JPH02148061A - Charger device of image forming device - Google Patents

Abstract

PURPOSE:To effectively use a charge wire having sufficiently a service life at the time of use by moving the charge wire wound and hooked to two pieces of wire connecting members, based on a cleaning signal, and executing cleaning through a cleaning tool by following up the movement. CONSTITUTION:A charge wire 10 is drawn out of an opening part (d) of a cassette case 22 and wound and hooked to a pulley 11 of a base 7, and also, the wire 10 is inserted into a slit of a cleaning tool 21, and wire connecting members 23, 24 are detained and held by rotating bodies 4, 5 and the wire 10 is extended and provided. When the number of image formed pieces which are accumulated reaches a prescribed number, a motor M is brought to reciprocating rotation by a prescribed number, the charge wire 10 is brought to reciprocating movement and cleaned by the cleaning tool 21. When the number of times of cleaning which is accumulated reaches a prescribed number, the motor M rotates in the wire winding direction by a prescribed number, the charge wire 10 wound to the connecting member 23 is transferred out to a use position, and also, the charge wire 10 being in the use position hitherto is wound to the connecting member 24.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a charger device installed in an image forming apparatus such as an electrostatic photocopying machine or a facsimile machine.

[Conventional technology]

For example, an electrostatographic copying machine includes a charger device for charging the surface of the photoreceptor, a charger device for transferring the toner image formed on the surface of the photoreceptor to transfer paper, and a charger device for separating the transfer paper from the surface of the photoreceptor. It is equipped with a charger device and a charger device for static elimination.

If 1-ner or paper dust (=j) adheres to the charge wire of the charger device, it will cause a decrease in the amount of discharge or uneven discharge, which will cause the quality of the copied image to deteriorate. - As seen in Publication No. 85091, when toner etc. adhere to a charge wire and it becomes inappropriate to use the charge wire, the used charge wire is wound up and a new charge wire is used. I'm trying to get it to move out into position.

[Problem to be solved by the invention]

However, based on the fact that the 1st-ner etc. finished 1st on average, even though it still has a lifespan of 11 minutes in terms of performance, they concluded that the charge mano ear was unsuitable for use. It is very uneconomical to wind up and dispose of the charge wire.

The present invention was made in view of the actual situation, and
It is an object of the present invention to make effective use of the charge wire winding means that is considered inappropriate for use, and to make it possible to effectively use a charge wire that still has a sufficient lifespan.

[Means to solve the problem]

In order to achieve the above object, the present invention has two wire connecting members connecting charge wires, and a replacement charge wire portion of the charge wires is wound around at least one of the wire connecting members and held. In this state, a rotating member on the side of the charge case that can freely rotate in the forward and backward directions is engaged and held, and a cleaning device for cleaning the charge wire (T) is provided on the charge case, and a cleaning signal -υ Move the charge wire based on
a first control means and a predetermined number of charge wires'/f?
Uncovering the wire exchange signal sent after cleaning, the used charge wire is wound around the wire connection part 10A.
The present invention is characterized in that it is provided with a second control means that allows a replacement charge wire to be drawn out to a use position at the same time as the charge wire is moved.

[Effect]

According to the above characteristic configuration, the charge wire moves every time a cleaning signal is transmitted, thereby cleaning the charge wire portion to which toner or paper powder has adhered.

Then, when a wire exchange signal is issued from the second control means, the previously used charge wire section is wound up and a new charge wire section is fed out to the use position.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

Figures 1 and 2 show details of a charger device B equipped with a charge wire outlet A. In the figures, 1 is a metal charge case, and on both sides in the longitudinal direction are box-shaped boxes made of synthetic resin or the like. An insulating member 2.3 is attached to the bottom plate 2a of the insulating member 2 at one longitudinal end of the insulating member 2.3, and two rotating bodies 4 and 5 having locking ridges a are provided so as to be able to rotate forward and backward. ing.

A terminal 6 for voltage application is provided at the end of the other insulating member 3, and a conductive base 7 is provided inside to be slidable in the longitudinal direction. An electrically conductive coil spring 9 is provided across the sexual member 8 and the terminal 6 to bias the base 7 toward the terminal 6. Further, two conductive pulleys 11 for winding the charge wire 10 of the charge wire force separator LA, the details of which will be described later, are rotatably mounted on a conductive spindle 12 erected on the base 7. It is provided.

Reference numeral 13 denotes a height adjuster for the charge wire 10, in which a screw b penetrating through the bottom plate 2a of the insulating member 2 is screwed into a height adjustment plate 15 rotatably equipped with a pulley 14 for supporting the charge wire. At the same time, a spring 16 is provided between the height adjusting plate 15 and the bottom plate 2a to force the height adjusting plate 15 upward.

Reference numeral 17 denotes a drive means for rotating the rotating bodies 4 and 5 in the forward and reverse directions, and gears G, G2 are provided on each of the rotating bodies 4 and 5, and a member 18 connected to the insulating member 2 is configured to rotate the rotating bodies 4 and 5 in the forward and reverse directions. Take a freely adjustable motor M, and provide a war J1 gear G3 on the output shaft 19 of this forward/reverse motor M, and a wheel gear G4 that meshes with the wheel gear G3 and a gear G that meshes with the gear G2 of the rotating body 5.

16. is rotatably provided on a bracket 20 connected to the insulating member 2, and the rotating body 4
, 5, an intermediate gear G6 meshing with both gears Gl and G2 of the gears G1 and G2 is provided on the bracket 20 by a BJ.

Reference numeral 21 denotes a cleaning tool for cleaning the charge wire 10 as the charge wire 10 moves, and is formed by, for example, forming a slit in the felt portion A for inserting the wire.

Next, a specific example of the charge wire cassette A will be described. As shown in FIG. Across the face plate, the rotating body 1
.
Four wire guides l''e are provided in the vicinity of the opening d, and a charge wire 10 of a length sufficient for multiple wire replacements is placed around the two wire guides e. Both ends are connected to each of the wire connecting members 23 and 24, and the charging wire 10 is wound around one of the wire connecting members 23.

As shown in FIGS. 2 and 5, the case no. 1
- Pull out the charge wire IO from the opening d of the case 22 and wrap it around the pulley 11 of the base 7 i
At the same time, the charge wire 10 is connected to the cleaning tool 21.
The wire connecting members 23 and 24 held in the cassette case 22 are inserted into the slits of the rotating body 4 and the base 7 is slightly slid against the biasing force of the coil spring 9. 5, the charge wire 10 is tensioned with tension applied by the coil spring 9.

Here, the motor M includes a first control means 25 which inputs, for example, a cleaning signal based on a predetermined accumulated number of image formation sheets and rotates the motor M in forward and reverse directions by a predetermined number of rotations. , a second control means 26 for rotating the motor M by a predetermined number of rotations in the wire winding direction by inputting a wire exchange signal using, for example, a predetermined number of accumulated cleaning times as a control standard;
are electrically connected.

That is, when the accumulated number of images formed reaches a predetermined number and a cleaning signal is sent, the motor M reciprocates a predetermined number of times, and the charge wire 10 reciprocates accordingly. The charging wire 10 in the position is relatively cleaned by the cleaning tool 21.

Then, taking into account the lifespan of the charge wire 10, the number of cleanings of the charge wire 10 that can withstand use is calculated based on the lifespan, and when the accumulated number of cleanings reaches a predetermined number based on this, the wire is replaced. A signal is transmitted, and the motor M is rotated a predetermined number of times in the wire winding direction, and as the one wire connecting member 23 rotates, the charge wire 10 that is wound around the wire connecting member 23 is used. The charging wire 10, which has been in the use position, is wound around the wire connecting member 24 as the other wire connecting member 24 rotates.

It should be noted that a control means (this control means is referred to as a fifth control means in the present invention) 27 for transmitting a charge wire replacement signal based on a wire replacement signal transmitted when all of the charge wires 10 reach the end of their service life is provided. At the same time, the indicator lamp 28 is turned on by the input from the fifth control means 27, and the lighting of the lamp 28 is used to prompt the replacement of the charge wire 10.

Next, another embodiment of the charge wire cassette A is shown in FIGS. 6 to 8.

This charge wire cassette A is connected to the cassette case 22.
consists of two divisible case parts 22a and 22b connected by a small connecting part f, and the case part 22
a and 22b respectively house a wire connecting member 23 wound with the charge wire 10 and an empty wire connecting member 24, and the charger device B equipped with the charge wire cassette I-A is the first one. This is shown in FIGS. 9 and 10.

This charger device B includes a rotary body 5 rotatably provided on an insulating member 2 provided at one end of a metal charge case 1, which holds the empty wire connecting member 24 in a detachable position. , a rotating body 4 that removably locks and holds the wire connecting member 23 around which the charge wire IO is wound on the insulating part 133 of the other end of the charge case 1;
is rotatably provided, and a terminal 6 is provided at the end of the insulating member 3 at the other end, and a conductive wire wrapping member 8 is electrically connected to the terminal 6 via a coil spring 9. 11 so that it can be slid freely along the oblique oblong hole g.
1. The insulating member 3 is erected, and the insulating member 2, 3 is erected.
A cleaning tool 21 is provided on each of the rotating bodies 4 and 5, and a driving means 17 for driving and rotating the rotating bodies 4 and 5 is provided.

The driving means 17 described above is constructed as follows.

That is, gears G, .
9GIO is rotatably provided on the intermediate shaft 29.30 connected to each of the insulating members 2.3, and the gear G
A pulley 31 is integrally provided on each of G, an endless transmission device 32 is wound around the pulley 31, and an output shaft 19 of the forward/reverse motor M is provided with a gear Gl+ that meshes with the gear GIG. At the same time, first and second control means 2526 are electrically connected to the motor M.

Then, as shown in FIG. 8 and section 10, the cassette case 22 is divided into two pieces, and the empty wire connecting member 24 is connected to the rotating body 5! The wire connecting member 2 is held in a state where the conductive member 8 is slightly slid against the biasing force of the coil spring 9, and the wire connecting member 2 is
While unwinding the charge wire 10 from 3, the charge wire 10 is wound around the conductive member 8, and in this state, the wire connecting member 23 is retained and held by the rotating body 4, thereby reducing the tension by the coil spring 9. The charge wire 10 is stretched in a state where it is attached.

When the accumulated number of images formed reaches a predetermined number and a cleaning signal is sent, the motor M reciprocates a predetermined number of times, and the charge wire 10 reciprocates accordingly. Charge wire 10 in position
is relatively cleaned by the cleaning tool 28.

Further, when the cumulative number of cleanings reaches a predetermined number through repeated cleaning and a wire exchange signal is transmitted, the charge wire 10 wound around the wire connecting member 23 is unwound to the use position, and The charge wire 10 in the use position is wound around the wire connecting member 24.

In each of the above embodiments, the number of times the charge wire 10 can be cleaned to withstand use is determined based on the lifespan of the charge wire 10, and when the accumulated number of times of cleaning reaches a predetermined number based on this number, the wire is removed. A replacement signal is transmitted, and each time the cleaning signal is transmitted, the motor M is rotated a predetermined number of times in the wire winding direction.
While cleaning the charge wire 10, remove the charge wire A.
10 to the use position, and the wire connecting member 24 repeatedly winds up the charge wire 10 that has been in the use position until now, and the wire after the final winding of the charge wire IO Based on the exchange signal (that is, the cleaning signal), the cleaning and winding of the charge wire 10 is controlled in the reverse order (in the present invention, this control means is referred to as the third control means, (not shown) may also be used. That is, it is also a good idea to use the first control means 25 as the second control means 26 to repeatedly perform control in which the cleaning signal is immediately used as the wire replacement signal.

Alternatively, the charge wire 10 is once rewinded based on the wire exchange signal after the final winding of the charge wire 10, and then the control is performed to restart the repeated cleaning and winding of the biped charge wire 10. (In the present invention, this control means is referred to as a fourth control means, but it is not shown).

[1] The number of cleanings determined based on the life of the charge wire 10 described in I is divided into multiple parts, and the cleaning signal transmitted after reaching the number of divided cleanings is used as the wire exchange signal υ.
Based on this, it is also a good idea to take control of the following two aspects. In other words, if the number of cleanings determined based on the lifespan of the charge wire 10 is, for example, 6 times, this number is divided into, for example, 3 times, and the charge wire 10 is wound up. It is also possible to repeatedly perform the control in the two modes described in 1-2 above.

Further, in the embodiment, a cleaning signal is transmitted based on a predetermined cumulative number of times of image formation, and a wire replacement signal is transmitted based on a predetermined cumulative number of cleaning times. However, this is merely an example, and changes such as, for example, transmitting a cleaning signal and a wire replacement signal based on the cumulative number of rotations of the photosensitive drum are possible.

〔Effect of the invention〕

As explained above, the present invention is characterized in that the charge wire installed in the charger device of the image forming apparatus is repeatedly cleaned until the life of the charge wire is exhausted. Is it competent? By making it possible to use chargers repeatedly, which used to be discarded even though they still had a long lifespan, economical efficiency can be improved several times.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the LJ charger device, Fig. 2 is a longitudinal cross-sectional side view of the charger device showing the state before the charge wire is stretched, Fig. 3 is a perspective view of the charge wire cap, and Figs. 4 and 5 are the cassette FIG. 2 is a partial perspective view showing the opening of the I-case upside down. FIG. 6 is a perspective view of a charge wire connector according to another embodiment;
FIG. 7 is a schematic plan view, and FIG. 8 is a longitudinal side view. FIG. 9 is a plan view of a charger device according to another embodiment, and FIG. 1O is a longitudinal sectional side view of the charger device showing a state before the charge wire is stretched. 1...Charge case, 4, 5...Rotating body, 10...
・Charge wire, 21...Cleaning tool, 23.24...
Wire connection member, 25... first control means, 26...
Second control means, 27...Fifth control means.

Claims (4)

[Claims] (1) Two wire connecting members connecting charge wires can be rotated forward and backward on the charge case side while the replacement charge wire part of the charge wire is wrapped around at least one of the wire connecting members and held. A cleaning tool is provided in the charge case to lock and hold the charge wire on a rotating body and to clean the charge wire by moving the charge wire as the rotating body rotates, and moves the charge wire based on a cleaning signal. A charger device for an image forming apparatus, comprising a first control means and a second control means for winding up a charge wire at a use position and feeding out a replacement charge wire to a use position based on a wire exchange signal. (2) Third control means is provided for causing the first and second control means to perform cleaning and winding of the charge wire in a reverse procedure based on a wire exchange signal after the final winding of the charge wire. A charger device for an image forming apparatus according to claim (1). (3) A fourth method for temporarily rewinding the charge wire and restarting cleaning and winding of the charge wire by the first and second control means based on a wire exchange signal after the final winding of the charge wire.
A charger device for an image forming apparatus according to claim 1, further comprising a control means. (4) The charger device for an image forming apparatus according to claim 1, further comprising a fifth control means for transmitting a charge wire replacement signal based on a wire replacement signal after final winding of the charge wire.