JP5495621B2 - Electrophotographic photosensitive member, specific position detection system in the circumferential direction of the electrophotographic photosensitive member, electrophotographic photosensitive member unit, and electrophotographic apparatus - Google Patents

Description

The present invention electronic photographs feeling light body for use in an electrophotographic apparatus, the circumferential direction of the specific position detecting system of the electrophotographic photosensitive member, an electronic photograph feeling light body unit and electronic photographic device.

As an image forming apparatus using an electron photograph feeling light body, a copying machine, a facsimile apparatus, is widely used, such as a printer, which is an output means of the computer. Such an image forming apparatus has been attracting attention because it has features such as good image quality and high-speed printout.
In such an image forming apparatus, digitization and colorization are rapidly progressing in recent years. In addition , the image forming apparatus has a rapidly increasing opportunity to form not only characters but also images such as photographs and pictures. As a result, the demand for higher image quality of image forming apparatuses has been increasing. Here, “high image quality” refers to, for example, high resolution and small density unevenness. In particular, discrimination of density unevenness may be easy for human eyes, and the demand for reducing density unevenness is extremely high.

One cause of density unevenness, and a non-uniformity of charging characteristics and photosensitivity characteristics of the electronic photograph feeling light body. Non-uniformity of charging characteristics and photosensitivity characteristics, due to non-uniformity of the quality and thickness of the thin film constituting the electronic photograph feeling light body.
In order to solve such a problem, in recent years improvements advances in manufacturing methods and manufacturing apparatus for an electronic photograph feeling light body, non-uniformity of the quality and thickness of the thin film constituting the electronic photograph feeling light body is reduced, As a result, the reduction in density unevenness is also progressing.

However, there is still room for improvement. For example, if the stability and durability are often amorphous silicon used in high-speed copying machine having an excellent (a-Si) laden electronic photograph sensitive optical member (hereinafter, abbreviated as a-Si photosensitive body.) In general, a plasma CVD method is used as the manufacturing method. However, the feature of a plasma CVD method, throughout the required size of the electronic photograph feeling light body, it is not easy to form a uniform film quality and thickness.
Patent Document 1 discloses an image forming apparatus corresponding to such a problem. In the image forming apparatus described in Patent Document 1, an image forming apparatus in which memory for storing characteristic information corresponding to the distribution of the charging characteristics of premeasured electronic photographs feeling light body is mounted on the electronic photograph feeling light body It is disclosed. The image forming apparatus controls the exposure operation of the exposure unit based on the characteristic information, and suppresses the nonuniformity of the image density.

JP-A-2005-227452

The image forming apparatus described in Patent Document 1, in the case of performing the exposure control in the circumferential direction of the electronic photograph feeling light body, a charging characteristic information not only the circumferential direction of the reference position of the electronic photograph sensitive optical member (hereinafter, Also called “home position.”) Information needs to be measured in advance.
Also, when installing the electronic photograph feeling light body to the image forming apparatus, since there is a case of installing the electronic photograph feeling light body to the image forming apparatus in accordance with the circumferential direction of the home position of the electronic photograph feeling light body , the circumferential direction of the home position of the electronic photograph sensitive optical member is required to be those that can be visually easily recognized.

Therefore, the electronic photograph sensitive optical member should have marks visually recognizable as a circumferential direction of the home position is provided, and the mark is in measuring the charging characteristics, provided on a charging characteristic measuring apparatus circumferential It must be detected by the direction of the home position detecting mechanism.
Further, the marks need to be durable against peeling in the above-described operations in each process and transportation between the processes.

The present inventors first examined for detecting the circumferential direction of the home position when measuring the charging characteristics of the electronic photograph feeling light body.
The place to install the mark indicating the circumferential direction of the home position, the end of the order to eliminate as much as possible the influence of the image by mark installation, portions other than the light-sensitive surface of the electronic photograph sensitive optical member, i.e., electronic photographs feeling light body It needs to be a part.

Figure 1 (a) and (b) is a diagram schematically showing an end face of the electronic photograph feeling light 1001, from A in the figure the direction of electronic photographs sensitive optical member 1001 in FIGS. 1 (a) The viewed surface is shown in FIG.
Then, as the apparatus for detecting the circumferential direction of the home position of the electronic photograph feeling light body, because it is preferable to detect the mark in a non-contact to the electronic photograph sensitive optical member, an electronic photograph sense a laser beam irradiating the end face of the optical body, the method of detecting a mark provided on the electronic photograph feeling light body by measuring the strength of the direct reflection light is generally used. Specifically, when the irradiation light passes through the mark, the mark is detected by the direct reflection light being weakened.

Figure 2 is a schematic view of a measuring directly reflected light and the intensity of the direct reflection light 2004 of light 2003 irradiated from the laser light source 2001 to the end face 2002 of the electronic photograph sensitive optical member is measured by the sensor 2005 Yes.
However, in the end face 2002 of the electronic photograph feeling light body, in the process of manufacturing an electronic photograph sensitive optical material in the plasma CVD method, or adheres deposited film, there is a case where minute scratches will be formed . In such a case, when the irradiation light 2003 passes through the deposited film or a minute scratch, the direct reflected light 2004 may be weakened, and the mark may not be identified stably.
The present inventors diligently investigated this problem. As a result, it measures the intensity of the scattered light of the light such as laser irradiated, and a smooth shape formed mark surface mark by attaching a coating material to an end face of the electronic photograph feeling light body Thus, it has been found that the above-described problem of erroneous detection can be solved.

Figure 3 is a schematic diagram in the case of measuring scattered light, FIG. 3 (a) is a case of measuring the portion where the paint does not adhere, FIG. 3 (b) when measuring the mark portion 3001 by paint It is. Also the intensity of the scattered light 3005 of light 3004 irradiated from the laser light source 3002 to the end face 3003 of the electronic photograph sensitive optical member is measured by the sensor 3006.
Here, there is a difference in surface smoothness between the portion where the paint is not attached and the portion where the paint is attached. As a result, in order toward the portion where the paint surface is smooth is attached is less scattering of light, a difference occurs in the intensity of the scattered light 3005, it is possible to detect the mark 3001 by paint.
Further, it is possible by attaching the coating as a mark indicating the circumferential direction of the home position, a form can be recognized easily circumferential direction of the home position even visually. Accordingly, the time of installation of electronic photographs feeling light body to the image forming device is also easily be installed in the image forming apparatus an electronic photograph sensitive optical body in accordance with the circumferential direction of the home position of the electronic photograph feeling light body And the above-described visual recognition problem can be solved.
We next examined an resistance to peeling of a mark is formed by depositing a coating on top of a recess the recess on the end face of the electronic photograph feeling light body It has been found that the adhesion of the paint is improved by applying the paint. As a result, it is possible to eliminate the problem of durability against mark peeling in the above-described operations in each process and transportation between the processes.

4A and 4B are examples of schematic views of a recess 4002 formed on the end surface 4001 of the electrophotographic photosensitive member and a paint 4003 attached on the recess. FIG. 4C is a cross-sectional view taken along the dotted line B in FIG.
As described above, a concave portion is formed on the end surface of the electrophotographic photosensitive member, and paint is deposited on the concave portion to form a mark having a smooth surface, thereby obtaining a home position in the circumferential direction. Furthermore, as a means for detecting the home position in the circumferential direction when measuring the charging characteristics of the electrophotographic photosensitive member, laser light is applied to the end surface of the electrophotographic photosensitive member and the scattered light is detected as described above. The present inventors have found that there is a great effect on the problem and have completed the present invention.
That is, the electrophotographic photoreceptor of the present invention is an electrophotographic photoreceptor having a cylindrical substrate and a photoconductive layer formed on the cylindrical substrate,
Mark indicating the circumferential reference position of the electrophotographic photosensitive member, are made form the end face of the cylindrical substrate,
The mark
A recess,
A paint adhering to cover all of the recesses on the recesses;
It is a mark formed with
The shape of the recess is a shape in which the grooves are connected in an annular shape,
Arithmetic average roughness Ra of the surface of the mark (JIS B 0601-1994, evaluation length 0.3 mm) is, is characterized in der Rukoto below 0.1 [mu] m.
Further, the circumferential specific position detection system of the electrophotographic photosensitive member of the present invention is a system for detecting the circumferential specific position of the electrophotographic photosensitive member of the present invention, and is a result of irradiating the end surface with light. The position of the mark is detected by measuring the generated scattered light, and a specific position in the circumferential direction is detected.
The electrophotographic photosensitive member unit of the present invention is an electrophotographic photosensitive member unit in which at least one flange is attached to the electrophotographic photosensitive member of the present invention, and at least one mark is provided on at least one of the flanges. The flange is assembled to the end of the electrophotographic photosensitive member so that the positional relationship between the mark provided on the end surface and the mark provided on the flange is a predetermined positional relationship. It is a feature.
The electrophotographic apparatus of the present invention is the electrophotographic apparatus having the electrophotographic photosensitive member unit of the present invention, wherein the electrophotographic apparatus has a rotating mechanism of the electrophotographic photosensitive member unit, and the rotating mechanism Having a specific position specifying member in the direction, the electrophotographic apparatus has a mechanism for detecting the specific position specifying member in the circumferential direction, and when the electrophotographic photosensitive member unit is installed in the electrophotographic apparatus, The positional relationship between the specific position specifying member in the circumferential direction and the mark provided on the flange is a predetermined positional relationship.

In the present invention, a recess on the end face of the cylindrical substrate, and the surface is deposited a coating over the recess and in the circumferential direction of the home position to form a smooth mark. Further, the end surface of the cylindrical substrate is irradiated with laser light, and the mark is detected by the scattered light. Thus, the circumferential direction of the home position to realize that detected without erroneous detection, and the circumferential direction of the visual recognizability and electronic photographs feeling durability can be realized for the peeling of the home position of the electronic photograph feeling light body it is possible to provide a circumferential direction of the specific position detecting system of the optical body and electronic photographs feeling light body.

The end surface of the electronic photograph sensitive optical body according to the present invention is a schematic diagram showing. Is a schematic diagram showing an example of a circumferential direction of the home position detecting method for an electronic photograph feeling light body. It is a schematic diagram showing an example of a circumferential direction of the home position detecting method for an electronic photograph sensitive optical body according to the present invention. An example of a coating material was deposited on the electron photograph feeling recess and the recess formed in the end face of the optical body according to the present invention is a schematic diagram showing. Groove according to the present invention is a schematic diagram showing a shape example led to annular. It is a schematic diagram which shows the tangent direction of the edge part surface of the cylindrical base | substrate which concerns on this invention. Is a schematic view showing an example of an electronic photograph sensitive optical member unit according to the present invention. FIG. 2 is a schematic diagram illustrating an example of the periphery of an electrophotographic photosensitive member unit in the electrophotographic apparatus according to the present invention. It is a schematic diagram which shows an example of the deposited film formation apparatus which concerns on this invention. The end face of the electronic photograph sensitive optical material is a schematic diagram showing an example of a mark is attached only paint. It is a schematic diagram showing an example of a packing case of the electronic photograph feeling light body. Examples of paint was deposited on the electron photograph feeling recess and the recess formed in the end face of the optical body according to the present invention is a schematic diagram showing. It is an example of a property measurement unit of the electronic photograph feeling light body.

The concave portion formed on the end surface of the cylindrical substrate used in the present invention is not particularly limited as long as it is a physically concave shape. However, to ensure the smooth portion of the coating material Ru is deposited over the recess, and it is more preferable groove is shape that is connected to the annular from the viewpoint of ensuring the adhesion of the paint. The term “annular” as used herein means a shape in which grooves are connected, as shown in FIGS. 5A, 5B, and 5C as an example.
Used in the circumferential direction of the specific position detecting system for an electronic photograph sensitive optical member used in the present invention is not particularly limited as light to be irradiated on the end face of the cylindrical substrate, the irradiation light in terms of measurement accuracy Since a smaller spot diameter is preferable, it is preferable to use laser light.

The paint Ru is adhered to the end face of the cylindrical substrate used in the present invention is attachable to an end face of the cylindrical body, limited particularly as long as visually perceivable color is Absent. However, as the material for the cylindrical substrate, a metal, particularly aluminum, is often used, and therefore, it is preferable to use a paint having a strong adhesion to aluminum. Further , from the viewpoint of the mark detection accuracy by the scattered light of the laser beam, the paint is applied as a mark on the end surface recess of the cylindrical substrate, and then the surface of the paint is made smooth. Therefore, a paint having a viscosity that can make the surface smooth is used.
In addition , the smooth shape referred to here satisfies 0.1 μm or less in arithmetic average roughness: Ra (JIS B 0601-1994, however, since the measurement object is small, the evaluation length is fixed to 0.3 mm). Means shape.

Next, place the respective electronic photograph feeling light body styrofoam packing case as shown in FIG. 11, according to the logistics test standard (JIS Z0232), was placed in vibration test equipment (EMIC CORP.Model 905-FN) .
In the present invention, from the viewpoint of the mark detection accuracy by laser light of the scattered light, Rukoto to adhere the paint also on the end face portions other than the concave portion of the cylindrical substrate is preferred. This is because the surface of the paint after adhering to the end surface of the cylindrical substrate can be made smoother.
From the same viewpoint, the paint adhering to the portion other than the recess, the length in the tangential direction of the open portion of the cylindrical substrate is preferably at 0.5mm or more. In addition , in terms of the accuracy of specifying the circumferential position by the mark, it is preferable that the length of the paint adhering to a portion other than the concave portion in the tangential direction is 2.0 mm or less.
The tangential direction of the end surface of the cylindrical substrate is the direction of the arrow shown in FIG.

Also, if in the present invention, from the viewpoint of the mark detection accuracy by laser light of the scattered light, the shape of the recess formed in the end face of the cylindrical body is a shaped form having grooves connected to the annular groove There parts adhering is and paint surrounded by a recess having a shape connected to the annular, it is preferred that the length in the tangential direction of the end face of the cylindrical body is 0.5mm or more.
Note that the length of the enclosed Mareta portion by the recess shape groove led to annular is a portion of C shown in FIG.

As the circumferential direction of the particular positioning system used in the present invention, from the viewpoint of the mark detection accuracy, it is preferable to measure the scattered light resulting from irradiation with a laser. FIG. 3 is a schematic diagram when the scattered light is monitored. The intensity of the scattered light 3005 of the light 3004 irradiated to the end surface 3003 from the laser light source 3002 is measured by the sensor 3006.
In the case of measuring the intensity of the scattered light 3005, since the change in the intensity of the scattered light is small when the irradiation light 3004 passes through the deposited film or minute scratch formed on the end surface, the mark Can be identified stably.

Also, the mark indicating the at least one circumferential direction of the home position of the flange to be used in an electronic photograph sensitive optical member unit is provided at least one of the present invention. Then, characterized in that the flange is assembled to the electronic photograph sensitive optical member so that the position relationship between the mark provided on the mark and the flange provided at an end surface of the electronic photograph feeling light body becomes a predetermined positional relationship It is said.
Figure 7 is an example of a schematic view of an electronic photograph sensitive optical member unit, the mark 7003 on the end face 7002 of the electronic photograph sensitive optical member 7001 showing the circumferential direction of the home position is formed. Further, the electronic photograph sensitive optical member 7001 flange 7004 is installed, the mark 7005 to the flange 7004 showing the circumferential direction of the home position is formed. Then, the flange 7004 is assembled in the electronic photograph sensitive optical member 7001 so that the position of the mark 7005 position and the flange 7004 of the mark 7003 of the end surface of the electronic photograph feeling light body are aligned.

Further, the electrophotographic apparatus of the present invention has a rotation mechanism of the electronic photograph sensitive optical member unit, the rotation mechanism has a circumferential specific position specifying member. Further, the electrophotographic apparatus of the present invention has a mechanism for detecting the circumferential direction of the specific position specifying member of the electronic photograph sensitive optical member unit. Further, when the electronic photograph sensitive optical member unit is installed in an electrophotographic apparatus, positional relationship predetermined position mark provided in the circumferential direction of the specific position specified member and the flange of the electronic photograph sensitive optical member unit It is characterized by a relationship.
8 (a) is an example of a schematic view showing a peripheral electronic photograph sensitive optical member unit in an electrophotographic apparatus, an electronic photograph sensitive optical member unit 8001 is fixed by fixing screws 8003 to the rotating shaft 8002. Further , a specific position specifying member 8004 in the circumferential direction is attached to the rotation shaft 8002, and the home position in the circumferential direction is passed by the specific position specifying member 8004 in the circumferential direction passing between the home position detection units 8005 in the circumferential direction . Is detected.

8 (b) is an example of a schematic view when viewed from the direction of D in Fig. 8 (a) a rotary shaft 8002 and the fixed screw 8003 and a flange 8006 which is assembled in the electronic photograph sensitive optical member unit. The fixing screw 8003 has a convex portion. A groove is formed in the rotating shaft 8002. Grooves E, F, and G are formed in the flange 8006. The groove F is formed at a predetermined position with respect to the mark 8007 of the flange 8006.
As shown in FIG. 8C, a convex groove is formed by the groove of the rotating shaft 8002 and the grooves E, F, and G of the flange 8006. As shown in FIG. 8 (d), a portion of the convex shape of the fixing screws 8003, electronic photographs sensitive optical member unit 8001 by fitting into the groove of the convex shape due to the rotation shaft 8002 and the flange 8006 described above to the rotary shaft 8002 Fixed. At this time, the fixing screw is attached so that the H direction in the convex portion of the fixing screw, the H direction of the groove formed in the rotating shaft 8002, and the groove F formed in the flange 8006 are aligned. As a result, the direction of H in the convex portion of the fixing screw, the mark of the flange 8006 8007, align mark 8009 of the end face 8008 of the electronic photograph feeling light body.
Further , the specific position specifying member 8004 in the circumferential direction in FIG. 8 is installed so as to have a predetermined positional relationship with the H direction of the convex groove formed on the rotating shaft 8002.
Set a result, as an electronic photograph feeling light body end face mark 8009 and the circumferential direction of the specific position specifying member 8004 of 8008 is always a predetermined positional relationship, electronic photographs sensitive optical member unit in an electrophotographic apparatus found is, it is possible to detect the circumferential direction of the home position of the electronic photograph feeling light body.

Figure 9 is subjected to produce the a-Si electronic photographs feeling light body shows schematically an example of a deposited film forming apparatus for performing an RF plasma CVD method using a 13.56MHz high-frequency power source .
This deposited film forming apparatus includes a reaction vessel 9000 and an exhaust device 9001 for depressurizing the inside of the reaction vessel 9000. In the reaction vessel 9000, an auxiliary substrate 9002 connected to the ground, a substrate heater 9004 for heating the cylindrical substrate 9003, and a gas introduction pipe 9005 are installed. Further , the side wall of the reaction vessel 9000 is constituted by a discharge electrode 9006 made of a conductive material, and the other portion of the discharge electrode 9006 and the reaction vessel 9000 is insulated by an insulator 9007. A high frequency power supply 9009 of 13.56 MHz is connected to the discharge electrode 9006 via a matching box 9008.
Each cylinder constituting source gas supply means (not shown) is connected to a gas introduction pipe 9005 in the reaction vessel 9000 via a source gas introduction valve 9010.
The reaction vessel 9000 has an exhaust pipe 9011 and is evacuated by an exhaust device 9001 through a vacuum gauge 9012 and a main valve 9013.

Hereinafter, using the apparatus of FIG. 9, an example of a manufacturing method of a-Si electronic photograph sensitive optical body will be described.
For example, a cylindrical substrate 9003 whose surface is mirror-finished using a lathe (not shown) is installed on the auxiliary substrate 9002 so as to surround the substrate heater 9004 in the reaction vessel 9000, and a cap 9014 is installed. .
Next, the main valve 9013 is opened to exhaust the reaction vessel 9000 and the gas introduction pipe 9005. When the reading of the vacuum gauge 9012 becomes 0.67 Pa or less, the source gas introduction valve 9010 is opened, and an inert gas for heating, for example, argon is introduced into the reaction vessel 9000 from the gas introduction tube 9005. Then, the flow rate of the inert gas for heating, the opening amount of the main valve 9010 or the exhaust speed of the exhaust device 9001 are adjusted so that the inside of the reaction vessel 9000 has a desired pressure. Thereafter, a temperature controller (not shown) is operated to heat the cylindrical substrate 9003 by the substrate heater 9004, and the temperature of the cylindrical substrate 9003 is controlled to a desired temperature of 50 ° C. to 500 ° C. When the cylindrical substrate 9003 is heated to a desired temperature, a predetermined raw material gas for film formation is gradually introduced into the reaction vessel 9000 while gradually stopping the inert gas. The source gas is, for example, a material gas such as SiH ₄ , Si ₂ H ₆ , CH ₄ , or C ₂ H ₆ , or a doping gas such as B ₂ H ₆ or PH ₃ , and is supplied by a mass flow controller (not shown). Is adjusted to a predetermined flow rate. At that time, the opening amount of the main valve 9013 or the exhaust speed of the exhaust device 9001 is adjusted while looking at the vacuum gauge 9012 so as to maintain the pressure in the reaction vessel 9000 at several tens Pa to several hundred Pa.

After completing the film formation preparation by the above procedure, a deposited film is formed on the surface of the cylindrical substrate 9003. After confirming that the pressure in the reaction vessel 9000 is stable, the high frequency power supply 9009 is set to a desired power, and the high frequency power is supplied to the discharge electrode 9006 to cause a high frequency glow discharge. At this time, the matching box 9008 is adjusted so that the reflected power is minimized, and the effective value obtained by subtracting the reflected power from the incident power of the high frequency power is set to a desired value. With this discharge energy, the source gas introduced into the reaction vessel 9000 is decomposed, and a predetermined deposited film is formed on the surface of the cylindrical substrate 9003. During film formation, the cylindrical substrate 9003 may be rotated around the central axis at a predetermined speed by a driving device (not shown). After the deposition film having a desired film thickness is formed, the supply of the high frequency power is stopped and the inflow of the raw material gas into the reaction vessel 9000 is stopped. A plurality of deposited films are sequentially formed by changing the conditions such as the source gas type and the high frequency power as required. Thereafter, the inside of the reaction vessel 9000 is once raised to a high vacuum, and then the deposited film forming step is finished. Making a-Si electronic photograph sensitive optical member by the above operation.

EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, this invention is not restrict | limited at all by these.
<Example 1>
Using the plasma processing apparatus shown in FIG. 9, the charge injection blocking layer, the first photoconductive layer, the second photoconductive layer, and the third light are formed on the cylindrical base (the surface of the cylindrical base) under the conditions shown in Table 1. A positively charged a-Si photosensitive member was produced by sequentially forming a conductive layer and a surface layer. A high frequency power source having a frequency in the RF band was used.
Incidentally, to produce an electronic photograph sense light of twenty in this example.
Grooves as shown in FIG. 4 to the end face of each of the electronic photograph feeling light body produced is a recess having a shape connected to the annular, forming a mark by attaching a coating material thereon. At this time, the length in the tangential direction of the end surface of the cylindrical base body, which is surrounded by the concave portion having a shape in which the grooves are connected in an annular shape and the paint adheres, is 1.3 mm to 1.8 mm in each drum. Met.

In this example, TAT stamp ink <special type> M-365 manufactured by Shachihata is used as a paint.
In each of the electronic photograph feeling light body produced, the laser beam 3004 as shown in FIG. 3 is irradiated on the end face 3003 of the electronic photograph feeling light body, rotates the electronic photograph feeling light body in the circumferential direction The intensity of the scattered light 3005 at that time was measured. Detecting the intensity position of the mark by determining the smaller becomes part than a predetermined value of the scattered light 3005 while electron photograph feeling light body is round, and the circumferential direction of the home position.

Incidentally, in each of the electronic photograph feeling light body, a mark erroneously detected if the mark is not detected, the rate at which the mark erroneous detection of the twenty generated are shown in Table 2.
Next, place the respective electronic photograph feeling light body styrofoam packing case as shown in FIG. 11, according to the logistics test standard (JIS Z0232), was placed in vibration test equipment (EMIC CORP.Model 905-FN) .
FIG. 11A is an overall appearance of the packaging case, and FIG. 11B is a schematic diagram showing the inside of the packaging case.
In each of the x, y, and z axis directions, a vibration test was performed at a frequency of 10 Hz to 100 Hz, an acceleration of 1 G, a sweep direction LIN SWEEP, a reciprocating sweep time of 5 minutes, and a test time of 1 hour. After completion of the vibration test, after the respective electronic photograph sensitive optical body taken out from the packing case, to confirm the presence or absence of the paint, shown in determined Table 3 the percentage of lost paint.

<Comparative Example 1>
In each of the electronic photograph feeling light body prepared in Example 1, the laser beam 2003 as shown in FIG. 2 was irradiated to the end face 2002 of the electronic photograph feeling light body, the circumference of the electronic photograph feeling light body The intensity of the direct reflected light 2004 at that time was measured. Detecting the position of the mark by determining the direct intensity of the reflected light 2004 becomes smaller than a predetermined value portion between the electronic photograph feeling light body is round, and the circumferential direction of the home position.
Incidentally, in each of the electronic photograph feeling light body, a mark erroneously detected if the mark is not detected, the rate at which the mark erroneous detection of the twenty generated are shown in Table 2.

<Comparative example 2>
In the same manner as in Example 1, to produce the electrophotographic photograph sense light of twenty, the end face of each of the electronic photograph feeling light body produced in the groove is annular, as shown in FIG. 5 (a) A mark was formed only by forming a concave portion having a connected shape. No paint was deposited on the recess. At this time, the lengths in the tangential direction of the end surface of the cylindrical base body were 1.3 mm to 1.8 mm, respectively, in the portion surrounded by the concave portion having a shape in which the grooves were connected in an annular shape .
In each of the electronic photograph feeling light body produced in the same manner as in Example 1, the laser beam 3004 as shown in FIG. 3 is irradiated on the end face 3003 of the electronic photograph feeling light body, electronic photographs feeling light body Was rotated in the circumferential direction, and the intensity of the scattered light 3005 at that time was measured. Detecting the intensity position of the mark by determining the smaller becomes part than a predetermined value of the scattered light 3005 while electron photograph feeling light body is round, and the circumferential direction of the home position.
Incidentally, in each of the electronic photograph feeling light body, a mark erroneously detected if the mark is not detected, the rate at which the mark erroneous detection of the twenty generated are shown in Table 2.

<Comparative Example 3>
Mark in the same manner as in Example 1, to produce the electrophotographic photograph sense light of twenty, the end face of each of the electronic photograph feeling light body manufactured depositing a coating as shown in FIG. 10 Formed. No recess was formed.
FIG. 10B is a cross-sectional view taken along line B in FIG.
Moreover , the length in the tangent direction of the edge part surface of a cylindrical base | substrate of the part which the coating material adhered was 1.3 mm-1.8 mm, respectively. The same paint as in Example 1 was used.
In each of the electronic photograph feeling light body produced to detect the position of the mark in the same manner as in Example 1, it was the circumferential direction of the home position.
Incidentally, in each of the electronic photograph feeling light body, a mark erroneously detected if the mark is not detected, the rate at which the mark erroneous detection of the twenty generated are shown in Table 2.
Next, a vibration test was performed in the same manner as in Example 1, the presence or absence of the paint after the vibration test was confirmed, and the ratio of the paint being lost was determined and shown in Table 3.
<Evaluation of Example 1 and Comparative Examples 1 to 3>

As shown in Table 2, in Example 1, it was possible to suppress the occurrence of false detections compared to Comparative Example 1, Comparative Example 2, and Comparative Example 3.
Furthermore, as shown in Table 3, in Example 1, it can be seen that the adhesion of the paint is improved as compared with Comparative Example 3.
That is, a recess on the end face of the electronic photograph feeling light body, and forms a mark indicating by attaching coating circumferential direction of the home position on the recess. Furthermore, to detect the marks by irradiating a laser on the end face of the electronic photograph sensitive optical member by the scattered light. Thus, it was possible to detect the circumferential direction of the home position of no false positives electronic photographs feeling light body. Furthermore, the adhesion of the paint could be improved.

<Example 2>
The end face of the twenty electronic photograph feeling light body prepared in Example 1 to form a mark in the pattern of the following (a) to (c). That mark attached to the electronic photograph feeling light body one is four formed. Further, each of the marks are provided in the arrangement shown in Figure 12 (a).
(B) As shown in FIG. 12 (b), a recess on the end face of the electronic photograph feeling light body, to form a mark by adhering paint concave portion.
As shown in (b) FIG. 12 (c), the a recess on the end face of the electronic photograph feeling light body, to form a mark by adhering paint to a portion other than the concave portion and the recess. The length of the tangential end faces of the electronic photograph feeling light body portion adhering paint other than the concave portion was 0.3 mm.
As shown in (c) FIG. 12 (d), the a recess on the end face of the electronic photograph feeling light body, to form a mark by adhering paint to a portion other than the concave portion and the recess. The length of the tangential end faces of the electronic photograph feeling light body portion adhering paint other than the concave portion was 0.5 mm.
The same paint as in Example 1 was used.

In each of the electronic photograph feeling light body manufactured it was detected position of the mark in the same manner as in Example 1.
In addition, in the mark installed in Example 1, and the mark installed in each of (a) to (c), the case where no mark was detected was regarded as mark misdetection. For each twenty electronic photographs feeling light body for 5 times mark detection, the rate at which the mark erroneous detection in all 100 times mark detection has occurred are shown in Table 4.
Here, if the mark misdetection rate is less than 3%, it is considered that the mark is detected if it is measured again.

As shown in Table 4, it was confirmed that all the examples had a practically no problem level. Furthermore, Example 1 and Example 2 (c) were able to suppress the mark misdetection most.
That is, a recess on the end face of the electronic photograph feeling light body, and by adhering paint on a portion other than the concave portion and the recess to form a mark, cylindrical portion paint outside the recess is attached Stable mark detection could be realized by setting the length in the tangential direction of the end surface of the substrate to 0.5 mm or more.

<Example 3>
To produce the electrophotographic photograph sensitive optical member in the same manner as in Example 1, a recess as shown in FIG. 5 (b) on the end face, thereby forming a mark by attaching a coating material thereon.
In the present embodiment, grooves of the portion is and the paint surrounded by a recess having a shape connected to the annular attached, the length in the tangential direction of the end face of the cylindrical substrate was 1.5 mm.
The same paint as in Example 1 was used.
Then, using an electron photograph sensitive optical material characteristic measurement means, as shown in FIG. 13 installed with an electronic photograph feeling light body mark, was measured charge characteristics. Electronic photograph sensitive optical material characteristic measurement means shown in Figure 13, the periphery of the electronic photograph feeling light body 13001, a charger 13002, image exposure means for irradiating imagewise exposure light 13003 (not shown), the potential Sensor 13004 and pre-exposure means 13005 are arranged. At the same time when measuring the charging characteristics, to detect the position of the mark by the method shown in FIG. 3, it was also measured circumferential direction of the home position information.

Next, assembling the flange to the charging property and the circumferential direction of the electronic photograph feeling light body that the home position information is measured, to produce an electronic photograph sensitive optical member unit. Note that FIG. 7 is a schematic diagram of an electronic photograph sensitive optical member unit produced in this example, as mark provided is aligned to mark the flange provided on the end face of the electronic photograph feeling light body flange is assembled to the electronic photograph feeling light body.
It was then placed in an electrophotographic apparatus electronic photograph sensitive optical member unit, as shown in FIG. Furthermore, stored thereon charging characteristics and the circumferential direction of the home position information preliminarily measured electronic photographs feeling light body in an electrophotographic apparatus.
Here, the charging characteristics of the electronic photograph sensitive optical member according to means charging characteristic distribution of the surface of the electronic photograph feeling light body.

Next, image formation was performed by controlling the exposure operation of the electrophotographic apparatus (hereinafter referred to as exposure control) based on the charging characteristics and circumferential home position information stored in the electrophotographic apparatus. As a result, an image having a good image quality with a uniform image density was obtained as compared with the case where exposure control was not performed.
Here, the term exposure control and, based on the stored charging characteristics in an electrophotographic apparatus, changing the exposure amount by the charging characteristics higher portion in the surface and the lower part of the electronic photograph feeling light body, electronic photographs feeling It means control to make the charging characteristics uniform in the light body plane.

4001: End surface 4002: Concave portion 4003: Paint adhesion portion

Claims (8)

An electrophotographic photosensitive member having a cylindrical substrate and a photoconductive layer formed on the cylindrical substrate,
Mark indicating the circumferential reference position of the electrophotographic photosensitive member, are made form the end face of the cylindrical substrate,
The mark
A recess,
A paint adhering to cover all of the recesses on the recesses;
It is a mark formed with
The shape of the recess is a shape in which the grooves are connected in an annular shape,
The arithmetic average roughness Ra of the surface of the mark (JIS B 0601-1994, evaluation length 0.3 mm) is an electrophotographic photoreceptor, characterized in der Rukoto below 0.1 [mu] m.   The electrophotographic photosensitive member according to claim 1, wherein the coating material is also attached to a portion other than the concave portion.   The electrophotographic photosensitive member according to claim 2, wherein a length in a tangential direction of the end surface of the paint adhering to a portion other than the concave portion is 0.5 mm or more. Before surrounded by Ki凹 portion, and a portion the coating is adhered, the length in the tangential direction, electrophotographic photosensitive member according to claim 3 is 0.5mm or more. The system for detecting a specific position in the circumferential direction of the electrophotographic photosensitive member according to any one of claims 1 to 4 , wherein the scattered light generated as a result of irradiating the end face with light is measured. A system for detecting a specific position in the circumferential direction of an electrophotographic photosensitive member that detects a position of a mark and detects a specific position in the circumferential direction. The system for detecting a specific position in the circumferential direction of the electrophotographic photosensitive member according to claim 5 , wherein the light irradiated on the end surface is a laser beam. In the electrophotographic photosensitive member unit in which at least one flange is attached to the electrophotographic photosensitive member according to any one of claims 1 to 4 ,
At least one mark is provided on at least one of the flanges, and the electrophotography is configured such that the positional relationship between the mark provided on the end surface and the mark provided on the flange is a predetermined positional relationship. An electrophotographic photoreceptor unit, wherein a flange is assembled to an end of the photoreceptor. An electrophotographic apparatus having the electrophotographic photosensitive member unit according to claim 7 .
The electrophotographic apparatus has a rotation mechanism of the electrophotographic photosensitive member unit,
The rotation mechanism has a circumferential specific position specifying member,
The electrophotographic apparatus has a mechanism for detecting a specific position specifying member in the circumferential direction,
When the electrophotographic photosensitive member unit is installed in the electrophotographic apparatus, the positional relationship between the specific position specifying member in the circumferential direction and the mark provided on the flange becomes a predetermined positional relationship. Photo equipment.

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