| 摘要 |
PROBLEM TO BE SOLVED: To provide a replacement method for an earth drill auxiliary hoist rope that facilitates replacement of an earth drill auxiliary hoist rope from a turn to three turns. ! SOLUTION: In a replacement method for earth drill auxiliary hoist rope from a turn to three turns, where two first and second auxiliary hoist sheaves each wound with an auxiliary hoist rope 34 that suspends an auxiliary hoist hook 35 at the tip of a sheave shaft arranged at the tip of a boom 12 provided on a base machine 11, an auxiliary hoist rope is replaced from a turn to three turns by comprising a leaving rope 37 wound around the second auxiliary hoist sheave to keep both ends fixed on the boom 12 to tilt the boom 12 forward for placement of the auxiliary hoist hook 35 on the ground, by releasing the fixture of the leaving rope 37 to move ends to a vicinity of the ground to make one end of the leaving rope 37 pass through the sheave of the auxiliary hoist hook 35 for coupling with the end of the auxiliary hoist r |
