JP2002031191A - Laminated rubber bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a matter of anxiety that the mounting flange is arbitrarily removed after delivering by fixing a mounting flange on a laminated rubber part quickly and easily and eliminating control for adjusting a clamping force and preventing loosening in tightening a bolt when a laminated rubber bearing is assembled. SOLUTION: A shear key 18 is engaged between a plate member for connecting 13 stuck to the laminated rubber part 15 and the mounting flange 16 to pass a cotter pin 20 having a latching nail part 25 that can be displaced elastically through a stepped hole 24 of the mounting flange 16 and a key hole 23 of the plate member for connecting 13. Therefore, the mounting flange 16 is fixed on the plate member for connecting 13 by seating a head part 26 of the cotter pin 20 and by latching the latching nail part 25 of the cotter pin on the key hole 23 using its elastic restoring force in a latching state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated rubber bearing having a laminated rubber portion formed by alternately laminating and integrating an internal rubber layer and an internal reinforcing plate. The present invention relates to a fixing structure (assembly structure) of a mounting flange.

[0002]

2. Description of the Related Art A laminated rubber bearing is used as a bearing for supporting various structures in a seismic isolation or vibration isolation manner.
In buildings built on foundations and precision equipment installed on installation stands, it is necessary to minimize the transmission of external vibrations caused by earthquakes and passing vehicles, and to attenuate the transmitted vibrations as early as possible. Required. In addition, when protecting structures from earthquakes and further protecting structures requiring high safety and precision, such as nuclear facilities, computers, semiconductor manufacturing equipment, and electron microscopes, from vibrations, In addition to blocking large earthquakes, it is also required to block small vibrations.

[0003] In order to respond to such demands and to elastically support various structures so as to be seismically isolated or anti-vibration, laminated rubber bearings are used. This laminated rubber bearing for seismic isolation has a structure in which mounting flanges are fixed to upper and lower end surfaces of a laminated rubber portion formed by alternately laminating and integrating internal rubber layers and internal reinforcing plates. As the internal reinforcing plate, for example, a metal or hard plastic plate is used. In general, this type of laminated rubber bearing has a structure in which a flange member (attachment flange) for attaching to a structure or the like is directly fixed to upper and lower end surfaces of the laminated rubber portion, or an upper and lower portion of the laminated rubber portion. An external flange type having a structure in which a connecting plate member is integrally fixed to an end face of the connecting plate member and the mounting flange is fixed to these connecting plate members by bolts or the like is employed.

[0004] Such a laminated rubber bearing body is usually formed by vulcanizing a rubber material and a reinforcing plate, which are alternately laminated, and the mounting flange or the connecting plate member (connecting steel plate) in a mold. It is manufactured by a method of integrating. The laminated rubber bearing body has a high spring constant in the vertical direction and a low spring constant in the horizontal direction, and the vertical / horizontal spring constant ratio may be as large as 800 or more.

On the other hand, in the above-described laminated rubber bearing, a solid structure in which an internal rubber layer and an internal reinforcing plate are merely laminated has a damping characteristic of only the internal viscosity damping action of the internal rubber layer itself. Depending on the type of rubber and the conditions of use, the vibration damping capacity may be too low. Therefore, in order to improve the vibration damping capacity, a hole (cavity) is formed through the internal rubber layer and the internal reinforcing plate in the vertical direction, and the viscosity of raw rubber, tar, metallic lead (column-shaped lead plug) or the like is formed therein. By encapsulating a filler material of elastic material, the laminated rubber bearing body that has increased vibration damping capacity while preventing the free surface area of the bearing body from increasing and preventing deformation and preventing the longitudinal spring constant from excessively decreasing. For example, JP-A-63-293340, JP-A-2000-1
No. 10878 and the like. The invention according to the present application is applicable to various types of laminated rubber bearings, including such a filled rubber laminated rubber bearing.

As described above, the laminated rubber bearing body having the mounting flange has a structure in which the internal rubber layers and the internal reinforcing plates are alternately laminated and the mounting flange is joined to both upper and lower end surfaces. In addition to the structure integrated by vulcanization, an internal rubber layer and an internal reinforcing plate are alternately laminated, and a connecting plate member (connecting steel plate) is joined to both upper and lower end surfaces to form an integrated laminated rubber portion. After that, a structure in which a mounting flange is fixed to the upper and lower connecting plate members, that is, a structure in which an external flange is assembled, is used. The present invention relates to a structure for assembling a laminated rubber bearing body having a structure in which the external flange is assembled.

[0007]

However, in a conventional laminated rubber bearing having a structure in which an external flange is assembled, the mounting flange is bolted at a plurality of positions (for example, 12 positions) of the connecting plate member. Because of the configuration, not only do many man-hours are required to fasten these bolts, but also it is necessary to adjust the bolt tightening force and manage the assembly to prevent loosening. There is a technical problem to be solved, such as the fear that the mounting flange may be removed without permission even after the mounting.

The present invention has been made in view of such technical problems, and an object of the present invention is to quickly and easily assemble a mounting flange to a laminated rubber portion by eliminating bolting work. It does not require adjustment of the tightening force or management of assembly to prevent loosening, and there is no need to worry about the mounting flange being detached after assembly and delivery. An object of the present invention is to provide a laminated rubber bearing having a mounting flange fixing structure exhibiting the same strength and durability as described above.

[0009]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing one embodiment of a laminated rubber bearing body to which the present invention is applied, and FIG.
FIG. 2 is a plan view (top view) viewed from line 2-2 in FIG. 1.
1 and 2, a laminated rubber bearing body 10 is formed by alternately laminating an internal rubber layer 11 and an internal reinforcing plate 12 and joining a connecting plate member 13 to upper and lower end surfaces thereof to form an integral laminated rubber portion. 15, the upper and lower connecting plate members 13
The mounting flange 16 is fixed to each of the above. The laminated rubber portion 15 is integrated in a state in which the internal rubber layer 11, the internal reinforcing plate 12, and the connecting plate member 13 are joined and placed in a mold and vulcanized. In forming the laminated rubber portion 15, usually, the inner reinforcing plate 12 is covered by integrally forming a coating rubber layer having a desired thickness on the outer peripheral surface thereof.

The upper and lower mounting flange members 16 are provided with a plurality of mounting holes 17 for fastening the laminated rubber bearing body 10 to upper and lower structures, a base, and the like with bolts or the like. The mounting holes 17 are formed at 12 places (equidistant positions) on the same circumference in the illustrated example. The inner rubber layer 11
Is formed of a rubber-like elastic material having a desired hardness and elastic modulus (for example, a rubber-like elastic material having a hardness of about 40 degrees in JIS hardness (equivalent to a shear modulus of elasticity of G4)). The upper and lower connecting plate members 13 are made of a hard and strong material such as metal or hard plastic. The internal rubber layer 11 is formed by vulcanizing a rubber material such as raw rubber into a rubber-like elastic body, and is vulcanized and molded in a mold to form the internal reinforcing plates 12 and the upper and lower connecting plates. It is integrated (fixed) with the plate member 13. Therefore, in the present invention, the mounting flange 1
In order to assemble 6 with the laminated rubber portion 15, the shear key 1
A fixed structure using both the pin 8 and the split pin 20 is used.

FIG. 3 is a partially exploded perspective view schematically showing an assembled state by the shearing key 18. As shown in FIG. 1 and 3, a concave hole 21 having a predetermined depth is formed in the center of the outer surface of the connecting plate member 13, and the mounting flange 1 is formed.
A concave hole 22 having a predetermined depth corresponding to the concave hole 21 is formed in a central portion of the back surface (joining surface) of the hollow 6.
A shearing key (shearing piece) 18 is fitted to the first and the second 22 and the shearing key 18 is fitted between the connecting plate member 13 and the mounting flange 16 so that the upper and lower mounting flanges 16 are provided.
Are positioned concentrically with respect to the upper and lower end faces of the laminated rubber portion 15.

FIG. 4 is a partial longitudinal sectional view schematically showing an assembled state by the split pin 20, and FIG. 5 is a perspective view of the split pin 20 in FIG. Yes,
FIG. 6 is a perspective view of the split pin 20 of FIG. 5 as viewed from the head, and FIG. 7 is an end view of the split pin 20 of FIG. 5 as viewed from the tip hook portion. 1 to 7, an inner large diameter (a shape having a larger hole diameter at the back) is provided at a plurality of positions (12 positions in the illustrated example) at equal intervals on a concentric arc with the center of each connecting plate member 13. The stepped keyhole 23 is formed. Also,
Positions of the mounting flanges 16 corresponding to the stepped keyholes 23 (in the illustrated example, eight at equal intervals on a concentric arc with the center).
Location) has a large outside diameter (a shape with a large hole diameter near the entrance)
Are formed.

After the stepped through holes 24 are aligned with the stepped keyholes 23 with the shearing key 18 fitted therein, heads are provided in the stepped throughholes 24 and the stepped keyholes 23 respectively. The split pin 20 is inserted and latched in a retaining state. The split pin 20 has an elastically displaceable engaging claw 25 formed at the tip of the pin, and a head 26 formed on the opposite side. Also, the pin tip 28 of the split pin 20
In the illustrated example, the hooking claw portion 25 is divided into two by a diametrically-divided groove 27 and is formed to be elastically displaceable in a direction approaching each other. Although the split groove 27 is formed over the entire length of the pin portion (up to immediately below the head 26) in the illustrated example, the depth of the split groove (length in the pin direction) is appropriately determined in consideration of the degree of elastic displacement. It will be selected. As the material of the split pin 20, various materials such as metal or resin can be used as long as the material is a high-strength hard material having a predetermined elasticity.

The structure of the hooking claw 25 is not limited to the two-part structure shown in the figure.
A configuration may be adopted in which the pin is divided into three or more by three or more radially divided grooves and is formed of a pin tip that is elastically displaceable in a direction approaching each other. A mark 29 (FIG. 6) for indicating the position of the split groove 27 is provided on the top surface of the head 26 of each split pin 20. The mark 29 is used to indicate a cutting position when the split pin 20 is cut by a cutter or the like when the mounting flange 16 is fixed to the laminated rubber portion 15 and then the mounting flange 16 is removed for some reason. is there. Therefore, when there are three or more split grooves, the marks 29 are also provided in three or more radial directions accordingly.

FIG. 8 schematically shows a state immediately before the mounting flange 16 is fixed to the laminated rubber portion 15 having the connecting plate members 13 on the upper and lower end surfaces using the shearing key 18 and the split pin 20. It is an exploded longitudinal sectional view. Laminated rubber part 1
As shown in FIGS. 1 and 8, the step of fixing the mounting flange 16 to the step 5 is performed by aligning the stepped through holes 24 with the stepped keyholes 23 in a state where the shearing key 18 is fitted, and then as described above. Is inserted into each stepped keyhole 23 of the connecting plate member 13 through each stepped through hole 24 of the mounting flange 16.
The head 26 is seated on the stepped portion 31 of the stepped through hole 24, and the hooking claw 25 of the split pin 20 is pulled out into the stepped portion 32 of the keyhole 23 by using its elastic restoring force. It is performed by fixing the mounting flange 16 to the connecting plate member 13 by hooking in the stopped state.

As shown in FIGS. 1, 2 and 8, the mounting flange 16 protrudes from the connecting plate member 13 (has a large diameter in the case of a circular shape). The holes 17 for mounting the support body are formed at a plurality of positions on a concentric circle larger than the pitch circle where the stepped through holes 24 are arranged. That is, the mounting holes 17 of the support body are formed at a plurality of concentric circles having a diameter larger than the pitch circle in which the stepped through holes 24 are arranged (eight places at equal intervals in the illustrated example) of the mounting flange 16. ing. Further, the keyhole 2 of the connecting plate member 13 is formed.
3 and the stepped through hole 24 of the mounting flange 16
It is formed at a plurality of equally spaced positions (eight places) on the same arc centered on the concave holes 21 and 22 in which the shear key 18 is fitted. The stepped keyhole 23 of the connecting plate member 13 is formed as a blind hole in the illustrated example, but may be formed as a through hole in some cases.

According to the embodiment described above, the internal rubber layer 11 and the internal reinforcing plate 12 are alternately laminated, and the laminated rubber portion 15 integrated by joining the connecting plate members 13 to both upper and lower end surfaces is formed. In the laminated rubber bearing body formed by fixing the mounting flange 16 to each of the upper and lower connecting plate members 13, an inner large-diameter stepped keyhole 23 is formed at a plurality of positions of the connecting plate member 13. In addition, a stepped through-hole 24 having a large outside diameter is formed at a position corresponding to each of the stepped keyholes of the mounting flange 16, and a shear key is provided between the connecting plate member 13 and the mounting flange 16. 18, and a split pin 20 with a head having an elastically displaceable engaging claw 25 on a pin portion (pin tip portion 28) is inserted through the stepped through hole 24 of the mounting flange 16. Per inserted into the keyway 23, with seating the head 26 of the head with split pin 20 in the stepped portion 31 of the stepped through-hole 24, the headed split pin 2
By using the elastic restoring force of the hooking claw 25, the mounting flange 16 is locked in the stepped portion 32 of the key hole 23 in a state where it can be prevented from coming off.
Since no bolting work is required, the mounting flange 16 can be quickly and easily assembled to the laminated rubber portion 15, and adjustment of the tightening force and assembly for preventing loosening are performed. No management is required, and the mounting flange 16
The laminated rubber bearing body 10 is provided with a fixing structure of the mounting flange 16 which has the same strength and durability as a bolt with respect to the force of pulling out the mounting flange 16 without worrying that the mounting rubber 16 will be removed.

In the above embodiment, the laminated rubber portion 15
Has a solid structure in which the internal rubber layer 11 and the internal reinforcing plate 12 are laminated. However, the present invention provides an internal rubber layer and an internal reinforcing plate inside the laminated rubber portion in order to improve the vibration damping ability. Of a viscoelastic material such as raw rubber, tar, metallic lead (column-shaped lead plug) for forming a hole (or cavity) penetrating through vertically in the hole (or cavity) to increase the vibration damping ability. The present invention can be similarly applied to a laminated rubber bearing having a structure in which a filler is sealed, and has the same effect.

FIG. 9 is a longitudinal sectional view schematically showing a state in which the laminated rubber bearing of FIG. 1 is elastically displaced. In FIG. 9, when the structure shakes due to an earthquake or the like, the laminated rubber bearing 1
0 is elastically displaced so as to reciprocate as indicated by a solid line and a two-dot chain line. Then, a force (pulling force) for separating the mounting flange 16 from the laminated rubber portion 15 (connection plate member 13) acts, and a tensile force similar to that of the conventional fastening bolt acts on each split pin 20. . Even in that case, according to the configuration of FIGS. 1 and 9, the head 26 is seated on the stepped portion 31 of the stepped hole 24 of the mounting flange 16 using the split pin 20 with a head, and Since the locking claw portion 25 is hooked on the stepped portion 32 of the stepped keyhole 23 of the connecting plate member 13 (laminated rubber portion 15), the same strength and durability as bolts with respect to the pulling force of the mounting flange 16 are obtained. The mounting flange 16 is securely mounted without the need for adjusting the tightening force or managing the assembly to prevent loosening, and without having to worry about removing the mounting flange after assembly and delivery. Can be fixed firmly.

FIGS. 10 to 13 are diagrams illustrating the usage of the laminated rubber bearing 10 described above. FIGS. 10 and 11 show the laminated rubber bearing 10 used alone and constructed one by one. It is a schematic side view and a schematic plan view showing a state in which a structure 60 such as an object, a device, or a device is elastically supported on a base 70 such as a foundation or a floor. FIGS. 12 and 13 show a state in which the upper and lower end surfaces of a plurality (four in the illustrated example) of the laminated rubber bearing bodies 10 are connected by a stabilizer 40 in a plurality of stages (for example, 5 to 2).
0), and a structure 60 such as a building, an apparatus, or a device is elastically mounted on a base 70 such as a foundation or a floor via the multi-stage seismic isolation unit 50. It is a schematic side view and a schematic plan view showing a supporting state.

[0021]

As is apparent from the above description, according to the present invention (invention 1), the internal rubber layers and the internal reinforcing plates are alternately laminated, and the connecting plate members are joined to both end surfaces to be integrated. Forming a laminated rubber portion, the mounting rubber member fixed to the connecting plate member mounting flange,
Key holes are formed at a plurality of positions of the connecting plate member, and a stepped through hole is formed at a position of the mounting flange corresponding to the key hole, and a shear key is provided between the connecting plate member and the mounting flange. By inserting a cotter pin having a fitting claw portion that is fitted and elastically displaceable into a keyhole of the connecting plate member through a stepped through hole of the mounting flange,
The head of the cotter pin is seated in the stepped through-hole, and the retaining claw of the cotter pin is retained in the keyhole in a retaining state by utilizing its elastic restoring force, so that the mounting flange is provided. Is fixed to the connecting plate member, so that bolting work is not required, the mounting flange can be quickly and easily assembled to the laminated rubber portion, and the tightening force can be adjusted and loosening can be prevented. Installation that does not require assembly management, does not have to worry about the mounting flange being detached after assembly and delivery, and has the same strength and durability as bolts with respect to the force to pull out the mounting flange A laminated rubber bearing having a flange fixing structure is provided.

According to the present invention, the shearing key further fits into a concave hole formed in a central portion of the connecting plate member and a concave hole formed in a central portion of the mounting flange. A key hole of the connecting plate member and a stepped through hole of the mounting flange are formed at a plurality of equally spaced positions on the same circular arc centered on the concave hole; The keyhole is a blind hole, the hooking claw is divided into two by a diametrically-divided groove, and is formed of a pin tip that can be elastically displaced in a direction approaching each other. The hooking claw has a radius. A split end formed by three or more split grooves in the direction and formed by a pin tip which can be elastically displaced in a direction approaching each other, or the position of the split groove on the top surface of the head of the split pin Is marked to display Since the, laminated rubber bearing body is provided which can achieve more efficiently the effects.

According to the eighth aspect of the present invention, an internal rubber layer and an internal reinforcing plate are alternately laminated, and a connecting rubber member is joined to upper and lower end surfaces to form an integrated laminated rubber portion,
In a laminated rubber bearing body in which a mounting flange is fixed to each of the upper and lower connecting plate members, an inner large-diameter stepped keyhole is formed at a plurality of positions of the connecting plate member, and An outer large-diameter stepped through hole is formed at a position corresponding to each of the stepped keyholes, and a shear key is fitted between the connecting plate member and the mounting flange. Insert a headed split pin having a possible hooking claw part into a stepped keyhole of the connecting plate member through a stepped through hole of the mounting flange, and attach the head of the headed split pin to the stepped through hole. The seat flange is seated on the stepped portion, and the locking claw portion of the headed split pin is locked in the stepped portion of the keyhole using the elastic restoring force by using its elastic restoring force. Plate member Since a structure for fixing, since it does not require bolting operations, can be assembled mounting flange quickly and easily with respect to the laminated rubber portion,
There is no need to adjust the tightening force or manage the assembly to prevent loosening, and there is no need to worry about removing the mounting flange after assembly and delivery. A laminated rubber bearing having a mounting flange fixing structure exhibiting strength and durability is provided.

According to the ninth to eleventh aspects of the present invention, in addition to the configuration of the first aspect, the mounting flange has a plurality of concentric circles having a diameter larger than a pitch circle in which the stepped through holes are arranged. A structure in which a mounting hole for the support is formed, or a hole that vertically penetrates the internal rubber layer and the internal reinforcing plate is formed inside the laminated rubber portion to increase the vibration damping ability inside the hole. Since a filler of a viscoelastic material such as raw rubber, tar, metallic lead (column-shaped lead plug) or the like is sealed, the above-mentioned effect can be achieved more efficiently.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a laminated rubber bearing body to which the present invention is applied.

FIG. 2 is a plan view as seen from line 2-2 in FIG.

FIG. 3 is a partially exploded perspective view schematically showing an assembled state by a shearing key in FIG. 1;

FIG. 4 is a partial longitudinal sectional view schematically showing an assembled state by a split pin in FIG. 1;

FIG. 5 is a perspective view of the split pin in FIG. 4 as viewed from a pin tip.

FIG. 6 is a perspective view of the split pin of FIG. 5 as viewed from the head.

FIG. 7 is an end view of the split pin of FIG. 5 as viewed from the tip of the pin.

FIG. 8 is an exploded vertical sectional view schematically showing a state immediately before fixing a mounting flange to a laminated rubber portion having connecting plate members on upper and lower end surfaces using a shearing key and a split pin.

9 is a longitudinal sectional view schematically showing a state where the laminated rubber bearing body of FIG. 1 is elastically displaced.

FIG. 10 is a schematic side view showing a state in which a structure is elastically supported on a base using a single laminated rubber bearing.

11 is a schematic plan view of FIG.

FIG. 12 is a schematic view showing a state in which a structure is elastically supported on a base using a multi-stage seismic isolation unit in which a plurality of laminated rubber bearing bodies connected at upper and lower end surfaces by a stabilizer are assembled in a plurality of stages. It is a side view.

FIG. 13 is a schematic plan view of FIG.

[Explanation of symbols]

 Reference Signs List 10 laminated rubber bearing 11 internal rubber layer 12 internal reinforcing plate 13 connecting plate member 15 laminated rubber part 16 mounting flange 17 mounting hole 18 shear key 20 split pin 21 concave hole 22 concave hole 23 stepped key hole 24 stepped through hole 25 Hook claw 26 Head 27 Split groove 28 Pin tip 29 Mark 31 Stepped part 32 Stepped part

Claims (10)

[Claims] 1. An internal rubber layer and an internal reinforcing plate are alternately laminated, and a connecting plate member is joined to both end surfaces to form an integrated laminated rubber portion, and a mounting flange is fixed to the connecting plate member. In the laminated rubber bearing body, keyholes are formed at a plurality of positions of the connecting plate member, and a stepped through hole is formed at a position of the mounting flange corresponding to the keyhole. A shear key is fitted between the mounting flange and a split pin having an elastically displaceable latching claw is inserted into a keyhole of the connecting plate member through a stepped through hole of the mounting flange. The head of the pin is seated in the stepped through hole, and the retaining claw of the cotter pin is retained in the key hole in a retaining state by utilizing its elastic restoring force. A laminated rubber bearing body fixed to a connecting plate member. 2. The method according to claim 1, wherein the shearing key fits into a concave hole formed in a central portion of the connecting plate member and a concave hole formed in a central portion of the mounting flange. 5. The laminated rubber bearing according to item 1. 3. A key hole of the connecting plate member and a stepped through hole of the mounting flange are formed at a plurality of equally spaced positions on the same arc centered on the concave hole. Item 3. A laminated rubber bearing according to Item 2. 4. The laminated rubber bearing according to claim 1, wherein the keyhole of the connecting plate member is a blind hole. 5. The locking claw portion is formed by a pin tip portion which is divided into two by a diametrical groove and is elastically displaceable in a direction approaching each other.
5. The laminated rubber bearing according to any one of 4. 6. The pin according to claim 6, wherein the hooking claw portion is divided into three or more by three or more dividing grooves in a radial direction, and is formed of a pin tip portion which can be elastically displaced in a direction approaching each other. 5. The laminated rubber bearing according to any one of 1 to 4. 7. The laminated rubber bearing according to claim 5, wherein a mark for indicating a position of the split groove is provided on a top surface of a head of the split pin. 8. An internal rubber layer and an internal reinforcing plate are alternately laminated, and a connecting plate member is joined to both upper and lower end surfaces to form an integrated laminated rubber portion. In a laminated rubber bearing body having a mounting flange fixed thereto, an inner large-diameter stepped keyhole is formed at a plurality of positions of the connecting plate member, and the stepped keyholes correspond to the stepped keyholes of the mounting flange. An outer large diameter stepped through hole is formed at a position, a shearing key is fitted between the connecting plate member and the mounting flange, and a pin claw portion elastically displaceable is provided at a pin tip portion. Inserting the headed split pin into the stepped keyhole of the connecting plate member through the stepped through hole of the mounting flange, and seating the head of the headed split pin on the stepped portion of the stepped through hole, The split pin with head The mounting flange is fixed to the connecting plate member by using the elastic restoring force of the hooking claw portion to lock the stepped portion of the keyhole in a state where it cannot be removed. Bearing body. 9. The mounting flange according to claim 1, wherein mounting holes are formed at a plurality of positions on a concentric circle having a diameter larger than a pitch circle in which the stepped through holes are arranged. 9. The laminated rubber bearing according to any one of the above items 8. 10. A hole which penetrates the internal rubber layer and the internal reinforcing plate in a vertical direction inside the laminated rubber portion, and raw rubber, tar, metal lead for increasing vibration damping ability inside the hole. The laminated rubber bearing according to any one of claims 1 to 9, wherein a filler of a viscoelastic material such as (a columnar lead plug) is sealed.