| 摘要 |
PROBLEM TO BE SOLVED: To obtain a shaking out-type knife capable of increasing the safety by strengthening the axially bearing structure of blades, capable of preventing grass-entangling near the axially supported part of the blade by a rotor and also being increased in cutting qualify, and to obtain its blade. SOLUTION: The blade 10 is composed of a blade body 1, two supporting plates 2, a bolt 4 and an insertion tube 3. Inserting holes 11 and 21 and boltholes 12 and 22 are perforated at the blade body 1 and the supporting plates 2 respectively. The diameter of the inserting hole 11 is formed a little larger than the inserting holes 21. If the bolt 4 is broken and fixing between the blade body 1 and the supporting plates 2 is untied, the user can recognize an abnormality in its early stages by being notified with chattering of clash of the inserting hole 11 with the insertion tube 3.
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