| 摘要 |
The device is characterized by units of pairs of two friction or sliding shoes ( 28 ) and ( 29 ), running on a metal guide rail ( 2 ), each fixed to a self-guidance unit ( 16 ), by way of rollers ( 26 ) and ( 27 ), running along the guide rail. The shoes ( 28 ) and ( 29 ) from an electrical circuit with the guide rail ( 2 ), comprising a detector with a safety loop supplied by a low voltage (BT+ and BT-) generator loop through which a current flows when the electrical grounding contacts via the shoes ( 28 ) and ( 29 ) and the guide rail ( 2 ) are correct. According to the quality of the electrical contact at the shoes ( 27 ) and ( 28 ), the security loop will be open or closed, representing a potential risk or no risk. The invention is of utility to producers of public transport vehicles which run on tires and are self-guiding.
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