JP2006342933A - Rocking preventing device for base-isolation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rocking preventing device of simple and low-costed structure facilitated in position adjustment of a plurality of rocking restricting cylinders, which are provided in a cylinder connected structure, and connecting rods and capable of preventing rocking by resisting a sudden movement of a load to the connecting rod. <P>SOLUTION: This rocking preventing device 41 is provided for a base-isolation system structured of the rocking preventing device 41 having cylinder connected structures 26 formed by connecting pistons 16 of a plurality of rocking restricting cylinders 15, which are connected to a cylinder pressurization chamber of a compound body provided under a base-isolated structure and an accumulator, to each other through connecting rods 17 and arranged in the periphery of the base-isolated material and having a movement synchronizing device for connecting both ends of the cylinder connected structures to each other to transmit a moving load of one connecting rod to the other connecting rod, and a plurality of three-dimensional base-isolating devices arranged under the base-isolated structure. The piston 16 of each of the rocking restricting cylinders 15 of the cylinder connected structure 26 is formed with a small opening 51 for communicating liquid chambers A and B formed on both sides of the piston 16 with each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention makes it possible to easily adjust the position of a plurality of locking restraining cylinders and connecting rods provided in a cylinder connecting body with a simple and inexpensive structure, and resists a sudden movement load on the connecting rods and locks them. The present invention relates to a locking prevention device for a seismic isolation system that can be prevented.

  Conventionally, as a device for isolating a large weight seismic isolation object such as a building or a nuclear power generation facility, a hydraulic seismic isolation device (3) in which a hydraulic chamber of a load supporting cylinder is connected to an air accumulator. Dimensional seismic isolation devices) have been proposed, and this type of hydraulic seismic isolation device is disclosed in Patent Document 1.

  FIG. 6 shows a hydraulic seismic isolation device disclosed in Patent Document 1, in which a thin rubber 2a and a thin steel plate 2b are stacked on a foundation 1 so as to perform lateral (horizontal) seismic isolation. The laminated rubber 2 is fixed, and a composite 39 in which the load supporting cylinder 3 is stacked and fixed on the laminated rubber 2 is configured. The load support cylinder 3 of the composite 39 has a piston 6 whose upper end is fitted to, for example, a substantially spherical swivel 5 fixed so as to protrude downward on the bottom surface of the seismic isolation object 4 that performs seismic isolation. A cylinder pressurizing chamber 8 is formed between the inner bottom surface of the cylinder 7 surrounding the piston 6 and the lower end of the piston 6. By connecting the cylinder pressurizing chamber 8 to the accumulator 10, the hydraulic pressure relief is achieved. The seismic device M is configured. In the figure, reference numeral 13 denotes a sealing material for the piston 6 and the cylinder 7.

  A hydraulic fluid such as oil is supplied to the cylinder pressurizing chamber 8, and a gas chamber is formed in the accumulator 10 by a flexible partition wall 11, and the hydraulic fluid in the cylinder pressurizing chamber 8 operates. A gas such as air inside the gas chamber 12 is compressed by being guided to the accumulator by the liquid pipe 9. The accumulator 10 may be fixed to the seismic isolation object 4 side by a fixing member 14 as shown in FIG. 6, or may be fixed to the foundation 1 side by a fixing member (not shown). The swivel 5 is for absorbing the inclination of the complex 39 when the foundation 1 is moved relative to the seismic isolation object 4 in the lateral direction due to an earthquake. Such a swivel 5 is provided. There are those that do not, and those that absorb the tilt of the hydraulic seismic isolation device M by other methods.

  As shown in FIG. 7, a large number of the hydraulic seismic isolation devices M are regularly arranged below the seismic isolation target 4, and the weight of the seismic isolation target 4 is the swivel 5 of each hydraulic seismic isolation device M. Then, it is transmitted to the hydraulic fluid in the cylinder pressurizing chamber 8 via the piston 6 and further transmitted from the cylinder 7 to the foundation 1 via the laminated rubber 2. The hydraulic fluid in the cylinder pressurizing chamber 8 pressurized by the weight of the seismic isolation object 4 is transmitted to the accumulator 10 through the hydraulic fluid pipe 9 and compresses the air in the gas chamber 12 through the flexible partition wall 11. Thus, the seismic isolation object 4 is held at a certain height.

  When the foundation 1 vibrates in the vertical direction due to the occurrence of an earthquake, the laminated rubber 2 and the cylinder 7 move up and down with respect to the piston 6 together with the foundation 1, and the movement of the foundation pressurizing chamber 8 decreases (the foundation 1 The hydraulic fluid in the cylinder pressurizing chamber 8 is supplied to the accumulator 10 at the time of (up), and the hydraulic fluid in the accumulator 10 is supplied to the cylinder pressurizing chamber at the time of the movement in which the interval between the cylinder pressurizing chambers 8 increases (the base 1 is lowered). 8, the shock of vibration is attenuated by the flow resistance of the hydraulic fluid pipe 9, and the seismic isolation object 4 is softly supported by the compression elasticity of the air in the gas chamber 12 of the accumulator 10. The Therefore, the load support cylinder 3 connected to the accumulator 10 effectively works only for buffering the vibration of the foundation 1 in the vertical direction.

  In addition, when the foundation 1 vibrates in the lateral direction due to the occurrence of an earthquake, the laminated rubber 2 bends and deforms in the lateral direction in accordance with the movement, whereby the seismic isolation object 4 is isolated in the lateral direction. The When the foundation 1 moves in the lateral direction, the composite rubber 39 receives a force for tilting the laminated rubber 2 with respect to the load supporting cylinder 3 because the laminated rubber 2 is displaced laterally and deforms. Is prevented from generating an excessive force by rotating around the swivel 5 and bending. Therefore, as described above, the hydraulic seismic isolation device M including the load supporting cylinder 3 and the laminated rubber 2 in which the cylinder pressurizing chamber 8 is connected to the accumulator 10 enables three-dimensional seismic isolation.

  On the other hand, even if a large number of hydraulic seismic isolation devices M as shown in FIG. 6 are arranged below the seismic isolation object 4 as shown in FIG. 7, the seismic isolation with a high center of gravity as shown in FIG. When the object 4 is isolated, it is considered that the seismic isolation object 4 may be rocked (oscillating back and forth or left and right) due to the earthquake. The cylinder 7 of the hydraulic seismic isolation device M arranged at the outer peripheral portion moves up and down with a larger stroke than the hydraulic seismic isolation device M arranged at the center of the lower part 4.

  However, it is very difficult to design a hydraulic seismic isolation device M that can be allowed to move up and down with such a large stroke and that can softly support the seismic isolation object 4, and the configuration of the device becomes very large. There is a problem that it ends up.

  In order to solve this problem, in Patent Document 1, as shown in FIGS. 7 to 10, a plurality of hydraulic seismic isolation devices M are arranged at the lower part of the seismic isolation object 4 as described above. An anti-rocking device 41 is provided at the lower peripheral edge of the seismic object 4 to constitute a seismic isolation system.

  As shown in FIG. 7, the locking prevention device 41 includes a cylinder coupling body 26 having a configuration in which pistons 16 of a plurality of rod-type locking suppression cylinders 15 are linearly coupled by a coupling rod 17. When the seismic isolation object 4 is rectangular, it arrange | positions along each 4 sides of a periphery.

  Further, as shown in FIG. 8, a composite 39 having a structure in which the laminated rubber 2 and the load supporting cylinder 3 are integrally stacked is sandwiched between the cylinder coupling body 26 at the lower peripheral edge of the seismic isolation object 4. Arranged in two rows. 8 fixes the laminated rubber 2 on the foundation 1, while fixing the cylinder 7 of the load support cylinder 3 to the lower surface of the seismic isolation object 4, and the piston 6 of the load support cylinder 3. The case where the fixing member 5a having the swivel 5 fitted to is fixed to the laminated rubber 2 is shown. In the figure, reference numeral 40 denotes a sliding member provided on the outer periphery of the piston 6.

  The composite bodies 39 arranged in two rows so as to sandwich the cylinder coupling body 26 are partitioned into a set of four blocks 19 (19a, 19b, 19c, 19d) as shown in FIG. As shown in FIG. 10, the hydraulic fluid pipes 9 connected to the cylinder pressurizing chamber 8 of the load supporting cylinder 3 are gathered into one collective pipe 20, and the corresponding locking suppression cylinders 15 (15a, 15b, 15c, 15d) are assembled. It is connected to the liquid chamber A on one side. At this time, as shown in FIG. 7, the hydraulic fluid pipe 9 is disposed on the same side (for example, the front side in the rotational direction) of the piston 16 of each locking suppression cylinder 15 in the direction of rotation along the cylinder coupling body 26 disposed on the outer peripheral portion. Each is connected to the liquid chamber A.

  Further, the liquid chamber B on the other side of each locking suppression cylinder 15a, 15b, 15c, 15d has a flexible partition wall 11 inside as shown in FIG. 12 is connected to an accumulator 25 that compresses gas such as air inside. Further, in the illustrated example, an auxiliary accumulator 29 is connected to the gas chamber 12 of the accumulator 25 via a connecting pipe 28, and the connecting pipe 28 has a throttle 30 that can set a flow passage cross-sectional area. Is provided. The auxiliary accumulator 29 may not be provided.

  Further, as shown in FIG. 10, hydraulic fluid of a predetermined pressure is supplied from the hydraulic device 21 via the manifold 22 and the hydraulic piping 23 to each of the collecting pipes 20 communicating with the fluid chamber A. It is possible to set and adjust the tilt of the seismic object 4. The hydraulic pipe 23 may be directly connected to the liquid chamber A on one side of each locking suppression cylinder 15a, 15b, 15c, 15d. The hydraulic chamber B on the other side of each of the locking suppression cylinders 15a, 15b, 15c, and 15d is supplied with a constant pressure of hydraulic fluid from the hydraulic device 21 via a manifold 22 and a hydraulic pipe 24. Yes.

  In order to prevent the seismic isolation object 4 from being locked by the cylinder coupling body 26, one of the connecting rods 17 is pushed and pulled between the ends of the cylinder coupling body 26 positioned at the corner of the seismic isolation object 4. In order to transmit the movement as a push-pull to the other connecting rod 17 by changing the direction by 90 ° (moving so that each connecting rod 17 arranged along the periphery of the seismic isolation object 4 rotates in the same direction in a plane). It is necessary to provide a mobile synchronization device (a corner-linking mechanism).

  For this purpose, in FIG. 7, connecting cylinders 31 and 32 are attached to the ends of the connecting rod 17 in the corner portion of the seismic isolation object 4, and the connecting cylinders 31 and 32 are connected by pipes 33 and 34. The movement synchronizer 18 is constituted, and when one connecting rod 17 is pushed in one direction, this movement is changed by 90 ° by the movement synchronizer 18 and the other connecting rod 17 is pushed in one direction. It is like that.

  The cylinder coupling body 26 connected by the movement synchronization device 18 may be configured in an endless shape along the periphery of the seismic isolation object 4 or may be configured in a single stroke shape in which one place is cut. Also good.

  As shown in FIG. 7, according to the seismic isolation system in which a large number of hydraulic seismic isolation devices M are arranged at the lower part of the seismic isolation object 4 and an anti-locking device 41 is arranged at the lower peripheral edge of the seismic isolation object 4. For example, the seismic isolation object 4 is three-dimensionally seismically isolated by the hydraulic seismic isolation device M, and locking is prevented by the locking prevention device 41.

  When the seismic isolation object 4 is about to lock due to an earthquake, for example, the piston 6 (FIG. 8) of the load support cylinder 3 on the left side of FIG. 7 rises, and the load support on the right side (not shown) parallel to the left side. The piston 6 of the cylinder 3 tries to move so as to descend. At this time, the hydraulic fluid pressure in the cylinder pressurizing chamber 8 of the load supporting cylinder 3 is increased on the side where the piston 6 is going to rise (the left side in FIG. 7), and one fluid chamber of the locking suppression cylinder 15 is caused by the hydraulic fluid pipe 9. A hydraulic fluid is supplied to A, and the force which moves the connecting rod 17 to the arrow direction of FIG. 7 acts. This force acts as a force to move the entire connecting rod 17 at the outer peripheral portion transmitted to each other via the movement synchronization device 18 in the clockwise direction. Conversely, on the side of the load support cylinder 3 where the piston 6 is about to descend (not shown, but on the right side in FIG. 7), the cylinder pressurizing chamber 8 is connected to one of the liquids in the locking suppression cylinder 15 via the hydraulic fluid pipe 9. Since the working fluid in the chamber A is sucked, a force is generated to move the entire connecting rod 17 at the outer peripheral portion counterclockwise. As described above, the anti-locking device 41 is configured such that even if the seismic isolation object 4 tries to lock, the force that antagonizes on the ascending side and the descending side acts on the connecting rod 17. Locking of the object 4 is prevented.

On the other hand, when the seismic isolation object 4 performs vertical vibration without rocking, the entire connecting rod 17 on the outer periphery moves in the same rotational direction, and the gas chamber of the accumulator 10 connected to the liquid chamber B of the rocking suppression cylinder 15. Since the air in 12 is uniformly pressurized / depressurized, soft support by the compression elasticity of air and attenuation by the fluid resistance of the working fluid and air are realized.
JP 2003-206988 A

  As shown in FIG. 7, in the conventional seismic isolation system, a large number of hydraulic seismic isolation devices M having the configuration shown in FIG. 6 are arranged below the seismic isolation object 4, and at the lower peripheral edge of the seismic isolation object 4. The anti-locking device 41 is arranged to perform the three-dimensional seismic isolation of the seismic isolation object 4 and the prevention of the locking, but the hydraulic seismic isolation device M has a complicated configuration and is expensive. In addition, there is a problem that the entire seismic isolation system becomes very expensive because it is necessary to install a large number of such expensive hydraulic seismic isolation devices M in nuclear reactor facilities and the like.

  Further, a large number of locking restraining cylinders 15 provided in the cylinder coupling body 26 of the locking preventing device 41 allow the hydraulic fluid of the hydraulic device 21 to be discharged from the manifold 22 when the seismic isolation object 4 is installed, as shown in FIG. While supplying to the liquid chamber A through the pressure pipe 23, it is necessary to adjust the positions of the locking suppression cylinder 15 and the connecting rod 17 by supplying the liquid chamber B through the hydraulic pipe 24. That is, the piston 16 is in a state where the fluid pressure in the cylinder pressurizing chamber 8 (FIG. 8) in the load support cylinder 3 of the complex 39 connected to the fluid chamber A by the working fluid piping 9 and the fluid pressure in the accumulator 25 are balanced. The positions of the rocking suppression cylinder 15 and the connecting rod 17 are adjusted so that the position of is a predetermined position substantially at the center of the rocking suppression cylinder 15.

  At this time, in order to prevent the locking by preventing the locking by transmitting the hydraulic pressure in the cylinder pressurizing chamber 8 to the accumulator 25 surely when the locking occurs, the hydraulic pressures in the liquid chamber A and the liquid chamber B of each locking suppression cylinder 15 are the same. Although it is necessary to adjust in advance so that the pressure becomes the same, it is a very difficult operation to perform this pressure adjustment on a large number of the locking suppression cylinders 15.

  In addition, the seismic isolation object 4 may tilt due to the weight deviation of the seismic isolation object 4, and in this case, the pressure of the hydraulic seismic isolation device M is adjusted to make the seismic isolation object 4 horizontal. Although it is necessary to release the pressures of the liquid chamber A and the liquid chamber B of each locking suppression cylinder 15 so that the locking suppression cylinder 15 does not become a resistance when adjusting the inclination, Relieving the pressure is a very difficult task.

  The present invention has been made to solve the problems of the conventional apparatus, and can easily adjust the position of a plurality of locking restraining cylinders and connecting rods provided in a cylinder connecting body with a simple and inexpensive configuration and connect them. An object of the present invention is to provide a rocking prevention device for a seismic isolation system that can resist rocking by resisting a sudden moving load on a rod.

According to the first aspect of the present invention, the pistons of a plurality of locking restraining cylinders connected to the cylinder pressurizing chamber and the accumulator of the composite provided at the lower part of the seismic isolation object are connected by a connecting rod to the periphery of the seismic isolation object. An anti-locking device comprising: a cylinder coupling body arranged along; and a movement synchronization device that connects ends of the cylinder coupling body and transmits a movement load of one coupling rod to the other coupling rod;
The anti-locking device of the seismic isolation system comprising a plurality of three-dimensional seismic isolation devices arranged below the seismic isolation object,
A locking prevention device for a seismic isolation system, characterized in that each locking restraining cylinder in the cylinder coupling body is provided with restricting communication means capable of communicating the fluid chambers on both sides of the piston with restricting the flow rate. .

  The invention according to claim 2 relates to the rocking prevention device of the seismic isolation system according to claim 1, wherein the three-dimensional seismic isolation device is an air spring seismic isolation device.

  The invention according to claim 3 is characterized in that the limiting communication means is a small opening provided in the piston so as to communicate the liquid chambers on both sides of the piston. It is related with a prevention device.

  According to a fourth aspect of the present invention, the restricting communication means communicates such that the small opening provided in the piston communicates with the liquid chambers on both sides of the piston so that the liquid in the liquid chambers on both sides of the piston can freely move. The seismic isolation system locking preventing device according to claim 1, comprising a communication pipe and an on-off valve provided in the communication pipe and capable of blocking liquid movement.

  According to a fifth aspect of the present invention, the restriction communicating means communicates so that the liquid in the liquid chambers on both sides of the piston can move freely, and the communication pipe is provided with the communication tube so that the liquid can be shut off and the flow rate can be adjusted. It consists of a regulating valve, The locking prevention apparatus of the seismic isolation system of Claim 1 or 2 characterized by the above-mentioned.

  According to the locking prevention device of the seismic isolation system of the present invention, a plurality of air spring seismic isolation devices are arranged inside the lower peripheral portion of the seismic isolation object, and the composite and accumulator are connected to the periphery of the seismic isolation object. Since the anti-locking device provided with the cylinder connected body and the movement synchronization device for connecting the rod ends of the cylinder connected body is arranged, the 3D seismic isolation of the seismic isolation object and the prevention of the locking are simultaneously performed. At this time, since the air spring seismic isolation device is simpler and less expensive than the conventional hydraulic seismic isolation device, it is necessary to install a large number of air spring seismic isolation devices. In particular, in the anti-locking device for seismic isolation systems that support heavy seismic isolation objects such as nuclear reactor equipment, the overall cost of the anti-locking device for seismic isolation systems can be greatly reduced compared to conventional systems. There is.

  Furthermore, each locking suppression cylinder is provided with restricting communication means consisting of a small opening provided in the piston so as to communicate with the liquid chambers on both sides of the piston. Resisting a sudden moving load on the rocks exerts the effect of suppressing rocking, and static relative movement between the rocking suppression cylinder and the connecting rod that occurs when adjusting the tilt of the seismic isolation object or due to pressure fluctuations due to temperature changes On the other hand, the pressure of the liquid chambers on both sides of the piston is kept the same without exerting the suppression effect by the liquid flowing little by little through the small mouth. Therefore, there is an effect that the adjustment work for keeping the fluid pressure in the fluid chambers on both sides of the piston to be the same can be omitted with a simple configuration.

  Further, the restriction communication means includes a small opening provided in the piston so as to communicate the liquid chambers on both sides of the piston, a communication pipe communicating so that the liquid in the liquid chambers on both sides of the piston can freely move, and the communication pipe In order to prevent the liquid from moving, the on / off valve is configured to block the movement of the liquid. Resisting to a sudden moving load exerts the effect of suppressing rocking, and against static relative movement between the rocking suppression cylinder and the connecting rod that occurs when adjusting the tilt of the seismic isolation object or due to pressure fluctuations due to temperature changes. As a result, the liquid pressure in the liquid chambers on both sides of the piston is kept the same without exerting the suppressing effect by the liquid flowing little by little through the small mouth. Further, if the on-off valve is opened when the locking suppression cylinder and the connecting rod are statically moved relative to each other, the fluid pressures in the fluid chambers on both sides of the piston can be immediately made the same. Therefore, there is an effect that the adjustment work for keeping the fluid pressure in the fluid chambers on both sides of the piston to be the same can be omitted with a simple configuration.

  Further, the limiting communication means is composed of a communication pipe that communicates so that the liquid in the liquid chambers on both sides of the piston can move freely, and an adjustment valve that is provided in the communication pipe and that can shut off the liquid and adjust the flow rate. In order to prevent locking, if the flow rate of the regulating valve is reduced to a low level during normal times, the sudden flow of liquid due to the occurrence of rocking is suppressed by the regulating valve, and it resists the sudden movement load on the connecting rod, thereby suppressing the locking. In addition, when the tilt of the seismic isolation object is adjusted or the static relative movement between the locking cylinder and the connecting rod caused by pressure fluctuations due to temperature changes, the liquid flows through the adjusting valve little by little. The fluid pressures in the fluid chambers on both sides of the piston are kept the same without exhibiting the suppressing effect. Further, if the adjustment valve is opened widely when the locking restraining cylinder and the connecting rod are statically moved relative to each other, the fluid pressures in the fluid chambers on both sides of the piston can be immediately made the same. Therefore, there is an effect that the adjustment work for keeping the fluid pressure in the fluid chambers on both sides of the piston to be the same can be omitted with a simple configuration.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.

  FIGS. 1-5 shows an example of the locking prevention apparatus of the seismic isolation system of this invention, FIG. 1 is a cross section which shows an example of one rocking suppression cylinder of the cylinder coupling body which comprises the locking prevention apparatus of this invention. 2 is a cross-sectional view showing another example of the locking suppression cylinder, FIG. 3 is a cross-sectional view showing still another example of the locking suppression cylinder, and FIG. 4 is a three-dimensional seismic isolation system using a locking prevention device and an air spring isolation device. FIG. 5 is a cut front view showing an example of an air spring seismic isolation device used in the seismic isolation system of the present invention, which is the same as FIGS. 6 to 11. The same reference numerals are attached to the components, and detailed description thereof is omitted, and only features of the present invention will be described in detail.

  As shown in FIG. 4, the anti-locking device of the seismic isolation system of the present invention is a three-dimensional seismic isolation device for supporting the seismic isolation object 4 on the foundation 1 at the lower part inside the periphery of the seismic isolation object 4. Place. 4 shows a case where a number of air spring isolation devices 42 having the configuration shown in FIG. 5 are regularly arranged as a three-dimensional isolation device, the hydraulic isolation device shown in FIG. M or other devices capable of 3D seismic isolation may be arranged.

  As shown in FIG. 5, the air spring seismic isolation device 42 has a horizontal seismic isolation means 43 made of laminated rubber 2 and a vertical seismic isolation means 45 made of air spring chambers 44a and 44b connected in series. The vertical seismic isolation means 45 includes an outer cylinder 47 that moves up and down by fitting to an operating body 46 that includes an air spring chamber 44 a serving as an auxiliary tank. The air spring chamber 44 b is defined inside the outer cylinder 47. A diaphragm 48 is provided, and an air spring chamber 44b defined in the diaphragm 48 communicates with the air spring chamber 44a serving as the auxiliary tank via an orifice 45a. In FIG. 5, reference numeral 55 denotes an air compressor connected to the air spring chamber 44 b of the air spring seismic isolation device 42 through a pneumatic pipe 56.

  Further, an anti-locking device 41 is disposed at the lower periphery of the seismic isolation object 4 as shown in FIG. As in FIG. 7, the locking prevention device 41 includes a cylinder coupling body 26 having a configuration in which the pistons 16 of the double rod type locking suppression cylinders 15 are linearly coupled by the coupling rod 17. It is arranged at the lower part of the periphery (four rounds). Further, the composite bodies 39 having the configuration of FIG. 8 are arranged in two rows so as to sandwich the cylinder coupling body 26, and the composite bodies 39 are arranged in a set of four blocks 19 (19a, 19b, 19c, 19d). The hydraulic fluid piping 9 that is partitioned and connected to the cylinder pressurizing chamber 8 of each load supporting cylinder 3 in each block 19 is divided into a fluid chamber A on one side of the corresponding locking suppression cylinder 15 (15a, 15b, 15c, 15d). And an accumulator 25 is connected to the liquid chamber B on the other side of each of the locking suppression cylinders 15a, 15b, 15c, 15d. Further, in the corner portion of the seismic isolation object 4, the end portions of the cylinder coupling bodies 26 are connected by the movement synchronization device 18, thereby constituting the locking prevention device 41.

  As described above, a plurality of air spring seismic isolation devices 42 arranged inside the lower peripheral portion of the seismic isolation object 4 and an anti-locking device 41 arranged along the lower peripheral edge of the seismic isolation object 4. Due to the seismic system, the seismic isolation object 4 is three-dimensionally isolated and at the same time prevented from locking.

  However, the plurality of locking restraining cylinders 15 of the cylinder coupling body 26 constituting the locking preventing device 41 are the locking restraining cylinders when adjusting the inclination of the seismic isolation object 4 when the seismic isolation object 4 is installed, or when the temperature changes. When the fluid pressures of the fluid chambers A and B sandwiching the 15 pistons 16 are changed, the fluid chambers A and B are communicated to allow the movement of the connecting rod 17 with respect to the rocking suppression cylinder 15 and to be seismically isolated. When the rocking of the object 4 occurs, it is necessary to suppress the rapid liquid flow and to resist the rapid moving load on the connecting rod so as to exhibit a rocking suppression effect.

  For this reason, in the present invention, as shown in FIGS. 1 to 3, the fluid chambers A and B on both sides of the piston 16 are communicated with each of the locking suppression cylinders 15 provided in the cylinder coupling body 26 with the flow rate limited. The restriction communication means 50 is provided.

  1 shows a case where a small opening 51 is formed in the piston 16 so that the liquid chambers A and B on both sides of the piston 16 communicate with each other. The small mouth 51 suppresses a rapid liquid flow due to the occurrence of rocking and exhibits a rocking restraining effect. The rocking restraint cylinder 15 and the connecting rod 17 are generated when adjusting the tilt of the seismic isolation object 4 or by pressure fluctuations due to temperature changes. For the static relative movement, the liquid is flowed little by little to prevent the suppression effect from being exerted.

  The restriction communication means 50 shown in FIG. 2 includes liquid chambers A and B on both sides of the piston 16 outside the rocking suppression cylinder 15 in addition to the configuration in which the small opening 51 is formed in the piston 16 shown in FIG. The communication pipe 52 is connected so that the liquid in the liquid chambers A and B can freely move, and the open / close valve 53 is provided in the communication pipe 52 and can block the movement of the liquid. The communication pipe 52 is provided at a position where it does not interfere with the hydraulic pressure pipes 23 and 24 connected to the locking suppression cylinder 15, the hydraulic fluid pipe 9, and the pipe connected to the accumulator 25.

  3 includes a communication pipe 52 that communicates the liquid chambers A and B on both sides of the piston 16 so that the liquid in the liquid chambers A and B can freely move, and the communication pipe 52. And an adjustment valve 54 capable of blocking the liquid and adjusting the flow rate.

  The operation of the above embodiment will be described below.

  As shown in FIG. 4, a plurality of air spring seismic isolation devices 42 are arranged inside the lower periphery of the seismic isolation object 4, and a plurality of composites 39 and a cylinder are connected to the lower periphery of the seismic isolation object 4. According to the seismic isolation system in which the locking prevention device 41 including the body 26 and the movement synchronization device 18 that connects between the corners of the seismic isolation object 4 in each cylinder coupling body 26 is arranged, the structure is inexpensive. The three-dimensional seismic isolation of the seismic isolation object 4 by the air spring seismic isolation device 42 and the locking prevention of the seismic isolation object 4 by the locking prevention device 41 can be effectively achieved simultaneously.

  At this time, as shown in FIG. 1, the small holes 51 are formed in the piston 16 so as to communicate the liquid chambers A and B on both sides of the piston 16 with each locking suppression cylinder 15 of the cylinder coupling body 26 constituting the locking prevention device 41. Since the restricting communication means 50 is used, an abrupt liquid flow due to the occurrence of rocking is suppressed by the small opening 51 and resists an abrupt moving load on the connecting rod 17, thereby exhibiting a rocking suppressing effect. In addition, the static relative movement of the rocking suppression cylinder 15 and the connecting rod 17 caused by the pressure adjustment due to the temperature change or the tilt adjustment of the seismic isolation object 4 is suppressed by the liquid flowing through the small mouth 51 little by little. The pressure in the liquid chambers A and B on both sides of the piston 16 is kept the same without exhibiting the effect. Therefore, the adjustment work for keeping the fluid pressure in the fluid chambers A and B on both sides of the piston 16 the same can be omitted with a simple configuration.

  In FIG. 2, the restriction communication means 50 is provided with a small port 51 provided in the piston 16 so as to communicate with the liquid chambers A and B on both sides of the piston 16, and the liquid in the liquid chambers A and B on both sides of the piston 16. The communication pipe 52 communicates so that it can freely move, and the on-off valve 53 provided in the communication pipe 52 can block the movement of the liquid, and the on-off valve 53 is closed during normal operation to prevent locking. . According to the configuration of FIG. 2, a rapid liquid flow due to the occurrence of rocking is suppressed by the small mouth 51 and resists a rapid movement load on the connecting rod 17, thereby exhibiting a rocking suppression effect. Further, the static relative movement between the rocking suppression cylinder 15 and the connecting rod 17 caused by the pressure adjustment due to the temperature change or the tilt adjustment of the seismic isolation object 4 is suppressed by the liquid flowing through the small mouth 51 little by little. The fluid pressures in the fluid chambers A and B on both sides of the piston 16 are kept the same without exhibiting the effect. Further, if the on-off valve 53 is opened when the locking restraining cylinder 15 and the connecting rod 17 are relatively moved relative to each other, the fluid pressures in the fluid chambers A and B on both sides of the piston 16 can be immediately made equal. Therefore, the adjustment work for keeping the fluid pressure in the fluid chambers A and B on both sides of the piston 16 the same can be omitted with a simple configuration.

  Further, in FIG. 3, a communication pipe 52 that communicates so that the liquid in the liquid chambers A and B on both sides of the piston 16 can freely move, and an adjustment valve that is provided in the communication pipe 52 and that can shut off the liquid and adjust the flow rate. 54, the restriction communication means 50 is constituted, and the opening degree of the adjustment valve 54 is kept small in the normal time when the seismic isolation object 4 is prevented from being locked. According to the configuration of FIG. 3, an abrupt liquid flow due to the occurrence of rocking is suppressed by the regulating valve 54 and resists a sudden movement load on the connecting rod 17, thereby exhibiting an effect of suppressing rocking. In addition, the liquid flows through the adjusting valve 54 little by little with respect to the static relative movement between the rocking suppression cylinder 15 and the connecting rod 17 that occurs when adjusting the tilt of the seismic isolation object 4 or due to pressure fluctuations due to temperature changes. The fluid pressures in the fluid chambers A and B on both sides of the piston 16 are kept the same without exhibiting the suppressing effect. Further, when the adjusting valve 54 is opened largely when the locking restraining cylinder 15 and the connecting rod 17 are relatively moved relative to each other, the fluid pressures in the fluid chambers A and B on both sides of the piston 16 can be immediately made the same. Therefore, the adjustment work for keeping the fluid pressure in the fluid chambers A and B on both sides of the piston 16 the same can be omitted with a simple configuration.

  It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

It is sectional drawing which shows an example of the locking suppression cylinder provided with the restriction | limiting communication means in the locking prevention apparatus of this invention. It is sectional drawing of the locking suppression cylinder provided with the other restriction | limiting communication means. It is sectional drawing of the rocking | fluctuation suppression cylinder provided with another restriction | limiting communication means. It is a top view of the corner part which shows an example of the seismic isolation system which consists of a three-dimensional seismic isolation device by a locking prevention device and an air spring seismic isolation device. It is a cutting | disconnection front view which shows an example of the air spring seismic isolation apparatus used for the seismic isolation system of this invention. It is a cut side view which shows an example of the conventional hydraulic seismic isolation device. It is a top view which shows an example of the conventional seismic isolation system. It is a cutting | disconnection side view which shows the structure of the conventional composite_body | complex used also for this invention. It is a cutting | disconnection side view which shows a part of locking prevention apparatus. It is a hydraulic-system figure of the conventional locking prevention apparatus. It is the side view which showed the state which rocking arises in the seismic isolation object provided with the conventional hydraulic seismic isolation apparatus.

Explanation of symbols

4 Seismic isolation object 8 Cylinder pressurization chamber 15, 15a, 15b, 15c, 15d Locking suppression cylinder 16 Piston 17 Connection rod 18 Movement synchronization device 25 Accumulator 26 Cylinder connection body 39 Complex 41 Locking prevention device 42 Air spring isolation device (3D seismic isolation device)
50 Restricted communication means 51 Small opening 52 Communication pipe 53 On-off valve 54 Adjustment valve A, B Liquid chamber

Claims (5)

A cylinder coupling body in which pistons of a plurality of locking restraining cylinders connected to a cylinder pressurizing chamber and an accumulator of a composite provided at the lower part of the seismic isolation object are connected by a connecting rod and arranged along the periphery of the seismic isolation object. And an anti-locking device having a movement synchronization device that connects the ends of the cylinder coupling body and transmits a movement load of one coupling rod to the other coupling rod;
The anti-locking device of the seismic isolation system comprising a plurality of three-dimensional seismic isolation devices arranged below the seismic isolation object,
A locking prevention device for a seismic isolation system, characterized in that each locking restraining cylinder in the cylinder coupling body is provided with restricting communication means capable of communicating the liquid chambers on both sides of the piston with restricting the flow rate.   The anti-locking device for a seismic isolation system according to claim 1, wherein the three-dimensional seismic isolation device is an air spring seismic isolation device.   The rocking prevention device for a seismic isolation system according to claim 1 or 2, wherein the limiting communication means is a small opening provided in the piston so as to communicate the liquid chambers on both sides of the piston.   The restriction communication means has a small opening provided in the piston so as to communicate with the liquid chambers on both sides of the piston, a communication pipe communicating so that the liquid in the liquid chambers on both sides of the piston can freely move, and the communication pipe The anti-locking device for a seismic isolation system according to claim 1, further comprising an on-off valve capable of blocking liquid movement. The restriction communication means includes a communication pipe that communicates so that the liquid in the liquid chambers on both sides of the piston can freely move, and an adjustment valve that is provided in the communication pipe and can shut off the liquid and adjust the flow rate. The locking prevention apparatus of the seismic isolation system of Claim 1 or 2 characterized by the above-mentioned.

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