Patent ID: 6062779
Filing Date: 2000-05-16
Classification: B23B,Y10S,Y10T

Abstract:
A tool attaching/detaching device comprising: a holder main body for holding a tool in a fore portion thereof and fitting to a fitting hole in a rear portion thereof, with a flange portion formed in an intermediate portion thereof; a first operation ring slidably provided on an outer circumference in front of the flange portion; a second operation ring provided on an outer circumference of the first operation ring via a spacer and having an engaging claw to be engaged with an engaging portion of a machine spindle; and urging means for urging the first operation ring rearward, the tool attaching/detaching device being characterized in that: the flange portion has upper-and-lower cutouts and right-and-left cutouts formed therein; a first taper portion inwardly slanted, as viewed toward the rear, is provided in a rear portion of the first operation ring; a key portion to be fitted to a key way of the machine spindle by passing through the right-and-left cutouts is provided in a rear portion of the first taper portion; a front face generally perpendicular to an axial direction is provided in a fore portion of the spacer while protrusions to be fitted to the upper-and-lower cutouts are provided in a rear portion of the spacer; a second taper portion inwardly slanted, as viewed toward the front, is provided in a fore portion of an inner surface of the second operation ring; and a multiplicity of rolling members are arranged between the first taper portion of the first operation ring, the front face of the spacer and the second taper portion of the second operation ring.