JPS6015670A - Cleaning device of copying machine - Google Patents

Abstract

PURPOSE:To make the power source of an electric field curtain sheet small-sized to make a device itself small-sized by providing grounded conductive fibers in a part of insulating fibers constituting the brush part of a fur brush. CONSTITUTION:In the fur brush 5 arranged on the outside circumference of a photosensitive body 6, an insulating fibrous brush 5b consisting of ''Teflon'' or the like is flocked on the outside circumference of an Al tube 5a, and a conductive fibrous brush 5c is flocked instead of a part of the brush 5b, and the width of this brush 5c on the circumference is about 2mm., and the brush 5c is grounded through the Al tube 5a. The outside diameter of the brush 5 is about 80<phi>, and its number of revolution is about 500rpm. An electric field curtain sheet 8 is arranged on the inside wall of a housing 7 around the brush 5. With respect to the sheet 8, an electrode 8a consisting of copper or the like is buried in ''Myler'' sheet or the like, the interval of the electrode 8a is about 3mm., and the sheet is connected to the power source 9.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a fur brush cleaning device for a copying machine.

(Prior Art) Conventionally, there have been various types of toner cleaning devices for copying machines, such as a blade type, a magnetic brush type, a 7-ohm roll type, a web type, and a fur brush type. Among them, the fur brush method combined with a cyclone filter maintained a high level of cleaning performance. This is because the structure was configured so that the residual toner adhering to the surface of the photoreceptor was swept away with a fur brush to form a cloud, and the toner in the cloud was removed by pulling it to zero using the suction force of the blower. A large capacity processor
Although a motor was required, this motor had the drawbacks of high power consumption and high noise. Therefore, in order to avoid this drawback, models with smaller blower motors and lower power consumption and noise have been devised, but these have the disadvantage of lower air volume than conventional ones. If the toner falls, the toner will accumulate on the inner wall of the cleaner, so conventionally, the first flat step was used to prevent this.
As shown in the figure, a three-phase electric field 1-ten sheet 3 was provided between the fur brush 1 and the welding 2, and the sheets 3 were dotted throughout the sheet 3! Li group 4... has three-phase AC high voltage U.
, V, and W phases are applied to vibrate the toner by the force of the electric current, and the toner is scattered and conveyed in the same direction as the rotational direction of the brush 1. However, this device requires a three-phase, high-voltage power in order to achieve its intended purpose, so the disadvantage is that the power supply becomes large, and this large power supply means that the copying machine can be made smaller. This was one of the causes that hindered efforts to achieve this goal.

(Object of the Invention) The present invention has been made to eliminate the drawbacks of the conventional copying machine cleaning device described above, and by reducing the power supply, it is possible to keep pace with the miniaturization of copying machines. It is an object of the present invention to provide a cleaning device that has a toner cleaning performance that is as good as that of conventional cleaning devices of this type.

(Structure of the Invention) For this purpose, the present invention aims to downsize the power supply by making the power supply itself single-phase and lowering the voltage, and also simplifies the electrode configuration of the electric field curtain sheet. By using conductive fibers, toner is efficiently transferred toward a suction duct located at the end of the cleaner housing.

(Example) The present invention will be described in detail below based on an example shown in the drawings.

FIG. 2 is a schematic configuration diagram showing one embodiment of the cleaning device of the present invention. In the figure, 5 is a fur brush placed around a part (circumference) of the photoreceptor 6. This fur brush 5 is attached to an aluminum pipe 5a. An insulating fiber brush 5b such as Teflon is implanted on the outer periphery, and a conductive fiber brush 5C such as 5A7 (trade name) is implanted in a part of the insulating fiber brush 5b. The width is about 2 mm on the circumference, and the conductive fiber brush 5C is grounded via the aluminum pipe 5a.The outer diameter of the fur brush 5 is about 80φ.
The rotation speed is about 500 rpm. On the other hand, 7 in the figure is a housing disposed around the outer periphery of the fur brush 5, and an electric field curtain sheet 8 is disposed on the inner wall of the housing 7. This electric field curtain sheet 8 is made of a Mylar sheet or the like with electrodes 8a made of copper or the like embedded therein.
...The distance between them should be about 3■. Also, this electrode 8a・
... is connected to power supply 9. This connection is a single-phase connection, and the applied voltage from the power supply 9 is approximately 4KV AC (50TT
Z). Further, the distance between the outer peripheral tip of the fur brush 5 and the electric field curtain sheet 8 is set to about 2-.

In addition, 10 in the figure is a suction duct arranged at the end portion of the housing T.

The present invention is constructed as described above. Next, its operation will be explained.

Toner remaining on the photoreceptor 6 and entering the cleaner is swept off from the photoreceptor 6 by the fur brush 5 and becomes cloud-like. Most of the toner is moved and collected by the airflow caused by the rotation of the brush 5 and the suction force of the suction duct 10.
Some toner will try to stick to the inner walls of the cleaner.

This toner is vibrated and scattered by a single-phase electric field curtain sheet 8 and moved in the same direction as the rotating direction of the brush 50. As shown in FIG.
A line of electric force is generated between the tip of the conductive fiber brush 5C and the ungrounded electrode 8a of the electric field curtain sheet 8, and the line of electric force moves in the same direction as the rotating direction of the brush 5. , the toner is moved along with the movement of the electric lines of force.

(Effects of the Invention) The present invention is configured and used as described above. By providing a part of the fur brush 5 with the conductive fiber brush 5C, the electric field curtain sheet 8 is made into a single phase. 8 is single phase, the electrode 8a of the sheet 8 itself...
In addition to simplifying the configuration, it is also possible to downsize the power supply 9 itself by making it single-phase and lowering the voltage. The device can match this, and when toner is transported, it is carried out using the single-phase electric field curtain sheet 8 and the fur brush 5 partially provided with the conductive fiber brush 5c. It also has the effect of improving conveyance efficiency.

[Brief explanation of drawings]

Fig. 1 is a schematic cross-sectional view of a fur brush type cleaning device using a conventional electric field sheet, Fig. 2 is a schematic cross-sectional view showing a simple example of the cleaning device of the present ministry 1, and Fig. 3 is a schematic cross-sectional view of a fur brush type cleaning device using a conventional electric field sheet. FIG. 3 is a schematic diagram of electric lines of force generated between the electric field curtain sheet and the electric field curtain sheet. In the figure, 5...fur brush, 5&...aluminum pipe, 5b...-insulating fiber brush, 5C...conductive fiber brush, 6...photoreceptor, T... -Housing, 8...e electric field curtain sheet, 8a...electrode, 9.@--power supply, 1θ...suction duct. Fuji Xerox Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A cleaning device combining an electric field curtain sheet and a fur brush, characterized in that a part of the insulating fibers constituting the brush portion of the fur brush is provided with conductive fibers, and the conductive fibers are grounded. Machine cleaning equipment.