TRACKED TRAFFIC SYSTEM

摘要

A tracked traffic system having an automatic steering mechanism and a fail-safe mechanism, in which a vehicle is prevented by a simple structure from overturning even if it is subjected to lateral external force. The tracked traffic system has the steering mechanism for automatically steering wheels (4) of the vehicle (1) by an actuator and also has the fail-safe mechanism constructed from a protective track (3) placed on a track road surface and from protective wheels (22, 23) provided under the vehicle (1) and moving without contact along the protective tracks Flanges (34) projecting to the protective wheel side are provided on that upperportions of the protective track (3) that guide the protective wheel. A rigid disc-shaped auxiliary wheel (33), whose outer diameter is less than that of the protective wheels, is provided over the protective wheels so as to be rotatable with the protective wheels. When the protective wheels are in contact with the guide surfaces (32) due to an abnormality of the automatic steering mechanism or external force, the protective wheels are engaged with the lower surfaces of the flanges (34).