JP2001159840A - Corona wire cleaning means for electrophotographic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corona wire cleaning member which does not influence the positional relation of a corona wire to a photoreceptor and is easily exchanged. SOLUTION: A thin plate type cleaning member capable of moving in a corona wire stretching and laying direction is provided as a member for cleaning the corona wire, and is made to be the corona wire cleaning means for an electrophotographic device, which cleans the corona wire with the edge part of the thin plate type cleaning member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corona wire cleaning means in a transfer unit or a charger of an electrophotographic apparatus.

[0002]

2. Description of the Related Art As a corona discharge device used in an electrophotographic apparatus, there is known a corona discharge device provided with a corona wire cleaning mechanism for the purpose of removing scattered toner, paper powder and the like adhering to a corona wire.

In order to stably remove dirt attached to the corona wire with time, it was necessary to periodically replace the corona wire cleaning member.

FIGS. 5A and 5B show an example of a conventional corona wire cleaning mechanism.

At the time of the cleaning operation, the cleaning members 6 and 7 move in the corona wire stretching direction while holding the corona wire 8 therebetween to clean the corona wire surface. Since the cleaning operation is performed by sandwiching the corona wire from above and below, the cleaning member 6, as shown in FIG. 5 (b), does not affect the predetermined position of the corona wire 8 except during the cleaning operation.
7 has a structure separated from the corona wire 8. Since the corona wire 8 is sandwiched from above and below, it is difficult to replace the corona wire and the corona wire cleaning member.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure in which a corona wire cleaning member does not affect a predetermined position of a corona wire except during a cleaning operation, and a corona wire and a corona wire cleaning member. It is an object of the present invention to provide a corona wire cleaning member that can easily replace the corona wire.

[0007]

The object of the present invention is to provide a corona wire cleaning member having two notches parallel to a line connecting the center of the corona wire and the center of the photoreceptor, attached to both sides of the holding member. A corona wire cleaning member for moving the corona wire cleaning member in the corona wire stretching direction and a cleaning member moving member having a detachable structure do not affect a predetermined position of the corona wire. In addition, a corona wire cleaning member that can be easily replaced can be provided.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described with reference to FIG.

FIG. 1 shows details of the corona wire cleaning member 1. The corona wire cleaning means 1 is composed of a cleaning member 2 using thin high-molecular-weight fibers such as aramid fibers processed into paper, and a holding member 3 for holding the cleaning member 2. The holding member 3 is attached to the cleaning member moving member 4, and moves in the direction in which the corona wire 5 is stretched by reciprocating the cleaning member moving member 4 in the arrow direction. The corona wire 5 is stretched in the longitudinal direction through the slit portion of the cleaning member 2 of the corona wire cleaning means 1 and the groove of the holding member 3, and causes the cleaning member moving mechanism 4 to reciprocate in the stretching direction of the corona wire 5. Thus, the toner, paper dust, and the like, which are sandwiched between the cut portions of the cleaning member attached to both sides of the holding member 3 and rubbed and adhered to the surface, are removed.

In FIG. 2, the cleaning member 2 has two cuts, and the dimension A is the same as the predetermined interval between the two corona wires. In FIG. 3 (a), the holding member 3 is dug on both sides as a guide for abutment when the holding member 3 is attached to the cleaning member 2, and the dug position is shifted by B dimension. The cleaning member 2 is mounted so as to abut the above-described dug portion and sandwich the holding member 3. However, since the dug position is shifted by the B dimension, the cut of the cleaning member 2 is also shifted by the B dimension (FIG. 3 (b)). )reference). 4A, when the corona wire cleaning member 1 is attached to the corona wire 5 at a predetermined position, the corona wire cleaning member 1 is inclined at a predetermined angle with respect to the corona wire 5 so that two cleaning members are provided. The corona wire 5 can be attached and detached without touching the notch 2 and the groove of the holding member 3. afterwards,
By rotating the corona wire cleaning means 1 so that the corona wire cleaning means 1 is perpendicular to the corona wire 5, the corona wire 5 comes into contact with the cut edge 9 of the cleaning member 2 (FIG. 4 (b) )reference). In this state, the corona wire cleaning means 1 is fixed to the cleaning member moving member 4 and reciprocated in the direction in which the corona wire 5 is stretched, so that the toner adhered to the surface of the corona wire 5 at the edge 9 of the corona wire cleaning means 1. , Paper dust and the like can be removed. Further, since the cut of the cleaning member is parallel to a line connecting the center of the corona wire and the center of the photoconductor, it does not affect the positional relationship of the corona wire 5 with respect to the photoconductor. The replacement work of the corona wire cleaning means 1 can be easily performed in a reverse procedure of the mounting work.

[0011]

According to the present invention, it is possible to provide a corona wire cleaning mechanism which has a simple structure and does not affect the predetermined position of the corona wire and can be easily replaced.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a shape of a corona wire cleaning member according to an embodiment of the present invention.

FIG. 2 is a schematic view of a cleaning member of the present invention.

FIG. 3 is a schematic view illustrating the shape of a holding member of the corona wire cleaning member of the present invention and a description at the time of attaching the cleaning member.

FIG. 4 is a schematic diagram illustrating a method of attaching a corona wire cleaning member of the present invention.

FIG. 5 is a schematic diagram illustrating a method of attaching a conventional corona wire cleaning mechanism.

[Explanation of symbols]

1: Corona wire cleaning member, 2: Cleaning member, 3: Holding member, 4: Cleaning member moving member, 5: Corona wire, 9: Edge portion.

Claims (2)

[Claims] 1. An electrophotographic apparatus having a corona wire, wherein a thin plate-shaped cleaning member is provided for cleaning the corona wire.
A corona wire cleaning means for an electrophotographic apparatus, wherein cleaning is performed at an edge portion of the thin cleaning member. 2. A holding member which is movable in a direction in which the corona wire is stretched, an edge portion is provided on a plurality of thin plate-like cleaning members, and the plurality of thin plate-like cleaning members are spaced from each other. 2. The corona wire is displaced in the vertical direction of the corona wire stretcher, disposed on the holding member, the corona wire is passed through the cleaning member in contact with the edge portion, and the corona wire is cleaned at the edge portion. A corona wire cleaning means for the electrophotographic apparatus according to the above.