| 摘要 |
PROBLEM TO BE SOLVED: To ensure transmission efficiency, and prevent generation of damages such as seizures. SOLUTION: When representing the maximum value of the circumferential speed of a first cylindrical surface 22 as Umax (m/sec) at use, and a means value of contact pressure, based on the preload of a compression coil spring 25, on an outside diameter side abutment part 27b related to a wedge roller 11 as Pmean (Gpa) Pmeans> Umax)1/2}/9 or Pmean>0.3 (GPa) is satisfied. With this constitution, generation of extreme slippage at abutment parts 26a, 26b, 27a, 27b on the inner diameter side and the outer diameter side is prevented.
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