JPH0764447A - Flanged photoconductor - Google Patents

Abstract

PURPOSE:To prevent an adhesive from flowing out and to reduce changes in the axes of a base portion and a flange portion so as to enhance deflecting accuracy by providing an adhesive guide passage in the flange portion, channeling a cylindrical hollow portion provided in a portion where a cylindrical hollow base portion is fitted to the flange portion, and channeling the flange portion. CONSTITUTION:In order to fabricate an electrophotographic photoconductor having flange portion 1 at one or both ends, a groove 4 is cut on the surface of contact of a cylindrical hollow base portion 6 with a faucet portion 7, and a narrow passage 3 leading to the channel 4 is provided outside the flange. After the flange portion 1 is fitted into the cylindrical hollow base portion 6, an adhesive is injected from an adhesive passage 3 and set. Accuracy is increased with a very small tolerance allowed for the size of fit between the faucet portion 7 of the cylindrical hollow base portion 6 and the flange portion 1, so as to prevent the adhesive from flowing out and to reduce changes in the axes of the base portion and the flange portion 1, thereby improving deflecting accuracy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photoconductor of an electrophotographic apparatus having a flange portion at one end or both ends.

[0002]

2. Description of the Related Art FIG. 10 is a sectional view of a conventional flange portion, and FIG. 11 is a sectional view of a conventional cylindrical hollow substrate portion.
FIG. 12 is a cross-sectional view of a conventional flanged photoreceptor. Conventionally, in the case of joining the cylindrical hollow base portion 16 and the flange portion 21, a plug-integrated flange portion 21 is separately manufactured in accordance with the end shape of the cylindrical hollow base portion 16, and the plug of the cylindrical hollow base portion 16 is installed. The method of applying the adhesive 20 to the portion 17 and then fitting and adhering the flange portion 21 thereto has been performed.

[0003]

However, the conventionally used flanged photoreceptor has the following problems.

The spigot portion 1 of the cylindrical hollow base portion 16
If the flange 21 is not fitted immediately after the adhesive 20 is applied to 7, especially when the viscosity is low, the adhesive 20 flows out and the adhesive strength is lowered, and the adhesive 20 that has flowed out adheres to the photosensitive surface to make a copy. Image defects and the like occur.

Cylindrical hollow base portion 16 Inlay portion 17
After applying the adhesive agent 20 to the flange portion 21, the adhesive agent 20 is pushed into the inside 16 of the base due to the light pressure fitting of the flange portion 21, and the adhesive force is reduced and the adhesive agent 20 adheres to the ground plate 11 to cause a ground failure. Become.

Since the adhesive 20 flows out, more adhesive 20 than necessary is required.

The cost increases because a precise adhesive application device is required.

When the flange portion 21 has a central axis of rotation, the adhesive 20 is applied to the spigot portion 17 of the cylindrical central base portion 16, so that a clearance (tolerance) corresponding to the thickness of the adhesive 20 is required. . This makes it difficult to match the axial center of the flange portion 21 with the center of the cylindrical hollow base portion 16.
That is, if the adhesive 20 is applied to the cylindrical hollow base portion 16 and the flange portion 21 is inserted in a fitting relationship, the center axis of the cylindrical hollow base portion 16 is displaced. On the contrary, if there is no gap and the relationship is a pressure fitting, the central axis is changed due to the force fitting, and the cylindrical hollow base portion 1
As a result of 6 being raised, when it is necessary to obtain a flat end portion, it is necessary to increase the inner diameter of the spigot portion 17.

The ground failure will now be described with reference to the explanatory view of the embodiment of the conventional apparatus shown in FIG. 9. The ground of the photosensitive drum is attached to the basic inner surface and the flange portion 21,
The grounding is achieved by continuity with the grounding plate 11. However, if the adhesive 20 adheres to the inner surface of the base body, resistance will not be established between the grounding plate 11 and the base body, and the grounding plate 11 and the base body will not be in conduction. .

[0010]

The present invention has been made for the purpose of solving the above-mentioned problems, in which a photosensitive layer is coated,
A flanged photoconductor comprising at least one open cylindrical hollow base portion and a flange portion at one or both ends of the cylindrical hollow base portion, wherein the adhesive guide path of the flange portion and the cylindrical shape A flanged photoreceptor having a groove portion of the cylindrical hollow base portion provided in a fitting portion of the hollow base portion and the flange portion and a groove portion of the flange portion.

[0011]

According to the above structure, the following effects are obtained.

1. By making the fitting dimensions of the spigot part and the flange part of the cylindrical hollow base part extremely small to improve the accuracy, the outflow of the adhesive is eliminated and the change in the central axis of the base part and the flange part is reduced, and the runout accuracy is improved. Get better.

2. Since the adhesive is injected after the fitting of the flange portion, the adhesive is not pushed out into the inside of the base portion by the flange member, so that no grounding failure occurs.

3. Since the adhesive does not flow out, the amount of the adhesive can be reduced and the material cost can be reduced.

4. It does not require a precision adhesive application device (dispenser) and can be used with simple injectors.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details will be described below based on the embodiments of the present invention shown in the drawings. Needless to say, the present invention is not limited to these examples.

FIG. 1 is a sectional view of the flange portion of the present invention, and FIG.
Is a cross-sectional view of a cylindrical hollow substrate portion, and FIG. 3 is a cross-sectional view of a flanged photoreceptor of the present invention. More specifically, according to the present invention, in order to manufacture an electrophotographic photosensitive member having a flange portion at one end or both ends, a width of 2.0 to 3.0 mm, a depth of 2.0 to 3.0 mm, and a depth are provided on a surface of the cylindrical hollow substrate portion 6 in contact with the inlay portion 7. 1.5 to 3.0 mm
After the groove is cut and a narrow passage communicating with the groove is provided outside the flange to fit the flange portion 1 to the cylindrical hollow base portion 6, the adhesive 10 can be injected from the adhesive passage 3 and solidified. Photoconductor for electrophotographic device. As the flange material, ABS resin is used alone or in combination.

The outer diameter (A) of the flange body 1 of FIG. 1 is shown in FIG.
After being fitted into the spigot portion 7 of the cylindrical hollow base portion 6 of the above, the adhesive is injected into the cavity portion 5 formed in the spigot wall and the flange outer diameter portion from the adhesive pouring port to solidify the adhesive, and the flanged photosensitive Form the body. As another example of the above, the flanged photoreceptor of the present invention shown in FIGS. 4, 5, 6 and 7 will be described below.

FIG. 4 shows an embodiment in which only the adhesive injection port 2 is formed in the flange portion 1, the groove portion is not formed on the flange portion 1 side, and the groove 22 is formed in the cylindrical hollow substrate portion 6. Figure 5
Shows an embodiment in which the adhesive injection port 2 and the adhesive groove 4 are formed in the flange portion 1, and the groove 22 is also formed in the cylindrical hollow substrate portion 6. Further, FIGS. 6 and 7 can be given as examples in which the accumulation portion of the adhesive 10 is formed on the outer peripheral surface of the flange portion 1.
6 and 7, the flange portion 1 has the same shape, and the outer peripheral end surface of the cylindrical hollow substrate portion 6 is cut into the C plane in FIG.
The only difference is that it is a bent part.

FIG. 8 is an explanatory view of an embodiment of the present invention, showing an adhesive injection method. The flange portion 1 is lightly fitted to the cylindrical hollow base portion 6, and the needle 9 of the press-fitting device 8 containing the adhesive 10 (polysilacpond) is inserted into the adhesive injection port 2 of the flange portion 1 and the manual pressure is applied. Inject a specified amount. In this case, specifically, the fitting accuracy is improved and the flange portion 1
Is lightly fitted to the cylindrical hollow substrate portion 6 first and the high-viscosity adhesive (500 to 2000 cp) is injected, so that the adhesive 10 does not go around. Also, once injected, the adhesive does not flow out until it solidifies naturally due to its high viscosity and surface tension. Further, by improving the fitting accuracy of the flange and the cylindrical hollow base portion 6 (light pressure fitting), the flange portion 1 does not move or come off due to movement or vibration of the drum.

Details of Table 1 will be described below.

[0022]

[Table 1]

In Example 1, a photosensitive layer is provided on the surface of a cylindrical hollow base member 6 made of an aluminum alloy having an outer diameter (C), an inner diameter (B) and a length (D), which is machined as shown in FIG. A flange as shown in Fig. 1 is used for the electrophotographic photosensitive member at 10 kg /
cm 0 ² of two-part adhesive 10 engaged light press fit with a pressure syringe at a pressure from the adhesive inlet 2 of 5 kg / cm ² using.
After injecting 5 g and naturally drying for 24 hours, a flange torque test earth inspection, a shake inspection and a copy image evaluation were performed.
The composition of the adhesive is shown below.

* Two-component adhesive (Sanyo Kasei) Viscosity 500 cp Main component Acrylic ester copolymer (main): Polysic bond 610-SA ... 100 parts (Curing material): Polybond AY-651C .. ... 22 parts (solvent): MEK (methyl ethyl ketone) ... 58 parts The above proportions were compounded and uniformly mixed.

Example 2 shows the results when the one-component type was used as the adhesive in the same manner as in Example 1. The composition of the adhesive is shown below.

* One-component adhesive (Sekisui k.k) Esdyne No. 272 Viscosity 1000 cp Main component chloroprene rubber Solvent MEK (methyl ethyl ketone) Example 3 is the same method as in Example 1 and the amount of the two-component adhesive is 0. The results of the same inspection and evaluation as in Example 1 with the cost reduced from 0.5 g to 0.25 g are shown.

In Example 4, the same method as in Example 1 was used to perform light pressure fitting with the same dimensional tolerance of the dimensions of the spigot portion 7 of the aluminum alloy cylindrical hollow base portion 6 and the outer diameter of the flange portion 1 as in the prior art. The result is shown.

In Comparative Example 1, the outer surface (C), the inner diameter (B) and the length (D) of the hollow cylindrical hollow base member 6 made of a machined aluminum hollow cylindrical base member 6 (FIG. 2) is exposed to light. An electrophotographic photosensitive member provided with a photosensitive layer was coated with the same amount of adhesive as in Example 1 on the base portion inlay portion 7 by a conventional method, and the flange outer diameter (A) was fitted thereto. The same inspection and evaluation results as in Example 1 are shown after natural drying for an hour.

Comparative Example 2 shows the same inspection and evaluation results as in Example 1 except that one-component esdyne No272 was used as an adhesive in the same manner as in Comparative Example 1. To summarize the results, it can be seen that the runout accuracy is improved, the ground failure is completely eliminated, and the flange torque is improved as compared with the conventional one. No image defects have occurred.

Others The present invention is not limited to the embodiments described above and shown in the drawings, and it is needless to say that the present invention can be appropriately modified and implemented without departing from the scope of the invention.

[0031]

According to the present invention, the following effects can be obtained with the above structure.

1. By making the fitting dimensions of the spigot part and the flange part of the cylindrical hollow base part extremely small to improve the accuracy, the outflow of the adhesive is eliminated and the change in the central axis of the base part and the flange part is reduced, and the runout accuracy is improved. Get better.

2. Since the adhesive is injected after the fitting of the flange portion, the adhesive is not pushed out into the inside of the base body by the flange member, so that no grounding failure occurs.

3. Since the adhesive does not flow out, the amount of the adhesive can be reduced and the material cost can be reduced.

4. It does not require a precision adhesive application device (dispenser) and can be used with simple injectors.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a flange portion of the present invention.

FIG. 2 is a sectional view of a cylindrical hollow substrate portion.

FIG. 3 is a sectional view of a flanged photoreceptor of the present invention.

FIG. 4 is a sectional view of a flanged photoreceptor of the present invention.

FIG. 5 is a sectional view of a flanged photoreceptor of the present invention.

FIG. 6 is a sectional view of a flanged photoreceptor of the present invention.

FIG. 7 is a sectional view of a flanged photoreceptor of the present invention.

FIG. 8 is an explanatory diagram of an example of the present invention.

FIG. 9 is an explanatory diagram of an example of a conventional device.

FIG. 10 is a sectional view of a conventional flange portion.

FIG. 11 is a cross-sectional view of a conventional cylindrical hollow substrate portion.

FIG. 12 is a cross-sectional view of a conventional flanged photoreceptor.

[Explanation of symbols]

 1 Flange Main Body (Flange Part) 2 Adhesive Injection Port 3 Adhesive Passage (Tunnel) 4 Adhesive (Curing) Groove 5 Adhesive (Curing) Cavity 6 Cylindrical Hollow Base Part 7 Inlay Part 8 Press-in Device 9 Needle 10 Adhesive (Polysic Bond) 11 Earth Plate 16 Cylindrical Hollow Base Part 17 Inlay Part 20 Adhesive 21 Flange Body (Flange Part) 22 Groove (Cylindrical Hollow Base Part Groove)

Claims (1)

[Claims] 1. A flanged photoconductor comprising a cylindrical hollow base portion having a photosensitive layer coated thereon, at least one of which is open, and a flange portion at one or both ends of the cylindrical hollow base portion, wherein the flange And a groove part of the cylindrical hollow base part and a groove part of the flange part provided in a fitting part of the cylindrical hollow base part and the flange part. Attached photoconductor.