SMALL DIAMETER BALL FORCED CIRCULATION ROLLING PASSAGE STRUCTURE AND SMALL DIAMETER BALL CIRCULATION PASSAGE STRUCTURE FOR SUPPORTING ROLLING BALL BASE ISOLATION

摘要

PROBLEM TO BE SOLVED: To forcedly roll a small diameter rolling steel ball 2 by its own force and let it roll and enter between a bowl-like load receiving rolling passage panel 1 and a large diameter rolling steel ball 3 without letting it remain on the halfway irrespective of direction to roll for base isolation by providing the small diameter rolling steel ball 2 between them securely when earthquake vibration occurs. SOLUTION: A forced circulation covering lid 5 constituted by providing many small diameter rolling steel balls 2 in the middle to cover almost all the parts of an outer surface of the large diameter rolling steel ball 3 and providing an elastic body 8 between two layers of the bowl-like load receiving rolling passage panel 1, an outer shell plate 6, and a movable pressing type rolling plate 7 is provided. COPYRIGHT: (C)2006,JPO&NCIPI