| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To eliminate the danger of a vehicle falling down with a simple structure even if the vehicle receives an external force in the lateral direction, in a track transportation system comprising an automatic steering mechanism and a fail-safe mechanism. <P>SOLUTION: This track transportation system includes the steering mechanism 09, which automatically steers running wheels 4 of the vehicle 1 by an actuator 06, and the fail-safe mechanism 02 consisting of protective wheels 22, 23, which are provided below a protective track 3 constructed on a road surface of a track and the vehicle 1 and which move in a non-contacting manner along the protective track. The track transportation system is configured to have flanges 34, which extend to the protective wheel side on the upper part of the surfaces 32 that guide the protective wheels 22, 23 of the protective track 3, and a rigid auxiliary wheel 33 of a disk shape, whose outside diameter is smaller that of the protective wheels and which is provided above the protective wheels rotatably with the protective wheels. When the protective wheels contact the guide surfaces 32 at the time of a failure of the automatic steering mechanism 09 or by the external force, the protective wheels are locked to the bottom surfaces of the flanges 34. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
