PURPOSE: To locally remove the attachment attached thereto by arranging the peripheral edge part dust removing means removing the attachment of the outer peripheral edge part while sliding along the plane peripheral edge part of a work, the plane face part dust removing means removing the attachment of this face by suction along the plane of the work, along the transfer route of the work.

CONSTITUTION: A peripheral edge part dust removing means (consisting of a rotary brush and suction means) provided at the robot arm tip is slided with the large curvature part of the work peripheral edge part and the part where the mutual faces are crossed at a large angle, and the attachment attached thereto is removed by the sliding action. Regarding the attachment splashed by this dust removing action and that fitted to the plane part, they are removed by the suction action of the plane part dust removing means (consisting of the dust removing units 70, 90 of the upper face and side face) arranged at the lower side in the transfer direction of the work.