| 摘要 |
PURPOSE:To simplify such operation that a driving-side joint plate is separated from or made to press-contact with a driven-side joint plate and to simplify structure for separating the drivingside joint plate from and making it press- contact with the drivenside joint plate. CONSTITUTION:An intermediate shaft 43 is movably supported in a shaft direction(directions shown by arrows B1 and B2) by a frame 24 and pressed in the direction shown by the arrow B2 by a coil spring 25. The shaft 43 is constituted so as to be fixed in the shaft direction by frictional force generated between the frame 24 when tensile force is imparted to a rotational force transmitting belt 28 by a belt tensioner 31. A user can easily turn a lever 33 in a direction shown by an arrow C1 and separate a tension roller 32 from the belt 28 by grasping a grip for moving a belt tensioner 41. Besides, when the user releases the grip 41, the lever 33 is turned in a direction shown by an arrow C2 by the pressing force of a coil spring 311. Then, the roller 32 is made to press-contact with the belt 28. |
