JP2002099102A - Electrophotographic photoreceptor with flange and its manufacturing method, and color image forming device equipped with the electrophotographic photoreceptor with flange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor with a flange which can securely prevent unevenness in picture quality, its manufacturing method, and a color image forming device. SOLUTION: When the electrophotographic photoreceptor 1 with the flange is manufactured which has a cylindrical electrophotographic photoreceptor 2 having at least one end opened and the flange 3 having a cylindrical fitting part 10 fitted in the opened end part of the photoreceptor 2, the ratio (L/D) of the length L of the fitted part of the flange 3 to the internal diameter D of the cylinder electrophotographic photoreceptor 2 is 0.6 to 1 and the flange fitted part 10 is fitted in the opened end part of the photoreceptor 2. In this case, when the flange fitting part 10 is fitted in the opened end surface of the photoreceptor 2, the extension direction of the fitted part is sufficiently prevented from slanting to the extension direction of the photoreceptor 2 large exceeding a permissible range.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flanged electrophotographic photosensitive member used for an image forming apparatus such as a printer, a method for manufacturing the same, and a color image forming apparatus provided with the flanged electrophotographic photosensitive member.

[0002]

2. Description of the Related Art Generally, an image forming apparatus such as a printer has
The image forming apparatus includes a cylindrical electrophotographic photoreceptor formed by forming a photosensitive layer on the outer peripheral surface of a cylindrical base material.
While rotating the cylindrical electrophotographic photosensitive member, charging, exposure,
An image is formed by performing development, transfer, and the like.

[0003] A flange is fitted to the end of such a cylindrical electrophotographic photosensitive member so as to rotate the photosensitive member. The flange supports a rotating shaft for rotating the electrophotographic photosensitive member and rotates the rotating shaft. Transmits force to the electrophotographic photoreceptor. Therefore, the flange is generally provided with a driving unit for applying a rotational driving force to the electrophotographic photosensitive member, and a fitting portion fitted to an end of the electrophotographic photosensitive member.

[0004] Such an electrophotographic photoreceptor with a flange,
It can be obtained by fitting the fitting part of the flange to the end opening of the cylindrical electrophotographic photosensitive member.

Here, with respect to the electrophotographic photosensitive member with a flange, (1) a tolerance band in which a difference between the outer diameter of the fitting portion of the flange and the inner diameter of the cylindrical substrate does not occur as much as possible in order to reduce runout. And (2) the outer diameter of the fitting portion of the flange is much larger than the inner diameter of the cylindrical substrate because of the possibility of deformation of the cylindrical substrate. It is hoped that it is not a relationship, so J
Intermediate shrink by fitting IS is generally used.

[0006]

In recent years, as the size of image forming apparatuses has been reduced, the diameter of electrophotographic photosensitive members has also been reduced. In recent years, higher image quality has been demanded, and the demand is particularly remarkable in a color image forming apparatus. On the other hand, in an electrophotographic photoreceptor manufacturing factory, inspection of defective products is generally performed not on all products but on a part of the products.
Even when an individual defective product occurs, the manufacturing cost is greatly increased and the manufacturing efficiency is significantly reduced. Therefore, it is required that the frequency of occurrence of the defective product be extremely low.

However, as the diameter of the electrophotographic photosensitive member has been reduced, the size of the flange fitted to the end of the cylindrical substrate has also been required to be reduced. Then, even if the end surface perpendicularity of the end of the cylindrical base material and the end surface perpendicularity of the fitting portion of the flange are precisely adjusted, the flange 101 is fitted to the cylindrical base material 100 as shown in FIG. At this time, the fitting portion 1 of the flange 101
01a is greatly inclined beyond the allowable range with respect to the extending direction of the cylindrical substrate 100, and the flange 1
01 may be fitted to the cylindrical substrate 100. In particular, the larger the difference between the inner diameter of the cylindrical base material and the outer diameter of the fitting portion of the flange fitted into the end opening, the more remarkable the tendency. Such a fitting state that exceeds the allowable range increases the deflection of the electrophotographic photosensitive member with a flange during rotation, and causes uneven image quality in an image forming apparatus equipped with the electrophotographic photosensitive member with a flange. Therefore, it is necessary to avoid as much as possible.

The present invention has been made in view of the above circumstances, and an electrophotographic photosensitive member with a flange, a method of manufacturing an electrophotographic photosensitive member with a flange, and a method of manufacturing the electrophotographic photosensitive member with a flange, which can reliably prevent the occurrence of image unevenness. It is an object to provide a color image forming apparatus provided with an electrophotographic photosensitive member.

[0009]

In order to achieve the above object, the present invention provides a cylindrical electrophotographic photosensitive member having at least one open end, and fitted to the open end of the electrophotographic photosensitive member. In the method for manufacturing an electrophotographic photosensitive member with a flange including a flange having a cylindrical fitting portion, the cylindrical electrophotographic photosensitive member and the flange have the following formula: 0.6 ≦ (L / D) ≦ 1. 0 (where L represents the length of the fitting portion of the flange, and D represents the inner diameter of the cylindrical electrophotographic photosensitive member). And a step of fitting to an open end of the electrophotographic photosensitive member in a shape.

According to the present invention, when the fitting portion of the flange is fitted to the open end of the cylindrical electrophotographic photosensitive member, the extending direction of the fitting portion is the extending direction of the cylindrical electrophotographic photosensitive member. Is greatly prevented from exceeding the allowable range. For this reason, it is possible to obtain an electrophotographic photosensitive member with a flange that has sufficiently small run-out during rotation.

Further, the present invention provides a cylindrical electrophotographic photosensitive member having an opening formed at least at one end, and a flange having a cylindrical fitting portion fitted into the opening of the electrophotographic photosensitive member. In the electrophotographic photosensitive member, the following formula: 0.6 ≦ (L / D) ≦ 1.0 (where L is the length of the fitting portion of the flange, and D is the inner diameter of the cylindrical electrophotographic photosensitive member. The present invention is an electrophotographic photosensitive member with a flange characterized by satisfying the following conditions:

According to the present invention, the fluctuation of the electrophotographic photosensitive member with a flange during rotation is sufficiently reduced, and the occurrence of image quality unevenness is reliably prevented in an image forming apparatus having the electrophotographic photosensitive member with a flange. Can be.

Further, the present invention provides a color image forming apparatus having a plurality of image forming units each including an electrophotographic photosensitive member with a flange and forming a color image by the plurality of image forming units. The electrophotographic photosensitive member with a flange in each is the above-described electrophotographic photosensitive member with a flange, and each of the plurality of image forming units is charged by a charging unit for charging the electrophotographic photosensitive member with a flange, and the charging unit. An exposure unit that exposes the electrophotographic photosensitive member with a flange, a development unit that develops a portion exposed by the exposure unit, and a transfer unit that transfers an image developed by the development unit, Color image forming apparatus.

According to this image forming apparatus, the fluctuation of the flanged electrophotographic photosensitive member during rotation is sufficiently reduced, so that it is possible to reliably prevent the occurrence of image quality unevenness in the obtained color image.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail.

FIG. 1 is an exploded partial cross-sectional view showing an embodiment of the electrophotographic photosensitive member with a flange of the present invention, and shows a state in which the flange is detached from the electrophotographic photosensitive member. FIG.
As shown in FIG. 1, the flanged electrophotographic photoreceptor 1 includes a cylindrical electrophotographic photoreceptor 2 and flanges 3 fitted to both ends thereof.

Here, the electrophotographic photosensitive member 2 constituting the electrophotographic photosensitive member 1 with a flange of the present invention will be described first. The electrophotographic photoreceptor 2 is obtained by forming a photosensitive layer 5 on the outer peripheral surface of a cylindrical substrate 4.

The photosensitive layer 5 is made of a known photoconductive material, but is preferably made of a material having an organic photoconductive material formed on the basis of a resin in consideration of environmental factors and the like. It is.

It is preferable to provide an undercoat layer (not shown) between the cylindrical substrate 4 and the photosensitive layer 5.

The cylindrical substrate 4 is not particularly limited as long as it is basically a material that can be formed into a cylindrical shape. However, from the viewpoints of molding, workability, strength, etc., metals, particularly aluminum,
Aluminum alloy or stainless steel is preferred. Further, the cylindrical substrate 4 may be formed by turning or grinding an outer peripheral surface of an aluminum or aluminum alloy having a habit of bending or the like which is well known in advance, into a cylindrical member by an extrusion method or a drawing method. preferable. The cylindrical substrate 4 may be obtained by further processing the outer peripheral surface of a turned or ground cylindrical member.

As shown in FIG. 1, the cylindrical substrate 4 used in the present invention is normally open at both ends, and has an opening 6 at that portion. However, in the image forming apparatus, the cylindrical substrate 4
When one end of the cylindrical base material 4 is rotatably supported by a support member (not shown), only one end of the cylindrical base material 4 needs to be opened and the opening 6 may be provided at that portion.

The cylindrical substrate 4 has a second cylindrical portion 7 at the center, and a first cylindrical portion 8 and a third cylindrical portion 9 having open ends at both sides of the second cylindrical portion 7, respectively. linked.
The inner diameters of the first cylindrical portion 8 and the third cylindrical portion 9 are
It is larger than the inside diameter. With such a configuration, there is a tendency that the direction in which the fitting portion 10 of the flange 3 described later extends greatly tilts beyond the allowable range with respect to the direction in which the cylindrical base material 4 extends can be more sufficiently prevented. is there.

On the other hand, as shown in FIG.
Cylindrical fitting part 1 fitted inside electrophotographic photosensitive member 2
0, an exposed portion 11 exposed outside the electrophotographic photosensitive member 2
Consists of The gear part 12 may be formed integrally with the exposed part 11.

The material of the flange 3 is not particularly limited.
From the viewpoint of mass productivity, price, and the like, thermoplastic resins such as polycarbonate resin, polypropylene resin, and ABS resin are used.

As shown in FIG. 2, in the electrophotographic photosensitive member 1 with a flange according to the present invention, the inner diameter of the cylindrical electrophotographic photosensitive member 2, that is, the inner diameter of the first cylindrical portion 8 is D, and the flange 3 is fitted. When the length of the joint portion 10 is L, the ratio (L / D) of the length L of the fitting portion to the inner diameter D satisfies the following expression: 0.6 ≦ (L / D) ≦ 1. When the ratio (L / D) is out of the above range,
When the fitting portion 10 of the flange 3 is fitted into the opening 6 of the electrophotographic photosensitive member 2, the extending direction A of the fitting portion 10 of the flange 3 is an allowable range with respect to the extending direction B of the first cylindrical portion 8. , And the deflection of the electrophotographic photosensitive member with flange 1 during rotation may increase. Therefore, in an image forming apparatus provided with the electrophotographic photosensitive member 1 with a flange, image unevenness due to the shake of the electrophotographic photosensitive member 1 with a flange may occur.

The ratio (L / W) of the length L of the fitting portion 10 of the flange 3 to the length W of the first cylindrical portion 8 is as follows: 0.9 ≦ (L / W) ≦ 1. 0 is preferably satisfied. Outside this range, when the fitting portion 10 of the flange 3 is fitted into the opening 6 of the electrophotographic photosensitive member 2, the extending direction A of the fitting portion 10 of the flange 3 becomes the extending direction of the first cylindrical portion 8. B tends to be larger than the allowable range with respect to B.
Tends to be larger during the rotation of.

Further, the outer diameter d of the cylindrical fitting portion 10
(Μm) and the inner diameter D (μm) of the first cylindrical portion 8 (D−
d) is preferably −60 to 30 μm. (D
If −d) exceeds 30 μm, the total runout of the flanged electrophotographic photosensitive member 1 exceeds the allowable range of 60 μm, which tends to cause image unevenness. On the other hand, (D
When −d) is less than −60 μm, secondary obstacles such as deformation of the cylindrical substrate 4 tend to occur.

Further, in the electrophotographic photosensitive member 2 shown in FIG. 1, for the same reason as described for the first cylindrical portion 8, the third cylindrical portion 9 is also provided with respect to the second cylindrical portion 7.
It is preferable that the same relationship as that of the first cylindrical portion 8 is satisfied. That is, when the inner diameter of the third cylindrical portion 9 is D ′ and the length of the fitting portion 10 of the flange 3 is L, the ratio of the length L of the fitting portion 10 to the inner diameter D ′ (L / D ′) Is the following formula: 0.6 ≦ (L / D ′) ≦ 1, the ratio (L / W) satisfies the following formula: 9 ≦ (L / W) ≦ 1, and (D′−d) is It is preferably −60 to 30 μm.

Next, a method of manufacturing the electrophotographic photosensitive member 1 with a flange according to the present invention will be described.

First, a cylindrical member is prepared. Then, turning or grinding is performed on the outer peripheral surface of the cylindrical member, whereby the cylindrical substrate 4 is obtained. The cylindrical substrate 4 may have a uniform inner diameter along the extending direction B. However, the inner surface of the end of the cylindrical substrate 4 having a constant inner diameter is bored using a boring lathe. Is preferably applied. In this case, the cylindrical substrate 4 has a second cylindrical portion 7 and a first cylindrical portion 8 and a third cylindrical portion 9 at both ends thereof. As described above, when the boring process is performed on the cylindrical base material 4, the run-out of the flanged electrophotographic photosensitive member 1 tends to be smaller than when the boring process is not performed.

The outer diameter of the cylindrical substrate 4 is usually from 10 to 20.
0 mm, preferably 20 to 40 mm. When the outer diameter of the cylindrical base member 4 is within the above range, the extending direction A of the fitting portion 10 of the flange 3 is larger than the allowable range with respect to the extending direction B of the cylindrical electrophotographic photosensitive member 2. The present invention is particularly effective for the cylindrical substrate 4 having an outer diameter in the above range because of the tendency to tilt.

Next, a photosensitive layer 5 is formed on the outer peripheral surface of the cylindrical substrate 4. As the photosensitive layer 5, a photosensitive layer having an organic photoconductive material formed on the basis of a resin is preferable. As the photosensitive layer mainly composed of the organic photoconductive material, there are a single layer type having both a charge generating ability and a charge transporting ability, and a laminated type in which a plurality of layers having these functions separated are laminated. May have any structure, but a laminated photosensitive layer is preferable.

In the case of forming a single-layer type photosensitive layer, a coating solution prepared by dispersing and mixing a charge generating substance, a charge transporting substance and a binder resin in a solvent is applied to the outer peripheral surface of a cylindrical substrate. ,dry.

In the case of forming a laminated photosensitive layer, a charge generating layer forming coating solution prepared by dispersing and mixing a charge generating substance and a binder resin in a solvent, a charge transporting substance binder resin and a solvent And a coating liquid for forming a charge transport layer prepared by dispersing and mixing the above. First, after coating and drying the coating liquid for forming a charge generation layer on the outer peripheral surface of the cylindrical substrate 4,
A coating liquid for forming a charge transport layer is applied thereon and dried to form a laminated photosensitive layer 5 on the cylindrical substrate 4.

Examples of the charge generating substance include azo pigments, disazo pigments, quinone pigments, quinocyanine pigments, perylene pigments, indigo pigments, bisbenzimidazole pigments, phthalocyanine pigments, quinacridone pigments, pyrylium salts,
Azulhenium salts, tricrystalline selenium and the like can be mentioned.

As the charge transporting substance, polyaromatic compounds such as anthracene, pyrene, phenanthrene and coronene, or indole, carbazole, oxazole, isoxazole thiol, imidazole, pyrazole, oxazi Examples thereof include compounds having a skeleton of a nitrogen-containing cyclic compound such as azole, pyrazoline, piadiazole and triazole, and hole transport substances such as hydrazone compounds.

Examples of the binder resin include polycarbonate, polyarylate, polystyrene, polymethacrylates, styrene-methyl methacrylate copolymer,
Polyester, styrene-acrylonitrile copolymer, polysulfone, polyvinyl acetate, polyacrylonitrile, polyvinyl butyral, polyvinyl pyrrolidone,
Examples include methylcellulose, hydroxymethylcellulose, cellulose esters and the like.

As the solvent for adjusting the coating solution, a solvent having high volatility and having a vapor density higher than that of air is preferably used. For example, n-butylamine, diethylamine,
Ethylenediamine, isopropanolamine, triethanolamine, N, N-dimethylformamide, acetone, methyl ethyl ketone, cyclohexanone, benzene, 4-methoxy-4-methylpentanone, dimethoxymethane, dimethoxyethane, 2,4-pentadione, anisole, 3- Methyl oxobutanoate, monochlorobenzene, toluene, xylene, chloroform, 1,2-dichloroethane, dichloromethane, tetrahydrofuran,
Examples thereof include dioxane, methanol, ethanol, isopropanol, 1-butanol, ethyl acetate, butyl acetate, dimethyl sulfoxide, methyl cellosolve, ethyl cellosolve, methyl cellosolve, and methyl cellosolve acetate.

It is preferable to provide an undercoat layer between the cylindrical substrate 4 and the photosensitive layer 5. As the undercoat layer, for example, acrylic resin, methacrylic resin, vinyl chloride resin, vinyl acetate resin, epoxy resin, polyurethane resin, phenol resin, polyester resin, alkyd resin, polycarbonate resin, silicone It is made of various resins such as resin and melamine resin. The undercoat layer may contain a zirconium compound, a titanium compound or the like in addition to these resins.

As described above, the cylindrical electrophotographic photosensitive member 1 in which the photosensitive layer 5 is formed on the outer peripheral surface of the cylindrical substrate 4 is obtained.

On the other hand, a flange 3 fitted to the electrophotographic photosensitive member 1 is prepared. The flange 3 can be obtained by injection molding a thermoplastic resin, for example, a polycarbonate resin, a polypropylene resin, an ABS resin, or the like, from the viewpoint of mass productivity, price, and the like.

The flange 3 is formed so as to have a cylindrical fitting portion 7 fitted inside the electrophotographic photosensitive member 2 and an exposed portion 11 exposed to the outside of the electrophotographic photosensitive member 2.
The exposed portion 11 may be formed so that the gear portion 2 is integrally formed.

Here, as the cylindrical electrophotographic photosensitive member 2 and the flange 3, the length L of the fitting portion 10 with respect to the inner diameter D is set.
Is the following relational expression: 0.6 ≦ (L / D) ≦ 1 (where L is the length of the fitting portion 10 of the flange 3, and D is the length of the cylindrical electrophotographic photosensitive member 2). An inner diameter (that represents the inner diameter of the first cylindrical portion 8) is prepared. When the ratio (L / D) is out of the above range, when the fitting portion 10 of the flange 3 is fitted into the opening 6 of the electrophotographic photosensitive member 2, the extending direction A of the fitting portion 10 of the flange 3 becomes the second direction. There may be a large inclination beyond the allowable range with respect to the extending direction B of the one cylindrical portion 8, and in this state, the flange 3 may be fitted to the cylindrical electrophotographic photosensitive member 2. For this reason, the run-out during rotation of the electrophotographic photosensitive member 1 with a flange increases, and in an image forming apparatus provided with the electrophotographic photosensitive member 1 with a flange, image unevenness due to the shake of the electrophotographic photosensitive member 1 with a flange occurs. May be.

For the cylindrical electrophotographic photosensitive member 2 and the flange 3, the ratio (L / W) of the length L of the fitting portion 10 of the flange 3 to the length W of the first cylindrical portion 8 is represented by the following relational expression. : It is preferable to prepare one satisfying 0.9 ≦ (L / W) ≦ 1.0. Ratio (L / W)
Is out of the above range, when the fitting portion 10 of the flange 3 is fitted into the opening 6 of the electrophotographic photosensitive member 2, the extending direction A of the fitting portion 10 of the flange 3 is Direction B
The flange 3 may be fitted to the cylindrical electrophotographic photosensitive member 2 in this state. Therefore, the run-out of the flanged electrophotographic photosensitive member 1 during rotation may be greater.

For the flange 3 and the electrophotographic photosensitive member 2, the difference (D−d) between the outer diameter d (μm) of the cylindrical fitting portion 10 and the inner diameter D (μm) of the first cylindrical portion 8 is − 60-30μ
It is preferable to prepare one within the range of m. (D
If −d) exceeds 30 μm, the total runout of the flanged electrophotographic photosensitive member 1 exceeds the allowable range of 60 μm, which tends to cause image unevenness. On the other hand, (D
When −d) is less than −60 μm, secondary obstacles such as deformation of the cylindrical substrate 4 tend to occur.

Further, when the end of the third cylindrical portion 9 is open, the third cylindrical portion 9 as the cylindrical electrophotographic photosensitive member 2 is also in contact with the fitting portion 10 of the flange 3. It is preferable to prepare one that satisfies the same relationship as the first cylindrical portion 8. For example, when the inner diameter of the third cylindrical portion 9 is D 'and the length of the fitting portion of the flange is L, the ratio (L / D') of the length L of the fitting portion 10 to the inner diameter D 'is 0. It is preferable to prepare the cylindrical electrophotographic photosensitive member 2 and the flange 3 so as to be 6 to 1.

Thus, the electrophotographic photosensitive member 2 and the flange 3
Is prepared, the fitting portion 10 of the flange 3 is fitted into the opening 6 of the first cylindrical portion 8 of the electrophotographic photosensitive member 2. Thus, a flanged electrophotographic photosensitive member 1 is obtained. At this time,
Since the extension direction A of the fitting portion 10 of the flange 3 from the extension direction B of the electrophotographic photoreceptor 2 is largely prevented from exceeding the allowable range, the flanged electrophotography with sufficiently small vibration during rotation is provided. The photoreceptor 1 can be reliably obtained.

Next, the above-mentioned electrophotographic photosensitive member with flange 1
A color image forming apparatus provided with the above will be described.

As shown in FIG. 3, the color image forming apparatus 13 according to the present invention has a plurality of image forming units 14, each of which has the electrophotographic photosensitive member 1 with a flange. I have. That is, the color image forming apparatus of the present invention is a so-called tandem type color image forming apparatus. As shown in FIG. 4, the image forming unit 14 includes, in addition to the electrophotographic photosensitive member 1 with a flange,
Charging means 1 for charging the electrophotographic photosensitive member 1 with a flange
5, an exposure unit 16 for exposing the electrophotographic photosensitive member with a flange 1, which is charged by the charging unit 15, a developing unit 17 for developing a portion exposed by the exposure unit 16, Transfer means 18 for transferring the developed image to the electrophotographic photosensitive member 1 with a flange. Further, the image forming unit 14 may include a charge removing device 19 as necessary. In FIG. 4, reference numeral 20 denotes a transfer medium such as paper.

Here, the plurality of image forming units 14
Are used to form images of different colors, and different toners are used in the developing means 17 of each image forming unit 14.

According to the color image forming apparatus 13, the fluctuation of the flanged electrophotographic photosensitive member 1 during rotation can be suppressed sufficiently, so that when the color image forming apparatus 13 forms an image, image quality unevenness occurs. This will surely be prevented.

Next, the contents of the present invention will be specifically described with reference to examples.

[0053]

Example 1 Aluminum was extruded into a cylindrical shape and subjected to drawing to prepare an aluminum pipe made of A6063 having an outer diameter of 30.3, an inner diameter of 28.0, and a length of 342 mm. As the aluminum tube, a tube having openings at both ends was used. The outer peripheral surface of this aluminum tube and its axial center position is 100 m
Hold by m collet chuck, boring lathe 1500r
While rotating at pm, the inside diameter of both ends of the aluminum tube was 28.5 mm in inner diameter D and 2 mm in depth (or length) W.
It processed so that it might be set to 0 mm. Therefore, the ratio of the depth W to the inner diameter D of the aluminum tube was 0.7.

Next, the boring aluminum tube is chucked on a lathe, and while the aluminum tube is rotated at a spindle rotation speed of 3500 rpm, a cutting tool having a cutting edge of polycrystalline diamond is inserted into the longitudinal direction of the aluminum tube. By moving at a roughing feed rate of 0.5 mm / rev and a finishing rate of 0.2 mm / rev along the direction,
Cutting was performed so that the outer diameter of the aluminum tube was φ30.0 to obtain a cylindrical substrate. Rmax of the outer peripheral surface of the obtained cylindrical substrate was 0.6. Next, a photosensitive layer including an undercoat layer, a charge generation layer, and a charge transport layer was formed on the outer peripheral surface of the cylindrical substrate thus obtained.

The undercoat layer was formed as follows.
First, a coating liquid A for forming an undercoat layer was prepared. Coating liquid A
Are 20 parts by weight of a zirconium compound represented by the following structural formula (1) (Orgatics ZC540 manufactured by Matsumoto Pharmaceutical Co., Ltd.) and a silane coupling agent represented by the following structural formula (2) (manufactured by Nippon Unicar Co., Ltd.) A-1100) 2 parts by weight, 2 parts by weight of a polyvinyl butyral resin (S-LEC BM-S manufactured by Sekisui Chemical Co., Ltd.) represented by the following structural formula (3), 1
-Adjusted from 70 parts by weight of butanol.

Then, the coating liquid A was applied to the outer peripheral surface of the cylindrical substrate, and dried at 150 ° C. for 10 minutes.
An undercoat layer of 0 μm was formed.

[0057]

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[0058]

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[0059]

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Next, a coating solution B for the charge generation layer was prepared. The coating liquid B was prepared by mixing 5 parts by weight of chlorgallium phthalocyanine, 5 parts by weight of a vinyl chloride-vinyl acetate copolymer of the following structural formula (4), and 200 parts by weight of n-butyl acetate with glass beads of 1 mmφ, and using a sand mill. Obtained with time dispersion. Then, the coating liquid B was applied on the surface of the undercoat layer, and dried at 100 ° C. for 10 minutes to produce a charge generation layer having a dry film thickness of 0.2 μm.

[0061]

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Next, a coating solution C for the charge transport layer was prepared. The coating liquid C was composed of 1 part by weight of a charge transport material having the following structural formula (5), 1 part by weight of a polycarbonate resin having the following structural formula (6) (Iupilon Z300 manufactured by Mitsubishi Gas Chemical Co., Ltd.), 2 parts by weight of monochlorobenzene, and tetrahydrofuran. Adjusted from 4 parts by weight. Then, the coating liquid C is applied to the surface of the charge generation layer, and dried at 120 ° C. for 60 minutes to obtain a dry film thickness of 25 μm.
Was produced.

[0063]

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[0064]

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On the other hand, a flange was prepared by injection-molding a fluorine-containing polycarbonate resin (LS-2030 manufactured by Mitsubishi Engineering Plastics). At this time, the flange was formed such that the outer diameter d of the fitting portion of the flange fitted with the inner diameter of the electrophotographic photosensitive member was 28.52 and the length L was 18 mm. The shape of the flange was the cross-sectional shape shown in FIG. Therefore, the ratio (L / W) of the length L of the fitting portion of the flange to the depth W is 0.9. The difference (D-d) between the inner diameter D of the end of the cylindrical substrate and the length d of the fitting portion of the flange was -20 μm.

Next, a two-part epoxy resin (Cemedine EP) was applied to the inner surfaces of both ends of the cylindrical electrophotographic photosensitive member, respectively.
After the application of several grams of -007), fitting portions of flanges were inserted into both ends of the electrophotographic photosensitive member, and the flanges were bonded to the electrophotographic photosensitive member. Then, the adhesive was cured by being left for 48 hours. Thus, a flanged electrophotographic photosensitive member was obtained. In the same manner as above, ten electrophotographic photosensitive members with a flange were produced.

The thus obtained electrophotographic photosensitive member with a flange was provided with a diameter φ8 so as to pass through the openings of both flanges.
The rotating shaft of SUS304 was inserted. Then, each end of the rotating shaft was supported by a block having a V-shaped groove, and the rotating shaft was rotated. The maximum deflection at the center of the electrophotographic photosensitive member and the maximum deflection at both ends were measured by a pick tester. Table 1 shows the results.

[0068]

[Table 1]

The pick tester has a scale and a needle-shaped measuring element attached to the scale, the scale is fixed to a magnet stand, and the tip of the measuring element is mounted on the scale. On the other hand, it was attached to be able to swing. At the time of measurement, the pick tester was fixed such that the probe touched the peripheral surface of the electrophotographic photosensitive member.

Further, the four flanged electrophotographic photosensitive members produced as described above were mounted on a small-diameter tandem full-color image forming apparatus (experimental machine) to form an image.
When the image quality was evaluated, it was possible to obtain an image without unevenness in image quality even when any of the electrophotographic photosensitive members with a flange was mounted on the full-color image forming apparatus.

(Comparative Example 1) At the time of boring an aluminum tube, the inner diameter D of the end portion was φ28.46 and the depth W was 10
An electrophotographic photoreceptor was produced in the same manner as in Example 1 except that the thickness was changed to mm. In addition, Rm after cutting the outer peripheral surface of the bored aluminum pipe in the same manner as in Example 1.
ax was 0.58.

Further, the length L of the fitting portion of the flange is 9 mm.
A flange was produced in the same manner as in Example 1 except that the above conditions were satisfied. From the above, L / D = 0.9 and D−d = 40 μm.

Then, the fitting portion of the flange was fitted to the open end of the cylindrical electrophotographic photosensitive member in the same manner as in Example 1 to obtain an electrophotographic photosensitive member with a flange. In this way, ten flanged electrophotographic photosensitive members were prepared.

For the obtained electrophotographic photosensitive member with a flange, the maximum deflection at the center portion and the maximum deflection at both ends of the electrophotographic photosensitive member with a flange were measured in the same manner as in Example 1. Table 1 shows the results.

As shown in Table 1, all of the electrophotographic photosensitive members with a flange obtained in Example 1 had a sufficiently small run-out, whereas the electrophotographic photosensitive members with a flange obtained in this comparative example had a small deflection. As for the photoreceptors, it was found that one out of ten photoreceptors showed a large fluctuation (No. 6 in Table 1).

Further, the four flanged electrophotographic photosensitive members produced as described above were mounted on a small-diameter tandem full-color image forming apparatus (experimental machine) to form an image.
When the image quality was evaluated, for the electrophotographic photoreceptors with flanges Nos. 1 to 5 and Nos. 7 to 10, images without uneven image quality could be obtained.
The number-flanged electrophotographic photoreceptor had extremely large image quality unevenness, and was unfit for practical use.
Therefore, in the electrophotographic photosensitive member with a flange according to this comparative example, it cannot be said that the occurrence of image quality unevenness can be reliably prevented.

An investigation was made on the electrophotographic photosensitive member with a No. 6 flange. It was found that the adhesive was solidified in a state where the left flange with large runout was inserted obliquely with respect to the cylindrical substrate. found.

[0078]

As described above, according to the method of manufacturing an electrophotographic photosensitive member with a flange of the present invention, when the flange fitting portion is fitted to the open end of the cylindrical photosensitive member, the fitting is performed. It is possible to sufficiently prevent the extending direction of the portion from greatly inclining beyond the allowable range with respect to the extending direction of the cylindrical photoconductor. For this reason, it is possible to sufficiently reduce the deflection of the obtained electrophotographic photosensitive member with a flange during rotation, and it is possible to reliably prevent the occurrence of image quality unevenness when this is incorporated in an image forming apparatus.

Further, according to the electrophotographic photosensitive member with a flange of the present invention, the run-out during rotation thereof is sufficiently reduced, so that when this is incorporated into an image forming apparatus, it is possible to reliably prevent the occurrence of image quality unevenness. Can be.

Further, according to the color image forming apparatus of the present invention, since the flanged electrophotographic photosensitive member having sufficiently small vibration during rotation is provided, it is possible to reliably prevent the occurrence of image quality unevenness.

[Brief description of the drawings]

FIG. 1 is an exploded partial sectional view showing an electrophotographic photosensitive member with a flange of the present invention.

FIG. 2 is a partial cross-sectional view showing a flange and a cylindrical electrophotographic photosensitive member of FIG. 1;

FIG. 3 is a schematic diagram of a color image forming apparatus of the present invention.

FIG. 4 is a schematic diagram illustrating a configuration of the image forming unit of FIG. 3;

FIG. 5 is a cross-sectional view illustrating a flange used in the first embodiment.

FIG. 6 is a cross-sectional view showing a state in which the flange is fitted to the cylindrical substrate in a state where the extending direction of the fitting portion of the flange is greatly inclined with respect to the extending direction of the cylindrical substrate. is there.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electrophotographic photosensitive member with a flange, 2 ... cylindrical electrophotographic photosensitive member, 3 ... flange, 4 ... cylindrical base material, 7 ... 2nd cylindrical part, 8 ... 1st cylindrical part, 10 ... fitting part, 13 ... color image forming apparatus, 14 ... image forming unit, 15 ... charging means,
16 exposure means, 17 developing means, 18 transfer means,
L: length of the fitting portion of the flange, D: inner diameter of the cylindrical electrophotographic photosensitive member or the inner diameter of the first cylindrical portion, W: length of the first cylindrical portion.

Claims (4)

[Claims] 1. A flanged electronic device comprising: a cylindrical electrophotographic photosensitive member having at least one open end; and a flange having a cylindrical fitting portion fitted to an open end of the electrophotographic photosensitive member. In the method of manufacturing a photoreceptor, the cylindrical electrophotographic photoreceptor and the flange may have the following formula: 0.6 ≦ (L / D) ≦ 1.0 (where L is the length of the fitting portion of the flange) D represents the inner diameter of the cylindrical electrophotographic photosensitive member), and fitting the fitting portion of the flange to the open end of the cylindrical electrophotographic photosensitive member. And a process for producing an electrophotographic photosensitive member with a flange. 2. A flanged electronic device comprising: a cylindrical electrophotographic photosensitive member having at least one open end; and a flange having a cylindrical fitting portion fitted into the open end of the electrophotographic photosensitive member. In the photoreceptor, the following formula: 0.6 ≦ (L / D) ≦ 1.0 (where L represents the length of the fitting portion of the flange, and D represents the inner diameter of the cylindrical electrophotographic photoreceptor. An electrophotographic photosensitive member with a flange characterized by satisfying (1). 3. The cylindrical electrophotographic photosensitive member has a cylindrical substrate, wherein the cylindrical substrate has a first cylindrical portion into which a fitting portion of the flange is fitted, and the first cylindrical portion. And a second cylindrical portion having an inner diameter smaller than the inner diameter of the first cylindrical portion, wherein the first cylindrical portion has the following formula: 0.7 ≦ (W / D) ≦ 1.5 (where W is the first cylindrical portion) 3. The electrophotographic photosensitive member with a flange according to claim 2, wherein the length D represents an inner diameter of the first cylindrical portion. 4. A color image forming apparatus having a plurality of image forming units each including an electrophotographic photosensitive member with a flange and forming a color image by the plurality of image forming units, wherein each of the plurality of image forming units has a flange. The electrophotographic photosensitive member is the electrophotographic photosensitive member with a flange according to claim 2 or 3, wherein each of the plurality of image forming units includes a charging unit configured to charge the electrophotographic photosensitive member with the flange, and the charging unit. Exposure means for exposing the charged electrophotographic photosensitive member with a flange, developing means for developing a portion exposed by the exposure means, and transfer means for transferring an image developed by the development means A color image forming apparatus.