PURPOSE:To enable changeover of direction in a transport carriage loaded with a heavy object such as concrete caisson moved onto a launching platform by supporting a loading base supporting a jack for lifting the heavy object on a movable frame, and lifting the frame with a jack so as to turn it in the horizontal direction. CONSTITUTION:In a groove like passage 4a of a manufacturing base 4, a hydraulic jack 19 in the contracted condition is entered through a transverse feed track 3 and positioned under a caisson A. Hereat, the hydraulic jack 19 is extended, a dolly block 22 is pressed on the bottom face of the caisson A, and the caisson is lifted up. Nextly, a carriage 10 is run, moved to the crossing position with a longitudinal feed track 2, and once loaded on a temporary receiving base B. Nextly, a jack for lifting a frame is extended to lift the whole carriage and turned by 90 deg. with a cylinder for turning not shown in the figure. Nextly, the jack 30 is contracted to bring down the carriage, and the caisson A on the temporary receiving base B is loaded again and longitudinally fed.
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