| 摘要 |
The clamp consists of two lateral supporting plates (10,12) connected by a cross-member (14). A lower rod (20) can slide transversely in a groove (16) in the cross-member, and is equipped with guides (21) movable in elongated apertures (18). One end of the rod is equipped with an extension (24) which passes through the lateral supporting plate (12) and a bearing (25) fixed to the plate. The end of the extension is in the shape of a fork (28) which holds a roller (26) following the surface of a cam (30). The clamp also has a bar (40) and an arm (41) which engages with a drive shaft and transmits a rotation to the bar. |
