| 摘要 |
<p>It is made up of: two continuity metallic plates (2,14) for the transit plane, provided on the structural edges of the opening, connected to the same in such a way that, interacting with the lower structural elements (A,B), realizes two recesses; a support structure (6) in correspondence of the structural opening, supporting a deformable transit plane (11); the supporting structure (6) of the deformable plane (11) being hinged on one structural edge (B) and, in correspondence of the other edge, upon which it is rested, slides under the transit plate (2) contemporaneously sustaining the same; a deformable plane (11) suitably coupled to the underlying structure (6), upon which it can slide being housed during its sliding into the recess opposite to the preceding position. The main feature of the invention is the double opposed bayonet working of the device with a disappearing sliding plane. <IMAGE></p> |
