| 摘要 |
<p>A gripper feeder for metal strip comprises on a base (2): at least one pair of grippers (26, 26', 126, 126') for the engagement of the metal strip (42, 142) to be advanced; members (24, 124, 12, 112) for moving said grippers (26, 26', 126, 126') in a direction parallel to the axis of said strip (42, 142) and in the opposite direction; and means (34, 34', 134, 134') for independently operating said grippers (26, 26', 126, 126'). The gripper which moves in the direction of advancement of the strip is activated, whereas that which moves in the opposite direction is deactivated. The members for moving said grippers consist of threaded rods (12, 112) and a single electric motor (24, 124) for driving said threaded rods (12, 112) powered alternately in the two directions of rotation. The rods (12, 112) have two portions threaded in opposite directions, a threaded bush (10, 110) provided on one gripper of each pair to engage said first portion and a threaded bush (10', 110') provided on another gripper to engage said second portion.</p> |
