Device for cutting structure and method for cutting structure

A method for cutting a cutting object included in a structure by using a cutting device, the method comprising:

• a cutting device preparation step of preparing the cutting device that includes a grasp unit including a first grasper and a second grasper that are movable in an opening and closing directions, in which direction the first grasper and the second grasper come close to each other or go away from each other, to grasp the cutting object therebetween in the opening and closing directions, a drive mechanism that moves the first grasper and the second grasper relatively to each other in the opening and closing directions, a cutting unit disposed side by side with the first grasper and the second grasper to cut the cutting object with a movement of the cutting unit in a cutting direction along with the opening and closing directions, a main unit supporting the first and second graspers movably in the opening and closing directions and supporting the cutting unit movably in the cutting direction, and a feed mechanism that moves the cutting unit in the opening and closing directions;
• a grasp unit positioning step of positioning the cutting device to locate the cutting object between the first grasper and the second grasper;
• a grasping step of moving the first grasper and the second grasper relatively to each other in a closing direction that is one of the opening and closing directions, the first grasper and the second grasper coming close to each other in the closing direction, to thereby cause the first grasper and the second grasper to grasp the cutting object;
• position setting step of setting a cutting start position based on the position of the first grasper and setting a cutting end position based on the position of the second grasper when the first grasper and the second grasper are grasping the cutting object;
• a cutting unit positioning step of causing the feed mechanism to move the cutting unit in the opening and closing directions to position the cutting unit at the cutting start position;
• and a cutting step of causing the feed mechanism to move the cutting unit from the cutting start position to the cutting end position to cut the cutting object.