| 摘要 |
PURPOSE:To make winding smooth with a simple structure by moving a film with a sprocket gear in the initial stage of winding of the film and winding the film only with a spool after the film is wound around the spool. CONSTITUTION:In the initial stage of winding, the film is wound by a sprocket gear 1 and is fed to a spool 9. Since the spool 9 is set so that it is turned in a speed higher than that of a sprocket shaft 5, the film is wound around the spool 9. When the film is wound around the spool completely, the film tries to move in a speed higher than that of the sprocket gear 1. Consequently, the sprocket shaft 5 is pressed to a guide groove 3 through a screw 8 to be moved downward, and it is disengaged from a gear 12. Therefore, the film is wound smoothly by the rotation of the spool 9. Thus, the film is wound smoothly with a simple structure.
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