US Patent 11702297 Transfer method to drag grip target object

A method including gripping a first surface of a grip target object mounted on a mounting surface by the first grip portion; gripping a second surface crossing the first surface of the grip target object by the second grip portion; lifting the arm together with the first and second grip portions, to lift the grip target object; turning the first and second grip portions, to tilt the grip target object with respect to the mounting surface and bring the grip target object into contact with the mounting surface; maintaining the grip target object in a state of being tilted with respect to the mounting surface; and moving the arm together with the first and second grip portions, to drag the grip target object on the mounting surface.