JP2007155993A - Method for accelerated testing of degradation in electrophotographic photoreceptor and accelerated testing machine for degradation in electrophotographic photoreceptor - Google Patents

Method for accelerated testing of degradation in electrophotographic photoreceptor and accelerated testing machine for degradation in electrophotographic photoreceptor Download PDF

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JP2007155993A
JP2007155993A JP2005349254A JP2005349254A JP2007155993A JP 2007155993 A JP2007155993 A JP 2007155993A JP 2005349254 A JP2005349254 A JP 2005349254A JP 2005349254 A JP2005349254 A JP 2005349254A JP 2007155993 A JP2007155993 A JP 2007155993A
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deterioration
charging
test
photosensitive member
electrophotographic photoreceptor
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Noriyasu Saito
紀保 齋藤
Kiyoshi Masuda
潔 増田
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Ricoh Co Ltd
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Ricoh Co Ltd
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<P>PROBLEM TO BE SOLVED: To provide a method for accelerated degradation testing for suppressing charging irregularity over a degraded region of an electrophotographic photoreceptor in a testing method on an electrophotographic photoreceptor. <P>SOLUTION: A charging step is carried out by a charging device 11 that applies a high voltage through a plurality of wires which are stretched in one direction and the faces of which parallel to the photoreceptor surface are not cased. Otherwise, the charging step and an exposure step are simultaneously carried out and the charging device 11 is continuously reciprocally moved in the same direction as the direction of the stretched wires or continuously and reciprocally moved in an approximately horizontal and different direction from the above direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、レーザープリンタ、複写機等の画像形成装置に使用される電子写真用感光体劣化加速試験方法及び電子写真用感光体劣化加速試験機に関し、特に誘電体薄膜の非接触、非破壊の劣化試験等に応用可能な感光体への帯電装置の改善に関するものである。   The present invention relates to an electrophotographic photoreceptor deterioration acceleration test method and an electrophotographic photoreceptor deterioration acceleration test machine used in an image forming apparatus such as a laser printer and a copying machine, and more particularly, non-contact and non-destructive of a dielectric thin film. The present invention relates to improvement of a charging device for a photoconductor that can be applied to a deterioration test or the like.

従来、例えば特許文献1に記載された感光体の評価方法が知られている。同文献には、既知数の像形成サイクルのサイクル操作寿命を有する少なくとも1つの電子写真像形成部材を用意し、静電気帯電工程と光放電工程を含むサイクルに繰り返しかけてサイクル中の上記電子写真像形成部材中の光導電性層の暗減衰量が最高値に達するまで測定し、上記最高値により暗減衰最高値対像形成サイクルの参照データを確立し、新鮮な電子写真像形成部材を静電気帯電工程と光放電工程を含む上記サイクルに、さらにサイクル操作にかけても実質的に一定のままである最高値に暗減衰量が達するまで繰り返しかけ、上記新鮮な電子写真像形成部材の暗減衰最高値を上記参照データと比較して上記新鮮な電子写真像形成部材の推定サイクル寿命を確認する各工程を含む電子写真像形成部材の推定像形成サイクル寿命の確認方法が開示されている。   Conventionally, for example, a method for evaluating a photoreceptor described in Patent Document 1 is known. In the same document, at least one electrophotographic image forming member having a known number of image forming cycles in the cycle operation life is prepared, and the above-described electrophotographic image in the cycle is repeatedly subjected to a cycle including an electrostatic charging step and a photodischarge step. Measure until the dark decay amount of the photoconductive layer in the forming member reaches the maximum value, establish the reference data of the dark decay maximum value vs. image forming cycle with the above maximum value, and charge the fresh electrophotographic imaging member electrostatically The above cycle including the process and the photodischarge process is repeated until the dark attenuation reaches the maximum value that remains substantially constant over the cycle operation, and the maximum dark attenuation value of the fresh electrophotographic image forming member is obtained. How to confirm the estimated image formation cycle life of the electrophotographic image forming member including each step of confirming the estimated cycle life of the fresh electrophotographic image forming member compared with the reference data There has been disclosed.

しかしながら、上記方法では、透明ガラスを圧着させてバイアス印加を行うとともに光を照射させており、コロナ帯電、ローラ帯電という実際の電子写真プロセスとは異なる方法での劣化加速試験法といえる。また、寿命に到ったサンプルの暗減衰特性があらかじめ分かっていないといけないため、一度感光体を実機に搭載して通紙試験を行う必要があり、多大な手間がかかってしまうという問題があった。   However, in the above method, transparent glass is pressed and bias is applied and light is irradiated, which can be said to be a deterioration acceleration test method different from the actual electrophotographic process of corona charging and roller charging. In addition, since the dark decay characteristics of samples that have reached the end of their life must be known in advance, it is necessary to mount a photoconductor on the actual machine once and perform a paper passing test, which is troublesome. It was.

その他の従来技術として、通紙試験を行わないで寿命を確認する方法が知られている。当該方法は、電子写真用感光体(以下、感光体と略す)を高速(1,000〜2,000r.p.m)で回転させた状態で感光体の周囲に配置された帯電器、露光装置で帯電、露光を繰り返してその寿命を予測する方法である。当該方法はさらに2つの試験方法に分かれる。1つ目は、帯電器の出力と露光装置の光量をあらかじめ決めて固定し、決められた時間だけ試験を行い、その後感光体の特性を測定し、劣化状態を判定する。2つ目は、試験中の感光体の露光後、電位Vと感光体を通して流れる通過電流Iを計測し、この2つが常に決められたレベルにあるように帯電器の出力と露光装置の光量を調整しながら行う方法である。   As another conventional technique, a method for checking the life without performing a paper passing test is known. In this method, the electrophotographic photoreceptor (hereinafter abbreviated as “photoreceptor”) is rotated at a high speed (1,000 to 2,000 rpm), and charging and exposure are repeated with a charger and an exposure device disposed around the photoreceptor. This is a method for predicting the service life. The method is further divided into two test methods. First, the output of the charger and the light quantity of the exposure device are determined and fixed in advance, the test is performed for a predetermined time, and then the characteristics of the photoconductor are measured to determine the deterioration state. Second, after the exposure of the photoconductor under test, the potential V and the passing current I flowing through the photoconductor are measured, and the output of the charger and the amount of light of the exposure device are adjusted so that these two are always at a predetermined level. This is a method performed while adjusting.

上記の2つの方法で重要な点は、試験中に感光体に流れた通過電流を計測し、これを単位面積当りの電荷量Qに変換し、一方、A4サイズ1枚を実機でプリントアウトする時、感光体を流れる通過電流が感光体の単位面積当りの静電容量をC、帯電電位V、感光体のサイズはA4紙1枚が感光体上をダブリなく印字されるサイズとすると、C・Vで求まることから、比Q/(C・V)は、寿命試験時間を実機のプリント枚数に対応させることができる点である。また、もう1つ重要な点はこの試験が加速寿命試験になっていることである。   The important point in the above two methods is that the current passing through the photoconductor during the test is measured and converted into the charge amount Q per unit area, while one A4 size sheet is printed out with the actual machine. When the passing current flowing through the photosensitive member is C, the electrostatic capacity per unit area of the photosensitive member is C, the charging potential is V, and the size of the photosensitive member is a size on which one A4 sheet can be printed on the photosensitive member without duplication. Since it is obtained by V, the ratio Q / (C · V) is that the life test time can correspond to the number of printed sheets of the actual machine. Another important point is that this test is an accelerated life test.

具体的に示すと、感光体に5μA/10cm2の試料通過電流を流し20Hr試験すると(1日1
0時間の試験とすると2日間)、(5/10)×10-6×20×60×60=0.036(C/cm2)の電
荷が感光体を通過したことになる(感光体を通過した電荷量を、以下通過電荷量と呼ぶ)。そして、A4用紙を縦送りで印字する場合を想定すると、感光体の静電容量Qを100(pF/cm2)とし、帯電電位を-700(V)とし、除電後も含めた露光後電位を0(V)とすると、100×10-12×700=7×10-8(C/cm2)がA4版の用紙1枚をプリントアウトする時の通
過電荷量であるので、比Q/(C・V)を求めると、0.036/(7×10-8)≒514,000枚のA4版用紙をプリントアウトしたことになり、大幅な加速試験を実施したのと同等になる。
Specifically, when a sample current of 5 μA / 10 cm 2 is passed through the photoreceptor and tested for 20 hours (1 per day)
(5/10) × 10 −6 × 20 × 60 × 60 = 0.036 (C / cm 2 ) of charge passed through the photoconductor (0 day test was 2 days). The amount of charge is hereinafter referred to as the passing charge amount). Assuming that A4 paper is printed with vertical feeding, the electrostatic capacity Q of the photoconductor is 100 (pF / cm 2 ), the charging potential is -700 (V), and the post-exposure potential including after static elimination. Is 0 (V), 100 × 10 −12 × 700 = 7 × 10 −8 (C / cm 2 ) is the passing charge amount when printing out one A4 size sheet, so the ratio Q / When (CV) is calculated, 0.036 / (7 × 10 −8 ) ≈514,000 A4 size paper is printed out, which is equivalent to a large acceleration test.

このため、上述した2つ目の方法を用いて寿命試験が行われることが多いが、前述の具体的な計算で分かるように、試験中に感光体を通過する電流が一定であれば、プリントアウト何枚相当の試験を行ったのか、計算がしやすいことになる。そのため、試験は通過電流を一定にするようにして実施することが一般的に行われているが、その本質は通過電荷量を知る(検知あるいは算出する)ことにある。また、感光体によっては帯電電位がどのレベルにあるかによって寿命試験の結果が異なることがあり、帯電電位も一定にして試験を行うことが要求される。このように、帯電電位及び通過電流を一定にするために、帯電器の高圧電源出力調整、及び露光装置の光量調整を行う装置あるいはシステムが必要であり、例えば特許文献2のような従来の寿命試験装置が構築されていた。   For this reason, a life test is often performed using the second method described above, but as can be seen from the specific calculation described above, if the current passing through the photoconductor is constant during the test, the print is printed. It will be easy to calculate how many out-tests have been done. For this reason, the test is generally performed with the passing current constant, but the essence is to know (detect or calculate) the passing charge amount. Also, depending on the level of the charged potential depending on the photoreceptor, the result of the life test may differ, and it is required to perform the test with the charged potential kept constant. Thus, in order to make the charging potential and the passing current constant, an apparatus or system for adjusting the high-voltage power supply output of the charger and adjusting the light amount of the exposure apparatus is required. Test equipment was built.

この従来の劣化加速試験は、図2に示すような、感光体試料片の特性評価装置によって劣化を加速する方法が知られている。上記の特性評価装置での劣化加速試験方法では、ターンテーブル1には感光体試料片を装着する開口部3が設けられており、開口部3の面積として、例えば19.36cm2(開口部:44×44mm)程度である。さらに、ターンテーブル1に付属して導電性金属板からなる試料片押さえ板2が設けられている。 In this conventional deterioration acceleration test, a method of accelerating deterioration using a characteristic evaluation device for a photoreceptor sample piece as shown in FIG. 2 is known. In the deterioration acceleration test method in the above characteristic evaluation apparatus, the turntable 1 is provided with the opening 3 for mounting the photoconductor sample piece. The area of the opening 3 is, for example, 19.36 cm 2 (opening: 44 × 44mm). Further, a sample piece pressing plate 2 made of a conductive metal plate is attached to the turntable 1.

当該装置では、約1,100r.p.mの回転速度で感光体の周囲に配置された帯電器4と露光装置5により帯電・露光を繰り返し、また、高速回転させながら試料片をコロナ帯電器4に何度も通過させることが可能な構成となっている。さらに、コロナ帯電器4から試料片に与えられ試料片を充電するパルス電流は、所定の検出間隔で電流計6に送られその中の平滑化回路で平滑化された後、A/D変換器8で変換されコントローラ9に送られ演算処理される。   In this apparatus, charging / exposure is repeated by the charger 4 and the exposure device 5 arranged around the photosensitive member at a rotation speed of about 1,100 rpm, and the sample piece is repeatedly applied to the corona charger 4 while rotating at high speed. It has a configuration that can be passed. Further, a pulse current applied to the sample piece from the corona charger 4 and charged to the sample piece is sent to the ammeter 6 at a predetermined detection interval and smoothed by a smoothing circuit therein, and then the A / D converter. 8 is converted and sent to the controller 9 for arithmetic processing.

また、試料片の表面電位は、コロナ帯電器4と別の位置に配置された表面電位計7のモニタ部である表面電位計電極5でモニタされ、モニタされた信号は所定の検出間隔で表面電位計7に送られ、その中の増幅器で増幅等がされた後、A/D変換器8で変換され、コントローラ9に送られ演算処理される。   Further, the surface potential of the sample piece is monitored by a surface potential meter electrode 5 which is a monitor unit of the surface potential meter 7 arranged at a position different from the corona charger 4, and the monitored signal is detected at a predetermined detection interval. After being sent to the electrometer 7 and amplified by an amplifier therein, it is converted by the A / D converter 8 and sent to the controller 9 for arithmetic processing.

しかしながら、このような従来のシステムでは、2つの測定量、表面電位Xと通過電流Y、及び、2つの操作量、帯電器高圧電源の出力制御値Aと除電露光ランプ光量の出力制御値Bとの関係は以下のようになっている。すなわち、Aを増加するとX,Yの両方が増加し、Aを減少させるとX,Yの両方ともに減少し、また、Bを増加するとXは減少するのに対しYは増加し、Bを減少するとXは増加するのに対しYは減少するという関係があり、仮にXが目標値からはずれ、これを目標範囲に入れようとAまたはBを操作すると、もう1方の測定量Yが変化してしまい、Yにとっては外乱が作用することになる。これを目標範囲に維持しようとAあるいはBを操作すると今度はXが変化するという状態になってしまい、複雑な制御を繰り返さねばならなかった。また、劣化加速試験中に感光体表面電位、通過電流の瞬間的なバラツキがあった場合でも、それらが瞬間的な誤差として通過電荷量算出に反映されないような測定システムとなっており、正確な劣化加速試験を行う上でさらなる改善の必要性があった。   However, in such a conventional system, two measurement quantities, the surface potential X and the passing current Y, and two manipulated variables, an output control value A of the charger high-voltage power supply, and an output control value B of the static elimination exposure lamp light amount, The relationship is as follows. That is, increasing A increases both X and Y, decreasing A decreases both X and Y, and increasing B decreases X while Y increases and B decreases Then, there is a relationship that X increases while Y decreases, and if X deviates from the target value and if A or B is operated to put this in the target range, the other measured quantity Y changes. Therefore, a disturbance acts on Y. If A or B is operated to maintain this within the target range, X will change this time, and complicated control must be repeated. In addition, even if there are momentary variations in the photoreceptor surface potential and passing current during the deterioration acceleration test, the measurement system is such that these are not reflected in the calculation of the passing charge amount as an instantaneous error. There was a need for further improvement in the accelerated deterioration test.

これらの上記問題点を解決するために、感光体の電位を一定条件に保つように制御し、試験中計測された通過電流から通過電荷量を算出できるシステムあるいは装置を、単純に操作でき、しかも精度の良い結果が得られるものとしようとすることが考えられる。   In order to solve these problems, a system or apparatus that can control the potential of the photoconductor to be kept at a constant condition and calculate the amount of passing charge from the passing current measured during the test can be simply operated. It can be considered that an accurate result is obtained.

しかし、最近の感光体は従来品と比べると群を抜いて高寿命化されてきており、このような劣化加速試験装置においても、寿命を知るまで試験を行うには、多大な時間を必要とする。   However, recent photoconductors have a long service life compared to conventional products, and even in such a deterioration acceleration test apparatus, it takes a lot of time to perform a test until the life is known. To do.

そこで、さらに劣化速度を加速した、短時間で寿命を判断可能な劣化加速試験方法が要望されている。例えば、特許文献3では、高電圧が印加される複数のワイヤを有し、このワイヤが1方向のみに張架され、かつワイヤを囲むケーシングの形状は感光体面に対して平行な面は全てケーシングされていない帯電装置によって、単位面積あたりの感光体面への電流量を増加させ、単位面積あたりの通過電荷量を増大させて試験する方法が採用されている。   Therefore, there is a demand for a deterioration acceleration test method that can further accelerate the deterioration rate and can determine the life in a short time. For example, in Patent Document 3, a plurality of wires to which a high voltage is applied are provided, the wires are stretched in only one direction, and the shape of the casing that surrounds the wires is the casing parallel to the surface of the photoreceptor. A method of testing by increasing the amount of electric current to the surface of the photoreceptor per unit area and increasing the amount of passing charge per unit area by a charging device that is not used is employed.

しかし、この劣化加速試験では、ワイヤの劣化等によるワイヤ張架方向の帯電ムラが発生することがあり、劣化領域全体にわたり帯電ムラを抑制した劣化加速試験方法が要望されていた。
特許第3204327号公報 特開2002−149005号公報 特開2005−99111号公報
However, this deterioration acceleration test may cause uneven charging in the wire stretching direction due to wire deterioration or the like, and there has been a demand for an accelerated deterioration test method in which charging unevenness is suppressed over the entire deterioration region.
Japanese Patent No. 3204327 JP 2002-149005 A JP-A-2005-99111

本発明は、上述した実情を考慮してなされたもので、電子写真用感光体の劣化加速試験方法において、電子写真用感光体の劣化領域全体に渡り帯電ムラを抑制する劣化加速試験方法を提供することを目的とする。   The present invention has been made in consideration of the above-described circumstances, and provides a deterioration acceleration test method that suppresses uneven charging over the entire deterioration region of the electrophotographic photoreceptor in the electrophotographic photoreceptor deterioration acceleration test method. The purpose is to do.

本願発明の発明者は、上記課題に鑑み鋭意検討した結果、電子写真用感光体をワイヤ張架方向に対して垂直方向に往復移動させるだけでなく、ワイヤ張架方向に帯電装置を常に移動させることで、電子写真用感光体の劣化領域全体の帯電ムラを抑制させ、複雑な動作や構造も必要ない劣化加速試験方法を完成するに至った。   The inventors of the present invention have made extensive studies in view of the above problems, and as a result, not only reciprocally moved the electrophotographic photoreceptor in the direction perpendicular to the wire stretching direction but also constantly moved the charging device in the wire stretching direction. As a result, the charging unevenness of the entire degradation region of the electrophotographic photoreceptor is suppressed, and a degradation acceleration test method that does not require complicated operation and structure has been completed.

上記の課題を解決するために、請求項1に記載の発明は、感光体を帯電する帯電工程と露光工程とを含むサイクルを繰り返して感光体の劣化を加速させ、画像形成装置の前記感光体の全通過電荷量に対し、前記全通過電荷量値の通過電流値を変えて流して前記電子写真用感光体の劣化を予測する電子写真用感光体劣化加速試験方法において、前記帯電工程は、1方向に張架され前記感光体面に対して平行な面は全てケーシングされていない複数のワイヤにより高電圧を印加する帯電装置によって行う工程であり、前記帯電工程と前記露光工程とを同時に行い、前記ワイヤが張架されている方向に対して同一方向に連続して往復稼動又は略水平でかつ異なる方向に連続して往復稼動することを特徴とする。   In order to solve the above-mentioned problems, the invention according to claim 1 accelerates deterioration of the photoconductor by repeating a cycle including a charging step for charging the photoconductor and an exposure step, and the photoconductor of the image forming apparatus. In the electrophotographic photosensitive member deterioration acceleration test method for predicting the deterioration of the electrophotographic photosensitive member by changing the passing current value of the total passing charge amount value with respect to the total passing charge amount, the charging step includes: A surface stretched in one direction and parallel to the surface of the photosensitive member is a step performed by a charging device that applies a high voltage by a plurality of wires that are not casing, and the charging step and the exposure step are performed simultaneously, It is characterized in that it reciprocates continuously in the same direction with respect to the direction in which the wire is stretched, or reciprocates continuously in a substantially horizontal and different direction.

また、請求項2に記載の発明は、請求項1記載の電子写真用感光体劣化加速試験方法において、前記帯電装置が前記ワイヤ張架方向と同一方向に連続往復稼動することを特徴とする。   According to a second aspect of the present invention, in the electrophotographic photoreceptor deterioration acceleration test method according to the first aspect, the charging device continuously reciprocates in the same direction as the wire stretching direction.

また、請求項3に記載の発明は、請求項1又は2記載の電子写真用感光体劣化加速試験方法において、前記感光体がワイヤ張架方向と同一方向に連続往復移動することを特徴とする。   According to a third aspect of the invention, in the electrophotographic photosensitive member deterioration acceleration test method according to the first or second aspect, the photosensitive member continuously reciprocates in the same direction as the wire stretching direction. .

また、請求項4に記載の発明は、請求項1から3のいずれか1項に記載の電子写真用感光体劣化加速試験方法において、前記感光体の劣化領域を決定する試料押さえの開口部の面積は、帯電器の開口部の面積よりも小さく、かつ前記感光体又は前記帯電装置の移動する範囲は、試料押さえの開口領域が帯電器の開口領域内で略水平方向に稼動することを特徴とする。   According to a fourth aspect of the present invention, in the electrophotographic photosensitive member deterioration acceleration test method according to any one of the first to third aspects, the opening of the sample presser that determines the deterioration region of the photosensitive member is provided. The area is smaller than the area of the opening of the charger, and the moving range of the photoconductor or the charging device is such that the opening area of the sample press operates in a substantially horizontal direction within the opening area of the charger. And

また、請求項5に記載の発明は、電子写真用感光体劣化加速試験機において、高電圧が印加される複数のワイヤを有し、前記ワイヤが1方向に張架され、前記ワイヤを囲むケーシングは、感光体面に対して平行な面は全てケーシングされていない帯電装置と、前記ワイヤの張架されている方向に対して同一又は略水平方向でかつ異なる方向に連続的に往復稼動する稼動手段とを有することを特徴とする。   The invention according to claim 5 is the electrophotographic photoreceptor deterioration acceleration testing machine, comprising a plurality of wires to which a high voltage is applied, the wires being stretched in one direction, and surrounding the wires Is a charging device in which all surfaces parallel to the surface of the photosensitive member are not casing, and operating means that continuously reciprocates in the same or substantially horizontal direction and in different directions with respect to the direction in which the wire is stretched. It is characterized by having.

本発明によれば、帯電装置のワイヤ張架方向に対して垂直方向だけでなく、ワイヤ張架方向に対する方向でも帯電ムラを抑制する等、電子写真用感光体の劣化領域全体に渡る帯電ムラの抑制が可能となる電子写真用感光体の劣化加速試験方法が実現される。   According to the present invention, charging unevenness over the entire degradation region of the electrophotographic photosensitive member is suppressed, such as suppressing charging unevenness not only in the direction perpendicular to the wire stretching direction of the charging device but also in the direction with respect to the wire stretching direction. A method for accelerating deterioration of an electrophotographic photoreceptor that can be suppressed is realized.

以下、図面を参照して、本発明の実施形態を詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図1及び図9は、本発明の実施形態に係る感光体の劣化加速試験装置の概略図である。まずは、図1、図9を参照しながら劣化加速試験を説明する。   1 and 9 are schematic views of a photoreceptor deterioration acceleration test apparatus according to an embodiment of the present invention. First, the deterioration acceleration test will be described with reference to FIGS.

試験試料14(ここでは感光体試料片を使用)の感光体表面が上になるように試験試料台15の上に載せる。試験試料台15の表面には、アースに接続された導電性の部材が取り付けられており、またこの試験試料台15の上面と側面には図3及び図4にそれぞれ示すように、エアー吸引口21が設けられている。試料台上面図を図3に、また側面図を図4に示す。   The test sample 14 (here, a photoconductor sample piece is used) is placed on the test sample table 15 so that the surface of the photoconductor faces up. A conductive member connected to the ground is attached to the surface of the test sample stage 15, and an air suction port is provided on the top and side surfaces of the test sample stage 15 as shown in FIGS. 21 is provided. A top view of the sample stage is shown in FIG. 3, and a side view is shown in FIG.

さらに、試験試料台15には、エアーチューブ17が取り付けられており、吸引バルブ18でエアーの吸引開閉の調整を行い、レギュレータ19でエアー圧を調整可能となっている。また排気口には、オゾンフィルタ20が取り付けられ、オゾンを除去している。   Further, an air tube 17 is attached to the test sample stage 15, and air suction can be adjusted by a suction valve 18 and an air pressure can be adjusted by a regulator 19. An ozone filter 20 is attached to the exhaust port to remove ozone.

試験試料14が試験試料台15に密着するように試験試料押さえ12で押さえる。試験試料を設置したときの試料台上面図を図5に示す。試験試料押さえ12は、試験時の劣化領域の設定と、帯電時に感光体端部へ放電が集中するのを防止する機能を持つ。   The test sample 14 is pressed by the test sample presser 12 so that the test sample 14 is in close contact with the test sample stage 15. A top view of the sample stage when the test sample is installed is shown in FIG. The test sample holder 12 has a function of setting a deteriorated area during the test and preventing the discharge from concentrating on the edge of the photoconductor during charging.

試験試料14の上面で所定の光量になるように設定された露光装置10によって感光体面に露光し、高圧電源13に接続された帯電器11でコロナ放電と露光を同時に行うことにより、帯電同時露光による劣化加速試験が可能となる。帯電器11は、図6〜8に表されており、図7及び図8に示すように、複数のワイヤ23を有し、このワイヤ23が図8に示すように同一方向に張架されており、帯電器11の資料対向面(下面)は開口しており、ワイヤ支持部材であるワイヤ張架治具22は絶縁性で、ワイヤ23のテンション(張力)は図8に示すワイヤ張架治具22によって適宜調整可能に構成されている。   Exposure on the surface of the photosensitive member by the exposure apparatus 10 set to have a predetermined light amount on the upper surface of the test sample 14, and simultaneous corona discharge and exposure are performed simultaneously by the charger 11 connected to the high-voltage power source 13, thereby simultaneously charging. Degradation acceleration test by is possible. The charger 11 is shown in FIGS. 6 to 8, and has a plurality of wires 23 as shown in FIGS. 7 and 8, and these wires 23 are stretched in the same direction as shown in FIG. The material facing surface (lower surface) of the charger 11 is open, the wire stretching jig 22 as a wire support member is insulative, and the tension (tension) of the wire 23 is shown in FIG. The tool 22 can be appropriately adjusted.

帯電器11は、図9に示すように、帯電器保持治具24によって保持され、帯電器保持治具24の下に帯電器移動用レール25が取り付けられ、帯電器11をワイヤ張架方向(紙面横方向)と同一方向(張架方向と平行も含む)あるいは張架方向と異なる方向であってかつ、略水平の方向に移動する事が可能である。なお、張架方向に対して異なる場合の方向角度は、x−yステージ等を用いて前記レールの方向を調整することができ、さらに他の公知の手段を用いることもできる。   As shown in FIG. 9, the charger 11 is held by a charger holding jig 24, and a charger moving rail 25 is attached under the charger holding jig 24, so that the charger 11 is attached in the wire stretching direction ( It is possible to move in the same direction (including the direction parallel to the stretching direction) or a direction different from the stretching direction and in a substantially horizontal direction. In addition, the direction angle in the case where it differs with respect to a stretching direction can adjust the direction of the said rail using an xy stage etc., Furthermore, another well-known means can also be used.

また、試験試料台15は、ステージ16によって、劣化加速試験中に帯電器11のワイヤ23が張架されている方向に対して垂直方向に往復移動が可能であり、帯電ムラの抑制が可能である。劣化加速試験中の試験試料に流れる電流の大きさを変化させることにより、単位時間あたりの通過電荷量の変化が可能となり、劣化の加速の度合い(加速勾配あるいは加速強度)を変化させることが可能になる。劣化加速試験終了後、帯電能、電荷保持性能、感光層中の蓄積電荷(残留電位)等の特性値を測定し評価する。あるいは(さらに)、感光体の表面観察によって、感光体の劣化度合いも確認する。また、感光体の評価方法として、画像形成装置の画像形成プロセスにおいて感光体に流れる通紙枚数に対応した通過電荷量の分を、本実施形態における劣化加速試験装置を用いて短時間に流せば、画像形成装置への通紙後の感光体の静電特性を予測することができる。   Further, the test sample stage 15 can be reciprocated in a direction perpendicular to the direction in which the wire 23 of the charger 11 is stretched during the deterioration acceleration test by the stage 16, and charging unevenness can be suppressed. is there. By changing the magnitude of the current flowing through the test sample during the accelerated deterioration test, the amount of passing charge per unit time can be changed, and the degree of acceleration of acceleration (acceleration gradient or acceleration intensity) can be changed. become. After completion of the deterioration acceleration test, characteristic values such as charging ability, charge retention performance and accumulated charge (residual potential) in the photosensitive layer are measured and evaluated. Alternatively (further), the degree of deterioration of the photoconductor is also confirmed by observing the surface of the photoconductor. In addition, as a method for evaluating the photosensitive member, the passage charge amount corresponding to the number of sheets passing through the photosensitive member in the image forming process of the image forming apparatus can be caused to flow in a short time using the deterioration acceleration test apparatus in the present embodiment. The electrostatic characteristics of the photoconductor after passing through the image forming apparatus can be predicted.

試験試料台15の上面と側面のエアー吸引口21から吸引するエアーは、1つの吸引バルブ18から吸引するのが望ましい。2つの吸引バルブで吸引した場合では、装置が複雑化する。また、劣化加速試験装置で使用する試験試料押さえ12は、絶縁性部材が望ましい。導電性部材では帯電時に試験試料押さえ12に放電され易くなり、試料側への放電が少なくなり、また感光体の電荷が試験試料押さえ12に移動し易くなるため、試験試料14への電流量を増加することが困難となる。   The air sucked from the air suction ports 21 on the upper and side surfaces of the test sample stage 15 is preferably sucked from one suction valve 18. When suction is performed with two suction valves, the apparatus becomes complicated. Moreover, the test sample holder 12 used in the deterioration acceleration test apparatus is preferably an insulating member. The conductive member is easily discharged to the test sample holder 12 at the time of charging, the discharge to the sample side is reduced, and the charge of the photoconductor is easily transferred to the test sample holder 12, so that the amount of current to the test sample 14 is reduced. It becomes difficult to increase.

露光装置11には、蛍光灯、タングステンランプ、ハロゲンランプ、水銀灯、ナトリウム灯、発光ダイオード(LED)、半導体レーザ(LD)、エレクトロルミネッセンス(EL)等の発光物全般を用いることができる。そして、所望の波長域の光のみを照射するために、シャープカットフィルタ、バンドパスフィルタ、近赤外カットフィルタ、ダイクロイックフィルタ、干渉フィルタ、色温度変換フィルタ等の各種フィルタを用いることもでき、光量低下のためにニュートラルデンシティフルタを用いることもできる。   The exposure apparatus 11 can use all luminescent materials such as a fluorescent lamp, a tungsten lamp, a halogen lamp, a mercury lamp, a sodium lamp, a light emitting diode (LED), a semiconductor laser (LD), and an electroluminescence (EL). Various types of filters such as sharp cut filters, band pass filters, near infrared cut filters, dichroic filters, interference filters, and color temperature conversion filters can be used to irradiate only light in a desired wavelength range. Neutral density filters can also be used for reduction.

被試験試料14の表面を帯電処理するための帯電装置用電源回路の制御手段、該被試験試料を光照射するための光源用電源回路の制御手段は、図示していないが、これらは、従来公知のものをそのまま用いることができる。   Although the control means of the power supply circuit for the charging device for charging the surface of the sample 14 to be tested and the control means of the power supply circuit for the light source for irradiating the sample to be tested are not shown, A well-known thing can be used as it is.

加速劣化試験装置は、光を透過しない暗箱あるいは暗幕等で覆われていることが好ましい。加速劣化試験装置が暗箱あるいは暗幕で覆われていないと、試験時に外部環境(風、雨、塵、光、湿度等)の影響を受け、正確な劣化加速試験が困難となる。   The accelerated deterioration test apparatus is preferably covered with a dark box or a black screen that does not transmit light. If the accelerated deterioration test apparatus is not covered with a dark box or black screen, it will be affected by the external environment (wind, rain, dust, light, humidity, etc.) during the test, making accurate deterioration acceleration tests difficult.

本実施形態に用いる感光体は、導電性支持体の上に電荷発生層、電荷輸送層が形成されたもの、さらに電荷輸送層の上に保護層が形成されたもの等が使用可能である。導電性支持体及び電荷発生層、電荷輸送層としては、公知のものならば如何なるものでも使用することができる。   As the photoconductor used in the exemplary embodiment, those in which a charge generation layer and a charge transport layer are formed on a conductive support, and those in which a protective layer is formed on the charge transport layer can be used. As the conductive support, the charge generation layer and the charge transport layer, any known one can be used.

続いて、以下実施例により本発明の実施形態をさらに具体的に説明するが、本実施形態はこれらの実施例により、何等限定されるものではない。   Next, embodiments of the present invention will be described more specifically with reference to the following examples. However, the present embodiment is not limited to these examples.

劣化試験は、図1に示す感光体劣化加速試験装置を使用する。その試験装置で使用する帯電装置は、対向する感光体面に対して平行な面にケーシングは無く60×60(mm)の開口枠を有し、その枠内に10mm間隔で1方向のみワイヤ(材質:金メッキタングステンレスワイヤ、ワイヤ径:60μm)が張られ、帯電装置の枠は絶縁性部材(材質:ポリテトラフルオロエチレン PTFE(テフロン(登録商標)))である帯電装置を使用し、露光装置にはハロゲンランプを使用する。また、この試験装置での感光体面とワイヤの距離は5mmとし、サンプル台(サイズ:75mm×75mm×50mm)の上に感光体試料片を置く。サンプル台には、上面と側面にエアー吸引口があり、エアー排気口にはオゾンフィルタが設置されている。エアー吸引口は、φ2mmの穴が16個開いており(12mm4列に均等間隔で)、側面の4面全てに、φ2mmの穴が各面に4つ12mm間隔で均等に開いている。試験試料押さえ12には、絶縁性部材(材質:PTFE(テフロン(登録商標))、開口部:50×40mm)を使用し、感光体14を試験試料台15に密着させた。また、感光体試料片14は、リコーIPSIO Color6500用感光体と同じ材料で同一に構成したものを使用し、劣化加速試験を実施した。   For the deterioration test, a photoconductor deterioration acceleration test apparatus shown in FIG. 1 is used. The charging device used in the test device has a 60 x 60 (mm) open frame without a casing on a surface parallel to the opposing photoconductor surface, and a wire (material) only in one direction at 10 mm intervals in the frame. : Gold-plated tungsten-less wire, wire diameter: 60 μm), and charging device frame uses a charging device that is an insulating member (material: polytetrafluoroethylene PTFE (Teflon (registered trademark))). Uses a halogen lamp. The distance between the photoreceptor surface and the wire in this test apparatus is 5 mm, and a photoreceptor specimen is placed on a sample table (size: 75 mm × 75 mm × 50 mm). The sample stage has air suction ports on the top and side surfaces, and an ozone filter is installed at the air exhaust port. The air suction port has 16 φ2mm holes (12mm in 4 rows at regular intervals), and all four sides have 4φ2mm holes on each side evenly at 12mm intervals. For the test sample holder 12, an insulating member (material: PTFE (Teflon (registered trademark)), opening: 50 × 40 mm) was used, and the photoconductor 14 was brought into close contact with the test sample stage 15. The photoreceptor sample piece 14 was made of the same material as that of the photoreceptor for Ricoh IPSIO Color 6500, and was subjected to a deterioration acceleration test.

劣化加速試験中の感光体試料面の通過電流(通過電流密度)を5.8μA/cm2、照度を
130luxに設定し、120分間劣化加速試験を行った。劣化試験中は、帯電器移動用レールを使用して、帯電器をワイヤ張架している方向に2mm連続往復移動させ、かつ劣化試験中は、サンプル台をワイヤが張架している方向に対して垂直方向に10mm連続往復移動させ、劣化加速試験を実施した。
The passing current (passing current density) of the photoconductor sample surface during the accelerated degradation test is 5.8 μA / cm 2 , and the illuminance is
The degradation acceleration test was performed for 120 minutes with 130lux set. During the deterioration test, the charger moving rail is used to move the charger back and forth continuously by 2 mm in the direction where the wire is stretched, and during the deterioration test, the sample table is moved in the direction where the wire is stretched. On the other hand, 10 mm continuous reciprocation was performed in the vertical direction, and a deterioration acceleration test was conducted.

劣化加速試験中の感光体試料面の通過電流を5.8μA/cm2、照度を130luxに設定し120分間劣化加速試験を行った。劣化試験中は、帯電器移動用レールを使用して、帯電器をワイヤ張架している方向に10mm連続往復移動させ、かつ劣化試験中はサンプル台をワイヤが張架している方向(図8に示す紙面横方向)に対して垂直方向に(図8に示す紙面上下方向)10mm連続往復移動させ、劣化加速試験を実施した。 A deterioration acceleration test was conducted for 120 minutes by setting the passing current of the photosensitive member surface during the deterioration acceleration test to 5.8 μA / cm 2 and the illuminance to 130 lux. During the degradation test, the charger moving rail is used to reciprocate the charger 10 mm continuously in the direction in which the wire is stretched, and during the degradation test, the direction in which the wire is stretched over the sample table (Fig. 8 was continuously reciprocated 10 mm in the vertical direction (the vertical direction of the paper surface shown in FIG. 8) with respect to the horizontal direction of the paper surface shown in FIG.

劣化加速試験中の感光体試料面の通過電流を5.8μA/cm2、照度を130luxに設定し、120分間劣化加速試験を行った。サンプル台のステージを帯電器11の対角線方向(図8の紙面斜め方向)に移動可能な構造に改造し、劣化試験中にサンプル台のステージを帯電器の対角線方向へ14.1mm連続往復移動させ、劣化加速試験を実施した。これにより、サンプル台を帯電器の対角線方向に往復移動させることは、サンプル台をワイヤが張架している方向に対して垂直方向に往復移動させることと、ワイヤ張架方向に往復移動させることという両方の往復移動を実現させている。 The deterioration acceleration test was conducted for 120 minutes by setting the passing current of the surface of the photoreceptor sample during the deterioration acceleration test to 5.8 μA / cm 2 and the illuminance to 130 lux. The stage of the sample stage is modified to a structure that can move in the diagonal direction of the charger 11 (diagonal direction in FIG. 8). During the deterioration test, the stage of the sample stage is continuously reciprocated 14.1 mm in the diagonal direction of the charger. A deterioration acceleration test was conducted. Thus, reciprocating the sample stage in the diagonal direction of the charger means reciprocating the sample stage in a direction perpendicular to the direction in which the wire is stretched and reciprocating in the wire stretch direction. Both reciprocating movements are realized.

<比較例1>
劣化加速試験中の感光体試料面の通過電流を5.8μA/cm2、照度を130luxに設定し、120分間劣化加速試験を行った。劣化試験中は、サンプル台をワイヤが張架している方向に対して垂直方向に10mm連続往復移動させ、帯電器のワイヤ張架方向への移動は全く行わずに劣化加速試験を実施した。
<Comparative Example 1>
The deterioration acceleration test was conducted for 120 minutes by setting the passing current of the surface of the photoreceptor sample during the deterioration acceleration test to 5.8 μA / cm 2 and the illuminance to 130 lux. During the deterioration test, the sample stage was continuously reciprocated 10 mm in the direction perpendicular to the direction in which the wire was stretched, and the deterioration acceleration test was performed without any movement of the charger in the wire stretch direction.

<比較例2>
劣化加速試験中の感光体試料面の通過電流を5.8μA/cm2、照度を130luxに設定し、120分間劣化加速試験を行った。劣化試験中は、帯電器移動用レールを使用して、帯電器をワイヤ張架している方向に30mm連続往復移動させ、かつ劣化試験中は、サンプル台をワイヤが張架している方向に対して垂直方向に10mm連続往復移動させ、劣化加速試験を実施した。
<Comparative example 2>
The deterioration acceleration test was conducted for 120 minutes by setting the passing current of the surface of the photoreceptor sample during the deterioration acceleration test to 5.8 μA / cm 2 and the illuminance to 130 lux. During the deterioration test, the charger moving rail is used to move the charger back and forth continuously by 30 mm in the direction in which the wire is stretched. During the deterioration test, the sample table is moved in the direction in which the wire is stretched. On the other hand, 10mm continuous reciprocation was performed in the vertical direction, and a deterioration acceleration test was conducted.

それぞれの条件で劣化加速試験を行った後の感光体表面を観察し、感光体表面の放電生成物付着状況についての結果を表1に示す。なお、劣化に伴って放電生成物が付着していくが、付着している状況によって帯電ムラを判断した。   The surface of the photoreceptor after the deterioration acceleration test under each condition was observed, and the results of the discharge product adhesion state on the photoreceptor surface are shown in Table 1. In addition, although the discharge product adheres with deterioration, the charging unevenness was judged according to the state of adhesion.

Figure 2007155993
○:付着ムラなし。
△:付着ムラは確認できるが、放電生成物付着が全く無い箇所は確認されない。
×:付着ムラが確認でき、放電生成物付着が全く無い箇所が確認できる。
(放電生成物付着ムラを確認した対象面積は、劣化面積の中心部30mm×30mmの位置のみを目視で確認した結果である。)
Figure 2007155993
○: No adhesion unevenness.
(Triangle | delta): Although adhesion nonuniformity can be confirmed, the location which does not have discharge product adhesion at all is not confirmed.
X: Adhesion unevenness can be confirmed, and a portion where no discharge product is adhered can be confirmed.
(The target area in which the discharge product adhesion unevenness has been confirmed is the result of visually confirming only the position of the central portion 30 mm × 30 mm of the deteriorated area.)

表1の観察結果から、サンプル台をワイヤ張架している方向に対して垂直方向に連続往復移動させて電子写真用感光体をワイヤ張架している方向に対して垂直方向に連続往復移動させ、かつ帯電器自体をワイヤ張架方向にも往復移動させることで、放電生成物付着ムラが抑制され、帯電ムラが抑制されることが分かる。また、電子写真用感光体をワイヤ張架している方向に対して垂直方向に連続往復移動させ、かつ電子写真用感光体をワイヤ張架方向にも往復移動させる方法によっても、放電生成物付着ムラが抑制され、帯電ムラが抑制されることが分かる。さらに、ワイヤ張架方向への移動量は、大きい方がワイヤ張架方向の放電生成物の付着ムラは良くなることが分かる。しかし、帯電器自体をワイヤ張架方向に往復移動させる範囲は、試料押さえの開口領域が帯電器の開口領域内となるような水平方向の位置関係でなければ、電子写真用感光体の劣化領域が帯電領域から外れてしまい、試験精度が悪くなり、放電生成物付着ムラ結果で確認されているように、帯電ムラが発生してしまうことが分かる。   From the observation results in Table 1, the sample table is continuously reciprocated in the direction perpendicular to the direction of the wire tension, and the electrophotographic photoreceptor is continuously reciprocated in the direction perpendicular to the direction of the wire tension. In addition, it can be seen that, by reciprocating the charger itself also in the wire stretching direction, discharge product adhesion unevenness is suppressed and charging unevenness is suppressed. Also, the discharge product adheres by the method in which the electrophotographic photosensitive member is continuously reciprocated in the direction perpendicular to the direction in which the wire is stretched and the electrophotographic photosensitive member is also reciprocated in the direction of wire stretching. It can be seen that unevenness is suppressed and charging unevenness is suppressed. Furthermore, it can be seen that the larger the amount of movement in the wire stretching direction, the better the unevenness of the adhesion of the discharge products in the wire stretching direction. However, the range in which the charger itself is reciprocated in the wire stretching direction is not a horizontal positional relationship in which the opening area of the sample holder is within the opening area of the charger, and the deterioration area of the electrophotographic photosensitive member As a result, the test accuracy is deteriorated and the charging unevenness is generated as confirmed by the discharge product adhesion unevenness result.

なお、上述する実施形態は、本発明の好適な実施形態であり、上記実施形態のみに本発明の範囲を限定するものではなく、本発明の要旨を逸脱しない範囲において種々の変更を施した形態での実施が可能である。   The above-described embodiment is a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiment alone, and various modifications are made without departing from the gist of the present invention. Implementation is possible.

本発明の実施形態に係る感光体劣化加速試験装置の概略構成図である。1 is a schematic configuration diagram of a photoreceptor deterioration acceleration test apparatus according to an embodiment of the present invention. 従来の感光体試料片の特性評価及び劣化試験装置の概略構成図である。It is a schematic block diagram of the conventional characteristic evaluation and deterioration test apparatus of a photoreceptor sample piece. 本発明の実施形態における感光体で使用される試料台の上面の概略構成図である。It is a schematic block diagram of the upper surface of the sample stand used with the photoconductor in the embodiment of the present invention. 本発明の実施形態における感光体で使用される試料台の側面の概略構成図である。It is a schematic block diagram of the side surface of the sample stand used with the photoconductor in the embodiment of the present invention. 本発明の実施形態に係る感光体劣化加速試験装置の試験試料台の上面の概略構成図である。It is a schematic block diagram of the upper surface of the test sample stand of the photoreceptor deterioration acceleration test apparatus according to the embodiment of the present invention. 本発明の実施形態に係る感光体劣化加速試験装置の帯電器上面の概略構成図である。It is a schematic block diagram of the upper surface of the charger of the photoreceptor deterioration acceleration test apparatus according to the embodiment of the present invention. 本発明の実施形態に係る感光体劣化加速試験装置の帯電器正面の概略構成図である。It is a schematic block diagram of the front of the charger of the photoconductor deterioration acceleration test apparatus according to the embodiment of the present invention. 本発明の実施形態に係る感光体劣化加速試験装置の帯電器下面の概略構成図である。It is a schematic block diagram of the lower surface of the charger of the photoreceptor deterioration acceleration test apparatus according to the embodiment of the present invention. 本発明の実施形態に係る感光体劣化試験装置の帯電部の他の概略構成図である。It is another schematic block diagram of the charging part of the photoreceptor deterioration test apparatus according to the embodiment of the present invention.

符号の説明Explanation of symbols

1 ターンテーブル
2 試料片押さえ板
3 開口部
4 コロナ帯電器
5 表面電位計電極部・露光装置
6 電流計測・平滑化回路、他
7 表面電位計:アンプ回路、他
8 インターフェース(A/D変換)
9 コントローラ
10 露光装置
11 帯電器
12 試験試料押さえ
13 高圧電源
14 試験試料
15 試験試料台
16 ステージ
17 エアチューブ
18 吸引バルブ
19 レギュレータ
20 オゾンフィルタ
21 エアー吸引口
22 ワイヤ張架治具
23 ワイヤ
24 帯電器保持治具
25 帯電器移動用レール
DESCRIPTION OF SYMBOLS 1 Turntable 2 Specimen piece holding plate 3 Opening 4 Corona charger 5 Surface potential meter electrode part / exposure device 6 Current measurement / smoothing circuit, etc. 7 Surface potential meter: Amplifier circuit, etc. 8 Interface (A / D conversion)
DESCRIPTION OF SYMBOLS 9 Controller 10 Exposure apparatus 11 Charger 12 Test sample holder 13 High voltage power supply 14 Test sample 15 Test sample stand 16 Stage 17 Air tube 18 Suction valve 19 Regulator 20 Ozone filter 21 Air suction port 22 Wire tension jig 23 Wire 24 Charger Holding jig 25 Rail for moving charger

Claims (5)

感光体を帯電する帯電工程と露光工程とを含むサイクルを繰り返して感光体の劣化を加速させ、画像形成装置の前記感光体の全通過電荷量に対し、前記全通過電荷量値の通過電流値を変えて流して前記電子写真用感光体の劣化を予測する電子写真用感光体劣化加速試験方法において、
前記帯電工程は、1方向に張架され前記感光体面に対して平行な面は全てケーシングされていない複数のワイヤにより高電圧を印加する帯電装置によって行う工程であり、
前記帯電工程と前記露光工程とを同時に行い、前記ワイヤが張架されている方向に対して同一方向に連続して往復稼動又は略水平でかつ異なる方向に連続して往復稼動することを特徴とする電子写真用感光体劣化加速試験方法。
A cycle including a charging step for charging the photosensitive member and an exposure step is repeated to accelerate deterioration of the photosensitive member, and a passing current value of the total passing charge amount value with respect to the total passing charge amount of the photosensitive member of the image forming apparatus. In the electrophotographic photoreceptor deterioration acceleration test method for predicting the deterioration of the electrophotographic photoreceptor by changing the flow,
The charging step is a step performed by a charging device that applies a high voltage with a plurality of wires that are stretched in one direction and that are parallel to the surface of the photoconductor, all of which are not casing.
The charging step and the exposure step are performed simultaneously, and the reciprocating operation is continuously performed in the same direction with respect to the direction in which the wire is stretched, or the reciprocating operation is performed in a substantially horizontal and different direction. An electrophotographic photoreceptor deterioration acceleration test method.
前記帯電装置が前記ワイヤ張架方向と同一方向に連続往復稼動することを特徴とする請求項1記載の電子写真用感光体劣化加速試験方法。   2. The electrophotographic photoreceptor deterioration acceleration test method according to claim 1, wherein the charging device continuously reciprocates in the same direction as the wire stretching direction. 前記感光体がワイヤ張架方向と同一方向に連続往復移動することを特徴とする請求項1又は2記載の電子写真用感光体劣化加速試験方法。   3. The electrophotographic photosensitive member deterioration acceleration test method according to claim 1, wherein the photosensitive member continuously reciprocates in the same direction as the wire stretching direction. 前記感光体の劣化領域を決定する試料押さえの開口部の面積は、帯電器の開口部の面積よりも小さく、かつ前記感光体又は前記帯電装置の移動する範囲は、試料押さえの開口領域が帯電器の開口領域内で略水平方向に稼動することを特徴とする請求項1から3のいずれか1項に記載の電子写真用感光体劣化加速試験方法。   The area of the opening of the sample holder that determines the deteriorated area of the photoconductor is smaller than the area of the opening of the charger, and the opening area of the sample holder is charged in the range in which the photoconductor or the charging device moves. 4. The electrophotographic photosensitive member deterioration acceleration test method according to claim 1, wherein the method operates in a substantially horizontal direction within an opening region of the apparatus. 高電圧が印加される複数のワイヤを有し、前記ワイヤが1方向に張架され、前記ワイヤを囲むケーシングは、感光体面に対して平行な面は全てケーシングされていない帯電装置と、
前記ワイヤの張架されている方向に対して同一又は略水平方向でかつ異なる方向に連続的に往復稼動する稼動手段とを有することを特徴とする電子写真用感光体劣化加速試験機。
A charging device having a plurality of wires to which a high voltage is applied, the wires are stretched in one direction, and a casing surrounding the wires is not entirely casing in a plane parallel to the photosensitive member surface;
An electrophotographic photoreceptor deterioration acceleration testing machine, comprising operating means for continuously reciprocating in the same or substantially horizontal direction and in different directions with respect to a direction in which the wire is stretched.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009014809A (en) * 2007-07-02 2009-01-22 Sharp Corp Deterioration test equipment for corona charger
JP2012002718A (en) * 2010-06-18 2012-01-05 Ricoh Co Ltd Photoreceptor degrading acceleration testing device and photoreceptor degrading acceleration testing method

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JPH0227151A (en) * 1988-07-15 1990-01-29 Mitsubishi Heavy Ind Ltd Combustion chamber of rocket engine and manufacture thereof
JP2002149005A (en) * 2000-11-10 2002-05-22 Ricoh Co Ltd Test device for accelerating deterioration of photoreceptor
JP2005099133A (en) * 2003-09-22 2005-04-14 Ricoh Co Ltd Method for accelerated testing of deterioration in electrophotographic photoreceptor and electrostatic charger used for the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0227151A (en) * 1988-07-15 1990-01-29 Mitsubishi Heavy Ind Ltd Combustion chamber of rocket engine and manufacture thereof
JP2002149005A (en) * 2000-11-10 2002-05-22 Ricoh Co Ltd Test device for accelerating deterioration of photoreceptor
JP2005099133A (en) * 2003-09-22 2005-04-14 Ricoh Co Ltd Method for accelerated testing of deterioration in electrophotographic photoreceptor and electrostatic charger used for the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009014809A (en) * 2007-07-02 2009-01-22 Sharp Corp Deterioration test equipment for corona charger
JP2012002718A (en) * 2010-06-18 2012-01-05 Ricoh Co Ltd Photoreceptor degrading acceleration testing device and photoreceptor degrading acceleration testing method

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