JP3442557B2 - Cleaning device for charged wire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] TECHNICAL FIELD The present invention relates to a copier, a pudding
Or facsimile, etc.
Related to a cleaning device for a charging wire of a charging device
It is. [0002] 2. Description of the Related Art An image forming apparatus includes a photosensitive member which is rotated at a constant speed.
It has an image forming unit equipped with a drum.
The original image formed on the surface of the
Is configured to perform copying.
Photoreceptor drum was evenly charged on its surface
After that, the document is exposed to the light image that is read and a latent image is formed.
And the toner is adsorbed and becomes visible.
Have been. The supply of charge to the surface of the photoconductor drum is
Frame and a charged wire to which high DC voltage is applied.
The resulting charger is used. By the way, the charging
The space where the paper is stretched arises from toner and transfer paper
Because of the bad environment where fine particles scattered,
The above particles adhere to the outer peripheral surface of the charged wire
This makes it impossible to obtain proper corona discharge
Inconvenience. In order to solve such inconvenience, a conventional method
For example, as described in JP-A-6-161222
The cleaning pad made of a flexible material against the charged wire
This cleaning pad is attached to the charging wire.
Adhering by periodically reciprocating along the installation direction
Cleaning to wipe off particles etc.
Devices are known. [0004] SUMMARY OF THE INVENTION A charged wire is an image product.
In order to maintain the quality, a uniform
It is necessary to supply a charge. However, the conventional
Cleaning device, the cleaning pad is in tension
After cleaning, the cleaning
State in which the pad is retracted to one end of the charging wire, that is,
Even when the charger is in operation, the charging device is in the retracted position.
The ear bites into the cleaning pad and the charged wire
And the surface of the photoreceptor drum are difficult to maintain in parallel.
Supply a uniform charge across the width of the photoreceptor drum surface.
And it was extremely difficult. In addition, conventional cleaning equipment
Even if the charging wire is initially parallel to the photoconductor drum,
Even if it can be stretched, the reciprocating movement of the cleaning pad
As I repeated, the wire cut into the cleaning pad,
It is said that the parallel state of both cannot be stably maintained for a long time
Had a problem. [0005] The present invention solves the above problems.
To ensure that the charged wires are clean.
While maintaining the parallel state with the photoconductor drum.
Providing a cleaning device for a charged wire to maintain
It is an object. [0006] According to the first aspect of the present invention,
Cleaning memberStretched between both sides in the longitudinal direction of the shield case
The charged wireforPress contactRu QingSweep position and press
Switch to the release position
The main body is movable along the direction in which the charging wire is stretched.
Department andthisThe main body is located at one end of the charging wire
When the cleaning member is moved from the cleaning position to the release position.
Position switching means for switchingAnd the main body is
Move from one side end to the other side along the tension direction
And a driving means for pressing the cleaning member against the charging wire.
Move the charging wire along the tensioning direction while touching it.
Wire that cleans the charged wire by
In the cleaning apparatus of the above,
A rotation axis perpendicular to the direction in which the wire is stretched, and
The cleaning member protruding radially toward the charging wire
A pair of support arms in the width direction for supporting the
A horizontal arm installed between the arms and a support arm
And a claw protruding on the opposite side.
The cleaning member is provided on the surface of the horizontal rod facing the charging wire.
Attached and the main unit is set to the cleaning position.
In contact with the charging wire, and the main unit is set to the release position
In one state where the contact with the charging wire is released
The position switching means, wherein the claw piece abuts
On one surface of the shield case
The claw piece fits in by being located at the end of the
The abutment of the cleaning pad on the charged wire
With release hole to releaseThat there isFeatureThings. According to this structure, the main body can be moved.
As a result, the charging wire is wiped by sliding contact with the cleaning member.
This removes adhering particles.
It is. After the cleaning process, the main body has less charged wires.
If it is returned to at least one side edge, it will come into contact with the charging wire.
The contact state is released, and the charging wire is restored to the stretched state.
Therefore, the charging wire must be stretched in parallel with the photosensitive drum in advance.
After cleaning, the charged wire
Is always parallel to the photoconductor drum.
The ram is uniformly charged in the width direction by the charging wire.
You. [0008]Also, BodyObiAlong the direction in which the
Drive means for moving from one side end to the other end
So that the drive is activated when needed or on a regular basis
So that the main unit moves along the charging wire.
This allows the cleaning member to clean the charged wire.
Processing is performed automatically. [0009]further,UpThe position switching means is as described above.Nail clipBut
One side of the shield case that abutsProvided in the main body
Is located at the end of the shield case.
With a release hole that releases the contact by fitting
Is formedYou. [0010]Therefore, The main unit moves inside the shield case
When moving, the claw piece is one of the shield cases
Pressing contact state by contacting the surface, for example, the bottom surface
(Cleaning position)While, The main body is shielded
When you return to one side of theWhen the nail piece enters the release hole,
Press contactState is solutionRemoveThe rotation axis
Become rotatableMain unitTo make it full,band
Electric wireOriginalIt is restored to the stretched state.And position cut
Simple configuration because the release hole is adopted as a replacement means
However, the released state of the main body can be easily obtained. [0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a charging device according to the present invention.
Embodiment of a copying machine to which a cleaning member of the cleaning device is applied
FIG. 2 is an internal configuration diagram showing the state.
The copying machine 1 is provided with a copying machine body 1a and a top portion thereof.
The copying machine main body 1a includes an original mounting portion 1b,
Structure 2, image forming unit 3 including photoconductor drum 31, paper transport
A mechanism 4, a reversing mechanism 5, and a double-sided unit 6
Is formed. The document placing portion 1b is located on the top surface of the copying machine main body 1a.
An element that opens and closes the surface of the contact glass 1c attached to the opening
Use the manuscript holder to manually set the original
It is like that. In addition, as the document placing portion 1b,
Documents stacked on top of contact glass 1c
Are loaded onto the contact glass 1c one by one and the exposure position
The automatic document feeder is set to
It is also possible to use an arrangement. The optical mechanism 2 includes a contact glass 1c.
The original on the home position H. Run at the time of forward movement based on P
Light source 211 comprising a halogen lamp to be inspected and a reflecting mirror
Irradiated by a first optical system 21 having a light source 211
And a plurality of guides for guiding the original image reflected on the original surface to the image forming unit 3.
Optical system 22 having reflecting mirrors 221 and 222
A lens 23 for forming an original image on the surface of the photosensitive drum 31;
The first and second optical systems 21 and 22 are moved in a reciprocating direction (in FIG.
A pair of guide rails 24 for guiding the
And the first and second optical systems 21 and 22 along the guide rail 24.
Drive means (not shown) for running at predetermined speeds.
I have. The reflecting mirror 223 is an image of the original that has passed through the lens 23.
To the exposure position of the photosensitive drum 31. The light from the light source 211 is a contact glass.
1c is directed toward the original set on
The document image is obtained by reflection. This manuscript image is indicated by a dashed
Reflected by the reflecting mirrors 212, 221, 222 as indicated by the lines.
After passing through the lens 23, the photosensitive member
It is guided to the exposure position of the drum 31. The image forming section 3 is operated by a driving means (not shown).
When the photosensitive drum 31 is rotated at a constant speed in the measuring direction,
In the vicinity of the photosensitive drum 31, the rotation direction is upstream.
Main charging section 32, developing section 33, toner collecting roller section from the side
34, transfer unit 35, separation unit 36, and cleaning unit 3
7 is provided. The photosensitive drum 31 is attached to the main charging section 32
After the surface is more uniformly charged, the original image is exposed and
A latent image is formed. This electrostatic latent image is transferred to the developing unit 33 by toner.
The transfer unit 3
5 is transferred to the transfer paper. Transfer paper to which the toner image has been transferred
Is separated from the photosensitive drum 31 by the separation unit 36,
It is guided to a fixing unit 46 described later. The paper transport mechanism 4 is located below the copying machine main body 1a.
It is provided detachably at the position, and each
Equipped with multiple paper cassettes C for storing
And transfer the transfer paper one by one from the upstream side in the transport direction.
Paper feed rollers 411 and 412 to feed paper, and multi-feed of fed paper
Roller pairs 421 and 422 to prevent the
Pairs 431 to 434, registration roller pairs for secondary paper feeding
44. Also, in the downstream direction of the photosensitive drum 31
Is transported between a pair of rotating rollers 451 and 452.
Feed belt 45, fixing section 46, discharge roller pair 47, and
A paper discharge tray 48 is provided. Transport guide section 40
Is a discharge roller for discharging the sheet fed from the separation roller pair 42.
For transporting to the pair 47, facing each other with a required width
It is composed of arranged plate-like bodies. Bypass tray 4
9 enables manual setting of transfer paper of required size
The paper feed roller 413 and the separating roller pair 423
And merges with the transport guide section 40 on the downstream side.
I have. The fixing unit 46 is configured by an upper heat roller 461 and a lower pressure roller.
Roller 462, and the heat roller 461 is internally heated.
A pressure roller 462 is provided on the heat roller 461 side.
It is pressed with the necessary pressure. The paper cassette C or the manual feed tray 4
9 and fed out by paper feed rollers 411 to 413
The transfer paper passes through each pair of conveying rollers 431 to 434.
Then, the sheet is fed to the registration roller pair 44. Registrar
The transfer paper conveyed to the roller pair 44 is exposed to light by the optical mechanism 2.
The secondary paper is fed in synchronization with the start timing of the
5, the toner image is transferred. Transfer with transferred toner image
The paper is transported to a fixing unit 46 via a transport belt 45,
After the toner image is fixed on the transfer paper, the discharge roller pair 4
After that, the paper is discharged to a paper discharge tray 48. The reversing mechanism 5 includes a fixing unit 46 and a discharge roller pair.
47 in the middle of the transport guide section 40,
The transfer paper is moved around the horizontal axis 511 by the electromagnetic solenoid.
A rotation position for guiding the pair of discharge rollers 47 and both sides described later.
One that can be switched to the rotation position that leads to the direction of the unit section 6
With a direction switching plate 51,
Inverted oppositely arranged to guide the paper to the duplex unit 6
Conveyance row in the middle of paper guide 52 and reverse paper guide 52
At the downstream end of the pair of rollers 53 and the reversing paper guide 52.
And a pair of unloading rollers 54. Double-sided unit
The transfer paper whose direction has been switched to the printing unit 6 side is a reverse paper guide.
52, and is transported downward along the
Curve formed at the portion where the feed roller pair 53 is provided
The curl formed by the fixing portion 46 in the portion is corrected.
In a state where it is returned as straight as possible.
It is led to. The double-sided unit 6 copies both sides of the transfer paper.
And an intermediate portion having the unit body 60
It comprises a tray section 7 and a re-feeding mechanism 8. Middle
The tray 7 is provided with an intermediate tray on which the inverted transfer paper is placed.
A lay 71 is provided.
2. Nip roller 73, paper guide 74, and paper surface
Rotation that falls on its own weight and rotates with paper transport
A plate 75 is provided. The paper guide 74 is provided on the rotating plate 7.
5 is provided only in front of the mounting position, and is
To the rear with its own weight or a slight downward bias.
It is inclined and abutted on the intermediate tray 71, and
The transfer paper delivered from the delivery roller pair 54 is transferred to the intermediate tray 71.
On the surface of the transfer paper, and the leading edge of the transfer paper is
5 prevents stock mistakes. The re-feeding mechanism 8 is provided with
Plate-shaped formed below and opposed to each other with a predetermined interval
It has a re-feeding guide 81 made of
A little forward in the re-feeding direction of the tray 71,
Refeeding roller 82 provided with a part of its surface exposed, in front of it
One reversing roller 83, a pair of rotating rollers 841, 842
Stretched in between and in contact with the peripheral surface of the reversing roller 83
A separating belt 84 rotating in a direction opposite to the re-feeding direction, and
The re-feed guide section 81
And a pair of re-feed rollers 851 to 853.
You. Further, the rotating roller 841 of the separating belt 84 and the reversing roller
The paper nip position facing the roller 83 has flexibility.
Sheet body 86 hangs downward from unit body 60
And the lower end thereof is in contact with the reversing roller 83.
Have been killed. It should be noted that the double-sided unit 6 is provided in the copying machine main body 1.
a so that it can be pulled out forward from
At the loading position, feed the paper cassette C in front of the duplex unit.
The paper cassette slides from the side
It is also possible to have a three-stage configuration. In this case,
A portion corresponding to the paper roller 411 and the separating roller pair 421
Is configured as a feeding unit, and the paper cassette C
Be sure to load this feeding unit prior to insertion.
Just do it. From the unloading roller pair 54 onto the intermediate tray 71
When the transfer paper is sent, the beater 72 rotates and
Press the rear end of the transfer paper (the front end when re-feeding) from above.
The remaining curl is forcibly regulated straight,
In this state, the nip roller 73 rotates in the re-feed direction to transfer the transfer paper.
Up to the paper nip position between the reversing roller 83 and the sheet body 86
It is transported to secure the nip state and to align the front end. Transfer paper
The transfer state of the rotary plate 75 is not shown in FIG.
It is monitored by a rotary encoder and the like. In this state,
Feeding, that is, when there is an instruction to start the backside copying operation,
The paper roller 82, the reversing roller 83, and the separating belt 84
The rotation drive is started, and the sheet is
Repeat one sheet at a time from the lowest transfer paper by pressing
Out of the transport guide unit 40 through the re-feed guide unit 81.
The sheet is fed to the position where it joins,
33, on the photosensitive drum 31 by the registration roller pair 44
Be guided. The transfer paper with the toner image transferred to the back
The sheet is discharged to a sheet discharge tray 48 via a roller pair 47. FIG. 3 shows a cleaning device according to the present invention.
From the back side showing one embodiment of the applied main charging unit 32
FIG. 4 is a perspective view seen from FIG. 4, and FIG.
It is a perspective view. The main charging section 32 is a shield case 32
1. A charging wire stretched inside the shield case 321
322, the charging wire 322 in the shield case 321
To support at the starting point and the turning point
Provided with a first support portion 323 and a second support portion 324 made of
Reciprocates along the direction in which the charging wire 322 is stretched.
Cleaning device 320 provided to
Drive mechanism for reciprocating the cleaning device 320
325. The shield case 321 has a
Made of a long body such as stainless steel
The entire length of the shield case 321 extends on one side extending in the hand direction.
Long opening 321a is formed. Also shield
The bottom part of the case 321 (the ceiling part in FIG.
4) over substantially the entire length in the longitudinal direction as shown in FIG.
A long guide hole 321b is formed.
Guide rails 321c are formed on both sides in the width direction of 321b
Have been. And the cleaning device 320 is
Part of it is fitted into this long guide hole 321b,
Sliding contact movement while being guided by a pair of right guide rails 321c
It is possible to do. A first support is provided on one side of the shield case 321.
The tip of the portion 323 is fitted and fixed and the other side is
The distal end of the second support portion 324 is fitted and fixed to the second support portion 324. No.
1 support part 323 is formed in a box shape,
An opening for inserting a charging wire is provided on the surface facing
And the surface connected to the long opening 321a is open.
Have been. A charging wire is provided in the first support portion 323.
Stretching protruding piece 323a for stretching 322, and charging wire
322 is set within the shield case 321
Depth setting piece 323b is provided. Depth position
The setting piece 323b is more shielded than the extension projection piece 323a.
In the part approaching the base 321 side,
The height dimension is set to be large. Also Zhang
The projecting piece 323a is the inner wall surface of the depth position setting piece 323b.
Projecting into the first support portion 323 from the charging wire 3
The folded portion 22 can be stretched. Therefore, the second support portion 324 is pulled out from the second support portion 324 side.
The charged charging wire 322 through the depth position setting piece 323b.
And wrap it around the stretch projection 323a for half a turn and turn it back.
Further, the second support portion 32 is provided via the depth position setting piece 323b.
By leading in four directions, the charging wire 322 is folded back
Portion is locked to the extension projection 323a, and the depth position is set.
Stretching depth on the first support portion 323 side by the fixed piece 323b
Position is set. The second support portion 324 is connected to the first support portion 32.
3 and a charging wire 3
22, a fixed protruding piece 324 a for fixing one end, a charging wire
The other end of 322 is locked via a coil spring 324c.
Hook-shaped locking projection 324b and depth position setting piece 324
d is projected. The depth position setting piece 324d is
4a and the shield case 3 more than the coil spring 324c
21 and a fixed projection
Higher than the piece 324a and the locking projection 324b, and
The same height as the depth position setting piece 323b on the first support portion 323 side
Is set to Then, the charging wire 322 is
With one end fixed to the fixed projection 324a.
Introduced into the shield case 321 via the setting piece 324d
Then, the depth position setting piece 323b on the first support portion 323 side is
The half-wrapped stretch projection piece 323a is turned back and folded again.
Second support via each depth position setting piece 323b, 324d
The other end is connected to the coil spring 324c.
Is electrically attached as an open end
You. The charging wire 322 is connected to the shield case as described above.
321 in a state where the coil spring 3 is stretched in the longitudinal direction.
24c is set to be longer than the reference length,
The tension is maintained by the urging force of the coil spring 324c.
I am trying to be. Also, at the outer free end of the second support portion 324,
A terminal portion 324e provided with a connection terminal (not shown) protrudes inside.
Have been. The connection terminal is connected to the locking projection 324b.
The terminal 324e is connected to a high-voltage DC power supply.
As a result, a high voltage is applied to the charging wire 322.
I am trying to. The first support portion 323 has a bottom plate portion.
The plastic casing 326 is extended,
Cleaning device 320 to casing 326
A part of the drive mechanism 325 that moves within the door case 321
It is decorated. FIGS. 5 and 6 show the cleaning device 32.
FIG. 5 is a perspective view showing one embodiment of FIG.
Is in a standing posture (release position), and FIG.
Is in the inclined position (the cleaning position where the contact is made by pressing).
ing. As shown in these figures and FIG.
The device 320 includes a member main body 320a and the member main body 320a.
320a and an arm member 320d attached to the
Has been established. The member main body 320a is a shield
Projecting out of the long guide hole 321b of the case 321
Nut member 320b and the nut member 320b.
It is connected to the body and fits into the long guide hole 321b.
Arm support 320c. The nut member 320b has a spa
A screw hole 302c is provided to be screwed into the radial rod 325a.
And the arm support 320c has a width.
Sliding contact with a pair of left and right guide rails 321c on both sides in the direction
A pair of external fitting grooves 302d that are externally fitted in the
You. Each guide corresponding to the pair of outer fitting grooves 302d
The cleaning device 32 is fitted on the rail 321c.
0 is attached to the shield case 321 and
To rotate the spiral rod 325a forward and backward around the axis
As a result, the member body 320a is formed on the guide rail 321c.
Forward / reverse movement in the longitudinal direction of shield case 321 while being inside
I do. The arm member 320d (FIGS. 5 and 6)
Are provided on the support shaft 320e and the support shaft 320e.
From the pad support arm 320f and the claw piece 320g
Is formed. Pad support arm 320f is U-shaped
And both ends thereof are fixed to the support shaft 320e.
You. Also, the claw piece 320g is projected from the support shaft 320e.
Projected so that the direction is opposite to the pad support arm 320f
The direction is set. The support shaft 320e is connected to the arm support 3
The width of the part immersed in the shield case 321 of 20c
A pair of left and right bearings 321d protruding from both edges
It is supported. The bearing 321d has a smaller diameter than the shaft hole
And an insertion groove continuous with the shaft hole is provided.
Is press-fitted into this insertion groove and fitted inside the shaft hole.
I have. The arm member 320d is connected to the member body 3
20a, the pad support arm 32
0f is the two charging wires 32 in the shield case 321
2 and the arm member 320d
In the standing position, as shown in FIG.
The inner surface of the horizontal rod 302g of the holding arm 320f is
322 in a non-pressed or separated state (not pressed)
And in the state of the same inclination posture, as shown in FIG.
As shown, the horizontal rod 302g is pressed against the charging wire 322.
It comes in sliding contact with. Inner surface of horizontal rod 302g
The cleaning pad 3 so as to cross the charging wire 322.
20h is stuck. This cleaning pad 320h is
The charging wire 322 formed by a web of
Is cleaned by rubbing. In the pad support arm 320f, the horizontal
The rod 302g is configured to be detachable, and the pad support
Pressing the horizontal rod 302g into both arms of the arm 320f
The horizontal rod 302g and both arms are integrated by
Then, a force is applied to the horizontal rod 302g in a direction away from both arms.
Can remove the horizontal rod 302g.
As shown in FIG.
A stop recess is provided. On the other hand, the first support portion of the shield case 321
At the bottom on the side of the H.323 side, the width is sandwiched by the long guide hole 321b.
A pair of contact release holes 320i is formed in the direction
Of the first supporting portion 323 (the storage position
The arm member 320d with the claw pieces 320g
It fits into each contact release hole 320i,
As shown in FIG. 5, the arm member 320d is in the upright posture.
I'm trying to get. When the cleaning device 320 is in the storage position,
When shifting from the cleaning position to the cleaning position, the claw pieces 320g
It comes out of the hole 320i, and the tip
The pad support arm is brought into contact with the bottom of
320f rotates clockwise around the support shaft 320e,
Thereby, the arm member 320d is set to the inclined posture.
I have to. Therefore, the arm member 320d is in the storage position.
The cleaning pad 320 is moved away from the cleaning position to the cleaning position.
h is in a state of pressing the charging wire 322,
When the arm member 320d returns to the storage position, the cleaning
The pressing state of the pad 320h against the charging wire 322 is released.
Will be excluded. The drive mechanism 325 includes a shield case 321
Spies arranged to extend longitudinally outside the bottom of the
Ralrod 325a is installed in the casing 326.
Drive motor 325b, drive of this drive motor 325b
A worm gear 325c attached to the shaft,
Spiral rod 32 pulled into thing 326
5a and at the end of the worm gear 325
and a pinion 325d that meshes with the pinion c. The spiral rod 325a is a shield case.
Long guide holes 3 on both sides of the base 321 in the longitudinal direction.
A pair of brackets 32 projecting outward from 21b
1e so as to be rotatable around the axis, and
Screwing into the screw hole 302c of the
You. Therefore, when the drive motor 325b is driven forward / reversely,
Therefore, this driving force is generated by the worm gear 325c and the pinion
Transmitted to the spiral rod 325a through the
And the forward and reverse rotation of the spiral rod 325a
The cleaning device 320 guides the guide rail 321c.
It is moved forward and backward while being performed. The spiral rod 32
5a includes a cleaning device 320 and a bracket 32.
1e, a coil spring 320j is fitted thereinto.
Therefore, the nut member 320b collides with the bracket 321e.
By doing so, the impact received is cushioned. FIG. 7 shows a cleaning device for the main charging section 32.
FIG. 129 is an explanatory diagram for explaining the operation of S320.
The state where the cleaning device 320 is in the storage position, (b)
Indicates that the cleaning device 320 is in the cleaning position.
Each is shown. First, in FIG.
The 20d claw piece 320g fits into the contact release hole 320i.
This allows the pad support arm 320f to be in the upright posture.
The charging wire 3 of the cleaning pad 320h
22 has been released,
The wire 322 is connected to the edge of the depth position setting piece 323b (FIG. 3).
Portion, and thereby the extension depth of the charging wire 322
The position is constant. Next, the drive motor 325b is driven to drive the spa
By rotating the iral rod 325a in a predetermined direction,
To move the cleaning device 320
The cleaning device 320 is located at the cleaning position as shown in FIG.
Move to The arm member 320d has moved to the cleaning position.
In the state, the claw piece 320g comes out of the contact release hole 320i.
And its tip is the bottom plate of the shield case 321 (guide
And the support shaft 32
Rotated clockwise by a predetermined angle around 0e
Due to the rotation, the pad support arm 3
20f also rotates in the same direction, and the cleaning pad 320h
The ear 322 is pressed. Therefore, this
To continue the movement of the cleaning device 320 in the state
Thus, the charging wire 322 is moved by the cleaning pad 320h.
Wipe off, remove attached particles and clean
Be converted to Then, the cleaning device 320
And then return it to the storage position.
The arm member 320d is, as shown in FIG.
The standing posture is set again, and the charging wire 322 is moved to a predetermined depth.
The installed state of the device returns to the recovered state. The main charging section 32 cleans the charging wire 322.
Sometimes the cleaning pad 320h of the cleaning device 320
It slides and moves in a pressed state against the charging wire 322.
And the charging wire 322 is reliably cleaned.
When the cleaning device 320 is in the storage position,
Pressing contact of pad 320h against charging wire 322
State is released, the charging wire 322
When a high voltage is applied to the
Therefore, during the discharge, the charging wire 322 and the photoconductor drum are discharged.
It can always be kept parallel to the ram 31 (Fig. 2).
Function, and is uniform over the width direction of the surface of the photosensitive drum 31.
Because it is possible to perform uniform charging, the transfer image
Quality can be kept constant. The present invention is limited to the above embodiment.
Rather than the following. (1) In the above embodiment, the
320g of the nailing device 320 is released from contact at the storage position
By being fitted into the hole 320i, it becomes a standing posture,
Cleaning position at which piece 320g comes out of contact release hole 320i
In the installation, the tip of the claw piece 320g is
1c so that it is in an inclined posture
However, instead of this, the urging force of the urging means
The cleaning pad 320h constantly presses the charging wire 322
So that the cleaning device 320 is in the storage position.
When the claw piece 320g abuts the stopper in the
The support arm 320f stands up and the cleaning pad 320h
The state of pressing and sliding contact with the charging wire 322 is released.
You may do it. (2) In the above embodiment, the seal
Contact release hole only on the first support portion 323 side of the door case 321
Although the storage position provided with 320i is set, the second support
By providing a contact release hole on the holding part 324 side,
May be set. By doing so, the cleaning package
The setting of the number of times of wiping of the charging wire 322 by the
The degree of freedom increases. (3) Instead of the contact release hole 320i,
The portion may have a concave (groove) shape. (4) A notch formed as a long guide hole 321b is formed.
Instead of forming it inside the bottom of the shield case 321
Lay guide rails, etc.
Reciprocatingly cleanable (using Lal rod and wire)
The storage device 320 may be provided internally. Or a similar structure
The component may be provided on the side surface of the shield case 321. (5) In this embodiment, the release posture and the pressing contact
Tactile posture achieved by so-called rotation or swing
However, the present invention is not limited to this.
In the plane perpendicular to the direction in which the used or charged wire is stretched
The method of realizing the release posture by tilting with
Can also be adopted. (6) In this embodiment, the cleaning device
Although 320 has been described as being applied to the main charger 32, other
Applicable to chargers such as transfer chargers and separation chargers
It is. [0052] According to the first aspect of the present invention, the cleaning member is provided.
Do not press the cleaning position where the
To the release position.
Main body that can be moved along the direction in which the charging wire is stretched
And that the main body was located at one end of the charging wire
The cleaning member from the cleaning position to the release position.
Since it is configured to have a position switching means for switching,
At the position, the charging wire and the cleaning member slide
Can be removed, and at the release position,
Releases the pressing contact state of the wire and restores the charged wire to the stretched state
After cleaning, the charged wire is exposed to light.
Can always be kept parallel to the body drum,
Charges can be uniformly supplied to the photosensitive drum in the width direction,
Image quality can be maintained. [0053]AlsoThe main body along the direction in which the charging wire is stretched.
Drive means for moving from one side end to the other end
Configuration, the cleaning member automatically cleans the charged wire.
It can be done dynamically. [0054]In addition,Switching means,The above shield
On one side of theProvided charging tab
Cleaning padContactReleaseReleaseHoleInComplete
When the main unit returns to one end of the shield case
ObiElectric wireOriginalCan be restored to the stretched state
You.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall perspective view showing an embodiment of a copying machine to which a charging wire cleaning device according to the present invention is applied. FIG. 2 is an internal configuration diagram of the copying machine shown in FIG. FIG. 3 is a perspective view, viewed from the back side, of an embodiment of the main charging unit to which the charging wire cleaning device according to the present invention is applied. FIG. 4 is a partially enlarged perspective view taken along line A of FIG. 3; FIG. 5 is a perspective view showing an embodiment of the cleaning device, and shows a state in which an arm member is in an upright posture. FIG. 6 is a perspective view showing an embodiment of the cleaning device, and shows a state where the arm member is in an inclined posture. FIGS. 7A and 7B are explanatory diagrams for explaining the operation of the cleaning device for the main charging unit, wherein FIG. 7A shows a state in which the cleaning device is at the storage position, and FIG. ing. DESCRIPTION OF SYMBOLS 1 Copier 3 Image forming unit 31 Photoreceptor drum 32 Main charging unit 320 Cleaning device 320a Member body 320b Nut member 320c Arm support 320d Arm member 320e Support shaft 320f Pad support arm 320g Nail piece 320h Cleaning pad 320i Contact release hole 320j Coil spring 3
21 Shield case 321a Long opening 321b Long guide hole 321c Guide rail 321d Bearing 321e Bracket 322 Charging wire 323 First supporting portion 324 Second supporting portion 323a Stretching protruding piece 323b Depth position setting piece 324 Second supporting part 325 Drive Mechanism 325a Spiral rod 325b Drive motor 325c Worm gear 325d Pinion

Continuation of front page (72) Inventor Norimasa Kishigami 1-2-28 Tamazo, Chuo-ku, Osaka-shi Inside Mita Industries Co., Ltd. (56) References JP-A-6-266210 (JP, A) JP-A-7-261520 ( JP, A) JP-A-7-121015 (JP, A) JP-A-5-11574 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03G 15/02 G03G 15/16 102

Claims (1)

(57) release without pushing a RuKiyoshi <br/> sweep position to pressure contact against the stretched the charging wire between both sides Claims A 1. A cleaning member in the longitudinal direction of the shield case The main body portion is supported so as to be switchable to a position, and is movable along the direction in which the charging wire is stretched. When the main body portion is located at one end of the charging wire, the cleaning member is connected to the main body. Position switching means for switching from the cleaning position to the release position, and the main body
From the one end to the other end along the stretching direction of the charging wire.
Drive means for moving the cleaning member up to
With the wire pressed against the wire,
Cleaning the charged wire by moving it along
In the cleaning device for a charging wire, the main body is rotated in a direction perpendicular to the direction in which the charging wire is stretched.
The moving shaft and the rotating shaft in the radial direction toward the charging wire.
A pair of support members in the width direction for supporting the protruding cleaning member.
Arm, a horizontal rod erected between these support arms,
A claw protruding from the rotation shaft on the opposite side to the support arm;
It is configured with, the cleaning member is opposite to the charging wire of the horizontal rod
Surface and the main unit is set to the cleaning position.
In contact with the charging wire while the main unit is in the release position.
One in which the contact with the charging wire is released in the set state
The position switching means is a shield pad with which the claw abuts.
Of the shield case
Is located in the area, the claws fit into the
A charging wire cleaning device, characterized in that it has a release hole for releasing contact of the cleaning pad with the charging wire .