Seismic isolation apparatus and structure having seismic isolation apparatus

Inactive Publication Date: 2009-04-16
SATO TAKANORI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]Therein, an object of the invention is to provide, as a simple configuration, a seismic isolation apparatus with a low friction coeffident and a high surface hardness, and to provide a seismic isolation structure in which such a seismic isolation apparatus can be used by a simple method and at a low cost.

Problems solved by technology

In the event that the friction coefficient is not zero, but exists even slightly, the body moves, and there is a possibility of a residual displacement occurring after the earthquake.
However, the friction coefficient being too low, so that the body moves easily at a time of regular use, is a problem.
However, with the heretofore described kind of previously known seismic isolation apparatus, not only is an overall height of the seismic isolation apparatus large, meaning that an effective utilization of space cannot be achieved, but also it is not possible to acquire a sufficiently low friction.
Also, with a building using the heretofore known seismic isolation apparatus, operations of inserting the air jack between the upper and lower slabs, and lifting the upper slab after the concrete hardens, being necessary as a construction method, it is troublesome, a construction schedule lengthens, and a cost soars.
Furthermore, as the slip bearing main body is inserted under the concrete upper slab, it not being possible to insert it all the way on an interior side, a disposition of the slip bearing main body is restricted to a peripheral edge portion in a range reachable by hand.

Method used

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  • Seismic isolation apparatus and structure having seismic isolation apparatus
  • Seismic isolation apparatus and structure having seismic isolation apparatus
  • Seismic isolation apparatus and structure having seismic isolation apparatus

Examples

Experimental program
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first embodiment

[0066]A seismic isolation apparatus 1 according to the invention, for example, is of a low friction combination structure formed by a point contact between an approximately planar hard plate base 3, which has a surface on which are disposed convexly curved projections 2 of a uniform height, and a smooth, flat plate-like glide plate 4, as shown in FIGS. 1 to 3. At least three of the convexly curved projections 2 being formed, in the embodiment shown in FIG. 3, for example, they are distributed aligned at a pitch t of 50 mm, but by disposing them aligned in a planar form at a pitch t in a range of 10 mm≦L≦100 mm, the hard plate base 3 acquires a more stable glide performance. In the embodiment, a height of the seismic isolation apparatus 1 is approximately 4 mm.

[0067]The seismic isolation apparatus 1, as shown in FIG. 2, has the approximately planar hard plate base 3, which has the convexly curved projections 2, as a lower platform, and disposes the smooth, flat plate-like glide plate...

second embodiment

[0075]FIG. 9 showing a seismic isolation apparatus 1 the hard plate base 3 and the glide plate 4 are made of a synthetic resin, tetrafluoroethylene, polyacetal, polyethylene, vinyl chloride, nylon, acryl, polyurethane, or the like, is used as the synthetic resin. In the case of the hard plate base 3, as the convexly curved projections 2 are also integrally molded, it is simple, and it is also possible to make the cost low.

third embodiment

[0076]FIG. 10 showing a seismic isolation apparatus 1 a hard medium 2e fills a concave portion on an underside of the convexly curved projections 2. By filling with the hard medium 2e, the convexly curved projections 2 become unlikely to collapse under a load, and a compressive strength as the seismic isolation apparatus 1 increases dramatically

[0077]FIGS. 11A and 11B showing a fourth embodiment, a flooring material 6 in which holes are formed is made a lower platform, the convexly curved projections 2 of the hard plate base 3 are caused to protrude upward through the holes from a rear side, and the kind of smooth glide plate 4 shown in FIG. 2 is placed on an upper side thereof as a movable body FIGS. 12A, 12B and 12C showing a fifth embodiment, a configuration is such that the convexly curved projections 2 are made the kind of individual single bodies shown in FIGS. 12B and 12C, each convexly curved projection 2 is disposed in a position of a respective hole of the flooring materi...

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Abstract

To provide a seismic isolation apparatus which, as well as widening an applicable shaking range, can be easily configured and is low in height, a seismic isolation apparatus is configured of a low friction combination formed by a point contact between a planar hard plate base, which has a surface on which are disposed at least three convexly curved projections of a uniform height, and a glide plate which is a smooth, hard, flat plate.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a seismic isolation apparatus, and to an item of equipment such as an automatic vending machine, or a structure like a building, which uses the seismic isolation apparatus.[0003]2. Prior Art[0004]In a seismic isolation apparatus, an ideal seismic isolation is a case in which a friction coeffident is zero. In this case, even in the event that a supporting surface shakes due to an earthquake, its body does not move at all. In the event that the friction coefficient is not zero, but exists even slightly, the body moves, and there is a possibility of a residual displacement occurring after the earthquake. However, in the event that it is possible to easily recover the residual displacement, there is no problem as an anti-earthquake measure. However, the friction coefficient being too low, so that the body moves easily at a time of regular use, is a problem. A designing is done with a frictio...

Claims

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Application Information

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IPC IPC(8): E04H9/02
CPCE04H9/021
InventorSATO, TAKANORI
OwnerSATO TAKANORI