Patent ID: 7032485

Claim:
A shearing apparatus for shearing a plate member, comprising: a pair of shearing rollers configured to shear a plate member into a predetermined length while passing the plate member between said pair of shearing rollers, wherein said pair of shearing rollers are rotated in opposite directions in a state that the plate member is pinched by and between said pair of shearing rollers, wherein said pair of shearing rollers include plural pairs of shearing portions to be engaged with each other to shear the plate member, said plural pairs of shearing portions being formed on peripheral surfaces of said pair of shearing rollers and extending in an axial direction of each of said pair of shearing rollers, wherein each of said pair of shearing rollers is constituted by a plurality of divided members formed by dividing a generally cylindrical member with a dividing surface passing an axis of the columnar member and integrally assembled overlapping with each other with said plurality of divided members shifted in a radial direction thereof, whereby each of said pair of shearing rollers is provided with a plurality of stepped portions each extending in said axial direction on said peripheral surface and arranged at intervals in a peripheral direction thereof, and wherein a rising face and a protruded edge of said stepped portion constitute a shearing face and a shearing edge, respectively.