| 摘要 |
PURPOSE:To surely grasp parts having different length and breadth measurements by operating two sets of levers having a different lever ratio by air of negative pressure in order to provide grasp operation with different speeds to float a taper cam used for the earlier grasp by a spring. CONSTITUTION:When negative pressure is generated by an suction device, a piston 5 inside a chuck body 4 is sucked up so that the taper cams 10 and 11 rise. Then, the roles 13a and 13b, 16a and 16b are spread out to operate the levers 14, 17 and the claws 19, 20 for grasping an article operate in the direction to grasp the article 2. However, the lever 17 has a larger lever ratio than the lever 14 so as to quickly operate so that the claw 20 earlier grasps the article 2. At this time, the taper cam 11 stops to rise, however a spring 12 bends and the taper cam 10 continues to rise to further spread out the roles 13a and 13b to close the claw 19 for grasping the article 2. Thereby, also an article having different length and breadth measurements can be surely grasped by four claws. |
