JPH04363463A - Sliding bearing type base isolation device - Google Patents

Abstract

PURPOSE:To prevent galling of a sliding bearing by interposing an elastic body between the sliding bearing installed on a foundation floor and a base isolation floor so as to enable the sliding bearing to be tilted, and making the sliding face of the sliding bearing always coincide with the upper face of a sliding plate. CONSTITUTION:A sliding plate 3 is disposed on the block 2 of a foundation floor 1 and a base isolation floor 4 is supported via a sliding bearing 5. An elastic body 9 is interposed between the sliding bearing 5 and the base isolation floor 4 so that the sliding bearing 5 is tilted. Even if the elastic body 9 is deformed by the action of large loads, etc., a spherical seat is rotated and tilted in such a manner that the sliding face of the sliding bearing always coincides with the upper face of the sliding plate 3. Galling of the sliding bearing 5 is thereby prevented and the life of the device can be extended.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding bearing type seismic isolation device.

0002

[Prior Art] Fig. 4 shows an example of a conventional sliding bearing type seismic isolation device, in which a sliding plate 3 is placed on a foundation floor 1 of a building, etc. via a base 2, and seismic isolation is performed. A seismic isolation floor 4 is provided above the foundation floor 1 for
A sliding support 5 that slides on the sliding plate 3 is provided on the lower surface of the sliding support 5.

The above-mentioned sliding bearing type seismic isolation device is designed to return the seismic isolation floor 4 to its original position when the sliding bearing 5 of the seismic isolation floor 4 slides on the sliding plate 3 due to an earthquake or the like. It is necessary to have a restoring action, and for this purpose, a restoring member is used to pull the seismic isolation floor 4 back to its original position when the seismic isolation floor 4 slides on the sliding plate 3 via the sliding bearing 5. A restoring spring 6 is installed between the foundation floor 1 side and the seismic isolation floor 4 side. Normally, the restoring springs 6 are provided in four horizontal directions.

As shown in FIG. 5, the sliding bearing 5 usually has a ring-like shape made of metal, and the sliding surface 7 in contact with the sliding plate 3 is coated with Teflon or the like and made of a polymeric material. It forms a layer and is firmly fixed to the seismic isolation floor 4 with mounting bolts 8.

[0005]

However, in the above-mentioned conventional sliding bearing type seismic isolation device, the flatness of the sliding plate 3, the flatness of the mounting surface of the sliding bearing 5 on the seismic isolation floor 4, and the manufacturing of the sliding bearing 5 are difficult to solve. Even if the product is manufactured with high accuracy, errors are likely to occur due to deformation due to the action of a large load, and this will cause galling in the sliding bearing 5, damaging the sliding bearing 5 and the sliding plate 3, shortening its life. There have been problems such as the sliding bearing 5 not sliding smoothly due to galling.

The present invention has been made in view of the above-mentioned circumstances, and provides a sliding bearing type seismic isolation device that can prevent galling of the sliding bearing and ensure reliable sliding operation and extend the life of the device. The purpose is to provide.

[0007]

[Means for Solving the Problems] The present invention provides a sliding bearing type seismic isolation device in which a sliding plate is placed on a foundation floor, and a seismic isolation floor is placed on the sliding plate via a sliding bearing. A sliding bearing type seismic isolation device is characterized in that it is tiltably attached to the seismic isolation floor via an elastic body, and a sliding plate is arranged on the foundation floor, and a seismic isolation device is provided on the sliding plate via a sliding bearing. A sliding bearing type seismic isolation device in which a floor is arranged, wherein the sliding bearing is tiltably attached to the seismic isolation floor via a spherical seat,
This is related to.

[0008]

[Operation] According to the invention of claim 1, since the sliding bearing is tiltably attached to the seismic isolation floor via the elastic body,
The elastic body deforms and tilts so that the sliding surface of the sliding bearing always matches the top surface of the sliding plate. According to the invention of claim 2, since the sliding bearing is tiltably attached to the seismic isolation floor via the spherical seat, the spherical seat is arranged so that the sliding surface of the sliding bearing always coincides with the upper surface of the sliding plate. Rotate and tilt.

[0009]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings.

FIG. 1 shows an embodiment of the present invention.
A sliding plate 3 is arranged on a base plate 2 of a foundation floor 1, and a sliding support 5 sliding on the sliding plate 3 is tiltably attached via an elastic body 9 made of hard rubber or the like.

According to the above embodiment, since the sliding bearing 5 is attached to the seismic isolation floor 4 via the elastic body 9, the sliding surface 7 of the sliding bearing 5 is always aligned with the upper surface of the sliding plate 3. The elastic body 9 is deformed and the sliding bearing 5
This eliminates the possibility of galling.

FIG. 2 shows another example of FIG. 1, in which when rubber is used for the elastic body 9, it is thought that the rubber may become flattened due to the high surface pressure applied to the rubber, and the rubber may also slip. Since the ability to satisfactorily transmit the frictional force acting on the bearing 5 to the seismic isolation floor 4 is low, a holder 10 whose inner surface is coated with Teflon to hold the outer periphery of the sliding bearing 5 is attached to the lower surface of the seismic isolation floor 5. I am trying to attach it to.

FIG. 3 shows another embodiment of the present invention.
A sliding plate 3 is arranged on the base plate 2 of the foundation floor 1, a sliding support 5 that slides on the sliding plate 3 is attached to the lower surface of the tilting plate 11, and a spherical seat having a hemispherical shape is further installed on the lower surface of the seismic isolation floor 5. 12 is attached, and a recess 13 that fits into the spherical seat 12 is formed on the upper surface of the tilting plate 11. Also,
The contact surface between the spherical seat 12 and the recess 13 is coated with Teflon or the like to facilitate tilting.

According to the above embodiment, since the sliding bearing 5 is attached to the seismic isolation floor 4 via the ball seat 12, the sliding surface 7 of the sliding bearing 5 is always aligned with the upper surface of the sliding plate 3. The sliding bearing 5 is tilted by the spherical seat 12, so that the sliding bearing 5 is prevented from galling.

It should be noted that the present invention is not limited only to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[0016]

Effects of the Invention As explained above, according to the sliding bearing type seismic isolation device of the present invention, the sliding bearing is supported on the seismic isolation floor via the elastic body or the spherical seat. The sliding bearing can tilt freely so that the sliding surface of the sliding plate always matches the top surface of the sliding plate, thus solving the problem of sliding bearing galling and extending the life of the sliding bearing type seismic isolation device. Further, excellent effects such as being able to provide an inexpensive sliding bearing type seismic isolation device without requiring high precision can be achieved.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway front view showing another example of FIG. 1;

FIG. 3 is a partially cutaway front view showing another embodiment of the present invention.

FIG. 4 is a front view showing an example of a conventional sliding bearing type seismic isolation device.

FIG. 5 is a partially cutaway front view showing a state in which a conventional sliding bearing is attached.

[Explanation of symbols]

1 Foundation floor 3 Sliding plate 4
Seismic isolation floor 5 Sliding support 9 Elastic body 12 Spherical seat

Claims (2)

[Claims] Claim 1: A sliding bearing type seismic isolation device in which a sliding plate is arranged on a foundation floor, and a seismic isolation floor is arranged on the sliding plate via a sliding bearing, in which the sliding bearing is connected to the seismic isolation floor by an elastic body. A sliding bearing type seismic isolation device characterized in that it is installed so that it can tilt through. 2. In a sliding bearing type seismic isolation device in which a sliding plate is placed on a foundation floor and a seismic isolation floor is placed on the sliding plate via a sliding bearing, the sliding bearing is placed in a spherical seat with respect to the seismic isolation floor. A sliding bearing type seismic isolation device characterized in that it is installed so that it can tilt through.