PURPOSE: To avoid damage accidents and enhance efficiency by joining a rotary gear case in communication with a suction tube serving as an arm and rotatively mounting and oscillating an excavation tooth and finely crushing excavated earth and sand and sucking up them from a suction opening.
CONSTITUTION: A suction tube which serves as an arm 1 is deflected and fell down to a mini-shovel car, thereby moving an excavation attachment A on the tip to an intended position. Then, a hydraulic drive motor 7 is operated together with the operation of a suction device while a rotary tooth 5 integrally fixed with a rotary shaft 6 is rotated. Then, a fork type excavation tooth 14 is oscillated by the operation of an excavation cylinder 11, thereby emitting earth and sand smoothly. This construction makes it possible to enhance the efficiency of excavation work.
SUGII NOZOMI
MAMIYA TAKESHI
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