JPH06102741A - Electrifying wire cleaning device - Google Patents

Abstract

PURPOSE:To provide en electrifying wire cleaning device capable of always sufficiently fulfilling a cleaning effect by abutting a cleaning member on the surface side of an electrifying wire opposite to a photosensitive body. CONSTITUTION:In the electrifying wire cleaning device 1 used for an electrifier 40 arranged along the outer periphery of the photosensitive body having electrostatic chargeability and imparting an electrostatic charge onto the outer periphery of the photosensitive body by the electrifying wires 7a and (7b), the cleaning member 11 abutted on the surface sides of the electrifying wires 7a and (7b) opposite to the photosensitive body and a driving means 12 driving the cleaning member 11 over the entire lengths of the electrifying wires 7a and (7b) are provided. In this constitution, a material such as toner stuck to the surfaces of the electrifying wires 7a and (7b) opposite to the photosensitive body is surely removed and the cleaning effect can be always fulfilled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging wire cleaning device, and more particularly to a charging wire cleaning device suitable for application to a charging device in an electrophotographic copying machine or the like.

[0002]

2. Description of the Related Art In a charging device 50 used in an electrophotographic copying machine or the like, as shown in FIG. 7, a charging wire 51 disposed along the axial direction on the outer periphery of a photoconductor 52 having a charging property is high. A voltage is applied to apply a charge to the outer periphery of the photoconductor 52.

Then, in order to clean the toner (developer) adhering to the charging wire 51 and the silicon oil evaporated from a fixing device (not shown), a pair of cleaning pads 54a, 54 contacting both side surfaces of the charging wire 51.
A charging wire cleaning device 53 having b is added.

[0004]

However, in the case of the above-described charging wire cleaning device 53, the cleaning pads 54a and 54b are in contact with both side surfaces of the charging wire 51, as shown in an enlarged view in FIG. For,
Due to poor contact or damage of the cleaning pads 54a and 54b, the cleaning of toner and the like on the surface of the charging wire 51 on the side of the photoconductor 52 becomes insufficient, and as a result, the charge of the charge on the photoconductor 52 by the charging wire 51 is reduced. There is a problem that application becomes uneven or insufficient.

Therefore, it is an object of the present invention to provide a charging wire cleaning device having an improved structure and capable of always exerting a sufficient cleaning effect on a charging wire.

[0006]

According to the present invention, a charging wire used in a charging device which is disposed along the outer periphery of a photoconductor having a charging property and which applies a charging charge to the outer periphery of the photoconductor by a charging wire is cleaned. In the charging wire cleaning device described above, a cleaning member that abuts the surface of the charging wire facing the photoconductor and a driving unit that drives the cleaning member over the entire length of the charging wire are provided.

The cleaning member is configured to contact a plurality of charging wires arranged along the outer periphery of the photoconductor on the side of the surface facing the photoconductor.

[0008]

The operation of the charging wire cleaning device having the above-mentioned structure will be described below.

The cleaning member of the charging wire cleaning device is driven by the driving means and abuts on the surface of the charging wire facing the photoconductor to clean the charging wire over its entire length.

As a result, the adhering substances such as the toner adhering to the surface of the charging wire facing the photosensitive member are surely removed, and the cleaning effect can always be sufficiently exerted.

The cleaning member has a structure in which a plurality of charging wires arranged along the outer periphery of the photosensitive member are in contact with the surface of the charging member facing the photosensitive member, whereby the plurality of charging wires can be cleaned at once.

[0012]

EXAMPLES Examples of the present invention will be described in detail below.

1 to 4 show a charging device 40 including a charging wire cleaning device 1 of this embodiment.

The charging device 40 includes a main body 2 having a U-shaped cross section, which is arranged along the axial direction on the outer periphery of a photoconductor 52 having a charging property.

The bottom surface 2a of the body 2 is attached to one end of the body 2.
The hooking shaft 3 arranged in a state of being floated from above is provided.
At the other end of the main body 2, a pair of fixed columns 4 and 5 is provided upright at a position facing the latch shaft 3.

A pair of rings 6 hung on the latch shaft 3
By connecting one ends of the charging wires 7a and 7b to a and 6b, respectively, and connecting the other ends of the charging wires 7a and 7b to the pair of springs 8a and 8b attached to the fixed columns 4 and 5, respectively, The wires 7a and 7b are stretched in a state of being floated from the bottom surface 2a of the main body 2 with a predetermined tension.

The charging wire cleaning device 1 includes a cleaning member 11 that abuts the surface of the charging wires 7a and 7b facing the photoconductor 52, and the cleaning member 11.
Drive means 12 for driving the charging wires 7a, 7b over the entire length thereof.

The cleaning member 11 is the main body 2
The sliding body 13 that slides on the bottom surface 2a of the
Shaft 14 provided in a direction orthogonal to the length direction of the main body 2 of
The rotating body 15 attached so as to be rotatable in the α and β directions with respect to
And a projecting piece 16 provided so as to project from the rotary body 15 to the bottom surface 2a side of the main body 2, and a further protruding outward through the main body 2 on the surface side of the sliding body 13 opposite to the rotary body 15. And a protrusion 17 connected to a toothed belt 24 described later.

As shown in FIG. 2, the rotating body 15 has
A first cleaning pad 15a that contacts the surface of the charging wires 7a and 7b on the side of the photoconductor 52 and a second cleaning pad 15b that faces the first cleaning pad 15a are arranged in the moving direction of the cleaning member 11. Are provided in a front-rear arrangement with the shaft 13 interposed therebetween.

As shown in FIGS. 2 and 3, the driving means 12 includes a toothed pulley 18 and a driven gear 19 arranged near the initial position of the cleaning member 11 shown in FIG. 2 on the rear surface 2b side of the main body 2. The drive unit 20 provided, the drive motor (stepping motor) 21, the driving gear 22, the toothed pulley 23 provided in the vicinity of the latch shaft 3, the toothed pulley 18, and the teeth that are wound around the toothed pulley 23. The toothed belt 24, a positioning piece 25 connected to the toothed belt 24 at a position where the entire length of the toothed belt 24 is divided into two equal parts together with the toothed belt 24;
7. First and second detection switches (microswitches) 26 arranged so as to face the respective movement areas of the positioning piece 25,
And 27.

In the state shown in FIG. 2 in which the cleaning member 11 is in the initial position, the edge of the bottom surface 2a of the main body 2 is cut out to form a recess 28 into which the projecting piece 16 falls.

FIG. 6 shows a control system of the charging wire cleaning device 1, which is a CPU for controlling the whole.
The first and second detection switches 26 and 27 are connected to 31 and a motor driver 32 for driving the drive motor 21 is connected.

Next, the charging wire cleaning device 1
The operation of will be described with reference to FIG.

When the charging wire cleaning device 1 is retracted to the initial position shown in FIG. 2, the protruding piece 16 of the cleaning member 11 falls into the recess 28, so that the rotating body 15 rotates in the β direction shown in FIG. As a result, the first and second cleaning pads 15a and 15b are separated from the charging wires 7a and 7b, respectively.

In this state, when the drive motor 21 is started and the toothed belt 24 is moved in the direction a shown in FIG. 3,
The cleaning member 11 also moves in the a direction, and the protruding piece 16 leaves the recess 28 and abuts the bottom surface 2a. As a result, the rotating body 15 rotates in the α direction as shown in FIG. 5, and the first and second cleaning pads 15a and 15b face the surface of the charging wires 7a and 7b facing the photosensitive body 52 and the main body. The bottom 2a side of 2 is wrapped.

In this state, the cleaning member 11 is a
Moving in the direction, the charging wires 7a and 7b are cleaned over the entire length. When the protrusion 17 of the cleaning member 11 comes into contact with the first detection switch 26, the drive motor 21 is driven by the detection signal of the first detection switch 26.
Is reversed, and this time the cleaning member 11 is driven in the b direction. As a result, the first and second cleaning pads 1
The cleaning member 11 returns to the initial position while the surfaces 5a and 15b of the charging wires 7a and 7b facing the photoconductor 52 and the bottom surface 2a of the main body 2 are returned to the initial position, and the projecting piece 16 falls into the recess 28. , The second cleaning pads 15a and 15b are separated from the charging wires 7a and 7b, respectively. At this time, the positioning piece 25 is
Since it comes into contact with the detection switch 27, the drive motor 21 also stops.

By such an operation, the adhered matters such as the toner adhered to the surfaces of the two charging wires 7a and 7b facing the photoconductor 52 can be removed all at once, and the cleaning effect can be obtained. Can be fully exerted at all times.

The present invention is not limited to the above-described embodiments, but various modifications can be made within the scope of the invention.

[0029]

According to the present invention described in detail above, since it has the above-mentioned structure, the adhered substances such as toner adhered to the surface of the charging wire facing the photosensitive member can be surely removed.
It is possible to provide a charging wire cleaning device that can always exert a sufficient cleaning effect.

Further, the cleaning member is configured to contact a plurality of charging wires arranged along the outer periphery of the photoconductor on the side of the surface facing the photoconductor, thereby cleaning the plurality of charging wires at once. A charging wire cleaning device capable of being provided can be provided.

[Brief description of drawings]

FIG. 1 is a partially omitted bottom view of a charging device including an apparatus according to an embodiment of the present invention.

FIG. 2 is a side view of a charging device including a charging device according to an embodiment of the present invention, with some parts omitted;

FIG. 3 is a partially omitted rear view of a charging device including a device according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing an arrangement of a charging device including an apparatus according to an embodiment of the present invention.

FIG. 5 is an operation explanatory view of the apparatus according to the embodiment of the present invention.

FIG. 6 is a block diagram showing a control system of an apparatus according to an embodiment of the present invention.

FIG. 7 is a sectional view showing the arrangement of a conventional device.

FIG. 8 is a partially enlarged view of a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Charging wire cleaning device 2 Main body 7a, 7b Charging wire 11 Cleaning member 12 Driving means 40 Charging device

Claims (2)

[Claims] 1. A charging wire cleaning device for cleaning a charging wire, which is disposed along the outer periphery of a photoconductor having a charging property and is used in a charging device for applying a charge to the outer periphery of the photoconductor by a charging wire, A charging wire cleaning apparatus comprising: a cleaning member that abuts a surface of the charging wire facing the photoconductor; and a driving unit that drives the cleaning member over the entire length of the charging wire. 2. The charging wire cleaning device according to claim 1, wherein the cleaning member is in contact with a surface of a plurality of charging wires arranged along the outer periphery of the photoconductor, the surface facing the photoconductor.