JP2004100829A

JP2004100829A - Base-isolated device

Info

Publication number: JP2004100829A
Application number: JP2002263951A
Authority: JP
Inventors: Keiji Ogata; 小形　慶治; Toshio Komi; 小見　俊夫; Satoshi Fujita; 藤田　聡
Original assignee: Yakmo Co Ltd
Current assignee: Yakmo Co Ltd
Priority date: 2002-09-10
Filing date: 2002-09-10
Publication date: 2004-04-02
Anticipated expiration: 2022-09-10
Also published as: JP4130565B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base-isolated device that can prevent lifting even if a lifting prevention device is not installed newly and enable installation of the machinery without removing cable in the case that the existing machinery with cable is made to be seismic isolating. <P>SOLUTION: This base-isolated device installs an inner rail 33 of a recessed shape in cross section providing an arcuate long hole 35 along the lengthwise direction of an edge side (edge side direction) on the corresponding position to both edge sides installed vertically from the bottom and an outer rail 32 of a recessed shape in cross section providing an arcuate long hole 35 along the lengthwise direction of edge (edge side direction) on the corresponding position to both edges installed vertically from the bottom so that each bottom is in a position of ups and downs. And this device arranges a rail mechanism 40a that enables the relative movement of the inner rail 33 and the outer rail 32 by standing a roller 34 between arcuate long holes 35 of the inner rail 33 and the outer rail 32, and installs the plural rail mechanism 30a similar to the above rail mechanism 40a in a rectangular position to plural parallel rail mechanism 40a so as to be in parallel as well as ups and downs. <P>COPYRIGHT: (C)2004,JPO

Description

【発明の属する技術分野】
本発明は、免震装置に関し、詳しくは、コンピュータ装置等が搭載されたラックや諸種展示ケース等の地震に伴う地震力を低減させる免震装置に関するのである。
【従来の技術】
従来、この種の免震装置としては、種々の構造のものが開発されており、復元動作用に金属ばねや曲線レールを用いたもの、振動減衰手段にオイルダンパ、摩擦ダンパ等を用いたものがある。
例えば特開平１１−７２１４０号公報に記載されているように凹弧状曲面をもつ上下狭圧部材とローラで構成される免震装置が提案されている。
また、免震装置の浮上がり防止対策として、例えば特開２０００−１２０７７６号公報に記載されているローラベアリングを用いた浮上がり防止装置を組み込んだ免震装置が提案されている。
更に、特開平１０−１４９２３０号公報には、被免震体に付属するケーブルを挿通させるケーブル通路を有する免震装置が提案されている。
【発明が解決しようとする課題】
しかしながら、例えば特開平１１−７２１４０号公報に記載された免震装置は、被免震体として重心の高い機器等を設置した状態で設計値を越える変位が発生した場合、ストッパ等で変位を抑制する必要がある。その際、上下狭圧部材とローラに浮上がりが発生し当該機器等が転倒する恐れがある。
このような転倒防止のために、例えば特開２０００−１２０７７６号公報に示すような浮上がり防止装置を設置することが提案されている。
更に、コンピュータ装置等を設置したラックは、付属するケーブル類や通風のための開口部が必要となるが、例えば特開平１０−１４９２３０号公報記載の免震装置では、既存でケーブル類のある機器を設置する場合にはケーブル類を一旦取り外す必要がある。
本発明は、上記従来の実情に鑑み開発されたものであり、浮上がり防止装置を新たに設置しないでも浮き上がりを防止でき、ケーブルを有する既存の機器を免震する場合、ケーブルを取り外すこと無く当該機器を設置することを可能とした免震装置を提供することを目的とする。
【課題を解決するための手段】
上記課題を解決するために、請求項１記載の発明の免震装置は、地震発生の際に被免震体への地震力を低減させる免震装置であって、断面が凹形状で、底辺から立設する両側辺に対応配置に側辺の長さ方向に沿って中央を最下部とした円弧状曲線長孔を設けた内レールと、断面が凹形状で、底辺から立設する両側辺に対応配置に側辺の長さ方向に沿って中央を最下部とした円弧状曲線長孔を設けた外レールとを、互いの底辺が上下配置で、内レール、外レールの円弧状曲線長孔間に転動体を介在させて内レール、外レールを相対移動可能としたレール機構を複数平行に配置し、この複数平行のレール機構と直行する様に前記レール機構と同様な複数のレール機構を平行、且つ、上下に配置することを特徴とするものである。
請求項１記載の発明によれば、内レールは断面が凹形状に形成され、レール側辺に円弧状曲線長孔を有し、当該内レールと天地を逆にした状態で組み合わせた形状が同様な外レールもレール側辺に円弧状曲線長孔を有している。
これらの円弧状曲線長孔の高さ方向の寸法より若干小さい断面円形の転動体であるローラを水平方向に転動可能に介在することにより、内レールと外レールは水平方向に相対移動が可能となっている。
そして、内レールと外レール双方の円弧状曲線長孔の曲率により、この免震装置の固有振動数が最適に決定される。
上側の複数のレール機構上に設置される被免震体の免震を、上下配置の各レール機構により行うものであり、上述した各円弧状曲線長孔に対する転動体の介在により、免震動作時に上向き荷重が発生しても、内レールの浮き上がりを防止でき、また、ケーブルを有する既存の機器を設置し免震する場合でも、上下配置の各レール機構の内部空間にケーブルを配置できるため、ケーブルを取り外すこと無く当該機器を設置することが可能となる。
請求項２記載の発明の免震装置は、地震発生の際に被免震体への地震力を低減させる免震装置であって、内外一対のレールの一方に断面が凹状で、底辺から立設する両側辺に対応配置に側辺の長さ方向に沿って中央を最下部とした円弧状曲線長孔を設け、他方に断面が凹状で、底辺から立設する両側辺に対応配置に側辺の長さ方向に沿った水平状直線長孔を設け、互いの底辺が上下配置で、内レール、外レールの円弧状曲線長孔、水平状直線長孔間に転動体を介在させて内レールと外レールを相対移動可能としたレール機構を複数平行に配置し、この複数平行のレール機構と直交する配置に前記レール機構と同様な複数のレール機構を平行、且つ、上下に配置することを特徴とするものである。
請求項２記載の発明によれば、内レールは断面が凹形状に形成され、レール側辺に円弧状曲線長孔を有し、当該内レールと天地を逆にした状態で組み合わせた形状が同様な外レールはレール側辺に水平状直線長孔を有している。
これらの各長孔の高さ方向の寸法より若干小さい断面円形の転動体であるローラを各長孔に水平方向に転動可能に介在することにより、内レールと外レールは水平方向に相対移動が可能となっている。
そして、内外一方のレールの円弧状曲線長孔の曲率により、この免震装置の固有振動数が最適に決定される。この他の作用は、請求項１記載の発明と同様である。
請求項３記載の発明は、請求項１又は２記載の免震装置において、前記レール機構の内レール、外レール間に、摩擦ダンパ、オイルダンパ、弾塑性ダンパ等から選ばれる減衰手段を単独又は複数併用配置し、内レール、外レールが相対移動した時に前記減衰手段により減衰作用を発揮させることを特徴とするものである。
請求項３記載の発明によれば、地震発生による振動で内レールと外レールが相対移動した際、減衰手段による振動減衰動作が免震装置に付加される。
請求項４記載の発明は、請求項１乃至３のいずれかに記載の免震装置において、前記各レール機構は個別に取り付け、取り外し可能であることを特徴とするものである。
請求項４記載の発明によれば、ケーブルを有する既存の機器を設置し、これを免震する場合でも、各レール機構は個別に取り付け、取り外し可能であり、レール機構を取り外して上下配置の各レール機構の内部空間にケーブルを配置できるため、機器からケーブルを取り外すこと無く当該機器を設置することが可能となる。
【発明の実施の形態】
以下、本発明の実施の形態を詳細に説明する。
図１乃至図９に示す各図は本発明に係る実施の形態を示すものである。
本実施の形態の免震装置は、断面が凹形状で、底辺から立設する両側辺に対応配置に側辺の長さ方向（側辺長さ方向）に沿った円弧状曲線長孔３５を設けた内レール３３と、断面が凹形状で、底辺から立設する両側辺に対応配置に側辺の長さ方向（側辺長さ方向）に沿った円弧状曲線長孔３５を設けた図４に示す外レール３２とを、図５、図６に示すように、互いの底辺が上下配置で、内レール３３、外レール３２の円弧状曲線長孔３５間に転動体であるローラ３４を介在させて、図７に示すように、内レール３３、外レール３２を水平方向に相対移動可能としたレール機構４０ａを有している。
前記ローラ３４は、円弧状曲線長孔３５の高さ方向の寸法より若干小さい寸法を有する断面円形に形成している。
前記レール機構４０ａは、図２、図３に示すように、ベースプレート５０上に複数平行に配置し、この複数平行のレール機構４０ａと直交する配置に前記レール機構４０ａと同様に構成した複数のレール機構３０ａを平行、且つ、上下配置に設置し、上側の複数のレール機構３０ａ上に図１乃至図３に示す平坦な機器設置板２０を介して設置されるコンピュータ装置等の被免震体１０の免震を、上下配置の各レール機構３０ａ、４０ａにより行うようになっている。
本実施の形態の免震装置によれば、上述したように内レール３３は断面が凹形状のレール側面に円弧状曲線長孔３５を有し、また、当該内レール３３と天地を逆にした状態で組み合わせた形状が同様な外レール３２のレール側面にも円弧状曲線長孔３５を有し、これらが組み合わされ、内レール３３、外レール３２の対応配置の各円弧状曲線長孔３５間にローラ３４を水平方向に転動可能に介在することにより、内レール３３と外レール３２とは水平方向に相対移動が可能となっている。
この場合、内レール３３と外レール３２双方の円弧状曲線長孔３５の曲線の曲率により、本実施の形態の免震装置の免震動作時の固有振動数が最適に決定される。
なお、前記凹形状の外レール３２、内レール３３は、一体成形により、又は底辺、側辺を形成するための部材のボルト結合、溶接接合により形成するものである。
更に、図６に示すように、内レール３３と外レール３２の円弧状曲線長孔３５間にローラ３４が挿入されているため、免震作動時に上向き荷重が発生しても、内レール３３と外レール３２とが上下に分離することが無く、これにより浮き上がりを防止し、被免震体１０の転倒防止を図ることができる。
なお、前記レール機構３０ａ、４０ａは、図６に示す例では内レール３３が下側となっているが、これらの天地を逆にし、外レール３２が下側に位置するようにしても構わない。
更に、図１乃至図３、図８に示すように、２個のレール機構４０ａを複数のベースプレート５０上に配置し、更にこのレール機構４０ａの移動方向と直交するように、上記と同様に構成されたレール機構３０ａを上下に組み合わせ配置することにより、これら全体としてはＸ，Ｙ２次元方向に変位して被免震体１０の免震作用を発揮する。
上述した構成の他、内レール３３、外レール３２のうちの内レール３３の側辺に円弧状曲線長孔３５を形成し、外レール３２の側辺には曲率の無い水平状直線長孔を形成した構成（又はこの逆の構成）とすることもできる。この場合には内レール３３の円弧状曲線長孔３５の曲線の曲率のみによって免震装置の固有振動数が最適に決定される。
更に、図９に示すように、ベースプレート５０、レール機構３０ａ、４０ａの一部を取り外すことにより、既にケーブル類を付属させた被免震体１０を免震する構造を組み立てる場合、ケーブル類を取り外すこと無く免震装置を設置できる。また、レール機構３０ａ、４０ａは、上述した配置であるため、この免震装置内部に大きな空間６０が形成され、空間６０にケーブル類を収めることも可能となる。
図１０は本発明の実施の形態の実施例を示すものであり、この変形例においては、同図に示すように、内レール３３と、外レール３２との間に、弾性力で摩擦パッド７１を内レール３３、外レール３２の各底面に押しつける減衰手段としての摩擦ダンパ７０を配置している。
図１０の変形例構成によれば、地震等に伴う振動時において、内レール３３と外レール３２とが相対移動した際に、これらに対する減衰作用が免震装置に付加される。
前記摩擦ダンパ７０は、内レール３３、外レール３２の各底面間、又は内レール３３、外レール３２の外部に、これら内レール３３、外レール３２が相対移動した場合に減衰作用を発揮するするように取付けられる。
したがって、図１０の変形例構成は、内レール３３、外レール３２の内部に取付けた例を示すものであるが、例えば、内レール３３、外レール３２から外部に張り出し部分を設け、張り出し部分間に摩擦ダンパ７０を配置する構成とすることもできる。
また、更に別の実施例として、図１２に示すように、内レール３３と外レール３２との間にオイルダンパ９０を取り付け、内レール３３、外レール３２が地震発生に伴い相対移動する際にオイルダンパ９０による減衰作用が免震装置に付加されるように構成することもできる。
前記減衰手段としては、摩擦ダンパ７０、オイルダンパ９０、更には図示しない弾塑性ダンパ等を単独又は複数併用の形態で用いることができる。
【発明の効果】
本発明によれば、免震動作時に上向き荷重が発生しても、レール機構の浮き上がりを防止でき、また、免震装置の一部を取り外し、或いは復旧が簡単に行えるため、ケーブルを有する既存の機器に設置し免震する場合でも、ケーブルを取り外すこと無く行うことができ、更に、ケーブル類の収容もでき、更にまた、振動に対する減衰作用も発揮させることが可能な免震装置を提供できる。
【図面の簡単な説明】
【図１】本発明の実施の形態の免震装置の平面図である。
【図２】本発明の実施の形態の被免震体を設置した免震装置の正面図である。
【図３】本発明の実施の形態の被免震体を設置した免震装置の側面図である。
【図４】本発明の実施の形態の免震装置における外レールの正面図である。
【図５】本発明の実施の形態の免震装置のレール機構の正面図である。
【図６】本発明の実施の形態の免震装置のレール機構の断面図である。
【図７】本発明の実施の形態の免震装置ののレール機構移動状態を示す正面図である。
【図８】本発明の実施の形態の免震装置の平面図である。
【図９】本発明の実施の形態の免震装置の一部を取り外した状態の平面図である。
【図１０】本発明の実施の形態の免震装置の変形例を示す断面図である。
【図１１】本発明の実施の形態の免震装置の更に別の変形例を示す断面図である。
【符号の説明】
１０　　被免震体
２０　　機器設置板
３０ａ　レール機構
４０ａ　レール機構
３２　　外レール
３３　　内レール
３４　　ローラ
３５　　円弧状曲線長孔
５０　　ベースプレート
６０　　空間
７０　　摩擦ダンパ
７１　　摩擦パッド
９０　　オイルダンパTECHNICAL FIELD OF THE INVENTION
The present invention relates to a seismic isolation device, and more particularly, to a seismic isolation device that reduces a seismic force accompanying an earthquake, such as a rack on which a computer device or the like is mounted or various display cases.
[Prior art]
Conventionally, various types of seismic isolation devices of this type have been developed, those using metal springs or curved rails for restoring operation, those using oil dampers, friction dampers, etc. as vibration damping means. There is.
For example, as described in Japanese Patent Application Laid-Open No. H11-72140, there has been proposed a seismic isolation device including upper and lower narrow pressure members having concave arcuate curved surfaces and rollers.
Further, as a measure for preventing the seismic isolation device from lifting, for example, a seismic isolation device incorporating a lifting prevention device using a roller bearing described in Japanese Patent Application Laid-Open No. 2000-120776 has been proposed.
Further, Japanese Patent Application Laid-Open No. 10-149230 proposes a seismic isolation device having a cable passage through which a cable attached to a seismic isolated body is inserted.
[Problems to be solved by the invention]
However, the seismic isolation device described in, for example, Japanese Patent Laid-Open No. 11-72140, suppresses the displacement by a stopper or the like when a displacement exceeding a design value occurs in a state where a device having a high center of gravity is installed as a seismic isolated body. There is a need to. At that time, the upper and lower narrow pressure members and the roller may be lifted, and the device or the like may fall.
In order to prevent such a fall, it has been proposed to install a lift prevention device as disclosed in, for example, JP-A-2000-120776.
Further, a rack in which a computer device and the like are installed requires an attached cable and an opening for ventilation. For example, in a seismic isolation device described in Japanese Patent Application Laid-Open No. H10-149230, a device having existing cables is required. When installing a cable, it is necessary to temporarily remove cables.
The present invention has been developed in view of the above-described conventional circumstances, and can prevent floating without newly installing a floating prevention device, and does not remove a cable when existing equipment having a cable is seismically isolated. An object of the present invention is to provide a seismic isolation device that enables installation of equipment.
[Means for Solving the Problems]
In order to solve the above problem, a seismic isolation device according to the first aspect of the present invention is a seismic isolation device for reducing seismic force on a seismic isolated body in the event of an earthquake, and has a concave cross section and a base. An inner rail with an arc-shaped curved long hole with the center at the bottom along the length of the side in the arrangement corresponding to the both sides standing up from the side, and both sides standing upright from the bottom with a concave cross section An outer rail with an arc-shaped curved slot with the center at the bottom along the length direction of the side in the corresponding arrangement, and the bottom of each other arranged vertically, the arc-shaped curve length of the inner rail and the outer rail A plurality of rail mechanisms that allow the inner rail and the outer rail to move relative to each other with rolling elements interposed between the holes are arranged in parallel, and a plurality of rail mechanisms similar to the above-described rail mechanisms are arranged so as to be orthogonal to the plurality of parallel rail mechanisms. Are arranged in parallel and vertically.
According to the first aspect of the present invention, the inner rail is formed to have a concave cross section, has an arc-shaped curved long hole on the side of the rail, and has the same shape when the inner rail and the top and bottom are combined in an inverted state. The outer rail also has an arcuate curved long hole on the side of the rail.
The inner rail and the outer rail can move relative to each other in the horizontal direction by interposing rollers, which are rolling elements with a circular cross section slightly smaller than the height of these arc-shaped curved elongated holes, so that they can roll in the horizontal direction. It has become.
The natural frequency of the seismic isolation device is optimally determined by the curvatures of the arc-shaped curved slots on both the inner rail and the outer rail.
The seismic isolation of the seismic-isolated object installed on the upper plurality of rail mechanisms is performed by each of the vertically arranged rail mechanisms, and the seismic isolation operation is performed by the interposition of the rolling elements in each of the arc-shaped curved slots described above. Even if an upward load occurs sometimes, the lifting of the inner rail can be prevented, and even when existing equipment with cables is installed and seismic isolation is performed, cables can be arranged in the internal space of each vertical rail mechanism, The device can be installed without removing the cable.
The seismic isolation device according to the second aspect of the present invention is a seismic isolation device for reducing seismic force on a seismic isolated body in the event of an earthquake, wherein one of a pair of inner and outer rails has a concave cross section and stands from the bottom. An arcuate curved long hole with the center at the bottom along the length of the side is provided in the corresponding position on both sides to be installed, and the other side is concave in cross section, Horizontal straight slots along the length direction of the sides are provided, and the bottom sides of each are arranged vertically, with rolling elements interposed between the arc-shaped curved slots of the inner rail and the outer rail, and the horizontal straight slots. A plurality of rail mechanisms capable of relatively moving the rail and the outer rail are arranged in parallel, and a plurality of rail mechanisms similar to the rail mechanism are arranged vertically and vertically in an arrangement orthogonal to the plurality of parallel rail mechanisms. It is characterized by the following.
According to the second aspect of the invention, the inner rail is formed in a concave cross section, has an arc-shaped curved long hole on the side of the rail, and has the same shape when the inner rail and the top and bottom are combined in an inverted state. The outer rail has a horizontal straight hole on the side of the rail.
The inner rail and the outer rail move relative to each other in the horizontal direction by interposing rollers, which are rolling elements with a circular cross section slightly smaller than the height dimension of each of the long holes, so that they can roll in the horizontal direction in each of the long holes. Is possible.
Then, the natural frequency of the seismic isolation device is optimally determined by the curvature of the arc-shaped curved slot of one of the inner and outer rails. Other operations are the same as those of the first aspect.
According to a third aspect of the present invention, in the seismic isolation device of the first or second aspect, between the inner rail and the outer rail of the rail mechanism, a damping means selected from a friction damper, an oil damper, an elasto-plastic damper, or the like is used alone or separately. It is characterized in that a plurality of the inner rails and the outer rails are arranged so as to exert a damping action by the damping means when the inner rail and the outer rail move relative to each other.
According to the third aspect of the invention, when the inner rail and the outer rail move relative to each other due to the vibration caused by the earthquake, the vibration damping operation by the damping means is added to the seismic isolation device.
According to a fourth aspect of the present invention, in the seismic isolation device according to any one of the first to third aspects, each of the rail mechanisms is individually attachable and detachable.
According to the invention as set forth in claim 4, even when existing equipment having a cable is installed and seismic isolation is performed, each rail mechanism can be individually attached and detached, and the rail mechanism is removed and each of the vertical arrangements is removed. Since the cable can be arranged in the internal space of the rail mechanism, the device can be installed without removing the cable from the device.
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
Each of the drawings shown in FIGS. 1 to 9 shows an embodiment according to the present invention.
In the seismic isolation device of the present embodiment, the arc-shaped curved slot 35 extending in the length direction of the side (side length direction) is formed in a concave shape in cross section and arranged in correspondence with both sides standing upright from the bottom. The figure which provided the inner rail 33 provided, and the arc-shaped curved long hole 35 along the length direction of the side (side length direction) arranged corresponding to the both sides standing upright from the bottom side with a concave cross section. 4 and an outer rail 32 as shown in FIGS. 5 and 6, a roller 34 serving as a rolling element is arranged between the arcuate curved elongated holes 35 of the inner rail 33 and the outer rail 32 with the bottoms of each other arranged vertically. As shown in FIG. 7, there is provided a rail mechanism 40a that allows the inner rail 33 and the outer rail 32 to relatively move in the horizontal direction.
The roller 34 is formed in a circular cross section having a dimension slightly smaller than the dimension of the arcuate curved elongated hole 35 in the height direction.
As shown in FIGS. 2 and 3, a plurality of the rail mechanisms 40a are arranged in parallel on the base plate 50, and a plurality of rails configured similarly to the rail mechanisms 40a are arranged in an arrangement orthogonal to the plurality of parallel rail mechanisms 40a. The mechanisms 30a are installed in parallel and up and down, and the seismic isolated body 10 such as a computer device is installed on the upper plurality of rail mechanisms 30a via the flat equipment installation board 20 shown in FIGS. Is performed by the vertically arranged rail mechanisms 30a and 40a.
According to the seismic isolation device of the present embodiment, as described above, the inner rail 33 has the arc-shaped curved long hole 35 on the side surface of the rail having a concave cross section, and the inner rail 33 and the top and bottom are reversed. The outer rail 32 having a similar shape combined in the state also has an arc-shaped curved elongated hole 35 on the rail side face, and these are combined, and the inner rail 33 and the outer rail 32 are arranged in a corresponding arrangement between the arc-shaped curved elongated holes 35. The inner rail 33 and the outer rail 32 can be relatively moved in the horizontal direction by interposing the rollers 34 so as to be able to roll in the horizontal direction.
In this case, the natural frequency at the time of the seismic isolation operation of the seismic isolation device of the present embodiment is optimally determined by the curvature of the arc-shaped curved slot 35 of both the inner rail 33 and the outer rail 32.
The concave outer rail 32 and inner rail 33 are formed by integral molding or by bolting or welding members for forming the bottom and sides.
Further, as shown in FIG. 6, since the roller 34 is inserted between the arc-shaped curved slots 35 of the inner rail 33 and the outer rail 32, even if an upward load occurs during the seismic isolation operation, the inner rail 33 The outer rail 32 does not separate from the upper rail and the lower rail, so that the outer rail 32 can be prevented from floating, and the seismic isolated body 10 can be prevented from falling.
In the rail mechanisms 30a and 40a, the inner rail 33 is located on the lower side in the example shown in FIG. 6, but these may be reversed so that the outer rail 32 is located on the lower side. .
Further, as shown in FIGS. 1 to 3 and 8, two rail mechanisms 40a are arranged on a plurality of base plates 50, and the same structure as described above is arranged so as to be orthogonal to the moving direction of the rail mechanisms 40a. By arranging the combined rail mechanisms 30a vertically, the whole is displaced in the X and Y two-dimensional directions to exert the seismic isolation function of the seismic isolated body 10.
In addition to the above-described configuration, an arc-shaped curved slot 35 is formed on the side of the inner rail 33 of the inner rail 33 and the outer rail 32, and a horizontal straight slot without curvature is formed on the side of the outer rail 32. The formed configuration (or the reverse configuration) can also be used. In this case, the natural frequency of the seismic isolation device is optimally determined only by the curvature of the curved curved hole 35 of the inner rail 33.
Further, as shown in FIG. 9, when assembling a structure for seismically isolating the seismic isolated body 10 to which cables have already been attached by removing a part of the base plate 50 and the rail mechanisms 30a and 40a, the cables are removed. The seismic isolation device can be installed without the need. In addition, since the rail mechanisms 30a and 40a are arranged as described above, a large space 60 is formed inside the seismic isolation device, and it is possible to store cables and the like in the space 60.
FIG. 10 shows an embodiment of the present invention. In this modification, as shown in FIG. 10, a friction pad 71 is provided between an inner rail 33 and an outer rail 32 by an elastic force. The friction damper 70 is disposed as a damping means that presses the inner rail 33 and the outer rail 32 against the respective bottom surfaces.
According to the modification of FIG. 10, when the inner rail 33 and the outer rail 32 move relative to each other at the time of vibration due to an earthquake or the like, a damping action for these is added to the seismic isolation device.
The friction damper 70 exerts a damping effect when the inner rail 33 and the outer rail 32 relatively move between the bottom surfaces of the inner rail 33 and the outer rail 32 or outside the inner rail 33 and the outer rail 32. Mounted as
Therefore, the modified configuration of FIG. 10 shows an example in which the inner rail 33 and the outer rail 32 are attached to the inside. For example, a protruding portion is provided from the inner rail 33 and the outer rail 32 to the outside. It is also possible to adopt a configuration in which the friction damper 70 is disposed at the bottom.
As still another embodiment, as shown in FIG. 12, an oil damper 90 is attached between the inner rail 33 and the outer rail 32, and when the inner rail 33 and the outer rail 32 relatively move with the occurrence of an earthquake. The damping action of the oil damper 90 may be added to the seismic isolation device.
As the damping means, a friction damper 70, an oil damper 90, an elasto-plastic damper (not shown), or the like can be used alone or in combination of two or more.
【The invention's effect】
According to the present invention, even if an upward load occurs during the seismic isolation operation, the lifting of the rail mechanism can be prevented, and a part of the seismic isolation device can be easily removed or restored. A seismic isolation device that can be installed in a device and seismically isolated without removing cables, can accommodate cables, and can also exhibit a damping effect against vibration can be provided.
[Brief description of the drawings]
FIG. 1 is a plan view of a seismic isolation device according to an embodiment of the present invention.
FIG. 2 is a front view of the seismic isolation device in which the seismic isolated body according to the embodiment of the present invention is installed.
FIG. 3 is a side view of the seismic isolation device provided with the seismic isolated body according to the embodiment of the present invention.
FIG. 4 is a front view of an outer rail in the seismic isolation device according to the embodiment of the present invention.
FIG. 5 is a front view of a rail mechanism of the seismic isolation device according to the embodiment of the present invention.
FIG. 6 is a sectional view of a rail mechanism of the seismic isolation device according to the embodiment of the present invention.
FIG. 7 is a front view showing a rail mechanism moving state of the seismic isolation device according to the embodiment of the present invention.
FIG. 8 is a plan view of the seismic isolation device according to the embodiment of the present invention.
FIG. 9 is a plan view showing a state where a part of the seismic isolation device according to the embodiment of the present invention is removed.
FIG. 10 is a sectional view showing a modification of the seismic isolation device according to the embodiment of the present invention.
FIG. 11 is a sectional view showing still another modified example of the seismic isolation device according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Seismic isolated body 20 Equipment installation plate 30a Rail mechanism 40a Rail mechanism 32 Outer rail 33 Inner rail 34 Roller 35 Arc-shaped curved long hole 50 Base plate 60 Space 70 Friction damper 71 Friction pad 90 Oil damper

Claims

A seismic isolation device that reduces seismic force on a seismic isolated body in the event of an earthquake,
The cross-section is concave, the inner rail is provided with an arc-shaped curved slot with the center at the bottom along the length of the side in the arrangement corresponding to both sides standing from the bottom, and the cross-section is concave, An outer rail with an arc-shaped curved long hole with the center at the bottom along the length of the side in the corresponding position on both sides standing from the bottom, and an inner rail, A plurality of rail mechanisms that allow the inner rail and the outer rail to move relative to each other with rolling elements interposed between the arc-shaped curved slots of the outer rail are arranged in parallel, and the rail mechanism is arranged to be orthogonal to the plurality of parallel rail mechanisms. A plurality of rail mechanisms similar to the above are arranged in parallel and vertically.

A seismic isolation device that reduces seismic force on a seismic isolated body in the event of an earthquake,
The cross section is concave on one side of the pair of inner and outer rails, and an arc-shaped curved slot with the center at the bottom along the length direction of the side side is provided in the corresponding position on both sides standing from the bottom side, and the cross section on the other side Concave, straight horizontal slots along the length direction of the sides are provided in the corresponding positions on both sides standing from the bottom, and the bottom sides of each other are arranged vertically, and arcuate curved slots in the inner rail and outer rail A plurality of rail mechanisms that allow the inner rail and the outer rail to move relative to each other with rolling elements interposed between the horizontal straight slots are arranged in parallel with each other, and are arranged at right angles to the plurality of parallel rail mechanisms as in the rail mechanism. A seismic isolation device characterized by arranging a plurality of rail mechanisms in parallel and vertically.

Between the inner rail and the outer rail of the rail mechanism, damping means selected from a friction damper, an oil damper, an elasto-plastic damper, etc. are arranged alone or in combination, and when the inner rail and the outer rail move relatively, the damping means damps. 3. The seismic isolation device according to claim 1, wherein the seismic isolation device exerts an action.

The seismic isolation device according to any one of claims 1 to 3, wherein each of the rail mechanisms is individually attachable and detachable.