Method for storing upper spreader of crane and upper spreader storage device of crane

摘要

Problem to be solved: to provide an upper spreader storage method of a crane capable of improving workability during storage of an upper spreader and an upper spreader storage device of a crane.The upper spreader 40 is suspended by bringing the abutting member 2 down to the lower side of the upper spreader 40.The upper spreader 40 in the suspended state is disposed above the lower spreader, and the boom undulating rope is wound up to a predetermined length while applying tension to the boom undulating rope.After the boom undulating rope is wound up to a predetermined length, the abutting member 2 is brought into contact with the gantry main cylinder in the folded state.When the abutting member 2 is brought into contact with the gantry main cylinder, the posture of the upper spreader 40 is changed along the shape of the roller 11, so that the upper spreader 40 is stored in the storage position of the gantry main cylinder.Diagram