JP5330463B2 - Elastic body restraint degree variable structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elastic body restraining degree variable structure capable of realizing vertical spring performance suitable for a wide input range from low load to high load in a bearing device for bearing a main structure such as building and bridge. <P>SOLUTION: An elastic body restraining degree variable structure comprises: an upper shoe 11; a lower shoe 12; an elastic body 13 disposed between the upper shoe 11 and the lower shoe 12; and elastic deformation restraining bodies 16 surrounding the elastic body 13 at positions with which side faces of the elastically deformed elastic body 13 are in close contact or contact. Protrusions 14 or recesses 15 are formed on the side faces of the elastic body 13. The elastic body 13 is surrounded by the upper shoe 11, the lower shoe 12, and the elastic deformation restraining bodies 16, and is brought into a substantially sealed state. The degree of this sealed state becomes higher with an increase of load to the elastic body 13. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

  The present invention relates to a variable elastic body constraint degree structure used for a bearing device that supports various structures such as buildings and bridges.

  2. Description of the Related Art A bearing device for a structure such as a building or a bridge includes a rubber bearing in which rubber plates and iron plates are alternately stacked and bonded together by vulcanization bonding (see Patent Document 1). In the rubber bearing, by constraining the displacement of the rubber, a device for improving the vertical spring rigidity and a device for improving the rotation follow-up performance are made. For example, in rubber bearings, rubber plates and iron plates are alternately laminated and vulcanized and bonded to reduce the fluidity of rubber and increase the rigidity of the vertical spring.

  Also, in the sealed rubber bearing, the rubber plate is placed in the metal pot that serves as the lower shell, and the piston-shaped upper flange is placed on the rubber plate so that the rubber plate behaves in an incompressible fluid. It is comprised so that rotation tracking performance may be acquired by being restrained (refer patent document 2). This sealed rubber bearing is handled as a metal bearing because it does not have vertical flexibility.

  Furthermore, in so-called compact bearings, in order to support a large vertical load, a concave portion is provided on each of the opposing surfaces of the upper and lower collars, and a rubber layer is disposed in each concave portion. Is prevented from bulging outward in the radial direction due to bending deformation, thereby improving the vertical spring rigidity (see Patent Document 3).

JP 2000-1820 A JP 2000-178922 A JP 2009-13773 A

  An object of the present invention is to provide an elastic body restraint degree variable structure capable of supporting a high load while expressing an appropriate vertical flexibility in accordance with a load from a load.

  Specifically, an object of the present invention is to provide an elastic body restraint degree variable structure capable of expressing a vertical spring performance suitable for a wide range of inputs from low load to high load.

  Another object of the present invention is to provide an elastic body restraint degree variable structure capable of realizing good rotation followability while increasing the surface pressure.

The elastic body constraint degree variable structure according to the present invention is used as a support device for supporting various structures such as buildings and bridges, and includes a first rigid body, a second rigid body, and the first rigid body. An elastic body disposed between the elastic body and the second rigid body, and an elastic deformation restraining body that surrounds the elastic body at a position where the elastic body that is elastically deformed approaches or contacts. In a state where a predetermined value or more is input, the elastic body has a convex portion and / or a concave portion on a side surface, and the elastic deformation restraining body is brought into contact with and / or pressed against the deformed elastic body. Constrain deformation. That is, when an input exceeding a predetermined value is made, the elastic body is elastically deformed so as to reduce the volume of the gap created by the convex portion and the concave portion, and the deformed elastic body hits the restraining body. The deformation of the elastic body is constrained by contact and / or pressure contact. For example, the elastic body is surrounded by the first rigid body, the second rigid body, and the elastic deformation restraining body to be in a substantially sealed state, and the higher the load on the elastic body, the more advanced the elastic body. It changes to a sealed state. In such an elastic body restraint variable structure, when a load is input, the elastic body deforms so as to fill the gap formed by the concave portions between the convex portions according to the magnitude of the input, The degree to which the portion comes into pressure contact with the restraining surface of the elastic deformation restraining body increases. The elastic deformation restraining body restrains such deformation of the elastic body.

  Here, the elastic body may be constituted by a laminated structure in which an elastic layer and a reinforcing plate are laminated, or may be constituted by a single elastic layer without including the reinforcing plate. When the elastic body has a laminated structure, the convex portion or the concave portion may be formed at one of the position of the reinforcing plate or the position between the reinforcing plates, and the concave portion or the convex portion may be formed at the other. When there is the reinforcing plate, the elastic body bulges between the reinforcing plates in a direction substantially orthogonal to the thickness direction of the elastic body when there is a load input. When the convex portion is provided at a position between the reinforcing plates, the elastic body is deformed too much because the elastically convex portion of the elastic body is first pressed against the restraining surface of the elastic deformation restraining body. Can be prevented. In particular, it is possible to prevent damage due to local distortion of the elastic peripheral surface corresponding to the space between the reinforcing plates.

  For example, the convex portion or the concave portion of the elastic body is formed continuously or intermittently in the circumferential direction of the side surface of the elastic body or the constraining surface of the elastic deformation restraining body, thereby effectively realizing the function. I can do it.

  A gap may be formed between the side surface of the elastic body and the restraining surface of the elastic deformation restraining body. That is, the present invention is configured such that at least when a large load is applied, the convex portion of the elastic body is in contact with the restraining surface of the elastic deformation restraining body. It should be noted that it is preferable that the restraining surface of the elastic deformation restraining body and the convex portion of the elastic body are in contact with each other when the support device is assembled. In this case, the position of the elastic body can be easily positioned in the elastic deformation restraint body during assembly.

  The elastic deformation restraint body may be provided integrally with the first rigid body, or may be provided integrally with the second rigid body.

  In the present invention, the elastic body is surrounded by the first rigid body, the second rigid body, and the elastic deformation restraining body, so that a substantially sealed space portion is formed, and a small bearing area such as a sealed rubber bearing is formed. Thus, while realizing a high load bearing, a vertical flexible displacement with respect to a vertical load can be realized by providing a clearance by providing a convex portion or a concave portion on the restraining surface of the elastic body or the elastic deformation restraining body. In addition, during the rotation action, the elastic body is deformed by the gaps between the convex portions or the concave portions, and good rotation followability can be realized.

  In addition, by providing convex portions or concave portions on the restraint surface of the elastic body or elastic deformation restraint body and providing a gap, the amount of vertical displacement increases as the vertical load increases. The inclination (constraint degree or spring constant) of the graph representing the magnitude of the vertical load reaction force with respect to the displacement increases as the vertical displacement or the vertical load increases. As described above, in the present invention, the vertical displacement is increased as the load is increased by setting the gap created by the concave portion and the convex portion provided between the restraint surface of the elastic deformation restraint body and the side surface of the elastic body. It is possible to support the superstructure with such a characteristic that the increase amount of is small, that is, the degree of restraint is variable. Further, the smaller the gap is, the narrower the range (primary gradient) of the slope of the graph representing the magnitude of the vertical load reaction force with respect to the vertical displacement can be set.

It is sectional drawing which shows the normal use condition of the support apparatus to which this invention is applied. It is a perspective view of the elastic body to which this invention is applied. It is a perspective view of the elastic body which provided the projection part in the side surface to which this invention is applied. It is a perspective view of the elastic body which provided the intermittent convex part in the side surface to which this invention is applied. FIG. 6 is a cross-sectional view of the support device before installation (before a load is applied) between the upper structure and the lower structure, and a gap between the convex portion of the elastic body side surface and the restraint surface of the elastic deformation restraint body is not present. Indicates the state of contact. FIG. 6 is a cross-sectional view of the support device before being installed between the upper structure and the lower structure (before a load is applied), and a gap between the convex portion of the elastic body side surface and the restraint surface of the elastic deformation restraint body is applied. The contact state is shown. It is a characteristic graph which shows the relationship between the amount of displacements of a perpendicular direction, and a vertical load. It is sectional drawing of the support apparatus using the laminated elastic body which provided the recessed part in the position of the reinforcement board. It is sectional drawing of the support apparatus using the laminated elastic body which provided the convex part in the position of the reinforcement board. (A)-(E) is sectional drawing which shows the modification of the reinforcement board of a laminated | stacked elastic body. It is sectional drawing of the support apparatus which the core material penetrated the upper collar. FIG. 12 is a cross-sectional view of a support device that is a modification of FIG. 11 and has an elastic deformation restraint fixed to a lower arm. It is sectional drawing which shows the modification of the support apparatus which is not penetrated in any of upper / lower cores. It is sectional drawing of the support apparatus which made FIG. 13 more concrete. It is sectional drawing of the support apparatus which provided the convex part or the recessed part in the restraint surface of an elastic deformation | transformation restraint body, and shows the example which provided the recessed part in the position of the reinforcement board. It is sectional drawing of the support apparatus which provided the convex part or the recessed part in the restraint surface of an elastic deformation | transformation restraint body, and shows the example which provided the convex part in the position of the reinforcement board.

  Hereinafter, a bearing device to which an elastic body constraint degree variable structure according to the present invention is applied will be described with reference to the drawings. Hereinafter, the support device will be described in the following order.

1. 1. Explanation of bearing device 2. Description of elastic body and elastic deformation restraint body 3. Explanation of operation of bearing device 4. Explanation of laminated elastic body 5. Description of modification of reinforcing plate Modification 1 of bearing device
7). Modification 2 of bearing device
8). Modification 3 of bearing device
9. Modification 4 of bearing device
10. Other variations

[1. Description of bearing device]
As shown in FIG. 1, a bearing device 10 is mounted between an upper structure 1 such as a bridge girder and a lower structure 2 such as a bridge pier or an abutment to support various loads such as a horizontal load, a vertical load, and a rotational load. At the same time, it is a bridge support device that supports and absorbs and disperses vibrations, vibrations and stresses caused by earthquakes, winds, dynamic or static traffic loads, and the like. In the support device 10, an elastic body 13 serving as a support body is interposed between an upper collar 11 serving as a first rigid body and a lower collar 12 serving as a second rigid body. The elastic body 13 is surrounded by an elastic deformation restraining body 16 fixed to the upper collar 11 or the lower collar 12 (here, the upper collar 11).

  The upper arm 11 is preferably made of a rigid material such as metal, ceramics, or a hard resin or a reinforced resin such as FRP, but is not necessarily limited to a rigid material. It can also comprise by the material comprised by a combination. The upper collar 11 made of various materials can be set to an appropriate shape such as a substantially polygonal shape, a substantially circular shape, a substantially oval diameter, or a substantially elliptical shape in plan view. It is advantageous in terms of replacement from the top or construction. In addition, you may comprise the upper collar 11 so that an outer surface may be entirely covered with coating layers, such as an elastic body, and a weather resistance and a rust prevention effect may be acquired.

  As a means for fixing the upper collar 11 to the upper structure 1, the upper collar 11 may be directly secured to the upper structure using fastening means such as bolts and nuts. The upper plate 11 is indirectly fixed to the upper structure 1 using the upper plate 3 having a plate shape with a larger area. The method for fixing the upper collar 11 to the upper structure 1 is not limited to these examples.

  When used as a movable support device, the sliding member 4 is disposed above the upper rod 11, for example, between the upper rod 11 and the upper plate 3, so that the upper structure 1 and the support device 10 are relative to each other. You may fix so that displacement is possible. As the sliding member 4, for example, a plate having a surface with a low coefficient of friction such as polytetrafluoroethylene (PTFE) which is a kind of fluorocarbon resin is fixed to the upper surface of the upper collar 11, or It can be configured by being fixed to the upper structure 1 or the lower surface on the attachment means side fixed to the upper structure 1.

  The lower arm 12 is preferably composed of a rigid material such as metal, ceramics, or a reinforced resin such as a hard resin or FRP, but is not necessarily limited to a rigid material. It can be constituted by a material constituted by a combination of a rigid material and an elastic material. The lower bar 12 made of various materials can be set to an appropriate shape such as a substantially polygonal shape, a substantially circular shape, a substantially oval diameter, or a substantially oval shape in plan view. It is advantageous in terms of top, construction, and replacement. The planar shape or the like of the lower eyelid 12 does not necessarily match the upper eyelid 11, but the size of each part, the shape and position of the convex portion and the recessed portion, etc. match the setting of the lower eyelid 12 and the setting of the upper eyelid 11. It is necessary to let In addition, the lower eyelid 12 can also be comprised so that an outer surface may be entirely covered with coating layers, such as an elastic body, and a weather resistance and a rust prevention effect may be acquired.

  As a fixing means of the lower rod 12 with respect to the lower structure, for example, the lower rod 12 may be directly fixed to the lower structure 2 by using fastening means such as bolts and nuts. The lower rod 12 is indirectly fixed to the lower structure 2 using lower fixing means such as the lower plate 5 having a plate shape with a larger area. The method for fixing the lower rod 12 to the lower structure 2 is not limited to these examples.

  When used as a movable bearing device, a sliding member 6 is disposed below the lower rod 12, for example, between the lower plate 5 and the lower rod 12, so that the lower structure 2 and the bearing device 10 are relative to each other. You may fix so that displacement is possible. As the sliding member 6, for example, a plate having a low coefficient of friction surface such as PTFE is fixed to the lower surface of the lower rod 12, or the lower structure 2 or the lower structure 2 is fixed. It is possible to fix to the upper surface on the means side.

  The direct or indirect fixing of the upper rod 11 and the lower rod 12 is preferably a detachable method, and fastening with bolts, nuts, etc. is an example.

[2. Explanation of elastic body and elastic deformation restraint body]
As the elastic body 13, natural rubber, synthetic rubber, thermoplastic elastomer or thermosetting elastomer can be used, and among these, natural rubber is preferably used as a main component. Specific elastomer components include, for example, natural rubber (NR), polyisoprene rubber (IR), polybutadiene rubber (BR), styrene-butadiene rubber (SBR), chloroprene rubber (CR), ethylene-propylene rubber, butyl rubber ( IIR), halogenated butyl rubber (brominated, chlorinated, etc.), acrylic rubber, polyurethane, silicone rubber, fluorinated rubber, polysulfide rubber, hyperon, ethylene vinyl acetate rubber, epichlorohydrin rubber, ethylene-methyl acrylate copolymer, styrene series Elastomer, urethane elastomer, polyolefin elastomer, acrylonitrile-butadiene rubber (NBR), styrene-isoprene-styrene block copolymer (SIS), epoxidized natural rubber, trans-polyisoprene, norbornene Ring polymer (polynorbornene), styrene-butadiene rubber (SBR), high styrene resin, a rubber such as isoprene rubber alone, or may be used in combination of two or more.

  The elastic body 13a shown in FIG. 2 has, for example, a cylindrical shape and one (single layer) elastic layer in which a rigid reinforcing plate such as an iron plate is not provided. The elastic body 13a is provided with a convex portion 14 and a concave portion 15 on the side surface. In the example shown in FIG. 2, convex portions 14 that are continuous in the circumferential direction are provided in the central portion in the thickness direction so as to form a wave shape in the thickness direction, and in the circumferential direction on the upper side and the lower side of the convex portion 14. The continuous recessed parts 15 and 15 are provided, and the convex parts 14 and 14 continued in the circumferential direction are further provided at the upper and lower ends in the thickness direction.

  Moreover, the elastic body 13b shown in FIG. 3 also has a columnar shape and has a single elastic layer (single layer) in which no reinforcing plate is provided. The elastic body 13b is provided with irregular projections 14 having irregularities on the side surface, and concave portions 15 in areas where the projections 14 are not provided. Note that the protruding convex portions 14 may be provided regularly, and may have various sizes and protruding directions. Moreover, in the elastic body 13c shown in FIG. 4, the elongate convex part 14 is provided in the circumferential direction of the side surface intermittently at equal intervals. The convex portions 14 may be provided at various intervals in the circumferential direction. Further, the interval in the thickness direction may be equal or not equal. Hereinafter, an elastic body having a single elastic layer is also simply referred to as an elastic body 13.

  In the example shown in FIG. 1, the elastic body 13 as described above is disposed on the lower collar 12 and supported by the lower collar 12. The elastic body 13 may be bonded to the upper collar 11 and the lower collar 12 to increase the bearing pressure. However, by not bonding, the elastic follower 13 can also achieve good rotation followability.

  The elastic body 13 is surrounded by an elastic deformation restraining body 16 as shown in FIG. The elastic deformation restraining body 16 is a cylindrical body having an inner diameter slightly larger than the outer diameter of the elastic body 13, and is fixed to either the upper collar 11 or the lower collar 12, or the outer periphery of the upper collar 11 in FIG. 1. For example, the upper rod 11 and the elastic deformation restraining body 16 may be coupled by using a fixing means 16b such as a bolt and a nut. As the fixing means 16b, either one of the upper collar 11 and the elastic deformation restraining body 16 is provided with a male screw, and the other is provided with a female screw. Further, it can be performed by a conventionally known bonding method or the like. The tip of the elastic deformation restraining body 16 on the lower collar 12 side is located outside the outer periphery of the lower collar 12 and is not fixed. As a result, the upper rod 11 can move vertically downward while compressing the elastic body 13 when a vertical load is input. In other words, the elastic body 13 disposed between the upper eyelid 11 and the lower eyelid 12 is shear-deformed by the tip of the elastic deformation restraining body 16 on the lower eyelid 12 side being positioned outside the outer peripheral portion of the lower eyelid 12. And a role of a piston that restrains the elastic body 13 in a substantially hermetically sealed state to increase the bearing pressure. Thus, the elastic body 13 supported by the lower collar 12 is disposed in a substantially sealed space with the upper surface surrounded by the upper collar 11 and the side surface by the elastic deformation restraining body 16. The bearing device 10 is a substantially sealed rubber bearing, and can support a high load with a small bearing area.

  Here, the relationship between the sizes of the elastic body 13 and the elastic deformation restraining body 16 will be described. In the example of FIG. 1, the support device 10 is installed between the upper structure 1 and the lower structure 2, and the support device. 10, in a state where the elastic body 13 is deformed by the load of the upper structure 1, the convex portion 14 on the side surface of the elastic body 13 is in contact with the restraining surface 16 a on the inner peripheral surface of the elastic deformation restraining body 16. It has become. That is, as shown in FIG. 5, the convex portion 14 on the side surface of the elastic body 13 is constrained on the inner peripheral surface of the elastic deformation restraining body 16 before being installed between the upper structure 1 and the lower structure 2. When it is installed between the upper structure 1 and the lower structure 2, it is elastic due to the dead load of the upper structure 1. The convex portion 14 on the side surface of the body 13 is in contact with the restraining surface 16 a on the inner peripheral surface of the elastic deformation restraining body 16. In the case of a load in the normal use range, the convex portion 14 on the side surface of the elastic body 13 is not in contact with the restraint surface 16a on the inner peripheral surface of the elastic deformation restraint body 16, and a high load that exceeds the normal use range. The convex portion 14 on the side surface of the elastic body 13 comes into contact with the constraining surface 16a on the inner peripheral surface of the elastic deformation restraining body 16, and the convex portion 14 and The bulged and deformed portion of the recess 15 may be pressed.

  Furthermore, as shown in FIG. 6, the convex portion 14 on the side surface of the elastic body 13 is constrained on the inner peripheral surface of the elastic deformation restraining body 16 before being installed between the upper structure 1 and the lower structure 2. The state which contact | abutted to 16a may be sufficient. In this case, when the elastic body 13 is disposed in the elastic deformation restraining body 16, the elastic body 13 in the elastic deformation restraining body 16 can be accurately positioned.

  As described above, when the elastic body 13 used in the present invention is provided with the convex portion 14 on the side surface of the elastic body 13 and the concave portion 15 other than the convex portion 14, when a vertical load is applied to the elastic body 13, Further, the elastic body 13 is displaced vertically downward, and the deformation amount of the elastic body 13 is limited by the elastic deformation restraining body 16. Therefore, as long as such an action can be realized, the positions and sizes of the convex portions 14 and the concave portions 15 provided on the side surfaces of the elastic body 13 are not limited to the above examples.

[3. Explanation of operation of bearing device]
In the support device 10 as described above, when installed between the upper structure 1 and the lower structure 2, as shown in FIG. 1, the elastic body 13 is caused by a load (dead load) in a normal use range. The convex portion 14 of the elastic body 13 is compressed and becomes a position close to or in contact with the restraining surface 16 a of the elastic deformation restraining body 16 surrounding the elastic body 13. In the support device 10, the elastic body 13 is elastically deformed in accordance with the magnitude of the vertical load, and the elastic deformation is restrained while the side surface convex portion 14 is deformed so as to fill the gap formed by the concave portion 15. The body 16 is pressed against the restraining surface 16a.

  In such a support device 10, the elastic body 13 supported by the lower rod 12 is surrounded by the upper rod 11 and the elastic deformation restraining body 16, and the convex portion 14 and the concave portion 15 are provided on the side surface of the elastic body 13, By providing a substantially sealed space with a predetermined gap between the constraining surface 16a and at the initial stage of heavy input or when inputting a low load, it is possible to perform vertical flexible displacement with respect to the vertical load. As the load increases, the amount of increase in vertical displacement gradually decreases and the elastic modulus increases, and when a large load is input, it behaves like a hermetic rubber bearing and has a small bearing area and a high load. Realize support. In addition, when a rotational force is applied in the vertical plane over a low load to a high load input, the elastic body 13 is partially supported by the elastic deformation restraining body 16, but the elastic body is caused by the gap between the convex portion 14 or the concave portion 15. 13 is deformed, and excellent rotation followability can be realized without an extreme load on the elastic body.

Here, FIG. 7 shows the relationship between the amount of displacement in the vertical direction and the vertical load.
Line 101... The clearance between the restraint surface 16 a and the side surface of the elastic body 13 by reducing the outer shape of the elastic body 13 and / or forming the recess 15 larger than the inner diameter of the elastic deformation restraining body 16. Shows the characteristics when. (Large gap)
Line 102... Shows characteristics when the gap between the restraining surface 16 a and the side surface of the elastic body 13 is made smaller than that of the line 101. (In the gap)
Line 103... Shows characteristics when the gap between the restraint surface 16a and the side surface of the elastic body 13 is minimized. (Small gap)

  According to the example of FIG. 7, the amount of vertical displacement increases as the vertical load increases, but the characteristic is non-linear, and the slope of the graph indicating the magnitude of the vertical load reaction force against the vertical displacement (constraint degree or spring) The constant) increases as the vertical displacement or the vertical load reaction force increases. Thus, the support device 10 changes to a more advanced sealed state as a large load is input by providing a gap between the constraining surface 16a and the side surface of the elastic body 13 by the concave portion and the convex portion. Thus, the upper structure 1 can be supported with such a characteristic that the amount of increase in the vertical displacement is small, that is, the degree of restraint is variable. In other words, the bearing device 10 can support a high load while having appropriate vertical flexibility. Further, the smaller the gap, the narrower the range (primary gradient) of the slope of the graph representing the magnitude of the vertical load reaction force with respect to the vertical displacement can be set.

[4. Explanation of laminated elastic body]
In the above example, the supporting device 10 using the elastic body 13 having a single elastic layer has been described. As the elastic body 13, a laminated structure in which an elastic layer and a reinforcing plate are laminated as shown in FIG. The elastic body 17 may be used. The elastic body 17 includes a reinforcing plate 17a, a plurality of elastic layers 17b, and the reinforcing plate 17a and the elastic layer 17b are bonded to each other by vulcanization bonding. When a load is applied to the single-layer elastic body 13, the free side surface is pushed out to the side, and in particular, bulges around the central portion in the thickness direction. In the laminated elastic body 17, since the reinforcing plate 17 a is provided, swelling of the free side surface of the elastic body 17 is suppressed, and the load bearing capacity is increased. However, since the side surface of the elastic layer 17b between the reinforcing plates 17a is also a free side surface, it slightly bulges to the side according to the load. However, in the support device 10, since the elastic deformation restraining body 16 restrains the deformation of the elastic body 17, the bulge amount is small.

  That is, as shown in FIG. 8, in the laminated elastic body 17, on the side surface, the convex portion 18 is provided at the position of the elastic layer 17b on the free side surface, and the concave portion 19 is provided at the position of the reinforcing plate 17a. In this case, when the load is applied, the convex portion 18 comes into strong pressure contact with the restraining surface 16a of the elastic deformation restraining body 16 before the concave portion 19 due to the free side surface of the elastic layer 17b bulging. Of course, in the present invention, as shown in FIG. 9, the position of the reinforcing plate 17 a may be the convex portion 18 and the position of the elastic layer 17 b may be the concave portion 19. In this case, since the free side surface of the elastic layer 17b which is the concave portion 19 slightly bulges, the convex portion 18 and the concave portion 19 are similarly brought into contact with the constraining surface 16a of the elastic deformation constraining body 16 and are even. It can be made to press. The laminated elastic body 17 is an elastic portion at a position between the reinforcing plates that has the largest amount of bulging in the past, and this convex portion is provided by a constraining surface 16a of the elastic deformation restraining body 16 after providing a convex portion 18 at this portion. Since the bulging amount around 18 is restricted, local stress on the elastic layer 17b around the internal reinforcing plate 17a is relieved even when a high load is input. Further, the internal reinforcing plate 17a is not easily crushed by a high load, and the reinforcing plate 17a can be thinned, and the entire thickness of the support device 10 can be reduced.

  The size relationship between the laminated elastic body 17 and the elastic deformation restraining body 16 is the same as in the case of the elastic body 13, and as described with reference to FIGS. The side protrusions 18 may be in a non-contact state with the inner peripheral restraint surface 16a of the elastic deformation restraint body 16, but may be in a contact state. In this case, the elastic body 17 is assembled during assembly. This is preferable because the convex portion 18 on the side surface comes into contact with the restraining surface 16a on the inner peripheral surface of the elastic deformation restraining body 16 and positioning is improved. However, the presence / absence of contact between the elastic body and the elastic deformation restraint body when there is no input is not particularly limited. For example, when a large load is input, the convex portion 18 on the side surface of the elastic body 17 is elastic. You may make it contact with the restraint surface 16a of the internal peripheral surface of the deformation | transformation restraint body 16. FIG.

  8 and 9, the upper collar 11 and the elastic deformation restraining body 16 are integrally formed. In the laminated elastic body 17, the vertical load support performance, horizontal load support performance, and vertical rotation performance are adjusted by the area and thickness of the elastic layer, the number, the area and thickness of the reinforcing plate, the number, and the like. I can do it. Also. The elastic deformation restraining body 16 is fixed to the outer peripheral side of the lower surface of the upper collar 11. For example, the upper rod 11 and the elastic deformation restraining body 16 may be coupled by using a fixing means 16b such as a bolt and a nut. Further, as the fixing means 16b, either one of the upper collar 11 and the elastic deformation restraining body 16 is provided with a male screw and the other is provided with a female screw, and these are screwed together and welded together. Further, it can be performed by a conventionally known bonding method or the like.

[5. Description of modification of reinforcing plate]
Specifically, the reinforcing plate 17a used for the laminated elastic body 17 can be configured as shown in FIG. In the example shown in FIG. 10 (A), a protrusion 21a is provided at the center of the surface of the upper collar 11 on the side where the elastic body 17 is disposed, and an annular recess 21b is provided around the protrusion 21a. . Moreover, the protrusion part 22a is provided in the center part of the surface by which the elastic body 17 of the lower collar 12 is arrange | positioned, and the recessed part 21b is provided in the circumference | surroundings of the protrusion part 22a. Therefore, the elastic body 17 disposed between the upper collar 11 and the lower collar 12 has a thin center portion and an annular thick portion around the periphery. Inside the elastic body 17, an annular reinforcing plate 17 a is provided in an outer peripheral region that becomes a thick portion. In the elastic body 17, a concave portion 19 is provided at a position of the reinforcing plate 17 a on the side surface, and a convex portion 18 is provided continuously or intermittently at the position of the elastic layer 17 b. Of course, the convex portion 18 may be provided at the position of the reinforcing plate 17a, and the concave portion 19 may be provided at the position of the elastic layer 17b. Moreover, you may make it provide the space | gap part 23a in the center part of the elastic body 17 for a restraint degree adjustment. Since such an elastic body 17 has a thin portion at the center and an annular thick portion around the center portion, it is possible to improve the rotation followability.

  FIG. 10 (B) is a modification of FIG. 10 (A), in which the surface on the side where the elastic body 17 of the lower eyelid 12 is disposed is formed flat, and only the upper eyelid 11 side has a protrusion 21a and a recess. 21b. In this elastic body 17, since the surface of the lower eyelid 12 on which the elastic body 17 is disposed is formed flat, the shape of the lower eyelid 12 and the elastic body 17 can be simplified, and the processing cost can be reduced. Can be reduced. Also in this example, the gap portion 23 a may be provided in the central portion of the elastic body 17. Further, on the side surface of the elastic body 17, a concave portion 19 is provided at the position of the reinforcing plate 17a, and a convex portion 18 is provided continuously or intermittently at the position of the elastic layer 17b. Of course, the convex portion 18 may be provided at the position of the reinforcing plate 17a, and the concave portion 19 may be provided at the position of the elastic layer 17b.

  In FIG. 10C, a plurality of annular reinforcing plates 17 a are provided concentrically with the elastic body 17. In this example, the opposed surfaces of the upper collar 11 and the lower collar 12, that is, the surface on which the elastic body 17 is disposed are formed flat. In this example, the protrusions 21a and 22a and the recesses 21b and 22b (see FIGS. 10A and 10B) are not provided on the surface on which the elastic body 17 of the upper and lower collars 11 and 12 is disposed. The structure is simplified and the processing cost can be reduced. The number of the plurality of annular reinforcing plates 17a may be one on the inner peripheral side or one on the outer peripheral side, and the number is not particularly limited. Further, in FIG. 10C, a plurality of annular reinforcing plates 17a are provided concentrically at the same height, but the heights at which the reinforcing plates 17a are provided are not necessarily the same. In this example as well, a gap 23a may be provided in the center of the elastic body 17. Further, on the side surface of the elastic body 17, a convex portion 18 is provided at the position of the reinforcing plate 17a, and a concave portion 19 is provided continuously or intermittently at the position of the elastic layer 17b. Of course, the concave portion 19 may be provided at the position of the reinforcing plate 17a, and the convex portion 18 may be provided at the position of the elastic layer 17b.

  In FIG. 10D, a plurality of reinforcing plates 17a are provided in parallel and spaced apart from each other. In this example, the number of reinforcing plates 17a may be one or more. In this example, a convex portion 18 is provided on the side surface at the position of the reinforcing plate 17a, and a concave portion 19 is provided continuously or intermittently at the position of the elastic layer 17b. Of course, the concave portion 19 may be provided at the position of the reinforcing plate 17a, and the convex portion 18 may be provided at the position of the elastic layer 17b.

  In FIG. 10E, a plurality of annular protrusions 17c are provided concentrically on the front and back of the reinforcing plate 17a. In this example, the number of reinforcing plates 17a may be one or more. Further, the number of the annular protrusions 17c is not particularly limited, and may be one, for example. Moreover, the cyclic | annular protrusion part 17c may be an intermittent thing instead of a continuous protrusion part. In this example, the convex part 18 is provided in the position of the reinforcement board 17a of the side surface of the elastic body 17, and the recessed part 19 is provided in the position of the elastic layer 17b continuously or intermittently. Of course, the concave portion 19 may be provided at the position of the reinforcing plate 17a, and the convex portion 18 may be provided at the position of the elastic layer 17b. Further, the annular protrusion 17c may be provided on only one of the front and back surfaces, and a plurality of reinforcing plates 17a may be provided.

[6. Modification 1 of bearing device]
A support device 30 shown in FIG. 11 is provided with a core 31 attached to the lower rod 12 and provided with a lifting prevention portion and a horizontal displacement prevention portion. The bearing device 30 includes an elastic body 17 having a laminated structure in which an elastic layer and a reinforcing plate are laminated between an upper collar 11 as a first rigid body and a lower collar 12 as a second rigid body. ing. The upper collar 11 of the support device 30 has a through hole 32 penetrating through the front and back surfaces. The core material 31 is inserted into the through-hole 32 from the upper surface side of the upper collar 11, and the amount of displacement of the upper collar 11 vertically downward is considered without the tip portion of the core material 31 protruding from the upper surface of the upper collar 11. Thus, the tip portion is accommodated so as to be lowered one step further. A lifting prevention piece 32 a is formed in a flange shape at the opening end of the through hole 32.

  The core member 31 inserted into the through hole 32 is made of a metallic bolt-shaped member having a head that becomes the large diameter portion 33, and the large diameter portion 33, which is the tip portion, is inside the through hole 32 of the upper collar 11. It is set to a size that can be accommodated. The core material 31 is inserted into the insertion hole 34 formed in the substantially central portion of the elastic body 17 from the through hole 32 of the upper collar 11, and further, the screw formed on the support surface side of the elastic body 17 of the lower collar 12. It is fixed by being screwed into the hole 35. When the core material 31 is inserted from the through hole 32 and fixed to the screw hole 35, the large diameter portion 33 is accommodated in the through hole 32 so as to be lowered by one step. The core material 31 is fixed to the lower rod 12 so that when the upper rod 11 and the lower rod 12 are about to be displaced relatively in the horizontal direction, the core material 31 becomes the tip surface or the through hole of the lifting prevention piece 32a. The displacement of the upper collar 11 is regulated by the core 31 fixed to the lower collar 12 while hitting the side surface of the lower collar 32. That is, the core material 31 functions as a horizontal displacement prevention unit, and prevents the upper collar 11 and the lower collar 12 from being excessively displaced in the horizontal direction. Further, the large-diameter portion 33 of the core member 31 is larger than the opening diameter of the lifting prevention piece 32a of the through hole 32 and engages with the lifting prevention piece 32a. The core material 31 has a large-diameter portion of the core material 31 fixed to the lower collar 12 when an upward lifting force is applied to the upper collar 11, that is, a force that the upper collar 11 attempts to lift relative to the lower collar 12. When the lifting prevention piece 32 a is locked to the 33, it is possible to prevent the upper collar 11 and the lower collar 12 from separating. That is, the large diameter part 33 functions also as a lifting prevention part.

  The elastic body 17 is surrounded by an elastic deformation restraining body 16 as shown in FIG. The elastic deformation restraining body 16 is a cylindrical body having an inner diameter slightly larger than the average outer diameter of the elastic body 13, and is fixed to the outer peripheral portion of the upper collar 11. For example, the upper rod 11 and the elastic deformation restraining body 16 may be coupled by using a fixing means 16b such as a bolt and a nut. As the fixing means 16b, either one of the upper collar 11 and the elastic deformation restraining body 16 is provided with a male screw, and the other is provided with a female screw. It can be performed by a conventionally known bonding method or the like.

  The tip of the elastic deformation restraining body 16 on the lower collar 12 side is located outside the outer periphery of the lower collar 12 and is not fixed. As a result, when the vertical load is input, the upper collar 11 can be displaced vertically downward while compressing the elastic body 13. That is, the tip of the elastic deformation restraining body 16 on the lower collar 12 side is positioned outside the outer periphery of the lower collar 12, so that it is arranged between the upper collar 11 and the lower collar 12 in cooperation with the core member 31. It functions to suppress the shear deformation of the elastic body 17 provided and to play a role of a cylinder that restrains the elastic body 17 in a substantially sealed state to increase the bearing pressure. Thus, the elastic body 17 supported by the lower collar 12 is disposed in a substantially sealed space with the upper surface surrounded by the upper collar 11 and the side surface by the elastic deformation restraining body 16. That is, the bearing device 10 is a substantially sealed rubber bearing, and can support a high load with a small bearing area.

  Even in such a support device 30, as with the above-described support device 10, the elastic body 17 supported by the lower collar 12 is surrounded by the upper collar 11 and the elastic deformation restraining body 16 to be substantially sealed. Forming a space portion and providing a high load bearing with a small bearing area like a substantially sealed rubber bearing, while providing a convex portion 18 and a concave portion 19 on the side surface of the elastic body 17, By providing a gap between them, it is possible to realize a vertical flexible displacement with respect to a vertical load. In addition, when the rotating action is performed, the elastic body 17 is deformed by a gap formed by the convex portion 18 or the concave portion 19, and good rotation followability can be realized. And as shown in the said FIG. 7, by providing a clearance gap by the recessed part 19 and the convex part 18 between the constraining surface 16a and the side surface of the elastic body 17, a more highly sealed is sealed, so that a big load is input. By changing to the state, the amount of increase in the vertical displacement can be reduced.

  In the support device 30, the elastic body 17 serving as a support body may be a single-layer elastic body 13 (see FIG. 2-4). Alternatively, the upper eyelid 11 may be used as the lower eyelid, and the lower eyelid 12 may be used as the upper eyelid. Furthermore, when installing in the upper structure 1 and the lower structure 2, as described above, the upper plate 3 and the lower plate 5 may be interposed and fixed, and the sliding members 4 and 6 are further interposed. It is possible to fix them (see FIG. 1). Further, as shown in FIG. 12, the support device 30 may fix the elastic deformation restraining body 16 to the outer peripheral portion of the lower rod 12 instead of the upper rod 11 by the fixing means 16 b. In this case, the distal end portion of the elastic deformation restraining body 16 is located outside the outer peripheral portion of the upper collar 11 and is not fixed. As a result, when the vertical load is input, the upper collar 11 can be displaced vertically downward while compressing the elastic body 13.

[7. Modification 2 of bearing device]
In the support device 40 shown in FIG. 13, the core member 41 is configured such that the upper rod 11 and the lower rod 12 are not penetrated. In this support device 40, a core material 41 is attached to the lower rod 12, and a lifting prevention portion and a horizontal displacement prevention portion are provided. In addition, the bearing device 40 includes an elastic body 17 having a laminated structure in which an elastic layer and a reinforcing plate are laminated between an upper collar 11 as a first rigid body and a lower collar 12 as a second rigid body. ing.

  The upper collar 11 is disposed on the upper surface of the elastic body 17, and the elastic deformation restraining body 16 is fixed to the outer peripheral portion. For example, the upper collar 11 and the elastic deformation restraining body 16 may be coupled using a fixing means 16b such as a bolt and a nut. Further, as the fixing means 16b, either one of the upper collar 11 and the elastic deformation restraining body 16 is provided with a male screw and the other is provided with a female screw, and these are screwed together and welded together. It can be performed by a conventionally known bonding method or the like. The tip of the elastic deformation restraining body 16 on the lower collar 12 side is formed with a flange-shaped lifting prevention piece 42 projecting inward.

  The core member 41 is made of a metal bolt-shaped member having a head portion that becomes the large-diameter portion 43, and the tip portion is screwed into a screw hole 44 formed on the support surface side of the elastic body 17 of the lower collar 12. Fixed by. The core member 41 has a large diameter portion 43 at the upper end portion, and serves as a support surface that supports the elastic body 17. Further, the large diameter portion 43 engages with the rising prevention piece 42 of the elastic deformation restraining body 16 fixed to the outer peripheral portion of the upper collar 11. The large-diameter portion 43 of the core member 41 fixed to the lower rod 12 serves as an anti-lifting portion, and when an upper lifting force is applied to the upper rod 11, the upper anti-raising piece 42 on the upper rod 11 side is locked. This prevents the upper eyelid 11 and the lower eyelid 12 from separating. Further, the large-diameter portion 43 of the core member 41 is formed to have a size that slides on the restraining surface 16a of the elastic deformation restraining body 16, and restrains the elastic body 17 in a substantially sealed state so as to increase the bearing pressure. It functions like a piston, allows vertical displacement, and functions as a horizontal displacement prevention unit, and restricts horizontal displacement by the core member 41. Thereby, it is possible to prevent the upper collar 11 and the lower collar 12 from being relatively displaced in the horizontal direction. Furthermore, a gap is provided between the lifting prevention piece 42 and the lower rod 12 so that the lifting prevention piece 42 does not hit the lower rod 12 when the vertically downward upper rod 11 is displaced.

  Even in such a support device 40, the elastic body 17 supported by the lower collar 12 is surrounded by the upper collar 11 and the elastic deformation restraining body 16 in the same manner as the above-described bearing apparatuses 10 and 30. A constrained surface is formed by providing a convex space 18 and a concave portion 19 on the side surface of the elastic body 17 while constituting a sealed space and realizing a high load support with a small bearing area like a substantially sealed rubber bearing. By providing a gap with 16a, vertical flexible displacement according to the vertical load can be made possible. In addition, during the rotation action, the elastic body 17 is more easily deformed by the gap between the convex portion 18 or the concave portion 19, and good rotational followability can be realized. And as shown in the said FIG. 7, by providing the clearance gap between the constraining surface 16a and the side surface of the elastic body 17 by the recessed part 19 and the convex part 18, the more highly sealed state is, so that there is a big input. It is possible to reduce the amount of increase in the vertical displacement amount by changing the pressure to high pressure.

  In the support device 40, the elastic body 17 serving as a support body may be a single-layer elastic body 13 (see FIG. 2-4). Alternatively, the upper eyelid 11 may be used as the lower eyelid, and the lower eyelid 12 may be used as the upper eyelid. Furthermore, when installing in the upper structure 1 and the lower structure 2, as described above, the upper plate 3 and the lower plate 5 may be interposed and fixed, and the sliding members 4 and 6 are further interposed. It is possible to fix them (see FIG. 1).

[8. Modification 3 of bearing device]
A support device 50 shown in FIG. 14 is a further modification of the support device 40 of FIG. In this support device 50, a core material 51 is attached to the lower rod 12, and a lifting prevention portion and a horizontal displacement prevention portion are provided. In this support device 50, an elastic body 17 having a laminated structure in which an elastic layer 17b and a reinforcing plate 17a are laminated is interposed between an upper collar 11 as a first rigid body and a lower collar 12 as a second rigid body. ing.

  The upper collar 11 is disposed on the upper surface of the elastic body 17, and the elastic deformation restraining body 16 is fixed to the outer peripheral portion. For example, fixing means 16b such as bolts and nuts can be used for coupling the upper collar 11 and the elastic deformation restraining body 16. Further, as the fixing means 16b, either one of the upper collar 11 and the elastic deformation restraining body 16 is provided with a male screw and the other is provided with a female screw, and these are screwed together and welded together. It can be performed by a conventionally known bonding method or the like. The tip of the elastic deformation restraining body 16 on the lower collar 12 side is formed with a flange-shaped lifting prevention piece 52 projecting inward.

  The lower end portion of the core material 51 is fixed to the lower collar 12 serving as a base plate. The lower end surface of the core material 51 is provided with a positioning convex portion 51a, and the positioning convex portion 51a is positioned by being fitted into the positioning concave portion 51b on the lower collar 12 side. Further, the lower rod 12 is formed with an insertion hole 55a, and the fixing bolt 55b is fixed by being fastened to a fixing hole 55c provided at the lower end portion of the core member 51. A large-diameter portion 53 serving as a support surface for supporting the elastic body 17 is integrally provided at the upper end portion of the core material 51. The large-diameter portion 53 is provided with a screw hole 53a at the center of the back surface, and is integrated by tightening a screw portion 54 formed at the tip of the core material 51 into the screw hole 53a. Note that the bolt head portion of the fixing bolt 55b is accommodated without protruding into the recess 55d communicating with the insertion hole 55a of the lower collar 12.

  The large-diameter portion 53 integral with the core member 51 engages with the rising prevention piece 52 of the elastic deformation restraining body 16 whose lower surface of the outer peripheral portion is fixed to the outer peripheral portion of the upper collar 11. The large-diameter portion 53 of the core member 51 integrated with the lower rod 12 serves as a lifting prevention portion, and when the upper lifting force is applied to the upper collar 11, the lifting prevention piece 52 on the upper collar 11 side is locked. This prevents the upper eyelid 11 and the lower eyelid 12 from separating. Further, the large-diameter portion 53 of the core material 51 is formed in such a size as to slide on the restraining surface 16a of the elastic deformation restraining body 16, and restrains the elastic body 17 in a substantially sealed state so as to increase the bearing pressure. It functions like a piston, allows vertical displacement, and functions as a horizontal displacement prevention unit, and the horizontal displacement is regulated by the core material 51. Thereby, it is possible to prevent the upper collar 11 and the lower collar 12 from being relatively displaced in the horizontal direction. Furthermore, a gap is provided between the lifting prevention piece 52 and the lower rod 12 so that the upper prevention piece 52 does not hit the lower rod 12 when the upper rod 11 is displaced vertically downward. .

  Even in such a bearing device 50, the elastic body 17 supported by the lower collar 12 is surrounded by the upper collar 11 and the elastic deformation restraining body 16 in the same manner as the above-described bearing apparatuses 10, 30, and 40. The convex portion 18 and the concave portion 19 are provided on the side surface of the elastic body 17 while forming a substantially sealed space portion and realizing a high load bearing with a small bearing area like a sealed rubber bearing. By providing a gap with the surface 16a, it is possible to realize a vertical flexible displacement with respect to a vertical load. In addition, during the rotation action, the elastic body 17 is more easily deformed by the gap between the convex portion 18 or the concave portion 19, and good rotational followability can be realized. And as shown in the said FIG. 7, by providing a clearance gap by the recessed part 19 and the convex part 18 between the constraining surface 16a and the side surface of the elastic body 17, the more highly sealed state is, so that there is a big load. Thus, the amount of increase in the vertical displacement can be reduced.

  In the support device 50, the elastic body 17 serving as a support body may be a single-layer elastic body 13 (see FIG. 2-4). Alternatively, the upper eyelid 11 may be used as the lower eyelid, and the lower eyelid 12 may be used as the upper eyelid. Furthermore, when installing in the upper structure 1 and the lower structure 2, as described above, the upper plate 3 and the lower plate 5 may be interposed and fixed, and the sliding members 4 and 6 are further interposed. It is possible to fix them (see FIG. 1).

[9. Modification 4 of bearing device]
In the above example, the case where the convex portions 14 and 18 and the concave portions 15 and 19 are provided on the side surfaces of the elastic bodies 13 and 17 has been described. However, as shown in FIG. Instead of providing the portions 14 and 18 and the concave portions 15 and 19, the convex portion 61 or the concave portion 62 may be provided on the restraining surface 16 a of the elastic deformation restraining body 16. The structure of the support device is the same as that of the support device 40 shown in FIG. Here, as an example, the laminated elastic body 17 is used. In FIG. 15, a flange-shaped lifting prevention piece 52 is fixed to the distal end portion of the elastic deformation restraining body 16 on the lower collar 12 side by fixing means 16 c such as bolts and nuts so as to protrude inward.

  On the restraining surface 16a of the elastic deformation restraining body 16 shown in FIG. 15, a convex portion 61 is provided at the position of the elastic layer 17b on the free side surface, and a concave portion 62 is provided at the position of the reinforcing plate 17a. In this case, when a load is applied to the convex portion 61, the free side surface of the elastic layer 17 b bulges, so that the side surface that bulges laterally between the reinforcing plates 17 a and 17 a is pressed into contact with the convex portion 61. Will be. Of course, in the present invention, as shown in FIG. 16, the position of the reinforcing plate 17a may be the convex portion 61, and the position of the elastic layer 17b may be the concave portion 62. In this case, the free side surface of the elastic layer 17b which is the concave portion 62 slightly bulges so that the convex portion 61 and the concave portion 62 are pressed against the constraining surface 16a of the elastic deformation constraining body 16 in the same manner. Can be made. Thus, even when the convex portion 61 and the concave portion 62 are provided on the restraining surface 16 a of the elastic deformation restraining body 16, the convex portions 14 and 18 and the concave portions 15 and 19 are provided on the side surfaces of the elastic bodies 13 and 17. Although a similar effect can be obtained, if a convex portion or a concave portion is provided on the inner peripheral surface side of the elastic deformation restraining body 16 so that a gap is provided between the elastic bodies 13 and 17, a load is input. At this time, a vertical displacement occurs, whereby the position of each reinforcing plate 17a disposed inside the elastic bodies 13 and 17 is displaced vertically downward, and the positional relationship between the reinforcing plate 17a and the convex portion 61 deviates from the set position. In addition, there is a possibility that the required performance cannot be exhibited, and processing the rigid inner peripheral surface of the elastic deformation restraining body 16 is more expensive than processing the free side surfaces (elastic peripheral surfaces) of the elastic bodies 13 and 17. The convex part and the concave part are provided on the elastic bodies 13 and 17 side. Preferred.

[10. Other variations]
In the above description, the bridge support device has been described as the support device of the present invention. However, the present invention is not limited to the bridge support device, but as a support device for vibration control and seismic isolation of various structures. It can be adopted.

DESCRIPTION OF SYMBOLS 1 Upper structure, 2 Lower structure, 3 Upper plate, 4 Sliding member, 5 Lower plate, 6 Sliding member, 10 Support apparatus, 11 Upper rod, 12 Lower rod, 13 (13a, 13b, 13c) Elastic body , 14 convex part, 15 concave part, 16 elastic deformation restraint body, 16a restraint surface, 16b, 16c fixing means, 17 elastic body, 17a reinforcing plate, 17b elastic layer, 17c annular projecting part, 18 convex part, 19 concave part, 21a projecting Part, 21b recessed part, 22a protruding part, 22b recessed part, 23a gap part, 30 bearing device, 31 core material, 32 through hole, 32a lifting prevention piece, 33 large diameter part, 34 insertion hole, 35 screw hole, 40 bearing device, 41 Core material, 42 Lifting prevention piece, 43 Large diameter portion, 44 Screw hole, 50 Bearing device, 51 Core material, 51a Positioning convex portion, 51b Positioning concave portion, 52 Lifting prevention , 53 large-diameter portion, 53a screw hole, 54 the threaded portion, 55a through hole, 55b fixing bolt, 55c fixing hole, 55d recess 61 protrusion, 62 recess, 101-103 wire

Claims (10)

In a position where the first rigid body, the second rigid body, the elastic body disposed between the first rigid body and the second rigid body, and the side surface of the elastic body that has been elastically deformed approach or contact each other. An elastic deformation restraining body surrounding the elastic body,
In a state where a predetermined value or more is input, the elastic body has a convex portion and / or a concave portion on a side surface, and the elastic deformation restraining body is brought into contact with and / or pressed against the deformed elastic body. An elastic body restraint degree variable structure characterized by restraining deformation . The elastic body is surrounded by the first rigid body, the second rigid body, and the elastic deformation restraint body to be in a substantially sealed state,
2. The elastic body restraint degree variable structure according to claim 1 , wherein the elastic body restraint degree variable structure changes to a higher sealed state as the load on the elastic body increases. The elastic body, the elastic body restraint of variable structure according to claim 1 or 2, characterized in that the elastic layer reinforcing plate is constituted by a laminated structure that is laminated. A side surface of said elastic body, according to claim 3, characterized in that the said projections or recesses formed position or the position of one of the reinforcing plates of the reinforcement plate, to form a concave or convex portion on the other Elastic body restraint degree variable structure. The elastic body, the elastic body restraint of variable structure according to claim 1 or 2, characterized in that it is constituted by an elastic layer of a single layer. The elastic body restraint degree variable according to any one of claims 1 to 5 , wherein the convex portion or the concave portion is formed continuously or intermittently in a circumferential direction of a side surface of the elastic body. Construction. The elastic body restraint degree varying structure according to any one of claims 1 to 6 , wherein a gap is formed between a side surface of the elastic body and a restraining surface of the elastic deformation restraining body. The elastic body restraint degree varying structure according to any one of claims 1 to 6 , wherein the convex portion of the elastic body is in contact with a restraining surface of the elastic deformation restraining body. The elastic body restraint degree variable structure according to any one of claims 1 to 8 , wherein the elastic deformation restraint body is provided integrally with the first rigid body. The elastic body restraint degree variable structure according to any one of claims 1 to 8 , wherein the elastic deformation restraint body is provided integrally with the second rigid body.

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