JPS60168182A - Image carrier cleaning device - Google Patents

Abstract

PURPOSE:To obtain invariably stable copy quality without attracting toner to a brush body made of insulating fibers by using the brush body as a cleaning assistant member. CONSTITUTION:A blade body 4 and the brush body 5a are stored and arranged in the housing 6 of a cleaning device body as well as a conventional device. A brush body of 32mm.phi size formed by implanting rayon fibers of 25muphi in a roll body to 100mm. fiber length and 70,000/cm<2> density is used as the brush body 5a and this is arranged in contact with an Se drum to about 1mm. contact length. This cleaning device is used to prevent toner from lumping by sticking on the brush body 5a excessively, from overflowing, or from forming clouds. Thus, remaining toner on the image carrier is crushed with the insulating brush body and then the image carrier is cleaned easily with the cleaner body.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cleaning device for an electronic copying machine, and more particularly to a cleaning device for removing and recovering residual toner from an image bearing member.

, Prior Art Conventionally, various devices are known as cleaning devices for residual toner on image carriers such as electrophotographic photoreceptors.
For example, a leaning device as shown in FIG. 1 is used. In FIG. 1, 1 is an electrostatic latent image carrier, and 2 is powder toner that remains on the electrostatic latent image carrier 1 after the transfer process.

The cleaning device body 3 is disposed in close proximity to the position facing the electrostatic latent image carrier 1, and has a blade body as a cleaner body for reliably removing and collecting the toner 2 from the electrostatic latent image carrier 1. 4 and a brush body 5 as a cleaning auxiliary member, both of which are housed and arranged within the housing 6. Moreover, the brush body 5 is
It is located on the front side (lower side) of the blade body 40 and is composed of conductive fibers, and a voltage is applied to the conductive fibers by a bias power supply 8 via a metal plate 7 that comes into contact with the conductive fibers. There is.

The operation of this leaning device will be described below.

The toner 2 remaining on the electrostatic latent image carrier 1 after the transfer process is neutralized by the brush body 5 which is biased in polarity, some percentage of it is absorbed by the brush body 5, and the rest is absorbed by the cleaner body The toner is cleaned by the blade body 4, and the toner scraped off by the blade body 4 falls directly above the brush body 5, and is further conveyed by the brush body 5 and collected on a catch pan (not shown).

What is important here is that the brush body 5 neutralizes the electric charge of the residual toner so that the residual toner on the electrostatic latent image bearing member 1 can be completely cleaned by the blade body 4, which is a cleaner body. It is necessary to adsorb a certain percentage of the toner.

In order to provide such a function to the brush body 5, conductive fibers with an electrical property of 10' to 1011 Ωα are used, and conductive fibers are coated on the surface of the roll body at a density of 1,000 to 300,000 fibers/-. Planted, fiber length is 1-10mm
It is composed of

However, in such a conventional device, when the adsorption of toner on the brush body 5 reaches saturation, toner overflows from the brush body 5, which significantly reduces the copy quality, and also causes toner clouding due to contact with the metal plate 7. There are problems in that a large amount of dust is generated, contaminating not only the inside of the cleaning device but also the entire inside of the copying machine, and furthermore, the entire brush body 5 is deformed into a dumpling-shaped roll, and there is a strong need to solve this problem. there were.

OBJECTS OF THE INVENTION Therefore, an object of the present invention is to
The purpose of the present invention is to eliminate and improve the problems of the printing device, and to prevent toner from overflowing from the brush body, thereby preventing a significant deterioration in copy quality caused by the toner overflow, and to prevent the brush body from forming a dumpling-like shape. To provide an image carrier cleaning device capable of preventing the occurrence of toner cloud, keeping the inside of a copying machine clean by suppressing the generation of toner cloud, and obtaining stable copy quality.

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a cleaning device for removing and collecting toner remaining on an image bearing member, which comprises a cleaner main body and a cleaning auxiliary member. This is characterized by the use of a brush body made of insulating fibers.

Aspects of the Invention As the insulating fibers constituting the brush body, Teflon, nylon, rayon, polypropylene, acrylic fibers, etc. can be suitably used.

In the present invention, instead of applying a voltage from a bias power source to the brush body and neutralizing the electric charge of the residual toner as in conventional devices, the present invention uses an insulating brush body to remove the residual toner on the image carrier. This makes it easier to scrape it up and then clean it with the cleaner itself.

For this reason, the above-mentioned insulating fibers having a fiber thickness of 5 to 50 μm are placed in the roll body, and the fiber length is 3 to 15 mm.
A brush body is formed by implanting the brush body so that the density is 1, OOo~400.000, brush/d, and the contact length with the image carrier is increased to increase the depth of penetration or burial depth of the image carrier into the brush body. ) It is preferable to arrange them so that they are in contact with each other so as to have a distance of 0.2 to 2 degrees.

EXAMPLES Hereinafter, the present invention will be described in detail while explaining examples shown in the accompanying drawings. For convenience of explanation, the same reference numerals are used for members having the same functions as those of the conventional cleaning device shown in FIG. 1, and detailed explanation will be omitted.

Embodiment 1 FIG. 2 shows an embodiment of a blade type cleaning device similar to the conventional device shown in FIG. 1. In FIG. 2, 1 is an electrostatic latent image carrier, 4 is a blade body, and 5a is a brush body, and the blade body 4 and brush body 5a are housed in the housing 6 of the cleaning device main body 3 as in the conventional device. , and the manner of arrangement thereof is the same as that of the conventional device.However, in this embodiment, unlike the conventional device shown in FIG. No metal plate is provided.

In the leaning device as shown in FIG. 2 above, a Se-based drum is used as the electrostatic latent image-bearing potting soil, and as the brush body 5a, rayon fibers of 25 μφ are placed on the roll body with a fiber length of 10 and a density of 70.000. A brush body with a size of 32 threshold φ was implanted so as to have a diameter of 1/d, and was placed in contact with the Se-based drum so that the contact length was about 1 wn. Using a leaning device like this, make a copy.
Although 0.000 sheets were collected, no excessive toner adhered to the brush body 5a resulting in a dumpling shape, no toner overflow, and no toner cloud.

Example 2 FIG. 3 shows a modification of the first embodiment.

This embodiment is the same as the first embodiment except that the wiping blade 9 is disposed in contact with the brush body 5a.

This wiping blade 9 has the role of wiping off toner adhering to the brush body 5a, and keeps the function of the blade body 5a constant at all times.

Although some toner cloud is generated in this embodiment, since the insulating brush body 5a is used and no bias voltage is applied, the amount of toner adhering to the brush body 5a is small compared to the conventional device. , and it has almost no effect.

Embodiment 3 FIG. 4 shows an example of a magnetic bluff cleaning device that uses a Se-based drum as the electrostatic latent image carrier and uses a one-component magnetic toner as the toner used for development.

In Fig. 4, 1 is an electrostatic latent image carrier (Se-based drum)
2a is a one-component magnetic toner containing a magnetic material inside the powder toner, which remains on the electrostatic latent image carrier 1 after the transfer process.

The cleaning device main body 3a is disposed close to a position facing the electrostatic latent image carrier 1, and has a magnetic brush cleaner 10 disposed close to the electrostatic latent image carrier 1 therein as a cleaning auxiliary member. It is composed of a brush body (brush roll) 5a. The magnetic brush cleaner 10 is for magnetically adsorbing the -component magnetic toner 2a, and includes a non-magnetic sleeve 11 which is rotatably fixed, and a plurality of non-magnetic sleeves fixed to the inside thereof so as not to rotate. It consists of a magnet 12 formed in the shape of a roll made of magnetic poles.

The sleeve 11 can be rotated in the same direction as the moving direction of the electrostatic latent image carrier 1, and the rotation speed of the sleeve 110 can be synchronized with the rotation speed of the electrostatic latent image carrier 1. It is also possible to adjust the speed. Further, the sleeve 11 is electrically grounded. Further, a non-magnetic (made of aluminum) regulating blade 13 is provided at a predetermined position close to the sleeve 11 to regulate the amount of one-component magnetic toner on the sleeve 11.
It is fixed to a. On the other hand, the brush body 5a is made of insulating fibers as in each of the embodiments described above.

Here, to explain the operation of the cleaning device, the one-component magnetic toner 2a remaining on the electrostatic latent image carrier 1 after the transfer process is broken up by the brush body 5a.
A magnetic brush cleaner 10 is sent to a cleaning area facing the electrostatic latent image carrier 1. In the cleaning area, the one-component magnetic toner adsorbed on the blood of the sleeve 11 of the magnetic brush cleaner 10 is magnetically cleaned while rubbing the toner remaining on the electrostatic latent image carrier 1.

In the magnetic brush cleaning device configured as described above, the brush body 5a is made of Veslon (trade name), which is an acrylic fiber with a thickness of 25 μm, with a fiber length of 7-1 and a density of 200 μm.
．． 2 planted in the roll body so that 000 pieces/Ca
A brush body having a size of 8WII+Iφ was used and placed in contact with the Se-based drum so that the contact length was about 1 inch.

Approximately 100,000 copies were collected under these conditions, but the brush body 5a did not become dumpling-shaped, toner overflowed, or toner clouds did not occur.

In the above embodiments, a blade body and a magroll body were shown as examples of the cleaner body, but other cleaning means such as a fur brush body may also be used.

Effects of the Invention As described above, the image carrier cleaning device according to the present invention uses a bluff body made of insulating fiber as a cleaning auxiliary member, and a brush body made of conductive fiber like the conventional bag fi. Because it does not apply a bias voltage or bring a metal plate into contact with the brush body for this purpose,
The brush body does not absorb toner, and therefore the brush body does not become lumpy, overflow with toner, or create toner clouds that seriously stain copies. Therefore, stable copy quality can always be obtained and a highly reliable copying machine can be obtained.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram of a conventional cleaning device, FIG. 2 is a schematic explanatory diagram showing an embodiment of the cleaning device according to the present invention, and FIG. 3 is a schematic diagram showing a modification of the embodiment shown in FIG. 2. The explanatory diagram, FIG. 4, is a schematic explanatory diagram of another embodiment. 1... Electrostatic latent image carrier, 4... Blade body, 5...
- Conductive brush body, 5a... Insulating brush body, 9...
・Wiping blade, 10...Magnetic brush cleaner, 1
1...Sleeve, 12...Magnet, 13...
regulation blade. Applicant Fuji Xerox Co., Ltd. Agent Patent Attorney Masaaki Yonehara Patent Attorney Tadashi Hamamoto Figure 1 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. A cleaning device for removing and collecting toner remaining on an image bearing member, which comprises a cleaner main body and a cleaning auxiliary member, wherein the cleaning auxiliary member is a brush body made of insulating fibers. An image carrier cleaning device characterized by using: 2. As the brush body, Teflon, nylon, rayon,
The image carrier cleaning device according to claim 1, which uses a brush body made of polypropylene or acrylic fiber. 8. The brush body has a fiber length of 3 to 15 mm and a thickness of 5 to 50 μm.
, the brush body has a density of 1000 to 400,000 lines/d and a size of 10 to 50 φ, and the brush body is disposed in contact with the image carrier with a fiber contact length of 0.2 to 2 cm. An image carrier cleaning device according to claim 1 or 2.