JP2003084630A - Image forming device, and method for controlling image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming device capable of reducing superfuous image omission and image deterioration by performing appropriate cleaning operation by a cleaning mechanism in addition to a control method for making the cleaning mechanism act when a main power source is turned on or after completing copying by the specified number of copies based on a maintenance cycle, which is ordinarily performed in the image forming device using retrying control. SOLUTION: This image forming device is characterized in that the cleaning mechanism of an image forming system unit is made to act at the time of finishing a job judged as the one causing an abnormal discharge when a situation does not result in the stop of the image forming device due to an abnormal trouble because the number of retrying times by the retrying control is equal to or under a specified value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as an electrophotographic copying machine, a printer and a fax machine and a method for controlling the image forming apparatus, and more particularly to cleaning when abnormal discharge such as charging, transfer and separation is detected. The present invention relates to a mechanism control method.

[0002]

2. Description of the Related Art Conventionally, in image forming apparatuses such as electrophotographic copying machines, printers, and fax machines, high-voltage electrodes and cleaning members for charging, transferring, separating, etc. caused by dirt adhering to the photoconductor and dirt inside the machine Dirt and deposits,
Alternatively, when an abnormal discharge occurs in the image forming unit 920 such as the charger, the developing device, the transfer device, and the separator shown in FIG. 8, the output of the high voltage power supply 910 is stopped by the abnormality detection by the abnormality detection circuit 911, and the image is displayed. The main power source of the forming apparatus is turned off, and the image forming unit 9 by the user or service person
A control method has been used in which after the dirt and deposits of 20 are cleaned, the power of the image forming apparatus is turned on to bring the image forming apparatus into a state capable of forming an image.

On the other hand, when the high-voltage power supply 910 is abnormal, the printer control unit 900 having the control software 901 for controlling the image forming process is used to control the printer based on the abnormality detection signal output from the abnormality detection circuit 911 of the high-voltage power supply 910. A control signal is turned off by the control software 901 of the section 900 and turned on after a predetermined time.
The control is repeated several times, and if the abnormal discharge does not subside within the predetermined number of times, it is determined that the high voltage is abnormal, and the printer controller 90
Retry control for turning off the control signal of high voltage output by 0 and stopping the image forming apparatus has been used. In addition, these are 1 of the imaging system unit 920.
The same applies to the developing device used as one.

Further, the control software 901 of the printer control unit 900 turns on / off at a predetermined time cycle when abnormal discharge is detected.
The control signal to turn off is also used to control the discharge of the high-voltage electrode of the image forming unit 920 such as a charger, a transfer device, and a separator. The control signal is also used to control the developing bias of the developing unit as one of the image forming system units 920. Control signal on / off
The cycle is based on the image forming unit 920 and the control software 90.
The off signal of the control signal for control is currently considered to be about 20 to 200 msec depending on the control circuit of No. 1, but if it is actually turned off for 200 msec, a considerable image dropout occurs and there is a problem. Become. Also, the on time is the state of abnormal discharge, the abnormality detection circuit 9
It is determined by the capacitor constant number of 11 and the reading detection delay of the control software 901.
It cannot be said that the time is msec. It is turned on rather than on time, and after the abnormal discharge detection signal is output from the abnormality detection circuit 911 of the high voltage power supply 910, the printer control unit 9
It is more appropriate to consider it as the time until the control signal from the control software 901 of 00 turns off again.

On the other hand, it is determined that the high voltage electrode of the image forming unit 920 such as a charging device, a transfer device, a separator, or the like, or the dirt or deposits on the high voltage electrode or the cleaning member or the like is directly detected to perform cleaning. Therefore, a cleaning mechanism is provided in the image forming unit 920 instead of cleaning the dirt and adherents of the image forming unit 920 by a user or a service person, and the cleaning mechanism is operated when the main power is turned on. Only, or a control method of operating the cleaning mechanism after the completion of a predetermined number of copies based on the maintenance cycle is used.

[0006]

In the image forming apparatus using the above retry control, when a huge amount of copying is performed without turning off the main power source of the image forming apparatus, or when recording is easily performed with paper dust as a recording material. When paper is used, or when the image forming apparatus is used in a very dusty environment, oxide adheres to the high voltage electrodes of the image forming unit such as the charger, the transfer device, and the separator, There are situations where copying is performed with dust, paper dust, and dust accumulated on the photoconductor. As a result, the high voltage of the high-voltage electrode is discharged to dust, paper dust, dust, etc., and the paper dust and dust are burned to generate oxides, etc., which attach to the dust, paper dust, dust, and high-voltage electrode on the photoconductor. Abnormal discharge occurs at the high-voltage electrode due to the generated oxide. However, in the image forming apparatus using the retry control, basically, discharge due to paper dust, dust, etc. does not make a serviceman call, and therefore the image forming unit is not cleaned by a serviceman. Therefore, the discharge of the high-voltage electrodes of the image forming unit such as the charger, the transfer device, and the separator may be lacking or weakened, and problems such as image dropout may occur. In addition, the discharge condition of the high voltage electrode may be affected, and problems such as image deterioration may occur.
Further, if retry control is frequently performed, image dropouts increase.

The present invention solves the above problems, and in an image forming apparatus using retry control, operates the cleaning mechanism when the main power supply is normally turned on or after a predetermined number of copies is completed based on a maintenance cycle. In addition to such a control method, it is an object of the present invention to provide an image forming apparatus and an image forming apparatus control method for performing an appropriate cleaning operation by a cleaning mechanism to reduce unnecessary image dropout and image deterioration. Even if the abnormality detection circuit of the high-voltage power supply is activated, if the abnormality that requires a serviceman call does not occur, it is determined that the image forming unit is dirty due to dust, paper dust, dust, etc. As expected, the abnormal discharge phenomenon in the image forming unit is used to create an image before frequent image dropouts occur due to retry control. It is intended to clean the unit of discharge electrodes.

[0008]

The above-mentioned object is to provide an image forming body,
And a charging means for charging the image forming body, an exposing means for scanning and exposing an image on the image forming body charged by the charging means to form a latent image, and an exposing means for forming the latent image on the image forming body. Developing means for developing the latent image, transfer means for transferring the toner image developed on the image forming body by the developing means onto a recording material, and separation for removing and separating the recording material after the transfer of the toner image by the transferring means Image forming unit such as means, at least one cleaning mechanism is provided in the image forming unit, and a high voltage power source for outputting a high voltage to the image forming unit; An abnormality detection circuit provided inside the power supply for detecting an abnormality of the high-voltage power supply, and a printer control unit having control software for controlling the image forming process are provided, and the high-voltage power supply is provided when the high-voltage power supply has an abnormality. of the control signal by the printer control unit based on the abnormality detection signal outputted from the source
f, the control to turn on after a predetermined time is repeated several times,
In the image forming apparatus, which performs retry control to turn off the control signal of high voltage output by the printer control unit and to stop the image forming apparatus when it is judged that the high voltage is abnormal when the abnormal discharge does not subside after the predetermined number of times, If the image forming device is not stopped due to an abnormal failure because the number of retries is less than the predetermined value,
This is achieved by the image forming apparatus (first invention), characterized in that the cleaning mechanism of the image forming system unit is operated at the time when the job for which the abnormal discharge is judged is completed.

Further, the above-mentioned objects are: charging means for charging the image forming body; exposing means for scanning and exposing an image on the image forming body charged by the charging means to form a latent image; and image forming by the exposing means. Developing means for developing the latent image formed on the body, transfer means for transferring the toner image developed on the image forming body by the developing means onto a recording material, recording material after the transfer of the toner image by the transferring means At least one cleaning mechanism is used in a unit of an image forming system such as a separating unit for removing and separating electricity, and a high voltage power source for outputting a high voltage to the unit of the image forming system, and a high voltage power source provided inside the high voltage power source. An abnormality detection circuit for detecting an abnormality of the high-voltage power supply, and a printer control unit having control software for controlling the image forming process are used, and when the high-voltage power supply has an abnormality,
The control signal is turned off by the printer control unit based on the abnormality detection signal output from the high voltage power supply, and the control to turn on after a predetermined time is repeated several times. When abnormal discharge does not subside within a predetermined number of times, a high voltage abnormality occurs. In the control method of the image forming apparatus that performs the retry control of turning off the high voltage output control signal and stopping the image forming apparatus by the printer control unit, since the number of retries by the retry control is less than or equal to a predetermined value,
When the image forming apparatus is not stopped due to an abnormal failure, the cleaning mechanism of the image forming system unit is operated at the end of the job for which the abnormal discharge is determined, and the image forming apparatus control method. (Second invention)
Achieved by

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. Note that the description in this section does not limit the technical scope of the claims or the meaning of terms. Further, the following affirmative description in the embodiments of the present invention shows the best mode, and does not limit the meaning or technical scope of the terms of the present invention.

An image forming process, each mechanism, and a control method of an embodiment of an image forming apparatus using a cleaning mechanism and a control method of the image forming apparatus according to the present invention will be described with reference to FIGS. 1 to 8. . FIG. 1 is a diagram showing an entire image forming apparatus according to an embodiment of the present invention, FIG. 2 is a control block diagram of a cleaning mechanism according to the present invention, and FIG. 3 shows a cleaning mechanism control method. 4 is a flow chart of a first example shown in FIG. 4, FIG. 4 is a flow chart of a second example showing a control method of a cleaning mechanism, and FIG. 5 is a diagram showing an embodiment of a cleaning mechanism of an image forming system unit. 6 is a side sectional view of a main part of the cleaning mechanism provided in the image forming system unit, and FIG. 7 is a diagram illustrating the opening of the cleaning member provided in the cleaning mechanism of FIG. 6 from the discharge electrode at the home position. 8 is an explanatory diagram of a problem of the present invention.

According to FIG. 1, a photosensitive member 1 as an image forming body.
Around 0, a charging device 11 as a charging device, an exposure device 12 as an exposing device, a developing device 13 as a developing device, a transfer device 14c as a transferring device, and a separating device, which are respectively used as units of an image forming system, are provided around 0. Separator 14d
Further, a photoconductor cleaning device 19 as an image forming member cleaning unit is arranged. The recording paper P is at the bottom of the device.
A sheet feeding cassette 15 for storing the sheets is arranged, and a registration roller 16, a transfer device 14c, a separator 14d, a conveying belt 14a, and a fixing unit as a fixing unit are provided in a conveying path of the recording sheet P carried out from the sheet feeding cassette 15. The device 17 is arranged.

As will be described later in detail, a high voltage is applied to each of the high voltage electrodes of the charger 11, the transfer device 14c and the separator 14d which are used as an image forming system unit. In addition, a cleaning mechanism for the high-voltage electrode is provided for each. A high-voltage developing bias is also applied to the developing device 13 used as a unit of the image forming system by using a high voltage power source.

As the exposure device 12, a scanning exposure device including a laser diode and a scanning optical system or a scanning exposure device including a light emitting diode array is used, and the photosensitive member 10 is scanned in the main scanning direction and the sub scanning direction to perform image exposure. I do. Further, as the developing device 13, a developing means for performing reversal development in which toner is attached to an exposed portion on the photoconductor 10 by a development bias having the same polarity as the electrostatic latent image on the photoconductor 10 is used.

At the time of image formation, the photoconductor 10 rotates as indicated by an arrow, and as the photoconductor 10 rotates, charging by the charging device 11, image exposure by the exposure device 12 and development by the developing device 13 are performed, and the photoconductor 10 is rotated. A toner image is formed on top. The formed toner image is transferred onto the recording paper P by the transfer device 14c in the transfer area 14b, and the recording paper P is separated from the photoconductor 10 by the charge removal by the separator 14d. The recording paper P separated from the photoconductor 10 is conveyed on the conveyor belt 14a and is conveyed to the fixing device 17, and the fixing device 17
Thus, the toner image on the recording paper P is fixed. The transfer residual toner remaining on the photoconductor 10 after the transfer is cleaned by the blade of the photoconductor cleaning device 19 on the photoconductor 10.

In double-sided image formation, the recording paper P having an image formed on its surface passes through the fixing device 17 and is then sent to the reverse conveyance path 18. The recording paper P is the reverse conveyance path 18
Then, after being turned upside down, the registration roller 16 is again turned on.
Is supplied to the transfer area 14b of the transfer device 14c by the registration roller 16. In the transfer area 14b, after the toner image is transferred onto the back surface of the recording paper P, the transferred toner image is fixed onto the back surface of the recording paper P by the fixing device 17.

According to FIG. 2, A is a printer control unit having control software a, B is a high-voltage power supply having an abnormality detection circuit b, and from the control software a of the printer control unit A,
The image forming process is controlled using a control signal that is turned on / off at predetermined time intervals.

The charging device 11, the transfer device 14c, and the separator 14d, which are used as an image forming system unit, are provided with a high-voltage power source B.
A high voltage is applied to the high voltage electrode by using a control signal from the control software a of the printer control unit A by the high voltage power supply B using the charger 11, the transfer device 14c, the separator 14
The discharge of the high voltage electrodes of the image forming system unit such as d is controlled. Further, a high-voltage developing bias is applied to the developing device 13 used as a unit of the image forming system by using the high voltage power source B by the control signal.

In such control, the printer control unit A having the control software a for controlling the image forming process is used, and when the high voltage power source B is abnormal, based on the abnormality detection signal output from the abnormality detection circuit b of the high voltage power source B. The control signal is turned off by the control software a of the printer control unit A,
The on / off control of turning on after a predetermined time is repeated several times, and when the abnormal discharge does not subside for a predetermined number of times, for example, 5 times or less, it is determined that the high voltage is abnormal, and the printer control unit A turns off the high voltage output control signal. At the same time, retry control for stopping the image forming apparatus is performed. If the image forming apparatus is not stopped because the number of retries by the retry control is a predetermined value, for example, 5 times or less, when the job for which the abnormal discharge is determined is finished, the charger 11,
The cleaning mechanism of the image forming unit such as the transfer device 14c and the separator 14d is operated. In the image forming apparatus using the retry control, the discharge of paper dust, dust, etc. does not basically make a serviceman call. Therefore, the serviceman does not clean the image forming unit, but the abnormality detection circuit of the high-voltage power supply B. Even if b is activated, if an abnormal failure that requires a serviceman call does not occur,
Charging device 11 and transfer device 14 due to dust, paper dust, dust, etc.
It is expected that the image forming units such as c and the separator 14d are dirty, so the charger 11, the transfer device 14c, and the separator 1
Utilizing the abnormal discharge phenomenon of image forming unit such as 4d,
The discharge electrodes of the image forming unit such as the charging device 11, the transfer device 14c, and the separator 14d are cleaned before the occurrence of image loss due to frequent retry control.

By such retry control, the abnormal discharge state of the image forming units such as the charger 11, the transfer unit 14c, and the separator 14d is monitored by the control software a, and the image forming units are controlled by the control software a, for example. When it is determined that an abnormal failure that requires a serviceman call or the like does not occur, the charging device 11, the transfer device 14c, and the separator 1 to be described later are completed when the job for which the abnormal discharge is determined is completed.
The cleaning mechanism of the image forming unit such as 4d is controlled to operate.

A first example of the operation control of the cleaning mechanism will be described below with reference to the flow chart shown in FIG.

First, as described above, retry control is performed by the printer control unit, the control software included in the printer control unit, and the high voltage power supply and the abnormality detection circuit included in the high voltage power supply (S1-1). If, for example, an abnormal signal due to abnormal discharge is output from the abnormality detection circuit to the control software by retry control, it is determined that an abnormal failure requires a serviceman call, but if the abnormal signal is less than 5 times, the serviceman calls No call is required. It is determined whether or not there is an abnormal failure (S1-2). For example, when the abnormal signal is output five times, it is determined that there is an abnormal failure and the operation of the image forming apparatus is stopped (S1-3). An abnormal fault is output, but if the discharge is less than 5 times, the abnormal discharge has subsided, so retry control is not performed, and when one job is completed (S1-
4) It is determined whether an abnormal discharge has occurred in the charger (S
1-5) If it is determined that the charger is abnormally discharged, the cleaning mechanism of the charger is activated (S1-
6). When it is not determined that the abnormal discharge has occurred in the charger, the cleaning mechanism of the charger is not operated, and it is determined whether the abnormal discharge has occurred in the transfer device (S1-7), and the abnormal discharge in the transfer device occurs. When it is determined that the above occurs, the cleaning mechanism of the transfer unit is operated (S1-8). If it is not determined that the abnormal discharge has occurred in the transfer device, the cleaning mechanism of the transfer device is not operated, and it is determined whether the abnormal discharge has occurred in the separator (S1-9), and the abnormal discharge occurs in the separator. When it is determined that the occurrence has occurred, the cleaning mechanism of the separator is operated (S1-10). When it is not determined that the abnormal discharge has occurred in the separator, the cleaning mechanism of the separator is not operated, and it is determined whether the abnormal discharge has occurred in the developing device (S1-11), and the abnormal discharge occurs in the developing device. When it is determined that the error has not occurred, the normal sequence is continued (S1-12). Further, when it is determined that the abnormal discharge has occurred in the developing device, the photoconductor cleaning device as one of the units of the image forming system is operated to perform the photoconductor cleaning (S1-13), and then the normal operation is performed. The sequence is continued (S1-12).

The second operation control of the cleaning mechanism
4, the retry control is performed by the printer control unit, the control software included in the printer control unit, and the high voltage power supply and the abnormality detection circuit included in the high voltage power supply (S2).
-1), it is judged by the retry control whether or not there is an abnormal failure requiring a serviceman call (S2-2). For example, when an abnormal signal is output 5 times, it is judged that the abnormal failure has occurred and the image is displayed. The operation of the forming apparatus is stopped (S2-3).
An abnormal fault is output, but if the number of discharges is less than 5, the abnormal discharge has subsided, so retry control is not performed, and when one job is completed (S2-4), all cleaning mechanisms provided in the image forming unit are removed. After the photoconductor cleaning device is operated (S2-5) and the photoconductor cleaning device as one of the units of the image forming system is operated to clean the photoconductor (S2-6), the normal sequence is continued (S2-7). ).

According to FIGS. 5 to 7, as shown in FIG. 5, the back plate 4 is held by the left and right electrode holding members 1a and 2a to which the discharge wire 5 as the high-voltage electrode is attached, thereby forming an image forming system. Charging device 11 and transfer device 1 as a unit
4c, the separator 14d, etc. are comprised. Back plate 4
In the upper part on the side of the openings 4a, 4b, a cleaning device 100 that is a cleaning mechanism is provided, and a slide base 102 that slides by the feed screw 3 is provided using the upper surface of the back plate 4 as a guide. Electrode holding member 2
The side a is the home position of the slide base 102.

An insulating resin, such as ABS resin, is used for the electrode holding member 1a and the electrode holding member 2a.
The back plate 4 is formed of a stainless steel plate material. A tungsten wire is mainly used as the discharge wire 5, and a sawtooth electrode or the like is also used.

The receiving portion 2b provided on the electrode holding member 2a and the receiving portion 1 provided on the electrode holding member 1a.
The feed screw 3 is stretched between the slide table 102 and
A driven member 101 made of, for example, ABS, provided on the upper part of the
Is engaged with the feed screw 3, and the forward rotation of the drive motor M1 rotates the feed screw 3 to move the driven member 101 in parallel with the photoconductor 10 at a moving speed of, for example, 10 mm / sec. The slide base 102 is moved. The rotation of the feed screw 3 is performed by drive gears G1 and G2 that are rotated by the rotation of the drive motor M1.

As shown in FIG. 6, the pedestal 11 made of insulating resin is mounted on the legs 102a and 102b of the slide base 102.
2A and 112b are provided with plate-like legs 110a and 110b having a spring property using, for example, a stainless material, and the plate-like legs 110a and 110b are provided with a discharge wire using a foam material such as urethane resin. 5 cleaning member 111
a and 111b are provided. As the slide base 102 moves, the cleaning members 111a and 111b rub the discharge wire 5 and move it to clean the discharge wire 5.
This cleaning operation is performed at the timing shown in the flowcharts of FIGS. 3 and 4 described above. The moving operation of the cleaning members 111a and 111b is performed by moving the openings 4a and 4b of the slide base 102 described above with reference to FIG. 5 in the longitudinal direction.

Further, as shown in FIG. 7, trapezoidal members DKa and D having tapered portions TDa and TDb on the side surface of the electrode holding member 2a on the home position side on the slide base 102 side.
kb is provided, and the cleaning members 111a and 111b attached to the legs 110a and 110b provided on the slide base 102 are also tapered to the electrode holding member 2a side so as to face the tapered portions TDa and TDb of the trapezoidal members DKa and DKb. Parts TKa and TKb are provided.

By the movement of the slide base 102 toward the home position, the cleaning members 111a, 111 are caused by the taper portions TDa, TDb of the trapezoidal members DKa, DKb.
The legs 110a and 110b having a spring property, which are abutted against the tapered portions TKa and TKb of b, are pushed and spread to face the spring force, and the legs 1 are released so as to release the pressing of the discharge wire 5.
10a and 110b are opened. As a result, the discharge wire 5 is satisfactorily discharged at the home position, and the cleaning members 111a and 111b stand by at the home position without being affected by the discharge products.

[0030]

According to the present invention, even in an environment in which abnormal discharge frequently occurs due to dust on the photoconductor, paper dust, dust, oxides attached to the high voltage electrode, etc. In addition to the control method that activates the cleaning mechanism when the specified number of copies is completed based on the on-time or maintenance cycle, when the retry control at the time of high-voltage abnormal discharge detection works, an error that requires a serviceman call If the failure does not occur, the cleaning mechanism of the image forming unit is operated at the end of the job for which abnormal discharge is determined to clean oxides and other substances attached to the high voltage electrode, It is possible to provide an image forming apparatus and a method for controlling the image forming apparatus that can perform normal discharge and reduce image dropout and image deterioration.

[Brief description of drawings]

FIG. 1 is a diagram showing an entire image forming apparatus according to an embodiment of the present invention.

FIG. 2 is a control block diagram of a cleaning mechanism according to the present invention.

FIG. 3 is a flowchart of a first example showing a method for controlling a cleaning mechanism.

FIG. 4 is a flowchart of a second example showing a method of controlling the cleaning mechanism.

FIG. 5 is a diagram showing an embodiment of a cleaning mechanism of an image forming system unit.

FIG. 6 is a side sectional view of a main part of a cleaning mechanism provided in the image forming system unit.

7 is an explanatory diagram of opening of a cleaning member provided in the cleaning mechanism of FIG. 6 from a discharge electrode at a home position.

FIG. 8 is an explanatory diagram of a problem of the present invention.

[Explanation of symbols]

5 discharge wire 10 photoconductor 11 charger 12 Exposure equipment 13 Developer 14c transfer device 14d separator 19 Photoconductor cleaning device 100 cleaning device 102 slide table 111a, 111b Cleaning member A printer control unit Control software B High voltage power supply b Abnormality detection circuit

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tokio Shiroichi             2970 Ishikawa-cho, Hachioji-shi, Tokyo Konica stock             In the company (72) Inventor Nori Sasamoto             2970 Ishikawa-cho, Hachioji-shi, Tokyo Konica stock             In the company (72) Inventor Yoshiteru Katayama             2970 Ishikawa-cho, Hachioji-shi, Tokyo Konica stock             In the company F term (reference) 2H027 DA03 DE05 DE07 ED03 ED24                       ED27 EE07 EF12 EF13 EK03                       EK13 EK15 FB07                 2H134 GA01 GA02 GA05 GB02 HD00                       HF06 KA40 KB05 KC10 KD08                       KG01 KG04 KH14                 2H200 GA23 GA33 GA34 GA44 GA49                       GB12 GB22 GB25 HA12 HA28                       HB03 HB45 HB48 JA03 JA18                       JA25 JA28 JA29 JA30 KA02                       KA07 KA25 KA28 KA29 KA30                       LA22 LA27 LA29 LB02 LB08                       LB13 LB35 MA01 MA04 MA08                       NA13 PA10 PA28 PB03 PB26                       PB34

Claims (8)

[Claims] 1. An image forming body, a charging means for charging the image forming body, an exposing means for scanning and exposing an image on the image forming body charged by the charging means to form a latent image, the exposing means. Developing means for developing the latent image formed on the image forming body by the transfer means, transfer means for transferring the toner image developed on the image forming body by the developing means onto the recording material, after transfer of the toner image by the transferring means Neutralize the recording material of
An image forming system unit such as a separating unit for separating, at least one cleaning mechanism is provided in the image forming system unit, and a high voltage power source for outputting a high voltage to the image forming unit. An abnormality detection circuit provided inside the high-voltage power supply for detecting an abnormality of the high-voltage power supply, and a printer control unit having control software for controlling an image forming process are provided. Based on the abnormality detection signal output from the power supply, the control signal is turned off by the printer control unit, and the control to turn on after a predetermined time is repeated several times, and if the abnormal discharge does not subside within the predetermined number of times, it is judged as a high voltage abnormality. Then, the printer control unit turns off the high-voltage output control signal and also performs retry control for stopping the image forming apparatus. In the above, since the number of retries by the retry control is less than or equal to a predetermined value, if the image forming apparatus is not stopped due to an abnormal failure, the image forming system unit is terminated at the time when the job in which the abnormal discharge is determined is completed. An image forming apparatus characterized by operating the cleaning mechanism. 2. The image forming apparatus according to claim 1, wherein the cleaning mechanism cleans the charging unit. 3. The image forming apparatus according to claim 2, wherein the cleaning mechanism cleans the transfer unit. 4. The image forming apparatus according to claim 2, wherein the cleaning mechanism cleans the separating unit. 5. The image forming member cleaning means for cleaning the image forming member, wherein the cleaning mechanism comprises:
The image forming apparatus according to claim 2, wherein the image forming body cleaning unit cleans the image forming body. 6. The image forming apparatus according to claim 1, wherein only a cleaning mechanism of an image forming system unit related to an abnormal signal output from the high voltage power supply is operated. . 7. The cleaning mechanism for all units of the image forming system is operated even when retry control is performed due to any abnormal signal output from the high-voltage power supply. The image forming apparatus according to any one of 1 to 5. 8. A charging means for charging an image forming body, an exposing means for scanning and exposing an image on the image forming body charged by the charging means to form a latent image, and an exposing means for forming the latent image on the image forming body. Developing means for developing the latent image thus formed, transfer means for transferring the toner image developed on the image forming body by the developing means onto a recording material, and discharging the recording material after transfer of the toner image by the transferring means,
At least one cleaning mechanism is used in an image forming unit such as a separating unit for separating, and a high voltage power source for outputting a high voltage to the image forming unit, and a high voltage source provided inside the high voltage power source. An abnormality detection circuit for detecting an abnormality in the power supply and a printer control unit having a control software for controlling the image forming process are used, and based on the abnormality detection signal output from the high voltage power supply when the high voltage power supply has an abnormality. The control signal is turned off by the printer control unit and turned on after a predetermined time is repeated several times. When abnormal discharge does not stop within a predetermined number of times, it is determined that the high voltage is abnormal, and the printer control unit controls the high voltage output. A method for controlling an image forming apparatus, which performs a retry control for turning off a signal and stopping the image forming apparatus, comprising: Since the number of retries by the lie control is less than a predetermined value, if the image forming apparatus is not stopped due to an abnormal failure, the cleaning mechanism for the image forming system unit is completed at the time when the job for which the abnormal discharge is determined is completed. A method for controlling an image forming apparatus, comprising: