| 摘要 |
<p>The device is characterized in that it comprises a plate of the size of the closure (1) sandwiched between the panels of said closure and cut along a diagonal (4) in order to form two opposite, identical, substantially contiguous triangles (5, 6), susceptible of being spaced from each other under the action of a handling means (11) in the direction of the other diagonal of the closure (1) so that the triangles may be engaged by their sides (5a, 5b) respectively (6a, 6b) in the grooves (7a-10a) cut out in the upper cross beam (7) and the uprights (9, 10) of the frame and the sill (8), the translation motion of the triangles being guided by appropriate means; characterized in that, conversely, the two triangles (5, 6) are susceptible of coming close to each other under the action of a handling means (11) to unlock the closure (1). This device may be particularly but not exclusively applied to closures such as doors with one or two leaves, safety vaults, safes for example.</p> |
