| 摘要 |
<p>By means of a limitation with a post (10), which can be tilted about an axis (18) which runs horizontally and approximately transversely to the direction of travel, with a post (10) which is stabilised in its vertical position via a stabilising surface (12) by way of a spring (17, 17'), it is proposed, for achieving an accurate rest position, to provide at least one holding surface (16) which can be moved by the spring or springs (17, 17') towards the post (10) and is spring-loaded, the holding surfaces (16) and the stabilising surfaces (12) bearing against one another under spring pressure in the stabilised vertical position and the post (10) thus being held in its vertical position by the mutual arrangement of the holding surface (16) and the stabilising surface (12), as a result of which a banging back of the post (10) after tilting over by a relatively large tilting angle is prevented. …<IMAGE>… </p> |
