| 摘要 |
PROBLEM TO BE SOLVED: To provide an oil-free chain with a joint link unit having a greatly reduced manufacturing burden of the chain while avoiding the reduction of the strength of plates and an increase in the number of components of the chain, for preventing the leakage of lubricating oil filled between a joint pin and a bush to the outside and the entry of dust from the outside and still preventing the leakage of lubricating oil filled between a connection pin and the bush to the outside and the entry of dust from the outside. SOLUTION: The oil-free chain 100 with the joint link unit comprises a chain body 110 and the joint link unit 120. The pressed-in plate 122 and the loosely fitted plate 123 have bush journaling annular recessed portions 122a, 123a, respectively, whose inside faces are recessed to be swollen to the outside face in an offset state, and the bush journaling annular recessed portions 122a, 123a encircle and support a bush protruded end 112a partially protruded from the outside faces of inner plates 113 located at both ends of the chain body 110. COPYRIGHT: (C)2009,JPO&INPIT
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