JP5651429B2 - Bearing device - Google Patents

Description

  The present invention relates to a support device for supporting various structures such as buildings and bridges.

  Originally, bearing devices for structures such as buildings and bridges are roughly divided into horizontal load support functions for supporting horizontal loads, vertical load support functions for supporting vertical loads, and rotational loads in the vertical plane. A vertical rotation support function and the like are required. In particular, since the Great East Japan Earthquake in 1995, rubber bearing devices with rubber as the main component have been required for bridge bearing devices. Among them, a laminated rubber bearing device having a vertical load supporting performance and a high horizontal force dispersion performance has been widely used.

  This laminated rubber bearing device is configured, for example, as described in Patent Document 1, in which rubber plates and iron plates are alternately laminated, and these are bonded to each other by vulcanization bonding, and the upper portion thereof is a bridge girder or the like. The lower part is fixed to the lower structure such as a pier and is used.

  However, since the laminated rubber bearing device adopts a laminated structure in terms of structure, the required thickness becomes inevitably large and bulky, and it is necessary to increase the area to support a high load. There is a disadvantage that the size is increased. Therefore, when the size of the support device is increased due to performance requirements, the area of the upper surface of the pier or abutment, which is a substructure, is required to be larger, and the cost of the entire bridge is increased. There is.

  In addition, when a large bearing device is required and it is not newly installed, the size of the bearing device is particularly problematic because the installation space is limited because the existing bearing device is installed. There was a problem that it could not be replaced unless it was a small bearing device with a small area.

  In recent years, with the increase in the size of structures such as buildings and bridges and the anticipated increase in the scale of earthquakes, the functions and performance required for bearing devices have become more sophisticated. It is inevitable that the size will increase.

  From such a background, for example, as a function-separated fixed bearing described in Patent Document 2 as an improvement in the problem of the laminated rubber bearing device that is increased in size due to the improvement in vertical high load support performance as described above. An elastic bearing device has been proposed.

  This elastic bearing device does not have the horizontal force distribution function that the laminated rubber bearing device has, but this function is provided to another bearing device to enhance the vertical load support function, and an annular groove is formed on the lower surface. The upper plate and the lower plate having an annular groove formed on the upper surface are disposed opposite to each other via an elastic layer that is fixed to the annular groove with no gap therebetween, and is provided at the center of the upper plate and the lower plate. A core-like protrusion that restrains shear deformation is disposed in the through hole.

  The elastic bearing device configured as described above has an elastic layer that is not thick, and there is no steel plate layer that is alternately laminated with the elastic layer. The height is low and it is set to be compact as a whole, and it has been proposed as a solution to the problem of increasing the size of the bearing device.

  By the way, in the case of an elastic bearing device using an elastic body such as a rubber including a laminated rubber bearing device, especially in the case of a bridge bearing device, unlike a steel bearing device, the bridge shaft has a vertical flexibility performance. The rotation in the vertical plane in the perpendicular direction is not achieved by the rotational performance, but is achieved by the vertical flexibility, and the rotation in the vertical plane in the bridge axis direction is performed by the compressive deflection in the vertical direction.

  However, in order to improve the compression deflection performance, that is, the vertical flexibility performance, it is necessary to improve the vertical elasticity. However, if this improvement is attempted, there is a tradeoff that the vertical load support performance is lowered. Furthermore, according to the specifications for road bridges, in rubber bearings, shear deformation is allowed but tensile force is not allowed to act on the component rubber. Therefore, the laminated rubber bearing device has rotational performance in the vertical plane. It was difficult. In the elastic bearing device of Patent Document 2, the elastic layer is thin, the vertical flexibility is low, and the compressive deflection is hardly taken. Neither vertical rotation performance was able to obtain good rotation performance.

  Further, in the elastic bearing device of Patent Document 2, a core-shaped protrusion that prevents horizontal shear deformation is provided, and a horizontal load cannot be elastically supported, and a plane occupied by the core-shaped protrusion It was impossible to support the vertical load by the area of, and in order to compensate for this, it was necessary to increase the area of the plane of the entire support device. Furthermore, in the elastic support device of Patent Document 2, the upper plate and the core-shaped protrusion repeatedly contact or slide, so that each shape is deformed or worn, and the upper portion of the protrusion is positioned. However, there is a drawback that rainwater or the like tends to accumulate in the cut-out holes formed in the upper plate, and the upper plate and protrusions are liable to be deteriorated.

JP 2002-181129 A Japanese Patent No. 4377429

  By the way, for example, when an upper structure such as a bridge girder is supported by a lower structure such as a pier via a support device with an appropriate interval between spans, when a heavy object is located in the middle of the upper structure Depending on the weight, the upper structure may bend with the support position by the support as a fulcrum and the intermediate position of the upper structure as a force point. Therefore, the rotational force in the vertical plane is applied to the support device at the support position. Will act. In this case, it is necessary for the bearing device disposed between the upper structure and the lower structure to follow the deformation of the upper structure.

  However, as described above, the conventional bearing device has a problem that sufficient rotation follow-up performance cannot be obtained. In particular, in the support device described in Patent Document 2, a core-like projection that exerts a resistance against the lifting force while restricting horizontal displacement inhibits rotation following, and an area occupied by the projection. There was a problem that the vertical load bearing capacity was considerably reduced.

  The present invention has been made in view of such circumstances, and can support a high load with a small area and sufficiently follow the rotational motion in the vertical plane of the supported body. It is an object of the present invention to provide a support device that enables this.

  The bearing device according to the present invention is a first base, a second base that is disposed opposite to the first base with an appropriate interval, one end side on the first base, the other end side on the second base, One or more core bodies each constituted by one or more members fitted, and an elastic body disposed on both end sides consisting of one end side and the other end side of the core body, One end is fitted into a fitting hole drilled in the first base, and the other end is fitted into a fitting hole drilled in the second base.

  According to the bearing device of the present invention, the first base and the second base are formed by the core body having one end fitted in the fitting hole of the first base and the other end fitted in the fitting hole of the second base. The relative displacement between the first base and the second base in a different direction with respect to the opposite direction of the core can be restrained, and the core is elastic at both ends by the elastic bodies disposed at both ends of the core. Further, the rotation follow-up performance can be obtained on both end sides of the core body, that is, on each of the first base side and the second base side.

  The core body is characterized by having a large diameter portion in which one end side or both end sides are set to have a large diameter. By providing the large diameter portion at the end of the core body, the contact area with the elastic body can be set large, and the stability of the core body with respect to the elastic body and the base can be improved. In particular, the base fitting hole into which the core body with the large diameter portion is fitted is set smaller than the large diameter portion, and the large diameter portion is engaged with the fitting hole. In this case, separation between the core body and the base is prevented.

  The core body is characterized by having a diameter-expanding portion that expands from one appropriate intermediate portion toward one end or both ends. Thus, rotation follow-up performance can be improved by setting an enlarged diameter part in a core. In particular, when the base fitting hole into which the end of the core body having the enlarged diameter part is fitted is provided with a diameter reduced toward the opposite base side along the enlarged diameter part, it is good. It becomes possible to obtain a good rotation followability.

  The core body is characterized in that one end or both ends are formed in a curved shape. When the end surface of the core body is provided in a curved shape, the dispersibility of the load applied to the core body can be adjusted by setting the curved surface, or the rotation follow-up performance can be adjusted.

  The core body is characterized in that one end or both ends are formed in a substantially convex curved shape. When the end portion of the core body is formed in a substantially convex curved surface shape, it is possible to improve the rotational follow-up performance while dispersing the load applied to the core body. In particular, the bottom of the fitting hole of the base to which the end of the core formed in a substantially curved shape is fitted is a substantially concave set corresponding to the end shape of the core formed in a substantially convex curved shape. When it is formed in a curved surface, it is possible to obtain good load supporting performance and good rotation followability.

  The core body is characterized in that one end or both ends are formed in a substantially concave curved surface shape. When the end portion of the core body is formed in a substantially concave curved surface shape, it becomes possible to improve the rotation followability while dispersing the load applied to the core body. In particular, the bottom of the fitting hole in the base to which the end of the core formed in a substantially curved shape is fitted is substantially convex set corresponding to the end shape of the core formed in a substantially concave curved shape. When it is formed in a curved surface, it is possible to obtain good load supporting performance and good rotation followability.

  The core body includes a first core body that forms an intermediate portion from one end side of the core body and a second core body that forms an intermediate portion from the other end side of the core body, and can be coupled to each intermediate portion. It is characterized by having a simple coupling means and coupling the coupling means together. Thus, even if it has a diameter-expanded part which expanded each diameter from the intermediate part toward both ends by comprising the core part from the two parts which combine the intermediate part by the connecting means, The core body can be fitted into the fitting holes that penetrate the first base board and the second base board, respectively, and the first base board and the second base board can be prevented from being detached from the core body. It becomes possible.

  One or both of the first base and the second base are characterized by being constituted by a holed board having a fitting hole therethrough and a closing board for closing the hole. In this way, by forming the base by two or more members, a fitting hole with a reduced diameter is provided, and the bottom is provided in the fitting hole while the core body is fitted, or the core located in the fitting hole. It is possible to support the high load by sealing the periphery of the end of the body together with the elastic body.

  One or both fitting holes of the first base and the second base have a small-diameter hole portion having a smaller diameter than the large-diameter portion of the core body. By setting such a small-diameter hole in the base, it is possible to prevent the core and the base from being detached when a core having a large diameter is fitted.

  One or both fitting holes of the first base and the second base are characterized by being drilled with a reduced diameter toward the opposing base. As described above, when the fitting hole is formed with a reduced diameter, the core body having the enlarged diameter portion that is enlarged from the intermediate portion toward the end portion is fitted into the fitting hole. In this case, it is possible not only to prevent the core body and the base from being detached, but also to improve the rotation followability of the support device.

  The fitting hole of one or both of the first base and the second base has a bottom. When the bottom portion is set in the fitting hole, it is possible to improve the sealing performance of the elastic body disposed in the fitting hole.

  The bottom part of the fitting hole of one or both of the first base and the second base is characterized by being substantially flat or curved. In this way, when the bottom of the fitting hole is set to be flat or curved, it is possible to adjust the rotation of the end of the core located in the fitting hole with respect to the base by setting the bottom surface. It becomes.

  The bottom part of the fitting hole of one or both of the first base and the second base is characterized by forming a convex curved surface or a concave curved surface. In this way, when the shape of the bottom of the fitting hole is set to a convex curved surface or a concave curved surface, good rotation is obtained when the end portion is used together with a core body that is set to an appropriate concave curved surface or convex curved surface. Followability can be obtained.

  The base surface facing the counterpart base of one or both of the first base and the second base is provided with a concave portion that is recessed toward the opposing base and / or a convex portion that protrudes toward the opposing base. It is characterized by that. According to this configuration, for example, when the third elastic body is disposed between the first base and the second base and is fixed to the base surfaces that come into contact with each other by vulcanization adhesion, the first base and the second base Even if a large torsional rotational displacement occurs between the two, the vulcanized bonded portion of the third elastic body can be prevented from peeling off.

  The base surface that faces one or both of the first base and the second base has a curved surface that forms a curved surface. According to this configuration, for example, when the third elastic body is disposed between the first base and the second base, the third elastic body acts with the curved surface shape of the curved surface portion to be set. The dispersibility of the load to be adjusted can be adjusted.

  The base surface facing the counterpart base of one or both of the first base and the second base is an inclined surface set so that the thickness of the base decreases from the center toward the outside. . According to this configuration, for example, when the third elastic body is disposed between the first base and the second base, the thickness of the third elastic body increases from the center of the base toward the outside. It is possible to set, and it is possible to suppress peeling due to distortion of the outer edge of the third elastic body while obtaining a large rotational followability.

  The base surface that faces one or both of the first base and the second base is an inclined surface that is set so that the thickness of the base increases from the center toward the outside. . According to this configuration, for example, when the third elastic body is disposed between the first base and the second base, the third elastic body that becomes thicker from the outside of the base toward the center is It is hold | maintained in the state close | similar to sealing between one base | substrate and a 2nd base | substrate, and it becomes possible to improve load support performance by this.

  The elastic body is characterized in that it is provided in contact with the end of the core body. This contact state is preferably made by adhesion, but in this case, it is possible to prevent sliding and abrasion with the end portion of the core body and the elastic body attached to the end portion. It becomes possible.

  The elastic body is characterized by being disposed so as to surround an end portion of the core body. Thus, by surrounding the end portion of the core body with the elastic body, the contact area between the end portion of the core body and the elastic body is increased and stabilized, and the end portion of the base body to which the end portion of the core body is fitted is fixed. It is possible to prevent wear due to sliding contact with the fitting hole.

  The elastic body is characterized by being substantially filled between one end of the core body and a fitting hole into which one end of the core body is fitted. According to this, the elastic body is in a substantially hermetically sealed state in the fitting hole, and can improve the performance of following the movement and deformation such as the rotational motion of the supported body, or can support a high load. .

  The elastic body is composed of a first elastic body disposed on one end side of the core body and a second elastic body disposed on the other end side of the core body. In this way, by setting the elastic bodies individually at both ends of the core body, it is possible to obtain a sealed support structure with higher sealing performance on the first base side and the second base side.

  The first elastic body and the second elastic body that constitute the elastic body are configured integrally. As described above, when the first elastic body and the second elastic body are integrally formed, the entire outer surface of the core body can be surrounded by the elastic body by the elastic body, and the rust prevention effect of the core body In addition, it is possible to obtain a high sealing performance while securing the deformability of the elastic body accompanying relative displacement between the base and the core body.

  A third elastic body is disposed between the first base and the second base. By setting the third base in this way, in addition to the load supporting force of the core body, it becomes possible to elastically support the load on the first base and the second base around the core body, Interference between the first base and the second base that may occur is prevented.

  One or both of the first elastic body and the second elastic body are configured integrally with the third elastic body. By configuring in this way, it is possible to easily configure while expanding the bearing area, and it is possible to improve the deformability and sealing performance of the elastic body.

  The elastic body is characterized in that it is bonded to any one or more selected from the first base, the second base and the core by vulcanization adhesion or adhesive. In particular, when the elastic body is vulcanized and bonded to any of the first base, the second base, and the core, the manufacturing becomes easy and the durability can be improved.

  One or both of the first elastic body and the second elastic body are bonded to one or more selected from the first base, the second base, and the core by vulcanization adhesion or an adhesive. It is said. In particular, when the first elastic body is vulcanized and bonded to the first base and the core and the second elastic body is vulcanized and bonded to the second base and the core, the manufacturing becomes easy and the durability is improved. I can do it.

  The third elastic body is characterized in that it is bonded to one or more selected from the first base, the second base, and the core by vulcanization adhesion or an adhesive. In particular, when the third elastic body is vulcanized and bonded to the base or the core, the resistance against the shear load is remarkably improved and the separation between the first base and the second base is suppressed.

  The first elastic body and the second elastic body are characterized by being composed of different materials. According to this, for example, a material suitable for improving the vertical followability and rotation followability is set for one elastic body, and a highly elastic material is set for the other elastic body. As described above, the elastic material having different properties can be selected for the first elastic body and the second elastic body, and a single function can be realized with a single support device.

  Two or three selected from the first elastic body, the second elastic body, and the third elastic body are formed of different materials. Thus, different types of elastic materials including the third elastic body are set, for example, the third elastic body is made of an elastic material having good elastic deformability different from the first elastic body and the second elastic body, and the load It is possible to prevent the bases from colliding with each other, which may occur when the first base and the second base are rotationally displaced relative to each other, while being used as support.

  Also, a fitting hole or first base formed in one or both of the first elastic body, the second elastic body, and the third elastic body, or one or both of the first base and the second base A space in which any of the first elastic body, the second elastic body, and the third elastic body is not provided is set in the gap between the second base and the second base. In the case of having this space, when the elastic body is deformed by receiving a load, it is possible to enter the space, the allowable deformation amount of the elastic body can be increased, and the spring constant can be reduced. That is, the spring constant can be adjusted by providing the space.

  Further, the space is filled with a filler. Various functions such as the spring constant and height of the bearing device, load support performance, load damping performance, rotation follow-up performance in the vertical plane, etc., depending on the setting of the constituent material, filling amount, filling position, filling space shape, etc. And the performance can be adjusted.

  In addition, as a filler, for example, a first elastic body, a second elastic body, a third elastic body, etc., an elastic body or an incompressible fluid can be used, and the type of the filler can be selected. As described above, it is possible to adjust various functions and performances such as the spring constant and height of the support device, the load supporting performance, the load damping performance, and the rotation follow-up performance in the vertical plane.

  When a fluid is used as the filler, for example, it may be a fluid at the time of filling, but may be solidified after an appropriate time has elapsed. Moreover, the kind of filler with which one space is filled may be one kind or plural kinds. For example, a two-component curable fluid may be filled in an appropriate amount and cured to form a solid so as to develop an appropriate elastic coefficient. Of course, the two components are mixed in advance and then filled. You can also. Moreover, as a filler, you may mix the solid, the granule, and gas in the inside of the fluid.

  The filler can be composed of one or more fluids selected from gas, liquid and gel. Gas is unsuitable for supporting high loads because of its high compression ratio, but it can act like an air spring when supporting relatively low loads, and is filled in a pressurized state. May be. It is also possible to form a filler such as a foam by curing while filling and placing a fluid containing bubbles such as discontinuous bubbles. In addition, for example, when filled with a liquid or slurry-like or gel-like non-hardening filler, it is possible to support the load while freely supporting deformation of the filling space, and it can be used at low temperatures such as in cold regions. It is also possible to select an antifreeze fluid that does not freeze.

  When the filler is an incompressible fluid, it is possible to support a high load while freely responding to deformation of the filling space.

  When the filler is a liquid or a slurry or gel-like non-curing and highly viscous fluid, the highly viscous filler in the space when the elastic body surrounding the filling space is deformed. The effect of attenuating deformation energy by the viscous resistance of can be expected.

  Further, as described above, the filler can be a different kind of elastic body. Of course, in order for the filler to become an elastic body, it is convenient if it exhibits fluidity during filling. For example, if the elastic body exhibits thermoplasticity, when it is used as a filler, the elastic body is appropriately heated to a temperature and filled while being allowed to flow. For example, if an elastic body shows thermosetting property, it will be filled when it is in a flowable state before curing.

  When the filling material is filled in advance, it can be filled in accordance with the pre-design and according to the procedure before the production stage or before shipment, and according to this, high efficiency in production can be achieved.

  In addition, when filling the filler later, it is possible to fill it after shipment, for example, at the construction site, while adjusting according to the size of the construction space, etc. It is possible to solve the problems that were difficult to fine-tune in the construction.

  In addition, when adjusting the thickness or height of the support device according to the filling amount of the filler, the thickness or height of the support device can be adjusted depending on the amount of filling material with respect to the filling space. It will be possible to adapt more precisely to the construction space at.

  It is characterized in that there is a gap between the fitting hole of one or both of the first board and the second board and the outer peripheral surface of the fitting part of the core body fitted into the fitting hole. . In particular, when this gap is filled with an elastic body, the contact and sliding between the fitting hole and the core body are prevented, noise generation is prevented, and the durability of the bearing device is improved. It can be made.

  The number of fitting holes formed in both the first base and the second base is the same number and a plurality of fitting holes, and each of the fittings is composed of the second base fitting holes corresponding to the first base fitting holes. The number of cores is the same as the number of the fitting hole pairs, and one core is fitted into each of the fitting hole pairs. In this way, it is possible to use a plurality of core bodies instead of a single one. In this case, it is possible to support the dispersion in a distributed manner and to distribute the input load while tearing the individual core bodies with a time difference. Can also be absorbed.

  The total cross-sectional area of the minimum diameter part of all the core bodies to be set is set to 50% or more of the bearing area on one side of the bearing device. By configuring in this way, it becomes possible to set a large load value that can be supported by the core body, making it possible to support a high load with a smaller area and improving the strength of the core body. It is also possible.

  A sliding board is arranged on the upper part of the first base or the lower part of the second base. According to this, even if the bearing device of the present invention is configured as a fixed bearing, the bearing device can be used as a movable bearing only by disposing the sliding plate.

  According to the bearing device of the present invention, the core body fitted in the fitting holes formed in the first base plate and the second base plate, and the first base plate and the second base plate, respectively, and disposed on both ends thereof. With the configuration including the first elastic body and the second elastic body, it is possible to support a high load with a small support area.

  Moreover, even if a relative rotational displacement force acts on the first base and the second base due to the swing of the structure that is the supported body, the first base and the core, and the core and the second base By being able to rotate independently of each other, it becomes possible to follow with a large rotation as a whole while reducing the relative rotation amount of the first base and core and the core and second base individually. Excellent rotational tracking performance, such as damping the rotational force.

  Further, according to the support device of the present invention, since the end portions of the core body are fitted to the first base and the second base, respectively, the direction perpendicular to the axial direction of the core body with respect to the support device It is possible to limit the relative displacement between the first base and the second base within a predetermined range even if a shearing force of the above acts.

  Moreover, according to the support apparatus by this invention, the core which provided the large diameter part in the both ends respectively reduces the diameter gradually toward the board | substrate which opposes to each of a 1st board | substrate and a 2nd board | substrate. When the large-diameter portion is fitted so as to be engaged with each other, and the elastic body is disposed so as to surround both ends of the core body, a large load can be supported, and good rotational followability However, when a force that separates the first base and the second base is applied, it is possible to prevent a divergence between the first base and the second base.

  The elastic body fills the gap between the fitting hole and the core body end while surrounding the end of the core body to be inserted into the mating hole of the first board and the second board with the elastic body. When configured, the load bearing performance can be significantly improved, but it is possible to prevent contact between the first base and the second base and the core, and intrusion of rainwater, etc. When a metal material is used, it is possible to obtain a rust prevention effect.

It is a longitudinal cross-sectional view of the support apparatus of the 1st Example of this invention. It is a top view of the support apparatus which removed the upper obstruction | occlusion plate and the lower obstruction | occlusion plate from the support apparatus shown in FIG. It is a longitudinal cross-sectional view of the support apparatus of the 2nd Example of this invention. It is a longitudinal cross-sectional view of the support apparatus of the 3rd Example of this invention. It is a longitudinal cross-sectional view of the support apparatus of the 4th Example of this invention. It is a longitudinal cross-sectional view of the support apparatus of the 5th Example of this invention. It is a longitudinal cross-sectional view of the support apparatus of the 6th Example of this invention. (A) is the longitudinal cross-sectional view of the support apparatus of 7th Example of this invention, Comprising: The longitudinal cross-sectional view of the support apparatus comprised by arrange | positioning a sliding plate on the upper surface of an upper plate, (b) is the same. It is a longitudinal cross-sectional view of the support apparatus comprised by arrange | positioning a sliding plate in the lower surface of a lower plate.

  The configuration of the support device according to the embodiment of the present invention will be described in detail below. A bearing device according to the present invention is a bearing device for bearing a structure such as a building or a bridge, and is disposed on one structure side of two structures positioned with a gap therebetween. A first base, a second base disposed on the other side of the structure opposite to the first base, and at least one end engaged with the first base and the other end with the second base A core body and an elastic body disposed on both ends of the core body are provided. Here, for example, one of the above-described structures is an upper structure, and the other structure is a lower structure. As a more specific example, the support device of the present invention is used by being disposed between a bridge girder as an upper structure and a bridge pier as a lower structure, that is, between a bridge girder and a bridge pier. In some cases, it supports various loads such as horizontal loads, vertical loads, and rotational loads, and absorbs and disperses vibrations, vibrations, and stresses caused by earthquakes, winds, or dynamic or static traffic loads while performing load transmission. However, it will be supported. Hereinafter, an embodiment of the support device of the present invention will be described with an example in which it is used by being disposed between an upper structure and a lower structure.

  The support device includes at least an upper plate as a first base fixed directly or indirectly to the upper structure, a lower plate as a second base fixed directly or indirectly to the lower structure, and A core body whose end portions are respectively fitted to the upper plate and the lower plate and an elastic body respectively disposed on the end side of the core body are configured.

  The upper plate fixing means for the upper structure may be fixed directly to the upper structure using fastening means such as bolts and nuts, or a plate shape having a larger area than the upper plate. It is also possible to indirectly fix the upper plate to the upper structure through the upper fixing means such as the upper plate. Further, it is preferable that sliding means be disposed on the upper part of the upper plate so that the upper structure and the support device can be fixed relative to each other. As the sliding means, for example, a plate having a low coefficient of friction surface such as PTFE is fixed to the upper surface of the upper plate, or the lower surface on the mounting means side fixed to the upper structure or the upper structure. It is possible to constitute by fixing to.

  Similarly, the fixing means of the lower plate to the lower structure may be fixed directly to the lower structure using fastening means such as bolts and nuts, or a larger area than the lower plate. It is also possible to indirectly fix the lower plate to the lower structure through lower fixing means such as a lower plate having a plate shape. Further, it is preferable that sliding means is disposed below the lower plate to fix the lower structure and the support device so as to be capable of relative displacement. As the sliding means, for example, a plate having a low coefficient of friction surface such as PTFE is fixed to the lower surface of the lower plate, or the upper surface on the attachment means side fixed to the lower structure or the lower structure. It is possible to constitute by fixing to. As described above, in the bearing device of the present invention, when the sliding plate is disposed on at least one end portion of the upper plate or the lower plate and the sliding bearing surface is set, the bearing device is called a so-called function separation type movable bearing. Can also be used. The direct or indirect fixing of the upper plate or the lower plate is preferably a detachable method, and fastening with bolts, nuts, etc. is an example.

  The upper plate is preferably made of metal, ceramics, or a steel material such as hard resin or reinforced resin such as FRP, but is not necessarily limited to a rigid material. It can comprise by the material comprised by a combination. The upper plate made of an appropriate material can be set to a disk shape having an upper surface and a lower surface with 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 manufacturing, construction, and replacement to be square or circular. The upper plate can be configured so as to obtain a weather resistance and a rust prevention effect by covering the entire outer surface with a coating layer such as an elastic body.

  The upper plate has at least one fitting hole for fitting one end side of the core body. The set number of the fitting holes is preferably set to the same number corresponding to the fitting holes drilled in the lower plate, and the same number of cores is set with respect to the number of sets of the corresponding fitting holes. Is preferred. The fitting hole of the upper plate can be formed in a concave shape from at least the lower surface side of the upper plate, and the bottom can be set in the concave fitting hole. It is also possible to provide it. In providing the bottom portion in the fitting hole of the upper plate, the upper plate is made up of a plurality of members such as a plate with a hole that penetrates the fitting hole and a closing plate that closes the fitting hole that penetrates the upper plate. It is also possible to construct and close the closing plate on the holed plate and connect them together.

  The fitting hole of the upper plate is only required to be formed on the lower surface side so that one end of the core body can be fitted. It can be drilled to reduce the diameter from the side to the upper surface side, or can be drilled to increase the diameter from the lower surface side to the upper surface side, but set so that the core can be inserted. There is a need to. Preferably, a small-diameter hole portion having a relatively small diameter through which the core body can be inserted is provided on the lower surface side, and a large-diameter hole portion larger than the diameter of the small-diameter portion is provided at a portion larger than the small-diameter portion, and the end portion side of the core body is provided. The large-diameter portion to be provided can be inherent in the large-diameter hole portion constituting the fitting hole, and is configured to engage with the small-diameter hole portion and not fall off. The small-diameter hole portion and the large-diameter hole portion may be provided stepwise or may be provided continuously. That is, when the small-diameter hole and the large-diameter hole are provided continuously, the fitting hole of the upper plate has a conical tapered surface or a convex shape that continuously expands from the lower surface side toward the upper surface side. Or a curved surface curved in a concave shape.

  The bottom of the fitting hole that is recessed from the lower surface side of the upper plate, or the bottom of the fitting hole that is set by disposing the closing plate on the upper surface of the holed plate, is flat, Alternatively, it may be a convex curved surface shape or a concave curved surface shape, and is not particularly limited. It is possible to apply a core body having an end with a concave curved surface set corresponding to the above, and make the support device follow the rotation of the upper structure suitably while receiving a vertical load in a distributed manner I can do it. Similarly, when the bottom portion of the fitting hole of the upper plate is formed in a concave curved surface shape, it is possible to apply a core body having an end portion of a convex curved surface set corresponding to the concave curved surface. The bearing device can be made to suitably follow the rotation of the upper structure while receiving the dispersion in a distributed manner.

  Of course, the lower surface of the upper plate can be flat, or provided with a concave portion that is recessed from the lower surface side and / or a convex portion that protrudes toward the opposing base, or a rough surface or a curved surface. It is possible to use a tapered surface or a composite surface thereof. In particular, the inclined surface is set so that the thickness of the base decreases from the approximate center of the lower surface of the upper plate to the outside, or the base thickness increases from the approximate center to the outward. The inclined surface can be made. For example, while the lower surface of the upper plate is an inclined surface that reduces the thickness of the base from the approximate center to the outside, the upper surface of the lower plate is inclined that the thickness of the base is decreased from the approximate center to the outside. When the support device is configured in combination with the lower plate as a surface, an expanded space is created between the upper plate and the lower plate that is separated from the center in the radial outward direction. Therefore, when the third elastic body is disposed so as to fill this space, a support device in which the elastic layer becomes thicker from the center toward the outside can be obtained. On the contrary, while the lower surface of the upper plate is an inclined surface in which the thickness of the base increases from the approximate center to the outside, the thickness of the base increases from the approximate center to the outside of the upper surface of the lower plate. When the support device is configured in combination with the lower plate having an inclined surface, a constricted space is created between the upper plate and the lower plate that approaches radially outward from the center. Therefore, when the third elastic body is disposed so as to fill this space, it is possible to obtain a bearing device in which the elastic layer becomes thinner from the center toward the outside.

  The lower plate is preferably made of metal, ceramics, or a steel material such as a hard resin or a reinforced resin such as FRP, but is not necessarily limited to a rigid material. It can comprise by the material comprised by a combination. The lower plate made of an appropriate material can be set to a disk shape having an upper surface and a lower surface with 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 manufacturing, construction, and replacement to be square or circular. The lower plate can be configured so as to obtain a weather resistance and a rust prevention effect by covering the entire outer surface with a coating layer such as an elastic body.

  The lower plate has at least one fitting hole for fitting one end side of the core body. It is preferable to set the same number of fitting holes corresponding to the number of fitting holes drilled in the upper plate, and to set the same number of cores with respect to the number of sets of the corresponding fitting holes. Is preferred. The fitting hole of the lower plate can be formed in a concave shape from at least the upper surface side of the lower plate, and the bottom can be set in the concave fitting hole. It is also possible to provide it. In providing the bottom portion in the fitting hole of the lower plate, the lower plate is made of a plurality of members such as a plate with a hole that penetrates the fitting hole and a closing plate that closes the fitting hole that penetrates the lower plate. It is also possible to configure and close the closing plate below the plate with holes and couple them together.

  The fitting hole of the lower plate is only required to be formed on the upper surface side so that one end of the core body can be fitted. It can be drilled to reduce the diameter from the side to the lower surface side, or can be drilled to increase the diameter from the upper surface side to the lower surface side, but set so that the core can be inserted. There is a need to. Preferably, on the upper surface side, a relatively small-diameter small-diameter hole portion through which the core body can be inserted is provided, a large-diameter hole portion larger than the diameter of the small-diameter portion is provided in a portion below the small-diameter portion, and the end portion side of the core body is provided. The large-diameter portion to be provided can be inherent in the large-diameter hole portion constituting the fitting hole, and is configured to engage with the small-diameter hole portion so as not to be removed. The small-diameter hole portion and the large-diameter hole portion may be provided stepwise or may be provided continuously. That is, when a small-diameter hole and a large-diameter hole are provided continuously, the fitting hole of the upper plate has a conical tapered surface or a convex shape that continuously expands from the upper surface side toward the lower surface side. Or a curved surface curved in a concave shape.

  The bottom of the fitting hole that is recessed from the upper surface side of the lower plate, or the bottom of the fitting hole that is set by disposing the closing plate on the lower surface of the holed plate, is flat, Alternatively, it may be a convex curved surface shape or a concave curved surface shape, and is not particularly limited. It is possible to apply a core body having an end with a concave curved surface set in accordance with the above, and make the bearing device follow the rotation of the lower structure while receiving a vertical load in a distributed manner. I can do it. Similarly, when the bottom portion of the fitting hole of the lower plate is formed in a concave curved surface shape, it is possible to apply a core body having an end portion of a convex curved surface set corresponding to the concave curved surface, and a vertical load While being received in a distributed manner, the support device can be made to suitably follow the rotation of the lower structure.

  Of course, the lower surface of the lower plate can be flat, or provided with a concave portion that is recessed from the upper surface side and / or a convex portion that protrudes toward the opposite base, or a rough or curved surface. It is possible to use a tapered surface or a composite surface thereof. In particular, it is an inclined surface that is set so that the thickness of the base decreases from the approximate center of the upper surface of the lower plate to the outside, or is set so that the thickness of the base increases from the approximate center to the outside. The inclined surface can be made.

  The core body is fitted in the fitting hole of the upper plate at the upper end side and fitted in the fitting hole of the lower plate so that the core body can follow the rotational displacement of the supported body well. The lower plate is for restraining a relative displacement within a predetermined range with respect to at least one of the horizontal direction and the vertical direction, and for supporting a vertical load, preferably a fitting hole of the upper plate. And the same number corresponding to the number of sets of fitting holes formed by the fitting holes of the lower plate corresponding thereto.

  The core is preferably made of a steel 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 comprise by the material comprised by a combination.

  The cross-sectional shape of the core composed of an appropriate material is not particularly limited, but can be set to an appropriate shape such as a substantially polygonal shape, a substantially circular shape, a substantially long circular diameter, or a substantially elliptical shape. Moreover, it is possible to set the total cross-sectional area of the minimum diameter part of all the core bodies to be set to 50% or more of the bearing area on one side of the bearing device. The longitudinal cross-sectional shape of the core is not particularly limited, but can be set to a substantially rectangular shape, a substantially oval shape, or a shape in which at least one of the upper part and the lower part is large and the middle is thin. The core body can be configured so as to obtain a weather resistance and a rust prevention effect by covering the entire outer surface with a coating layer such as an elastic body.

  The core body can be provided with a large diameter portion in which one or both of the upper end side and the lower end side are set to have a large diameter. For example, the large-diameter portion is configured such that the fitting hole of the upper plate or the lower plate is set to be circular, and the fitting hole is formed along the outer peripheral surface near the end portion of the cylindrical core body having a diameter slightly smaller than the inner diameter. It is also possible to provide a large-diameter portion by providing an arc-shaped peripheral surface having an outer diameter substantially equal to the inner diameter. In this case, the core body slides like a piston in the vertical direction so that the fitting hole is a cylinder. The core can be smoothly rotated in the vertical plane without gaps by the arcuate circumferential surface that is movable and forms a part of the spherical surface. Therefore, when the support body is configured by disposing the elastic body beyond the end of the core body while fitting the end of the core body into the fitting hole, the elastic body is located inside the fitting hole. The sealing is in a sealed state, and the elastic body is stably maintained in the sealed state even with respect to the rotation of the core body in the vertical plane, and in addition to good rotation performance, a high load can be supported.

  The shape of the core is not limited to this, and it is possible to provide a large-diameter portion whose diameter is larger than the outer diameter of the intermediate portion on one end side or both end sides. The large diameter portion may have a stepped diameter increase as compared to the relatively small diameter diameter portion of the intermediate portion, or may be set so that the diameter gradually increases from the intermediate portion toward the end portion. It may be. Of course, when the diameter is continuously increased from the intermediate portion toward the upper and lower ends, the core body has a shape in which the intermediate portion is constricted. Moreover, the shape of the upper end part or the lower end part of the core body can be set to a desired shape such as a flat surface, a curved surface, in particular a convex curved surface, a concave curved surface, a rough surface, or an uneven surface.

  The core body can be composed of one or more, for example, two members. When the core body is composed of two members, for example, the core body is composed of an upper core body that forms an intermediate portion from the upper end side of the core body and a lower core body that forms an intermediate portion from the lower end side of the core body. I can do it. In this case, it is preferable to set coupling means that can be coupled to each other in each intermediate portion, and one core body may be configured by coupling the coupling means to each other. As a coupling means for coupling the upper core body and the lower core body constituting the core body, for example, one can be a male screw and the other can be a female screw that can be screwed with the male screw.

  When the upper and lower ends of the core body have a large diameter part or an enlarged diameter part, the core body is inserted and fitted into a fitting hole having a small diameter hole part smaller than the outer diameter of the large diameter part or the enlarged diameter part. In this case, the core body cannot be inserted and fitted by the large diameter part or the enlarged diameter part at both the upper and lower ends. However, if the intermediate part coupled by the coupling means is detached, the middle part having a relatively small diameter can be used. In addition to being able to pass the part through the small-diameter hole, in this way, when the upper core body and the lower core body are joined once inserted through the fitting hole, the core body is in any direction Since it cannot be removed from the fitting hole, it is possible to obtain an effect of preventing the removal, or to keep the vertical displacement and the horizontal relative displacement between the upper plate and the lower plate within a certain range.

  The elastic body is disposed at least on both upper and lower ends of the core body. Depending on the arrangement and amount of the elastic body, it is possible to adjust the vertical load support performance and rotation follow-up performance. Of course, the load support performance and the rotation follow-up property can be set also by the material employed as the elastic body. When the elastic body is disposed at the end of the core body, it is preferable to connect the elastic body to the end of the core body, but the elastic body may or may not be bonded. However, it is preferably bonded to each of the upper and lower eyelids by vulcanization adhesion or adhesive bonding, etc., and the elastic body does not separate or peel off due to stress concentration or secular change, etc. It is necessary to do so. Of course, the method for adhering the elastic body to the upper and lower eyelids is not particularly limited. The core body is preferably disposed at the end of the end portion of the core body, and more preferably, the elastic body is disposed so that the end portion of the core body is surrounded by the elastic body. Further, a gap may be provided between one or both of the fitting holes of the upper plate and the lower plate and the outer peripheral surface of the fitting portion of the core body fitted in the fitting hole. The elastic body can be substantially filled between one end of the core body and a fitting hole into which one end of the core body is fitted. By setting in this way, it becomes possible to support a larger vertical load, and while obtaining good rotation followability, it is possible to prevent the upper plate or lower plate and the core body from colliding or sliding, In addition to improving durability, it is possible to prevent rainwater and the like from entering between the fitting hole and the core body.

  When the elastic body disposed on the upper end side of the core body is the first elastic body and the elastic body disposed on the lower end side of the core body is the second elastic body, these first elastic body and second elastic body Can be made of the same kind of elastic material, or can be made of different kinds of elastic material. The first elastic body and the second elastic body may be configured integrally with each other.

  In addition to the first elastic body and the second elastic body, a third elastic body can be set between the upper plate and the lower plate as the elastic body. Of course, one or both of the first elastic body and the second elastic body may be integrally formed with the third elastic body. Further, the third elastic body may be simply disposed in an unbonded state between the upper plate and the lower plate, or may be bonded by vulcanization bonding or an adhesive. Further, the third elastic body can be bonded to the core body.

  The first elastic body, the second elastic body, and the third elastic body can be formed of the same type of elastic body, and two or three selected from these can be formed of different materials. Is also possible.

  Natural elastomers, synthetic rubbers, thermoplastic elastomers and thermosetting elastomers can be used as the elastomer as the main constituent material of the elastic body, and among these, natural rubber is preferably used as the main component. Specific examples of the elastomer component include 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 Elastomers, urethane elastomers, polyolefin elastomers, acrylonitrile-butadiene rubber (NBR), styrene / isoprene / styrene block copolymer (SIS), epoxidized natural rubber, trans-polyisoprene, nor Runen ring-opening polymer (polynorbornene), styrene-butadiene rubber (SBR), high styrene resins, rubber alone such as isoprene rubber, or may be used in combination of two or more.

  Also, a fitting hole or an upper plate and a lower plate formed in one or both of the first elastic body, the second elastic body, and the third elastic body, or one or both of the upper plate and the lower plate In the gap, a space in which any of the first elastic body, the second elastic body, and the third elastic body is not provided can be set, and in this case, this space can be set like air or nitrogen gas. It is also possible to enclose the gas to form a void. Alternatively, the first elastic body, the second elastic body, or an elastic body of a different type or the same type as the third elastic body may be disposed in the space, or another filler may be filled. . When dissimilar or similar elastic bodies are disposed in this space, these elastic bodies may not be bonded to each other, for example, may be provided with an appropriate interval between them, in this case, In addition to facilitating horizontal deformation, the elastic body located between the side surfaces of the opposing convex portions and the elastic body located between the upper portion of the convex portion and the bottom portion of the concave portion independently have the respective characteristics It will be possible to demonstrate.

  The space may be one or a plurality of spaces, or may be set within a certain narrow range, or may be intermittently set over a wide area. By making it into a series, it becomes possible to improve the ease of filling a filler or the like.

  The filling material is appropriately filled in the above-described space, that is, the filling space, and the filling amount is smaller, equal or larger than the volume of the filling space. In the case of a small amount, there is room for compression or deformation by the amount of the remaining gap, and the thickness of the bearing device can be set thin, and in the case of equal amounts, there is no remaining volume and the bearing as originally designed. If the thickness of the device can be realized or increased, the volume of the filling space can be increased from the original design value, and the thickness of the support device can be set thicker. The thickness or height can be adjusted.

  The filler is preferably a fluid at least during filling. Of course, it may be a fluid after filling. Among the fillers that are fluids at the time of filling, for example, those that are fluids at the time of filling but solidify after an appropriate amount of time can be employed. Moreover, the kind of filler with which one space is filled may be one kind or plural kinds. For example, an appropriate amount of each of the two-component curable fluids may be filled and cured to form one solid so as to express an appropriate elastic modulus. Of course, the two components should be mixed before filling. You can also. In addition, as a filler, solid or particles are mixed in the fluid to improve the attenuation performance of the external input to the support device, or gas is mixed to improve or adjust the spring constant and elasticity. Also good.

  The filler can be composed of one or more fluids selected from gas, liquid, and gel. When gas is used as the main component of the filler, the gas is unsuitable for high load support because of its large compressibility, but when supporting a relatively low load, for example, an action like an air spring is performed. It is also possible to fill it in a pressurized state. It is also possible to form a filler such as a foam by curing while filling and placing a fluid containing bubbles such as discontinuous bubbles. In addition, for example, when a liquid or slurry-like or gel-like non-curable fluid is adopted as the main component of the filler, it is possible to support the load while freely supporting deformation of the filling space, It is also possible to select an antifreeze fluid that does not freeze even at low temperatures such as in cold regions.

  An incompressible fluid can be used as the filler, and when an incompressible fluid is used as the filler, a high load is supported while freely adapting to deformation of the filling space. It becomes possible.

  It is also possible to use a high-viscosity fluid as the filler. When a non-hardening high-viscosity filler such as liquid or slurry or gel is filled, the elastic body surrounding the filling space is deformed. In this case, it can be expected that the highly viscous filler in the space attenuates deformation energy by viscous resistance. Of course, when a highly viscous fluid with incompressibility is used, the effect obtained when an incompressible fluid is used as a filler and the effect obtained when a highly viscous fluid is used as a filler. Both effects can be obtained.

  Alternatively, the first elastic body, the second elastic body, or an elastic body that is different or the same type as the third elastic body can be used as the filler. Of course, in order for the filler to become an elastic body, it is preferable that the filler exhibits fluidity at the time of filling. For example, if the elastic body exhibits thermoplasticity, when it is used as a filler, the elastic body is appropriately heated to a temperature and filled while being allowed to flow. Further, for example, if the elastic body exhibits thermosetting property, it is filled at the time when it is in a flowable state before being cured, and is cured under appropriate conditions.

  The filling of the filler may be performed in advance or may be performed after manufacture. In the case of filling the filler in advance, the filling of the filler is performed in accordance with the pre-design and the procedure according to the manufacturing stage and before the shipment, and according to this, the manufacturing efficiency can be improved. . In addition, when filling the filler later, it is also possible to fill the filler after the shipment, for example, at the construction site while adjusting to the size of the construction space, etc. According to the above, it is possible to solve the problem that fine adjustment in the conventional construction is difficult.

  The support device of the present invention can be configured as described above, but the setting of each part can be appropriately changed without departing from the gist of the present invention.

Example 1
A support device according to an embodiment of the present invention is described below with reference to the accompanying drawings. First, a support device according to a first embodiment of the present invention will be described with reference to FIGS.

  A support device 101 shown in FIG. 1 is for a bridge that is installed between a bridge girder (not shown) and a pier (not shown), for example, in a bridge to support a load and reduce vibration caused by an earthquake or wind. The bearing device of the present invention is applied as the bearing device.

  The support device 101 includes an upper plate 110, a lower plate 120, a core body 130, and an elastic body 140 interposed between them.

  The upper plate 110 includes, as an upper structure, a rectangular plate-like upper closing plate 111 that is fixed to a bridge girder of a bridge, for example, and an upper holed plate 112 that is integrated with the lower surface of the upper closing plate 111. That is, the upper closing plate 111 is a member for fixing the support device 101 to the upper structure while closing the fitting hole 112a of the plate 112 with the upper hole.

  The upper closing plate 111 in this embodiment is formed in a substantially rectangular plate shape using a metal containing an alloy, ceramics, a high-strength plastic containing FRP, or a composite material thereof, and the upper surface side is an upper structure. The contact surface with respect to the body is used, and the lower surface side is the contact surface with respect to the plate 112 with the upper hole. Further, the outer peripheral surface of the upper closing plate 111 may be provided with a coating layer mainly composed of an elastic body or resin to have a rust prevention effect. Arrangement means for the upper structure of the upper closing plate 111 is not particularly limited. For example, a bolt insertion hole 111a is formed at an appropriate position of the upper closing plate 111 and attached using bolts, nuts, or the like. It can be configured as follows. Further, the means for fixing the upper closing plate 111 to the upper holed plate 112 is not particularly limited. For example, a bolt insertion hole 111b is formed at an appropriate position of the upper closing plate 111, and a bolt, a nut, or the like is provided. It may be configured to be used and attached by welding or the like. When the upper blocking plate 111 and the upper holed plate 112 are coupled to each other, recesses (not shown) are formed in the appropriate opposing portions, and shearing keys (not shown) are inserted into both the recesses to shear. You may comprise so that intensity | strength may be reinforced.

  The upper holed plate 112 is formed in a substantially circular plate shape using a metal including an alloy, ceramics, a high-strength plastic including FRP, or the like, or a composite material thereof. It is a contact surface with respect to the lower surface, and is fixed at the center of the lower surface of the upper closing plate 111. Further, the outer peripheral surface of the upper holed plate 112 may be provided with a coating layer mainly composed of an elastic body or a resin to have a rust prevention effect. Bolt insertion holes 112b corresponding to the bolt insertion holes 111b are provided at appropriate positions on the upper holed plate 112. A frustoconical fitting hole 112a having a reduced diameter from the upper surface side toward the lower surface side is provided in the center of the upper holed plate 112 so that the upper half of the core body 130 is contained.

  The lower closing plate 121 is formed in a substantially rectangular plate shape using a metal including an alloy, ceramics, a high-strength plastic including FRP, or a composite material thereof, and the lower surface side is in contact with the lower structure. The upper surface side is a contact surface with respect to the lower holed plate 122. Further, the outer peripheral surface of the lower closing plate 121 may be provided with a coating layer mainly composed of an elastic body or resin to have a rust prevention effect. The disposing means for the lower closing plate 121 with respect to the lower structure is not particularly limited. For example, a bolt insertion hole 121a is drilled at an appropriate position of the lower closing plate 121 and attached using bolts, nuts, or the like. It can be configured as follows. The fixing means for the lower closing plate 121 with respect to the lower holed plate 122 is not particularly limited. For example, a bolt insertion hole 121b is drilled at an appropriate position of the lower closing plate 121, and bolts, nuts, etc. It may be configured to be used and attached by welding or the like. When the lower closing plate 121 and the lower holed plate 122 are coupled to each other, recesses (not shown) are formed in appropriate facing portions, and shearing keys (not shown) are inserted into both the recesses to perform shearing. You may comprise so that intensity | strength may be reinforced.

  The lower holed plate 122 is formed in a substantially circular plate shape using a metal including an alloy, ceramics, a high-strength plastic including FRP, or the like, or a composite material thereof. It is a contact surface with respect to the lower surface, and is fixed at the center of the upper surface of the lower closing plate 121. Further, the outer peripheral surface of the lower holed plate 122 may be provided with a coating layer mainly composed of an elastic body or a resin to have a rust prevention effect. Bolt insertion holes 122b corresponding to the bolt insertion holes 121b are provided at appropriate positions on the plate 122 with the lower holes. A frustoconical fitting hole 122a having a diameter reduced from the lower surface side toward the upper surface side is provided in the center of the lower holed plate 122 so that the lower half portion of the core body 130 is contained.

  The core body 130 is made of a metal including an alloy, ceramics, high-strength plastic including FRP, or the like, or a composite material thereof, and an upper core that extends from a substantially middle position in the height direction to the upper end. It is composed of two members, a body 131 and a lower core body 132 that extends from a substantially intermediate position in the height direction to the lower end. The joint portions of the upper core body 131 and the lower core body 132 are provided with coupling means, and are integrated by coupling the coupling means to each other.

  The upper core body 131 is formed in a substantially inverted truncated cone shape whose radius gradually increases from the lower end portion corresponding to the substantially central portion in the height direction of the core body 130 to the upper end portion, and the lower end portion has a concave shape from the lower end surface. A female screw part 131a is provided.

  The lower core body 132 is formed in a substantially truncated cone shape whose radius gradually increases from the upper end portion corresponding to the substantially central portion in the height direction of the core body 130 to the lower end portion, and the upper end portion is convex from the upper end surface. A male screw portion 132a is provided. The male screw portion 132 a is configured to be able to be screwed and fastened to a female screw portion 131 a provided on the lower end surface of the upper core body 131.

  The elastic body 140 of the present embodiment includes a first elastic body 141 disposed in a fitting hole 112a formed in a plate 112 with an upper hole in which an upper portion of an upper core body 131 is embedded, and a lower core body. Between the second elastic body 142 disposed in the fitting hole 122a formed in the lower holed plate 122 in which the lower part of 132 is provided, and between the upper holed plate 112 and the lower holed plate 122. The third elastic body 143 disposed in the gap is provided in series.

  These elastic bodies 140 can be formed using natural rubber, synthetic rubber, thermoplastic elastomer or thermosetting elastomer. Specifically, examples of the elastomer component include natural rubber, polyisoprene rubber, and polybutadiene. Rubber, styrene-butadiene rubber, chloroprene rubber, ethylene-propylene rubber, butyl rubber, halogenated butyl rubber (brominated, chlorinated, etc.), acrylic rubber, polyurethane, silicone rubber, fluorinated rubber, polysulfide rubber, hypalon, ethylene vinyl acetate rubber , Epichlorohydrin rubber, ethylene-methyl acrylate copolymer, styrene elastomer, urethane elastomer, polyolefin elastomer, acrylonitrile-butadiene rubber, styrene / isoprene / styrene block copolymer, epoxidation Natural rubber, trans- polyisoprene, polynorbornene ring-opened polymer (polynorbornene), styrene-butadiene rubber, high styrene resin, rubber alone such as isoprene rubber, or may be used in combination of two or more. Of course, any two or more of the first elastic body 141, the second elastic body 142, and the third elastic body 143 can be formed of the same material.

  The first elastic body 141 surrounds the upper portion of the upper core body 131, fills the inside of the fitting hole 112a of the plate 112 with the upper hole, is closed by the upper closing plate 111, and is almost sealed. Between the opening on the lower end side of the upper holed plate 112 and the outer peripheral surface of the upper core body 131 corresponding to this portion, a gap is provided in a circular shape, and this gap is also filled with the first elastic body 141, The third elastic body 143 provided immediately below is arranged in series. The first elastic body 141 may not be bonded to the upper plate 110 and the third elastic body 143, but may be fixed by vulcanization bonding or an adhesive.

  The second elastic body 142 surrounds the lower portion of the lower core body 132, fills the inside of the fitting hole 122 a of the lower holed plate 122, is closed by the lower closing plate 121, and is almost sealed. Between the opening on the lower end side of the lower holed plate 122 and the outer peripheral surface of the lower core body 132 corresponding to this part, a gap is provided in a circular shape, and this gap is also filled with the second elastic body 142, The third elastic body 143 provided immediately below is arranged in series. The second elastic body 142 may not be bonded to the lower plate 120 or the third elastic body 143, but may be fixed using vulcanization adhesion or an adhesive.

  The third elastic body 143 is disposed between the upper holed plate 112 and the lower holed plate 122 while surrounding the outer peripheral surface of the intermediate part of the core body 130. The third elastic body 143 may not be bonded to the upper holed plate 112 and the lower holed plate 122, or to the first elastic body 141 and the second elastic body 142. Or may be fixed by an adhesive.

  The bearing device 101 of the present embodiment is configured as described above, and it is possible to contribute almost the entire area of the plane of the bearing device 101 to support the vertical downward load, and the first elastic body 141. Since each of the second elastic bodies 142 has a sealed rubber support structure in which the seals are almost sealed, it is possible to support a large vertical downward load even when the size of the support device is small. Furthermore, by providing the third elastic body 143 that supports the upper plate 110 and the lower plate 120 while surrounding the periphery of the central portion of the core body, the vertical load support performance is reinforced and the vertical plane is supported. When following the rotation, it is possible to elastically support the rotational force.

  In addition, since the core body 130 is engaged with each of the upper plate 110 and the lower plate 120 so as not to be removable, the lower half of the first elastic body 141 can be applied even when the lifting force is applied to the support device 101. Displacement of the upper plate 110 and the lower elastic plate 142 is limited while the upper lift force is absorbed and dispersed in the upper half of the second elastic body 142 and the upper plate 110 and the lower plate 120 are separated.

  Similarly, when the support device 101 is rotated in the vertical plane, the rotational displacement is limited by the engagement of the core body 130 with the upper plate 110 and the lower plate 120. In particular, since the core body 130 has a configuration independent of the upper plate 110 and the lower plate 120, the independent relative rotation of the upper plate 110 and the lower plate 120 is smoothly performed. Therefore, when the rotational force in the vertical plane from the bridge acts on the support device 101, the upper plate 110 and the lower plate 120 rotate independently relative to the core body 130, and these upper portions Even if the individual rotation angles with respect to the rotational movement of the bridge etc. in the vertical plane of the plate 110 and the lower plate 120 are small, the overall rotation is large, so that smooth and high follow-up performance can be exhibited. It becomes possible.

  Further, the core body 130 also serves as a displacement limit when relative displacement between the upper plate 110 and the lower plate 120 in the horizontal direction occurs, and the horizontal force of a predetermined amount or more is elastically applied to the horizontal force. This can be prevented while being attenuated.

  The bearing device of the present invention is not limited to the bearing device 101 according to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. Hereinafter, other examples and modifications of the present invention will be described, but descriptions of parts and components that are the same as or similar to those of the above-described embodiment will be omitted.

(Example 2)
Next, a support device 201 according to a second embodiment of the present invention will be described with reference to FIG. As shown in FIG. 3, the support device 201 of this embodiment includes an upper plate 210 including an upper closing plate 211 and an upper holed plate 212, and a lower plate 220 including a lower closing plate 221 and a lower holed plate 222. A core body 230 including an upper core body 231 and a lower core body 232, a first elastic body 241 disposed in a fitting hole 212a formed in the upper hole plate 212, and a lower hole plate The second elastic body 242 disposed in the fitting hole 222a formed in the hole 222, and the third elastic body 243 disposed between the upper holed plate 212 and the lower holed plate 222. Has been.

  At the center of the lower surface of the upper blocking plate 211, there is a curved portion 211c recessed in a bay shape from the lower surface side corresponding to the diameter of the fitting hole 212a penetrating in the center of the plate 212 with the upper hole. When the blocking plate 211 and the upper holed plate 212 are joined, a curved space connected to the fitting hole 212a is formed.

  The fitting hole 212a penetrating through the upper holed plate 212 is configured to be concavely curved with the radius gradually increasing from the lower surface side toward the upper surface side.

  At the center of the lower surface of the lower closing plate 221, there is a curved portion 221 c that is recessed in a bay shape from the lower surface side corresponding to the diameter of the fitting hole 222 a that penetrates the center of the plate 222 with the lower hole. When the closing plate 221 and the lower holed plate 222 are joined, a curved space connected to the fitting hole 222a is formed.

  The fitting hole 222a penetrating through the lower holed plate 222 is configured to be concavely curved with the radius gradually increasing from the upper surface side toward the lower surface side.

  The upper end surface of the upper core body 231 constituting the core body 230 is formed in a convex curved surface shape, and the lower end surface of the lower core body 232 is formed in a convex curved surface shape.

  The first elastic body 241 is filled in the gap between the curved space including the fitting hole 212a and the upper core body 231 with no gap. Similarly, the second elastic body 242 is filled with no gap in the gap between the curved space including the fitting hole 222a and the lower core body 232.

  As described above, in the support device 201 of the present embodiment, the upper end of the core body 230 is formed in a convex curved shape, and the curved portion 211c of the upper plate 210 that receives this is along the convex curved surface of the upper end of the core body 230. A concave curved surface is formed. Similarly, the lower end of the core body 230 is formed into a convex curved surface, and the curved portion 221c of the lower plate 220 that receives the concave curved surface is formed along the convex curved surface at the lower end of the core body 230. As a result, the relative rotation between the upper plate 210 and the lower plate 220 in the vertical plane is performed smoothly.

Example 3
Next, a support device 301 according to a third embodiment of the present invention will be described with reference to FIG. As shown in FIG. 4, in the support device 301 of this embodiment, a hollow filling space 341a having no elastic body is formed in the center of the first elastic body 341, and the inside of the filling space 341a is not compressed. And antifreeze fluid is filled as the filler 341b. Similarly, the second elastic body 342 is formed with a hollow filling space 342a having no elastic body at the center of the inside thereof, and an incompressible and antifreeze fluid is filled in the filling space 342a with the filling material 342b. As charged.

  The bearing device 301 of the present embodiment has a large vertical downward load because the fillers 341b and 342b, which are incompressible fluids, are filled in the center of the first elastic body 341 and the second elastic body 342. Further, when the upper plate 310 and the lower plate 320 are rotated relative to each other in the vertical plane, the filling material is deformed to an optimum state while maintaining a constant volume. The bearing device 301 is remarkably good.

Example 4
Next, a support device 401 according to a fourth embodiment of the present invention will be described with reference to FIG. In the support device 401 of the present embodiment, the fitting hole 412a that penetrates the plate 412 with an upper hole forms a columnar shape, and the fitting hole 422a that penetrates the plate 422 with a lower hole similarly has a columnar shape. It is supposed to be made. In these cylindrical fitting holes 412a and 422a, the upper end side and the lower end side of the core body 430 formed in a columnar shape are respectively inserted and fitted. This fitting state is configured to be slidable like sliding of a piston and a cylinder. Between the inner peripheral surface of the fitting hole 412 and the outer peripheral surface of the core body 430, and between the inner peripheral surface of the fitting hole 422 and the outer peripheral surface of the core body 430, the upper plate 410 and the lower plate 420 A slight gap is set so that relative rotation in the vertical plane is possible. The sealing ring bodies 430a and 430a are engaged with appropriate portions on the upper side and lower side of the core body 430 in order to seal the overflow of the first elastic body 441 and the second elastic body 442 from the gap, respectively. Has been.

  A first elastic body 441 is disposed between the upper end of the core body 430 and the upper closing plate 411 inside the fitting hole 412 a penetrating the plate 412 with an upper hole. Similarly, a second elastic body 442 is disposed between the lower end of the core body 430 and the lower closing plate 411 inside the fitting hole 422a that is penetrated through the plate 422 with a lower hole. The thicknesses of the first elastic body 441 and the second elastic body 442 are appropriately set. In contrast, the thickness of the third elastic body 443 disposed between the upper holed plate 412 and the lower holed plate 422 is the sum of the thickness of the first elastic body and the thickness of the second elastic body. The thickness is set. Here, the 1st elastic body 441, the 2nd elastic body 442, and the 3rd elastic body 443 are comprised by the equivalent elastic material.

  As described above, the bearing device 401 according to the present embodiment is set so that the inner diameter of the fitting hole 412, the inner diameter of the fitting hole 422, and the outer diameter of the core body 430 are set to be substantially equal. Since the core body 430 functions like a shear key even if there is an input, the upper plate 410 and the lower plate 420 hardly generate relative horizontal displacement. Therefore, the support device 401 can restrain the horizontal displacement.

  In the support device 401, the third elastic body 443 is made of the same material as the constituent material of the first elastic body 441 and the second elastic body 442, and the thickness thereof is the first elastic body 441 and the second elastic body. Since the thickness of 442 is set to the total thickness, the amount of compression of the first elastic body 441 and the amount of compression of the second elastic body 442 resulting from compression by a vertically downward load are added together. Since the amount of compression and the amount by which the third elastic body 443 is compressed are substantially equal, the entire bearing surface becomes a substantially equal amount of compression, and it is possible to enhance the support performance of the vertical load.

  As a modification of the above-described fourth embodiment, the core body can be formed in a barrel shape instead of a cylindrical shape, or can be set in a spherical shape. In this case, it is preferable to set the fitting hole 412a in a curved shape whose diameter is temporarily reduced from the lower end side to the upper end side, from the viewpoint of rotational followability, and similarly, the fitting hole 422a is temporarily reduced from the upper end side to the lower end side. Set to a curved radius.

(Example 5)
Next, a support device 501 according to a fifth embodiment of the present invention will be described with reference to FIG. As shown in FIG. 6, the support device 501 of this embodiment is basically configured in the same manner as the support device 401 of the fourth embodiment described above. The elastic body corresponding to the third elastic body 443 is not disposed between the upper holed plate 512 and the lower holed plate 522, and a space is provided.

  According to the support device 501 of the present embodiment, since no elastic body is provided between the upper plate 510 and the lower plate 520, between the upper plate 510 and the core body 530, and between the lower plate 520 and the core body. Even if the relative rotation in the independent vertical plane with the 530 is small, the overall rotation becomes smoother and a desired rotation angle can be easily obtained. The amount of elastic material used can be reduced as much as it is unnecessary, and processing costs such as bonding can be reduced.

(Example 6)
Next, a support device 601 according to a sixth embodiment of the present invention will be described with reference to FIG. As shown in FIG. 7, the support device 601 of the present embodiment has a series of steps in which the lower hole side plate 612 is opened with a relatively small diameter on the lower surface side and the upper surface side on the same axis is opened with a relatively large diameter. A fitting hole 612a is formed. Similarly, the lower holed plate 622 is provided with a series of fitting holes 622a having a stepped shape in which the upper surface side is opened with a relatively small diameter and the lower surface side in the coaxial shape is opened with a relatively large diameter.

  A head 632 of a core body 630 formed in a bolt shape is disposed in the fitting hole 622a, and the front end side of the bolt is set so as to be positioned in the fitting hole 612a. The outer diameter of the head 632 is set larger than the inner diameter of the stepped portion of the fitting hole 622a, that is, the opening on the upper surface side of the fitting hole 612a, and smaller than the inner diameter of the opening on the lower surface side.

  The fitting hole 612a is provided with a nut-shaped upper core body 631 that is screwed into the tip of the bolt located inside, that is, the upper end of the core body 630. The maximum outer diameter of the nut-shaped upper core body 631 is set larger than the inner diameter of the opening on the lower end side of the fitting hole 612a and smaller than the inner diameter of the opening on the upper end side.

  As described above, according to the support device 601 of the present embodiment, as in the support device 1 of the first embodiment, a vertical load such as a bridge can be supported on almost the entire plane of the support device 601. It becomes possible to support a large vertical downward load. Moreover, even if a horizontal load is generated, the relative horizontal displacement can be stopped within a certain range by the bolt-shaped core body 630 even when a horizontal shearing force is applied. Of course, since the upper core body 631 and the head part 632 constituting the core body 630 are engaged with the fitting holes 612a and the fitting holes 622a, the upper plate can be used even when the lifting force is applied to the support device 601. 610 and the lower plate 620 can be prevented from separating. Of course, since the core body 630 of the journal acceptance apparatus 601 is configured in a bolt / nut shape, it can be easily manufactured. For example, if a general-purpose product is used, the cost can be reduced.

  Further, although not shown, a plurality of sets of the fitting hole 612a, the fitting hole 622a, and the core body 630 may be set in one support device. In this case, for example, bolts constituting individual sets. -The nut-shaped core body may be a small-diameter product, and a general-purpose mass-produced product can be used, thereby further reducing the cost. In this case, not only cost reduction is realized, but, for example, an individual core body is individually subjected to a tensile force or a shear force in response to an external horizontal force input. Since the body breaks sequentially in advance, energy absorption occurs at each break, so that a buffering effect can be obtained.

(Example 7)
Next, a support device 701 according to a seventh embodiment of the present invention will be described with reference to FIG. As shown in FIG. 8A, the support device 701 of the present embodiment has a sliding plate 750 made of PTFE fixed on the upper surface of the upper plate 710, and slides with respect to the lower surface of the upper structure which is a supported body. Alternatively, it is set to be slidable. The sliding plate 750 is fixed not only on the upper surface of the upper plate 710 but also on the lower surface of the lower plate 720 as shown in FIG. It is also possible to set so as to be slidable or slidable relative to the upper surface of the lower structure. However, when setting the upper surface of the lower structure, it is preferable to set it on the upper surface of the upper plate 710 because the sliding property and sliding property due to wind and snow such as accumulation of dust and the like are likely to occur. .

  As described above, when sliding means such as the sliding plate 750 is set in the bearing device 701, the bearing device 701 of this embodiment can be used not only as a fixed bearing device but also as a movable bearing device. become.

101, 201, 301, 401, 501, 601, 701 Bearing device 110, 210, 310, 410, 510, 710 Upper plate 111, 211 Upper closing plate 112, 212, 412, 512, 612 Upper hole plate 112a, 122a 212a, 222a, 412a, 422a Fitting holes 120, 220, 320, 420, 520, 720 Lower plate 121, 221 Lower closing plate 122, 222, 422, 522, 622 Lower hole plate 130, 230, 430, 530 , 630 Core bodies 131, 231, 631 Upper core body 132, 232 Lower core body 140 Elastic bodies 141, 241, 341, 441 First elastic bodies 142, 242, 342, 442 Second elastic bodies 143, 243, 443 Third Elastic body 341a, 342a Filling space 341 a, 342b Filler 430a Sealing ring body 632 Head 750 Sliding plate

Claims (39)

The first foundation,
A second base disposed opposite to the first base at an appropriate interval;
One or more cores constituted by one or more members fitted to the first base on one end side and the second base on the other end side; and
An elastic body disposed on both end sides of the one end side and the other end side of the core body,
One end of the core is fitted into a fitting hole drilled in the first base, and the other end is fitted into a fitting hole drilled in the second base. apparatus.   The bearing device according to claim 1, wherein the core body has a large-diameter portion in which the one end side or the both end sides are set to have a large diameter.   The bearing device according to claim 1, wherein the core body has a diameter-expanding portion that expands from an appropriate intermediate portion toward one end or both ends.   The support device according to claim 1, wherein one end or both ends of the core body are formed in a curved shape.   The support device according to claim 4, wherein one end or both ends of the core body are formed in a substantially convex curved shape.   The support device according to claim 4, wherein one end or both ends of the core body are formed in a substantially concave curved surface shape.   The core body includes a first core body that forms an intermediate portion from one end side of the core body, and a second core body that forms an intermediate portion from the other end side of the core body, and each intermediate portion includes The supporting device according to claim 1, comprising a coupling means that can be coupled and configured by coupling the coupling means to each other.   One or both of the first base and the second base are composed of a holed board having a fitting hole therethrough and a closing board for closing the hole. The bearing device described in 1.   The support device according to claim 2, wherein the fitting hole of one or both of the first base and the second base has a small diameter hole portion having a smaller diameter than the large diameter portion of the core body.   10. The fitting hole of one or both of the first base and the second base is drilled with a reduced diameter toward the opposing base. Bearing device.   The support device according to claim 1, wherein the fitting hole of one or both of the first base and the second base has a bottom.   The support device according to claim 11, wherein the bottom portion of the fitting hole on one or both of the first base and the second base has a substantially planar shape or a curved shape.   The support device according to claim 11, wherein the bottom portion of the fitting hole of one or both of the first base and the second base has a convex curved surface shape or a concave curved surface shape.   The base surface facing the counterpart base of one or both of the first base and the second base is provided with a concave portion that is recessed toward the opposing base and / or a convex portion that protrudes toward the opposing base. The support device according to any one of claims 1 to 13, The supporting device according to any one of claims 1 to 14 , wherein a base surface facing one or both of the first base and the second base has a curved surface portion that forms a curved surface. The base surface facing the counterpart base of one or both of the first base and the second base is an inclined surface that is set so that the thickness of the base decreases from the center toward the outside. The bearing device according to any one of claims 1 to 15 . The base surface facing the counterpart base of one or both of the first base and the second base is an inclined surface that is set so that the thickness of the base increases from the approximate center toward the outside. The bearing device according to any one of claims 1 to 15 . The elastic body bearing apparatus according to any one of claims 1 to 17, characterized in that it is Se' an end of the core. The elastic body bearing apparatus according to any one of claims 1 to 18, characterized in that it is arranged to surround the end portion of the core body. The elastic body, one end of said core body, according to any one of claims 1 to 19, characterized in that it is substantially filled between the fitting hole one end of the core body is fitted Bearing device. The said elastic body is comprised from the 1st elastic body arrange | positioned at the one end side of the said core body, and the 2nd elastic body arrange | positioned at the other end side of the said core body. The support device according to any one of 1 to 20 . The supporting device according to claim 21 , wherein the first elastic body and the second elastic body constituting the elastic body are integrally formed. The bearing device according to any one of claims 1 to 22 , wherein a third elastic body is disposed between the first base and the second base. 24. The support device according to claim 23 , wherein one or both of the first elastic body and the second elastic body according to claim 21 or 22 are configured integrally with the third elastic body. . The elastic body includes a first base, second base, with respect to any one or more selected from core, any one of claims 1 to 24, characterized in that it is bonded by vulcanization to the adhesive The bearing device described in 1. One or both of the first elastic body and the second elastic body are bonded to one or more selected from the first base, the second base, and the core by vulcanization adhesion or an adhesive. The support device according to any one of claims 1 to 25 . The third elastic body, first base, second base, with respect to any one or more selected from the core, according to claim 1 to 26, characterized in that it is bonded by vulcanization to the adhesive The bearing device according to any one of the above. The supporting device according to any one of claims 21 to 27 , wherein the first elastic body and the second elastic body are made of different materials. The supporting device according to any one of claims 23 to 27 , wherein two or three selected from the first elastic body, the second elastic body, and the third elastic body are made of different materials. . There is a gap between the fitting hole of one or both of the first base and the second base and the outer peripheral surface of the fitting portion of the core body fitted in the fitting hole. 30. The bearing device according to any one of claims 1 to 29 . The number of the fitting holes to be drilled in both the first base and the second base is set to be the same number and plural, and the fitting of the second base corresponding to the fitting holes of the first base For each of the fitting hole pairs formed of holes, the number of the core bodies is the same as the number of the fitting hole pairs, and the core bodies are fitted one by one to each of the fitting hole pairs. The support device according to any one of claims 1 to 30 , wherein the support device is provided. The total cross-sectional area of the minimum diameter part of all the said core bodies set is set to 50% or more of the bearing area of the single side | surface side of the said bearing apparatus, The one of Claim 1 thru | or 31 characterized by the above-mentioned. Bearing device. The support device according to any one of claims 1 to 32 , wherein a sliding plate is disposed on an upper portion of the first base or a lower portion of the second base. The support device according to any one of claims 1 to 33 , wherein a space in which the elastic body is not provided is provided in the fitting hole or in the elastic body. The support device according to claim 34 , wherein the space is filled with a filler. 36. The bearing device according to claim 35 , wherein the filler is an elastic material different from the elastic body. 37. The bearing device according to claim 35 or 36 , wherein the filler is an incompressible fluid. The support device according to any one of claims 35 to 37 , wherein the filler is filled in advance before the fitting hole and the core are fitted together. The filler bearing device according to any one of claims 35 to 37, characterized in that it is filled after fitting the said core body and said fitting hole.

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