| 摘要 |
PROBLEM TO BE SOLVED: To provide a cutting blade detection mechanism wherein light emitting and receiving sections need not to be constantly positioned in place against the cutting blade. SOLUTION: The cutting blade detection mechanism 60 comprises: a light emitting means 64 disposed on one side of a cutting blade 28 in the axial direction and facing the blade; and a light receiving means 78 disposed on the other side of the cutting blade 28 and paralleling to the light emitting section. The light emitting means 64 has a light emitting element 66, a light dispersion element 68 for dispersing and averaging the output light, and a first optical fiber beam 70; the light receiving means 78 has a light receiving element 80 and a second optical fiber bundle 82; the light emitting section 74 is composed of a serial light emitting body disposed serially to cover the whole blade of the cutting blade 28; and the light receiving section 86 is composed of a serial light receiving body disposed to cover the whole blade of the cutting blade 28 so that multiple optical fibers diverging from the second optical fiber bundle face one another. COPYRIGHT: (C)2009,JPO&INPIT
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