、ゴム硬度の低い防振ゴムを
使用することが可能となり、より低い固有振動数が得ら
れると同時に、時間の経過による固有振動数の変化を防
止できる。また、コイルばねを主として構成された防振
ゴム装置に比べ、共振値の値を低くすることが可能とな
り、その実用的効果は大きい。EFFECTS OF THE INVENTION As described above, according to the present invention, it becomes possible to use a vibration-proof rubber having a low rubber hardness as compared with a vibration-proof rubber device configured only with a vibration-proof rubber, and a lower natural frequency can be obtained. At the same time, it is possible to prevent a change in natural frequency over time. Further, the value of the resonance value can be made lower than that of the vibration damping rubber device mainly composed of the coil spring, and the practical effect thereof is great.
図は本発明の一実施例の防振ゴム装置の断面図であ。 １……防振ゴム、２……コイルばね、３……カラー、４
……ゴム押え、５……固定ねじ、６……被支持体、７…
…ゴム保持金具。FIG. 1 is a sectional view of a rubber vibration isolator according to an embodiment of the present invention. 1 ... Anti-vibration rubber, 2 ... Coil spring, 3 ... Color, 4
…… Rubber retainer, 5 …… Fixing screw, 6 …… Supported object, 7 ・ ・ ・
… Rubber holding metal fittings.
Claims (2)
遮断する防振ゴムと、防振ゴムを保持するゴム保持手段
と、前記ゴム保持手段と前記被支持体との間で挟持され
る金属ばねとを備え、前記金属ばねと前記被支持体とに
よる固有振動数は、前記防振ゴムと前記被支持体とによ
る固有振動数より小さく、金属ばねは、前記被支持体の
重量に等しい反発力で前記被支持体を支持し、静止時に
は前記被支持体の重量が前記防振ゴムに作用しないよう
にしたことを特徴とする防振ゴム装置。1. A vibration-damping rubber fixed to a supported body for blocking vibration to the supported body, rubber holding means for holding the vibration-proof rubber, and between the rubber holding means and the supported body. A metal spring sandwiched between the metal spring and the supported body, and a natural frequency of the metal spring and the supported body is lower than a natural frequency of the vibration-proof rubber and the supported body. An anti-vibration rubber device, wherein the supported body is supported by a repulsive force equal to the weight, and the weight of the supported body does not act on the anti-vibration rubber when stationary.
中央部外周に凹溝を有し、前記凹溝と係合するゴム保持
部材により保持され、前記防振ゴムの中空部に防振ゴム
と長さが略等しい円筒状のカラーが挿入され、一方の端
面が被支持体と接触している前記防振ゴムの他方の端面
をゴム押えで押えられ、前記金属ばねは前記ゴム保持部
材と被支持体との間もしくは前記ゴム保持部材と前記ゴ
ム押えとの間のいづれか一方に配置されるコイルばねで
構成されたことを特徴とする特許請求の範囲第１項記載
の防振ゴム装置。2. An anti-vibration rubber is cylindrical and hollow, has a concave groove on the outer periphery of the central portion in the longitudinal direction, and is held by a rubber holding member that engages with the concave groove. A cylindrical collar having substantially the same length as the anti-vibration rubber is inserted in, and the other end face of the anti-vibration rubber whose one end face is in contact with the supported body is pressed by a rubber presser, and the metal spring is The protection according to claim 1, characterized in that it is constituted by a coil spring which is arranged either between the rubber holding member and the supported body or between the rubber holding member and the rubber retainer. Vibration rubber device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28852385A JPH07122982B2 (en) | 1985-12-20 | 1985-12-20 | Anti-vibration rubber device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28852385A JPH07122982B2 (en) | 1985-12-20 | 1985-12-20 | Anti-vibration rubber device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62146478A JPS62146478A (en) | 1987-06-30 |
| JPH07122982B2 true JPH07122982B2 (en) | 1995-12-25 |
Family
ID=17731337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28852385A Expired - Lifetime JPH07122982B2 (en) | 1985-12-20 | 1985-12-20 | Anti-vibration rubber device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07122982B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100285145B1 (en) * | 1992-05-22 | 2001-03-15 | 이데이 노부유끼 | Disc cartridge loading device |
| MY123588A (en) * | 1993-08-26 | 2006-05-31 | Sony Corp | Recording and / or reproducing apparatus for recording medium and damper mechanism employed in such apparatus. |
| MY115952A (en) * | 1994-04-25 | 2003-10-31 | Sony Corp | Cd/cd-rom apparatus |
| JP2586332B2 (en) * | 1994-05-31 | 1997-02-26 | 日本電気株式会社 | Floppy disk drive |
| WO2014203367A1 (en) * | 2013-06-20 | 2014-12-24 | 日立機材株式会社 | Seismic isolation floor structure |
-
1985
- 1985-12-20 JP JP28852385A patent/JPH07122982B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62146478A (en) | 1987-06-30 |
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