JPH0367264A - Device for coating photosensitive body - Google Patents

Abstract

PURPOSE:To obtain the device for coating a photosensitive body which obviates the sticking of the stains by a photosensitive liquid to the end faces of a cylindrical base body of the phoosensitive body by forming the end faces of spacers to a female type fitting shape with respect to the cylindrical base body. CONSTITUTION:The cylindrical base body 3 of the photosensitive body is held by the upper and lower spacers and is passed axially in the photosensitive liquid 2 housed in the coating liquid container 10 while the outer peripheral surface of the cylindrical base body 3 is brought into sliding contact with an infiltering port 11a on the base of the annular coating liquid container 10, by which the cylindrical base body 3 is coated with the photosensitive liquid 2. Both end faces 30, 30' of the spacers 15 are formed to the female type fitting shape 51 with respect to the cylindrical base body 3 and tapers 52 are provided at both end parts of the outer peripheral surface. The direct contact of the joints where the end faces of the cylindrical base body 3 and the spacers 15 are connected to each other with the coating liquid 2 is obviated in this way and the infiltration of the coating liquid into the joints is obviated. The contamination of the end faces of the cylindrical base body with the coating liquid is thus prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION fa) Industrial Application Field This invention relates to a coating device for coating a photosensitive film on a cylindrical substrate of a photoreceptor.

Cb) Conventional technology The conventional method for forming a photosensitive film on the outer circumferential surface of a cylindrical substrate of a photoreceptor is a dip coating method in which the cylindrical substrate is dipped into a photosensitive liquid in a coating tank and then pulled up. there were. This method had poor processing efficiency and was expensive at night (photosensitive), making the product (photoreceptor) expensive as well, so it was not an appropriate method. Therefore, recently there has been a shift to a substrate moving method in which a cylindrical substrate is passed through a photosensitive liquid contained in a ring-shaped coating liquid container.

The outline of the above-mentioned substrate moving type photoreceptor coating apparatus will be explained.

FIG. 5 shows a schematic configuration of the cylindrical base of the photoreceptor and the main parts of the photoreceptor coating device.

An entry port 11a of the cylindrical base body 3 is opened at the center of the bottom surface of the ring-shaped shallow dish 11, and a ring-shaped blade 12 is attached to the entry port 11a. The inlet 11a of the ring-shaped shallow dish 11 has no wall, and instead, the cylindrical base 3 comes into sliding contact with the ring-shaped blade 12, thereby preventing the photosensitive liquid 2 from flowing out from the shallow dish 11. . The cylindrical base body 3 is held by upper and lower spacers 15a and 15b, and the ring-shaped blade 12 is fixed by a blade holding member 13. Spacers 15a and 15b
The upper and lower end surfaces of the cylindrical base 3 have a male fitting shape as described later (see FIG. 4). A lid 18 is provided on the top of the law 11, and an opening having a diameter slightly larger than the diameter of the cylindrical base is formed in the center of the i18. Ring-shaped coating liquid container 1 containing photosensitive liquid 2
0 is composed of a rule 11, a ring-shaped blade 12, a blade holding member 13, a cylindrical base 3, and M18.

This ring-shaped coating liquid container 10 is fixed to a frame 17 at a plate holding member 13. The spacer chuck 14 fixes the upper and lower spacers 15a15b, which hold the cylindrical base 3 of the photoreceptor, at predetermined positions.

When either the upper or lower spacers 15a, 15b are fixed to the spacer chuck 14, Rule 11, ring-shaped blade 12, blade holding member 13, spacer 15a
Alternatively, 15b and ff118 constitute a ring-shaped coating liquid container 10, which accommodates the photosensitive liquid 2. Further, the push-up jig 16 pushes up the lower spacer 15b while holding the cylindrical base 3, and causes the cylindrical base 3 to pass through the photosensitive liquid 2 in the ring-shaped coating liquid container 10.

FIG. 4 is a sectional view of the fitting portion between the spacer and the cylindrical base. Both end surfaces of the spacers 15a and 15b have a male fitting shape with respect to the cylindrical base. 3'' is a cylindrical substrate to be coated next. End surfaces 30 and 30'' of the cylindrical substrate pass directly through the outer peripheral surface.

The coating operation will be explained. With the upper spacer 15a fixed by the spacer chuck 14, the upper and lower spacers 1
The cylindrical base 3 is set between 5a and 15b. A push-up jig 16 is driven by a motor (not shown) to push up the upper and lower spacers 15a and 15b together with the cylindrical base 3 held therebetween in the direction of the arrow. At this time, the outer circumferential surface of the cylindrical base 3 slides on the inner diameter side of the ring-shaped blade 12 and comes into direct contact with the photosensitive liquid 2 instead of the spacer 15a.
1 is formed. When the coating operation is completed, the cylindrical base 3
The lower spacer 15b is fixed to the spacer chuck 14 in close contact with the ring-shaped blade 12 to prevent the photosensitive liquid 2 from flowing out.

As described above, in the photoreceptor coating equipment using the substrate movement method, the amount of photosensitive liquid used in relation to the amount of coating is significantly smaller than that in the dip coating method, resulting in extremely high coating efficiency, and the equipment is also compact. Therefore, it is possible to reduce the cost of the photoreceptor.

(C) Problems to be Solved by the Invention However, the above-mentioned photoreceptor coating device had the following drawbacks in the fitting portion between the spacer and the cylindrical substrate.

When the cylindrical base is set in the spacer, the two become an integrated cylinder/column, the end face of the cylindrical base forms a joint, and the joint passes directly through the outer peripheral surface. Therefore, the photosensitive liquid enters through the joint and adheres to the end surface of the cylindrical substrate. A photoreceptor with photosensitive liquid attached to the end surface may be damaged during the subsequent process of manufacturing the photoreceptor, such as when crimping or gluing the flange to the photoreceptor, due to the photoreceptor film adhering to the end surface of the cylindrical base. will occur.

Therefore, conventionally, as a post-coating process, it was necessary to wipe off the photosensitive liquid adhering to the end surface of the photoreceptor with a cloth or a solvent.

SUMMARY OF THE INVENTION An object of the present invention is to provide a photoconductor coating device that does not cause stains caused by photosensitive liquid on the end surface of a cylindrical substrate of a photoconductor.

FD1 Means for Solving the Problems In this invention, a ring-shaped coating liquid container has a hole inlet on the bottom surface.
While the outer peripheral surface of the cylindrical base of the photoreceptor is in sliding contact with the cylindrical base, the cylindrical base is held by upper and lower spacers and the photosensitive liquid stored in the coating liquid container is passed in the axial direction. In the photoreceptor coating apparatus for applying the photoreceptor to the spacer, both end surfaces of the spacer are formed into a female-fitting shape with respect to the cylindrical base, and both ends of the outer circumferential surface are tapered.

(81 Effect) In the photoconductor coating device according to the present invention, the end surface of the spacer that centers the cylindrical substrate of the photoconductor to be coated is formed into a female-fitting shape. Therefore, the end surfaces of the cylindrical substrate and the spacer The joint where the spacer is connected does not come into direct contact with the photosensitive liquid, and the photosensitive liquid does not enter the joint, preventing the end surface of the cylindrical substrate from being contaminated with the photosensitive liquid.Furthermore, the edge of the outer peripheral surface of the spacer Since it is tapered, it passes smoothly inside the ring-shaped blade at the inlet of the coating liquid container and does not damage the ring-shaped blade.

((Embodiment I) FIG. 3 is a schematic configuration diagram of a photoreceptor coating apparatus which is an embodiment of the present invention. The same parts as in FIG. 5 are designated by the same numbers. Only the spacer 15 described later is different. However, since the general structure of the device and the coating operation are exactly the same, the explanation will be omitted.

FIG. 1 is a sectional view of a cylindrical base of a photoreceptor set in a spacer of the photoreceptor coating device. Spacer 15
Female fitting portions 51 are provided on both end faces of the holder. The cylindrical base 3 is fitted inside the cylindrical base, and the end face 30 of the cylindrical base does not directly appear on the outer peripheral surface. As a result, the photosensitive liquid does not enter the end face portion of the cylindrical substrate, and the end face 30 is not contaminated with the photosensitive liquid. Additionally, a tapered portion 52 is provided on the outer periphery of the end of the spacer.
As a result, there is no step formed at the connecting portion with the cylindrical base 3, and the liquid can pass through smoothly without damaging the ring-shaped blade of the coating liquid container and without leaking.

Next, dimensions will be explained. The part 7!1 of the female fitting part of the spacer that covers the cylindrical base body is required to be at least one part.

If a photosensitive liquid with a low viscosity of a few cP is used in the absence of laminate, the photosensitive liquid will enter from the fitting portion and stain the end surface of the cylindrical substrate.

Further, the difference 12 between the maximum outer diameter of the spacer and the outer diameter of the base must be 3u or less. If it is larger than 3 + n, the ring-shaped blade will be damaged when passing through the ring-shaped blade, causing liquid leakage or the like.

In this embodiment, the female fitting part is simply concave, but it may be made into a shape in which a tube of a cylindrical base body is fitted, as shown in FIG.

(G1 Effects of the invention As described above, according to this invention, the end face of the spacer is formed into a female-fitting shape with respect to the cylindrical base, so the end face of the cylindrical base does not pass directly through the outer circumferential surface, so it is not contaminated with photosensitive liquid. In addition, the outer periphery of the end of the spacer is tapered so that it does not damage the ring-shaped blade (it passes smoothly and there is no leakage. The step of wiping off the end face can be omitted.

3-Cylindrical base body, 30.30” one end face, 15-Spacer, 51-Female fitting portion, 52-Tapered portion.

Claims (1)

[Claims] (1) While the outer circumferential surface of the cylindrical base of the photoreceptor is in sliding contact with the inlet on the bottom of the ring-shaped coating liquid container, the cylindrical base is held by upper and lower spacers and housed in the coating liquid container. In a photoreceptor coating device that applies the photoreceptor to a cylindrical substrate by passing the photoreceptor through the photoreceptor in the axial direction, both end surfaces of the spacer are formed into a female fitting shape with respect to the cylindrical substrate, and the outer periphery is A photoconductor coating device characterized by having tapers at both ends of the surface.