| 摘要 |
PURPOSE:To enable the continuous adjustment of the swing angle of an arm without stopping a driving crank, by providing a movable stopper on one end of the slider of a linkage of variable swing angle so that the stopper restricts the quantity of movement of the slider on a guide toward the butt of the arm. CONSTITUTION:One end of a first link 3 is coupled to the tip of a driving crank 1 by a first movable pin 2. One end of each of a second short link 5 and a third long link 6 is coupled to the other end of the first link 3 by a second movable pin 4. The tip of a driven arm 8 is coupled to the other end of the second link 5 by a third movable pin. A slider 10 is movably supported on a guide 9 provided on the driven arm 8. The other end of the third link 6 is coupled to one end of the slider 10 by a fourth movable pin 11. A stopper 12 for restricting the movement of the slider 10 on the guide 9 toward the butt of the driven arm 8 is provided on the other end of the slider 10. |
