| 摘要 |
PURPOSE:To simplify the rotational starting and stopping of a chuck by forming the rotating part of the chuck giving rotary motion to a work piece of only rolling bodies, and moreover to improve the operational performance of the chuck by gripping a cylindrical work piece with its both ends protruding out of the chuck. CONSTITUTION:The rotary arms 34 of a toggle mechanism means 30 are mutually approached by supplying hydraulic fluid to a cylinder means 32 to cause grip rolling bodies 40a, 40b provided opposite to each other on the rotary arms to grip a work piece between them. A rotary driving means 18 is driven afterwards to transmit its rotary motion to the grip rolling bodies 40a, 40b through a driving pulley 21, the first idler 52a, the second idler 52b and a driven pulley 50. The work piece gripped between the grip rolling bodies is therefore given the rotary motion through the grip rolling bodies being opposite to each other with the work piece put between them. On the other hand, in releasing the work piece, the rotary driving means is stopped in its function to stop the rotation of the grip rolling bodies, and then the cylinder means 32 is made to function reversely to mutually separate the rotating arms.
|
