JP6370573B2 - Seismic isolation device - Google Patents

Description

The present invention is a simple and effective seismic isolation device that protects heavy objects such as acoustic equipment such as a piano, precision equipment such as buildings, bridges, molding machines, and semiconductor devices. and / or relates to an impact, such as vertical and horizontal, longitudinal-Yo in grayed, at least, to the seismic isolation device for seismic isolation of vibration of the entire direction of the four-axial (insulator).

  With respect to this type of seismic isolation device, Patent Documents 1 to 3 (collectively referred to as prior documents), which are conventional techniques, can be cited. The prior art document is a seismic isolation device that uses an elastic member that expands and contracts in the left / right / front / rear direction (plane direction) and the up / down direction (vertical direction).

JP 2007-202808 A Japanese Patent Application Laid-Open No. 64-69842 JP 2005-256346 A

  The document 1 is mainly for prevention of falls, and the seismic isolation effect cannot be expected. Thus, although there is no direct relationship, there is a similarity in the use of the term insulator. Further, Document 2 is a structure in which a vibration-proof rubber, a ball, and a spring are arranged in the vertical direction and the surface direction, and can achieve a seismic isolation effect. However, since the entire apparatus vibrates, there is a problem because, for example, it is not possible to reduce the impact on heavy objects. Furthermore, Reference 3 attempts to prevent lifting and seismic isolation, but is considered to be a one-sided seismic isolation effect.

In view of the above, the present invention, for example, in an acoustic device, does not require maintenance and management work after vibration, while maintaining the appearance of a seismic isolation device that can be expected to have a seismic isolation effect, or a normal seismic isolation device. Provide the structure that can expect the seismic isolation effect of the four- axis structure, including the target, up and down, left and right. In addition, for example, the present invention provides a seismic isolation device that can be expected to have a so-called seismic isolation effect that can reduce the impact and avoid the cause of failure even in precision equipment such as a semiconductor device. Furthermore, the present invention provides a seismic isolation device that can achieve a four- axis structure for a heavy object, for example, a building.

In order to achieve the above object, a seismic isolation device according to the present invention provides:
The upper part is composed of a receiver having a shaft-like leg part and supporting the seismic isolation object, an upper unit that movably receives the leg part, and a lower unit provided below the upper unit. In the seismic isolation device that attenuates the vibration applied to the receptor by the unit and the lower unit,
A first spring and a first chamber provided between the upper unit and the receiver; and a first fluid sealed in the first chamber; and the elastic force of the first spring and the A first seismic isolation mechanism that attenuates at least a vertical force applied to the receptor based on compression of the first fluid;
A second spring and a second chamber provided between the upper unit and the lower unit, and a second fluid sealed in the second chamber, and the elastic force of the second spring and the A second seismic isolation mechanism for attenuating a horizontal force applied to the upper unit via at least the receptor based on compression of the second fluid;
A third spring and a third chamber provided between the upper unit and the lower unit, and a third fluid sealed in the third chamber, wherein the elastic force of the third spring and the A third seismic isolation mechanism for attenuating a circumferential force centered on the leg portion applied to the upper unit via at least the receptor based on compression of the third fluid;
A branch projecting from the upper unit; a cylindrical sleeve movably fitted to the branch via the second spring; and a distal end of the sleeve; A first plunger having a first ball that is urged against the inner surface of the lower unit by two springs and slides on the inner surface;
Arranged between the projection protruding from the inner surface of the lower unit and the first plunger, and arranged inside the cylinder and inside the cylinder, and movable to the cylinder via the third spring A second plunger having a core cylinder attached to
With
The upper unit is slidable in the horizontal direction with respect to the lower unit by the first plunger and the second plunger.

Before Symbol receptors, a head having a spherical surface-shaped recess, said vertically provided from the head, and the leg portion to be inserted slidably in a hole formed in the upper unit, in it may be configured substantially bolt-type made.

  The first spring may be mounted on the leg portion of the receiver, and may support the receiver so as to be movable in a vertical direction.

  The lower unit has an inner bottom;
  One or a plurality of the first plungers may be arranged in the radial direction on the inner bottom.

  The upper unit may be formed with a cylindrical support portion that supports the first plunger so as to protrude in the radial direction.

  The second plunger is sandwiched between a second ball disposed between the cylindrical body and the first plunger, and the protrusion projecting from the inner surface of the core cylindrical body and the lower unit. And a third ball that is disposed.

  The second chamber is a sealed space formed by the branch portion and the sleeve,
  The third chamber may be a sealed space formed by the cylindrical body and the core cylindrical body.

The seismic isolation device of the present invention does not require maintenance work such as articulation after vibration in an acoustic device, while maintaining the appearance of a seismic isolation device that can be expected to have a seismic isolation effect or a normal seismic isolation device It is possible to provide a structure that can be expected to have a seismic isolation effect of a four- axis structure, including up and down, left and right. In addition, in precision equipment, it is possible to provide a seismic isolation device that can be expected to have a seismic isolation effect with few failures. Furthermore, it is possible to provide a seismic isolation device that can achieve a four- axis structure for heavy objects, buildings, bridges, and the like.

The perspective view which installed the seismic isolation apparatus of this invention in the piano The perspective view which installed the seismic isolation apparatus of this invention in the building The perspective view which installed the seismic isolation apparatus of this invention in the bridge A perspective view of the seismic isolation device of the present invention installed in the Great Buddha The perspective view which installed the seismic isolation apparatus of this invention in the molding machine The front view which showed the 1st embodiment of the seismic isolation apparatus of this invention The front view which showed the other example provided with drop-off prevention in the 1st embodiment of the seismic isolation apparatus of this invention The front view which showed the state which the upper unit moved to the Y direction in the seismic isolation apparatus of FIGS. Schematic diagram of the main parts of the seismic isolation device of Fig. 2-1. The bird's-eye view which showed the 1st embodiment of the seismic isolation apparatus of this invention Plan view of FIG. Front view of Fig. 3-1 Sectional view of Fig. 3-2 (Structure with O-rings on the legs of the receptor) Sectional drawing which showed the modification 1 (structure which provided the O-ring in the sleeve part of the upper unit) of the 1st embodiment Sectional drawing which showed the modification 2 (The structure which equip | installed the intermediate shaft part of the plunger of a lower unit with the 2nd spring) of the 1st embodiment. Sectional drawing which shows the state which installed the wheel of the piano in the receiving part of the head of a receiver in 1st embodiment. Sectional drawing which shows the state which installed the wheel of the piano in the receiving part of the head of a receiver in 1st embodiment. Cross-sectional view showing a second embodiment with a pair of third springs in the lower unit In the second embodiment of FIG. 6-1, [A] to [D] are the states in which the lower unit has moved upward (+ Z), and [B] is the lower unit in the downward direction (−Z). [C] is a scale cross-sectional view showing the state where the lower unit has moved to the left (-Y), and [d] the state in which the lower unit has moved to the right (+ Y). FIG. 6A is a cross-sectional view showing a first modification of the second embodiment in which the second spring is doubled. 6-1 is a cross-sectional view showing a second modification of the second embodiment in which a second plunger is provided. FIG. 6A is a cross-sectional view showing a third modification of the second embodiment in which the first plunger is provided with a composite (a plurality of springs). 6-4, the cross-sectional view which shows the modification 4 of the 2nd embodiment which showed another example of the spring of a 1st plunger. 6-1 is a cross-sectional view showing a fifth modification of the second embodiment formed by only the second plunger. The perspective view which decomposed | disassembled and showed the 1st embodiment of this invention In the 1st embodiment of the present invention, it is another example of the 1st spring, and is the exploded perspective view which adopted the torsion spring and showed FIG. 3 is a cross-sectional view of the third embodiment of the present invention, which is constituted only by the first plunger. [A] to [D] are the states in which the lower unit is moved upward (+ Y and + Z), and [B] is the lower unit (−) in the first embodiment of FIG. Y and + Z), [C] shows the lower unit moved to the left (+ Z), and [D] shows the lower unit moved to the right (-Z). Scale cross section FIG. 10 is a second cross-sectional view of the third embodiment of the present invention, which is composed of only a plurality of first plungers. The cross-sectional view which is modification 3 of the 3rd embodiment of the present invention, and has arranged the arrangement of the 2nd plunger so that it may serve with the 1st plunger. The cross-sectional view which is the modification 4 of the 3rd embodiment of the present invention, and made the composition which makes a 1st plunger removable. The cross-sectional view which is the modification 5 of the 3rd embodiment of this invention, and was set as the structure which provides a 2nd plunger between 1st plungers. The front view of the partial notch which is the 4th embodiment of this invention and comprised so that a 1st plunger might be act | operated with a 4th spring. Front view of a partial defect showing another example of FIG. The front view of the partial omission which was the 5th embodiment of this invention and comprised so that the 1st plunger and the 2nd plunger might act | operate interlockingly Front view of a partial defect showing another example of FIG. 10-3 The front view of the partial defect which is the 6th embodiment of this invention and comprised the spring for shock absorption in the 1st spring Front view of a partial defect showing another example of FIG. 10-5 The front view of the partial notch which is the 7th embodiment of the present invention and constituted so that the 1st spring might be provided with the torsion spring for shock absorption Front view of a partial defect showing another example of FIG. 10-7 Sectional drawing of the receptor in the first embodiment 11-1 is a cross-sectional view of the state where the lower unit has moved in the + Z direction in the sinked state of FIG. 11-1 is a cross-sectional view of the state where the lower unit has moved in the -Z direction in the sinked state of FIG. 11-1 is a cross-sectional view of a further sunk state (for example, sunk to the lowest position). FIG. 11-1 is a sectional view of the lower unit moved in the + Z direction while sinking to the lowest position. FIG. 11-1 is a cross-sectional view of a state in which the lower unit has moved in the −Z direction while sinking to the lowest position. Sectional drawing which is an 8th embodiment of this invention and showed an example which the receiver provided in the lower unit so that rocking was possible in all the directions of Z direction. A diagram illustrating combinations of the first to eighth embodiments and other preferred embodiments that cannot be illustrated by this combination.

(Structure of seismic isolation device)
Hereinafter, the seismic isolation apparatus 1 which concerns on the embodiment of this invention is demonstrated. The XY plane in the figure is a horizontal plane of the floor, ground, and other surfaces of each building, and the Z-axis direction in the figure is the vertical direction. The direction of rotation about the vertical axis is referred to as “rotation direction”. The direction of rotation from the + Z side to the −Z side when viewed from the + Z side is referred to as “clockwise”. A direction of rotation from the + Z side to the + Y side when viewed from the −Z side is referred to as “counterclockwise”.

As shown in FIGS. 1-1 to 1-5, the seismic isolation device 1 according to each embodiment is common in that it is a columnar device, for example. The seismic isolation device 1 is attached to the lower part of various heavy objects (regardless of weight and size), for example, an acoustic device such as a piano 2 and the like, and the object to be isolated from the outside. Prevents vibrations from being transmitted. As shown in FIG. 3-1, the seismic isolation device 1 is installed on a horizontal plane. The size of the seismic isolation device 1 is preferably a structure in which the length (Y-axis direction) is 24 cm × the width (X-axis direction) is 24 cm × the height (Z-axis direction) is 12.9 cm. In this example, the seismic isolation device 1 has an overall structure such as, for example, the first embodiment shown in FIGS. A unit 80 and a receiver 20 inserted into the upper unit 30 and a part of which is desired by the lower unit 80; and the receiver 20 is accommodated in the upper unit 30 and the lower unit 80. And a lid 10 attached with a stopper. And the 1st spring 41 inserted in the support part (it mentions later. The support part 30c is set in the lower unit 80) of the receiver 20 and the upper unit 30, and the support part (after-mentioned) of this upper unit 30 And the first plunger 50 (50a to 58n) provided between the inner surface of the lower unit 80 and the second plunger 55 (55a to 55n) provided between the first plunger 50 and the inner surface of the lower unit 80. ), And a rolling ball 70 provided on the inner bottom surface of the lower unit 80.

  Hereinafter, the main structure will be described in order.

The upper unit 30 includes a disk-shaped main body 30a, a sleeve 50c suspended from the main body 30a, and a support 30c composed of a plurality of annular or terminal-shaped branches protruding in the radial direction of the sleeve 50c. To do. The sleeve 50 c and the support portion 30 c are set in the lower unit 80. In the figure, reference numeral 30d denotes an opening recess formed in the main body 30a. The collar portion of the main body portion 30 a is mounted on the annular wall surface 80 a of the lower unit 80 with a gap A provided. The support portion 30c is provided with a first plunger 50. The first plunger 50 contacts the inner surface 80a1 of the wall surface 80a of the lower unit 80 via rolling balls 51 (51a to 51n). As shown in FIG. 6A, a second plunger 55 is provided between the first plunger 50 and the inner surface 80a1 of the lower unit 80. Balls 52 ( 52a to 52n) and 53 (53a to 53n) are provided. The ball 51 to 53, Toka upper unit 30 and lower unit 80, all directions of the first plunger 50 and second plunger 55 (4 axially, for example, up and down, left and right, front and rear, yo Ingu etc. = quartet axis mechanism ") The movement, or the impact mitigation for these, failure avoidance, and the seismic isolation effect of the present invention are aimed at.

  As shown in the cross-sectional view of FIG. 4-1, the cross-sectional view of FIG. 6-1, and the like, the first plunger 50 is arranged in four directions (four) in plan view. In this example, a plurality of cylinders 30e provided between the support part 30c branched from the sleeve 50c and the main body part 30a (socket), shaft parts 50b respectively protruding between the cylinders 30e, The sleeves 50c provided around the shafts 50b and fitted to the cylinders 30e so as to be movable, the branch parts 30f projecting radially from the cylinders 30e, and the cylinders It comprises a body 30e and a second spring 50d provided between each branch 30f. Further, the first plunger 50 is provided with a second actuator 5000 (opening holes for air, liquid, and gas intake / exhaust. The same applies to other examples). In order to secure a room for the second actuator 5000, one or several sealing members (O) shown in the figure at appropriate positions such as the support portion 30c, the main body portion 30a, the shaft portion 50b, the sleeve 50c, etc. Ring "not marked" is provided. And the 2nd spring 50d is made into a double structure in FIG. 6-3, and latches the 2nd spring 50d between the sleeve 50c and the support part 30c, or the cylinder 30e. In addition, the number of the first plungers 50 is six in the example of FIG. The cardinal number is free as a general rule (can be adapted to the user's request, weight, size, etc. The same applies hereinafter).

The second plunger 55 is arranged in two directions (two units) in plan view as shown in the cross-sectional view of FIG. Moreover, in FIG. 6-4, it arrange | positions at 4 units | sets. Furthermore, in FIG. Also, the mounting state is straight or inclined, and can be freely set in principle. In this example, a cylindrical body 55a provided in the support portion 30c (socket) of the first plunger 50, and a ball 53 provided in the cylindrical body 55a and provided on a protrusion described later on the inner surface 80a1 so as to be able to roll freely. Are connected to each other, and a third spring 55c provided between the cylindrical body 55a and the core cylindrical body 55b. The second plunger 55 is provided with a third actuator 5500. In order to secure a room for the third actuator 5500, one or several sealing members (O-ring “not labeled”) are provided at appropriate positions such as the cylindrical body 30e and the core cylindrical body 55b. Provide. In principle, the number of O-rings is free. Further, as shown in FIG. 6C, a double structure similar to that of the first plunger 50 may be provided by providing the third spring 55c in the core cylinder 55b.

  The lower unit 80 is a cylindrical casing having an opening 80b formed on the upper surface, and 80a indicates a wall surface. 80c is a bottom surface, and an anti-slip member is provided on the outer bottom surface 80c1. In addition, protrusions 80d and 80e are provided on the inner surface 80a1 of the wall surface 80a (removably provided in the through holes of the inner surface 80a1 shown in FIGS. 7A, 7B, 9A, and 9B). Including a cap) and holds one end of the balls 52 and 53. Further, a protrusion is also formed on the cylindrical body 30e of the first plunger 50, and the other ends of the balls 52 and 53 are held. A protrusion 80 f is formed on the inner bottom surface 80 c 2 to hold the ball 70. In FIG. 2B, there may be a structure in which an enlarged flange called a bottom surface extending portion 80c3 is formed and fixed to the floor surface or the like using a stopper to prevent blind movement of the lower unit 80.

On the wall surface 80a of the lower unit 80, a main body 30a having a bowl shape of the upper unit 30 is mounted, and the first plunger 50 and the second plunger 55 (second spring 50d and third spring 55c, and ( Or the second actuator 5000 and the third actuator 5500), and the upper unit 30 moves in the four- axis directions to achieve seismic isolation.

The second embodiment shown in FIGS. 6-1 to 6-7 is a combination of the first plunger 50 and the second plunger 55 and the second spring 50d and the third spring 55c, and has various structures. The 2nd embodiment is shown. For example, FIG. 6A shows a second embodiment in which the lower plunger 80 is provided with a first plunger 50 in a cross shape and a second plunger 55 in pairs. FIG. 6-3 shows the lower unit 80 in which the first plunger 50 has a cross shape, the second spring 50d is doubled, the second plunger 55 is arranged in pairs, and the third spring 55c is doubled. Figure 2 shows a second embodiment. FIG. 6-4 shows a second embodiment in which the lower plunger 80 is provided with a first plunger 50 in a cross shape and a second plunger 55 in a cross shape. 6-5 shows a second embodiment in which the lower plunger 80 has a first plunger 50 in a cross shape, a second spring 50d is doubled, and a second plunger 55 is in a cross shape. ing. 6-6, the lower plunger 80 has the first plunger 50 in a cross shape and the outer peripheral surface of the sleeve 50c (the outer peripheral surface is formed between the main body 30a of the upper unit 30 and the sleeve 50c. A second embodiment is shown in which a second spring 50d is fitted to the gap C (not shown) and the second plunger 55 is arranged in a cross shape. FIG. 6-7 shows a second embodiment in which the lower unit 80, the first plunger 50 is a support member provided with a ball 51, and the second plunger 55 is arranged in a cross shape. In any case, there are combinations of embodiments and embodiments.

  Further, the third embodiment shown in FIGS. 8-1 to 9-3 is an arrangement structure of a modification of the second embodiment, and in this third embodiment, FIGS. -3 is a simple structure by the combination of the first plunger 50 and the second spring 50d, and FIGS. 9-1 to 9-3 are the first and second plungers 50 and 55 and the second and third springs. A highly accurate structure is shown in combination with 50d and 55c. Other structures conform to the first and second embodiments described above.

  In the fourth embodiment shown in FIGS. 10-1 to 10-8, the first plunger 50 is simplified, and a fourth spring is provided between the first plunger 50 and the cylindrical body 30 e of the upper unit 30. Each embodiment provided with 30 g is shown. Others are in accordance with the first and second embodiments described above. In the examples of FIGS. 10-5 and 10-6, the return spring 41b is provided between the seat surface of the first spring 41 and the recessed portion of the bottom surface of the head 20a. In the examples of FIGS. 10-7 and 10-8, a torsion spring 41c is provided between the seat surface of the first spring 41 and the recessed portion of the bottom surface of the head 20a. The first spring 41 is reduced in diameter, reinforced and speeded up, or reduced in fatigue.

  In the figure, reference numeral 20 denotes a receptor, which is composed of a head portion 20a provided with a concave portion 21 having a curved surface shape and a leg portion 20b suspended from the head portion 20a. The receiver 20 is mounted such that the head 20a can move to the opening recess 30d of the upper unit 30 (moves within the dimension of the space 20 formed on the inner surface side of the head 20a and the opening recess 30d). And it is sealed with an O-ring. Accordingly, the opening recess 30d forms the first actuator 40 in relation to the bottom of the head 20a and the sleeve 30b. A first spring 41 is installed between the bottom of the head 20a and the sleeve 50c. A space H is formed between the leg portion 20b and the inner bottom surface 80c2 of the lower unit 80 to ensure the vertical movement of the receiver 20. As shown in FIG. 7-2, the first spring 41 may be a torsion spring 41a (other springs may also employ torsion springs). In the embodiment employing the torsion spring 41a, stability, seismic isolation effect expansion, fatigue reduction, and the like are achieved.

  In addition, the receptor 20 includes the leg part of the piano 2 in FIG. 1-1, the leg part of the building in FIG. 1-2, the leg part of the bridge in FIG. 1-3, the leg part of the Great Buddha in FIG. Install the legs of the molding machine of -5. Further, in the example of FIGS. 2-2 and 2-3, the shaft portion 100a of the wheel 100 may be fitted to the bracket 20c of the receiver 20 so that the leg portion 20b is not separated from the receiver 20. obtain. As a structure for preventing the receiver 20 from coming off, a ring 20d, a protrusion, and the like are provided at the end of the leg 20b to prevent the sleeve 20c from coming off. The ring 20d is located in the space H.

  In the figure, reference numeral 10 denotes a donut-shaped lid, which is supported by the main body 30a of the upper unit 30 with a stopper and holds the stepped portion of the head 20a of the receiver 20 to prevent it from coming off.

In the example of FIG. 12, a gap C is formed between the inside of the opening recess 30d, the outside of the head portion 20a, and / or the inside cylindrical portion 30b1 of the sleeve 30b, and the outside of the leg portion 20b. . As a result, as shown in the figure, the oscillating angles θ, θ1, etc. in all directions can be secured, and the seismic isolation effect can be enhanced.

  Next, the operation of the seismic isolation device 1 will be described in detail.

1-1 to 1-5, the leg portion 20b of the piano 2 is installed in the concave portion 21 of the receiver 20. Therefore, the vibration in the vertical direction, or with respect to impact, Figure 11-1, as shown in Figure 11-4, stretching with the first spring 41, and more compression of the first actuator 40 (first aseismatic means The receptor 20 moves up and down in the opening recess 30d and the sleeve 50c, and absorbs and attenuates. Mitigates vertical vibration or impact on the piano 2. On the other hand, with respect to vibration or impact in the horizontal direction (floor surface direction), as shown in each drawing, the first plunger 50 and / or the second plunger 55 can be expanded and contracted (second spring 50d and / or third). through the expansion and contraction of the spring 55c, the compression) of the second actuator 5000 and / or the third actuator 5500 (the action of the second seismic isolation mechanism), the upper unit 30 is moved in the lateral direction, the absorption and attenuated. Mitigates horizontal vibration or impact on the piano 2. The first plunger 50 and the second plunger 55, and the second spring 50d and the third spring 55c, for example, FIGS. 6-4 and 6-5, FIGS. 9-1 and 9-2, etc. In this example, the functions of the first seismic isolation mechanism and the second seismic isolation mechanism are combined, but each is an independent example, that is, the function of the first seismic isolation mechanism and the second seismic isolation mechanism. Another example is the work of the seismic mechanism. In any case, seismic isolation effects can be expected. The movement of the upper unit 30 in the horizontal direction is assured by the action of the ball 70 and the balls 51 and 52, and the vibration or impact in the horizontal direction is reduced. In any case, earthquakes are complex and can be achieved by mitigating each of the aforementioned operations and vibrations or shocks.

  6-2 [A] to [D], the seismic isolation and the operation of the present invention will be described.

  [A] absorbs vibration and / or shock by moving the lower unit 30 to the left (−Y) and compressing (contracting) the first plunger 50 on the + Y side. Tremble). On the contrary, the first plunger 50 on the −Y side is extended (extended). Further, by compressing the second plunger 55 on the + Z side, vibration and / or impact is absorbed. Conversely, the second plunger 55 on the −Z side is extended.

  Next, in [B], the lower unit 30 moves to the right (+ Y), and the first plunger 50 moves in the reverse direction from the state [B]. The second plunger 55 moves in the same manner as the second plunger 55 of [A].

  Subsequently, in [C], the lower unit 30 moves downward (−Z) and compresses the first plunger 50 on the + Z side to absorb vibrations and / or shocks (isolates). ). Conversely, the -Z side first plunger 50 is extended. Further, by compressing the second plunger 55 on the + Z side, vibration and / or impact is absorbed. Conversely, the second plunger 55 on the −Z side is extended.

  Then, in [D], the lower unit 30 moves upward (+ Z), and the first plunger 50 moves in the opposite direction from the state [C]. The second plunger 55 moves in the same manner as the second plunger 55 in [C].

Even if the lower unit 80 moves due to the above movements [A] to [D] at least due to an earthquake, the upper unit 30 is substantially stationary and can be seismically isolated in the horizontal direction.

  And the isolation | separation of the vertical direction in each figure mentioned above, the horizontal direction, and the rocking | fluctuation direction by FIG. 12 mentioned above can be aimed at. That is, it is considered that a comprehensive seismic isolation can be achieved by providing a seismic isolation in the swing direction in addition to the vertical / horizontal isolation.

  The movement in FIG. 8-2 is also similar to the example in FIG.

  11-1 to 11-6 will be described. FIG. 11-1 is a cross-sectional view of the first embodiment in which the receptor 20 is sunk, and FIG. 11-1 is a cross-sectional view of the state where the lower unit 80 has moved in the + Z direction with the sunken state, and FIG. 11-3 shows the state in which the lower unit 80 has moved in the −Z direction with the sunken state of FIG. 11-4 is a cross-sectional view of the state, FIG. 11-4 is a cross-sectional view of the state in which the receptor 20 of FIG. 11-1 is further sunk (for example, sunk in the lowest position), and FIG. 11-6 is a cross-sectional view of the state in which the lower unit 80 has moved in the + Z direction while sinking to the lowest position of FIG. 1, FIG. 11-6 is a state of sinking to the lowest position of FIG. Each of the sectional views in a state of moving in the direction is shown, and is a basic movement of the seismic isolation mode.

  FIG. 13 is based on FIG. 6A. FIG. 6A shows the damper effect by the O-ring, the second spring 50d / second actuator 5000 of the first plunger 50, the third spring 55c / third actuator 5500 of the second plunger 55, and the like. Is a chart relating to the combination (existence of assembly), superiority of function (effectiveness of seismic isolation), the double structure of the second spring 50d and the third spring 55c, and the like.

  As mentioned above, although this embodiment was described, this invention is not limited by the said embodiment, A various embodiment and deformation | transformation are enabled, without deviating from the broad spirit and scope of this invention. Is. The embodiment described above is for explaining the present invention, and does not limit the scope of the present invention.

1 Seismic Isolation Device 2 Piano 10 Lid 11 Screw 20 Receptor 20a Head 20b Leg 20c Bracket 20d Ring 21 Recess 30 Upper Unit 30a Main Body 30b Sleeve 30b1 Tube 30c Support 30d Open Recess 30e Tube 30f Branch 30g Fourth spring 40 First actuator (first fluid)
41 1st spring 41a torsion spring 41b spring 41c torsion spring 50 1st plunger 50a cylinder 50b shaft 50c sleeve 50d 2nd spring 5000 2nd actuator (2nd fluid)
51 ball 52 ball 53 ball 55 second plunger 55a cylinder 55b core cylinder 55c third spring 5500 third actuator (third fluid)
70 Ball 80 Lower unit 80a Wall surface 80a1 Inner surface 80b Opening 80c Bottom surface 80c1 Outer bottom surface 80c2 Inner bottom surface 80c3 Extension portion 80d Protrusion portion 80e Protrusion portion 80f Protrusion portion
1 00 wheel 100a shank A gap B space C clearance H space

Claims (7)

The upper part is composed of a receiver having a shaft-like leg part and supporting the seismic isolation object, an upper unit that movably receives the leg part, and a lower unit provided below the upper unit. In the seismic isolation device that attenuates the vibration applied to the receptor by the unit and the lower unit,
A first spring and a first chamber provided between the upper unit and the receiver; and a first fluid sealed in the first chamber; and the elastic force of the first spring and the A first seismic isolation mechanism that attenuates at least a vertical force applied to the receptor based on compression of the first fluid;
A second spring and a second chamber provided between the upper unit and the lower unit, and a second fluid sealed in the second chamber, and the elastic force of the second spring and the A second seismic isolation mechanism for attenuating a horizontal force applied to the upper unit via at least the receptor based on compression of the second fluid;
A third spring and a third chamber provided between the upper unit and the lower unit, and a third fluid sealed in the third chamber, wherein the elastic force of the third spring and the A third seismic isolation mechanism for attenuating a circumferential force centered on the leg portion applied to the upper unit via at least the receptor based on compression of the third fluid;
A branch projecting from the upper unit; a cylindrical sleeve movably fitted to the branch via the second spring; and a distal end of the sleeve; A first plunger having a first ball that is urged against the inner surface of the lower unit by two springs and slides on the inner surface;
Arranged between the projection protruding from the inner surface of the lower unit and the first plunger, and arranged inside the cylinder and inside the cylinder, and movable to the cylinder via the third spring A second plunger having a core cylinder attached to
With
The upper unit is a seismic isolation device arranged to be slidable in the horizontal direction with respect to the lower unit by the first plunger and the second plunger.   The receptor is composed of a head having a spherical recess, and a leg that is suspended from the head and is slidably inserted into a hole formed in the upper unit. The seismic isolation device according to claim 1, which is configured in a bolt shape.   The seismic isolation device according to claim 1 or 2, wherein the first spring is mounted on the leg portion of the receptor and supports the receptor so as to be movable in a vertical direction. The lower unit has an inner bottom;
The seismic isolation device according to any one of claims 1 to 3, wherein one or a plurality of the first plungers are arranged in a radial direction on the inner bottom.   The seismic isolation device according to any one of claims 1 to 4, wherein a cylindrical support portion that supports the first plunger is formed in the upper unit so as to protrude in a radial direction.   The second plunger is sandwiched between a second ball disposed between the cylindrical body and the first plunger, and the protrusion projecting from the inner surface of the core cylindrical body and the lower unit. The seismic isolation device according to claim 1, further comprising a third ball arranged. The second chamber is a sealed space formed by the branch portion and the sleeve,
The seismic isolation device according to any one of claims 1 to 6, wherein the third chamber is a sealed space formed by the cylindrical body and the core cylindrical body.