JP2001050322A - Manufacture for laminated rubber supporting body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bury columnar elasto-plastic metal including lead body into a laminated rubber body without generating defective caused by deformation. SOLUTION: This method is for manufacturing a laminated rubber supporting body 1 provided with a laminated rubber body 4 with a hollow part 7 being formed in the center thereof having a rubber layer 5 and a middle steel plate 6 alternately laminate-molded between an upper connecting steel plate 2 and a lower connecting steel plate 3, a lead body 8 inserted in the hollow part 7 of the laminated rubber body 4, an upper mounting plate 9 and a lower mounting plate 10 secured to the upper connecting steel plate 2 and the lower connecting steel plate 3, respectively, of the laminated rubber body 4 having the lead body 8 inserted. In this case, the lead body 8 having a cross sectional shape formed so as to be insertable into the hollow part 7 without being press- fitted is inserted into the hollow part 7 immediately after vulcanization and molding of only the laminated rubber body 4, and the upper mounting plate 9 and the lower mounting plate 10 are secured to the upper connecting steel plate 2 and the lower connecting steel plate 3, respectively, of the laminated rubber body 4 having the lead body 8 inserted into the hollow part 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a laminated rubber bearing used for seismic isolation, vibration isolation or vibration isolation of buildings, precision equipment, and the like. The present invention relates to a method of manufacturing a laminated rubber bearing body that absorbs horizontal vibration energy by enclosing an elastic-plastic metal.

[0002]

2. Description of the Related Art Conventionally, in order to reduce the vibration acceleration applied to an upper structure by absorbing a relative horizontal vibration energy between the upper structure and a lower structure. Energy absorbing devices (JP-A-59-62742), seismic isolation devices (JP-A-9-105440),
A seismic isolation device (Japanese Patent Laid-Open No. 9-105441) has been proposed.

As shown in FIG. 6, a basic structure of these devices is such that a rubber-like elastic body 55 and a rigid material 56 are alternately laminated between an upper connecting plate 52 and a lower connecting plate 53, , A laminated rubber body 54 having a through hole 57 formed therein, a columnar lead 58 pressed into the through hole 57 of the laminated rubber body 54, and an upper connecting plate 52 of the laminated rubber body 54 into which the columnar lead 58 is press fitted.
And a lower mounting plate 60 fixed to the lower connecting plate 53. A protective rubber layer 61 is mounted on the outer peripheral portion of the laminated rubber body 54 later or integrally molded (hereinafter, referred to as an integral molding). "Laminated rubber bearing body 51".)

[0004] The laminated rubber bearing 51 constructed as described above.
Supports the load of the building during normal times, suppresses the swinging of the building due to the resistance due to the initial rigidity of the columnar lead 58 during a micro-earthquake and strong winds, and suppresses the soft horizontal rigidity and columnar lead of the laminated rubber body 54 during a large earthquake. Vibration energy is absorbed by 58 extensible plastic deformation.

[0005] Such vibration energy absorption performance is exhibited.
Product quality control is important. This quality
As a management, a stable rubber-like elastic body 55 was obtained.
Material management and dimensional management, rubber-like elastic body 55 and rigid material
Adhesive application to obtain stable and strong adhesion with 56
Before surface treatment management, adhesive application management, temperature and pressure during molding
Force management, furthermore, the through hole 57 of the laminated rubber body 54 has a columnar shape.
There is a manufacturing control for encapsulating the lead 58. In particular, production pipes
In order to obtain stable vibration absorption performance,
Volume V of lead-like lead 58₀Of the through hole 57 of the laminated rubber body 54
Volume V_SAnd the ratio V ₀/ V_SMust be close to 1.0
Absent.

[0006]

However, in such a conventional laminated rubber bearing body 51, the diameter of the columnar lead 58 and the diameter of the through hole 57 are reduced in order to make the columnar lead 58 adhere to the inner peripheral surface of the through hole 57. The columnar lead 58 must be formed substantially the same and the axial height of the columnar lead 58 is formed slightly higher than the axial height of the laminated rubber body 54, and the columnar lead 58 must be press-fitted into the through hole 57 by a hydraulic device or the like. Therefore, as shown in FIG. 7, when the columnar lead 58 is press-fitted, the columnar lead 58 and the through hole 57 of the laminated rubber body 54 may be damaged, or the columnar lead 58 itself may be bent. Also, as shown in FIG. 8, the end face of the press-fitted columnar lead 58 rises,
(A)) The through-hole 57 of the laminated rubber body 54 and the columnar lead 58
Clearance t _z (FIG. 8 (b)) was sometimes generated between the.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and provides a method of manufacturing a laminated rubber bearing which can embed a columnar elasto-plastic metal in a laminated rubber without causing a deformation defect. The purpose is to provide.

[0008]

According to the present invention, there is provided a method for manufacturing a laminated rubber bearing, which comprises a rubber elastic body and a rigid material alternately provided between an upper connecting plate and a lower connecting plate. A laminated rubber body formed by lamination molding and having at least one hollow portion formed therein, a columnar elasto-plastic metal inserted into the hollow portion of the laminated rubber body, and an upper connection of the laminated rubber body having the columnar elasto-plastic metal inserted therein In manufacturing a laminated rubber bearing body having an upper mounting plate fixed to a plate and a lower mounting plate fixed to a lower connecting plate, only the laminated rubber body is vulcanized immediately after vulcanization molding, and the cross-sectional shape becomes hollow. Insert the columnar elasto-plastic metal formed into a shape that can be inserted without press-fitting into the hollow part, and attach the upper mounting plate to the upper connecting plate of the laminated rubber body with the columnar elasto-plastic metal inserted in the hollow part, and the lower connecting plate The lower mounting plate is fixed to each.

According to the method of manufacturing a laminated rubber support of the present invention thus constituted, the height of the laminated rubber body is higher immediately after vulcanization molding than at room temperature. When returning, if the columnar elasto-plastic metal is manufactured at such a height as to be in close contact with the inner peripheral surface of the hollow portion, the columnar elasto-plastic metal can be easily inserted into the hollow portion of the laminated rubber body. In addition, since the mechanical strength of the columnar elastoplastic metal decreases due to heat transmitted from the laminated rubber body, in this state (when the temperature rises), the upper mounting plate and the lower mounting plate are fixed to the laminated rubber body. In this case, the columnar elasto-plastic metal can adhere to the hollow portion, the upper mounting plate, and the lower mounting plate in accordance with the contraction of the rubber-like elastic body due to the temperature decrease of the laminated rubber body.

In the method of manufacturing a laminated rubber bearing according to the present invention, one of the upper mounting plate and the lower mounting plate is fixed to a corresponding connecting plate before inserting the columnar elasto-plastic metal into the hollow portion. Is preferred. By this, after vulcanization molding, just remove the laminated rubber body from the mold, insert the columnar elasto-plastic metal and fix any one of the mounting plates,
The columnar elastic-plastic metal can be enclosed in the laminated rubber body.

In the method for producing a laminated rubber bearing according to the present invention, the ratio V ₀ / V _S between the volume V ₀ of the columnar elastoplastic metal at room temperature and the volume V _S of the hollow portion at room temperature is 0.98 to 0.98. 1.02
It is preferable to set This allows the columnar elasto-plastic metal inserted into the hollow portion of the laminated rubber body to adhere to the hollow portion, the upper mounting plate, and the lower mounting plate, following the contraction of the rubber-like elastic body due to the temperature decrease of the laminated rubber body. it can. The ratio V ₀ / V _S is set in the range of 0.98 to 1.02 because it changes depending on the vulcanization temperature and the diameter and height of the lead during vulcanization molding.

In the method of manufacturing a laminated rubber bearing according to the present invention, it is preferable that the temperature at which the columnar elasto-plastic metal is inserted into the hollow portion be set at a temperature of minus 200 ° C. or higher and lower than room temperature. As a result, even when the volume is the same, the dimension when the columnar elasto-plastic metal is inserted can be reduced due to the temperature difference from the laminated rubber bearing body, so that the volume of the columnar elasto-plastic metal is made larger than the volume of the hollow portion of the laminated rubber body. Can be. Therefore, the degree of adhesion of the columnar elastic-plastic metal can be changed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the method for manufacturing a laminated rubber bearing according to the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a laminated rubber bearing which is the object of the manufacturing method of the present invention has a rubber layer 5 which is a rubber-like elastic body and an intermediate material which is a rigid material between an upper connecting steel plate 2 and a lower connecting steel plate 3. A laminated rubber body 4 having a hollow portion 7 formed by alternately laminating steel plates 6 and a columnar elastic-plastic metal 8 inserted into the hollow portion 7 of the laminated rubber body 4 is provided.

The laminated rubber body 4 is formed in a cylindrical shape, and a hollow portion 7 is hollowed out in the center. The columnar elastic-plastic metal 8 is inserted into the hollow portion 7. For the rubber layer 5 of the laminated rubber body 4, natural rubber or synthetic rubber such as chloroprene rubber having excellent elasticity is used. The upper connecting steel plate 2, the lower connecting steel plate 3, and the intermediate steel plate 6 are usually made of a steel plate because of the adhesiveness of the rubber layer 5, but are plated with a nickel plate, a steel plate, a brass plate or nickel plating, a copper plating, and a brass plating. A steel plate or the like can be used. In addition, the inner peripheral surface of the hollow portion 7 of the laminated rubber body 4 has inner peripheral surfaces 2a of the upper connecting steel plate 2, the lower connecting steel plate 3, and the intermediate steel plate 6,
It is preferable that 3a and 6a are exposed or the rubber layer 5 is slightly adhered. This is because the rubber layer portion on the inner peripheral surface of the hollow portion 7 is effective in removing microvibration, but if the rubber layer portion is too thick, the damping force during an earthquake decreases.

The column-shaped elasto-plastic metal 8 is preferably pure lead, which is rich in extensibility and can be easily plastically deformed. However, a lead alloy having characteristics such as pure lead may be used (hereinafter, "lead body 8").
That. ). In addition, the lead body 8 is formed to have a cross-sectional shape that can be inserted without being pressed into the hollow portion 7. Specifically, the diameter of the lead body 8 at room temperature is 98 to 99.5% of the diameter of the hollow portion 7 of the laminated rubber body 4 at room temperature, and the height of the lead body 8 at room temperature is The height is set to 1 to 4% of the height of the laminated rubber body 4 at normal temperature. In this case, the ratio V ₀ / V _S of the volume V _S at the normal temperature of the hollow portion 7 of the volume V ₀ and the laminated rubber body 4 at the normal temperature of Namaritai 8 to 0.98 to 1.02. The ratio V ₀ / V _S is set in the range of 0.98 to 1.02 because the ratio varies depending on the vulcanization temperature and the diameter and height of the lead 8 during vulcanization molding.

The upper connecting steel plate 2 and the lower connecting steel plate 3 of the laminated rubber body 4 into which the lead body 8 is inserted are provided with an upper mounting plate 9 and a lower mounting plate 10, respectively, with connecting bolts 11.
Is fixed by The thicknesses of the upper mounting plate 9 and the lower mounting plate 10 are set to 3 in consideration of versatility and economy of the material.
0 to 50 mm. As a result, the lead body 8 is sealed in the laminated rubber support 1. The method of encapsulating the lead body 8 is not limited to this, and as shown in FIGS. 2A and 2B, a cap plate fitted to the upper connecting steel plate 2 or the lower connecting steel plate (not shown) itself. 12 may be sealed by fixing it by a bolt fixing method or a screwing method. Further, as shown in FIG. 3, a mounting plate 13 in which a connecting steel plate is integrated may be used. In this case, the cap plate 14 fitted to the mounting plate 13 itself is fixed by a bolt fixing method or a screwing method. Alternatively, it may be sealed.

A method for manufacturing the laminated rubber bearing 1 thus configured will be described with reference to the flowchart of FIG.
Since the laminated rubber body 4 is molded by a vulcanizing press, a mold for vulcanization molding (not shown) is used.

First, after laminating the laminated rubber body 4 to a predetermined height in a vulcanizing mold, vulcanizing molding is started by a vulcanizing press (step 101). The molding conditions for this vulcanization molding are as follows: a heating temperature of 80 to 170 ° C., and a pressing force of 80 to 200
kgf / cm ² is set. When the vulcanization molding is started, the rubber layer 5 of the laminated rubber body 4 is vulcanized by heat and pressure, and at the same time, an adhesive reaction occurs to complete the integral vulcanization molding. In addition,
The temperature of the laminated rubber body 4 immediately after vulcanization molding is 80 to 150 ° C.
Preferably from 100 to 150C, more preferably from 120 to 150C.
Set the heating temperature to 150 ° C. This is because the higher the temperature of the laminated rubber body 4 is, the larger the diameter of the hollow portion 7 becomes, so that the lead body 8 can be inserted without difficulty.
Further, when the vulcanized molded laminated rubber body 4 is cooled and then reheated, the heating temperature is set such that the temperature of the laminated rubber body 4 is 60 to 120 ° C, preferably 80 to 100 ° C. This is to prevent deterioration of the rubber layer 5 as much as possible.

Immediately after the integral vulcanization molding, the laminated rubber body 4 is released from the vulcanization molding die, and the lower mounting plate 10 is fixed to the downstream connecting steel plate 3 of the laminated rubber body 4 with the connecting bolt 11 ( Steps 102 to 104). Then, the lead body 8 is inserted into the hollow portion 7 of the laminated rubber body 4 (Step 105).

Here, the laminated rubber body 4 at normal temperature and under no load
In order to enclose the lead body 8 having a volume V ₀ equal to or greater than the volume V _S of the hollow part 7 in the hollow part 7, the diameter of the lead body 8 at room temperature is smaller than that of the hollow part 7 of the laminated rubber body 4. 98-99.
Since it is set to 5%, the lead body 8 must be 1-4% higher than the height of the hollow portion 7 of the laminated rubber body 4 at normal temperature.

The height of the laminated rubber body is 160 to 500.
mm is common, relatively low 160-250mm
In the case of a laminated rubber body having a height of 1 to 2% in diameter,
Leads 2-4% smaller in area and 250
In the case of a laminated rubber body having a height of up to 500 mm, a lead body 0.5 to 1% smaller in diameter and 1 to 2% smaller in area is preferably used. From this fact, by making the height of the lead body about 10 mm higher than the height of the laminated rubber body, the volume V ₀ of the manufactured lead body and the volume V _S of the hollow portion of the laminated rubber body become substantially equal. I understand.

The height of the laminated rubber body 4 into which such a lead body 8 is inserted is increased by vulcanization molding. For example, the temperature of the laminated rubber body 4 immediately after vulcanization molding is 100 to 13
When the temperature is set to 0 ° C., the height of the laminated rubber body 4 is increased by about 5%. Therefore, since the shrinkage starts to return to the original size as the temperature decreases, the hollow portion 7 of the laminated rubber body 4 starts.
So that the end face of the lead body 8 does not protrude from the
The upper mounting plate 9 is fixed to the upstream connecting steel plate 2 with the connecting bolt 11 (step 106).

The laminated rubber body 4 having a large volume of rubber, which is a heat insulating material having a low thermal conductivity, keeps a high temperature even if the heat is transmitted to the inserted normal-temperature lead body 8 because the temperature drop is slow. Due to the high temperature, the extensible lead 8 deformed by the static load has a reduced mechanical strength. Therefore, the hollow portion 7, the upper mounting plate 9 and the lower mounting plate 10 follow the contraction of the laminated rubber body 4. (Step 10
7). That is, the volume V ₀ of the lead body 8 at normal temperature and the laminated rubber body 4
The ratio V ₀ / V _S of the hollow portion 7 to the volume V _S at normal temperature is 0.9.
If it is about 8 to 1.02, it will be in close contact without any problem, and the performance of the laminated rubber body 4 will not be hindered.

The ratio V ₀ / V _S between the volume V ₀ of the lead body 8 at room temperature and the volume V _S of the hollow portion 7 of the laminated rubber body 4 at room temperature is set to 1 or more by the above-described manufacturing method. If so, lead body 8
It is preferable to set the temperature of the substrate to below normal temperature before insertion. This is because the lead shrinkage increases as the temperature decreases. Specifically, the linear expansion coefficient of lead is 29.1 × 10 ⁻⁶ (/ ° C.), which is about three times the linear expansion coefficient of iron.
° C, 5.82 × 10 ^-4 at 0 ° C, minus 2
1.16 × 10 ⁻³ at 0 ° C., 1.75 × at −40 ° C.
10 ⁻³ , 2.91 × 10 ⁻³ at −100 ° C., and 5.82 × 10 ⁻³ at −200 ° C. Therefore, the volume shrinkage of the lead body 8 becomes (5.82 × 10 ⁻⁴ ) ³ at 0 ° C., which is 0.2%. Similarly, 0.4% at −20 ° C. and 0% at −40 ° C. .5%, minus 100
It is possible to increase the temperature by 0.9% at a temperature of 1.7 ° C. and 1.7% at a temperature of −200 ° C. Thereby, the degree of adhesion of the lead body 8 can be changed.

In the preferred embodiment of the method for manufacturing a laminated rubber bearing of the present invention described above, a lead molded body is sealed in a laminated rubber body having a hollow portion formed in the center. The present invention is not limited to this, and the same effect can be obtained by encapsulating a lead molded body in a laminated rubber body having a plurality of hollow portions.

Further, in the above-described preferred embodiment of the method for producing a laminated rubber bearing of the present invention,
Although the laminated rubber body in which the outer peripheral edge of each laminated intermediate steel plate 6 was exposed was used, the present invention is not limited to this, and the outer peripheral edge of each laminated intermediate steel plate 6 is covered with the protective rubber layer 15. The same effect can be obtained by using the rubber body 4 (FIG. 5).

[0028]

Next, in the method of manufacturing a laminated rubber bearing according to the present invention, a lead body adheres to a hollow portion, an upper mounting plate and a lower mounting plate of a laminated rubber body without press-fitting under the following conditions. Prove that. The following description is based on the laminated rubber bearing of the steel plate exposed type shown in FIG.

Between the upper connecting steel plate 2 and the lower connecting steel plate 3 having a diameter of 870 mm and a thickness of 40 mm, a diameter of 800 mm
Rubber plate (rubber layer) using natural rubber with a thickness of 6 mm 5: 3
Three sheets and an intermediate steel sheet 6 made of rolled steel for general structural use (SS400) having a diameter of 820 mm and a thickness of 4.5 mm: 32 sheets are alternately laminated, and a hollow portion 7 having a diameter of 159 mm is provided at the center.
Is used, the exposed rubber plate 4 of which the steel plate is exposed is used. The temperature at the time of vulcanization molding is about 120 to 160 ° C., and the product temperature immediately after being removed from the vulcanization molding die is 110 to 15 ° C.
0 ° C.

Here, if the rubber temperature of the laminated rubber body 4 is assumed to be 1
20 ° C., ambient temperature 20 ° C., rubber linear expansion coefficient 5.
Assuming that 4 × 10 ⁻⁴ and the linear expansion coefficient of iron are 11.76 × 10 ⁻⁶ , temperature difference: 120−20 = 100 ° C. Rubber expansion height: 6 mm × 33 layers × 5.4 × 10 ⁻⁴ ( / ° C) × 100 ° C. = 10.692 mm Height of expansion of iron: (4.5 mm × 32 sheets + 40 mm × 2 sheets) × 11.76 × 10 ⁻⁶ (/°C)=0.263 mm Total expansion height: 10 .692 mm + 0.263 mm ≒ 11 mm, and the height of the laminated rubber body 4 is 11 mm higher.
That is, the total height of the laminated rubber body 4 is 433 mm (= 422 + 1).
1 mm).

As a material of the lead body 8 inserted into such a laminated rubber body 4, JIS special pure lead having a purity of 99.99% or more is used. The diameter of the lead body 8 is 157.4 mm (= 159 × 0.1 mm) which is 1% smaller than the diameter of the hollow portion 7 of the laminated rubber body 4.
99). Here, the volume V _S of the hollow portion 7 of the laminated rubber body 4 at room temperature is 8379 cm ² (= (15.9
Since the ^{2 × π / 4) × 42.2} ), consider a safe degree of adhesion, the volume V ₀ which normal temperature of Namaritai 8, the ratio V ₀ which the volume V _S at the normal temperature of the hollow portion 7 Assuming that / V _S is 1.005, the required volume V ₀ of the lead body 8 is 8421 cm ² (= 8379 ×
1.005). Therefore, when the required height of the lead body 8 is obtained from the diameter of the lead body 8, 432.8 mm (= 8
^{421 / (15.74 2 × π /} 4)) to become.

As described above, since the height of the laminated rubber body 4 immediately after removal from the mold and the height of the lead body 8 are substantially equal, the inserted lead body 8 projects from the end of the upper connecting steel plate 2 of the laminated rubber body 4. I will not do it. Therefore, after the mold release, the lower mounting plate 10 is fixed to the lower connecting steel plate 3 of the laminated rubber body 4 with the connecting bolts 11, the lead body 8 is inserted, and the upper mounting plate 9 is further connected to the upper connecting steel plate 2 with the connecting bolts. 11 can be easily fixed. In this state, the laminated rubber body 4 is slowly cooled at room temperature. Rubber with low thermal conductivity, once heated,
It takes a considerable amount of time to cool to room temperature, and when room temperature is 20 ° C., the laminated rubber body 4 after demolding is cooled to room temperature.
It takes about 18 to 48 hours. As a result, the inserted lead body 8 is transferred by heat from the laminated rubber body 4 and becomes high temperature and softens, so that the mechanical strength is reduced to about 1/2. Therefore, the lead body 8 can be brought into close contact with the inner peripheral surface of the hollow portion 7 with a lower load than in the case where the lead body 8 is pressed and brought into close contact, and the degree of adhesion of the lead body 8 is improved.

Even if the inserted lead body 8 protrudes from the end of the upper connecting steel plate 2 of the laminated rubber body 4, if the protruding part is slowly pressed by using a hydraulic device such as a hydraulic jack or a hydraulic press, The lead body 8 can be embedded in the hollow portion 7 of the laminated rubber body 4. Further, if the protrusion is slight, the lead body 8 can be embedded in the hollow portion 7 by the tightening force of the connecting bolt 11 when the upper mounting plate 9 is fixed to the upper connecting steel plate 2 of the laminated rubber body 4.

[0034]

As described above, according to the method for manufacturing a laminated rubber support of the present invention, the hollow portion of the laminated rubber body can be formed without press-fitting the columnar elastic-plastic metal into the hollow portion of the laminated rubber body.
Since it can be in close contact with the upper mounting plate and the lower mounting plate, it is possible to prevent the columnar elasto-plastic metal from rising, drooping, and gaps. As a result, loosening of the connecting bolt after the vertical load is applied can be eliminated, and stable seismic isolation characteristics can be obtained. In addition, the hollow portion can be filled with the columnar elasto-plastic metal by a slow force (shrinkage of the laminated rubber body).

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a laminated rubber bearing manufactured by a manufacturing method of the present invention, wherein (a) is a top view and (b)
Is a sectional view.

FIGS. 2A and 2B are views showing a fixed state of a cap plate used for enclosing a columnar elasto-plastic metal of the laminated rubber bearing of FIG. 1, wherein FIG. 2A is an explanatory view of a bolt fixing method, and FIG. FIG.

FIG. 3 is an explanatory view showing another preferred embodiment of a fixed state of a cap plate used for enclosing the columnar elastic-plastic metal of the laminated rubber bearing of FIG. 1;

FIG. 4 is a flowchart of the method for manufacturing a laminated rubber bearing according to the present invention.

FIG. 5 is a cross-sectional view showing another embodiment of a laminated rubber bearing manufactured by the manufacturing method of the present invention.

FIG. 6 is an explanatory view showing a laminated rubber bearing manufactured by a conventional manufacturing method.

FIG. 7 is an explanatory view showing a problem caused by a conventional method of manufacturing a laminated rubber bearing.

FIG. 8 is an explanatory view showing a problem caused by a conventional method of manufacturing a laminated rubber bearing.

[Explanation of symbols]

1 ···· Laminated rubber bearing body 2 ······················· Lower connected steel plate 4 ..... 6) Intermediate steel plate (rigid material) 7 Hollow portion 8 Lead body (columnar elasto-plastic metal) 9 Upper mounting plate 10 Lower mounting plate V ₀ ····· Volume of lead body at normal temperature V _S ····· Volume of hollow portion of laminated rubber bearing V ₀ / V _S.

Continued on the front page F term (reference) 3J048 AA02 AC06 BA08 BC09 DA01 EA07 EA13 EA38 3J059 AD05 BA43 BC11 DA18 EA14 EA17 GA42

Claims (4)

[Claims] A rubber-like elastic body and a rigid material are alternately laminated and molded between an upper connecting plate and a lower connecting plate.
A laminated rubber body having at least one hollow portion formed therein, a columnar elasto-plastic metal inserted into the hollow portion of the laminated rubber body, and the upper connection plate of the laminated rubber body having the columnar elastoplastic metal inserted therein In manufacturing a laminated rubber bearing body having an upper mounting plate fixed to the lower mounting plate and a lower mounting plate fixed to the lower connecting plate, immediately after vulcanization molding only the laminated rubber body, the cross-sectional shape is the hollow The column-shaped elasto-plastic metal formed in a shape that can be inserted without being pressed into the portion is inserted into the hollow portion, and the column-shaped elasto-plastic metal is inserted into the hollow portion. A method of manufacturing a laminated rubber bearing, wherein the upper mounting plate is fixed to the lower connecting plate, respectively. 2. One of the upper mounting plate and the lower mounting plate is fixed to the corresponding connecting plate in advance before inserting the columnar elasto-plastic metal into the hollow portion. A method for producing a laminated rubber bearing according to claim 1. 3. The ratio V ₀ / V _S between the volume V _{0 of the} columnar elastoplastic metal at room temperature and the volume V _S of the hollow portion at room temperature is 0.9.
3. The method for producing a laminated rubber bearing according to claim 1, wherein the value is set to 8 to 1.02. 4. The laminated rubber bearing according to claim 1, wherein the temperature at which the columnar elasto-plastic metal is inserted into the hollow portion is set at a temperature of not less than −200 ° C. and lower than a normal temperature. How to make the body.