JP4746437B2 - Core, cylindrical substrate processing method, electrophotographic photosensitive member, and image forming apparatus - Google Patents

Description

The present invention relates to a child in used during processing of the cylindrical substrate, particularly, as well as assist the accuracy of cutting is inserted into its interior when cutting the outer peripheral surface of the cylindrical substrate, core capable of reducing the chatter vibration or the like during cutting, a method of machining a circular cylindrical substrate, an electrophotographic photoreceptor及beauty picture image forming apparatus.

  An electrophotographic photosensitive member used in an electrophotographic apparatus such as a copying machine, a printer, or a fax machine includes a cylindrical substrate for an electrophotographic photosensitive member and a photosensitive layer formed on the cylindrical substrate. In general, a flange is attached to an electrophotographic apparatus.

  Recently, the electrophotographic apparatus has become full-color, and in order to increase the printing speed, an electrophotographic apparatus such as a so-called quadruple tandem type in which YMCK photoconductors are arranged in the vertical direction is increasing. Color misregistration of multicolor images, and further, high resolution and high saturation are major problems. In order to minimize the color misregistration, high resolution, and high saturation, an electrophotographic photosensitive member having high dimensional accuracy has been required.

  As described above, the electrophotographic photoreceptor is provided with the cylindrical base and the flange, and the precision of the cylindrical base, which is a component, has been required to improve the precision of the electrophotographic photoreceptor.

  In the prior art, as a method of manufacturing a highly accurate cylindrical substrate, a method of correcting roundness or the like using a special apparatus before cutting the surface of the cylindrical substrate has been proposed (for example, a patent) Reference 1). However, this increases the process of correcting the cylindrical substrate, leading to an increase in cost. In addition, since it is not a countermeasure against chatter vibration or the like that occurs during cutting, there is a problem that a highly accurate cylindrical substrate cannot be obtained.

  As a method of manufacturing a high-precision cylindrical base by creating a high-precision part on a cylindrical base before cutting, and holding and cutting the high-precision part, the inner surface of the end of the cylindrical base before cutting is used. There has been proposed a manufacturing method in which after the inlay process is performed, the cylindrical base is cut, the inlay portion is held, and the surface of the cylindrical base is finished and cut (see, for example, Patent Document 2).

  In addition, when performing an inlay process on a cylindrical substrate, a holding member is inserted into the cylindrical substrate, and an inlay process is performed on the basis of the outer diameter of the cylindrical substrate so that a high-precision electrophotographic photoreceptor substrate can be provided. A method has been proposed (see, for example, Patent Document 3).

  In these conventional manufacturing methods, a process and a special apparatus for performing inlay processing before the surface cutting of the cylindrical substrate are necessary, and the cost of the cylindrical substrate increases.

  There has also been proposed a method of manufacturing a highly accurate cylindrical substrate without pre-processing the cylindrical substrate before cutting. Specifically, it is a method of preventing chatter vibration by taking a means for inserting and manufacturing a hollow elastic body inside a cylindrical base body during cutting, but a special device for mounting and separating the hollow elastic body before and after cutting. There is a problem that a process is required and leads to high costs (for example, see Patent Document 4).

  Moreover, what is providing the shape of the hollow elastic body at the time of preventing chatter vibration is also known (for example, refer patent document 5, 6). In this case as well, as described above, a special device / process for mounting and separating the hollow elastic body before and after the cutting process is required, which causes a problem that leads to high costs.

  As a similar method, a method has been proposed in which a hollow elastic body is inserted into a cylindrical base body during cutting of the cylindrical base body to prevent chatter vibration (for example, see Patent Document 7). Is inserted into the cylindrical base body, the workability is lowered, and there is a problem in that it is necessary to separately attach and detach heavy objects.

  As a method for producing a high-precision cylindrical substrate for an electrophotographic photosensitive member without providing a pretreatment or a separate step as in the above-described method, a jig for stabilizing the substrate in an apparatus for holding the substrate during cutting processing. There has also been proposed a manufacturing method for adding (see, for example, Patent Document 8). However, since the air pipes are arranged in a spiral shape and the method of stabilizing the substrate by air pressure is used, there is a problem that the substrate holding device becomes very complicated and the cost is increased.

  There has also been provided a method for preventing chatter vibration by attaching a static pressure support to the cut surface when a cylindrical substrate is cut (see, for example, Patent Document 9).

Further, as shown in FIG. 5 in the present specification, a conventional core used is a cylindrical vibration-proof material (see, for example, Patent Document 10).
Japanese Patent Laid-Open No. 10-314843 Japanese Patent Laid-Open No. 11-160901 JP 2003-167361 A Japanese Patent Laid-Open No. 06-198501 Japanese Patent Laid-Open No. 06-304803 Japanese Patent Laid-Open No. 09-234039 Utility model registration No. 2604434 Japanese Patent Application Laid-Open No. 08-52680 JP 09-239604 A JP 2000-227671 A

  When the core of the conventional core shown in Patent Document 10 is thinned to improve sensitivity, if the holding power increases to the full inner surface of the base, distortion occurs in the base after cutting when the core is removed. Problems arise.

  Further, the core shown in FIG. 6 has a problem that the position of the elastic body is shifted while being inserted and removed during cutting. In addition, it has been necessary to prepare individual cores corresponding to the diameter and length of the substrate.

Therefore, the present invention has been made in view of the above, and a core used for processing a cylindrical substrate for a high-precision electrophotographic photosensitive member that can solve the above-described problems without using a special apparatus / process. and to provide an electrophotographic photosensitive member and an image forming apparatus includes a cylindrical substrate being processed using the processing methods of the working method and the cylindrical body of the cylindrical supports Ru with a core.

The inventions described in 請 Motomeko 1, when cutting a surface of the cylindrical substrate, a core used by inserting into the interior of the cylindrical body, and the shaft member, the shaft member Ri being inserted and supported in the center, the outer diameter is elastically deformed in the axial direction of the shaft member, and a vibration absorbing member to the inner surface of the cylindrical base body to elastically support, both surfaces of the vibration absorbing member are arranged in an auxiliary member for reinforcing the vibration absorbing member comprises a, the auxiliary member may be an elastic body.

The invention according to the invention of claim 2 is the core of claim 1, the ratio of the outer diameter of 5 0 to 95% of the auxiliary member to the inner diameter of the cylindrical substrate, preferably 60 to 90, further Preferably, it is 65 to 85.

The inventions of claim 3, in the core according to claim 1 or 2, wherein the vibration absorbing member, the rubber hardness of 50 to 95, is preferably 55 to 90, more preferably 60 to 80 It is characterized by that.

  The measuring method of rubber hardness was based on JIS K6301 (spring A type).

The inventions of claim 4, in core according to any one of claims 1乃optimum 3, wherein the vibration absorbing member protrudes radially outwardly radially from the center, in the circumferential direction equal A plurality of blades arranged at intervals are provided.

The inventions of claim 5, in the core according to claim 4, wherein the plurality of blades is characterized in that it is uniformly arranged in a circular circumferential shape.

The inventions of claim 6, in the processing method of the cylindrical substrate, the cylindrical substrate in a state in which the core according to inserted inside the cylindrical body in any one of claims 1 to 5 It has the process of cutting the surface of this.

The invention according to claim 7, an electrophotographic photosensitive member, characterized in that it comprises a cylindrical body which is processed using a processing method of a cylindrical substrate according to claim 6.

The invention according to claim 8, in the image forming apparatus, characterized by comprising an electrophotographic photosensitive member according to claim 7.

According to the present invention improves the contact pressure of the vibration absorbing member at the time of switching cutting machining, or subjected to a pretreatment of the cylindrical substrate before cutting, as described in the prior art, the cylindrical substrate in a special device I gripped it is not necessary or, easily can be machined with it it is possible to manufacture an electrophotographic photoreceptor substrate with high accuracy.

  In addition, it is possible to manufacture an electrophotographic photosensitive member substrate without causing the cylindrical substrate to come off from the core when being charged into or discharged from the processing machine.

  Furthermore, since the contact pressure of the vibration absorbing member during cutting can be improved and vibration can be suppressed, a highly accurate electrophotographic photosensitive member substrate can be manufactured.

Moreover, small vibration les is to provide a roundness accuracy better electrophotographic photosensitive member, the use of this electrophotographic photosensitive member, can be provided without imaging system color shift.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  Note that it is easy for a person skilled in the art to make other embodiments by changing or correcting the present invention within the scope of the claims, and these changes and modifications are included in the scope of the claims. The following description is an example of the best mode of the present invention, and does not limit the scope of the claims of the present invention.

FIG. 1 shows the configuration of the core A. The core A, when cutting a circular cylindrical substrate surface such as a photosensitive drum, with and inserted into the interior of the cylindrical substrate as the object to maintain a high accuracy of cutting, chatter vibration Used to effectively prevent occurrence. The core A has a configuration in which a cylindrical base body gripping portion 7 that grips the inner periphery of one end opening of the core A and the cylindrical base body introduction member 6 are connected by a shaft member 5, and the shaft member 5 has a predetermined pitch. Large-diameter vibration absorbing member 1, upper auxiliary member 2 and lower auxiliary member 3 that are attached to both sides of vibration absorbing member 1 and reinforce the force with which the vibration absorbing member comes into contact with the inner surface of the cylindrical substrate, and each member 1, 2. The spacer 4 which is arranged between the member groups consisting of 3 and maintains a predetermined interval is inserted and installed.

  Even if the vibration absorbing member is deformed when the core is inserted into the base as shown in FIG. 2 by fixing the vibration absorbing member on both sides of the auxiliary member, the vibration absorbing member falls off when the core is pulled out after the cutting is completed. There is no problem.

In other words, the cylindrical base gripping portion 7 and the cylindrical base introduction member 6 are fixed to both ends of the shaft member 5, respectively, and an elastic material is placed on the shaft member located between them in a predetermined arrangement. The plate-like vibration absorbing member 1 is inserted and supported through the center hole, and both sides of the vibration absorbing member 1 are reinforced by the upper auxiliary member 2 and the lower auxiliary member 3 and between these member groups 1, 2, and 3. The distance is kept constant by the spacer 4. The outer diameter of the vibration absorbing member 1 is, with is set larger than the inner diameter of the cylindrical substrate 8, the outer diameter portion is configured to be elastically deformed in the axial direction.

  The vibration absorbing member 1, the upper auxiliary member 2, the lower auxiliary member 3, and the spacer 4 are provided with holes that allow the shaft member 5 to pass through, and the axial direction when assembled into the state of the core A It is fixed so that it does not move.

  It is possible to cope with a change in the diameter or length of the substrate by appropriately combining a spacer and a portion that contacts the inner surface of the substrate comprising the vibration absorbing member and the auxiliary member.

  The upper auxiliary member 2 and the lower auxiliary member 3 may be disposed in close contact with both surfaces of the vibration absorbing member 1 or may be bonded. The upper auxiliary member 2 and the lower auxiliary member 3 may be made of a rubber material or other material having a predetermined elasticity, or may be made of a material having a rigidity that does not hinder the elastic deformation of the vibration absorbing member 1. May be configured.

  Specifically, it is a thin plate-like elastic body, and it is made of natural rubber, butadiene rubber, acrylic rubber, urethane rubber, neoprene rubber, etc., which are generally considered to have a high anti-vibration effect, and the form may or may not be foamed May be.

  FIG. 2 shows a state when the core A is inserted into the cylindrical base body 8. Since the outer diameter of the vibration absorbing member 1 is larger than the inner diameter of the cylindrical substrate 8, a part of the outer periphery of the vibration absorbing member 1 is brought into close contact with the inner wall of the cylindrical substrate 8 when the core is inserted into the cylindrical substrate 8. . When the outer periphery of the vibration absorbing member 1 is in close contact with the inner wall of the cylindrical substrate 8, chatter vibration is suppressed during cutting, and the cylindrical substrate for an electrophotographic photosensitive member can be processed with high accuracy.

  FIG. 3 shows a state when the cylindrical substrate is cut. The cylindrical base gripping part 10 is fitted in the other end opening of the cylindrical base 8 and is connected to a cutting machine main body (not shown) by a cutting machine connecting part 11. A cylindrical base body 8 (in the state shown in FIG. 2) in which the core A is inserted is mounted on a cutting machine (not shown) manually or by an automatic conveyance system (not shown). At this time, one end of the cylindrical base 8 is held by the cylindrical base holding part 7 of the core A, while the other non-held end is cut by the cutting machine connecting part 11. A cylindrical base body gripping part 10 connected to a main body (not shown) is mounted so as to be gripped.

  After the cylindrical base 8 is mounted on a cutting machine (not shown), a motor (not shown) attached to the cutting machine is driven, and the cylindrical base is rotated by a transmission device such as a belt or a chain. After the rotation of the cylindrical substrate is stabilized, the cutting tool 12 is moved on the surface of the cylindrical substrate 8 by moving the cutting tool 12 in the axial direction from the end of the cylindrical substrate.

  In FIG. 3, the cylindrical substrate introduction portion 6 and the cylindrical substrate gripping portion 10 are not in contact with each other during cutting, but there is no problem even if they are in contact. Further, one-side driving and two-side driving are known as driving methods, but the present invention is not limited to these driving methods.

  4A to 4C show typical examples of the shape and the number of blades of the vibration absorbing member. The vibration absorbing member 1 of (a) has a configuration in which four blades are assembled in a cross shape from the center hole, and the vibration absorbing member 1 of (b) has a configuration in which six blades are arranged at equal intervals in the circumferential direction. The vibration absorbing member 1 of (c) has a configuration in which eight blades are arranged at equal intervals. As long as the spacer 4 has a function for fixing the vibration absorbing member to an arbitrary position of the cylindrical base body, it is not necessary to define the material and shape. However, when a hard member is used for insertion into the cylindrical base 8, it is desirable that the outer diameter of the spacer is smaller than the inner diameter of the cylindrical base.

  By arranging the number of blades that protrude outward from the blades evenly around the circumference, the force applied to the inside can be evenly distributed even during cutting, so that the load is not biased in one direction during insertion and removal.

  In addition, the greater the number of blades projecting to the outside of the blade, the greater the effect of dispersing the force that holds the inner surface of the substrate. However, considering the insertion / removal of the core, the number of protrusions to the outside of the blade is preferably 4 to 8.

  The cylindrical substrate 8 used here is a metal drum such as aluminum, copper, iron, or zinc, and a known material can be used. Among these, an aluminum alloy is particularly preferable. Examples of the aluminum alloy include a JIS 1000 series aluminum alloy, a JIS 3000 series aluminum alloy, and a JIS 6000 series aluminum alloy. In addition to these aluminum alloys, magnesium alloys and nickel can also be applied, and even cylindrical bodies made of various polymer materials can be applied.

(Photoconductor)
The photoreceptor of the present invention comprises a photosensitive layer on the cylindrical substrate of the present invention, and further comprises other layers as necessary.

  In the first embodiment, the photoreceptor of the present invention comprises a cylindrical substrate and a single-layer type photosensitive layer provided on the substrate, and further includes a protective layer, an intermediate layer, and other layers as necessary. Do it.

  In the second embodiment, the photoreceptor of the present invention comprises a cylindrical substrate, and a laminated photosensitive layer having a charge generation layer and a charge transport layer at least in this order on the substrate. Accordingly, it has a protective layer, an intermediate layer, and other layers. In the second embodiment, the charge generation layer and the charge transport layer may be laminated in reverse.

-Multilayer type photosensitive layer-
The multilayer photosensitive layer described above has at least a charge generation layer and a charge transport layer in this order, and further includes a protective layer, an intermediate layer, and other layers as necessary.

  Further, the charge generation layer includes at least a charge generation material, and includes a binder resin and, if necessary, other components.

  There is no restriction | limiting in particular as a charge generation substance contained in this charge generation layer, Although it can select suitably according to the objective, Either an inorganic material and an organic material can be used.

  The inorganic material is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include crystalline selenium, amorphous selenium, selenium-tellurium, selenium-tellurium-halogen, and selenium-arsenic compounds. .

  Moreover, there is no restriction | limiting in particular as an organic material, According to the objective, it can select suitably according to the objective, for example, C-I Pigment Blue 25 (Color Index CI21180), C-I Pigment Red 41 (C.I. 21200), C.I.C. Red 52 (C.I. 45100), C.I. Basic Red 3 (C.I. 45210), azo pigments having a carbazole skeleton, azo pigments having a distyrylbenzene skeleton, triphenyl An azo pigment having an amine skeleton, an azo pigment having a dibenzothiophene skeleton, an azo pigment having an oxadiazole skeleton, an azo pigment having a fluorenone skeleton, an azo pigment having a bis-stilbene skeleton, an azo pigment having a distyryl oxadiazole skeleton, Has a distyrylcarbazole skeleton Azo pigments such as azo pigments; phthalocyanine pigments such as C.I. Pigment Blue 16 (C.I. 74100); indigo such as C. I.But Brown (C.I. 73410) and C. I.But Dye (C.I. 730.50) Pigments; perylene pigments such as Argol Scarlet 5 (manufactured by Bayer), Indusence Scarlet R (manufactured by Bayer); and squalic dyes. These may be used individually by 1 type and may use 2 or more types together.

  The binder resin contained in the charge generation layer is not particularly limited and may be appropriately selected depending on the purpose. For example, polyamide resin, polyurethane resin, epoxy resin, polyketone resin, polycarbonate resin, silicone resin , Acrylic resin, polyvinyl butyral resin, polyvinyl formal resin, polyvinyl ketone resin, polystyrene resin, poly-N-vinyl carbazole resin, polyacrylamide resin, and the like. These may be used individually by 1 type and may use 2 or more types together.

  If necessary, a charge transport material may be added. In addition to the binder resin described above, a polymer charge transport material can be added as the binder resin for the charge generation layer.

  In addition, as a method for forming the charge generation layer, a vacuum thin film preparation method and a casting method from a solution dispersion system can be largely mentioned.

  Examples of the former vacuum thin film production method include a glow discharge polymerization method, a vacuum deposition method, a CVD method, a sputtering method, a reactive sputtering method, an ion plating method, and an accelerated ion injection method. This vacuum thin film manufacturing method can satisfactorily form the inorganic material or organic material described above.

  In order to provide the charge generation layer by the latter casting method, a charge generation layer forming coating solution is used and a conventional method such as a dip coating method, a spray coating method, or a bead coating method is used. Can do.

  The organic solvent used in the above-described coating solution for forming a charge generation layer is not particularly limited and can be appropriately selected depending on the purpose. For example, acetone, methyl ethyl ketone, methyl isopropyl ketone, cyclohexanone, benzene, toluene, Xylene, chloroform, dichloromethane, dichloroethane, dichloropropane, trichloroethane, trichloroethylene, tetrachloroethane, tetrahydrofuran, dioxolane, dioxane, methanol, ethanol, isopropyl alcohol, butanol, ethyl acetate, butyl acetate, dimethyl sulfoxide, methyl cellosolve, ethyl cellosolve, propyl cellosolve , Etc. These may be used individually by 1 type and may use 2 or more types together.

  Among these, tetrahydrofuran, methyl ethyl ketone, dichloromethane, methanol, and ethanol having a boiling point of 40 ° C. to 80 ° C. are particularly preferable because they can be easily dried after coating.

  This coating solution for forming a charge generation layer is produced by dispersing and dissolving the above-described charge generation material and binder resin in these organic solvents. Examples of the method for dispersing the organic pigment in the organic solvent include a dispersion method using a dispersion medium such as a ball mill, a bead mill, a sand mill, and a vibration mill, and a high-speed liquid collision dispersion method.

  The thickness of the charge generation layer is usually preferably from 0.01 to 5 μm, more preferably from 0.05 to 2 μm.

  In addition, the charge transport layer included in the multi-layered photosensitive layer described above holds the charged charge and combines the charge generated and separated in the charge generation layer by exposure with the charged charge held. The target layer. In order to achieve the purpose of holding the charged charge, it is required that the electric resistance is high. Further, in order to achieve the purpose of obtaining a high surface potential with the charged charge that has been held, it is required that the dielectric constant is small and the charge mobility is good.

  This charge transport layer contains at least a charge transport material, and contains a binder resin and, if necessary, other components.

  Examples of the charge transport material include a hole transport material, an electron transport material, and a polymer charge transport material.

  Examples of the electron transporting substance (electron accepting substance) include chloroanil, bromanyl, tetracyanoethylene, tetracyanoquinodimethane, 2,4,7-trinitro-9-fluorenone, 2,4,5,7- Tetranitro-9-fluorenone, 2,4,5,7-tetranitroxanthone, 2,4,8-trinitrothioxanthone, 2,6,8-trinitro-4H-indeno [1,2-b] thiophene-4-one 1,3,7-trinitrodibenzothiophene-5,5-dioxide, and the like. These may be used individually by 1 type and may use 2 or more types together.

  Examples of the above hole transporting material (electron donating material) include oxazole derivatives, oxadiazole derivatives, imidazole derivatives, triphenylamine derivatives, 9- (p-diethylaminostyrylanthracene), 1,1-bis- ( 4-dibenzylaminophenyl) propane, styrylanthracene, styrylpyrazoline, phenylhydrazones, α-phenylstilbene derivatives, thiazole derivatives, triazole derivatives, phenazine derivatives, acridine derivatives, benzofuran derivatives, benzimidazole derivatives, thiophene derivatives, etc. Can be mentioned. These may be used individually by 1 type and may use 2 or more types together.

Moreover, what has the following structures is mentioned as said polymeric charge transport material.
(A) Polymer having carbazole ring For example, poly-N-vinylcarbazole, JP-A-50-82056, JP-A-54-9632, JP-A-54-11737, JP-A-4-175337 And the compounds described in JP-A-4-183719 and JP-A-6-234841.
(B) Polymer having a hydrazone structure For example, JP-A-57-78402, JP-A-61-20953, JP-A-61-296358, JP-A-1-134456, JP-A-1-134456 179164, JP-A-3-180851, JP-A-3-180852, JP-A-3-50555, JP-A-5-310904, JP-A-6-234840, and the like. Is done.
(C) Polysilylene polymer For example, JP-A-63-285552, JP-A-1-88461, JP-A-4-264130, JP-A-4-264131, JP-A-4-264132, Examples thereof include compounds described in Kaihei 4-264133 and JP-A-4-289867.
(D) Polymer having a triarylamine structure For example, N, N-bis (4-methylphenyl) -4-aminopolystyrene, JP-A-1-134457, JP-A-2-282264, JP-A-2- Examples include compounds described in JP-A-304456, JP-A-4-133605, JP-A-4-133066, JP-A-5-40350, and JP-A-5-202135.
(E) Other polymers For example, formaldehyde condensation polymer of nitropyrene, JP-A-51-73888, JP-A-56-150749, JP-A-6-234836, JP-A-6-234837 The described compounds and the like are exemplified.

  In addition to the above, the polymer charge transport material described above includes, for example, a polycarbonate resin having a triarylamine structure, a polyurethane resin having a triarylamine structure, a polyester resin having a triarylamine structure, and a triarylamine structure. And polyether resins having Examples of the polymer charge transporting material include, for example, JP-A 64-1728, JP-A 64-13061, JP-A 64-19049, JP-A-4-11627, JP-A 4-116627. JP 2225014, JP 4-230767, JP 4-320420, JP 5-232727, JP 7-56374, JP 9-127713, JP 9-222740. And compounds described in JP-A-9-265197, JP-A-9-211877, JP-A-9-30495, and the like.

  Examples of the polymer having an electron donating group include not only the above-mentioned polymer but also a copolymer with a known monomer, a block polymer, a graft polymer, a star polymer, It is also possible to use a crosslinked polymer having an electron donating group as disclosed in JP-A-109406.

  Examples of the binder resin described above include polycarbonate resin, polyester resin, methacrylic resin, acrylic resin, polyethylene resin, polyvinyl chloride resin, polyvinyl acetate resin, polystyrene resin, phenol resin, epoxy resin, polyurethane resin, and polychlorinated resin. Examples thereof include vinylidene resins, alkyd resins, silicone resins, polyvinyl carbazole resins, polyvinyl butyral resins, polyvinyl formal resins, polyacrylate resins, polyacrylamide resins, and phenoxy resins. These may be used individually by 1 type and may use 2 or more types together.

  Note that the above-described charge transport layer can also include a copolymer of a crosslinkable binder resin and a crosslinkable charge transport material.

  This charge transport layer can be formed by dissolving or dispersing these charge transport materials and a binder resin in a suitable solvent, and applying and drying them. In addition to the above-described charge transport material and binder resin, an appropriate amount of additives such as a plasticizer, an antioxidant, and a leveling agent can be added to the charge transport layer as necessary.

  The thickness of the above-described charge transport layer is not particularly limited and can be appropriately selected according to the purpose, and is preferably 5 to 100 μm. In view of the recent demand for higher image quality, the charge transport layer is made thinner. In order to achieve high image quality of 1200 dpi or more, 5 to 30 μm is more preferable.

-Single layer photosensitive layer-
This single-layer type photosensitive layer comprises a charge generation material, a charge transport material, a binder resin, and other components as required.

  The materials described above can be used as the charge generation material, the charge transport material, and the binder resin.

  Furthermore, examples of other components include plasticizers, fine particles, and various additives.

  The thickness of this single-layer type photosensitive layer is preferably 5 to 100 μm, more preferably 5 to 50 μm. When the film thickness is less than 5 μm, the chargeability may decrease, and when it exceeds 100 μm, the sensitivity may decrease.

  Further, a protective layer may be provided on the photosensitive layer as necessary. The protective layer contains at least a binder resin, a charge transport material, and, if necessary, other components.

  In addition, the above-described materials can be used as the binder resin and the charge transport material.

  Moreover, you may add various additives to the above-mentioned protective layer for the purpose of improving adhesiveness, smoothness, and chemical stability as needed.

  The thickness of the protective layer is not particularly limited and may be appropriately selected depending on the purpose. For example, it is preferably 1 to 15 μm, and more preferably 1 to 10 μm.

  An undercoat layer may be provided between the substrate and the photosensitive layer as necessary. This undercoat layer is provided for the purpose of improving adhesiveness, preventing moire, improving the coatability of the upper layer, and reducing residual potential.

  The undercoat layer contains at least a resin and fine powder, and further contains other components as necessary.

  Examples of the resin include water-soluble resins such as polyvinyl alcohol resin, casein, and sodium polyacrylate; alcohol-soluble resins such as copolymer nylon and methoxymethylated nylon; polyurethane resins, melamine resins, alkyd-melamine resins, and epoxy resins. And a curable resin that forms a three-dimensional network structure.

  Examples of the fine powder include metal oxides such as titanium oxide, silica, alumina, zirconium oxide, tin oxide, and indium oxide, metal sulfides, and metal nitrides.

  Moreover, there is no restriction | limiting in particular about the thickness of the undercoat layer mentioned above, According to the objective, it can select suitably, 0.1 thru | or 10 micrometers is preferable, and 1 thru | or 5 micrometers is more preferable.

  In the above-described photoreceptor, an intermediate layer may be provided on the substrate as necessary in order to improve adhesion and charge blocking properties. This intermediate layer has a resin as a main component. However, considering that the photosensitive layer is applied on the resin with a solvent, the intermediate layer is preferably a resin having a high solvent resistance to an organic solvent.

  As this resin, those similar to the above undercoat layer can be appropriately selected and used.

  Therefore, as described above, since the photoconductor of the present invention uses the high-precision photoconductor substrate of the present invention, an extremely high-precision photoconductor can be obtained, and image defects can be obtained using this photoconductor. In addition, it is possible to form an image with high resolution and full color output.

  EXAMPLES The present invention will be further described below with reference to examples, but the present invention is not limited thereto.

Example 1
An aluminum cylindrical substrate having an outer diameter of 60.4 mm, a total length of 352 mm, and a thickness of 1.0 mm is cut under the following conditions, and a cylindrical substrate having an outer diameter of 60.0 mm, a total length of 352 mm, and a thickness of 0.8 mm is continuously formed. 5000 were made.

  The vibration absorbing member 1 employs the number of blades: 4, blade length: 70 mm, wall thickness: 1.0 mm, hardness: 60, and the upper auxiliary member 2 has an outer diameter: 45 mm, wall thickness: 2. Adopting 0 mm and hardness: 80, the lower auxiliary member 3 adopted outer diameter: 45 mm, wall thickness: 2.0 mm, hardness: 80 and penetrated 15 pieces into the shaft member 5 to form a core.

Next, in a state where both ends of the cylindrical base are held by a collet chuck, turning is performed under the following turning conditions using a lathe (manufactured by Shoun Kogyo Co., Ltd., SPA 5 × 600) to obtain an outer diameter of 60 A cylindrical substrate having a thickness of 0.0 mm, a total length of 352 mm, and a wall thickness of 0.8 mm was produced.
<Turning conditions>
・ Rotation speed: 5000rpm
・ Feeding speed: 0.15mm / rev
-Bite shape: R bite Next, turning was performed under the same turning conditions, and the presence or absence of vibration and chatter of the cylindrical base body after turning was evaluated. Specifically, in the run-out measurement, the both ends of the cylindrical base after turning are held by a dedicated holding jig, and the knife is parallel to the straight line connecting the centers of the holding jigs set at both ends. Arranged the edges. A sensor (manufactured by KEYENC, LS7030) was placed and measured so as to be perpendicular to the straight line connecting the centers of the holding jigs.

  The distance between the surface of the cylindrical substrate after turning and the knife edge was 10 mm, and the run-out was measured by measuring the distance between the knife edge and the cylindrical substrate.

  For evaluation of chatter, the surface of the cylindrical substrate after turning was measured several times using a surface roughness measuring device (manufactured by Tokyo Seimitsu Co., Ltd., SURFCOM 1400).

(Example 2)
The vibration absorbing member 1 employs the number of blades: 5, blade length: 70 mm, wall thickness: 1.0 mm, hardness: 70, and the upper auxiliary member 2 has an outer diameter: 35 mm, wall thickness: 1. Adopting 0 mm and hardness: 80, the lower auxiliary member 3 adopts outer diameter: 35 mm, wall thickness: 1.0 mm, hardness: 70 and penetrates 20 pieces into the shaft member 5 to form a core, similar to Example 1. A sample was prepared and measured.

(Example 3)
The vibration absorbing member 1 employs the number of blades: 6, blade length: 65 mm, wall thickness: 1.0 mm, hardness: 80, and the upper auxiliary member 2 has an outer diameter: 55 mm, wall thickness: 1. 5 mm, hardness: 70 is adopted, and the lower auxiliary member 3 adopts an outer diameter: 40 mm, a wall thickness: 1.0 mm, hardness: 80, and 20 shafts 5 are passed through the shaft member 5 as a core. A sample was prepared and measured.

Example 4
The vibration absorbing member 1 adopts the number of blades: 8 blade length: 75 mm, wall thickness: 1.0 mm, hardness: 60, and the upper auxiliary member 2 has an outer diameter: 40 mm, wall thickness: 2. Adopting 0 mm and hardness: 70, and the lower auxiliary member 3 adopting outer diameter: 55 mm, wall thickness: 1.5 mm, hardness: 70 and penetrating 25 shaft members 5 as cores, the same as in Example 1. A sample was prepared and measured.

(Comparative Example 1)
A sample was prepared and measured in the same manner as in Example 1 without using the core.

(Comparative Example 2)
The vibration absorbing member 1 adopts the number of blades: 8, blade length: 70 mm, wall thickness: 1.0 mm, hardness: 40, and the upper auxiliary member 2 has an outer diameter: 25 mm, wall thickness: 2. Samples were prepared and measured in the same manner as in Example 1 by adopting 0 mm and a hardness of 70 to penetrate 20 shaft members 5 into cores.

  Table 1 shows the conditions of each core, and Table 2 shows the measurement results.

  The runout of the cylindrical substrate 8 after cutting was measured.

  Table 1: Core conditions

表２：切削結果

Table 2: Cutting results

画像出力結果
＜感光体の作製＞
次に、実施例１乃至４及び比較例１乃至２の各感光体用基体を洗浄した後、以下のようにして、これら感光体用基体上に、下引き層、電荷発生層、及び電荷輸送層を順次形成した。

Image output results <Production of photoconductor>
Next, after cleaning the photoreceptor substrates of Examples 1 to 4 and Comparative Examples 1 and 2, the undercoat layer, the charge generation layer, and the charge transport were formed on these photoreceptor substrates as follows. Layers were formed sequentially.

  First, an undercoat layer coating solution having the following composition was applied on each substrate by a dipping method. Next, the substrate was heated at 150 ° C. for 15 minutes and thermally cured to form an undercoat layer having a thickness of 5 μm on the substrate surface.

-Composition of coating liquid for undercoat layer-
Titanium oxide: 20 parts by mass Alkyd resin: 10 parts by mass Melamine resin: 10 parts by mass Methyl ethyl ketone: 60 parts by mass Next, a coating liquid for charge generation layer having the following composition is prepared. did. The obtained coating solution was applied onto the formed undercoat layer by the same dipping method and dried at 100 ° C. for 10 minutes to form a charge generation layer having a thickness of 0.02 μm.

-Composition of coating solution for charge generation layer-
-Butyral resin (UCC, XYHL)-1 part by mass-Titanyl phthalocyanine-9 parts by mass-Cyclohexanone-30 parts by mass-Tetrahydrofuran (THF)-30 parts by mass Next, the following composition A charge transport layer coating solution was prepared. The charge generation layer on which the obtained coating solution was formed was applied by the same dipping method and dried at 120 ° C. for 15 minutes to form a charge transport layer.

<Composition of coating solution for charge transport layer>
Polycarbonate resin (manufactured by Teijin Limited, Panlite K-1300) 10 parts by mass Charge transfer agent represented by the following structural formula: 10 parts by mass

・ジクロロメタン・・・８０質量部
最後に、両端にフランジを取り付けて、実施例１乃至４及び比較例１乃至２の各感光体を作製した。

-Dichloromethane ... 80 parts by mass Finally, flanges were attached to both ends, and the photoreceptors of Examples 1 to 4 and Comparative Examples 1 to 2 were produced.

  Next, each obtained photoconductor is mounted on a multi-function printer (printer / printer / fax) (Ricoh Co., Ltd., IMAGEIO NEO C 600), and a solid white, cyan halftone image, magenta halftone image, Five yellow halftone images and five black halftone images were printed, and the presence or absence of color shift and image abnormality was evaluated by visual observation. Table 3 shows the image evaluation results.

以上のように、本発明によれば、切削加工時における振動吸収部材と基体内面との接触圧力が向上し、切削加工前に円筒状基体の前処理を施したり、特殊な装置で円筒状基体を把持したりする必要がなくなり、容易に切削加工することが可能となり高精度の電子写真感光体用基体を製造することが可能となる。

As described above, according to the present invention improves the contact pressure between the vibration absorbing member and the base inner surface during switching-cutting machining, or subjected to a pretreatment of the cylindrical substrate before cutting, cylindrical with a special device it is not necessary or holding the substrate, easily can be machined with it it is possible to manufacture an electrophotographic photoreceptor substrate with high accuracy.

  In addition, it is possible to manufacture an electrophotographic photosensitive member substrate without causing the cylindrical substrate to come off from the core A when being charged into or discharged from the processing machine.

  Furthermore, since the contact pressure of the vibration absorbing member during cutting can be improved and vibration can be suppressed, a highly accurate electrophotographic photosensitive member substrate can be manufactured.

Moreover, small vibration les is to provide a roundness accuracy better electrophotographic photosensitive member, the use of this electrophotographic photosensitive member, can be provided without imaging system color shift.

The image forming apparatus includes a cylindrical substrate being processed using the processing methods of the working side Ho及 beauty the cylindrical body of the cylindrical supports Ru with a core of the present invention as an electrophotographic photosensitive member for a substrate (Copiers, printers, facsimiles, etc.) are also included within the scope of the present invention.

Although the embodiments of the present invention have been specifically described above, the present invention is not limited to these embodiments, and these embodiments of the present invention depart from the spirit and scope of the present invention. And can be changed or modified.

It is a block diagram of the core inserted in the photoreceptor cylindrical base | substrate of this invention. FIG. 3 is a cross-sectional view of the core of the present invention inserted into a photosensitive cylindrical substrate. FIG. 3 is a cross-sectional view of cutting after insertion into the photosensitive cylindrical substrate of the present invention. It is explanatory drawing of the blade | wing shape of the vibrational absorption member used for the core of this invention. It is explanatory drawing of the conventional core. (A) shows a configuration example of a non-sandwich core, (b) shows a state in which the core is inserted into a hollow cylindrical workpiece, and (c) shows a hollow cylindrical workpiece in which the core is inserted. It is explanatory drawing of the core which shows the state at the time of cutting.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vibration absorption member 2 Upper auxiliary member 3 Lower auxiliary member 4 Spacer 5 Shaft member 6 Cylindrical base | substrate introduction member 7 Cylindrical base | substrate holding | grip part at the time of cutting 8 Cylindrical base | substrate 9 Cutting machine connection part 10 Cylindrical base | substrate holding | grip at the time of cutting Part 11 Cutting machine connecting part 12 Bit 13 Auxiliary member 14 of vibration absorbing member Base 15 R Bit 16 Nozzle 17 Chip discharge hood 18 Anti-vibration member 19 Chip A Core

Claims (8)

When cutting the surface of the cylindrical substrate, a core used by being inserted into the cylindrical substrate,
A shaft member;
Are inserted and supported in the center Ri by the shaft member, and a vibration absorbing member outer diameter portion is elastically deformed in the axial direction of the shaft member, to support the inner surface of the cylindrical base elastically,
Are arranged on both sides of the vibration absorbing member comprises a an auxiliary member for reinforcing the vibration absorbing member,
The core is characterized in that the auxiliary member is an elastic body . The core according to claim 1 , wherein a ratio of an outer diameter of the auxiliary member to an inner diameter of the cylindrical base is 50 to 95%. The core according to claim 1 or 2, wherein the vibration absorbing member has a rubber hardness of 50 to 95. The vibration absorbing member protrudes radially outwards radially from the central portion, any one of claims 1 to 3, characterized in that it comprises a plurality of blades in the circumferential direction are arranged at regular intervals The core described in Wherein the plurality of blades, core according to claim 4, characterized in that they are arranged uniformly in a circular circumferential shape. Of the cylindrical substrate, characterized in that it comprises a step of cutting a surface of the cylindrical substrate in a state in which the core according to inserted inside the cylindrical body in any one of claims 1 to 5 Processing method. An electrophotographic photoreceptor comprising a cylindrical substrate processed using the cylindrical substrate processing method according to claim 6 . An image forming apparatus characterized by comprising an electrophotographic photosensitive member according to claim 7.

Images