| 摘要 |
<p>A grip device has an element that can be moved in relation to fixed element between an open position and a closed position in which the two elements are adapted in such a way as to grip a wall, a displacement device which enables the displacement of the mobile element and the adjustment of the distance separating the two elements in a closed position to the thickness of the gripped wall, and a blocking device, which are adapted in such a way as to immobilize the mobile element in the adjusted closed position. The blocking device can be moved between a release position and a blocking position in which they immobilize the mobile element by friction in the adjusted closed position.</p> |
