JP2005207589A - Damping coil spring and vibration damping device - Google Patents

Damping coil spring and vibration damping device Download PDF

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JP2005207589A
JP2005207589A JP2004382845A JP2004382845A JP2005207589A JP 2005207589 A JP2005207589 A JP 2005207589A JP 2004382845 A JP2004382845 A JP 2004382845A JP 2004382845 A JP2004382845 A JP 2004382845A JP 2005207589 A JP2005207589 A JP 2005207589A
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coil spring
damping
viscoelastic
sheet
vibration
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JP4948763B2 (en
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Eiichi Kakisako
栄一 柿迫
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SAIRENSU KK
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain a reliable product satisfying necessary performance even when a supported object is lighter by actualizing higher versatile and simpler construction for imparting damping force to a coil spring while basically forming a vibration damper with the coil spring and a viscoelastic material. <P>SOLUTION: This damping coil spring 1 comprises the compression coil spring 2 and a viscoelastic sheet 3 to be bent and deformed between both coils with the expansion and deformation of the compression coil spring 2. With vibrating insulation by the compression coil spring 2 and the damping force of the viscoelastic sheet 3, the free vibration of the compression coil spring 2 is quickly damped and the natural frequency and resonance factor of a vibration system are both reduced. Thus, a general coil spring can be converted into the coil spring having improved damping force. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は、振動対策用のコイルばねを、減衰力を有するコイルばねに転換する技術、及びその減衰力を有するコイルばねを用いる振動減衰装置に関する。  The present invention relates to a technology for converting a coil spring for vibration countermeasures into a coil spring having a damping force, and a vibration damping device using the coil spring having the damping force.

振動対策として多くの各種コイルばねが使用されている。しかしながら、共振周波数を低く抑えるべくばね定数を低く設定した場合を想定すれば明らかなように、コイルばねそれ自体は極めて減衰力に乏しく、その自由振動を抑えることができないという問題がある。したがって、防振用途として、コイルばね単体で使用されることは少なく、自由振動を抑えるためのダンパー機構をコイルばねと並列に設けるのが通例である。  Many various coil springs are used as a countermeasure against vibration. However, as is apparent from the assumption that the spring constant is set low in order to keep the resonance frequency low, there is a problem that the coil spring itself has very little damping force and its free vibration cannot be suppressed. Therefore, a coil spring alone is rarely used as a vibration proofing application, and a damper mechanism for suppressing free vibration is usually provided in parallel with the coil spring.

このように、ダンパー機構をコイルばねと並列に設ける場合に用いられるダンパー機構としては、これまで例えば、液体の粘性を利用したオイルダンパー、摩擦ダンパー、鉛や鋼など金属の降伏を利用したヒステリシスダンパーなどがある。しかしながら、装置構造が必然的に複雑なものとなり、しかもコスト的にも不利になってしまう、という難点がある。  As described above, as a damper mechanism used when the damper mechanism is provided in parallel with the coil spring, for example, an oil damper using a viscosity of a liquid, a friction damper, and a hysteresis damper using a yield of a metal such as lead or steel. and so on. However, there is a drawback that the structure of the apparatus is inevitably complicated and disadvantageous in terms of cost.

この難点を解消すべく本発明者は、特許第３４６５７１４号の特許発明に係る振動エネルギー吸収装置を提案している。この装置の構成の概略は、振動伝達経路の１次側と２次側の何れか一方に筒状周壁を有する第１カバー体を、前記何れか他方に筒状周壁を有する第２カバー体を、双方の筒状周壁を内外で重ね合わせた状態で対向配置したものであり、且つ、第１、第２カバー体は筒状周壁どうしをテープ状の粘弾性体で接合され、第２カバー体の内部にはコイルススプリングを備えるものとして構成されている。したがって、この装置では、コイルスプリングの圧縮変形により振動エネルギーの伝達を絶縁するとともに、コイルスプリングの自由振動を、テープ状の粘弾性体の剪断変形によって減衰させるものとして機能する。
特許第３４６５７１４号公報（図１３） In order to eliminate this difficulty, the present inventor has proposed a vibration energy absorbing device according to the patent invention of Japanese Patent No. 3465714. The outline of the configuration of this device is that a first cover body having a cylindrical peripheral wall on either the primary side or the secondary side of the vibration transmission path is provided, and a second cover body having a cylindrical peripheral wall on the other side. Both cylindrical peripheral walls are arranged opposite to each other in a state where they are overlapped inside and outside, and the first and second cover bodies are joined together by a tape-like viscoelastic body between the cylindrical peripheral walls. Is configured to have a coil spring. Therefore, this device functions to insulate the transmission of vibration energy by compressive deformation of the coil spring and to attenuate free vibration of the coil spring by shear deformation of the tape-like viscoelastic body.
Japanese Patent No. 3465714 (FIG. 13)

上記の振動エネルギー吸収装置によれば、優れた防振効果を発揮できることは勿論のこと、コイルばねとコイルばねの自由振動を抑えるダンパー機構を、簡易な構造で同一機器内で一体に備えるものであるため、装置構造の簡易性という点でも優れたものである。しかしながら、この装置構造の簡易性を、さらに簡易な構成とすることができればより一層好ましい。すなわち、上記振動エネルギー吸収装置は、基本的にそれ自体が独立した“装置”である。このため、例えば機器の内部でそれ自体を機械部品として組み込んで使用することには無理があり、使用範囲が、あくまで機器の付属物としての用途に限定されてしまう、という問題がある。  According to the above vibration energy absorbing device, not only can an excellent anti-vibration effect be exhibited, but also a damper mechanism that suppresses free vibration of the coil spring and the coil spring is integrally provided in the same device with a simple structure. Therefore, it is excellent in terms of simplicity of the device structure. However, it is even more preferable if the simplicity of the device structure can be further simplified. That is, the vibration energy absorbing device is basically an “device” that is independent of itself. For this reason, for example, there is a problem that it is impossible to incorporate and use it as a machine part inside the device, and the range of use is limited to the use as an accessory of the device.

また、コイルばねのダンパー機構として粘弾性体を備える振動減衰装置（防・除振器）では、シート状の粘弾性体を剪断で使用したり（上記特許文献１を参照。）、柱状の粘弾性体を引張り・圧縮で使用したりする（一例として本出願人による特願２００３−１５９６１３号を参照。）のが一般的である。ところが、振動減衰装置の被支持体の質量が小さくなればなるほど、前者においてはシート状の粘弾性体の面積を小さくしたり厚さを厚くしなければならない。また後者においては柱状の粘弾性体の面積を小さくしたり高さを高くしなければならない。したがって、被支持体の質量が小さくなればなるほど、組立時の作業性や剪断や引張り・圧縮として機能させるための安定性に難点が出てくるため、実際に製品としての実現可能性が殆ど無く、軽量対象物への対応に限界がある。  Further, in a vibration damping device (anti-vibration / vibration isolator) provided with a viscoelastic body as a damper mechanism of a coil spring, a sheet-like viscoelastic body is used by shearing (see Patent Document 1 above) or a columnar viscoelastic body. In general, an elastic body is used in tension and compression (see, for example, Japanese Patent Application No. 2003-159613 by the present applicant). However, the smaller the mass of the supported body of the vibration damping device, the smaller the area of the sheet-like viscoelastic body or the greater the thickness in the former. In the latter case, the area of the columnar viscoelastic body must be reduced or the height must be increased. Therefore, the smaller the mass of the supported body, the more difficult it will be for workability during assembly and stability for functioning as shear, tension, and compression. There is a limit to the response to lightweight objects.

すなわち、振動減衰装置（防・除振器）の性能を追求するには、固有振動数を低く設定することが基本である。つまり、コイルばねと粘弾性体でなる振動減衰装置においては、固有振動数の一般式（ｆｎ＝１／２π・√（ｋ／Ｍ））に含まれるばね定数ｋを、粘弾性体の動的ばね定数（ｋｖ′）とコイルばねのばね定数（ｋｃ）との和として置いて、質量（Ｍ）に対してばね定数（ｋ＝ｋｖ′＋ｋｃ）を小さくすれば良いことになる。そして、シート状の粘弾性体を剪断で使用する場合における粘弾性体の動的ばね定数（ｋｖ′）は、粘弾性体の面積（Ａｓ）、粘弾性体の厚み（ｔ）、粘弾性体の貯蔵剪断弾性率（Ｇ′）から、〔ｋｖ′＝（Ａｓ・Ｇ′）／ｔ〕によって求めることができる。他方、断面積一定の柱状の粘弾性体を引張り・圧縮で使用する場合における粘弾性体の動的ばね定数（ｋｖ′）は、柱状の粘弾性体の断面積（Ａｔ）、柱状の粘弾性体の軸心方向に沿う長さ（ｈ）、柱状の粘弾性体の貯蔵縦弾性率（Ｅ′）から、〔ｋｖ′＝（Ａｔ・Ｅ′）／ｈ〕によって求めることができる。That is, in order to pursue the performance of the vibration damping device (anti-vibration / vibration isolator), it is fundamental to set the natural frequency low. In other words, in a vibration damping device composed of a coil spring and a viscoelastic body, the spring constant k included in the general formula (f n = 1 / 2π · √ (k / M)) of the natural frequency is set as the motion of the viscoelastic body. The spring constant (k = k v ′ + k c ) should be reduced with respect to the mass (M) by setting the sum of the spring constant (k v ′) and the spring constant (k c ) of the coil spring. Become. When the sheet-like viscoelastic body is used for shearing, the dynamic spring constant (k v ′) of the viscoelastic body is the area (A s ) of the viscoelastic body, the thickness (t) of the viscoelastic body, the viscoelastic body. From the storage shear modulus (G ′) of the elastic body, it can be obtained by [k v ′ = (A s · G ′) / t]. On the other hand, when a columnar viscoelastic body having a constant cross-sectional area is used for tension and compression, the dynamic spring constant (k v ′) of the viscoelastic body is equal to the cross-sectional area (A t ) of the columnar viscoelastic body. From the length (h) along the axial center direction of the viscoelastic body and the storage longitudinal elastic modulus (E ′) of the columnar viscoelastic body, it can be obtained by [k v ′ = (A t · E ′) / h]. it can.

したがって、それらの２つの式によれば、シート状の粘弾性体を剪断で使用する振動減衰装置（防・除振器）で粘弾性体の動的ばね定数（ｋｖ′）を小さくするには、第１に、粘弾性体の面積（Ａｓ）を小さくすることが考えられるが、これが１００ｍｍ２より小さくなってしまうと、粘弾性体の加工性、組立作業性が悪くなり、また粘弾性体の剥離も起こりやすくなるため品質保持が困難である。第２に、粘弾性体の厚み（ｔ）を大きくすることが考えられるが、面積との対比バランスが崩れてしまい剪断による減衰特性を発揮することが期待し難くなってしまい、またシート状の粘弾性体が自重によってクリープ変形を起こす虞も高くなる。つまり、シート状の粘弾性体を剪断で使用する振動減衰装置（防・除振器）で、現に製品として実現し得るのは、振動系の固有振動数２Ｈｚ、共振倍率２倍の性能を基準とした場合、被支持体の質量（Ｍ）として最低でも約１２ｋｇのものを想定しなければならないのが実際である。Therefore, according to these two equations, the dynamic spring constant (k v ′) of the viscoelastic body is reduced by a vibration damping device (anti-vibration / vibration isolator) that uses the sheet-like viscoelastic body by shearing. First, it is conceivable to reduce the area (A s ) of the viscoelastic body, but if this is smaller than 100 mm 2 , the workability and assembly workability of the viscoelastic body will be deteriorated, and It is difficult to maintain the quality because the elastic body is easily peeled off. Secondly, it is conceivable to increase the thickness (t) of the viscoelastic body, but the balance with the area is lost, and it is difficult to expect the damping characteristics due to shearing. There is also a high risk that the viscoelastic body will undergo creep deformation due to its own weight. In other words, a vibration damping device (anti-vibration / vibration isolator) that uses a sheet-like viscoelastic material by shearing can actually be realized as a product based on the performance of the natural frequency of the vibration system of 2 Hz and the resonance magnification of 2 times. In such a case, the mass (M) of the supported body must be assumed to be at least about 12 kg.

また、柱状の粘弾性体を引張り・圧縮で使用する振動減衰装置（防・除振器）で粘弾性体の動的ばね定数（ｋｖ′）を小さくするには、第１に、断面積（Ａｔ）を小さくすることが考えられるが、この場合も１００ｍｍ２より小さくなってしまうと、柱状の粘弾性体が細くなりすぎて、粘弾性体の加工性、組立作業性が悪くなり、また粘弾性体の剥離も起こりやすくなるため品質保持が困難である。第２に、柱状の粘弾性体の軸心方向に沿う長さ（ｌ）を長くすることが考えられるが、例えば圧縮によって座屈を起こす虞がとても高くなり、性能に信頼性のある製品を実現するのが極めて困難である。つまり、柱状の粘弾性体を引張り・圧縮で使用する振動減衰装置（防・除振器）で、現に製品として実現し得るのは、振動系の固有振動数２Ｈｚ、共振倍率２倍の性能を基準とした場合、被支持体の質量（Ｍ）として最低でも約３ｋｇのものを想定しなければならないのが実際である。In order to reduce the dynamic spring constant (k v ′) of a viscoelastic body with a vibration damping device (anti-vibration isolator) that uses a columnar viscoelastic body for tension and compression, first, the cross-sectional area It is conceivable to reduce (A t ), but in this case as well, if it becomes smaller than 100 mm 2 , the columnar viscoelastic body becomes too thin, and the workability and assembly workability of the viscoelastic body deteriorate, In addition, it is difficult to maintain the quality because the viscoelastic body is easily peeled off. Secondly, the length (l) along the axial direction of the columnar viscoelastic body can be increased. For example, the possibility of buckling due to compression is very high, and a product with reliable performance is required. It is extremely difficult to realize. In other words, a vibration damping device (anti-vibration / vibration isolator) that uses a columnar viscoelastic body for tension / compression can actually be realized as a product with a natural frequency of 2 Hz and a resonance magnification of 2 times. When the standard is used, the mass (M) of the supported body must be assumed to be at least about 3 kg.

以上のように、これまでのような、シート状の粘弾性体を剪断で使用するコンセプトの振動減衰装置（防・除振器）や、柱状の粘弾性体を引張り・圧縮で使用するコンセプトの振動減衰装置（防・除振器）によっては、例えば３ｋｇよりもさらに軽量の被支持体（軽量対象物）に対しても、必要な性能を満たしつつ、製品として実現可能性のある振動減衰装置（防・除振器）を得ることは事実上不可能である。  As described above, the conventional vibration damping device (anti-vibration / vibration isolator) that uses a sheet-like viscoelastic body for shearing, and the concept that uses a columnar viscoelastic body for tension / compression. Depending on the vibration damping device (anti-vibration / vibration isolator), for example, a vibration damping device that can be realized as a product while satisfying the required performance even for a lighter support (light weight object) than 3 kg. It is virtually impossible to obtain (anti-vibration isolator).

以上のような従来技術を背景になされたのが本発明である。その目的は、コイルばねと粘弾性体を備える振動減衰体を基本としながらも、コイルばねに減衰力を付与する構成を、汎用性が高くより一層簡易な構成で実現することにある。また、本発明の目的は、コイルばねと粘弾性体を備える振動減衰体を基本としながらも、被支持体が軽量であっても、必要な性能を充足し、かつ信頼性ある製品として実現できるようにすることにある。  The present invention has been made against the background of the prior art as described above. The purpose is to realize a configuration for applying a damping force to the coil spring with a more versatile and simpler configuration while being based on a vibration damping body including a coil spring and a viscoelastic body. Further, the object of the present invention is based on a vibration damping body including a coil spring and a viscoelastic body, and can be realized as a reliable product satisfying necessary performance even if the supported body is lightweight. There is in doing so.

上記目的を達成すべく本発明は、以下のようなダンピングコイルばね及び振動減衰装置として構成される。  In order to achieve the above object, the present invention is configured as the following damping coil spring and vibration damping device.

すなわち、請求項１記載の発明は、コイルばねの外周か内周の少なくとも何れかに粘弾性シートを周着してなるダンピングコイルばね、として構成した。  That is, the invention described in claim 1 is configured as a damping coil spring in which a viscoelastic sheet is circumferentially attached to at least one of the outer periphery and the inner periphery of the coil spring.

請求項２記載の発明は、コイルばねと、コイルばねの伸縮変形とともにコイルどうしの間で折れ曲がり変形する粘弾性シートと、を備えるダンピングコイルばね、として構成した。  The invention according to claim 2 is configured as a damping coil spring including a coil spring and a viscoelastic sheet that bends and deforms between the coils as the coil spring expands and contracts.

請求項３記載の発明は、粘弾性シートをコイルどうしの隙間に入り込ませるようにコイルばねに周着したものである。  The invention described in claim 3 is one in which a viscoelastic sheet is attached to a coil spring so as to enter a gap between the coils.

請求項４記載の発明は、一方面をコイルばねに周着した粘弾性シートの他方面に、粘弾性シートの保護シートを周着したものである。  In the invention according to claim 4, a protective sheet for the viscoelastic sheet is circumferentially attached to the other surface of the viscoelastic sheet whose one surface is circumferentially attached to the coil spring.

請求項５記載の発明は、コイルどうしの間に架け渡した粘弾性シートの外面部分に、コイルばねの伸縮による粘弾性シートの外側への膨出を押さえる規制手段を設けたものである。  According to the fifth aspect of the present invention, there is provided a restricting means for suppressing the outward expansion of the viscoelastic sheet due to the expansion and contraction of the coil spring on the outer surface portion of the viscoelastic sheet that is stretched between the coils.

請求項６記載の発明は、粘弾性シートを暖める発熱体を備えるものである。  The invention described in claim 6 includes a heating element for warming the viscoelastic sheet.

請求項７記載の発明は、コイルばねが、圧縮コイルばね、引っ張りコイルばね、ねじりコイルばねの何れかとしたものである。  According to a seventh aspect of the present invention, the coil spring is any one of a compression coil spring, a tension coil spring, and a torsion coil spring.

請求項８記載の発明は、請求項１〜請求項６何れか１項記載のダンピングコイルばねを備える振動減衰装置としたものである。  The invention according to claim 8 is a vibration damping device including the damping coil spring according to any one of claims 1 to 6.

以上の本発明の作用は、次のとおりである。  The operation of the present invention as described above is as follows.

請求項１記載の本発明は、コイルばねの外周か内周の少なくとも何れかに、粘弾性シートを周着したダンピングコイルばねである。また、請求項２記載の本発明は、コイルばねと、コイルばねの伸縮変形とともにコイルどうしの間で折れ曲がり変形する粘弾性シートと、を備えるダンピングコイルばねである。これらの本発明は、前述した従来の振動減衰装置と同様に、コイルばねと粘弾性シートとを含む点では共通するが、その構成は極めてシンプルである。したがって、振動対策用の機械部品として各種機器に組み込んで使用されるコイルばねと同様に、機械部品としての取扱いが可能である。よって、従来ではコイルばね以外にダンパーを別体として他の場所に併設せざるを得なかった振動対策を、本発明であれば、ダンパーの併設が不要で、ダンピングコイルばね単体で実現することができる。  The present invention according to claim 1 is a damping coil spring in which a viscoelastic sheet is circumferentially attached to at least one of an outer periphery and an inner periphery of the coil spring. Moreover, this invention of Claim 2 is a damping coil spring provided with a coil spring and the viscoelastic sheet | seat which bends and deform | transforms between coils with the expansion-contraction deformation of a coil spring. Although these present inventions are common in that they include a coil spring and a viscoelastic sheet, like the conventional vibration damping device described above, the configuration is extremely simple. Therefore, it can be handled as a machine part in the same manner as a coil spring that is incorporated and used as a machine part for vibration countermeasures in various devices. Therefore, according to the present invention, it is possible to realize a countermeasure against vibration, which conventionally had to be provided separately from the coil spring in another place other than the coil spring, and the damper coil spring alone can be realized with the present invention. it can.

また、上記本発明のダンピングコイルばねは、コイルばねと粘弾性シートを備える従来の振動減衰装置（防・除振器）のように、コイルばねの伸縮変形に伴う剪断だけで使用したり、引張り・圧縮だけで使用したり、あるいはこれらの複合的な動作で使用するものではない。すなわち、コイルばねの伸縮変形とともにコイルどうしの間で折れ曲がり変形するように動作する。この折れ曲がり変形によって粘弾性シートの動的ばね定数（ｋｖ′）を低減することができるため、従来例のような粘弾性体の（断）面積の極小化や、厚みや長さの増長を抑制することができ、組立作業性や加工性が容易となり、また剥離現象の危惧が無く、安定した減衰特性の確保が容易となる。そして、剪断、引張り・圧縮、折れ曲がりの変形要素が複合的に作用することで、被支持体の質量が５００ｇ（下限値）の軽量対象物であっても、振動系の固有振動数の下限値が２Ｈｚ〜３Ｈｚで、共振倍率が２倍以下となる優れた防・除振性能を発揮することができるものである。したがって、本発明のダンピングコイルばねであれば、コイルばねによる振動絶縁と粘弾性シートの減衰力とによって、コイルばねの自由振動を速く減衰させるとともに、振動系の固有振動数と共振倍率を何れも低くすることが可能であり、通常のコイルばねを優れた減衰力を有するコイルばねに転換することができる。Moreover, the above-described damping coil spring of the present invention can be used only by shearing due to expansion / contraction deformation of the coil spring, as in a conventional vibration damping device (anti-vibration / vibration isolator) including a coil spring and a viscoelastic sheet, or by tension.・ It is not used only for compression, or for these combined operations. That is, it operates to bend and deform between the coils as the coil spring expands and contracts. This bending deformation can reduce the dynamic spring constant (k v ′) of the viscoelastic sheet, thereby minimizing the (cut) area and increasing the thickness and length of the viscoelastic body as in the conventional example. As a result, the assembly workability and workability become easy, and there is no fear of the peeling phenomenon, and it is easy to secure stable damping characteristics. In addition, since the deformation elements of shear, tension / compression, and bending are combined, the lower limit value of the natural frequency of the vibration system, even if the weight of the supported body is 500 g (lower limit value). Is 2 Hz to 3 Hz, and can exhibit excellent anti-vibration and vibration isolation performance with a resonance magnification of 2 times or less. Therefore, with the damping coil spring of the present invention, the free vibration of the coil spring is quickly attenuated by the vibration insulation by the coil spring and the damping force of the viscoelastic sheet, and the natural frequency and resonance magnification of the vibration system are both reduced. The normal coil spring can be converted into a coil spring having excellent damping force.

さらに、粘弾性シートをコイルばねに周着する本発明では、コイルばねの設計時には想定していなかったサージングやバックリングを起こさせるような偏荷重が加わった場合に、それを補助的に抑える一助として、粘弾性シートを機能させることが可能である。  Further, in the present invention in which the viscoelastic sheet is attached to the coil spring, when an unbalanced load that causes surging or buckling, which was not assumed at the time of designing the coil spring, is applied, this is supplementarily suppressed. As a result, it is possible to make the viscoelastic sheet function.

そして、本発明のダンピングコイルばねであれば、振動減衰特性の変更・調整が極めて容易である、という大きな利点がある。すなわち、本発明のダンピングコイルばねは、コイルばねに粘弾性シートを周着してなる構成であるから、ばね要素（コイルスプリング）と減衰要素（粘弾性シート）とのバランス調整が、自由であり容易である。つまり、本発明のダンピングコイルばねでは、粘弾性シートの質量、つまり厚みや面積を変更する際に、それを制約する他の構造要素が存在しない。特に、コイルばねのコイルの線径よりも薄肉の粘弾性シートを使用することができる。したがって、粘弾性シートの厚みや面積（コイルばねに周着する面積）の選択が自由であり、その自由な選択によって、振動減衰性能の設計変更の自由度も拡大されるため、振動減衰特性の変更・調整が自由且つ容易に行える。この結果、本発明のダンピングコイルばねを用いれば、様々な機器の防振部品として、その取付箇所の防振系の振動特性に容易に適合させるように設計することが可能である。そして、以上のような粘弾性シートは、例えば、一枚物をコイルばねの内周または外周の全周に取付けたり、あるいは複数枚に分割してコイルばねの内周または外周に周方向で部分的に設けることができる。また、厚みが均一の粘弾性シートを用いたり、あるいは部分的に複数枚の粘弾性シートを積層させて部分的に厚み差があるように取付けることも可能である。  And if it is a damping coil spring of this invention, there exists a big advantage that a change and adjustment of a vibration damping characteristic are very easy. That is, since the damping coil spring of the present invention has a configuration in which a viscoelastic sheet is attached to the coil spring, balance adjustment between the spring element (coil spring) and the damping element (viscoelastic sheet) is free. Easy. That is, in the damping coil spring of the present invention, there is no other structural element that restricts the mass of the viscoelastic sheet, that is, when the thickness or area is changed. In particular, a viscoelastic sheet that is thinner than the coil wire diameter of the coil spring can be used. Therefore, the thickness and area of the viscoelastic sheet (the area surrounding the coil spring) can be freely selected, and the freedom to change the design of the vibration damping performance can be expanded. Changes and adjustments can be made freely and easily. As a result, if the damping coil spring of the present invention is used, it can be designed as an anti-vibration component for various devices so as to easily adapt to the vibration characteristics of the anti-vibration system at the mounting location. The viscoelastic sheet as described above is, for example, attached to the entire inner circumference or outer circumference of the coil spring, or divided into a plurality of parts and arranged in the circumferential direction on the inner circumference or outer circumference of the coil spring. Can be provided. It is also possible to use a viscoelastic sheet having a uniform thickness or to laminate a plurality of viscoelastic sheets partially so that there is a partial thickness difference.

さらに、本発明のダンピングコイルばねは、生産面でのメリットも大きい。つまり、コイルばねに粘弾性シートを周着させるだけであるため、多種多様なコイルばねについてロット数の多少に拘わらず自在に対処することができる。  Furthermore, the damping coil spring of the present invention has a great merit in production. In other words, since only the viscoelastic sheet is attached to the coil spring, a wide variety of coil springs can be dealt with freely regardless of the number of lots.

こうした粘弾性シートのコイルばねに対する周着は、粘弾性シートが自己粘着力を有するものである場合には、それを利用してコイルばねに対し周着することができる。また、粘弾性シートが自己粘着力を有しない場合には、粘着テープなどを使用しての周着が可能である。もちろん、これらの何れの取付方法を選択する場合であっても、例えばコイルばねや粘弾性シートに固着性を高めるプライマー処理などの前処理を行ってもよい。  When the viscoelastic sheet has a self-adhesive force, the viscoelastic sheet can be circumferentially attached to the coil spring by using the viscoelastic sheet. In addition, when the viscoelastic sheet does not have self-adhesive strength, it can be attached using an adhesive tape or the like. Of course, even when any of these attachment methods is selected, for example, a pretreatment such as a primer treatment for improving the adhesion to a coil spring or a viscoelastic sheet may be performed.

請求項３記載の本発明は、前記ダンピングコイルばねについて、粘弾性シートをコイルどうしの隙間に入り込むように圧着したので、コイルばねのコイル間の隙間に粘弾性シートが入り込んで固着面積が増大させることが可能であり、粘弾性シートの固着による一体性を強固にできる。  According to the third aspect of the present invention, since the viscoelastic sheet is pressure-bonded so as to enter the gap between the coils of the damping coil spring, the viscoelastic sheet enters the gap between the coils of the coil spring to increase the fixing area. It is possible to strengthen the integrity by fixing the viscoelastic sheet.

請求項４記載の本発明は、前記ダンピングコイルばねについて、一方面をコイルばねに周着した粘弾性シートの他方面に、粘弾性シートの保護シートを周着したので、保護シートによって粘弾性シートの損傷を防ぐことができる。この場合の保護シートとしては、例えば耐候性、使用環境温度など使用条件に応じて様々なものを選択可能である。一例として、粘弾性シートへの熱伝導を抑制するアルミ箔、不織布、樹脂フィルムなどを使用できるが、何れにしても粘弾性体の伸縮変形への阻害が少ない程度の柔軟性、変形性、可撓性等を備えるものである必要がある。  According to the fourth aspect of the present invention, in the damping coil spring, a viscoelastic sheet protective sheet is circumferentially attached to the other surface of the viscoelastic sheet having one surface circumscribed by the coil spring. Can prevent damage. As the protective sheet in this case, various kinds of sheets can be selected according to use conditions such as weather resistance and use environment temperature. As an example, aluminum foil, non-woven fabric, resin film, etc. that suppresses heat conduction to the viscoelastic sheet can be used, but in any case, flexibility, deformability, possible to the extent that there is little hindrance to expansion and deformation of the viscoelastic body. It is necessary to have flexibility.

請求項５記載の本発明は、前記ダンピングコイルばねについて、コイルどうしの間に架け渡した粘弾性シートの外面部分に、コイルばねの伸縮による粘弾性シートの外側への膨出を押さえる規制手段を設けたので、コイルばねの伸縮による粘弾性シートの外向きへの折れ曲がりを内向きへの折れ曲がり変形に規制して、粘弾性シートのコイルばねに対する剥離を抑えることができる。こうした膨出規制手段としては、ひも状または帯状の線状体にて構成することができる。そして、その線状体は、ダンピングコイルばねの自由な伸縮を損なわない柔軟性・可撓性を持つものが良い。具体的に線状体を取付けるには、例えば、コイルどうしのピッチに対応させるように螺旋状に粘弾性シートの外面部分に巻き付けるようにすればよい。  In the fifth aspect of the present invention, the damping coil spring is provided with a restricting means for suppressing an outward expansion of the viscoelastic sheet due to the expansion and contraction of the coil spring on the outer surface portion of the viscoelastic sheet spanned between the coils. Since it provided, the outward bending of the viscoelastic sheet due to the expansion and contraction of the coil spring can be restricted to the inward bending deformation, and the peeling of the viscoelastic sheet from the coil spring can be suppressed. Such bulge regulating means can be constituted by a string-like or belt-like linear body. And the linear body has a softness | flexibility and flexibility which do not impair the free expansion-contraction of a damping coil spring. In order to specifically attach the linear body, for example, it may be spirally wound around the outer surface portion of the viscoelastic sheet so as to correspond to the pitch between the coils.

請求項６記載の本発明は、前記ダンピングコイルばねについて、粘弾性シートを暖める発熱体を備えるので、寒冷地で使用する場合にも、粘弾性シートの硬化を防ぎ、その減衰力を確実に発揮することができる。この場合には、例えばコイルばねの内側に発熱体としての面状発熱体を備えるものとして構成できる。なおこのときは、面状発熱体を例えばコイルばねの端部に取付けた端板などに取付けるものとして構成することも可能である。また、一方面をコイルばねに周着した粘弾性シートの他方面に、面状発熱体を備えるものとして構成することもできる。なお、このときは、面状発熱体として可撓性のあるシート状のものを、粘弾性シートに貼着したものとして構成すれば、面状発熱体とダンピングコイルばねとの一体化によって、取扱性を良好なものとすることができる。さらに、この場合に、粘弾性シートとして自己粘着力を有するものを使用すれば、面状発熱体の貼着に別途の接着剤等の使用を廃止して生産コストを低減でき、またその要否に応じて面状発熱体を着脱できるようになる。  According to the sixth aspect of the present invention, since the damping coil spring includes a heating element that warms the viscoelastic sheet, the viscoelastic sheet is prevented from being hardened even when used in a cold region, and its damping force is reliably exhibited. can do. In this case, for example, a planar heating element as a heating element can be provided inside the coil spring. In this case, the planar heating element may be attached to an end plate attached to the end of the coil spring, for example. Moreover, it can also comprise as a thing provided with a planar heating element in the other surface of the viscoelastic sheet | seat which circle | worn the one surface to the coil spring. At this time, if the sheet-like heating element is a flexible sheet-like one that is attached to a viscoelastic sheet, the sheet-like heating element and the damping coil spring are integrated to handle it. The property can be improved. Furthermore, in this case, if a viscoelastic sheet having self-adhesive strength is used, the production cost can be reduced by eliminating the use of a separate adhesive or the like for sticking the sheet heating element. Depending on the situation, the sheet heating element can be attached and detached.

以上のような本発明のダンピングコイルばねで、ばね要素を構成するコイルばねとしては、請求項７記載の本発明のように、圧縮コイルばね、引っ張りコイルばね、ねじりコイルばねの何れに対しても適用することが可能である。したがって、使用条件に応じてこれらのコイルばねに減衰力を付与することが可能となる。また、以上のような本発明のダンピングコイルばねで、減衰要素を構成する粘弾性シートとしては、いわゆる粘弾性体でなる粘弾性体シートや、これと同等の減衰性のあるゴム材料のゴムシートを適用することが可能である。  In the above-described damping coil spring of the present invention, the coil spring constituting the spring element can be any one of a compression coil spring, a tension coil spring, and a torsion coil spring as in the present invention according to claim 7. It is possible to apply. Therefore, it is possible to apply a damping force to these coil springs according to the use conditions. In addition, as the viscoelastic sheet constituting the damping element in the above-described damping coil spring of the present invention, a viscoelastic sheet made of a so-called viscoelastic body, or a rubber sheet made of a rubber material equivalent to this is used. It is possible to apply.

請求項８記載の本発明は、請求項１〜請求項６何れか１項記載のダンピングコイルばねを備える振動減衰装置としたものであるため、上記のダンピングコイルばねによる優れた防・除振性能を発揮することができる。この振動減衰装置では、上記ダンピングコイルばねを１個又は複数個備えるものとして構成できる。  Since the present invention described in claim 8 is a vibration damping device including the damping coil spring according to any one of claims 1 to 6, it has excellent anti-vibration and vibration isolation performance by the above-described damping coil spring. Can be demonstrated. This vibration damping device can be configured to include one or more damping coil springs.

本発明のダンピングコイルばねによれば、コイルばねに減衰力を付与することができ、しかもその構成をコイルばねに粘弾性シートを周着するという極めて簡易な構成で実現できる。したがって、様々な機器の防振系に介在させる機械部品として適用できる程度に汎用性が高く、また使用条件に応じてその振動減衰特性の設計変更が自由であり、生産も容易で多種多様なコイルばねに減衰力を付与することが可能である。  According to the damping coil spring of the present invention, a damping force can be applied to the coil spring, and the configuration can be realized with an extremely simple configuration in which a viscoelastic sheet is attached to the coil spring. Therefore, it is so versatile that it can be applied as a mechanical part to be interposed in the vibration isolation system of various devices, and its design of vibration damping characteristics can be freely changed according to the usage conditions, making it easy to produce and a wide variety of coils. A damping force can be applied to the spring.

本発明のダンピングコイルばねによれば、粘弾性シートの剪断、引張り・圧縮だけでなく、コイルばねの伸縮に追随する折れ曲がりの変形要素が加わることで、被支持体が軽量であっても、優れた防・除振性能を発揮しつつ信頼性ある製品として実現することができる。具体的には、被支持体の質量が５００ｇ（下限値）であっても、振動系の固有振動数の下限値が２Ｈｚ〜３Ｈｚで、共振倍率が２倍以下となる優れた防・除振性能を発揮することができる。  According to the damping coil spring of the present invention, not only the shearing, tension and compression of the viscoelastic sheet but also the bending deformation element that follows the expansion and contraction of the coil spring is added, so that even if the supported body is lightweight, it is excellent. It can be realized as a reliable product while exhibiting anti-vibration and vibration isolation performance. Specifically, even when the mass of the supported body is 500 g (lower limit), the lower limit of the natural frequency of the vibration system is 2 Hz to 3 Hz, and the resonance magnification is two times or less. Performance can be demonstrated.

以下、本発明の実施形態の例について図面を参照しつつ説明する。  Hereinafter, examples of embodiments of the present invention will be described with reference to the drawings.

第１実施形態〔図１，図２〕； 図１で示すダンピングコイルばね１は、圧縮コイルばね２と、その外周に周着した「粘弾性シート」としての粘弾性体シート３とで構成される。圧縮コイルばね２は、このダンピングコイルばね１の使用条件に応じて、材質、線径、コイル平均径、コイルの内外径、総巻数、自由高さ、ばね定数等が決められる。しかしながら、一般的に共振周波数を低く抑えるためにばね定数を低く設定したものであると、圧縮コイルばね２の減衰力は、極めて乏しく自由振動を早期に減衰させることは期待できない。この不都合は、粘弾性体シート３により解決される。 First Embodiment [FIGS. 1 and 2] ; A damping coil spring 1 shown in FIG. 1 is composed of a compression coil spring 2 and a viscoelastic sheet 3 as a “viscoelastic sheet” that is attached to the outer periphery thereof. The The compression coil spring 2 has a material, a wire diameter, a coil average diameter, an inner and outer diameter of the coil, a total number of turns, a free height, a spring constant, and the like depending on the use conditions of the damping coil spring 1. However, in general, if the spring constant is set to be low in order to keep the resonance frequency low, the damping force of the compression coil spring 2 is extremely poor and it cannot be expected to attenuate the free vibration at an early stage. This inconvenience is solved by the viscoelastic sheet 3.

この実施形態における粘弾性体シート３は、例えばアクリル系樹脂からなる粘弾性体を厚みがほぼ均一となるようにシート状としたものである。また、粘弾性体シート３は、圧縮コイルばね２の自由長よりも長いものを使用している。粘弾性体シート３における「粘弾性体」は、天然ゴムや合成ゴムなどの所謂ゴム材を含まない用語として使用している。例えば振動に関連する物理値を粘弾性体と防振ゴムとで対比すると、粘弾性体は損失係数ｔａｎδが０．７程度の値を示す物質であるのに対して、防振ゴムは損失係数ｔａｎδが０．３程度の値を示す物質であり、両者は明確に区別されるものである。また、本形態の粘弾性体シート３は、自己粘着性を有するもので、図１（Ｂ）で示すように、隣接するコイル間の隙間ｄに曲がり込む湾曲部３ａが形成されるように、圧縮コイルばね２に圧着されている。これによって粘弾性体シート３は、圧縮コイルばね２が圧縮変形した際に、湾曲部３ａが外向きに膨出するように変形するのではなく、圧縮コイルばね２の中心軸方向へと内向きに折れ曲がり変形させることが、確実にできるようになる。これに加えて、圧縮コイルばね２が伸縮しないときだけでなく、伸縮したときにおいても、圧縮コイルばね２に対する固着面積を大きくなり、剥離し難く一体性が高められている。この圧着による固着は、割り型を締めて粘弾性体シート３を圧縮コイルばね３の外周から押圧するようにすれば得ることができる。  The viscoelastic body sheet 3 in this embodiment is a viscoelastic body made of, for example, an acrylic resin, which is formed into a sheet shape so that the thickness is substantially uniform. The viscoelastic sheet 3 is longer than the free length of the compression coil spring 2. The “viscoelastic body” in the viscoelastic sheet 3 is used as a term that does not include so-called rubber materials such as natural rubber and synthetic rubber. For example, when the physical values related to vibration are compared between a viscoelastic body and an anti-vibration rubber, the viscoelastic body is a substance having a loss coefficient tanδ of about 0.7, whereas the anti-vibration rubber has a loss coefficient. tan δ is a substance showing a value of about 0.3, and both are clearly distinguished. Moreover, the viscoelastic sheet 3 of this embodiment has self-adhesiveness, and as shown in FIG. 1B, a curved portion 3a that bends into the gap d between adjacent coils is formed. It is crimped to the compression coil spring 2. Thus, the viscoelastic sheet 3 does not deform so that the curved portion 3a bulges outward when the compression coil spring 2 is compressed and deformed, but inwardly toward the central axis of the compression coil spring 2. It can be surely bent and deformed. In addition to this, not only when the compression coil spring 2 does not expand and contract, but also when the compression coil spring 2 expands and contracts, the fixing area with respect to the compression coil spring 2 is increased, and it is difficult to peel off and the integrity is improved. The adhesion by this crimping can be obtained by tightening the split mold and pressing the viscoelastic sheet 3 from the outer periphery of the compression coil spring 3.

そして、以上のような本形態のダンピングコイルばね１によれば、例えば圧縮コイルばね２の減衰比が０．０００１程度のものである場合、減衰比を０．６程度にまで改善することができる。つまり、振動系に置かれて圧縮コイルばね２が伸縮すると、それに伴って粘弾性体シート３がコイルどうしの間で折れ曲がり変形するように動作する。この折れ曲がり変形によって粘弾性体シート３の動的ばね定数を低減することができるため、従来例のような粘弾性体の（断）面積の極小化や、厚みや長さの増長を抑制することができ、組立作業性や加工性が容易となり、また剥離現象の危惧が無く、安定した減衰特性の確保が容易となる。そして、粘弾性体シート３は、剪断と引張り・圧縮と、湾曲部３ａにおける折れ曲がり変形とが複合的に作用することによって、優れた防・除振性能を発揮することが可能となる。具体的には、被支持体の質量が５００ｇ（下限値）の軽量対象物であっても、振動系の固有振動数の下限値が２Ｈｚ〜３Ｈｚで、共振倍率が２倍以下となる優れた防・除振性能を発揮することができるものである。そして、こうした本形態のダンピングコイルばね１によれば、圧縮コイルばね２による振動絶縁と粘弾性シート３の減衰力とによって、圧縮コイルばね２の自由振動（伸縮）を速く減衰させるとともに、振動系の固有振動数と共振倍率を何れも低くすることが可能である。  According to the damping coil spring 1 of the present embodiment as described above, for example, when the compression coil spring 2 has a damping ratio of about 0.0001, the damping ratio can be improved to about 0.6. . That is, when the compression coil spring 2 is expanded and contracted by being placed in the vibration system, the viscoelastic sheet 3 operates so as to bend and deform between the coils. Since the dynamic spring constant of the viscoelastic body sheet 3 can be reduced by this bending deformation, minimization of the (cut) area of the viscoelastic body and the increase in thickness and length as in the conventional example are suppressed. As a result, assembly workability and workability are facilitated, and there is no fear of a peeling phenomenon, and it is easy to secure stable damping characteristics. The viscoelastic sheet 3 can exhibit excellent anti-vibration / vibration-proof performance by the combined action of shearing, tension / compression, and bending deformation in the bending portion 3a. Specifically, even if the weight of the supported body is 500 g (lower limit), the lower limit of the natural frequency of the vibration system is 2 Hz to 3 Hz, and the resonance magnification is excellent. It can exhibit anti-vibration and anti-vibration performance. According to the damping coil spring 1 of this embodiment, the free vibration (extension / contraction) of the compression coil spring 2 is quickly attenuated by the vibration insulation by the compression coil spring 2 and the damping force of the viscoelastic sheet 3, and the vibration system It is possible to reduce both the natural frequency and the resonance magnification.

さらに、本形態のダンピングコイルばね１によれば、圧縮コイルばね２に粘弾性体シート３を周着した構成によって、仮に圧縮コイルばね２に、設計時には想定していなかったサージングやバックリングを起こすような偏荷重が加わったような場合でも、粘弾性体シート３が、それを補助的に抑える一助として機能することができる。  Furthermore, according to the damping coil spring 1 of the present embodiment, the compression coil spring 2 is subjected to surging or buckling that was not assumed at the time of design, by virtue of the configuration in which the viscoelastic sheet 3 is circumferentially attached to the compression coil spring 2. Even when such an unbalanced load is applied, the viscoelastic body sheet 3 can function as an aid to restrain it.

本形態のダンピングコイルばね１によれば、粘弾性体シート３を圧縮コイルばね２に周着するという、構成が極めて簡素であるがゆえに、振動対策用の機械部品として各種機器に組み込んで使用されるコイルばねと同様に、機械部品としての取扱いが可能である。よって、従来ではコイルばね以外にダンパーを別体として他の場所に併設せざるを得なかった振動対策を、本形態のダンピングコイルばね１では、圧縮コイルばね２と並列にダンパーを併設しなくてもよく、それ単独で実現することができる。  According to the damping coil spring 1 of the present embodiment, since the configuration in which the viscoelastic sheet 3 is attached to the compression coil spring 2 is extremely simple, it is used by being incorporated in various devices as a mechanical part for vibration countermeasures. It can be handled as a machine part in the same way as a coil spring. Therefore, in the related art, as a countermeasure against vibration, in which a damper is separately provided in addition to the coil spring, the damper is not provided in parallel with the compression coil spring 2 in the damping coil spring 1 of this embodiment. It can be realized by itself.

本形態のダンピングコイルばね１によれば、振動減衰特性の変更・調整が極めて容易である。すなわち、ダンピングコイルばね１は、圧縮コイルばね２に粘弾性体シート３を外付けで周着してなる簡素な構成であるがゆえに、ばね要素となる圧縮コイルばね２と減衰要素となる粘弾性体シート３とのバランス調整が、自由であり容易である。つまり、本形態のダンピングコイルばね１では、粘弾性体シート３の質量、つまり厚みや面積を変更する際に、図１で示すとおり、それを制約する他の構造要素が存在しない。特に、圧縮コイルばね２の線径よりも薄肉の粘弾性体シート３の使用も可能である。したがって、粘弾性体シート３の厚みや面積（圧縮コイルばね２に周着する面積）の選択が自由であり、その自由な選択によって、振動減衰性能の設計変更の自由度も拡大されるため、振動減衰特性の変更・調整が自由且つ容易に行える。この結果、ダンピングコイルばね１を用いれば、様々な機器の防振部品として、その取付箇所の防振系の振動特性に容易に適合させるように設計できる。  According to the damping coil spring 1 of the present embodiment, it is very easy to change and adjust the vibration damping characteristics. That is, since the damping coil spring 1 has a simple configuration in which a viscoelastic body sheet 3 is externally attached to the compression coil spring 2, the compression coil spring 2 serving as a spring element and the viscoelasticity serving as a damping element. The balance adjustment with the body sheet 3 is free and easy. That is, in the damping coil spring 1 of the present embodiment, when changing the mass, that is, the thickness or area of the viscoelastic sheet 3, there is no other structural element that restricts it as shown in FIG. In particular, it is possible to use a viscoelastic sheet 3 that is thinner than the wire diameter of the compression coil spring 2. Therefore, the thickness and area of the viscoelastic sheet 3 (area around the compression coil spring 2) can be freely selected, and the freedom of the design change of the vibration damping performance is expanded by the free selection. The vibration damping characteristics can be changed and adjusted freely and easily. As a result, if the damping coil spring 1 is used, it can be designed as an anti-vibration component for various devices so that it can easily be adapted to the vibration characteristics of the anti-vibration system at the mounting location.

そして、ダンピングコイルばね１は、前述のように、例えば割り型を用いて圧縮コイルばね２に粘弾性体シート３を押圧して周着させるだけであるため、多種多様な圧縮コイルばね２についてロット数の多少に拘わらず自在に対処することができる。  As described above, since the damping coil spring 1 is merely formed by pressing the viscoelastic sheet 3 against the compression coil spring 2 by using, for example, a split mold, the lot of various compression coil springs 2 is used. It can be dealt with freely regardless of the number.

第２実施形態〔図３〕； 図３で示すダンピングコイルばね４は、第１実施形態の変形形態であり、その相違点は、粘弾性体シート３を圧縮コイルばね２の内周に周着した点である。このようにしても、第１実施形態のものと同様の作用・効果を得ることができる。また、特に粘弾性体シート３に粘着性がある場合には、粘弾性体シート３が圧縮コイルばね２によって被覆され、全面が外部に露出しないため、その損傷を少なくすることができ、異物の付着も少なくすることができる。 Second Embodiment [FIG. 3] ; A damping coil spring 4 shown in FIG. 3 is a modification of the first embodiment, and the difference is that the viscoelastic sheet 3 is attached to the inner periphery of the compression coil spring 2. This is the point. Even if it does in this way, the effect | action and effect similar to the thing of 1st Embodiment can be acquired. In particular, when the viscoelastic sheet 3 is sticky, since the viscoelastic sheet 3 is covered with the compression coil spring 2 and the entire surface is not exposed to the outside, the damage can be reduced. Adhesion can also be reduced.

第３実施形態〔図４〕； 図４で示すダンピングコイルばね５は、第１実施形態の変形形態であり、その相違点は、粘弾性体シート３にコイル間に入り込む湾曲部３ａを形成せずに、真っ直ぐに周着した点である。このような場合であっても、圧縮コイルばね２の伸縮に伴って粘弾性体シート３がコイル間で折れ曲がり変形することができる。 Third Embodiment [FIG. 4] A damping coil spring 5 shown in FIG. 4 is a modification of the first embodiment, and the difference is that a curved portion 3a that enters between the coils is formed in the viscoelastic sheet 3. It is a point that went around without going straight. Even in such a case, the viscoelastic sheet 3 can be bent and deformed between the coils as the compression coil spring 2 expands and contracts.

第４実施形態〔図５〕； 図５で示すダンピングコイルばね６は、第１実施形態の変形形態であり、その相違点は、第１実施形態では粘弾性体シート３を圧縮コイルばね２の全周に周着していたのを、本実施形態では粘弾性体シート７ａ，７ｂ，７ｃ，７ｄのように周方向で分割して、部分的に周着させるようにしたものである。これによっても粘弾性体シート７ａ，７ｂ，７ｃ，７ｄにおける剪断、引張り・圧縮、折れ曲がりの変形要素が複合的に作用することで、軽量対象物でも優れた減衰性能を発揮することができる。なお、図示した４分割の態様は一例であり、複数であれば何分割でもよい。 Fourth Embodiment [FIG. 5] A damping coil spring 6 shown in FIG. 5 is a modification of the first embodiment. The difference is that in the first embodiment, the viscoelastic sheet 3 is replaced by the compression coil spring 2. In the present embodiment, it is divided in the circumferential direction and partially worn around the entire circumference, like viscoelastic sheet 7a, 7b, 7c, 7d. Also by this, the deformation elements of shear, tension / compression, and bending in the viscoelastic sheets 7a, 7b, 7c, and 7d act in a composite manner, so that excellent attenuation performance can be exhibited even for a lightweight object. In addition, the aspect of 4 division shown in figure is an example, and as long as there are multiple, it may be divided into any number.

第５実施形態〔図６］； 図６で示すダンピングコイルばね８は、第１実施形態の変形形態であり、その相違点は、粘弾性体シート３の外側に保護シート９を周着した点である。このため、本実施形態であれば、粘弾性体シート３を損傷や汚損等から保護することが可能である。このような保護シート９としては、例えば耐候性、使用環境温度など使用条件に応じて様々なものを選択可能である。一例として、アルミ箔、不織布、樹脂フィルムなどを使用できるが、何れにしても粘弾性体シート３の伸縮変形への阻害が少ない程度の柔軟性、変形性、可撓性等を備えるものである必要がある。 Fifth Embodiment [FIG. 6] A damping coil spring 8 shown in FIG. 6 is a modification of the first embodiment, and the difference is that a protective sheet 9 is attached to the outside of the viscoelastic sheet 3. It is. For this reason, if it is this embodiment, it is possible to protect the viscoelastic sheet | seat 3 from damage, contamination, etc. As such a protective sheet 9, various things can be selected according to use conditions, such as a weather resistance and use environment temperature, for example. As an example, aluminum foil, non-woven fabric, resin film, and the like can be used, but in any case, the viscoelastic sheet 3 has flexibility, deformability, flexibility, etc. with a small degree of hindrance to expansion / contraction deformation. There is a need.

第６実施形態〔図７〕； 図７で示すダンピングコイルばね１０は、第１実施形態の変形形態であり、その相違点は、圧縮コイルばね２が伸縮した際に、コイルどうしのピッチに位置する粘弾性体シート３の湾曲部３ａが外向きに膨出変形しないように、規制手段としての線状体１１を粘弾性体シート３の外周面に螺旋状として巻き付けた点である。したがって、湾曲部３ａを常に内向きにコイル間へと折れ曲がり変形させることが可能であり、粘弾性体シート３の圧縮コイルばね２に対する剥離を抑えることができる。 Sixth Embodiment [FIG. 7] A damping coil spring 10 shown in FIG. 7 is a modification of the first embodiment, and the difference is that when the compression coil spring 2 expands and contracts, it is positioned at the pitch between the coils. In other words, the linear body 11 serving as the restricting means is spirally wound around the outer peripheral surface of the viscoelastic sheet 3 so that the bending portion 3a of the viscoelastic sheet 3 does not bulge and deform outward. Therefore, it is possible to always bend and deform the bending portion 3a inwardly between the coils, and it is possible to suppress the peeling of the viscoelastic sheet 3 from the compression coil spring 2.

第７実施形態〔図８〕； 図８で示すダンピングコイルばね１２は、分図（ａ）で示すように、圧縮コイルばね２の上端・下端に、溶接ナット１３を備える取付板１４を溶接したものである。したがって、この実施形態によれば、溶接ナット１３に締結した取付軸１３ａを、例えば被支持体となる各種機器の脚部に固定したりすることで、容易に各種機器に組み込むことができる。また、ダンピングコイルばね１２の内部が粘弾性体シート３と取付板１４とによって閉塞され、内外の空気の通路が周着した粘弾性体シート３の端部どうしの隙間だけとなるので、エアダンパーとしての効用も期待できる。なお、溶接ナット１３と取付板１４は、例えば分図（ｂ）のように取付突起１５ａを一体に備える取付板１５としたり、分図（ｃ）のようにボルト１６ａを一体に備える取付板１６などを用いることもできる。 7th Embodiment [FIG. 8] ; The damping coil spring 12 shown in FIG. 8 welded the attachment plate 14 provided with the welding nut 13 to the upper end and the lower end of the compression coil spring 2, as shown to a partial figure (a). Is. Therefore, according to this embodiment, the mounting shaft 13a fastened to the welding nut 13 can be easily incorporated into various devices by, for example, fixing the mounting shaft 13a to the leg portions of the various devices serving as the support. Further, since the inside of the damping coil spring 12 is closed by the viscoelastic sheet 3 and the mounting plate 14, only the gap between the ends of the viscoelastic sheet 3 around which the inner and outer air passages are attached is provided. The utility as can be expected. The welding nut 13 and the mounting plate 14 are, for example, a mounting plate 15 integrally provided with a mounting protrusion 15a as shown in a partial diagram (b), or a mounting plate 16 integrally provided with a bolt 16a as shown in a partial diagram (c). Etc. can also be used.

第８実施形態〔図９〕； 図９で示すダンピングコイルばね１７は、第７実施形態の変形形態であり、相違点は、取付板１５の内面に数ミリの薄さの面状発熱体１８を取付けた点である。これによれば、寒冷地で使用する場合にも、粘弾性シートの硬化を防ぎ、その減衰力を確実に発揮することができる。 Eighth Embodiment [FIG. 9] A damping coil spring 17 shown in FIG. 9 is a modification of the seventh embodiment. The difference is that a planar heating element 18 having a thickness of several millimeters is formed on the inner surface of the mounting plate 15. It is the point which attached. According to this, even when used in a cold region, the viscoelastic sheet can be prevented from hardening and its damping force can be reliably exhibited.

ダンピングコイルばねを備える振動減衰装置の実施形態〔図１０〕； 図１０に、第７実施形態のダンピングコイルばね１２を備える振動減衰装置１９を示す。振動減衰装置１９は、上部筐体１９ａと下部筐体１９ｂとを備える。上部筐体１９ａには、下部筐体１９ｂに突設した係止突起１９ｃと係合する係合孔１９ｄが形成されている。また、上部筐体１９ａと下部筐体１９ｂには、ダンピングコイルばね１２の取付軸１３ａの固定孔１９ｅが形成されており、そこにダンピングコイルばね１２が固定されている。この際、ダンピングコイルばね１２は、被支持体の重量に応じた予圧をかけた状態で固定されている。なお、図１０では２つしか表れていないが、実際には４つのダンピングコイルばね１２が備わっている。ダンピングコイルばね１２はそれ単体で機械部品として使用することも可能であるが、このように複数のダンピングコイルばね１２を用いることで振動減衰装置１９として構成することもできる。 Embodiment of Vibration Damping Device Comprising Damping Coil Spring [FIG. 10] FIG. 10 shows a vibration damping device 19 comprising the damping coil spring 12 of the seventh embodiment. The vibration damping device 19 includes an upper housing 19a and a lower housing 19b. The upper housing 19a is formed with an engagement hole 19d that engages with a locking projection 19c projecting from the lower housing 19b. The upper casing 19a and the lower casing 19b are formed with a fixing hole 19e for the mounting shaft 13a of the damping coil spring 12, and the damping coil spring 12 is fixed thereto. At this time, the damping coil spring 12 is fixed in a state where a preload according to the weight of the supported body is applied. Although only two are shown in FIG. 10, actually four damping coil springs 12 are provided. The damping coil spring 12 can be used alone as a mechanical part, but can be configured as the vibration damping device 19 by using a plurality of damping coil springs 12 in this way.

その他の変形例； 粘弾性体シート３が自己粘着力を有しないものである場合、粘着テープなどを使用しての周着が可能であり、また固着前に、例えばコイルばねや粘弾性体シートに固着力を高めるプライマー処理などの前処理を行ってもよい。また、前記第１実施形態では、圧縮コイルばね２の外周に粘弾性体シート３を圧着する一例として、割り型の型締めにより加圧することで圧着する説明をしたが、こうした割り型を用いずに、治具に固定した圧縮コイルばね２の外周に、粘弾性体シート３を巻き付けるようにしてもよい。 Other modified examples : When the viscoelastic sheet 3 does not have self-adhesive strength, it can be attached using an adhesive tape or the like, and before being fixed, for example, a coil spring or a viscoelastic sheet. Further, a pretreatment such as a primer treatment for increasing the fixing force may be performed. Moreover, in the said 1st Embodiment, although demonstrated as an example which crimps | bonds the viscoelastic sheet | seat 3 to the outer periphery of the compression coil spring 2, it crimped | bonded by pressurizing by the mold clamping of a split mold, However, Such a split mold is not used. Further, the viscoelastic sheet 3 may be wound around the outer periphery of the compression coil spring 2 fixed to the jig.

前記各実施形態では、ばね要素である「コイルばね」として、圧縮コイルばね２への適用例を示したが、引っ張りコイルばね、ねじりコイルばねにも粘弾性体シート３を周着することで、ダンピングコイルばねとしての実施が可能である。また、前記各実施形態では、減衰要素である「粘弾性シート」として、粘弾性体でなる粘弾性体シート３の使用例を示したが、減衰性の天然ゴム又は合成ゴムのゴム材料でなるゴムシートを使用することもできる。ただし、このゴムシートと粘弾性体シート３とを比較すると、本発明者の知る限りにおいて、現存するゴムシートでは、前述の損失係数を含めた減衰特性について、粘弾性体シート３と同等の特性を得ることは期待することができない。したがって、粘弾性体シート３よりも減衰特性では劣るが、目的とする用途について、ゴムシートの減衰特性でも必要な性能が得られる場合には、低廉なゴムシートの使用も可能である。  In each of the above-described embodiments, an example of application to the compression coil spring 2 was shown as a “coil spring” that is a spring element, but by attaching the viscoelastic sheet 3 to a tension coil spring and a torsion coil spring, Implementation as a damping coil spring is possible. In each of the above-described embodiments, the use example of the viscoelastic body sheet 3 made of a viscoelastic body is shown as the “viscoelastic sheet” that is the damping element, but the rubber material is made of a natural rubber or a synthetic rubber. A rubber sheet can also be used. However, when this rubber sheet and the viscoelastic material sheet 3 are compared, as far as the present inventors know, the existing rubber sheet has the same characteristics as the viscoelastic material sheet 3 with respect to the attenuation characteristics including the above-described loss coefficient. You can't expect to get. Therefore, although the damping characteristic is inferior to that of the viscoelastic sheet 3, if the required performance can be obtained even with the damping characteristic of the rubber sheet for the intended use, an inexpensive rubber sheet can be used.

本発明のダンピングコイルばねは、選択するコイルばねに応じて極めて広汎な用途がある。その全てを列挙するのは不可能であるが、たとえば、振動対策用の機械部品として各種機器の振動系への組み込みが可能である。また、振動を嫌う計測機器や光学機器等の防振脚としての実施も可能である。さらに、図１のダンピングコイルばね１を子ダンパーとするダイナミックダンパーとしての実施も可能である。  The damping coil spring of the present invention has a very wide range of uses depending on the coil spring selected. Although it is impossible to enumerate all of them, for example, as a mechanical part for vibration countermeasures, various devices can be incorporated into the vibration system. In addition, it can be implemented as a vibration-proof leg of a measuring instrument or optical instrument that dislikes vibration. Further, it can be implemented as a dynamic damper using the damping coil spring 1 of FIG. 1 as a child damper.

第１実施形態によるダンピングコイルばねを示す図で、分図（Ａ）は正面図、分図（Ｂ）は断面図。It is a figure which shows the damping coil spring by 1st Embodiment, A divided figure (A) is a front view, A divided figure (B) is sectional drawing. 図１のダンピングコイルばねの動作説明図。Operation | movement explanatory drawing of the damping coil spring of FIG. 第２実施形態によるダンピングコイルばねを示す断面図。Sectional drawing which shows the damping coil spring by 2nd Embodiment. 第３実施形態によるダンピングコイルばねを示す断面図。Sectional drawing which shows the damping coil spring by 3rd Embodiment. 第４実施形態によるダンピングコイルばねを示す平面図。The top view which shows the damping coil spring by 4th Embodiment. 第５実施形態によるダンピングコイルばねを示す断面図。Sectional drawing which shows the damping coil spring by 5th Embodiment. 第６実施形態によるダンピングコイルばねを示す断面図。Sectional drawing which shows the damping coil spring by 6th Embodiment. 第７実施形態によるダンピングコイルばねを示す図で、分図（ａ）は断面図、分図（ｂ）は取付板の他の例を示す半断面図、分図（ｃ）は取付板の更に他の例を示す半断面図。It is a figure which shows the damping coil spring by 7th Embodiment, a part (a) is sectional drawing, a part (b) is a half sectional view which shows the other example of a mounting plate, and a part (c) is further of a mounting plate. The half sectional view showing other examples. 第８実施形態によるダンピングコイルばねを示す断面図。Sectional drawing which shows the damping coil spring by 8th Embodiment. 一実施形態による振動減衰装置を示す断面図。Sectional drawing which shows the vibration damping device by one Embodiment.

符号の説明Explanation of symbols

１ ダンピングコイルばね（第１実施形態）
２ 圧縮コイルばね
３ 粘弾性体シート
３ａ 湾曲部
４ ダンピングコイルばね（第２実施形態）
５ ダンピングコイルばね（第３実施形態）
６ ダンピングコイルばね（第４実施形態）
７ａ，７ｂ，７ｃ，７ｄ 粘弾性体シート
８ ダンピングコイルばね（第５実施形態）
９ 保護シート
１０ ダンピングコイルばね
１１ 線状体（規制手段）
１２ ダンピングコイルばね（第７実施形態）
１３ 溶接ナット
１３ａ 取付軸
１４ 取付板
１５ 取付板
１５ａ 取付突起
１６ 取付板
１６ａ ボルト
１７ ダンピングコイルばね（第８実施形態）
１８ 面状発熱体
１９ 振動減衰装置
１９ａ 上部筐体
１９ｂ 下部筐体
１９ｃ 係止突起
１９ｄ 係合孔
１９ｅ 固定孔1 Damping coil spring (first embodiment)
2 Compression coil spring 3 Viscoelastic sheet 3a Bending portion 4 Damping coil spring (second embodiment)
5 Damping coil spring (third embodiment)
6 Damping coil spring (fourth embodiment)
7a, 7b, 7c, 7d Viscoelastic sheet 8 Damping coil spring (fifth embodiment)
9 Protective sheet 10 Damping coil spring 11 Linear body (regulating means)
12 Damping coil spring (seventh embodiment)
13 welding nut 13a mounting shaft 14 mounting plate 15 mounting plate 15a mounting projection 16 mounting plate 16a bolt 17 damping coil spring (eighth embodiment)
18 Planar heating element 19 Vibration damping device 19a Upper housing 19b Lower housing 19c Locking protrusion 19d Engagement hole 19e Fixing hole

Claims (8)

コイルばねの外周か内周の少なくとも何れかに粘弾性シートを周着してなるダンピングコイルばね。  A damping coil spring formed by attaching a viscoelastic sheet to at least one of an outer periphery and an inner periphery of a coil spring. コイルばねと、コイルばねの伸縮変形とともにコイルどうしの間で折れ曲がり変形する粘弾性シートと、を備えるダンピングコイルばね。  A damping coil spring comprising: a coil spring; and a viscoelastic sheet that bends and deforms between coils along with expansion and contraction of the coil spring. 粘弾性シートをコイルどうしの隙間に入り込ませるようにコイルばねに周着した請求項１又は請求項２記載のダンピングコイルばね。  The damping coil spring according to claim 1 or 2, wherein the viscoelastic sheet is circumferentially attached to the coil spring so as to enter the gap between the coils. 一方面をコイルばねに周着した粘弾性シートの他方面に、粘弾性シートの保護シートを周着した請求項１〜請求項３何れか１項記載のダンピングコイルばね。  The damping coil spring according to any one of claims 1 to 3, wherein a viscoelastic sheet protective sheet is circumferentially attached to the other surface of the viscoelastic sheet whose one surface is circumferentially attached to the coil spring. コイルどうしの間に架け渡した粘弾性シートの外面部分に、コイルばねの伸縮による粘弾性シートの外側への膨出を押さえる規制手段を設けた請求項１〜請求項４何れか１項記載のダンピングコイルばね。  5. The control device according to claim 1, further comprising: a restricting unit configured to suppress bulge of the viscoelastic sheet to the outside due to expansion and contraction of the coil spring on an outer surface portion of the viscoelastic sheet that is bridged between the coils. Damping coil spring. 粘弾性シートを暖める発熱体を備える請求項１〜請求項５何れか１項記載のダンピングコイルばね。  The damping coil spring according to any one of claims 1 to 5, further comprising a heating element that warms the viscoelastic sheet. コイルばねが、圧縮コイルばね、引っ張りコイルばね、ねじりコイルばねの何れかである請求項１〜請求項６何れか１項記載のダンピングコイルばね。  The damping coil spring according to any one of claims 1 to 6, wherein the coil spring is any one of a compression coil spring, a tension coil spring, and a torsion coil spring. 請求項１〜請求項７何れか１項記載のダンピングコイルばねを備える振動減衰装置。  A vibration damping device comprising the damping coil spring according to any one of claims 1 to 7.
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