| 摘要 |
<p>Gripping and lifting clamp for pipes and cylindrical objects, constituted of an annular body (1) equipped with suspension means (8) for lifting, carrying inside a plurality of jaws (7) slidable on guides (6) integral with the annular body (1) and inclined converging towards the centre downwards, the jaws (7) being connected by connecting rods (9) to an axially movable common ring (10), carried by controllable actuating members (11) adapted for bringing the ring (10) from a raised position to a lowered position, thereby determining, via the connecting rods (9), sliding of the jaws (7) in the axial direction of the annular body (1) on the inclined guides (6), between a raised, widened positioned and a lowered, closed position, in which the jaws (7) come into contact with and grip onto the external surface of the pipe (18) or cylindrical object to be lifted, the angle of inclination of the guides (6) being such as to determine, due to the friction existing between jaws (7) and pipe (18), the checking and support of the pipe (18) itself by sticking friction.</p> |
