BASE ISOLATION DEVICE FOR CRANE

摘要

PROBLEM TO BE SOLVED: To provide a base isolation device for crane effective for a travelling crane having a gate-shaped crane body. SOLUTION: This base isolation device for crane comprises a revolving bearing ring 12 comprising the relatively rotatable upper and lower rings between a crane body 1 and a travelling device 2, a lower vertical shaft of a block 18 pivotted on a saddle 11 of the crane body 1 is supported on a revolving bearing 13 provided on a decentering position on the upper ring, and it comprises an automatic restoring mechanism for the revolution on a central line C2 of a horizontal lever 19 of which a basic end is mounted on the upper ring of the revolving bearing ring 12.