| 摘要 |
PROBLEM TO BE SOLVED: To obtain an image forming device capable of high-speed output by dividing developing devices into two groups so as to correspond with developing positions, and alternately carrying out image formation in the two developing positions. SOLUTION: A first developing device 31 and a second developing device 32 form a first group, and develop electrostatic latent images formed on a photoreceptor in a first developing position 11. Similarly, a third developing device 33 and a fourth developing device 34 form a second group, and develop electrostatic latent images formed on the photoreceptor in a second developing position 12. By separating the developing devices into two groups so as to correspond with the developing positions, and by alternately carrying out development in the two developing positions, output speed can become high in comparison with the case of a single developing position because time required for a preliminary operation for development is eliminated. Also, by dividing a plurality of developing devices into groups, the developing devices similar in development characteristic, such as an amount of electrification of toner in the developing device and an amount of carrying, can be controlled in the same group, therefore, this contributes to a reduction in the wasteful occupation of space by the arrangement of the developing devices. |
