JPH0435629Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seismic isolation device used for machine foundations and structure foundations such as buildings.

[Prior art and its problems]

As shown in FIG. 7, one such seismic isolation device uses a laminated rubber body 1 in which rubber and steel plates are alternately stacked. In the figure, 2 indicates a building, and this laminated rubber body 1 is arranged, for example, between a building 2 as one displacement body and a foundation 3 as the other displacement body, and the foundation 3 is connected to the building through the laminated rubber body 1. Support 2.

However, this laminated rubber body 1 has enough elasticity to support the weight of the building, etc. and absorb horizontal vibrations, and can withstand large horizontal displacements of the building, etc. with respect to the ground due to horizontal vibrations. However, the damping force is weak and large horizontal displacements occur, causing various inconveniences to buildings etc. due to large lateral swaying, so how to minimize horizontal displacements remained an issue.

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
The object of the present invention is to provide a seismic isolation device with a simple structure that can damp horizontal vibrations in combination with the laminated rubber body.

[Means for solving problems]

In order to achieve the above object, the present invention arranges a laminated rubber body between the displacement bodies, supports one displacement body by the other displacement body, and has different poles facing each other between the displacement bodies. The main idea is to arrange the magnets vertically and to restrain the magnets from moving laterally relative to the displacement body, and to attach at least one magnet so that it can move vertically relative to the displacement body. It is something to do.

[Effect]

According to the present invention, in response to horizontal vibration, the two magnets of the device of the present invention slide and try to separate in the horizontal direction, but the mutual attractive force between the magnets acts effectively.
Frictional damping helps absorb and alleviate horizontal vibrations.

Note that with respect to displacement in the vertical direction, the action of the laminated rubber body is not affected because at least one of the displacement bodies does not restrain the magnet in the vertical direction.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 1 is a vertical sectional front view showing the first embodiment of the seismic isolation device of the present invention, and Fig. 2 is a front view showing the same in use.In the figure, 2 is a building as one displacement body, 3 is the other As shown in FIG. 2, a laminated rubber body 1 is separately provided between these, and the foundation 3 supports the building 2 via the laminated rubber body 1.

Between the foundation 3 and the building 2, two magnets 4 and 5 are arranged and joined in the vertical direction with different poles facing each other. Among these, the magnet 5 is also placed horizontally on the foundation 3.
The other magnet 4 is restrained from moving in the vertical direction and fixedly attached, but the other magnet 4 is restrained from moving laterally with respect to the building 2 via the cylindrical mounting hardware 6, but it is restrained from moving in the vertical direction. Movably mounted.

In this case, in response to vertical relative displacement of the foundation 3 in a building, the magnet 4 moves up and down within the mounting hardware 6, but the positional relationship with the magnet 5 does not change.

On the other hand, in response to horizontal vibrations caused by an earthquake, the laminated rubber body 1 deforms in the horizontal direction due to its elasticity, and the magnets 4 and 5 also swing and try to move away from each other.

At this time, the attraction force between the magnets 4 and 5 is exerted, and the horizontal vibration is absorbed and alleviated by the friction damping at this time, and the horizontal displacement is kept small.

By the way, the magnet 4 may be fixed to the building 2, and the magnets 5 may be attached to three foundations so as to be vertically movable. Also,
As another embodiment, the number of magnets is increased as shown in FIG.
At least one of 9 may be attached to the connecting hardware 11 so as to be vertically movable.

The magnets 7 to 10 are joined with mutually different poles, and in a normal state, magnet 8 is fixed to magnet 7 and magnet 9 is fixed to magnet 10 by magnetic force.

The method of use and operation is the same as that of the embodiment shown in FIG. 1, and a detailed explanation will be omitted. However, in response to vertical vibration, the magnet 8 moves up and down within the connecting hardware 11, and the positional relationship between the magnets does not change.

On the other hand, with respect to horizontal vibration, the positional relationship between the magnets 7 and 8 and the magnets 9 and 10 tends to change, and the attraction force between them acts to dampen the vibration.

4 and 5 are examples of applications of the first embodiment shown in FIG. 1, in which a vibration-proof rubber 12 or a spring 13 is provided in the space above the magnet 4 within the mounting hardware 6. In this way, the elasticity of the vibration isolating rubber 12 and the spring 13 increases the pressing force between the magnets, further increasing the damping effect when the magnets slide against each other.

Furthermore, as another embodiment, as shown in FIG. 6, the device shown in FIG. 1 may be housed in a through cavity 14 provided in the laminated rubber body 1.
In this way, it can be configured as a device integrated with the laminated rubber body 1. In the figure, reference numeral 15 indicates pressure receiving plates on the upper and lower sides of the laminated rubber body 1.

[Effect of idea]

As mentioned above, the seismic isolation device of the present invention can be used in combination with a laminated rubber body directly or indirectly and incorporated into a building foundation, machine foundation, etc., and can extremely effectively cope with horizontal vibrations such as earthquakes. It is.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing the first embodiment of the seismic isolation device of the present invention, Fig. 2 is a front view showing the same in use, and Figs. 3 to 6 are the second to fifth embodiments. FIG. 7 is a front view showing a conventional example. 1... Laminated rubber body, 2... Building, 3... Foundation,
4, 5...Magnet, 6...Mounting hardware, 7-10...
Magnet, 11... Connecting hardware, 12... Anti-vibration rubber, 1
3... Spring, 14... Penetration cavity, 15... Pressure receiving plate.

Claims (1)

[Scope of utility model registration request] A laminated rubber body is arranged between the displacement bodies, one displacement body is supported by the other displacement body, and magnets are arranged vertically between the displacement bodies with different poles facing each other. A seismic isolation device characterized in that the magnets are restrained so as not to move laterally relative to the displacement body, and at least one of the magnets is attached so as to be movable in the vertical direction with respect to the displacement body.