| 摘要 |
<p>A cross section (A3) of an intermediate section (151-1c, 151-2c) of a fork shaft (151-1, 151-2) is formed into an ellipse, and the major axis of the ellipse is a first direction (S1) of high rigidity and the minor axis of the elliptical shape is a second direction (S2) of low rigidity. In addition, the first direction (S1) is arranged so as to be along a straight line (L3) connecting a first load acting point (P1) on which a load (F1) generated by a drive member (121) engaging with an engaging section (131a) acts, and a second load acting point (P2) on which a load (F2) by way of a fork section (141) driving a sleeve (191) acts.</p> |
