| 摘要 |
PROBLEM TO BE SOLVED: To make a driving sprocket and a conduction chain replaceable without reassembling by a method in which a rotary shaft on the driving side, with an intermediate conduction shaft pivoted on a bearing support member, is set freely insertably/extractably on the inner circumference side through a key and a key channel, and a driving mechanism is set on the outer circumference side of the intermediate conduction shaft for conduction. SOLUTION: The rotary shaft 20a on the driving side is formed in the shape of a shaft lever engaging freely insertably/extractably with an intermediate conduction shaft 5, and on the circumferential surface, a key channel d3 to which a key d2 to be engaged with a key channel d1 formed in the inside surface of the boss part 21 of a cylindrical separation net 2 is fitted and a key channel e3 to which a key e2 to be engaged with a key channel e1 formed in the inside surface of the shaft 5 are formed. The rotary shaft 20a is inserted into the inner void of the shaft 5 engaged with the boss part 40 of a sprocket 4 which is a driving mechanism in the outside, and the inner end side is set to the boss part of the separation net 2 and connected in the rotation direction through the key d2 and the key channels d1, d3.
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