| 摘要 |
The invention concerns a pneumatic needle gripper that comprises two due slides (33) on board a gripper body (10) each carrying at least one pair of needle grippers (36). The needles on a slide are facing towards the needles on the other slide, each sloping and converging towards a frontal plane (16) of the gripper body. The slides can me moved simultaneously in opposite directions, by means of a pneumatic control piston (19), between an inactive position, in which the needles are retracted compared with the frontal plane and at a distance from each other, and an active position in which they protrude from the frontal plane to penetrate into a material to be picked up and moved. The control piston (19) is associated with an adjustment means (24) interacting with the gripper body (10) so as to vary the stroke of said piston in the direction of the slide movements, and consequently the needle grippers, towards the active position, it being able in this way to adjust the protrusion of said gripper needles from the frontal plane (16) depending on the width of the element to be picked up and moved. |
