LIFTING BELT WINDING STRUCTURE IN TRANSPORT CARRIAGE AND TRANSPORT CARRIAGE

摘要

PROBLEM TO BE SOLVED: To always hold a load carrying platform horizontally at any lifting position by suppressing a winding difference of two lifting belts within an allowable limit in a belt winding mechanism of double winding system. SOLUTION: A pair of front and rear belts 5 and 6 which suspend a lifting table 8 forming a carriage are wound doubly on a drum 19 through idlers 20. Also the two belts 5 and 6 are fixed at the positions opposite by 180 deg.C to each other with respect to a shaft part 19a, and one belt 5 is guided by an adjusting idler 21 to align its unwinding angleθ1 (angle relative to horizontal plane) with the unwinding angleθ2 of the other belt 6 so as to equally set both unwinding anglesθ1 andθ2. Thus timings at which the belts 5 and 6 move to the winding of the next layer become the same for each winding layer, and the cumulative winding difference for each rotation of the drum due to displacement of the timings at which the belts move to the winding of the next layer is less than a specified value at which the carriage can be held at a reguired levelness.