| 摘要 |
PROBLEM TO BE SOLVED: To provide a lining chuck for reducing the number of part items while extremely highly accurately chucking a work having a central hole. SOLUTION: A spring tube 11 having the inner periphery formed as a tapered surface 12, is arranged on the tip of a body 7 installed on the tip of a body holder 1. A draw bar 16 moved in the shaft direction by operation of a hydraulic cylinder, is slidingly inserted into a bar inserting hole 10 arranged on a central shaft of the body 7. A draw bar head 16b for arranging a tapered surface 20 on the outer periphery in a tip part of the draw bar 16, is slidingly inserted into the spring tube 11. This draw bar 16 is moved to the body holder 1 side. The tapered surface 20 of a tapered head 16b slides on the tapered surface 12 of the spring tube 11, to thereby sandwich an inner peripheral surface of the work W fitted to the outside by diametrally expanding the spring tube 11. Sandwiching of the work W is released by diametrally contracting the spring tube 11 by self-elasticity by an advance of the draw bar 16. COPYRIGHT: (C)2005,JPO&NCIPI
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