JP2009013773A - Function separated vulcanizing integrally-molded bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an integrally-molded elastic bearing which is integrated by vulcanizing integral molding, while functions of upper and lower elastic layers are separated. <P>SOLUTION: While shearing strain is constrained at one side of top and down surfaces of a middle separation steel plate 7 located at the middle of upper and lower directions, an elastic bearing layer for rotation 3 which permits rotation in a vertical direction because of a bend of superstructure 30 and an elastic body 4 for shearing bearing which permits and bears shearing strain in a horizontal direction at the other side of the middle separation steel plate 7 are adhered by vulcanizing integral molding. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a bearing device interposed between a lower structure such as a pier or an abutment and an upper structure such as a bridge or a girder, and in particular, separates the functions of upper and lower elastic layers in an elastic bearing and is compact. The present invention relates to an elastic bearing of an integrated function separation vulcanization integrated type.

2. Description of the Related Art Conventionally, there has been known a bearing device configured such that independent upper and lower bearings having different functions can be assembled by bolts or the like (for example, see Patent Document 1).
JP-A-11-303016

In the case of the conventional case, since it is assembled with bolts or the like, a holding member for restraining the independent elastic bearings from moving laterally is required, or the upper and lower independent bearings are fixed with bolts. When the detachment occurs, there is a risk of separation, and the structure becomes complicated, resulting in high processing costs and high manufacturing costs.
The present invention provides an elastic bearing that elastically supports the upper structure with a buffer, a rotational bearing function that supports the bending of the girder, and the expansion and contraction of the girder due to a constant temperature change or the horizontal girder during an earthquake. Elastic support can be made smaller, cheaper and easier by structurally simplifying both the functions of the distributed support function that cushions the movement in the horizontal direction by shear deformation in the direction of the bridge axis of the elastic layer An object of the present invention is to provide an integrated elastic bearing in which the functions of the upper and lower elastic layers are made separate and integrated by vulcanization integrated molding.

In order to advantageously solve the above-described problem, in the functionally separated vulcanized integrated bearing of the first invention, shear deformation is restrained on one side of the upper and lower surfaces of the intermediate partition steel plate located in the middle in the vertical direction. A resilient elastic layer for rotation which is elastically supported by allowing vertical rotation due to deflection of the superstructure, and is supported on the other side of the intermediate partition steel plate by allowing horizontal shear deformation. Each of the bodies is fixed by vulcanization integral molding.
In the second invention, in the function-separated vulcanized integrated bearing according to the first invention, the elastic bearing layer for rotation is provided with a plate fixed by vulcanization integrated molding on the side opposite to the fixing surface with the intermediate partition steel plate. The plate is provided with an engaging portion that engages with a shear restraining projection provided on the intermediate partition steel plate, and the plate is engaged with the shear restraining projection provided on the intermediate partition steel plate to perform lateral movement. It is restrained.
In the third aspect of the invention, in the functionally separated vulcanized integral type bearing in the first or second aspect of the invention, a plate is formed by vulcanization integral molding on the side opposite to the fixing surface of the elastic body for shear bearing with the intermediate partition steel plate. Fixed,
The plate fixed to the elastic bearing layer for rotation, the intermediate partition steel plate, and the plate fixed to the elastic body for shear support are portions other than the fixing surface of the elastic bearing layer for rotation or the elastic body for shear support. Is provided with a coating layer formed by vulcanization integral molding.

According to the first invention, the following effects can be obtained.
(1) An elastic support layer for rotation that allows rotation due to bending of a girder and an elastic body for shear support that supports horizontal shear deformation are applied to one and the other of the upper and lower surfaces of the intermediate partition steel plate, respectively. Since it is fixed by sulfur integral molding, the elastic support layer for rotation and the elastic body for shear support can be securely fixed to the intermediate partition steel plate with a simple structure, and the support can be manufactured at low cost.
In addition, since the elastic support layer for rotation and the elastic support body for shear support are not separated from each other, it is not necessary to integrate them with bolts or the like as in the prior art. Can be reduced in size and weight, and accordingly, it can be easily transported and installed at low cost.
In addition, since the respective functions are separated by the elastic support layer for rotation and the elastic body for shear support partitioned by the intermediate partition steel plate, it is easy to design a support such as dispersion or seismic isolation.
(2) Since the elastic support layer for rotation provided so as to constrain shear deformation has a form that does not cause shear deformation, a high load in the vertical direction can be applied to the elastic layer, and the elastic body for shear support Since the single layer thickness of the elastic layer of the present invention is thin, a high load load is possible, and the function-separated vulcanized integrated type bearing according to the present invention can sufficiently load a high load. Therefore, not only can the apparatus be miniaturized, but the apparatus can be easily installed even when the plane installation dimension on the upper surface of the lower structure is small.
In addition, when such a function-separated vulcanized integrated type bearing is installed between the upper structure sole plate and the lower structure in the bridge, the shear deformation is constrained and the girder is allowed to rotate by allowing a minute rotation. In the elastic bearing layer, it is a fixed fulcrum that does not allow the movement of girders in the bridge axis direction, and has an elastic bearing body for shear support on the opposite side across the intermediate partition steel plate, so the direction of the bridge axis or the direction perpendicular to the bridge axis It is possible to exert a buffer bearing action due to horizontal shear deformation such as, etc., and can transmit while reducing the horizontal force to the lower structure or upper structure while slightly displacing the fixed elastic bearing device in the event of an earthquake, etc. It can function as an elastic bearing device. For this reason, when the apparatus of the present invention is installed on a lower structure such as a bridge pier constructed on hard ground or a fixed structure to support the upper structure, the burden of the bending moment acting on the lower structure is buffered. Can be reduced. Also, if the bending rigidity of the substructure such as the pier or abutment is not appropriate, or if the supporting ground is soft or hard ground, the elastic bearing device using the bearing body of the present invention during an earthquake etc. The bending moment acting on the substructure can be transmitted to the supporting ground while being moderately buffered.
According to the second invention, the elastic bearing layer for rotation includes a plate fixed by vulcanization integral molding on the opposite side to the fixing surface with the intermediate partition steel plate, and the plate is provided with the shear restraint provided on the intermediate partition steel plate. Since the plate is engaged with the shear restraining projection provided on the intermediate partition steel plate and the lateral movement is restrained, the elastic bearing for rotation has a simple structure. It is possible to restrain the shear deformation of the rotationally elastic bearing layer by restraining the lateral movement of the plate fixed to the layer.
According to a third aspect of the invention, a plate is fixed to the opposite side of the surface of the elastic body for shear support with the intermediate partition steel plate by vulcanization integral molding, and the plate is fixed to the elastic support layer for rotation, and the intermediate partition. Since the steel plate and the plate fixed to the elastic member for shear support are provided with a coating layer by vulcanization integral molding, except for the fixing surface of the elastic support layer for rotation or the elastic member for shear support, In other words, since the steel plate part in the functionally separated vulcanized integrated type bearing is covered with a coating layer formed by vulcanization integrated molding, it is surely covered with the coating layer formed by vulcanization integrated molding to prevent rust prevention of each steel plate. Even if there is some unevenness on the lower structure side or the upper structure side, it is possible to use the covering layer with the elastic layer under the lower plate or the covering layer with the elastic layer on the upper surface side of the upper plate. To adapt to the land, it can be supported.

  Next, the present invention will be described in detail based on the illustrated embodiment.

  1 to 3 show a function-separated vulcanization integrated type support 1 according to an embodiment of the present invention. FIGS. 4 to 6 show the function-separated vulcanization integrated type support 1 between upper and lower structures 30 and 34. The form used in is shown. FIG. 7 shows the upper bearing steel plate 8.

  In the form shown in the figure, as an upper device in the functionally separated vulcanized integrated support 1, rotation by bending of the girder 2 (see FIGS. 5 and 6) as the upper structure 30 is allowed, and shear deformation in the bridge axis direction is performed. The constrained elastic support layer 3 for rotation is fixed to the intermediate partition steel plate 7 by vulcanization integral molding, and as a device on the lower side, the rotation due to the bending of the girder 2 as the upper structure 30 is hardly allowed. A shear support elastic body 4 that mainly allows shear deformation in the direction is provided on the intermediate partition steel plate 7 by vulcanization integral molding.

  In the functionally separated vulcanized integrated type support 1 of the present invention, shear deformation is constrained on one side of the upper and lower surfaces of the intermediate partition steel plate 7 located in the middle in the vertical direction (upper surface side in the illustrated form) and the upper structure The elastic support layer 3 for rotation that elastically supports the vertical rotation due to the bending of the object 30 allows shear deformation in the bridge axis direction on the other side (lower surface side) of the intermediate partition steel plate 7. The elastic bodies 4 for shearing bearings are fixed by vulcanization integral molding.

  Further, the upper plate 5 is fixed to the rotational elastic bearing layer 3 by vulcanization integral molding with the lower surface of the upper plate 5 as the vulcanization fixing surface, and the upper plate 5 is engaged with the shear restraining projection 9 fixed to the intermediate partition steel plate 7. As a result, lateral movement is restricted.

  Further, the lower plate 6 is fixed to the elastic body 4 for shear support by vulcanization integral molding with the upper surface as a vulcanized surface, and the upper surface and side peripheral surface of the upper plate 5 and the upper surface and side of the intermediate partition steel plate 7. The peripheral surface and the side upper surface, the side peripheral surface, and the lower surface in the direction perpendicular to the strong axis of the lower plate 6 are provided with a coating layer 12 formed by vulcanization integral molding.

  More specifically, a female screw hole 11 is provided in the central portion of the intermediate partition steel plate 7, and a projection 9 comprising a vertical axis 9b having male screw shaft portions 9a and 9c at both ends is screwed into the female screw hole 11. An annular groove is provided around the female screw hole 11 on the upper surface of the intermediate partition steel plate 7 so that the lower surface of the upper plate 5 disposed on the upper portion of the intermediate partition steel plate 7 faces the annular groove. The rotary elastic support layer 3 is fixed by vulcanization integral molding so that the annular groove of the intermediate partition steel plate 7 and the annular groove of the upper plate 5 are embedded, and the upper plate 5 and the intermediate partition steel plate 7 is provided with a coating layer 12 made of an elastic material on these side peripheral surfaces, and a coating layer similar to the coating layer 12 is provided on the upper surface of the upper plate 5 to provide weather resistance such as rust prevention. Unevenness such as sex and unevenness Refractory is enhanced.

  A coating layer similar to the coating layer 12 is continuously provided on the lower surface of the lower plate 6 disposed at the lower part of the intermediate partition steel plate 7 to provide weather resistance such as rust prevention and unevenness adaptability such as unevenness. A coating layer similar to the coating layer 12 is continuously provided on the side surface and the top surface of the intermediate partition steel plate 7 to improve weather resistance such as rust prevention and uneven adaptability, and the intermediate partition steel plate 7 The elastic layer 13 of the elastic body 4 for shear support is fixed to the lower plate 6 by vulcanization integral molding. One elastic reinforcing steel plate 23 is embedded in the elastic body 4 for shear support. A plurality of the pressure-proof reinforced steel plates 23 may be embedded.

  The lower plate 6 is provided so as to project in a direction perpendicular to the bridge axis, and anchor bolt insertion holes 33 are provided at four corners thereof, and are attached to the lower structure 34 side by bolts or anchor bolts 31. Has been made possible.

  The function-separated vulcanized integrated support 1 is constituted by the elastic support layer 3 for vulcanization bonded to the intermediate partition steel plate 7, the elastic body 4 for shear force support, the lower plate 6, the upper plate 5, the protrusion 9, and the like. Is configured.

  Next, a mode in which the function-separated vulcanized integrated support 1 as described above is installed between the upper structure 30 and the lower structure 34 will be described with reference to FIGS. 4, 5, 6, and 7. To do.

  First, the structure of the upper bearing steel plate 8 installed on the function-separated vulcanized integrated bearing 1 will be described. The upper bearing steel plate 8 has a stepped through hole 15 at the center and a peripheral edge in the bridge axis direction. A large number of female screw holes 14 are provided at intervals in the direction perpendicular to the strong axis. The stepped through-hole 15 includes a projection insertion hole or bolt insertion hole 19 as an engaging portion through which the projection 9 is inserted, and a ring-shaped nut 16 that is screwed and fixed to the projection 9 around the bolt insertion hole 19. Are provided with an annular bearing surface 17 for facing the uplift force during an earthquake, and an annular bearing wall 18 projecting from the bearing steel plate body around the annular bearing surface 17.

  Then, the function-separated vulcanized integrated support 1 configured as described above is placed on the lower structure 34, and the lower plate 6 is embedded in and fixed to the anchor bolt 31 by the nut 35 attached to the anchor bolt 31. The upper support steel plate 8 is mounted on the covering layer 12 of the upper plate 5 so that the upper support steel plate 8 is fitted to the protrusion 9, and the upper support steel plate 8 is attached by the nut 16 attached to the protrusion 9. The function-separated vulcanized integrated support 1 is separably attached. Further, the outer peripheral surface of the nut 16 is disposed close to the inner peripheral surface of the annular bearing wall 18 so that a horizontal force can be transmitted via the nut 16 in the event of an earthquake or the like.

  In addition, the protrusion insertion hole inner peripheral surface in the upper plate 5 and the upper support steel plate 8 and the outer peripheral surface of the protrusion 9 are arranged close to each other, permitting rotation due to bending of the upper structure 30, and in the horizontal direction. I try to prevent movement.

  The lower flange 27 of the girder 2 made of H-shaped steel and the sole plate 25 fixed to the lower surface thereof are placed on the upper support steel plate 8, and the through holes of the lower flange 27 and the through holes of the sole plate 25 are mounted. The function-separated vulcanized integrated support 1 is installed between the upper structures 30 and 34 by being inserted by a set bolt 10 which is inserted and fixed to the female screw hole 14 of the upper support steel plate 8.

  In order to oppose the lifting force, the means for engaging the protrusion 9 with the upper support steel plate 8 is provided with a female screw hole in the protrusion 9 in place of the nut, and the bolt head is engaged with the support surface 17. You may make it match.

In the embodiment of the present invention, when shear deformation in the direction perpendicular to the bridge axis is constrained by a member (side block) or the like, a bearing device that shears only in the bridge axis direction is formed. If a plurality of them are arranged on the side with an interval in the direction of the bridge axis, a distributed support type elastic support device that performs distributed support in the direction of the bridge axis is configured.
In addition, since the elastic layer 23 such as rubber has a single layer thickness that is thin and the elastic layer 23 does not need to allow the elastic layer 23 to be bent, the design of the elastic layer 23 is facilitated. Since only the shear deformation is required for the layer 23, there is an advantage that the design is simplified.

  In the above-described embodiment, the elastic bearing layer 3 for rotation is arranged on the upper side, and the elastic body 4 for shear support is arranged on the lower side. However, the elastic body 4 for rotation on the upper side is elastic elastic layer for rotation. May be arranged on the lower side.

As a modified form of the embodiment, when the girder 2 is a concrete girder, the sole plate is fixed by an anchor bolt, and the elastic support layer 3 for rotation or the elastic body 4 for shear support is used. The upper support steel plate in the upper elastic support device may be fixed to the sole plate by bolts or welding, or the sole plate may be omitted and fixed by anchor bolts.
When the present invention is carried out, the columnar lead may be embedded in the elastic body 4 for shear support, and the elastic body 4 may be arranged. High elastic rubber may be used for the elastic body 4.

FIGS. 8 and 9 show a functionally separated vulcanized integrated type support 1 according to another embodiment of the present invention, and a form in which the functionally separated vulcanized integrated type support 1 is used between the upper and lower structures 30 and 34. It is shown.
In this embodiment, the function-separated vulcanized integrated support shown in FIGS. 1 to 4 is vertically inverted, the upper plate 5 is used as the lower plate, the lower plate 6 is used as the upper plate, and the upper support steel plate 8 is used as the lower plate. It is the form arranged as a support steel plate.
The same elements as those in the above embodiment are denoted by the same reference numerals, and different portions will be mainly described.
In the embodiment, the upper support steel plate 8 is arranged on the lower side to be the lower support steel plate 8a, and the lower support steel plate 8a is an integrated 1 of the upper support steel plate 8 and the sole plate 25 of the embodiment. Manufactured from sheet steel. The lower support steel plate 8a is provided so as to extend in a direction perpendicular to the bridge axis, and anchor bolt insertion holes 33 are provided at four corners thereof, and can be attached to the lower structure by bolts or anchor bolts 31. Has been. Further, a stepped through hole 15 is provided in the central portion of the lower support steel plate 8a.
The stepped through-hole 15 is supported by a projection insertion hole or bolt insertion hole 19 through which the projection 9 is inserted, and a ring-shaped nut 16 screwed into the projection 9 around the bolt insertion hole 19 to cause an earthquake. An annular bearing surface 17 for opposing the upward lifting force at the time, an annular bearing wall 18 around the annular bearing surface 17, and a lid material accommodating recess 36 such as a female screw hole on the lower surface side, the lid material accommodating recess 36 is provided with a lid 37 by screwing or the like.
The lower plate 6 is used as the upper plate 6 a and is fixed to the upper structure 30 made of the concrete girder 2 by bolts or anchor bolts 31.
In the form shown in FIG. 8 and FIG. 9, the elastic support layer 3 for rotation is disposed at a lower level position on the lower structure 34 side than the embodiment shown in FIG. Since the center of rotation can be used, the bending of the girder can be supported in a stable state at all times or during an earthquake than in the case of a high level position.

As in the above-described embodiment, in the present invention, the elastic support layer 3 for rotation includes the plate 5 (5a) fixed by vulcanization integral molding on the opposite side to the fixing surface with the intermediate partition steel plate 7, and the plate 5 (5a) is provided with an engaging portion (projection insertion hole or bolt insertion hole 19) that engages with the shear restraining projection 9 provided on the intermediate partition steel plate 7, and for shear restraint provided on the intermediate partition steel plate 7. Since the plate 5 (5a) is engaged with the protrusion 9 and the lateral movement is restricted, the lateral movement of the plate 5 (5a) fixed to the rotating elastic support layer 3 is restricted with a simple structure. Thus, the shear deformation of the rotational elastic bearing layer 3 can be restricted.
Further, as in each of the above embodiments, in the present invention, the plate 6 (6a) is fixed to the side opposite to the fixing surface of the elastic body 4 for shear support with the intermediate partition steel plate 7 by vulcanization integral molding, and the rotation The plate 5 (5a) fixed to the elastic support layer 3, the intermediate partition steel plate 7, and the plate 6 (6a) fixed to the elastic body 4 for shear support are the elastic support layer 3 for rotation or the shear support. Since the coating layer 12 by vulcanization integral molding is provided on the portion other than the surface fixed to the elastic body 4, the steel plate portion in the function separation vulcanization integral type support 1 is formed by the coating layer 12 by vulcanization integral molding. Since it is coated, the coating layer 12 by vulcanization integral molding can be surely coated to prevent rust prevention of each steel sheet, and there is some unevenness on the lower structure side or the upper structure side. Even lower play Or a coating layer 12 due to the elastic layer below the coating layer 12 by the upper surface of the elastic layer of the top plate 5 to adapt to uneven surface, can be supported.
In the form shown in FIG. 9, a female threaded joint cylinder is integrally provided at the upper end portion of the anchor bolt 31, and a bolt 40 having a flat head 39 for inserting the bolt of the lower support steel plate 8 is provided in the female thread cylinder 38. It is fixed by screwing.

In the above-described form, the following effects can be obtained.
(1) An elastic bearing layer for rotation that allows rotation due to bending of a girder and an elastic body for shear support that allows shear deformation in the bridge axis direction are provided on one and the other of the upper and lower surfaces of the intermediate partition steel plate, respectively. Since it is fixed by vulcanization integral molding, the elastic support layer for rotation and the elastic body for shear support can be securely fixed to the intermediate partition steel plate with a simple structure, and the support can be manufactured at low cost.
In addition, since the elastic support layer for rotation and the elastic support body for shear support are not separated from each other, it is not necessary to integrate them with bolts or the like as in the prior art. Can be reduced in size and weight, and accordingly, it can be easily transported and installed at low cost.
In addition, since the respective functions are separated by the elastic bearing layer for rotation and the elastic body for shear bearing partitioned by the intermediate partition steel plate, the design of the bearing such as distributed design or seismic isolation design becomes easy.
(2) Since the elastic support layer for rotation provided so as to constrain shear deformation does not cause shear deformation, the elastic layer can bear a high load in the vertical direction, and the elastic body for shear support Since the single layer thickness of the elastic layer is made thin, it is possible to bear a high load, and the function-separated vulcanized integrated type bearing of the present invention can sufficiently load a high load. Since the planar dimension can be reduced, not only can the apparatus be miniaturized, but the apparatus can be easily installed even when the planar installation dimension of the upper surface of the lower structure is small.
In addition, when such a function-separated vulcanized integrated type bearing is installed between the upper structure sole plate and the lower structure in the bridge, the shear deformation is constrained and the girder is allowed to rotate by allowing a minute rotation. The elastic bearing layer is a fixed fulcrum that does not allow the movement of the girders in the direction of the bridge axis, and has an elastic bearing body for shear bearing on the opposite side across the intermediate partition steel plate. It can function as an elastic bearing device that can reduce and transmit a horizontal force to the lower structure or the upper structure while slightly displacing the fixed elastic bearing device. For this reason, when the apparatus of the present invention is installed on a lower structure such as a bridge pier constructed on hard ground or a fixed structure to support the upper structure, the burden of the bending moment acting on the lower structure is buffered. Can be reduced. Also, if the bending rigidity of the substructure such as the pier or abutment is not appropriate, or if the supporting ground is soft or hard ground, the elastic bearing device using the bearing body of the present invention during an earthquake etc. The bending moment acting on the substructure can be transmitted to the supporting ground while being moderately buffered.
Further, since the upper plate is fixed to the rotary elastic bearing layer by vulcanization integral molding, and the upper plate is engaged with the shear restraining protrusion provided on the intermediate partition steel plate, the lateral movement is restrained, so that the simple movement is simplified. With the structure, it is possible to restrain the lateral deformation of the upper plate and restrain the shear deformation of the rotational elastic bearing layer.
Further, the upper surface and side peripheral surface of the upper plate, the upper surface and side peripheral surface of the intermediate partition steel plate, and the side upper surface, side peripheral surface and lower surface of the lower plate are provided with a coating layer by vulcanization integral molding. Therefore, the steel plate part in the functionally separated vulcanized integrated type bearing is covered with a coating layer formed by vulcanized integrated molding, so that it is reliably covered with the coating layer formed by vulcanized integrated molding to prevent rust prevention of each steel plate. Even if there is some unevenness on the lower structure side or the upper structure side, it is not landed by the covering layer by the elastic layer under the lower plate or the covering layer by the elastic layer on the upper surface side of the upper plate. Can adapt to and support.

It is a partial longitudinal cross-sectional perspective view which shows one Embodiment of the function isolation | separation vulcanization integrated type bearing of this invention. 1 is a partially longitudinal side view showing an embodiment of a function-separated vulcanization integrated bearing according to the present invention. FIG. 3 is a partially longitudinal front view showing an exploded main part of the function-separated vulcanized integrated bearing shown in FIG. 2. It is a partially vertical perspective view which shows the state which attached the upper support steel plate. It is a vertical side view which shows the state which installed the function isolation | separation vulcanization integrated bearing of this invention between the upper structure and the lower structure. It is a vertical front view of FIG. An upper support steel plate is shown, Comprising: (a) is a top view, (b) is a partially longitudinal front view. It is a vertical side view which shows the state which installed the function isolation | separation vulcanization integrated bearing of other embodiment of this invention between the upper structure and the lower structure. It is a vertical front view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Function isolation | separation vulcanization integrated type bearing 2 Girder 3 Elastic support layer 4 for rotation Elastic body 5 for shear support Upper plate 5a Lower plate 6 Lower plate 6a Upper plate 7 Intermediate partition steel plate 8 Upper support steel plate 8a Lower support steel plate 9 Protrusion 9a Male screw Shaft part 9b Vertical axis 9c Male threaded shaft part 10 Set bolt 11 Female threaded hole 12 Cover layer 13 Elastic layer 14 Female threaded hole 15 Stepped through hole 16 Nut 17 Bearing surface 18 Annular bearing wall 19 Bolt insertion hole 23 Pressure reinforced steel plate 25 Sole plate 27 Lower flange 30 Upper structure 31 Bolt or anchor bolt 33 Bolt insertion hole 34 Lower structure 35 Nut 36 Cover material receiving recess 37 Cover 38 Female screw cylinder 39 Flat head 40 Bolt

Claims (3)

  On one side of the upper and lower surfaces of the intermediate partition steel plate located in the middle of the vertical direction, there is an elastic bearing layer for rotation that is supported elastically by allowing shear deformation to be restricted and allowing vertical rotation due to deflection of the upper structure. A function-separated vulcanization integrated type, wherein elastic bodies for shear support that are supported while allowing horizontal shear deformation are fixed to the other side of the intermediate partition steel plate by vulcanization integral molding, respectively. Support.   The elastic bearing layer for rotation includes a plate fixed by vulcanization integral molding on a side opposite to a fixing surface with the intermediate partition steel plate, and engages with a shear restraining protrusion provided on the intermediate partition steel plate. 2. The functional separation vulcanization method according to claim 1, wherein an engaging portion is provided, and the plate is engaged with a shear restraining protrusion provided on the intermediate partition steel plate to restrain lateral movement. Body support.   A plate is fixed to the opposite side of the elastic body for shear support with the intermediate partition steel plate by vulcanization integral molding, the plate fixed to the elastic support layer for rotation, the intermediate partition steel plate, and the shear The plate fixed to the elastic body for support is characterized in that a coating layer formed by vulcanization integral molding is provided in a portion other than the surface fixed to the elastic support layer for rotation or the elastic body for shear support. 2. Function-separated vulcanized integrated bearing as described in 2.

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