JP4830618B2 - Coating device, painting method - Google Patents

Description

The present invention is a coating apparatus for forming a coating film on the cylinder outer peripheral surface about the painting how.

  In general, as a method for forming a coating film on the outer surface of a cylindrical body, a dip coating method in which the cylindrical body is lowered and immersed in a dipping tank in which a coating solution is stored, and a vertical coating method are known.

  However, although the dip coating method has the advantage that the operation is simple, in order to uniformly coat the coating surface, the liquid level at the top of the dip tank is kept smooth and the flow of the coating liquid inside the dip tank is reduced. In order to stabilize, it is necessary to dip the cylinder slowly. Therefore, it takes time to immerse, and in order to prevent the coating liquid from being applied to the inside of the cylindrical body other than the surface to be coated, a mechanism for keeping the inside of the cylindrical body airtight is necessary. Even if a mechanism for keeping the inside of the cylinder airtight is provided, it is inevitable that the coating liquid adheres to a part of the inside of the cylinder, and a process for removing the attached coating liquid is required, and further, the entire cylinder body is immersed. In order to do so, a large amount of coating solution was required.

  On the other hand, in the vertical coating method, a ring-shaped coating liquid container that holds an elastic packing for preventing leakage of a ring-shaped liquid having an opening is provided, a cylindrical body is inserted into the opening of the elastic packing, and the cylindrical body is ringed. This is a method of applying to the outer peripheral surface of the cylindrical body by moving it relatively upward with respect to the liquid coating solution container, and the productivity can be improved because the dipping process can be omitted compared to the dip coating method. Since the coating liquid does not adhere to the inner surface of the cylindrical body, no coating liquid removing step is required. Further, the coating liquid per cylindrical body can be applied in a small amount, and the cylindrical body is opened to the ring-shaped coating liquid solution. There is an advantage that continuous application to be continuously inserted into the film is possible.

  As the above-described vertical coating method, for example, in Patent Document 1, a bottom wall having an elastic body packing in which a circular hole is formed in the center and the inner diameter of the circular hole can be expanded, and a cylindrical body can penetrate vertically. Using a coating vessel having a cylindrical through-hole and a top wall having a coating container opening / closing lid for closing the cylindrical body through-hole, and a bottom wall and a top wall that are liquid-tightly connected, a coating solution in the coating container is used. There has been proposed a coating apparatus that sequentially applies a coating solution to the outer circumferential surface of a immersed cylinder.

  Further, in Patent Document 2, both ends of the cylindrical base are supported by upper and lower base supports, one of which is provided with openings at the upper and lower portions, and a seal member for preventing liquid leakage is provided at the lower opening. Relatively move the coating basket and the cylindrical base so that the coating liquid stays in the coating tank even when the coating tank is in the standby state before coating, and the coating stored in the coating basket There has been proposed a coating apparatus that sequentially applies a coating liquid to the outer peripheral surface of a cylindrical body immersed in the liquid.

Japanese Patent Laid-Open No. 11-188296 JP 2004-279918 A

  In the coating apparatus and the coating apparatus disclosed in Patent Documents 1 and 2 above, an elastic packing or seal member for preventing leakage of the coating liquid or coating liquid is provided at the bottom of the coating container or the lower part of the coating basket. It has been.

  However, neither the elastic packing nor the seal member can completely prevent liquid leakage from the bottom of the coating container or the lower part of the coating basket, and the leaked coating liquid (or coating liquid) is applied (coating). ) There is a risk that the coating film on the outer peripheral surface of the cylindrical substrate becomes non-uniform due to adhesion to the outer periphery of the cylindrical substrate.

  Further, when the elastic packing or the sealing member comes into contact with the outer periphery of the coated (coated) cylindrical substrate, the coating film may be damaged and a coating film defect may be caused.

  Furthermore, when applying multiple coatings (coating) continuously. There is a possibility that the coating liquid (coating liquid) adhering to the thickness direction of the elastic body packing or the sealing member is solidified or fixed, and the coating film on the outer peripheral surface of the coated (coated) substrate becomes non-uniform. For this reason, it is necessary to clean the elastic packing or the sealing member for every fixed number of coating (coating), and the work may be complicated.

  In addition, the gas-liquid interface of the coating liquid (coating liquid) in the coating container or coating basket is based on the coating amount (coating amount) on the cylindrical substrate and the coating liquid (coating liquid in the coating container or coating basket ( The upper limit fluctuates greatly depending on the supply amount of the coating liquid). As a result, the coating liquid (coating liquid) is dried, and the dry coating film generated in the coating container or coating basket is peeled off. As a result of applying the liquid (coating liquid) to the cylindrical substrate at the same time, there is a risk of causing coating film defects on the cylindrical substrate.

The present invention has been made in view of the above problems, the coating apparatus for forming a coating film on the cylindrical body outer peripheral surface can be produced a uniform coating film with high productivity, to provide a coating how.

Coating apparatus, coating how the present invention has the following features.
(1) A coating liquid holder having an upper opening and a lower opening is provided, a cylindrical body is passed through the upper opening and the lower opening, and the cylindrical body is vertically above the coating liquid holder. In the coating apparatus that applies the coating liquid to the outer peripheral surface of the cylindrical body by relatively moving in the direction, the coating liquid holder includes a coating liquid channel for supplying the coating liquid, and a coating liquid connected to the coating liquid channel The coating liquid discharge slit includes an inner surface of the coating liquid holder and an outer peripheral surface of the cylindrical body when the cylindrical body passes through the upper opening and the lower opening. And a supply means for supplying the coating liquid to the outer peripheral surface of the cylindrical body, which is filled with the coating liquid between the cylindrical openings and located below the lower opening .

(2) When the cylindrical body is passed through the upper opening and the lower opening, the coating liquid is filled between the inner surface of the coating liquid holder and the outer peripheral surface of the cylindrical body, and the coating is performed. The coating apparatus according to (1), wherein the coating liquid overflows from an upper end portion of the liquid holder .

(3) The application liquid holder or a part of the upper application liquid holder which is one of the constituent members of the application liquid holder has a mechanism capable of moving in the horizontal direction, and the upper application liquid holder An inclined surface is formed on the inner side surface of the cover, and the portion having the inclined surface has a guiding shape when the cylindrical body is inserted into the upper opening and the lower opening of the coating liquid holder, and the guiding shape is The lower end portion of the cylindrical body is formed so that the distance from the outer peripheral surface of the cylindrical body to be penetrated increases from above the nozzle or the slit when the cylindrical body passes through the opening from above the opening. Is the coating apparatus according to (1), wherein the coating liquid holder or the upper coating liquid holding section moves in the horizontal direction to perform alignment by contacting the leading surface .

(4) A magnet is attached to at least the lower end portion of the outer peripheral surface of the cylindrical body holder that holds the cylindrical body penetrating from the upper opening so that one pole faces in the center direction of the cylindrical body, and the coating liquid The cylindrical body wall is mounted in the substantially entire circumference near the upper opening of the holder or in the substantially entire circumference near the upper opening of the upper coating liquid holder that is one of the components of the coating liquid holder. It is a coating device as described in said (3) with which the magnet is arrange | positioned and embedded in the direction in which reaction force acts with respect to the made magnet .

(5) having a coating liquid holder having an upper opening and a lower opening, having a coating liquid flow path for supplying a coating liquid, and a coating liquid slit connected to the coating liquid flow path; A coating method for applying a coating liquid to the outer peripheral surface of the cylindrical body by causing a cylindrical body to pass through the upper opening and the lower opening and moving the cylindrical body in a vertical upward direction relative to the coating liquid holder. When the cylindrical body is passed through the upper opening and the lower opening, the coating liquid is filled between the inner surface of the coating liquid holder and the outer peripheral surface of the cylindrical body through the coating liquid slit. And it is an application | coating method apply | coated, supplying a coating liquid continuously or intermittently to the said cylindrical body outer peripheral surface located below the lower opening part of the said coating liquid holder .

(6) When the cylindrical body is passed through the upper opening and the lower opening, the coating liquid is filled between the inner surface of the coating liquid holder and the outer peripheral surface of the cylindrical body, and the coating is performed. The coating method according to (5) above, wherein the coating liquid overflows from the upper end of the liquid holder .

(7) The coating liquid holder or a part of the upper coating liquid holder that is one of the constituent members of the coating liquid holder has a mechanism that can move in the horizontal direction, and the upper coating liquid holder An inclined surface is formed on the inner side surface of the cover, and the portion having the inclined surface has a guiding shape when the cylindrical body is inserted into the upper opening and the lower opening of the coating liquid holder, and the guiding shape is The lower end portion of the cylindrical body is formed so that the distance from the outer peripheral surface of the cylindrical body to be penetrated increases from above the nozzle or the slit when the cylindrical body passes through the opening from above the opening. Is the coating method according to the above (5), wherein the coating liquid holder or the upper coating liquid holding part moves in the horizontal direction to perform alignment by contacting the leading surface .

Coating apparatus of the present invention, according to the coating how, a uniform coating film on the outer peripheral surface of the cylindrical substrate can be produced with high productivity and to obtain a high uniformity electrophotographic photoreceptor on the outer peripheral surface it can.

Coating apparatus of the present invention, an example of the application how below.

  Hereinafter, the “coating apparatus” is used to include an electrophotographic photoreceptor manufacturing apparatus and an endless belt manufacturing apparatus. Further, hereinafter, the “coating method” is used in the meaning including a method for producing an electrophotographic photosensitive member and a method for producing an endless belt. In the electrophotographic photosensitive member manufacturing apparatus and manufacturing method, “cylindrical body” described below is read as “electrophotographic photosensitive member substrate”, and in the endless belt manufacturing method and manufacturing method, the “cylindrical body” described below is used. “Body” is read as “cylindrical mold”, and “coating solution” described below is read as “belt forming solution”.

[Embodiment 1]
The first embodiment of the present invention will be described below with reference to FIGS. 1 to 3 by taking a coating apparatus as an example.

  As shown in FIG. 2, the coating apparatus 100 according to the present embodiment includes a coating liquid holder 10 having an upper opening 17a and a lower opening 17b, a cylindrical body that supports the coating liquid holder 10 so as to be horizontally movable. A cylindrical body container 30, and the cylindrical body is passed through the upper opening 17 a and the lower opening 17 b of the coating liquid holder 10, and the cylindrical body is vertically upward with respect to the coating liquid holder 10. Is a coating apparatus that applies the coating liquid to the outer peripheral surface of the cylindrical body by relative movement. The coating liquid holder 10 has supply means for supplying the coating liquid to the outer peripheral surface of the cylindrical body located below the lower opening 17b.

  The coating liquid holder 10 includes an upper coating liquid holder 12 and a lower coating liquid holder 14. By connecting the upper coating liquid holder 12 and the lower coating liquid holder 14, the coating liquid flow path 20. And a coating liquid discharge slit 18 are formed. Here, as will be described later, the coating liquid discharge slit 18 discharges the coating liquid perpendicularly to the outer peripheral surface of the cylindrical body penetrating the upper opening 17a and the lower opening 17b of the coating liquid holder 10. In addition, as shown in FIG. 2, the coating liquid flow path 20 causes a slight pressure loss by bending the flow path diameter and the flow path, thereby making the discharge amount from the coating liquid discharge slit 18 constant. keep.

  More specifically, the lower coating liquid holder 14 is provided with at least one coating liquid supply port 16 for supplying a coating liquid for coating the outer peripheral surface of the cylindrical body. Is formed with one groove that constitutes a coating liquid flow path 20 through which the coating liquid supplied from the coating liquid supply port 16 circulates. Further, a hole 24 is provided in the lower surface of the lower coating liquid holder 14. ing.

  Further, the other groove constituting the coating liquid flow path 20 is formed on the lower surface of the upper coating liquid holder 12, and further, an inclined surface 13 is formed on the inner side surface of the upper coating liquid holder 12. The portion having the inclined surface 13 has a guiding shape when the cylindrical body is inserted into the upper opening 17a and the lower opening 17b of the coating liquid holder 10.

  The coating liquid holder 10 may be formed as an integral type.

  On the other hand, the cylindrical body container 30 is provided with a pedestal 40 for mounting the coating solution holder 10 on the opening of the cylindrical container 35 so as to be horizontally movable. The pedestal 40 has a ball 34 and a ball 34. As shown in FIG. 1, for example, three ball bearings including a support 32 that rotatably supports the ball bearings are provided, and the ball bearings are provided at an angle of 60 ° with respect to the center of the cross section. Note that the number of ball bearings is not limited to three, and it is desirable to select the number as appropriate according to need. The opening of the cylindrical container 35 is further provided with a projecting body 38 that can be pivotally mounted in the hole 24 of the lower coating solution holder 14 and a support base 36 that supports the projecting body 38. It has been. As shown in FIG. 1, for example, three sets of the air holes 24, the protrusions 38, and the support bases 36 are provided, and these are provided at an angle of 60 ° from the center of the cross section.

  Further, as shown in FIG. 3, the upper coating solution holder 12 and the lower coating solution holder 14 are connected by a bolt 15. For example, as shown in FIG. 1, the upper coating solution holder 12 and the lower coating solution holder 14 are connected and fixed at three locations by bolts 15, and the bolts 15 are provided at an angle of 60 ° from the center of the cross section. It has been. Further, as shown in FIG. 3, the base 40 and the cylindrical container 35 are also connected by a bolt 33.

  In addition, the above-described “guiding shape” is the center of the cylindrical body when the central axis of the cylindrical body is shifted from the central axis of the cylindrical body container 30 when the cylindrical body is lowered while holding only the upper part of the cylindrical body. The coating liquid holder 10 is provided in the coating liquid holder 10 in order to smoothly penetrate the coating liquid holder 10 and store it in the cylindrical container 30 while correcting the axis. More specifically, when the cylindrical body is lowered, the lower end of the cylindrical body abuts on the inclined surface 13 of the guiding shape, so that the above-mentioned protruding body 38 moves in the hole 24 and the ball bearing also cooperates. The coating liquid holder 10 moves slightly on the base 40 in the horizontal direction. When the cylindrical body is further lowered and the lower end of the cylindrical body comes into contact with the inclined surface 13 of the coating liquid holder 10, the coating liquid holder 10 is finely moved in the horizontal direction on the pedestal 40 as described above, and the above-described operation is performed. By repeating the above, it is possible to smoothly guide to the cylindrical container 30 while correcting the central axis of the cylindrical body.

  As shown in FIG. 5, the inclination angle θ of the guiding-shaped inclined surface is in the range of 30 ° to 70 °, and preferably in the range of 45 ° to 60 °.

  Further, the formation of the upper coating liquid holder 12 is not limited to the shape shown in FIG. 2, but has a notch portion on the inclined surface 13 as in the upper coating liquid holder 19 shown in FIG. May be. As will be described later, when the cylindrical body penetrates into the coating liquid holder 10 and the coating operation is performed, the coating liquid is filled between the inner surface of the coating liquid holder 10 and the outer peripheral surface of the cylindrical body. It is in the state. Therefore, by forming the upper coating liquid holder 19, more coating liquid exists between the outer peripheral surface of the cylindrical body and the coating liquid holder 10, and therefore adheres to the outer peripheral surface of the cylindrical body. The drying preventing effect of the applied coating solution is further improved.

  The upper opening 17a and the lower opening 17b are preferably made of a resin material or covered with a resin material. Thereby, the contact damage of a cylindrical body outer peripheral surface and an opening part can be prevented.

  Next, operation | movement of the coating device of this Embodiment and the coating method of this Embodiment are demonstrated below using FIG. 2 and FIG.

  First, the cylindrical body 500 whose upper part is held is lowered by a cylindrical body elevator (not shown). On the other hand, the coating liquid flow path 20 of the coating liquid holder 10 is supplied with the coating liquid 60 continuously or intermittently, so that the opening of the coating liquid ejection slit 18 does not dry out from the opening of the coating liquid ejection slit 18. The coating solution is discharged continuously or intermittently, and the coating solution flows out from the lower opening 17b of the coating solution holder 10 (S100).

  Due to the guiding shape of the coating liquid holder 10, the cylindrical body 500 is lowered and penetrated through the upper opening 17 a and the lower opening 17 b of the coating liquid holder 10, and the cylindrical body container 30 (not shown in FIG. 4). It will be housed inside. Even during the lowering and storing operation of the cylindrical body, the coating liquid 60 is continuously or intermittently supplied to the coating liquid flow path 20 of the coating liquid holder 10, and the coating liquid is continuously or intermittently supplied from the coating liquid discharge slit 18. Is discharged. As a result, the coating liquid is filled between the inner surface of the coating liquid holder 10 and the outer peripheral surface of the cylindrical body 500, and the coating liquid flows out from the lower opening 17 b of the coating liquid holder 10. When the cylindrical body 500 reaches the lowermost end, the coating liquid flows out downward from the upper opening 17a, so that the coating liquid continues to the outer peripheral surface of the cylindrical body 500 positioned below the lower opening 17b. Or it supplies intermittently and the outer peripheral surface of the cylindrical body 500 will be in the state wet with the coating liquid (S102). Further, by filling the coating liquid between the inner surface of the coating liquid holder 10 and the outer peripheral surface of the cylindrical body 500, it is possible to prevent drying of the coating liquid attached to the outer peripheral surface of the cylindrical body 500, Generation | occurrence | production of a coating-film defect can be suppressed.

  Next, after the cylindrical body 500 reaches the lowermost end, the cylindrical body 500 is pulled up at a speed set upward. Even during this lifting operation, the coating liquid 60 is continuously or intermittently supplied to the coating liquid flow path 20 of the coating liquid holder 10, and the coating liquid is discharged from the coating liquid discharge slit 18 continuously or intermittently. . At this time, the application liquid supply amount is controlled in consideration of the application amount on the outer peripheral surface of the cylindrical body 500 based on the formula described later, and the coating is applied between the inner surface of the coating liquid holder 10 and the outer peripheral surface of the cylindrical body 500. The coating liquid is supplied so that the coating liquid stays in a state where the liquid is full or more, preferably more than the space volume between the inner surface of the coating liquid holder 10 and the outer peripheral surface of the cylindrical body 500, and the coating liquid holder 10 The coating liquid is allowed to flow downward from the lower opening 17b of the coating liquid holder 10 while overflowing from the upper end of the coating liquid (S104). In addition, by overflowing a coating liquid, while being able to stabilize the liquid level height of the coating liquid of the coating liquid holder 10, a bubble and a foreign material can be prevented from staying and a coating-film defect can be suppressed.

(Equation 1)
Wet film thickness (h)
≒ (μU / ρg) ^1/2 (0.94581 (Ca) ^1/6 -0.100685 (Ca) ^1/2 )
(However, Ca≡μU / γ
μ: Liquid viscosity [Nsec / m ² ]
U: Lifting (coating) speed [m / sec]
ρ: Liquid density [kg / m ³ ]
g: Gravity acceleration [m / sec ² ]
γ: surface tension [N / m])

In addition, the liquid supply condition to the coating liquid holder when applying the cylindrical body with the outer diameter d and the length L is as follows:
(Equation 2)
Q [m ³ / sec]> hπdL ² / U + (liquid supply flow rate downward from the opening)
(However, U: Lifting (coating) speed [m / sec]
h: wet film thickness [m])

  All of the above sources are described in J. Engg. Math. 16, 209-221 (1982), S.A. D. R. WILSON.

  As a result, a uniform coating 62 is formed on the outer peripheral surface of the cylindrical body 500 positioned above the upper opening 17a of the coating liquid holder 10.

[Embodiment 2]
The second embodiment of the present invention will be described below with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same structure as the said Embodiment 1, and the description is abbreviate | omitted.

  As shown in FIG. 8, the coating apparatus according to the present embodiment includes a coating liquid holder 50 having an upper opening 57a and a lower opening 57b, and supports the coating liquid holder 50 so as to be horizontally movable and a cylindrical body. And a cylindrical body container 30 that can be stored. The cylindrical body is passed through the upper opening 57 a and the lower opening 57 b of the coating liquid holder 50, and the cylindrical body is vertically upward with respect to the coating liquid holder 50. This is a coating apparatus that applies a coating solution to the outer peripheral surface of a cylindrical body by relative movement. The coating liquid holder 50 has supply means for supplying the coating liquid to the outer peripheral surface of the cylindrical body located below the lower opening 57b.

  The coating liquid holder 50 includes an upper outer coating liquid holder 52, an upper inner coating liquid holder 55, and a lower coating liquid holder 54. The upper outer coating liquid holder 52, the upper inner coating liquid holder 55, and the like. By connecting the lower coating solution holder 54, the coating solution flow path 20 and the coating solution upper discharge slit 58 are formed. As shown in FIG. 8, the coating liquid flow path 20 causes a slight pressure loss by bending the flow path diameter and the flow path, so that the discharge amount from the coating liquid upper discharge slit 58 is constant. Keep on.

  More specifically, the lower coating solution holder 54 is provided with at least one coating solution supply port 56 for supplying a coating solution for coating the outer peripheral surface of the cylindrical body. Is formed with one groove constituting the coating liquid flow path 20 through which the coating liquid supplied from the coating liquid supply port 56 circulates, and further, a hole 24 is provided on the lower surface of the lower coating liquid holder 54. ing.

  Further, the other groove constituting the coating liquid channel 20 is formed on the inner surface of the upper outer coating liquid holder 52, and the inclined surface 53 is formed on the inner surface of the upper inner coating liquid holder 55. The portion having the inclined surface 53 has a guiding shape when the cylindrical body is inserted into the upper opening 57a and the lower opening 57b of the coating liquid holder 50.

  The coating liquid holder 50 may be formed as an integral type.

  Further, as shown in FIG. 9, the upper outer coating liquid holder 52 and the lower coating liquid holder 54 are connected by a bolt 42, and the upper inner coating liquid holder 55 and the lower coating liquid holder 54 are bolts. 44. For example, as shown in FIG. 7, the bolts 42 and 44 are connected and fixed at three locations, respectively, and the bolts 42 and 44 are provided at an angle of 60 ° from the center of the cross section.

  Further, the “guiding shape” in the coating liquid holder 50 is the same as in the first embodiment, and the inclination angle θ of the inclined surface of the guiding shape is preferably in the range of 30 ° to 70 °. Is in the range of 45 ° to 60 °.

  The application liquid is supplied to the upper edge of the application liquid holder 50 by providing the application liquid upper discharge slit 58 as in the present embodiment. As a result, the surface of the coating liquid holder 50 can be kept wet all the time, and in the case of a highly volatile coating liquid, solids may adhere to the surface of the coating liquid holder 50 by drying the coating liquid. Can be prevented, and quality can be maintained in continuous coating.

  The upper opening 57a and the lower opening 57b are preferably formed of a resin material or covered with a resin material. Thereby, the contact damage of a cylindrical body outer peripheral surface and an opening part can be prevented.

  The operation of the coating apparatus and the coating method are the same as those described above except that the coating liquid holder 10 and the coating liquid discharge slit 18 (FIG. 4) are changed to the coating liquid holder 50 and the coating liquid upper discharge slit 58. Since it is the same as that of Form 1, the description thereof is omitted.

[Embodiment 3]
The third embodiment of the present invention will be described below with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same structure as the said Embodiment 1 and Embodiment 2, and the description is abbreviate | omitted.

  As shown in FIG. 11, the coating apparatus according to the present embodiment has a coating liquid holder 70 having an upper opening 77a and a lower opening 77b, and supports the coating liquid holder 70 so as to be horizontally movable and a cylindrical body. And a cylindrical body container 30 that can be stored. The cylindrical body is passed through the upper opening 77 a and the lower opening 77 b of the coating liquid holder 70, and the cylindrical body is vertically upward with respect to the coating liquid holder 70. This is a coating apparatus that applies a coating solution to the outer peripheral surface of a cylindrical body by relative movement. The coating liquid holder 70 has supply means for supplying the coating liquid to the outer peripheral surface of the cylindrical body located below the lower opening 77b.

  The coating solution holder 70 includes an upper outer coating solution holder 72, an upper inner coating solution holder 75, and a lower coating solution holder 74. The upper outer coating solution holder 72, the upper inner coating solution holder 75, and the like. By connecting the lower coating solution holder 74, the coating solution channel 20, the coating solution discharge slit 71, and the coating solution upper discharge slit 78 are formed. Here, as will be described later, the coating liquid discharge slit 71 discharges the coating liquid perpendicularly to the outer peripheral surface of the cylindrical body penetrating the upper opening 77a and the lower opening 77b of the coating liquid holder 70.

  More specifically, the lower coating liquid holder 74 is provided with at least one coating liquid supply port 76 for supplying a coating liquid for coating the outer peripheral surface of the cylindrical body. Is formed with one groove forming the coating liquid flow path 20 through which the coating liquid supplied from the coating liquid supply port 76 circulates, and further, a hole 24 is provided on the lower surface of the lower coating liquid holder 74. ing.

  Further, the other groove constituting the coating liquid channel 20 is formed on the inner side surface of the upper outer coating liquid holder 72, and the inclined surface 73 is formed on the inner side surface of the upper inner coating liquid holder 75. The portion having the inclined surface 73 has a guiding shape when the cylindrical body is inserted into the upper opening 77 a and the lower opening 77 b of the coating liquid holder 70.

  The coating liquid holder 70 may be formed as an integral type.

  12, the upper outer coating liquid holder 72 and the lower coating liquid holder 74 are connected by a bolt 42, and the upper inner coating liquid holder 75 and the lower coating liquid holder 74 are bolts. 44. For example, as shown in FIG. 10, the bolts 42 and 44 are connected and fixed at three positions, respectively, and the bolts 42 and 44 are provided at an angle of 60 ° from the center of the cross section.

  Further, the “guiding shape” in the coating liquid holder 70 is the same as that in the first embodiment, and the inclination angle θ of the inclined surface of the guiding shape is preferably in the range of 30 ° to 70 °. Is in the range of 45 ° to 60 °.

  By providing the coating liquid upper discharge slit 78 as in the present embodiment, the coating liquid is supplied to the upper edge of the coating liquid holder 70. As a result, the surface of the coating liquid holder 70 can be kept wet all the time, and in the case of a highly volatile coating liquid, solids may adhere to the surface of the coating liquid holder 70 by drying the coating liquid. Can be prevented, and quality can be maintained in continuous coating.

  The upper opening 77a and the lower opening 77b are preferably made of a resin material or covered with a resin material. Thereby, the contact damage of a cylindrical body outer peripheral surface and an opening part can be prevented.

  Next, operation | movement of the coating device of this Embodiment and the coating method of this Embodiment are demonstrated below using FIG. 10 and FIG.

  First, the cylindrical body 500 whose upper part is held is lowered by a cylindrical body elevator (not shown). On the other hand, the coating liquid 60 is continuously or intermittently supplied to the coating liquid flow path 20 of the coating liquid holder 70, and the opening is not dried from the coating liquid discharge slit 71 and the coating liquid upper discharge slit 78. The coating liquid is discharged continuously or intermittently, and the coating liquid flows out from the lower opening 77b of the coating liquid holder 70 (S200).

  Due to the guiding shape of the coating liquid holder 70, the cylindrical body 500 is lowered and penetrated through the upper opening 77a and the lower opening 77b of the coating liquid holder 70, and the cylindrical body container 30 (not shown in FIG. 13). It will be housed inside. Even during the lowering and storing operation of the cylindrical body, the coating liquid 60 is continuously or intermittently supplied to the coating liquid channel 20 of the coating liquid holder 70, and is applied from the coating liquid discharge slit 71 and the coating liquid upper discharge slit 78. The coating liquid 60 is discharged continuously or intermittently. As a result, the coating liquid is filled between the inner surface of the coating liquid holder 70 and the outer peripheral surface of the cylindrical body 500, and the coating liquid flows out from the lower opening 77 b of the coating liquid holder 70. When the cylindrical body 500 reaches the lowermost end, the coating liquid flows out downward from the lower opening 77b, so that the coating liquid continues to the outer peripheral surface of the cylindrical body 500 positioned below the upper opening 77a. Or it supplies intermittently and the outer peripheral surface of the cylindrical body 500 will be in the state wet with the coating liquid (S202). Further, by filling the coating liquid between the inner surface of the coating liquid holder 70 and the outer peripheral surface of the cylindrical body 500, it is possible to prevent the coating liquid attached to the outer peripheral surface of the cylindrical body 500 from being dried, Generation | occurrence | production of a coating-film defect can be suppressed.

  Next, after the cylindrical body 500 reaches the lowermost end, the cylindrical body 500 is pulled up at a speed set upward. Even during this lifting operation, the coating liquid 60 is continuously or intermittently supplied to the coating liquid flow path 20 of the coating liquid holder 70, and continuously or intermittently from the coating liquid discharge slit 71 and the coating liquid upper discharge slit 78. The coating liquid is discharged. At this time, based on the equation shown in [Equation 1], the application liquid supply amount is controlled in consideration of the application amount on the outer peripheral surface of the cylindrical body 500, and the inner surface of the coating liquid holder 70 and the outer periphery of the cylindrical body 500 are controlled. The coating solution is supplied so that the coating solution stays in a state where the coating solution is filled with the surface or more, preferably over the space volume between the inner surface of the coating solution holder 70 and the outer peripheral surface of the cylindrical body 500. The coating liquid is allowed to flow downward from the lower opening 77b of the coating liquid holder 70 while overflowing from the upper end of the coating liquid holder 70 (S204).

  In addition, by overflowing a coating liquid, while being able to stabilize the liquid level height of the coating liquid of the coating liquid holder 70, a bubble and a foreign material can be prevented from staying and a coating film defect can be suppressed. Further, the coating liquid is supplied to the upper edge of the coating liquid holder 70 by providing the coating liquid upper discharge slit 78. As a result, the surface of the coating liquid holder 70 can be kept wet all the time, and in the case of a highly volatile coating liquid, solids may adhere to the surface of the coating liquid holder 70 by drying the coating liquid. Can be prevented, and quality can be maintained in continuous coating.

  Thereby, a uniform coating film 62 is formed on the outer peripheral surface of the cylindrical body 500 located above the upper opening 77a of the coating liquid holder 70.

[Embodiment 4]
Embodiment 4 in the present invention will be described below with reference to FIGS. 14 and 15 by taking an example of a coating apparatus. In addition, the same code | symbol is attached | subjected to the same structure as the said Embodiment 1 to Embodiment 3, and the description is abbreviate | omitted.

  As shown in FIG. 14, the coating apparatus according to the present embodiment has a coating liquid holder 80 having an upper opening 87a and a lower opening 87b, and supports the coating liquid holder 80 so as to be horizontally movable and a cylindrical body. And a cylindrical body container 30 that can be stored. The cylindrical body passes through the upper opening 87 a and the lower opening 87 b of the coating liquid holder 80, and the cylindrical body is vertically upward with respect to the coating liquid holder 80. This is a coating apparatus that applies a coating solution to the outer peripheral surface of a cylindrical body by relative movement. The coating liquid holder 80 has supply means for supplying the coating liquid to the outer peripheral surface of the cylindrical body located below the lower opening 87b.

  The coating liquid holder 80 includes an upper coating liquid holder 82, a lower coating liquid holder 84, an upper alignment member 92, and a lower alignment member 94, and the upper coating liquid holder 82 and the lower coating liquid holder 84. And the upper alignment member 92 and the lower alignment member 94 are inserted into the notches on the inner side surfaces of the upper coating solution holder 82 and the lower coating solution holder 84, thereby providing a coating solution flow path. 20 and coating liquid discharge slits 81a, 81b, 81c are formed. Here, the coating liquid discharge slits 81a, 81b, 81c discharge the coating liquid perpendicularly to the outer peripheral surface of the cylindrical body penetrating the upper opening 87a and the lower opening 87b of the coating liquid holder 80.

  More specifically, the lower coating solution holder 84 is provided with at least one coating solution supply port 86 for supplying a coating solution for coating the outer peripheral surface of the cylindrical body. Is formed with one groove forming the coating liquid flow path 20 through which the coating liquid supplied from the coating liquid supply port 86 flows. The inner surface of the lower coating liquid holder 84 is provided with a notch portion into which the lower alignment member 94 can be inserted, and the lower surface of the lower coating liquid holder 84 is provided with a hole 24. Yes.

  In addition, the other groove constituting the coating liquid flow path 20 is formed on the lower surface of the upper coating liquid holder 82, and an inclined surface 83 is formed on the upper surface of the upper coating liquid holder 82. The portion having the surface 83 has a guiding shape when the cylindrical body is inserted into the upper opening 87 a and the lower opening 87 b of the coating liquid holder 80. Further, a cutout portion into which the upper alignment member 92 can be inserted is provided on the inner side surface of the upper coating solution holder 82.

  Further, at least one protrusion 96 as shown in FIG. 15 is provided on the lower surfaces of the upper alignment member 92 and the lower alignment member 94. Thereby, coating liquid discharge slits 81a, 81b, 81c are formed as shown in FIG. The configuration is not limited to the above, and one or more projecting portions may be provided on the upper surfaces of the upper alignment member 92 and the lower alignment member 94.

  Further, the “guiding shape” in the coating liquid holder 80 is the same as in the first embodiment, and the inclination angle θ of the inclined surface of the guiding shape is preferably in the range of 30 ° to 70 °. Is in the range of 45 ° to 60 °.

  In the present embodiment, a coating liquid upper discharge slit may be provided as in the second and third embodiments.

  Furthermore, the upper opening 87a and the lower opening 87b are preferably formed of a resin material or covered with a resin material. Thereby, the contact damage of a cylindrical body outer peripheral surface and an opening part can be prevented.

  The operation of the coating apparatus and the coating method are changed from the coating liquid holder 10 and the coating liquid discharge slit 18 (FIG. 4) of Embodiment 1 to the coating liquid holder 80 and the coating liquid discharge slits 81a, 81b, 81c. Since it is the same as that of Embodiment 1 mentioned above except having been performed, the description is abbreviate | omitted.

  The slits described in the first to fourth embodiments may be composed of a plurality of nozzles.

[Embodiment 5]
With respect to the fifth embodiment of the present invention, an example of a coating apparatus will be described below with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same structure as the said Embodiment 1 to Embodiment 4, and the description is abbreviate | omitted.

  As shown in FIG. 16, in the coating liquid holder 10 of the coating apparatus according to the present embodiment, one pole is provided in the center of the upper opening near the upper opening of the upper coating liquid holder 12 in the central direction of the upper opening. The magnet 301 is arranged and embedded so that the On the other hand, a magnet 401 is arranged in a direction in which a reaction force acts on the magnet 301 at least at the lower end portion of the outer peripheral surface of the cylindrical body holder 600 that holds the cylindrical body 500 penetrating from the upper opening. In addition, the lower end of the cylindrical body holder 600 is positioned at or slightly above the lower end of the cylindrical body 500 that is being held.

More specifically, assuming that the height h ₁ from the upper end to the lower end of the inclined surface of the guiding shape in the upper coating solution holder 12 is the magnet 401 densely from the lower end of the cylindrical body holder 600 to h _1. It is preferable that they are arranged. By arranging the magnet 401 in this manner, the cylindrical body 500 is lowered, and when the lower end of the cylindrical body holder 600 approaches the vicinity of the upper opening of the upper coating liquid holder 12, the upper coating liquid holder 12. The magnetic force of the magnet 301 built in the magnet and the magnetic force of the magnet 401 attached to the cylindrical body holder 600 are repelled, and the coating liquid holder 10 slightly moves in the horizontal direction as will be described later, and the lower end of the cylindrical body 500 Can be lowered while penetrating from the upper opening to the lower opening without being brought into contact with the inclined surface of the upper application liquid holder 12.

Furthermore, the length h ₂ to the lower end front from the upper end of the cylindrical body holder 600, it is desirable to mount the appropriate magnet 401 similar to those described above the magnet orientation. For example, when the viscosity of the coating liquid is high, once the lower end portion of the cylindrical body 500 has penetrated into the coating liquid holder 10, the coating liquid level does not fluctuate due to a slight misalignment. As shown in FIG. 16, magnets 401 may be mounted at two locations, the upper end portion of the cylindrical body holder 600 and the middle portion in the longitudinal direction. On the other hand, when the low viscosity of the coating solution, it is desirable to arrange a plurality of magnets 401 at substantially equal intervals in a range of h _2. For example, it is preferable to mount the magnet 401 so that alignment can be achieved by repulsion between magnets every 1 to 5 seconds according to the descent speed and the pulling speed. Thereby, contact scratches between the outer peripheral surface of the cylindrical body 500 and the upper opening of the upper coating solution holder 12 can be prevented.

Further, the magnetic force of the magnet 401 mounted in the range of h _{1 on} the lower end portion of the cylindrical body holder 600 is larger than the magnetic force of the magnet 401 mounted on the other region h ₂ excluding the lower end portion of the cylindrical body holder 600. May be.

  Next, the magnet 401 mounted on the outer peripheral surface of the cylindrical body holder 600 and the magnet 301 built in the coating liquid holder 10 will be described in detail below with reference to FIGS.

  FIG. 17 shows a cross-sectional view of the cylindrical holder 600 where the magnet is attached. As shown in FIG. 17, the magnet 401 attached to the outer peripheral surface of the cylindrical holder 600 includes a segment. The mold magnets 401 a may be arranged in a donut shape on substantially the same plane, and a plurality of segment type magnets 401 a in this donut shape arrangement are arranged along the longitudinal direction of the cylindrical body 600. On the other hand, FIG. 18 shows a cross-sectional view of the upper coating liquid holder 12 where the magnet of the coating liquid holder 10 is embedded. As shown in FIG. 18, the upper coating liquid holder 12 is guided. The segment type magnet 301a may be arranged in a donut shape on the substantially same plane in the vicinity of the inclined surface of the shape. In FIG. 17, the segment-type magnet 401a is arranged so that the south pole faces the outer periphery of the cylindrical holder 600 and the north pole faces the center of the cylindrical holder 600. On the other hand, as shown in FIG. The S pole is arranged in the direction of the inner inclined surface of the upper coating solution holder 12 and the N pole is oriented in the outer direction of the upper coating solution holder 12. Alignment can be achieved by arranging the magnetic force directions of the magnets in the cylindrical body holder 600 and the upper coating liquid holder 12 so as to repel each other as described above. The direction of the magnetic force of the magnet is not limited to this, and the poles shown in FIGS. 17 and 18 may be replaced with the opposite poles to repel the magnetic force between the magnet 401a and the magnet 301a.

  Further, the structure of the magnets constituting the magnets 401 and 301 used for the cylindrical body holder and the coating liquid holder is not limited to the above-described one, and as shown in FIGS. 19 and 20, a substantially rectangular magnet 401b. , 301b may be arranged radially in the outer peripheral surface of the cylindrical body holder 600 and the upper coating liquid holder 12 respectively. At this time, a magnet may be arranged instead of the pole opposite to the pole shown in FIGS. 17 and 18 to repel the magnetic force. Furthermore, the shapes of the magnets 401 and 301 are not limited to these, and any shape or arrangement may be used as long as the magnets can be arranged in a substantially donut shape in cross section.

  The magnetic flux density and the shape of the magnets 301 and 401 may be appropriately selected according to the shape and weight of the upper coating solution holder 12, the outer diameter of the cylindrical body holder 600, the type and viscosity of the coating solution. However, the range of about 0.01-1T is preferable. If the magnetic flux density is smaller than the above range, the centering action due to the fine movement of the upper coating solution holder 12 is difficult to be exhibited. Conversely, if the magnetic flux density is larger than the above range, the moving force becomes large in the vertical and rotational directions and is stable Alignment action cannot be obtained.

  Next, the arrangement and operation of magnets built in the coating liquid holders of the above-described embodiments will be described below.

  As shown in FIG. 21, in the coating liquid holder 10 described in the first embodiment, the magnet 301 is disposed in the vicinity of the beveled slope 13 of the upper coating liquid holder 12. As a result, the lower coating liquid holder 14 slightly moves in the horizontal direction on the base 40 via the ball bearing 34 due to the repulsion of the magnetic force between the magnet 401 (FIG. 16) of the cylindrical holder holding the cylindrical body and the magnet 301. Then, the lower coating liquid holder 14 and the upper coating liquid holder 12 connected and fixed by the bolts 15 slightly move in the horizontal direction. Therefore, the outer peripheral surface of the cylindrical body and the upper opening 17a are not in contact with each other, and a contact scratch on the outer peripheral surface of the cylindrical body can be made.

  As shown in FIG. 22, in the coating liquid holder 50 described in the above-described second embodiment, a magnet 303 may be disposed in the vicinity of the beveled slope 53 of the upper inner coating liquid holder 55, A magnet 304 may be disposed on the upper outer coating solution holder 52, or a magnet may be disposed on both. However, when magnets are arranged on both sides, the magnets are arranged in the same direction. In the case of only the magnet 304, it is desirable to arrange a magnet having a larger magnetic flux density than the magnet used for the magnet 303. With the above configuration, the lower coating solution holder in the horizontal direction on the pedestal 40 via the ball bearing 34 due to the repulsion of the magnetic force between the magnet 401 (FIG. 16) of the cylindrical holder holding the cylindrical body and the magnets 303 and 304. 54 finely moves, and the upper outer coating liquid holder 52 and the upper inner coating liquid holder 55, which are connected and fixed to the lower coating liquid holder 54 with bolts 42 and 44, slightly move in the horizontal direction. Therefore, the outer peripheral surface of the cylindrical body and the upper opening 57a are not in contact with each other, and a contact scratch on the outer peripheral surface of the cylindrical body can be made.

  As shown in FIG. 23, in the coating liquid holder 70 described in the above-described third embodiment, a magnet 305 may be disposed in the vicinity of the beveled slope 73 of the upper inner coating liquid holder 75, A magnet 306 may be disposed on the upper outer coating solution holder 72, or a magnet may be disposed on both. However, when magnets are arranged on both sides, the magnets are arranged in the same direction. When only the magnet 306 is used, it is desirable to arrange a magnet having a magnetic flux density larger than that of the magnet used for the magnet 305. With the above-described configuration, the lower coating solution holder in the horizontal direction on the base 40 via the ball bearing 34 due to the repulsion of the magnetic force between the magnet 401 (FIG. 16) of the cylindrical holder holding the cylindrical body and the magnets 305 and 306. 74 finely moves, and the upper outer coating liquid holder 72 and the upper inner coating liquid holder 75, which are connected and fixed to the lower coating liquid holder 74 by the bolts 42 and 44, slightly move in the horizontal direction. Therefore, the cylindrical outer peripheral surface and the upper opening 77a are not in contact with each other, and a contact scratch on the cylindrical outer peripheral surface can be made.

  As shown in FIG. 24, in the coating liquid holder 80 described in the fourth embodiment, the magnet 307 is disposed in the vicinity of the beveled slope 83 of the upper coating liquid holder 82. With the above configuration, the lower coating solution holder 84 slightly moves in the horizontal direction on the base via the ball bearing due to the repulsion of the magnetic force between the magnet 401 (FIG. 16) of the cylindrical holder holding the cylindrical body and the magnet 307. The upper coating liquid holder 82 that is connected and fixed to the lower coating liquid holder 84 with bolts slightly moves in the horizontal direction. Therefore, the outer peripheral surface of the cylindrical body and the upper opening 87a are not in contact with each other, and a contact scratch on the outer peripheral surface of the cylindrical body can be made.

  All the bolts are made of nonmagnetic stainless steel.

[Embodiment 6]
The fifth embodiment of the present invention will be described below with reference to FIG. In addition, the same code | symbol is attached | subjected to the same structure as the said Embodiment 1, and the description is abbreviate | omitted.

  In the coating apparatus according to the present embodiment, a plurality of the above-described coating apparatuses 100 according to the first embodiment are placed on the overflow pan 90 in parallel.

  Further, the coating liquid storage tank 110 in which the coating liquid 60 is stored and the coating liquid supply port 16 of the coating apparatus 100 are connected by a supply path 116, and a pump 112 and a filter 114 are provided in the supply path 116. On the other hand, the overflow pan 90 and the coating liquid storage tank 110 are connected by a discharge path 118.

  Furthermore, a small amount of coating liquid is stored in advance in the cylindrical body container 30 of the coating apparatus 100, and the inside of the cylindrical body container 30 is maintained at a saturated vapor pressure. After the cylindrical body 500 is lowered using the lifting device 120, coating is performed while raising the cylindrical body 500 as described above.

  The operation of the coating apparatus of this embodiment will be described with reference to FIG.

  The coating liquid is supplied from the coating liquid storage tank 110 to the coating liquid supply port 16 of the coating apparatus 100 through the supply path 116 by the pump 112. Here, the coating liquid once passes through the filter 114, the solid content and the like are removed, and sent to the coating apparatus 100. The overflow coating liquid that has accumulated in the overflow pan 90 along the outer wall of the coating apparatus 100 during the coating operation is collected in the coating liquid storage tank 110 via the discharge path 118. Further, the coating liquid accumulated in the cylindrical body container 30 during the coating operation also flows out from the cylindrical body container 30 to the overflow pan 90 leaving an amount capable of maintaining the saturated vapor pressure. To the coating liquid storage tank 110 through the discharge path 118.

  In this embodiment, the coating apparatus 100 is used. However, the present invention is not limited to this. The plurality of coating apparatuses according to any of the second to fourth embodiments described above are arranged in parallel on the overflow pan 90. It may be placed.

[Embodiment 7]
The endless belt manufacturing apparatus of the present embodiment can use any of the coating apparatuses of the first to fifth embodiments described above, and uses the above-described “cylindrical body” as a “cylindrical mold”. This can be realized by changing the above-mentioned “coating solution” to a “belt forming solution”. Furthermore, the endless belt manufacturing apparatus has means for peeling the coating film formed by applying a belt forming solution on the outer peripheral surface of the mold from the mold, thereby manufacturing a cylindrical endless belt.

  In addition to the steps of the coating method described in Example 1 and Example 4 described above, the endless belt manufacturing method of the present embodiment is coated with a belt forming solution on the outer peripheral surface of the mold. A step of forming, and a step of peeling the formed coating film from the mold.

  By using the endless belt manufacturing apparatus and method, an endless belt having a smooth surface and a uniform thickness can be manufactured.

[Preferred embodiment]

  (1) In the coating apparatus according to the first aspect of the present invention, the supply unit includes a nozzle or a slit formed on the outer peripheral surface of the cylindrical body so as to directly discharge the coating liquid from the tip.

  (2) In the coating apparatus according to (1), at least one of the nozzle or the slit is provided in the vicinity of the upper opening.

  (3) The coating apparatus according to any one of (1) and (1) and (2) above, wherein the coating liquid holder or an upper coating that is one of the constituent members of the coating liquid holder A part of the liquid holder has a mechanism capable of moving in the horizontal direction, and an inclined surface is formed on the inner surface of the upper coating liquid holder, and the portion having the inclined surface is formed by the coating liquid holder. It has a guiding shape when inserting a cylindrical body into the upper opening and the lower opening, and the guiding shape increases the distance from the outer peripheral surface of the cylindrical body to be penetrated in the upward direction from the nozzle or the slit. Is formed.

  (4) In the coating apparatus according to (3) above, the upper opening and the lower opening of the coating liquid holder are formed of a resin material or covered with a resin material.

  (5) In the coating method according to claim 2 of the present application, at least one nozzle or slit is provided in the vicinity of the upper opening of the coating liquid holder, and the coating liquid supplied to the coating liquid holder is the nozzle or slit. The coating liquid is supplied to the outer peripheral surface of the cylindrical body located below the lower opening by supplying the coating liquid to the outer peripheral surface of the cylindrical body, and more coating liquid is supplied to the application liquid holder. Apply while.

  (6) In the coating method according to claim 2, the coating liquid is continuously or intermittently provided from a nozzle or a slit formed on the outer peripheral surface of the cylindrical body so as to directly discharge the coating liquid from the tip portion. Apply while discharging.

  (7) In the coating method according to claim 2 of the present application or any one of (5) and (6) above, the coating liquid holder or an upper coating that is one of the constituent members of the coating liquid holder A part of the liquid holder has a mechanism capable of moving in the horizontal direction, and an inclined surface is formed on the inner surface of the upper coating liquid holder, and the portion having the inclined surface is formed by the coating liquid holder. It has a guiding shape when inserting a cylindrical body into the upper opening and the lower opening, and the guiding shape increases the distance from the outer peripheral surface of the cylindrical body to be penetrated in the upward direction from the nozzle or the slit. When the cylindrical body passes through the opening from above the opening, the lower end of the cylindrical body comes into contact with the leading surface, so that the coating liquid holder or the upper coating liquid holding part is in the horizontal direction. Move to and align

  (8) In the coating method described in (7) above, the upper opening and the lower opening of the coating liquid holder are formed of a resin material or covered with a resin material.

  (9) In the coating method according to claim 2 of the present application and in the above (5) to (8), the coating liquid is supplied to the coating liquid holder, and the coating liquid is overflowed from the coating liquid holder to thereby apply the coating liquid. The coating liquid level in the holder is kept constant.

  (10) In the coating method according to claim 2 of the present application and (5) to (9), the coating solution is supplied to the coating solution holder even during the coating standby.

  (11) A coating liquid holder having an upper opening and a lower opening is provided, a cylindrical body is passed through the upper opening and the lower opening, and the cylindrical body is vertically above the coating liquid holder. In the coating apparatus that applies the coating liquid to the outer peripheral surface of the cylindrical body by relatively moving in the direction, the coating liquid holder is provided with a slit for discharging the coating liquid to the upper edge of the coating liquid holder. Coating device.

  (12) A coating liquid holder having an upper opening and a lower opening is provided, a cylindrical body is passed through the upper opening and the lower opening, and the cylindrical body is vertically above the coating liquid holder. In a coating method in which a coating liquid is applied to the outer peripheral surface of the cylindrical body by relatively moving in the direction, the coating liquid is discharged from a slit provided in an upper end edge of the coating liquid holder.

  (13) In the coating apparatus according to (3) above, at least the lower end portion of the outer peripheral surface of the cylindrical body holder that holds the cylindrical body penetrating from the upper opening has one pole in the center direction of the cylindrical body. A magnet is mounted so as to face, substantially the entire circumference in the vicinity of the upper opening of the coating liquid holder or substantially the entire area in the vicinity of the upper opening of the upper coating liquid holder that is one of the constituent members of the coating liquid holder. Inside the circumference, magnets are arranged and embedded in a direction in which a reaction force acts on the magnets mounted on the cylindrical body wall.

  (14) In the coating apparatus according to (13), the magnets are formed by arranging segment-type magnets on substantially the same plane.

[Example 1]
<Creation of coating liquid>
(Preparation of metal oxide fine particles A)
Zinc oxide: (average particle size 70 μm: prototype manufactured by Teika) 100 parts by weight of 450 parts by weight of toluene and 50 parts by weight of methanol were stirred and mixed, and 0.25 parts by weight of a silane coupling agent (KBM603: manufactured by Shin-Etsu Chemical Co., Ltd.) And added for 1 hour in a sand grinder mill. Thereafter, toluene was distilled off under reduced pressure, and after baking at 150 ° C. for 2 hours, the solution was cooled to room temperature and crushed to obtain surface-treated zinc oxide.

(Preparation of coating solution)
After mixing 33 parts by weight of metal oxide fine particles A, 6 parts by weight of blocked isocyanate (Sumijoule 3175, manufactured by Sumitomo Bayern Urethane) and 25 parts by weight of methyl ethyl ketone for 30 minutes, butyral resin (BM-1, manufactured by Sekisui Chemical Co., Ltd.) 5 Part by weight, 3 parts by weight of a silicone ball (Tospearl 145, manufactured by Toshiba Silicone) and 0.01 part by weight of a leveling agent (silicone oil SH29PA, manufactured by Toray Dow Corning Silicone) were added to the above mixture and 2 in a sand mill. Time dispersion treatment was performed to obtain a coating solution.

The viscosity of the coating solution is “RE500H” type viscometer (manufactured by Toki Sangyo Co., Ltd.) as a viscometer, under the conditions of standard cone (1 ° 34 ′), 25 ° C., shear rate 100 s ⁻¹ , It was 100 mPa · s.

  Coating was performed using an apparatus shown in FIGS. 1 to 4 and the above coating solution using an aluminum pipe of φ30 × 340 mm as a cylindrical body. The inclination angle θ of the inclined surface of the guiding-in shape of the coating liquid holder is 60 °. Also, the diameter of the upper and lower openings of the coating liquid holder is 30.5 mm, the coating liquid holder is 0.1 L / min, and the cylindrical body below the opening is 0.2 L / min. While the liquid was constantly circulated and supplied, the upper part of the inner surface of the cylindrical body was gripped, and the opening provided in the coating liquid holder was penetrated at a constant speed of 500 mm per minute from vertically above. By the time the cylindrical body reached the lowest point, the coating solution filled the coating solution holder and was in an overflow state. Next, the cylindrical body was pulled up at a constant speed of 250 mm per minute to form a coating film on the outer peripheral surface of the cylindrical body. While the cylindrical body moves up and down the opening, the outer peripheral surface of the cylindrical body below the opening is covered with the coating liquid discharged from the slit-like nozzle provided in the opening, and the outer peripheral surface of the cylindrical body by gravity It flowed down more. The applied sample was dried with hot air at 170 ° C. for 40 minutes, and the solidified film was visually observed and the film thickness was measured. Measurement is performed using an eddy current film thickness meter, measuring 300 mm at intervals of 20 mm in the axial direction from the coating start position and 90 ° in the circumferential direction, and the difference between the average film thickness and the maximum and minimum values of the average film thickness (range (Max-min)) was evaluated. The results are shown in Table 1. The reference value (μm) of the range (Max-min) is 3.0 μm.

[Example 2]
In Example 1, the same operation as in Example 1 was performed except that 0.2 L of coating liquid was intermittently supplied at intervals of 10 seconds instead of constantly supplying the coating liquid to the cylindrical body below the opening. The results in Table 2 were obtained.

[Example 3]
(Preparation of coating solution)
15 weight of a hydroxygallium phthalocyanine pigment having diffraction peaks at positions of at least 7.6 ° and 28.2 ° in the Bragg angle (2θ ± 0.2 °) of an X-ray diffraction spectrum using CuKα rays as a charge generation material A mixture of 10 parts by weight of vinyl chloride / vinyl acetate copolymer resin (VMCH, manufactured by Nihon Unicar Co., Ltd.) and 300 parts by weight of n-butyl alcohol as a binder resin was dispersed in a sand mill for 4 hours. Obtained.

Using the “RE500H” type viscometer (manufactured by Toki Sangyo Co., Ltd.) as the viscometer, the viscosity of the coating solution is as follows: standard cone (1 ° 34 ′), 25 ° C., shear rate 40 s ⁻¹ It was 1.8 mPa · s.

  The cylindrical body with a coating film produced in Example 1 was used, and in the apparatus shown in FIGS. 1 to 4, the opening was made of Teflon (registered trademark) resin, and coating was performed using the above coating liquid. The diameter of the upper and lower openings of the coating solution holder is 30.2 mm, and the example is except that the coating solution is circulated and supplied to the 0.1 L coating solution holder per minute while the pulling rate is 185 mm per minute. 1 was applied. However, this time, the application liquid supply to the outer peripheral surface of the cylindrical body below the opening was achieved by liquid leakage from the outer peripheral surface of the cylindrical body and the opening gap. The amount of application liquid supplied to the application liquid holder and the amount of application liquid leaking from the opening were almost equal, and the liquid level in the application liquid holder did not overflow and was stabilized at a fixed position. The coated sample was dried with hot air at 150 ° C. for 7.5 minutes, and measured with a spectral absorption film thickness meter at an interval of 20 mm in the axial direction from the coating start position at an interval of 300 mm and at an interval of 90 ° in the circumferential direction. The difference (range (Max-min)) between the maximum value and the minimum value of the film thickness was evaluated. The reference value (μm) of the range (Max-min) is 0.05 μm. The results are shown in Table 3.

[Example 4]
(Preparation of coating solution)
40 parts by weight of N, N'-bis (3-methylphenyl) -N, N'-diphenylbenzidine and 60 parts by weight of bisphenol Z polycarbonate resin (molecular weight 40,000) were added to 280 parts by weight of tetrohydrofuran and 120 parts by weight of toluene. After sufficiently dissolving and mixing, 10 parts by weight of tetrafluoroethylene resin particles were added and further mixed. At this time, the room temperature was set to 25 ° C., and the liquid temperature in the mixing step was kept at 25 ° C. Then, it disperse | distributed with the sand grinder using a glass bead, and the tetrafluoroethylene resin particle dispersion liquid was created. At this time, 24 ° C. water was passed through the vessel of the sand cylinder, and the temperature of the dispersion was kept at 50 ° C. to prepare a coating solution.

Using the “RE500H” type viscometer (manufactured by Toki Sangyo Co., Ltd.) as the viscometer, the viscosity of the coating solution is as follows: standard cone (1 ° 34 ′), 25 ° C., shear rate 40 s ⁻¹ It was 400 mPa · s.

  Coating was performed using an apparatus shown in FIGS. 1 to 4 and the above coating solution using an aluminum pipe of φ30 × 340 mm as a cylindrical body. The diameter of the upper and lower openings of the coating solution holder is 30.4 mm. 0.1 L / min is applied to the coating solution holder, and 0.2 L / min is applied to the cylindrical body below the opening. While circulatingly supplying, the upper part of the inner surface of the cylindrical body was gripped, and the opening provided in the coating liquid holder was penetrated at a constant speed of 1000 mm per minute from vertically above. Further, when the cylindrical body passed through the opening, the coating liquid holder was moved in the horizontal direction while a part of the lower end of the cylindrical body was in contact with the invitation of the opening, and automatic alignment was performed. By the time the cylindrical body reached the lowest point, the coating solution filled the coating solution holder and was in an overflow state. Next, the cylindrical body was pulled up at a constant speed of 150 mm / min to form a coating film on the outer peripheral surface of the cylindrical body. While the cylindrical body moves up and down the opening, the entire outer peripheral surface of the cylindrical body below the opening is covered with the coating liquid discharged from the slit-like nozzle provided in the opening, and the cylindrical outer surface is affected by gravity. It flowed down. Five similar coating operations were performed continuously at intervals of 10 minutes. While the five coatings were applied, the coating liquid was constantly supplied at a constant flow rate to the coating liquid holder and the slit-like nozzle provided in the opening while circulating at a constant flow rate. The applied sample was dried with hot air at 115 ° C. for 40 minutes, and the solidified film was visually observed and the film thickness was measured. Measurement is performed using an eddy current film thickness meter, measuring 300 mm at intervals of 20 mm in the axial direction from the coating start position and 90 ° in the circumferential direction, and the difference between the average film thickness and the maximum and minimum values of the average film thickness (range (Max-min)) was evaluated. The reference value (μm) of the range (Max-min) is 2.5 μm. The results are shown in Table 4.

[Example 5]
An aluminum pipe with a diameter of 30 × 340 mm was used as the cylindrical body, and coating was performed using the apparatus shown in FIG. The upper coating liquid holder is a segment type permanent magnet 301a whose center direction is the south pole shown in FIG. 18 (surface magnetic flux density 0.48T; neodymium magnet segment type Seiko Sangyo Co., Ltd.) Is used in the circumferential direction, and the shaft of the cylindrical holder 600 has a segment-type permanent magnet 401a (surface magnetic flux density 0.48T; neodymium magnet) whose outer peripheral direction is the S pole. A cylindrical holder 600 embedded with a segment type (Seikou Sangyo Co., Ltd.) was used, the upper inner surface of the cylindrical body 500 was gripped, and the coating liquid holder 70 was provided at a constant speed of 100 mm per minute from vertically above. The upper opening 77a was penetrated. When the lower end portion of the cylindrical body 500 passes through the upper opening 77a, automatic alignment was performed without contact between the inclined surface 73 of the upper inner coating solution holder 75 and the outer peripheral portion of the cylindrical body 500. By the time the cylindrical body 500 reached the lowest point, the coating liquid filled the coating liquid holder and was in an overflow state. Next, the cylindrical body 500 was pulled up at a constant speed of 150 mm per minute to form a coating film on the outer peripheral surface of the cylindrical body. The diameters of the upper opening 77a and the lower opening 77b of the coating liquid holder 70, the circulation amount of the coating liquid, the continuous coating interval, the hot air drying conditions, the film thickness measurement conditions, and the evaluation items are the same as those in Example 6 described later. is there. The results are shown in Table 5.

[Example 6]
<Preparation of coating solution>
(Preparation of metal oxide fine particles A)
Zinc oxide: (average particle size 70 μm: prototype manufactured by Teika) 100 parts by weight of 450 parts by weight of toluene and 50 parts by weight of methanol were stirred and mixed, and 1.25 parts by weight of a silane coupling agent (KBM603: manufactured by Shin-Etsu Chemical Co., Ltd.) And added for 1 hour in a sand grinder mill. Thereafter, toluene was distilled off under reduced pressure, and after baking at 150 ° C. for 2 hours, the solution was cooled to room temperature and crushed to obtain surface-treated zinc oxide.

(Preparation of coating solution)
After mixing 33 parts by weight of metal oxide fine particles A, 6 parts by weight of blocked isocyanate (Sumijoule 3175, manufactured by Sumitomo Bayern Urethane) and 25 parts by weight of methyl ethyl ketone for 30 minutes, butyral resin (BM-1, manufactured by Sekisui Chemical Co., Ltd.) 5 Part by weight, 3 parts by weight of a silicone ball (Tospearl 145, manufactured by Toshiba Silicone) and 0.01 part by weight of a leveling agent (silicone oil SH29PA, manufactured by Toray Dow Corning Silicone) were added to the above mixture and 2 in a sand mill. Time dispersion treatment was performed to obtain a coating solution.

Using the “RE500H” type viscometer (manufactured by Toki Sangyo Co., Ltd.) as the viscometer, the viscosity of the coating solution is as follows: standard cone (1 ° 34 ′), 25 ° C., shear rate 40 s ⁻¹ It was 400 mPa · s.

  Using an aluminum pipe of φ30 × 340 mm as the cylindrical body, coating was performed using the apparatus shown in FIGS. 10 to 13 and the above coating liquid. The inclination angle θ of the inclined surface of the guiding-in shape of the coating liquid holder is 60 °. The diameter of the upper and lower openings of the coating liquid holder is 30.5 mm. While constantly supplying 0.3 L of coating liquid per minute to the coating liquid holder, the upper part of the inner surface of the cylindrical body is gripped and vertically An opening provided in the coating solution holder was passed through from above at a constant speed of 500 mm per minute. Further, when the cylindrical body passed through the opening, the coating liquid holder was moved in the horizontal direction while a part of the lower end of the cylindrical body was in contact with the invitation of the opening, and automatic alignment was performed. By the time the cylindrical body reached the lowest point, the coating solution filled the coating solution holder and was in an overflow state. Next, the cylindrical body was pulled up at a constant speed of 250 mm per minute to form a coating film on the outer peripheral surface of the cylindrical body. 50 similar coating operations were performed continuously at intervals of about 5 minutes. While 50 coatings were applied, the coating solution was constantly supplied at a constant flow rate to the slit-like nozzle provided on the coating solution holder while circulating at a constant flow rate. The applied sample was dried with hot air at 170 ° C. for 40 minutes, and the solidified film was visually observed and the film thickness was measured. Measurement is performed using an eddy current film thickness meter, measuring 300 mm at intervals of 20 mm in the axial direction from the coating start position and 90 ° in the circumferential direction, and the difference between the average film thickness and the maximum and minimum values of the average film thickness (range (Max-min)) was evaluated. The reference value (μm) of the range (Max-min) is 3.0 μm. The results are shown in Table 6.

[Comparative Example 1]
An example of a conventional coating apparatus is shown below. FIG. 26 is a schematic view showing the entire conventional coating apparatus.

  In FIG. 26, the coating apparatus includes a base 201 and a wall member 202 that forms a cylindrical space on the base 201, and the coating liquid is disposed on the upper portion of the cylindrical space A by a pump 204 from a tank 203. Sent to the coating basket 205.

  In the cylindrical space A, a ball screw 206 is disposed along the wall member 202 and can be driven by a motor 207. On the side opposite to the ball screw 206, a base body support 209 for supporting the cylindrical base body 208 up and down is provided, and the cylindrical base body 208 is sandwiched between the upper and lower base body support tools 209.

  The upper substrate support 209 is linked to the substrate support transfer device 210, and the lower substrate support 209 is mounted on the substrate support mounting table 211 on the base 201. A reversing mechanism 212 is disposed between the base 201 and the substrate support mounting table 211.

  The tank 203 and the coating basket 205 are connected by a supply pipe 214 and a recovery pipe 215 through a valve 213. Further, a cleaning mechanism 216 for cleaning the substrate support 209 is provided.

  With the cylindrical base 208 fixed, the coating rod 205 is moved up and down by a motor 207 to form an electrophotographic photosensitive member.

  A coating liquid is sealed in the coating basket 205 by a seal member, a cylindrical base 208 during coating, and a base support 209 during standby, and the coating liquid is always stored in the coating basket 205. Therefore, the liquid can be circulated without causing liquid residue due to drying of the coating liquid. The seal member includes a circular opening for inserting the cylindrical base body. The coating liquid is circulated in the coating basket 205 by the pump 204.

  The coating device of the comparative example takes an extra 2 minutes (per tact) to process one cylindrical body. In addition, the quality of the coated electrophotographic photosensitive member is reliable (quality stability) because, in the comparative example, in the case of a low-viscosity liquid such as a charge generation material, liquid leakage from the seal is likely to occur. There's a problem. Furthermore, extra material costs (coating solution) are required because it is necessary to apply the spacer to the depth of the retentate per coating. Furthermore, there is a problem that extra cleaning and equipment costs are required to remove the liquid applied to the spacers.

  Therefore, it can be seen that Examples 1 to 6 are superior in terms of quality and productivity as compared with conventional coating apparatuses.

[Example 7]
The surface of an aluminum cylinder having an outer diameter of 30 mm and a length of 400 mm is blasted with spherical alumina fine particles (particle size 105 to 125 μm, manufactured by Fuji Seisakusho Co., Ltd.), and roughened to Ra 1.0 μm. A mold agent (trade name: KS700, manufactured by Shin-Etsu Chemical Co., Ltd.) was applied and baked at 300 ° C. for 1 hour to obtain a cylindrical core. Using an N, N-dimethylacetamide solution of polyamic acid (Uimide, manufactured by Unitika Co., Ltd.), the viscosity was adjusted to 1 Pa · s (solid content concentration 10 wt%), and the apparatus shown in FIGS. 1 to 4 was used. Application was performed on the surface of the cylindrical core.

Using the “RE500H” type viscometer (manufactured by Toki Sangyo Co., Ltd.) as the viscometer, the viscosity of the coating solution is as follows: standard cone (1 ° 34 ′), 25 ° C., shear rate 40 s ⁻¹ As described above, it was 1 Pa · s.

  The diameter of the opening of the coating liquid holder is 31.0 mm, and the coating liquid holder is continuously circulated and supplied at a rate of 0.1 L / min to the coating liquid holder and 0.2 L / min below the opening. The upper part of the surface was gripped, and the opening provided in the coating solution holder was passed through at a constant speed of 500 mm per minute from vertically above. By the time the cylindrical body reached the lowest point, the coating solution filled the coating solution holder and was in an overflow state. Next, the cylindrical body was pulled up at a constant speed of 100 mm per minute to form a coating film on the outer peripheral surface of the cylindrical body. While the cylindrical body moves up and down the opening, the outer peripheral surface of the cylindrical body below the opening is covered with the coating liquid discharged from the slit-like nozzle provided in the opening, and the outer peripheral surface of the cylindrical body by gravity It flowed down more. The coated sample was dried at 120 ° C. for 1 hour while rotating at 20 rpm with the axial direction horizontal, and then heated at 200 ° C. for 30 minutes and 380 ° C. for 1 hour with the axial direction of the cylindrical core body vertical. And reacted to obtain a polyimide resin film. After cooling to room temperature, an endless belt made of polyimide resin could be obtained by peeling off the resin film. Visual observation and film thickness measurement of the endless belt were performed. Measurement is performed using an eddy current film thickness meter, measuring 300 mm at intervals of 20 mm in the axial direction from the coating start position and 90 ° in the circumferential direction, and the difference between the average film thickness and the maximum and minimum values of the average film thickness (range (Max-min)) was evaluated. The reference value (μm) of the range (Max-min) is 2.5 μm. The results are shown in Table 8.

The coating apparatus and the coating method of the present invention can be used for any application as long as the coating needs to be formed on the outer peripheral surface of the cylindrical body .

It is a top view which shows the structure of the coating liquid holder of the coating device which concerns on Embodiment 1 of this invention. It is AA 'sectional drawing which shows the structure of the coating liquid holder of the coating device which concerns on Embodiment 1 of this invention. It is BB 'sectional drawing which shows the structure of the coating liquid holder of the coating device which concerns on Embodiment 1 of this invention. It is a figure explaining operation | movement of the coating device which concerns on Embodiment 1 of this invention. It is sectional drawing for demonstrating the guidance shape of the coating liquid holder in Embodiment 1 of this invention. It is sectional drawing explaining the other form of the coating liquid holder in Embodiment 1 of this invention. It is a top view which shows the structure of the coating liquid holder of the coating device which concerns on Embodiment 2 of this invention. It is AA 'sectional drawing which shows the structure of the coating liquid holder of the coating device which concerns on Embodiment 2 of this invention. It is BB 'sectional drawing which shows the structure of the coating liquid holder of the coating device which concerns on Embodiment 2 of this invention. It is a top view which shows the structure of the coating liquid holder of the coating device which concerns on Embodiment 3 of this invention. It is AA 'sectional drawing which shows the structure of the coating liquid holder of the coating device which concerns on Embodiment 3 of this invention. It is BB 'sectional drawing which shows the structure of the coating liquid holder of the coating device which concerns on Embodiment 3 of this invention. It is a figure explaining operation | movement of the coating device which concerns on Embodiment 3 of this invention. It is sectional drawing explaining the structure of the coating liquid holder of the coating device which concerns on Embodiment 4 of this invention. It is a perspective view explaining the structure of the alignment of the coating device which concerns on Embodiment 4 of this invention. It is a figure explaining operation | movement of the coating device which concerns on Embodiment 5 of this invention. It is sectional drawing of the cylindrical body holder of the part with which the magnet in the coating device which concerns on Embodiment 5 of this invention was mounted | worn. It is sectional drawing of the upper part coating liquid holder of the part by which the magnet of the coating liquid holder was embedded in the coating device which concerns on Embodiment 5 of this invention. It is sectional drawing of the other cylindrical body holder of the part with which the magnet in the coating device which concerns on Embodiment 5 of this invention was mounted | worn. It is sectional drawing of the other upper coating liquid holder of the part by which the magnet of the coating liquid holder was embedded in the coating device which concerns on Embodiment 5 of this invention. It is BB 'sectional drawing which shows the structure by which the magnet was mounted | worn with the cylindrical body holder shown in Embodiment 1. FIG. It is AA 'sectional drawing which shows the structure by which the magnet was mounted | worn with the cylindrical body holder shown in Embodiment 2. FIG. It is AA 'sectional drawing which shows the structure by which the magnet was mounted | worn with the cylindrical body holder shown in Embodiment 3. FIG. 6 is a cross-sectional view illustrating a configuration in which a magnet is mounted on a cylindrical holder shown in Embodiment 4. FIG. It is a figure which shows schematic structure of the coating device which concerns on Embodiment 6 of this invention. It is a figure which shows schematic structure of the conventional cylindrical coating apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Coating liquid holder, 12 Upper coating liquid holder, 13 Inclined surface, 14 Lower coating liquid holder, 15 Bolt, 16 Coating liquid supply port, 17a Upper opening part, 17b Lower opening part, 18 Coating liquid discharge slit, 19 Upper coating liquid holder, 20 coating liquid flow path, 24 holes, 30 cylindrical container, 33 bolt, 34 ball, 35 cylindrical container, 36 support base, 38 projecting body, 40 pedestal, 42, 44 bolt, 60 coating liquid, 62 coating film, 500 cylinder.

Claims (7)

A coating liquid holder having an upper opening and a lower opening; a cylindrical body is passed through the upper opening and the lower opening; and the cylindrical body is vertically upward relative to the coating liquid holder In a coating apparatus that applies a coating solution to the outer peripheral surface of the cylindrical body by moving the coating body,
The coating liquid holder has a coating liquid flow path for supplying a coating liquid, and a coating liquid discharge slit connected to the coating liquid flow path.
The coating liquid discharge slit fills the coating liquid between the inner surface of the coating liquid holder and the outer peripheral surface of the cylindrical body when the cylindrical body is passed through the upper opening and the lower opening . The coating apparatus further comprises a supply means for supplying a coating liquid to the outer peripheral surface of the cylindrical body positioned below the lower opening. When the cylindrical body is passed through the upper opening and the lower opening, the coating liquid is filled between the inner surface of the coating liquid holder and the outer peripheral surface of the cylindrical body, and the coating liquid holder The coating apparatus according to claim 1, wherein the coating liquid overflows from the upper end of the coating. The coating liquid holder or a part of the upper coating liquid holder that is one of the constituent members of the coating liquid holder has a mechanism that can move in the horizontal direction, and the inner surface of the upper coating liquid holder The inclined surface is formed, and the portion having the inclined surface has a guiding shape when the cylindrical body is inserted into the upper opening and the lower opening of the coating liquid holder, and the guiding shape is the nozzle Alternatively, the upper end of the cylindrical body is formed so that the distance from the outer peripheral surface of the cylindrical body to be penetrated increases from above the slit. The coating apparatus according to claim 1, wherein the coating liquid holder or the upper coating liquid holding section moves in a horizontal direction to perform alignment by contacting the surface. A magnet is attached to at least the lower end portion of the outer peripheral surface of the cylindrical body holder that holds the cylindrical body penetrating from the upper opening so that one pole faces in the central direction of the cylindrical body, and the coating liquid holder A magnet mounted on the wall of the cylindrical body substantially inside the entire circumference near the upper opening or inside almost the entire circumference near the upper opening of the upper coating liquid holder which is one of the constituent members of the coating liquid holder The coating device according to claim 3, wherein a magnet is disposed and embedded in a direction in which a reaction force acts on the coating device. Possess an upper opening and a lower opening, comprising: a coating liquid flow path for supplying a coating liquid, a coating liquid retainer and a coating solution slits coupled to the coating liquid flow passage, the upper opening In the coating method of applying the coating liquid to the outer peripheral surface of the cylindrical body by penetrating the cylindrical body through the part and the lower opening, and moving the cylindrical body vertically relative to the coating liquid holder,
When penetrating the cylindrical body through the upper opening and the lower opening , the coating liquid is filled between the inner surface of the coating liquid holder and the outer peripheral surface of the cylindrical body through the coating liquid slit, The coating method is characterized in that the coating solution is applied while continuously or intermittently supplying the coating solution to the outer peripheral surface of the cylindrical body located below the lower opening of the coating solution holder. When the cylindrical body is passed through the upper opening and the lower opening, the coating liquid is filled between the inner surface of the coating liquid holder and the outer peripheral surface of the cylindrical body, and the coating liquid holder The coating method according to claim 5, wherein the coating liquid overflows from the upper end of the coating. The coating liquid holder or a part of the upper coating liquid holder that is one of the constituent members of the coating liquid holder has a mechanism that can move in the horizontal direction, and the inner surface of the upper coating liquid holder The inclined surface is formed, and the portion having the inclined surface has a guiding shape when the cylindrical body is inserted into the upper opening and the lower opening of the coating liquid holder, and the guiding shape is the nozzle Alternatively, the upper end of the cylindrical body is formed so that the distance from the outer peripheral surface of the cylindrical body to be penetrated increases from above the slit. The coating method according to claim 5, wherein the coating liquid holder or the upper coating liquid holder moves in a horizontal direction to perform alignment by contacting the surface.