| 摘要 |
PURPOSE:To easily control toner supply by driving the screw of a selected developing device directly from outside a revolving unit. CONSTITUTION:A toner supply device consists of plural toner hoppers 150a-150a which are arranged outside one-side rotating frames 37 of developing devices 14a-14d opposite the developing devices 14a-14d, hollow coupling members 151a-151d which couples the toner hoppers 150a-150d with the respective developing devices 14a-14d so that they rotate together and are supported on one-side rotating frame 37 so as to rotate coaxially with rotating support shafts 40a-40d of the developing devices, and screws 152a-152d which are rotated by rotary driving means 160 incorporated in the coupling members 151a-151d to convey and supply toner T in the toner hoppers 150a-150d to the developing devices 14a-14d. The screw of a selected developing device, e.g. 14b is driven directly from outside the revolving unit, so the toner supply is easily controlled. |
