| 摘要 |
PROBLEM TO BE SOLVED: To provide a back hoe capable of reliably performing excavation fully close to a wall even in the excavation close to the wall. SOLUTION: Each of a pair of right and left crawler traveling devices 1 is operable in a transversely movable manner to a frame 2, a base 3 of revolver is turnably provided on the frame 2 around the longitudinal axis X so that the turning locus S of an outer circumferential surface of the base 3 of revolver is substantially brought into contact with each outer end of the right and left crawler traveling devices when the right and left crawler traveling devices 1 are brought closest to the longitudinal axis X.
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