ROCKING PREVENTING DEVICE OF HANGING HOOK IN FLOATING CRANE

PROBLEM TO BE SOLVED: To effectively prevent the rocking with a simple structure in a floating crane having two or more hanging hooks suspended from the jig tip of a crane device provided on a hull by arranging a plurality of wire ropes so as to be crossed in substantially X-shape between the jib tip and a connecting bar. SOLUTION: A floating crane 1 has two crane jibs 3, 3' rockable about a shaft 4 on a hull 2. Hanging hooks 7, 7' are suspended from the tips of the jibs 3, 3' by hoisting wire ropes 6, 6', respectively. A rocking preventing device is provided in order to prevent the rocking of each hanging hook 7, 7', and this device comprises a vertical connecting bar 13 for connecting two longitudinally arranged two hanging hooks 7, a horizontal connecting bar 14 for connecting two laterally adjacent hanging hooks 7, and control ropes 15, 15' suspended from the respective jibs 3, 3' and connected to the vertical connecting bar 13. The control wire ropes 15, 15' are arranged in substantially X-shape in a front view.