JP2003161722A - Photoreceptor-testing apparatus for electrophotography - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a photoreceptor-testing apparatus for electrophotography that can prevent a photoreceptor in a seamless belt shape from being deformed during measurement, and to prevent deforming in a photoreceptor due to hooking when a retention member is to be inserted into the photoreceptor. <P>SOLUTION: A both ends-retaining member for retaining the both ends of a photoreceptor comprises a reception side retention member 10a for receiving one end section that is first set in the photoreceptor, an insertion side retention member 10b for retaining the other end of the photoreceptor 1, and a shaft 11 and an inner surface retention member 12 for supporting them. One stepless inner surface retention member 12 is passed to the entire inner surface of the photoreceptor 1, and the both ends of the photoreceptor 1 are retained by the reception side retention member 10a and the insertion side retention member 10b. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic photoconductor inspecting apparatus used in an image forming apparatus such as a laser printer or a copying machine, which is particularly suitable for inspecting a flexible belt-shaped photoreceptor. Regarding

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
When measuring the characteristic values of the photoconductor, in the case of a rigid cylindrical substrate formed of Al or the like, there is a low possibility that deformation or destruction will occur even if it is rotated during the measurement. It is possible to measure the characteristic value as it is (for example, the photosensitive characteristic measuring device for the photosensitive drum disclosed in Japanese Patent Laid-Open No. 4-26852). However, the belt-shaped photoreceptor of a thin film of Ni or the like requires extremely careful handling. That is, it must be rotated during normal measurement, but the rotation causes deformation or destruction of the photoconductor, which may cause damage to the charging device around the photoconductor, light source for exposure, surface potential meter, light source for neutralization, etc. It is very difficult to measure the belt-like shape because it contacts and damages or damages the photoreceptor.

Therefore, when measuring the characteristic value of the belt-shaped photoreceptor, the characteristic value is measured by cutting it into a certain size and preparing a dedicated measuring device capable of measuring with the sample piece. Was. However, in this method, since the photoreceptor must be destroyed, it is not possible to perform evaluation for confirming the degree of deterioration in the actual machine,
In addition, since it has to be cut, the time required for measurement becomes long, which causes a problem of poor efficiency.

Therefore, even for the belt-shaped photosensitive member, A
There has been a demand for a photoconductor tester capable of measuring characteristic values without breaking like a rigid cylindrical substrate having l as a medium. Therefore, the applicant of the present application, while supporting the end portion of the electrophotographic photosensitive member as the DUT by a supporting member, a charging device, an exposure light source, a surface potential meter, a sample passing current detector, which are arranged in the periphery, A light source for static elimination and a rotation control device that rotationally drives the photoconductor of the DUT, depending on the rotation of the photoconductor, charging, exposure, surface potential measurement, sample passing current measurement,
An electrophotographic photoconductor testing apparatus for inspecting the electrical characteristics of a photoconductor according to a process of static elimination, which comprises a holding member that holds a portion other than an end portion of the photoconductor when measuring a belt-shaped photoconductor. A body test device was proposed.

As a result, it becomes possible to measure a belt-shaped substrate made of a thin film of Ni or the like. However, the receiving side holding member and the photoconductor inner surface holding member are joined to each other at the portion holding the inner surface of the photoconductor. Therefore, if there is no gap or step in the joint between the holding member on the receiving side and the holding member on the inner surface of the photoconductor, there is no particular problem in measurement, but unless the precision of the joint is very good, a gap or step will occur. It was the current situation. If there is a gap or a step, when the photoconductor is inserted into the inner surface holding member and set, the end of the belt-shaped photoconductor may hit the step and the photoconductor may be deformed or destroyed. The joining portion between the member and the holding member on the inner surface of the photoconductor must always be processed. In addition, since the joint between the holding member on the receiving side and the holding member on the inner surface of the photoconductor must have good precision, it must be handled carefully. Therefore, there has been a demand for a photoconductor tester for a thin film substrate of Ni or the like which solves these problems.

[0006]

In order to achieve the above-mentioned object, an electrophotographic photoreceptor testing apparatus according to claim 1 of the present invention comprises a charging device arranged around a photoreceptor which is an object to be tested,
An exposure light source, a surface electrometer, a sample passing current detector, a charge eliminating light source, and a rotation control means for rotationally driving the photoconductor,
A belt-shaped photoconductor in an electrophotographic photoconductor testing apparatus for inspecting the electrical characteristics of the photoconductor according to processes of charging, exposure, surface potential measurement, sample passing current measurement, and charge removal according to the rotation of the photoconductor. It is characterized in that it has means for holding the entire surface of the inner surface of the photosensitive member in the form of a belt by one holding member having no step when measuring.

According to a second aspect of the present invention, in order to achieve the above object, in the electrophotographic photoconductor test apparatus according to the first aspect, the holding member is a photoconductor inner surface used as a rigid photoconductor substrate. A first holding member for holding and a second holding member for holding the inner surface of the photoconductor used in the belt-shaped photoconductor, and the second holding member can be attached by covering the first holding member. It is characterized by

According to a third aspect of the present invention, in order to achieve the above object, in the electrophotographic photosensitive member testing apparatus according to the first or second aspect, the holding member is provided at a portion for receiving the photosensitive member end portion. It is characterized in that a tapered surface whose outer diameter increases from the side where the photoconductor is inserted to the front side in the insertion direction is formed.

According to a fourth aspect of the present invention, in order to achieve the above object, in the electrophotographic photoreceptor testing apparatus according to any one of the first to third aspects, the opposite side of the photoreceptor inserted into the holding member. It is characterized in that the holding member inserted into the end portion forms a tapered surface whose outer diameter increases in the direction opposite to the insertion side.

According to a fifth aspect of the present invention, in order to achieve the above object, in the electrophotographic photoreceptor testing apparatus according to any one of the first to fourth aspects, the holding member is provided on the inner surface side of the photoreceptor. It is characterized by comprising a shaft-shaped portion to be positioned and a pair of receiving portions for receiving the end portion of the photoconductor.

According to a sixth aspect of the present invention, in order to achieve the above object, in the electrophotographic photoreceptor testing apparatus according to any one of the first to fifth aspects, at least the inner surface of the photoreceptor is held by the holding member. The feature is that the part is hollow.

According to a seventh aspect of the present invention, in order to achieve the above object, in the electrophotographic photoreceptor testing device according to any one of the first to sixth aspects, the hardness h1 of the substrate of the photoreceptor is
And the hardness h2 of at least the surface of at least the portion of the holding member that comes into contact with the photoconductor with the inner surface of the photoconductor is h1 <h2.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments and examples of the present invention will be described below with reference to the drawings, but the present invention is not limited to the embodiments shown and described.

FIG. 1 is a conceptual diagram (A) showing an outline of an embodiment of an electrophotographic photosensitive member testing apparatus according to the present invention, showing both end holding members used when setting the photosensitive member in the apparatus and its operation. It is a conceptual diagram (B). The electrophotographic photoreceptor 1 of FIG. 1 rotates in the direction of the arrow in the figure, a high voltage power source is output from the voltage power source 7, and the corona charger 6 charges the photoreceptor. After that, the passing current in the photoconductor 1 is sent to the signal processing circuit 5a. A smoothing circuit (not shown) is incorporated in the signal processing circuit 5a, and the smoothing circuit smooths the passing current. After that, it is converted into a digital signal by the A / D converter 20 and sent to the controller 21, where the digital signal is processed.

Further, the surface potential of the electrophotographic photosensitive member 1 is sent from the surface potential probe 3 to the surface potential meter 4 which is a monitor section for monitoring and sent to the signal processing circuit 5b. Then A
Conversion by the D / D converter 20, and then the controller 21
Send to and process.

The post-exposure potential of the photoconductor 1 is measured by using the exposure device 2, and when removing the surface potential of the photoconductor 1, the static elimination light source 8 is used. Reference numeral 22 in FIG. 1 is a digital output circuit.

As mentioned above, FIG. 1B shows the first embodiment of the present invention.
It is a schematic diagram showing composition of a both-ends holding member concerning an embodiment. The both-end holding members that are positioned inside the photoconductor and hold both ends of the photoconductor include a receiving-side holding member 10a that receives one end of the photoconductor 1 that is initially set (left in FIG. 2) and other members. Insert-side holding member 1 that holds the end (right of FIG. 2)
0b, and a shaft 11 and an inner surface holding member 12 that support them.

To construct the both-end holding member, the insertion-side holding member 10b is removed from the shaft 11, the inner surface holding member 12 is inserted so as to cover the shaft 11, and the tip end side in the insertion direction is the receiving-side holding member. Then, the insertion side holding member 10b is attached to the shaft 11 at the other end side, the insertion side holding member 10b is fitted to the other end of the inner surface holding member 12, and thereby the inner surface holding member 12 is fixed.
In order to set the photoconductor 1 on the both end holding members 10, first, the insertion side holding member 10b is removed from the shaft 11, and the photoconductor 1 is inserted from one end side so as to cover the inner surface holding member 12 and then inserted. The tip side in the direction of the receiving side holding member 10a
To the insertion side holding member 10b at the other end of the photoconductor 1.
Is attached to the shaft 11, and the insertion side holding member 10b is fitted into the other end of the inner surface holding member 12 to fix the photoconductor 1. Then, the photoconductor 1 is rotated by the motor 9.

In the first embodiment of the electrophotographic photosensitive member testing apparatus of the present invention, as described above, one inner surface holding member 12 having no step is passed through the entire inner surface of the photosensitive member 1 to form the receiving side holding member 10a. Both ends of the photoconductor 1 are held by the insertion side holding members 10b.

<Example 1> The characteristic values of the photoconductor were measured by using a test apparatus manufactured by Ricoh Co., Ltd. having an apparatus configuration as shown in FIG. The photoconductor to be tested is a printer (model: IPSIO COLOR, manufactured by Ricoh Co., Ltd.).
5000) photoconductor (peripheral length: 290.3 mm≈92.
39 mm × π, width: 367 mm, wall thickness: 30 μm, substrate: Ni seamless belt). An inner surface holding member that holds the photoconductor from the inner surface during measurement (total length: 367 m
m, diameter 92.20 mm) was Al, and the surface of which was subjected to electroless nickel treatment was used. The material is A
Comparative Example 1 was the case of using an inner surface holding member (total length: 367 mm, diameter 92.20 mm) having no surface treatment. For each of Example 1 and Comparative Example 1 of the present invention, after measuring 100 photoconductors, the results of checking the conditions of the photoconductor, the inner surface holding member, and the apparatus are shown in Table 1.

[Table 1]

As can be seen from Table 1 above, in Comparative Example 1, since the inner surface holding member is made of a material (Al) whose hardness is lower than the hardness of the substrate of the photoconductor, when the photoconductor is inserted. The photoconductor and the inner surface holding member rub against each other, and the inner surface holding member is scraped off, which causes Al pieces to fall into the device, causing rattling in holding the photoconductor due to long-term use of the inner surface holding member and damage to the photoconductor. The possibility of. On the other hand, if an inner surface holding member made of a material (electroless Ni) having a hardness higher than that of the photoreceptor substrate is used on the surface as in Example 1 of the present invention, the inner surface holding member is mounted without damage. It becomes possible to measure, and the life of the inner surface holding member is extended. The same effect can be obtained by making the material of not only the surface but also the inner surface holding member itself higher than the hardness of the substrate of the photoconductor. Further, since the inner surface holding member does not have a step, when the inner surface holding member is inserted into the photoconductor, no one of 100 hooks on the surface of the inner surface holding member occurs, which may damage the photoconductor. I was able to measure without.

<Embodiment 2> The characteristic values of the photoconductor were measured by using a test device manufactured by Ricoh Co., Ltd. having a device configuration as shown in FIG. The photoconductor to be tested is a printer (model: IPSIO COLOR, manufactured by Ricoh Co., Ltd.).
5000) photoconductor (peripheral length: 290.3 mm≈92.
39 mm × π, width: 367 mm, wall thickness: 30 μm, substrate: Ni seamless belt). The inner surface holding member holds the entire inner surface of the photoconductor (total length 367 mm, diameter 9
2.20mm), the material is Al and the inside is hollow (thickness 10m)
m), the surface was treated with electroless nickel so that it could be removed from the device. On the other hand, the inner surface holding member having a non-hollow inside (total length 367 mm, diameter 92.33
mm, made of Al, whose surface was treated with electroless nickel) and which could not be removed from the apparatus was used as Comparative Example 2. The respective weights are shown in Table 2.

[Table 2]

As can be seen from Table 2, by making the inside of the inner surface holding member hollow, weight reduction is possible, the inner surface holding member can be rotated with a small force, and a large motor force is not required. Further, since the inner surface holding member can be detached from the apparatus, even if the inner diameter of the photoconductor is different, the inner surface holding member can be measured by exchanging only the inner surface holding member. Can be easily replaced.

<Embodiment 3> The characteristic values of the photoconductor were measured by using a test device manufactured by Ricoh Co., Ltd. having a device configuration as shown in FIG. The photoconductor to be tested is a printer (model: IPSIO COLOR, manufactured by Ricoh Co., Ltd.).
5000) photoconductor (peripheral length: 290.3 mm≈92.
39 mm × π, width: 367 mm, wall thickness: 30 μm, substrate: Ni seamless belt). The inner surface holding member is made of Al and has a hollow inside (total length 367 mm, diameter 9
2.20 mm, thickness 10 mm), the surface of which is subjected to electroless nickel treatment and is integrated with the receiving side holding member for receiving the photoconductor. On the other hand, Comparative Example 3 was a case in which a receiving side holding member and an inner surface holding member were separately used (total length 367 mm, diameter 92.20 mm, thickness 10 mm, made of Al, surface treated with electroless nickel). From the state where the device was set for the photoconductor with an inner diameter of 60 mm, change to the IPSIO COLOR manufactured by Ricoh Co., Ltd.
Table 3 shows the preparation time spent until measurement after changing to the 5000 photoconductor.

[Table 3]

As can be seen from Table 3, when the receiving side holding member and the inner surface holding member are integrated, the preparation time spent for the measurement becomes shorter. Also, by being integrated,
It was possible to prevent mounting mistakes and setting mistakes.

<Embodiment 4> The characteristic values of the photoconductor were measured by using a test device manufactured by Ricoh Co., Ltd. having a device configuration as shown in FIG. The photoconductor to be tested is a printer (model: IPSIO COLOR, manufactured by Ricoh Co., Ltd.).
5000) photoconductor (peripheral length: 290.3 mm≈92.
39 mm × π, width: 367 mm, wall thickness: 30 μm, substrate: Ni seamless belt). The inner surface holding member is made of Al and has a hollow inside (total length 367 mm, diameter 9
2.20 mm, thickness 10 mm), the surface of which is subjected to electroless nickel treatment and can be removed, so that the inner surface holding member used for the rigid photoconductor substrate made of Al or the like can be covered. Then, the inner surface holding member can be attached. That is, 12a in FIG.
Is an inner surface holding member used for a rigid photoconductor substrate (inner diameter 60 mm), and 12 is an inner surface holding member of the present embodiment. On the other hand, the inner surface holding member is integrated with the receiving side holding member and cannot be easily removed (total length: 367 mm,
Comparative Example 4 was measured with a diameter of 92.20 mm, a thickness of 10 mm, made of Al, and treated with electroless nickel on the surface).
From the state where the device was set for the photoconductor with an inner diameter of 60 mm, change to the IPSIO COL manufactured by Ricoh Co., Ltd.
Table 4 shows the result of comparison of the preparation time spent until measurement after changing to the photoconductor for OR5000.

[Table 4]

As can be seen from Table 4, in Example 4, Al
Since the inner surface holding member 12a used for the rigid photoconductor substrate formed by the above is simply covered with the inner surface holding member 12 for the belt, the holding member to be prepared is only the holding member for holding the inner surface of the photoconductor. Moreover, since the inner surface holding member can be easily removed, the measurement preparation time can be shortened and the measurement can be facilitated. In Comparative Example 4, all of the receiving-side holding member, the inner-side holding member, and the insertion-side holding member of the photoconductor are required to be replaced, so that the cost is high and the measurement preparation time is longer than that in Example 4. Hang up.

<Embodiment 5> The characteristic values of the photoconductor were measured by using a test device manufactured by Ricoh Co., Ltd. having a device configuration as shown in FIG. The photoconductor to be tested is a printer (model: IPSIO COLOR, manufactured by Ricoh Co., Ltd.).
5000) photoconductor (peripheral length: 290.3 mm≈92.
39 mm × π, width: 367 mm, wall thickness: 30 μm, substrate: Ni seamless belt). As shown in FIG. 3, the inner surface holding member is removable from the apparatus, the material is Al, and the inside is a cavity (total length 367 mm, diameter 92.20).
mm, thickness 10 mm), electroless nickel treatment is applied to the surface, and the taper surface 12b is provided on the back side (front side in the mounting direction of the photoconductor).
Was used. On the other hand, the inner surface holding member is not processed at all on the back side (length 367 m).
m, diameter 92.20 mm, thickness 10 mm, made of Al, treated with electroless nickel on the surface) was used as Comparative Example 5. Table 5 shows the damage status of the photoconductors when 100 photoconductors were measured. In the following description, the term “damage” refers to something that appears as an image defect when an image is output, such as deformation and scratches.

[Table 5]

As can be seen from Table 5, by forming a tapered surface on the inner side of the inner surface holding member, the photoconductor and the inner surface holding member can be brought into close contact with each other, and the photoconductor can be prevented from being damaged and can be measured. Becomes

<Embodiment 6> The characteristic values of the photoconductor were measured by using a test apparatus manufactured by Ricoh Co., Ltd. having a device configuration as shown in FIG. The photoconductor to be tested is a printer (model: IPSIO COLOR, manufactured by Ricoh Co., Ltd.).
5000) photoconductor (peripheral length: 290.3 mm≈92.
39 mm × π, width: 367 mm, wall thickness: 30 μm, substrate: Ni seamless belt). As shown in FIG. 4, the inner surface holding member is removable from the apparatus and holds the entire inner surface of the photosensitive member. The material is Al and the inner is hollow (total length 3
67 mm, diameter 92.20 mm, thickness 10 mm), the surface is subjected to electroless nickel treatment and a tapered surface is formed on the back side, and the outer diameter of the end portion 12c on the side where the photoconductor is inserted is the taper on the back side. A material having a diameter (80 mm) smaller than the outer diameter of the portion other than the surface was used. On the other hand, Comparative Example 6 was measured using a holding member (length 367 mm, diameter 92.20 mm, thickness 10 mm, made of Al, treated with electroless nickel on the surface) having only a tapered surface formed on the inner side. did. Table 6 shows the damage status of the photoconductors when 300 photoconductors were measured.

[Table 6]

As can be seen from Table 6, the outer diameter of the inner surface holding member on the side where the photoconductor is inserted is smaller than the outer shape of the inner surface holding member other than the tapered surface. Can be easily inserted into the inner surface holding member,
It has become possible to prevent damage to the photoreceptor and make measurements.

<Embodiment 7> The characteristic values of the photoconductor were measured by using a test device manufactured by Ricoh Co., Ltd. having a device configuration as shown in FIG. The photoconductor to be tested is a printer (model: IPSIO COLOR, manufactured by Ricoh Co., Ltd.).
5000) photoconductor (peripheral length: 290.3 mm≈92.
39 mm × π, width: 367 mm, wall thickness: 30 μm, substrate: Ni seamless belt). The inner surface holding member is removable from the apparatus and holds the entire inner surface of the photoconductor. The material is Al, and the inner side is hollow (total length 367 mm, diameter 9
2.20 mm, thickness 10 mm), the surface of which was subjected to electroless nickel treatment, and the insertion side holding member used was an Al material whose surface was subjected to electroless nickel treatment. On the other hand, a case where the surface of the insertion-side holding member was not treated and the Al material was left as is was made Comparative Example 7 (the same inner surface holding member was used). Table 7 shows the results of checking the states of the insertion side holding member and the apparatus after measuring 100 photoconductors.

[Table 7]

As can be seen from Table 7, if the material of the insertion side holding member is lower than the hardness of the photoconductor substrate,
When the insertion-side holding member is inserted into the photoconductor, the photoconductor and the insertion-side holding member rub against each other, so that the insertion-side holding member is scraped. As a result, the Al piece of the insertion side holding member falls into the device. In addition, the insertion-side holding member is used for a long period of time, causing rattling or the like in holding the photoconductor, which may cause damage to the photoconductor. However, if the surface of the insertion-side holding member is made of a material having a hardness higher than that of the photoconductor substrate, it is possible to measure the insertion-side holding member without damage, and the life of the insertion-side holding member is also increased. Extend. The same effect can be obtained by making not only the surface but also the material of all the insertion side holding members higher than the hardness of the photoconductor substrate.

<Embodiment 8> The characteristic values of the photoconductor were measured by using a test device manufactured by Ricoh Co., Ltd. having a device configuration as shown in FIG. The photoconductor to be tested is a printer (model: IPSIO COLOR, manufactured by Ricoh Co., Ltd.).
5000) photoconductor (peripheral length: 290.3 mm≈92.
39 mm × π, width: 367 mm, wall thickness: 30 μm, substrate: Ni seamless belt). The inner surface holding member is removable from the apparatus and holds the entire inner surface of the photoconductor. The material is Al, and the inner side is hollow (total length 367 mm, diameter 9
2.20 mm, thickness 10 mm), the surface of which is subjected to electroless nickel treatment and a taper surface is formed on the back side is used. Further, as shown in FIG. 5, the surface of the insertion side holding member 10b is electroless. A nickel treatment was used to form the tapered surface 10c. On the other hand, a comparative example 8a is a case in which an inner surface holding member having no tapered surface formed on the inner side and an insertion side holding member having a tapered surface only is used as Comparative Example 8a. Comparative Example 8b was a case where both the end portion and the inner surface holding member on the back side were not tapered surfaces. In both comparative examples, the conditions other than the above are the same as in Example 8. Photoconductor 30
Table 8 shows the state of damage to the photoreceptor when 0 pieces were measured.

[Table 8]

As can be seen from Table 8, by forming the end of the insertion side holding member into a tapered surface, the photoconductor and the insertion side holding member are in close contact with each other, so that damage to the photoconductor during measurement is prevented. I was able to. Further, if the inner surface holding member has a tapered surface and both ends have tapered surfaces, the photosensitive member and the holding member are in closer contact with each other, so that the photosensitive member can be further prevented from being damaged during measurement.

<Example 9> The characteristic values of the photoconductor were measured by using a test device manufactured by Ricoh Co., Ltd. having a device configuration as shown in FIG. The photoconductor to be tested is a printer (model: IPSIO COLOR, manufactured by Ricoh Co., Ltd.).
5000) photoconductor (peripheral length: 290.3 mm≈92.
39 mm × π, width: 367 mm, wall thickness: 30 μm, substrate: Ni seamless belt). The inner surface holding member is removable from the apparatus and holds the entire inner surface of the photoconductor. The material is Al, and the inner side is hollow (total length 367 mm, diameter 9
2.20 mm, thickness 10 mm), the surface of which is subjected to electroless nickel treatment and the back side of which has a tapered surface is used.
Further, the insertion side holding member used had a surface which was subjected to electroless nickel treatment to form a tapered surface. Table 9 shows the damage status of the photoconductor substrate when 100 outer diameters of the holding members were changed and the outer diameter of the holding member was changed.

[Table 9]

As can be seen from Table 9, the relationship d2 (mm) between the inner diameter d1 (mm) of the photoconductor substrate and the outer diameter of the holding member is
Since d1> d2 ≧ d1-1, it may contact the charging device, the exposure light source, the surface potential meter, the static elimination light source, etc., which are arranged around the photoconductor during the measurement, or the photoconductor base may be damaged by the deformation. I was able to prevent giving.

[0038]

As described above, the electrophotographic photosensitive member testing apparatus according to the first aspect of the present invention, when measuring a seamless belt-shaped photosensitive member of a thin film of Ni or the like, forms a step on the entire inner surface of the photosensitive member. Since it is configured to hold and measure with one seamless holding member, it is possible to prevent the seamless belt-shaped photoconductor from being deformed during measurement. Also, since it is held by one holding member, the inner surface of the photoconductor Since there is no step or gap in the inner surface holding member for holding the photosensitive member, it is possible to prevent deformation of the photosensitive member due to being caught when the photosensitive member is inserted into the holding member.

As described above, the electrophotographic photoconductor testing apparatus according to the second aspect of the present invention holds the photoconductor inner surface used for the rigid photoconductor substrate made of Al or the like.
In addition to the above-described common effects, the measurement preparation time can be shortened and the seamless belt can be easily formed because the second holding member used to hold the inner surface of the photoconductor with the belt-shaped photoconductor is attached to the holding member of FIG. It is possible to obtain the effect that it is possible to measure the photoconductor having the shape of a circle.

As described above, the electrophotographic photosensitive member testing apparatus according to the third aspect of the invention is such that, as described above, the portion of the holding member at which the photosensitive member is inserted is exposed from the side where the photosensitive member is inserted toward the front side in the insertion direction. In addition to the common effects described above, since the tapered surface with the increasing diameter is formed, it is possible to prevent deformation and destruction of the photoconductor by closely contacting the photoconductor and the holding member that holds the inner surface of the photoconductor. You can get the effect.

As described above, in the electrophotographic photosensitive member testing apparatus according to the fourth aspect, the holding member that is inserted into the opposite end portion of the photosensitive member that is inserted into the holding member faces the direction opposite to the insertion side. In addition to the common effects described above, the taper surface with an increasing outer diameter is formed, so that it is possible to improve the adhesion of the edges of the photoconductor and prevent deformation or destruction of the photoconductor. .

As described above, in the electrophotographic photosensitive member testing apparatus according to the fifth aspect of the present invention, the holding member has a pair of shaft-shaped portions positioned on the inner surface side of the photosensitive member and a pair of end portions of the photosensitive member. In addition to the common effects described above, the shaft-shaped part can be easily attached to and detached from the receiving part, so that the shaft-shaped part that holds the inner surface of the photoconductor can be replaced with a photoconductor having a different inner diameter. Therefore, it is possible to reduce the cost for configuring the device and shorten the preparation time spent until the measurement.

As described above, in the electrophotographic photosensitive member testing apparatus according to the sixth aspect, since the portion of the holding member that holds the inner surface of the photosensitive member is hollow, in addition to the above-mentioned common effects, The weight of the holding member can be reduced, and the replacement work can be facilitated.

As described above, in the electrophotographic photoreceptor testing device according to the seventh aspect, the hardness h1 of the photoreceptor substrate is h1.
And the hardness h of at least the surface of at least the portion of the holding member that comes into contact with the photoreceptor with the inner surface of the photoreceptor.
Since the relationship of 2 is h1 <h2, it is possible to prevent the holding member from being scraped due to contact with the photoconductor.

[Brief description of drawings]

FIG. 1 is a conceptual diagram (A) showing an outline of one embodiment of an electrophotographic photosensitive member testing apparatus according to the present invention, a conceptual diagram showing both-end holding members used when the photosensitive member is set in the apparatus and its operation ( B).

FIG. 2 is a conceptual diagram showing the outline of Example 4 of the electrophotographic photosensitive member testing apparatus according to the present invention.

FIG. 3 is a conceptual diagram showing the outline of Example 5 of the electrophotographic photosensitive member testing apparatus according to the present invention.

FIG. 4 is a conceptual diagram showing an outline of Example 6 of the electrophotographic photosensitive member testing apparatus according to the present invention.

FIG. 5 is a conceptual diagram showing the outline of Example 8 of the electrophotographic photosensitive member testing apparatus according to the present invention.

[Explanation of symbols]

1 Electrophotographic photoconductor 2 exposure equipment 3 Surface potential probe 4 surface electrometer 5a, 5b Signal processing circuit 6 Corona charger 7 voltage power supply 8 Light source for static elimination 9 motors 10a Receiving side holding member 10b Insertion side holding member 10c Tapered surface 11 shaft 12, 12a Inner surface holding member 12b taper surface

Claims (7)

[Claims] 1. A charging device, a light source for exposure, a surface potential meter, a sample passing current detector, a light source for static elimination, and a rotation control means for rotating and driving the photoconductor. A belt-shaped photosensitive member in an electrophotographic photosensitive member testing apparatus for inspecting the electrical characteristics of the photosensitive member according to the processes of charging, exposure, surface potential measurement, sample passing current measurement, and charge removal according to the rotation of the photosensitive member. An electrophotographic photoconductor testing apparatus, comprising means for holding the entire surface of the belt-shaped photoconductor inner surface by one holding member having no step when measuring the body. 2. The electrophotographic photoconductor test apparatus according to claim 1, wherein the holding member is used as a belt-shaped photoconductor and a first holding member for holding the inner surface of the photoconductor used for a rigid photoconductor substrate. And a second holding member for holding the inner surface of the photoconductor, and the second holding member can be attached by covering the first holding member. 3. The electrophotographic photoconductor testing apparatus according to claim 1, wherein the holding member has a portion that receives the end portion of the photoconductor and extends outward from a side where the photoconductor is inserted toward a front side in an insertion direction. An electrophotographic photoreceptor testing apparatus, characterized in that a tapered surface having an increasing diameter is formed. 4. The electrophotographic photosensitive member testing apparatus according to claim 1, wherein the holding member inserted into the opposite end of the photosensitive member to be inserted into the holding member is in the opposite direction to the insertion side. An electrophotographic photoreceptor testing apparatus, characterized in that a tapered surface whose outer diameter increases toward the outside is formed. 5. The electrophotographic photosensitive member testing apparatus according to claim 1, wherein the holding member receives a shaft-shaped portion positioned on the inner surface side of the photosensitive member and an end portion of the photosensitive member. An electrophotographic photoconductor testing apparatus comprising a pair of receiving portions. 6. The electrophotographic photoreceptor testing device according to claim 1, wherein at least a portion of the holding member that holds the inner surface of the photoreceptor is hollow. Test equipment. 7. The electrophotographic photoreceptor testing apparatus according to claim 1, wherein the hardness h of the substrate of the photoreceptor is h.
1 and the hardness h2 of at least the surface of at least the portion of the holding member that comes into contact with the photoreceptor with the inner surface of the photoreceptor, the relationship of h1 <h2 is satisfied. Photoconductor tester.