| 摘要 |
PURPOSE:To stabilize a page selecting operation to those which are different in the quality of a material and the thickness of a page sheet, and to execute effectively the selecting operation, by making a page selecting pulley of a page switching device movable, and energizing it in the center direction of a winding shaft by a spring. CONSTITUTION:A belt 24 of a page switching device is extended to plural pulleys 28-30 containing a page selecting pulley 22, so that the outside circumference of a page sheet member 21 wound around a winding shaft 20 is held and also the rotating axial force is transmitted. The selecting pulley 22 of this page switching device is energized toward the center direction of the winding shaft 20 by a spring 27, so that it contacts the outside circumference of the sheet member 21, and the sheet member 21 is always detached from contact with the selecting pulley 22. Also, a position where the sheet member 21 is detached from the selecting pulley 22 is made equal, irrespective of the quality of a material o r the thickness of a page sheet, and a stable page selecting operation is executed. |
