| 摘要 |
PCT No. PCT/DE87/00448 Sec. 371 Date Dec. 19, 1988 Sec. 102(e) Date Dec. 19, 1988 PCT Filed Oct. 2, 1987 PCT Pub. No. WO88/08056 PCT Pub. Date Oct. 20, 1988.A barrier post (1) for closing a variety of access paths as well as parking lots and parking spaces in particularly easy to use and entails no risk to the user, for example by the presence of clamping points, because the swivel hinge (4) is divided into a lower and an upper hinge (6, 7). The lower hinge (6) constitutes the link between the base (13) and the displacement shaft (11) and then only after that with the tube (5) whereas the upper hinge (7) is the link between base (3) and tube (5). The displacement shaft (11) is connected, either directly through its movement nut (15) or indirectly through a guide (8), a sliding guide (9) and movement unit (15), with the tube (5) and raises or lowers the tube by appropriate rotation. This is achieved by means of a motor (13) with drive (12) accommodated in the tube (5), but which the movement nut (15) together with the whole tube (15) is pivoted upwards or downwards, depending on the direction of rotation. By fixing a spring (22) to the movement nut (15), the vertical forces are absorbed, which makes simultaneous reduction of the driving forces possible. Unintentional raising of the barrier post (1) when a vehicle (60) is parked above it is effectively prevented because the receiver (57) is blocks by the parked vehicle. The receiver (57) is reactivated, the motor switched on and the barrier past (1) pivoted upwards only when the vehicle has left its parking place.
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