| 摘要 |
PROBLEM TO BE SOLVED: To restrain partial wear of a metallic element or a pulley to a minimum by preventing a V-plane from being inclined due to a load acting thereon from the pulley while reducing the V plane height of the metallic element. SOLUTION: By increasing a dimension of a non-contact part Hs in upper side of the V-plane 39 of the metallic element 32, the V-plane is prevented from being inclined due to the load from the pulley. For instance, assuming the V-plane height as Hv [mm] and the non-contact part height in the upper side of the V-plane 39 as Hs [mm], the V-plane height Hv and the upper side non-contact part height Hs are set so as to hold for the relationship as -0.5265 Hv+2.768<=Hs<=-0.5934 Hv+3.524. Thereby, the V-plane 39 is prevented from being inclined by the load and the partial wear of the V-plane 39 of the metallic element 32 and a V-groove of the pulley can be prevented even when pitting moment of the metallic element 32 due to the load acting on the V-plane 39 is decreased by reducing the V-plane height Hv.
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