| 摘要 |
<p>A tensioner, comprising a case (1), a first shaft member (2) stored rotatably in the case (1) and of which axial movement is restricted, a second shaft member (3) screwed onto the first shaft member (2), and a spring (5) providing a rotating force to the first shaft member (2), wherein the second shaft member (3) is restricted in rotating with respect to the case (1) and allowed to move in axial direction, an axial load (Z) from a force transmitting member such as a chain and a belt acts on the first shaft member (2), an end face (22) of the first shaft member (2) comes in contact with a receiving surface (19) of the case (1) through a washer (9), the end face (22) receives the axial load (Z) acting on the second shaft member (3), and the flatness of the end face (22) of at least the first shaft member (2) is reduced to 15 νm or less.</p> |
