PROBLEM TO BE SOLVED: To provide a rotary cutting blade for providing the sufficient cost effect, by efficiently cutting a cutting object by enlarging the depth of a jagged blade, and reducing its replacement frequency by lengthening the service life of the cutting blade.SOLUTION: A rotary cutting blade comprises a first blade body for forming an installation hole in a central position and integrally forming a first jagged part in a plane shape in an outer peripheral part and a second blade body having a second jagged part of the same shape as the first jagged part of the first blade body and joined-fixed in a coaxial shape to the first blade body by dislocating the second jagged part by a predetermined angle in the circumferential direction with the first jagged part of the first blade body, and a blade part is formed on the rear side of becoming the rear side in at least the rotational direction of respective V-shaped recessed parts of the first jagged part and the second jagged part, so that a V-shaped jagged blade is formed between the V-shaped recessed part of the first jagged part and the V-shaped recessed part of the second jagged part.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】ギザギザ刃の深さを大きくし得て被切断物を効率良く切断できると共に、切断刃の寿命を延ばしてその交換頻度を低減でき、十分な費用対効果が得られる回転切断刃を提供する。【解決手段】中心位置に取付孔が形成され外周部に第１ギザギザ部が平面状に一体形成された第１の刃体と、第１の刃体の第１ギザギザ部と同一形状の第２ギザギザ部を有し、該第２ギザキザ部が第１の刃体の第１ギザギザ部と円周方向に所定角度ずらして第１の刃体に同軸状に接合固着された第２の刃体とを備え、第１ギザギザ部と第２ギザギザ部の各Ｖ字凹部の少なくとも回転方向後方側となる後辺に刃部が形成されることで、第１ギザギザ部のＶ字凹部と第２ギザギザ部のＶ字凹部間にＶ字形状のギザギザ刃が形成されていることを特徴とする。【選択図】図２
