JP2761646B2 - Seismic isolation device for buildings - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is installed at the bottom of various buildings to reduce the shaking of the building in the event of an earthquake or to reduce the shaking faster. The present invention relates to a seismic isolation device for a building, which is used for:

[Conventional technology]

Conventional seismic isolation devices for buildings generally comprise a seismic isolation material (isolator) for reducing the shaking and a damper for stopping the shaking quickly, and are separately installed.

In the case of this conventional example, the work process of separately installing the seismic isolation material and the damper becomes complicated, the workability is poor, and the device cannot be installed low.

[Problems to be solved by the invention]

Therefore, according to the present invention, by installing a seismic isolation device in which a seismic isolation material and a damper are incorporated together, the installation work is easy, the building can be installed in a low volume, and the damping action can be adjusted as necessary. To provide a seismic isolation device.

[Means for solving the problem]

Therefore, in the present invention, a seismic isolation device for a building is provided by interposing a hollow seismic isolator between upper and lower soul plates and holding cylinders suspended from the upper soul plate in the hollow portion of the seismic isolator. A damper is provided which presses down the damping bar connected to the lower part of the holding cylinder by a spring disposed on the lower side of the holding tube, and the lower end surface of the damping bar is in contact with the lower soul plate.

In addition, this seismic isolation device for buildings can be implemented by adjusting the spring pressure by screwing an adjusting screw on the upper part of the holding cylinder, and by flattening the lower soul plate surface that contacts the lower end surface of the damping rod. Or, it can be carried out by making it uneven.

(Operation)

The seismic isolation device for buildings with the above configuration incorporates the seismic isolation material and the damper together, so there is no need to separately install the seismic isolation material and the damper during construction, facilitating construction. And can be installed in a compact space. Also, the damping action can be adjusted by changing the spring pressure.

〔Example〕

Hereinafter, the configuration of the present invention will be described with reference to the drawings shown as embodiments.

This seismic isolation device includes a seismic isolation material (1) that loosens and transmits vibration generated by an earthquake or the like to a building, and a damper (3) provided in a hollow portion (2) of the seismic isolation material (1). The structure is designed to reduce the shaking of the building quickly.

The seismic isolation material (1) has a structure in which a steel plate (1a) and rubber (1b) are laminated in multiple layers, and is formed in a substantially cylindrical shape.

The damper (3) presses down the damping rod (7) connected to the lower part of the holding cylinder by a spring (6) arranged on the upper part of the holding cylinder (5) suspended from the upper soul plate (4), The lower soul plate (8) is in contact with the lower end surface of the attenuation rod (7).

That is, a spring (6) is inserted into a holding cylinder (5) fitted and fixed to an upper soul plate (4), and a damping rod (7) made of a high-strength material such as a steel rod is provided below the spring (6).
Insert the upper part of the damping rod (7) by the spring (6).
Is pressed against the lower soul plate (8).

Further, an adjusting screw (9) is screwed into the upper part of the holding cylinder (5), and a necessary spring (6) pressure can be obtained by adjusting the insertion depth of the adjusting screw (9). I have.

In addition, the lower soul plate (8) surface which is in contact with the lower end surface of the attenuation rod (7) can be implemented as a flat shape or an appropriate uneven (10) shape.

Even when the surface of the lower soul plate (8) is flat, the damping bar (7) and the lower soul plate (8) have a frictional resistance. I do.

The irregularities (10) can be formed, for example, by protruding many concentric ribs, by forming many small projections, or in various states.

Next, the usage state of the building seismic isolation device having the above structure will be described.

As shown in Fig. 1, the seismic isolation device is installed between the floor beam (11) and the cradle (12). Reduces vibration transmitted to the building.

When the earthquake ends, the shaking of the building is transmitted to the damping bar (7) via the holding cylinder (5), and the damping bar (7) shakes.
Since the lower end surface of the damper bar (7) is in contact with the lower soul plate (8), the damper bar (5) rubs against the lower soul plate (8) surface with large frictional resistance due to shaking. Due to this frictional resistance, the swing of the building connected to the damping rod (7) and the holding cylinder (5) is quickly stopped.

In addition, it is desirable to form a surface layer such as a fluororesin on the inner surface of the holding cylinder (5) in order to reduce the frictional resistance with the damping rod (7).

〔The invention's effect〕

The present invention has the above-described configuration. Therefore, since the seismic isolation member (1) and the damper (3) are incorporated together, the construction is easy and the device can be installed compactly and low-volume. Further, it is possible to adjust the strength of the damping effect by changing the spring (6) pressure.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a seismic isolation device according to the present invention. FIG. 2 is an exploded perspective view of a damper. (1) ... seismic isolation material, (2) ... hollow part, (3) ... damper, (4) ... upper soul plate, (5) ... holding cylinder, (6) ... spring, (7) )… Attenuation rod, (8)… Lower soul plate, (9)… Adjustment screw, (10)… Unevenness

Claims (4)

(57) [Claims] 1. A hollow seismic isolator is interposed between soul plates arranged vertically and in a hollow portion of the seismic isolator,
A damper is provided which presses down a damping rod connected to the lower part of the holding cylinder by a spring disposed on the upper part of the holding cylinder which is suspended from the upper soul plate. A seismic isolation device for buildings, characterized in that: 2. The seismic isolation device for a building according to claim 1, wherein an adjusting screw is screwed into an upper portion of the holding cylinder to adjust a spring pressure. 3. The seismic isolation device for a building according to claim 1, wherein the lower soul plate surface in contact with the lower end surface of the damping bar has a flat shape. 4. The seismic isolation device for a building according to claim 1, wherein the lower soul plate surface in contact with the lower end surface of the damping bar has an uneven shape.