JPH0143718Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a cleaning device for removing residual toner adhering to the photoreceptor from the photoreceptor after the toner image on the photoreceptor is transferred to transfer paper in an electronic copying machine having a wet developing device. .

Conventionally, a cleaning roller is arranged so as to be in elastic pressure contact with the part of the photoconductor where residual toner is attached, and the cleaning roller is moved so that the outer peripheral surface that contacts the photoconductor moves in the opposite direction to the photoconductor. A cleaning device is known that removes residual toner from a photoreceptor by rotating the photoreceptor.

With this cleaning device, if the transfer paper is not separated from the photoconductor by the transfer paper separation device, the transfer paper will wrap around the cleaning roller, impairing the function of the cleaning roller, and the transfer paper wrapped around the cleaning roller will also damage the photoconductor. There are some disadvantages as well.

An object of the present invention is to provide a cleaning device that can overcome the above-mentioned drawbacks.

The features of this invention include a cleaning roller that elastically presses against the photoconductor to which residual toner is attached and removes residual toner from the photoconductor; The transfer paper is composed of a paper separation roller that separates the transfer paper to be separated, and a guide member that guides the transfer paper separated by the paper separation roller in a predetermined direction.

The present invention will be explained in detail based on the illustrated embodiments below.

In FIG. 1, reference numeral 1 indicates a drum-shaped photoreceptor. This photoreceptor 1 is rotated in the direction of arrow a by a driving means (not shown). Around the photoreceptor 1, in addition to a cleaning roller 2 and a cleaning blade 3, a charging device (not shown),
An exposure device, a wet developing device, a transfer paper supply device, a transfer device, a transfer paper separation device, a fixing device, a static eliminator, and the like are arranged at predetermined positions.

The cleaning roller 2 is made of a flexible member such as sponge. The cleaning roller 2 is fixed to a rotating shaft 2a, and a portion of its outer peripheral surface is elastically pressed against a portion of the photoreceptor 1 to which residual toner is attached. The cleaning roller 2 is rotated by a driving means (not shown) in the direction of arrow b so that the outer circumferential surface in contact with the photoreceptor 1 moves in the opposite direction to the photoreceptor 1, that is, in the direction of arrow b. The cleaning roller 2 is indicated by arrow b
While rotating in the direction, the toner is elastically pressed against the photoreceptor 1 to remove residual toner on the photoreceptor 1.

A plurality of paper separation rollers 4 are arranged so as to be in pressure contact with the cleaning roller 2. These paper separation rollers 4 are made of a hard material such as synthetic resin, and are rotatably supported by a holding member 5. The end of the holding member 5 on the side far from the cleaning roller 2 is rotatably supported by a curved guide member 6. The holding member 5 is provided with a tension spring 7, and this spring 7 urges the holding member 5 so that the paper separation roller 4 comes into pressure contact with the cleaning roller 2. The paper separation roller 4 is
Since the cleaning roller 2 is flexible, it is in pressure contact with the cleaning roller 2 with a recess formed therein, and is rotated in the direction of arrow c by the frictional force with the cleaning roller 2.

If the transfer paper from the photoconductor 1 is not separated by the transfer paper separation device and reaches the cleaning roller 2 in close contact with the photoconductor 1, the transfer paper 8 will adhere to the cleaning roller 2 and be carried along with it. It may move. In this case, the transfer paper 8 adhering to the cleaning roller 2 and moving is separated from the cleaning roller 2 by the paper separation roller 4 and sent in the direction of the guide member 6. Another guide member 9 is arranged on the side of the guide member 6 in the direction in which the transfer paper 8 is ejected. The cleaning roller 2 is moved by these guide members 6 and 9.
The transfer paper 8 separated by the paper separation roller 4 is guided in a predetermined direction and discharged.

The cleaning device of the present invention can effectively prevent the transfer paper from wrapping around the cleaning roller, so even if the transfer paper reaches the cleaning roller, the function of the cleaning roller will not be impaired. can effectively prevent injury.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing the cleaning device of the present invention, and FIG. 2 is a side view showing the main parts of the cleaning device of the present invention. 1...Photoconductor, 2...Cleaning roller,
4... Paper separation roller, 6, 9... Guide member.

Claims (1)

[Scope of utility model registration request] A cleaning roller is elastically pressed against the part of the photoconductor where residual toner is attached, and the outer peripheral surface of the contact rotates in the opposite direction to the photoconductor to remove residual toner from the photoconductor. a paper separation roller that separates the transfer paper that adheres to the cleaning roller by contact with the cleaning roller;
A cleaning device comprising a guide member that guides the transfer paper separated by the paper separation roller in a predetermined direction.