JPH07280031A - Laminated rubber for vibration proof device and its manufacture - Google Patents

Abstract

PURPOSE:To provide the laminated rubber for a vibration proof device where the rubber layer is rarely separated from a steel sheet. CONSTITUTION:In the laminated rubber for a vibration proof device where rubber layers 1 and steel sheets 2 are alternately laminated and adhered to each other, and at least one vertical hole H is provided, a recessed part 10 ranging over the whole circumference is formed in the inner circumferential surface of each rubber layer 1, and the adhesion end part A of the rubber layers 1 and the steel sheets 2 holding the rubber layers on the inner circumferential side is formed of R-shaped section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation device which absorbs vibrations of the ground when an earthquake occurs to minimize the vibration applied to a building and to quickly damp the generated vibration of the building. The present invention relates to a laminated rubber and a manufacturing method thereof.

[0002]

2. Description of the Related Art As a seismic isolation device, for example, as shown in FIG. 5, a laminated rubber G formed by alternately laminating a rubber layer 1 and a steel plate 2 and a mounting member disposed above and below the laminated rubber G. Board T
In this device, a hole H for assembling the lead damper or for positioning the steel plate 2 is provided.

The rubber layer 1 and the steel plate 2 in the peripheral portion of the hole H are adhered in a state as shown in FIG. 5, so that an earthquake occurs and the device changes from the solid line in FIG. 6 to the alternate long and two short dashes line. When the shape changes to a state, the shape of the rubber layer 1 and the steel plate 2 forming the hole H changes accordingly as shown in FIG. 7.
Therefore, there is a problem that stress is concentrated on the inner peripheral side adhesive end A between the rubber layer 1 and the steel plate 2 shown in FIG. 7, and peeling easily occurs on the inner peripheral side adhesive end A.

[0004]

Therefore, it is an object of the present invention to provide a laminated rubber for a seismic isolation device in which a rubber layer and a steel sheet are less likely to separate from each other, and a method for manufacturing the same.

[0005]

According to the present invention, in a laminated rubber for seismic isolation device, which is formed by alternately laminating and bonding rubber layers 1 and steel plates 2, and has at least one vertical hole H, each rubber layer 1 A recessed portion 10 is formed on the inner peripheral surface over the entire circumference, and an inner peripheral side adhesive end portion A of the rubber layer 1 and the steel plate 2 sandwiching the rubber layer 1 is formed in a cross section R shape.

Further, according to the present invention, in the laminated rubber for seismic isolation device, which is formed by alternately laminating and bonding the rubber layers 1 and the steel plates 2, and has at least one vertical hole H, the inner peripheral surface of each rubber layer 1 is A recessed portion 10 is formed over the entire circumference, and an inner peripheral side folding end A of the rubber layer 1 and a steel plate 2 that sandwiches the rubber layer 1 is formed in a cross section R shape, and is not bonded to the recessed portion 10. A rubber ring body 3 that is tightly fitted in the state is loaded.

Further, another invention is a method of manufacturing the latter laminated rubber for seismic isolation device among the above, in which a steel plate having a hole 20 substantially in the diameter of the shaft 4 on the positioning shaft 4 is provided. 2. A rubber ring body 3 having a hole 30 having substantially the same diameter as the shaft 4 and having an R-shaped cross section on the outer peripheral side and having excellent peelability, and a hole 11 having substantially the same outer diameter as the ring body 3. The unvulcanized rubber plate material 1 ′ having the above and the steel plate 2 are externally stacked and laminated, and then, while being heated, the unvulcanized rubber plate material 1 ′ and the steel plate 2 are pressed by pressing in the axial direction of the shaft 4. It is intended to be bonded by vulcanization.

[0008]

The present invention operates as follows.

In the laminated rubber for seismic isolation apparatus of the present invention, the inner peripheral side adhesive end A (the wall side adhesive end of the hole H) between the rubber layer 1 and the steel plate 2 sandwiching the rubber layer 1 is formed in a cross section R shape. Therefore, the stress is not concentrated on the inner peripheral side adhesive end portion A between the rubber layer 1 and the steel plate 2, and therefore the inner peripheral side adhesive end portion A is different from that described in the section of the prior art. It is less likely that peeling will occur.

Further, in the manufacturing method of the invention, the steel plate 2, the ring body 3, the unvulcanized rubber plate material 1 ', and the steel plate 2 are externally stacked on the positioning shaft 4 and laminated, and then the shaft is heated while heating. Four
Since the laminated rubber for seismic isolation device is completed by pressurizing the unvulcanized rubber plate material 1 ′ and the steel plate 2 by vulcanizing and adhering it in the axial direction of Rubber can be manufactured relatively easily.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described with reference to the drawings shown as embodiments.

This embodiment is a seismic isolation device in which a lead damper is press-fitted into a vertical hole in the central portion. This seismic isolation device basically has a laminated rubber G and this laminated rubber G as shown in FIG. It is composed of a mounting plate T provided on the upper and lower surfaces and a lead damper D.

As shown in FIG. 1, the laminated rubber G is formed by alternately laminating and bonding the rubber layers 1 and the steel plates 2, and has a vertical hole H at the center thereof.

As shown in FIG. 1, each rubber layer 1 described above is formed with a hole whose top view substantially coincides with the vertical hole H, and a recessed portion 10 is formed over the entire circumference on the peripheral surface of the hole. There is.
As shown in FIG. 1, the recessed portion 10 is formed in an arc-shaped cross section in which an inner peripheral side adhesive end A of the rubber layer 1 and a steel plate 2 sandwiching the rubber layer 1 is R-shaped in cross section. A ring body 3 having a hole 30 forming a vertical hole H and having an arcuate outer peripheral surface is closely packed in a non-bonded state. In addition, when the ring body 3 uses the manufacturing method described later,
Any material can be used as long as the ring body 3 and the rubber layer 1 are in a non-adhesive state, and for example, one made of fluororesin or one made of silicone rubber can be adopted.

As shown in FIG. 1, the steel plate 2 has a hole 20 forming a vertical hole H, and its outer peripheral surface is formed in an arcuate cross section.

As shown in FIG. 1, the mounting plate T is made of a circular thick steel plate, and a hole t forming a vertical hole H is formed at the center thereof.

As shown in FIG. 1, the lead damper D is formed in a rod shape having a diameter substantially matching the diameter of the vertical hole H, and is attached so as to be press-fitted into the vertical hole H. .

The seismic isolation device of this embodiment can be manufactured relatively easily by the method described below. ． First, an unvulcanized rubber plate material 1'having a hole 11 having a diameter substantially equal to that of the lead damper D, the mounting plate T, the ring body 3, and a hole 11 substantially equal to the outer diameter of the ring body 3 to the positioning shaft 4. Steel plate 2 → ring body 3 → unvulcanized rubber plate material 1 ′ → steel plate 2 → ...
..-> The ring body 3-> the unvulcanized rubber plate material 1 '> The mounting body T is extrapolated in this order (see FIG. 3).

The ring body 3 is kept inserted in the hole 11 of the unvulcanized rubber plate 1 '. ． Next, the intermediate body in the above state is pressed and heated from above and below. Then, the inner peripheral surface of the unvulcanized rubber plate material 1'is formed so as to follow the outer peripheral surface of the ring body 3 having an arcuate cross section, and the unvulcanized rubber plate material 1'is joined to the steel plate 2 and the mounting plate T sandwiching it. Sulfurized and bonded. ． Then, the shaft 4 is pulled out and the lead damper D is press-fitted instead, and the seismic isolation device shown in FIG. 1 is completed.

As described above, when the above method is adopted, the seismic isolation device can be manufactured relatively easily, and the seismic isolation device manufactured in this manner includes the rubber layer 1 and the steel plate 2 sandwiching the rubber layer 1. Since the inner peripheral side adhesive end A (the wall side adhesive end of the hole H) is formed in the shape of a cross section R, the inner periphery of the rubber layer 1 and the steel plate 2 during vibration absorption shown in FIG. Side adhesive end A
Since stress is not concentrated on the inner peripheral side, the occurrence of peeling at the inner peripheral side adhesive end portion A is reduced.

The seismic isolation device can be manufactured by using the ring body 3 having the shape shown in FIG. 4 instead of the shape of the ring body 3 of the above embodiment. In short, the inner peripheral surface of each rubber layer 1 is formed with the recessed portion 10 over the entire circumference, and the inner peripheral side adhesive end A of the rubber layer 1 and the steel plate 2 sandwiching the same is formed in a R-shaped cross section. It is all right.

[0022]

The present invention having the above-mentioned structure has the following effects.

From the contents described in the above operation, it is possible to provide a laminated rubber for a seismic isolation device in which the rubber layer and the steel sheet are unlikely to separate from each other, and a method for producing the same.

[Brief description of drawings]

FIG. 1 is a sectional view of a seismic isolation device using a laminated rubber according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of essential parts when a force in a shearing direction acts on the seismic isolation device.

FIG. 3 is a perspective view for explaining a method of manufacturing the seismic isolation device.

FIG. 4 is a sectional view of another seismic isolation device using the laminated rubber according to the embodiment of the present invention.

FIG. 5 is a cross-sectional view of a prior art seismic isolation device.

FIG. 6 is a diagram when a force in a shearing direction acts on the seismic isolation device.

FIG. 7 is a cross-sectional view of a main part when a force in a shearing direction acts on a conventional seismic isolation device.

[Explanation of symbols]

 1'Unvulcanized rubber plate material 1 Rubber layer 2 Steel plate 3 Ring body 4 Shaft 10 Recessed portion 11 Hole 20 Hole 30 hole

Claims (3)

[Claims] 1. A laminated rubber for seismic isolation device, comprising laminated and bonded rubber layers (1) and steel plates (2) alternately and having at least one vertical hole (H). The inner peripheral surface is formed with a recessed portion (10) all around,
A laminated rubber for seismic isolation device, characterized in that an inner peripheral side adhesive end (A) between a rubber layer (1) and a steel plate (2) sandwiching the rubber layer (1) is formed in a cross section R shape. 2. A laminated rubber for seismic isolation device, comprising laminated rubber layers (1) and steel plates (2) alternately laminated and having at least one vertical hole (H). The inner peripheral surface is formed with a recessed portion (10) all around,
An inner peripheral side adhesive end (A) between the rubber layer (1) and a steel plate (2) sandwiching the rubber layer (1) is formed in a R-shaped cross section, and is closely fitted in the recess (10) in a non-adhesive state. A laminated rubber for seismic isolation device, which is loaded with a rubber ring body (3). 3. The method for manufacturing a laminated rubber for a seismic isolation device according to claim 2, wherein the positioning shaft (4) has a hole (20) substantially matching the diameter of the shaft (4). A ring body (3) made of rubber having a steel plate (2) and a hole (30) substantially matching the diameter of the shaft (4) and having an R-shaped cross-section on the outer peripheral side and having excellent releasability. 3) An unvulcanized rubber plate material (1 ') having a hole (11) substantially matching the outer diameter of 3) and the steel plate (2) are externally inserted and laminated, and then the shaft of the shaft (4) is heated. A method for producing a laminated rubber for seismic isolation device, characterized in that the unvulcanized rubber plate (1 ') and the steel plate (2) are vulcanized and bonded by pressurizing in the axial direction.