JP2016084682A - Rubber bearing body, and rubber bearing device having the rubber bearing body mounted thereon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rubber bearing body that suppresses swelling of a rubber layer toward outer peripheral part when a load is exerted, and may be made more compact, thinner and more durable, and a rubber bearing device having the rubber bearing body mounted thereon.SOLUTION: A rubber bearing body 20 includes laminated rubber formed in a desired form and having a built-in intermediate reinforcing plate 25 between rubber layers 23, an upper reinforcing plate 21 disposed on an end of the laminated rubber member, and a lower reinforcing plate 22 disposed on the other end of the laminated rubber member, the laminated rubber member, the upper reinforcing plate and the lower reinforcing plate being formed integrally. The intermediate reinforcing plate includes a flat plate-form first reinforcing part 25a disposed within a prescribed range from the center of the laminated rubber in a radial direction and having a prescribed wall thickness, and a second reinforcing part 25b disposed on an outer peripheral side of the first reinforcing part, at a portion with a greater wall thickness than the wall thickness of the first reinforcing part.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a rubber bearing body and a rubber bearing device for supporting an upper structure with respect to a lower structure. More specifically, the present invention relates to a rubber bearing body that is capable of responding to a high surface pressure while being small and thin while suppressing swelling to the outer peripheral surface side, and a rubber bearing device provided with the rubber bearing body.

Currently, rubber bearings are often used for bridge bearings. Generally, a rubber bearing has a configuration in which a reinforcing steel plate and rubber are laminated. Since this rubber bearing tends to increase in size with the response to the seismic design by the dynamic verification method, there is a great demand for reducing the height or miniaturization of the rubber bearing. For example, the present invention relates to a rubber bearing in which an intermediate reinforcing member is formed of plain-woven high-strength fibers and can be elastically deformed sufficiently with respect to vertical tensile force and rotational force without increasing the thickness of the rubber layer. A technique is known (see, for example, Patent Document 1). Further, as one method to miniaturization, the surface pressure of the conventional rubber bearing (e.g., 8~12N / mm ²⁾ higher than the surface pressure (e.g., 25 N / mm ²⁾ for supporting the upper structure at high What is called a surface pressure rubber bearing or a high pressure rubber bearing has been adopted.

The high surface pressure rubber bearing and the high pressure rubber bearing will be described based on patent literature.
Each of the lower support member and the upper support member has an annular reaction force wall, and either the lower support member or the upper support member is provided with a shear deformation restraint wall, and the tip of the shear restraint wall is the other member. There is also known a technique related to a fixed load support member slidably fitted in a recess of a member provided on the surface (see, for example, Patent Document 2). Further, the present applicant also has an upper support member in which an upper receiving recess is formed, a lower support member in which a lower receiving recess is formed, an elastic layer interposed between the upper support member and the lower support member, and elasticity The technique regarding the support apparatus which has the hard member arrange | positioned in the area | region enclosed by the upper accommodation recessed part and lower accommodation recessed part of a layer is proposed (refer patent document 3).

JP 2006-258132 A JP 2004-308109 A JP 2013-32662 A

  Each of the above-described technologies is considered to be a technology that exerts an appropriate effect and can reduce the thickness and size of the rubber bearing. However, there is a growing demand for the rubber bearings to be smaller and thinner than those of the above-described technology. For this purpose, there is a demand for developing a rubber bearing and a rubber bearing device that can be further reduced in size, thinned, and improved in durability by reviewing the rubber bearing with a new concept.

The present invention has been made in view of such conventional techniques and achieves the following object.
An object of the present invention is to suppress a rubber layer from expanding to the outer peripheral side when a load in the compression direction is applied, and to make a rubber bearing body that can be downsized, thinned, and improved in durability, and the rubber. An object of the present invention is to provide a rubber bearing device provided with a bearing body.

The present invention takes the following means in order to achieve the object.
The rubber bearing body of the present invention 1
Laminated rubber formed in a desired shape and incorporating an intermediate reinforcing plate between rubber layers, an upper reinforcing plate provided at one end of the laminated rubber member, and the other end of the laminated rubber member The intermediate reinforcing plate is provided over a predetermined range in the radial direction from the center of the laminated rubber, and has a predetermined thickness. A flat plate-shaped first reinforcing portion formed in a thickness dimension, and a second reinforcing portion provided on the outer peripheral side of the first reinforcing portion and formed so that the thickness dimension is thicker than the first reinforcing portion. The rubber layer has a thickness dimension between the upper reinforcing plate and the second reinforcing portion and between the lower reinforcing plate and the second reinforcing portion. Shaped to be thinner than the thickness between the first reinforcing portion and between the lower reinforcing plate and the first reinforcing portion. Characterized in that it is.

The rubber bearing body of the present invention 2 in the present invention 1,
The intermediate reinforcing plate is made of a fiber reinforced resin in which a reinforcing fiber is contained in a thermosetting resin or a thermoplastic resin.

The rubber bearing body of the present invention 3 in the present invention 2,
The intermediate reinforcing plate is characterized in that a prepreg made of fiber reinforced resin is cut into a desired size, and the cut prepregs are laminated to form a desired shape.

The rubber bearing body of the present invention 4 in the present invention 3,
The intermediate reinforcing plate is formed by laminating prepregs made of fiber reinforced resin in which reinforcing fibers are plain-woven and laminated by heating and pressure curing, and the laminated prepregs are in the fiber direction of the reinforcing fibers. Are arranged so as to face different directions and to reduce the difference in the directionality of the mechanical characteristics.

The rubber bearing body of the present invention 5 is the invention 2 to 4,
The reinforcing fiber is a carbon fiber.

The rubber bearing body of the present invention 6 is the invention 1 to 5,
The intermediate reinforcing plate is provided with an inclined portion whose thickness is gradually increased between the first reinforcing portion and the second reinforcing portion so that the first reinforcing portion and the second reinforcing portion are continuous. It is what is characterized by the above.

The rubber bearing body of the present invention 7 is the present invention 1 to 5,
The second reinforcing portion is a reinforcing portion having a tapered shape in a sectional view, which is formed so that the outer peripheral surface side has a maximum thickness dimension and is gradually increased in thickness from the first reinforcing portion. .

The rubber bearing body of the present invention 8 is the invention 1 to 5,
The second reinforcing portion is a ring-shaped reinforcing portion having a cross-sectional shape of any one of a circular shape, an elliptical shape, and an oval shape.

The rubber bearing body of the present invention 9 is the invention 1 to 5,
The first reinforcing portion is a disc-shaped reinforcing portion that continuously extends from the central portion to the outer peripheral side, and the second reinforcing portion is provided on the outer peripheral side of the first reinforcing portion, and It is a ring-plate-shaped reinforcement part provided so that both sides of the end surface of a reinforcement part may be pinched | interposed.

The rubber bearing device of the present invention 10 is characterized in that the rubber bearing body described in the present invention 1 to 9 is provided.
The rubber bearing device according to the eleventh aspect of the present invention is the tenth aspect of the present invention.
An upper collar provided at an upper portion of the rubber bearing body and having a tapered outer peripheral portion having a smaller diameter on the upper surface side than a lower surface side; and a lower collar or a base plate on the lower side of the rubber bearing body, and the taper It has a taper hole fitted in an outer peripheral part, The taper outer peripheral part is provided with the restraint ring plate fitted in the taper hole.

  The rubber bearing body of the present invention includes a flat plate-like first reinforcing portion that is provided in a predetermined radial range from the center of the laminated rubber and has a predetermined thickness, and the first reinforcing portion. An intermediate reinforcing plate is provided that is provided on the outer peripheral side of the second reinforcing portion and is formed so as to be thicker than the first reinforcing portion. Therefore, when a load in the compression direction acts on the rubber bearing body, the amount of the rubber layer bulging toward the outer peripheral surface can be suppressed, and the rubber bearing body can be used with a high allowable compressive stress level. Therefore, the rubber bearing body can be reduced in size, thickness, durability, and the like. Moreover, this rubber bearing body can be made thin and small because the intermediate reinforcing plate is made of fiber-reinforced resin.

  The rubber bearing device of the present invention is provided with the rubber bearing body described above, and the rubber bearing device can be reduced in size and thickness. Further, the rubber bearing device is provided on the upper structure side, and is provided on the upper structure side where a tapered outer peripheral portion having a tapered upper surface with a smaller diameter on the lower surface side is formed, and on the lower structure side. It has a taper hole that fits into the outer periphery of the taper, has a constraining ring plate in which the outer periphery of the taper fits into the taper hole, and constitutes a sealed rubber support device with a rubber support inside Can do. For this reason, the life of the rubber bearing body can be extended and maintenance-free can be achieved. In addition, this rubber bearing device is fitted with the taper hole of the constraining ring plate and the tapered outer periphery of the upper collar. In this rubber bearing system, the upper collar moves in the horizontal direction with respect to the lower collar or the base plate. To be restrained. Further, this rubber bearing device has a lifting force acting on the upper structure side, and when the upper collar side attempts to lift the lower collar or the base plate in this rubber bearing apparatus, the tapered outer periphery of the upper collar and the restraining ring By being fitted with the tapered hole of the plate, it is possible to resist the lifting force acting on the upper collar side.

FIG. 1 is a plan view showing a rubber bearing device provided with a rubber bearing body according to an embodiment of the present invention. FIG. 2 is a front view showing a part of the rubber bearing device provided with this rubber bearing body along the line AA in FIG. FIG. 3 is a perspective view showing a part of the rubber bearing device provided with the rubber bearing body. 4A and 4B are views showing a rubber bearing body according to the present invention, in which FIG. 4A is a plan view and FIG. 4B is a cross-sectional view. FIG. 5 is an enlarged cross-sectional view of a portion B in FIG. FIG. 6 is a cross-sectional view schematically showing a part of the intermediate reinforcing plate. FIG. 7 is an explanatory view schematically showing a laminated state of the reinforcing fiber resin. FIG. 8 is an explanatory view schematically showing another laminated body of reinforcing fiber resin. FIG. 9 is a cross-sectional view showing a partially enlarged rubber bearing body according to Embodiment 1 and corresponding to FIG. FIG. 10 is a cross-sectional view showing a partially enlarged rubber bearing body according to another embodiment 2 and corresponding to FIG. FIG. 11 is a cross-sectional view showing a partially enlarged rubber bearing body according to another embodiment 3, which corresponds to FIG. FIG. 12 is a front view showing, in partial cross section, another embodiment of a rubber bearing device provided with this rubber bearing body.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view showing a rubber bearing device provided with the rubber bearing body of the present invention, and FIG. 2 is a front view showing a part of the rubber bearing device cut along the line AA in FIG. FIG. 3 and FIG. 3 are perspective views showing the rubber bearing device in partial cross section. 4A and 4B are views showing a rubber bearing body according to the present invention, in which FIG. 4A is a plan view and FIG. 4B is a cross-sectional view. 5 is an enlarged cross-sectional view showing a portion B of FIG. 4B, FIG. 6 is a cross-sectional view schematically showing a part of the intermediate reinforcing plate, and FIG. 7 is a schematic view showing a laminated state of the reinforcing fiber resin. FIG. 8 is an explanatory view schematically showing another laminated body of reinforcing fiber resin.

  As shown in FIGS. 1 and 2, the rubber bearing device 1 provided with the rubber bearing body of the present invention has a rubber bearing body 20 provided therein, and an upper structure relative to a lower structure (for example, a pier, an abutment). (For example, bridges). The rubber bearing body 20 is built in the rubber bearing device 1. An upper collar 13 is provided on the upper surface of the rubber bearing body 20. The upper collar 13 is a tapered member whose outer peripheral portion 13a is inclined at a predetermined angle so that the diameter on the lower side is larger than the diameter on the upper side. A fitting hole 13e for fitting the shear key 15 is formed in the upper end surface 13d of the upper collar 13.

  The base plate 10 is a plate formed in a rectangular shape in plan view, and a plurality of (for example, eight in this example) screw holes 10a are formed in a rectangular shape so as to have a predetermined interval. A screw portion 16 a formed at the tip of the anchor bolt 16 is screwed into each screw hole. In a concrete structure which is a lower structure (not shown), a plurality of anchor bolts 16 into which screw portions 16a are screwed are embedded in the base plate 10 and integrated, whereby the base plate 10 is integrated with the lower structure. It is fixed to.

  In the upper part of the base plate 10 in FIG. 2, a lower collar 11 formed in a rectangular shape in plan view is provided. A plurality of (for example, 12 in this example) bolt holes are formed in the lower collar 11 in a rectangular shape. In addition, screw holes are formed in the base plate 10 at positions corresponding to the bolt holes of the lower collar 11. The lower rod 11 is fastened and fixed to the base plate 10 by the bolts 17 inserted through the bolt holes being screwed into the screw holes of the base plate 10. A lower side support hole 11a for fitting and supporting a lower steel plate (lower reinforcing plate) 22 (see FIG. 4) of the rubber bearing body 20 is formed on the upper end surface side of the lower rod 11.

  A restraining ring plate 12 is provided on the upper part of the lower collar 11. The constraining ring plate 12 is a plate having an annular shape in plan view, and a plurality of bolt holes 12b are formed at predetermined intervals. A screw hole 11 b is formed in the lower collar 11 at a position corresponding to the bolt hole 12 b of the restraining ring plate 12. The restraint ring plate 12 is fastened and fixed to the lower collar 11 by the bolt 18 inserted through the bolt hole 12 b being screwed into the screw hole 11 b of the lower collar 11.

  The constraining ring plate 12 has a predetermined angle at the center so that the diameter (inner diameter) on the lower end face (lower surface) side gradually increases relative to the diameter (inner diameter) on the upper end face (upper surface) side. A tapered hole portion 12a is formed. A tapered outer peripheral portion 13a formed in a tapered shape of the upper collar 13 is fitted into the tapered hole portion 12a. The tapered outer peripheral portion 13a is a tapered portion having a predetermined angle so that the diameter on the lower end surface (lower surface) 13b side gradually increases with respect to the diameter on the upper end surface (upper surface) 13d side, and is restrained. It is a tapered portion formed at an angle that matches or substantially matches the taper angle of the inner peripheral portion 12 a of the ring plate 12. Thus, since the tapered outer peripheral portion 13a of the upper collar 13 is fitted in the tapered hole portion 12a of the constraining ring plate 12, a sealed rubber bearing device 1 in which a rubber bearing body 20 to be described later is provided. Can be configured. Therefore, it is possible to extend the life of the rubber bearing body 20 and make it maintenance-free. Further, in the rubber bearing device 1, since the tapered hole portion 12 a of the restraining ring plate 12 and the tapered outer peripheral portion 13 a of the upper collar 13 are fitted, the upper collar 13 is connected to the lower collar 11 in the rubber bearing device 1. On the other hand, the movement in the horizontal direction is restricted. Further, when the upper lifting force acts on the upper structure, and the upper collar 13 side attempts to lift the lower collar 11 (base plate 10) in the rubber bearing device 1, the tapered outer peripheral portion 13a of the upper collar 13 and the restraining ring plate Since the 12 tapered holes 12a are fitted, it is possible to resist the lifting force acting on the upper flange 13 side.

  The upper rod 13 is a truncated cone-shaped member having a substantially trapezoidal shape in cross section, and an upper steel plate (upper reinforcing plate) 21 of the rubber bearing body 20 is fitted to the lower surface 13b side of the upper rod 13 in FIG. An upper support hole 13c is formed for support. A fitting hole 13e into which a later-described shear key 15 is fitted is formed in the upper surface 13d of the upper collar 13. The fitting hole 13e is a blind hole, and the shear key 15 contacts the bottom surface (lower surface) of the fitting hole 13e, and the inner peripheral surface of the fitting hole 13e supports the outer peripheral surface of the shear key 15. .

  The flange 30 of the bridge girder, which is an upper structure, is fixed to the upper collar 13 via a sole plate 32. The sole plate 32 is integrally fixed to the flange 30 by welding or the like. A hole 32 a into which the shear key 15 is inserted is formed in the center of the sole plate 32. A plurality of screw holes 13f are formed in the upper surface 13d of the upper collar 13 at a predetermined interval. Bolt holes 32 b are formed in the flange 30 and the sole plate 32 at positions corresponding to the screw holes 13 f of the upper collar 13. By screwing a plurality of (for example, twelve in this example) bolts 31 inserted into the bolt holes 30a of the flange 30 and the bolt holes 32b of the sole plate 32 into the screw holes 13f, the flange 30 and the upper collar 13 are firmly fixed. To be fastened and fixed.

[Rubber bearing body]
An embodiment of the rubber bearing 20 will be described.
The rubber support 20 includes an upper steel plate 21, a lower steel plate 22, a rubber layer 23 provided between the upper steel plate 21 and the lower steel plate 22, and an intermediate reinforcing plate 25 built in the rubber layer 23. The upper steel plate 21 is a steel reinforcing plate that reinforces the upper side of the rubber bearing body 20, and is a member that is fitted into the upper side support hole 13c formed in the upper collar 13 as described above. . The lower steel plate 22 is a steel reinforcing plate that reinforces the lower side of the rubber support 20 and is a member that is fitted into the lower side support hole 11 a formed in the lower collar 11.

  The rubber layer 23 is made of a rubber material such as chloroprene (CR), ethylene-propylene-diene rubber (EPDM), urethane rubber, natural rubber, etc. In this example, chloroprene (CR) is adopted. The rubber layer 23 is filled in a gap between the upper steel plate 21 and the lower steel plate 22 and covers the outer peripheral surfaces of the upper steel plate 21 and the lower steel plate 22. On the outer peripheral surface of the rubber layer 23, an annular recess 24 having a predetermined radius with a central portion of the outer peripheral surface recessed is formed. The annular recess 24 is a groove for allowing deformation when the rubber layer 23 swells. Further, an intermediate reinforcing plate 25 is built in the rubber layer 23. The upper steel plate 21, the lower steel plate 22, the intermediate reinforcing plate 25, and the rubber layer 23 are firmly and firmly fixed together by vulcanization adhesion.

  The intermediate reinforcing plate 25 is a member made of carbon fiber reinforced resin in which carbon fibers 26 are contained in a thermosetting resin 27 that is a matrix. Carbon fiber has very high mechanical properties such as a specific gravity ¼ that of iron, a specific strength 10 times that of iron, and a specific modulus 7 times that of iron. The thermosetting resin may be a resin (for example, epoxy resin) that does not soften even at a predetermined temperature (for example, 150 ° C.). The predetermined temperature is a temperature reached when vulcanized and bonded to the rubber layer 23, and may be other types of resins as long as the resin does not soften at the predetermined temperature.

  The intermediate reinforcing plate 25 is obtained by cutting a plain woven prepreg sheet in which carbon fiber bundles of carbon fibers 26 are alternately woven into a predetermined shape, laminating them into a predetermined shape, and then heating in an autoclave (pressure cooker, kiln). -Pressurized and cured to produce a molded product (see FIG. 6). At this time, as shown in FIG. 7, the laminated woven prepreg sheet has a fiber direction d1 of the first prepreg sheet 26a and a fiber direction d2 of the second prepreg sheet 26b at a predetermined angle θ1 (for example, 45 °) When positioned in different directions separated from each other, the laminate of the prepreg sheets faces the direction in which the fiber directions (d1, d2) having large mechanical properties such as tensile strength can be complemented, and the strength and rigidity of the intermediate reinforcing plate 25 It is preferable that directionality is less likely to occur in the mechanical characteristics. Further, as shown in FIG. 8, the fiber direction d1 of the first prepreg sheet 26a, the fiber direction d12 of the second prepreg sheet 26c, and the fiber direction d13 of the third prepreg sheet 26d are set at predetermined angles θ1, θ2 (for example, 30 °) When positioned in different separated directions, the laminate of prepreg sheets is oriented in the direction that the fiber direction with higher mechanical properties such as tensile strength can be further complemented, and the mechanical properties such as strength and rigidity of the intermediate reinforcing plate 25 Directionality is less likely to occur, which is preferable.

  The intermediate reinforcing plate 25 is provided at the central portion over a predetermined range in the radial direction from the central portion of the support rubber body, and the central thin plate is formed in a flat plate shape with a predetermined thickness (thin wall). Outer peripheral thick plate portion (second reinforcing portion) 25b formed near the outer peripheral surface of the annular recess 24 of the rubber layer 23 on the outer peripheral side of the portion (first reinforcing portion) 25a and the central thin plate portion 25a. And an intermediate taper portion 25c for forming a continuous portion therebetween. The intermediate taper portion 25 c is for preventing stress concentration from occurring in the intermediate reinforcing plate 25. The outer peripheral side thick plate part 25b is a part formed in a dimension thicker than the thickness dimension of the central thin plate part 25a. The intermediate taper portion 25c is a portion formed in a tapered shape in a sectional view that gradually increases from a portion continuous with the central thin plate portion 25a toward a portion continuous with the outer peripheral side thick plate portion 25b. Note that the intermediate taper portion may not be a tapered portion that gradually increases in a straight line but may be a portion that gradually increases in a curved shape. As shown in FIG. 6, the outer peripheral side thick portion 25b increases the number of laminated prepreg sheets cut to a desired size as it approaches the outer peripheral surface, and in the autoclave in a state of being laminated in such a shape. Such an intermediate reinforcing plate 25 is manufactured by heating and pressurizing. The intermediate reinforcing plate 25 is made of a carbon fiber reinforced resin, and can sufficiently improve mechanical properties such as strength and rigidity even when the thickness is reduced.

  The rubber bearing body 20 incorporates such an intermediate reinforcing plate 25 so that the rubber layer 23 on the outer peripheral surface side is thinner than the rubber layer 23 in the central portion. Is formed. With such a shape, when a load in the compression direction acts on the rubber support 20, the rubber layer 23 supports the load at a thick portion at the central portion and also in the horizontal direction. In an attempt to release the load, the rubber layer 23 is swelled toward the outer peripheral surface. However, the dimensions between the upper steel plate 21 and the intermediate reinforcing plate 25 and the lower steel plate 22 and the intermediate reinforcing plate 25 are configured such that the outer peripheral side is narrower than the central portion, and the outer peripheral rubber layer 23 is formed. The thickness of the rubber layer is also configured such that the thickness of the rubber layer on the outer peripheral surface side is thinner than the thickness of the rubber layer at the center. For this reason, even if the rubber layer 23 tends to bulge to the outer peripheral surface side, the rubber layer 23 is prevented from bulging outward from the outer peripheral surface.

  By suppressing the rubber layer 23 from bulging out of the outer peripheral surface, local strain of the rubber layer 23 can be suppressed and durability can be improved. The rubber layer 23 reinforced by the intermediate reinforcing plate 25 can minimize deformation. An annular recess 24 is formed on the outer peripheral surface of the rubber bearing body 20, and deformation within the annular recess 24 can be achieved. Moreover, since the thickness of the rubber layer 23 is reduced on the outer peripheral surface side, the amount of the rubber layer 23 bulging toward the outer peripheral surface side is suppressed. In this manner, since the amount of swelling is suppressed, the durability of the rubber bearing body 20 is improved. Further, the internal stress in the rubber layer 23 can be dispersed by the intermediate reinforcing plate 25, and the allowable bearing stress of the rubber bearing body 20 can be increased. Therefore, the rubber bearing body 20 can be reduced in size and thickness.

  Further, the rubber bearing device 1 has a structure in which the rubber bearing body 20 is hermetically sealed by fitting the tapered hole portion 12a of the restraining ring plate 12 and the tapered outer peripheral portion 13a of the upper collar 13 into the rubber bearing body 20. The service life can be extended and maintenance-free. Further, in the rubber bearing device 1, since the tapered hole portion 12 a of the restraining ring plate 12 and the tapered outer peripheral portion 13 a of the upper collar 13 are fitted, the upper collar 13 of the rubber bearing device 1 is against the lower collar 11. The movement in the horizontal direction is restricted. Further, in this rubber bearing device, when the upper lifting force acts on the upper structure and the upper collar 13 side of the rubber bearing device 1 tries to lift the lower collar 11, the upper part of the rubber bearing device 1 rises in the tapered hole portion 12a of the restraining ring plate 12. Since the taper outer peripheral part 13a of the collar 13 is fitted, it can resist the lifting force acting on the upper collar 13 side.

[Other Embodiments of Rubber Bearing]
Based on FIGS. 9 to 11, other embodiments 1 to 3 of the rubber support will be described.
FIG. 9 is a cross-sectional view showing another embodiment 1 of the rubber bearing body partially enlarged, and is a cross-sectional view corresponding to FIG. 5, and FIG. 10 shows another embodiment 2 of the rubber bearing body. FIG. 11 is a sectional view corresponding to FIG. 5 and FIG. 11 is a sectional view partially enlarged showing another embodiment 3 of a rubber bearing, FIG. 6 is a cross-sectional view corresponding to FIG. 5. In the description of the other embodiments, the same parts as those of the rubber bearing body 20 described above are denoted by the same reference numerals, and detailed description thereof is omitted.

[Rubber bearing body of other embodiment 1]
Based on FIG. 9, another embodiment 1 of the rubber bearing body will be described.
The rubber bearing body 120 according to the other embodiment 1 includes a central thin plate portion (first reinforcing portion) 125a and an outer peripheral taper plate portion (second reinforcing portion) 125b provided on the outer periphery of the central thin plate portion 125a. An intermediate reinforcing plate 125 is incorporated. The other operations and effects are the same as those of the intermediate reinforcing plate 25 of the above-described embodiment, and detailed description thereof is omitted. In the description of the other embodiment 1, the second reinforcing portion is described as a taper plate portion that gradually increases in a straight line, but may be a plate portion that gradually increases in a curved shape.

[Rubber bearing body of other embodiment 2]
Based on FIG. 10, another embodiment 2 of the rubber bearing body will be described.
The rubber bearing body 220 according to the other embodiment 2 includes a central thin plate portion (first reinforcing portion) 225a, and a ring-shaped reinforcing rod-shaped portion (second reinforcing portion) 225b provided on the outer peripheral side of the central thin plate portion 225a. An intermediate reinforcing plate 225 made of is incorporated. The other operations and effects are the same as those of the intermediate reinforcing plate 25 of the above-described embodiment, and detailed description thereof is omitted. In the other embodiment 2, the second reinforcing portion is described as having a circular cross section. However, the second reinforcing portion has an elliptical cross section, an elliptical cross section, a semicircular cross section, and a semicircular cross section. Or a semicircular cross section.

[Rubber bearing body of other embodiment 3]
Based on FIG. 11, another embodiment 3 of the rubber bearing will be described.
The rubber bearing body 320 of the other embodiment 3 has a disk-shaped plate portion 325a sandwiched between both ends of the disk-shaped plate portion (first reinforcing portion) 325a and the outer periphery of the disk-shaped plate portion 325a. An intermediate reinforcing plate 325 including a pair of ring-shaped plate portions (second reinforcing portions) 325b formed as described above is incorporated. The intermediate reinforcing plate 325 of the other embodiment 3 is not integrated with the second reinforcing portion, but the size between the upper steel plate and the intermediate reinforcing plate, the lower steel plate and the intermediate reinforcing plate is narrowed, and the rubber layer The thickness can be reduced, and substantially the same operation and effect as the intermediate reinforcing plate 25 of the above-described embodiment are exhibited.

[Other Embodiments of Rubber Bearing Device]
Based on FIG. 12, another embodiment of the rubber bearing device will be described.
FIG. 12 is a front view showing, in partial cross section, another embodiment of a rubber bearing device provided with a rubber bearing body. In the description of other embodiments, the same parts as those of the rubber bearing device 1 described above are denoted by the same reference numerals, and detailed description thereof is omitted.
In the rubber bearing device 1A according to another embodiment, the lower steel plate 22 of the rubber bearing body 20 is fitted to the base plate 10A, and a lower support hole for supporting the lower portion of the rubber bearing body 20 is formed. The restraining ring plate 12 is fastened and fixed to the base plate 10A by bolts 18. The anchor bolt 16A is fastened and fixed to the base plate 10A by a nut 19. Since the lower arm can be omitted without changing the other parts, the rubber bearing device 1A can be made thinner.

  Although the embodiment of the present invention and other embodiments have been described above, the present invention is not limited to this embodiment, and can be modified within the scope of the purpose and spirit of the present invention. Needless to say. For example, the intermediate reinforcing plate is described as being made of carbon fiber reinforced resin, but even if the reinforcing plate is made of reinforced fiber resin containing other reinforcing fibers (for example, glass fiber, aramid fiber). Good. Moreover, the thing made from the reinforced fiber resin in which the reinforced fiber contained in the thermoplastic resin may be sufficient. Further, the intermediate reinforcing plate made of reinforced fiber resin may be formed by other methods such as a press molding method. Moreover, although the intensity | strength etc. are a little inferior, the steel intermediate | middle reinforcement board of the shape where the thickness of an outer peripheral side site | part is thicker than a center part may be sufficient. Further, in this embodiment, an example in which one intermediate reinforcing plate is incorporated in the rubber layer is described, but a plurality of intermediate reinforcing plates may be incorporated in the rubber layer.

DESCRIPTION OF SYMBOLS 1,1A ... Rubber bearing apparatus 10, 10A ... Base plate 11 ... Lower collar 12 ... Restraint ring plate 13 ... Upper collar 15 ... Shear key 16, 16A ... Anchor bolt 20 ... Rubber bearing body 21 ... Upper steel plate (upper reinforcing plate)
22 ... Lower steel plate (lower reinforcing plate)
23 ... rubber layer 24 ... annular recess 25, 125, 225, 325 ... intermediate reinforcing plate 25a, 125a, 225a, 325a ... first reinforcing portion 25b, 125b, 225b, 325b ... second reinforcing portion 30 ... flange 32 ... sole plate

Claims (11)

Laminated rubber formed in a desired shape and incorporating an intermediate reinforcing plate between the rubber layers;
An upper reinforcing plate provided at one end of the laminated rubber member;
A rubber bearing body integrally formed with a lower reinforcing plate provided at the other end of the laminated rubber member,
The intermediate reinforcing plate is provided in a predetermined radial range from the center of the laminated rubber, and has a flat plate-like first reinforcing portion formed in a predetermined thickness dimension, and the first reinforcing portion. It is provided on the outer peripheral side, and consists of a second reinforcing portion formed so that the thickness dimension is thicker than the first reinforcing portion,
The rubber layer has a thickness dimension between the upper reinforcing plate and the second reinforcing portion and between the lower reinforcing plate and the second reinforcing portion. And a thickness smaller than a thickness dimension between the lower reinforcing plate and the first reinforcing portion. In the rubber bearing body according to claim 1,
The intermediate reinforcing plate is made of a fiber reinforced resin in which a reinforcing fiber is contained in a thermosetting resin or a thermoplastic resin. In the rubber bearing body according to claim 2,
The intermediate support plate is a rubber bearing body in which the prepreg made of fiber reinforced resin is cut into a desired size, and the cut prepregs are laminated to form a desired shape. In the rubber bearing body according to claim 3,
The intermediate reinforcing plate is formed by laminating prepregs made of fiber reinforced resin, in which reinforcing fibers are plain woven, and heating and pressure curing.
The laminated prepregs are arranged so that the fiber directions of the reinforcing fibers are in different directions and the difference in the directionality of mechanical properties is reduced. In the rubber bearing body according to any one of claims 2 to 4,
The rubber bearing body, wherein the reinforcing fiber is a carbon fiber. In the rubber bearing body according to any one of claims 2 to 5,
The intermediate reinforcing plate is provided with an inclined portion whose thickness is gradually increased between the first reinforcing portion and the second reinforcing portion so that the first reinforcing portion and the second reinforcing portion are continuous. A rubber bearing body characterized by being made. In the rubber bearing body according to any one of claims 2 to 5,
The second reinforcing portion is a reinforcing portion having a tapered shape in a sectional view, which is formed so that the outer peripheral surface side has a maximum thickness dimension and is gradually increased in thickness from the first reinforcing portion. Rubber bearing body. In the rubber bearing body according to any one of claims 2 to 5,
The rubber bearing body, wherein the second reinforcing portion is a ring-shaped reinforcing portion having a cross-sectional shape of any one of a circular shape, an elliptical shape, and an oval shape. In the rubber bearing body according to any one of claims 2 to 5,
The first reinforcing portion is a disk-shaped reinforcing portion that continuously extends from the center portion to the outer peripheral surface side,
The second reinforcing portion is a pair of ring plate-shaped reinforcing portions provided on an outer peripheral side of the first reinforcing portion and provided so as to sandwich an end surface of the first reinforcing portion from both sides. Rubber bearing body. A rubber bearing device according to any one of claims 1 to 9, wherein the rubber bearing device is provided. The rubber bearing device according to claim 10,
An upper collar provided on an upper portion of the rubber bearing body and having a tapered outer peripheral portion having a smaller diameter on the upper surface side than the lower surface side;
A constraining ring plate provided on a lower arm or base plate on the lower side of the rubber bearing body, having a tapered hole fitted into the tapered outer peripheral portion, and the tapered outer peripheral portion being fitted into the tapered hole; Rubber bearing device characterized by.

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