| 摘要 |
PROBLEM TO BE SOLVED: To reduce noise and to improve noise and vibration performance. SOLUTION: A silent chain 1 is constituted by connecting a large number of link plates 2, 2' having a pair of tooth parts and pin holes by a connecting pin 3 by accumulating them in the thickness direction and in the longitudinal direction. In this case, a rack pitch p2 of the link plate 2' is made different from a rack pitch p1 of the other link plate 2 (p2>p1), and the link plate 2' like this is irregularly included in the chain longitudinal direction. Consequently, a seating state to a sprocket tooth with toes turned out changes at the time of seating with the toes turned out as engagement transfers from toes turned in to the toes turned out, and consequently, it is possible to reduce sound pressure and to improve noise and vibration performance.
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