Patent ID: 8826785

Claim:
A cutting machine comprising: a rotary face plate which has a cut material passing hole at its center and is held by a frame rotatably about the passing hole, the rotary face plate being rotated at a required angle by a rotating motor provided for the frame; a swing arm which is pivotally supported at one end thereof on a first side of the rotary face plate and, at the other end thereof, is swingably held between an outer peripheral side of the face plate and an inner circumferential side of the passing hole via a pivot; a rotation driving motor which is placed on a second side of the rotary face plate, the second side of the rotary face plate being opposite to the first side of the rotary face plate, and the rotation driving motor transmits rotational drive force to the swing arm via a driving shaft in the pivot of the swing arm, the driving shaft extending through the rotary face plate from the second side to the first side; a swing motor which is placed on the second side of the rotary face plate and transmits swing force to the swing arm via a collar in the pivot of the swing arm, the collar extending through the rotary face plate from the second side to the first side, and the driving shaft being pivoted inside of the collar; a cutting rotary blade pivotally supported at the other end of the swing arm; a mechanism for transmitting the rotational drive force from the rotation driving motor to the cutting rotary blade, the mechanism being provided within the swing arm; swing angle control means for varying the swing angle of the swing arm according to the dimensional shape of the cut material so as to bring the cutting rotary blade into contact with the cut material when the cut material is cut; and rotational angle control means for rotating, at a required angle on its axis, the rotary face plate including the swing arm mounted thereon for pressing the cutting rotary blade against the cut material.