JPH08219213A - Laminated rubber detachable supporter - Google Patents
Laminated rubber detachable supporterInfo
- Publication number
- JPH08219213A JPH08219213A JP2823195A JP2823195A JPH08219213A JP H08219213 A JPH08219213 A JP H08219213A JP 2823195 A JP2823195 A JP 2823195A JP 2823195 A JP2823195 A JP 2823195A JP H08219213 A JPH08219213 A JP H08219213A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- laminated rubber
- laminated
- plates
- rigid plate
- 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.)
- Pending
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 63
- 239000005060 rubber Substances 0.000 title claims abstract description 63
- 238000010030 laminating Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000002184 metal Substances 0.000 description 5
- 244000043261 Hevea brasiliensis Species 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 229920003052 natural elastomer Polymers 0.000 description 3
- 229920001194 natural rubber Polymers 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920005555 halobutyl Polymers 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
Landscapes
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
- Springs (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複数の剛性板とゴム板
とを交互に積層した積層ゴム支承体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated rubber bearing body in which a plurality of rigid plates and rubber plates are alternately laminated.
【０００２】[0002]
【従来の技術】複数のゴム板と剛性板とを交互に積層し
て接着した積層ゴム支承体は、鉛直方向には硬く、水平
方向には柔らかい剛性を有していることから、その上に
建築物や機械を設置し、地震などの振動が建築物に伝達
するのを緩和する免震アイソレータや、機械設備などの
振動を絶縁する防振ゴムとして広く使用されている。す
なわち、鉛直方向の硬い剛性で建築物、設備等をしっか
り支え、水平方向に柔らかい剛性で振動の固有周期をず
らして振動の伝播を防ぐものである。2. Description of the Related Art Laminated rubber bearings in which a plurality of rubber plates and rigid plates are alternately laminated and bonded have a rigidity that is hard in the vertical direction and soft in the horizontal direction. It is widely used as a seismic isolation isolator that installs buildings and machines to reduce the transmission of vibrations such as earthquakes to buildings, and as a vibration isolation rubber that insulates vibrations of machinery and equipment. That is, the rigidity of the vertical direction firmly supports the building, equipment, etc., and the rigidity of the horizontal direction softly shifts the natural period of the vibration to prevent the propagation of the vibration.
【０００３】積層ゴム支承体は、以上の目的で使用され
ることから、水平方向に過大な振動が加わった場合に積
層ゴム支承体が破壊してしまうと、積層ゴム支承体によ
って支持されている建築物や設備が相当の破損を受ける
ことになる。したがって、積層ゴム支承体には、剪断破
断強度や剪断破断歪みなどの水平方向の破断特性が優れ
ていることが要求される。Since the laminated rubber bearing is used for the above-mentioned purpose, if the laminated rubber bearing is broken by excessive vibration in the horizontal direction, the laminated rubber bearing is supported by the laminated rubber bearing. Buildings and equipment will suffer considerable damage. Therefore, the laminated rubber support is required to have excellent horizontal breaking properties such as shear breaking strength and shear breaking strain.
【０００４】従来の積層ゴム支承体を図２に示す。従来
の積層ゴム支承体１は、円形状の上金具２と下金具３と
の間に、複数のゴム板４、４…と剛性板５、５…とを交
互に積層して加硫接着したものであり、剛性板５の直径
に対する厚さは１．５％未満であった。剛性板５の直径
に対する厚さを１．５％未満としていたのは、鉛直方向
の剛性を確保するという剛性板元来の機能を果たすのに
これで十分であり、必要以上に剛性板を厚くすると材料
費が高くなる、積層ゴム支承体の総重量が重くなり施工
性が悪化するなどの理由があったためである。A conventional laminated rubber bearing is shown in FIG. In the conventional laminated rubber bearing 1, a plurality of rubber plates 4, 4, ... and Rigid plates 5, 5, .. The thickness of the rigid plate 5 with respect to the diameter was less than 1.5%. The thickness with respect to the diameter of the rigid plate 5 is set to less than 1.5% because it is sufficient to fulfill the original function of the rigid plate to secure the rigidity in the vertical direction, and the rigid plate is thickened more than necessary. This is because the material cost becomes high, and the total weight of the laminated rubber bearing becomes heavy, resulting in poor workability.
【０００５】[0005]
【発明が解決しようとする課題】この様な積層ゴム支承
体１に振動による圧縮剪断変形が加わると、回転力によ
り剛性板に曲げのモーメントが付加され、変形中、剛性
板に反りが発生し、剛性板の端部に歪みが生じて剛性板
５とゴム板４が剪断方向に破断する原因になると推定さ
れる。すなわち、回転力による剛性板の反りが圧縮剪断
破断特性を低下させていると考えられる。When compressive shear deformation due to vibration is applied to the laminated rubber bearing 1 as described above, a bending moment is applied to the rigid plate by the rotational force, and the rigid plate warps during deformation. It is presumed that the rigid plate 5 is distorted at the ends thereof and causes the rigid plate 5 and the rubber plate 4 to break in the shearing direction. That is, it is considered that the warp of the rigid plate due to the rotational force deteriorates the compressive shear fracture property.
【０００６】剪断破断特性の向上には、特開平１−１０
３６３７号公報に示されるような積層ゴム支承体の周辺
部分の剛性を内側部分より高くする方法や、ゴム材料自
体の破断強度や破断歪みを向上させる方法がある。しか
しながら、前者の場合は周辺部と内側部でゴムを使い分
けなければならず、製作工程が非常に繁雑となるという
欠点があった。また、後者の場合、ゴム材料の破断強度
を向上させるにはカーボンブラックなどの補強剤を多量
に混合することにより得られるが、反面、破断歪みが低
下してしまい、破断歪みを向上させるためにプロセスオ
イル、可塑剤等を多量に配合すると、破断強度が低下し
たり、硬度が低下するためクリープが生じるという欠点
があった。したがって、ゴム材料自体を変化させること
で破断強度と破断歪みの両者を満足させることは困難で
ある。また、ゴム材料特性を変化させると、積層ゴム支
承体の鉛直方向および水平方向の剛性も変化するので、
積層ゴム支承体全体の設計変更をしなければならなかっ
た。To improve the shear rupture properties, Japanese Patent Laid-Open No. 1-10
As disclosed in Japanese Patent No. 3637, there is a method of increasing the rigidity of the peripheral portion of the laminated rubber bearing as compared with the inner portion, and a method of improving the breaking strength and breaking strain of the rubber material itself. However, in the former case, rubber has to be used separately for the peripheral portion and the inner portion, which has a drawback that the manufacturing process becomes very complicated. In the latter case, in order to improve the breaking strength of the rubber material, it can be obtained by mixing a large amount of a reinforcing agent such as carbon black. When a large amount of process oil, plasticizer, etc. is blended, there is a drawback that the breaking strength is lowered and the hardness is lowered, so that creep occurs. Therefore, it is difficult to satisfy both the breaking strength and the breaking strain by changing the rubber material itself. Also, if the rubber material characteristics are changed, the vertical and horizontal rigidity of the laminated rubber bearing also changes, so
The entire laminated rubber bearing had to be redesigned.
【０００７】そこで本発明は、ゴム材料を変化させない
で剪断破断特性を向上させ、製作工程も格別繁雑となら
ない積層ゴム支承体を提供することを目的とする。[0007] Therefore, an object of the present invention is to provide a laminated rubber bearing which improves the shear breaking property without changing the rubber material and does not make the manufacturing process particularly complicated.
【０００８】[0008]
【課題を解決するための手段】本発明の積層ゴム支承体
は、複数の剛性板とゴム板とを交互に積層してなる積層
ゴム支承体の剛性板の厚さを前記ゴム板の直径に対し
１．５〜８．０％としたことを要旨とするものである。According to the laminated rubber bearing of the present invention, the thickness of the rigid plate of the laminated rubber bearing formed by alternately laminating a plurality of rigid plates and rubber plates is set to the diameter of the rubber plate. On the other hand, the gist is to set it to 1.5 to 8.0%.
【０００９】本発明のゴム板は、天然ゴム、ブタジエン
ゴム、スチレンブタジエンゴム、エチレンプロピレンゴ
ム、ブチルゴム、ハロゲン化ブチルゴム、クロロプレン
ゴムなどが挙げられるが、これらにとくに限定されな
い。本発明におけるゴム材料の特性には特別な要求は無
く、従来公知の様々な工夫が成される。例えば、従来の
天然ゴム系積層ゴム支承体に用いられるゴム材料では、
剪断弾性率４〜１０kgf/cm2 、体積弾性率 10000〜2000
0 kgf/cm2 、破断伸び５００〜８００％を有するものが
適用されるが、この様な条件を備えていれば良い。これ
らのゴム材料に、本発明の効果を損なわない範囲でカー
ボンブラック、老化防止剤、加硫剤、加硫促進剤等の添
加剤が配合されるとさらに好ましい。Examples of the rubber plate of the present invention include natural rubber, butadiene rubber, styrene butadiene rubber, ethylene propylene rubber, butyl rubber, halogenated butyl rubber, and chloroprene rubber, but are not particularly limited thereto. There are no special requirements for the characteristics of the rubber material in the present invention, and various conventionally known devices can be made. For example, in the rubber material used for the conventional natural rubber-based laminated rubber bearing,
Shear elastic modulus 4 to 10 kgf / cm 2 , bulk elastic modulus 10000 to 2000
A material having 0 kgf / cm 2 and an elongation at break of 500 to 800% is applied, but it is sufficient if such conditions are provided. It is more preferable to add additives such as carbon black, an antioxidant, a vulcanizing agent, and a vulcanization accelerator to these rubber materials within a range that does not impair the effects of the present invention.
【００１０】本発明の剛性板は、一般構造用圧延鋼材
（ＳＳ４００）、冷間圧延鋼板（ＳＰＣＣ）などの鋼材
が用いられることが多いが、これらと同等の剛性を有す
る材料であれば鋼材に限定する必要はない。また、ゴム
板の直径に対する剛性板の厚さを１．５〜８．０％とす
る理由は、１．５％未満では、剪断変形時の回転力より
生じる曲げのモーメントにより剛性板自体が歪んでしま
うためであり、８．０％を越えた場合には、積層ゴム支
承体の総重量が著しく重くなってしまい施工が困難にな
り、材料費などのコストが増加する反面特性は向上しな
い。For the rigid plate of the present invention, steel materials such as general structural rolled steel (SS400) and cold rolled steel (SPCC) are often used. However, any material having rigidity equivalent to these may be used. There is no need to limit it. The reason why the thickness of the rigid plate relative to the diameter of the rubber plate is set to 1.5 to 8.0% is that when it is less than 1.5%, the rigid plate itself is distorted by the bending moment generated by the rotational force during shear deformation. If it exceeds 8.0%, the total weight of the laminated rubber bearing becomes remarkably heavy and the construction becomes difficult, and the cost such as the material cost increases, but the characteristics do not improve.
【００１１】[0011]
【作用】本発明は、積層ゴム支承体のゴム板の直径に対
する剛性板の厚さを１．５〜８．０％とし、積層ゴム支
承体に圧縮剪断変形が加わった時の回転力により発生す
る剛性板の反りを緩和して、剪断破断特性の向上を達成
するものである。According to the present invention, the thickness of the rigid plate with respect to the diameter of the rubber plate of the laminated rubber bearing is set to 1.5 to 8.0%, and is generated by the rotational force when the laminated rubber bearing is subjected to compressive shear deformation. It is intended to alleviate the warpage of the rigid plate to improve the shear rupture characteristics.
【００１２】[0012]
［実施例１〜５および比較例１〜２］積層ゴム支承体１
０を図１にしたがって説明する。直径５００ｍｍ、厚さ
３０ｍｍでＳＳ４００からなる円板状の上金具１１と下
金具１２との間に、直径５００ｍｍ、厚さ７ｍｍの天然
ゴムからなる円板状のゴム板１３を１４枚と、ＳＳ４０
０からなる直径５００ｍｍで厚さは表１の通りの円板状
の剛性板１４を１３枚積層して、ゴム板と剛性板との間
やゴム板と上金具、下金具との間を加硫接着して実施例
１〜５および比較例１〜２の積層ゴム支承体１０を得
た。[Examples 1-5 and Comparative Examples 1-2] Laminated rubber support 1
0 will be described with reference to FIG. Between the disc-shaped upper metal fitting 11 and the lower metal fitting 12 made of SS400 having a diameter of 500 mm and a thickness of 30 mm, 14 disc-shaped rubber plates 13 made of natural rubber having a diameter of 500 mm and a thickness of 7 mm, and SS40.
The diameter is 500 mm and the thickness is 0. As shown in Table 1, thirteen disc-shaped rigid plates 14 are laminated to add a space between the rubber plate and the rigid plate or between the rubber plate and the upper and lower metal parts. The laminated rubber bearings 10 of Examples 1-5 and Comparative Examples 1-2 were obtained by vulcanization adhesion.
【００１３】この様な積層ゴム支承体１０に対して、面
圧を７０ kgf／cm2 として圧縮剪断破断試験を行い、剪
断破断荷重と破断時変位を測定した。下記の式により剪
断破断強度および剪断破断歪みを求めた。 剪断破断強度＝破断荷重／断面積 剪断破断歪み＝破断時変位／ゴム総厚 その結果を表１に示す。A compression shear rupture test was carried out on such a laminated rubber bearing 10 with a surface pressure of 70 kgf / cm 2 , and shear rupture load and displacement at rupture were measured. Shear rupture strength and shear rupture strain were determined by the following formulas. Shear breaking strength = breaking load / cross sectional area Shear breaking strain = displacement at break / total rubber thickness The results are shown in Table 1.
【００１４】[0014]
【表１】 [Table 1]
【００１５】以上の結果から、剛性板端部の曲げモーメ
ントによる歪みは剛性板を厚くしたことにより減少する
と推定され、これが剪断破断強度および歪みの改善の原
因と考えられる。From the above results, it is estimated that the strain due to the bending moment at the end of the rigid plate is reduced by increasing the thickness of the rigid plate, which is considered to be the cause of the improvement of the shear rupture strength and the strain.
【００１６】[0016]
【発明の効果】本発明は、積層ゴム支承体の剛性板の厚
さをゴム板の直径に対し１．５〜８．０％としたことに
より、水平剛性を変えること無く、剪断破断特性を向上
させることができる。また、ゴム板や剛性板の材料特性
を変えること無く、剪断破断特性を向上することができ
るので、単に設計変更をすれば従来の製品への適用が容
易である。According to the present invention, the thickness of the rigid plate of the laminated rubber bearing is set to 1.5 to 8.0% of the diameter of the rubber plate, so that the shear rupture property can be obtained without changing the horizontal rigidity. Can be improved. Further, since the shear rupture property can be improved without changing the material properties of the rubber plate or the rigid plate, it can be easily applied to conventional products by simply changing the design.
【図１】 本発明の積層ゴム支承体を示す断面図。FIG. 1 is a sectional view showing a laminated rubber bearing of the present invention.
【図２】 従来の積層ゴム支承体を示す断面図。FIG. 2 is a sectional view showing a conventional laminated rubber bearing.
１１……上金具 １２……下金具 １３……ゴム板 １４……剛性板 11 …… Upper metal fitting 12 …… Lower metal fitting 13 …… Rubber plate 14 …… Rigid plate
Claims (1)
なる積層ゴム支承体において、前記剛性板の厚さを前記
ゴム板の直径に対し１．５〜８．０％としたことを特徴
とする積層ゴム支承体。1. In a laminated rubber bearing formed by alternately laminating a plurality of rigid plates and rubber plates, the thickness of the rigid plates is 1.5 to 8.0% with respect to the diameter of the rubber plate. A laminated rubber bearing characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2823195A JPH08219213A (en) | 1995-02-16 | 1995-02-16 | Laminated rubber detachable supporter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2823195A JPH08219213A (en) | 1995-02-16 | 1995-02-16 | Laminated rubber detachable supporter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08219213A true JPH08219213A (en) | 1996-08-27 |
Family
ID=12242831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2823195A Pending JPH08219213A (en) | 1995-02-16 | 1995-02-16 | Laminated rubber detachable supporter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08219213A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5492550A (en) * | 1993-05-12 | 1996-02-20 | Minnesota Mining And Manufacturing Company | Surface treating articles and methods of making same |
| JP2007205492A (en) * | 2006-02-02 | 2007-08-16 | Takenaka Komuten Co Ltd | Laminated rubber bearing and seismic isolation system |
-
1995
- 1995-02-16 JP JP2823195A patent/JPH08219213A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5492550A (en) * | 1993-05-12 | 1996-02-20 | Minnesota Mining And Manufacturing Company | Surface treating articles and methods of making same |
| JP2007205492A (en) * | 2006-02-02 | 2007-08-16 | Takenaka Komuten Co Ltd | Laminated rubber bearing and seismic isolation system |
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