JPS6055177A - Earthquake-proof apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a seismic isolation device for suppressing vibrations of buildings, equipment, etc. due to earthquakes and the like.

[Technical background of the invention and its problems] For example, when a building has a seismic isolation structure, as shown in FIG. I'm letting you do it. This makes the whole structure flexible,
Although vibrations in both the horizontal and vertical directions of the building 1 are suppressed, since the structure is flexible in the vertical direction due to the spring material 2, the vibrations of the building 1 are suppressed.
Zero rotation movement (rocking phenomenon) is likely to occur.

[Object of the Invention] The present invention was made based on the above-mentioned circumstances, and an object of the present invention is to obtain a seismic isolation device that is free from the possibility of causing a rocking phenomenon in a building.

[Summary of the Invention J The seismic isolation device of the present invention has shafts protruding from opposite side walls of a building supported on a foundation via spring members,
One axis is the axis of the piston of a hydraulic cylinder that has an oil chamber above the piston, and the other axis is the axis of a hydraulic cylinder that has an oil chamber below the piston. The hydraulic cylinders are connected via a joint, and the bottom surfaces of the oil chambers of the respective hydraulic cylinders are communicated with each other.

Embodiment of the Invention FIG. 2, in which the same parts as in FIG. 1 are given the same reference numerals, shows an embodiment of the invention. In this figure, two opposing side walls of a building 1 have shafts 4 and 5 protruding from opposite positions, respectively. The shaft 9 is connected to the shaft 9 of the piston 7 of a hydraulic cylinder 8 having an oil chamber above the piston 7.
is the shaft 13 of the piston 11 of the hydraulic cylinder 12 which has an oil chamber below the piston 11 via a joint 10 similar to the joint 6.
is connected to. Further, the oil-filled bottom surfaces of the hydraulic cylinders 8 and 12 are communicated by a pipe 14 filled with oil.

The details of the joint 6 will be explained. Plate materials 15 and 16 with a rectangular cross section are fixed to the end faces of the shafts 4 and 9 with the long side of the cross section in the vertical direction, and at the tip of each root plate there is a link with a rectangular cross section connected at one end with a hinge 17. The other ends of 18 and 19 are connected by hinges 20 and 21, respectively.

The device of the present invention having the above configuration is also provided on two other opposing side walls of the building 1, that is, side walls parallel to the plane of the drawing.

Since a force acting on the building 1 due to the earthquake causes the building to rotate clockwise in the vertical plane, that force is directly transmitted to the shafts 9, 13 and thus to the screws 7, 11. Then,
Piston 7.11 tries to force out the oil in hydraulic cylinder 8.12. However, since both hydraulic cylinders are communicated with each other through the pipe 14, both forces are approximately zero, and the movement of both pistons and therefore of the building 1 is suppressed to a minimum. Also, when a vertical force is applied to the building 1, one of the hydraulic cylinders 8 and 12 discharges oil while the other uses it to suck it in, so there is only resistance from the pipe 14 against the flow of oil, and the main Since the inhibition of the vibration isolation effect by the spring material 3 due to the addition of the inventive device can be ignored, the same vertical seismic isolation effect as in the past due to the spring material 3 can be maintained.

Also, when a horizontal force acts on the building 1, the links 18 and 19 can move freely in the horizontal plane, so
The vibration isolation effect of the spring material 3 is not impaired, and the same horizontal seismic isolation effect as in the past can be maintained.

Note that the present invention is not limited to Example 21 above.

For example, the joints 6 and 10 may have any configuration as long as they are flexible in the horizontal direction and rigid in the vertical direction. Also,
It can also be applied to seismic isolation of building floors and various equipment.

[Effects of the Invention] As is clear from the above, the seismic isolation device of the present invention can completely perform seismic isolation in the vertical and horizontal directions, and can prevent the rocking phenomenon of buildings, so it can be used in various buildings,
It is extremely useful for seismic isolation of floors, equipment, etc.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view of an example of a conventional seismic isolation device;
The figure is a partially cutaway front view of an embodiment of the present invention, FIG. 3A is a front view of the main part thereof, and FIG. 3B is a plan view of the main part. 1...1! Ya 3... Spring material 4.5.9.13.
...Shaft 6.10...Joint 7.11...Piston 8
．． 12...Hydraulic cylinder 14...Pipe agent
Person Patent Attorney Kikuchi Department of AI

Claims (1)

[Claims] Shafts are made to protrude facing opposite side walls of the building supported on the foundation via spring materials, one shaft being the shaft of the piston of a hydraulic cylinder having an oil chamber above the piston, and the other shaft being the piston shaft of the hydraulic cylinder having an oil chamber above the piston. A seismic isolation device that is connected to the shaft of a hydraulic cylinder having an oil chamber below through a horizontally flexible and vertically side pressure joint, thereby communicating the bottom surface of the oil chamber of each hydraulic cylinder.