Mounting structure of seismic isolation device

Abstract

To reduce stress acting on a bolt in an attachment structure of a seismic isolator.SOLUTION: An attachment structure of a seismic isolator includes a seismic isolator 10 having laminated rubber (seismic isolation laminated rubber) 11, and attachment plates 12, 13 provided at ends of the laminated rubber 11 and respectively attached to structures (support members) 101, 111. Space parts 16, 16A, 16B are provided at positions of the structures 101, 111 which outer edge parts of the attachment plates 12, 13 face in a state that the attachment plates 12, 13 are attached to the structures 101, 111.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD

[0001] The present invention relates to a mounting structure for a seismic isolation device.

BACKGROUND ART

[0002] Structures such as steel towers, towers, and high-rise buildings are prone to large shaking when subjected to forces from seismic motion. Therefore, seismic isolation devices are known as devices that absorb vibrational energy input to buildings. A seismic isolation device is, for example, disposed between a foundation and a building. A seismic isolation device generally has laminated rubber configured by stacking a plurality of rubber plates and steel plates in layers. A seismic isolation device is configured such that mounting plates are fixed to the top and bottom of the laminated rubber respectively. In the seismic isolation device, the outer peripheral portions of the upper and lower mounting plates are fastened to the foundation and the building respectively by a plurality of bolts. Examples of such a seismic isolation device include those described in the following patent documents.

PRIOR ART DOCUMENTS

PATENT DOCUMENTS

[0003]

PATENT DOCUMENT 1

SUMMARY OF THE INVENTION

PROBLEM TO BE SOLVED BY THE INVENTION

[0004] When a load in the direction of separating from the foundation and the building acts on the seismic isolation device, tensile stress acts on each of the bolts that fasten the foundation and the mounting plate, and the building and the mounting plate respectively, causing the bolts to elongate. At this time, the mounting plate elastically deforms with the outer edge portion in contact with the mounting surface of the foundation or the building as a fulcrum. That is, the outer edge of the mounting plate serves as the fulcrum of a lever, and the fastening position by the bolt serves as the point of action of the lever. When the plate thickness of the mounting plate is small, the outer edge portion of the laminated rubber serves as the point of force of the lever, which causes the problem that the reaction force received by the bolt at the point of action of the lever increases. On the other hand, although it is conceivable to increase the plate thickness of the mounting plate, this leads to an increase in weight and a rise in manufacturing cost.

[0005] The present invention aims to solve the above-mentioned problems and to provide a mounting structure for a seismic isolation device that reduces the stress acting on the bolts. [Means for solving the problem]

[0006] The mounting structure for the seismic isolation device to achieve the above objective comprises a seismic isolation laminated rubber and a mounting plate provided at the end of the seismic isolation laminated rubber and attached to a support member, wherein a space is provided on the support member at a position where the outer edges of the mounting plate face each other when the mounting plate is attached to the support member.

[0007] In a preferred embodiment of the mounting structure for the seismic isolation device of the present invention, the mounting plate is provided with a plurality of mounting holes spaced apart in the circumferential direction, a plurality of bolts are inserted through each of the plurality of mounting holes and fastened to the support member, and the space is provided on the outer edge side of the mounting plate relative to the bolts.

[0008] In a preferred embodiment of the mounting structure for the seismic isolation device of the present invention, the mounting plate comprises an upper mounting plate provided on the upper part of the seismic isolation laminated rubber and a lower mounting plate provided on the lower part of the seismic isolation laminated rubber, the support member comprises an upper support member to which the upper mounting plate is attached and a lower support member to which the lower mounting plate is attached, and the space is provided in at least one of the upper support member and the lower support member.

[0009] In a preferred embodiment of the mounting structure for the seismic isolation device of the present invention, the space comprises an upper space provided in the upper mounting plate and a lower space provided in the lower mounting plate.

[0010] In a preferred embodiment of the mounting structure for the seismic isolation device of the present invention, the space is provided continuously around the entire circumference of the mounting plate.

[0011] In a preferred embodiment of the mounting structure for the seismic isolation device of the present invention, the support member comprises a base plate and a base plate fixed to the base plate, the mounting plate is attached to the base plate in contact with the base plate, and the space is provided on the outer edge side of the base plate.

[0012] In a preferred embodiment of the mounting structure for the seismic isolation device of the present invention, the space is a recess provided on the mounting surface of the support member facing the outer edge of the mounting plate. [Effects of the Invention]

[0013] According to the seismic isolation device mounting structure of the present invention, it is possible to reduce the stress acting on the bolts. [Brief explanation of the drawing]

[0014] [Figure 1] Figure 1 is a schematic diagram showing the seismic isolation device of the first embodiment. [Figure 2] Figure 2 is a longitudinal cross-sectional view showing the mounting structure of the seismic isolation device. [Figure 3] Figure 3 is a longitudinal cross-sectional view showing the deformation state of the lower mounting plate when a load is applied. [Figure 4] Figure 4 is a longitudinal cross-sectional view showing the mounting structure of the seismic isolation device in the second embodiment. [Figure 5] Figure 5 is a longitudinal cross-sectional view showing the mounting structure of the seismic isolation device according to the third embodiment. [Modes for carrying out the invention]

[0015] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. However, the present invention is not limited by these embodiments. Furthermore, the components in the embodiments include those that are easily conceivable by those skilled in the art, those that are substantially identical, and so-called equivalents. In addition, if there are multiple embodiments, they may be constructed by combining each embodiment.

[0016] [First Embodiment] <Structure of Seismic Isolation Device> Figure 1 is a schematic diagram illustrating the seismic isolation device of the first embodiment.

[0017] As shown in Figure 1, the seismic isolation device 10 of the first embodiment is disposed between an upper structure (support member, upper support member) 101 and a lower structure (support member, lower support member) 111. The upper portion of the seismic isolation device 10 is fixed to the lower surface 102 of the upper structure 101, and the lower portion thereof is fixed to the upper surface 112 of the lower structure 111. Here, the upper structure 101 is, for example, a building, and the lower structure 111 is, for example, a foundation (such as a concrete structure). However, the upper structure 101 may be another structure fixed to the lower portion of the building, and the lower structure 111 may be another structure fixed to the upper surface of the foundation. Moreover, the seismic isolation device 10 may be disposed not only between the foundation and the building, but also between respective floors of the building, for example, between a low-rise portion and a high-rise portion of the building.

[0018] The seismic isolation device 10 includes a laminated rubber (seismic isolation laminated rubber) 11, an upper mounting plate (mounting plate) 12, and a lower mounting plate (mounting plate) 13.

[0019] The laminated rubber 11 is formed by alternately stacking a plurality of rubber plates and a plurality of steel plates in the thickness direction (vertical direction). The upper mounting plate 12 is integrally fixed to the upper surface of the laminated rubber 11. The lower mounting plate 13 is integrally fixed to the lower surface of the laminated rubber 11.

[0020] The laminated rubber 11 has a cylindrical shape centered on a vertical axis O. The upper mounting plate 12 and the lower mounting plate 13 have a disc shape centered on the vertical axis O. The outer diameter of the upper mounting plate 12 and the lower mounting plate 13 is larger than the outer diameter of the laminated rubber 11. However, the laminated rubber 11 is not limited to a cylindrical shape, and may have a prismatic shape. Further, the upper mounting plate 12 and the lower mounting plate 13 are not limited to a disc shape, and may have a polygonal plate shape.

[0021] In the seismic isolation device 10, the upper surface of the upper mounting plate 12 is in close contact with the anchor plate 20 fixed to the lower surface 102 of the upper structure 101, and is fastened to the upper structure 101 by a plurality of upper bolts 14. The plurality of upper bolts 14 are arranged at intervals in the circumferential direction on the outer peripheral portion of the upper mounting plate 12, pass through the upper mounting plate 12, and are screwed into the upper structure 101. Further, in the seismic isolation device 10, the lower surface of the lower mounting plate 13 is in close contact with the anchor plate 21 fixed to the upper surface 112 of the lower structure 111, and is fastened to the lower structure 111 by a plurality of lower bolts 15. The plurality of lower bolts 15 are arranged at intervals in the circumferential direction on the outer peripheral portion of the lower mounting plate 13, pass through the lower mounting plate 13, and are screwed into the lower structure 111.

[0022] When an earthquake occurs, relative displacement such as in the horizontal direction is generated between the upper structure 101 and the lower structure 111. The seismic isolation device 10 absorbs the shaking of the upper structure 101 displaced in the horizontal direction and the like by the laminated rubber 11, blocks the transmission of vibration energy from the lower structure 111 to the upper structure 101, and reduces the shaking of the upper structure 101.

[0023] <Mounting Structure for Seismic Isolation Device> Figure 2 is a vertical cross-sectional view showing the mounting structure of the seismic isolation device.

[0024] Hereinafter, the mounting structure of the seismic isolation device 10 will be described, and here, the mounting structure between the lower mounting plate 13 fixed to the lower portion of the laminated rubber 11 and the lower structure 111 will be described. Note that the mounting structure between the upper mounting plate 12 fixed to the upper portion of the laminated rubber 11 and the upper structure 101 is also substantially the same structure.

[0025] As shown in Figure 2, the seismic isolation device 10 includes a laminated rubber 11, an upper mounting plate 12, and a lower mounting plate 13. In the mounting structure of the seismic isolation device according to the first embodiment, with the lower mounting plate 13 of the seismic isolation device 10 mounted on the lower structure 111, a lower space portion 16 is provided at a position facing the outer edge portion of the lower mounting plate 13 in the lower structure 111.

[0026] The anchor plate (foundation plate) 21 is fixed to the substructure 111. The anchor plate 21 has a ring or disc shape centered on the vertical axis O (see Figure 1). The outer diameter of the anchor plate 21 is smaller than that of the lower mounting plate 13. In other words, the outer end surface of the anchor plate 21 is located radially inward from the outer end surface of the lower mounting plate 13. If the upper mounting plate 12 is polygonal, it is preferable that the anchor plate 21 also has the same shape as the upper mounting plate 12. Even in this case, the outer end surface of the anchor plate 21 is located radially inward from the outer end surface of the lower mounting plate 13. The anchor plate 21 is placed on and fixed to the upper surface 112 of the substructure 111. The upper surface 21a of the anchor plate 21 has a predetermined step vertically from the upper surface 112 of the substructure 111.

[0027] The lower mounting plate 13 is disc-shaped and has an outer diameter larger than the outer diameter of the laminated rubber 11. The lower mounting plate 13 has mounting holes 31 formed on its outer circumference, which is radially outward from the laminated rubber 11, and are aligned vertically. The mounting holes 31 are circular holes centered on the vertical axis O1 and penetrate the lower mounting plate 13 in the thickness direction. Multiple mounting holes 31 are formed at intervals (preferably equal intervals) in the circumferential direction centered on the vertical axis O (see Figure 1).

[0028] The lower structure 111 has a cap nut 41 embedded below the anchor plate 21. The cap nut 41 is cylindrical in shape, with an open end at the top in the vertical direction and a closed end at the bottom in the vertical direction. The cap nut 41 has a female threaded portion 41a formed on its inner circumferential surface. The cap nut 41 is positioned at approximately the same location as the multiple mounting holes 31 formed in the lower mounting plate 13. That is, the multiple cap nuts 41 are provided along the vertical axis O1 and, like the mounting holes 31, are formed at intervals (preferably equal intervals) in the circumferential direction centered on the vertical axis O (see Figure 1). In this embodiment, the cap nut 41 is a cap nut with a projection, but this configuration is not limited to this, and for example, a bolt with a projection may be used. Alternatively, a general nut may also be used.

[0029] Furthermore, the anchor plate 21 has through holes 22 formed at the positions of each mounting hole 31 and each cap nut 41 of the lower mounting plate 13. The through holes 22 are formed to penetrate along the vertical axis O1 and, like the mounting holes 31 and cap nuts 41, are formed at intervals (preferably equal intervals) in the circumferential direction centered on the vertical axis O (see Figure 1). In other words, the mounting holes 31 of the lower mounting plate 13, the through holes 22 of the anchor plate 21, and the cap nuts 41 are all positioned on the vertical axis O1.

[0030] The lower bolt 15 has a head 15a, a shaft 15b, and a male threaded portion 15c. The tip (lower end) of the lower bolt 15 is inserted from above in the vertical direction through the mounting hole 31 of the lower mounting plate 13 and the through hole 22 of the anchor plate 21, and the male threaded portion 15c is screwed into the female threaded portion 41a of the cap nut 41. The seismic isolation device 10 is fixed to the lower structure 111 by fastening the lower mounting plate 13 to the lower structure 111 with the lower bolt 15.

[0031] The lower space 16 is provided on the radially outward side of the anchor plate 21, facing the lower surface 13b of the lower mounting plate 13. In the first embodiment, the anchor plate 21 is integrally fixed to the lower structure 111, whereas in the first embodiment, the lower structure 111 is a foundation plate, the anchor plate 21 is a foundation plate, and the lower structure 111 includes the anchor plate 21.

[0032] The lower mounting plate 13 has an upper surface 13a and a lower surface 13b that are parallel. That is, the lower mounting plate 13 has a constant thickness at all horizontal positions. The anchor plate 21 has an upper surface 21a and a lower surface 21b that are parallel. That is, the anchor plate 21 has a constant thickness at all horizontal positions. The lower space 16 is provided below the outer edge of the lower mounting plate 13. The lower space 16 is provided continuously around the entire circumference below the lower surface 13b of the outer edge of the lower mounting plate 13. However, the lower space 16 may be provided in a part of the circumferential direction (e.g., 180 degrees) below the lower surface 13b of the lower mounting plate 13 depending on the load acting on the seismic isolation device 10. The lower space 16 is provided radially outward from each lower bolt 15 and each through hole 22 of the anchor plate 21.

[0033] The lower space 16 is a space formed by the lower surface 13b of the outer edge of the lower mounting plate 13, the outer end surface 21c of the anchor plate 21, and the upper surface 112 of the lower structure 111. The lower space 16 has a constant vertical height. The lower space 16 is a space formed because the outer diameter of the anchor plate 21 is smaller than the outer diameter of the lower mounting plate 13.

[0034] The anchor plate 21 has an upper surface 21a that contacts the lower surface 13b of the lower mounting plate 13, and a lower surface 21b that contacts the upper surface 112 of the lower structure 111. The anchor plate 21 is not positioned radially outward from the outer end surface 21c, and the lower surface 13b of the lower mounting plate 13 and the upper surface 112 of the lower structure 111 do not come into contact. As a result, a lower space 16 is formed between the lower surface 13b of the lower mounting plate 13 and the upper surface 112 of the lower structure 111, with a vertical gap S. The gap S is the thickness of the anchor plate 21 and is constant radially outward from the intersection P of the lower surface 13b of the lower mounting plate 13 and the outer end surface 21c of the anchor plate 21. The radial position of the intersection P is preferably such that the distance D1 from the outer surface of the lower bolt 15 to the intersection P is shorter than the distance D2 from the intersection P to the outer end surface 13c of the lower mounting plate 13. For example, it is preferable to provide a distance D2 of 1 cm or more and a gap S of 1 cm or more.

[0035] The lower space 16 only needs to be provided at a position facing the lower surface 13b of the outer edge of the lower mounting plate 13, and the upper surface 112 of the lower structure 111 may protrude upward radially outward from the outer end surface 13c of the lower mounting plate 13.

[0036] Furthermore, in the first embodiment, a lower space 16 is provided between the lower mounting plate 13 and the lower structure 111. As a modification of the first embodiment, a flexible member 17 that can deform in accordance with the deformation of the lower mounting plate 13 is arranged in the space 16. It is preferable that the flexible member 17 be made of a material softer than the lower mounting plate 13, such as a foaming agent, resin material, or rubber material.

[0037] Furthermore, while the lower space 16 has been described in relation to the fastening structure between the lower mounting plate 13 and the lower structure 111, an upper space is provided in the upper mounting plate 12 in relation to the fastening structure between the upper mounting plate 12 and the upper structure 101, although this is not shown in the figures.

[0038] <Activation of seismic isolation device> Figure 3 is a longitudinal cross-sectional view showing the deformation state of the lower mounting plate when a load is applied.

[0039] As shown in Figure 2, when a load is applied between the superstructure 101 and the substructure 111 in a direction that separates them (for example, horizontally), the seismic isolation device 10 may experience upward tensile stress on the substructure 111. In this case, the lower mounting plate 13 of the seismic isolation device 10 undergoes elastic deformation due to this tensile stress. That is, as shown in Figure 3, when the lower bolt 15 receives upward tensile stress and stretches upward in the axial direction, the lower mounting plate 13 deforms so that the portion fastened to the substructure 111 by the lower bolt 15 moves upward. In other words, the lower mounting plate 13 rotates slightly clockwise in Figure 3, with the intersection point P between the lower surface 13b and the upper surface 21a of the anchor plate 21 as the pivot point.

[0040] The lower space 16 is provided in the lower structure 111, creating a gap S between the lower surface 13b of the lower mounting plate 13 and the upper surface 112 of the lower structure 111. As a result, the outer edge of the lower mounting plate 13 is prevented from contacting the upper surface 112 of the lower structure 111. When the outer edge of the lower mounting plate 13 does not contact the upper surface 112 of the lower structure 111, the outer edge does not act as a fulcrum of a lever, and no stress acts on the outer edge side of the lower mounting plate 13. As a result, deformation of the outer edge of the lower mounting plate 13 is suppressed, and the tensile stress acting on the lower bolt 15 is reduced.

[0041] [Second Embodiment] Figure 4 is a longitudinal cross-sectional view showing the mounting structure of the seismic isolation device of the second embodiment. Note that components having the same function as those in the first embodiment described above are denoted by the same reference numerals, and detailed descriptions are omitted.

[0042] As shown in Figure 4, the mounting structure of the seismic isolation device in the second embodiment is the same as in the first embodiment, in which a space 16A is provided at a position where the outer edges of the lower structure 111 and the lower mounting plate 13 face each other, with the lower mounting plate 13 of the seismic isolation device 10 attached to the lower structure 111. Here, the laminated rubber 11, the upper mounting plate 12 and the lower mounting plate 13 are the same as in the first embodiment, and their explanation is omitted.

[0043] The lower structure 111 has a recess 113 formed on its upper surface 112 that is recessed vertically downward. The recess 113 is disc-shaped with the vertical axis O (see Figure 1) as its center. The outer diameter of the recess 113 is larger than that of the lower mounting plate 13. The anchor plate 21A is disc-shaped with the vertical axis O (see Figure 1) as its center. The outer diameter of the anchor plate 21A is larger than that of the lower mounting plate 13 and is approximately the same diameter as that of the recess 113. The anchor plate 21A is placed in and fixed to the recess 113 of the lower structure 111. Preferably, the upper surface 21a of the anchor plate 21A is continuous with the upper surface 112 of the lower structure 111 as a flat surface without any steps in the vertical direction.

[0044] The filler plate (foundation plate) 23 is fixed to the anchor plate 21A. The filler plate 23 has a disc shape centered on the vertical axis O (see Figure 1). The outer diameter of the filler plate 23 is smaller than that of the lower mounting plate 13. In other words, the outer end surface of the filler plate 23 is located radially inward from the outer end surface of the lower mounting plate 13. The filler plate 23 is positioned and fixed between the upper surface 112 of the lower structure 111 and the lower surface 13b of the lower mounting plate 13. The upper surface 23a of the filler plate 23 has a predetermined step vertically from the upper surface 21a of the anchor plate 21A.

[0045] The lower space 16A is provided on the radially outward side of the filler plate 23, facing the lower surface 13b of the lower mounting plate 13. In the second embodiment, the anchor plate 21A and the filler plate 23 are integrally fixed to the lower structure 111, whereas the filler plate 23 is a foundation plate, and the lower structure 111 includes the anchor plate 21A and the filler plate 23.

[0046] The filler plate 23 has an upper surface 23a and a lower surface 23b that are parallel. That is, the filler plate 23 has a constant thickness at each horizontal position. The lower space 16A is provided continuously around the entire circumference below the outer edge of the lower mounting plate 13. The lower space 16A is a space formed by the lower surface 13b of the outer edge of the lower mounting plate 13, the outer end surface 23c of the filler plate 23, and the upper surface 21a of the anchor plate 21A. The lower space 16A has a constant vertical height. The lower space 16A is a space formed because the outer diameter of the filler plate 23 is smaller than the outer diameter of the lower mounting plate 13. The lower space 16A has a vertical gap S between the lower surface 13b of the lower mounting plate 13 and the upper surface 21a of the anchor plate 21A. The gap S is the thickness of the filler plate 23.

[0047] The operation of the seismic isolation device 10 is almost the same as in the first embodiment, so a detailed explanation will be omitted.

[0048] [Third Embodiment] Figure 5 is a longitudinal cross-sectional view showing the mounting structure of the seismic isolation device of the third embodiment. Note that components having the same function as those in the first embodiment described above are denoted by the same reference numerals, and detailed descriptions are omitted.

[0049] As shown in Figure 5, the mounting structure of the seismic isolation device in the third embodiment is the same as in the first embodiment, in which a space 16B is provided at a position where the outer edges of the lower mounting plate 13 of the seismic isolation device 10 are facing each other on the lower structure 111, with the lower mounting plate 13 of the seismic isolation device 10 attached to the lower structure 111. Here, the laminated rubber 11, the upper mounting plate 12, and the lower mounting plate 13 are the same as in the first embodiment, and their explanation is omitted.

[0050] The lower mounting plate 13 has its lower surface 13b in close contact with the upper surface 112 of the lower structure 111 and is fastened with lower bolts 15.

[0051] The lower space 16B is provided at a position opposite the lower surface 13b of the outer edge of the lower mounting plate 13. The lower structure 111 has a recess 114 formed on its upper surface 112 that is recessed vertically downward. The recess 114 has a ring shape centered on the vertical axis O (see Figure 1). The recess 114 has an inner diameter smaller than the outer diameter of the lower mounting plate 13 and an outer diameter larger than the outer diameter of the lower mounting plate 13. The recess 114 has a bottom surface 114a that faces the lower surface 13b of the lower mounting plate 13. The bottom surface 114a is a flat surface along the radial and circumferential directions of the lower mounting plate 13. The lower space 16B is provided continuously around the entire circumference below the outer edge of the lower mounting plate 13. The lower space 16B is the space provided between the lower surface 13b of the lower mounting plate 13 and the bottom surface 114a of the recess 114. The lower space 16B has a constant vertical height. The lower space 16B has a vertical gap S between the lower surface 13b of the lower mounting plate 13 and the bottom surface 114a of the recess 114.

[0052] The operation of the seismic isolation device 10 is almost the same as in the first embodiment, so a detailed explanation will be omitted.

[0053] [Effects of this embodiment] The mounting structure of the seismic isolation device of this embodiment comprises a seismic isolation device 10 having laminated rubber (seismic isolation laminated rubber) 11 and mounting plates 12 and 13 provided at the ends of the laminated rubber 11 and attached to structures (support members) 101 and 111. When the mounting plates 12 and 13 are attached to the structures 101 and 111, spaces 16, 16A, and 16B are provided on the structures 101 and 111 at positions where the outer edges of the mounting plates 12 and 13 face each other.

[0054] According to the mounting structure of the seismic isolation device of this embodiment, when tensile stress acts on the seismic isolation device 10 and, for example, the lower mounting plate 13 deforms, the lower mounting plate 13 rotates with the intersection point P between the lower surface 13b of the lower mounting plate 13 and the lower structure 111 side as the pivot point. At this time, since spaces 16, 16A, and 16B are provided on the lower structure 111 side, contact of the outer edge with the upper surface on the lower structure 111 side is suppressed. As a result, the outer edge of the lower mounting plate 13 does not act as the fulcrum of a lever, deformation of the outer edge is suppressed, and the stress acting on the lower bolt 15 can be reduced.

[0055] In this embodiment, the mounting structure of the seismic isolation device has mounting plates 12 and 13 with multiple mounting holes 31 spaced apart in the circumferential direction, and multiple bolts 14 and 15 are inserted through the mounting holes 31 and fastened to the structures 101 and 111, with spaces 16, 16A and 16B provided on the outer edge side of the bolts 14 and 15. Therefore, contact between the outer edges of the mounting plates 12 and 13 and the upper surface on the lower structure 111 side can be effectively suppressed.

[0056] The mounting structure of the seismic isolation device in this embodiment includes an upper mounting plate 12 provided on the upper part of the laminated rubber 11 and attached to the superstructure 101, and a lower mounting plate 13 provided on the lower part of the laminated rubber 11 and attached to the lower structure 111. The superstructure 101 to which the upper mounting plate 12 is attached and the lower structure 111 to which the lower mounting plate 13 is attached are provided, and spaces 16, 16A, and 16B are provided in at least one of the superstructure 101 and the lower structure 111. As a result, deformation of the outer edge on at least one side of the upper mounting plate 12 and the lower mounting plate 13 is suppressed, and the stress acting on the bolts 14 and 15 can be reduced.

[0057] The mounting structure of the seismic isolation device in this embodiment has an upper space provided in the upper mounting plate 12 and lower spaces 16, 16A, and 16B provided in the lower mounting plate 13. Therefore, the seismic isolation device 10 can reduce the stress acting on the bolts 14 and 15 on both the upper mounting plate 12 side and the lower mounting plate 13 side.

[0058] In this embodiment, the mounting structure of the seismic isolation device has spaces 16, 16A, and 16B continuously provided around the entire circumference of the mounting plates 12 and 13. Therefore, the stress acting on the bolts 14 and 15 can be reduced regardless of the direction of the load acting on the seismic isolation device 10.

[0059] In this embodiment, the mounting structure of the seismic isolation device is such that an anchor plate (foundation plate) 21 or an anchor plate 21 and a filler plate (foundation plate) 23 are fixed to the lower structure (foundation slab) 111, and the lower mounting plate 13 is attached to the lower structure 111 in contact with the anchor plate 21 or filler plate 23, and the lower spaces 16, 16A are provided on the outer edge side of the anchor plate 21 or filler plate 23. Therefore, the lower spaces 16, 16A can be easily formed simply by changing the shape of the anchor plate 21 or filler plate 23.

[0060] The mounting structure of the seismic isolation device in this embodiment is a recess 114 provided on the upper surface (mounting surface) 112 of the lower structure 111, where the space 16B is located, facing the outer edge of the lower mounting plate 13. Therefore, the lower spaces 16 and 16A can be easily formed simply by changing the shape of the lower structure 111.

[0061] In this embodiment, the mounting structure of the seismic isolation device has flexible members 17 that can deform in accordance with the deformation of the mounting plate 13 placed in the spaces 16, 16A, and 16B. Therefore, the spaces 16, 16A, and 16B can be filled with the flexible members 17 without hindering the deformation of the mounting plate 13, and the intrusion of foreign matter into the spaces 16, 16A, and 16B can be prevented.

[0062] In the embodiment described above, an upper space was provided in the superstructure 101 and lower spaces 16, 16A, and 16B were provided in the lower structure 111. However, it is sufficient if these spaces are provided in at least one of the superstructure 101 and the lower structure 111. For example, it is desirable to apply them to the structure with the lower strength between the superstructure 101 and the lower structure 111. [Explanation of Symbols]

[0063] 10 Seismic isolation devices 11. Laminated rubber (laminated rubber for seismic isolation) 12. Upper mounting plate (mounting plate) 13. Lower mounting plate (mounting plate) 14 Upper bolt 15 Lower bolt 16,16A,16B Lower space (space) 20, 21, 21A Anchor plate (foundation plate) 21a Top side 21b Bottom side 21c Outer end surface 22 Through hole 23. Filler plate (base plate) 23a Top surface (mounting surface) 23b Bottom surface 23c Outer end surface 31 mounting holes 41 Cap nuts 101 Superstructure (support members) 102 Bottom surface 111 Substructure (support members) 112 Top surface 113,114 recess

Claims

1. Laminated rubber for seismic isolation, A mounting plate provided at the end of the seismic isolation laminated rubber and attached to the support member, Equipped with a seismic isolation device, With the mounting plate attached to the support member, a space is provided in the support member at a position where the outer edges of the mounting plate face each other. The mounting plate has a contact surface that contacts the mounting surface of the support member, and a plurality of mounting holes are provided that are spaced apart in the circumferential direction and penetrate the contact surface, and a plurality of bolts are inserted through the plurality of mounting holes and fastened to the support member, and the space is provided on the outer edge side of the mounting plate from the bolts. Mounting structure for seismic isolation devices.

2. The mounting plate comprises an upper mounting plate provided on the upper part of the seismic isolation laminated rubber and a lower mounting plate provided on the lower part of the seismic isolation laminated rubber. The support member comprises an upper support member to which the upper mounting plate is attached, and a lower support member to which the lower mounting plate is attached. The aforementioned space is provided in at least one of the upper support member and the lower support member. Mounting structure for seismic isolation device according to claim 1.

3. The space comprises an upper space provided in the upper mounting plate and a lower space provided in the lower mounting plate. Mounting structure for seismic isolation device according to claim 2.

4. The aforementioned space is provided continuously around the entire circumference of the mounting plate. Mounting structure for seismic isolation device according to claim 1.

5. The support member comprises a base plate and a base plate fixed to the base plate, the mounting plate is attached to the base plate in contact with the base plate, and the space is provided on the outer edge side of the base plate. Mounting structure for seismic isolation device according to claim 1.

6. The space is a recess provided on the mounting surface of the support member facing the outer edge of the mounting plate. Mounting structure for seismic isolation device according to claim 1.

7. The aforementioned space is provided with a flexible member that can deform in accordance with the deformation of the mounting plate. Mounting structure for seismic isolation device according to claim 1.

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