To smooth transfer riding in a cut point of drive shafts, by dividing into sections the drive shaft along a conveying route, arranging a separation rail in the upward of a joint of the divided drive shaft, and journalling a separation wheel to a trolley in the upward separated from a running wheel.

A trolley 2 before and behind a conveyed object hold part 3 is moved in a direction of arrow mark by receiving rotation of a drive shaft 1a to a running wheel pair. A separation rail 10 is arranged in the upward of a divided part (joint) of the drive shaft 1a, but when the trolley 2 during moving reaches the joint, a separation wheel 6 arranged in the upward of a running wheel of the front trolley 2 runs on the separation rail 10, and the front trolley 2 finishes climbing a front half ascent in the upstream of the separation rail 10 by drive force received from the drive shaft 1a to the rear trolley 2. Thereafter, the separation wheel 6 of the front trolley 2 rolls on a descent of the separation rail 10, and the trolley comes to smoothly pass through the joint.