JPH06348083A - Method and device for detecting deterioration of photosensitive body for copying machine - Google Patents
Method and device for detecting deterioration of photosensitive body for copying machineInfo
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- JPH06348083A JPH06348083A JP5159940A JP15994093A JPH06348083A JP H06348083 A JPH06348083 A JP H06348083A JP 5159940 A JP5159940 A JP 5159940A JP 15994093 A JP15994093 A JP 15994093A JP H06348083 A JPH06348083 A JP H06348083A
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- Prior art keywords
- photoconductor
- charging
- potential
- copying machine
- electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は複写機に関するものであ
り、詳細には静電式と称されている複写機に用いられて
いる感光体の使用途上における劣化の検出方法及び検出
装置に係るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine, and more particularly to a method and apparatus for detecting deterioration during use of a photoconductor used in a copying machine called an electrostatic type. It is a thing.
【０００２】[0002]
【従来の技術】従来のこの種の複写機における感光体８
０の劣化検出装置９０の例を示すものが図５であり、ド
ラム状などとして形成された感光体８０は図中に矢印Ｒ
に示す方向に回動するものとして形成され、所定位置に
は複写を行うために予めに前記感光体８０に一様な電位
の帯電を行わせるための放電ワイヤなどによる帯電装置
８１が設けられている。2. Description of the Related Art A photoconductor 8 in a conventional copying machine of this type.
FIG. 5 shows an example of the deterioration detecting device 90 of No. 0, and the photoconductor 80 formed in a drum shape or the like has an arrow R in the drawing.
Is formed so as to rotate in the direction shown in FIG. 1, and a charging device 81, such as a discharge wire, is provided at a predetermined position in order to charge the photoconductor 80 in advance to a uniform potential for copying. There is.
【０００３】更に前記感光体８０の回転方向には前記劣
化検出装置９０の構成の一部である電極９１が所定の間
隔Ｅを有して対峙されると共に、前記電極９１は音叉な
ど振動子９２に取付けられるものとされて、この振動子
９２を駆動する発信器９３により例えば１ｋＨｚなど所
定の周波数で微振動し、前記電極９１は感光体８０との
間隔を前記した所定の間隔Ｅを中心として周期的に変化
するものとなる。Further, in the rotating direction of the photoconductor 80, electrodes 91, which are a part of the structure of the deterioration detecting device 90, are opposed to each other with a predetermined interval E, and the electrodes 91 include a vibrator 92 such as a tuning fork. The oscillator 93 for driving the vibrator 92 vibrates slightly at a predetermined frequency such as 1 kHz, and the electrode 91 is spaced from the photoconductor 80 by the predetermined distance E as a center. It will change periodically.
【０００４】前記電極９１は抵抗器９４で接地されてい
るので、前記感光体８０の帯電電位は振動する前記電極
９１に微小な交流電位として検出され、この検出出力を
オペレーショナルアンプなど増幅器９５で増幅し、その
後に基準値と比較を行うことなどで、前記感光体８０の
劣化の度合いを検定するものである。尚、図中に符号９
６で示すものは前記帯電装置８１に高電圧を供給するた
めの高圧発生回路である。Since the electrode 91 is grounded by the resistor 94, the charged potential of the photoconductor 80 is detected as a minute AC potential by the vibrating electrode 91, and the detected output is amplified by the amplifier 95 such as an operational amplifier. Then, the degree of deterioration of the photoconductor 80 is tested by comparing with a reference value after that. In the figure, reference numeral 9
6 is a high voltage generating circuit for supplying a high voltage to the charging device 81.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、前記し
た従来の劣化検出装置９０の構成においては、第一に
は、前記電極９１を振動子９２、発振器９３などで振動
するものとして形成を行わざるを得ないものとなり、構
成が複雑化しコストアップする問題点を生じるととも
に、取付精度も要求されて生産性、或いはメンテナンス
時の再現性など取扱上の問題点も生じるものとなってい
る。However, in the structure of the above-described conventional deterioration detecting device 90, first, the electrode 91 must be formed so as to vibrate by the oscillator 92, the oscillator 93, or the like. In addition to the disadvantage that the structure becomes complicated and the cost is increased, the mounting accuracy is required, and the handling problem such as the productivity or the reproducibility at the time of maintenance also occurs.
【０００６】また、前記振動子９２は連続して振動が行
われるものであるので、機械的疲労が甚だしく、比較的
に短寿命となり、これにより劣化検出装置９０全体の信
頼性が低下する問題点も生じるものとなり、これらの点
の解決が課題とされるものとなっていた。Further, since the vibrator 92 vibrates continuously, mechanical fatigue is severe and the life of the vibrator 92 is relatively short, which reduces the reliability of the deterioration detecting device 90 as a whole. It has also become a problem, and the solution of these points has become an issue.
【０００７】[0007]
【課題を解決するための手段】本発明は前記した従来の
課題を解決するための具体的な手段として、複写機の感
光体の感光面を回転方向に沿い周期的に断続する帯電電
位として帯電させ、前記感光面に電極を対峙させて前記
感光面の回転によりこの電極に前記帯電電位を交流電圧
として出力させ、前記交流電圧の電位により前記複写機
感光体の帯電状態を測定し判定を行うことを特徴とする
複写機感光体の劣化検出方法を提供し、加えて、その具
体策である複写機感光体の劣化検出装置を提供すること
で課題を解決するものである。As a concrete means for solving the above-mentioned conventional problems, the present invention charges the photosensitive surface of a photoconductor of a copying machine as a charging potential that is periodically interrupted along the rotational direction. Then, the electrodes are opposed to the photosensitive surface, and the charging potential is output to this electrode as an AC voltage by the rotation of the photosensitive surface, and the charged state of the photoconductor of the copying machine is measured and judged by the potential of the AC voltage. The problem is solved by providing a method for detecting deterioration of a photoconductor of a copying machine, which is characterized by the above, and also by providing a deterioration detecting device for a photoconductor of the copying machine, which is a specific measure thereof.
【０００８】[0008]
【実施例】つぎに、本発明を図に示す実施例に基づいて
詳細に説明する。図１に示すものは本発明の第一実施例
であり、図中に符号１で示すものは複写機の感光体１０
の劣化検出装置であって、この劣化検出装置１は複写動
作時に図中に矢印Ｒで示す方向に回転を行う感光体１０
に対し設けられるものである点は従来例のものと同様で
ある。EXAMPLES The present invention will now be described in detail based on the examples shown in the drawings. 1 shows the first embodiment of the present invention, and the reference numeral 1 in the figure designates the photoconductor 10 of the copying machine.
Of the photoconductor 10 that rotates in a direction indicated by an arrow R in the drawing during a copying operation.
Is the same as that of the conventional example.
【０００９】また、前記感光体１０の所定位置には放電
ワイヤによる帯電装置２が設けられ、複写に先立ち前記
感光体１０に一様な電位の帯電が行われるものとされて
いる点も従来例のものと同様であるが、この実施例にお
いては前記帯電装置２にも劣化検出装置１としての機能
の一端を負わせるものであり、前記帯電装置２には高圧
発生回路３との間に断続装置４が接続されて、この帯電
装置２に印加される電位を周期的に断続することが可能
な構成とされている。Further, a conventional example is that a charging device 2 using a discharge wire is provided at a predetermined position on the photoconductor 10 so that the photoconductor 10 is charged to a uniform potential prior to copying. However, in this embodiment, the charging device 2 is also endowed with a part of the function as the deterioration detecting device 1, and the charging device 2 is intermittently connected to the high voltage generating circuit 3. The device 4 is connected so that the electric potential applied to the charging device 2 can be periodically interrupted.
【００１０】また、前記感光体１０の回転方向側には、
所定の間隔を有し対峙して電極装置５が配置されている
が、この電極装置５には従来例のもののように振動子な
どが設けられることはなく、固定するものとして設けら
れている。また、前記電極装置５の出力には、従来例の
ものと同様に抵抗器６、増幅器７が接続され、前記電極
装置５からの出力を後の処理が容易となるようにしてい
る。Further, on the rotational direction side of the photoconductor 10,
Although the electrode devices 5 are arranged facing each other with a predetermined interval, the electrode device 5 is provided as a fixed device without being provided with a vibrator or the like unlike the conventional device. Further, the resistor 6 and the amplifier 7 are connected to the output of the electrode device 5 as in the conventional example, so that the output from the electrode device 5 can be easily processed later.
【００１１】図２は、前記断続装置４を動作させたとき
の感光体１０の帯電状態を模式的に示したものであり、
前記した周期的に断続する帯電装置２により回転する感
光体１０には回転方向に直交する断続的な帯電電位が与
えられるものとなり、この帯電電位が順次に電極装置５
に達し、帯電部分Ｃの電位（例えば８００Ｖ：図中に白
地で示す）と非帯電部分Ｄの電位（０Ｖ：図中に黒地で
示す）とが交互に通過するものとなる。FIG. 2 schematically shows the charged state of the photoconductor 10 when the interrupting device 4 is operated.
An intermittent charging potential orthogonal to the rotation direction is applied to the photoconductor 10 rotating by the charging device 2 which is periodically interrupted, and this charging potential is sequentially applied.
And the potential of the charged portion C (for example, 800 V: shown in a white background in the figure) and the potential of the non-charged portion D (0 V: shown in a black background in the figure) alternately pass.
【００１２】従って、電極装置５には交流の出力を生
じ、この出力を増幅器７で増幅し、例えば感光体１０の
初期値（即ち、劣化を生じていない状態）を測定して得
た基準値と比較を行うことで、この感光体１０の使用途
上における劣化の進行度合いを測定することが可能とな
る。Therefore, an alternating current output is generated in the electrode device 5, this output is amplified by the amplifier 7, and a reference value obtained by measuring, for example, an initial value (that is, a state in which no deterioration has occurred) of the photoconductor 10 is obtained. By comparing with, it is possible to measure the degree of progress of deterioration of the photoconductor 10 during use.
【００１３】尚、実際の実施に当たっては、前記増幅器
７の出力は前記高圧発生回路３に帰還され、前記電極装
置５の出力（即ち、増幅器７の出力）に常に前記した基
準値が得られるように、前記高圧発生回路３の出力電位
を調整すれば、感光体１０の劣化の進行に係わらず常に
一定品位の複写結果が得られるものとなる。In the actual implementation, the output of the amplifier 7 is fed back to the high-voltage generating circuit 3 so that the output of the electrode device 5 (that is, the output of the amplifier 7) always has the above-mentioned reference value. In addition, by adjusting the output potential of the high voltage generating circuit 3, it is possible to always obtain a copy result of a constant quality regardless of the progress of deterioration of the photoconductor 10.
【００１４】ここで、上記の構成においては、本来が複
写を行うために設けられている帯電装置２を利用してい
るので、複写状態にあるときには感光体１０の検定は行
えないものとなる。しかしながら、前記感光体１０の劣
化の進行はそれ程急激なものではないので、例えば複写
機の電源投入時に帯電装置２を一回だけ劣化検出用とし
て使用する程度でも、その目的は充分に達することがで
きるものである。In the above structure, since the charging device 2 originally provided for copying is used, the photosensitive member 10 cannot be tested in the copying state. However, since the deterioration of the photoconductor 10 is not so rapid, even if the charging device 2 is used only once for detecting the deterioration when the power of the copying machine is turned on, the purpose can be sufficiently achieved. It is possible.
【００１５】図３に示すものは、同じく本発明の第二実
施例であり、前の第一実施例が帯電装置２に印加する電
位を断続させることで、感光体１０に断続する帯電を生
じさせるものとしていたのに対し、この実施例では前記
帯電装置２は一様の電位が印加され感光体１０に一様の
帯電電位を与えるものとされている。FIG. 3 shows a second embodiment of the present invention as well, in which the intermittent charging of the potential applied to the charging device 2 in the previous first embodiment causes intermittent charging of the photoreceptor 10. On the other hand, in this embodiment, the charging device 2 is applied with a uniform electric potential and applies a uniform charging electric potential to the photoconductor 10.
【００１６】加えて、この第二実施例では帯電装置２の
回転方向前方には感光体１０に対峙して例えばＬＥＤな
どによる光源装置８が設けられ、この光源装置８を所定
の周期で点滅させることで、感光体１０の帯電電位を周
期的に断続させるものとしている。尚、前記光源装置８
の更に回転方向前方には前の第一実施例と同様に電極装
置５が設けられていることは言うまでもない。In addition, in the second embodiment, a light source device 8 such as an LED is provided in front of the charging device 2 in the rotating direction so as to face the photoconductor 10, and the light source device 8 is blinked at a predetermined cycle. Thus, the charging potential of the photoconductor 10 is periodically interrupted. The light source device 8
Needless to say, the electrode device 5 is provided further forward in the rotation direction than in the first embodiment.
【００１７】図４は、上記の第二実施例の構成による感
光体１０の帯電状態の例を示すもので、前記光源装置８
は劣化検出の目的のためにのみ設けられたものであるの
で、その設定幅などは自在であり、例えば電極装置５の
面積をカバーするに充分な範囲として設定することが可
能である。FIG. 4 shows an example of the charged state of the photoconductor 10 having the structure of the second embodiment.
Since it is provided only for the purpose of detecting deterioration, its setting width and the like can be freely set, and can be set as a range sufficient to cover the area of the electrode device 5, for example.
【００１８】このことは、図示のように感光体１０が複
写に用いられている範囲の外の部分で断続する帯電状態
を形成することも可能となり、これにより、複写の機能
に影響を及ぼすことなく常時に劣化の進行度合いを検出
することも可能となり、前の第一実施例で説明したよう
に複写機の電源投入時に特別に劣化の進行度合いを検出
するシーケンスを設けるなどを不要とする。This also makes it possible for the photosensitive member 10 to form an intermittent charging state in a portion outside the range used for copying, as shown in the figure, thereby affecting the copying function. It is also possible to constantly detect the degree of progress of deterioration, and it is not necessary to provide a sequence for specially detecting the degree of progress of deterioration when the power of the copying machine is turned on as described in the first embodiment.
【００１９】以上に説明したように、本発明においては
感光体１０に周期的に断続する帯電電位を形成すること
で、その帯電電位を検出する電極装置５から振動子など
を取除き、この電極装置５を固定することに目的がある
もので、このようにすることで前記電極装置５は構成が
簡素化されると共に、測定精度を向上させるために極端
に高い機械的精度が要求されることもなくなり、生産性
が向上すると共に測定精度も向上する。As described above, in the present invention, by forming a charging potential that is intermittently intermittent on the photoconductor 10, the vibrator or the like is removed from the electrode device 5 that detects the charging potential, and this electrode is removed. The purpose is to fix the device 5, and by doing so, the structure of the electrode device 5 is simplified, and extremely high mechanical accuracy is required to improve the measurement accuracy. The productivity is improved and the measurement accuracy is improved.
【００２０】また、電極装置５に振動子など可動部分が
不要とされたことで、この可動部分の作動に伴う機械的
疲労のによる破損の発生などの問題も当然に避けられる
ものとなり、長寿命が保証できるものとなって信頼性も
格段に向上する。Further, since the electrode device 5 does not need a movable part such as a vibrator, problems such as breakage due to mechanical fatigue due to the operation of the movable part can be naturally avoided, and a long life is achieved. Can be assured, and the reliability is greatly improved.
【００２１】[0021]
【発明の効果】以上に説明したように本発明により、感
光体の感光面を回転方向に沿い周期的に断続する帯電電
位として帯電させ、固定された電極装置で前記した帯電
電位を検出する複写機感光体の劣化検出方法及び検出装
置としたことで、第一には帯電電位を検出する電極装置
から振動子など可動部分をを取除き、この電極装置を固
定することを可能とするものであり、これにより構成を
簡素化すると共に、極めて高精度な組立作業などを不要
として、劣化検出装置のコストダウンに極めて優れた効
果を奏するものである。As described above, according to the present invention, the photosensitive surface of the photoconductor is charged as a charging potential which is intermittently intermittent along the rotational direction, and the above-mentioned charging potential is detected by a fixed electrode device. With the method and the detection device for the deterioration of the photoconductor of the machine, firstly, it is possible to remove the movable part such as the vibrator from the electrode device that detects the charging potential and fix the electrode device. This simplifies the configuration and eliminates the need for extremely high-precision assembly work, which is extremely effective in reducing the cost of the deterioration detection device.
【００２２】また、第二には上記の可動部分を不要とし
たことで、この可動部分に生じる機械的疲労による破損
などの問題を解消し、この種の劣化検出装置に長寿命が
保証できるものとして信頼性の向上にも優れた効果を奏
するものである。Secondly, by eliminating the need for the movable part, problems such as damage due to mechanical fatigue occurring in the movable part can be solved, and a long life can be guaranteed for this type of deterioration detecting device. As a result, it also has an excellent effect in improving reliability.
【図１】 本発明に係る複写機感光体の劣化検出装置の
第一実施例を示す断面図である。FIG. 1 is a sectional view showing a first embodiment of a deterioration detecting device for a photoconductor of a copying machine according to the present invention.
【図２】 前記第一実施例による感光体の帯電状態を示
す説明図である。FIG. 2 is an explanatory diagram showing a charged state of the photoconductor according to the first embodiment.
【図３】 同じく本発明に係る複写機感光体の劣化検出
装置の第二実施例を示す断面図である。FIG. 3 is a sectional view showing a second embodiment of the deterioration detecting device for the photoconductor of the copying machine according to the present invention.
【図４】 前記第二実施例による感光体の帯電状態を示
す説明図である。FIG. 4 is an explanatory diagram showing a charged state of a photoconductor according to the second embodiment.
【図５】 従来例を示す断面図である。FIG. 5 is a cross-sectional view showing a conventional example.
１……劣化検出装置 ２……帯電装置 ３……高圧発生回路 ４……断続装置 ５……電極装置 ６……抵抗器 ７……増幅器 ８……光源装置 １０……感光体 1 ... Deterioration detection device 2 ... Charging device 3 ... High voltage generation circuit 4 ... Intermittent device 5 ... Electrode device 6 ... Resistor 7 ... Amplifier 8 ... Light source device 10 ... Photoconductor
Claims (4)
い周期的に断続する帯電電位として帯電させ、前記感光
面に電極を対峙させて前記感光面の回転によりこの電極
に前記帯電電位を交流電圧として出力させ、前記交流電
圧の電位により前記複写機感光体の帯電状態を測定し判
定を行うことを特徴とする複写機感光体の劣化検出方
法。1. A photosensitive body of a photoconductor of a copying machine is charged with a charging potential which is intermittently intermittent along a rotation direction, an electrode is opposed to the photosensitive surface, and the charging potential is applied to the electrode by rotation of the photosensitive surface. Is output as an AC voltage, and the charging state of the photoconductor of the copying machine is measured and judged by the potential of the AC voltage.
置と電極装置とを回転方向に沿い順次に配置し、前記帯
電装置に周期的に断続する電位を印加することで前記感
光面を周期的に断続する帯電電位で帯電させ、前記帯電
電位を前記電極装置で交流電圧として検出し、前記交流
電圧の電位により前記複写機感光体の帯電状態を測定し
所定値と比較を行うことで感光体の状態を判定すること
を特徴とする複写機感光体の劣化検出装置。2. A photoconductor surface of a photoconductor of a copying machine, wherein a charging device and an electrode device are sequentially arranged along a rotation direction, and a periodically intermittent electric potential is applied to the charging device to form the photoconductor surface. Charging with a charging potential that is intermittently intermittently detected, the charging potential is detected as an AC voltage by the electrode device, and the charging state of the photoconductor of the copying machine is measured by the potential of the AC voltage and compared with a predetermined value. An apparatus for detecting deterioration of a photoconductor of a copying machine, characterized in that the state of the photoconductor is determined by.
置と光源装置と電極装置とを回転方向に沿い順次に配置
し、前記帯電装置により一様な帯電が行われた後の前記
感光面に前記光源装置により周期的に断続する光を照射
してこの感光面の電位を周期的に断続する帯電電位と
し、前記帯電電位を前記電極装置で交流電圧として検出
し、前記交流電圧の電位により前記複写機感光体の帯電
状態を測定し所定値と比較を行うことで感光体の状態を
判定することを特徴とする複写機感光体の劣化検出装
置。3. A charging device, a light source device, and an electrode device are sequentially arranged along a rotational direction facing a photosensitive surface of a photoconductor of a copying machine, and the charging device uniformly charges the photosensitive member. The photosensitive surface is irradiated with light that is intermittently intermittently generated by the light source device, and the potential of the photosensitive surface is set as a periodically intermittently charging potential, and the charging potential is detected as an alternating voltage by the electrode device, and the alternating voltage An apparatus for detecting deterioration of a photoconductor of a copying machine, characterized in that the state of the photoconductor is judged by measuring a charged state of the photoconductor of the copying machine by an electric potential and comparing with a predetermined value.
出力を所定値とするように前記帯電装置に帰還が行われ
ていることを特徴とする請求項２又は請求項３記載の複
写機感光体の劣化検出装置。4. The copying machine according to claim 2, wherein the output of the electrode device is fed back to the charging device so that the output of the electrode device has a predetermined value. Deterioration detection device for photoconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5159940A JPH06348083A (en) | 1993-06-07 | 1993-06-07 | Method and device for detecting deterioration of photosensitive body for copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5159940A JPH06348083A (en) | 1993-06-07 | 1993-06-07 | Method and device for detecting deterioration of photosensitive body for copying machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06348083A true JPH06348083A (en) | 1994-12-22 |
Family
ID=15704487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5159940A Pending JPH06348083A (en) | 1993-06-07 | 1993-06-07 | Method and device for detecting deterioration of photosensitive body for copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06348083A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08220935A (en) * | 1995-02-20 | 1996-08-30 | Canon Inc | Method for measuring film thickness of image carrier and image forming device |
| JPH096134A (en) * | 1995-06-15 | 1997-01-10 | Nec Corp | Performance evaluating device for developing machine unit |
-
1993
- 1993-06-07 JP JP5159940A patent/JPH06348083A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08220935A (en) * | 1995-02-20 | 1996-08-30 | Canon Inc | Method for measuring film thickness of image carrier and image forming device |
| JPH096134A (en) * | 1995-06-15 | 1997-01-10 | Nec Corp | Performance evaluating device for developing machine unit |
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