| 摘要 |
PROBLEM TO BE SOLVED: To provide a cutting blade device of a bush cutter capable of simply (dis)assembling a revolving plate without requiring exclusive tools and enabled to be convenient for changing the cutting blade. SOLUTION: In this cutting blade device for bush cutters, a revolving plate 1 is constituted to be separable to an upper plate 2 and a lower plate 3 an internal coupling cylinder 6 is vertically installed to the plate face of the upper plate 2, an engaging piece 7 having an engaging nail 8 is formed and installed to the internal coupling cylinder 6, plural stopping shafts 9 holding cutting blade pieces 4 to the shafts are vertically installed to the external plate face of the internal coupling cylinder 6, an external coupling cylinder 12 is installed to the plate surface of the lower plate to protrude both upper and lower surfaces, plural reinforcing ribs 16 are installed around a grounding plate and an opening port 14 having an engaging rim 15 for engaging the engaging nail is made to open at a side face of the external coupling cylinder between adjacent reinforcing ribs.
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