| 摘要 |
PROBLEM TO BE SOLVED: To provide a ground excavator improving the efficiency of the excavation left work without making two actions with the right land and preventing an erroneous action. SOLUTION: This ground excavator is provided with a kelly bar winding/ unwinding lever 22 operated by the right hand to vertically move a kelly bar 15, a turning lever operated by the left hand to turn an upper revolving superstructure, a throttle pedal 23 operated by the left foot in cooperation with the kelly bar winding/unwinding lever 22 or the turning lever when the kelly bar 15 is wound or unwound or at a turn, and a turn lock pedal 51 operated by the right foot for the lock or lock release of a lock device 29 locking the turn of the upper revolving superstructure. A kelly bar winding/unwinding lever 50 can be invariably operated by the right hand, thereby the work efficiency is improved, and an erroneous action can be prevented.
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