JP3401388B2

JP3401388B2 - Seismic isolation table

Info

Publication number: JP3401388B2
Application number: JP17174996A
Authority: JP
Inventors: 邦彦安藤; 幸雄佐藤; 将大塚; 邦夫早川; 哲郎辰浜; 章井手
Original assignee: Okumura Corp
Current assignee: Okumura Corp
Priority date: 1996-06-10
Filing date: 1996-06-10
Publication date: 2003-04-28
Anticipated expiration: 2016-06-10
Also published as: JPH09327345A

Description

Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は主として、室内に展
示される美術品や美術品を収めている展示ケースを地震
災害から守るための免震台に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a seismic isolation stand for protecting an art work exhibited in a room or an exhibition case containing the art work from an earthquake disaster.

【０００２】[0002]

【従来の技術】美術館や博物館或いは寺院等の建物内に
は発掘された文化遺産や仏像、彫刻品等の美術品などを
展示した多数の展示台や展示ケースが設置されている
が、従来からこれらの展示台や展示ケースは室内の床面
上に直接設置されているために、地震が発生すると展示
台や展示ケースが倒壊して美術品などの展示品が破損或
いは損傷し、取返しのつかない甚大な損害を被ることに
なる。このため、設置面と展示台或いは展示ケースとの
間にネオプレンゴムなどの弾性体を介在させてその剪断
変形により震動エネルギーを吸収、減衰させるように構
成した免震装置や、偏心ローラを介在させてその偏心に
よる転動抵抗力を利用して震動エネルギーを吸収、減衰
させるように構成した免震装置が開発されている。[Prior Art] A large number of display stands and display cases for excavating cultural heritage, Buddhist statues, art objects such as sculptures, etc. have been installed in buildings such as museums, temples, etc. Since these display stands and display cases are installed directly on the floor surface in the room, when an earthquake occurs, the display stands and display cases will collapse, damaging or damaging exhibits such as works of art, and making them irreversible. You will not suffer enormous damage. For this reason, an elastic body such as neoprene rubber is interposed between the installation surface and the display stand or display case, and a seismic isolation device or an eccentric roller configured to absorb and attenuate the vibration energy by shearing deformation is interposed. A seismic isolation device has been developed which is configured to absorb and attenuate the vibration energy by utilizing the rolling resistance force due to its eccentricity.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、上記い
ずれの免震装置においても、この装置を備えた台板上に
美術品などの展示ケースを載置しただけでは、展示中に
見学者等が展示ケースを押した場合、地震が発生してい
ないにもかかわらず免震装置が作動して展示ケースが揺
動し、展示品が倒れたり、展示ケースが倒壊する虞れが
ある。このため、展示ケースの載置面に展示ケースに対
して着脱するソレノイドを利用した着脱手段を配設して
おき、通常時には該着脱手段によって展示ケースを固定
し、地震発生時には震動感知器によって着脱手段を作動
させて展示ケースに対する固定を解除するように構成し
ておくことが考えられる。However, in any of the above-described seismic isolation devices, if a display case for art works or the like is simply placed on the base plate equipped with this device, a visitor or the like can display it during the exhibition. When the case is pushed, there is a possibility that the seismic isolation device will operate and the display case will swing, and the display item will collapse or the display case will collapse even though no earthquake has occurred. Therefore, a mounting / dismounting means using a solenoid for mounting / dismounting with respect to the display case is provided on the mounting surface of the display case, the display case is normally fixed by the mounting / demounting means, and is mounted / dismounted by a vibration sensor when an earthquake occurs. It is conceivable that the means is activated to release the fixing to the display case.

【０００４】上記のような着脱手段を免震装置と共に配
設しておくと、通常時には免震装置を作動させることな
く展示ケースを固定させておくことができるが、着脱手
段は通電しておくことによって展示ケースを固定状態に
維持するように構成しているため、このような通電中に
おいて地震が発生した時に震動感知器によってその固定
状態を解き且つその開放状態に維持させるには、震動感
知器によって停電状態にしなければならない。そうする
と、地震が発生していないにもかかわらず、停電時には
着脱手段による免震装置の固定が解かれ且つ震動感知器
が作動した状態となって停電が復旧すればその開放状態
を維持することになり、展示ケースを不測に押した場合
には展示ケースが揺動して上述したような問題点が生じ
ることになる。If the attaching / detaching means as described above is provided together with the seismic isolation device, the display case can be fixed without operating the seismic isolation device under normal circumstances, but the attaching / detaching means is energized. Since the display case is configured to be kept in a fixed state by means of this, in order to release the fixed state with the seismic detector and maintain it in the open state when an earthquake occurs during such energization, It has to be put into a power failure state by a container. Then, even if no earthquake has occurred, the seismic isolation device will be unfixed by the attachment / detachment means during a power failure, and the seismic sensor will be activated, and if the power failure is restored, the open state will be maintained. If the display case is pushed unexpectedly, the display case swings and the above-mentioned problems occur.

【０００５】なお、上記着脱手段としてソレノイドの可
動鉄心を可動ピンとし、この可動ピンを展示ケース側に
設けた係止孔に係脱させるように構成したものを採用し
た場合には、可動ピンと係止孔間の隙間によって展示ケ
ースにガタツキが生じる虞れがあると共に係止孔の位置
でしかロックさせることができず、その上、地震発生時
に係止孔からの可動ピンの抜け出しが遅れた場合、可動
ピンに屈曲して係止孔から離脱させることができなくな
るばかりでなく、免震装置の機能を発揮させることがで
きないことになる。さらに、地震がおさまった後に再び
ロックさせるには可動ピンと係止孔とを上下方向に連通
するように合致させた状態にしなければならず、そのロ
ック操作が困難であるという問題点を有する。If the movable iron core of the solenoid is a movable pin and the movable pin is engaged with and disengaged from a locking hole provided on the display case side as the attaching / detaching means, when the movable pin is engaged with the movable pin. There is a risk of rattling in the display case due to the gap between the stop holes, and it can only be locked at the position of the lock hole, and further, when the movable pin is delayed from coming out of the lock hole when an earthquake occurs. Not only can the movable pin be bent and cannot be disengaged from the locking hole, but also the function of the seismic isolation device cannot be exerted. Furthermore, in order to lock again after the earthquake has subsided, the movable pin and the locking hole must be in a state of being aligned so as to communicate with each other in the vertical direction, and there is a problem that the locking operation is difficult.

【０００６】また、上記免震装置として、ネオプレンな
どの弾性体を採用した場合、小さな地震発生時には水平
変位量が小さいので、このような弾性体でも震動エネル
ギーを低減させることができるが、水平変位量が30cmに
も達する大地震の場合には上記弾性体ではその方向の震
動エネルギーを吸収することができず、地震波の殆どが
弾性体を介して展示品や展示ケースに伝達され、展示品
や展示ケース全体が転倒して大きな損害が発生するとい
う問題点がある。本発明はこのような問題点を全面的に
解消し得る免震台の提供を目的とするものである。When an elastic body such as neoprene is used as the seismic isolation device, the amount of horizontal displacement is small when a small earthquake occurs. Therefore, even with such an elastic body, the vibration energy can be reduced. In the case of a large earthquake with a volume of up to 30 cm, the elastic body cannot absorb the vibration energy in that direction, and most of the seismic waves are transmitted to the exhibit or display case through the elastic body, There is a problem in that the entire display case falls over and serious damage occurs. An object of the present invention is to provide a seismic isolation table which can completely eliminate such problems.

【０００７】[0007]

【課題を解決するための手段】上記目的を達成するため
に本発明の免震台は、設置面に固定する下部台枠上に免
震機構を介して前後左右いずれかの方向に揺動可能に載
置された中間台枠と、この中間台枠上に免震機構を介し
て上記揺動方向と直交する方向に揺動可能に載置された
上部台枠と、上記下部台枠と中間台枠間および中間台枠
と上部台枠間をそれぞれ連結固定し且つその連結固定を
解除可能にする電動着脱機構と、所定以上の震動の発生
により作動する震動感知器とからなる免震台であって、
上記電動着脱機構は、一対の挟圧パッドを備えた電動グ
リッパと、この電動グリッパの挟圧パッド間に介在させ
る制動プレートとからなり、上記上下に対向する台枠の
いずれか一方の台枠に電動グリッパをその挟圧パッドの
対向面間を揺動方向に向けた状態で固着し、他方の台枠
に制動プレートをその長さ方向を台枠の揺動方向に向け
た状態で固定して、上記電動グリッパが通電された状態
においては挟圧パッドにより上記制動プレートを挟着し
て下部台枠と中間台枠および上部台枠を連結固定させて
おく一方、上記震動感知器が所定以上の震動を感知した
時には上記電動グリッパを絶電させて台枠間の連結固定
を開放させるように構成している。In order to achieve the above object, the seismic isolation base of the present invention can be swung in any of front, rear, left and right directions via a seismic isolation mechanism on a lower underframe fixed to an installation surface. An intermediate underframe mounted on the intermediate underframe, an upper underframe mounted on the intermediate underframe via a seismic isolation mechanism so as to be swingable in a direction orthogonal to the above swinging direction, and an intermediate between the lower underframe. An electric attachment / detachment mechanism that connects and fixes the underframes and the intermediate underframe and the upper underframe to each other, and the occurrence of vibrations above a certain level
A seismic isolation stand consisting of a seismic sensor operated by
The electric attachment / detachment mechanism is an electric grab equipped with a pair of clamping pads.
Insert it between the ripper and the pressure pad of this electric gripper.
It consists of a brake plate that
Attach an electric gripper to one of the underframes of the clamping pad.
Secure with the facing surfaces facing in the swing direction, and secure the other underframe
The braking plate to the length direction of the underframe.
Fixed with the electric gripper energized
In the case of the
Connect the lower underframe, middle underframe and upper underframe
On the other hand, when the vibration sensor detects a vibration above a predetermined level, the electric gripper is de-energized and the frame is connected and fixed.
Is configured to be opened .

【０００８】上記構造の免震台において、免震機構は請
求項２に記載したように、互いに偏心したローラを一体
に設けてなり、この免震機構を上下に対向する台枠間の
数個所に介在させて中心が他方のローラの中心よりも上
側にある一方のローラを下側台枠側に接して転動させる
ようにすると共に中心が一方のローラの中心よりも下側
にある他方のローラを上側台枠側に接して転動させるよ
うにし、且つ下部台枠と中間台枠との間に設けた免震機
構のローラ転動方向と中間台枠と上部台枠との間に設け
た免震機構のローラ転動方向とが直交する方向に配設し
てなるものである。In the base isolation table having the above structure, the base isolation mechanism is a contractor.
As described in claim 2 , eccentric rollers are integrally provided, and the seismic isolation mechanism is provided at several places between vertically opposed underframes so that the center is located above the center of the other roller. One roller is brought into contact with the lower underframe side to be rolled, and the other roller whose center is lower than the center of one roller is brought into contact with the upper underframe side to be rolled, In addition, the roller rolling direction of the seismic isolation mechanism provided between the lower underframe and the intermediate underframe is orthogonal to the roller rolling direction of the seismic isolation mechanism provided between the intermediate underframe and the upper underframe. It is arranged.

【０００９】上記のように構成した免震台は、その上部
台枠上に美術品等の展示品を載置させて展示台として使
用するか、或いは上部台枠上に展示品を収納した展示ケ
ースを設置させるように構成している。The seismic isolation stand configured as described above is used as an exhibition stand by placing an exhibit such as an art work on the upper frame thereof, or an exhibition containing the exhibited product on the upper frame. The case is configured to be installed.

【００１０】[0010]

【作用】免震台は、下部台枠と中間台枠および上部台枠
とを互いに水平面上で直交する方向に免震機構を介して
揺動可能に積載してなる構造を有し、上下に対向する台
枠同士は通常時には電動着脱機構によって連結固定して
おくように構成されている。一方、下部台枠又は別な適
宜場所には震動感知器が配設されてあり、この震動感知
器と電動着脱機構とは電気的に接続している。この免震
台の上部台枠上に展示ケースを載せて固定したのち、電
動着脱機構に通電すると電動着脱機構が作動して上下台
枠間を連結固定した状態となり、展示ケースに不測の押
圧力等が作用しても免震台は揺動することはない。[Operation] The seismic isolation base has a structure in which a lower base frame, an intermediate base frame and an upper base frame are swingably stacked in a direction orthogonal to each other on a horizontal plane through a seismic isolation mechanism, The underframes facing each other are normally connected and fixed by an electric attachment / detachment mechanism. On the other hand, a vibration sensor is disposed on the lower underframe or another appropriate place, and the vibration sensor and the electric attachment / detachment mechanism are electrically connected. After mounting and fixing the display case on the upper frame of this base isolation table, when the electric attachment / detachment mechanism is energized, the electric attachment / detachment mechanism operates and the upper and lower base frames are connected and fixed, resulting in an unexpected pressing force on the display case. The seismic isolation base does not rock even when the above acts.

【００１１】展示中において停電すると、電動着脱機構
に電流が流れなくなり、上下台枠間の連結固定を解除す
るが、停電が復旧すると電動着脱機構が通電状態となっ
て自動的に作動し、再び、上下台枠間を連結固定する。
次に、地震が発生して震動感知器が所定以上の揺れを感
知すると、電動着脱機構が作動して台枠間の連結固定を
解除すると共にその解除状態を維持し、免震台の免震機
構によって震動を吸収しながら減衰した震動波を展示ケ
ースに伝達し、展示品の揺れを抑制するものである。地
震がおさまれば震動感知器を作動が可能な元の状態に復
帰させる。If a power failure occurs during the exhibition, the electric attachment / detachment mechanism will no longer flow current, and the connection / fixation between the upper and lower frames will be released. , Connect and fix the upper and lower frames.
Next, when an earthquake occurs and the vibration detector detects more than a predetermined amount of sway, the electric attachment / detachment mechanism operates to release the connection and fixation between the underframes and maintain the released state. The mechanism absorbs the vibrations and transmits the damped vibrations to the display case to suppress the shaking of the exhibits. When the earthquake subsides, the seismic detector is restored to its original operational state.

【００１２】上記電動着脱機構として上下台枠のいずれ
か一方に装着する電動グリッパと、この電動グリッパの
一対の挟持パッド間に介挿した状態で他方の台枠に装着
する制動プレートとより構成しているので、通常時には
一対の挟持パッドによって制動プレートを挟着して上下
台枠間をガタツキが生じることなく強固に連結固定させ
ておくことができると共にその連結固定位置を制動プレ
ートの所定の部位に簡単且つ正確に設定し得るものであ
り、さらに、地震発生時には一対の挟持パッドが離間す
る方向に作動して制動プレートに対する挟着が確実に解
かれ、上下台枠の水平方向の相対揺動によって電動グリ
ッパの一対の挟持パッドが制動プレートの長さ方向に沿
って相対移動する。As the electric attachment / detachment mechanism, an electric gripper attached to either one of the upper and lower underframes and a braking plate attached to the other underframe in a state of being interposed between a pair of holding pads of the electric gripper. Therefore , the braking plate is normally sandwiched by a pair of sandwiching pads so that the upper and lower underframes can be firmly connected and fixed without rattling, and the connecting and fixing position is set at a predetermined portion of the braking plate. Can be set easily and accurately, and when an earthquake occurs, the pair of holding pads act in the direction of separating them to securely release the holding to the braking plate, and the relative swinging of the upper and lower underframes in the horizontal direction. The pair of holding pads of the electric gripper relatively moves along the length direction of the braking plate.

【００１３】また、上記免震機構として、互いに偏心し
たローラを一体に設けてなり、この免震機構を上下に対
向する台枠間の数個所に介在させて中心が他方のローラ
の中心よりも上側にある一方のローラを下側台枠側に接
して転動させるようにすると共に中心が一方のローラの
中心よりも下側にある他方のローラを上側台枠側に接し
て転動させるように構成しておけば、常態においてはこ
れらのローラは展示ケース側からの荷重により、その中
心を垂直線上で対向させた状態にして中心が上側にある
ローラの下周面を下側台枠上に受止させる一方、中心が
下側にあるローラの上周面で上側台枠の下面を受止させ
て展示ケース側の荷重を安定的に支持している。Further, as the seismic isolation mechanism, eccentric rollers are integrally provided, and the seismic isolation mechanism is interposed at several points between vertically opposed underframes so that the center of the seismic isolation mechanism is higher than the center of the other roller. One roller on the upper side should come into contact with the lower underframe to be rolled, and the other roller whose center is below the center of one roller should be brought into contact with the upper underframe to roll. Under normal conditions, these rollers are placed in a state where their centers face each other on a vertical line due to the load from the side of the display case, and the lower peripheral surface of the rollers whose center is on the upper side is on the lower underframe. On the other hand, the lower surface of the roller, whose center is on the lower side, receives the lower surface of the upper frame to stably support the load on the display case side.

【００１４】そして、地震の発生により設置面が水平方
向に振動すると、設置面と一体の下部台枠が同一方向に
揺動するが、該下部台枠上のローラは下部台枠に対して
相対的に反対方向に転動する。この転動によって互いに
中心が上下に偏心したこれらのローラはその中心間の水
平距離が転動角度に比例して大きくなって転動を阻止し
ようとする抵抗力が大きくなる。従って、この抵抗力に
よってローラがある程度転動した後、停止し、これらの
ローラで支持されている展示ケースが下部台枠の水平移
動に対して時間的な遅れでもって同一方向に水平移動す
ることになる。When the installation surface vibrates in the horizontal direction due to the occurrence of an earthquake, the lower underframe integrated with the installation surface swings in the same direction, but the rollers on the lower underframe move relative to the lower underframe. Roll in the opposite direction. Due to this rolling, these rollers, whose centers are eccentric to each other in the vertical direction, have a large horizontal distance between the centers thereof in proportion to the rolling angle, so that the resistance force for preventing the rolling is increased. Therefore, after the rollers roll to some extent due to this resistance force, they stop and the exhibition case supported by these rollers moves horizontally in the same direction with a time delay with respect to the horizontal movement of the lower frame. become.

【００１５】さらに、展示ケースの水平移動途上におい
て、免震台の下部台枠が地震の往復振動によって反対方
向に水平移動し、その方向の移動によってローラは上記
とは反対方向に転動して逆方向の抵抗力が発生し、従っ
て、展示ケースが下部台枠の水平移動量よりも極めて小
さい水平移動を行ったのち下部台枠の移動に周期的な遅
れでもって逆方向に水平移動を行うことになる。即ち、
水平方向の震動を互いに偏心したローラを介して吸収し
ながら減衰した震動波を展示ケースに伝達し、展示品の
揺れを抑制するものである。Further, during the horizontal movement of the display case, the lower frame of the base isolation table horizontally moves in the opposite direction due to the reciprocating vibration of the earthquake, and the movement in that direction causes the rollers to roll in the opposite direction. A resistance force is generated in the opposite direction. Therefore, the exhibition case moves horizontally less than the horizontal movement amount of the lower underframe, and then horizontally in the opposite direction with a periodic delay in the movement of the lower underframe. It will be. That is,
It absorbs horizontal vibrations through rollers that are eccentric to each other and transmits the damped vibration waves to the display case to suppress the shaking of the exhibits.

【００１６】[0016]

【発明の実施の形態】次に、本発明の具体的な実施例を
図面について説明すると、図１において、免震台は、下
部台枠１と中間台枠２と上部台枠３とを順次間隔を存し
て積載状態に配設していると共に下部台枠１と中間台枠
２との間、及び中間台枠２と上部台枠３との間に免震機
構４を介在させ、さらに、下部台枠１と中間台枠２との
対向面と、中間台枠２と上部台枠３との対向面とにこれ
ら上下に対向する台枠間を連結固定し且つその連結固定
を開放可能にした電動着脱機構５を配設していると共に
下部台枠１の適所に図２に示すように震動感知器６を取
付けてなるものである。７は下部台枠１に装着している
トリガー機構制御盤である。なお、震動感知器６は下部
台枠１以外に建物の適所に取付けておいてもよいが、電
気的配線の都合上などにより建物の床面上に一体に固定
される上記下部台枠１に取付けておくことが望ましい。BEST MODE FOR CARRYING OUT THE INVENTION Next, a concrete embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a seismic isolation base comprises a lower underframe 1, an intermediate underframe 2, and an upper underframe 3 in that order. The seismic isolation mechanism 4 is disposed between the lower underframe 1 and the intermediate underframe 2 and between the intermediate underframe 2 and the upper underframe 3 while being arranged in a stacked state with a space therebetween. The upper and lower underframes can be connected and fixed to the facing surfaces of the lower underframe 1 and the intermediate underframe 2 and the facing surfaces of the intermediate underframe 2 and the upper underframe 3 and the connecting and fixing can be opened. The electric attachment / detachment mechanism 5 described above is provided and a vibration sensor 6 is attached to an appropriate position of the lower underframe 1 as shown in FIG. Reference numeral 7 is a trigger mechanism control panel mounted on the lower underframe 1. The vibration sensor 6 may be attached to a proper place of the building other than the lower underframe 1, but it is fixed to the lower underframe 1 which is integrally fixed on the floor of the building due to electric wiring. It is desirable to have it installed.

【００１７】下部台枠１は図２に示すように、平面矩形
状の外装枠部10の両側枠部間の前後部に互いに平行な横
長長方形状の繋ぎ材11、12を固着し、さらに、外装枠部
10の前後枠部の両側部間に溝形鋼材からなる免震機構取
付枠材13、14を互いに平行にして固着してなるものであ
る。これらの取付枠材13、14と上記前後繋ぎ材11、12と
は外装枠部10の四隅部で直交に交差しているが、その交
差部における繋ぎ材11、12を取付枠材13、14の幅だけ切
除し、その切除部15に取付枠材13、14の交差部を介在さ
せて一体に固着している。従って、前後繋ぎ材11、12と
取付枠材13、14とは略同一高さ位置に配設され、免震台
の厚みをできるだけ薄くなるように構成している。As shown in FIG. 2, the lower underframe 1 has horizontally extending rectangular connecting members 11 and 12 which are parallel to each other fixed to the front and rear portions between both side frame portions of a planar rectangular outer frame portion 10. Exterior frame part
The seismic isolation mechanism mounting frame members 13 and 14 made of channel steel are fixed in parallel to each other between both sides of the front and rear frame members. These attachment frame members 13 and 14 and the front and rear connecting members 11 and 12 intersect at four corners of the exterior frame portion 10 at right angles, and the connecting members 11 and 12 at the intersections are attached to the attachment frame members 13 and 14. The width is cut, and the cutout portion 15 is integrally fixed with the intersection of the mounting frame members 13 and 14 interposed. Therefore, the front and rear connecting members 11 and 12 and the mounting frame members 13 and 14 are arranged at substantially the same height position, and the seismic isolation table is configured to be as thin as possible.

【００１８】中間台枠２は図３に示すように、上記下部
台枠１の外装枠部10と同一大きさの矩形状外装枠部20の
前後枠部間の両側部に上記下部台枠１の取付枠材13、14
の上方に夫々対向させて互いに平行な縦長長方形状の溝
形鋼材からなる免震機構取付枠材21、22を固着し、さら
に、これらの取付枠材21、22上に直交に交差させるよう
にして周囲枠20の両側枠部間の前後部に横長長方形状の
免震機構取付枠材23、24を互いに平行にして固着してな
るものである。そして、上記下部台枠１の両側取付枠材
13、14は断面上向きコ字状に形成されている一方、中間
台枠２の両側取付枠材21、22は断面下向きコ字状に形成
されていて、図１に示すように上下に平行に対向した取
付枠材13と21、及び取付枠材14と22とは夫々の溝の開口
側を対向させてある。As shown in FIG. 3, the intermediate underframe 2 has the lower underframe 1 on both sides between the front and rear frames of a rectangular outer frame 20 having the same size as the outer frame 10 of the lower underframe 1. Mounting frame material 13, 14
The seismic isolation mechanism mounting frame members 21 and 22 made of vertically elongated rectangular channel steels, which are parallel to each other and are opposed to each other, are fixed to each other, and the mounting frame members 21 and 22 are crossed at right angles. The laterally elongated rectangular seismic isolation mechanism mounting frame members 23 and 24 are fixed in parallel to each other at the front and rear portions between both side frame portions of the peripheral frame 20. And, both side mounting frame material of the lower underframe 1
13 and 14 are formed in an upward U-shaped cross section, while the mounting frame members 21 and 22 on both sides of the intermediate underframe 2 are formed in a downward U-shaped cross section, and are parallel to each other vertically as shown in FIG. The mounting frame members 13 and 21 and the mounting frame members 14 and 22 which face each other face each other on the opening sides of the respective grooves.

【００１９】上部台枠３は図４に示すように、上記下部
台枠１と中間台枠２の外装枠部10、20と同一大きさの矩
形状外装枠部30の前後枠部間の両側部に互いに平行な縦
長長方形状の繋ぎ材31、32を固着し、さらに、外装枠部
30の前後枠部の両側部間に溝形鋼材からなる免震機構取
付枠材33、34を互いに平行にして固着してなるものであ
る。これらの取付枠材33、34と上記両側繋ぎ材31、32と
は上記下部台枠１と同様に、外装枠部30の四隅部で直交
に交差しているが、その交差部における繋ぎ材31、32を
取付枠材33、34の幅だけ切除し、その切除部35に取付枠
材33、34の交差部を介在させて一体に固着している。そ
して、前後取付枠材33、34は断面下向きコ字状に形成さ
れていて、上記中間台枠２の断面上向きコ字状に形成さ
れた前後取付枠材23、24とは互いに上下に平行に配設さ
れて夫々の溝の開口側を対向させている。The upper underframe 3 is, as shown in FIG. 4, both sides between the front and rear frame parts of a rectangular outer frame part 30 having the same size as the outer frame parts 10, 20 of the lower underframe 1 and the intermediate underframe 2. Longitudinal rectangular connecting members 31 and 32 parallel to each other are fixed to the section, and the exterior frame
Seismic isolation mechanism mounting frame members 33 and 34 made of channel steel are fixed in parallel to each other between both sides of the front and rear frame portions of 30. Similar to the lower underframe 1, the mounting frame members 33 and 34 and the both-side connecting members 31 and 32 intersect at four corners of the exterior frame portion 30 at right angles, but the connecting members 31 at the intersecting portions. , 32 are cut by the width of the mounting frame members 33, 34, and the cut portions 35 are integrally fixed with the intersections of the mounting frame members 33, 34 interposed. The front and rear mounting frame members 33 and 34 are formed in a U-shape in a downward cross section, and the front and rear mounting frame members 23 and 24 formed in a U-shaped cross section in the intermediate underframe 2 are parallel to each other in the vertical direction. The grooves are arranged so that the opening sides of the respective grooves face each other.

【００２０】免震機構４は図５〜図７に示すように、対
向面が互いに平行なラック付上下ガイド部材40、41間に
円形の大小径ローラ42、43と大小径ピニオン44、45とを
介在させてなるものである。詳しくは、上側ガイド部材
40の下面中央部に全長に亘って浅底の溝46を刻設してい
ると共に該上側ガイド部材40の一側端部の下面にラック
47を全長に亘って一体に設けている。一方、下側ガイド
部材41の上面中央部に全長に亘って深底の溝48を刻設す
ると共にその他側端部の上面にラック49を一体に設けて
いる。As shown in FIGS. 5 to 7, the seismic isolation mechanism 4 includes circular large and small diameter rollers 42 and 43 and large and small diameter pinions 44 and 45 between rack upper and lower guide members 40 and 41 whose opposing surfaces are parallel to each other. Is intervening. Specifically, the upper guide member
A groove 46 having a shallow bottom is engraved in the central portion of the lower surface of 40 over the entire length, and a rack is formed on the lower surface of one end of the upper guide member 40.
47 is integrated over the entire length. On the other hand, a deep-bottomed groove 48 is formed over the entire length in the center of the upper surface of the lower guide member 41, and a rack 49 is integrally provided on the upper surface of the other side end.

【００２１】さらに、大径ローラ42の両側面に小径ロー
ラ43、43を大径ローラ42の中心に対してその中心を偏心
させた状態で且つ小径ローラ43、43の外周面から大径ロ
ーラ42の外周面を突出させた状態で一体に設けてあり、
また、一側方の小径ローラ43に小径ローラ43と偏心させ
て大径ローラ42と同一径の大径ピニオン44を一体に設け
ていると共に他側方の小径ローラ43にこれらの小径ロー
ラ43と同一径の小径ピニオン45を一体に設けている。大
径ローラ42と大径ピニオン44との中心は同一回転中心軸
線上にあり、同様に小径ローラ43、43と小径ピニオン45
との中心は同一回転中心軸線上に設けられている。な
お、上下ガイド部材40、41は上記溝形鋼材よりなる取付
枠材の溝幅よりも幅狭く且つ取付枠材よりも短尺の角棒
材より形成されている。Further, the small-diameter rollers 43, 43 on both side surfaces of the large-diameter roller 42 are eccentric with respect to the center of the large-diameter roller 42, and the large-diameter rollers 42 from the outer peripheral surfaces of the small-diameter rollers 43, 43. It is provided integrally with the outer peripheral surface of the
Further, a large diameter pinion 44 having the same diameter as the large diameter roller 42 is provided integrally with the small diameter roller 43 on one side so as to be eccentric with the small diameter roller 43, and the small diameter roller 43 is provided on the other side small diameter roller 43. The small diameter pinion 45 having the same diameter is integrally provided. The centers of the large diameter roller 42 and the large diameter pinion 44 are on the same rotation center axis line, and similarly, the small diameter rollers 43, 43 and the small diameter pinion 45 are the same.
The centers of and are provided on the same rotation center axis. The upper and lower guide members 40, 41 are formed of square bar members having a width narrower than the groove width of the mounting frame member made of the channel steel and shorter than the mounting frame member.

【００２２】そして、小径ローラ43は上側ガイド部材40
に接することなく下側ガイド部材41の上面を転動し、大
径ローラ42は上下ガイド部材40、41の溝46、48内にその
外周部を没入させて下側の溝48に接することなく常時上
側の溝46の底面に接した状態で転動する。一方、小径ピ
ニオン45は上側ガイド部材40に接することなく下側ガイ
ド部材41のラック49に噛合しながら転動し、大径ピニオ
ン44は下側ガイド部材41に接することなく上側ガイド部
材40のラック47に噛合しながら大小径ローラ42、43及び
小径ピニオン45と一体的に転動する。従って、小径ロー
ラ43、43が下部ガイド部材41上を転動すると大径ローラ
42も一体的に転動してこの大径ローラ42上に載置してい
る上側ガイド部材40が長さ方向に移動するものである。
なお、これらの大小径ローラ42、43と一体的に設けられ
ている大小径ピニオン44、45は夫々ラック47、49に噛合
しながら大小径ローラ42、43と一体的に回転し、大小径
ローラ42、43が夫々接した上下ガイド部材40、41に対し
てスリップするのを防止しているものである。The small diameter roller 43 is connected to the upper guide member 40.
Rolling on the upper surface of the lower guide member 41 without contacting the lower guide member 41, and the large-diameter roller 42 does not contact the lower groove 48 by immersing its outer peripheral portion in the grooves 46, 48 of the upper and lower guide members 40, 41. It always rolls while being in contact with the bottom surface of the upper groove 46. On the other hand, the small diameter pinion 45 rolls while engaging with the rack 49 of the lower guide member 41 without contacting the upper guide member 40, and the large diameter pinion 44 does not contact the lower guide member 41 and the rack of the upper guide member 40. While meshing with 47, they roll integrally with the large and small diameter rollers 42, 43 and the small diameter pinion 45. Therefore, when the small-diameter rollers 43, 43 roll on the lower guide member 41, the large-diameter rollers
The upper guide member 40 mounted on the large-diameter roller 42 also moves in the lengthwise direction by rolling together with 42.
The large and small diameter pinions 44 and 45 integrally provided with the large and small diameter rollers 42 and 43 rotate integrally with the large and small diameter rollers 42 and 43 while meshing with the racks 47 and 49, respectively. This prevents the upper and lower guide members 40 and 41, which are in contact with each other, from slipping.

【００２３】このように構成した免震機構４は、上記下
部台枠１の溝が上向きに開口した両側取付枠材13、14と
上記中間台枠２の溝が下向きに開口した両側取付枠材2
1、22との対向溝間における前後部内、即ち上下台枠
１、２の四隅部にその上下ガイド部材40、41を取付枠材
の長さ方向に向けた状態にして上下に対向した取付枠材
13、21間と14、22間に介在させてある。この際、免震機
構４の下側ガイド部材41を下部台枠１の取付枠材13、14
の溝内に収納してその下面を溝底面にボルト等によって
固定し、上側ガイド部材40を中間台枠２の取付枠材21、
22の溝内に収納してその上面を溝底面にボルト等によっ
て固定してある。The seismic isolation mechanism 4 constructed as described above is provided with both side mounting frame members 13 and 14 in which the groove of the lower underframe 1 is opened upward and both side mounting frame members in which the groove of the intermediate underframe 2 is opened downward. 2
Mounting frames facing up and down in the front and rear portions between the facing grooves of 1 and 22, that is, at the four corners of the upper and lower underframes 1 and 2, with the upper and lower guide members 40 and 41 oriented in the length direction of the mounting frame member. Material
It is interposed between 13, 21 and 14, 22. At this time, the lower guide member 41 of the seismic isolation mechanism 4 is attached to the mounting frame members 13 and 14 of the lower underframe 1.
And the lower surface of the upper guide member 40 is fixed to the bottom surface of the groove by bolts or the like, and the upper guide member 40 is attached to the mounting frame member 21 of the intermediate underframe 2.
It is housed in the groove of 22 and its upper surface is fixed to the groove bottom by bolts or the like.

【００２４】同様に、上記中間台枠２の溝が上向きに開
口した前後枠材23、24と上記上部台枠３の溝が下向きに
開口した前後取付枠材33、34との対向溝間における両側
部内、即ち上部台枠３と中間台枠２間の四隅部に免震機
構４を、その上下ガイド部材40、41を取付枠材の長さ方
向に向けた状態にして上下に対向した取付枠材23、33間
と24、34間に介在させてある。この際、免震機構４の下
側ガイド部材41を中間台枠２の取付枠材23、24の溝内に
収納してその下面を溝底面にボルト等によって固定し、
上側ガイド部材40を上部台枠３の取付枠材33、34の溝内
に収納してその上面を溝底面にボルト等によって固定し
てある。従って、下部台枠１と中間台枠２間の四方部に
介在した免震機構４と、中間台枠２と上部台枠３間の四
方部に介在した免震機構４とは互いに直交に交差させた
状態で上下に配設されている。そして、この免震機構４
を介して下部台枠１上に中間台枠２と上部台枠３とが順
次それらの外装枠部10、20、30を垂直方向に面一状態で
且つ上下に隣接する外装枠部間に僅かな隙間を存した積
載状態に構成されている。Similarly, between the front and rear frame members 23 and 24 in which the grooves of the intermediate underframe 2 are opened upward and the front and rear mounting frame members 33 and 34 in which the grooves of the upper underframe 3 are opened downward, between the opposite grooves. The seismic isolation mechanism 4 is installed in both sides, that is, in the four corners between the upper underframe 3 and the intermediate underframe 2, and the upper and lower guide members 40 and 41 are oriented in the length direction of the mounting frame member so as to vertically face each other. It is interposed between the frame members 23 and 33 and between the frame members 24 and 34. At this time, the lower guide member 41 of the seismic isolation mechanism 4 is housed in the grooves of the mounting frame members 23 and 24 of the intermediate underframe 2 and the lower surface thereof is fixed to the groove bottom surface with bolts or the like.
The upper guide member 40 is housed in the grooves of the mounting frame members 33 and 34 of the upper underframe 3, and the upper surface thereof is fixed to the groove bottom surface with bolts or the like. Therefore, the seismic isolation mechanism 4 interposed in the four sides between the lower underframe 1 and the intermediate underframe 2 and the seismic isolation mechanism 4 interposed in the four sides between the intermediate underframe 2 and the upper underframe 3 intersect each other at right angles. They are arranged one above the other in the opened state. And this seismic isolation mechanism 4
The intermediate underframe 2 and the upper underframe 3 are sequentially arranged on the lower underframe 1 through the outer underframes 10, 20, 30 in a state of being flush with each other in the vertical direction and slightly between the vertically adjacent outer underframes. It is configured to be loaded with various gaps.

【００２５】電動着脱機構５は図８、図９に示すよう
に、電磁ディスクブレーキからなるもので、電動グリッ
パ5aと上下方向に一定の高さを有する帯状鉄板よりなる
制動プレート5bとから構成され、電動グリッパ5aは、ア
ルミ合金等の非磁性材料からなるＵ字状の固定台板51の
両側壁部に固定子52、52を固着し、これらの固定子52、
52の下部対向面間の前後部にコイル53を巻装した鉄心5
4、54を固着していると共に固定子52、52の上部対向面
の中央部にスプリング55によって常時固定子側に引き寄
せられている電機子56、56を互いに接離自在に対向させ
て設けられ、電機子56、56の対向面に挟圧パッド57、57
を取付けてなるものである。As shown in FIGS. 8 and 9, the electric attachment / detachment mechanism 5 is composed of an electromagnetic disc brake, and is composed of an electric gripper 5a and a braking plate 5b composed of a strip-shaped iron plate having a certain height in the vertical direction. The electric gripper 5a has stators 52, 52 fixed to both side walls of a U-shaped fixed base plate 51 made of a non-magnetic material such as aluminum alloy.
An iron core 5 with a coil 53 wound around the front and back between the lower facing surfaces of 52.
The armatures 56 and 56, which are fixed to the stators 52 and 52 and which are always attracted to the stator side by a spring 55, are provided in the center of the upper facing surfaces of the stators 52 and 52 so as to be contactable and separable from each other. , The pressing pads 57, 57 on the facing surfaces of the armatures 56, 56.
Is attached.

【００２６】制動プレート5bは、図１〜図３に示すよう
に、中間台枠２の横長長方形状の免震機構取付枠材23、
24の中央部下面間に縦長長方形状の免震機構取付枠材2
1、22とその長さ方向を平行にして取付けられていると
共に縦長長方形状の免震機構取付枠材21、22の中央部上
面間にも横長長方形状の免震機構取付枠材23、24とその
長さ方向を平行にして取付けられている。即ち、中間台
枠２に背中合わせ状態にして一方の制動プレート5bを前
後方向に向け、他方の制動プレート5bを左右方向に向け
て互いに十字状に配設されているものである。As shown in FIGS. 1 to 3, the braking plate 5b is a horizontally-long rectangular seismic isolation mechanism mounting frame member 23 of the intermediate underframe 2.
Vertically long rectangular seismic isolation mechanism mounting frame material between the lower surfaces of the central part of 24
1, 22 and the longitudinal direction of the seismic isolation mechanism mounting frame members 23, 24 which are mounted in parallel with each other and also between the upper surfaces of the central portions of the vertically elongated rectangular seismic isolation mechanism mounting frame members 21, 22. And their length directions are parallel. That is, the two brake plates 5b are arranged in a cross shape so that one brake plate 5b faces the front-rear direction and the other brake plate 5b faces the left-right direction in a back-to-back relationship with the intermediate frame 2.

【００２７】電動グリッパ5aは下部台枠１と上部台枠３
とに取付けられている。詳しくは、下部台枠１側の電動
グリッパ5aは、下部台枠１の横長長方形状の前後繋ぎ材
11、12の中央部間に固着した電動グリッパ取付フレーム
16の中央部上面に、その対向する電機子56、56のパッド
57、57間に、中間台枠２の横長長方形状の免震機構取付
枠材23、24の下面間に下向きに設けた制動プレート5bを
挿通させた状態で取付けられている。一方、上部台枠３
側の電動グリッパ5aは、上部台枠３の両側繋ぎ材31、32
の中央部間に固着した電動グリッパ取付フレーム36の中
央部下面に、その対向する電機子56、56のパッド57、57
間に中間台枠２の両側の長方形状免震機構取付枠材21、
22の上面間に上向きに設けた制動プレート5bを挿通させ
た状態で取付けられている。The electric gripper 5a includes a lower underframe 1 and an upper underframe 3.
Installed on and. Specifically, the electric gripper 5a on the lower underframe 1 side is a horizontally long rectangular front and rear connecting member of the lower underframe 1.
Electric gripper mounting frame fixed between 11 and 12 central parts
On the upper surface of the central part of 16, the pads of the facing armatures 56, 56
Between the 57 and 57, the horizontally extending rectangular seismic isolation mechanism mounting frame members 23 and 24 of the intermediate underframe 2 are mounted with the braking plate 5b provided downward between the lower surfaces thereof. On the other hand, the upper frame 3
The electric gripper 5a on the side is connected to both sides of the upper underframe 3 by the connecting members 31, 32.
On the lower surface of the central portion of the electric gripper mounting frame 36 fixed between the central portions of the, the pads 57, 57 of the facing armatures 56, 56 are provided.
Between the rectangular base isolation mechanism mounting frame members 21 on both sides of the intermediate underframe 2,
The braking plate 5b provided upward is inserted between the upper surfaces of the members 22.

【００２８】震動感知器６は図10に示すように、永久磁
石61に磁着されている感知体62と、この感知体62の上下
動に応じて一体的に回動するレバー63と、このレバー63
の下動によって閉じるマイクロスイッチ64とからなり、
感知体62は所定以上の振動力によって上記永久磁石61の
磁着力に打ち勝って落下するように構成されている。さ
らに、この感知体62の下方に、落下した感知体62を押し
上げて永久磁石61に磁着させるためのソレノイド65が配
設されている。As shown in FIG. 10, the vibration detector 6 includes a sensing body 62 magnetically attached to a permanent magnet 61, a lever 63 that integrally rotates according to the vertical movement of the sensing body 62, and Lever 63
It consists of a micro switch 64 that is closed by the downward movement of
The sensing body 62 is configured to overcome the magnetic force of the permanent magnet 61 and drop by vibrating force of a predetermined level or more. Further, below the sensing body 62, a solenoid 65 for pushing up the dropped sensing body 62 and magnetically attaching it to the permanent magnet 61 is arranged.

【００２９】８は下部台枠１の前後繋ぎ材11、12の対向
面にその前後両端を固着した断面Ｕ字状の溝部材で、図
２に示すように、前後取付枠材11、12に平行に設けられ
てあり、その溝内に粘性オイル81を収容している。一
方、中間台枠２の下面には上記溝部材８の長さ方向の中
央部に対向させて抵抗板９を装着してあり、この抵抗板
９を溝部材８の粘性オイル81内に没入させている。同様
に、中間台枠２の両側取付枠材21、22間に前後取付枠材
23、24と平行にして、即ち、上記下側の溝部材８と直交
方向に断面Ｕ字状の溝部材8aを架設状態で固着してあ
り、その溝内に粘性オイル82を収容している。一方、上
部台枠３の両側繋ぎ材31、32間に桟部材36を固着してあ
り、この桟部材36の下面には上記溝部材8aの長さ方向の
中央部に対向させて抵抗板9aを装着してあり、この抵抗
板9aを溝部材8aの粘性オイル82内に没入させている。上
記粘性オイル81、82を収容した溝部材８、8aと抵抗板
９、9aとで振動エネルギーを吸収するダンパーを構成し
ている。なお、中間台枠２側の抵抗板９は上側の溝部材
8aの下面に固着されている。Reference numeral 8 denotes a groove member having a U-shaped cross section in which both front and rear ends are fixed to the facing surfaces of the front and rear connecting members 11 and 12 of the lower underframe 1. As shown in FIG. They are provided in parallel and the viscous oil 81 is contained in the groove. On the other hand, a resistance plate 9 is attached to the lower surface of the intermediate underframe 2 so as to face the center of the groove member 8 in the longitudinal direction, and the resistance plate 9 is immersed in the viscous oil 81 of the groove member 8. ing. Similarly, between the front and rear mounting frame members 21 and 22 on both sides of the intermediate underframe 2.
A groove member 8a having a U-shaped cross-section is fixed in a erected state in parallel with 23 and 24, that is, in a direction orthogonal to the lower groove member 8 and a viscous oil 82 is accommodated in the groove. . On the other hand, a crosspiece member 36 is fixed between the connecting members 31 and 32 on both sides of the upper underframe 3, and the lower surface of the crosspiece member 36 is made to face the central portion of the groove member 8a in the lengthwise direction so as to face the resistance plate 9a. The resistance plate 9a is immersed in the viscous oil 82 of the groove member 8a. The groove members 8 and 8a containing the viscous oils 81 and 82 and the resistance plates 9 and 9a form a damper that absorbs vibration energy. The resistance plate 9 on the intermediate underframe 2 side is a groove member on the upper side.
It is fixed to the lower surface of 8a.

【００３０】図11は下部台枠１に取付けている電動着脱
機構制御盤７の制御配線回路図で、AC100Vの交流電源接
続プラグ101 の交流電源を直流電源に変換し、この回路
の配線102 、103 を残留磁気除去装置104 に接続してい
ると共に残留磁気除去装置104 に並列的に上記上下電動
着脱機構５の電動グリッパ5a、5aを接続している。さら
に、配線102 、103 に並列して電源スイッチ105 と震動
感知器作動スイッチ106 、リレーR1を順次直列に接続し
た回路107 を設けていると共に電源スイッチ105 と震動
感知器作動スイッチ106 との間に、配線103 に並列的に
接続した電源表示灯108 を有する回路109 と、感知器作
動表示灯110 を備え且つ上記震動感知器６に接続してい
る回路111 とを接続し、震動感知器６と感知器作動表示
灯110 間の回路と配線103 との間にはリレーR2を有する
回路を接続している。また、交流電源接続プラグ101 側
の配線に震動感知器リセット出力配線112 を接続し、こ
の配線112 にリレースイッチr1を設けていると共に上記
残留磁気除去装置104 に接続した配線102 中にリレース
イッチr2を設けている。FIG. 11 is a control wiring circuit diagram of the electric attachment / detachment mechanism control panel 7 mounted on the lower underframe 1. The AC power supply of the AC power supply connection plug 101 of AC100V is converted into a DC power supply, and the wiring 102 of this circuit, 103 is connected to the residual magnetism removing device 104, and the electric grippers 5a, 5a of the vertical electric attaching / detaching mechanism 5 are connected in parallel to the residual magnetism removing device 104. In addition, a power switch 105, a vibration sensor activation switch 106, and a circuit 107 in which a relay R1 is sequentially connected in series are provided in parallel with the wirings 102 and 103, and between the power switch 105 and the vibration sensor activation switch 106. , A circuit 109 having a power supply indicator lamp 108 connected in parallel to the wiring 103 and a circuit 111 having a sensor operation indicator lamp 110 and connected to the vibration sensor 6 are connected to each other, and A circuit having a relay R2 is connected between the circuit between the sensor operation indicator lights 110 and the wiring 103. Further, the vibration sensor reset output wiring 112 is connected to the wiring on the side of the AC power supply connection plug 101, the relay switch r1 is provided on this wiring 112, and the relay switch r2 is connected to the wiring 102 connected to the residual magnetism removing device 104. Is provided.

【００３１】この電動着脱機構制御回路を参照しながら
免震台の作動を説明すると、まず免震台上に美術品等の
展示する展示ケースＡを載置して建物の床面（設置面）
の所望個所に設置したのち、制御回路のプラグ101 を電
源に接続する。なお、免震台を床面に設置するには、図
１、図12に示すように、その下部台枠１の下面四方部に
車輪Ｂを取付けておくと共に四隅部にアジャスターＣを
装着して、該アジャスターＣを免震台の設置場所におい
て、その高さを調整して車輪Ｂを設置面から離間させた
状態で免震台を床面上に水平に固定するものである。The operation of the seismic isolation table will be described with reference to this electric attachment / detachment mechanism control circuit. First, the display case A for exhibiting works of art and the like is placed on the seismic isolation table and the floor surface (installation surface) of the building is installed.
After installing it at the desired location, connect the control circuit plug 101 to the power supply. In order to install the seismic isolation table on the floor, as shown in FIGS. 1 and 12, the wheels B are attached to the lower underside of the lower frame 1 and the adjusters C are attached to the four corners. In the installation location of the seismic isolation base, the adjuster C is adjusted in height and the seismic isolation base is horizontally fixed on the floor surface with the wheels B separated from the installation surface.

【００３２】この免震台の設置時に、下部台枠１に対し
て中間台枠２及び上部台枠３が免震機構４を介して揺動
するのを防止するために、図２〜図４に示すように、上
部台枠３の外装枠部30の両側部にハンドルＤを回動自在
及び抜取り可能に取付けておく一方、このハンドルＤの
回動軸ｄに対応する下部台枠１の外装枠部10と中間台枠
２の外装枠部20との両側部に係止孔Ｅ、Ｆを設けてお
く。そして、免震台の設置に際してハンドルＤを回動さ
せることによりその回動軸ｄの一部を上記係止孔Ｅ、Ｆ
に係脱自在に係止させることで、下部台枠１上に中間台
枠２と上部台枠３とを正確に固定する。免震台の設置後
は、下部台枠１に対する中間台枠２と上部台枠３との固
定を解除するためにハンドルＤを抜き取っておいてもよ
いが、該ハンドルＤを上部台枠３の外装枠部30内に収納
して解除状態を維持させておいてもよい。2 to 4 in order to prevent the intermediate underframe 2 and the upper underframe 3 from swinging with respect to the lower underframe 1 through the seismic isolation mechanism 4 when the seismic isolation table is installed. As shown in FIG. 3, the handle D is rotatably and detachably attached to both sides of the outer frame portion 30 of the upper underframe 3, while the outer casing of the lower underframe 1 corresponding to the rotation axis d of the handle D is attached. Locking holes E and F are provided on both sides of the frame 10 and the exterior frame 20 of the intermediate underframe 2. Then, when the seismic isolation table is installed, the handle D is rotated so that a part of the rotation axis d of the seismic isolation table is locked by the locking holes E and F.
The intermediate underframe 2 and the upper underframe 3 are accurately fixed on the lower underframe 1 by being engaged and disengaged with the underframe. After the seismic isolation table is installed, the handle D may be removed to release the fixation of the intermediate underframe 2 and the upper underframe 3 to the lower underframe 1, but the handle D of the upper underframe 3 may be removed. It may be housed in the exterior frame portion 30 to maintain the released state.

【００３３】免震台内に配設した上記各免震機構４は、
その上下ガイド部材40、41を上下に対向した台枠の溝形
鋼材からなる取付枠材の溝内に夫々装着しているので、
免震台全体の厚みを薄くすることができ、常態において
はこれらの上下ガイド部材40、41間に小径ローラ43と一
体的に介在している大径ローラ42は展示ケースＡ側から
の荷重により、その中心を小径ローラ43の中心の真下に
位置させて小径ローラ43の中心に対して最も短い外周面
部、即ち、小径ローラ43の周面からの突出量が最も少な
い外周面部を上方に向けた状態で展示台側や展示ケース
Ａ側の荷重を安定的に支持している。Each of the seismic isolation mechanisms 4 arranged in the seismic isolation base is
Since the upper and lower guide members 40 and 41 are respectively mounted in the grooves of the mounting frame material made of the channel steel of the underframes that face each other vertically,
It is possible to reduce the thickness of the seismic isolation table as a whole, and in a normal state, the large-diameter roller 42, which is integrally interposed between the upper and lower guide members 40, 41 and the small-diameter roller 43, is loaded by the load from the display case A side. , Its center is located directly below the center of the small-diameter roller 43, and the shortest outer peripheral surface portion with respect to the center of the small-diameter roller 43, that is, the outer peripheral surface portion having the smallest amount of protrusion from the peripheral surface of the small-diameter roller 43 is directed upward. In this state, the load on the display stand side and the display case A side is stably supported.

【００３４】こうして免震台を設置したのち電源に接続
し、電源スイッチ105 を押して上記配線回路に通電す
る。なお、この電源スイッチ105 を再度押すと絶電す
る。電源スイッチ105 を押すと、電源表示灯108 が点灯
し、しかるのち、震動感知作動スイッチ106 を押す。こ
の震動感知作動スイッチ106 は押している間のみ通電(O
N)し、手放すと絶電(OFF) するように構成されている。
震動感知作動スイッチ106を押したのち手放すと、通電
によってリレーR₁が作動してリレースイッチr₁が接続
し、震動感知器６の感知体62の下方に配設しているソレ
ノイド65の可動鉄心が図10に示すように、その通電によ
って上動して感知体62とレバー63を押し上げて磁石61に
磁着させ、マイクロスイッチ64を開放させて震動感知器
６を作動状態にする。しかるのち、スイッチ106 を手放
してリレースイッチr₁を切る。After the seismic isolation table is installed in this way, it is connected to a power source and the power switch 105 is pressed to energize the wiring circuit. In addition, when the power switch 105 is pressed again, the power is cut off. When the power switch 105 is pressed, the power indicator lamp 108 lights up, and then the vibration detection activation switch 106 is pressed. This vibration detection activation switch 106 is energized (O
N), and it is configured to turn off (OFF) when released.
When the vibration detection activation switch 106 is pressed and then released, the relay R ₁ is activated by energization, the relay switch r ₁ is connected, and the movable iron core of the solenoid 65 disposed below the sensor 62 of the vibration sensor 6 As shown in FIG. 10, the energization moves upward to push up the sensing body 62 and the lever 63 so that the magnet 61 is magnetically attached, and the micro switch 64 is opened to activate the vibration sensor 6. Then, let go of the switch 106 and turn off the relay switch r ₁ .

【００３５】このように震動感知器６を作動状態（通電
状態）にすると、リレーR₂が作動してリレースイッチr₂
が接続され、上下台枠１、３に装着している電動着脱機
構５の電動グリッパ5a、5aが通電されて作動状態とな
る。即ち、この電動グリッパ5a、5aの直列に並んだ２つ
のコイル53に発生する磁束が対向する電機子56、56間に
介挿している中間台枠２側に配設した制動プレート5bを
通じて流れ、電機子56、56が互いに引き合って制動プレ
ート5bの両面を電機子56、56の対向面に貼着したパッド
57、57により挟着し、下部台枠１と中間台枠２および上
部台枠３が一体的に連結固定される。なお、震動感知器
６が作動状態になると感知器作動表示灯110 が点灯す
る。この状態にして免震台上に展示ケースＡを設置して
おくものである。When the vibration sensor 6 is activated (energized) in this way, the relay R ₂ is activated and the relay switch r ₂ is activated.
Are connected, and the electric grippers 5a, 5a of the electric attachment / detachment mechanism 5 attached to the upper and lower underframes 1, 3 are energized to be in an operating state. That is, the magnetic flux generated in the two coils 53 of the electric grippers 5a, 5a arranged in series flows through the braking plate 5b arranged on the intermediate underframe 2 side interposed between the facing armatures 56, 56, A pad in which the armatures 56, 56 are attracted to each other and the both sides of the braking plate 5b are attached to the opposing surfaces of the armatures 56, 56.
The lower underframe 1, the intermediate underframe 2 and the upper underframe 3 are integrally connected and fixed by being sandwiched by 57, 57. It should be noted that when the vibration sensor 6 is activated, the sensor activation indicator light 110 lights up. In this state, the display case A is installed on the seismic isolation table.

【００３６】展示中に停電すると、配線回路中の電動着
脱機構５の電動グリッパ5a、5a側に電流が流れなくなっ
て対向する電機子56、56がスプリング55の復元力によっ
て互いに離間する方向に移動し、下部台枠１と上部台枠
３とに装着しているこれらの電動グリッパ5aの電機子5
6、56が中間台枠２の上下制動プレート5b、5bに対する
それぞれの挟着を解き、制動プレート5bの垂直面に摺接
した状態、或いは該垂直面から僅かに離れて下部台枠１
に対して中間台枠２と上部台枠３とがそれぞれ前後左右
に揺動可能な状態になる。この停電時においては、震動
感知器６はその感知体62を磁石61に磁着させて作動可能
な状態を維持している。停電が復旧すると、電動着脱機
構５の電動グリッパ5a、5a側に電流が流れ、上述した動
作でもって電動グリッパ5aの対向する電機子56、56が互
いに引き寄せ合って制動プレート5bを挟着し、下部台枠
１と中間台枠２および上部台枠３とを連結固定状態に自
動的に復帰させる。If a power failure occurs during the exhibition, no current will flow to the electric grippers 5a, 5a side of the electric attachment / detachment mechanism 5 in the wiring circuit, and the opposing armatures 56, 56 will move in a direction in which they are separated from each other by the restoring force of the spring 55. The armature 5 of these electric grippers 5a mounted on the lower underframe 1 and the upper underframe 3
When the lower frame 1 and the lower frame 1 are slidably in contact with the vertical surface of the braking plate 5b, 6 and 56 release the sandwiching between the upper and lower braking plates 5b and 5b of the intermediate underframe 2.
On the other hand, the intermediate underframe 2 and the upper underframe 3 are in a state of being capable of swinging back and forth and right and left respectively. At the time of this power failure, the vibration sensor 6 magnetically attaches the sensor 62 to the magnet 61 and maintains the operable state. When the power failure is restored, a current flows to the electric grippers 5a, 5a side of the electric attachment / detachment mechanism 5, and the opposing armatures 56, 56 of the electric gripper 5a attract each other by the above-mentioned operation to sandwich the braking plate 5b, The lower underframe 1, the intermediate underframe 2 and the upper underframe 3 are automatically returned to the connected and fixed state.

【００３７】次に、地震が発生して震動感知器６の感知
体62が設定加速度以上の震動を感知すると、磁石61の磁
着力に打ち勝って落下し、レバー63を下回動させてマイ
クロスイッチ64を開方向（OFF 方向) に作動させ、リレ
ーR₂が作動してリレースイッチr₂が切れ、電動グリッパ
5a、5aに電流が流れなくなって上述した動作により電機
子56、56による制動プレート5bに対する挟着が解かれ、
設置面上に固定している下部台枠１に対して中間台枠２
が一水平方向（前後方向）に、この中間台枠２に対して
上部台枠３が中間台枠２直交する水平方向（左右方向）
に夫々免震機構４の大小径ローラ42、43を介して揺動可
能な状態にする。この状態は配線回路中に通電されても
人手により震動感知器作動スイッチ106 を押してソレノ
イド65に通電させることにより感知体62を持ち上げてレ
バー63を磁石61に磁着させないかぎり維持される。な
お、震動感知器６とは別体の震動センサーを設けると共
に、このような手動の震動感知器作動スイッチ106 に代
えて震動センサーが所定以上の震動を感知しなくなった
時、震動センサーからの信号により自動的に作動スイッ
チ106 を接続させるように構成しておいてもよい。この
ように構成すると、地震の揺れがおさまれば自動的に連
結状態に復帰させることが可能である。Next, when an earthquake occurs and the sensor 62 of the vibration sensor 6 senses a vibration of a preset acceleration or higher, the magnetic force of the magnet 61 is overcome to fall, and the lever 63 is rotated downward to rotate the micro switch. 64 is operated in the opening direction (OFF direction), relay R ₂ is activated, relay switch r ₂ is turned off, and the electric gripper
The current no longer flows through 5a, 5a, and by the above-described operation, the armatures 56, 56 are unpinched from the braking plate 5b,
Intermediate underframe 2 against lower underframe 1 that is fixed on the installation surface
In one horizontal direction (front-back direction), the upper underframe 3 is orthogonal to the intermediate underframe 2 in the horizontal direction (left-right direction).
First, the large and small diameter rollers 42 and 43 of the seismic isolation mechanism 4 are made swingable. This state is maintained unless the vibration sensor actuating switch 106 is manually pushed to energize the solenoid 65 and the sensor 62 is lifted to magnetically attach the lever 63 to the magnet 61 even if electricity is applied to the wiring circuit. It should be noted that a vibration sensor separate from the vibration sensor 6 is provided, and when the vibration sensor does not detect a vibration exceeding a predetermined level in place of such a manual vibration sensor operating switch 106, a signal from the vibration sensor is transmitted. The operation switch 106 may be automatically connected according to the above. With this configuration, it is possible to automatically return to the connected state when the shaking of the earthquake subsides.

【００３８】地震の発生により設置面と一体的に下部台
枠１が震動方向に往復振動すると、その振動方向に転動
可能に配設された免震機構４の大小径ローラ42、43が下
部台枠１に対して相対的に反対方向に転動する。例え
ば、図５〜図７において、下部台枠１と一体の下側ガイ
ド部材41が矢印方向に移動すると、該下部ガイド部材41
上に圧接している小径ローラ43が反時計方向に回転力を
付与され、偏心大径ローラ42が一体的に同一方向に回転
して該大径ローラ42上に乗っている上側ガイド部材40が
下部ガイド部材41と反対方向に相対移動しようとする。When the lower underframe 1 reciprocally vibrates in the vibration direction integrally with the installation surface due to the occurrence of an earthquake, the large and small diameter rollers 42, 43 of the seismic isolation mechanism 4 arranged so as to roll in the vibration direction move downward. Rolls in the opposite direction relative to the underframe 1. For example, in FIG. 5 to FIG. 7, when the lower guide member 41 integrated with the lower underframe 1 moves in the arrow direction, the lower guide member 41
The small-diameter roller 43 press-contacted upward is given a rotational force in the counterclockwise direction, the eccentric large-diameter roller 42 integrally rotates in the same direction, and the upper guide member 40 mounted on the large-diameter roller 42 is Attempts to move relative to the lower guide member 41 in the opposite direction.

【００３９】大径ローラ42が上記のように転動すると、
その転動角度が大きくなるに従って小径ローラ43の外周
からの大径ローラ42の外周面の突出量が大きくなり且つ
該大径ローラ42の中心が小径ローラ43の中心に対して転
動方向とは反対方向に移動するので、展示ケースＡの荷
重によって、その転動を阻止しようとする抵抗力が発生
し、この抵抗力によって大小径ローラ42、43の転動が停
止し、その状態から展示品側を支持している上側ガイド
部材40が時間的な遅れでもって下側ガイド部材41と同一
方向に水平移動することになる。When the large diameter roller 42 rolls as described above,
As the rolling angle increases, the amount of protrusion of the outer peripheral surface of the large diameter roller 42 from the outer periphery of the small diameter roller 43 increases, and the center of the large diameter roller 42 is defined as the rolling direction with respect to the center of the small diameter roller 43. Since it moves in the opposite direction, the load of the display case A generates a resistance force that tries to prevent the rolling, and this resistance force stops the rolling of the large and small diameter rollers 42, 43, and from that state The upper guide member 40 supporting the side horizontally moves in the same direction as the lower guide member 41 with a time delay.

【００４０】さらに、この上側ガイド部材40の水平移動
途上において、下部台枠１が地震の往復震動によって反
対方向に水平移動し、その方向の移動によって大小径ロ
ーラ42、43は上記とは反対方向に転動して逆方向の抵抗
力が発生し、従って、上側ガイド部材40が下部台枠１の
水平移動量よりもはるかに小さい移動量を行ったのちに
下側ガイド部材42と同一方向に水平移動しようとする。
従って、震動による上側ガイド部材40の水平方向の移動
量が極めて小さくなり、この上側ガイド部材40を介して
上部台枠３上に載置している展示品側の水平移動量は極
めて小さくなる。実質上、下側ガイド部材40が左右に揺
れても大小径ローラ42、43がその揺れの大小に応じて上
側ガイド部材42との接触点を支点とするように左右に回
転して上側ガイド部材42には殆ど揺れが伝達されないの
である。即ち、水平方向の震動が大小径ローラ42、43を
介して減衰した震動波が展示品側に伝達され、展示品の
揺れが抑制されるものである。Further, during the horizontal movement of the upper guide member 40, the lower underframe 1 horizontally moves in the opposite direction due to the reciprocating vibration of the earthquake, and the large and small diameter rollers 42, 43 move in the opposite direction due to the movement in that direction. And a resistance force in the opposite direction is generated. Therefore, after the upper guide member 40 performs a movement amount much smaller than the horizontal movement amount of the lower underframe 1, in the same direction as the lower guide member 42. Try to move horizontally.
Therefore, the horizontal movement amount of the upper guide member 40 due to the vibration becomes extremely small, and the horizontal movement amount of the exhibit placed on the upper underframe 3 via the upper guide member 40 becomes extremely small. In effect, even if the lower guide member 40 sways left and right, the large and small diameter rollers 42, 43 rotate left and right so that the contact point with the upper guide member 42 serves as a fulcrum according to the magnitude of the sway. The shaking is hardly transmitted to 42. That is, the vibration wave in which the horizontal vibration is attenuated is transmitted to the exhibit side via the large and small diameter rollers 42 and 43, and the shake of the exhibit is suppressed.

【００４１】下部台枠１と中間台枠２との間に介在した
免震機構４と、中間台枠２と上部台枠３との間に介在し
た免震機構４とは互いに直交方向に配設しているので、
前後左右、さらにあらゆる方向の震動に対してもこれら
の上下免震機構４によって上部台枠３上に載置している
展示品や展示ケース本体Ｂに伝達されないようにするこ
とができる。さらに、これらの大小径ローラ42、43と一
体的に設けられている大小径ピニオン44、45は夫々上下
ガイド部材40、41に設けているラック47、49に噛合しな
がら大小径ローラ42、43と一体的に回転し、大小径ロー
ラ42、43が夫々接した上下ガイド部材40、41に対してス
リップするのを防止して全ての免震機構４の大小径ロー
ラ42、43を同一転動速度でもって回転させるものであ
る。The seismic isolation mechanism 4 interposed between the lower underframe 1 and the intermediate underframe 2 and the seismic isolation mechanism 4 interposed between the intermediate underframe 2 and the upper underframe 3 are arranged in directions orthogonal to each other. Since it has been set up,
These vertical seismic isolation mechanisms 4 can prevent vibrations in all directions, front and rear, left and right, from being transmitted to the exhibit or the display case body B placed on the upper frame 3. Further, the large and small diameter pinions 44 and 45 integrally provided with the large and small diameter rollers 42 and 43 mesh with the racks 47 and 49 provided on the upper and lower guide members 40 and 41, respectively. And the large and small diameter rollers 42 and 43 prevent the large and small diameter rollers 42 and 43 from slipping against the upper and lower guide members 40 and 41 that are in contact with the large and small diameter rollers 42 and 43, respectively. It rotates at speed.

【００４２】さらに、中間台枠２には下部台枠１に対す
る該中間台枠２の揺動方向と上部台枠３の揺動方向とに
長い上下制動プレート5b、5bが平面十字状に取付けられ
てあり、震動時には下部台枠１に装着した電動グリッパ
5aの対向するパッド57、57が下側制動プレート5bの両面
に沿って相対移動する一方、上部台枠３に装着した電動
グリッパ5aの対向するパッド57、57が上側制動プレート
5bの両面に沿って相対移動する。なお、電動着脱機構５
を構成するこれらの電動グリッパ5aと制動プレート5bと
は、上記取付態様に限らず、上下に対向する台枠のいず
れか一方に電動グリッパ5aを他方に制動プレート5bを取
付けておけばよい。Further, upper and lower braking plates 5b, 5b, which are long in the swing direction of the intermediate underframe 2 and the swing direction of the upper underframe 3 with respect to the lower underframe 1, are attached to the intermediate underframe 2 in a plane cross shape. There is an electric gripper attached to the lower underframe 1 during vibration.
Opposing pads 57, 57 of 5a relatively move along both sides of lower braking plate 5b, while opposing pads 57, 57 of electric gripper 5a mounted on upper underframe 3 are upper braking plates.
Relative movement along both sides of 5b. The electric attachment / detachment mechanism 5
The electric gripper 5a and the braking plate 5b constituting the above are not limited to the above-mentioned attachment mode, and the electric gripper 5a may be attached to one of the vertically opposed underframes and the braking plate 5b may be attached to the other.

【００４３】また、下部台枠１と中間台枠２とに夫々の
移動方向に平行に配設している溝部材８内の粘性オイル
81、82に中間台枠２と上部台枠３とから突設している抵
抗板９、9aを没入させているので、中間台枠２と上部台
枠３との水平移動が粘性オイル81、82によって夫々吸収
減衰され、地震が去ったのちには迅速且つ確実に下部台
枠１上の元の位置に中間台枠２と展示品や展示ケースＡ
を載置した上部台枠３とを復帰させるものである。地震
がおさまれば、再び上述した手順、即ち、電源スイッチ
105 をONにし、震動感知器作動スイッチ106 を所定時間
押したのち手放すことにより感知体62をソレノイド65に
より押し上げて磁石61に磁着させ、電動着脱機構５によ
る台枠同士の連結、固定を行う。Further, the viscous oil in the groove member 8 disposed in the lower underframe 1 and the intermediate underframe 2 in parallel to the respective moving directions.
Since the resistance plates 9 and 9a protruding from the intermediate underframe 2 and the upper underframe 3 are immersed in 81 and 82, the horizontal movement between the intermediate underframe 2 and the upper underframe 3 is viscous oil 81, After being absorbed and attenuated by 82 respectively, the intermediate underframe 2 and the exhibit or display case A can be quickly and surely returned to their original positions on the lower underframe 1 after the earthquake.
The upper underframe 3 on which is mounted is returned. Once the earthquake has subsided, follow the above procedure again, namely the power switch.
When 105 is turned on, the vibration sensor activation switch 106 is pressed for a predetermined time and then released, the sensor 62 is pushed up by the solenoid 65 and magnetically attached to the magnet 61, and the electric attachment / detachment mechanism 5 connects and fixes the underframes. .

【００４４】巨大地震が発生した時の震動に対応するに
必要な水平方向の変位量は高々30〜40cmであり、従っ
て、上下台枠間で少なくともその変位量が可能となるよ
うに大小径ローラ42、43の直径を設定する。この場合、
大径ローラ42の転動角度は上記抵抗力を発生させるため
には180 度以下にしなければならない。従って、大小径
ローラ42、43が半円周だけ転動すると、上下台枠間の相
対的な水平移動量は、これらのローラ42、43の半円周長
の和であるから、上記最大変位量に対応する大小径ロー
ラ42、43の径は容易に設定することができる。The amount of horizontal displacement required to respond to a vibration when a huge earthquake occurs is at most 30-40 cm. Therefore, large and small diameter rollers are provided so that at least the amount of displacement between the upper and lower underframes is possible. Set the diameter of 42 and 43. in this case,
The rolling angle of the large diameter roller 42 must be 180 degrees or less in order to generate the above resistance force. Therefore, when the large and small diameter rollers 42, 43 roll about a half circumference, the relative horizontal movement amount between the upper and lower underframes is the sum of the half circumference lengths of these rollers 42, 43. The diameters of the large and small diameter rollers 42, 43 corresponding to the amount can be easily set.

【００４５】なお、上下台枠間に介在させている免震機
構４として、上記実施例においては小径ローラ43を下側
の台枠側上に接して転動させるようにし、大径ローラ42
を上側の台枠側に接して転動させるようにしたが、図13
に示すように小径ローラ43を上側の台枠側下面に接して
転動させるようにし、大径ローラ42を下側の台枠側の上
面に接して転動させるようにしてもよく、また、このよ
うな大小径ローラ42、43を偏心させることなく、図14に
示すように、同一径のローラ42a 、42b を偏心させて一
体に組み合わせて一方のローラを上側台枠の下面に、他
方のローラを下側台枠の上面にそれぞれ接して転動させ
ても上記と同様な免震作用を発揮し得るものであり、要
するに、中心O₁が他方のローラの中心O₂よりも上側にあ
る一方のローラを下側台枠側に接して転動させるように
すると共に中心O₂が一方のローラの中心O₁よりも下側に
ある他方のローラを上側台枠側に接して転動させるよう
にしておけばよい。As the seismic isolation mechanism 4 interposed between the upper and lower underframes, in the above-described embodiment, the small diameter roller 43 is brought into contact with the lower underframe side to roll the large diameter roller 42.
It was designed to roll by touching the upper frame side,
The small diameter roller 43 may be brought into contact with the lower surface of the upper frame side to be rolled, and the large diameter roller 42 may be brought into contact with the upper surface of the lower frame side to be rolled, as shown in FIG. Without eccentricizing such large and small diameter rollers 42 and 43, as shown in FIG. 14, eccentric rollers 42a and 42b are eccentrically combined together and one roller is attached to the lower surface of the upper frame and the other is Even if the rollers are brought into contact with the upper surface of the lower underframe and rolled, the same seismic isolation effect as described above can be exhibited. In short, the center O ₁ is above the center O _{2 of the} other roller. One roller is brought into contact with the lower underframe side to roll, and the other roller whose center O ₂ is lower than the center O _{1 of one} roller is brought into contact with the upper underframe side to roll. You can do it like this.

【００４６】[0046]

【発明の効果】以上のように本発明の免震台によれば、
設置面に固定する下部台枠上に免震機構を介して前後左
右いずれかの方向に揺動可能に載置された中間台枠と、
この中間台枠上に免震機構を介して上記揺動方向と直交
する方向に揺動可能に載置された上部台枠と、上記下部
台枠と中間台枠間および中間台枠と上部台枠間をそれぞ
れ連結固定し且つその連結固定を解除可能にする電動着
脱機構と、所定以上の震動の発生により作動する震動感
知器とからなる免震台であって、上記電動着脱機構は一
対の挟圧パッドを備えた電動グリッパと、この電動グリ
ッパの挟圧パッド間に介在させる制動プレートとからな
り、上記上下に対向する台枠のいずれか一方の台枠に電
動グリッパをその挟圧パッドの対向面間を揺動方向に向
けた状態で固着し、他方の台枠に制動プレートをその長
さ方向を台枠の揺動方向に向けた状態で固定して、上記
電動グリッパが通電された状態においては挟圧パッドに
より上記制動プレートを挟着して下部台枠と中間台枠お
よび上部台枠を連結固定させておく一方、上記震動感知
器が所定以上の震動を感知した時には上記電動グリッパ
を絶電させて台枠間の連結固定を開放させるように構成
しているので、停電復旧後に免震台上に設置した展示ケ
ースなどを押圧しても、揺動したり傾倒するのを確実に
阻止することができる。As described above, according to the seismic isolation table of the present invention,
An intermediate underframe mounted on the lower underframe fixed to the installation surface so as to be swingable in either the front, rear, left, or right direction via a seismic isolation mechanism,
An upper underframe mounted on the intermediate underframe via a seismic isolation mechanism so as to be swingable in a direction orthogonal to the swing direction, between the lower underframe and the intermediate underframe, and between the intermediate underframe and the upper underframe. an electric detaching mechanism to the inter-frame releasable coupling fixed and its connected and fixed respectively to a MenShindai comprising a vibration sensor that operates by the generation of a predetermined or more vibration, the electric detaching mechanism one
An electric gripper with a pair of clamping pads
It consists of a braking plate that is placed between the pad
Power to either one of the above-mentioned vertically facing underframes.
Orient the moving gripper in the swinging direction between the opposing faces of the clamping pad.
Fixed in a column, and the braking plate on the other underframe
Fix it in the state that the vertical direction is the swing direction of the underframe,
When the electric gripper is energized,
From the bottom frame and the middle frame
And the upper underframe are connected and fixed, and when the vibration detector detects a vibration exceeding a predetermined level, the electric gripper
Since it is configured to cut off the electric power to release the connection and fixing between the underframes , even if the display case installed on the seismic isolation table is pressed after the power is restored, it can be rocked or tilted. Can be blocked.

【００４７】さらに、上記震動感知器が所定以上の震動
を感知した時に上記電動グリッパを絶電させて台枠間の
連結固定を開放させるように構成しているから、通電中
や停電時に関係なく、常に震動感知器を作動可能な状態
にしておくことができると共に地震の発生によって震動
感知器が作動すると、電動着脱機構による台枠間の連結
固定を直ちに解除すると共にその解除状態を維持して免
震機構により揺れを抑制し得るものである。Further, when the vibration detector detects a vibration of a predetermined magnitude or more, the electric gripper is de-energized to remove the gap between the underframes.
Since the connection and fixation are configured to be opened , the seismic detector can be kept in operation regardless of whether power is on or a power outage occurs. It is possible to immediately release the connection and fixation between the underframes by the mechanism and maintain the released state to suppress the shaking by the seismic isolation mechanism.

【００４８】また、上記電動着脱機構として、上下台枠
のいずれか一方に装着する電動グリッパと、この電動グ
リッパの一対の挟圧パッド間に介挿した状態で他方の台
枠に装着する制動プレートとより構成しているので、通
常時には一対の挟圧パッドによって制動プレートを挟着
して上下台枠間をガタツキが生じることなく強固に連結
固定させておくことができると共にその連結固定位置を
制動プレートの長さ方向の所望部位に簡単且つ正確に設
定し得るものであり、さらに、地震発生時には一対の挟
圧パッドが離間する方向に作動して制動プレートに対す
る挟着が解かれ、上下台枠の水平方向の相対揺動によっ
て電動グリッパの一対の挟圧パッドを制動プレートの長
さ方向に沿って相対移動させながら免震機構による揺れ
の抑制作動を行わせることができる。As the electric attachment / detachment mechanism, an electric gripper attached to either one of the upper and lower underframes, and a braking plate attached to the other underframe in a state of being interposed between a pair of clamping pads of the electric gripper. Since it is composed of, the braking plate is normally sandwiched by a pair of clamping pads to firmly connect and fix the upper and lower underframes without rattling, and the connecting and fixing position is braked. It can be easily and accurately set to a desired part in the length direction of the plate. Furthermore, when an earthquake occurs, the pair of pinching pads act in the direction of separating and the pinching to the braking plate is released, and the upper and lower underframes are released. The horizontal isolation of the electric gripper causes the pair of clamping pads of the electric gripper to move relative to each other along the length of the braking plate while the seismic isolation mechanism suppresses the shaking. Rukoto can.

【００４９】また、免震機構は、下部台枠と中間台枠と
の間、及び、中間台枠と上部台枠との間に下方台枠側に
接して転動するローラとこのローラに対して偏心し且つ
上方台枠側に接して転動するローラとを一体に設け、且
つ下方の免震機構と上方の免震機構とを互いに直角方向
に向けて配設してなるものであるから、地震発生時には
前後左右の水平方向の震動を免震機構の偏心ローラを介
してその震動エネルギーを吸収して上部台枠上に設置し
ている展示品や展示ケース等の揺れを著しく減衰させる
ことができるものである。Further, the seismic isolation mechanism includes a roller which rolls in contact with the lower underframe between the lower underframe and the intermediate underframe and between the intermediate underframe and the upper underframe. Eccentricity and a roller that rolls in contact with the upper underframe side are integrally provided, and the lower seismic isolation mechanism and the upper seismic isolation mechanism are arranged so as to face each other at right angles. When an earthquake occurs, the horizontal and vertical vibrations should be absorbed by the eccentric rollers of the seismic isolation mechanism to significantly reduce the shaking of the exhibits and display cases installed on the upper frame. Is something that can be done.

[Brief description of drawings]

【図１】免震台の一部縦断正面図、[Fig.1] Partial vertical front view of the seismic isolation stand,

【図２】免震台の下部台枠の平面図、[Fig. 2] A plan view of the lower frame of the seismic isolation table,

【図３】免震台の中間台枠の平面図、FIG. 3 is a plan view of an intermediate underframe of the seismic isolation table,

【図４】免震台の上部台枠の平面図、FIG. 4 is a plan view of the upper frame of the seismic isolation table,

【図５】免震機構の縦断正面図、FIG. 5 is a vertical sectional front view of the seismic isolation mechanism,

【図６】その左側面図、FIG. 6 is a left side view thereof,

【図７】その右側面図、FIG. 7 is a right side view thereof,

【図８】電動着脱機構の縦断側面図、FIG. 8 is a vertical sectional side view of the electric attachment / detachment mechanism,

【図９】その簡略側面図、FIG. 9 is a simplified side view thereof,

【図１０】震動感知器の簡略側面図、FIG. 10 is a simplified side view of the vibration sensor,

【図１１】制御配線回路図、FIG. 11 is a control wiring circuit diagram,

【図１２】展示ケース全体の簡略縦断正面図、FIG. 12 is a simplified vertical sectional front view of the entire display case,

【図１３】免震機構の別な構造を示す簡略側面図、FIG. 13 is a simplified side view showing another structure of the seismic isolation mechanism,

【図１４】免震機構のさらに別な構造を示す簡略側面
図。FIG. 14 is a simplified side view showing still another structure of the seismic isolation mechanism.

[Explanation of symbols]

１下部台枠２中間台枠３上部台枠４免震機構 42、43 大小径ローラ５電動着脱機構 5a 電動グリッパ 5b 制動プレート 57 パッド６震動感知器 62 感知体Ａ展示ケース 1 Lower frame 2 Middle frame 3 Upper frame 4 seismic isolation mechanism 42, 43 Large and small diameter rollers 5 Electric detachable mechanism 5a electric gripper 5b braking plate 57 pads 6 Vibration detector 62 sensor A display case

───────────────────────────────────────────────────── フロントページの続き (72)発明者早川邦夫大阪市阿倍野区松崎町２丁目２番２号株式会社奥村組内 (72)発明者辰浜哲郎大阪市西淀川区姫島３丁目５番26号奥村機械製作株式会社内 (72)発明者井手章大阪市西淀川区姫島３丁目５番26号奥村機械製作株式会社内 (56)参考文献特開平２−54040（ＪＰ，Ａ) 実開平４−13846（ＪＰ，Ｕ) 実開平４−13844（ＪＰ，Ｕ) 実開昭62−188641（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.⁷，ＤＢ名) A47B 97/00 A47F 7/02 F16F 15/02 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Kunio Hayakawa 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka City Okumura-gumi Co., Ltd. (72) Tetsuro Tatsuhama 3-5-26 Himejima, Nishiyodogawa-ku, Osaka Oku Mura Machinery Co., Ltd. (72) Inventor Akira Ide 3-526 Himejima, Nishiyodogawa-ku, Osaka City Okumura Machinery Co., Ltd. (56) Reference JP-A-2-54040 (JP, A) 4-13846 (JP, U) Actual development 4-13844 (JP, U) Actual development Sho 62-1888641 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) A47B 97/00 A47F 7/02 F16F 15/02

Claims

(57) [Claims]

1. An intermediate underframe mounted on a lower underframe fixed to an installation surface so as to be swingable in any of front, rear, left and right directions through a seismic isolation mechanism, and a seismic isolation mechanism over the intermediate underframe. Via an upper underframe mounted so as to be swingable in a direction orthogonal to the above-mentioned swinging direction, between the lower underframe and the intermediate underframe, and between the intermediate underframe and the upper underframe, respectively, and With an electric attachment / detachment mechanism that enables the connection and fixation to be released, and the occurrence of vibration above a certain level
A seismic isolation stand comprising an operating vibration detector, wherein the electric attachment / detachment mechanism is provided with an electric gripper having a pair of clamping pads.
And braking applied between the pressure pads of this electric gripper
Any of the above-mentioned underframes that consist of a plate
The electric gripper is attached to one of the underframes and the opposing surface of the pressing pad.
Fixed in a state where the space is oriented in the swing direction, and braked to the other underframe
The state where the plate is oriented with its length direction in the swing direction of the underframe
The electric gripper with the power turned on.
The clamping plate is clamped by the clamping pad
One for connecting and fixing the underframe, the intermediate underframe, and the upper underframe
On the other hand, when the above-mentioned vibration detector detects a vibration exceeding a predetermined level,
Deactivate the electric gripper to open the connection and fixation between the underframes.
A seismic isolation stand characterized by being configured so that

2. The seismic isolation mechanism integrally includes rollers that are eccentric to each other, and the seismic isolation mechanism is provided at several places between vertically opposed underframes so that the center is located above the center of the other roller. One roller is brought into contact with the lower underframe side to be rolled, and the other roller whose center is lower than the center of one roller is brought into contact with the upper underframe side to be rolled, In addition, the roller rolling direction of the seismic isolation mechanism provided between the lower underframe and the intermediate underframe is orthogonal to the roller rolling direction of the seismic isolation mechanism provided between the intermediate underframe and the upper underframe. The seismic isolation table according to claim 1, wherein the seismic isolation table is provided.

3. The seismic isolation stand according to claim 1 , wherein the exhibit is placed on the upper underframe.

4. The method of claim 1 which is configured to install a display case containing the exhibits on the upper mount frame, claim 2 or
The seismic isolation stand according to claim 3 .