| 摘要 |
<p>An anti-derailment device for lift or elevator door leaves (2), of the type provided with at least one guide shoe (4) at the lower or upper end thereof, suitable for sliding in a groove (5) formed in a lower sill (6) of the door or defined in an upper recess of the door, is characterised in that it comprises an element (9), associated with the shoe (4), which is shaped like a hook and constructed from a bi-material. The element (9) has two opposing faces of different materials forming a thermal couple, the materials constituting each of the two faces having different thermal expansion coefficients so that the element (9) will hook to at least one corresponding bent edge (11) of the groove (5) in response to a heating stress of the leaf (2).</p> |
