JP2019127994A - Aseismic base isolation support device - Google Patents

Abstract

To provide an aseismic base isolation support device capable of attaining a stable aseismic characteristic and additionally showing in particular a superior durability, seismic effect and manufacturability.SOLUTION: An aseismic base isolation support device 1 comprises a disc-like upper plate 2 fixed to a structure of upper part such a building and the like, a disc-like lower plate 3 fixed to a lower part structure such a foundation and the like, several toric rigid layers 4 and elastic layers 5 alternately laminated between the upper plate 2 and the lower plate 3 and concentrically arranged to each other, a centrum 10 defined by a lower surface 6 of the upper plate 2 and an upper surface 7 of the lower plate 3 and each of the inner peripheral surfaces 8 and 9 of the rigid layers 4 and the elastic layers 5, and a laminate body 14 vulcanized and adhered to a cylindrical outer peripheral surface 11 of the rigid layers 4 at the inner peripheral surface and having a cylindrical covering layer 13 integrated with a cylindrical outer peripheral surface 12 of the elastic layers 5, and a lead plug 15 arranged at the centrum 10.SELECTED DRAWING: Figure 1

Description

  The present invention is a device disposed between two structures for absorbing the energy of relative horizontal vibration between the two structures and for reducing the vibration acceleration input to the structures, in particular for damping seismic energy The present invention relates to a seismic isolation support device that reduces earthquake input acceleration and prevents damage to structures such as buildings and bridges.

  A laminate having a rigid layer and an elastic layer alternately stacked, and a hollow portion defined by the inner circumferential surfaces of the rigid layer and the elastic layer, and a lead plug disposed in the hollow portion of the laminate The seismic isolation support device supports the vertical load of the structure with the laminated body and the lead plug, and the horizontal vibration of the structure with respect to one end in the laminating direction of the laminated body caused by the earthquake. While reducing by plastic deformation (shear deformation), it is also possible to suppress the transmission of horizontal vibration of one end in the stacking direction of the stack due to earthquake to the structure by elastic deformation (shear elastic deformation) of the stack Seismic isolation support devices that are known are known.

  And the laminated body including the rigid layer and the elastic layer laminated | stacked alternately, the upper structure to which an upper structure is fixed to the upper surface, while the upper surface of the laminated body is fixed to the lower surface, and the lower structure to the lower surface In the seismic isolation supporting device having the lower plate on which the lower surface of the laminate is fixed on the upper surface, the upper plate and the lower plate in relative horizontal displacement of the lower structure with respect to the upper structure. Stress concentration is likely to occur in the portion of the laminate (fillet portion) close to each other, which may cause buckling, and such stress concentration should be eliminated, in the rigid layer adjacent to each of the upper and lower plates. A seismic isolation support device having an outer diameter larger than that of other rigid layers has been proposed.

Japanese Patent Application Laid-Open No. 11-141180 JP, 2009-8181, A JP, 2014-47926, A

  By the way, in a seismic isolation support device that can eliminate stress concentration that can cause buckling, in order to obtain a vibration damping effect, when lead is press-fitted and filled into the hollow portion of the laminate, the laminate is press-fitted and filled. The lead plug surrounded by the inner circumferential surface of the rigid layer and the elastic layer is partially pushed back by the elasticity of the elastic layer, but the push back generates an internal pressure in the lead plug.

  If the generated internal pressure of the lead plug is not sufficient in relation to the rigidity of the elastic layer, a clearance between the outer peripheral surface of the lead plug and the inner peripheral surface of the rigid layer and the elastic layer in the seismic isolation operation of the seismic isolation supporting device. May occur, and vibration may not be effectively damped by the lead plug.

  Such a problem occurs notably in a lead plug, but is not limited to such a lead plug, and is a vibration damping body made of a damping material such as lead, tin or a lead-free low melting point alloy which absorbs vibration energy by plastic deformation. But it can happen.

  The present invention has been made in view of the above-mentioned points, and the object of the present invention is to eliminate stress concentration in at least a portion of the laminate adjacent to at least the upper plate or the lower plate in the laminate. In addition, as a result of being able to restrain the vibration damping body disposed in the hollow portion of the laminate without a gap, it is possible to obtain stable seismic isolation characteristics by the synergetic effect of the elimination of stress concentration and the restraint of the vibration damping body. In addition, it is an object of the present invention to provide a seismic isolation supporting device which can avoid fatigue of the elastic layer and the vibration damping body of the laminate, and is particularly excellent in durability, seismic isolation effect and manufacturability.

  The seismic isolation supporting device of the present invention comprises upper and lower plates, a rigid layer and an elastic layer alternately stacked between the upper and lower plates, an upper surface of the lower and lower plates of the upper plate, and a rigid layer and an elastic layer. A rigid layer and an elastic member added to the upper plate, comprising a laminate having hollow portions defined by respective inner circumferential surfaces, and a vibration damping body disposed in the hollow portion of the laminate. The load in the stacking direction of the layers is supported by the lower plate via the stack and the vibration damping body, and the rigid layer includes at least one upper rigid layer, at least one lower rigid layer, and in the stacking direction. At least one upper rigid layer and a plurality of middle rigid layers arranged in the stacking direction between the at least one lower rigid layer, the at least one upper rigid layer and the at least one lower rigid layer At least one of the The outer peripheral surface of the intermediate rigid layer is positioned outside the outer peripheral surface in a direction perpendicular to the stacking direction, and the surface pressure from the vibration damping body to the upper plate based on the load in the stacking direction to be supported The vibration damping body is hollow so that the ratio Pr / P0 of Pr and the surface pressure P0 based on the load on the pressure receiving surface to the load of the laminate is 1.00 or more (ratio Pr / P0 1.00 1.00) It is arranged in the department.

  In the present invention, when the elastic layer is compressed in the stacking direction (vertical direction) by the load (vertical load) applied to the upper plate from the supporting structure, and the height of the hollow portion (length in the stacking direction) is reduced, The vibration damping body presses the inner peripheral surface of the elastic layer and partially projects on the elastic layer in the direction (horizontal direction, ie, shear direction) perpendicular to the laminating direction, and this overhang, in other words, the elastic layer by the vibration damping body Internal pressure generated in the vibration damping body based on the elastic reaction force of the elastic layer caused by the pressure on the inner circumferential surface of the elastic layer, and the surface pressure Pr from the vibration damping body to the upper plate and the pressure receiving surface for the load of the laminate In the seismic isolation support device in which the vibration damping body is disposed in the hollow portion so that the ratio Pr / P0 to the surface pressure P0 based on the load is in a constant relationship, the vibration damping body disposed in the hollow portion It is based on the finding that it can be bound without

  In the seismic isolation support device of the present invention based on such knowledge, the ratio Pr / P0 is 1.00 or more (ratio Pr / P0 ≧ 1.00), and preferably exceeds 1.00 (ratio Pr / P0> 1. 00), more preferably 1.09 or more (ratio Pr / P0 ≧ 1.09), even more preferably 2.02 or more (ratio Pr / P0 ≧ 2.02), most preferably 2. When the vibration damping body is preferably densely arranged in the hollow portion so that the ratio is 50 or more (ratio Pr / P0 ≧ 2.50), even in the shear elastic deformation of the laminated body in the direction orthogonal to the laminating direction, As a result of restraining the vibration damping body arranged in the hollow portion with the rigid layer and the elastic layer and the upper and lower plates without a gap, stable seismic isolation characteristics can be obtained, and in addition, the elastic layer and the vibration damping body It can avoid fatigue and is particularly excellent in durability, seismic isolation effect and manufacturability. It is possible to provide a seismic isolation support device.

  In the present invention, the surface pressure Pr from the vibration damping body to the upper plate depends on the magnitude of the load from the structure, the degree of filling of the vibration damping body into the hollow portion, and the degree of elasticity or rigidity of the elastic layer. In the case of the seismic isolation supporting device having a ratio Pr / P0 of 1.00 or more, the vibration damping body appropriately bites into the elastic layer, and the inner circumferential surface of the elastic layer becomes concave.

  By the way, in the seismic isolation support device in which the ratio Pr / P0 is smaller than 1.00, the lower surface of the upper plate that defines the hollow portion, the upper surface of the lower plate, and the inner peripheral surfaces of the rigid layer and the elastic layer are in contact with them. Clearances are likely to occur between the outer peripheral surface, the upper surface, and the lower surface of the vibration damping body. Therefore, during the operation of the seismic isolation support device, the rigid layer and the elastic layer and the upper and lower plates can be easily separated from the vibration damping body. There is a gap between the two and it shows unstable seismic isolation characteristics. This is presumed to be due to the fact that the vibration damping body is not restrained to the upper and lower plates and the laminate at least in the shear direction (horizontal direction) without a gap, and causes the vibration damping body to undergo deformation other than shear deformation.

  On the other hand, in the seismic isolation support device in which the ratio Pr / P0 is larger than a certain level, specifically, in the seismic isolation support device in which the ratio Pr / P0 is larger than 5.90, the vibration damping body bites into the elastic layer so that the elastic layer The inner circumferential surface of the layer becomes excessively concave, the shear stress between the elastic layer and the rigid layer in the vicinity of this part becomes too large, the deterioration of the elastic layer is accelerated, and the durability of the elastic layer is deteriorated. Also, in order to obtain such a seismic isolation support device with a ratio Pr / P0 of greater than 5.90, the press fit of the vibration damping body into the hollow portion must be extremely large, and the manufacture of the seismic isolation support device I also found it difficult.

  The vibration damping body disposed in the hollow portion can be constrained by the rigid layer and the elastic layer and the upper plate and the lower plate without a gap, and stable seismic isolation characteristics can be obtained. The ratio Pr / P0 capable of avoiding body fatigue and obtaining a seismic isolation supporting device particularly excellent in durability and seismic isolation effect and manufacturability is seismic isolation and supporting by the seismic isolation supporting device of the present invention Although there is a preferred range for each load on buildings and bridges, seismic isolation support devices with ratio Pr / P0 ≧ 1.00 and ratio Pr / P0 ≦ 5.90 are high for small vibration inputs It exhibits rigidity and has a function of exhibiting low rigidity, that is, a so-called trigger function, and can respond particularly favorably to large-amplitude earthquake motions, and is extremely excellent in manufacturability.

  In addition, in the present invention, at least one of the at least one upper rigid layer and the at least one lower rigid layer is positioned outside in the direction orthogonal to the stacking direction from the outer peripheral surface of each of the plurality of intermediate rigid layers. Since the vibration damping body is disposed in the hollow portion so that the ratio Pr / P0 is equal to or greater than 1.00 (ratio Pr / P0 ≧ 1.00). Stress concentration in at least a portion (fillet portion) close to the upper plate or the lower plate in the laminate can be eliminated.

  In a preferred example according to the present invention, among the plurality of intermediate rigid layers, the adjacent intermediate rigid layer adjacent to at least one of the at least one upper rigid layer and the at least one lower rigid layer in the stacking direction is a plurality of intermediate rigid layers. Among the partial rigid layers, the central intermediate rigid layer is located at the same position in the direction orthogonal to the outer peripheral surface of the central intermediate rigid layer positioned in the middle of the adjacent intermediate rigid layer in the stacking direction or perpendicular to the stacking direction. And an outer peripheral surface positioned outside in a direction orthogonal to the stacking direction with respect to the outer peripheral surface.

  In the present invention, the rigid layer is arranged side by side in the stacking direction with respect to the at least one upper rigid layer, and is located at the same position in the direction orthogonal to the outer peripheral surface of the at least one upper rigid layer. It may further comprise at least one other upper rigid layer having an outer circumferential surface.

  Also in the present invention, the rigid layer may comprise a plurality of upper rigid layers arranged in a stacking direction relative to one another including at least one upper rigid layer, in which case the plurality of upper rigidities Among the layers, the uppermost rigid layer disposed closest to the upper plate in the stacking direction has an outer periphery positioned outside in the direction perpendicular to the stacking direction from the outer peripheral surface of the upper rigid layer excluding the uppermost rigid layer. According to such a seismic isolation support device, even when the laminated body is deformed in the horizontal direction, plastic deformation is unlikely to occur in the plurality of upper rigid layers, thereby stabilizing the rigidity in the horizontal direction. It is possible to further eliminate the possibility of causing buckling or the like based on the stress concentration of the fillet portion.

  In another preferred example of the present invention, the rigid layer is arranged side by side in the stacking direction with respect to at least one lower rigid layer, and in a direction orthogonal to the outer peripheral surface of the at least one lower rigid layer. It further includes at least one other lower rigid layer having an outer peripheral surface located at the same position.

  Furthermore, in the present invention, the rigid layer may comprise a plurality of lower rigid layers arranged in a stacking direction relative to one another including at least one lower rigid layer, in this case a plurality of lower layers. Among the rigid layers, the lowermost rigid layer disposed closest to the lower plate in the laminating direction is positioned outside in the direction orthogonal to the laminating direction than the outer peripheral surface of the lower rigid layer excluding the lowermost rigid layer According to such a seismic isolation support device, even when the laminated body is deformed in the horizontal direction, plastic deformation is unlikely to occur in the plurality of lower rigid layers, thereby stabilizing the horizontal rigidity. It is possible to eliminate the possibility of causing buckling or the like based on the stress concentration of the fillet portion.

  In the rigid layer according to the present invention, in the preferred example, the outer peripheral surfaces disposed on the outer side have equal thicknesses in the lamination direction of the elastic layers in a state in which the load in the lamination direction is applied to the upper plate. The thickness is located three times or more outside the thickness, but the present invention is not limited thereto, and it may be positioned at least 0.5 times outside the thickness.

  In the seismic isolation support device of the present invention, the laminate is bonded to the outer peripheral surface of the rigid layer having an outer peripheral surface of a cylindrical shape, a rectangular shape, a pentagonal shape, a hexagonal shape, or the like, preferably a vulcanized adhesive. Corresponding to the outer peripheral surface of the rigid layer, and a cylindrical shape integrally formed with the outer peripheral surface of the elastic layer having an outer peripheral surface of a cylindrical shape such as a cylindrical shape, a square shape, a pentagon shape, a hexagonal shape, etc. The covering layer may further be provided, in which case the covering portion covering at least one of the upper rigid layer and the lower rigid layer of the covering layers is the middle rigid layer of the covering layers. It may have an outer peripheral surface located outside in the direction orthogonal to the laminating direction than the outer peripheral surface of the covering portion, and the outer peripheral surface of such a covering portion is cylindrical in a preferred example, If the outer peripheral surface of the rigid layer is cylindrical, it is also cylindrical, and the upper rigid layer The covering portion covering at least one of the lower rigid layer and the covering portion covering the intermediate rigid layer are integrally connected by a covering portion having an annular outer peripheral surface having a circular arc concave surface. It is good to be.

  In the present invention, the vibration damping body is, in a preferred example, made of a damping material that absorbs vibrational energy by plastic deformation, and such damping material is lead, tin or a lead-free low melting point alloy (eg tin-zinc based alloy) A tin-bismuth alloy and a tin-indium alloy, specifically, a tin-bismuth alloy containing 42 to 43 wt% of tin and 57 to 58 wt% of bismuth). It may be

  In the present invention, in a preferred example, the vibration damping body is disposed in the hollow portion with no space with respect to the rigid layer and the elastic layer and the upper and lower plates, and the seismic isolation supporting device of the present invention is On the other hand, vibration in the direction perpendicular to the stacking direction of the upper plate is damped by plastic deformation of the vibration damping body, while transmission of vibration in the direction orthogonal to the stacking direction of the lower plate is transmitted to the upper plate in shear elastic deformation of the laminate. It has come to be suppressed.

  In the present invention, regarding the upper plate and the uppermost rigid layer in the stacking direction, in a preferred example, the upper plate includes an upper flange plate having a through hole, and an upper closing plate fixed to the upper flange plate in the through hole. The upper surface of the vibration damping body in the stacking direction is in contact with the lower surface of the upper closing plate in the stacking direction without a gap, and the outer peripheral surface of the upper end portion of the vibration damping body in the stacking direction has a through hole. It is in contact with the inner peripheral surface of the upper flange plate to be defined without a gap. In another preferred example, the upper plate is fitted with the upper flange plate having a key groove on the lower surface and the upper flange plate in the key groove. And a key projecting partially from the lower surface of the upper flange plate, wherein the upper rigid layer is thicker than the plurality of middle rigid layers and on the upper surface is a portion from the lower surface of the upper flange plate Other key with the projecting key fitted It may be composed of an upper thick steel plate having a thickness in the stacking direction of about 10 mm to 50 mm, and in this case, an elastic layer is interposed between the upper flange plate and the upper thick steel plate in the stacking direction. Alternatively, the upper thick steel plate may be in direct contact with the lower surface of the upper flange plate at its upper surface.

  In the present invention, regarding the lower plate and the lowermost rigid layer in the stacking direction, in a preferred example, the lower plate is a lower flange plate having a through hole, and a lower closing plate fixed to the lower flange plate in the through hole. The lower surface of the vibration damping body in the stacking direction is in contact with the upper surface of the lower closing plate without any gap, and the outer peripheral surface of the lower end portion of the vibration damping body in the stacking direction is a through hole. The lower flange plate is in contact with the inner peripheral surface of the specified lower flange plate without a gap. In another preferred example, the lower plate has a lower flange plate having a key groove on the upper surface, and is fitted to the lower flange plate in the key groove. The lower rigid layer is thicker than the plurality of middle rigid layers and the lower surface of the lower flange plate is partially extended from the upper surface of the lower flange plate. Other keyway in which the projecting key is fitted It may consist of a lower thick steel plate having a thickness in the stacking direction of about 10 mm to 50 mm. In this case, an elastic layer is interposed between the lower flange plate and the lower thick steel plate in the stacking direction. Alternatively, the lower thick steel plate may be in direct contact with the upper surface of the lower flange plate at its lower surface.

  In the present invention, the upper flange plate and the lower flange plate may have a circular or oval outer edge, or alternatively, the outer edge may be a rectangular or a polygon including a rectangular or a pentagon, the upper flange plate and In a preferred example, the upper closing plate, the lower flange plate, and the lower closing plate are made of steel plates.

  In the present invention, examples of the material of the elastic layer include natural rubber, silicone rubber, high damping rubber, urethane rubber, chloroprene rubber, and the like, preferably natural rubber, and each layer of the elastic layer is preferably Although it has a thickness in the stacking direction of about 1 mm to 30 mm in an unloaded state (a state in which a load in the supporting stacking direction is not applied to the upper plate), it is not limited to this, and the upper plate is a through hole. In a preferred example comprising an upper flange plate having an upper flange plate and an upper closing plate fixed to the upper flange plate in the through hole, the uppermost elastic layer in the stacking direction is the upper flange plate at the upper surface in the stacking direction And a lower flange plate having a through hole, and a lower closing plate fixed to the lower flange plate in the through hole. In a preferred embodiment, the lowermost elastic layer is bonded, preferably vulcanized, to the upper surface in the laminating direction of the lower flange plate at the lower surface in the laminating direction, while the material of the rigid layer is A fiber reinforced synthetic resin plate such as a steel plate, carbon fiber, glass fiber or aramid fiber, or a fiber reinforced hard rubber plate, etc., and each layer of the rigid layer has a thickness in the stacking direction of about 1 mm to 6 mm. In addition, the uppermost layer and the lowermost rigid layer may have a thickness in the stacking direction of about 10 mm to 50 mm, but are not limited thereto, and in addition, the rigid layer and the elastic layer There is no particular limitation on the number of sheets, from the viewpoint of the load of the structure to be supported, the amount of shear deformation (horizontal strain), the elastic modulus of the elastic layer, the magnitude of vibration acceleration to the predicted structure, and the vibration period. Stable immunity To obtain the characteristic may be determined the number of rigid layers and elastic layers.

  Further, in the present invention, the vibration damping body is preferably cylindrical, but may be another shape, for example, elliptical or square, and the hollow portion may be one, but instead, The seismic isolation support device may have a plurality of hollow portions, and vibration damping bodies may be disposed in each of the plurality of hollow portions to constitute the seismic isolation support device. Note that the ratio Pr / P0 does not have to be the same for each of the plurality of hollow portions, and the ratio Pr / P0 may be different, and the ratio Pr / P0 for each of the plurality of hollow portions is different. As described above, the ratio is preferably 1.00 or more, but the ratio Pr / P0 may be 1.00 or more for only a part of the plurality of hollow portions.

  According to the present invention, it is possible to eliminate stress concentration in at least a portion close to the upper plate or the lower plate in the laminate, and to restrain the vibration damping body disposed in the hollow portion of the laminate without any gap. As a result, the synergetic effect of the stress concentration cancellation and the restraint of the vibration damping body can provide stable seismic isolation characteristics, and in addition, the fatigue of the elastic layer of the laminate and the vibration damping body can be avoided. It is possible to provide a seismic isolation supporting device which is particularly excellent in durability and seismic isolation effect and manufacturability.

FIG. 1 is a cross-sectional explanatory view taken along the line II in FIG. 2 of a specific example of a preferred embodiment of the present invention. FIG. 2 is a partial cross-sectional plan view of the example shown in FIG. FIG. 3 is a partially enlarged sectional view of the example shown in FIG. FIG. 4 is a partially enlarged sectional view of the example shown in FIG. FIG. 5 is an operation explanatory view of the example shown in FIG. FIG. 6 is an explanatory view of the hysteresis characteristics of horizontal displacement and horizontal stress of the seismic isolation support device in which the ratio Pr / P0 is less than 1.00. FIG. 7 is an explanatory diagram of the hysteresis characteristics of horizontal displacement and horizontal stress in a preferred embodiment of the present invention. FIG. 8 is a partially sectional enlarged explanatory view of another specific example of the preferred embodiment of the present invention.

  Next, embodiments of the present invention will be described in more detail based on the preferred embodiments shown in the drawings. The present invention is not limited to these examples.

  1 to 4, the seismic isolation support device 1 of this example includes a disk-like upper plate 2 attached to an upper structure such as a building and a disk-like lower plate 3 attached to a lower structure such as a foundation. A plurality of annular rigid layers 4 and elastic layers 5 which are alternately laminated between the upper plate 2 and the lower plate 3 and are arranged concentrically with each other, a lower surface 6 of the upper plate 2 and an upper surface 7 of the lower plate 3. In addition, the hollow portion 10 defined by the inner peripheral surfaces 8 and 9 of the rigid layer 4 and the elastic layer 5 and the inner peripheral surface are vulcanized and bonded to the cylindrical outer peripheral surface 11 of the rigid layer 4 and the elastic layer 5 has a laminated body 14 having a cylindrical covering layer 13 integrated with a cylindrical outer peripheral surface 12 and a lead plug 15 as a vibration damping body disposed in the hollow portion 10.

  The upper plate 2 has a plurality of through holes 22 arranged along the outer peripheral surface 21 and a through hole 23 arranged in the center in addition to the annular upper surface 20 and the cylindrical outer peripheral surface 21. An annular upper flange plate 24 and an upper closing plate 26 that is fitted to the upper flange plate 24 in the through hole 23 and fixed to the upper flange plate 24 by a plurality of screws 25 are provided. Are defined by a hole 28 defined by a cylindrical inner peripheral surface 27 of the upper flange plate 24 and an inner peripheral surface 30 that communicates with the hole 28 and that communicates with the inner peripheral surface 27 via an annular stepped surface 29. The upper blocking plate 26 is in contact with the inner peripheral surface 27 with a cylindrical outer peripheral surface 32 and with the stepped surface 29 with an annular lower surface 33, respectively. Disk-like large diameter upper closure fitted in hole 28 larger in diameter than hole 31 34 and a disk-like small diameter upper closed portion 36 which is smaller in diameter than the large diameter upper closed portion 34 and which is in contact with the inner peripheral surface 30 at the cylindrical outer peripheral surface 35 and which is fitted in the hole 31 The lower surface 6 is provided integrally with the flat annular lower surface 38 of the upper flange plate 24 having the flat annular upper surface 37 and is flush with the upper surface 37. 37 and the flat circular lower surface 40 of the small-diameter upper blocking portion 36 integrated with the large-diameter upper blocking portion 34 having the flat circular upper surface 39 constituting the upper surface 20 in cooperation with 37, and thus rigid. The upper end portion of the hollow portion 10 in the vertical direction V in the stacking direction of the layer 4 and the elastic layer 5 in the vertical direction V is defined by the inner circumferential surface 30 and the lower surface 40. The upper end portion of the lead plug 15 in the Top and an outer surface comprising a cylindrical side is in contact without clearance on the inner peripheral surface 30 and lower surface 40.

  The lower plate 3 formed in the same manner as the upper plate 2 is arranged in the center of a plurality of through holes 52 arranged along the outer peripheral surface 51 in addition to the annular lower surface 50 and the cylindrical outer peripheral surface 51. An annular lower flange plate 54 having through holes 53 respectively, and a lower closing plate 56 fitted to the lower flange plate 54 in the through holes 53 and fixed to the lower flange plate 54 by a plurality of screws 55. The through hole 53 communicates with the hole 58 defined by the cylindrical inner peripheral surface 57 of the lower flange plate 54 and the inner peripheral surface via the annular step surface 59. The lower closing plate 56 has a cylindrical outer peripheral surface 62 on the inner peripheral surface 57 and a step on the annular upper surface 63. Fit into the hole 58 which is in contact with the surface 59 and larger in diameter than the hole 61 The disk-shaped large-diameter lower closed portion 64 and the large-diameter lower closed portion 64 have a diameter smaller than that of the large-diameter lower closed portion 64 and are in contact with the inner circumferential surface 60 at the cylindrical outer circumferential surface 65 and fitted in the hole 61 The upper surface 7 is integrally provided with the disc-like small diameter lower closing portion 66, and the upper surface 7 is against the flat annular upper surface 68 and the lower surface 67 of the lower flange plate 54 having the flat annular lower surface 67. The flat circular upper surface of the small-diameter lower blocking portion 66 integral with the large-diameter lower blocking portion 64 having the flat circular lower surface 69 that forms the lower surface 50 in cooperation with the lower surface 67. 70, and the lower end in the vertical direction V of the hollow portion 10 in the vertical direction V is defined by the inner circumferential surface 60 and the upper surface 70, and the lower end in such a direction is the lead in the vertical direction V The lower end of the plug 15 is arranged, the lower surface of the lower end of the lead plug 15 and the circle The outer surface including Jo sides are in contact without clearance on the inner peripheral surface 60 and upper surface 70.

  The plurality of rigid layers 4 concentrically stacked with each other at the center 81 and having the cylindrical outer circumferential surface 11 in addition to the cylindrical inner circumferential surface 8 are close to the upper plate 2 in the vertical direction V and vertical Two upper rigid layers 82 and 83 arranged side by side in the direction V, and two lower rigid layers 84 and 85 arranged adjacent to the lower plate 3 in the vertical direction V and arranged in the vertical direction V A plurality of middle rigid layers 86 arranged in the vertical direction V between the upper rigid layer 83 and the lower rigid layer 85 in the vertical direction V and having the same thickness (thickness) in the vertical direction V The plurality of middle rigid layers 86 in the plurality of rigid layers 4 are disposed at the upper portion, with t1 and the mutually equal intervals D at which the elastic layers 5 have the same thickness (thickness) t2 in the vertical direction V. Vertical to rigid layer 83 A plurality of layers disposed between the adjacent middle rigid layer 87 adjacent in the direction V, the adjacent middle rigid layer 88 adjacent in the vertical direction V to the lower rigid layer 85, and the adjacent middle rigid layers 87 and 88 in the vertical direction V And a middle middle rigid layer 89.

  The outer peripheral surface 11 of each of the upper rigid layers 82 and 83 is 3 × tr in the horizontal direction H that is perpendicular to the vertical direction V than the outer peripheral surface 11 of the adjacent intermediate portion rigid layer 87 (where tr is the upper plate) 2) the thickness in the stacking direction of the elastic layers 5 in the state where the load W in the vertical direction V is applied) or more, in other words, 3 × tr or more in the radial direction than the outer peripheral surface 11 of the adjacent intermediate portion rigid layer 87 The outer peripheral surface 11 of each of the lower rigid layers 84 and 85 is also arranged on the outer side by 3 × tr or more in the horizontal direction H from the outer peripheral surface 11 of the adjacent intermediate portion rigid layer 88, in other words, the adjacent intermediate portion. The upper rigid layer 82 as at least one upper rigid layer is arranged on the outer side in the radial direction by 3 × tr or more from the outer peripheral surface 11 of the rigid layer 88, and the lower rigid layer as at least one lower rigid layer The same diameter as the outer peripheral surface 11 of the rigid layer 84 The upper rigid layer 83 as the at least one other upper rigid layer has a diameter of the outer peripheral surface 11 of the lower rigid layer 85 as the at least one other lower rigid layer. The outer peripheral surface 11 of the upper rigid layer 82 and the lower rigid layer 84 is more horizontally oriented than the outer peripheral surface 11 of the upper rigid layer 83 and the lower rigid layer 85. In the outside in the radial direction by 3 × tr or more with respect to the outer peripheral surface 11 of each of the upper rigid layer 83 and the lower rigid layer 85. In the horizontal direction H, in other words, the outer circumferential surfaces 11 of the same are arranged at the same position in the radial direction, and in the horizontal direction H, in other words, adjacent intermediate portion rigid layers 87 arranged at the same position in the radial direction. And 88 husbands The outer peripheral surface 11 is arranged in the horizontal direction H in other words with respect to the outer peripheral surface 11 of the center-side intermediate rigid layer 89, in other words, at the same position in the radial direction, and in the upper rigid layers 82 and 83, the upper plate 2 In the horizontal direction H, the upper rigid layer 82, which is the uppermost rigid layer disposed closest to the upper rigid layer 82, is 3 × tr or more outside the outer circumferential surface 11 of the remaining upper rigid layer 83 except the upper rigid layer 82, in other words, It has an outer peripheral surface 11 that is arranged on the outer side in the radial direction by 3 × tr or more than the outer peripheral surface 11 of the upper rigid layer 83, and is located closest to the lower plate 3 in the lower rigid layers 84 and 85. The lower rigid layer 84 which is the lower rigid layer is outside in the horizontal direction H than the outer peripheral surface 11 of the remaining lower rigid layer 85 excluding the lower rigid layer 84, in other words, 3 × tr than the outer peripheral surface 11 of the lower rigid layer 85 Outside in the radial direction The outer circumferential surface 11 is disposed on the

  Thus, in the plurality of rigid layers 4, the upper rigid layers 82 and 83 and the lower rigid layers 84 and 85 respectively correspond to the upper rigid layer 83 and the lower rigid layer 85 of the plurality of middle rigid layers 86. Each of the adjacent intermediate portion rigid layers 87 and 88 has an outer peripheral surface 11 arranged on the outer side in the horizontal direction H with respect to the outer peripheral surface 11 of each of the adjacent intermediate portion rigid layers 87 and 88 adjacent in the vertical direction V. Is the same position in the horizontal direction H as the outer circumferential surface 11 of the central intermediate portion rigid layer 89 among the plurality of intermediate portion rigid layers 86 located on the center side of the adjacent intermediate portion rigid layers 87 and 88 in the vertical direction V The plurality of middle rigid layers 86 are arranged in the vertical direction V between the upper rigid layer 83 and the lower rigid layer 85, and the uppermost rigid layer is disposed. The upper rigid layer 82 is The lower rigid layer 84, which is the lowermost rigid layer, has the outer peripheral surface 11 disposed on the outer side in the horizontal direction H relative to the outer peripheral surface 11 of the upper rigid layer 83 and the outer peripheral surface 11 of the remaining lower rigid layer 85. Also in the horizontal direction H, there is an outer peripheral surface 11 disposed outside.

  The plurality of elastic layers 5 formed of a natural rubber annular rubber plate has an outer peripheral surface 12 disposed flush with the outer peripheral surface 11 of the upper rigid layer 82 and an upper flange plate 24 in the vertical direction V. The uppermost elastic layer 91 adjacent to the upper flange layer 24 has an upper surface 92 in the vertical direction V, and the upper surface 94 of the upper rigid layer 82 adjacent to the lower surface 93 in the vertical direction V in the vertical direction V. And the lowermost elastic layer 95 adjacent to the lower flange plate 54 in the vertical direction V and having the outer peripheral surface 12 disposed on the outer peripheral surface 11 of the lower rigid layer 84 in a vulcanized manner. The lower surface 98 of the lower rigid plate 84 in the vertical direction V is adjacent to the annular upper surface 68 of the lower flange plate 54 at the lower surface 96 in the vertical direction V, and in the vertical direction V at the upper surface 97 in the vertical direction V. It has an outer peripheral surface 12 which is bonded by vulcanization and arranged inside in the horizontal direction H than the outer peripheral surface 11 of the upper rigid layer 82, and is flush with the outer peripheral surface 11 of the upper rigid layer 83 The elastic layer 99 disposed between the upper rigid layers 82 and 83 in the vertical direction V is added to the lower surface 102 and the upper surface 103 of the upper rigid layers 82 and 83 respectively in the upper surface 100 and the lower surface 101 in the vertical direction V, respectively. It has an outer peripheral surface 12 which is bonded by vulcanization and which is disposed on the inner side in the horizontal direction H than the outer peripheral surface 11 of the lower rigid layer 84 while being flush with the outer peripheral surface 11 of the lower rigid layer 85 The elastic layer 104 disposed between the lower rigid layers 84 and 85 in the vertical direction V is the upper surface 107 and the lower surface of the lower rigid layers 84 and 85 at the lower surface 105 and the upper surface 106 in the vertical direction V, respectively. The outer peripheries of the upper rigid layer 83 and the lower rigid layer 85 are disposed on the inner side in the horizontal direction H with respect to the outer peripheral surface 11 of each of the upper rigid layer 83 and the lower rigid layer 85, respectively. The plurality of elastic layers 109 having the outer peripheral surface 12 arranged flush with the surface 11 and arranged between the upper rigid layer 83 and the lower rigid layer 85 in the vertical direction V are arranged on the upper surface 110 in the vertical direction V. And the lower surface 111 are respectively vulcanized and bonded to the lower surface 112 of the upper rigid layer 83 and the lower surface of the intermediate rigid layer 86 and the upper surface 113 of the lower rigid layer 85 and the upper surface 113 of the intermediate rigid layer 86, respectively.

  The covering layer 13 includes a covering portion 121 that covers the outer peripheral surface 11 of the upper rigid layers 82 and 83 and the outer peripheral surface 12 of the elastic layers 91 and 99, and the outer peripheral surface 11 and the elastic layers 95 and 104 of the lower rigid layers 84 and 85. The outer peripheral surface 12 of the intermediate rigid layer 86 between the upper rigid layer 83 and the lower rigid layer 85 in the vertical direction V and the outer peripheral surface 12 of the plurality of elastic layers 109. And the cylindrical covering portion 124 having the cylindrical outer peripheral surface 123 integrally, and each of the covering portions 121 and 122 is outside of the outer peripheral surface 123 in the horizontal direction H, in other words, The outer peripheral surface 123 has a cylindrical outer peripheral surface 125 arranged on the outer side in the radial direction, and each of the covering portions 121 and 122 and the covering portion 124 have a cylindrical outer peripheral surface having a concave arc surface. 12 It is connected integrally with the covering portion 127 having a.

  The inner peripheral surface 30 and the lower surface 40, the inner peripheral surface 60 and the upper surface 70, the inner peripheral surfaces 8 and 9, and the inner peripheral surface 30 and the hollow portion 10 arranged in the center of the laminate 14 in the horizontal direction H The lead plug 15 made of cylindrical lead, which is press-fitted and filled without gaps to the lower surface 40, the inner peripheral surface 60 and the upper surface 70, and the inner peripheral surfaces 8 and 9, causes the lower plate 3 to On the other hand, the vibration in the horizontal direction H of the upper plate 2 is damped and the load in the vertical direction V (downward force in the vertical direction V) from the upper structure through the upper plate 2 in cooperation with the laminate 14. The lead plug 15 supports the elastic layer even in a state where the load W in the vertical direction V from the upper structure to be supported is not applied to the upper plate 2 (under no load). The elastic layer protrudes in the horizontal direction H against the elastic layer 5 against the elastic force of 5 The inner circumferential surface 132 of the laminate 14 including the inner circumferential surfaces 8 and 9 is concave at the position of the inner circumferential surface 9 of the elastic layer 5 as a result of making the inner circumferential surface 9 of the elastic layer 5 concave. On the other hand, when the load W in the vertical direction V from the upper structure to be supported is applied to the upper plate 2 (under the load), the convexity 133 is provided at the position of the rigid layer 4. As a result, the layer 5 is compressed in the vertical direction V and the distance D corresponding to the thickness t2 of the elastic layer 5 is smaller than 2.5 mm, that is, the value of the thickness tr and the height h of the seismic isolation support device 1 is reduced. The lead plug 15 pressed into and filled in the hollow portion 10 protrudes in the horizontal direction H by the elastic layer 5 against the elastic force of the elastic layer 5 and bites into the elastic layer 5, and the inner circumferential surface 9 of the elastic layer 5 Into a concave surface 131 which is recessed in the horizontal direction (shearing direction) H more largely.

The lead plug 15 is a reaction force (vertical direction) from the lead plug 15 to the lower surface 40 of the small diameter upper closed portion 36 in a state in which the load W in the vertical direction V from the upper structure to be supported is applied to the upper plate 2 Surface pressure Pr (= Fr / (area of lower surface 40 of small-diameter upper closing portion 36) N / m ² , where N is newton, the same applies) to the load W of the laminate 14 The hollow portion so that the ratio Pr / P0 to the surface pressure P0 (= W / (pressure receiving area relative to the load W of the laminated body 14) N / m ² ) based on the load W on the pressure receiving surface is 1.00 or more 10 are densely arranged. In this example, the pressure receiving area with respect to the load W of the laminated body 14 is the area of the upper surface 113 of the intermediate rigid layer 86 that is the common pressure receiving surface in the vertical direction V in the rigid layer 4.

  The above-described seismic isolation support device 1 has an upper portion through an anchor bolt in which the upper flange plate 24 is inserted in the through hole 22 to a lower structure via the anchor bolt in which the lower flange plate 54 is inserted into the through hole 52 The upper structure 20 receives the load W of the upper structure and the load W in the vertical direction V applied to the upper surface 20 is laminated to the laminated body 14. And vibrational energy of the upper plate 2 in the horizontal direction H with respect to the lower plate 3 is absorbed by plastic deformation of the lead plug 15 so as to attenuate the vibration in the horizontal direction H of the upper plate 2 The transmission of the vibration of the lower plate 3 in the horizontal direction H to the upper plate 2 is suppressed by the shear elastic deformation of the laminated body 14 in the horizontal direction H and the plastic deformation of the lead plug 15 in the horizontal direction H.

  When manufacturing the seismic isolation support device 1, first, on the lower plate 3 having the lower flange plate 54 and the lower closing plate 56 fixed to the lower flange plate 54, an annular thickness serving as the elastic layer 5. After alternately laminating a plurality of rubber plates with a thickness t2 = 2.5 mm and a plurality of steel plates with an annular thickness t1 = 1.6 mm to be the rigid layer 4, the laminated lower plate 3 and rubber plate And the upper flange plate 24 is placed on the steel plate, and a rubber sheet having a thickness of about 2 mm which covers the outer peripheral surface of the rubber plate and the steel plate to form the covering layer 13 is stuck to the rubber plate and the steel plate These are fixed to each other by vulcanization bonding under pressure or the like, and then lead is pressed into the hollow portion 10 through the through holes 23 in order to form the lead plug 15 in the hollow portion 10. The lead is pressed into the hollow portion 10 through the through hole 23 with a hydraulic ram or the like so that the lead plug 15 is restrained in the hollow portion 10 with no gap with respect to the laminate 14. After press-fitting, the upper blocking plate 26 is disposed in the through hole 23 so that the lead pressed into the hollow portion 10 is further pushed into the hollow portion 10 by the upper blocking plate 26, and the upper blocking plate 26 is flanged through the screw 25. Secure to the plate 24.

  In order to confirm that the manufactured seismic isolation support device 1 has the ratio Pr / P0 of 1.00 or more, in other words, to manufacture the seismic isolation support device 1 with the ratio Pr / P0 of 1.00 or more. In addition, a temporary upper blocking plate corresponding to the upper blocking plate 26 and having pores is prepared, a load cell (pressure sensor) is attached to the lower surface of the temporary upper blocking plate, and lead wires from the load cell are temporarily connected. A load W that is to be supported by the seismic isolation support device 1 is applied to the upper plate 2 that is derived from the pores of the upper closing plate and the temporary upper closing plate is fixed to the upper flange plate 24 via the screw 25. In this state, the electrical signal of the derived lead wire is measured, the surface pressure Pr is detected from the measured electrical signal, the ratio Pr / P0 is obtained from the detected surface pressure Pr and the surface pressure P0, and the ratio Pr When / P0 is 1.00 or more, the load W applied to the upper plate 2 Release the temporary upper closing plate from the upper flange plate 24, replace the temporary upper closing plate with the original upper closing plate 26, and fix the original upper closing plate 26 to the upper flange plate 24 via the screw 25. When the ratio Pr / P0 is smaller than 1.00, the load W applied to the upper plate 2 is released, the temporary upper closing plate is removed from the upper flange plate 24, and the through hole 23 is formed in the hollow portion 10. Press in additional lead through. The pressing of the additional lead into the hollow portion 10 is performed by pressing the additional lead into the upper portion of the hollow portion 10 with a hydraulic ram or the like. After press-fitting additional lead into the hollow portion 10, the temporary upper closing plate with a load cell is fixed again to the upper flange plate 24 via the screw 25, and the ratio Pr / P0 is obtained in the same manner as described above, and the ratio Pr / When P0 is 1.00 or more, the original upper closing plate 26 is fixed to the upper flange plate 24 via the screw 25 instead of the temporary upper closing plate in the same manner as described above, while the ratio Pr / P0 Is smaller than 1.00, the above-described additional lead press-fitting into the hollow portion 10 is repeated until the ratio Pr / P0 is equal to or greater than 1.00.

  When the ratio Pr / P0 is 1.00 or more, the inner circumferential surface 9 of the elastic layer 5 may not be deformed into the concave surface 131 with no load (W = 0).

  In the seismic isolation support device 1 thus manufactured, since the ratio Pr / P0 is 1.00 or more, the elastic layer 5 and the rigid layer 4 as well as the upper plate 2 have no gaps in the lead plug 15 disposed in the hollow portion 10. And as a result of being able to be restrained by the lower plate 3, stable seismic isolation characteristics can be obtained, and in addition, fatigue of the elastic layer 5 and the lead plug 15 can be avoided, and particularly excellent durability and seismic isolation effect and manufacturing Sex can be obtained.

  In the above-described seismic isolation support device 1, an earthquake or the like occurs and the lower structure vibrates in the horizontal direction H with respect to the upper structure, and as shown in FIG. By this, the upper structure is isolated from the vibration of the lower structure in the horizontal direction H, and the lead plug 15 is plastically deformed. The vibration energy of the upper structure relative to the lower structure is absorbed to attenuate the vibration. When the laminate 14 is sheared and deformed in the horizontal direction H, the lower rigid layer 85 is horizontally displaced in the horizontal direction H1 with respect to the lower rigid layer 84, and the adjacent intermediate rigid layer 88 is horizontal with respect to the lower rigid layer 85. Horizontally displaced in the direction H1, and the plurality of middle rigid layers 86 are horizontally displaced stepwise in the horizontal direction H1 toward the upper rigid layer 83, and similarly, the upper rigid layers 83 The upper rigid layer 82 is horizontally displaced in the horizontal direction H1 with respect to the upper rigid layer 83. In this horizontal displacement, the lower rigid layer 84 has the outer peripheral surface 11 disposed radially outward from the center 81 with respect to the outer peripheral surface 11 of the lower rigid layer 85, in other words, the lower rigid layer 84. Has a larger diameter than the diameter of the lower rigid layer 85, and supports the lower rigid layer 85, and the lower rigid layers 84 and 85 are located from the center 81 rather than the outer peripheral surface 11 of the intermediate rigid layer 86. Since the outer peripheral surface 11 is disposed radially outward, in other words, the lower rigid layers 84 and 85 have a diameter larger than that of the intermediate rigid layer 86, the intermediate portion As a result of supporting the rigid layer 86, mainly the adjacent intermediate rigid layer 88, stress concentration on the compression side (fillet portion) close to the lower plate 3 of the laminate 14 is less likely to occur and the possibility of buckling can be eliminated. On the other hand, without increasing the size of the device There can be exhibited the seismic isolation function inherent. The upper rigid layer 82 and the upper rigid layers 82 and 83 also act in the same manner as the lower rigid layers 84 and 85 in such horizontal displacement in relation to the upper rigid layer 83 and the middle rigid layer 86 to form a laminate. 14, it is difficult to cause stress concentration in the compression side portion (fillet portion) adjacent to the upper plate 2, thereby eliminating the risk of buckling. On the other hand, the seismic isolation function inherent to the device without increasing the size of the device is provided. It can be demonstrated.

  And, in the seismic isolation support device with the ratio Pr / P0 less than 1.00, the hysteresis characteristics as shown in FIG. 6 are obtained, and in the seismic isolation support device 1 with the ratio Pr / P0 of 1.00 or more, Although it has been confirmed that the hysteresis characteristics as shown in FIG. 7 are obtained, as is clear from such history characteristics, in the seismic isolation support device having the ratio Pr / P0 of less than 1.00, a dent indicated by an arrow occurs. In addition to the unstable seismic isolation characteristics, it can be inferred that the trigger function can not be favorably obtained, but in the seismic isolation support device 1 with the ratio Pr / P0 of 1.00 or more, there is no dent and stable seismic isolation In addition to being a characteristic, it can be inferred that it has a trigger function and can preferably respond to earthquakes of large amplitude. In addition, it could be inferred that when the ratio Pr / P0 is 2.00 or more, the above-mentioned stable seismic isolation characteristics, the improvement of the trigger function, and the correspondence to large amplitude earthquakes occur remarkably. And when ratio Pr / P0 was 5.90 or less, it turned out that the press injection of lead to hollow part 10 in manufacture is easy, and does not accompany so much. In addition, lead has been tried to be pressed into the hollow portion 10 so that the ratio Pr / P0 exceeds 5.90, but it may be difficult to do this without damaging the inner peripheral surface 15 of the elastic layer 5. found.

  In the above example, the rigid layer 4 has the upper rigid layer 83 having the outer peripheral surface 11 and the outer peripheral surface 11 positioned on the outer side in the radial direction when viewed from the center 81 with respect to the outer peripheral surface 11 of the upper rigid layer 83. An upper rigid layer 84 having an upper rigid layer 82, a lower rigid layer 85 having an outer peripheral surface 11, and an outer peripheral surface 11 positioned radially outside the outer peripheral surface 11 of the lower rigid layer 85 as viewed from the center 81. In place of the rigid layer 4, for example, as shown in FIG. 8, the lower rigid layer 84 having the outer peripheral surface 11, and the outer peripheral surface 11 and the center 81 of the lower rigid layer 84 are viewed from the center 81. And the lower rigid layer 85 arranged in the vertical direction V with respect to the lower rigid layer 84, and the outer peripheral surface 11. And the outer peripheral surface 11 of the upper rigid layer 82 and the center It may be provided with a upper rigid layer 83 disposed side by side in the vertical direction V with respect to the upper rigid layer 82 and has a peripheral surface 11 which is located at the same position in the radial direction as viewed from 1.

  In the formation of the laminate 14 by vulcanization bonding under pressure in a mold, the cylindrical covering layer 13 is formed by the overhang of the outer peripheral edge of the elastic layer 5 without using the rubber sheet to be the covering layer 13 You may do it.

DESCRIPTION OF SYMBOLS 1 Seismic isolation support apparatus 2 Upper plate 3 Lower plate 4 Rigid layer 5 Elastic layer 6 Lower surface 7 Upper surface 8, 9 Inner peripheral surface 10 Hollow part 11 Outer peripheral surface 12 Outer peripheral surface 13 Covering layer 14 Laminated body 15 Lead plug

Claims (9)

  Defined by the upper and lower plates, the rigid and elastic layers laminated alternately between the upper and lower plates, the lower surface of the upper plate and the upper surface of the lower plate, and the inner peripheral surfaces of the rigid and elastic layers, respectively. Each of which has a hollow portion and a vibration damping body disposed in the hollow portion of the laminate, and the load in the lamination direction of the rigid layer and the elastic layer applied to the upper plate is laminated. And the lower plate is supported via a vibration damping body, and the rigid layer includes at least one upper rigid layer, at least one lower rigid layer, at least one upper rigid layer and at least one in the stacking direction. And a plurality of middle rigid layers arranged in the stacking direction among the two lower rigid layers, at least one of the at least one upper rigid layer and the at least one lower rigid layer being a plurality of middle portions Each of the rigid layers It has an outer peripheral surface located outside in the direction orthogonal to the stacking direction rather than the circumferential surface, and the surface pressure Pr from the vibration damping body to the upper plate based on the load in the stacking direction to support and the load The seismic isolation support device by which a vibration damping body is distribute | arranged to a hollow part so that ratio Pr / P0 with respect to the surface pressure P0 based on the said load in a pressure receiving surface may become 1.00 or more.   An adjacent intermediate rigid layer adjacent to at least one of at least one upper rigid layer and at least one lower rigid layer in the stacking direction among the plurality of intermediate rigid layers is stacked among the plurality of intermediate rigid layers. In the direction perpendicular to the laminating direction with the outer peripheral surface of the central intermediate rigid layer located on the center side of the adjacent intermediate rigid layer in the direction or the laminating direction from the outer peripheral surface of the central intermediate rigid layer The seismic isolation support device according to claim 1, further comprising an outer peripheral surface positioned on an outer side in a direction orthogonal to.   The rigid layer is arranged side by side in the stacking direction with respect to the at least one upper rigid layer and has an outer circumferential surface located at the same position in a direction orthogonal to the outer circumferential surface of the at least one upper rigid layer The seismic isolation support device according to claim 1, further comprising at least one other upper rigid layer.   The rigid layer includes a plurality of upper rigid layers including at least one upper rigid layer and arranged side by side in the stacking direction with respect to each other, and the upper layer in the stacking direction among the plurality of upper rigid layers. The uppermost rigid layer disposed closest to the uppermost rigid layer has an outer peripheral surface located on the outer side in a direction orthogonal to the stacking direction with respect to the outer peripheral surface of the upper rigid layer excluding the uppermost rigid layer. 2. The seismic isolation support device according to 2.   The rigid layer is arranged side by side in the stacking direction with respect to the at least one lower rigid layer and has an outer circumferential surface located at the same position in a direction orthogonal to the outer circumferential surface of the at least one lower rigid layer 5. The seismic isolation and support device according to any one of claims 1 to 4, further comprising at least one other lower rigid layer.   The rigid layer comprises at least one lower rigid layer and a plurality of lower rigid layers arranged side by side in the stacking direction with respect to each other, and of the plurality of lower rigid layers in the stacking direction in the lower plate The lowermost rigid layer disposed closest to the lowermost rigid layer has an outer peripheral surface located on the outer side in a direction orthogonal to the stacking direction from the outer peripheral surface of the lower rigid layer excluding the lowermost rigid layer. The seismic isolation support apparatus of any one of 4.   The laminate further includes a cylindrical covering layer that is bonded to the outer peripheral surface of the rigid layer and integrated with the outer peripheral surface of the elastic layer, and includes an upper rigid layer and a lower rigid layer of the covering layer. The covering portion covering at least one of the covering layers has an outer peripheral surface located on the outer side in a direction perpendicular to the stacking direction with respect to the outer peripheral surface of the covering portion covering the intermediate rigid layer of the covering layers. The seismic isolation support apparatus according to any one of claims 1 to 6, wherein   The seismic isolation support device according to any one of claims 1 to 7, wherein the vibration damping body is disposed in the hollow portion with no gap with respect to the rigid layer and the elastic layer and the upper plate and the lower plate. Vibration of a direction perpendicular to the stacking direction of the upper plate with respect to the lower plate is damped by plastic deformation of the vibration damping body, while transmission of vibration to the upper plate in the direction perpendicular to the stacking direction of the lower plate is The seismic isolation support device according to any one of claims 1 to 8, wherein the seismic isolation support device is configured to be suppressed by shear elastic deformation.

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