PURPOSE: Rotating shaft passing through the gravity center of frame is extended and supported by fixed supporter. The rotating shaft is connected to a driving shaft through clutch, to thereby assure the easy and safe operation of frame convertion.
CONSTITUTION: The rotating shaft 2, 3 passing through the gravity center of the roller frame 1 is mounted with the bearings 4 at both sides of the roller frame in lenthwise direction. The frame 1 is hanged by the ropes 10 and supported by the bed 9 at the bearing positions 4. The rotaing shaft 2 is extened to be provided with claw clutch 5. The worm reduction gear 7 having the mating clutch at its output end is mounted on the bed 9. With the clutch 5, 6 engaged, the handle 8 is rotated to turn the frame 1 180°. Then, the clutch 5, 6 is disconnected and the ropes 10 are lifted by crane, completing the convertion operation of the roller frame 1.
HATSUTORI TAKESHI
ABO AKIRA
HITACHI LTD