Gantry crane with twin-drum lifting mechanism, rope drums of which wind or unwind ropes in double-sided manner

摘要

The gantry crane has a traveling crab, lifting mechanisms (5) with two drums and four ropes (7), and a fixing spreader (9) with deflection rollers (10). The rope drums adjacent to one another wind or unwind the ropes in a double-sided manner. Each rope drum winds in only one direction, and the two drums run in opposite directions.