JP3253261B2 - Seismic isolation device - Google Patents

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 interposed between an upper frame of a building and a foundation for preventing vibration energy such as a large earthquake from being transmitted to the building.

[0002]

2. Description of the Related Art Since Japan is an earthquake country, many damages have been caused by earthquakes, and particularly damage to buildings and the like has caused a great loss. Therefore, as a countermeasure against building earthquakes, improvements have been made such as strengthening the frame, but in recent years, seismic isolation devices have been developed instead of these to prevent the vibration energy of the earthquake from being transmitted to the building.

In this seismic isolation device, an elastic support 33 having a rubber layer 31 and a steel plate 32 alternately bonded thereto has a large diameter or a small diameter as shown in FIGS. Board 3
4 and a lower end plate 35, which are interposed between the foundation 36 and the upper frame 37 of the building.

[0004]

However, among the above seismic isolation devices, those having a small diameter in (2) have a secondary shape factor (a value obtained by excluding the diameter by the total rubber thickness: the larger the value, the higher the stability). When the horizontal displacement increased due to a large horizontal force due to a large earthquake, there was a possibility that the load on the upper frame could not be fully supported and buckling occurred.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a seismic isolation device having a small secondary shape factor, which receives a large horizontal force due to a large earthquake or the like and causes a large horizontal displacement. In this case, the buckling phenomenon is not caused by bearing the load of the upper frame.

[0006]

Seismic isolation device of the present invention in order to solve the above problems BRIEF SUMMARY OF THE INVENTION, the substrate and stand on both sides
The rubber layer and the steel plate are
The laminated body adhered to each other is bonded to form a protective unit
By connecting a plurality of the protection unit,
Penetrated in the axial direction and gradually narrowed downward
Forming an elastic protective body having a closed space.
Elasticity in which rubber layers and steel plates are alternately bonded to the body space
The support is fitted, and the elastic support comprises an upper end plate and a substrate.
And bonding plate are formed from the inner surface of the laminate to the outside
Between the lower end plate inserted into the gap
Interposed between the body and the foundation, and by forced displacement
It contacts the inner surface of the space and is integrated with the elastic protective body.
It is characterized by supporting the body .

In the seismic isolation device of the present invention, the elastic protective body is forcibly displaced in the horizontal direction as the elastic support is forcibly displaced in the horizontal direction by vibration energy during an earthquake. At this time, the elastic support that has been forcibly displaced comes into contact with the inner surface of the space of the elastic protector, increasing the diameter of the elastic support, supporting the load of the upper frame via the contact surface and eliminating the buckling phenomenon. I do.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the seismic isolation device of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of the seismic isolation device of the present invention, and FIG. 2 is a perspective view of an elastic protective body.

A seismic isolation device 1 is composed of a cylindrical elastic protective body 2 and an elastic support 3 fitted into the elastic protective body 2, and as shown in FIG. 5 to reduce the force applied to the upper skeleton 5 during an earthquake.

The elastic protection body 2 is formed by joining four protection body units 6 which are divided into four parts, and a space 7 penetrating in the axial direction at the center gradually narrows downward.
The protector unit 6 is formed by bonding a laminate 10 in which a quarter-circle rubber layer 8 and a quarter-circle steel plate 9 are alternately laminated to each other in a frame 13 of a substrate 11 and a joining plate 12. I have. Accordingly, the cylindrical elastic protective body 2 as shown in FIG. 2 is formed by bolting the protective body unit 6 with the bonding plate 12.

As shown in FIG. 1B, the front surface of the bonding plate 12 is located outside the inner surface of the laminate 10 and the substrate 11 is located slightly outside the inner surface of the laminate 10. A gap 14 for inserting the lower end plate of the elastic support 3 to be inserted is secured.

The elastic support 3 fitted in the space 7 of the elastic protective body 2 has a circular rubber layer 16 and a circular steel plate 1.
7 are alternately overlapped to form a laminated shape, and the upper and lower surfaces of the upper end plate 18 and the lower end plate 1 larger than the rubber layer 16 are formed on the upper and lower surfaces.
9 are provided respectively. The upper end plate 18 is connected to the upper skeleton 5 and the lower end plate 19 is connected to the base 4 with bolts, so that the elastic support 3 is attached between the base 4 and the upper skeleton 5 to support the upper skeleton 5. are doing.

Therefore, when a relative displacement in the horizontal direction occurs between the foundation 4 and the upper skeleton 5 due to a large earthquake, the elastic support 3 between the foundation 4 and the upper skeleton 5 is forcibly displaced as shown in FIG. When the displacement exceeds a certain level, the elastic protective body 2 is also forcibly displaced in the horizontal direction, and the elastic support 3 and the elastic protective body 2 are integrally supported to support the upper frame 5. This integration is achieved by the forcedly displaced elastic support 3 coming into contact with the inner surface of the space 7 of the elastic protective body 2, and the diameter of the elastic support 3 is increased to eliminate the buckling phenomenon.

The elastic protector 2 includes the elastic support 3
Is installed between the foundation 4 and the upper frame 5, and then the protective unit 6 is combined so as to surround the elastic support 3. In addition, the elastic protective body 2 is not fixed to the foundation 4 in principle, but may be bolted with a fixing tool 20 as shown in FIG. In addition, the elastic protective body 2 is not limited to four divisions, may be a half division, or may be formed integrally without division.

[0015]

According to the present invention, the elastic protective body is forcibly displaced in the horizontal direction along with the forcible displacement of the elastic support in the horizontal direction due to vibration energy during an earthquake. The elastic support that has been forcibly displaced at this time
By contacting the inner surface of the space portion of the elastic protection body, the diameter of the elastic support body is increased to support the load of the upper frame, thereby eliminating the buckling phenomenon.

[Brief description of the drawings]

1 is a sectional view of a seismic isolation device of the present invention, and (2) and (3) are partially omitted sectional views of the seismic isolation device.

FIG. 2 is a perspective view of the seismic isolation device.

FIG. 3 is a cross-sectional view of the seismic isolation device horizontally displaced.

FIG. 4 is a front view of a conventional seismic isolation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seismic isolation device 2 Elastic protective body 3 Elastic support 4 Foundation 5 Upper frame 6 Protector unit 7 Space 8 Rubber layer 9, 17 Steel plate 18 Upper plate 19 Lower plate

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04H 9/02 331 E04B 1/36

Claims (1)

(57) [Claims] 1. A method comprising: a substrate and bonding plates erected on both sides thereof;
A laminated body in which a rubber layer and a steel plate are alternately bonded in a frame
Are adhered to form a protection unit, and the protection unit is formed.
When a plurality of sockets are connected,
And has a space gradually narrowed toward the bottom
An elastic protector is formed, and rubber is provided in a space of the elastic protector.
Elastic support with alternating layers and steel plates fitted
The elastic support laminates the upper end plate, the substrate and the bonding plate.
Insert into the void formed from the inner surface of the layer body to the outer side
Between the upper frame and the foundation.
Interposed and contact the inner surface of the space by forced displacement
A seismic isolation device that supports the upper frame integrally with the elastic protector .