JPS63261027A - Earthquake damping 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 (Field of Industrial Application) The present invention mainly relates to a seismic isolation device for absorbing vibrations caused by structures such as buildings during earthquakes.

(Prior Art) As this type of conventional device, various devices using, for example, anti-vibration rubber, various springs, oleo shock absorbers, etc. have been proposed.

(Problems to be Solved by the Invention) However, the above-described conventional device has a problem in that the structure is relatively complicated and the cost is high.

In order to solve these problems, it is an object of the present invention to provide a seismic isolation device with a simple structure and low cost.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention includes rotating a sphere on one of the members at the joint between the ground side member and the seismic isolation side member of the structure. A seismic isolation device is constituted by providing the other member with a seat that can be fitted freely, exposes a part of the sphere, and has a concave spherical surface that connects with the exposed part of the sphere.

(Function) As described above, in the present invention, a joint consisting of a rotatable sphere and a seat having a concave spherical surface that connects to the sphere is installed between the ground side member and the seismic isolation side member of the structure. Because of this arrangement, even if the ground and ground side members vibrate when an earthquake occurs, most of the horizontal vibration is absorbed by the spherical body being transferred to the concave spherical seat.

The sphere that has been transferred to the concave spherical seat returns to its original position due to its centripetal action.

Therefore, according to the device of the present invention, it is possible to absorb most of the vibrations in the horizontal direction during an earthquake, so it is possible to significantly reduce the vibrations on the side of a structure such as a building that requires seismic isolation.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

In the figure, 1 (see Figures 5 and 6) is the ground, 2 is a building, 3 is a cloth foundation whose lower part is buried in the ground 1, and 4 is chestnut stone.

In the case of FIG. 5, the member 5 that is integrally connected to the cloth foundation 3 is the ground side member, and the member 6 that is integrated with the building 2 above this ground side member 5 is the seismic isolation side member.

In addition, in the case of Fig. 6, the building 2 is integrally connected to the cloth foundation 3.
The foundation beam 0 is the ground side member 5, and the floor member provided so as to float above the foundation beam 5 is the seismic isolation side member 6. Note 7
is a wall inside the building 2, and 8 is equipment that requires seismic isolation, such as a computer placed on the seismic isolation side floor member 6.

In this embodiment, as shown in Figs. 1 to 3, a concave spherical surface 9a (see Fig. 1.3) is formed at the center of the rectangular plate, and each of the four corners of the rectangular plate is formed with a concave spherical surface 9a (see Fig. 1.3). Bolt hole 9
b, 9c, and a stopper protrusion 9d protruding from one side of the rectangular plate-shaped body is placed on the ground side member 5 and fixed with four bolts 10. Furthermore, lOa
is a hexagonal hole formed in the circular head of the bolt.

Further, a circular recess 11a is provided in the center of the rectangular plate, a screw llb is formed around it, a hemispherical recess 11C is provided in the center of the circular recess 11a, and a hemispherical recess 11C is provided at each of the four corners of the rectangular plate. Bolt holes lld and lie are provided, and a stopper hook llf that engages with the stopper protrusion 9d is provided protrudingly on one side of the rectangular plate-like body to integrally form the sphere holding member 11. 11 is applied to the lower surface of the seismic isolation side member 6 and fixed with four poles 10.

Then, the sphere 12 is fitted into the hemispherical recess 11c, and the sphere retaining ring 13 is screwed onto the screw llb.
2 is rotatably held, and the exposed portion of this sphere 12 is joined to the concave spherical surface 9a of the seat 9 to constitute the seismic isolation device of the present invention.

Note that FIG. 4 shows an embodiment in which the seat 9 and the sphere holding member 11 are reversed from those in FIG. 1, and the present invention may be applied to either FIG. 1 or FIG. 4. It is also the first stopper.
The protruding piece 9d and the hook Ilf shown in FIGS. 3 to 3 may be provided as necessary.

FIG. 5 shows the ground side member 5 connected to the cloth foundation 3 of the building 2,
This is an embodiment in which the seismic isolation device A of the present invention is provided between the seismic isolation side member 6 above the seismic isolation side member 6, and FIG. 6 is supported via the seismic isolation device A of the present invention, and 14 in the figure is a sponge-like packing interposed between the side edge of the floor member 6 and the wall surface 7.

Since the seismic isolation device A of the present invention is configured as described above, when an earthquake occurs in the embodiment shown in FIG. 5, for example, the ground 1, the cloth foundation 3, and the ground side member 5 integrally connected Although both vibrate, the upper structure of the building 2 that is integrated with the seismic isolation side member 6 tries to maintain a stationary state due to its inertia. Therefore, the sphere 12 of the seismic isolation device A is the concave spherical surface 9 of the catch seat 9.
Although the sphere 12 once moves away from the center of the concave spherical surface 9a, the sphere 12 gently returns to its original position due to the centripetal action of the sphere 12 with respect to the concave spherical surface 9a.

Therefore, even when an earthquake occurs, according to the present invention, most horizontal vibrations on the base isolation side can be absorbed.

The stopper device shown in Fig. 1, which consists of a protruding piece 9d and a hook llf, has the function of preventing the seismic isolation device from being separated in the vertical direction, and also suppressing the amount of horizontal differential movement within limits. be. However, this stopper device may be provided as required.

In addition, in the embodiment shown in FIG. 6, only the floor member 6 in the building 2 has a seismic isolation structure, and this is used for the floor of a room where equipment 8 such as a computer etc. that requires a seismic isolation function is installed. It is suitable as a structure.

(Effects of the Invention) As described above, in the present invention, the joint consisting of the rotatable sphere 12 and the seat 9 having the concave spherical surface 9a that is connected to the sphere 12 is connected to the ground side member 5 of the structure for seismic isolation. Side member 6
Therefore, even if the ground and ground-side members vibrate when an earthquake occurs, most of the horizontal vibration is caused by the movement of the sphere 12 relative to the concave spherical catch 9. is absorbed.

The sphere 12 transferred to the concave spherical catch seat 9 is
Its centripetal action returns it to its original position.

Therefore, according to the device of the present invention, most of the horizontal vibrations during an earthquake can be absorbed, so that vibrations on the side requiring seismic isolation in a structure such as a building can be significantly reduced.

Further, since the device of the present invention has a very simple structure as described above, excellent effects such as ease of manufacture and reduction in cost can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the device of the present invention, Fig. 2 is a view taken along the line ■-■ in Fig. 1, and Fig. 3 is a longitudinal cross-sectional view of the device of the present invention.
Fig. 4 is a vertical sectional view showing a modification of Fig. 1, Fig. 5 is an elevation view showing an example of the use of the device of the present invention, and Fig. 6 is a view taken along the line ■-■ in the figure. FIG. 2 is an elevational view showing the interior of an example building. 1... Ground 2... Building 3... Cloth foundation 4... Chestnut stone 5... Ground side members
6... Seismic isolation side member 9... Seat 9a
... Concave spherical surface 10 ... Bolt 11 ... Sphere holding member 12 ... Sphere 13 ... Sphere holding ring A ... Seismic isolation device

Claims (1)

[Claims] 1. At the joint between the ground side member and the seismic isolation side member of the structure, a sphere is rotatably fitted into one of the members, and a part of the sphere is exposed, and the exposed part of the sphere and A seismic isolation device characterized in that the other member is provided with a seat having a concave spherical surface to be joined.