CENTERING DEVICE FOR DISK

PROBLEM TO BE SOLVED: To enable centering of a center hole of a disk at the same time when the disk is held. SOLUTION: The tip of a straight rod 4 is fixed to a guide section 10 having the diameter smaller than those of center holes 30A, 31A of the disks 30, 31. This rod is inserted to a bush 6 so as to be advanced and retreated. The tip side and base end side of a rubber-like elastic body 1 are fixed between the neighborhood of the tip of rod 4 fixed to the guide section and the bush. A flange section 11 is formed at the base end side of this rubber-like elastic body. The rod is advanced while the bush side is positioned, and it is inserted to the center hole of the disk while the rubber-like elastic body 1 is extended to thin the diameter, and the disk is held in such a manner that the rod is retreated after the insertion and the diameter of the rubber-like elastic body is restored and the rubber-like elastic body is pressed in contact with the inside of the center hole. COPYRIGHT: (C)2006,JPO&NCIPI