JP4745308B2 - Seismic isolation device with damping mechanism - Google Patents

Description

  The present invention is used, for example, for the purpose of reducing the vibration of the building by absorbing the shaking of the ground due to the earthquake, or for the purpose of reducing the vibration acting on the precision equipment during transportation of the precision equipment. It relates to seismic devices.

  Conventionally, seismic isolation devices that absorb vibrations on the ground or floor and reduce shaking are used as earthquake countermeasures for real estate such as buildings and houses, or as vibration countermeasures when transporting precision equipment and art showcases, etc. It has been. Conventional seismic isolation devices include a type in which a rubber plate is laminated between a base such as the ground and a structure such as a building, or a low friction sliding using a fluororesin between the base and the structure. A type having a surface is known.

  However, in recent years, as a new seismic isolation device, a seismic isolation device using a linear guide device used for a work table of a machine tool or the like has been proposed (JP-A-8-240033). As shown in FIG. 14, the seismic isolation device is formed so that rolling surfaces of rolling elements such as balls are formed along the longitudinal direction and are orthogonal to the base 100 and the structure 101. The first and second track rails 102 and 103, and the first slide member which is assembled to the first track rail 102 via a large number of rolling elements and can freely reciprocate linearly along the first track rail 102. 104 and a second slide member fixed to the first slide member 104 and assembled to the second track rail 103 via a number of rolling elements and capable of linear reciprocation freely along the second track rail 103. Each of the track rails 102 and 103 and the slide members 104 and 105 assembled to the track rails 102 and 103 when the base 100 is shaken by an earthquake or the like. And it performs a relative linear reciprocating motion.

  FIG. 15 is a schematic view of the specific method of using the seismic isolation device as viewed from above. On the base 100, the above-mentioned seismic isolation devices are arranged at four locations, and the first track rails 102 of the base isolation devices are fixed to the base 100 along the X direction. On the other hand, the second track rail 103 is fixed to a structure (not shown) along the Y direction orthogonal to the first track rail 102. Since the dynamic friction coefficient between the track rails 102 and 103 and the slide members 104 and 105 is extremely small, when the base 100 swings in the horizontal direction due to an earthquake or the like, the slide member of each seismic isolation device absorbs the shake. 104 and 105 move on the track rails 102 and 103 along the X direction or the Y direction. That is, the structure provided on the seismic isolation device is insulated from the shaking of the base 100 and the kite is in a state of floating in the air. The reason why the structure shakes violently due to an earthquake or the like is thought to be due to the fact that the period of shaking of the base matches the period of shaking of the structure, causing a resonance phenomenon. However, when the base and the structure are insulated with a seismic isolation device in this way, the vibration of the structure can be avoided by setting the vibration period of the structure long enough to avoid the occurrence of resonance. Can be reduced.

On the other hand, although this seismic isolation device prevents resonance between the base and the structure, it does not completely prevent the shake of the structure and, as described above, insulates the shake of the base and the structure. Therefore, for example, the shaking of the structure will remain after the earthquake has stopped. For this reason, when supporting a structure using such a seismic isolation device, as shown in FIG. 15, a damping device 106 is provided between the base 100 and the structure separately from the seismic isolation device. It was necessary to absorb the energy so that the body shakes quickly. Conventionally, as such a damping device, a base and a structure are connected by a rubber cylinder formed by alternately laminating rubber plates and reinforcing plates, and the vibration energy of the structure is sheared and deformed. What is converted into heat energy accompanying absorption and absorbed is known.
JP-A-8-240033

  However, in this damping device, the amount of shear deformation of the rubber cylinder connecting the base and the structure cannot be set large, resulting in the damping device restricting movement in the XY direction in the seismic isolation device. . For this reason, when the above damping device is used in combination with a seismic isolation device using a linear guide device, it becomes impossible to completely insulate the structure from the base. It can no longer be absorbed in minutes. Further, when the damping device is provided separately from the seismic isolation device, there is a problem that extra work is required and the work of providing the structure on the base in the seismic isolation device becomes complicated.

  The present invention has been made in view of such problems, and an object of the present invention is to insulate the structure from the base and effectively absorb the vibrations of the base. An object of the present invention is to provide a seismic isolation device with a damping mechanism capable of simplifying the mounting operation with respect to the motor.

  That is, the present invention is a seismic isolation device that is arranged between a base and a structure installed on the base, and suppresses transmission of vibrations from the base to the structure. First and second track rails that are formed in a plane and orthogonal to each other, and are assembled to the first track rail via a number of balls, and freely linearly reciprocating along the first track rail A possible first slide member, coupled to either the first track rail or the first slide member and assembled to the second track rail via a number of balls, along the second track rail And a second slide member that can freely linearly reciprocate, and a rotation transmission body that is disposed so that its axis coincides with the moving direction of the first slide member or the second slide member. A motion converting means for converting a linear reciprocating motion of the member into a forward / reverse rotational motion of the rotation transmission body, a rotation sleeve connected to the rotation transmission body, and a housing that accommodates the rotation sleeve and is damped between the rotation sleeves It is composed of a fixed sleeve that forms a force working chamber and a viscous fluid sealed in the working chamber.

  In the seismic isolation device of the present invention configured as described above, for example, the first track rail is fixed to the base, while the structure is fixed to the second track rail orthogonal to the first track rail. The first slide member and the second slide member that move along the second track rail are fixed to each other. At this time, the first slide member or the second slide member is connected to a motion converting means for converting the linear reciprocating motion of the slide member into a forward / reverse rotational motion, for example, a ball screw device. When the first slide member or the second slide member moves on the track rail, the rotation transmission body provided in the motion conversion means rotates and the rotation sleeve connected to the rotation transmission body rotates. The rotating sleeve is accommodated in a fixed sleeve to form a working chamber, and a viscous fluid is sealed in the working chamber. Therefore, when the rotating sleeve rotates, a shear frictional force acts on the viscous fluid in the working chamber, and the kinetic energy of the rotating sleeve is consumed as heat energy of the viscous fluid. That is, the energy of the linear reciprocating motion of the slide member is consumed as thermal energy by the viscous fluid, and the motion of the slide member with respect to the track rail and hence the motion of the structure with respect to the base can be attenuated.

  Here, since the motion converting means connected to the slide member simply converts the reciprocating linear motion into the rotational motion, the motion of the slide member is not limited at all. Can be efficiently absorbed. Further, since the rotating sleeve acting as a damping device is directly fixed to the slide member via the motion converting means, it is necessary to provide a damping device separately from the seismic isolation device when providing the structure to the base. In addition, the installation work of the structure can be simplified correspondingly.

  Hereinafter, the seismic isolation device with a damping mechanism of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 shows a first embodiment of a seismic isolation device with a damping mechanism to which the present invention is applied. The seismic isolation device 1 is provided between a structure such as a building and a base such as a foundation, and supports the support guide 1a on the base against the load of the structure, and the support guide. It is comprised from the attenuation | damping part 1b which converges the shake of the structure supported by the part 1a.

  FIG. 2 is a perspective view showing a configuration of the support guide portion. The support guide portion 1a is configured to be orthogonal to the first track rail 10 fixed to the structure A, the first slide member 11 assembled to the first track rail 10, and the first track rail 10. The second track rail 12 is fixed to the base B such as a base, and the second slide member 13 is assembled to the second track rail 12 and is fixed to the first slide member 11. . Each track rail is formed with a plurality of ball rolling grooves along the longitudinal direction, and each of the slide members 11 and 13 has a large number of balls rolling in the ball rolling grooves. The slide members 11 and 13 can freely move on the track rails 10 and 12 with a very small dynamic frictional resistance by rolling the ball. The 1st slide member 11 and the 2nd slide member 13 are the completely same members, and are mutually fixed back to back via the bracket. Since the first track rail 10 and the second track rail 12 are provided orthogonal to each other, the first slide member 11 moves along the first track rail 10 and the second slide member 13 is the second. When moving along the track rail 12, the structure A moves two-dimensionally on the base B.

  On the other hand, FIG. 3 is a perspective view showing the configuration of the attenuation section 1B. The damping portion 1B is arranged in parallel with the second track rail 12 and is rotatably supported on the base B, and is screwed onto the screw shaft 15 and the second slide member. 13, a nut member 16 fixed to 13, and a damping rod 18 connected to one end of the screw shaft 15 via a shaft coupling 17. A spiral ball rolling groove is formed on the outer peripheral surface of the screw shaft 15 with a predetermined lead, and the nut member 16 is screwed onto the screw shaft 15 via a number of balls circulating infinitely. . Therefore, the nut member 16 can move spirally around the screw shaft 15 with a very small dynamic frictional resistance. One end of the screw shaft 15 is rotatably supported by a bracket 19 erected on the base B, and the other end is also a bracket 20 erected on the base B via a shaft joint 17 and a damping rod 18. It is supported by. On the other hand, the nut member 16 is fixed to the second slide member 13 via the connection bracket 21. When the second slide member 13 moves along the second track rail 12, the axial direction of the screw shaft 15 is accordingly accompanied. Configured to move to. Since the nut member 16 is held non-rotatably by the connecting bracket 21, when the nut member 16 moves together with the second slide member 13 in this way, the screw shaft 15 is given a rotational torque by the nut member 16. A rotation amount corresponding to the movement amount of the second slide member 13 is generated in the screw shaft 15. That is, in the first embodiment, the screw shaft 15 corresponds to the rotation transmission body of the present invention.

  On the other hand, FIG. 4 shows details of the structure of the damping rod 18. The damping rod 18 is fixed to a rotating sleeve 25 connected to the screw shaft 15 via the shaft coupling 17 and a bracket 20 standing on the base B while rotatably holding the rotating sleeve 25. The rotating sleeve 25 is accommodated in the hollow portion of the fixed sleeve 26. A slight gap is provided between the outer peripheral surface of the rotating sleeve 25 and the inner peripheral surface of the fixed sleeve 26, and this gap is filled with a viscous fluid 27. Accordingly, when the rotating sleeve 25 rotates with respect to the fixed sleeve 26, a shear frictional force acts on the viscous fluid 27 existing between them, and the kinetic energy of the rotating sleeve 25 becomes the thermal energy of the viscous fluid 27. It is converted and consumed so that the kinetic energy of the rotating sleeve 25 can be attenuated. That is, the gap between the rotating sleeve 25 filled with the viscous fluid 27 and the fixed sleeve 26 corresponds to the damping force working chamber in the present invention.

  Since the rotary sleeve 25 is coupled to the screw shaft 15 via the shaft coupling 17, the damping rod 18 attenuates the rotational motion of the screw shaft 15, and the rotational motion of the screw shaft 15 is Since the linear motion of the second slide member 13 on the second track rail 12 is converted, the damping rod 18 attenuates the energy of the linear motion of the second slide member 13. That is, in this seismic isolation device 1, when the second slide member 13 performs a linear reciprocating motion on the second track rail 12, the kinetic energy is converted into the rotational motion energy of the screw shaft 15, and then the damping rod 18. It is damped by the viscous fluid 27 inside.

  FIG. 5 shows an example in which the structure A is supported on the base B using the seismic isolation device to which the present invention is applied. In this example, seismic isolation devices 1-1, 1-2, 1-3, 1-4 are arranged at four locations between the structure A and the base B. For example, the seismic isolation devices 1-1, 1- 3, the movement direction of the second slide member is in the X direction, and in the seismic isolation devices 1-2, 1-4, the movement direction of the second slide member is in the Y direction. And each seismic isolation device is arranged in this way, and the above-mentioned support guide part 1a supports the structure A on the base B, so that the structure A is on the base B in both the X direction and the Y direction. It can move freely. That is, the structure A is separated from the base B, and even when the base B is shaken by an earthquake, the vibration acting on the structure A is prevented from resonating with the base B. It is possible to reduce the shaking of the body A. Further, since the damping portion 1b is coupled to the second slide member 13 of the support guide portion 1a, the second slide member 13 moves on the second track rail 12 in the X direction as the structure A swings. Or if it moves to a Y direction, the motion will be attenuate | damped by the attenuation | damping part 1b, and the shake of the structure A can be converged at an early stage.

  Next, FIG. 6 shows a second embodiment of the seismic isolation device to which the present invention is applied.

  Also in the second embodiment, the structure of the support guide for supporting the structure A with respect to the base B is exactly the same as that of the first embodiment. However, the configuration of the attenuation part is slightly different from that of the first embodiment. Accordingly, the same reference numerals as those in the first embodiment are assigned to the support guide portions in FIG. 6 and the detailed description thereof is omitted, and only the attenuation portions are described.

  In the damping part 1b of the first embodiment, when the nut member 16 moves with the second slide member 13, the screw shaft 15 is rotated along with the movement. However, in the damping part 1c of the second embodiment, The nut member 30 itself is configured to rotate with the movement of the two slide members 13. That is, a nut member 30 is rotatably accommodated in a cylindrical casing 31 fixed to the second slide member 13 via a rotary bearing, and the nut member 30 and a rotating sleeve 33 of the damping rod 32 are connected to a joint. 34 are connected. The screw shaft 35 into which the nut member 30 is screwed is fitted into a pair of fixed brackets 36 erected on the base B, and is arranged in parallel with the second track rail 12 and non-rotatably. ing. The configuration of the damping rod 32 is substantially the same as that of the first embodiment described above, except that the screw shaft 35 passes through the rotary sleeve 33 and is fixed to the second slide member 13 by the connecting bracket 37. It differs only in.

  In the damping part 1c of the second embodiment configured as described above, when the second slide member 13 moves on the second track rail 12, the nut member 30 together with the damping rod 32 and the second slide member 13 are in the same direction. Move to. At this time, since the screw shaft 35 into which the nut member 30 is screwed is fixedly provided with respect to the base B, the nut member 30 moving on the screw shaft 35 itself rotates, The amount of rotation corresponding to the amount of movement of the two slide members 13 is given to the nut member 30. Since the rotation sleeve 33 of the damping rod 32 is connected to the nut member 30, the rotation sleeve 33 is rotated with the movement of the second slide member 13. The energy of the linear motion will be damped by the damping rod 32. That is, also in this second embodiment, when the second slide member 13 performs a linear reciprocating motion on the second track rail 12, the kinetic energy is converted into rotational energy, and then the viscosity in the damping rod 32 is increased. It is attenuated by the fluid.

  Since the outer diameter of the nut member is naturally larger than the outer diameter of the screw shaft, the torque for rotating the nut member may be smaller than the torque for rotating the screw shaft, and the first and second embodiments are sufficient. In the case of comparison, the second embodiment can efficiently convert the linear motion energy of the second slide member 13 into the rotational motion energy. Therefore, the seismic isolation device of the second embodiment shown in FIG. 6 can attenuate the vibration energy acting on the structure A more efficiently than the seismic isolation device of the first embodiment.

  Next, FIG. 7 shows a third embodiment of the seismic isolation device to which the present invention is applied.

  The seismic isolation device of the third embodiment also includes a support guide portion 40a that supports the structure A in the X and Y directions with respect to the base B, and an attenuation portion 40b that converges the shaking of the structure. The support guide portion 40 a is configured to be orthogonal to the first track rail 41 fixed to the base B, the first slide member 42 that moves along the first track rail 41, and the first track rail 41. The second track rail 43 is fixed to the first slide member 42, and the second slide member 44 moves along the second track rail 43. As shown in FIGS. 8 to 10, each track rail 41, 43 is provided with a groove 46 and is formed in a channel shape. The ball rolling groove 47 is formed. On the other hand, each of the slide members 42 and 44 is formed in a substantially rectangular shape, and is loosely fitted in the groove 46 of the track rails 41 and 43 through a slight gap. A load rolling groove 48 facing the ball rolling groove 47 of the track rails 41, 43 is formed on both side surfaces of the slide members 42, 44, and a large number of balls 49 are formed on the load rolling groove 48 and the track rail 41. , 43 and the ball rolling grooves 47 so as to roll while applying a load. The slide members 42 and 43 are provided with a no-load ball passage 50 for circulating the ball 49 that has finished rolling on the load rolling groove 48. That is, the slide members 42, 44 are assembled to the track rails 41, 43 via a large number of balls 49, and the slide members 42, 44 become recessed grooves 46 of the track rails 41, 43 as the balls 49 circulate. It is configured to freely reciprocate inside.

  The damping portion 40b includes a screw shaft 51 disposed in the concave groove 46 of the track rails 41 and 43, and a damping rod 52 connected to the screw shaft 51 at one end of the track rails 41 and 43. Has been. A support plate 53 is fixed to one end of the track rails 41 and 43 in the longitudinal direction, and a support block 54 is fixed to the other end. The screw shaft 51 is freely rotatable by the support plate 53 and the support block 54. And the shaft center is supported so as to match the longitudinal direction of the track rails 41 and 43. The support block 54 serves as a bracket for fixing the damping rod 52 to the track rails 41 and 43. Slide members 42 and 44 are screwed onto the screw shaft 51 via a large number of balls, and when the slide members 42 and 44 move in the concave groove 46 along the track rails 41 and 43, the amount of movement is increased. Accordingly, the screw shaft 51 is rotated. That is, the slide members 42 and 44 and the screw shaft 51 constitute a ball screw.

  On the other hand, the damping rod 52 is similar to that of the first embodiment, the rotating sleeve 57 coupled to the screw shaft 51 via the shaft coupling 56, the rotating sleeve 57 being rotatably held and the support block 54. The rotating sleeve 57 is housed in the hollow portion of the fixing sleeve 58. As shown in FIG. 11, a slight gap is provided between the outer peripheral surface of the rotating sleeve 57 and the inner peripheral surface of the fixed sleeve 58, and this gap is filled with a viscous fluid 59. As the shaft coupling 56, even when the axis of the rotating sleeve 57 is slightly decentered with respect to the axis of the screw shaft 51, the rotation of the screw shaft 51 with respect to the rotating sleeve 57 is ensured. It is preferred to use an Oldham coupling so that it can be transmitted.

  And in the damping part 40b of 3rd Example comprised in this way, if each slide member 42,44 moves in the inside of the groove 46 of the track rails 41,43, it will screw with these slide members 42,44. The screw shaft 51 is rotated, and a rotation amount corresponding to the movement amount of the slide members 42 and 44 is given to the screw shaft 51. Since the rotation sleeve 57 of the damping rod 52 is connected to the screw shaft 51, the rotation sleeve 57 is rotated with the movement of the slide members 42 and 44, and the slide members 42 and 44 are rotated. The energy of the linear motion is attenuated by the damping rod 52. That is, also in the third embodiment, when the slide members 42 and 44 perform a linear reciprocating motion on the track rails 41 and 43, the kinetic energy is converted into rotational motion energy, and then the viscosity in the damping rod 52 is increased. It is attenuated by the fluid.

  FIG. 12 shows a fixed state of the first slide member 42 and the second track rail 43. A tap hole 62 into which the fixing bolt 61 is screwed is formed on the upper surface of the first slide member 42, while a through hole 63 for inserting the fixing bolt 61 is formed on the bottom surface of the second track rail 43. The second track rail 43 is fixed to the first slide member 42 by fastening the fixing bolt 61 using the tap hole 62 and the through hole 63. At this time, the second track rail 43 is fixed so that its longitudinal direction is orthogonal to the moving direction of the first slide member 42, that is, the longitudinal direction of the first track rail 41. Thus, when the first track rail 41 is fixed to the base B and the second slide member 44 is fixed to the structure A, the structure A is freely guided on the base B in the X direction and the Y direction. Is possible.

  In the seismic isolation device of the third embodiment, it is not always necessary to fix the second track rail 43 to the first slide member 42, and as shown in FIG. It may be configured that the slide members 44 are fixed back to back and the second track rail 43 is fixed to the structure A. Further, if the first slide member 42 and the second slide member 44 are coupled to each other in this way, the slide members 42 and 44 are integrally formed from the beginning, and the first track rail 41 and the second track are formed. It may be configured to be assembled to the rail 43. Further, the first track rail 41 does not necessarily need to be fixed to the base B. The first track rail 41 and the second track rail 43 are coupled so as to be orthogonal to each other and back to back. The first slide member 42 that moves along the track B may be fixed to the base B, while the second slide member 44 that moves along the second track rail 43 may be fixed to the structure A.

  The seismic isolation device of the third embodiment is also arranged between the structure A and the base B so that the structure A can freely move on the base B in both the X direction and the Y direction. As a result, the structure A is insulated from the base B. Thereby, even when the base B is shaken by an earthquake, the swing acting on the structure A can be prevented from resonating with the shake of the base B, and the swing of the structure A can be reduced. . Further, since the damping rod 52 is coupled to the screw shaft 51 to be screwed with the slide members 42 and 44s, the slide members 42 and 44 move on the track rails 41 and 43 along with the swing of the structure A. When moving in the direction or Y direction, the motion is attenuated by the damping rod 52, and the shaking of the structure A can be converged at an early stage.

  As described above, in the seismic isolation device of the present invention shown in the first to third embodiments, since the attenuation portion for attenuating the linear motion of the slide member is provided integrally with the support guide portion, In the case of using a seismic isolation device, it is not necessary to separately provide an attenuation device, and the labor required for installation can be reduced accordingly.

  Furthermore, in the seismic isolation device of the present invention, the linear motion between the track rail and the slide member accompanying the earthquake is converted into a rotational motion by the screw shaft, and the rotational motion is filled between the rotating sleeve and the fixed sleeve. Since it is attenuated by converting it into thermal energy of a viscous fluid, it is possible to easily cope with a large earthquake by lengthening the screw shaft. In addition, since the attenuation part does not restrain the movement of the slide member in the support guide part, it is possible to avoid the adverse effect of the seismic isolation effect being limited by the attenuation part.

  As described above, according to the seismic isolation device with a damping mechanism of the present invention, the motion converting means connected to the slide member simply converts the reciprocating linear motion into the rotational motion. However, it is possible to effectively absorb the vibration of the base by insulating the structure from the base. Further, since the rotating sleeve acting as a damping device is directly fixed to the slide member via the motion converting means, it is necessary to provide a damping device separately from the seismic isolation device when providing the structure to the base. Accordingly, it is possible to simplify the mounting work for the base and the structure, and to reduce the labor for installing the structure.

It is a top view which shows 1st Example of the seismic isolation apparatus to which this invention is applied. It is a perspective view which shows the support guide part of the seismic isolation apparatus which concerns on 1st Example. It is a side view which shows the attenuation part of the seismic isolation apparatus which concerns on 1st Example. It is sectional drawing which shows the attenuation | damping rod comprised by the attenuation | damping part which concerns on 1st Example. It is a perspective view which shows the example which supported the structure on the base | substrate using the seismic isolation apparatus of this invention. It is a perspective view which shows 2nd Example of the seismic isolation apparatus to which this invention is applied. It is a perspective view which shows 3rd Example of the seismic isolation apparatus to which this invention is applied. It is a perspective view which shows the track rail and slide member of the seismic isolation apparatus which concern on 3rd Example. It is a top view which shows the track rail and slide member of the seismic isolation apparatus which concern on 3rd Example. FIG. 10 is a sectional view taken along line XX in FIG. 9. It is a principal part enlarged view of the attenuation | damping rod which concerns on 3rd Example. It is sectional drawing which shows the fixed state of the 1st slide member and 2nd track rail which concern on 3rd Example. It is sectional drawing which shows the example which fixes the 1st slide member and 2nd slide member which concern on 3rd Example, and comprises a seismic isolation apparatus. It is sectional drawing which shows the conventional seismic isolation apparatus comprised combining the linear guide apparatus. It is a top view which shows the usage example of the conventional seismic isolation apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1a ... Support guide part, 1b ... Damping part, 10 ... 1st track rail, 11 ... 1st slide member, 12 ... 2nd track rail, 13 ... 2nd slide member, 16 ... Nut member, 18 ... Damping rod, 25 ... Rotating sleeve, 26 ... Fixed sleeve, 27 ... Viscous fluid

Claims (2)

A seismic isolation device that is arranged between a base and a structure installed on the base and suppresses transmission of vibrations from the base to the structure,
First and second track rails formed with ball rolling surfaces along the longitudinal direction and arranged orthogonal to each other;
A first slide member which is assembled to the first track rail via a plurality of balls and which can freely reciprocate linearly along the first track rail;
The first track rail is coupled to either the first track rail or the first slide member, and is assembled to the second track rail via a plurality of balls, and can be freely reciprocated linearly along the second track rail. Two slide members;
A rotation transmission body arranged such that its axis always coincides with the moving direction of the first slide member or the second slide member ;
It is fixed to the first slide member or the second slide member and screwed into the rotation transmission body to constitute a motion conversion means, and the linear reciprocation of the slide member is converted into the forward / reverse rotation motion of the rotation transmission body. A member to be
A rotation sleeve coupled to the rotation transmission body;
A fixed sleeve that accommodates the rotary sleeve and rotatably holds the rotary sleeve, and forms a working chamber for damping force between the rotary sleeve;
A seismic isolation device with a damping mechanism, comprising: a viscous fluid enclosed in the working chamber. While the second track rail is fixed to the base, a member that constitutes a motion converting means by screwing to the rotation transmission body is fixed to the second slide member, and the axis of the rotation transmission body is the above-mentioned axis. 2. The seismic isolation device with a damping mechanism according to claim 1 , wherein the fixed sleeve is fixed to a base in accordance with a moving direction of the two slide members.

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