GRASPING CLAMPING END FOR A SCREWING DEVICE

摘要

The inventive end comprises a bushing (10) and a core (15) which extends coaxially to the cavity of the bushing (10) defining therewith a front volume (16) in which a screw head (1) is introducible and an annular volume in which axially movable jaws (M1) are arranged. Said jaws (M1) are pivotally mounted and axially held on an tubular sleeve (19) which is axially movable on the core (15) in order to pass from the end of a forward stroke position, wherein the jaws (M1) are expanded by the action of elastic means (24), to the end of a reverse stroke position, wherein the jaws (M1) are closed by the interaction of the jaws (M1) structure with the structure of the bushing (10).