摘要 |
A tensioner device (21) having a tensioner unit (22) and a lever (29) urged by the tensioner unit into slide contact with a chain (C) includes a plunger rotation inhibiting mechanism (24b, 32a) disposed between the front end portion of a plunger (24) and a portion of the lever (29) to inhibit the plunger from rotating about the axis thereof such that the front edge of each prong of a ratchet (26) is kept separating from the bottom land of a mating one of rack teeth (24a) formed on an outer surface of the plunger along the axis thereof. The ratchet prong is substantially free from wear and has an improved degree of durability. <IMAGE> |