JP4067339B2 - Multi-function damping device - Google Patents

Multi-function damping device Download PDF

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Publication number
JP4067339B2
JP4067339B2 JP2002162844A JP2002162844A JP4067339B2 JP 4067339 B2 JP4067339 B2 JP 4067339B2 JP 2002162844 A JP2002162844 A JP 2002162844A JP 2002162844 A JP2002162844 A JP 2002162844A JP 4067339 B2 JP4067339 B2 JP 4067339B2
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Japan
Prior art keywords
valve
piston
main
oil passage
function
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JP2002162844A
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Japanese (ja)
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JP2003004096A (en
Inventor
章 西村
義英 内山
信義 村井
雅史 山本
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Takenaka Corp
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Takenaka Corp
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Description

【0001】
【発明の属する技術分野】
この発明は、免震構造物の免震層に設置され、地震時または強風時に減衰装置として働き、又は任意の位置で免震層の変形を阻止するロック機能も有し、更に地震後又は強風後に免震層の残留変形を原点へ復帰させる復元機能も併せ持つ多機能型減衰装置の技術分野に属する。
【0002】
【従来の技術】
従来、免震構造物の免震層に減衰装置を設置し、地震時又は強風時の外力に対する構造物の応答に減衰性を与え、振動及び変形を低減することは一般的に行われている(例えば特許第2528563号の高減衰装置など参照)。
【0003】
また、地震や強風の後、免震構造物の免震層に残留変形が発生した場合には、これを原点へ復帰させる手段として、別途にジャッキを設置し、強制変形を与えて復元させることも行われている。
【0004】
従来、免震層の変形を強制的に阻止するロック機能は格別設備されていない。このため、群発する弱小の地震や強風に応答してその都度免震層が振動して居住性を損ない、或いは免震装置が多数回の繰り返し変形を受けて疲労し、損傷を受ける懸念があった。
【0005】
いずれにしても従来、地震時等には減衰装置として働き、必要に応じて免震層の変形を阻止するロック機能、或いは地震後に免震層の残留変形を原点へ復帰させる復元機能を併せ持つ多機能型装置はなく、機能別に各装置を設置することが行われているにすぎない。
【0006】
【本発明が解決しようとする課題】
上述したような従来技術の現状によれば、地震や強風の後、免震構造物の免震層に発生した残留変形をジャッキにより原点へ復帰させるためには、ジャッキを複数個配置して行うほかなく、しかも残留変形が発生する度にジャッキを配置するので大変な労力を必要とした。
【0007】
従来、免震層の変形を強制的に阻止するロック機能が備わっていないため、群発する弱小の地震や強風に対しては、せいぜい減衰装置の性能を調整する程度で、格別な対処法は無いに等しかった。
【0008】
従って、本発明の目的は、単一の油圧シリンダ型の装置で、上述した減衰装置としての機能のみならず、必要に応じて免震層の変形を阻止するロック機能、更に地震後には免震層の残留変形を原点へ復帰させる復元機能を併せ持ち、各機能を必要な都度使い分けることが可能な多機能型減衰装置を提供することである。
【0009】
【課題を解決するための手段】
上述の課題を解決するための手段として、請求項1に記載した発明に係る多機能型減衰装置は、
免震構造物の免震層に設置され、減衰機能又は原点復帰機能若しくはロック機能をそれぞれ働く多機能型減衰装置であって、
油圧シリンダと、その中に内蔵されたピストン2及びそのピストンロッド10とで本体が構成され、その油圧制御回路を備えた構成であり、前記油圧シリンダ1が免震層を構成する一方の構造と連結され、前記ピストンロッド10を他方の構造と連結して設置されること、
前記ピストンは、その前後の油室4、5を連通させる油通路を備え、前記油通路には該通路を開閉する開閉弁が設置され、前記開閉弁を開閉制御する手段が設けられていること、
前記油圧シリンダにおける前記ピストンの前後の油室4、5に、油圧ポンプからの油圧を供給し又は排除する主油路11A、11Bが接続され、この主油路11A、11Bに主開閉弁12が設置され、前記主開閉弁12を開閉制御する手段13が設けられていること、
前記主油路11A、11Bの主開閉弁12を迂回して前記油圧シリンダ1における前記ピストン2の前後の油室4、5を短絡するバイパス30が設けられ、該バイパス30にリリーフバルブ16と逆止弁とを組み合わせリリーフバルブ16の設定値にしたがってピストン2の変位を制限する安全回路が設けられていること、
前記油圧制御回路は、ピストンの油通路の開閉弁を全開とし、主油路11A、11Bの主開閉弁12を全閉とした減衰機能状態、又はピストンの油通路の開閉弁を全閉とし、主油路11A、11Bの主開閉弁12を全開とした原点復帰機能状態、若しくはピストンの油通路の開閉弁を全閉とし、主油路11A、11Bの主開閉弁12も全閉としたロック機能状態で働く構成に切り替えられることを特徴とする。
【0011】
【発明の実施の形態】
請求項1に記載した発明に係る多機能型減衰装置は、図1〜図3に各機能の実施形態を概念的に示したように、免震構造物の免震層に設置されて、減衰機能と原点復帰機能及びロック機能をそれぞれ働くように使用される。
【0012】
この多機能型減衰装置は、油圧シリンダ1と、その中に内蔵されたピストン2とで本体が構成され、油圧制御回路3を備えた構成である。図中10はピストンロッドを示している。但し、図1〜図3は、油圧制御回路3を概要のみ示している。この多機能型減衰装置は、油圧シリンダ1が免震層を構成する一方の例えば振動体(免震構造物等)と連結され、ピストンロッド10は他方の例えば支持体へ連結して設置される。
【0013】
前記ピストン2は、図4に油圧制御回路3の詳しい実施例を示したように、前後の油室4、5を連通させる油通路6を備え、前記油通路には同油通路6を開閉する開閉弁7が設置され、更に前記開閉弁7を開閉制御する手段8が設けられている。前記の開閉弁7は一例として電磁弁(自動弁)であり、手段8はその電気制御回路である。
【0014】
前記油圧シリンダ1における前記ピストン2の前後の油室4、5に、油圧ポンプ9からの油圧を供給し又は排除する主油路11A、11Bが接続されている。この主油路11A、11Bにそれぞれ主開閉弁12が設置され、前記主開閉弁12を開閉制御する手段13が設けられている。前記の主開閉弁12は、手動弁又は電磁弁(自動弁)であり、手段8は操作ハンドル又は電気制御回路である。
【0015】
上記図4の油圧制御回路3は、
(1)図1のようにピストン2の油通路6の開閉弁を全開とし、主油路11A、11B それぞれの主開閉弁12を全閉とした減衰機能(ダンパー)の実施状態、
(2)図2のようにピストン2の油通路6の開閉弁を全閉とし、主油路11A、11B の主開閉弁12を全開とした原点復帰機能(ジャッキ)の実施状態、
(3)図3のようにピストン2の油通路6の開閉弁を全閉とし、主油路11A、11B の主開閉弁12も全閉としたロック機能の実施状態、
においてそれぞれ働く構成とされている。
【0016】
上記(1)のダンパー機能時には、油通路6の口径に基づく絞り作用により、オイルの流れ抵抗に相当する減衰作用が奏され、地震時又は強風時に免震層の減衰力を増大させ、免震構造物の応答を低減させる。
(2)のジャッキ機能時には、前後の油室4又は5へ供給された油圧の大きさと、ピストン2の受圧面積の大きさとの積で求められる駆動力がピストンロッド10に発生し、残留変形を生じた構造物を強制的に原点へ復元させる。
(3)のロック機能時には、油圧シリンダ1の各油室4、5に閉じこめられたオイルの非圧縮性によりピストン2及びピストンロッド10の位置が強固に固定される。よって、例えば風外力に対して免震層の振動防止、或いは振動の繰り返しによる免震装置の損傷を防止する、所謂フェイルセーフ的機能により免震層に変形を生じないようにロックする。
【0017】
ちなみに図4の油圧制御回路3を概説すると、油圧ポンプ9によって発生した油圧は、電磁切替え弁14による切替え作用により、前記二つの主油路11A又は11へと供給され、逆に戻り油は油タンク15へと戻される。従って、ピストン2の開閉弁7を全閉とし、主開閉弁12が全開とされているときは、正に油圧ジャッキとしての機能を発揮する。主開閉弁12を全閉としたダンパー機能時に、ピストン2の油通路6の口径の大きさで定まる最大減衰力を超える大きな外力が作用したときは、バイパス30のリリーフバルブ16の設定値にしたがってピストン2のが制限され、且つ油圧回路の安全性が確保される。ピストン2の開閉弁7及び主油路11A、11の主開閉弁12をそれぞれ全閉としたロック機能時には、オイルの流れが完全に止められる。このときも、最大ロック力を超える外力が作用したときは、やはり、バイパス30のリリーフバルブ16の設定値により油圧回路の安全性が保たれる。
【0018】
なお、上記ダンパー機能時と、ジャッキ機能時及びロック機能時の切替えは、基本的には手動操作によるが、振動センサーの計測値に基いて自動制御による切替えを採用することも実施される。
【0019】
次に、図5には、図4のようにピストン2へ油通路6を設けないで、開閉弁7を設置する加工の面倒さを回避する構成の参考を示す
【0020】
即ち、油圧シリンダ1におけるピストン2の前室及び後室へ油圧ポンプ9からの油圧を供給する主油路11A、11の各主開閉弁12を迂回して、前記前室と後室を連絡させるバイパス油路23が設けられ、該バイパス油路23に開閉弁21と絞り20が設置され、前記開閉弁21の開閉手段22が設けられた構成を特徴とする。その他の構成は図4と共通する。
【0021】
従って、開閉弁21と絞り20が図4のピストン2に設けた開閉弁7と油通路6に相当する働きをして、図4の実施例と全く同様に減衰機能、原点復帰機能、及びロック機能に使い分けることができる。
【0022】
【本発明が奏する効果】
請求項1記載の発明に係る多機能型減衰装置によれば、単一の油圧シリンダ型の装置で、減衰装置としての機能のみならず、免震層の変形を阻止するロック機能、並びに地震後に免震層の残留変形を原点へ復帰させる原点復帰機能を併せ持ち、各機能を必要に応じて使い分けることが可能であるから、免震構造物の機能及び品質の向上と、設備の簡素化、及び設備費及びランニングコストの低減を図れ、免震構造物のフェイルセーフ的機能の向上に大きく寄与することができる。
【図面の簡単な説明】
【図1】本発明の多機能型減衰装置のダンパー機能時を示した概念図である。
【図2】本発明の多機能型減衰装置のジャッキ機能時を示した概念図である。
【図3】本発明の多機能型減衰装置のロック機能時を示した概念図である。
【図4】請求項1記載の多機能型減衰装置の実施例を示した説明図である。
【図5】機能型減衰装置の参考例を示した説明図である。
【符号の説明】
1 油圧シリンダ
2 ピストン
3 油圧制御回路
4、5 油室
6 油通路
7 開閉弁
8 開閉制御手段
9 油圧ポンプ
11A、11B 主油路
12 主開閉弁
13 開閉制御手段
23 バイパス油路
21 開閉弁
20 絞り
22 開閉手段
[0001]
BACKGROUND OF THE INVENTION
This invention is installed in the seismic isolation layer of the seismic isolation structure, functions as a damping device during an earthquake or strong wind, or has a lock function to prevent deformation of the seismic isolation layer at an arbitrary position, and further after the earthquake or strong wind It belongs to the technical field of multifunctional damping devices that also have a restoring function to return the residual deformation of the seismic isolation layer to the origin later.
[0002]
[Prior art]
Conventionally, it has been generally performed to install a damping device in the seismic isolation layer of the seismic isolation structure, to provide damping to the response of the structure to external forces during earthquakes or strong winds, and to reduce vibration and deformation (For example, refer to the high attenuation device of Japanese Patent No. 2528563).
[0003]
In addition, if a residual deformation occurs in the seismic isolation layer of the seismic isolation structure after an earthquake or strong wind, a separate jack should be installed and restored by applying a forced deformation as a means to restore it to the origin. Has also been done.
[0004]
Conventionally, there is no specially equipped lock function that forcibly prevents deformation of the seismic isolation layer. For this reason, there is a concern that the seismic isolation layer vibrates each time in response to swarms of weak earthquakes and strong winds, resulting in a loss of habitability, or the seismic isolation device undergoes many repeated deformations to cause fatigue and damage. It was.
[0005]
In any case, it has traditionally worked as an attenuation device in the event of an earthquake, etc., and has a lock function that prevents deformation of the base isolation layer as needed, or a restoration function that returns residual deformation of the base isolation layer to the origin after the earthquake. There is no functional device, and each device is merely installed according to function.
[0006]
[Problems to be solved by the present invention]
According to the current state of the art as described above, a plurality of jacks are arranged in order to return the residual deformation generated in the seismic isolation layer of the seismic isolation structure to the origin after the earthquake or strong wind. In addition, a great deal of effort was required because a jack was placed each time residual deformation occurred.
[0007]
Conventionally, since there is no lock function to forcibly prevent the deformation of the seismic isolation layer, there is no special countermeasure against swarming weak earthquakes and strong winds, just adjusting the performance of the damping device at best. It was equal.
[0008]
Accordingly, the object of the present invention is not only a function as a damping device as described above, but also a lock function that prevents deformation of the seismic isolation layer as needed, and further, a seismic isolation after an earthquake. Another object of the present invention is to provide a multi-function damping device that has a restoring function for returning the residual deformation of the layer to the origin, and can use each function properly whenever necessary.
[0009]
[Means for Solving the Problems]
As a means for solving the above-mentioned problem, a multi-function attenuation device according to the invention described in claim 1 is:
A multi-function type damping device that is installed in the seismic isolation layer of the seismic isolation structure and functions as a damping function, a return to origin function, or a lock function,
The hydraulic cylinder 1 , the piston 2 incorporated therein, and the piston rod 10 constitute a main body, and the hydraulic cylinder 1 includes a hydraulic control circuit 3. The hydraulic cylinder 1 constitutes a seismic isolation layer. Connected to a structure, and the piston rod 10 is installed in connection with the other structure;
The piston 2 includes an oil passage 6 for communicating the oil chambers 4 and 5 before and after the piston 2 , and an opening / closing valve 7 for opening and closing the passage is installed in the oil passage 6, and means 8 for controlling the opening / closing of the opening / closing valve 7. Is provided,
Main oil passages 11A and 11B for supplying or removing hydraulic pressure from a hydraulic pump 9 are connected to oil chambers 4 and 5 before and after the piston 2 in the hydraulic cylinder 1 , and the main oil passages 11A and 11B are mainly opened and closed. A valve 12 is provided, and means 13 for controlling the opening and closing of the main on-off valve 12 is provided,
A bypass 30 is provided to bypass the main on-off valve 12 of the main oil passages 11A and 11B and short-circuit the oil chambers 4 and 5 before and after the piston 2 in the hydraulic cylinder 1, and the bypass 30 is opposite to the relief valve 16. A safety circuit for limiting the displacement of the piston 2 according to the set value of the relief valve 16 in combination with a stop valve;
The hydraulic control circuit 3, the on-off valve 7 oil passage 6 of the piston 2 is fully opened, the main oil passage 11A, the main on-off valve 12 and 11B fully closed and the attenuation function state, or of the piston 2 of the oil passage 6 the on-off valve 7 is fully closed, and the main oil passage 11A, the main on-off valve 12 the homing functions fully opened state of 11B, or the opening and closing valve 7 oil passage 6 of the piston 2 is fully closed, the main oil passage 11A, 11B of the main on-off valve 12 is also characterized in that it is switched to the configuration work in the state of the lock function is fully closed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The multi-function damping device according to the first aspect of the present invention is installed in the seismic isolation layer of the seismic isolation structure as shown in FIGS. Function, origin return function and lock function are used to work respectively.
[0012]
This multifunctional damping device has a hydraulic cylinder 1 and a piston 2 built in the hydraulic cylinder 1 and a hydraulic control circuit 3. In the figure, reference numeral 10 denotes a piston rod. However, FIGS. 1 to 3 show only the outline of the hydraulic control circuit 3. In this multi-function damping device, the hydraulic cylinder 1 is connected to one of the vibrating bodies (such as a base isolation structure) constituting the base isolation layer, and the piston rod 10 is connected to the other base, for example, and installed. .
[0013]
The piston 2 includes an oil passage 6 for communicating the front and rear oil chambers 4 and 5 as shown in a detailed embodiment of the hydraulic control circuit 3 in FIG. 4, and opens and closes the oil passage 6 in the oil passage. An opening / closing valve 7 is installed, and further, means 8 for controlling opening / closing of the opening / closing valve 7 is provided. The on-off valve 7 is an electromagnetic valve (automatic valve) as an example, and the means 8 is an electric control circuit thereof.
[0014]
Main oil passages 11A and 11B for supplying or removing hydraulic pressure from the hydraulic pump 9 are connected to oil chambers 4 and 5 before and after the piston 2 in the hydraulic cylinder 1. A main opening / closing valve 12 is installed in each of the main oil passages 11A, 11B, and means 13 for controlling the opening / closing of the main opening / closing valve 12 is provided. The main on-off valve 12 is a manual valve or an electromagnetic valve (automatic valve), and the means 8 is an operation handle or an electric control circuit.
[0015]
The hydraulic control circuit 3 in FIG.
(1) An implementation state of a damping function (damper) in which the on-off valve of the oil passage 6 of the piston 2 is fully opened and the main on-off valve 12 of each of the main oil passages 11A, 11B is fully closed as shown in FIG.
(2) Implementation state of an origin return function (jack) in which the on-off valve of the oil passage 6 of the piston 2 is fully closed and the main on-off valve 12 of the main oil passages 11A, 11B is fully opened as shown in FIG.
(3) An implementation state of the lock function in which the on-off valve of the oil passage 6 of the piston 2 is fully closed and the main on-off valve 12 of the main oil passages 11A, 11B is also fully closed as shown in FIG.
Each of them is configured to work.
[0016]
During the damper function (1) above, the damping action based on the diameter of the oil passage 6 provides a damping action equivalent to the oil flow resistance, increasing the damping force of the base isolation layer during an earthquake or strong wind, Reduce the response of the structure.
During the jack function (2), the driving force required by the product of the magnitude of the hydraulic pressure supplied to the front and rear oil chambers 4 and 5 and the magnitude of the pressure receiving area of the piston 2 is generated in the piston rod 10 to cause residual deformation. The generated structure is forcibly restored to the origin.
During the locking function (3) , the positions of the piston 2 and the piston rod 10 are firmly fixed by the incompressibility of the oil confined in the oil chambers 4 and 5 of the hydraulic cylinder 1. Therefore, for example, the seismic isolation layer is locked so as not to be deformed by a so-called fail-safe function that prevents vibration of the seismic isolation layer against wind external force or prevents damage to the seismic isolation device due to repeated vibration.
[0017]
Incidentally To give a general description of the hydraulic control circuit 3 in FIG. 4, the hydraulic pressure generated by the hydraulic pump 9, by the action switching the electromagnetic switching valve 14, the two is supplied to the main oil passage 11A or 11 B, oil return conversely It is returned to the oil tank 15. Therefore, when the on-off valve 7 of the piston 2 is fully closed and the main on-off valve 12 is fully opened, the function as a hydraulic jack is exhibited. When a large external force exceeding the maximum damping force determined by the size of the diameter of the oil passage 6 of the piston 2 is applied during the damper function with the main on-off valve 12 fully closed, the set value of the relief valve 16 of the bypass 30 is applied. Displacement of the piston 2 is limited, and the safety of the hydraulic circuit is ensured. Off valve 7 and the main oil passage 11A of the piston 2, 11 B of the main on-off valve 12 when the lock function is fully closed, respectively, the flow of oil is completely stopped. Also at this time, when an external force exceeding the maximum locking force is applied, the safety of the hydraulic circuit is maintained by the set value of the relief valve 16 of the bypass 30 .
[0018]
Note that switching between the damper function, the jack function, and the lock function is basically performed by manual operation, but switching by automatic control based on the measurement value of the vibration sensor may be employed.
[0019]
Next, FIG. 5, without providing an oil passage 6 to the piston 2 as shown in FIG. 4, showing a reference example of a configuration to avoid the hassle of processing for installing an on-off valve 7.
[0020]
That is, bypassing the respective main-off valve 12 of the supply main oil passage 11A, 11 B the hydraulic pressure from the hydraulic pump 9 to the front chamber and a rear chamber of the piston 2 in the hydraulic cylinders 1, contact the front chamber and the rear chamber The bypass oil passage 23 is provided, the on-off valve 21 and the throttle 20 are installed in the bypass oil passage 23, and the on-off means 22 of the on-off valve 21 is provided. Other configurations are the same as those in FIG.
[0021]
Accordingly, the on-off valve 21 and the throttle 20 function corresponding to the on-off valve 7 and the oil passage 6 provided in the piston 2 of FIG. 4, and the damping function, the origin returning function, and the lock are exactly the same as in the embodiment of FIG. It can be properly used for the function.
[0022]
[Effects of the present invention]
According to the multi-function damping device according to the invention of claim 1 Symbol placement, a single hydraulic cylinder type device functions not only as a damping device, locking function of preventing deformation of the base isolation layer, and earthquakes It also has an origin return function to return residual deformation of the seismic isolation layer to the origin later, and it is possible to use each function properly as necessary, improving the function and quality of the seismic isolation structure, simplifying the equipment, In addition, the facility cost and running cost can be reduced, which can greatly contribute to the improvement of the fail-safe function of the seismic isolation structure.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing a damper function of a multifunctional damping device of the present invention.
FIG. 2 is a conceptual diagram showing a jack function of the multifunctional attenuation device of the present invention.
FIG. 3 is a conceptual diagram showing a lock function of the multifunctional attenuation device of the present invention.
FIG. 4 is an explanatory view showing an embodiment of the multi-function attenuation device according to claim 1;
FIG. 5 is an explanatory diagram showing a reference example of a multi- function attenuation device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hydraulic cylinder 2 Piston 3 Hydraulic control circuit 4, 5 Oil chamber 6 Oil passage 7 On-off valve 8 Opening / closing control means 9 Hydraulic pump
11A, 11B main oil passage 12 main on-off valve 13 on-off control means 23 bypass oil passage 21 on-off valve 20 throttling 22 on-off means

Claims (1)

免震構造物の免震層に設置され、減衰機能又は原点復帰機能若しくはロック機能をそれぞれ働く多機能型減衰装置であって、
油圧シリンダと、その中に内蔵されたピストン及びそのピストンロッドとで本体が構成され、その油圧制御回路を備えた構成であり、前記油圧シリンダが免震層を構成する一方の構造と連結され、前記ピストンロッドを他方の構造と連結して設置されること、
前記ピストンは、その前後の油室を連通させる油通路を備え、前記油通路には該通路を開閉する開閉弁が設置され、前記開閉弁を開閉制御する手段が設けられていること、
前記油圧シリンダにおける前記ピストンの前後の油室に、油圧ポンプからの油圧を供給し又は排除する主油路が接続され、この主油路に主開閉弁が設置され、前記主開閉弁を開閉制御する手段が設けられていること、
前記主油路の主開閉弁を迂回して前記油圧シリンダにおける前記ピストンの前後の油室を短絡するバイパスが設けられ、該バイパスにリリーフバルブと逆止弁とを組み合わせリリーフバルブの設定値にしたがってピストンの変位を制限する安全回路が設けられていること、
前記油圧制御回路は、ピストンの油通路の開閉弁を全開とし、主油路の主開閉弁を全閉とした減衰機能状態、又はピストンの油通路の開閉弁を全閉とし、主油路の主開閉弁を全開とした原点復帰機能状態、若しくはピストンの油通路の開閉弁を全閉とし、主油路の主開閉弁も全閉としたロック機能状態で働く構成に切り替えられることを特徴とする、多機能型減衰装置。
A multi-function damping device that is installed in the seismic isolation layer of the seismic isolation structure and functions as a damping function, a return to origin function, or a locking function,
The main body is constituted by a hydraulic cylinder, a piston built in the piston and the piston rod , and the hydraulic cylinder is provided with the hydraulic control circuit, and the hydraulic cylinder is connected to one structure constituting the seismic isolation layer, The piston rod is installed in connection with the other structure;
The piston includes an oil passage that communicates the oil chambers before and after the piston, and the oil passage is provided with an opening / closing valve that opens and closes the passage, and is provided with a means for controlling the opening / closing of the opening / closing valve.
A main oil passage for supplying or removing hydraulic pressure from a hydraulic pump is connected to oil chambers before and after the piston in the hydraulic cylinder, and a main on-off valve is installed in the main oil passage, and the main on-off valve is controlled to open / close. That there is a means to
A bypass is provided that bypasses the main opening / closing valve of the main oil passage and short-circuits the oil chambers before and after the piston in the hydraulic cylinder, and a combination of a relief valve and a check valve is combined with the bypass according to the set value of the relief valve A safety circuit is provided to limit the displacement of the piston;
The hydraulic control circuit is in a state of a damping function in which the opening / closing valve of the piston oil passage is fully opened and the main opening / closing valve of the main oil passage is fully closed, or the opening / closing valve of the piston oil passage is fully closed, the main on-off valve was fully open the homing function state, or the on-off valve of the oil passage of the piston is fully closed, it is switched to the configuration work in the main on-off valve also lock functions fully closed state of the main oil passage Multi-function type attenuation device characterized by
JP2002162844A 1999-01-08 2002-06-04 Multi-function damping device Expired - Fee Related JP4067339B2 (en)

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JP5840501B2 (en) * 2012-01-06 2016-01-06 株式会社日立製作所 Guide assembly and elevator apparatus
JP5259868B1 (en) * 2012-10-26 2013-08-07 孝典 佐藤 Seismic isolation system for structures
JP6263032B2 (en) * 2014-01-23 2018-01-17 カヤバ システム マシナリー株式会社 damper
CN107191530B (en) * 2017-05-26 2019-02-01 中国民航大学 A kind of twin coil piston magneto-rheological liquid shimmy-damper
IT201900007881A1 (en) * 2019-06-03 2020-12-03 Piaggio & C Spa ROLLING MOTORCYCLE WITH ROLLING BLOCK SYSTEM ACTING ON THE SHOCK ABSORBER
CN111058239A (en) * 2019-12-20 2020-04-24 长沙中联消防机械有限公司 Locking component, locking system, washing vehicle and locking method
CN112303167B (en) * 2020-11-19 2022-05-17 扬中市兴鸿车辆配件有限公司 Hydraulic shock absorber with independently suspended damping and hydraulic damping system thereof

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