JP2002132111A5 - - Google Patents

Claims (7)

An image carrier on which a toner image is formed, a cleaning device for removing toner adhering to the surface of the image carrier after the toner image is transferred to a transfer material, and a toner through which the toner removed by the cleaning device passes An image forming apparatus comprising: a transfer surface; and a toner accumulation preventing member that gives an impact to the toner passing on the toner transfer surface.
The toner accumulation preventing member repeats a reciprocating motion substantially along the toner transfer surface, and repeats an operation in which the downstream end of the toner accumulation prevention member approaches and separates from the toner transfer surface. An image forming apparatus comprising drive means for driving the toner accumulation preventing member.   The image forming apparatus according to claim 1, wherein the toner accumulation preventing member is bent in a direction in which an intermediate portion in a toner transfer direction protrudes with respect to a toner transfer surface.   The image forming apparatus according to claim 2, wherein a small protrusion is formed on the toner transfer surface to contact the toner accumulation preventing member while reciprocating.   The toner accumulation preventing member has a state in which a portion other than a downstream end portion in the toner transfer direction is in contact with the small protrusion and a downstream end portion in the toner transfer direction is in contact with the toner transfer surface; Driven by the driving means so that the bent portion of the prevention member or a portion in the vicinity thereof abuts on the small protrusion and the downstream end in the toner transfer direction is farthest from the toner transfer surface. The image forming apparatus according to claim 3.   A toner dropping port through which the toner sent on the toner transfer surface falls is formed at a portion downstream of the toner transfer surface with respect to the toner transfer direction, and a downstream end portion of the toner accumulation preventing member in the toner transfer direction is The image forming apparatus according to claim 1, wherein the operation of abutting or separating from a peripheral portion of the toner dropping opening is repeated.   A rotation conveying member that conveys the toner removed from the image carrier by the cleaning device to the toner transfer surface; the toner accumulation preventing member is engaged with the rotation conveying member; 6. The image forming apparatus according to claim 1, wherein the toner transfer surface is inclined in a direction that decreases from an upstream side in the toner transfer direction toward a downstream side in the toner transfer direction. .   An image carrier on which a toner image is formed, a cleaning device for removing toner adhering to the surface of the image carrier after the toner image is transferred to a transfer material, and a toner through which the toner removed by the cleaning device passes And a toner accumulation preventing member that gives an impact to the toner passing on the toner conveying surface. The toner accumulation preventing member repeatedly reciprocates substantially along the toner conveying surface and prevents the toner accumulation. An image forming unit that is driven so as to repeat the operation in which the downstream end of the member in the toner transfer direction approaches and separates from the toner transfer surface.