JP2013163930A - Joint member for rubber laminate, and rubber laminate and structure using the joint member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint member which bears a tensile load even when a cylindrical rubber is fractured, eliminating the need for separately having a fail-safe device.SOLUTION: A joint member to be inserted in a fixing bolt hole formed in a flange plate includes an inner peripheral surface-side cylindrical steel member 1a, an outer peripheral surface-side cylindrical steel member 1e, an intermediate cylindrical steel member 1c, and cylindrical rubbers 1b and 1d each inserted between the cylindrical steel members 1a, 1c, and 1e. The neighboring cylindrical steel members and the cylindrical rubbers are bonded to each other. An outer peripheral surface 1aO of the inner peripheral surface-side cylindrical steel member 1a, an inner peripheral surface 1cI and an outer peripheral surface 1cO of the intermediate cylindrical steel member 1c, and an inner peripheral surface 1eI of the outer peripheral surface-side cylindrical steel member 1e each have an inverted truncated cone shape. The dimensional relations of the outer peripheral surface and the inner peripheral surface of the cylindrical steel members 1a, 1c, and 1e are set to the following: D1>D3 and D2>D4, where D1 represents the upper diameter of the outer peripheral surface 1cO of the intermediate cylindrical steel member 1c, D3 represents the lower diameter of the inner peripheral surface 1eI of the outer peripheral surface-side cylindrical steel member 1e, D2 represents the upper diameter of the outer peripheral surface 1aO of the inner peripheral surface-side cylindrical steel member 1a, and D4 represents the lower diameter of the inner peripheral surface 1cI of the intermediate cylindrical steel member 1c.

Description

  The present invention relates to a joining member used for a laminated rubber body used for a seismic isolation structure in a building structure, and a laminated rubber body and a structure using the joining member.

  Laminated rubber bodies used for building structure and civil engineering structure bearing mounting structure, in particular, seismic isolation structure in building structure, seismic isolation structure in civil engineering structure and horizontal force distribution structure, on the structure of the laminated rubber body, Although it has a large yield strength in the compression direction and can support the load of the superstructure, the yield strength in the tensile direction is inferior to that in the compression direction.

  Therefore, at the initial stage of development of a laminated rubber body as a seismic isolation device, a tensile force is not applied to the laminated rubber body, and the laminated rubber body and the upper part are The substructure was attached by connecting with dowel pins, and the designer was freed from studying the tensile force in the vertical direction.

  However, according to the dowel pin type bonding method, if the degree of separation of the dowel pin portion is increased during horizontal deformation, the dowel pin may come off and the laminated rubber body itself may be deformed. In such a state, the horizontal resistance force of the laminated rubber body is reduced, and there is a risk that the laminated rubber body starts to fall. Therefore, when the mounting structure using the dowel pins is adopted, the horizontal force is reduced. It was necessary to determine the use limit of the laminated rubber body with the amount of deformation as the fall limit (rollout displacement) (see Non-Patent Document 1, for example).

  For this reason, in order to connect the laminated rubber body and the upper and lower structures, generally, a fastening means using a mounting bolt that does not need to consider the above-mentioned fall limit has been widely used. The seismic isolation design of structures has been applied to high-rise buildings and building structures with a large aspect ratio. Accordingly, the development of laminated rubber bodies with high tensile capacity and the development of laminated rubber bodies In order to prevent the transmission of a tensile force greater than the yield strength in the vertical direction, a device has been devised to provide an anti-lifting device between the upper structure and the ground. In addition, various studies have been made on the method of binding the laminated rubber body and the upper and lower structures so as not to transmit a large tensile force to the laminated rubber body.

  However, the laminated rubber body mounting plate has a double structure, as in the laminated rubber seismic isolation device mounting structure described in Patent Document 1, or the laminated rubber body as in the laminated rubber bearing body described in Patent Document 2. In order to reduce the bending rigidity of the flange member of the body, the means for reducing the tensile force applied to the laminated rubber body by processing the flange is accompanied by a design change of the structural body of the laminated rubber body, which is costly and time consuming. In addition, it was necessary to review the installation space, and it was not easy to apply.

  On the other hand, the technique of interposing a cushioning material in the attachment part of the laminated rubber body, such as the fastening method of the seismic isolation isolator described in Patent Document 3 and the pull-out support mechanism of the seismic isolation device described in Patent Document 4, In the rust prevention of the contact part and the part that causes elastic deformation and the simple cylindrical form utilizing the compression characteristics of the rubber material, the rubber material bulges in the cylindrical inner diameter direction at the time of compression, causing a buffer with the mounting bolt, There is a possibility that the cushioning material made of the cylindrical rubber washer may be damaged.

  Therefore, in this patent application, as shown in FIG. 7, this application describes a laminated rubber body 37 interposed between an upper structure 38 and a lower structure 39 of a structure 43 as an upper structure 38 and a lower structure 39. The laminated rubber body joining members 31A and 31B (31) for joining while allowing the lower structure 39 and the laminated rubber body 37 to float are proposed.

  As shown in FIG. 8, this laminated rubber body joining member (hereinafter abbreviated as “joining member” as appropriate) 31 is formed as a sheared cylindrical rubber body, and includes an inner peripheral surface side cylindrical steel material 31 a, a flange An outer peripheral surface side cylindrical steel material 31e having a portion 31e ', an intermediate cylindrical steel material 31c, and cylindrical rubbers 31b, 31d respectively interposed between the cylindrical steel materials 31a, 31c, 31e, The adjacent cylindrical steel materials 31a, 31c, 31e and the cylindrical rubbers 31b, 31d are firmly bonded to each other by vulcanization bonding or the like, and the joining member 31 is formed in a laminated rubber shape that is concentric in a sectional view.

  As shown in FIG. 7, the joining member 31 is interposed between each of the plurality of mounting bolts 32A of the laminated rubber body 37 between the lower flange plate 33A and the lower anchor plate 34A, and the upper flange plate. Between the 33B and the upper anchor plate 34B, each of the plurality of mounting bolts 32B of the laminated rubber body 37 is interposed in the same manner as described above.

  When the joining member 31 having the above-described structure is lifted due to locking or the like in the upper structure 38 of the structure 43 during an earthquake or the like, and a tensile force acts on the attachment portion of the laminated rubber body 37 in the vertical direction, Specifically, as shown in FIG. 8, even if vertical lifting occurs between the flange plate 33 of the laminated rubber body 37 and the anchor plates 34 fixed to the upper and lower structures 38 and 39, The inner peripheral surface side cylindrical steel material 31 a of the joining member 31 formed in a rubber shape is fixed to the anchor plate 34, and the flange portion 31 e ′ of the outer peripheral surface side cylindrical steel material 31 e is formed on the upper surface of the flange plate 33. Since they are joined, the joining member 31 can cause shear deformation in the vertical direction, absorbs the upward floating of the laminated rubber body 37, and is large in the elastic layer, the adhesive layer and the like of the laminated rubber body 37. To prevent the tension occurs, it is possible to prevent damage or breakage of the laminated rubber body 37.

  For this reason, in the case of a base-isolated building structure with a large aspect ratio, the amount of lift can be absorbed without changing the shape of the mounting portion of the large laminated rubber body. And providing a joining member capable of reducing the tensile force in the vertical direction with respect to the elastic layer or the adhesive layer of the laminated rubber body and preventing the laminated rubber body from being damaged or damaged, and the laminated rubber body provided with the joining member, and A structure supported by the laminated rubber body can be provided.

Japanese Patent Laid-Open No. 2005-163281 JP 2002-195327 A JP-A-10-110551 JP-A-11-153191 International Publication No. 2011-043242 Pamphlet

By James M. Kerry, translated by Japan Vibration Technology Association / directed by Takashi Fujita, “Basic theory of seismic isolation structure and laminated rubber”, Tokyo Denki University Press, p160-p162

  However, according to the laminated rubber body bonding member 31 described in Patent Document 5, the cylindrical rubbers 31b and 31d have a lower material strength than the cylindrical steel materials 31a, 31c and 31e, so that they can be used for a long time. When the strength reaches the limit due to the above, there is a risk of breaking at the cylindrical rubber 31b, 31d itself or at the bonded portion between the cylindrical rubber 31b, 31d and the cylindrical steel materials 31a, 31c, 31e, for example, as shown in FIG. In addition, if fracture occurs at the bonded portion of the cylindrical rubber 31b and the cylindrical steel material 31c, the joining of the flange plate 33 and the anchor plate 34 by the joining member 31 does not function, and the joining member 31 supports the tensile load of the laminated rubber body 37. Can not do. Therefore, it is necessary to provide a separate fail-safe device.

  Therefore, the present invention has been made in view of such a situation, and it is possible to support a tensile load even when a cylindrical rubber or the like is broken, and a joining member that does not require a separate fail-safe device is provided. An object of the present invention is to provide a laminated rubber body provided with the joining member and a structure supported by the laminated rubber body.

  In order to achieve the above object, the present invention provides a laminated rubber body formed by joining a flange plate to the lower end surface of a laminated rubber portion in which elastic layers and reinforcing plates made of a rubber material are alternately laminated. A laminated rubber body joining member that is joined to the lower structure while allowing the laminated rubber body to float, and is inserted into a mounting bolt hole drilled in the flange plate, and the outer peripheral surface side is An outer cylindrical steel material joined to the flange plate so as to follow the vertical separation of the flange plate, and the anchor plate side inserted into the mounting bolt hole and the inner peripheral surface side being fixed to the lower structure Are arranged between an inner cylindrical steel material fixedly fixed via a mounting bolt, an inner peripheral surface of the outer cylindrical steel material and an outer peripheral surface of the inner cylindrical steel material, and the outer cylindrical steel material Inner surface and A cylindrical rubber integrated with an outer peripheral surface of the inner cylindrical steel material, and an inner peripheral surface of the outer cylindrical steel material is formed in an inverted truncated cone shape having an upper diameter larger than a lower diameter, The outer peripheral surface of the tubular steel material has an inverted truncated cone shape, and the upper diameter of the outer peripheral surface is formed larger than the lower diameter of the inner peripheral surface of the outer cylindrical steel material.

  And according to the present invention, the inner peripheral surface of the outer cylindrical steel material is formed in an inverted truncated cone shape whose upper diameter is larger than the lower diameter, and the outer peripheral surface of the inner cylindrical steel material is in an inverted truncated cone shape, In addition, since the upper diameter of the outer peripheral surface is larger than the lower diameter of the inner peripheral surface of the outer cylindrical steel material, the outer peripheral surface of the inner cylindrical steel material can be Even if the cylindrical rubber is ruptured, the tensile load can be supported by the laminated rubber body joining member, and there is no need to provide a separate fail-safe device.

  Moreover, since the joining member for laminated rubber bodies according to the present invention forms the inner peripheral surface of the outer cylindrical steel material and the outer peripheral surface of the inner cylindrical steel material in an inverted truncated cone shape, the self-aligning function is exhibited. And the installation position of the laminated rubber can be stably maintained.

  Further, when the laminated rubber body joining member deforms in the horizontal direction and supports the tensile load of the laminated rubber body, the joining member has non-linearity in the rigidity in the vertical direction. It can be expected that a force that cancels the rotational moment is generated.

  The joining member for a laminated rubber body is formed by connecting the cylindrical rubber between the outer cylindrical steel material side portion and the inner cylindrical steel material between an inner peripheral surface of the outer cylindrical steel material and an outer peripheral surface of the inner cylindrical steel material. At least one cylindrical steel material that is arranged so as to be divided into side portions and integrated with the divided cylindrical rubber, and whose outer peripheral surface and inner peripheral surface are both formed in an inverted truncated cone shape. And the upper diameter of the outer peripheral surface of the at least one cylindrical steel material can be formed larger than the lower diameter of the inner peripheral surface of the adjacent outer cylindrical steel material. Thereby, like the said invention, while being able to support a tensile load, it becomes possible to maintain the installation position of laminated rubber stably, etc.

  The present invention also provides a laminated rubber body formed by joining a flange plate to the upper end surface of a laminated rubber portion in which elastic layers and reinforcing plates made of a rubber material are alternately laminated, with the upper structure interposed therebetween. A laminated rubber body joining member that is joined to a body while allowing the laminated rubber body to float, and is inserted into a mounting bolt hole drilled in the flange plate, the outer peripheral surface side being a vertical direction of the flange plate An outer cylindrical steel member joined to the flange plate so as to follow the separation of the flange plate, an installation bolt on the anchor plate side inserted into the mounting bolt hole and the inner peripheral surface side being fixed to the upper structure Between the inner cylindrical steel material fixedly fixed via the inner cylindrical surface of the outer cylindrical steel material and the outer peripheral surface of the inner cylindrical steel material. Outside the inner tubular steel A cylindrical rubber integrated with the surface, the inner peripheral surface of the outer cylindrical steel material is formed in a truncated cone shape whose lower diameter is larger than the upper diameter, and the outer peripheral surface of the inner cylindrical steel material is In addition, the shape is a truncated cone, and the lower diameter of the outer peripheral surface is formed larger than the upper diameter of the inner peripheral surface of the outer cylindrical steel material.

  According to the present invention, the inner peripheral surface of the outer cylindrical steel material is formed in a truncated cone shape whose lower diameter is larger than the upper diameter, and the outer peripheral surface of the inner cylindrical steel material is in a truncated cone shape, and the Since the lower diameter of the outer peripheral surface is formed to be larger than the upper diameter of the inner peripheral surface of the outer cylindrical steel material, the outer peripheral surface of the inner cylindrical steel material can be used as the inner peripheral surface of the outer cylindrical steel material even when the cylindrical rubber breaks. Even if the cylindrical rubber is broken, the tensile load can be supported by the laminated rubber body joining member, and there is no need to provide a separate fail-safe device. In addition, since the inner peripheral surface of the outer cylindrical steel material and the outer peripheral surface of the inner cylindrical steel material are formed in a truncated cone shape, the self-alignment function can be exhibited and the installation position of the laminated rubber can be maintained stably. can do. Further, when the laminated rubber body joining member deforms in the horizontal direction and supports the tensile load of the laminated rubber body, the joining member has non-linearity in the rigidity in the vertical direction. It can be expected that a force that cancels the rotational moment is generated.

  The joining member for a laminated rubber body is formed by connecting the cylindrical rubber between the outer cylindrical steel material side portion and the inner cylindrical steel material between an inner peripheral surface of the outer cylindrical steel material and an outer peripheral surface of the inner cylindrical steel material. It is arranged so as to be divided into side portions and integrated with the divided cylindrical rubber, and includes at least one cylindrical steel material in which both the outer peripheral surface and the inner peripheral surface are formed in a truncated cone shape. The lower diameter of the outer peripheral surface of the at least one tubular steel material can be formed larger than the upper diameter of the inner peripheral surface of the adjacent outer cylindrical steel material. Thereby, like the said invention, while being able to support a tensile load, it becomes possible to maintain the installation position of laminated rubber stably, etc.

  In addition, the present invention is a laminated rubber body and a structure, and is characterized by including any one of the above-mentioned laminated rubber body joining members. Thereby, as mentioned above, it is not necessary to provide a separate fail-safe device, and the safety of the laminated rubber body and the structure can be improved at low cost.

  As described above, according to the present invention, it is possible to provide a joining member that does not require a separate fail-safe device, and to provide a laminated rubber body provided with the joining member and a structure supported by the laminated rubber body. Can be provided.

It is sectional drawing which shows the attachment state of one Embodiment of the joining member for laminated rubber bodies concerning this invention. It is a figure which shows the joining member of FIG. 1, Comprising: (a) is a top view, (b) is the sectional view on the AA line of (a). It is a partially broken sectional view of the laminated rubber body and the structure to which the joining member of FIG. 1 is attached, and shows a state before relative deformation in the horizontal direction occurs between the upper structure and the lower structure. FIG. 2 is a partially cutaway cross-sectional view of a laminated rubber body and a structure to which the joining member of FIG. 1 is attached, showing a state after relative deformation in the horizontal direction has occurred between the upper structure and the lower structure. It is an enlarged view which shows the joining member in FIG. 4, and its vicinity. It is sectional drawing which shows the state which the cylindrical rubber of the joining member of FIG. 1 fractured | ruptured. It is a partially broken sectional view of a laminated rubber body and a structure to which a conventional laminated rubber body joining member is attached. It is sectional drawing which shows the deformation | transformation state of the joining member at the time of the floating of the laminated rubber body of FIG. It is sectional drawing which shows the state which the cylindrical rubber of the joining member for laminated rubber bodies of FIG. 7 fractured | ruptured.

  Next, an embodiment for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 to FIG. 3 show an embodiment of a laminated rubber body joining member according to the present invention. The joining member 1 includes an upper structure 8 and a lower structure of a structure 13 as shown in FIG. 9, the laminated rubber body 7 interposed between the upper structure 8 and the lower structure 9 and the laminated rubber body 7 are joined to each other while allowing the floating.

  The laminated rubber body 7 is formed by joining the flange plates 3 (3A, 3B) to the upper and lower end surfaces of the laminated rubber portion 6 in which the rubber layers 6a and the reinforcing plates 6b are alternately laminated, and the rubber layer 6a and the reinforcing plate. The contact surfaces of 6b and the rubber layer 6a and the flange plate 3 are integrally formed by vulcanization adhesion. A cylindrical lead plug 6c is enclosed in the through hole of the laminated rubber portion 6, and is sealed with two cap plates 6d.

  The upper anchor plate 4B is fixed to the lower surface of the upper structure 8 via a headed stud 11B, and the lower anchor plate 4A is fixed to the upper surface of the lower structure 9 via a headed stud 11A. The joining member 1 (1A, 1B) is attached to the extending portion of the flange plate 3 of the rubber body 7.

  As shown in FIGS. 1 and 2, the joining member 1 is formed as a shear-shaped cylindrical rubber body, and includes an inner peripheral surface side tubular steel material 1a having an insertion hole 1a ′, a flange portion 1e ′, and a female screw portion 1f. An outer peripheral surface side cylindrical steel material 1e, an intermediate cylindrical steel material 1c, and cylindrical rubbers 1b, 1d interposed between these cylindrical steel materials 1a, 1c, 1e, respectively, are adjacent to each other. The steel material and the cylindrical rubber are firmly bonded to each other by an adhesive, and preferably vulcanized bonding used for the laminated rubber portion 6 or the like. As a result, the joining member 1 is formed in a laminated rubber shape that is concentric in a sectional view.

The outer peripheral surface 1aO of the inner peripheral surface side tubular steel material 1a, the inner peripheral surface 1cI and outer peripheral surface 1cO of the intermediate cylindrical steel material 1c, and the inner peripheral surface 1eI of the outer peripheral surface side cylindrical steel material 1e are each formed in an inverted truncated cone shape. And the dimensional relationship of the outer peripheral surface and inner peripheral surface of each cylindrical steel material 1a, 1c, 1e is set as follows.
Upper diameter D1 of outer peripheral surface 1cO of intermediate tubular steel material 1c> lower diameter D3 of inner peripheral surface 1eI of outer peripheral surface side tubular steel material 1e
Upper diameter D2 of outer peripheral surface 1aO of inner peripheral surface side tubular steel material 1a> lower diameter D4 of inner peripheral surface 1cI of intermediate cylindrical steel material 1c

  The cylindrical steel materials 1a, 1c and 1e are obtained from a joining member made of sheared tubular rubber instead of a material made of steel, and have a shear deformation function in the tubular axial direction and from the direction of the tubular outer peripheral surface. A non-ferrous metal material such as synthetic resin or aluminum can be used as long as it does not interfere with the compression deformation function.

  The outer peripheral surface and the inner peripheral surface of each of the cylindrical rubbers 1b and 1d are also formed in an inverted truncated cone shape like the cylindrical steel materials 1a, 1c and 1e, and the rubber material used for the cylindrical rubbers 1b and 1d. In addition to excellent mechanical properties, their aging is small, and materials with favorable environmental properties such as water resistance and ozone resistance are also good, whether natural rubber or synthetic rubber, A rubber material in which natural rubber and synthetic rubber are mixed may be used.

  The mounting bolt 2 is a hexagon socket head cap bolt, and a hexagon socket 2c is formed in the head (enlarged portion) 2a and has a male screw portion 2b. The cap nut 5 has a large diameter portion 5a and a small diameter portion 5b, and has a female screw portion 5c that opens on the upper surface of the small diameter portion 5b.

  When attaching the joining member 1, as shown in FIG. 1, the small diameter portion 5 b of the cap nut 5 is accommodated in the through hole 4 a of the anchor plate 4, and the joining member 1 is accommodated in the through hole 3 a of the flange plate 3. The flange portion 1e ′ of the cylindrical steel material 1e on the outer peripheral surface side of the member 1 is brought into contact with the upper surface of the flange plate 3, the flange plate 3 and the anchor plate 4 are overlapped, and the mounting bolt 2 is inserted into the insertion hole 1a ′ of the joining member 1. Then, the male screw portion 2b of the mounting bolt 2 and the female screw portion 5c of the cap nut 5 are screwed together. Thereby, the inner peripheral surface side tubular steel material 1a of the joining member 1 is firmly sandwiched between the enormous portion 2a of the mounting bolt 2 and the small diameter portion 5b of the cap nut 5, and is fixedly fixed to the anchor plate 4. On the other hand, the flange portion 1e 'of the outer peripheral surface side tubular steel material 1e of the joining member 1 is fixed to the upper surface of the flange plate 3 by a female screw (not shown) screwed into the female screw portion 1f.

  As shown in FIG. 3, the joining member 1 is interposed between each of the plurality of mounting bolts 2A of the laminated rubber body 7 between the lower flange plate 3A and the lower anchor plate 4A, and the upper flange plate. Between 3B and the upper anchor plate 4B, each of the plurality of mounting bolts 2B of the laminated rubber body 7 is interposed in the same manner as described above.

  Next, the operation of the joining member 1 having the above configuration will be described with reference to FIGS. 3 to 5.

  In the event of an earthquake or the like, when the upper structure 8 of the structure 13 is lifted by rocking or the like and a tensile force acts on the mounting portion of the laminated rubber body 7 in a vertical direction, specifically, as shown in FIG. Further, even if the vertical rise between the flange plate 3 of the laminated rubber body 7 and the anchor plate 4 fixed to the lower structure 9 occurs, the laminated rubber body 7 is formed in the laminated rubber shape as shown in FIG. Since the inner peripheral surface side tubular steel material 1a of the joining member 1 is fixed to the anchor plate 4 and the flange portion 1e ′ of the outer peripheral surface side tubular steel material 1e is bonded to the upper surface of the flange plate 3, The joining member 1 can cause shear deformation in the vertical direction, absorbs the upward floating of the laminated rubber body 7, and prevents a large tensile force from being generated in the elastic layer, the adhesive layer and the like of the laminated rubber body 7. Preventing damage and breakage of the laminated rubber body 7 Can.

  Further, by using the joining member 1 having a cylindrical laminated rubber structure having a concentric circular shape in cross section, the flange plate 3 can be easily deformed in the lifting direction, in other words, the shearing direction of the joining member 1. Deformation (so-called compression deformation) from the outer peripheral surface of the concentrically laminated members that are orthogonal to each other in the direction of the central axis (so-called compression deformation), in other words, transmission of the horizontal force of the laminated rubber body 7 that supports the structure 13 However, it can be used without any special consideration in comparison with the state of force transmission by a conventional mounting bolt.

  Further, by arranging the joining member 1 made of sheared cylindrical rubber on each of the mounting bolts of the laminated rubber body 7, the horizontal force acting on the laminated rubber body 7 causes the concentric cylindrical lamination of the joining member 1. Slight deformation that occurs when acting from the outer peripheral surface of the rubber toward the center can prevent concentration on a specific mounting bolt, and can also avoid individual destruction that may occur with conventional mounting bolts. .

  Further, the floating of the flange plate 3 is caused by a fall phenomenon (rollout phenomenon) accompanying horizontal shear deformation of the laminated rubber body 7 disposed between the upper structure 8 and the lower structure 9, and the upper structure. 8, even when it is not perpendicular to the axis of the mounting bolt 2 but at an angle with the axis, bending deformation occurs in the cylindrical rubbers 1 b and 1 d of the joining member 1, and the flange plate 3 is lifted. There will be no sag or friction that would be a great resistance.

  Further, in the rising phenomenon of the end portion of the laminated rubber body 7 due to a bending moment generated when a large horizontal shear deformation occurs in the laminated rubber body 7, the vertical excess of the rubber material and the adhesive layer in the range where the lifting occurs is caused. As a result of reducing the tensile force, the soundness of the laminated rubber body 7 can be secured, and a significant increase in the horizontal force due to the hardening phenomenon that appears when the laminated rubber body 7 undergoes a large horizontal shear deformation can be suppressed. Therefore, it is possible to prevent the seismic isolation cycle from being shortened under a large horizontal shear deformation, to obtain a long cycle in a wide range, and to secure safety during a large earthquake.

  In addition, when the strength of the joining member 1 reaches a limit due to long-term use or the like, the tubular rubbers 1b and 1d themselves or the tubular rubbers 1b and 1d and the tubular steel materials 1a, 1c, and 1e are fractured. For example, even if the tubular rubber 1b itself or the tubular rubber 1b and the tubular steel material 1a or 1e are broken at the bonded portion, as shown in FIG. Since the upper diameter D2 of the outer peripheral surface 1aO is larger than the lower diameter D4 of the inner peripheral surface 1cI of the cylindrical steel material 1c, the cylindrical steel materials 1a and 1c are not separated from each other as shown in FIG. The joining of the flange plate 3 and the anchor plate 4 is maintained, and the joining member 1 can continue to support the tensile load of the laminated rubber body 7. Therefore, it is not necessary to provide a separate fail safe device.

  Even when the tubular rubber 1d itself or the tubular rubber 1d and the tubular steel material 1c or 1e are fractured, as shown in FIG. 2 (b), the upper diameter of the outer peripheral surface 1cO of the tubular steel material 1c. Since D1 is larger than the lower diameter D3 of the inner peripheral surface 1eI of the cylindrical steel material 1e, the joining of the flange plate 3 and the anchor plate 4 by the joining member 1 is maintained, and the tensile load of the laminated rubber body 7 is continuously supported. can do. About this point, it functions similarly about the joining member 1B distribute | arranged between the flange plate 3B by the side of the upper structure 8, and the anchor plate 4B.

  Moreover, since the outer peripheral surface and inner peripheral surface of the cylindrical steel materials 1a, 1c, and 1e of the joining member 1 are formed in an inverted truncated cone shape or a truncated cone shape, a self-aligning function can be exhibited, The installation position of the rubber body 7 can be stably maintained.

  Furthermore, when supporting the tensile load of the laminated rubber body 7 while the joining member 1 is deformed in the horizontal direction, the joining member 1 has nonlinearity in the rigidity in the vertical direction. It can be expected that the power to counteract will be generated.

  In the above embodiment, the flange portion 1e ′ of the outer circumferential surface side tubular steel material 1e of the joining member 1 is joined to the upper surface of the flange plate 3, but the outer circumferential surface side tubular shape is not provided with the flange portion 1e ′. The outer peripheral surface of the steel material 1e and the inner peripheral surface of the through hole 3a of the flange plate 3 can be fitted together, and the outer peripheral surface side tubular steel material 1e can be fixed to the flange plate 3. Further, after the upper flange plate 3B is lifted, in order to prevent the flange 1e ′ of the outer peripheral surface side tubular steel material 1e from being restored to the initial position due to disconnection of the joining member 1 when lowered, the flange portion 1e ′ is The flange plate 3 may be mechanically fixed with a fixing screw or the like.

  Moreover, in the said embodiment, although the joining member 1 was comprised by three cylindrical steel materials 1a, 1c, and 1e, it can also be comprised by three or four or more cylindrical steel materials.

1 (1A, 1B) Laminated rubber body joining member 1a Inner circumferential surface side tubular steel 1aO Outer circumferential surface 1a 'Insertion hole 1b Cylindrical rubber 1c Intermediate tubular steel 1cI Inner circumferential surface 1cO Outer circumferential surface 1d Cylindrical rubber 1e Outer circumferential surface Side tubular steel 1eI Inner peripheral surface 1e 'Flange 1f Female thread 2 (2A, 2B) Mounting bolt (Hexagon socket head cap screw)
2a Head 2b Male thread 2c Hexagonal hole 3 (3A, 3B) Flange plate 3a Through hole 4 (4A, 4B) Anchor plate 4a Through hole 5 (5A, 5B) Cap nut 5a Large diameter part 5b Small diameter part 5c Female thread part 6 Laminated rubber portion 6a Rubber layer 6b Reinforcing plate 6c Lead plug 6d Cap plate 7 Laminated rubber body 8 Upper structure 9 Lower structure 11 (11A, 11B) Headed stud 13 Structure

Claims (6)

A laminated rubber body formed by joining a flange plate to a lower end surface of a laminated rubber portion in which elastic layers and reinforcing plates made of a rubber material are alternately laminated, and the laminated rubber body to the lower structure through the flange plate. A laminated rubber body joining member that joins while allowing the body to float,
An outer cylindrical steel material that is inserted into the mounting bolt hole drilled in the flange plate and joined to the flange plate so that the outer peripheral surface side follows the separation in the vertical direction of the flange plate;
An inner tubular steel material fixedly inserted via an attachment bolt to the anchor plate side that is inserted into the attachment bolt hole and the inner peripheral surface side is fixed to the lower structure,
A cylindrical shape that is arranged between the inner peripheral surface of the outer cylindrical steel material and the outer peripheral surface of the inner cylindrical steel material, and is integrated with the inner peripheral surface of the outer cylindrical steel material and the outer peripheral surface of the inner cylindrical steel material. With rubber,
An inner peripheral surface of the outer cylindrical steel material is formed in an inverted truncated cone shape whose upper diameter is larger than a lower diameter, and an outer peripheral surface of the inner cylindrical steel material is an inverted truncated cone shape, and A joining member for laminated rubber bodies, wherein an upper diameter is formed larger than a lower diameter of an inner peripheral surface of the outer cylindrical steel material. Between the inner peripheral surface of the outer cylindrical steel material and the outer peripheral surface of the inner cylindrical steel material, so as to divide the cylindrical rubber into the outer cylindrical steel material side portion and the inner cylindrical steel material side portion, And it is arranged to be integrated with the divided cylindrical rubber, and includes at least one cylindrical steel material in which both the outer peripheral surface and the inner peripheral surface are formed in an inverted truncated cone shape,
2. The laminated rubber according to claim 1, wherein an upper diameter of the outer peripheral surface of the at least one cylindrical steel material is larger than a lower diameter of an inner peripheral surface of the adjacent outer cylindrical steel material. Bonding member for body. A laminated rubber body formed by joining a flange plate to the upper end surface of a laminated rubber portion in which elastic layers and reinforcing plates made of a rubber material are alternately laminated, is formed on the upper structure body via the flange plate. A laminated rubber body joining member that joins while allowing the body to float,
An outer cylindrical steel material that is inserted into the mounting bolt hole drilled in the flange plate and joined to the flange plate so that the outer peripheral surface side follows the separation in the vertical direction of the flange plate;
An inner tubular steel material that is inserted into the mounting bolt hole and fixed to the anchor plate side, the inner peripheral surface side of which is fixed to the upper structure body, via a mounting bolt,
A cylindrical shape that is arranged between the inner peripheral surface of the outer cylindrical steel material and the outer peripheral surface of the inner cylindrical steel material, and is integrated with the inner peripheral surface of the outer cylindrical steel material and the outer peripheral surface of the inner cylindrical steel material. With rubber,
The inner peripheral surface of the outer cylindrical steel material is formed in a truncated cone shape whose lower diameter is larger than the upper diameter, and the outer peripheral surface of the inner cylindrical steel material is in a truncated cone shape and has a lower diameter on the outer peripheral surface. Is formed larger in diameter than the upper diameter of the inner peripheral surface of the outer cylindrical steel material. Between the inner peripheral surface of the outer cylindrical steel material and the outer peripheral surface of the inner cylindrical steel material, so as to divide the cylindrical rubber into the outer cylindrical steel material side portion and the inner cylindrical steel material side portion, And it is arranged to be integrated with the divided cylindrical rubber, and includes at least one cylindrical steel material in which both the outer peripheral surface and the inner peripheral surface are formed in a truncated cone shape,
4. The laminated rubber according to claim 3, wherein a lower diameter of the outer peripheral surface of the at least one cylindrical steel material is formed to be larger than an upper diameter of an inner peripheral surface of the adjacent outer cylindrical steel material. Bonding member for body.   A laminated rubber body comprising the joining member for laminated rubber bodies according to any one of claims 1 to 4.   A structure which is supported by the laminated rubber body according to claim 5.

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