JP2623119B2 - Electrophotographic photoreceptor manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing an electrophotographic photosensitive member.

In recent years, attempts have been made to develop an organic photoreceptor having high sensitivity and high durability by separately assigning a carrier generation function and a carrier transport function to different substances in a photosensitive layer of an electrophotographic photoreceptor. In such a so-called function-separated type electrophotographic photoreceptor, since a material exhibiting each function can be selected from a wide range, an electrophotographic photoreceptor having arbitrary characteristics can be relatively easily produced. It is possible.

When the photosensitive layer of such an electrophotographic photosensitive member is formed by coating, good sensitivity characteristics are maintained, image defects such as density unevenness are prevented, and good performance as a photosensitive member is exhibited. It is necessary to apply a layer.

Conventionally, various coating directions such as dip coating, spray coating, spinner coating, wire bar coating, blade coating, and roller coating have been known as methods for coating the photosensitive layer of an electrophotographic photoreceptor. Coating is used. Above all, dip coating is often used to apply and form a uniform coating film on an object to be coated (such as a conductive substrate) on a cylinder.

As described above, various studies have been made on the method of applying light to the electrophotographic photosensitive member, but sufficient studies have not necessarily been made on the method of supporting the photosensitive member base.

FIG. 10 shows a method of supporting a cylindrical conductive base drum for electrophotography (hereinafter, may be simply referred to as a base drum) on which a coating film such as a photosensitive layer is formed.

The coating liquid 1 is applied on the outer peripheral surface 4e of the base drum 4,
By drying, a coating film of a predetermined film layer is formed. Base drum 4
A lid 5 is attached to the upper end of the
, The substrate drum 4 is transferred from the coating tank while
It is placed on the surface 40a of the support 40. In some cases, the lid 5 is not attached. In this case, the inner peripheral surface of the base drum 4 is gripped from the inside. As a result, the base drum 4 is supported by the lower part 4f, and the coating liquid 1 on the base drum is dried to form a photosensitive layer.

However, the support structure (method) for the substrate drum as described above
Then, there are the above problems.

(A) Since the lower end face 4f of the base drum is in contact with the support base surface 40a, the undried coating liquid 1 adheres to the support base 40.

(B) Depending on the shape of the support, the base drum hollow portion 4c
Is dried, so that the drying of the coating liquid adhering to the inner peripheral surface 4d of the base drum is greatly delayed.

(C), as indicated by the dashed line, when placing the high their different base drum 4A on the support base, the height of the support base surface 4a to the substrate drum upper part would change to h _A from h . Therefore, the user holds the handle 5a of the lid 5 and holds the base drums 4, 4A.
When the robot is lifted or placed on the support table 40, it is necessary to reset the height of the holding means, and operation by a robot or the like is very complicated.

C. An object of the present invention is to provide an apparatus for manufacturing an electrophotographic photoreceptor capable of forming a photosensitive layer beautifully.

D. Configuration of the Invention A first invention is a structural device for an electrophotographic photoreceptor having a photosensitive layer provided on the surface of a cylindrical substrate, and has an outer diameter smaller than the inner diameter of the cylindrical substrate, and is erected. A plurality of shafts; a head portion larger than the shaft body formed at the upper end of the shaft body and smaller than the inner diameter of the cylindrical base; and a lid fitted and held in one opening of the base. An opening of the base, wherein the other opening of the base in which the lid is fitted and held is positioned on the head, an inner surface of the lid is supported by the head, and an opening of the base is provided. The present invention relates to an apparatus for manufacturing an electrophotographic photosensitive member, wherein the lower end is held without being grounded.

A second invention is an electrophotographic photoreceptor manufacturing apparatus in which a photosensitive layer is provided on the surface of a cylindrical substrate, wherein the plurality of shafts have an outer diameter smaller than the inner diameter of the cylindrical substrate, and are provided upright. A body, a head portion larger than the shaft body formed at the upper end of the shaft body, and smaller than the inner diameter of the cylindrical base body; and a lid body fitted and held in one opening of the base body, Coating means for applying a photosensitive liquid to the surface of the base; and transfer means for transferring the base applied by the coating means onto the head, wherein the lid is fitted and held, and The substrate on which the photosensitive liquid has been applied by the application unit is transferred onto the head unit by the transfer unit, the inner surface of the lid is supported by the head unit, and the lower end of the opening of the base is held without being grounded. The present invention relates to an apparatus for manufacturing an electrophotographic photosensitive member, It is.

E. Examples Hereinafter, examples of the present invention will be described.

1 to 3 show the first embodiment. FIG. 1 (a) is a schematic partial cross-sectional view showing a state where a substrate drum coated with a coating liquid is supported by a support of this example, and FIG. 1 (b) is Ib-I in FIG. 1 (a). FIG. 2 is a schematic partial sectional view showing a state where an uncoated base drum is supported by the support of this example, and FIG. 3 is a sectional view of the coating apparatus.

 First, the support structure of this example will be described.

The support base 40 is provided with support protrusions (shafts having an outer diameter smaller than the inner diameter of a base drum (cylindrical base) 4 to be described later) 41. A head portion 42 which is larger and smaller than the inner diameter of the base drum 4 is provided. From support surface 40a to support part 42
Height of the supporting surface 42a is set to h _0.

Then, as shown in FIG. 2, before the application of the base drum 4, the support protrusion 41 and the support portion 42 are inserted into the base drum hollow portion 4c, the support surface 42a is brought into contact with the lid 5, and the support Face 4
The lid 5 is supported by 2a. Thereby, the base drum 4
Is placed on the support surface 42a and is stably supported with the opening 4b facing downward.

Next, at the time of application of the base drum 4, the transfer tool 35 is lowered to a predetermined position above the base drum, and the hand 35a is operated by air pressure or the like from the state shown by the dashed line to the state shown by the solid line, and is gripped by the hand 35a. Hold the part 5a. Then, the transfer tool 35 is lifted to release the support of the base drum 4 and transferred to the position of the coating tank 2 shown in FIG.

A predetermined coating liquid 1 is contained in the coating tank 2, and at the time of dip coating, the transfer tool 35 is lowered to move the base drum 4.
Is dipped into the coating liquid 1 with the opening 4b facing downward, and then the base drum 4 is pulled up at a predetermined speed while holding the handle 5a of the lid 5. When the substrate drum 4 is immersed, the coating liquid 1 is immersed in 1b due to the air pressure filling the hollow portion 4c of the substrate drum.
Only penetrate to Therefore, in a region sandwiched between the outer peripheral surface 4e of the base drum and the inner peripheral surface 2b of the coating tank side wall, the liquid level rises to the position 1a, and the coating liquid 1 is applied to the outer peripheral surface 4e of the base drum to a predetermined position. Is formed.

At this time, usually, the coating liquid slightly penetrates into the hollow portion 4c of the base drum, and the coating solution also adheres to the lower end of the inner peripheral surface 4d of the hollow portion.

Next, the substrate drum 4 pulled up from the coating tank is transferred,
It is lowered to the support portion 42 shown in FIG. 1, and the support projection 41 and the support portion 42 are inserted into the hollow portion 4c of the base drum. And
When the lid 5 is placed on the support surface 42a, the transfer tool 35 is stopped, and the hand 35 is operated from the state shown by the solid line to the state shown by the dashed line to release the grip. Thereby, the base drum 4 coated with the coating liquid is supported in the same state as in FIG.
The coating liquid is dried. This drying may be natural drying at normal temperature, or may be heating drying or the like.

Incidentally, FIG. 1, in the second view, but also shows a state in which the base drum 4A supported height h _A, the base drum
4A is handled in the same manner as the above-described base drum 4.

According to the support structure and the drying device of the present example, the following effects can be obtained.

(A) Since the base drum 4f does not contact the support surface 40a, the undried coating liquid 1 does not contact the support 40 and does not adhere thereto.

(B) Since the base drum opening 4b is open to the outside air, the coating liquid 1 adhering to the inner peripheral surface 4d of the hollow portion is also quickly dried.

(C), since performing support base drum 4 by placing the lid 5 on the support 42, the height h ₀ is determined from the support base surface 4a to the lid 5 by the height of the supporting surface 42a Is done.
Therefore, even when the base drums 4 and 4A having different heights are used, the height of the holding position by the transfer tool 35 is constant. Therefore, it is not necessary to reset the gripping position even for the substrate drums having different dimensions, the processing can be performed continuously, the operation is easy, and the invention is suitable for automatic control of an industrial robot or the like. As a result, the operation rate of the device can be increased, and productivity can be increased and cost can be reduced.

(D) When the drum 4 is simply placed on the support 40,
Since the base drum 4 has a cylindrical elongated shape, the support stability is poor, and there is a possibility that the base drum 4 may fall onto the support base 40.

On the other hand, in the support structure of the present example, the support protrusion 41 and the support portion 42 are inserted into and supported by the base drum hollow portion 4c. Good stability. This is particularly important when supporting the substrate drum 4 on which coating has been completed.

In this example, the base drum was supported by the support structure of the present embodiment before and after the coating of the base drum during application, but the support structure of the present embodiment can be used in other steps as well.

 FIG. 4 shows another coating apparatus.

The supporting structure of the base drum, the drying method, and the transferring method are the same as those in the examples of FIGS. 1 to 3, and the description thereof is omitted. This is the same in the examples of FIGS. 5 and 6 described later.

An application liquid discharge port 17 and an application liquid supply port 7 are provided on the application tank bottom wall 2c, and the base drum 4 is fixed at a predetermined position in the application tank 2. Next, the coating liquid 1 in the tank 12 is supplied from the supply port 7 through the filter 3 by the liquid sending pump ( _PIN ) 10B, and the coating liquid level is changed from the position 1c indicated by the dashed line to the position 1a indicated by the solid line.
To rise to. Thereafter, the drainage pump (Pout) 10A is driven to discharge the coating liquid 1 from the discharge port 17 and to flow into the tank 12. Thus, a film is formed on the outer peripheral surface 4e of the base drum.

In this example, in addition to the effects (a) to (d) described above, the coating liquid 1 is discharged by a constant-rate pump to form a coating film. Therefore, there is no problem such as vibration caused by pulling up the substrate drum. A uniform coating film can be formed.

FIG. 5 is a schematic sectional view of a so-called overflow coating apparatus.

A predetermined coating solution 1 is contained in the coating tank 2,
A saucer 6 is provided around the side wall 2d of the tray. The coating liquid 1 is sent out of the tank 12 by a pump (P) 10, supplied through a filter (F) 3 from a supply port 7 into the coating tank 2, and further over the upper edge 2 e of the side wall 2 d. The fluid overflows from the circumference of the coating tank 2, is collected by the receiving tray 6, and is discharged from the discharge port 8 to the tank 12. The cylindrical conductive substrate 4 is immersed in the coating liquid 1, and then the conductive substrate (hereinafter, referred to as a conductive substrate).
It may be called a substrate drum. 4) is lifted at a predetermined speed by the transfer means 35, and is subjected to dip coating.
During the dip coating, the coating liquid 1 is applied to the side wall 2d as described above.
, Overflowing beyond the upper edge portion 2e, the height of the coating liquid level is kept constant.

According to this example, in addition to the effects (a) to (d) described above, since the height of the coating liquid level is kept constant, a dried product is generated on the inner peripheral surface of the coating tank side wall. No foreign matter defect due to this can be prevented.

FIG. 6 (a) is a schematic partial sectional view showing still another coating apparatus, and FIG. 6 (b) is a sectional view taken along the line VIb-VIb in FIG. 6 (a).

In this example, the outer wall 15 is provided concentrically at a constant interval on the outer periphery of the coating tank side wall 2d, and the coating liquid receiving portion 11 is provided in a region sandwiched between the coating tank side wall 2d and the outer wall 15. It has a distinctive feature.

That is, the coating solution 1 contained in the coating tank 2 uniformly flows over the upper edge 2e of the coating tank side wall in the outer circumferential direction, and flows down at a low speed while forming a thin film along the shape while wetting the side wall outer circumference 2a. I do.

The coating liquid receiving section 11 also functions as a coating liquid storage section for storing the coating liquid, that is, a kind of coating liquid reservoir, and the coating liquid 1 flowing down along the side wall outer periphery 2a receives the coating liquid as shown in the drawing. Housed at the bottom of 11. A discharge port 17 is provided at the lowermost end of the coating liquid receiving section 11, and the coating liquid 1 once stored in the coating liquid receiving section 11 is discharged from the discharging port 17, and the pump 10,
The liquid is supplied from the supply port 7 into the coating tank 2 via the filter 3.

In this example, the following effects can be obtained in addition to the effects (a) to (d).

(G) Since the coating liquid flows down along the outer periphery of the coating tank side wall, the flowing area is very large, and the coating liquid flows down while wetting the outer circumference of the coating tank side wall. Therefore, as a result, the flow rate of the coating liquid is extremely low, and the coating liquid flows down gently, so that there is no possibility of bubbles being trapped. What is particularly noteworthy is that, even when the base drum is immersed, the flow speed can be reduced due to the size of the flow area and the flow of the coating liquid can be made quiet.

For this reason, a concave coating defect due to bubbles does not occur, and a uniform coating film can be formed with high productivity. Needless to say, the advantages of the conventional overflow type coating apparatus such as prevention of foreign matter defects can be fully enjoyed.

(H) Since the coating liquid discharged from the discharge port is supplied from the supply port into the coating tank without passing through a coating liquid storage tank such as a tank, there is no need to separately provide a tank or the like. There is no need to take up extra space, and it is possible to reduce the size of the device and thus reduce the cost.

(I) Since the coating liquid receiving portion is provided concentrically on the outer periphery of the side wall of the coating tank, and both are integrated, the temperature and the like can be integrally controlled when temperature control or the like is performed.

7 to 9 each show an example of the electrophotographic photosensitive member supported by the support structure of the present invention and processed by the processing apparatus.

FIG. 7 shows that in the photoconductor, the first
A carrier generation layer 51 is provided as a layer,
On the carrier 51, a carrier transport layer 52 is provided as a second layer. The photoreceptor shown in FIG. 8 has a carrier transport layer 52 as a first layer and a carrier generation layer 51 as a second layer sequentially laminated as viewed from the conductive substrate 50 side. The photoreceptor in FIG.
The first layer has a single-layer photosensitive layer 53 containing both a carrier-generating substance and a carrier-transporting substance.

Of course, the number and types of the coating layers formed by the coating apparatus of the present invention are not limited to the examples shown in FIGS. 7 to 9, and the composition and function are not particularly limited. It can be set freely according to the setting intention.

For example, when viewed from the conductive substrate side, the first layer and the second layer are undercoat layers, those having a single-layered photosensitive layer, those having a single-layered photosensitive layer, those having a protective layer, the first layer, and the first layer. The two layers and the third layer are an undercoat layer, a carrier transport layer, and a carrier generation layer, respectively, the carrier generation layer, the carrier transport layer, and the protection layer, the first layer, the second layer, the third layer, and the third layer. Four layers each being an undercoat layer, a carrier generation layer, a carrier transport layer, a protective layer, or an undercoat layer, a carrier transport layer, a carrier generation layer,
Examples of the protective layer include a protective layer.

Subbing layer is acrylic, methacrylic, vinyl chloride,
Vinyl acetate, epoxy, polyurethane, phenol, polyester, liquid, polycarbonate, silicon, melamine, vinyl chloride / vinyl acetate copolymer, vinyl chloride / vinyl acetate / maleic anhydride copolymer, etc. Of various resins.

The carrier generation layer is, for example, a monoazo dye, a disazo dye, an azo dye such as a trisazo dye, a perylene dye such as perylene anhydride, a perylene imide, an indigo dye such as indigo, thioindigo, anthraquinone, pyrenequinone, and flapanthrones. Formed from phthalocyanine pigments such as polycyclic quinones, quinacridone pigments, bisbenzimidazole pigments, indathrone pigments, squarililic pigments, metal phthalocyanines, metal-free phthalocyanines, pyrylium salt pigments, thiapyrylium salt pigments and polycarbonates It can be formed by dissolving or decomposing various known carrier generating substances such as a eutectic complex together with a suitable binder resin and, if necessary, a carrier transporting substance in a solvent and applying the solution.

The carrier transporting layer may be, for example, an electron-accepting substance that easily transports electrons such as trinitrofluorenone or tetranitrofluorene, a polymer having a heterocyclic compound represented by poly-N-vinylcarbazole in a side chain, or a triazole. Various known holes such as derivatives, oxadiazole derivatives, imidazole-derivatives, pyrazoline derivatives, polyarylalkane derivatives, phenylenediamine derivatives, hydrazone derivatives, amino-substituted chalcone derivatives, triarylamine derivatives, carbazole derivatives, stilbene derivatives, and phenothiazine derivatives Can be formed by dissolving a carrier-transporting substance that can easily transport the compound together with a suitable binder resin in a solvent, coating and drying.

The photosensitive layer having a single-layer structure can be formed by dissolving or dispersing the above-mentioned carrier-generating substance in a solvent together with a suitable carrier-transporting substance and a binder resin, and applying the same.

As the above binder resin, for example, polycarbonate, polyester, methacrylic resin, acrylic resin,
Polyvinyl chloride, polyvinylidene chloride, polystyrene,
Polyvinyl acetate, styrene copolymer resin (for example, styrene-butadiene copolymer, styrene-methyl methacrylate copolymer), acrylonitrile copolymer resin (for example, vinylidene chloride-acrylonitrile copolymer, etc.), vinyl chloride-vinyl acetate copolymer Polymer, vinyl chloride
Vinyl acetate-maleic anhydride copolymer, silicone resin,
Silicone-alkyd resin, phenol resin (for example, phenol-formaldehyde resin, m-cresol-formaldehyde resin, etc.), styrene-alkyd resin,
Film-forming high-molecular polymers such as poly-N-vinylcarbazole, polyvinyl butyral, and polyvinyl formate are preferred.

Further, the protective layer is polyurethane, polyethylene, polypropylene, acrylic resin, methacrylic resin, vinyl chloride resin as the carrier transporting substance and the binder resin,
Vinyl acetate resin, epoxy resin, phenol resin, polyester resin, polycarbonate resin, silicone resin,
It can be formed of a melamine resin or the like, or a copolymer resin or the like containing two or more of the repeating units of these resins.

Solvents used for coating and forming the carrier transport layer, the carrier generation layer, and the like include acetone, methyl ethyl ketone, cyclohexanone, benzene, toluene, xylene, chloroform, dichloromethane, 1,2-dichloroethane, and 1,1,2-trichloroethane. , 1,1,2,2-tetrachloroethane, 1,1,2-trichloropropane, 1,1,2,2-tetrachloropropane, 1,2,3-trichloropropane, 1,1,2
-Trichlorobutane, 1,2,3,4-tetrachlorobutane,
Tetrahydrofuran, monochlorobenzene, dichlorobenzene, dioxane, methanol, ethanol, isopropanol, ethyl acetate, butyl acetate, dimethyl sulfoxide, methylcellosolve acetate, n-butylamine, diethylamine, ethylenediamine, isopropanolamine, triethanolamine, triethenediamine , N, N-dimethylformamide and the like.

Further, as a solvent for dissolving the carrier transporting material and the binder resin to form a coating solution, a solvent capable of uniformly dissolving these is selected, and the boiling point (bp) is 80 ° C or more.
Those at 150 ° C are preferred, and those at 90 ° C to 120 ° C are more preferred. If the boiling point is less than 80 ° C., drying is too quick to cause dew condensation and brushing is likely to occur. In addition, drying is too fast to perform leveling and a smooth photosensitive layer is not easily obtained. Also, 150
If the temperature exceeds ℃, dripping and uneven coating are likely to occur. Specifically, dichloromethane, 1,2-dichloroethane (bp = 83.5
° C), 1,1,2-trichloroethane (bp = 113.5 ° C), 1,4
-Dioxane (bp = 101.3 ° C), benzene (bp = 80.1
° C), toluene (bp = 110.6 ° C), o, m, p-xylene (bp
= 138-144 ° C) tetrahydrofuran, dioxane, monochlorobenzene and the like. In addition, the boiling point is 80 ℃ ~ 15
Even with a solvent outside the range of 0 ° C., the boiling point can be adjusted by mixing a high-boiling solvent and a low-boiling solvent.

Further, the carrier generation layer, as a solvent for forming a photosensitive layer having a single-layer structure, dissolves a binder resin and optionally a carrier transporting substance, and the carrier generating substance is preferably 2 μm or less, more preferably 1 μm or less. When a lower carrier transporting layer, an undercoating layer, and the like are present, a material capable of dispersing in a fine particle state and supplying a stable dispersion liquid is selected so as not to unduly dissolve or swell. In particular, among the above, toluene, chloroform, dichloromethane, 1,2-dichloroethane, 1,1,2-trichloroethane, 1,1,2,2-tetrachloroethane, tetrahydrofuran-monochlorobenzene, and dioxane are carrier generation layers. , A preferred solvent for any of the carrier transport layers.

The coating liquid used in the present invention may contain other substances other than those described above. For example, when a siloxane-based compound is contained, there is an effect that the coated surface is smoothed. Examples of the siloxane compound include dimethylpolysiloxane and methylphenylpolysiloxane. The addition amount is preferably from 1 to 10,000 ppm, more preferably from 10 to 1000 ppm, based on the total amount of the coating solution.

In the photosensitive layer, an electron accepting substance such as succinic anhydride, maleic anhydride, or phthalic anhydride is preferably used for the purpose of reducing residual potential and memory, preferably a carrier generating substance.
It can be added at a ratio of 0.1 to 100 parts by weight per 100 parts by weight. Further, if necessary, an organic amine such as butylamine or diisobutylamine may be contained in the photosensitive layer in a mole number equal to or less than the mole number of the carrier generating substance for the purpose of improving sensitivity and reducing memory.

In addition, it is also possible to form a photoreceptor by using the same binder resin and the same solvent for the coating liquid for the carrier transport layer and the coating liquid for the carrier generation layer, and in this case, the productivity and performance of the photoreceptor can be improved. Has the advantage of being further improved. In other words, if the same binder resin can be used, the barrier between the carrier generation layer and the carrier transport layer is reduced, and the carriers generated during light irradiation are smoothly injected and transported into the carrier transport layer. Characteristics and the like are also improved.

Furthermore, if the same binder resin, solvent, and the like can be used in common, there is an advantage that coating processing is easy, accurate, and high-speed.

The shape and material of the conductive substrate are not particularly limited, but the same shape is preferably used. Also,
Examples of the material include a metal plate such as an aluminum alloy, a metal drum, or a conductive polymer, a conductive compound such as indium oxide, or a conductive thin layer made of a metal such as aluminum, palladium, or gold. Thus, a material provided on a substrate such as paper or a plastic film is used.

In forming the carrier generation layer and the photosensitive layer having a single layer structure, more specifically, the following method is selected.

(A) A method in which a solution in which a carrier-generating substance is dissolved in an appropriate solvent or a solution in which a binder is added thereto and mixed and dissolved is applied.

(B) A method in which a carrier-generating substance is made into fine particles in a dispersion medium by a ball mill, a homomixer, or the like, and a binder is added, if necessary, and mixed and dispersed, and a dispersion liquid obtained by coating is applied.

In these methods, when the particles are dispersed under the action of ultrasonic waves, uniform dispersion becomes possible.

The viscosity of the coating solution for forming the photoreceptor constituting layers such as the photosensitive layer, the undercoat layer and the protective layer is preferably in the range of 5 to 500 cp (centipoise), more preferably in the range of 10 to 300 cp. . If the viscosity is less than the above range, it is easy to cause sagging in the coating film, the lower portion tends to be thicker than the upper portion of the drum, and if the viscosity is larger than the above range, the viscosity of the coating solution in the coating tank tends to be uneven. In addition, there is a tendency that film thickness unevenness occurs in the coating film.

When forming the photosensitive member forming tank, a coating method such as blade coating, spray coating, or spiral coating may be used in combination.

As described above, the present invention has been exemplified, but the embodiment of the present invention is not limited to the above-described embodiment, and various modifications are possible.

For example, the configuration, shape, dimensions, and the like of the transfer tool and the hand can be variously changed, and the drive means can use a motor in addition to the air pressure. The shape and the like of the grip portion of the lid can also be changed. In this case, the shape and the like of the hand can be changed accordingly.

The shapes, dimensions, and the like of the support projections and the support portions can be variously varied.
Further, the shape of the support surface may be not only a flat surface, but also a curved surface, a sawtooth surface, a corrugated surface, or the like.

F. Advantageous Effects of the Invention According to the present invention, it is possible to grip the cylindrical object at a position at a fixed distance from the predetermined position even if the dimensions and the like of the cylindrical object are changed. Therefore, there is no need to reset the gripping position, the operation is easy, continuous processing can be performed, and productivity can be improved and cost can be reduced.

In addition, since the support means is inserted into the internal space of the cylindrical object to be coated, the support of the cylindrical object to be coated is more reliable, and the support is not easily released.

[Brief description of the drawings]

1 to 9 show an embodiment, and FIG. 1 (a) is a schematic partial sectional view showing a state in which a base drum coated with a coating liquid is supported by a support. (B) is a cross-sectional view taken along the line Ib-Ib in FIG. (A), FIG. 2 is a schematic partial cross-sectional view showing a state where an uncoated base drum is supported, FIG. 3 and FIG. , FIG. 5 is a schematic partial cross-sectional view showing a coating apparatus, FIG. 6 (a) is a schematic partial cross-sectional view showing another coating apparatus, and FIG. 6 (b) is VIb-VIb in FIG. 7, 8 and 9 are partial cross-sectional views each showing an example of the electrophotographic photosensitive member. FIG. 10 is a sectional view showing a conventional support structure. In the reference numerals shown in the drawings, 1... Coating liquid 4... Substrate drum 4 b... Substrate drum hollow portion opening 4 c ... substrate drum hollow portion 4 d ... substrate drum hollow portion inner peripheral surface 4 f. … Lid 5a… Grip part 35… Transfer tool 35a… Hand 40… Support base 41… Support projection 42… Support part 42a… Support surface.

Continued on the front page (72) Inventor Kazuyuki Shimizu, Konica Corporation, 1 Sakuracho, Hino-shi, Tokyo (72) Inventor Akira Ohira 2970, Ishikawacho, Hachioji-shi, Tokyo Konica Corporation (56) References Special Kaisho 63-77567 (JP, A)

Claims (2)

(57) [Claims] 1. An electrophotographic photoreceptor manufacturing apparatus, comprising a cylindrical substrate provided with a photosensitive layer on a surface thereof, wherein the plurality of shafts have an outer diameter smaller than the inner diameter of the cylindrical substrate and are provided upright. A head portion larger than the shaft body formed at the upper end of the shaft body and smaller than the inner diameter of the cylindrical base; and a lid fitted and held in one opening of the base. The other opening of the base with the lid fitted and held is positioned on the head, the inner surface of the lid is supported by the head, and the lower end of the opening of the base does not touch the ground. An apparatus for manufacturing an electrophotographic photoreceptor, wherein the apparatus is configured to be held by the above. 2. An apparatus for manufacturing an electrophotographic photoreceptor having a photosensitive layer provided on a surface of a cylindrical substrate, comprising: a plurality of shafts having an outer diameter smaller than an inner diameter of the cylindrical substrate and standing upright. A head portion which is larger than the shaft body formed at the upper end of the shaft body and smaller than the inner diameter of the cylindrical base; a lid fitted and held in one opening of the base; Coating means for applying a liquid to the surface of the base, and transfer means for transferring the base applied by the photosensitive means onto the head portion, wherein the lid is fitted and held, and The substrate on which the photosensitive liquid has been applied by the application unit is transferred onto the head unit by the transfer unit, the inner surface of the lid is supported by the head unit, and the lower end of the opening of the base is held without being grounded. An apparatus for manufacturing an electrophotographic photoreceptor, wherein the apparatus is configured as described above.