JPS59116776A - Fur brush cleaning device - Google Patents

Abstract

PURPOSE:To provide a good cleaning characteristics and to maintain normally a fur brush for a long period of time by bringing a member having a combing function of low electric resistance into contact with said brush. CONSTITUTION:A fricker brush 3 for destaticizing formed by flocking acrylic carbon fibers having 150 denier/24 filaments size and 5-10mm. hair height at a density of about 3,500 pieces/cm<2> is in contact with a fur brush 2. The brush 2 wipes away the toner sticking on the surface of a photosensitive drum 1 by contacting slidingly with said surface. The electrostatic charge in the brush 2 generated by the frictional contact is immediately removed by the conductive fricker brush 3 in contact with the brush 2 so that the electrostatical sticking of the toner in the brush 2 is prevented. The brush 2 receives a mechanical combing effect by contact with the brush 3 and is thus removed of permanent set, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a fur brush cleaning device used in an electrophotographic apparatus.

(Prior Art) Cleaning brushes for electrophotographic devices are usually made of nylon, rayon, or
Fine fibers such as vinylon and acrylic resin, preferably fibers with a diameter of 5 denyl/filament or more, are used, but these generally have an extremely high electrical resistance and are suitable for sliding contact with mating members such as photoreceptors and flickers. If the frictional charging series of S is far apart, the charging state becomes unstable, and this phenomenon has a great effect on the cleaning effect, causing the cleaning performance to fluctuate greatly due to changes in temperature, humidity, or changes over time. This causes problems such as afterimages appearing on copies due to poor cleaning.

The device disclosed in Japanese Patent Publication No. 50-34415 applies charges of the opposite polarity to the toner to the brush and charges of the same polarity to the toner to the flicker by selecting materials for the brush, flicker, and car. It effectively removes residual toner on the surface of the photoreceptor using its electrostatic attraction, and at the same time prevents toner from adhering to the flicker to maintain initial cleaning performance over a long period of time. However, in this device, it is necessary to bring the brush into strong contact with the flicker in order to obtain sufficient frictional charge on the brush, which is disadvantageous in that it promotes deformation of the brush and significantly reduces its durability. has.

(Objective) The present invention has been made in view of the above disadvantages, and the object thereof is to provide a fur brush cleaning device which has good cleaning performance and is capable of properly holding the brush for a long period of time. It is about providing.

(Structure) Therefore, details of the present invention will be explained below based on illustrated embodiments.

FIG. 1 shows a cleaning unit to which the present invention is applied, and the reference numeral 2 in the figure rotates while slidingly contacting the surface of the photoreceptor drum 1, and is used to wipe away residual toner adhering to the surface of the photoreceptor drum 1. For example, use a fur brush to brush 700 rayon fibers of 600 denier/100 filament thickness.
It is constructed as a densely planted brush at a density of approximately 0 trees/cm'. For example, this fur brush has a thickness of 150 denier/24 filaments of 5 to 10 mm.
Acrylic carbon fiber with pile of 3500 wood/c
The flicker brush 3 for static elimination, which has hairs flocked at a density of approximately
It rotates at a rotation speed of 1100 rpm or less.

In addition, the reference numeral 4.5 in the figure indicates the fur brush 2 and the flicker.
Flicker for removing toner attached to brush 3
Plate 6 indicates a screw conveyor for collecting toner.

In the above-described embodiment, the fur brush 2 wipes off the toner stuck to the surface of the photoreceptor drum 1 while slidingly contacting the surface, but the electrical charge in the fur brush 2 generated during this frictional contact is The conductive flicker brush 3 in contact with this brush 2 immediately removes the toner and prevents the toner from electrostatically adhering to the fur brush 2. is subjected to mechanical combing to remove curls, etc.

The embodiment shown in FIG. 2 uses a conductive comb 7 as the above-mentioned flicker brush 3 which also serves as a charge remover.
Comb teeth made of piano wire with pars removed from nrnφ to 1.0 mrnφ 8. ... are fixed to the ridge part 9 at a pitch of 2 mm, and the fur brush 2 is constantly combed with the comb teeth 8, and at the same time, the electrical charges in the brush 2 are removed.

(Effects) As described above, according to the present invention, since a member having a combing function with low electrical resistance is brought into contact with the fur brush, the frictional electrification generated on the brush can be reduced by having a large contact area with the brush. It is possible to reliably remove toner particles and eliminate various inconveniences caused by charging of the brush, such as toner adhesion to the brush and poor cleaning function. Moreover, since the member and the brush are brought into contact so that they can move relatively, the fur brush can be maintained at a normal state of 7g at all times due to the effective combing action of the member, making it possible to use it for a long period of time. can.

[Brief explanation of the drawing]

Figure 1 shows a cleaning unit to which the present invention is applied.
- Cross-sectional view showing an example; FIG. 2 is a perspective view of an apparatus showing another embodiment of the present invention. 1...Photosensitive drum, 2...Fur brush 3
...Flicker Brush, 7...4e Applicant Rico Co., Ltd. - Agent Patent Attorney Keiji Nishikawa

Claims (1)

[Claims] In a cleaning device equipped with a fur brush that comes into sliding contact with an electrostatic image carrier to wipe away colored charged particles remaining on the surface thereof, the fur brush is provided with a combed member having low electrical resistance that moves relative to the fur brush. A fur brush cleaning device characterized in that the fur brushes are in contact with each other.