Three dimensional guide

Details Three dimensional guide Three dimensional guide

1999-07-01

2000-12-26

Stephan, Beth A.

Static structures (e.g., buildings)

Means compensating earth-transmitted force

Relative motion means between a structure and its foundation

521671, 521674, E04B 198, E04H 902

Patent

active

061640220

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention relates to a vibration isolating three-dimensional guiding apparatus, and more particularly to a vibration isolating three-dimensional guiding apparatus for disposed between the ground and a structure for preventing vibrations of the ground from being transmitted to the structure (building) as much as possible.


BACKGROUND ART

Heretofore, some structures have employed a vibration isolating construction specially designed to minimize the effect of seismic vibrations in view of the properties of the seismic vibrations. One such vibration-isolated structure incorporates a vibration isolator disposed between the ground and the structure for preventing vibrations of the ground due to earthquakes from being transmitted to the structure (building) as much as possible.
According to such a vibration isolator, as shown in FIGS. 15A and 15B of the accompanying drawings (FIG. 15A is an elevational view and FIG. 15B is a plan view), a building 301 is not fixed to a foundation 302, but a plurality of guiding apparatuses 303 for allowing the building 301 to move on the foundation 302 are disposed between the foundation 302 and the building 301. When seismic forces higher than a certain level are applied, the building 301 slides on the guiding apparatuses 303 to prevent the seismic forces from acting on the building 301.
The applicant of the present invention has previously proposed three-dimensional guiding apparatuses for use as the above guiding apparatus in Japanese patent application No. 9-37072. The proposed three-dimensional guiding apparatuses are roughly grouped into two types. FIG. 12 of the accompanying drawings shows in perspective one of the types of the proposed three-dimensional guiding apparatus. As shown in FIG. 12, the three-dimensional guiding apparatus has a base 140, a first curved guiding apparatus 150 mounted on the base 140 and having an arcuate track, a second curved guiding apparatus 160 disposed above the first curved guiding apparatus 150 and having a plane of movement along an arcuate track which crosses the plane of movement of the first curved guiding apparatus 150, and an intermediate member 170 positioned between the first curved guiding apparatus 150 and the second curved guiding apparatus 160 and interconnecting the first curved guiding apparatus 150 and the second curved guiding apparatus 160.
The first and second curved guiding apparatuses 150, 160 comprise track rails 151, 161 vertically curved at a predetermined curvature and having ball rolling grooves 153, 163 defined along an arcuate shape of predetermined curvature in mutually confronting surfaces, bearing blocks 152, 162 having an U-shaped cross section astride the track rails 151, 161 and having ball rolling grooves defined in alignment with the ball rolling grooves in the track rails 151, 161 along an arcuate shape of predetermined curvature, and a plurality of balls (not shown) disposed for bearing loads between the ball rolling grooves in the track rails 151, 161 and the ball rolling grooves in the bearing blocks 152, 162. The intermediate member 170 which interconnects the first curved guiding apparatus 150 and the second curved guiding apparatus 160 is in the form of a rigid block.
FIG. 13 of the accompanying drawings is a view showing the manner in which the three-dimensional guiding apparatus shown in FIG. 12 is used.
As shown in FIG. 13, three-dimensional guiding apparatuses 303 have respective spherical guide tracks whose centers of curvature are established separately, rather than as a common center, on a building 301. Between the building 301 and the three-dimensional guiding apparatuses 303, there are provided tilt absorbing mechanisms 304 for allowing tilts generated between the building 301 and the three-dimensional guiding apparatuses 303 when vibrations occur. Each of the tilt absorbing mechanisms 304 may comprises a universal joint, a spherical bearing, or an elastic member of rubber or the like.
FIG. 14 of the accompanying drawings is a front elevational view showing th

REFERENCES:
patent: 2014643 (1935-09-01), Bakker
patent: 4883250 (1989-11-01), Yano et al.
patent: 5261200 (1993-11-01), Sasaki et al.
patent: 5442883 (1995-08-01), Nishimura et al.
patent: 5934029 (1999-08-01), Kawai et al.
patent: 5970666 (1999-10-01), Kurabayashi et al.

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