| 摘要 |
PROBLEM TO BE SOLVED: To provide an in-pipe travel technology capable of smooth travel even in a piping region having a small diameter part and a large diameter part.SOLUTION: A guide truck 2 connected to a drive truck 6 as a top car of a plurality of drive trucks 6 includes a base body part 3, a lever unit 4 consisting of a plurality of lever modules 40 arranged to the base body part 3, a lever bracket 30 to which the lever module 40 is attached so that the lever module 40 oscillates and displaces around an oscillation axial center, between a standing posture and an inclined posture, a guide wheel 5B attached to a tip end part of the lever module 40, and energizing means for energizing the lever module 40 to a standing posture. A length of the lever module 40 and a diameter of the guide wheel 5B are set so that the guide wheel 5B is positioned between an inner peripheral surface of a small diameter part and an inner peripheral surface of a large diameter part, in the standing posture of the lever module 40. |
