Patent ID: 7802813
Filing Date: 2010-09-28
Classification: B21D,B60R,Y10T

Abstract:
1. A tubular part for fixing and holding a fixing object part inserted therein, the fixing object part being fixed by inwardly crimping a circumferential wall on a side of one end opening of the tubular part, comprising: an annular step formed at an inner peripheral surface of the circumferential wall of the tubular part; a chamfered corner provided, prior to crimping, on the inner peripheral surface of the circumferential wall at the one end opening; a tapered portion formed, prior to crimping, on an outer peripheral surface of the circumferential wall at the one end opening; an inner annular surface provided in the fixing object part attached to the annular step; an outer annular surface provided in the fixing object opposite to the inner annular surface and opposing the one end opening; a degree of chamfering being such that chamfering is performed between a point at a thickness T (T−T (T−T a length L a length from the end surface of the one end opening to the outer annular surface prior to crimping being larger than L