CONTROL METHOD FOR PAPER FEED MECHANISM

PURPOSE:To aim at miniaturizing a paper feed mechanism by controlling the paper feed mechanism with the use or the combination of an upper limit detecting sensor which is turned on when a pressurization is completed and an end detecting sensor which is turned on when the release of fed pressure is completed. CONSTITUTION:When a cassette bed is set so that a lift motor 9 is normally rotated, a gear 4 is rotated counterclockwise so that a lever 2 shields an upper limit detecting switch 10, and therefore, the lift motor 9 is stopped. At this time, a lever 14 is pressed by means of the bottom plate 12 associated with the lever 2 so that an end detecting switch 15 is not shielded due to an opening in the shield plate 1. Upon paper end, the end detecting switch 15 is shielded by the shield part (a) of a shield plate 1. Thereafter, when the elevating motor 9 is reversed, the lever 2 is pulled out from the upper limit detecting sensor 10 while the shield plate 1 is pushed by a pressing arm 11 so that the end detecting switch 15 is shielded and released. Accordingly, it is possible to control the paper feed mechanism by the combination of the detecting switches.