JPH0214774A - Structure for supporting cylindrical body to be coated and its treating device - Google Patents

Abstract

PURPOSE:To hold a cylindrical body to be coated at a fixed distance from a specified position even if the dimensions of the body are changed by supporting the body at the specified position on the wall surface of an internal space of the body. CONSTITUTION:A supporting protrusion 41 erected on a supporting base 40, a truncated conical supporting part 42 on the upper end of the protrusion 41, and the supporting surface 42a of the supporting part 42 are provided as the means for supporting the cylindrical body 4 to be coated having an internal space 4c. The supporting means is inserted into the internal space 4c to support the body 4 at a specified position on the wall surface 5 of the internal space 4c. As a result, the body 4 can be held at a fixed distance from the specified position even if the dimensions of the body 4 are changed. Accordingly, the holding position need not be reset, operation is facilitated, and the treatment can be continuously carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a support structure for a cylindrical object to be coated and a processing apparatus therefor.

In recent years, attempts have been made to develop organic photoreceptors with high sensitivity and durability by assigning the carrier generation function and carrier transport function to different substances in the photosensitive layer of electrophotographic photosensitive materials. . In such so-called function-separated type electrophotographic photoreceptors, substances that exhibit each function can be selected from a wide range of materials, so it is relatively easy to produce electrophotographic photoreceptors with arbitrary characteristics. Is possible.

When coating and forming the photosensitive layer of such an electrophotographic photoreceptor, it is necessary to form a thin, uniform layer with high precision in order to maintain good sensitivity characteristics and prevent image defects such as density unevenness, thereby exhibiting good performance as a photoreceptor. It is necessary to apply a layer.

Conventionally, various coating methods such as dip coating, spray coating, spinner coating, wire bar coating, blade coating, and roller coating have been known as coating methods for the photosensitive layer of electrophotographic photoreceptors, but dip coating and spray coating are the main methods. Coating is used.

Among these, dip coating is often used to form a uniform coating on a cylindrical object (such as a conductive substrate).

As described above, various studies have been made on the method of coating the photosensitive layer of an electrophotographic photoreceptor, but sufficient studies have not necessarily been made on the method of supporting the photoreceptor substrate.

FIG. 10 shows a method of supporting a cylindrical conductive base drum for an electrophotographic photoreceptor (hereinafter sometimes 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 onto the outer circumferential surface 4e of the base drum 4,
A coating film with a predetermined thickness is formed by drying.

An M5 is attached to the upper end of the base drum 4, and as will be described later, the handle 5a of the lid 5 is gripped to transfer the base drum 4 from the coating tank and placed on the surface 40a of the support base 40.

Furthermore, M5 may not be attached, and in this case, the inner circumferential surface of the base drum 4 is gripped from inside. Thereby, the base drum 4 is supported by the lower end 4f, the coating liquid 1 on the base drum is dried, and a photosensitive layer is formed.

However, the support structure (method) for the base drum as described above has the above-mentioned problems.

(a), the undried coating liquid 1 adheres to the support base 40 because the base drum lower end surface 4f and the support base surface 40a are in contact with each other.

(b) Depending on the shape of the support base, the hollow part of the base drum 4
Since the area c is sealed, the drying of the coating liquid adhering to the inner circumferential surface 4d of the base drum is extremely delayed.

(C) - As shown by the dotted chain line, when the base drums 4A of different heights are placed on the support stand, the height from the support stand surface 4a to the upper end of the base drum changes from h to hA. Put it away. Therefore, when lifting the base drum 4.4A by gripping the handle 5a of the lid 5 or placing it on the support stand 40, it is necessary to reset the height of the holding means.
Operation by a robot or the like is extremely complicated.

C.2 Purpose of the Invention The first object of the invention is to provide a support structure for a cylindrical object to be coated that can maintain a predetermined position even when the size of the cylindrical object changes.

In addition to the above object, a second object of the invention is to provide a processing apparatus for a cylindrical object in which the untreated coating liquid applied to the cylindrical object does not adhere to a support stand or the like. .

The present invention relates to a support structure for a cylindrical object to be coated, including a support means inserted into the inner space and supporting the cylindrical object at a predetermined position on a wall surface of the inner space.

A second aspect of the present invention includes an application unit that applies a coating liquid to a cylindrical object having an internal space; a supporting means is inserted into the internal space, and the supporting means supports the cylinder at a predetermined position on a wall surface of the internal space. a processing section that supports the cylindrical object and performs a predetermined treatment on the cylindrical object; and a transfer means that transports the cylindrical object from the application section to the processing section. The present invention relates to a processing apparatus for a cylindrical object to be coated.

Here, the "wall surface of the internal space" refers to the wall surface of the internal space, and includes not only the wall surface of the object to be coated itself, but also, for example, the wall surface of the object holding member.

E, Example The present invention will be explained in detail below.

1 to 3 show a first embodiment. 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 the support of this example, and FIG. 1(b) is a line Ib-Ib in FIG. 1(a). Arrow sectional view, 2nd
The figure is a schematic partial sectional view showing a state in which an uncoated base drum is supported by the support of this example, and FIG. 3 is a sectional view of the coating device.

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

The support base 40 is provided with a support protrusion 41.
A truncated cone-shaped support portion 42 is provided at the upper end of the support portion 42 .
The height from the support surface 40a to the support surface 42a of the support portion 42 is set to ho.

As shown in FIG. 2, in the state before coating the base drum 4, the support protrusion 41 and the support part 42 are inserted into the base drum hollow part 4c, the support surface 42a is brought into contact with the lid 5,
M5 is supported by the support surface 42a.

Thereby, the base drum 4 is placed on the support surface 42a and stably supported with the opening 4b facing downward.

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

A predetermined coating liquid 1 is stored in the coating tank 2, and during dip coating, a transfer tool 35 is lowered to transfer the coating liquid 1 to the base drum 4.
is immersed in the coating liquid 1 with the opening 4b facing downward, and then the base drum 4 is pulled up at a predetermined speed while gripping the handle 5a of the lid 5.

When the base drum 4 is immersed, the coating liquid 1 only penetrates up to 1b due to the air pressure filling the base drum hollow section 4C. Therefore, in the area sandwiched between the base drum outer peripheral surface 4e and the coating tank side wall inner peripheral surface 2b, the liquid level is at position 1.
a, and the coating liquid 1 is applied to the outer circumferential surface 4e of the base drum up to a predetermined position, thereby forming a coating film.

At this time, the coating liquid usually enters the hollow portion 4c of the base drum to some extent, and also adheres to the lower end portion of the inner circumferential surface 4d of the hollow portion.

Next, the base drum 4 pulled up from the coating tank is transferred and lowered to the support part 42 shown in FIG. 1, and the support protrusion 41 and the support part 42 are inserted into the base drum hollow part 4C.
Then, when the M5 is placed R on the support surface 42a, the transfer tool 3
5 is stopped, and the grip is released by moving the hand 35 from the state shown by the solid line to the state shown by the one-dot chain line. As a result, the base drum 4 coated with the coating liquid is supported in a state similar to that shown in FIG. 2, and the coating liquid is dried. This drying may be done by natural drying at room temperature, heat drying, or the like.

Note that although FIGS. 1 and 2 also show a supported state of the base drum 4A having a height hA, this base drum 4A is also handled in the same manner as the base drum 4 described above.

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

(a) Since the base drum end 4f does not contact the support surface 40a, the undried coating liquid 1 does not come into contact with the support 40 and does not adhere to it.

(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 also dries quickly.

(C) Since the base drum 4 is supported by placing the lid 5 on the support part 42, the height from the support surface 4a to the lid 5 is determined by the height of the support surface 42a. Ru. Therefore, even when base drums 4.4A of different heights are used, the height of the gripping position by the transfer tool 35 remains constant. Therefore, there is no need to reset the gripping position even for base drums of different dimensions, and processing can be performed continuously, making the operation easy and suitable for automatic control of industrial robots and the like. This increases equipment availability and
It is possible to increase productivity and reduce costs.

(d) If the base drum 4 is simply placed on the support base 40, the support stability is poor because the base drum 4 has an elongated cylindrical shape, and there is a risk of it falling onto the support base 40. there were.

On the other hand, in the support structure of this example, the support protrusion 41 and the support part 42 are inserted into the base drum hollow part 4c for support, so there is no fear that the base drum 4 will fall down, and the support is significantly improved. Good stability. This is particularly important when supporting the base drum 4 after coating.

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

FIG. 4 shows another coating device.

The support structure, drying method, and transfer method of the base drum are the same as those in the examples shown in FIGS. 1 to 3, and their explanations will be omitted. This point also applies to the examples shown in FIGS. 5 and 6, which will be described later.

A coating liquid outlet 17 and a coating liquid supply lower are provided on the coating tank bottom wall 2C, and the base drum 4 is fixed at a predetermined position in the coating tank 2. Next, the liquid supply pump (P+s) IOB supplies the coating liquid 1 in the tank 12 from the supply lower via the filter 3, and the liquid level of the coating liquid is moved from position 1c shown by the dashed line to position 1a shown by the solid line. raise. After this, the drain pump (Pout) IOA is driven and the drain port 17
The coating liquid 1 is then discharged and allowed to flow into the tank 12.

As a result, a coating film is formed on the outer peripheral surface 4e of the base drum.

In this example, in addition to achieving the effects (a) to (d) above, the application also provides the following effects: Since the coating film is formed by discharging &1 using a metering pump, there is no problem such as vibration caused by lifting the base drum, and a uniform coating film can be formed.

FIG. 5 is a schematic cross-sectional view showing a so-called overflow type coating device.

A predetermined coating liquid 1 is stored in the coating tank 2, and a tray 6 is provided around the side wall 2d of the coating tank 2. The coating liquid 1 is sent out from the tank 12 by the pump (P) 10, is supplied into the coating tank 2 from the supply lower via the filter (F) 3, and is further coated over the upper edge 2e of the side wall 2j. The water overflows from the circumference of the tank 2, is collected by a tray 6, and is discharged into the tank 12 through a discharge port 8. The cylindrical conductive substrate 4 is immersed in the coating liquid 1, and then the conductive substrate (hereinafter also referred to as a substrate drum) 4 is pulled up at a predetermined speed by the transfer means 35 and subjected to dip coating. . During this dip coating, the coating liquid 1 continues to overflow over the upper edge 2e of the side wall 2d as described above, so that the level of the coating liquid level is kept constant.

According to this example, in addition to achieving the above-mentioned effects (a) to (d), the height of the coating liquid level is kept constant, so that dry matter is generated on the inner circumferential surface of the side wall of the coating tank. Therefore, foreign matter defects caused by this can be prevented.

FIG. 6(a) is a schematic partial cross-sectional view showing still another coating device, and FIG. 6(b) is a cross-sectional view taken along the line 2b-vib in FIG. 6(a).

In this example, an outer wall 15 is provided concentrically at a constant interval around the outer periphery of the coating tank side wall 2d.
A notable feature is that a coating liquid receiver portion 11 is provided in an area sandwiched between the outer wall 15 and the outer wall 15 .

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

The coating liquid receiver part 11 is a coating liquid storage part that stores the coating liquid, that is, it also functions as a kind of coating liquid reservoir, and the coating liquid 1 flowing down along the outer periphery of the side wall 2a is transferred to the coating liquid receiver as shown in the figure. is accommodated in the lower part of section 11. Application liquid receiver is part 1
A discharge port 17 is provided at the lowest end of the coating liquid receiver, and the coating liquid 1 that has been temporarily stored in the portion 11 is discharged from the discharge port 17, and is applied from the supply lower via the pump 10 and the filter 3. It is supplied into tank 2.

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

(g) Since the coating liquid flows down along the outer periphery of the side wall of the coating tank, the flowing area is very large, and the coating liquid flows down while wetting the outer periphery of the side wall of the coating tank. Therefore, as a result, the falling speed of the coating liquid is very low, and the flowing down is carried out quietly, and there is no risk of entraining air bubbles.

What is particularly noteworthy is that even when the base drum is immersed, the flow rate can be lowered due to the size of the flow area, and the coating liquid can flow down quietly.

Therefore, concave coating defects due to air bubbles do not occur, and a uniform coating film can be formed with high productivity. Of course, all the advantages of the conventional overflow type coating device, such as prevention of foreign matter defects, can be fully enjoyed.

(h) Since the coating liquid discharged from the discharge port is supplied into the coating tank from the supply port without passing through a coating liquid storage tank such as a tank, there is no need to provide a separate tank. There is no need to take up extra space, and it is possible to downsize the device and reduce costs.

(i) Since the coating liquid receiver is provided concentrically on the outer periphery of the side wall of the '4 cloth tank and both are integral, it is advantageous that both can be controlled as one when performing temperature control, etc.

FIGS. 7 to 9 each show an example of an electrophotographic photoreceptor supported by the support structure of the present invention and processed by a processing device.

In the photoreceptor shown in FIG.
A carrier generation layer 51 is provided as a layer, and a carrier transport layer 52 is provided as a second layer on the carrier generation layer 51. 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 stacked in this order when viewed from the conductive substrate 50 side. The photoreceptor shown in FIG. 9 has a single-layer structure photosensitive layer 5 containing both a carrier-generating substance and a carrier-transporting substance as a first layer.
3.

Of course, the number and types of coating layers coated and formed by the coating apparatus of the present invention are not limited to the examples shown in FIGS. 7 to 9, nor are their compositions, functions, etc. 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 an undercoat layer and a photosensitive layer with a single layer structure, the photosensitive layer with a single layer structure, and a protective layer. The second layer and the third layer are a subbing layer, a carrier transport layer, and a carrier generation layer, respectively, the carrier generation layer, the carrier transport layer, and the retention layer are the first layer, the second layer, the third layer, Examples include those in which the fourth layer is an undercoat layer, a carrier generation layer, a carrier transport layer, and a protective layer, or those in which the fourth layer is an undercoat layer, a carrier transport layer, a carrier generation layer, and a protective layer.

The undercoat layer is acrylic, methacrylic, vinyl chloride,
Vinyl acetate, epoxy, polyurethane, phenol, polyester, alkyd, polycarbonate, silicone, melamine, vinyl chloride/vinyl acetate copolymer, vinyl chloride/vinyl acetate/maleic anhydride copolymer, etc. It can be formed from various resins.

The carrier generation layer is made of, for example, a monoazo dye, a disazo dye,
Azo dyes such as trisazo dyes, perylenic anhydride,
Perylene dyes such as perylenic acid imide, indigo dyes such as indigo and thioindigo, anthraquinone,
Polycyclic quinones such as pyrenequinone and furapanthrones, quinacridone pigments, bisbenzimidazole pigments, indathrone pigments, squarelylium pigments, phthalocyanine pigments such as metal phthalocyanines and metal-free phthalocyanines, pyrylium salt pigments, thiapyrylium salt pigments Various known carrier-generating substances, such as eutectic complexes formed from polycarbonate and polycarbonate, are mixed with a suitable binder resin and, if necessary, carrier transport'l! It can be formed by dissolving or dispersing it together with quality A in a solvent and applying it.

The carrier transport layer can be made of electron-accepting substances that easily transport electrons, such as trinitrofluorenone or tetranitrofluorenone, as well as polymers with side chains of heterocyclic compounds such as poly-N-vinylcarbazole, and triazoles. Various known holes such as derivatives, oxadiazole derivatives, imidazole derivatives, pyrazoline derivatives, polyarylalkane derivatives, phenylenediamine m1 derivatives, hydrazone derivatives, amino-substituted chalcone derivatives, triarylamine derivatives, carbazole derivatives, stilbene derivatives, phenothiazine derivatives, etc. It can be formed by dissolving a carrier transport material that easily transports in a solvent together with a suitable binder resin, applying the solution, and drying it.

Further, a photosensitive layer having a single layer structure can be formed by dissolving or dispersing the carrier generating substance as described above in a solvent together with a suitable carrier transporting substance and a binder resin, and coating the solution.

Examples of the binder resin include polycarbonate, polyester, methacrylic resin, acrylic resin, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyvinyl acetate, and styrene copolymer resins (e.g., styrene-butadiene copolymer, styrene-methyl methacrylate). copolymer), acrylonitrile copolymer resin (e.g. vinylidene chloride-acrylonitrile copolymer, etc.),
Vinyl chloride-vinyl acetate copolymer, vinyl chloride-hinyl acetate-maleic anhydride copolymer, silicone resin, silicone-alkyd resin, phenol resin (e.g. phenol-formaldehyde resin, m-cresol-formaldehyde resin, etc.), styrene-alkyd resin, poly
Film-forming polymers such as N-vinylcarbazole, polyvinyl butyral, and polyvinyl formal are preferred.

The protective layer contains polyurethane, polyethylene, polypropylene, etc. as the carrier transporting substance and binder resin.
Acrylic resin, methacrylic resin, vinyl chloride resin, vinyl acetate resin, epoxy resin, phenol resin, polyester resin, polycarbonate resin, silicone resin, melamine resin, etc., and copolymers containing two or more repeating units of these resins. It can be formed from resin or the like.

Solvents used in coating and forming the carrier transport layer, carrier generation layer, etc. include acetone, methyl ethyl ketone, cyclohexanone, benzene, toluene, xylene, chloroform, dichloromethane, 1,2-dichloroethane, 1,1,2-trichloroethane. , 1, 1, 2.2
-tetrachloroethane, 1,1.2-1-dichloropropane, 11.2.2-tetrachloropropane, 1,2.
3-trichloropropane, 1,1.2-)dichlorobutane, 1.2.3.4-tetrachlorobutane, tetrahydrofuran, monochlorobenzene, dichlorobenzene, dioxane, methanol, ethanol, isopropanol,
Ethyl acetate, butyl acetate, dimethyl sulfoxide, methylcellosolve acetate, n-butylamine, diethylamine, ethylenediamine, inpropaturamine,
Triethanolamine, triethylenediamine, N.

Examples include N-dimethylformamide.

Further, as a solvent for dissolving the carrier transport substance and the binder resin to form a coating liquid, a solvent is selected that can uniformly dissolve these materials, and a solvent with a boiling point (b p) of 80% is selected.
C. to 150.degree. C. is preferable, and 90.degree. C. to 120.degree. C. is more preferable. If the boiling point is less than 80° C., drying is too fast, resulting in dew condensation, which tends to cause brushing, and drying is too fast, making it impossible to level, making it difficult to obtain a smooth photosensitive layer. Furthermore, if the temperature exceeds 150°C, dripping and uneven coating are likely to occur.

Specifically, dichloromethane, 1,2-dichloroethane (bp = 83.5°C), 1,1.2-)dichloroethane (bp = 113.5°C), 1,4-dioxane (b
p = 101.3°C), benzene (b I) = 80
．． 1t) toluene (b p =110.6°C), o,
Examples include m,p-xylene (bp=138 to 144°C), tetrahydrofuran, dioxane, and monochlorobenzene.

Further, even if the boiling point of a solvent is not in the range of 80°C to 150°C, the boiling point can be adjusted by mixing a high boiling point solvent and a low boiling point solvent.

Further, as a solvent for forming a carrier generation layer and a photosensitive layer having a single layer structure, it is necessary to dissolve the binder resin and the carrier transport substance contained if necessary, and to transfer the carrier generation substance to a particle size of preferably 2 μm or less, more preferably 1 μm or less. A material that can be dispersed in the form of fine particles and supply a stable dispersion, and that does not unduly dissolve or swell the lower carrier transport layer, subbing layer, etc., if present, is selected.

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 used in the carrier generation layer. , is a preferred solvent for both carrier transport layers.

The coating liquid used in the present invention may contain other substances in addition to those mentioned above. For example, the inclusion of a siloxane compound has the effect of smoothing the coating surface. Examples of siloxane compounds include dimethylpolysiloxane and methylphenylpolysiloxane. The amount added is 1 to 110,000 pp to the total amount of coating liquid.
is preferable, and more preferably 1O-1000pp+m.

Further, in the photosensitive layer, for the purpose of reducing residual potential and memory, an electron-accepting substance such as succinic anhydride, maleic anhydride, or phthalic anhydride is preferably added to the carrier-generating substance 1.
It can be added at a ratio of 0.1 to 100 parts by weight per 00 parts by weight. Furthermore, the photosensitive layer may contain an organic amine such as butylamine or diisobutylamine in a mole number equal to or less than that of the carrier-generating substance, if necessary, for the purpose of improving sensitivity and reducing memory.

In addition, it is also possible to form a photoreceptor using the same binder resin and the same solvent, especially in the coating liquid for the carrier transport layer and the coating liquid for the carrier generation layer. In that case, the productivity and performance of the photoreceptor may be improved. This has the advantage of further improving the performance. That is, if the same binder resin can be used, the barrier between the carrier generation layer and the carrier transport layer will be reduced, and the carriers generated during light irradiation will be smoothly injected and transported to the carrier transport layer.
The sensitivity characteristics, residual potential, memory characteristics, etc. of the photoreceptor are improved accordingly.

Furthermore, if the same binder resin, solvent, etc. can be used in common, there is an advantage that the coating process becomes easier, more accurate, and faster.

Although the shape, material, etc. of the conductive substrate are not particularly limited, a cylindrical shape is preferably used. Also,
The material is a metal plate such as an aluminum alloy, a metal drum, or a conductive thin layer made of a conductive compound such as a conductive polymer such as indium oxide or a metal such as aluminum, palladium, or gold by means such as coating, vapor deposition, or lamination. , paper, plastic film, or other substrates are used.

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

(a) A method of applying a solution in which a carrier-generating substance is dissolved in a suitable solvent, or a solution in which a binder is added and mixed and dissolved.

(b) A method in which a carrier-generating substance is made into fine particles in a dispersion medium using a ball mill, a homomixer, etc., and a binder is added as necessary to mix and disperse the obtained dispersion, and the resulting dispersion is applied.

Dispersing the particles under the action of ultrasound in these methods allows for homogeneous dispersion.

The coating liquid for forming photoreceptor constituent layers such as the photosensitive layer, undercoat layer, and protective layer preferably contains clay in a range of 5 to 500 cp (centiboise), more preferably in a range of 10 to 300 cp. If the viscosity is smaller than the above range, the coating film tends to sag (the film tends to be thicker at the bottom of the drum than at the top, and if it is larger than the above range, the viscosity of the coating liquid in the coating tank will become uneven). It tends to cause unevenness in the coating film thickness.

In addition, when forming the photoconductor constituent layers, blade coating,
Coating methods such as spray coating and spiral coating may also be used in combination.

The present invention has been exemplified above, but the embodiments of the present invention are described in B above.
The present invention is not limited to the following, and various modifications are possible.

For example, the structure, shape, dimensions, etc. of the transfer tool and hand can be changed in various ways, and as the driving means, in addition to air pressure, a motor or the like can be used. The shape of the grip on the lid can also be changed.
In this case, the shape of the hand etc. can also be changed accordingly.

The shape, dimensions, etc. of the support protrusion and the support portion can be changed in various ways.
Further, the shape of the support surface is not limited to a flat surface, but may also be a curved surface, a serrated surface, a wavy surface, or the like. In addition to the method of supporting the base drum inside the hollow part, in addition to the method of placing the lid on the support surface as described above, the diameter of the support part is made larger than the above-mentioned method, and the diameter of the support part is made equal to or larger than the diameter of the base hollow part. It is also possible to fit the hollow part of the base into this support part and support it by the frictional force between the two parts.Furthermore, manual or automatic chuck means and gripping means are provided on the support protrusion and the support part side, and the support After inserting the protrusion and the support portion into the hollow portion of the base drum, the chuck means and the gripping means may be operated to support the base drum.

The present invention can be applied to various support structures for cylindrical objects to be coated and processing devices thereof.

Effects of the Invention According to the supporting structure for a cylindrical object to be coated according to the present invention, since the cylindrical object to be coated is supported at a predetermined position on the wall surface of the internal space of the cylindrical object, Even if the dimensions of the coated body change, the cylindrical coated body can be held at a position at a constant distance from the predetermined position.

Therefore, there is no need to reset the gripping position, the operation is easy, and processing can be performed continuously, improving productivity and reducing costs.

Further, since the support means is extended 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 less likely to be released.

According to the processing apparatus for a cylindrical object according to the present invention, the cylindrical object to be coated is transferred from a coating section to a processing section, and in the processing section, a predetermined area on the wall surface of an internal space of the cylindrical object is transferred. Since the cylindrical object to be coated is supported at the specified position, when the cylindrical object to be coated is supported by the support means, even if the dimensions of the cylindrical object to be coated change, the distance from the predetermined position is constant. The cylindrical body to be coated may be transferred to the desired position.Therefore, the above effects can be achieved.

In addition, since the cylindrical object to be coated is supported by a support means inserted into the internal space of the cylindrical object while being subjected to a predetermined treatment, the cylindrical object to be coated can be supported more reliably during processing. Support is difficult to remove.

Further, a supporting means is inserted into the inner space of the cylindrical object coated with the coating solution, and a predetermined treatment is performed while supporting the cylindrical object at a predetermined position on the wall surface of the inner space by the supporting means. This prevents the coating liquid from adhering to the surface during processing, thereby preventing stains.

[Brief explanation of the drawing]

1 to 9 show examples, and FIG. 1 (
a) is a schematic partial cross-sectional view showing a state in which the base drum coated with the coating liquid is supported by a supporting tool; FIG. The figure is a schematic partial cross-sectional view showing a state in which an uncoated base drum is supported. Figures 3, 4, and 5 are schematic partial cross-sectional views showing the coating device, respectively. Figure 6 (a) is the other one. FIG. 7(b) is a schematic partial sectional view showing the coating device of FIG. It is a partial sectional view showing an example. FIG. 10 is a sectional view showing a conventional support structure. In addition, in the symbols shown in the drawings, ■・----- Coating liquid 4 --- One base drum 4 b -------- One base drum hollow opening 4 c
------One base drum hollow part 4d---Base drum hollow part inner circumferential surface 4f---One base drum lower end surface 5---------Lid 5a---Gripping Parts 35--1--Transfer tool 35a--Hand 40--Support stand 4t--1--Support protrusion 42-- -----------Supporting portion 42a ---------One supporting surface.

Claims (1)

[Claims] 1. Supporting a cylindrical object to be coated, which includes a cylindrical object to be coated having an internal space, and a support means inserted into the inner space and supporting the cylindrical object at a predetermined position on a wall surface of the inner space. structure. 2. An application unit that applies a coating liquid to a cylindrical object having an internal space; a supporting means is inserted into the internal space, and the supporting means allows the cylindrical object to be coated at a predetermined position on the wall surface of the internal space; a processing section that performs a predetermined treatment on the cylindrical object while supporting the cylindrical object; and a transfer means that transports the cylindrical object from at least the application section to the processing section. Processing equipment.