| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-stage transmission which can suppress torsion of a tensioner arm and prevent wear of a rotation support and tilting of tension rollers. SOLUTION: The non-stage transmission is provided with a belt 15 wound between a driving pulley 11 and a driven pulley 21 both of the pulleys having such grooves the width of which are variable in the opposite directions with each other, and a tensioner device 50 for generating belt tension by pushing the belt 15. The tensioner device 50 is provided with a tension roller 51 which pushingly comes into contact with the slack side of the belt 15 from the outside, a tensioner arm 53 of which the one end portion 53a is rotatably supported by a transmission case 6 located at the radially outside of the driving pulley 11 and the other end portion 52a supports the tension roller 51, and a tension spring 54 and a compression spring 57 which enforce the tensioner arm 53 so as to turn in such a direction that the tension roller pushes the belt. The tension spring 54 is attached to one side surface at the other side of the tensioner arm 53, and the compression spring 57 is attached to the side surface at the opposite side of the attached portion of the tension spring attached to the other side of the tensioner arm 53.
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