JPH0957763A - Manufacturing method of laminated rubber seismic isolation support - Google Patents

Abstract

(57) Abstract: To provide a method capable of easily manufacturing a laminated rubber seismic isolation support having low horizontal rigidity and high buckling strength. In manufacturing a laminated rubber seismic isolation support in which annular rubbers 11 or annularly arranged rubbers 11 and rigid plates 12 are alternately laminated, and these rubbers 11 and rigid plates 12 are vulcanized and bonded. The ventilation holes 14 communicating with the central space 13 of the rubber are formed in the rigid plate 12 alternately laminated with the rubber 11, and the pressurized gas is supplied from the ventilation holes 14 of the rigid plate 12 in the uppermost layer or the lowermost layer. Send rubber 1
The pressure in the central space 13 of 1 is increased, and in this state, the rubber 11 and the rigid plate 12 are vulcanized and bonded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a base isolation support in which rubber and rigid plates such as steel plates are alternately laminated.

[0002]

2. Description of the Related Art A laminated rubber seismic isolation support is known as a support (support) used for seismic isolation of a structure. One example is shown in FIG. In FIG. 4, reference numerals 1 and 2 denote upper and lower flanges, which are formed by a circular steel plate or the like.
And annular steel plates (rigid plates) 4 are alternately laminated and arranged, and the flanges 1 and 2, the rubber 3 and the steel plate 4 are vulcanized and adhered to each other. When manufacturing the so-called cylindrical seismic isolation support as shown in FIG. 4, it is necessary to apply a compressive load to the rubber 3 and the rubber and the adhesive are softened during vulcanization adhesion. Cylindrical molds 6 and 7 are arranged on both inner and outer peripheral sides of the rubber 3 and the steel plate 4 thus laminated, and heat and pressure are applied in that state to bond and integrate them.

[0003]

In the above-mentioned so-called cylindrical type laminated rubber seismic isolation support, the rubber has an annular shape and its cross-sectional area is small, so that the horizontal isolation of the seismic isolation support as a whole is improved. It can be made small and suitable for lightweight structures. However, the steel plate 4 interposed between the rubber 3
Also, since the upper and lower flanges 1 and 2 are sheared by being horizontally displaced due to the annular shape, the strength against a vertical load is weak and, as a result, there is a possibility of buckling.

In order to eliminate such an inconvenience, it is considered that the rubber layer has an annular shape, but the rigid plate arranged between them is a flat plate having no through hole. In such a laminated rubber seismic isolation support, the space formed at the center of the rubber layer is shielded by the steel plate to form a closed space. Therefore, when manufacturing this type of laminated rubber seismic isolation support, the inner mold used in the above-described conventional manufacturing method cannot be placed in the center side space part, and the rubber layer is bonded during vulcanization adhesion. On the other hand, there is a problem that it is difficult to apply pressure from the inner and outer peripheral sides.

The present invention has been made in view of the above circumstances, and annular rubbers or rubbers arranged in an annular shape and rigid plates that block the central space in the upper and lower rubber layers are alternately laminated. An object of the present invention is to provide a method capable of vulcanizing and adhering the rubber of each layer by applying pressure from the inner circumferential side to the laminated rubber seismic isolation support.

[0006]

In order to achieve the above-mentioned object, the invention described in claim 1 is such that annular rubber or annularly arranged rubber and rigid plates are alternately laminated, and In manufacturing a laminated rubber seismic isolation support obtained by vulcanizing and adhering a rubber and a rigid plate, the rigid plate alternately laminated with the rubber is formed with a vent hole communicating with the central space of the rubber, and the uppermost layer. Alternatively, it is characterized in that pressurized gas is fed from the ventilation hole of the lowermost rigid plate to increase the pressure in the central space of the rubber, and in that state, the rubber and the rigid plate are vulcanized and bonded.

The invention described in claim 2 is the same as claim 1.
In the invention described in, inside the central hollow portion,
It is characterized in that a flexible sealing material that makes an airtight state between the rubber and the rigid plate is arranged, and the pressurized gas is fed into the inside of the sealing material.

Therefore, according to the method of the present invention, when heat and pressure are applied in order to vulcanize and bond the rubber and the rigid plate, the pressure in the central space portion of the rubber of each layer is caused by the pressurized fluid sent into the space. Therefore, it is possible to apply pressure to each rubber and to perform vulcanization bonding without causing protrusion deformation to the center side space of each rubber layer and flow of the adhesive.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be specifically described with reference to the drawings. The laminated rubber seismic isolation support object of the present invention is such that the rubber layers laminated between the upper and lower flanges form an annular shape, and the rigid plate (reinforcing plate) interposed between the rubber layers is the upper and lower rubber layers. It has a flat plate-like structure that shields the space on the center side of the layer. Therefore, first, as shown in FIG. 1, an annular rubber layer 11 is formed on the upper surface of the disk-shaped lower flange 10.
And the rigid plate 12 are alternately laminated. Rubber layer 11
May be made of an annular rubber, or an arc-shaped rubber with or without a gap,
They may be arranged side by side in a ring shape. The rigid plate 12 is made of a circular steel plate having an outer diameter equal to the outer diameter of the rubber layer 11 and the like, and is located near the center of the rigid plate 12 (more specifically, in the central space 13 of the rubber layer 11). Vent holes 14 are formed penetrating the corresponding portion).

An upper flange 15 is installed above the rubber layer 11 and the rigid plate 12 laminated in this way. Like the lower flange 10, the upper flange 15 is a circular plate made of a steel plate or the like, and a high pressure air hose 16 is connected to the center of the plate. The upper and lower flanges 1
Rubber layer 11 and rigid plate 12 laminated between 0 and 15
A cylindrical outer mold 17 having a divided structure is attached to the outer peripheral side of the in close contact. The high pressure air hose 16 is connected to a high pressure air cylinder 18.
An adhesive is applied to the upper and lower surfaces of each rubber layer 11.

As shown in FIG. 1, when the upper and lower flanges 10 and 15 are loaded in the axial direction in the set state and high-pressure air is sent from the high-pressure air cylinder 18, the ventilation holes 14 are formed in the rigid plate 12 described above. Due to the formation of the high pressure air, high-pressure air is sent into the central space 13 of each rubber layer 11, and the pressure thereof increases. On the other hand, since each rubber layer 11 is clamped from the outer peripheral side by the outer mold 17, each rubber layer 11 is maintained in a state of being pressed in the radial direction and the axial direction, and heat is generally applied here. In addition, when the temperature is raised, the rubber layer 11 is vulcanized and adhered to the flanges 10 and 15 and the rigid plate 12 under pressure.
Then, after cooling, the high pressure air is discharged, and the outer mold 17 is removed to complete the manufacturing work. Further, it goes without saying that the high pressure air hose 16 is removed from the upper flange 15.

Therefore, in the laminated rubber seismic isolation support obtained by the above-mentioned manufacturing method, the rubber layer 11 has an annular shape, but the rigid plate 12 interposed therebetween has a flat plate shape crossing the center side space portion 13. Therefore, the horizontal rigidity can be reduced and the buckling strength can be increased at the same time. Even if the rigid plate 12 blocks the central space 13, the rubber layer 11 is vulcanized and adhered under pressure, so that it has excellent seismic isolation characteristics.

In the present invention, the pressurized gas is not limited to the high pressure air supplied from the high pressure air cylinder 18, and as shown in FIG.
Alternatively, the high pressure air pump 19 may be used. When it is necessary to more positively prevent the rubber layer 11 and the adhesive from protruding into the central space 13, it is necessary to insert the flexible sealing material 20 into the central space 13 shown in FIG. Good. The sealing material 20 is preferably used in the form of a bag having excellent airtightness, for example, and is communicated with the ventilation holes 14 in the rigid plate 12, respectively. By doing so, the pressurized gas supplied from either the upper or lower flanges 10 and 15 is sent into the respective sealing members 20 and expands, so that the sealing members 20 are placed in the central space portion of each rubber layer 11. 13 is filled, and each rubber layer 11 is pressed from the inside toward the outside. As a result, the rubber layer 11
It is possible to reliably prevent the deformation of the adhesive to the center side and the protrusion of the adhesive.

In the above example, the upper flange 15
Although the pressurized gas is supplied from the above, the present invention is not limited to the above embodiment, and the pressurized gas may be supplied to the center side space portion 13 from either the upper or lower flanges 10 and 15. In addition to air, other gas such as nitrogen gas may be used as the pressurized gas.

[0015]

As described above, according to the method of the present invention, even if the center side space of each laminated rubber layer becomes an independent closed space, the rubber does not flow. Can be vulcanized and bonded. Further, since the inner mold is not used, the number of molds required is reduced and the manufacturing cost can be reduced. Furthermore, since pressurized gas is used instead of the inner mold, the manufacturing work only needs to be done by attaching and detaching the supply hose for pressurized gas, which simplifies the manufacturing work and also reduces the manufacturing cost. Can be achieved. According to the method of the present invention, since the rigid plate has a flat plate shape that blocks the center side space portion with respect to the annular rubber layer, it is possible to obtain a seismic isolation support having low horizontal rigidity and being less likely to buckle.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view for explaining an implementation situation of a method of the present invention.

FIG. 2 is a schematic cross-sectional view showing another example in which the pressure supply source is changed.

FIG. 3 is a schematic cross-sectional view showing an example in which a sealing material is inserted in a central space portion.

FIG. 4 is a sectional view schematically showing a manufacturing process of a conventional cylindrical laminated rubber seismic isolation support.

[Explanation of symbols]

11 ... Rubber layer, 12 ... Rigid plate, 14 ... Vent hole, 1
8 ... High pressure air cylinder, 19 ... High pressure air pump.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location // F16F 1/36 F16F 1/36 B B29K 21:00 B29L 31:10 (72) Inventor Imai Takayuki Tokyo, Koto-ku, Tokyo 1-5-1, Kiba Co., Ltd. (72) Inventor Tomohisa Watanabe 1-1-5, Kiba, Koto-ku, Koto-ku, Tokyo Fujikura Co., Ltd. (72) Inventor Akira Masui Koto, Tokyo 1-5-1, Kiba, ward Fujikura stock company

Claims (2)

[Claims] 1. When manufacturing a laminated rubber seismic isolation support in which annular rubber or rubber arranged annularly and rigid plates are alternately laminated, and these rubber and rigid plates are vulcanized and bonded, Ventilation holes that communicate with the central space of the rubber are formed in the rigid plates that are stacked alternately.Pressurized gas is sent from the ventilation holes of the uppermost or lowermost rigid plates to pressurize the central space of the rubber. A method for manufacturing a laminated rubber seismic isolation support, characterized in that the rubber and the rigid plate are vulcanized and adhered in that state. 2. A flexible seal member is disposed inside the hollow portion on the center side so as to establish an airtight state between the rubber and the rigid plate,
The method for manufacturing a laminated rubber seismic isolation support according to claim 1, wherein the pressurized gas is sent inside the sealing material.