JPH08211678A - Image forming device - Google Patents

Abstract

PURPOSE: To prevent a protection paper from being idly rotated with respect to a photoreceptor and to surely eliminate it by giving electric charge to the protection paper and electrostatically attracting the protection paper and the photoreceptor. CONSTITUTION: The photoreceptor 6 is rotated in a direction shown by an arrow and the electric charge is imparted to the photoreceptor protection paper 62 by at least one among devices of an electric charge imparting means (a charge device 19, a transfer device 18 and a discharge device 77). Then, the charge device 19 is controlled in the same way as that at an ordinary image forming time. In such a way, the electric charge is imparted to the paper 62 and the paper 62 is attracted and fixed to the photoreceptor 6 by static electricity. Besides, the paper 62 rotated together with the photoreceptor 6. When the winding start edge of the paper 62 arrives at a peeling means 61 abutting on the photoreceptor 6, it gets on the peeling means 61 and the adhesive part of the paper 62 is peeled by the peeling means 61. Besides, it is automatically ejected to the outside of a machine. Therefore, the idle rotation of the photoreceptor and such possibility that the surface of the photoreceptor is damaged by the peeling means 61 are eliminated.

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 for removing a protective sheet in an image forming apparatus, that is, for automatically removing and ejecting the protective sheet from the surface of a photoconductor.

[0002]

2. Description of the Related Art As the prior art, Japanese Patent Laid-Open No. 61-2237
As disclosed in Japanese Unexamined Patent Publication No. 72-72, there is a method in which after mounting the photoconductor, a separation claw is pressed against the protective paper of the photoconductor to peel it off.

Explaining with reference to FIG. 21, a photoconductor 135 having a non-translucent protective sheet 132 is mounted in the body, and a peeling claw 131 is removed by turning on a service switch provided in the main body. Is rotated from the broken line state to the solid line state, the tip end portion thereof comes into contact with the surface of the protective sheet 132, and the photosensitive member 135 rotates clockwise, whereby the side end portion 133 of the stainless plate 133 is rotated.
a engages the peeling claw 131, is peeled off from the other end 133b, and is discharged to the outside of the machine body.

Incidentally, 134 is a felt, the protective sheet 132 is opaque, and this felt is polymer-bonded to the upper surface of the stainless steel plate 133 as a base material.

[0005]

In the above method, since there is no means for fixing the protective sheet 132 to the photoconductor 135, when the peeling claw 131 comes into contact with the protective sheet 132,
The protective sheet 132 and the photoconductor 135 may rotate idly.

Further, the peeling claw 131 may rub the adhesive, the adhesive may adhere to the peeling claw 131, or the peeling claw 131 may enter between the peeling claw 131 and the photoconductor 135 to damage the photoconductor 135. Furthermore, since the peeling claw 131 remains in contact with the photoconductor 135 until the protective sheet 132 has been peeled off, the peeling claw 131 strongly presses the photoconductor 135 due to the peeling force, which may damage the surface of the photoconductor 135. is there.

[0007]

According to a first aspect of the present invention, there is provided an image forming apparatus including a photoconductor which can be mounted on the image forming apparatus together with a protective paper for covering and protecting the photoconductor, and the protective paper being removed from the photoconductor. In an image forming apparatus including a removing unit and a charge applying unit provided around the photoconductor, the removing unit applies the protective paper electrostatically to the photoconductor by the charge applying unit. The image forming apparatus is characterized in that the protective paper is peeled off from the photoconductor.

An image forming apparatus according to a second aspect of the present invention is the image forming apparatus according to the first aspect, characterized in that means for removing the charge of the protective paper peeled off by the removing means is provided in the paper conveying path.

According to the third aspect of the present invention, in the image forming apparatus, the photosensitive member is wound around the photosensitive member and can be mounted in the image forming apparatus together with the protective paper that holds the wound state by the adhesive portion. In an image forming apparatus having a peeling unit for peeling from a photoconductor, the position of the peeling unit and the position of the adhesive portion are different from each other in the axial direction of the photoconductor. It is a device.

According to a fourth aspect of the present invention, in the image forming apparatus, a plurality of adhesive portions of the protective paper are provided, and the plurality of adhesive portions extend from the upstream side to the downstream side in the rotation direction of the photosensitive body to the photosensitive body. The image forming apparatus according to claim 3, wherein the image forming apparatus is provided so as to be shifted from the central portion to the side end portion with respect to the axial direction.

An image forming apparatus according to a fifth aspect of the present invention is characterized in that the peeling means is separated from the photoconductor between the winding start end of the protective paper and the adhesive portion of the protective paper. The image forming apparatus according to claim 3.

[0012]

According to the structure of the present invention, the charge is given to the protective paper by the charge giving means, and the protective paper and the photoconductor are electrostatically adsorbed, so that the protective paper is prevented from idling. Thus, even if the protective paper is not fixed in the circumferential direction of the photoconductor, the protective paper can be reliably removed.

According to the second aspect of the present invention, since the electric charge remaining on the protective paper is removed by the neutralizing means, the protective paper is not electrostatically adsorbed in the conveying path.

According to the third aspect of the present invention, since the protective paper peeling means and the adhesive portion of the protective paper are located at mutually different positions in the axial direction of the photoconductor, the adhesive material of the adhesive portion adheres to the peeling means. And does not get between the peeling claw and the photoconductor.

According to the fourth aspect of the present invention, since the position of the adhesive portion of the protective paper is provided so as to be displaced in both the axial direction and the rotation direction of the photoconductor, a large force does not act on the peeling means for peeling the adhesive portion. .

According to the fifth aspect of the invention, the peeling means is located at a position separated from the photoconductor between the winding start end of the protective paper and the adhesive portion, so that the peeling means can be removed when the protective paper is peeled off. Eliminates the pressure applied to the photoconductor.

[0017]

【Example】

(Embodiment 1) An embodiment of the present invention will be described with reference to FIGS. 1 to 6 and 9.

FIG. 1 shows a sectional structure of the image forming apparatus according to the present embodiment. After the original cover 21 is closed on the original placed on the original placing table 1 made of transparent hard glass. When the operator presses the print switch arranged on the operation panel 4, the copying machine main body starts the copying operation. When the copying operation is started, the document on the document table 1 is illuminated by an illumination lamp arranged inside the illumination lamp unit 22, and the reflected light is reflected by the first mirror 23 and the mirror base unit B3 in the mirror base unit A2.
The photoconductor 6 rotatably attached is irradiated via the second mirror 24, the third mirror 25, the lens 26, the fourth mirror 28, the fifth mirror 29, and the sixth mirror 30 therein.
Mirror base unit A2 and mirror base unit B
3 makes a reciprocating motion, and the photoconductor 6 rotates in the direction of the arrow in the figure to scan the document. During this time, the copy sheet 7 is picked up by the sheet feeding / introducing roller 8 and conveyed by the conveying rollers 13 and 12. Since the transport roller 9 is stopped at the time when it passes the transport roller 12, the copy sheet is temporarily stopped. At this time, if the copy sheet 7 is not detected by the sheet detection sensor 10, it is determined that copy sheet JAM has occurred and the copying machine main body is stopped. When the sheet detection sensor 10 detects the copy sheet 7, the conveyance roller 9 is started in synchronization with the timing of scanning the original on the original table 1.

On the other hand, on the photoconductor, the photoconductor 6 is uniformly charged by the corona discharge of the charger 19, and thereafter, the reflected light from the original document is received and an electrostatic latent image is formed on the photoconductor 6. This electrostatic latent image is visualized by the developing tank 5, and the image is transferred to the copy paper 7 by the transfer device 18. The developer remaining on the photoconductor is cleaned by the cleaner 16, and the charge on the photoconductor 6 is removed by the exposure from the charge removing unit 17. The copy paper 7 on which the image has been transferred by the transfer device 18 is peeled off by the peeling claw 61 which is arranged so as to be able to come into contact with and separate from the photoconductor 6, and is fixed on the copy paper by the fixing section 15 to be outside the copying machine main body. Is discharged.

In the above copying machine, the life of the photoconductor 6 is usually much shorter than that of the body of the copying machine, and the photoconductor 6 needs to be replaced regularly. This photoconductor replacement is conventionally performed by a service person, and when the photoconductor reaches the end of its life, a counter built in the main body of the copying machine
The life of the photoconductor is detected, and a serviceman call warning is issued on the operation panel of the copier body. At this point, the user calls a service person and requests replacement of the photoconductor. When exchanging the photoconductor, the serviceman also clears the counter that counts the life of the photoconductor.

The present invention is particularly effective when the user replaces the photoconductor 6 by the service person. However, it is difficult to handle the photoconductor 6, and if it is touched with a hand or touched with a hard object, the photoconductor 6 will be damaged. For this reason, in order for the user to replace the photoconductor 6, it is necessary to wind the protective paper around the photoconductor 6 so that the user does not touch it directly. If the user peels off the protective paper and then sets the photoconductor 6 on the main body, the user may accidentally damage the photoconductor 6, so the protective paper should be removed from the photoconductor. It is necessary to automatically eject after setting it in the main body.

FIG. 2 is a diagram showing an arrangement relationship of parts around the photoconductor of the image forming apparatus according to the present embodiment. The manner of peeling and removing the photoconductor protective paper 62 will be described with reference to this drawing.

First, the mounting of the photoconductor 6 in the main body will be described. Before the photoconductor 6 is inserted, the peeling claw 61 is separated to a position 61 'shown by a broken line in FIG.
2 is inserted while sliding the photoconductor 6 with the wound 2 from the front side of the paper surface of FIG. Then, when the user presses the copy button, the photoconductor 6 rotates in the direction of the arrow, and at least one of the charge imparting means (charging device 19, transfer device 18, charge removing device 77) causes the photoconductor protective paper 62 to be rotated. Is given an electric charge.

Here, an embodiment in the case of applying the electric charge by using the charging device 19 will be described with reference to FIG. This figure is a block diagram of a main part of an image forming apparatus provided with a charging device 19. The charging device 19 including the grid member 84 is arranged so as to face the photoconductor 6, and the supply of power from the high voltage power supply circuit for the corona wire and the power supply circuit for the grid is controlled by the control circuit.

In the case of the present invention, the charging device 19 is controlled in the same manner as during normal image formation. That is, DC-6.5KV for corona wire and 600V ± 2% for grid.
Is applied, the current value flowing at this time is 400 μA
The output value of the high-voltage power supply circuit is controlled by the control circuit so that the constant current becomes ± 10 μA.

In this way, an electric charge is applied to the photoconductor protective paper 62, and the photoconductor protective paper 62 is attracted and fixed to the photoconductor 6 by electrostatic force, and rotates together with the photoconductor 6. The peeling means 61 in which the winding start end of the protective paper 62 is in contact with the photoconductor 6
At the end, the winding start end rides on the peeling means 61, the adhesive portion 78 of the protective paper is peeled off by the peeling means 61, and the protective paper 62 is peeled off to the winding end end as the photoconductor 6 rotates. It is automatically discharged to the outside of the machine by the means.

As described above, by applying the electric charge to the protective paper by the electric charge applying means, the protective paper can be surely discharged without causing the photoconductor 6 and the protective paper 62 to idle. Further, a charge eliminating means is provided in the paper conveying path downstream of the photoconductor 6 to eliminate the electric charge remaining on the photoconductor protection paper. In the present embodiment, the charge eliminating means for copy paper shown at 77 in FIG. An example will be described where is used as a charge eliminating unit for the photoconductor protection paper.

FIG. 4 shows a block diagram, FIG. 5 shows a flowchart, and FIG. 6 shows a time chart. Simultaneously with the start of the machine, the charging device 19 starts the charging, and the discharging means 77 shown in FIG. 4 simultaneously starts the discharging (S1). The control of the static eliminator 77 at this time is
As with the static elimination of copy paper, AC is
It is controlled by the controller so that a constant voltage of 1 KHz and +3.5 KV is applied.

In this way, the charging device 19 to the static eliminator 77 are removed.
In the meantime, the photoconductor protective paper 62 is electrostatically adsorbed to the photoconductor 6, the photoconductor 6 and the protective paper 62 rotate to the position of the peeling means 61 without idling, and the protective paper 62 is removed by the peeling means 61. The charges that have been peeled off from the photoconductor 6 and supplied to the charge eliminating portion and remaining on the protective paper 62 are eliminated by the charge eliminating device 77, and it is possible to prevent JAM that is generated by being adsorbed by the downstream conveying means. The tip of the protective paper 62 is the discharge sensor 8
If the paper discharge sensor 85 does not turn on after the longest time to reach 5 [(perimeter of the photoconductor 6 + distance from the peeling position to the paper discharge sensor 85) / paper transport speed], it is a protection paper JAM and JAM is displayed. To stop the main body (S2-S4).

When the paper ejection sensor 85 is turned on, the paper ejection sensor is further passed after the time [the length of the protection paper 62 in the conveyance direction / the paper conveyance speed] elapses until the rear end of the protection paper 62 passes the paper ejection sensor 85. If 85 is not turned off, it is the protection paper JAM, JAM is displayed and the main body is stopped (S5-S
7).

When the paper discharge sensor 85 is turned off, the protective paper 62 has been normally discharged to the outside of the main body, the charging / discharging is stopped, and the main body becomes ready (S8-S9).

(Embodiment 2) Another embodiment of the present invention will be described with reference to FIG. FIG. 7 shows the positional relationship between the adhesive portion of the protective paper and the peeling claw in this embodiment.

The process of peeling off the photoconductor protective paper 62 from the photoconductor 6 is the same as in the first embodiment.

In the present embodiment, the conventional protective paper adhesive portion 79 extends over the entire area of the photosensitive member 6 in the axial direction.
Like the adhesive portion 78 of the protective paper of this embodiment, the spot adhesive is used and the positions of the adhesive portion 78 and the peeling claw 61 are different from each other in the axial direction of the photoconductor.
Of the photosensitive member 6 caused by the adhesive of the other side being adhered to the separating claw 61 or entering between the separating claw 61 and the photosensitive member 6.
It is possible to prevent scratches and defective images.

(Embodiment 3) Another embodiment of the present invention is shown in FIG.
This will be described with reference to FIG. 8 and 9 show the positional relationship between the adhesive portion of the protective paper and the peeling claw in this embodiment.

In the second embodiment, the adhesive portion 7 of the protective paper 62 is used.
8 is a plurality (FIG. 8), among the plurality of adhesive parts 78,
The peeling claw 61 is arranged at a position closer to the center of the photoconductor 6 in the axial direction with respect to the adhesive portion 78a located on the most side end portion in the axial direction of the photoconductor 6, or the protective paper 6 is provided.
In the case where the second adhesive portion 78 is at one location (FIG. 9), the adhesive portion 7
By disposing the position of the peeling claw 61 with respect to 8 on both sides in the axial direction of the photoconductor 6, the peeling force of the peeling means 61 is effectively applied to the protective paper 62, and the protective paper 62 is protected.
JAM caused by peeling mistake of the paper or reversing of the protective paper 62
Can be prevented. (Embodiment 4) Another embodiment of the present invention is shown in FIG.
A description will be given based on (B). FIGS. 10A and 10B respectively show the positional relationship between the adhesive portion of the protective paper and the peeling claw.

In the third embodiment, a plurality of adhesive parts 78 are
As shown in (A) and (B) of the drawing, when the peeling claw 61 peels off the adhesive portion 78 at the same time by arranging them in a mutually offset manner with respect to the axial direction of the photoconductor 6 and the winding direction of the protective paper. Since it is not necessary to peel off all the adhesive portions, the reaction force from the protective paper 62 applied to the peeling claw 61 can be reduced, and the peeling claw and the peeling claw driving means can be downsized.

(Embodiment 5) Another embodiment of the present invention is shown in FIG.
1, it demonstrates based on FIG. FIG. 11 shows the positional relationship between the protective paper and the peeling claw, and FIG. 12 is a diagram showing the peeling state.

In the fourth embodiment, the plurality of adhesive portions of the protective paper are arranged so as to be positioned on the upstream side in the rotation direction of the photosensitive member from the center to the side portions, so that the adhesive portions 78 are surely dispersed. Can be peeled off.

In the case of the arrangement as shown in FIGS. 10 (A) and 10 (B) of the fourth embodiment, since the interval l of the adhesive portion 78 to be peeled off first is wide, the peeling claw 61 works effectively. Therefore, the first adhesive portion may be peeled off at the same time as the adhesive portion to be peeled next, and a large load may be applied to the peeling means 61 (see FIG. 12). However, in the case of the arrangement as in the present embodiment, it is possible to surely peel off in order without applying force to the next adhesive portion until the first adhesive portion is peeled off. It has a great effect.

(Embodiment 6) Another embodiment of the present invention is shown in FIG.
It will be described based on. FIG. 13 is a diagram showing the positional relationship between the photoconductor and the conveying means at the next stage.

Generally, the distance L from the photoconductor 6 to the conveying means of the next stage is set to be slightly shorter than the minimum conveying paper size (for example, 148 mm for postcard).
When a small-diameter photoconductor with a diameter of about 30 mm is used as in this embodiment, the circumference length of the photoconductor is about 95 mm, which is about 50 mm shorter than the postcard size. The length of the protective paper 62 wrapped around the photosensitive member 6
If you set the length enough to cover the surface of
The protective paper 62 does not reach the next-stage transporting means and is not discharged outside the machine body.

Therefore, in this embodiment, the protective paper 62 is used.
By setting the minimum winding length to be at least the length L from the photoconductor to the conveying means of the next stage, the protective paper reaches the conveying means of the next stage (fixing section 15 of FIG. 1 in this embodiment),
The protective paper is discharged to the outside of the machine by this transporting means.

(Embodiment 7) Another embodiment of the present invention is shown in FIG.
A description will be given based on (A) and (B). FIG. 14A shows a front view of the protective paper, and FIG. 14B shows a front view when the protective paper shown in FIG.

In the second embodiment, the protective paper having a shape obtained by cutting the protective paper outside the outermost end of the adhesive portion 78 of the protective paper is used. At this time, the length other than the cut portion is set to πd or more, where d is the diameter of the photoconductor 6 so that the surface of the photoconductor 6 is not exposed.

By cutting the end on the protective paper side, even if the adhesive portion 78 is located at one place in the central portion, it is possible to prevent the arrow portion in the drawing from rising, so that the winding start end of the protective paper is It is possible to prevent the developer from being scraped off from the developing roller of the developing device and from being damaged by coming into contact with the cleaning blade of the cleaning device, the toner receiving seal, or the grid of the charger.

(Embodiment 8) Another embodiment of the present invention is shown in FIG.
A description will be given based on (A) and (B). FIG. 15A shows a front view of the protective paper, and FIG. 14B shows a sectional view when the protective paper shown in FIG.

In Example 7, the adhesive portion 78 of the protective paper is slit in the protective paper, hooked and fixed, and the adhesive is abolished.

The protective paper 62 is provided with slits a and b, and the distance between them is πd (d = photoconductor diameter). After the protective paper 62 is wound around the photoconductor 6, the slit a
By passing through the slit b, the protective paper is fixed by itself in a state of being wrapped around the photoconductor, and an adhesive is not used. Therefore, the fixing unit can be heated even while the protective paper is being discharged, and the ready time can be shortened. Further, it is not necessary to wait for the fixing unit to be cooled until the photoconductor is replaced.

(Embodiment 9) Another embodiment of the present invention is shown in FIG.
It will be described based on. FIG. 16 is a diagram showing the positional relationship between the ironing member and the solenoid.

Reference numeral 80 is an ironing member (roller, belt, etc.), 81 is a spring for holding the ironing member in the retracted position, and 82 is a solenoid for moving the ironing member to a predetermined position near the peeling claw 61.

When removing the protective paper, the mark (not shown) printed on the protective paper 62 is read by a sensor (not shown), and the winding start end of the protective paper 62 is detected. Protective paper 6
The solenoid 82 is turned on at the timing when the winding start end of 2 reaches the position of the peeling claw 61, the squeezing member 80 is held at a predetermined squeezing position, and the protective paper 62 is squeezed. After a predetermined time,
When the protective paper 62 is completely peeled off, the solenoid 82 is turned off.
Then, the ironing member 80 moves to the retracted position.

As described above, by squeezing the protective paper 62 with the squeezing member 80, the curl on the protective paper can be removed, and the protective paper can be prevented from being jammed in the conveying path downstream of the photosensitive member.

(Embodiment 10) Another embodiment of the present invention is shown in FIG.
It will be described based on 7. FIG. 17 shows a sectional view of the protective paper and the photoconductor.

When the surface of the protective paper 62 in contact with the photoreceptor is a and the opposite surface is b, the adhesive force between a and the adhesive is F ₁ , and the adhesive force between b and the adhesive is F ₂ . The surface roughness of a> the surface roughness of b is set so that F ₁ > F ₂ .

At this time, when the adhesive portion 78 is peeled off by the peeling claw, F ₁ > F ₂ , so that peeling does not occur at a ′ in FIG. For this reason, the adhesive remains on the surface a of the protective paper (becomes the upper surface of the protective paper at the time of transportation), so that the adhesive can be prevented from dropping onto the transfer means or adhering to the transportation means.

(Embodiment 11) Another embodiment of the present invention is shown in FIG.
8 (A) and (B). FIG. 18A is a diagram showing the positional relationship between the photoconductor, the protective paper, and the peeling claw, and FIG. 18B is a view seen from the arrow P of FIG.

In Example 1, the winding start end a of the protective paper
However, when it comes to the tip position of the peeling claw 61, the claw lever 83 moves to the position when the claws are separated, as shown in the figure, and the peeling claw 61 moves.
Moves to a position 61 'indicated by a broken line and separates from the photoconductor 6. Therefore, the peeling force of the protective paper 62 acts only on the peeling claw 61 and does not act on the photoconductor, so that the surface of the photoconductor 6 can be prevented from being damaged.

(Embodiment 12) Another embodiment of the present invention is shown in FIG.
9 and FIG. 20 will be described. FIG. 19 is a diagram showing the positional relationship among the photoconductor, the protective paper, the peeling claw, and the sensor.
0 is a diagram showing the timing of separation of the peeling claw from the photoconductor.

In the eleventh embodiment, a mark 63 on the protective paper 62 is further added, and the mark 63 can be read by the reading sensor 20 to determine the separation timing of the peeling claw 61.

The distance between the tip of the peeling claw 61 and the adhesive portion 78 at the moment when the reading sensor 20 reads the mark 63 is L ₁
(However, L ₁ > 0: the state where the tip of the peeling claw 61 does not reach the adhesion portion 78), the distance between the tip of the peeling claw 61 and the winding start end of the protective paper 62 is L ₂ (at this time, L ₂ When ≧ 0: That is, the winding start end of the protective paper 62 does not reach the tip of the peeling claw 61, and when L ₂ <0: That is, when the winding start end of the protective paper 62 passes the tip of the peeling claw 61. The state is divided into two states, that is, the state where L ₂ ≧ 0 (when L ₁ > L ₂ ). The peeling claw 61 is L ₂ / v time after the sensor 20 detects the mark 63. Evacuate from (v = photoconductor speed) to L ₁ / v hours later.

Retraction timing when L ₂ <0 The peeling claw 61 retracts from the moment when the sensor 20 detects the mark 63 to after L ₁ / v time.

As shown in FIG. 20, since the retraction timing of the peeling claw is determined by the information from the protective paper to be peeled, the timing is not missed.

[0064]

According to the first aspect of the present invention, since the electric charge is applied to the protective paper by the charge giving means and the protective paper and the photoconductor are electrostatically adsorbed, the idling of the protective paper with respect to the photoconductor is prevented. Therefore, even if the protective paper is not fixed in the circumferential direction of the photoconductor, the protective paper can be reliably removed. Therefore, the extra portion of the protective paper is unnecessary, the number of the protective papers taken can be increased, and the cost can be reduced.

According to the second aspect of the present invention, since the electric charge remaining on the protective paper is removed by the neutralizing means, the protective paper is not electrostatically adsorbed in the conveying path. for that reason,
It is possible to prevent the occurrence of jams in the transport path.

According to the third aspect of the present invention, since the protective paper peeling means and the adhesive portion of the protective paper are located at mutually different positions in the axial direction of the photoconductor, the adhesive material of the adhesive portion adheres to the peeling means. And does not get between the peeling claw and the photoconductor. Therefore, it is possible to prevent the photoreceptor from being scratched or having an image defect.

According to the fourth aspect of the invention, since the position of the adhesive portion of the protective paper is provided so as to be displaced in both the axial direction and the rotation direction of the photoconductor, a large force does not act on the peeling means for peeling the adhesive portion. . Therefore, the peeling means and the driving means of the peeling means can be made small.

According to the fifth aspect of the present invention, the peeling means is located at a position separated from the photoconductor between the winding start end of the protective paper and the adhesive portion, so that the peeling means can be removed when the protective paper is peeled off. Eliminates the pressure applied to the photoconductor. Therefore, it is possible to prevent the surface of the photoconductor from being damaged.

[Brief description of drawings]

FIG. 1 is a sectional view of an image forming apparatus according to the present invention.

FIG. 2 is a diagram showing a positional relationship between a photoconductor, a peeling claw, and a charge giving unit in an example of the present invention.

FIG. 3 is a block diagram of a charging device according to an exemplary embodiment of the present invention.

FIG. 4 is a block diagram of a static eliminator according to an embodiment of the present invention.

FIG. 5 is a flowchart showing an operation in the embodiment of the present invention.

FIG. 6 is a time chart of each charging / discharging device in the embodiment of the present invention.

FIG. 7 is a diagram showing a positional relationship between an adhesive portion and a peeling claw of protective paper according to another embodiment of the present invention.

FIG. 8 is a diagram showing another positional relationship between the adhesive portion of the protective paper and the peeling claw.

FIG. 9 is a diagram showing another positional relationship between the adhesive portion of the protective paper and the peeling claw.

FIG. 10A is a diagram showing another arrangement relationship between the adhesive portion of the protective paper and the peeling claw. (B) It is a figure showing the arrangement | positioning relationship different from (A).

FIG. 11 is a diagram showing another arrangement relationship between the adhesive portion of the protective paper and the peeling claw.

FIG. 12 is a diagram showing a state of peeling in another example of the present invention.

FIG. 13 is a diagram showing a positional relationship between a photoconductor according to another embodiment of the present invention and a transporting unit at the next stage.

FIG. 14A is a front view of the protective paper according to another embodiment of the present invention. (B) It is a front view when the protective paper of (A) is wound around the photoconductor.

FIG. 15A is a front view of the protective paper according to another embodiment of the present invention. (B) It is sectional drawing at the time of winding the protective paper of (A) around a photoreceptor.

FIG. 16 is a diagram showing a positional relationship between an ironing member and a solenoid according to another embodiment of the present invention.

FIG. 17 is a cross-sectional view of a protective paper and a photoconductor according to another embodiment of the present invention.

FIG. 18A is a diagram showing a positional relationship between a photoconductor, protective paper, and peeling claws according to another embodiment of the present invention. (B) It is a P arrow line view in (A).

FIG. 19 is a diagram showing a positional relationship among a photoconductor, protective paper, a peeling claw, and a sensor according to another embodiment of the present invention.

FIG. 20 is a diagram illustrating a timing of separating the peeling claw from the photoconductor.

FIG. 21 is a diagram showing a positional relationship among a photoconductor, protective paper, and a peeling claw of a conventional technique.

[Explanation of symbols]

 1 Original Plate 2 Mirror Base Unit A 3 Mirror Base Unit B 4 Operation Panel 5 Develop Tank 6 Photoreceptor 7 Copy Paper 8 Paper Feed Call-in Roller 9 Conveying Roller 10 Paper Detection Sensor 11 Conveying Roller 12 Conveying Roller 13 Conveying Roller 14 Paper Ejection Sensor 15 Fixing Part 16 Cleaner Part 17 Electrification Lamp 18 Transfer Device 19 Charging Device 20 Photosensitive Information Reading Sensor 21 Paper Before Fixing Guide 22 Main Exposure Light Source Unit 23 First Mirror 24 Second Mirror 25 Third Mirror 26 Lens 27 Manual Paper Feeding Guide 28 Fourth Mirror 29 Fifth Mirror 30 Sixth Mirror 61 Peeling Claw (State Abutting on Photoreceptor) 61 'Peeling Claw (State Separated from Photoreceptor) 62 Photoreceptor Protective Paper 63 Photoreceptor Information Mark 77 Charger 78 Adhesive part of protective paper 78a Adhesive part of protective paper 79 Conventional Adhesive portion of the patient's 80 ironing member 81 spring 82 solenoid 83 lever 84 grid 85 discharge sensor 131 peeling claw 132 protective sheet 133 stainless steel plate 133a stainless steel plate side edge portions 133b stainless steel plate side end portions 133c polymerization junction 134 the felt 135 photoconductor

Claims (5)

[Claims] 1. A photoconductor that can be attached to an image forming apparatus together with a protective paper that covers and protects the photoconductor, a removing unit that removes the protective paper from the photoconductor, and a charge imparting device provided around the photoconductor. An image forming apparatus including a means, the protective paper is electrostatically adsorbed to the photoconductor by the charge applying means, and the protective paper is peeled from the photoconductor by the removing means. Image forming apparatus. 2. The image forming apparatus according to claim 1, wherein a means for removing electric charge from the protective paper peeled off by the removing means is provided in the paper transport path. 3. A photosensitive member that can be mounted in an image forming apparatus together with a protective paper that is wound around a photosensitive member and that is held by an adhesive portion, and a peeling unit that peels the protective paper from the photosensitive member. The image forming apparatus having the above-mentioned, wherein the position of the peeling unit and the position of the adhesive portion are different from each other in the axial direction of the photoconductor. 4. A plurality of adhesive portions of the protective paper are provided, and the plurality of adhesive portions are arranged from a central portion in the axial direction of the photoconductor, as they extend from the upstream side to the downstream side in the rotation direction of the photoconductor. The image forming apparatus according to claim 3, wherein the image forming apparatus is provided so as to be shifted to a side end portion. 5. The image forming apparatus according to claim 3, wherein the peeling unit is separated from the photoconductor between a winding start end of the protective paper and an adhesive portion of the protective paper. .