JPS5855959A - Cleaning device for electrophotographic copier - Google Patents

Abstract

PURPOSE:To discharge the ozone around a photoreceptor efficiently by connecting the shields of Corotrons near a cleaner body and the housing of the cleaner, recovering the ozone into the cleaner by the air flow, etc. of fur brush rolls, and decomposing the same with an ozone filter. CONSTITUTION:A Corotron 9 for charging and a precleaning Corotron 10 are installed before and behind a cleaner body 2. The Corotrons 9, 10 consist of shields 9a, 10a of a channel shape in section of which the opening parts direct to a photoreceptor 1 side and corona wires 9b, 10b contained in these shields 9a, 10a. The respective shields are so installed that fine gaps 9c, 10c are formed between the opening edges of the shields and the surface of the photoreceptor 1. On the other hand, the air flow contg. the ozone sucked into dust collecting housing 2a by fur brush rolls 3 is decomposed and filtered when it passes through an ozone filter 12 and only the air is released into the atmosphere.

Description

[Detailed Description of the Invention] This invention provides a COC/TR installed near the main body of the cleaner.
The present invention relates to a cleaning device for an electronic copying machine that has a function of discharging ozone that is frequently generated.

Generally, an electronic copying machine is provided with a corotron near the photoreceptor for electrically charging the photoreceptor, and when these corotrons discharge, ozone is generated. This ozone pollutes the environment, so in conventional electronic copying machines, geoscin is collected from inside the machine using an ozone exhaust fan, decomposed by an ozone filter, and then discharged outside the machine, but it accumulates near the photoreceptor. The high concentration of ozone is difficult to discharge, and this high concentration of ozone also has the problem of deteriorating the photoreceptor. Conventionally, the air volume of the ozone exhaust fan was increased to recover highly concentrated ozone, but as the air volume increased, power consumption and noise increased. Problems such as a decrease in ozone decomposition efficiency and a decrease in ozone decomposition efficiency were occurring.

This invention was made for the purpose of improving this problem, and the shield of the corotron located near the cleaner body and the housing of the cleaner body are connected in series, and the ozone generated by the protron is removed from the rotation of the fur brush roll. The present invention provides a cleaning device for an electronic copying machine in which ozone generated around a photoreceptor can be efficiently discharged by collecting it into a cleaner body using an air flow generated during the cleaning process and decomposing it with an ozone filter.

The following is a detailed description of the underworld side of the invention with reference to the drawings:
In the figure, 1 is a photoconductor of an electronic copying machine, and 2 is a cleaner body installed near the photoconductor 1. Inside the housing 2a of the cleaner body 2, there is a surface of the photoconductor 1 and a brush bristle. A pair of fur brush rolls 3 are rotatably provided so that their tips are in sliding contact. A roll housing 2b is provided on the circumferential surface of these fur brush rolls 3 so as to extend approximately halfway around the fur brush roll 3.

2c is provided with one each roll hacking 2b
, 2c is provided with an electric field curtain sheet 4 for preventing toner from adhering to the inner surface thereof.

Also, the photoreceptor 1 is rotated 30 times by each of the fur brush rolls mentioned above.
Any residual toner removed from the surface of the
The dust is knocked down into the dust collection housing 2a by the flin cover 5 provided so as to be in contact with the hot tip of the brush bristles 3 of the dust collection housing 2, and the plaque is transported to the Yuuger 71I by the scavenging roll 6 in the dust collection housing 2, where it is transported to the scraper. After the blade 8 scrapes off the circumferential surface of the scavenging roll 6, the screw auger 7 removes the dust from the dust collection housing 2.
a is carried outside.

On the other hand, a charging corotron 9 and a pre-cleaning corotron 10 are installed before and after the cleaner main body 2 (with respect to the rotating direction of the photoreceptor 1).

These gorotrons 9 and 1o have shields with a U-shaped cross section with openings facing the photoreceptor 1 side, and corona gears 9b, job, and other shields housed within these shields 9a, 10g, and shields 9a and 9a. .

For example, there is a distance of 1"11 between the opening edge of log and the surface of the photoreceptor 1.
11O thin full '? Shields 9m and 9b are installed close to the photoreceptor tX to form shields 9m and 9b. The shield 91 of the charging gorotron 9 of the above-mentioned seals) '9a and lOa is integrally connected to the roll housing 2b via the rack 11 section 2d that accommodates the static elimination light gi11 on the photoreceptor 1, and is connected to the roll housing 2b. Lincorotron 1
The entire shield 10 is integrally connected to the roll housing 2c. In addition, in the figure, it is an ozone filter provided in the upper opening of the 12Fi dust collection housing.

After the transfer process, the toner remaining on the surface of the photoconductor i is wiped off by the far plastic roll 3 of the cleaner main body 2, but as each of the seven arps 2 and the rollers 3 rotate, the toner remaining on the surface of the photoreceptor i is wiped off by the roll housing 2b.

2cl'lK generates an air flow in the direction of the scavenging roll 6. This air is sucked in through the narrow gaps 9c and IOc between the opening edge of the shield 9amIoa of each corotron 9.10 installed before and after the cleaner main body 2 and the surface of the photoreceptor 1, but the above-mentioned narrow FJ9c.

If foe is about 1 intestine, then from K, these slits are 9ct
The flow velocity of the air passing through the toe is much larger than the corona wind velocity, so that the ozone in the shields 9-910 can be prevented from leaking through the slits 9e and 1Oe. Incidentally, if the direction parallel to the axial center of the photoreceptor 1 of the gorotron 9.10 installed with respect to the photoreceptor IK as shown in FIG. As shown in Figure 3, the wind speed distribution of the corona ion wind emitted by the tron wire is such that the central part is the exhaust, and both ends are the intake. Therefore, if air intake is not performed, ozone will flow out from the photoreceptor 1 and the shield 9m, the gap 9e between foe, and IOc, and at the same time floating toner will be sucked in from both ends of the shield 9a and loa, and the corotron wire 9b and IOb may cause contamination. However, in the embodiment of the present invention, if the length of the fur brush roll 3 in the axial direction is, for example, 450 mm, and the interval between the slits 9c and IOc is Im, the flow velocity of the intake air flowing through the slits 9c and IOc is approximately A uniform value of about 17 tD/sec K is reached, and ozone leakage can be sufficiently prevented.

On the other hand, the ozone-containing air flow sucked into the dust collection housing 2 by the tour brush whirl 3 passes through the ozone filter 12 at the top of the dust collection housing 2, where the ozone is decomposed.
and only air is released into the atmosphere.

In the above embodiment, the air flow generated by the rotation of the fur brush roll 3 is used to suck and recover ozone, but it is of course possible to provide a separate small blower to suck the ozone.

As described in detail above, in this invention, the shield of the corotron installed near the cleaner body and the dust collection housing are connected to each other, and the ozone generated by the corotron is introduced into the cleaner body (through the gap between the shield and the photoreceptor). Since the ozone is inhaled and decomposed using an ozone filter, the high concentration of ozone around the photoreceptor can be removed without using a blower with a large air volume, reducing power consumption and noise. will be able to achieve this. Since floating toner sucked into the shield does not float around the corotron wire, it is possible to remove dirt from the inner surface of the shield inside the corotron wire.

[Brief explanation of the drawing]

The drawing is part of this invention! The J flow side is shown, and Figure 1 is a cross-sectional view.
FIG. 2 and FIG. 3 are explanatory diagrams showing the state of generation of corona ion wind. 1 is a photoreceptor, 2 is a cleaner body, 2b and 2c are housings, 3 is a fur brush roll, and qllo is a float 07.
9i, log is the shield, 9c, loe is the slit. Applicant Fuji Xerox Co., Ltd. Agent Patent Attorney Masaaki Yonehara Patent Attorney Tadashi Hamamoto

Claims (1)

[Claims] A part of the housings 2b and 2c of the cleaner main body 4, which has a fur brush roll 3 inside which contacts the surface of the photoreceptor 10 and removes untransferred toner remaining on the surface, and a part of the housing 2b, 2c installed near the cleaner main body 4. The shields 9a and IOa of the corotron 9.10 are airtightly connected, and the corotron 9.10 is installed so that the opening edge of the shield 9 and log is close to the surface of the photoreceptor 10 via the thin Fj9c and IOc. A cleaning device for electronic copying machines.