| 摘要 |
An endless transmission belt is provided with a link plate, and a pair of joint pins that are retained by the link plate. Through the rolling of mutually contacting faces of the joint pins, link plates are mutually and rotatably connected into an endless chain. One joint pin of the pair is a pin with a large sectional area that transmits driving force from a pulley and the link plate, whereas the other joint pin of the pair is a pin with a small sectional area that transmits the driving force from the driving pin to the link plate. In order to reduce the concentration of stress on the side retaining the pin with a small sectional area, a peripheral width of the link plate on that side is made wider than the peripheral width on the side retaining the pin with a large sectional area.
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