JP2020190286A - Seismic isolator - Google Patents

Seismic isolator Download PDF

Info

Publication number
JP2020190286A
JP2020190286A JP2019095782A JP2019095782A JP2020190286A JP 2020190286 A JP2020190286 A JP 2020190286A JP 2019095782 A JP2019095782 A JP 2019095782A JP 2019095782 A JP2019095782 A JP 2019095782A JP 2020190286 A JP2020190286 A JP 2020190286A
Authority
JP
Japan
Prior art keywords
gantry
seismic isolation
isolation device
main body
container
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2019095782A
Other languages
Japanese (ja)
Inventor
祥広 後藤
Yoshihiro Goto
祥広 後藤
中野 欣治
Kinji Nakano
欣治 中野
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.)
Hitachi GE Nuclear Energy Ltd
Original Assignee
Hitachi GE Nuclear Energy Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi GE Nuclear Energy Ltd filed Critical Hitachi GE Nuclear Energy Ltd
Priority to JP2019095782A priority Critical patent/JP2020190286A/en
Publication of JP2020190286A publication Critical patent/JP2020190286A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

To provide a seismic isolator which can maintain seismic isolation performance by preventing the evaporation of liquid which is charged into a vessel for accommodating a pedestal.SOLUTION: A pedestal 2 has a pedestal main body 2A and a hangout part 2B protruding in a horizontal direction from an external peripheral face of the pedestal main body 2A in a prescribed position toward a lower part from an upper end of the pedestal main body 2A. An opening 5B through which an upper face of the pedestal main body 2A can be seen is formed at an upper plate part 5A of a vessel 5, one-side ends of a plurality of suspension materials 4 are connected to a lower face of the upper plate part 5A so as to be turnable, the other ends of the plurality of suspension materials 4 are connected to an upper face of the hangout part 2B so as to be turnable, liquid 6 is charged up to a position higher than an upper face of the hangout part 2B, and an interval between the external peripheral face of the pedestal main body 2A and an internal peripheral face of the opening 5B is covered with a sheet material 8.SELECTED DRAWING: Figure 1

Description

本発明は、免震装置に関する。 The present invention relates to a seismic isolation device.

原子力発電プラントにおいては、原子炉建屋等の内部に配置された機器に対して、地震時における機能評価が行われている。地震による機器の振動応答を低減するためには免震装置の適用が効果的であり、様々な免震装置が提案されている。免震装置に関する既往技術として特許文献1が挙げられる。 In a nuclear power plant, the functions of equipment placed inside a reactor building or the like are evaluated in the event of an earthquake. The application of seismic isolation devices is effective in reducing the vibration response of equipment due to earthquakes, and various seismic isolation devices have been proposed. Patent Document 1 is mentioned as a conventional technique relating to a seismic isolation device.

特許文献1には、地盤を掘削したピットの開口上部に渡した上部架台からワイヤにより中間架台を吊り下げ、上部架台の中央に左右に同じ剛性を持つばねを水平に取り付けると共に、それぞれのばねの一端にワイヤを接続し、この水平方向に移動可能なワイヤの他端は、上部架台に取り付けた滑車を介してピット内の中間架台に固定して、構造物を設置した中間架台を吊り下げ、ピット内では前記中間架台と構造物の一部、もしくは全部が液体中に沈められて構成した免震装置が記載されている。 In Patent Document 1, an intermediate pedestal is hung by a wire from an upper pedestal passed over the opening of a pit where the ground is excavated, and springs having the same rigidity are horizontally attached to the center of the upper pedestal, and each spring is attached. A wire is connected to one end, and the other end of the horizontally movable wire is fixed to an intermediate pedestal in the pit via a pulley attached to the upper pedestal to suspend the intermediate pedestal on which the structure is installed. In the pit, a seismic isolation device configured by submerging a part or all of the intermediate frame and the structure in a liquid is described.

この免震装置は、構造物を設置した中間架台をワイヤで吊り下げることにより振り子構造となっているため、水平方向に対する免震効果を持つ。また上下方向については、上部架台の中央からそれぞれ左右に取り付けられた同じ剛性を持つばねが働き、上部架台における上下方向の振動は、このばねにて免震されて構造物に入力される。さらに、中間架台と構造物の一部、もしくは全部が液体中にあることから、中間架台及び構造物に浮力が発生して、常時ばねやワイヤに加わる中間架台と構造物の自重による引っ張り荷重が低減される。 Since this seismic isolation device has a pendulum structure by suspending an intermediate frame on which the structure is installed with a wire, it has a seismic isolation effect in the horizontal direction. In the vertical direction, springs with the same rigidity attached to the left and right from the center of the upper gantry work, and the vibration in the vertical direction in the upper gantry is seismically isolated by this spring and input to the structure. Furthermore, since part or all of the intermediate gantry and the structure are in the liquid, buoyancy is generated in the intermediate gantry and the structure, and the tensile load due to the weight of the intermediate gantry and the structure that is constantly applied to the spring and the wire is applied. It will be reduced.

特開2004‐69067号公報Japanese Unexamined Patent Publication No. 2004-69067

上述した特許文献1に記載の免震装置では、吊り材であるワイヤを通すための穴が上部架台に設けられており、その穴からピット内の液体が蒸発することが想定される。ピット内の液体が蒸発すると、浮力を考慮して設計された吊り材に想定以上の荷重が作用することで吊り材が破断したり、流体による減衰が低下して免震性能が変化する可能性がある。 In the seismic isolation device described in Patent Document 1 described above, a hole for passing a wire as a hanging material is provided in the upper pedestal, and it is assumed that the liquid in the pit evaporates from the hole. When the liquid in the pit evaporates, the suspension material designed in consideration of buoyancy may be subjected to an unexpected load, causing the suspension material to break or the damping due to the fluid to decrease, resulting in a change in seismic isolation performance. There is.

本発明は、上記の課題に鑑みてなされたものであり、その目的は、架台を収容する容器に充填された液体の蒸発を防ぐことにより、免震性能を維持することが可能な免震装置を提供することにある。 The present invention has been made in view of the above problems, and an object of the present invention is a seismic isolation device capable of maintaining seismic isolation performance by preventing evaporation of a liquid filled in a container for accommodating a gantry. Is to provide.

上記目的を達成するために、本発明は、免震対象の構造物を支持する架台と、前記架台を収容する容器と、前記容器内で前記架台を吊り下げる複数の吊り材と、前記容器内に充填された液体とを備えた免震装置において、前記架台は、架台本体と、前記架台本体の上端から下方に向かって所定の位置に前記架台本体の外周面から水平方向に突出する張り出し部とを有しており、前記容器の上板部には、前記架台本体の上面が覗く開口が設けられており、前記複数の吊り材の各一端は、前記上板部の下面に回動自在に連結されており、前記複数の吊り材の各他端は、前記張り出し部の上面に回動自在に連結されており、前記液体は、前記張り出し部の上面よりも高い位置まで充填されており、前記架台本体の外周面と前記開口の内周面との間隙がシート材で覆われているものとする。 In order to achieve the above object, the present invention comprises a pedestal for supporting a structure to be seismically isolated, a container for accommodating the pedestal, a plurality of hanging materials for suspending the pedestal in the container, and the inside of the container. In the seismic isolation device provided with the liquid filled in, the gantry is a gantry main body and an overhanging portion that projects horizontally from the outer peripheral surface of the gantry main body at a predetermined position downward from the upper end of the gantry main body. The upper plate portion of the container is provided with an opening through which the upper surface of the gantry main body can be seen, and one end of each of the plurality of suspension members is rotatable on the lower surface of the upper plate portion. The other end of each of the plurality of hanging members is rotatably connected to the upper surface of the overhanging portion, and the liquid is filled to a position higher than the upper surface of the overhanging portion. It is assumed that the gap between the outer peripheral surface of the gantry body and the inner peripheral surface of the opening is covered with the sheet material.

以上のように構成した本発明によれば、構造物を設置した架台が吊り材を介して液体中に吊り下げられているため、地震の卓越振動数よりも低い固有振動数となる振り子となることで、水平方向の振動に対して免震効果を発揮する。また、架台本体の外周面から水平方向に突出する張り出し部が液体に浸漬しているため、架台が上下方向に振動した場合に架台の張り出し部の上下で圧力差が発生し、架台に減衰力が作用する。これより、液体がない状態と比較して構造物を上下方向の応答を低減することができる。また、架台本体の外周面と容器の開口の内周面との間隙がシート材で覆われており、液体が容器に密閉されているため、液体の蒸発に伴う免震性能の変化を防ぐことができる。また、液体が容器に密閉されていることで、架台が振動した時の液体の動きが制限されるため、減衰効果を大きくすることができる。 According to the present invention configured as described above, since the gantry on which the structure is installed is suspended in the liquid via a suspending material, the pendulum has a natural frequency lower than the predominant frequency of the earthquake. As a result, it exerts a seismic isolation effect against vibration in the horizontal direction. In addition, since the overhanging portion that protrudes horizontally from the outer peripheral surface of the gantry body is immersed in the liquid, when the gantry vibrates in the vertical direction, a pressure difference is generated above and below the overhanging portion of the gantry, and the damping force is applied to the gantry. Works. This makes it possible to reduce the vertical response of the structure as compared to the absence of liquid. In addition, the gap between the outer peripheral surface of the gantry body and the inner peripheral surface of the container opening is covered with a sheet material, and the liquid is sealed in the container to prevent changes in seismic isolation performance due to evaporation of the liquid. Can be done. Further, since the liquid is sealed in the container, the movement of the liquid when the gantry vibrates is restricted, so that the damping effect can be increased.

本発明に係る免震装置によれば、架台を収容する容器に充填された液体の蒸発を防ぐことにより、免震性能を維持することが可能となる。 According to the seismic isolation device according to the present invention, it is possible to maintain the seismic isolation performance by preventing the liquid filled in the container accommodating the gantry from evaporating.

本発明の第1の実施例に係る免震装置の断面図である。It is sectional drawing of the seismic isolation device which concerns on 1st Example of this invention. 本発明の第1の実施例に係る免震装置の平面図である。It is a top view of the seismic isolation device which concerns on 1st Example of this invention. 本発明の第2の実施例に係る免震装置の断面図である。It is sectional drawing of the seismic isolation device which concerns on 2nd Example of this invention. 本発明の第2の実施例の変形例に係る免震装置の断面図である。It is sectional drawing of the seismic isolation device which concerns on the modification of the 2nd Example of this invention. 本発明の第3の実施例に係る免震装置の断面図である。It is sectional drawing of the seismic isolation device which concerns on 3rd Example of this invention. 図5におけるA−A線断面図である。FIG. 5 is a cross-sectional view taken along the line AA in FIG. 本発明の第4の実施例における吊り材の側面図である。It is a side view of the suspension material in 4th Example of this invention. 図7におけるB−B線断面図である。FIG. 7 is a cross-sectional view taken along the line BB in FIG.

以下、本発明の実施の形態について、図面を参照して説明する。なお、各図中、同等の部材には同一の符号を付し、重複した説明は適宜省略する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the same members are designated by the same reference numerals, and duplicate description will be omitted as appropriate.

本発明の第1の実施例について、図1および図2を用いて説明する。 A first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

図1は、本実施例に係る免震装置の断面図である。免震装置9は、例えば原子力発電プラントの建物の床10に配置される。免震装置9は、免震対象となる構造物1を支持し、上に凸となる形状の架台2、上板部5Aに開口5Bを有し、液体6が充填されるケーシング5、架台2の張り出し部2Bの上面とケーシング5の上板部5Aの下面とを接続し、それぞれの接続部に回転自由である継ぎ手3が設けられている吊り材4、架台2の移動を拘束せず、架台2とケーシング5の開口5Bとの隙間を覆うシート材8からなる。 FIG. 1 is a cross-sectional view of the seismic isolation device according to the present embodiment. The seismic isolation device 9 is arranged, for example, on the floor 10 of a building of a nuclear power plant. The seismic isolation device 9 supports a structure 1 to be seismically isolated, has a pedestal 2 having a convex shape upward, has an opening 5B in the upper plate portion 5A, and has a casing 5 and a pedestal 2 filled with a liquid 6. The upper surface of the overhanging portion 2B and the lower surface of the upper plate portion 5A of the casing 5 are connected, and the movement of the suspension member 4 and the gantry 2 provided with the joints 3 which are free to rotate is not restricted. The sheet material 8 covers the gap between the gantry 2 and the opening 5B of the casing 5.

吊り材4と架台2からなる振り子の固有振動数は吊り材4の長さの平方根に反比例する関係があり、吊り材4の長さは、想定される地震の卓越振動数より低くなるように設定される。ケーシング5と架台2の間には、架台2が振動した際に架台2がケーシング5と衝突しないように隙間が設けられる。液体6としては例えば油が用いられ、吊り材4としてはワイヤが用いられ、シート材8としては伸縮自在なゴムシートが用いられる。 The natural frequency of the pendulum consisting of the suspension member 4 and the gantry 2 is inversely proportional to the square root of the length of the suspension member 4, so that the length of the suspension member 4 is lower than the predominant frequency of the assumed earthquake. Set. A gap is provided between the casing 5 and the gantry 2 so that the gantry 2 does not collide with the casing 5 when the gantry 2 vibrates. For example, oil is used as the liquid 6, a wire is used as the suspending material 4, and a stretchable rubber sheet is used as the sheet material 8.

図2は、本実施例に係る免震装置の平面図である。本例では、容器5に設けられる開口5Bは正方形であり、架台2は上方から見て正方形形状となっている。架台2の張り出し部2Bの角部(4箇所)が継ぎ手3および吊り材4を介してケーシング5の上板部5Aに支持される。 FIG. 2 is a plan view of the seismic isolation device according to the present embodiment. In this example, the opening 5B provided in the container 5 is square, and the gantry 2 has a square shape when viewed from above. The corners (4 points) of the overhanging portion 2B of the gantry 2 are supported by the upper plate portion 5A of the casing 5 via the joint 3 and the hanging member 4.

図1に示すように、構造物1および架台2は吊り材4によって、地震の卓越振動数よりも低い固有振動数となる振り子として振動することから、地震時は免震効果を発揮し、構造物1に入力される水平方向の振動を低減することができる。また、架台2は液体6中にあるため、振動時は液体6の粘性による減衰力が作用する。なお、架台2の外周面とケーシング5の開口5Bの内周面との隙間はシート材8で覆われているため、液体6が蒸発することはなく、免震性能は当初の状態から維持される。鉛直方向の地震が作用する場合は、架台2と構造物1が上下方向に振動するが、架台2の張り出し部2Bの上下で圧力差が発生するので、オイルダンパーのように作用し、架台2に減衰力が作用する。これにより、架台2の鉛直方向の応答を低減することができる。 As shown in FIG. 1, since the structure 1 and the gantry 2 vibrate as a pendulum having a natural frequency lower than the predominant frequency of the earthquake by the suspending material 4, the structure 1 exhibits a seismic isolation effect during an earthquake. It is possible to reduce the vibration in the horizontal direction input to the object 1. Further, since the gantry 2 is in the liquid 6, a damping force due to the viscosity of the liquid 6 acts during vibration. Since the gap between the outer peripheral surface of the gantry 2 and the inner peripheral surface of the opening 5B of the casing 5 is covered with the sheet material 8, the liquid 6 does not evaporate and the seismic isolation performance is maintained from the initial state. The casing. When a vertical earthquake acts, the gantry 2 and the structure 1 vibrate in the vertical direction, but since a pressure difference occurs above and below the overhanging portion 2B of the gantry 2, it acts like an oil damper, and the gantry 2 acts like an oil damper. The damping force acts on. As a result, the response of the gantry 2 in the vertical direction can be reduced.

原子力発電プラントにおいては、航空機が建物に衝突した際に発生する振動に対しても機器評価が求められるが、本発明においては、その振動はケーシング5、吊り材4、架台2を介して構造物1に入力される。すなわち、構造物1が直接床10に設置される条件よりも、構造物1までの振動伝達経路が長くなるため、距離減衰によって振動を小さくすることができる。 In a nuclear power plant, equipment evaluation is also required for vibration generated when an aircraft collides with a building, but in the present invention, the vibration is transmitted to a structure via a casing 5, a suspension member 4, and a gantry 2. Entered in 1. That is, since the vibration transmission path to the structure 1 is longer than the condition where the structure 1 is directly installed on the floor 10, the vibration can be reduced by the distance attenuation.

本実施例では、免震対象の構造物を支持する架台2と、架台2を収容する容器5と、容器5内で架台2を吊り下げる複数の吊り材4と、容器5内に充填された液体6とを備えた免震装置において、架台2は、架台本体2Aと、架台本体2Aの上端から下方に向かって所定の位置に架台本体2Aの外周面から水平方向に突出する張り出し部2Bとを有し、容器5の上板部5Aには、架台本体2Aの上面が覗く開口5Bが設けられており、複数の吊り材4の各一端は、上板部5Aの下面に回動自在に連結されており、複数の吊り材4の各他端は、張り出し部4Bの上面に回動自在に連結されており、液体6は、張り出し部2Bの上面よりも高い位置まで充填されており、架台本体2Aの外周面と開口5Bの内周面との間隙がシート材8で覆われている。 In this embodiment, the gantry 2 for supporting the structure to be seismically isolated, the container 5 for accommodating the gantry 2, a plurality of hanging members 4 for suspending the gantry 2 in the container 5, and the container 5 are filled. In the seismic isolation device provided with the liquid 6, the gantry 2 includes a gantry main body 2A and an overhanging portion 2B that projects horizontally from the outer peripheral surface of the gantry main body 2A at a predetermined position downward from the upper end of the gantry main body 2A. The upper plate portion 5A of the container 5 is provided with an opening 5B through which the upper surface of the gantry main body 2A can be seen, and one end of each of the plurality of hanging members 4 is rotatable on the lower surface of the upper plate portion 5A. The other ends of the plurality of suspending members 4 are rotatably connected to the upper surface of the overhanging portion 4B, and the liquid 6 is filled to a position higher than the upper surface of the overhanging portion 2B. The gap between the outer peripheral surface of the gantry main body 2A and the inner peripheral surface of the opening 5B is covered with the sheet material 8.

以上のように構成した本実施例によれば、構造物1を設置した架台2が吊り材4を介して液体6中に吊り下げられているため、架台2が水平方向に振動した場合に架台2に流体による減衰力が作用する。これにより、構造物1を水平方向の応答を小さくすることができる。また、架台本体2Aの外周面から水平方向に突出する張り出し部2Bが液体6に浸漬しているため、架台2が上下方向に振動した場合に架台2の張り出し部2Bの上下で圧力差が発生し、架台2に減衰力が作用する。これにより、構造物1を上下方向の応答を小さくすることができる。また、架台本体2Aの外周面と容器5の開口5Bの内周面との間隙がシート材8で覆われており、液体6が容器5に密閉されているため、液体6の蒸発に伴う免震性能の変化を防ぐことができる。また、液体6が容器5に密閉されていることで、架台2が振動した時の液体6の動きが制限されるため、減衰効果を大きくすることができる。 According to the present embodiment configured as described above, since the gantry 2 on which the structure 1 is installed is suspended in the liquid 6 via the suspension member 4, the gantry 2 is hung in the liquid 6 when the gantry 2 vibrates in the horizontal direction. The damping force due to the fluid acts on 2. As a result, the response of the structure 1 in the horizontal direction can be reduced. Further, since the overhanging portion 2B protruding in the horizontal direction from the outer peripheral surface of the gantry main body 2A is immersed in the liquid 6, a pressure difference occurs between the upper and lower overhanging portions 2B of the gantry 2 when the gantry 2 vibrates in the vertical direction. Then, a damping force acts on the gantry 2. As a result, the response of the structure 1 in the vertical direction can be reduced. Further, since the gap between the outer peripheral surface of the gantry main body 2A and the inner peripheral surface of the opening 5B of the container 5 is covered with the sheet material 8 and the liquid 6 is sealed in the container 5, the liquid 6 is isolated due to evaporation. It is possible to prevent changes in seismic performance. Further, since the liquid 6 is sealed in the container 5, the movement of the liquid 6 when the gantry 2 vibrates is restricted, so that the damping effect can be increased.

本発明の第2の実施例について、図3を用いて説明する。図3は、本実施例に係る免震装置の断面図である。 A second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view of the seismic isolation device according to this embodiment.

第1の実施例においては、架台2を収容する容器をケーシング5で構成し、ケーシング5を床10の上に設置する構成としたが、本実施例においては、架台2を収容する容器を床10に設けられたピット11で構成している。吊り材4の一端は、ピット11の上端付近に形成された張り出し部11Aの下面に回動可能に連結されている。その他の構成は、第1の実施例と同じである。 In the first embodiment, the container for accommodating the gantry 2 is composed of the casing 5, and the casing 5 is installed on the floor 10. However, in the present embodiment, the container for accommodating the gantry 2 is on the floor. It is composed of pits 11 provided in 10. One end of the suspending member 4 is rotatably connected to the lower surface of the overhanging portion 11A formed near the upper end of the pit 11. Other configurations are the same as in the first embodiment.

本実施例に係る免震装置9において、架台2を収容する容器は、地面または床10を掘削してなるピット11である。このような構造とすることで、第1の実施例と同一の機能を有しつつ、第1の実施例におけるケーシング5の高さの分だけ省スペースとすることができる。なお、本実施例の変形例として、図3の張り出し部11Aの代わりに図4に示す開口平板12を使用してもよい。 In the seismic isolation device 9 according to the present embodiment, the container for accommodating the gantry 2 is a pit 11 formed by excavating the ground or the floor 10. With such a structure, it is possible to save space by the height of the casing 5 in the first embodiment while having the same functions as those in the first embodiment. As a modification of this embodiment, the opening flat plate 12 shown in FIG. 4 may be used instead of the overhanging portion 11A in FIG.

本発明の第3の実施例について、図5および図6を用いて説明する。図5は、本実施例に係る免震装置の断面図である。図6は、図5におけるA−A線断面図である。 A third embodiment of the present invention will be described with reference to FIGS. 5 and 6. FIG. 5 is a cross-sectional view of the seismic isolation device according to this embodiment. FIG. 6 is a cross-sectional view taken along the line AA in FIG.

本実施例に係る免震装置では、架台本体2Aの下面に凹凸が形成されている。この凹凸により、液体6と架台2の接触面積が増えるため、水平方向に架台2が揺動した際の減衰力が大きくなり、振動振幅を小さくすることができる。なお、本実施例では凸部2Cの断面を四角形としたが、それ以外の形状としてもよく、その長さも架台2が上下方向に振動した際に、ピット11の底面と接触しない範囲で変更してもよい。また、凸部2Cの数も任意に変更することができる。 In the seismic isolation device according to this embodiment, unevenness is formed on the lower surface of the gantry main body 2A. Due to this unevenness, the contact area between the liquid 6 and the gantry 2 increases, so that the damping force when the gantry 2 swings in the horizontal direction increases, and the vibration amplitude can be reduced. In this embodiment, the cross section of the convex portion 2C is a quadrangle, but other shapes may be used, and the length thereof is also changed within a range that does not contact the bottom surface of the pit 11 when the gantry 2 vibrates in the vertical direction. You may. Further, the number of convex portions 2C can be arbitrarily changed.

本発明の第4の実施例について、図7および図8を用いて説明する。図7は、本実施例における吊り材4の側面図である。図8は、図7におけるB−B線断面図である。 A fourth embodiment of the present invention will be described with reference to FIGS. 7 and 8. FIG. 7 is a side view of the hanging member 4 in this embodiment. FIG. 8 is a cross-sectional view taken along the line BB in FIG.

本実施例に係る免震装置では、吊り材4の表面に、吊り材4の軸方向と直交する方向に突出する凸部4Aが形成されている。この凸部4Aにより、液体6と吊り材4の接触面積が増加するため、航空機衝突時の振動や鉛直方向の地震で想定される吊り材4の軸方向の振動に対して減衰力を大きくすることができる。なお、本実施例では凸部4Aは円盤形状としたが、それ以外の形状としてもよい。また、凸部4Aの数も任意に変更することができる。 In the seismic isolation device according to the present embodiment, a convex portion 4A protruding in a direction orthogonal to the axial direction of the suspending member 4 is formed on the surface of the suspending member 4. Since the contact area between the liquid 6 and the suspension member 4 increases due to the convex portion 4A, the damping force is increased against the vibration at the time of an aircraft collision and the axial vibration of the suspension member 4 assumed in a vertical earthquake. be able to. In this embodiment, the convex portion 4A has a disk shape, but other shapes may be used. Further, the number of convex portions 4A can be arbitrarily changed.

以上、本発明の実施形態について説明したが、本発明は前記実施形態に限定されることなく、その趣旨を逸脱しない範囲で適宜に変更が可能である。例えば、吊り材4はワイヤロープでなく、コイルばねや鋼棒としてもよく、架台2やケーシング5、ピット11の形状は長方形や円形としてもよい。吊り材4の本数は本例ではすべて4本で示していたが、それ以外の本数としてもよい。また、上記の実施例では1つの構造物1に対して、1台の免震装置9にて支持する例を記載したが、複数の免震装置9で構造物を支持してもよい。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be appropriately modified without departing from the spirit of the present invention. For example, the suspension member 4 may be a coil spring or a steel rod instead of a wire rope, and the shape of the gantry 2, the casing 5, and the pit 11 may be rectangular or circular. In this example, the number of hanging members 4 is all shown as 4, but other hanging members may be used. Further, in the above embodiment, the example in which one structure 1 is supported by one seismic isolation device 9 is described, but the structure may be supported by a plurality of seismic isolation devices 9.

1…構造物、2…架台、2A…架台本体、2B…張り出し部、2C…凸部、3…継ぎ手、4…吊り材、4A…凸部、5…ケーシング(容器)、5A…上板部、5B…開口、6…液体、8…シート材、9…免震装置、10…床、11…ピット(容器)、11A…張り出し部、12…開口平板。 1 ... Structure, 2 ... Stand, 2A ... Stand body, 2B ... Overhang, 2C ... Convex, 3 ... Joint, 4 ... Hanging material, 4A ... Convex, 5 ... Casing (container), 5A ... Top plate 5, 5B ... opening, 6 ... liquid, 8 ... sheet material, 9 ... seismic isolation device, 10 ... floor, 11 ... pit (container), 11A ... overhang, 12 ... opening flat plate.

Claims (4)

免震対象の構造物を支持する架台と、
前記架台を収容する容器と、
前記容器内で前記架台を吊り下げる複数の吊り材と、
前記容器内に充填された液体とを備えた免震装置において、
前記架台は、架台本体と、前記架台本体の上端から下方に向かって所定の位置に前記架台本体の外周面から水平方向に突出する張り出し部とを有しており、
前記容器の上板部には、前記架台本体の上面が覗く開口が設けられており、
前記複数の吊り材の各一端は、前記上板部の下面に回動自在に連結されており、
前記複数の吊り材の各他端は、前記張り出し部の上面に回動自在に連結されており、
前記液体は、前記張り出し部の上面よりも高い位置まで充填されており、
前記架台本体の外周面と前記開口の内周面との間隙がシート材で覆われている
ことを特徴とする免震装置。
A pedestal that supports the structure subject to seismic isolation,
A container for accommodating the gantry and
A plurality of hanging materials for suspending the gantry in the container,
In the seismic isolation device provided with the liquid filled in the container,
The gantry has a gantry main body and an overhanging portion that projects horizontally from the outer peripheral surface of the gantry main body at a predetermined position downward from the upper end of the gantry main body.
The upper plate portion of the container is provided with an opening through which the upper surface of the gantry body can be seen.
Each end of each of the plurality of suspending members is rotatably connected to the lower surface of the upper plate portion.
The other ends of the plurality of suspending members are rotatably connected to the upper surface of the overhanging portion.
The liquid is filled to a position higher than the upper surface of the overhanging portion.
A seismic isolation device characterized in that the gap between the outer peripheral surface of the gantry body and the inner peripheral surface of the opening is covered with a sheet material.
請求項1に記載の免震装置において、
前記容器は、地面または床を掘削してなるピットである
ことを特徴とする免震装置。
In the seismic isolation device according to claim 1,
The seismic isolation device is characterized in that the container is a pit formed by excavating the ground or floor.
請求項1に記載の免震装置において、
前記架台本体の下面に凹凸が形成されている
ことを特徴とする免震装置。
In the seismic isolation device according to claim 1,
A seismic isolation device characterized in that unevenness is formed on the lower surface of the gantry body.
請求項1に記載の免震装置において、
前記吊り材の表面に、前記吊り材の軸方向と直交する方向に突出する凸部が形成されている
ことを特徴とする免震装置。
In the seismic isolation device according to claim 1,
A seismic isolation device characterized in that a convex portion protruding in a direction orthogonal to the axial direction of the suspending material is formed on the surface of the suspending material.
JP2019095782A 2019-05-22 2019-05-22 Seismic isolator Pending JP2020190286A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019095782A JP2020190286A (en) 2019-05-22 2019-05-22 Seismic isolator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2019095782A JP2020190286A (en) 2019-05-22 2019-05-22 Seismic isolator

Publications (1)

Publication Number Publication Date
JP2020190286A true JP2020190286A (en) 2020-11-26

Family

ID=73454408

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2019095782A Pending JP2020190286A (en) 2019-05-22 2019-05-22 Seismic isolator

Country Status (1)

Country Link
JP (1) JP2020190286A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115163739A (en) * 2022-06-01 2022-10-11 广东职业技术学院 Ceramic machinery base

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115163739A (en) * 2022-06-01 2022-10-11 广东职业技术学院 Ceramic machinery base

Similar Documents

Publication Publication Date Title
JPH01131768A (en) Vibration damper for structure
JP5621101B1 (en) Seismic foundation for buildings
JP2020190286A (en) Seismic isolator
JP6378494B2 (en) Seismic isolation structure
JP6420012B1 (en) Passive vibration control device for buildings
JPH01131767A (en) Vibration damper for structure
JP2017174856A (en) Transformer toppling prevention device
JP2006342884A (en) Base isolation device
JP2004069067A (en) Base-isolating device
JP2020002545A (en) Pendulum type vibration control device
WO2014178109A1 (en) Gravity-balancing seismic base isolation device
JP4277185B2 (en) Additional damping mechanism for floating base-isolated structures
CN210178831U (en) Shock absorption and isolation device
JP2005249210A (en) Damping apparatus
RU2551574C1 (en) Kochetov's beaded mesh vibration isolator
JP5542858B2 (en) Gravity balance type seismic isolation device
JP2012202510A (en) Base isolation structure
JP2903075B2 (en) Multi-degree-of-freedom dynamic vibration absorber
CN209943418U (en) Buffering shock isolation device
CN111608455B (en) Three-dimensional shock insulation system
JP7245551B1 (en) Seismic isolation device for both table and hanger
JPH02147739A (en) Swaying damper device for structure
JPH02157369A (en) Vibration control device of structure
JPH09177371A (en) Bearing ball laid seismic isolation base
JPH049931B2 (en)