Patent ID: 6105950
Filing Date: 2000-08-22
Classification: B23Q

Abstract:
A retainer for holding a predetermined member having a cylindrical inner peripheral surface by fitting the cylindrical inner peripheral surface, the retainer comprising:a pillar-like member having a base end portion to stand on a base;a narrow portion formed at a center part of the pillar-like member;a first holding portion which is formed at a tip end of the pillar-like member, which is thicker than the narrow portion, and is arranged to fit a cylindrical inner peripheral surface of a predetermined member;a first tapered portion that tapers from the first holding portion to the narrow portion of the pillar-like member; anda tip tapered portion that tapers from the first holding portion to a tip of the pillar-like member, the first tapered portion and the tip tapered portion meeting at the first holding portion, the first holding portion thereby having a largest diameter peripheral edge of the tip end.