JP3806237B2 - Low-floor seismic isolation device for display cases - Google Patents

Low-floor seismic isolation device for display cases Download PDF

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Publication number
JP3806237B2
JP3806237B2 JP33172597A JP33172597A JP3806237B2 JP 3806237 B2 JP3806237 B2 JP 3806237B2 JP 33172597 A JP33172597 A JP 33172597A JP 33172597 A JP33172597 A JP 33172597A JP 3806237 B2 JP3806237 B2 JP 3806237B2
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JP
Japan
Prior art keywords
rail
seismic isolation
isolation device
low
surface 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.)
Expired - Fee Related
Application number
JP33172597A
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Japanese (ja)
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JPH11166591A (en
Inventor
浩 倉林
信行 曽根
明 松田
大輔 矢口
和彦 前林
敬二 長谷川
晴久 井上
繁行 今木
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.)
Mitsubishi Heavy Industries Ltd
Shimizu Corp
Original Assignee
Mitsubishi Heavy Industries Ltd
Shimizu Corp
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 Mitsubishi Heavy Industries Ltd, Shimizu Corp filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP33172597A priority Critical patent/JP3806237B2/en
Priority to US09/184,477 priority patent/US6092780A/en
Priority to TW087118194A priority patent/TW415992B/en
Priority to DE19851255A priority patent/DE19851255C2/en
Publication of JPH11166591A publication Critical patent/JPH11166591A/en
Application granted granted Critical
Publication of JP3806237B2 publication Critical patent/JP3806237B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Vibration Prevention Devices (AREA)
  • Freezers Or Refrigerated Showcases (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、博物館の展示品等の免震物を地震から保護するための低床型の免震装置に関するものである。
【0002】
【従来の技術】
従来の免震装置は、図7に示すように基礎上に固定された下面板1に固定されたXレール3とそのXレール3の上方で上面板2の下面に固定され、かつ前記Xレール3と直交する方向に配置されたYレール4とを連結ブロック5により連結されたものである。図示してないが免震装置と基礎の間に復元用のばねが必要である。連結ブロックは下部がボールベアリングを配してXレールを挟み上部もボールベアリングを配してYレールを挟んで中央部にユニバーサルジョイントを有して運動する構成である。免震物10はその免震装置の上に載置するのでほぼ免震装置の高さ相当量が高くなり、例えば博物館等の展示ケースを免震物の対象とするような場合には、目線の低い見学者が展示ケース内を水平の位置から観賞できないことも起こり得る。又、美観上からも展示ケースはできるだけ低くする方が良い。
【0003】
【発明が解決しようとする課題】
本発明は、新規の免震物の免震装置の製作の他に、従来の免震物に適用しても従来の高さとほぼ同一高さに設置することができる展示ケース用低床型の免震装置を提供するものである。
【0004】
【課題を解決するための手段】
上記課題を解決するための本発明の構成は、基礎上の下面板に固定され中央が低く両端が高い最低4本が2本ずつ直列してそれらが並列に配された円弧状のXレールと、前記Xレールの上方で上面板の下面に固定され前記Xレールに対し直交する方向で中央が高く両端が低い最低4本が2本ずつ直列してそれらが並列に配された円弧状のYレールと、下部はXレールを挟み上部はYレールを挟み中央に皿ばねを設けた連結ブロックと、前記Xレールと前記Yレールのそれぞれのつなぎ目に配置した緩衝器と、前記上面板に、免震物の下面に固定され下方に突出した支持脚を収容固定すべき凹部を備えたことを特徴とする展示ケース用低床型免震装置である。
また、前記連結ブロックは、前記Xレールをボールベアリングを配して挟持する下部挟持部と、前記Yレールをボールベアリングを配して挟持する上部挟持部と、該上部挟持部の中央から垂下して下部挟持部を貫通する中心軸と、該中心軸の周りに位置して下部挟持部と上部挟持部との間に介装された皿ばねと、からなるとよい。
【0005】
又、前記上面板は複数の貫通孔を有しているとよい。
【0006】
さらに、前記下面板と上面板の中央部の間に摩擦ダンパーを設けることによって他のオイルダンパー等では得られない特徴例えば小型でかつ大きな変位をしても減衰できる確実な免震装置となる。
【0007】
上記XレールとYレールとはそれぞれ少なくとも2本ずつ設けてあるが(並列)、1本を1つの円弧状レールのみで構成しても良いが、2つの円弧状レールを直列に設けても良い。そして、緩衝器は1つの円弧状レールの場合はその両端に、2つの円弧状レールを直列に設けた場合はそのつなぎ部に設けるだけでも良い。振動が発生すると連結ブロックは円弧状のレールに沿って移動するが、振動が大きい場合は連結ブロックが緩衝器に衝突して衝撃が緩和される。円弧状レールは復元作用をするので、従来の復元用のばねは不要である。
【0008】
連結ブロックは、下部がボールベアリングを配してXレールを挟み、上部もボールベアリングを配してYレールを挟んで中央部に皿ばねを設けることによって上下方向の変位を制御して水平を維持して直線運動する。又、下面板と上面板の中央部の間に摩擦ダンパーを備えることによって、振動をさらに減衰する。
【0009】
上面板に設けた凹部は免震物の下面に固定され下方に突出した免震物の支持脚を収容固定して、その凹部の深さだけ免震物の高さが低くなる。
【0010】
【発明の実施の形態】
図面に基づいて本発明の実施の形態例を説明する。
【0011】
図1は平常時の相対位置を示す正面図で、下面板1に直列に固定された2つの円弧状のXレール3に連結ブロック5の下部が係合し、Xレールのつなぎ目に緩衝器8が設けてある。一方、Yレール4は上面板2の下面にXレール3とは直交する方向に設けてあり、連結ブロック5の上部が係合している。6は上面板2に設けた凹部であって、そこに免震物10の下面に固定され下方に突出した支持脚7を収容固定している。このため免震物の設置高さが低くなる。又、別に装置の中心部には公知の摩擦ダンパー9(図6参照)が設けられている。
【0012】
図2は図1の側面図で上面板2の下面に固定された2つの円弧状のYレール4に連結ブロック5の上部が係合し、Yレール4のつなぎ目に緩衝器8が設けてある。
【0013】
図3は、図1における免震物10が振動により右方向に移動した場合の相対位置を示す。両側の連結ブロック5、5はXレール3上を右方向に移動し端部で止まり、次に中央側の左方向に戻り、又、右方向に移動するということを繰り返す。また、さらに振動が大きい場合は左側の連結ブロック5が緩衝器8に当り衝撃が緩和される。もちろん、右側の連結ブロック5が左方向に移動して緩衝器8に当り衝撃が緩和される場合もある。さらには本免震装置の中心部にセットした公知の摩擦ダンパー9(図6参照)の減衰作用もあって、有効な免震作用が生じる。
【0014】
図4は連結ブロック5を拡大して示した図で、連結ブロック5はXレール3とYレール4との間に設けられ、下部挾持部5−1がボールベアリングの介在でXレールを挟み、上部挾持部5−2もボールベアリングの介在でYレールを挟み、両者の間に上部挾持部5−2の下面に固定した中心軸5−4が直列に配列した4枚の中心を貫通している皿ばね5−3を設けてある。
【0015】
図5は緩衝器8の一例である。この緩衝器8はXレール3及びYレール4をそれぞれ直列配列した場合はつなぎ部、平列配列した場合は各端部に水平に固定する。免震物10が振動すると連結ブロック5が衝突して衝撃が緩和される。
【0016】
図6は以上の実施例の免震装置における各部品を分解して立体的に表した図である。上面板2には免震物の荷重に耐えられる範囲内で、複数の長方形(正方形、三角形他)状の貫通孔が形成され、軽量化している。
【0017】
本発明装置は、博物館等の固定用展示品ケースを載置してそのX方向、Y方向の振動に対して、円弧状のレールの作用と緩衝器および摩擦ダンパーの作用及び上下方向の変位に対しては連結ブロックの皿ばねの制御により、小振動から大きな振動まで有効に免震することができる。
【0018】
【発明の効果】
本発明は、特に博物館等の展示品ケースの免震装置として、新しい展示品ケースにも従来の展示品ケースにも適応できて、円弧状のレールにより復元作用と連結ブロックの皿ばねにより上下方向の変位を制御して免震物が水平に維持され、有効に免震すると共に、展示品ケースの高さをほとんど変えることなく免震装置を収納できる。又、上面板に複数の貫通孔を設けることにより装置の軽量化を図れる。さらに上面板と下面板の中央部に摩擦ダンパーを配置することによりさらに確実な小型化された免震装置とすることができる。
【図面の簡単な説明】
【図1】本発明のXレール側の正面図である。
【図2】本発明の側面図である。
【図3】図1に示す装置が振動により右方向に移動した状態を示す図である。
【図4】連結ブロックの拡大説明図である。
【図5】緩衝器の拡大説明図である。
【図6】本発明装置の部品の分解図である。
【図7】従来の免震装置の一例の正面図である。
【符号の説明】
1 下面板
2 上面板
3 Xレール
4 Yレール
5 連結ブロック
5−1 下部挾持部
5−2 上部挾持部
5−3 皿ばね
5−4 中心軸
6 凹部
7 支持脚
8 緩衝器
9 摩擦ダンパー
10 免震物
11 ボールベアリング
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a low-floor type seismic isolation device for protecting seismic isolation items such as museum exhibits from earthquakes.
[0002]
[Prior art]
As shown in FIG. 7, the conventional seismic isolation device includes an X rail 3 fixed to a lower surface plate 1 fixed on a foundation, and is fixed to the lower surface of the upper surface plate 2 above the X rail 3 and the X rail. 3 and a Y rail 4 arranged in a direction orthogonal to 3 are connected by a connecting block 5. Although not shown, a restoring spring is required between the base isolation device and the foundation. The connecting block has a structure in which a lower part has a ball bearing and an X rail is sandwiched, and an upper part also has a ball bearing and a Y rail is sandwiched so that a universal joint is provided at the center. Since the seismic isolation object 10 is placed on the seismic isolation device, the amount equivalent to the height of the seismic isolation device is substantially increased. For example, when the display case of a museum or the like is the target of the seismic isolation object, It is possible that a low-visited visitor cannot view the display case from a horizontal position. From the aesthetic point of view, the display case should be as low as possible.
[0003]
[Problems to be solved by the invention]
In addition to the production of a new seismic isolation device, the present invention is a low floor type display case that can be installed at the same height as the conventional height even when applied to a conventional seismic isolation device. A seismic isolation device is provided.
[0004]
[Means for Solving the Problems]
The configuration of the present invention for solving the above-mentioned problem is an arc-shaped X-rail which is fixed to the bottom plate on the foundation and is arranged in parallel with a minimum of four at the center and at least four at the ends. An arc-shaped Y that is fixed to the lower surface of the upper surface plate above the X rail and is arranged in parallel with a minimum of four in series in a direction perpendicular to the X rail and having a high center and a low end. The rail, the lower part sandwiches the X rail, the upper part sandwiches the Y rail, and the central block is provided with a disc spring, the shock absorbers arranged at the joints of the X rail and the Y rail, and the upper plate. A low-floor seismic isolation device for an exhibition case, comprising a recess to receive and fix a support leg that is fixed to the lower surface of a seismic object and protrudes downward.
The connecting block includes a lower holding portion for holding the X rail with a ball bearing, an upper holding portion for holding the Y rail with a ball bearing, and a hanging portion from the center of the upper holding portion. And a disc spring interposed between the lower clamping portion and the upper clamping portion, which is positioned around the central axis and interposed between the lower clamping portion and the upper clamping portion.
[0005]
The top plate may have a plurality of through holes.
[0006]
Further, by providing a friction damper between the bottom plate and the central portion of the top plate, a characteristic that cannot be obtained by other oil dampers, for example, a small seismic isolation device that can be damped even by a large displacement.
[0007]
Although at least two X rails and Y rails are provided (in parallel), one rail may be constituted by only one arc-shaped rail, or two arc-shaped rails may be provided in series. . The shock absorbers may be provided only at both ends in the case of one arc-shaped rail, and at the connecting portion when two arc-shaped rails are provided in series. When vibration is generated, the connecting block moves along the arc-shaped rail. However, when the vibration is large, the connecting block collides with the shock absorber and the impact is alleviated. Since the arc-shaped rail has a restoring action, a conventional restoring spring is unnecessary.
[0008]
The connecting block has a ball bearing at the bottom and the X rail is sandwiched, and the top also has a ball bearing and a disc spring at the center with the Y rail in between to control the vertical displacement and maintain the level. And move in a straight line. Further, the vibration is further damped by providing a friction damper between the bottom plate and the central portion of the top plate.
[0009]
The recess provided in the upper surface plate is fixed to the lower surface of the base isolation object and accommodates and fixes the support legs of the base isolation projecting downward, and the height of the base isolation object is lowered by the depth of the recess.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
[0011]
FIG. 1 is a front view showing a relative position in a normal state. The lower part of the connecting block 5 is engaged with two arc-shaped X rails 3 fixed in series to the lower surface plate 1, and a shock absorber 8 is connected to the joint of the X rails. Is provided. On the other hand, the Y rail 4 is provided on the lower surface of the upper surface plate 2 in a direction orthogonal to the X rail 3, and the upper portion of the connecting block 5 is engaged. Reference numeral 6 denotes a recess provided in the upper surface plate 2, which accommodates and fixes a support leg 7 that is fixed to the lower surface of the seismic isolation object 10 and protrudes downward. For this reason, the installation height of a seismic isolation object becomes low. In addition, a known friction damper 9 (see FIG. 6) is provided at the center of the apparatus.
[0012]
2 is a side view of FIG. 1, the upper part of the connecting block 5 is engaged with two arc-shaped Y rails 4 fixed to the lower surface of the upper surface plate 2, and a shock absorber 8 is provided at the joint of the Y rails 4. .
[0013]
FIG. 3 shows a relative position when the seismic isolation object 10 in FIG. 1 moves rightward due to vibration. The connecting blocks 5 and 5 on both sides move to the right on the X rail 3 and stop at the ends, and then return to the left on the center side and move to the right. In addition, when the vibration is larger, the left connecting block 5 hits the shock absorber 8 to reduce the impact. Of course, the right connection block 5 may move to the left and hit the shock absorber 8 to reduce the impact. Furthermore, there is also a damping action of a known friction damper 9 (see FIG. 6) set at the center of the seismic isolation device, so that an effective seismic isolation action occurs.
[0014]
4 is an enlarged view of the connecting block 5. The connecting block 5 is provided between the X rail 3 and the Y rail 4, and the lower gripping portion 5-1 sandwiches the X rail with a ball bearing interposed therebetween. The upper gripping part 5-2 also has a Y-rail sandwiched between ball bearings, and a central shaft 5-4 fixed on the lower surface of the upper gripping part 5-2 passes through the center of the four sheets arranged in series. The disc spring 5-3 is provided.
[0015]
FIG. 5 shows an example of the shock absorber 8. The shock absorber 8 is fixed horizontally to the connecting portion when the X rail 3 and the Y rail 4 are arranged in series, and horizontally to each end portion when arranged in parallel. When the seismic isolation object 10 vibrates, the connecting block 5 collides and the impact is alleviated.
[0016]
FIG. 6 is a three-dimensional representation of the parts of the seismic isolation device of the above embodiment disassembled. A plurality of rectangular (square, triangular, etc.) through-holes are formed in the upper surface plate 2 within a range that can withstand the load of the seismic isolation object, thereby reducing the weight.
[0017]
The device according to the present invention mounts a display case for fixing in a museum or the like, and with respect to the vibration in the X direction and the Y direction, the action of the arc-shaped rail, the action of the shock absorber and the friction damper, and the vertical displacement. On the other hand, it is possible to effectively isolate the vibration from a small vibration to a large vibration by controlling the disc spring of the connecting block.
[0018]
【The invention's effect】
The present invention can be applied to both a new display case and a conventional display case, particularly as a seismic isolation device for a display case such as a museum. The seismic isolation device is maintained horizontally by controlling the displacement of the seismic isolation, and the seismic isolation device can be stored without changing the height of the display case almost effectively. Moreover, the weight of the apparatus can be reduced by providing a plurality of through holes in the top plate. Furthermore, by arranging a friction damper in the center part of the upper surface plate and the lower surface plate, it is possible to obtain a more reliable seismic isolation device.
[Brief description of the drawings]
FIG. 1 is a front view of an X rail side of the present invention.
FIG. 2 is a side view of the present invention.
FIG. 3 is a diagram illustrating a state where the apparatus illustrated in FIG. 1 is moved rightward by vibration.
FIG. 4 is an enlarged explanatory diagram of a connection block.
FIG. 5 is an enlarged explanatory view of a shock absorber.
FIG. 6 is an exploded view of parts of the device of the present invention.
FIG. 7 is a front view of an example of a conventional seismic isolation device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lower surface plate 2 Upper surface plate 3 X rail 4 Y rail 5 Connection block 5-1 Lower clamping part 5-2 Upper clamping part 5-3 Belleville spring 5-4 Center axis 6 Recess 7 Support leg 8 Shock absorber 9 Friction damper 10 Seismic object 11 Ball bearing

Claims (4)

基礎上の下面板に固定され中央が低く両端が高い最低4本が2本ずつ直列してそれらが並列に配された円弧状のXレールと、前記Xレールの上方で上面板の下面に固定され前記Xレールに対し直交する方向で中央が高く両端が低い最低4本が2本ずつ直列してそれらが並列に配された円弧状のYレールと、下部はXレールを挟み上部はYレールを挟み中央に皿ばねを設けた連結ブロックと、前記Xレールと前記Yレールのそれぞれのつなぎ目に配置した緩衝器と、前記上面板に、免震物の下面に固定され下方に突出した支持脚を収容固定すべき凹部を備えたことを特徴とする展示ケース用低床型免震装置。 An arc-shaped X-rail that is fixed to the bottom plate on the foundation and that has at least four in the middle and low at both ends in series, and is arranged in parallel, and fixed to the lower surface of the top plate above the X-rail An arc-shaped Y-rail in which at least four in the direction perpendicular to the X-rail are high in the center and low at both ends are arranged in series and arranged in parallel , the lower part sandwiches the X-rail, and the upper part is the Y-rail A connecting block provided with a disc spring in the center, a shock absorber disposed at each joint of the X rail and the Y rail, and a support leg fixed to the lower surface of the seismic isolation object and projecting downward to the upper surface plate A low-floor seismic isolation device for display cases, characterized in that it has a recess to accommodate and fix. 前記連結ブロックは、前記Xレールをボールベアリングを配して挟持する下部挟持部と、前記Yレールをボールベアリングを配して挟持する上部挟持部と、該上部挟持部の中央から垂下して下部挟持部を貫通する中心軸と、該中心軸の周りに位置して下部挟持部と上部挟持部との間に介装された皿ばねと、からなる請求項1に記載の展示ケース用低床型免震装置。  The connecting block includes a lower holding part for holding the X rail with a ball bearing, an upper holding part for holding the Y rail with a ball bearing, and a lower part hanging from the center of the upper holding part. The low floor for an exhibition case according to claim 1, comprising a central axis that penetrates the clamping part, and a disc spring that is located around the central axis and is interposed between the lower clamping part and the upper clamping part. Type seismic isolation device. 前記上面板が複数の貫通孔を有している請求項1又は2に記載の展示ケース用低床型免震装置。  The low floor type seismic isolation device for display cases according to claim 1 or 2, wherein the upper surface plate has a plurality of through holes. 前記上面板と前記下面板の中央部に摩擦ダンパーを配置してなる請求項1,2又は3に記載の展示ケース用低床型免震装置。  The low floor type seismic isolation device for an exhibition case according to claim 1, 2, or 3, wherein a friction damper is disposed at a central portion of the upper surface plate and the lower surface plate.
JP33172597A 1997-12-02 1997-12-02 Low-floor seismic isolation device for display cases Expired - Fee Related JP3806237B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP33172597A JP3806237B2 (en) 1997-12-02 1997-12-02 Low-floor seismic isolation device for display cases
US09/184,477 US6092780A (en) 1997-12-02 1998-11-02 Low-bed type seismic isolator for display case
TW087118194A TW415992B (en) 1997-12-02 1998-11-02 Low-bed type semismic isolator for display case
DE19851255A DE19851255C2 (en) 1997-12-02 1998-11-06 Flat bed type seismic isolator, especially for a showcase

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33172597A JP3806237B2 (en) 1997-12-02 1997-12-02 Low-floor seismic isolation device for display cases

Publications (2)

Publication Number Publication Date
JPH11166591A JPH11166591A (en) 1999-06-22
JP3806237B2 true JP3806237B2 (en) 2006-08-09

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JP2005201287A (en) * 2004-01-13 2005-07-28 Nachi Fujikoshi Corp Seismic isolation device
KR101068508B1 (en) * 2009-05-18 2011-09-28 (주)티에이치엔 Chamber in which jig is installed
CN102625606A (en) * 2011-01-28 2012-08-01 鸿富锦精密工业(深圳)有限公司 Container data center
CN106136608A (en) * 2016-07-31 2016-11-23 合肥柏隆科技发展有限公司 A kind of based on moistureproof multifunction wardrobe
CN109090929B (en) * 2018-10-29 2023-11-03 西南科技大学 Composite shock insulation device

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