| 摘要 |
PROBLEM TO BE SOLVED: To solve the problems of being unable to use due to breaking when a blade body is a fragile material in a case of caulking and fixing a member provided in a part for locking the mutual blade bodies, and of being unable to smoothly rotate since a rotary shaft inclines when increasing interposingly pressing force in a case where there is the rotary shaft of the blade body in a member for interposingly pressing and fixing the blade body.SOLUTION: A pair of blade bodies comprise a convex part for covering the periphery of a rotary shaft body on an opposite surface of a surface of opposing these mutual blade bodies, and comprise a cover body having a concave part for covering this convex part and constituted so as to expose an edge of this blade body. This cover body holds the pair of mutual blade bodies by energizing its convex part in the rotary shaft direction. Since the rotary shaft of the blade body is determined by the rotary shaft body, the blade body can smoothly rotate without looseness without selecting a construction material and a size. |
