| 摘要 |
The clamp consists of a stirrup (18) in the form of a slider which fits round three sides of an oscillating arm (2) engaging with a clearance with an openwork frame (15) and is equipped with two sets of inner jaws (23, 24), one on each side of the frame. The frame has lateral guides (16a,17) for the two sets of jaws, which engage with two central wedges (22, 25). The clamp is adjusted by a screw (20) fitted through a threaded hole in a spacer (19) fixed between the two ends of the stirrup and applying a pressure on the second wedge (25) which, in turn, applies a traction to the first one (22). An elastic element (26) between the tip of the screw and the second wedge (25) ensures a retention of the clamp by friction. |
