JPH0416869A - Image forming device - Google Patents

Abstract

PURPOSE:To enable secure cleaning operation by arranging detecting means at both end parts of the reciprocal movement range of a cleaning means, and detecting the cleaning means at the start of the time of the cleaning operation and performing the cleaning operation. CONSTITUTION:The detecting means 29f and 29g are arranged at both the end parts of the reciprocal range of the cleaning means 26 or at stand-by positions and after the cleaning means 26 is detected at the start of the time of the cleaning operation, the cleaning operation is carried out. Namely, when the cleaning means 26 reaches one end side of its movement stroke, the detecting means 29f and 29g detect it and a controls and stops a driving means 29d accord ing to the detection signal. When the cleaning means 26 begins to move, the cleaning means 26 is moved to the movement range end part and then the cleaning operation is started. Consequently, the whole electrostatic charger securely cleaned.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an image forming apparatus, and more particularly to an image forming apparatus equipped with a device for automatically cleaning a charger portion of an image forming means using electrophotographic technology. It is related to the device.

<Prior Art> In an image forming apparatus using electrophotographic technology, toner, dust, and ground contaminants are more or less constantly floating in the apparatus. As copying is continued for a long time, these contaminants adhere to the shield member, corona wire (charging wire), etc. of the built-in corona charger. In this way, as the number of copies made increases, contaminants accumulate on each part of the charger, and after approximately several thousand copies are made, the adhering contaminants cause a decrease in charging efficiency and uneven charging/removal. start.

This ultimately results in a reduction in the quality of the copied image.

Therefore, primitive methods are used, such as copying machine users or service personnel periodically taking out the charger from inside the machine and cleaning it, or cleaning the charger by taking it in and out of the machine with a cleaning tool. Ta. However, corona wires are generally thin conductive wires such as tungsten wires, and they often break with the slightest force. Also, unless you remember to perform these cleanings regularly, it is difficult to prevent the image quality from deteriorating. However, if the inside of the charger is dirty, it is necessary to take it out and clean it instead of visual discrimination, which is extremely troublesome. In reality, contamination of the charger is often noticed and cleaned after a deterioration in copy image quality is discovered, making it difficult to maintain the charger in a satisfactory state at all times.

In view of these problems, the charger is equipped with a corona wire cleaning member that moves along the corona wire and a drive mechanism that moves the cleaning member, and the control circuit is installed without removing the charger from the main body of the copying machine. The drive mechanism is activated at the appropriate time according to a preset program to automatically clean the corona wire, and if necessary, an activation signal is input to the drive mechanism using a manual switch to perform the cleaning operation at any time. It has been considered that
JP-A No. 62-288865, etc.).

<Problems to be Solved by the Invention> Conventional automatic charging device cleaning means often have mechanisms that convert rotational motion into linear motion, such as those that use a lead screw as a drive mechanism or those that use a wire and pulley. In order to reciprocate the corona wire cleaning member along the corona wire, the motor, which is the driving means, is rotated in the forward and reverse directions.
Control means for reversing the rotation, means for detecting the position of the corona wire cleaning member, etc. are required.

For example, as a relatively simple example, a drive motor with DC
The motor is used to enable forward and reverse rotation, and after moving the corona wire cleaning member in one direction, the corona wire cleaning means is brought into contact with the stomper at the end of the movement stroke and stopped while the motor is energized. It is known that after a predetermined period of time has elapsed, the motor is reversed to return to its original position, and here again, at the end of the movement stroke, the corona wire cleaning means abuts against a stopper and is stopped.

However, in the conventional configuration, the corona wire cleaning means is stopped by hitting the stoppers at both road points of the movement stroke, so an external force acts impulsively on the drive mechanism. The disadvantage was that the component parts needed to be rigid.

In particular, when a lead screw is used, if the motor is placed at one end of the lead screw and the corona wire cleaning means is stopped at the other end of the lead screw using the method described above, a rather severe torsional torque is applied to the lead screw. There was a risk that the lid screw would be deformed due to the axial force acting on it.

Furthermore, when the cleaning member starts the cleaning operation, if the cleaning member is not at the end of its travel stroke or is not in its normal standby position, the motor is rotated in either forward or reverse direction and then returned to the standby position. If the cleaning operation is terminated at a certain point, the copying operation may be started without sufficiently cleaning the wire, resulting in a decrease in image quality. A similar situation also occurred when the power to the main body of the apparatus was turned off during the cleaning operation.

The present invention has been made in order to solve the problems of the prior art described above, and its purpose is to ensure that the components of the drive mechanism do not require high rigidity, perform cleaning operations reliably, and maintain normal image quality stably. An object of the present invention is to provide an image forming apparatus having an automatic cleaning mechanism capable of cleaning the image forming apparatus.

Means for Solving the Problems> Means for solving the above problems and applied to the embodiments described below include an image forming means for forming an image, and a charger that moves along the charger of the image forming means. a cleaning means for cleaning the charger by cleaning the charger; a drive means for reciprocating the cleaning means along the charger; a detection means for detecting the cleaning means; a control means for controlling the driving means, the detection means is arranged at both ends of the reciprocating range of the cleaning means or at a standby position, and the cleaning operation is performed after the detection means detects the cleaning means at the start of the cleaning operation. It is characterized by being configured to perform the following.

<Operation> According to the above means, the cleaning means is moved along the charger by the driving means, and the charger is cleaned in the process of this movement.

When the cleaning means moves toward one end of the movement stroke, the detection means detects this, and the control means controls the drive means to stop it based on the detection signal of the detection means.

Therefore, when the cleaning means is stopped, there is no risk of an impactful external force acting on the driving means.

Moreover, when the cleaning means starts moving, by performing the cleaning operation after moving the cleaning means to the end of the moving range, the entire charger can be reliably cleaned.

<Embodiment> An embodiment of the image forming apparatus according to the above means will be described below.

[First example]

Figure 1 is a sectional view of the charger, cleaning means and its driving means, Figure 2 is a sectional view of the same side with some parts omitted, and Figure 3 is an explanatory cross-section when the charger is attached to the main body of the device. 4 is a sectional side view for explaining the same, FIG. 5 is a perspective view of the driving means, FIG. 6 is a schematic cross-sectional view of the entire image forming apparatus, and FIG. 7 is a control of the entire image forming apparatus including the driving means. Block diagram of means, No. 8
The figure is a flowchart showing the control details of the driving means.

First, an outline of the entire image forming apparatus will be explained with reference to FIG.

(ii!j Outline of the entire image forming apparatus) In the figure, 1 is the main body of the apparatus, and the upper surface thereof is equipped with a document table 2 made of a transparent glass plate or the like.

A document 0 to be copied is placed on the document table 2 with the image surface facing downward, and is pressed and fixed by the document pressure plate 3 .

Also, inside the device main body 1 is a light source 4, a reflecting mirror 5, 6, 7.
．． 8.9.10 and an optical system such as an imaging lens 11, light is irradiated from the light source 4 onto the original 0 on the original table 2, and the reflected light is transmitted to the reflection mirrors 5 to 10 and the imaging lens 11. is guided to a photosensitive drum 12 as an image forming means.

Here, the light source 4 and the reflecting mirrors 5 to 10 move at a predetermined speed in the direction of arrow a shown in FIG. 6 to scan the image surface of the document 0 during image formation.

A charger 13 and a developer 1 are arranged around the photoreceptor drum 12.
4, a transfer charger 15, and a cleaner 16 are arranged.

i! When the photoreceptor drum 12 rotates at a predetermined circumferential speed in the direction of the arrow shown in FIG. 6 during image formation, the surface of the photoreceptor drum 12 is uniformly charged by the charger 13, and then the original is charged by the optical system. An electrostatic latent image corresponding to the image plane 0 is formed, and then a developed image (toner image) is formed from the electrostatic latent image by the developing device 14.

Further, a cassette 17 loaded with transfer sheets P is removably installed on the lower side of the main body l of the apparatus. The transfer sheet P in this canopy 17 is transferred to the pickup roller 18
After being separated one by one by the conveyor rollers 19, the sheets enter the nip portion of the registration rollers 20. This registration roller 20 is connected to the photosensitive drum 12.
The feeding timing is set so that the upper toner image and the transfer sheet P coincide with each other, and the transfer sheet P that has entered the nip part
is sent between the photoreceptor L' ram 12 and the transfer charger 15.

The transfer charger 15 transfers the toner image on the photosensitive drum 12 onto the transferred transfer sheet P. The transfer sheet P on which the toner image has been transferred is sent to the fixing device 22 by the conveying section 21, and after the toner image is fixed by the fixing device 22, the transfer sheet P is transferred onto a tray 24 provided outside the main body 1 of the apparatus by the ejection roller 23. is discharged.

Note that, when the toner image is transferred to the transfer sheet P, the remaining toner on the photosensitive drum 12 is removed by the cleaner 16, and the above-described image forming process is repeated.

(Transfer charger 15 part) Next, the transfer charger 15 part is shown in FIGS. 1 to 5.
This will be explained in detail with reference to the drawings.

As shown in FIG. 1, the transfer charger 15 includes a charging wire 25 made of tungsten wire or the like provided in a shield member 27, and a cleaning device for cleaning the charging wire 25 inside the shield member 27. Means 26 are movably mounted.

(Cleaning Means) The cleaning means 26 holds a cleaner 26b made of an elastic member such as felt or sponge in a holder 26a.
The cleaner 26b moves in the axial direction of the charged wire 25 while holding the charged wire 25, and removes toner, dust, ground contaminants, etc. that have adhered and accumulated on the band 1 wire 25. It is something.

The holder 26a is made of flexible material such as synthetic resin, and is provided with ribs 26a1 projecting in the horizontal direction on both sides of a central portion formed in the shape of a diagonal cross-section. , a standing piece 26a2 on top
is provided, and the cleaner 2 is provided on the upright piece 26a2.
6b is fixed by the adhesive side or the like.

Further, a retaining convex portion 26a is provided at the lower part of the holder 26a.

The holder 26 configured in this way has a cross section of approximately U.
One longitudinal end of the shield member 27 formed in a letter shape (the left end in FIG.
The shield member 27 is set from the opening of the front end thereof, and is movable in the longitudinal direction while being guided by a sulin H7a provided on the bottom surface of the shield member 27 and extending in the longitudinal direction.

Further, the shield member 27 is provided with side walls 27b standing up on both sides, and the side walls 27b are connected to the holder 2.
6 to the other end of the shield member 27 (the right end in FIG. 2, the end located on the back side of the main body l),
This is to press the rib 26a1 of the holder 26 inward, thereby causing the upright piece 26a! are bent so that they approach each other, and the cleaner 26b holds the charged wire 25.

Further, a shield stand 27c serving as a guide member is fixed to the lower part of the shield member 27 over the entire longitudinal direction. A guide groove 27c that communicates with the slit 27a and extends in the longitudinal direction is formed at the center of the shield stand 27c.
, protrudes downward from.

The transfer charger 15 and the cleaning means 26 are detachably attached to a rail member 28 fixed to the conveyance section 21 on the apparatus main body 1 side.

That is, side walls 28a having a substantially U-shaped cross section are provided on both sides of the rail member 28 in the width direction, and guide portions 27c are provided on the side walls 28a on both sides of the shield stand 27c.
, are engaged to install the shield member 27 within the rail member 28. A push-up spring 28b is provided at this side wall 283 portion to push up the charging wire 25 toward the photosensitive drum 12 by pushing the guide portion 21ct.

The rail member 28 is equipped with a drive means 29 for the cleaning means 26, as shown in FIGS. 2 and 5.

That is, a slit 28c extending in the longitudinal direction is provided at the center position of the bottom surface of the rail member 28.
A drive block 29a constituting the drive means 29 is movably attached to 8c.

(Drive means) On both sides of the drive block 29a, there are
As shown in the figure, a guide groove 29a is formed to engage with the inner edge of the sulin 28c. Further, a screw hole 29a2 penetrating in the axial direction is provided in the lower part of the driving bronck 29a, and the rail member 2 is inserted into the screw hole 29a2.
A lead screw 29b disposed parallel to the slit 28c is screwed into the lower part of the slit 8, and the rotation of the lead screw 29b causes the lead screw 29b to move in the longitudinal direction along the slit 28c. Furthermore, engagement walls 29a1 and 29a4 that stand vertically are provided on the upper part of the drive block 29a, and the engagement convex portion 26a engages between these engagement walls 29a1 and 29a4, and the cleaning means 26 and drive means 29 are connected. Here, one engagement wall 29a3 located on the rear side in the longitudinal direction is set higher than the other engagement wall 29a4 located on the front side, and there is a step l (see Fig. 2) between them. It is provided.

The lead screw 29b is set to have approximately the same length as the transfer charger 15, as shown in FIGS. It is rotatably supported via a slide bearing 28e. A worm wheel 29c is provided at one axial end of the lead screw 29b (on the right side in FIGS. 2 and 5).
A worm gear 29e, which is rotationally driven by a drive motor 29d, is screwed into the worm gear 29e. Therefore, drive motor 2
By rotating the drive block 29d in the forward and reverse directions, the drive block 29a
is reciprocated between one longitudinal end (front side) and the other longitudinal end (back side) along the slit 28c, whereby the cleaning means 26 cleans the slit 27a within the shield member 27.
In the process of this reciprocating movement, the band Ti
Clean line 25.

Note that the drive motor 29d is fixed to the transport section 21.

Further, although not shown in detail, the conveyance section 21 is integrated with the rail member 28 and the transfer charger 15 to remove the photoreceptor drum 12 in order to clear the jam of the transfer sheet P.
The rear end portion on the side of the fixing device 22 serves as a center of rotation and is swingably attached to the apparatus main body l so as to be away from the fixing device 22 side. In the operating state, in order to maintain a constant gap between the charging wire 25 and shield member 27 of the transfer charger 15 and the photosensitive drum 12, the transfer charger 15
The transport unit 21 is pushed up until a part of the shield member 27 (a part of the shield member 27) comes into contact with a holding member (not shown) of the photoreceptor drum 12, and the transport unit 21 is locked to the apparatus main body 1 at the same position. . At this time, the shield member 27 is pushed down within the rail member 28 by the holding member of the photosensitive drum 12 against the spring force of the push-up spring 28b (see FIG. 1).

Furthermore, microswitches 29f and 29g as detection means are provided on the lower surface near both ends in the longitudinal direction of the rail member 28, as shown in FIG. It is disposed at the left end of the member 28, and this position is set as a standby position for the cleaning means 2G. The other switch 29g is disposed at the right end of the rail member 28 shown in FIG.

When a part of the micro spinches 29f and 29g pushes the lever 29r1.29g1 of the micro spinches 29f and 29g, the drive block 29a
is adapted to detect that the rail member 28 has moved to the end of the longitudinal movement range.

Incidentally, the detection signal of the microsinch 29f is inputted to a control means 30 shown in FIG.

(Control Means) The control means 30 controls the entire image forming apparatus including the driving means 29, and the CPU 3 controls the entire image forming apparatus.
0a, a ROM 30b that stores the control contents of the driving means 290 shown in FIG. 8, and a ROM 30b that is used as a work area for the CPU 30a and temporarily stores various data.
It is composed of an AM 30c, an interface 30c1, etc.

The microswitches 29r and 29g are connected to the input port side of the interface 30 (I, the drive motor 29d is connected to the output port side via a driver 31, and the reading system (light source 4) is connected to the input port side of the interface 30 (I).
, reflective mirror 5, etc.) and the image forming system (photoreceptor drum 1)
2. Charger 13, transfer (V electric device 15, etc.) and the transfer sheet slow speed system (big-amp roller 18, conveyance roller 1
9, transport unit 21, etc.) are connected.

Next, the operation of the above embodiment will be explained.

When the transfer charger 15 is installed in the apparatus main body I, the conveying section 21 is kept separated from the photoreceptor drum I.

In this state, the shield stand 27c of the transfer charger 15
When the guide portion 27c is engaged with the side wall 28a of the rail member 28 and the transfer charger 15 is inserted into the rail member 28, the guide portion 27c2 is pushed up against the side wall 28a by the push-up spring 28b as shown in FIG. Enter while being pushed upwards.

Here, the drive block 29a is normally stopped near the micro spinch 29f (on one longitudinal end side of the rail member 28), and the transfer charger 15 is placed on the other longitudinal end side (inner side) of the rail member 28. When the holder 26a is inserted into the drive block 29, the engagement protrusion 26a3 of the holder 26a engages with the drive block 29, as shown in FIG.
one engaging wall 2 by climbing over the other engaging wall 29a4 of
Engages with 9a3.

Once the transfer charger 15 has been installed, transfer the transfer charger 1
The conveyance section 21 is pushed up toward the photoreceptor drum 12 until a part of the shield member 27 of No. 5 comes into contact with the holding member of the photoreceptor drum 12. At this time, the transfer charger 15 also moves upward together with the rail member 28, but when it comes into contact with the holding member, it is pushed down by the holding member against the spring force of the push-up spring 28b. As a result, the engaging protrusion 2 of the holder 26a
The lower end of the drive block 29a is moved from the state shown in FIG. 4 to the state shown in FIG.
4, and the holder 26a is lower than the drive block 29a.
engage with.

As a result, the main body l of the apparatus becomes operational. In this case, the driving means 29 is controlled according to the flowchart shown in FIG.

First, when power is turned on to the device main body 1 in step S1,
Proceeding to step S2, it is determined whether the microswitch 29f at the standby position is on.

When the microswitch 29f is on, that is, when the drive block 29a is located at the standby position for the rail member 2 (lead screw 29d), the process moves to step S4 and the drive motor 29d rotates normally. In addition,
If the microswitch 29f is not turned on, the process moves to step S3 and the drive motor 29d is rotated in the opposite direction to return the drive bronck 29a to the standby position of the rail member 28.

When the drive motor 29d rotates forward in step S4, the rotation of the drive motor 29d is transmitted to the lead screw 29d through the engagement between the worm gear 29e and the worm wheel 29c, and the lead screw 29d rotates. As a result, the drive block 29a is guided by the slit H8c and moves from one longitudinal end of the rail member 28 to the other end, and as the drive block 29a moves, the holder 26a is also guided by the slit 27a in the same direction. During this movement, the charged cotton 2 is removed by the cleaner 26b.
Remove toner, dust, and ground contaminants that adhere to 5.

Next, the process moves to step S5, and it is determined whether the micro-sinch 29g on the opposite side to the standby position is on. If this microsinch 29g is not turned on,
The process moves to step S4, and the reverse rotation of the drive motor 29d is continued.

When the microswitch 29g is on, that is, when the drive block 29a moves to the rear end in the longitudinal direction of the transfer charger 15 and presses the lever 29g1 of the microswitch 29g, the process moves to step S6 and the drive circuit is turned on. The drive motor 29 is activated by operating an electric brake (not shown).
Stop d.

Next, the process moves to step S7, and after a predetermined period of time has elapsed, the drive motor 29d is rotated in the reverse direction. When the drive motor 29d rotates in the reverse direction, the holder 26a is moved by the drive block 29a to the standby position, which is one longitudinal end of the rail member 28, and during this movement, the cleaner 26b is moved as before.
Toner, dust, and other contaminants adhering to the band ffl cotton 25 are removed by this method.

Next, the process moves to step S8, and it is determined whether the microswitch 29f on the standby side is on. If this microswitch 29 [is not turned on, step S
7 to continue the reverse rotation of the drive motor 29d.

When the microswitch 29f is on, that is, the drive block 29a moves to the standby position, which is the front end of the transfer charger 15 in the longitudinal direction, and the microswitch 29' is turned on.
If the lever 29f is pressed, the process moves to step S9, where the electric brake (not shown) in the drive circuit is activated to stop the drive motor 29d, in the same way as described above.

As a result, the drive block 29a moves to the microsinch 29.
Stops near f (one end side of the rail member 28 in the long plane direction),
Cleaning of the charging wire 25 is completed.

In this way, at one end in the longitudinal direction of the rail member 28, the drive processor 29a is activated by the microswitches 29f and 29g.
As soon as the drive motor 29d is detected, the power to the drive motor 29d is stopped, and the lead screw 29 is locked.
Since no torsional torque is applied to the lead screw 29b, there is no possibility that the lead screw 29b will be deformed.

Note that when removing the transfer charger 15 from the apparatus main body 1 for maintenance etc., the transfer unit 2
1 is released from the photoreceptor drum 1, the shield member 27 is released from the holding member of the photoreceptor drum 12. As a result,
As shown in FIG. 3, the guide portion 27C is moved by the spring force of the push-up spring 28b! is pressed against the upper part of the side wall 28a of the rail member 28, and the lower end of the engaging protrusion 26a of the holder 26 is positioned above the other engaging wall 29a4 of the drive block 29a, and the transfer charger 15 is removed. becomes possible.

By pulling out the transfer charger 15 from the rail member 28 in this state, the transfer charger 15 can be taken out from the apparatus main body 1.

In the embodiment described above, when cleaning the transfer charger 15, no matter where the cleaning means 26 is stopped, it returns to the standby position and then moves back and forth, so that reliable cleaning can be performed.

Further, when the cleaning means 26 moves to the end of the movement range, the micro switch 2'0.29g detects this and stops the driving of the drive motor 29d.
By stopping the lead screw 29b, no external force is applied to the lead screw 29b, and there is no risk of the lead screw 29b being deformed.

Further, the cleaning means 26 and the driving means 29 can be easily attached and detached by simply engaging and disengaging the engaging protrusion 26a of the holder 26 and the engaging walls 29a3 and 29a4 of the driving bronck 29a. This allows efficient maintenance of the transfer charger 15.

It is of course possible to clean the charging wire 25 by manually operating the holder 26 after taking the transfer charger 15 out of the apparatus main body l.

[Other Examples]

In the embodiment described above, the microswitches 29f and 29g serving as the detection means of the cleaning means 26 were arranged at both ends of the movement range of the cleaning means 26, but this detection means only the microswitch 29f was arranged at the standby position. You may also do this. Even in this case, if the cleaning operation is performed after the microswitch 29f detects that the cleaning means 26 has reached the standby position at the start of cleaning, the same effect as in the embodiment described above can be obtained. I can do it.

Further, as the detection means, the microswitches 29f, 2
It goes without saying that not only the 9g sensor but also an optical sensor or the like can be used.

Further, in the above embodiment, the drive block 29a is moved by the lead screw 29b, but the drive block 29a may be fixed to a belt and moved back and forth. In this case, the mechanism is simplified because a pulley and a heald are used instead of the lead screw 29b, worm wheel 29c, and worm gear 29e.

Further, in the above-described embodiment, the transfer charger 15 is cleaned by the cleaning means 26, but the same structure can be used for cleaning other types of chargers, such as the negative charger 13.

<Effects of the Invention> As explained above, according to the present invention, the detection means are arranged at both ends of the movement range of the cleaning means or at the standby position, and the cleaning means is returned to the standby position at the start of the cleaning operation, and then the cleaning operation is started. This makes it possible to perform reliable cleaning, thereby preventing abnormal deterioration in image quality.

[Brief explanation of the drawing]

1 to 8 show embodiments of the present invention.
The figure is a sectional view of the charger, cleaning means and its driving means,
Part 2 is a sectional view of the same side with some parts omitted, Figure 3 is an explanatory sectional view when the charger is attached to the main body of the device, Figure 4 is a sectional side view of the same, and Figure 5 is the driving means. 6 is a schematic cross-sectional view of the entire image forming apparatus, FIG. 7 is a block diagram of the control means for the entire image forming apparatus including the driving means, and FIG. 8 is a flowchart showing the control details of the driving means. be. 1 is the main body of the apparatus, 2 is the document table, 3 is the document pressure plate, 4 is the light source, 5, 6, 7, 8, 9, 10 is the reflecting mirror 11 is the imaging lens, 12 is the photosensitive drum, and 13 is the charger. , 14 is a developing device, 15 is a transfer charger, 16 is a cleaner, 17 is a cassette, 1B is a big amplifier roller, 19 is a slip roller, 20 is a registration roller, 21 is a conveyance section, 22
23 is a fixing device, 23 is a discharge roller, 24 is a tray, 25 is a charging wire, 26 is a cleaning means, 26a is a holder, 26a+ is a rib, 26a2 is an upright piece, 26a3 is a retaining convex portion, 26b
is a cleaner, 27 is a shield member, 27a is a slit,
27b is a side wall, 27c is a shield stand, 27c is a guide groove, 27c2 is a guide portion, 28 is a rail member, 28a is a side wall, 28b is a push-up spring, 28c is a slit, 28
d is a bearing portion, 28e is a sliding bearing, 29 is a driving means, 2
9a is a drive block, 29a + is a guide groove, 29a2
is a screw hole, 29a1.29a4 is an engagement wall, 29b is a lead screw, 29c is a worm wheel, 29d is a drive motor, 29e is a worm gear, 29f, 29g are detection means (microsinch), 29r+, 29g
+ means lever 30! IJ JTE means, 30a is CPU
, 30b is a ROM, 30C is a RAM, and 30d is an interface.

Claims (2)

[Claims] (1) An image forming means for forming an image; a cleaning means for moving along a charger of the image forming means to clean the charger; and a reciprocating means for moving the cleaning means along the charger. a drive means for moving the cleaning means; a detection means for detecting the cleaning means; and a control means for controlling the drive means based on a detection signal from the detection means, the detection means being moved within a reciprocating movement range of the cleaning means. An image forming apparatus characterized in that the image forming apparatus is arranged at both ends and is configured to perform a cleaning operation after the detection means detects the cleaning means at the start of a cleaning operation. (2) an image forming means for forming an image; a cleaning means for moving along a charger of the image forming means to clean the charger; and a reciprocating means for moving the cleaning means along the charger. A drive means for moving the cleaning means; a detection means for detecting the cleaning means; and a control means for controlling the drive means based on a detection signal from the detection means, the detection means being moved within a moving range of the cleaning means. An image forming apparatus characterized in that the image forming apparatus is arranged at a standby position, which is an end, and is configured to perform a cleaning operation after the detection means detects the cleaning means at the start of a cleaning operation.