| 摘要 |
PROBLEM TO BE SOLVED: To improve the quality of a cutting face and lengthen the service life of a cutting single beveled blade. SOLUTION: A cutting single-beveled blade 10 is provided with a first blade edge face 28 beveling at an angle ofθ1 from a blade edge 22 with respect to a back face 26, and a second blade edge face 30 beveling at an angleθ2 from the terminus of the first blade edge face 28 with respect to the back face 26. When the first blade edge face 28 cuts a product sheaf 34 of sheet material 12, guard sheets 14, cardboard 16, the following second blade edge face 30 pushes the cut product sheaf 34 away to the outside. Load applied to the first blade edge face 28 is thereby reduced, and the service life of the cutting single-beveled blade 10 is lengthened. In addition, sticking of chips to the blade edge face is suppressed, and since a counter beveled face 26A is formed at the blade edge 22, cutting can be performed in a stable state from the beginning.
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