JPH0826590B2 - Seismic isolation device manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to a structure such as a building, or various equipments, by reducing the vibration energy transmitted from the foundation of the structure or equipments. The present invention relates to a method for manufacturing a seismic isolation device that protects against earthquakes and vibrations.

"Prior Art" Conventionally, as a device for suppressing vibrations that act on buildings and vibrations that act on various devices, seismic isolation devices that are composed of alternating laminates of elastic plates and metal plates are known.

FIG. 6 shows an example of a conventionally known seismic isolation / vibration isolator of this type. This seismic isolation / vibration isolator A is formed by laminating a metal plate 1 and an elastic plate 2 having the same outer diameter. It is a structure that constitutes the body 3 and sandwiches the upper and lower surfaces of the laminated body 3 with the flanges 4, and is used by being arranged between the building and the foundation or between the equipment and the foundation.

By the way, in the conventional seismic isolation device A, the elastic plate 2 is generally formed from a composition based on natural rubber. However, since the composition is a semi-solid state, in order to manufacture the elastic plate 2, after the composition is mixed with the vulcanizing agent using a device such as a two-roll or Banbury,
Sheet metal of a predetermined thickness is divided by two rolls or calender rolls and laminated alternately with the metal plate 1, after which it is fixed in a mold and pressed in a press or steam pot to form a high temperature heat-molded metal plate. It was necessary to increase the adhesiveness with 1.

"Problems to be solved by the invention" That is, in order to manufacture the seismic isolation device A by the conventional method, in order to perform high-pressure heat molding, rubber flow due to molding pressure and distortion of the metal plate 1, Has a problem that it is difficult to uniformly fill and permeate the rubber between the metal plates 1 due to the influence of distortion of the metal plate due to thermal expansion and contraction of the rubber and lack of reproducibility. There is a problem that it is difficult to continuously manufacture the vibration isolation device. Further, in the above-mentioned conventional method, there is a problem that the product becomes extremely expensive because equipment such as a large and expensive roll is required in the rubber compounding step and the step of dispensing the rubber into a sheet. .

The present invention has been made in view of the above problems, and an object thereof is to provide a manufacturing method capable of continuously and inexpensively manufacturing a seismic isolation device with stable quality.

"Means for Solving Problems" In order to solve the problems, the present invention makes two flange plates face each other at a predetermined interval via a plurality of separators, and a plurality of separators are provided between the plurality of separators. The metal plates are sandwiched at a predetermined interval from each other so as to be parallel to the flange plate, after which the whole is stored in a container, between the flange plate and the metal plate in the container, and the Liquid rubber is impregnated into the space between the metal plates, and then the liquid rubber is cured, and the separator is removed after the liquid rubber is cured.

"Operation" Since the elastic plate is formed by using liquid rubber, liquid rubber can be uniformly filled and penetrated between metal plates at room temperature, and it is possible to manufacture seismic isolation and vibration isolation equipment with stable quality, and it is necessary in the past. A large and expensive device such as the above-mentioned roll is not required, and the manufacturing cost can be reduced.

“Example” FIGS. 1 to 5 are seismic isolation devices A shown in FIG.
5 is a view for explaining an embodiment of the present invention applied to a method for manufacturing a seismic isolation device having the same structure as that of FIG.

To manufacture this seismic isolation device, first, a flange plate 10 and a separator 11 as shown in FIGS. 1 to 3 are prepared.

The flange 10 is made of a metal disk such as an iron plate, and on the outer peripheral surface thereof, through holes 10a are formed at 120 ° intervals in the circumferential direction of the flange 10 as shown in FIG. The separator 11 has a rod-shaped main body 12 as shown in FIG.
And a support shaft 13 projecting from the center of the end faces of both ends of the main body 12 in the longitudinal direction, and a comb-shaped support portion 14 is formed on one side surface of the main body 12. The support shaft 13 is formed in such a size that it can be fitted into the insertion hole 10a of the flange 10.

Here, first, the two flanges 10 and the separator
Three metal plates 15 are prepared, and a large number of metal plates 15 having a smaller diameter than the flange 10 are prepared. Then, between the flanges 10 and 10 opposed in parallel, the support shaft 13 is fitted into the insertion hole 10a of the flange 10 and the separator 11 is arranged at a right angle to the flange 10, and the comb-shaped support portion of the separator 11 is provided. A metal plate 15 ... Is fitted in 14 as shown in FIG.

Next, a container 17 shown in FIG. 4 is prepared, the container 17 is filled with a liquid rubber 18 such as liquid silicone rubber, and the assembly 16 is immersed in the liquid rubber 18. Next, the container 17 is transferred to the inside of a bell jar (pressure adjusting container) 19 capable of depressurizing,
The bell jar 19 is hermetically sealed and the inside of the bell jar 19 is depressurized for a predetermined time, and then the assembly 16 is taken out from the bell jar 19 and left at room temperature or under relatively low temperature heating for a predetermined time (for example, several hours to several tens hours).

By this operation, the liquid rubber 18 is cured and elastic plates are formed between the metal plates 15 and between the metal plates 15 and the flange 10. Here, the liquid rubber 18 has high fluidity as compared with the conventionally used natural rubber, and therefore uniformly penetrates into the gap between the metal plates 15 and the gap between the metal plate 15 and the flange 10. . Therefore, the elastic plate formed and the metal plate 15 and the flange 10 are sufficiently brought into close contact with each other. The liquid rubber exhibits fluidity at room temperature and exhibits rubber elasticity after curing, and examples thereof include silicone rubber, urethane rubber, polysulfide rubber, and polybutadiene rubber. Among these, silicone rubber and urethane rubber are
The crosslinking reaction is easy to control, and the physical properties of rubber after curing are stable, making it suitable for manufacturing seismic isolation devices. Further, among the silicone rubber and the urethane rubber, the hardness is relatively low, which is suitable for seismic isolation devices, and the high tan δ value (loss factor: characteristic value of the rubber material. It is preferable to select a composition having a composition capable of evaluating the damping characteristics. In this way, by adjusting the composition of liquid rubber,
Since the tan δ value can be adjusted, a tan δ value that is more preferable than natural rubber can be selected, and a seismic isolation device with excellent characteristics can be manufactured.

Next, after a lapse of a predetermined time, the separator 11 is removed, and the silicone rubber on the outer side of the metal plate 15 is cut and removed to obtain a seismic isolation device having the same structure as the seismic isolation device shown in FIG. A vibration damping device can be manufactured.

If the seismic isolation and vibration isolator is manufactured using liquid rubber in this manner, the liquid rubber is made to penetrate uniformly into the gap between the metal plates 15 and the gap between the flange 10 and the metal plate 15. The elastic plate can be sufficiently brought into close contact with the flange 15 and the flange 10, and a seismic isolation device with stable quality can be manufactured. Further, the liquid rubber 18 is cured at room temperature or in a few hours to several tens of hours by leaving it under heating at a relatively low temperature, so that the high temperature heating / pressurizing operation which is conventionally performed for curing becomes unnecessary, Since expensive devices such as two rolls, calender rolls, presses, steam pots, etc., which are conventionally required, are not required, there is an effect that the manufacturing cost can be reduced. Since the high temperature heating and pressing operation is not required, the problem of manufacturing unevenness due to the distortion due to the thermal deformation of the metal plate or the flange can be suppressed, and the seismic isolation device with stable quality can be manufactured.

However, in the above embodiment, as a means for filling the liquid rubber 18 between the metal plates, the liquid rubber filled in the container 17 is used.
Although the means for charging the assembly 16 into the 18 is used, the filling means is not limited to this, and the assembly 16 is installed in a mold and a method of injecting liquid rubber to naturally impregnate it, or The method of pressure-filling or vacuum-filling the liquid rubber into this mold can be appropriately selected.

"Production Example 1" Diameter 132m coated with Primer No. 100AB (trade name of primer for silicone rubber manufactured by Shin-Etsu Scientific Co., Ltd.)
Assemble an assembly as shown in FIG. 1 by using 29 iron plates of m and 0.3 mm in thickness, three separators supporting the iron plates, and two iron plate flanges.

This assembly is fixed in a container having the same structure as the container shown in FIG. 4, and is further installed inside the bell jar having the same structure as the bell jar shown in FIG. Meanwhile, silicone rubber
KE1300 (Shin-Etsu Chemical Co., Ltd. product name) and catalyst Cat1300L
-3 (product name of Shin-Etsu Chemical Co., Ltd.) was mixed with a stirrer and a defoamer into the container, and the inside of the bell jar was further depressurized for 1 hour under reduced pressure. Then remove the container from the bell jar and leave it overnight to cure the rubber, then remove the assembly from the container and remove unnecessary rubber parts by cutting, seismic isolation protection consisting of 31 layers of iron plate and 30 layers of rubber layer. I got a shaker.

The maximum horizontal displacement was determined by autograph using a jig to measure the adhesive strength of the laminated part of the seismic isolation device.
A deformation test was conducted by repeatedly applying deformation at 60 mm, but no fracture between the metal plate and rubber could be confirmed. Also, when the seismic isolation device was vertically cut and the lamination state of the laminated body portion was observed, the thickness of each rubber layer was uniform in all 30 layers, and no distortion of the iron plate was observed. When the horizontal spring constant and the vertical spring constant of this seismic isolation device were measured, the values shown in Table 1 below were obtained.

However the inventors have, that preferably horizontal spring constant as base isolation vibration damping device of the structure be about 80~120kgf / cm ^2, the preferred vertical spring constant is 1.5 × 10 ⁵ kgf / cm ² approximately I'm confirming. By the way, in the case where the seismic isolation device having the above structure is manufactured using natural rubber, the horizontal spring constant is 158 × 165 kgf / cm ² and the vertical spring constant is 5.8 × 10 ⁴
It is about 7.9 × 10 ⁴ kgf / cm ² .

From the results shown in Table 1, as described above, the silicone rubber KE
It has been revealed that the seismic isolation device manufactured using 1300 satisfies the preferable characteristic condition described above in its spring characteristics.

"Production Example 2" An iron plate having the same dimensions as the iron plate used in Production Example 1,
A primer S (product name of Shin-Etsu Chemical Co., Ltd.) is applied, and a comb-blade separator is used to form an assembly equivalent to that of Production Example 1. On the other hand, KE1042 and Cat1402 (both trade names of Shin-Etsu Chemical Co., Ltd.) are mixed with a stirrer and a defoamer,
Vacuum filling was performed inside a bell jar equivalent to the bell jar of Production Example 1. After that, cure at room temperature for 1 week,
As in the case of Production Example 1, the unnecessary rubber part was removed and the iron plate
A seismic isolation device consisting of 31 layers and 30 rubber layers was obtained. This seismic isolation device was subjected to a maximum horizontal displacement of 60 mm, but no fracture was observed between the metal plate and the rubber layer. The horizontal and vertical spring constants of this seismic isolation device were measured and found to be 120 kgf / cm ² for horizontal spring constant and 2 for vertical spring constant.
It shows × 10 ⁵ kgf / cm ^2, and it has been clarified that it satisfies the sufficient characteristics as a seismic isolation device.

"Production Example 3" While constructing an assembly equivalent to that of Production Example 1, 2.26 parts by weight of mocha (Takeda Pharmaceutical Co., Ltd. product name) and 2.51 parts by weight of triisopropanolamine were uniformly dissolved in advance at 80 ° C to perform defoaming. In addition, 100 parts by weight of Takenate L-127C (product name of Takeda Pharmaceutical Co., Ltd.) and 20 parts by weight of benzoflex 988 (product name of Takeda Pharmaceutical Co., Ltd.) are uniformly mixed to obtain 90 ° C.
The mixture degassed in 1. was mixed and pressure-filled in a bell jar in which a container containing the assembly was installed. Next, the container was taken out from the bell jar and heat-cured at 110 ° C. for 5 hours. Thereafter, the unnecessary rubber portion was uniformly removed in the same manner as in Production Example 1 to obtain a seismic isolation device. As a result of measuring the horizontal spring constant and the vertical spring constant of this seismic isolation device, the horizontal spring constant is 100 kgf / cm ² and the vertical spring constant is 1 × 100 ⁵ kgf / cm ² . It was In addition, the seismic isolation device was subjected to a maximum horizontal displacement of 60 mm using an autograph, but no rupture of the rubber part was observed. further,
When the seismic isolation device was divided vertically and the lamination state of the laminated portion was observed, the thickness of each rubber layer was uniform and no distortion of the iron plate was observed.

[Advantages of the Invention] As described above, the present invention is for molding an elastic plate using liquid rubber when manufacturing a seismic isolation device that is a laminated structure of an elastic plate and a metal plate. In addition, as compared with the seismic isolation device that was manufactured using natural rubber, the gap between the metal plates can be uniformly filled with liquid rubber, and an elastic plate with a uniform thickness can be obtained. According to the method of the present invention, it is not necessary to perform the high temperature heating and pressurizing treatment which has been conventionally performed, and it is possible to manufacture the seismic isolation vibration isolator having high adhesion between the metal plate and the elastic plate. Since it is possible to suppress the thermal deformation and distortion of the metal plate as much as possible, when the liquid rubber cures, the adhesion with the metal plate is enhanced, and the seismic isolation and vibration isolation device with stable quality can be continuously manufactured. Also, the liquid rubber can easily flow into the gap between the metal plates evenly at room temperature. Since it spreads, the equipment cost can be reduced as compared with the conventional method in which a special pressurizing device and a heating device are required, and there is an effect that the seismic isolation device can be manufactured at low cost.

[Brief description of drawings]

1 to 5 are for explaining one embodiment of the present invention. FIG. 1 is a side sectional view of an assembly, FIG. 2 is a plan view, and FIG. 3 is a side view of a separator. FIG. 4 is a perspective view showing a state in which the assembly is housed in a container, FIG. 5 is a sectional view showing a state in which the container is installed in a bell jar, and FIG. 6 is a side view of a seismic isolation device. A: Seismic isolation device, 10 ... Flange, 11 ... Separator, 15 ... Metal plate, 16 ... Assembly, 17 ... Container, 18 ...
Liquid rubber, 19 …… Bell jar.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Imai 2-13-1, Isobe, Annaka City, Gunma Prefecture Shin-Etsu Chemical Co., Ltd. Silicone Electronic Materials Research Laboratory (72) Inventor Tsutomu Nakamura Annaka Gunma Prefecture 2-13-1, Isobe, Ichi, Shin-Etsu Chemical Co., Ltd. Silicon Electronic Materials Research Laboratory

Claims (1)

[Claims] 1. Two flange plates are opposed to each other at a predetermined interval via a plurality of separators, and a plurality of metal plates are mutually predetermined so as to be parallel to the flange plates between the plurality of separators. It is sandwiched at intervals, after which the whole is stored in a container, between the flange plate and the metal plate in this container, and, the space between the metal plates is impregnated with liquid rubber, then the liquid rubber A method of manufacturing a seismic isolation device, comprising: curing and removing the separator after curing the liquid rubber.