| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a lever for securing a clamp table from returning automatically once after the lever is rotated into a direction to tighten, and to make the lever for securing the clamp table return into a direction to cancel the tightened state automatically when a state of holding strings tight with a pair of bodies for holding tight is cancelled. <P>SOLUTION: A lock pin 9 is provided to appear and disappear near a supporting post 3 on the upper surface of a main body part 8 of the clamp table, and the upper end is made to protrude all the time through a pressure expansion coil spring. When a cylindrical body 3b of the supporting post 3 falls, the lock pin 9 hit with the lower end part of the cylindrical body 3b is pressed in. A semi-circular cut 26 where approximately the half of the upper end part of the lock pin 9 fits is provided on the underside of a disc-shaped base part 25a of the lever 25 for securing the clamp table. <P>COPYRIGHT: (C)2004,JPO |
