| 摘要 |
PURPOSE:To prevent noise for every one rotation by storing a waste toner, which is carried from a cleaner by a carrying screw, into a drum from an aperture part provided on a drum revolving shaft. CONSTITUTION:A drum revolving shaft 11 has an internal-side end wall 13 closed, and aperture parts 12 are provided near the end wall 13. The end wall 13 is so placed that the free end part of a flexible carrying screw 4 is brought completely into contact with the end wall 13, and concretely, the carrying screw 4 is 10-15mm. shorter than the free length when the carrying screw 4 is brought into contact with the end wall 13. Since the carrying screw 4 itself has a spring property by the rear end wall 13 provided in the drum revolving shaft 11, the en part of the carrying screw 4 is restricted properly with respect to the position in the axial direction and is not completely free, and therefore, noise is not generated for every one rotation. Since there are no tapers or the like between the outside diameter of the carrying screw 4 and the inside diameter of the drum revolving shaft 11 and a proper gap is provided between them, the waste toner does not clog the part between them. |
