APPARATUS AND METHOD FOR PREVENTING SWING OF LOAD BEING LIFTED BY CRANE

• Main Author: SHIMOZU TOSHIHITO
• Format: Patent
• Language: English
• Published: 06.11.2003
• Edition: 7
• Subjects: CRANES; HAULING; HOISTING; LIFTING; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES; PERFORMING OPERATIONS; TRANSPORTING

PROBLEM TO BE SOLVED: To provide an apparatus and a method for preventing the swing of load lifted by a crane, capable of preventing the swing of the lifted load without substantially causing noises regardless of the magnitude of the swing. SOLUTION: This apparatus has a pair of swing prevention wires 6a, 6b tensioned between a lifting lug and the trolley so as to obliquely cross each other and a pair of torque control motors 10a, 10b connected with respective trolley side end parts of the swing prevention wires in the crane which hangs the lifted load n with a lifting wire 3 through the lifting lug 5 wound down from a trolley 2 on a crane girder to convey the lifted load crossing the trolley. In this method, winding/unwinding speed of the lifting wire of a pair of the torque control motors is set so as to have a difference between them, the difference is given to tension between a pair of the swing prevention wires to give acceleration to the lifted load at the time of starting the operation, and the trolley is accelerated and decelerated corresponding to the speed of the lifted load. COPYRIGHT: (C)2004,JPO