摘要 |
<p>The device has a bridge part (4) connected with a lower plate (1) by connecting parts (6, 7), where the bridge part is held away from the lower plate against relative movement normal to a plane of the lower plate. A clamping part (5) is implemented as eccentric and rotatably supported at the bridge part in such a manner that a lowest lying part of eccentric surface projects below a lower side of the bridge part, and the dimension of the projection varies with the rotation angle of the clamping part relative to the bridge part.</p> |