JPH1083089A - Production of photoreceptor drum and equipment therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve productivity per wiping tape-supplying roll without increasing the winding diameter and area for the exclusive use of a production equipment, by using the wiping tape supplying roll constituted in such a manner that a wiping tape is wound on the bias in double row on the circumference of a sufficiently long shaft. SOLUTION: A wiping tape supplying mechanism 1, a tension roller 2, guiding rollers 3 and 3', a photoreceptor drum rotating mechanism 4 and a wiping tape take-off device 5 are arranged so that their rotary shafts are in parallel with each other. Then, a photoreceptor drum is attached to the photoreceptor drum rotating mechanism 4 and the wiping tape 11 to be brought into contact with the photoreceptor drum is fitted to the wiping tape supplying mechanism 1, in a fixed supplying roll shape. In the wiping tape supplying roll, the wiping tape 11 is wound on the bias in double row on the circumference of the sufficiently long shaft. Thus, a long size wound supplying roll can be prepared without making the winding diameter so large.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a photosensitive drum and an apparatus for manufacturing the same.
The present invention relates to an improvement in a wiping tape technique suitable for removing a photoconductor film once formed on an end surface of a photoconductor drum.

[0002]

2. Description of the Related Art Heretofore, as a photoreceptor drum, a drum having a photoreceptor film formed on the surface of the drum by immersing the drum in an organic photoreceptor solution and lifting it up is used. However, when the photoconductor drum is used in a copying machine, a laser printer, or the like, it is considered practically preferable that the photoconductor film does not exist on the surface of a predetermined region at the end of the drum. Is distributed as a product.

On the other hand, when the above-mentioned immersion pulling method is used, it is inevitable that a photosensitive film is formed up to the end of the drum. Therefore, after the solvent is removed by pulling up, the excess photosensitive film once formed is removed. It is necessary. Various specific removal methods have been proposed, but most commonly, a method of removing the photoreceptor film by contacting the end of the drum with a wiping tape immersed in a solvent that dissolves the photoreceptor film. Adopted.

[0004]

However, since the wiping tape is usually wound in a single row, if the wiping tape is made long, the wrapping diameter becomes large and the occupied area of the apparatus becomes large. However, when the length is reduced, the frequency of tape replacement is increased, and there is a problem that productivity is reduced.

[0005]

The inventor of the present invention uses a wiping tape supply roll in which a wiping tape is wound in a biased manner in a double row around a shaft having a sufficient length, instead of a single row of tape. In addition, the above-mentioned problem has been solved by devising a device in which an appropriate tension roller and guide roller are provided between the wiping tape supply mechanism and the photosensitive drum rotating mechanism.

That is, the gist of the present invention is to provide a method of manufacturing a photosensitive drum in which an end surface of the photosensitive drum on which a photosensitive film is formed is brought into contact with a wiping tape to remove the photosensitive film. A method of manufacturing a photosensitive drum, and a wiping tape supply mechanism, a tension roller, a guide roller, and a photosensitive drum, wherein a wiping tape supply roll in which a wiping tape is wound in a biased double row around a length axis is used. In the drum end photosensitive film removing device provided with a rotating mechanism and a wiping tape take-off roller, 1. The wiping tape supply mechanism is provided with a wiping tape supply roll in which a plurality of wiping tapes are wound in a biased manner around a shaft having a sufficient length. The above mechanisms and rollers are arranged such that their respective rotation axes are parallel to each other in the above order, and furthermore, the wiping tape is arranged so as to be able to travel in contact with the surfaces of the rolls and the photosensitive drum, and A) The guide roller is disposed at a fixed position on the shaft such that the wiping tape contacts a predetermined portion of the end of the photosensitive drum, and the guide roller is so arranged that the wiping tape does not come off the surface of the roller. A flange portion is provided at the shaft end. B) The tension roller is always at an intermediate position between a fixed position on the axis of the guide roller and a different position on the axis of the wiping tape supply roll at all times while the wiping tape is running. As is,
2. It can be moved in the axial direction, and can also be moved in the direction perpendicular to the axis so that the tension applied to the wiping tape can be adjusted. The photoreceptor drum rotating mechanism and the wiping tape take-off roller are each provided in a drum end photoreceptor film removing apparatus, which can be driven by power.

[0007]

Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a conceptual plan view of a drum end photoreceptor film removing device, FIG. 2 is a conceptual side view of a wiping tape supply roll, and FIG. 3 is a conceptual side sectional view of a tension roller. . In the figure, (1) is a wiping tape supply mechanism, (2) is a tension roller, (3) is a guide roller, (4) is a photosensitive drum rotating mechanism, and (5) is a wiping tape take-off mechanism. A roller, (10) is a shaft, (11) is a wiping tape, (20) is a roller bearing shaft, (21) is a spring, (22) is a support wall, and (23) is a flange.

In the method of the present invention, as shown in FIG. 1, a wiping tape supply mechanism (1), a tension roller (2),
A drum end photoreceptor film removing device including guide rollers (3) and (3 '), a photoreceptor drum rotating mechanism (4), and a wiping tape take-off roller (5) is used. The photosensitive drum from which a predetermined portion of the photosensitive film is to be removed is mounted on the photosensitive drum rotating mechanism (4), and the wiping tape (11) to be brought into contact with the photosensitive drum rotating mechanism (4) is provided on a predetermined supply roll. And attached to the wiping tape supply mechanism (1).

As shown in FIG. 2, the wiping tape supply roll is required to be formed by winding a wiping tape (11) around the shaft (10) having a sufficient length in multiple rows in a biased manner. is there. This makes it possible to prepare a long roll supply roll without increasing the winding diameter so much, which leads to various advantages described below. The width of the wiping tape (11)
It depends on the width of the photoreceptor film to be removed.
It is about 30 mm, which is 20 mm in outer diameter and 150 mm in length.
When a double-layer winding is formed adjacent to and around the axis (10) of mm in a biased manner, the average length of one layer is about 70 m, and 1000 m.
Even a supply roll having a length is about 200 layers at most, and the winding diameter of the supply roll is only about 220 mm.

In order to remove the photosensitive film at the end of the drum by using the wiping tape (11), the tape unwound from the supply roll is fed to the tension roller (2), the guide roller (3), The photosensitive drum, the guide roller (3 ') and the wiping tape take-off roller (5) are brought into contact with these surfaces in this order. At that time, in order to accurately and effectively remove the photosensitive film from a predetermined portion of the drum end, the arrangement of various mechanisms and rollers constituting the removing device is important. In addition,
The guide roller (3 ′) may be a guide pin that does not include a roller that rotates in contact with the wiping tape in some cases.

That is, not only the mechanisms and rollers are arranged so that their respective rotation axes are parallel to each other, but especially, the guide roller (3) is always arranged at a fixed position on the axis, and the structure is taken into consideration. The tension roller (2) is arranged and the structure is taken into consideration so that the axial position of the wiping tape unwound from the supply roll can be changed by changing the axial position. This is very important.

Specifically, a) the guide roller (3)
A flange is provided at the end of the roller shaft so that the wiping tape is arranged at a fixed position on the shaft so that the wiping tape contacts a predetermined portion of the end of the photoconductor drum, and the wiping tape does not come off the surface of the roller. Structure. The meandering of the tape can be prevented by making the center of the surface of the guide roller (3) convex. On the other hand, b) tension roller (2)
During the running of the wiping tape, always at a fixed position on the axis of the guide roller, and at an intermediate position between different positions on the axis of the wiping tape supply roll, so as to be movable in the axial direction,
Moreover, so that the tension applied to the wipe tape can be adjusted,
It can be moved in the direction perpendicular to the axis.

In the example shown in FIG. 3, the tension roller (2)
Is rotatably supported by a roller bearing shaft (20), and is provided with a flange (23) so as not to come off from the shaft. Of course, it is also possible to provide a ball bearing or the like between the shaft (20) and the roller (2) to make the rotation of the roller smooth. In the example shown in FIG. 1, the tension roller (2) is connected to the support wall (2) via the spring (21).
Although attached to 2), a groove (not shown) parallel to the roller receiving shaft is provided on the support wall so as to be movable in the axial direction, and a tension applied to the wiping tape (11) by the spring (21). And can be moved in the direction perpendicular to the axis.

In the present invention, the wiping width accuracy when removing the photoreceptor film can be adjusted by the installation positions of the wiping tape supply mechanism (1), the tension roller (2) and the guide roller (3). . Empirically, the wiping width accuracy is such that the smaller the moving angle of the wiping tape is, that is, if the wiping tape supply roll has the same tape winding width, the wiping tape from the wiping tape supply mechanism (1) to the guide roller (3) has a smaller width. The longer the better, the better. Usually, the length of the wiping tape is selected from the range of 3 to 20 times the tape winding width of the tape supply roll. For example, a wiping tape supply mechanism (1)
The length of the wiping tape from the roller to the tension roller (2) is 800m
m, when the length of the wiping tape from the tension roller (2) to the guide roller (3) is 700 mm, the tape winding width is 150 mm.
mm, the moving angle of the wiping tape is about 3 °, but the tension roller is not used, and the length of the wiping tape from the wiping tape supply mechanism (1) to the guide roller (3) is 300 mm. In the case of (1), the moving angle is one fifth as compared with about 14 °. Further, if necessary, two turn rollers or turn pins (not shown) for folding are provided between the tension roller (2) and the guide roller (3) to further reduce the moving angle of the wiping tape. age,
It is possible to further improve the wiping width accuracy.

In the present invention, in order to effectively remove the photosensitive film from a predetermined portion of the drum end, the photosensitive drum rotating mechanism (4) and the wiping tape take-off roller (5) are each driven by power. It is important to be able to. For example, by separately driving them and setting the rotational direction of the drum and the moving direction of the wiping tape to be opposite to each other, the wiping width accuracy is improved. The rotation of the drum is selected from a range of about 1 to 50 cm / sec in peripheral speed, and the moving speed of the tape is selected in a range of about 1 to 30 cm / sec.

In the present invention, the solvent for dissolving the photoreceptor film is impregnated into the wiping tape before it is brought into contact with a predetermined portion at the end of the drum. In the apparatus illustrated in FIG. 1, a guide roller (3) and a photosensitive drum rotating mechanism (4) are usually used.
A mechanism for quantitatively supplying the solvent to the running wiping tape, specifically, a quantitative pump such as a syringe pump or a tube pump is provided at a position between the two. The supply rate of the solvent is 1 to 20 ml / min, preferably 5 to 10 ml / min.
min. In practice, the supply speed is adjusted according to the thickness of the photoreceptor film to be removed. A thicker film requires a higher supply rate.

Further, since the photosensitive drum is usually covered with the photosensitive film to the lower end when immersed in the photosensitive solution, only the predetermined partial photosensitive film at the lower end is removed by the present invention. Is fine. However, depending on the product,
A similar removal process may be desired for the upper edge. In that case, a desired product can be obtained by performing the same processing on the upper end.

Hereinafter, the present invention will be described with reference to examples.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention was carried out using the apparatus shown in FIGS. A cotton 15mm wide wiping tape (11)
A wiping tape supply roll (tape winding width: 150 mm, tape wound around a cylindrical shaft (10) having an outer diameter of 20 mm and a length of 150 mm, wound in a biased manner in multiple rows, and folded near both ends to form a plurality of layers. A winding diameter of 220 mm and a total winding length of 1000 m) were mounted on the wiping tape supply mechanism (1). On the other hand, Al with an outer diameter of 30 mm and a length of 300 mm
The drum is immersed in the photoreceptor solution, pulled up, and the solvent is removed.
The photosensitive drum covered with m) was mounted on the photosensitive drum rotating mechanism (4).

A wiping tape supply mechanism (1), a tension roller (2), a guide roller (3),
(3 '), the photosensitive drum rotating mechanism (4) and the wiping tape take-off roller (5) were arranged such that their rotating axes were parallel to each other. At this time, the length of the wiping tape between the wiping tape supply mechanism (1) and the tension roller (2) and the length of the wiping tape between the tension roller (2) and the guide roller (3) become 700 mm. Placed.

Further, guide rollers (3) and (3 ')
When the image is projected on a plane including the axis, the image of the wiping tape (11) is always at a fixed position (a fixed position on the axis, that is, the coordinate in the axial direction) from the guide roller (3) to the take-up roller (5). The rollers and the mechanism were arranged so as to occupy a certain position. That is, the guide rollers (3) and (3 ') were arranged such that the line connecting the centers of the contact surfaces of the two rollers with the wiping tape coincided with the center line of the wiping tape width. The take-off roller (5) was also arranged such that the center of the contact surface with the wiping tape was on the same line as the center line. The photoreceptor drum rotating mechanism (4) includes a predetermined portion for removing a photoreceptor film of the photoreceptor drum mounted on the photoreceptor drum.
It was set so as to be in contact with the wiping tape, in other words, to be arranged at a fixed position on the axis.

The guide rollers (3) and (3 ') are both curved rollers. A guide roller having a radius of curvature on a plane including the axis of the curved roller (3) of 30 mm, and a curved surface length of 30.5 mm between tape stopper preventing flanges provided at both ends of the roller was used.

On the other hand, the image of the wiping tape (11) between the wiping tape supply mechanism (1) and the guide roller (3) is positioned on the projection plane at the position where the wiping tape is unwound from the wiping tape supply roll. The tension roller (2) moves in the axial direction so that the tension roller (2) is positioned at an intermediate position between a fixed position on the axis of the guide roller (3) and the unwinding position of the wiping tape. It was arranged to be movable. In addition, in this embodiment, the position of the tension roller was adjusted so that the image of the wiping tape on the projection plane was not bent near the tension roller and was a straight line having a constant width.

The tension roller (2) is, as shown in FIG.
Although the contact portion with the tape is a flat roller, the surface at both end portions is higher than the contact portion, and has a thread-wound shape. The roller bearing shaft (20) for supporting the rotation of the roller is provided with a flange (23) for preventing the roller from coming off. The other end of the roller bearing shaft (20) was attached to a support wall (22) via a spring (21) so as to be movable in the axial direction.

The wiping tape (1) attached to the wiping tape supply mechanism (1) and unwound from the wiping tape supply roll.
In 1), as shown in FIG. 1, each roll and the photosensitive drum were suspended so as to run in contact with their surfaces. Thereafter, the photosensitive drum rotating mechanism (4) and the wiping tape take-off roller (5) are driven by separate powers, respectively, and the wiping tape (11) is taken out at a speed of 5 cm / sec. Was rotated at a peripheral speed of 50 cm / sec in a direction opposite to the traveling direction.

Further, at an intermediate position between the guide roller (3) and the photosensitive drum rotating mechanism (4), a solvent, tetrahydrofuran, for dissolving the photosensitive film is supplied by a syringe pump from the syringe pump.
Wipe tape running at a rate of 0 ml / min (11)
To obtain a photoreceptor drum from which the photoreceptor film at the end of the drum with a width of 10 mm was removed.

As a result of repeating such an operation for 50 wiping drums, the average accuracy of the wiping width was ± 1.0 mm. This was almost the same as the accuracy obtained with the conventional single-row tape.

[0027]

COMPARATIVE EXAMPLE In the above embodiment, the tension roller (2) was not used, and the length of the wiping tape between the wiping tape supply mechanism (1) and the guide roller (3) was set to 700 mm. In the same manner as in Example 1, the average accuracy of the wiping width of the obtained 50 wiping drums was ± 2.0.
mm.

[0028]

According to the present invention, it is possible to improve productivity per wiping tape supply roll without increasing the winding diameter and the occupied area of the apparatus by using the wiping tape wound in multiple rows. Can be. Further, by installing a tension roller movable between the wiping tape supply mechanism and the guide roller in the axial direction and in a direction perpendicular thereto, it is possible to increase the length of the wiping tape therebetween. The tape movement angle can be greatly reduced, and the accuracy of the wiping width of the drum end photosensitive film can be ensured.

[Brief description of the drawings]

FIG. 1 is a conceptual plan view of a drum end photosensitive member film removing device.

FIG. 2 is a conceptual side view of a wiping tape supply roll.

FIG. 3 is a schematic side sectional view of a tension roller.

[Explanation of symbols]

 1. Wiping tape supply mechanism 2. Tension roller 3, 3 'Guide roller 4. Photoreceptor drum rotating mechanism 5. Wiping tape take-off roller 10. Shaft 11. Wiping tape 20. Roller bearing shaft 21. Spring 22. Support wall 23.

Claims (4)

[Claims] In a method of manufacturing a photosensitive drum for removing an end surface of a photosensitive drum on which a photosensitive film is formed by contacting the end surface of the photosensitive drum with a wiping tape, a peripheral portion of a shaft having a sufficient length is provided. Using a wiping tape supply roll having a plurality of wiping tapes wound in a biased manner. 2. A drum end photosensitive film removing apparatus comprising a wiping tape supply mechanism, a tension roller, a guide roller, a photosensitive drum rotating mechanism, and a wiping tape take-off roller. 1. The wiping tape supply mechanism is provided with a wiping tape supply roll in which a plurality of wiping tapes are wound in a biased manner around a shaft having a sufficient length. The above mechanisms and rollers are arranged such that their respective rotation axes are parallel to each other in the above order, and furthermore, the wiping tape is arranged so as to be able to travel in contact with the surfaces of the rolls and the photosensitive drum, and A) The guide roller is disposed at a fixed position on the shaft such that the wiping tape contacts a predetermined portion of the end of the photosensitive drum, and the guide roller is so arranged that the wiping tape does not come off the surface of the roller. A flange portion is provided at the shaft end. B) The tension roller is always at an intermediate position between a fixed position on the axis of the guide roller and a different position on the axis of the wiping tape supply roll at all times while the wiping tape is running. As is,
2. It can be moved in the axial direction, and can also be moved in the direction perpendicular to the axis so that the tension applied to the wiping tape can be adjusted. A drum end portion photoreceptor film removing device, wherein the photoreceptor drum rotation mechanism and the wiping tape take-off roller are each drivable by power. 3. A mechanism for quantitatively supplying a solvent for dissolving the photosensitive film to the running wipe tape at a position between the guide roller and the photosensitive drum rotating mechanism. 3. The apparatus for removing a photosensitive drum film at the end of a drum according to 2. 4. A guide roller or a guide pin is provided at a position between the photosensitive drum rotating mechanism and the wiping tape take-up roller so that the axis thereof is parallel to the axis of the take-up roller. 4. The apparatus according to claim 2, wherein the apparatus is disposed so as to be able to run in contact with the surface of the pin.