| 摘要 |
<p>Device for the provisional retention of a screw assembly in a guide rail This device comprises a flat washer (1), of flexible material, having several protuberances (11) on its inside which end in several inclining end portions (12) and which act, with their ends, against the threading of the threaded rod (22) of the screw assembly to be immobilized in the guide rail (3). The device also comprises a tubular sleeve (4) which can be assembled on the threaded rod (22), between the head (21) of the screw and the flat washer (1). In the assembling position the flat washer (1) acts against the outer surface of the wings (31, 31') of the guide rail (3) causing the head (21) to push against the inner surface of the wings and the retention of the screw assembly in the mentioned guide rail (3). <IMAGE></p> |
