DROP DEVICE OF WIRE ROD OF LIFT-UP DEVICE AND DROP METHOD OF WIRE ROD IN LIFT-UP TECHNIQUE

摘要

PROBLEM TO BE SOLVED: To enhance working properties of work repeating lifting by a jack type lift-up device.SOLUTION: A drop device 10 is a device which is installed for a jack type lift-up device 100 for lifting a lifting object by pulling up PC steel wire 102 connected to the lifting object by a hydraulic jack, and drops the PC steel wire 102, and includes: a mono-rope 12 extending from a joint to the lifting object of the PC steel wire 102; and a winch 16 which follows the mono-rope 12 to the PC steel wire 102 pulled up by the lift-up device 100 while dropping the PC steel wire 102 by pulling down the mono-rope 12.