To provide a drill chuck, which can easily perform fastening and unfastening operation of a drill without any tool, has high claw posture stability, and has a simple structure, and to provide a drill polishing machine for polishing the front end part of the drill held in a sandwiched state by the drill chuck.
Inclined grooves having such a shape that a depth increases in an upward direction of the wall are provided in distribution directions in a lower inner wall in a drill chuck. Approximately right-angled triangular plate claws are guided by the inclined grooves. The opening/shutting level and direction involving advance or retreat of each of the claws are performed in a predetermined range by a long hole formed in the halfway of the face of each of the claws and a guide pin introduced into the long hole. In the drill polishing machine, in such a state that the drill is held in a sandwiched state by the drill chuck described in claim 1, two flanks located at the front end are successively and evenly polished to regenerate a cutting edge to a sharp state.
JPH05261608 | FINGER CHUCK |
WO/2007/028287 | A SELF-LOCKING DRILL CHUCK |
FUJIWARA SATORU
JPH0852606A | 1996-02-27 | |||
JPS5318691U | 1978-02-17 | |||
JPS505433B1 | 1975-03-04 | |||
JP64219Z | ||||
JPH04226816A | 1992-08-17 | |||
JPH0852606A | 1996-02-27 | |||
JPS5318691U | 1978-02-17 | |||
JPS505433B1 | 1975-03-04 |