| 摘要 |
PROBLEM TO BE SOLVED: To provide a change gear capable of preventing flexion of a sheave.SOLUTION: The change gear includes: a pair of sheaves 11, 12 provided on a rotary shaft 13, holding a winding power transmission body 20, changing a distance therebetween, and changing a winding radius of the winding power transmission body 20 to change a change gear ratio; an arm 31 whose bottom 31a is provided at a location at which it is not relatively displaced to one sheave 11 in a freely swing manner, and whose tip 31b is in slide contact with a back face of the one sheave 11; and a rod 32 whose one end 32a is coupled with the arm 31, whose other end 32b is coupled with the other sheave 12 at a location at which it is not relatively displaced, and which moves a slide contact position of the tip 31b of the arm 31 corresponding to a change of a distance between the pair of sheaves 11, 12. |
