JPH0130144B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cleaning device for an electronic copying machine that removes toner remaining on the surface of a photoreceptor and cleans the photoreceptor.

The image formed on the surface of the photoreceptor is transferred to a transfer paper by a transfer device, but since toner remains on the surface of the photoreceptor, it is necessary to remove the residual toner with a cleaning device.

Therefore, conventionally, as shown in FIG. 1, a brush 2 that contacts the photoreceptor 1 is provided, and after the brush 2 removes the toner remaining on the surface of the photoreceptor 1, a fan 3 is used to suck the toner. Alternatively, as shown in FIG. 2, a roller 4 that rolls into contact with the photoreceptor 1 is provided, and the toner is attached to the roller 4, and then the toner attached to the roller 4 is transferred to a blade 5.
It is scraped off by scraping.

However, in all conventional cleaning devices, toner scatters and the brush 2 and blade 5 become clogged, making it impossible to perform stable cleaning over a long period of time.

This invention was made in view of the above-mentioned circumstances, and its purpose is to rotate while in contact with a fur brush that comes into contact with a photoreceptor and wipes off residual toner, and at the same time, a brush band is spirally wound around the surface of the photoreceptor. A brush roller is provided to efficiently remove the toner adhering to the fur brush, and guide it to one side of the brush roller, thereby making it easy to clean the photoreceptor and to easily process the toner. The present invention aims to provide a cleaning device for a copying machine.

The present invention will be explained below based on an embodiment shown in the drawings. Reference numeral 11 in FIGS. 3 to 6 is a photoreceptor, which is designed to rotate in the direction of the arrow. A cleaning device 12 is provided adjacent to the photoreceptor 11 to remove toner remaining on the surface of the photoreceptor 11 and clean it. Next, this cleaning device 12 will be explained. Reference numeral 13 denotes a main body of the cleaning device, the front side of which is provided with an opening 14 facing the photoreceptor 11, and the rear portion of the cleaning device 12 having a collection box for storing the collected toner. 15 are provided. Further, inside the main body 13, a fur brush 16 (described later) that slightly protrudes from the opening 14 and contacts the surface of the photoreceptor 11, a brush roller 17 that contacts the fur brush 16, and a rubber roller 18 that contacts the brush roller 17 are provided. is installed. And these fur brushes 16,
One ends of the brush roller 17 and the rubber roller 18 are connected to a drive mechanism (not shown), and rotate in the directions of the arrows.

The fur brush 16 includes a cylindrical core body 19 made of a material such as Al or SUS, and a core body 19 made of a material such as Al or SUS.
an elastic body 20 such as polyurethane fitted onto the outer peripheral surface of the elastic body 20, a conductive contact agent 21 coated on the surface of the elastic body 20, and
1 and a synthetic fiber hair body 22 electrostatically flocked on top of the hair body 22. The hair body 22 has a length of 1 to 5 mm, and is adapted to rotate in the opposite direction while being pressed against the photoreceptor 11. The brush roller 17 also includes a cylindrical core body 23 and an elastic body 24 made of polyurethane or the like fitted to the outer peripheral surface of the core body 23.
and a brush band 25 spirally wound around the outer peripheral surface of the elastic body 24. This brush band 25 has unidirectionality by twisting together 15 strands of 14 denier at a density of 38,700 strands/inch ² and double weaving the pile with a thickness of 250 denier.
(Nippon Seal Co., Ltd. Product Name: Etiquette Brush)
Further, the rubber roller 18 is constructed by fitting a silicone rubber 27 having a smooth surface and a hardness of 45° to 50° onto the outer peripheral surface of the core body 26. The circumferential speed ratio of each of these rollers is set to photoreceptor: fur brush: brush roller: rubber roller = 1:1.5:3:4.5. Note that a blade 28 scrapes off the toner adhering to the rubber roller 18 and collects it in the collection box 15.

Next, the operation of the above embodiment will be explained.
When the photoconductor 11 is rotating in the direction of the arrow, the fur brush 16, the brush roller 17, and the rubber roller 18 are rotated in the direction of the arrow at the above-mentioned circumferential speed ratio. 16 to wipe it off. Therefore, although the toner adheres to the fur brush 16, the toner is removed by the brush roller 17. That is, since the brush band 25 on the surface of the brush roller 17 is oriented in the opposite direction with respect to its rotating direction, the toner adhering to the fur brush 16 is not only attached to the brush roller 17 but also removed by the spiral brush band 25. It is sent to one end of the brush roller 17 (in the direction of arrow A). Brush roller 17
The toner adhering to the brush roller 17 is scraped off by the rubber roller 18 that is rotating while in contact with the brush roller 17, and the toner adhering to the rubber roller 18 is scraped off by the blade 28 and collected in the collection box 15. be done. Therefore, the photoreceptor 11
Remove the toner adhering to the surface of the
5 can be recovered.

As explained above, the present invention includes a brush roller that rotates while in contact with a fur brush that contacts a photoreceptor and wipes off residual toner, and that has a brush band spirally wrapped around its surface that removes toner from the fur brush. Because of this provision, toner adhering to the fur brush can be efficiently scraped off and guided to one end of the fur brush. Therefore, the toner is not scattered and the toner can be easily collected.

[Brief explanation of drawings]

1 and 2 are schematic configuration diagrams of a conventional cleaning device, FIG. 3 is a longitudinal sectional front view of a cleaning device showing an embodiment of the present invention, and FIG. 4 is a perspective view of a brush band roller. FIG. 5 is a sectional view of the brush roller, and FIG. 6 is a plan view of the brush band of the brush roller. 11... Photoreceptor, 16... Fur brush, 17
...Brush roller, 18...Rubber roller.

Claims (1)

[Claims] 1. In a cleaning device for an electronic copying machine that cleans the surface of a photoconductor after transferring an image formed on the surface of the photoconductor, a fur brush that comes into contact with the photoconductor and wipes off toner remaining on the surface; As well as rotating while in contact with
A cleaning device for an electronic copying machine, comprising a brush roller having a brush roller wound spirally around the surface of the brush band for removing toner from a fur brush.