Traveling crane and assembling/disassembling method thereof

摘要

A traveling crane according to the present invention includes a hook hoisting guide sheave (19) for guiding a hook hoisting rope (17) from the top of a boom (3) toward the end of a jib (5), and the hook hoisting guide sheave (19) is arranged on the top of the boom in a state that the guide sheave (19) can guide the hook hoisting rope (17) along the upper surface of the boom (3) by folding the rope toward an upper spreader (9) placed at a position adjacent to a boom anchor during assembling/disassembling of the crane. Thereby, the upper spreader can be moved between the boom anchor and a far end of the boom without providing a guide sheave dedicated for moving the upper spreader. Pairs of support legs are downward provided on both sides and in front and in rear of the upper spreader (9) and a roller is provided for each support leg, so that interference between the upper spreader (9) during movement and obstacles on the boom upper surface can be prevented even in a horizontal movement. <IMAGE>