| 摘要 |
PROBLEM TO BE SOLVED: To provide a base-isolating device in which a rolling means is suitably guided along a guiding direction of a guiding member, and a smooth relative movement of the rolling means with the guiding member is not obstructed even corresponding to a rapid seismic action in the different direction from the guiding direction. SOLUTION: The device is provided with guide rails 68, 69 equipped with guide supporting edges 70, 71 formed to gradually enlarge an interval between mutual outside edges arranged mutually spaced from the center to both the outer edges, and tapered rolling parts 129, 131 rolling in contact therewith from the outside for the guide supporting edges 70, 71, and consisting of circular cross-sections taperingly formed inward. The restoring function is imparted with the displacement in the height direction occurred when the tapered rolling parts 129, 131 move from the center into the outer end side along the guide supporting edges 70, 71. The guide supporting edge formed to gradually lessen the interval between the mutual inside edges of the guide rail from the center into both the outer edges can be also used. COPYRIGHT: (C)2005,JPO&NCIPI
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