| 摘要 |
<p>The invention relates to an anti-extraction safety device comprising, for each roller (13, 14), a rotatably fixed, preferably enveloping, shroud part (32, 33) forming a single-component functional mechanical set with its counterpart. Said shroud parts are inclined and the base thereof has an extension (46, 47) which extends beneath the projecting flanks (21, 22) of the head of the guiding rail (19) in order to prevent any extraction of the guidance set. At the front, the base of the shroud parts is preferably moulded into a spout for collecting and disposing of objects which may be present on the guiding track. The invention can be used for the rail guidance of road vehicles used for public transport.</p> |
