| 摘要 |
<p>The device has a jaw (2) maintained and opened by a spring (3) and supported on walls of a tube (1) and an axis (9). The jaws are pushed by the spring and retained by a ring (5) that is held by a screw (6). Segments (7) have same measurement as that of another screw to work, where the segments are fixed at the jaws. The jaws are tightened and enclose the latter screw that is blocked in all directions when the jaws are entered in the tube. A sleeve (8) receives a transmission shaft of a screw gun.</p> |
