| 摘要 |
<p>PURPOSE:To feed a sheet in a light load state in the case of feeding and reversely feeding the sheet by providing a rotation control means for rotating the driving mechanism of a rotary shaft on a side where the sheet is drawn out, between 1st and 2nd rotary shafts, in a sheet drawing-out direction. CONSTITUTION:A one-way rotation driving transmitting mechanism 11 is provided between the 1st and the 2nd rotary shafts 53 and 54 and 1st and 2nd driving mechanisms 10 and 95 being the driving mechanisms of the respective shafts 53 and 54. Therefore, the rotation in the direction where the sheet 51 wound around the rotary shaft is drawn out, between the rotation of the 1st mechanism 10 and that of the 2nd mechanism 95, is not transmitted from the driving mechanism 10 to the rotary shaft. When the driving mechanism 10 of the rotary shaft on the side where the sheet 51 is drawn out is driven to be rotated in a sheet drawing-out direction by a rotation control means 90 in the case of feeding or reversely feeding the sheet 51, the back electromotive force is not generated and heavy load is not applied because the mechanism 10 is not in a non-excited state even though rotational force is transmitted to the mechanism 10 from the external by drawing out the sheet. Therefore, the torque of the mechanism 10 for drawing out the sheet 51 is restrained to be small. Thus, the load in the case of feeding and reversely feeding the sheet is made light.</p> |
