PROBLEM TO BE SOLVED: To enable a continuous operation with high accuracy by controlling the freedom of a levee-coating machine attached to a tractor so as to carry out an offset operation.;SOLUTION: The levee-coating machine 50 attached to the rear side of a traveling machine body 2 and carrying out the advancing levee-coating operation by an operation part 51 at the position offset sideward is equipped with a position and bearing sensor 20 for detecting the position and the bearing of the operation part 51, a means for constituting the first degree of freedom for controlling the relative position of the traveling machine body 2 and the operation part 51, a means for constituting the second degree of freedom for controlling the posture of the operation part 51, and a means for controlling the quantities of the horizontal rotation or the horizontal shift in the first degree of freedom and the second degree of freedom. The quantities of the horizontal rotation or the horizontal shift in the first degree of freedom and the second degree of freedom are controlled based on the information from the position and bearing sensor 20 so as to correspond to the posture of the traveling machine body 2 changed at the corner part of the field, to maintain the straightly advancing posture of the operation part 51 along the levee, and to keep the straightly advancing operation state to the vicinity of the corner part of the field.;COPYRIGHT: (C)2010,JPO&INPIT
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