JP2001200890A - Base isolation bed - Google Patents

Base isolation bed

Info

Publication number
JP2001200890A
JP2001200890A JP2000008561A JP2000008561A JP2001200890A JP 2001200890 A JP2001200890 A JP 2001200890A JP 2000008561 A JP2000008561 A JP 2000008561A JP 2000008561 A JP2000008561 A JP 2000008561A JP 2001200890 A JP2001200890 A JP 2001200890A
Authority
JP
Japan
Prior art keywords
sphere
seismic isolation
isolation table
concave portions
elastomer
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
Application number
JP2000008561A
Other languages
Japanese (ja)
Inventor
Hirokazu Matsukawa
浩和 松川
Takashi Nakamura
貴司 中村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bando Chemical Industries Ltd
Original Assignee
Bando Chemical Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bando Chemical Industries Ltd filed Critical Bando Chemical Industries Ltd
Priority to JP2000008561A priority Critical patent/JP2001200890A/en
Publication of JP2001200890A publication Critical patent/JP2001200890A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To promptly damp vibration with a simple structure eliminating the need of a space, with reference to a rolling base isolation bed provided with a spherical body 10. SOLUTION: An elastomer member 12 is provided on a surface part of both concave portions 3a, 7a of an upper and a lower members 1, 5. When an earthquake occurs, a spherical body 10 is structured to roll over between both concave portions 3a, 7a with contacting the concave portions 3a, 7a surfaces of the upper and lower member 1, 5 through the elastomer member 12. Damping force is applied on the spherical body 10 by the elastomer member 12.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、美術工芸品等の展
示ケース、医療機器、OA機器等のように地震による転
倒を防止する必要があるものを載置しておく免震台に関
する技術分野に属する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation table on which objects that need to be prevented from falling down due to an earthquake, such as display cases for arts and crafts, medical equipment, OA equipment, etc., are placed. Belongs to.

【0002】[0002]

【従来の技術】従来より、この種の免震台としては転が
り式のものが知られており、このものは、例えば特開平
10−262759号公報に示されているように、下面
に皿状の凹部が形成された上側部材と、上面に、該上側
部材の凹部の下側に対向するように皿状の凹部が形成さ
れた下側部材とを備え、この上側及び下側部材の両凹部
間に球体が転がり可能に設けられて、この球体により上
側部材を下側部材に対して支持するようにしている。こ
の免震台では、地震発生時に球体が上側及び下側部材の
両凹部間を地震動の方向に転がることで上側部材が下側
部材に対して相対移動し、このことにより、上側部材の
揺れが抑えられ、上側部材上面に載置したものが倒れる
のを防止することができる。
2. Description of the Related Art Conventionally, a rolling-type seismic isolation table of this type has been known, and this type is disclosed in, for example, Japanese Patent Application Laid-Open No. 10-262759. An upper member having a concave portion formed thereon, and a lower member having a dish-shaped concave portion formed on an upper surface thereof so as to face a lower side of the concave portion of the upper member. Both concave portions of the upper and lower members are provided. A sphere is provided between the spheres so as to be rollable, and the sphere supports the upper member with respect to the lower member. In this seismic isolation table, when an earthquake occurs, the sphere rolls between the concave portions of the upper and lower members in the direction of the seismic motion, so that the upper member relatively moves with respect to the lower member. Thus, the object placed on the upper surface of the upper member can be prevented from falling down.

【0003】[0003]

【発明が解決しようとする課題】しかし、上記従来の転
がり式のものでは、上側部材の下側部材に対する振動を
減衰させるための機構が重力によるものであるので、上
側部材が下側部材に対して自由振動に近い挙動を示し、
振動の収まりが悪く、このため、振動を減衰させるため
に油圧ダンパや高粘度の減衰剤等を有する減衰機構を別
途に設ける必要があり、免震台が複雑で高価なものにな
ってしまうという問題がある。
However, in the above-mentioned conventional rolling type, since the mechanism for damping the vibration with respect to the lower member of the upper member is based on gravity, the upper member is in contact with the lower member. Shows behavior close to free vibration,
Vibration is difficult to settle, and it is necessary to separately provide a damping mechanism having a hydraulic damper and a high-viscosity damping agent in order to damp the vibration, which makes the seismic isolation table complicated and expensive. There's a problem.

【0004】本発明は斯かる点に鑑みてなされたもので
あり、その目的とするところは、上記のような転がり式
の免震台に対して、その構成を改良することによって、
簡単でかつスペースを必要としない構成で振動を速やか
に減衰させるようにすることにある。
[0004] The present invention has been made in view of such a point, and an object of the present invention is to improve the structure of the above-mentioned rolling seismic isolation table by improving the structure.
An object of the present invention is to provide a simple and space-saving configuration for quickly damping vibration.

【0005】[0005]

【課題を解決するための手段】上記の目的を達成するた
めに、この発明では、地震発生時に球体が上側及び下側
部材の両凹部表面にエラストマー部材を介して接触しな
がら該両凹部間を転がるようにした。
In order to achieve the above-mentioned object, according to the present invention, when an earthquake occurs, a sphere contacts the surfaces of both upper and lower members via an elastomer member to form a gap between the two concave portions. I tried to roll.

【0006】具体的には、請求項1の発明では、下面に
皿状の凹部が形成された上側部材と、上面に、該上側部
材の凹部の下側に対向するように皿状の凹部が形成され
た下側部材と、上記上側及び下側部材の両凹部間に転が
り可能に設けられ、該上側部材を下側部材に対して支持
する球体とを備えた免震台を対象とする。
More specifically, according to the first aspect of the present invention, the upper member having the dish-shaped recess formed on the lower surface, and the dish-shaped recess formed on the upper surface so as to face below the recess of the upper member. The present invention is directed to a seismic isolation table including a formed lower member and a sphere that is provided between the recesses of the upper and lower members so as to be rollable and supports the upper member with respect to the lower member.

【0007】そして、地震発生時に上記球体が上記上側
及び下側部材の両凹部表面にエラストマー部材を介して
接触しながら該両凹部間を転がるように構成されている
ものとする。
Further, it is assumed that the sphere rolls between the concave portions of the upper and lower members while coming into contact with the surfaces of the concave portions of the upper and lower members via an elastomer member when an earthquake occurs.

【0008】上記の構成により、地震発生時に球体が両
凹部間を転がることで免震効果が得られと共に、その転
がり時にエラストマー部材により球体に減衰力が作用す
るので、振動が速やかに減衰する。そして、このような
エラストマー部材は、両凹部や球体の表面部に設ける等
すればよく、簡単な構成でしかも大きなスペースを必要
としない。この結果、油圧ダンパ等の減衰機構を別途に
設けなくても済み、低コストで小型の免震台が得られ
る。
[0008] With the above configuration, when the sphere rolls between the two concave portions when an earthquake occurs, a seismic isolation effect is obtained, and when the sphere rolls, a damping force is applied to the sphere by the elastomer member, so that the vibration is rapidly attenuated. Such an elastomer member may be provided in both the concave portions and the surface of the sphere, and has a simple configuration and does not require a large space. As a result, it is not necessary to separately provide a damping mechanism such as a hydraulic damper, and a low-cost and small seismic isolation table can be obtained.

【0009】請求項2の発明では、請求項1の発明にお
いて、エラストマー部材は、上側及び下側部材の両凹部
の表面部に設けられているものとする。また、請求項3
の発明では、請求項1の発明において、エラストマー部
材は、球体の表面部全体に設けられているものとする。
According to a second aspect of the present invention, in the first aspect of the present invention, the elastomer member is provided on the surface of both the concave portions of the upper and lower members. Claim 3
According to the invention, the elastomer member is provided on the entire surface of the sphere.

【0010】これらの発明により、エラストマー部材を
容易にかつ小さいスペースに設けることができると共
に、エラストマー部材の材質、厚み、表面粗度、硬さ等
を変えることで減衰力の大きさを調整することができ
る。
According to these inventions, the elastomer member can be easily provided in a small space, and the magnitude of the damping force can be adjusted by changing the material, thickness, surface roughness, hardness, etc. of the elastomer member. Can be.

【0011】請求項4の発明では、請求項3の発明にお
いて、エラストマー部材の内側に粘性体が設けられてい
るものとする。
According to a fourth aspect of the present invention, in the third aspect, a viscous body is provided inside the elastomer member.

【0012】このことで、球体が転がってエラストマー
部材が変形するときに粘性体によってさらに大きな減衰
力が球体に作用し、振動をより一層効果的に減衰させる
ことができる。
Thus, when the sphere rolls and the elastomer member is deformed, a larger damping force is exerted on the sphere by the viscous body, so that the vibration can be more effectively damped.

【0013】請求項5の発明では、請求項1〜4のいず
れかの発明において、上側部材の下側部材に対する水平
方向の最大変位を所定値以下に規制する規制手段を備え
ているものとする。
According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, there is provided a regulating means for regulating a maximum horizontal displacement of the upper member relative to the lower member to a predetermined value or less. .

【0014】このことにより、予想以上に大きい震度の
地震が発生したときに球体が凹部の外側へ飛び出すのを
防止することができる。
Thus, it is possible to prevent the sphere from jumping out of the concave portion when an earthquake with a seismic intensity larger than expected occurs.

【0015】請求項6の発明では、請求項5の発明にお
いて、規制手段は、高分子材料からなりかつ上側及び下
側部材同士を連結する紐状部材であるものとする。
According to a sixth aspect of the present invention, in the fifth aspect of the invention, the restricting means is a string-shaped member made of a polymer material and connecting the upper and lower members.

【0016】こうすることで、規制手段を簡単に構成で
きると共に、紐状部材の長さを適切な値に設定しておく
ことで、球体が凹部の外側へ飛び出すのを防止すること
ができる。また、紐状部材が張力の作用によりある程度
伸びる材質であれば、上側部材の下側部材に対する相対
移動が紐状部材により規制されたときに、紐状部材が伸
びることで上側部材に大きな衝撃力が作用するのを抑制
することができる。よって、予想以上に大きい震度の地
震が発生したときでも、上側部材上面に載置したものが
倒れるのを防止することができる。
By doing so, the regulating means can be simply configured, and by setting the length of the cord-like member to an appropriate value, it is possible to prevent the sphere from jumping out of the concave portion. In addition, if the string-shaped member is made of a material that can be stretched to some extent by the action of tension, when the relative movement of the upper member with respect to the lower member is restricted by the string-shaped member, the string-shaped member is stretched and a large impact force is applied to the upper member. Can be suppressed. Therefore, even when an earthquake with a seismic intensity larger than expected occurs, it is possible to prevent the object placed on the upper member from falling down.

【0017】請求項7の発明では、請求項5の発明にお
いて、規制手段は、上側及び下側部材の両凹部の周縁部
全周にそれぞれ設けられかつ球体の転がり移動を規制す
るストッパ部材であるものとする。
According to a seventh aspect of the present invention, in the fifth aspect of the present invention, the restricting means is a stopper member provided on the entire periphery of both the concave portions of the upper and lower members and restricting the rolling movement of the sphere. Shall be.

【0018】このことで、球体がストッパ部材に当接す
ることにより凹部の外側へ飛び出すのを防止することが
できると共に、そのストッパ部材の球体当接面部にエラ
ストマー部材を設ける等しておくことで、球体当接時に
上側部材に作用する衝撃力を低減させるようにすること
ができる。よって、請求項6の発明と同様の作用効果が
得られる。
By this, it is possible to prevent the sphere from jumping out of the concave portion due to contact with the stopper member, and to provide an elastomer member on the sphere contact surface portion of the stopper member. The impact force acting on the upper member at the time of contact with the sphere can be reduced. Therefore, the same function and effect as the sixth aspect of the invention can be obtained.

【0019】[0019]

【発明の実施の形態】(実施形態1)図1及び図2は、
本発明の実施形態1に係る免震台を示し、この免震台
は、互いに上下方向に対向する上側部材1と下側部材5
とを備えており、この上側部材1の上面に美術工芸品等
の展示ケース、医療機器、OA機器等を載置しておい
て、この載置したものが地震発生時に倒れないようにす
るものである。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIGS.
1 shows a seismic isolation table according to Embodiment 1 of the present invention, which includes an upper member 1 and a lower member 5 which are vertically opposed to each other.
A display case for arts and crafts, a medical device, an OA device, etc. are placed on the upper surface of the upper member 1 so that the placed product does not fall down when an earthquake occurs. It is.

【0020】上記上側部材1は、平面視で略矩形状の上
側部材本体2と該上側部材本体2の下面における4つの
角部にそれぞれ取付固定された上側支持部材3とからな
り、この上側支持部材3の下面には皿状の凹部3aが形
成されている。
The upper member 1 comprises an upper member body 2 having a substantially rectangular shape in a plan view and upper support members 3 fixed to four corners on the lower surface of the upper member body 2, respectively. A dish-shaped concave portion 3a is formed on the lower surface of the member 3.

【0021】一方、上記下側部材5は、平面視で略矩形
状の下側部材本体6と該下側部材本体6の上面における
4つの角部にそれぞれ取付固定された下側支持部材7と
からなり、この下側支持部材7の上面には、上記上側支
持部材3の凹部3aの下側に対向するように皿状の凹部
7aが形成されている。尚、上記上側及び下側支持部材
3,7は、鋼等の金属部材やカーボン繊維強化プラスチ
ック等の強化樹脂部材で構成されている。
On the other hand, the lower member 5 includes a lower member main body 6 having a substantially rectangular shape in a plan view and lower support members 7 attached and fixed to four corners on the upper surface of the lower member main body 6, respectively. A dish-shaped recess 7a is formed on the upper surface of the lower support member 7 so as to face below the recess 3a of the upper support member 3. The upper and lower support members 3 and 7 are made of a metal member such as steel or a reinforced resin member such as carbon fiber reinforced plastic.

【0022】上記上側及び下側支持部材3,7の両凹部
3a,7aの表面は共に球面状をなし、その両凹部3
a,7a間には、上側支持部材3(上側部材1)を下側
支持部材7(下側部材5)に対して支持する金属製の球
体10が設けられ、この球体10は、通常時は、上側支
持部材3の凹部3aの最も凹んだ部分(最上部)と下側
支持部材7の凹部7aの最も凹んだ部分(最下部)とに
接触している。
The surfaces of the recesses 3a, 7a of the upper and lower support members 3, 7 are both spherical,
A metal sphere 10 for supporting the upper support member 3 (upper member 1) with respect to the lower support member 7 (lower member 5) is provided between a and 7a. The uppermost support member 3 is in contact with the most concave portion (uppermost portion) of the concave portion 3a and the lower support member 7 is in contact with the most concave portion (lowest portion) of the concave portion 7a.

【0023】上記上側及び下側支持部材3,7の両凹部
3a,7a表面の曲率半径R及び球体10の半径rは、
球体10が上側及び下側支持部材3,7の両凹部3a,
7aの表面を転がる際の固有周期をTとし、重力加速度
をgとしたとき、 T=2×π×((R−r)/g)1/2 より決定される。
The radius of curvature R of the surface of the concave portions 3a, 7a of the upper and lower support members 3, 7 and the radius r of the sphere 10 are as follows:
The sphere 10 is provided with both concave portions 3a of the upper and lower support members 3, 7,
Assuming that T is the natural period when rolling on the surface of 7a and g is the gravitational acceleration, it is determined by T = 2 × π × ((R−r) / g) 1/2 .

【0024】上記上側及び下側支持部材3,7の両凹部
3a,7aの表面部には、高減衰ゴム、ウレタンゴム、
高分子材料等からなる薄板状のエラストマー部材12が
接着固定され、このことで、免震台は、地震発生時に上
記球体10が上側及び下側支持部材3,7の両凹部3
a,7a表面にエラストマー部材12を介して接触しな
がら該両凹部3a,7a間を転がるように構成されてい
る。
On the surfaces of the recesses 3a, 7a of the upper and lower support members 3, 7, high damping rubber, urethane rubber,
A thin plate-like elastomer member 12 made of a polymer material or the like is adhered and fixed, so that the seismic isolation table allows the sphere 10 to move to the upper and lower support members 3, 7 when the earthquake occurs.
It is configured to roll between the two concave portions 3a and 7a while contacting the surfaces of the concave portions 3a and 7a with the elastomer member 12 interposed therebetween.

【0025】上記上側部材本体2下面及び下側部材本体
6上面の両中央部同士は、ナイロンやビニール等の高分
子材料からなる紐状部材15により連結されている。こ
の紐状部材15は、上側部材1の下側部材5に対する水
平方向の最大変位を所定値以下に規制する規制手段を構
成しており、上側部材1が下側部材5に対して水平方向
に最大変位したときに、球体10が上側及び下側支持部
材3,7の両凹部3a,7aの外側へ飛び出さないよう
な長さに設定されている。
The central portions of the lower surface of the upper member main body 2 and the upper surface of the lower member main body 6 are connected to each other by a string-shaped member 15 made of a polymer material such as nylon or vinyl. The string-shaped member 15 constitutes a restricting means for restricting the maximum horizontal displacement of the upper member 1 relative to the lower member 5 to a predetermined value or less. The length is set so that the sphere 10 does not protrude outside the concave portions 3a, 7a of the upper and lower support members 3, 7 when the maximum displacement occurs.

【0026】以上の構成からなる免震台の地震発生時の
動作について説明する。
The operation of the seismic isolation table having the above-described configuration when an earthquake occurs will be described.

【0027】地震が発生すると地震動に応じて下側部材
5が揺れるが、このとき、図3に示すように、球体10
が上側及び下側支持部材3,7の両凹部3a,7a間を
地震動の方向に転がりながら往復移動(振動)する。こ
の球体10の移動に伴って上側部材1が下側部材5に対
して地震動の方向に相対移動することになるため、下側
部材5の揺れが上側部材1にまで伝わらず、上側部材1
の揺れを抑えることができる。この結果、上側部材1上
面に載せたものが倒れるのを防止することができる。し
かも、球体10が上側及び下側支持部材3,7の両凹部
3a,7a間を転がる際に、該両凹部3a,7aの表面
部に設けたエラストマー部材12により球体10に減衰
力が作用するので、振動を速やかに減衰させることがで
きる。この減衰力の大きさは、エラストマー部材12の
材質、厚み、表面粗度、硬さ等を変えることで調整する
ことができる。したがって、振動を速やかに減衰させる
ために油圧ダンパ等の減衰機構を別途に設ける必要がな
く、構成が簡単になって、免震台を低コストでかつ小型
化することができる。
When an earthquake occurs, the lower member 5 shakes in response to the seismic motion. At this time, as shown in FIG.
Reciprocates (vibrates) while rolling between the concave portions 3a and 7a of the upper and lower support members 3 and 7 in the direction of the seismic motion. Since the upper member 1 moves relative to the lower member 5 in the direction of the seismic motion with the movement of the sphere 10, the swing of the lower member 5 is not transmitted to the upper member 1 and the upper member 1
Can be suppressed. As a result, the object placed on the upper surface of the upper member 1 can be prevented from falling down. Moreover, when the sphere 10 rolls between the recesses 3a, 7a of the upper and lower support members 3, 7, a damping force acts on the sphere 10 by the elastomer member 12 provided on the surface of the recesses 3a, 7a. Therefore, the vibration can be rapidly attenuated. The magnitude of the damping force can be adjusted by changing the material, thickness, surface roughness, hardness and the like of the elastomer member 12. Therefore, it is not necessary to separately provide a damping mechanism such as a hydraulic damper for rapidly damping the vibration, and the configuration is simplified, and the seismic isolation table can be reduced in cost and size.

【0028】また、上側部材本体2下面及び下側部材本
体6上面の両中央部同士が紐状部材15により連結され
ているので、予想以上に大きい震度の地震が発生したと
しても、球体10が両凹部3a,7aの外側へ飛び出す
前に紐状部材15により上側部材1の下側部材5に対す
る相対移動が規制される。しかも、紐状部材15が高分
子材料からなるので、紐状部材15に張力が作用したと
きにある程度伸びるため、上側部材1の下側部材5に対
する相対移動が紐状部材15により規制されたときに、
紐状部材15が伸びて上側部材1にはそれ程大きな衝撃
力は作用しない。よって、予想以上に大きい震度の地震
が発生したときでも、上側部材1上面に載置したものが
転倒するのを防止することができる。
Further, since the central portions of the lower surface of the upper member main body 2 and the upper surface of the lower member main body 6 are connected to each other by the string-shaped member 15, even if an earthquake with a seismic intensity larger than expected occurs, Before jumping out of the recesses 3a, 7a, the string member 15 restricts the relative movement of the upper member 1 with respect to the lower member 5. Moreover, since the string-like member 15 is made of a polymer material, the string-like member 15 is stretched to some extent when tension is applied to the string-like member 15, so that the relative movement of the upper member 1 with respect to the lower member 5 is restricted by the string-like member 15. To
The string-like member 15 extends, so that a large impact force does not act on the upper member 1. Therefore, even when an earthquake with a seismic intensity larger than expected occurs, it is possible to prevent the object placed on the upper surface of the upper member 1 from falling over.

【0029】尚、上記実施形態1では、1つの紐状部材
15により上側部材本体2下面及び下側部材本体6上面
の両中央部同士を連結するようにしたが、例えば図4に
示すように、4つの紐状部材15により上側部材本体2
の4つの側面と下側部材本体6の4つの側面とをそれぞ
れ連結するようにしてもよい。 (実施形態2)図5は本発明の実施形態2を示し(尚、
以下の各実施形態では、図1と同じ部分については同じ
符号を付してその詳細な説明は省略する)、上側部材1
の下側部材5に対する水平方向の最大変位を所定値以下
に規制する規制手段を上記実施形態1とは異ならせたも
のである。
In the first embodiment, the central portions of the lower surface of the upper member main body 2 and the upper surface of the lower member main body 6 are connected to each other by one string-shaped member 15, for example, as shown in FIG. , Upper member main body 2 by four cord members 15
May be connected to the four side surfaces of the lower member body 6, respectively. (Embodiment 2) FIG. 5 shows Embodiment 2 of the present invention.
In the following embodiments, the same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.)
The restriction means for restricting the maximum horizontal displacement of the lower member 5 to a predetermined value or less is different from that of the first embodiment.

【0030】すなわち、この実施形態2では、上記実施
形態1における紐状部材15の代わりに、規制手段とし
て、上側及び下側支持部材3,7の両凹部3a,7aの
周縁部全周に球体10の転がり移動を規制するストッパ
部材17がそれぞれ設けられている。この上側支持部材
3のストッパ部材17は、下方に突出するように該上側
支持部材3と一体に設けられ、下側支持部材7のストッ
パ部材17は、上方に突出するように該下側支持部材7
と一体に設けられており、予想以上に大きい震度の地震
が発生したときに球体10が当接するようになされてい
る。これら両ストッパ部材17の球体10の当接面部に
は、両凹部3a,7aの表面部に設けたエラストマー部
材12が延設されていて、球体10がストッパ部材17
にエラストマー部材12を介して当接するようになって
いる(図6参照)。尚、両ストッパ部材17の球体10
の当接面は球面状をなし、その曲率半径r′は、球体1
0の半径rよりも大きくかつ両凹部3a,7a表面の曲
率半径Rよりも小さく設定されている。
That is, in the second embodiment, instead of the string-like member 15 in the first embodiment, a spherical member is provided on the entire periphery of the concave portions 3a, 7a of the upper and lower support members 3, 7 as a regulating means. Stopper members 17 for restricting the rolling movement of 10 are provided respectively. The stopper member 17 of the upper support member 3 is provided integrally with the upper support member 3 so as to protrude downward, and the stopper member 17 of the lower support member 7 is provided so as to protrude upward. 7
The sphere 10 is brought into contact when an earthquake with a magnitude higher than expected occurs. An elastomer member 12 provided on the surface of both recesses 3a, 7a extends from the contact surface of the sphere 10 of both stopper members 17, and the sphere 10 is attached to the stopper member 17a.
Are brought into contact with each other via an elastomer member 12 (see FIG. 6). The spheres 10 of both stopper members 17
Has a spherical surface, and its radius of curvature r 'is
The radius is set to be larger than the radius r of 0 and smaller than the radius of curvature R of the surfaces of the concave portions 3a and 7a.

【0031】したがって、上記実施形態2においても、
上記実施形態1と同様に、エラストマー部材12により
振動を速やかに減衰させることができると共に、予想以
上に大きい震度の地震が発生したとしても、ストッパ部
材17により球体10が上側及び下側支持部材3,7の
両凹部3a,7aの外側へ飛び出すのを防止することが
できる。また、エラストマー部材12がストッパ部材1
7の球体10の当接面部にまで延設されているので、球
体10がストッパ部材17に当接しても、上側部材1に
作用する衝撃力を低減させることができ、上側部材1上
面に載置したものが倒れるのを防止することができる。
Therefore, also in the second embodiment,
As in the first embodiment, the vibration can be rapidly attenuated by the elastomer member 12, and even if an earthquake with a seismic intensity larger than expected occurs, the sphere 10 is moved by the stopper member 17 to the upper and lower support members 3. , 7 can be prevented from jumping out of the recesses 3a, 7a. In addition, the elastomer member 12 is the stopper member 1
7 extends to the contact surface portion of the sphere 10, the impact force acting on the upper member 1 can be reduced even when the sphere 10 contacts the stopper member 17, and the sphere 10 is placed on the upper surface of the upper member 1. The placed object can be prevented from falling down.

【0032】(実施形態3)図7は本発明の実施形態3
を示し、エラストマー部材12の配設位置を上記実施形
態1,2とは異ならせたものである。
(Embodiment 3) FIG. 7 shows Embodiment 3 of the present invention.
And the arrangement position of the elastomer member 12 is different from those of the first and second embodiments.

【0033】すなわち、この実施形態2では、エラスト
マー部材12が球体10の表面部全体に設けられ、上側
及び下側支持部材3,7の両凹部3a,7aの表面部に
は設けられていない。尚、上記球体10の中心部は、金
属等の硬質部材で構成されている。
That is, in the second embodiment, the elastomer member 12 is provided on the entire surface of the spherical body 10 and is not provided on the surface of the concave portions 3a, 7a of the upper and lower support members 3, 7. The center of the sphere 10 is made of a hard material such as metal.

【0034】したがって、上記実施形態3においても、
上記実施形態1,2と同様に、球体10が上側及び下側
支持部材3,7の両凹部3a,7a間を転がる際に、球
体10の表面部全体に設けたエラストマー部材12によ
り該球体10に減衰力が作用するので、振動を速やかに
減衰させることができる。また、減衰力の大きさを、エ
ラストマー部材12の材質、厚み、表面粗度、硬さ等を
変えることで調整することができる。よって、上記実施
形態1,2と同様の作用効果が得られる。
Therefore, also in the third embodiment,
As in the first and second embodiments, when the sphere 10 rolls between the concave portions 3a, 7a of the upper and lower support members 3, 7, the sphere 10 is formed by the elastomer member 12 provided on the entire surface of the sphere 10. Since the damping force acts on the vibration, the vibration can be rapidly damped. Further, the magnitude of the damping force can be adjusted by changing the material, thickness, surface roughness, hardness and the like of the elastomer member 12. Therefore, the same operation and effect as those of the first and second embodiments can be obtained.

【0035】尚、上記実施形態3では、球体10の中心
部を金属等の硬質部材で構成したが、中心部もエラスト
マー部材12(表面部と同じ材質でも異なる材質でもよ
い)で構成してもよい。また、エラストマー部材12の
内側にシリコン等の粘性体を設けてもよい。この場合、
粘性体をエラストマー部材12と中心部の硬質部材との
間に設けてもよく、硬質部材をなくして中心部全体に粘
性体を設けてもよい。このように粘性体を設ければ、球
体10が転がってエラストマー部材12が変形するとき
に粘性体によってさらに大きな減衰力が球体10に作用
し、振動をより一層効果的に減衰させることができる。
In the third embodiment, the central portion of the sphere 10 is formed of a hard member such as a metal, but the central portion may be formed of an elastomer member 12 (the same material as the surface portion or a different material). Good. Further, a viscous body such as silicon may be provided inside the elastomer member 12. in this case,
The viscous body may be provided between the elastomer member 12 and the hard member at the center, or the viscous body may be provided over the entire center without the hard member. By providing the viscous body in this manner, when the sphere 10 rolls and the elastomer member 12 is deformed, a larger damping force acts on the sphere 10 by the viscous body, and the vibration can be more effectively damped.

【0036】また、上記実施形態3では、上記実施形態
1と同様に、上側部材本体2下面及び下側部材本体6上
面の両中央部同士を紐状部材5により連結したが、上記
実施形態2のように、上側及び下側支持部材3,7の両
凹部3a,7aの周縁部全周に球体10の転がり移動を
規制するストッパ部材17をそれぞれ設けるようにして
もよい。
In the third embodiment, as in the first embodiment, the central portions of the lower surface of the upper member main body 2 and the upper surface of the lower member main body 6 are connected to each other by the string-shaped member 5. As described above, stopper members 17 for restricting the rolling movement of the sphere 10 may be provided on the entire periphery of the concave portions 3a, 7a of the upper and lower support members 3, 7, respectively.

【0037】[0037]

【発明の効果】以上説明したように、本発明の免震台に
よると、地震発生時に球体が上側及び下側部材の両凹部
表面にエラストマー部材を介して接触しながら該両凹部
間を転がるように構成したことにより、振動を速やかに
減衰させることが可能な低コストで小型の免震台が得ら
れる。
As described above, according to the seismic isolation table of the present invention, when an earthquake occurs, the sphere rolls between the concave portions of the upper and lower members while making contact with the surfaces of the concave portions via the elastomer member. With this configuration, it is possible to obtain a low-cost and small seismic isolation table capable of rapidly attenuating vibration.

【図面の簡単な説明】[Brief description of the drawings]

【図1】図2のI−I線拡大断面図である。FIG. 1 is an enlarged cross-sectional view taken along line II of FIG.

【図2】本発明の実施形態1に係る免震台を示す斜視図
である。
FIG. 2 is a perspective view showing the seismic isolation table according to Embodiment 1 of the present invention.

【図3】免震台の作動時の状態を示す図1相当図であ
る。
FIG. 3 is a diagram corresponding to FIG. 1, showing a state when the seismic isolation table is operated.

【図4】実施形態1の変形例を示す図2相当図である。FIG. 4 is a diagram corresponding to FIG. 2, showing a modification of the first embodiment.

【図5】実施形態2を示す図1相当図である。FIG. 5 is a view corresponding to FIG. 1 showing a second embodiment.

【図6】実施形態2に係る免震台の作動状態を示す図5
相当図である。
FIG. 6 is a view showing an operation state of the base isolation table according to the second embodiment.
FIG.

【図7】実施形態3を示す図1相当図である。FIG. 7 is a view corresponding to FIG. 1 showing a third embodiment.

【符号の説明】[Explanation of symbols]

1 上側部材 3a 凹部 5 下側部材 7a 凹部 10 球体 12 エラストマー部材 15 紐状部材(規制手段) 17 ストッパ部材(規制手段) DESCRIPTION OF SYMBOLS 1 Upper member 3a recessed part 5 Lower member 7a recessed part 10 Spherical body 12 Elastomer member 15 String-shaped member (restriction means) 17 Stopper member (restriction means)

Claims (7)

【特許請求の範囲】[Claims] 【請求項1】 下面に皿状の凹部が形成された上側部材
と、上面に、該上側部材の凹部の下側に対向するように
皿状の凹部が形成された下側部材と、上記上側及び下側
部材の両凹部間に転がり可能に設けられ、該上側部材を
下側部材に対して支持する球体とを備えた免震台であっ
て、 地震発生時に上記球体が上記上側及び下側部材の両凹部
表面にエラストマー部材を介して接触しながら該両凹部
間を転がるように構成されていることを特徴とする免震
台。
An upper member having a dish-shaped recess formed on a lower surface; a lower member having a dish-shaped recess formed on an upper surface to face a lower side of the recess of the upper member; And a sphere that is provided between the two concave portions of the lower member so as to be rollable, and that supports the upper member with respect to the lower member. A seismic isolation table configured to roll between the concave portions while contacting the surfaces of the concave portions of the member via an elastomer member.
【請求項2】 請求項1記載の免震台において、 エラストマー部材は、上側及び下側部材の両凹部の表面
部に設けられていることを特徴とする免震台。
2. The seismic isolation table according to claim 1, wherein the elastomer member is provided on the surface of both recesses of the upper and lower members.
【請求項3】 請求項1記載の免震台において、 エラストマー部材は、球体の表面部全体に設けられてい
ることを特徴とする免震台。
3. The seismic isolation table according to claim 1, wherein the elastomer member is provided on the entire surface of the sphere.
【請求項4】 請求項3記載の免震台において、 エラストマー部材の内側に粘性体が設けられていること
を特徴とする免震台。
4. The seismic isolation table according to claim 3, wherein a viscous body is provided inside the elastomer member.
【請求項5】 請求項1〜4のいずれかに記載の免震台
において、 上側部材の下側部材に対する水平方向の最大変位を所定
値以下に規制する規制手段を備えていることを特徴とす
る免震台。
5. The seismic isolation table according to claim 1, further comprising a regulating means for regulating a maximum horizontal displacement of the upper member relative to the lower member to a predetermined value or less. Seismic isolation table.
【請求項6】 請求項5記載の免震台において、 規制手段は、高分子材料からなりかつ上側及び下側部材
同士を連結する紐状部材であることを特徴とする免震
台。
6. The seismic isolation table according to claim 5, wherein the restricting means is a string-shaped member made of a polymer material and connecting the upper and lower members.
【請求項7】 請求項5記載の免震台において、 規制手段は、上側及び下側部材の両凹部の周縁部全周に
それぞれ設けられかつ球体の転がり移動を規制するスト
ッパ部材であることを特徴とする免震台。
7. The seismic isolation table according to claim 5, wherein the restricting means is a stopper member provided on the entire periphery of both concave portions of the upper and lower members and restricting the rolling movement of the sphere. Characteristic seismic isolation table.
JP2000008561A 2000-01-18 2000-01-18 Base isolation bed Pending JP2001200890A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000008561A JP2001200890A (en) 2000-01-18 2000-01-18 Base isolation bed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000008561A JP2001200890A (en) 2000-01-18 2000-01-18 Base isolation bed

Publications (1)

Publication Number Publication Date
JP2001200890A true JP2001200890A (en) 2001-07-27

Family

ID=18536812

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000008561A Pending JP2001200890A (en) 2000-01-18 2000-01-18 Base isolation bed

Country Status (1)

Country Link
JP (1) JP2001200890A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004007991A1 (en) * 2001-01-18 2004-01-22 Tf Sekkei Co., Ltd. Fallout prevention device of base isolation structure
JP2006084014A (en) * 2004-09-14 2006-03-30 Kanazawa Seisakusho:Kk Base isolation device
JP2011038628A (en) * 2009-08-18 2011-02-24 Advanced System Co Ltd Quake-absorbing or vibration-controlling mechanism
ITPN20110013A1 (en) * 2011-03-02 2012-09-03 Babuin Vasco S R L VIBRATION REDUCTION DEVICE, IN PARTICULAR FOR SOUND REPRODUCTION EQUIPMENT
JP2013057392A (en) * 2011-08-12 2013-03-28 Tsk Co Ltd Vibration damping pad
JP2014134222A (en) * 2013-01-08 2014-07-24 Hayashi Bussan Co Ltd Base isolation member

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004007991A1 (en) * 2001-01-18 2004-01-22 Tf Sekkei Co., Ltd. Fallout prevention device of base isolation structure
JP2006084014A (en) * 2004-09-14 2006-03-30 Kanazawa Seisakusho:Kk Base isolation device
JP2011038628A (en) * 2009-08-18 2011-02-24 Advanced System Co Ltd Quake-absorbing or vibration-controlling mechanism
ITPN20110013A1 (en) * 2011-03-02 2012-09-03 Babuin Vasco S R L VIBRATION REDUCTION DEVICE, IN PARTICULAR FOR SOUND REPRODUCTION EQUIPMENT
JP2013057392A (en) * 2011-08-12 2013-03-28 Tsk Co Ltd Vibration damping pad
JP2014134222A (en) * 2013-01-08 2014-07-24 Hayashi Bussan Co Ltd Base isolation member

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