| 摘要 |
PURPOSE:To accurately attain transmission by providing a control range detector for detecting the proper tension range of an adjust spring of a tension pulley for stretching and pressing an endless transmission member and an excessive slack detector. CONSTITUTION:An endless member 1 is stretched between a driving pulley 8 and a driven pulley 9 which are respectively supported on a driving shaft 6 and a driven shaft 7 supported on a machine body of an agricultural machine or the like. There are provided a control range detector 4 for detecting the proper tension range for keeping constant tension of an adjust spring 3 for pressing a stretching and pressing tensioi pulley 2, and an excessive slack detector 5 for detecting the excessive slackening of the endless member 1. In this arrangement, the endless member 1 can be easily retained under proper tension. |
