| 摘要 |
PROBLEM TO BE SOLVED: To easily and rapidly mount a blade unit by providing a clamp plate and a blade, positions of which can be correctly registered. SOLUTION: At least one piece of fastening screw among fastening screws 4 for fixing blades 1.1 to blade retaining members 1.2 through clamping plates 1.3 is used as a positioning pin 4.3 from a viewpoint of structuring. Further, at least a part of the length of each of holes formed in the clamping plates 1.3 and the blade retaining members 1.2 is used as positioning holes 1.3.1, 1.2.1 and is constituted in such a way that the part of each of the holes fits the diameter of the positioning pins 4.3.
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