JPH05188674A - Picture forming device - Google Patents
Picture forming deviceInfo
- Publication number
- JPH05188674A JPH05188674A JP3038541A JP3854191A JPH05188674A JP H05188674 A JPH05188674 A JP H05188674A JP 3038541 A JP3038541 A JP 3038541A JP 3854191 A JP3854191 A JP 3854191A JP H05188674 A JPH05188674 A JP H05188674A
- Authority
- JP
- Japan
- Prior art keywords
- photosensitive drum
- drum
- revolutions
- rotations
- sum total
- 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.)
- Pending
Links
- 239000003550 marker Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Landscapes
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、回転形の感光体ドラム
の回転数総和に基づき、該感光体ドラムの交換時期を決
める画像形成装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus which determines the replacement time of a photosensitive drum based on the total number of rotations of the photosensitive drum.
【０００２】[0002]
【従来の技術】回転形の感光体ドラムを有する画像形成
装置において、該感光体ドラムの寿命を定める手段とし
て、従来は画像形成装置のプリント枚数の総和が一定値
に達することにより、寿命終了をオペレータに知らせる
ようにしていた。2. Description of the Related Art In an image forming apparatus having a rotating type photosensitive drum, as a means for determining the life of the photosensitive drum, conventionally, the end of the life is reached by the total number of prints of the image forming apparatus reaching a constant value. I was trying to inform the operator.
【０００３】例えば、レーザープリンタでは感光体(Ｏ
ＰＣ)カウンタを備え、クリーニングユニットごとにプ
リント枚数をカウントする。そしてＯＰＣカウンタのカ
ウンタ値が予め定められた値になると、ＯＰＣマガジン
交換表示が点灯する。なお、ＯＰＣカウンタは、転写チ
ャージャーオン信号によりカウントアップするようにな
っている。For example, in a laser printer, a photoconductor (O
It is equipped with a PC) counter and counts the number of prints for each cleaning unit. When the counter value of the OPC counter reaches a predetermined value, the OPC magazine replacement display is turned on. The OPC counter counts up in response to a transfer charger ON signal.
【０００４】[0004]
【発明が解決しようとする課題】従来の感光体ドラムの
寿命検知の問題は、プリント枚数と感光体ドラムの回転
数の比率が、プリントモードによって変化するというこ
とである。A problem of conventional life detection of a photosensitive drum is that the ratio of the number of prints and the number of rotations of the photosensitive drum changes depending on the print mode.
【０００５】例えば、１回のプリント動作でプリントす
る枚数(プリントＰ／ジョブＪ＝P/J)が、１枚のとき
と、２枚のときとでは、感光体ドラムの回転数は異な
る。即ち、感光体ドラムの寸法径やプリント前工程，後
工程の機械的設置やそれらの寸法で下表のとおり細かく
変わる。For example, the number of rotations of the photosensitive drum differs depending on whether the number of sheets printed in one printing operation (print P / job J = P / J) is one or two. That is, the size and diameter of the photosensitive drum, the mechanical installation in the pre-printing process and the post-printing process, and their dimensions are finely changed as shown in the table below.
【０００６】[0006]
【表１】 [Table 1]
【０００７】つまり、１枚当りの回転数総和は、１枚時
は６回転，２枚時は4.75回転，３枚時は4.33回転とな
り、その使用速続枚数が多くなると、その時の１枚当り
の感光体ドラムの回転数は少なくなる。In other words, the total number of rotations per sheet is 6 rotations for one sheet, 4.75 rotations for two sheets, and 4.33 rotations for three sheets. The number of rotations of the photoconductor drum is reduced.
【０００８】従って、従来のように一律にプリント枚数
のみで感光体ドラムの寿命を決定すると、正しい判断が
できないという問題があった。Therefore, if the life of the photosensitive drum is uniformly determined only by the number of prints as in the conventional case, there is a problem that the correct determination cannot be made.
【０００９】本発明は、このような問題を解決し、プリ
ント枚数によらず感光体ドラムの回転数総和により正し
い寿命判断を行うことを目的とする。An object of the present invention is to solve such a problem and to make a correct life judgment based on the total number of rotations of the photosensitive drum regardless of the number of prints.
【００１０】[0010]
【課題を解決するための手段】本発明は、回転可能な感
光体ドラムの回転数を検知する手段と、前記感光体ドラ
ムの回転数を記憶する手段と、該記憶手段に記憶された
前記感光体ドラムの回転数総和が寿命を示す一定回転数
に到達したか否かを判断し、かつ到達した場合に前記感
光体ドラムの交換を促す手段と、感光体ドラムを交換後
に前記記憶手段の回転数総和を消去する手段とを有する
ことを特徴とする。SUMMARY OF THE INVENTION According to the present invention, means for detecting the rotational speed of a rotatable photoconductor drum, means for storing the rotational speed of the photoconductor drum, and the photoconductor stored in the storage means. A means for deciding whether or not the total number of rotations of the body drum has reached a certain number of rotations, which indicates the life, and a means for urging the replacement of the photosensitive drum when it reaches, and a rotation of the storage means after the replacement of the photosensitive drum. And means for erasing the total number.
【００１１】[0011]
【作用】本発明によれば、感光体ドラムの回転数を直接
に検知し、制御部により該感光体ドラムの交換時期を示
す回転数総和と比較判断し、該回転数総和に到達したと
きに感光体ドラムの交換を操作卓上に表示により促し、
かつ、前記回転数総和を操作卓上から消去しうるように
なっているので、プリント枚数により交換する従来に比
べ、正しい寿命判断を行うことができる。According to the present invention, the number of revolutions of the photosensitive drum is directly detected, and the control unit makes a judgment by comparison with the total number of revolutions indicating the replacement time of the photosensitive drum, and when the total number of revolutions is reached, Prompt the replacement of the photoconductor drum on the display,
In addition, since the total number of rotations can be erased from the operation desk, the life can be determined more accurately than in the conventional method in which the number of prints is replaced.
【００１２】[0012]
【実施例】図１は、本発明の一実施例の構成図を示し、
図１において、１は円筒状のドラム表面に一様に感光体
１Ａが塗布された感光体ドラムで、例えば、ＤＣサーボ
モータ２で回転駆動される。３は感光体ドラム１の感光
体１Ａが塗布されていない周端部分に設置された感光体
ドラムの回転数検知用のマーカで、黒又は反射性の小片
であり、感光体ドラムの円周上の任意の位置に１箇所設
けられている。４は反射型センサーで、感光体ドラム１
が回転を始めると、１周に１回、反射型センサー４をマ
ーカ３が横切ることで、回転毎の検知出力が得られる。
５は図２で後述する制御ボードで、前記ＤＣモータ２の
回転制御のほか、感光体ドラム１の回転数寿命判断，交
換表示等を行う。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of an embodiment of the present invention,
In FIG. 1, reference numeral 1 denotes a photosensitive drum having a cylindrical drum surface uniformly coated with the photosensitive member 1A, which is driven to rotate by a DC servo motor 2, for example. 3 is a marker for detecting the number of rotations of the photoconductor drum, which is provided at the peripheral end portion of the photoconductor drum 1 where the photoconductor 1A is not coated, and is a black or reflective small piece, and is on the circumference of the photoconductor drum. Is provided at any one position. 4 is a reflection type sensor, which is the photosensitive drum 1.
When the rotation starts, the marker 3 crosses the reflection type sensor 4 once per revolution, and thus a detection output for each rotation is obtained.
Reference numeral 5 denotes a control board which will be described later with reference to FIG.
【００１３】図２に示す制御ボードにおいて、本発明に
直接関係する部分のみをまず説明すると、制御部を構成
するμＣＰＵ50はＲＯＭ51に格納されているプログラム
に従い画像形成装置全体のプリント動作を制御するもの
であるが、本発明においては、更に感光体ドラム１の回
転数の総和から交換時期を判断し、オペレータ操作卓６
に交換時期を促す表示信号の出力制御を行う。52は不揮
発性メモリーＲＡＭで、反射型センサー４で検知した感
光体ドラムの回転数を記憶し、感光体ドラム交換後は、
オペレータ操作卓６のスイッチにより消去され、初めか
らの回転数を記憶する。In the control board shown in FIG. 2, only the portion directly related to the present invention will be described. The μCPU 50 constituting the control portion controls the printing operation of the entire image forming apparatus according to the program stored in the ROM 51. However, in the present invention, the operator's console 6 is used to determine the replacement time from the total number of rotations of the photosensitive drum 1.
Control the output of the display signal that prompts the replacement time. 52 is a non-volatile memory RAM, which stores the number of rotations of the photosensitive drum detected by the reflective sensor 4, and after replacement of the photosensitive drum,
It is erased by a switch on the operator console 6, and the number of revolutions from the beginning is stored.
【００１４】なお、本制御ボード５内にはアドレスデコ
ーダ53，ＬＤドライブ回路７を制御するゲートアレー
(光書込み回路)54Ａ，ＬＤ周辺回路54Ｂ，前記オペレー
タ操作卓６，ビデオインターフェース８と関係するプリ
ント入出力タイマー55Ａ，オペレータ操作ドライバ回路
55Ｂ，ビデオインターフェース55Ｃ，また、前記ＤＣサ
ーボモータ２を含む画像形成に必要な各モータ，センサ
ー，ソレノイド等の各部材ユニット９への入出力を行う
プリント入出力制御回路56Ａ，ドライバーセンサー回路
56Ｂ等を備え、各ユニットはアドレスバス(ＡＤＲＢＵ
Ｓ)，データバス(ＤＡＴＡＢＵＳ)で結合されている。The control board 5 includes a gate array for controlling the address decoder 53 and the LD drive circuit 7.
(Optical writing circuit) 54A, LD peripheral circuit 54B, the operator console 6, the print input / output timer 55A related to the video interface 8, the operator operating driver circuit
55B, a video interface 55C, a print input / output control circuit 56A for performing input / output to / from each member unit 9 such as each motor, sensor, solenoid, etc. necessary for image formation including the DC servo motor 2, driver sensor circuit
Each unit has an address bus (ADRBU).
S) and a data bus (DATABUS).
【００１５】次に本発明の部分についての実施例の動作
を説明すると、感光体ドラム１の回転数は、マーカ３が
反射型センサー４を横切るごとに１回検知信号がドライ
バーセンサ回路56Ｂ，プリント入出力制御回路56Ａを経
て不揮発性メモリーＲＡＭ52に書込まれ、感光体ドラム
１の回転数総和が記憶される。Next, the operation of the embodiment of the present invention will be described. As for the number of rotations of the photosensitive drum 1, a detection signal is output once every time the marker 3 crosses the reflection type sensor 4, and the driver sensor circuit 56B prints. It is written in the nonvolatile memory RAM 52 via the input / output control circuit 56A, and the total number of rotations of the photosensitive drum 1 is stored.
【００１６】μＣＰＵ50は不揮発性メモリーＲＡＭ52に
記憶された感光体ドラム１の回転数総和から該感光体ド
ラムの寿命回転数となったことを判断すると、オペレー
タ操作卓６の表示パネル(図略)に感光体ドラム１の交換
を促す表示を行う。When the μCPU 50 determines from the total number of rotations of the photosensitive drum 1 stored in the non-volatile memory RAM 52 that the lifetime of the photosensitive drum has been reached, the μCPU 50 displays on the display panel (not shown) of the operator console 6. A display prompting replacement of the photosensitive drum 1 is displayed.
【００１７】これにより、感光体ドラム１を交換すると
ともに、オペレータ操作卓６上に設定されたスイッチを
操作して、オペレータ操作ドライバ回路55Ｂ，プリント
入出力タイマー55Ａを経て不揮発性メモリーＲＡＭの記
憶を消去し、初めから感光体ドラムの回転数を記憶させ
るようにする。As a result, the photosensitive drum 1 is replaced and the switch set on the operator console 6 is operated to store the data in the nonvolatile memory RAM through the operator operation driver circuit 55B and the print input / output timer 55A. It is erased and the number of rotations of the photosensitive drum is stored from the beginning.
【００１８】[0018]
【発明の効果】以上説明したように本発明の画像形成装
置は、感光体ドラムの回転数総和によって、その交換時
期を決定し、表示するようにしたので、プリント枚数に
よる従来の場合に比べて正しく行うことができる。As described above, in the image forming apparatus of the present invention, the replacement time is determined and displayed based on the total number of rotations of the photosensitive drum, so that the number of prints is different from the conventional case. You can do it right.
【図１】本発明の一実施例の構成図である。FIG. 1 is a configuration diagram of an embodiment of the present invention.
【図２】図１の制御ボードの構成を示す図である。FIG. 2 is a diagram showing a configuration of a control board shown in FIG.
１…感光体ドラム、 ２…ＤＣサーボモータ、 ３…マ
ーカ、 ４…反射型センサー、 ５…制御ボード、 ６
…オペレータ操作卓、 50…制御部(μＣＰＵ)、51…Ｒ
ＯＭ、 52…不揮発性メモリー(ＲＡＭ)。1 ... Photosensitive drum, 2 ... DC servo motor, 3 ... Marker, 4 ... Reflective sensor, 5 ... Control board, 6
… Operator console, 50… Control unit (μCPU), 51… R
OM, 52 ... Non-volatile memory (RAM).
Claims (1)
する手段と、前記感光体ドラムの回転数を記憶する手段
と、該記憶手段に記憶された前記感光体ドラムの回転数
総和が寿命を示す一定回転数に到達したか否かを判断
し、かつ到達した場合に前記感光体ドラムの交換を促す
手段と、感光体ドラムを交換後に前記記憶手段の回転数
総和を消去する手段とを有することを特徴とする画像形
成装置。1. A means for detecting the rotational speed of a rotatable photosensitive drum, a means for storing the rotational speed of the photosensitive drum, and a total rotational speed of the photosensitive drum stored in the storage means is a life. Means for deciding whether or not the rotation speed reaches a constant rotation speed and urging the replacement of the photosensitive drum when the rotation speed is reached, and means for erasing the total rotation speed of the storage means after the replacement of the photosensitive drum. An image forming apparatus having.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3038541A JPH05188674A (en) | 1991-03-05 | 1991-03-05 | Picture forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3038541A JPH05188674A (en) | 1991-03-05 | 1991-03-05 | Picture forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05188674A true JPH05188674A (en) | 1993-07-30 |
Family
ID=12528147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3038541A Pending JPH05188674A (en) | 1991-03-05 | 1991-03-05 | Picture forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05188674A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5835818A (en) * | 1995-12-26 | 1998-11-10 | Canon Kasbushiki Kaisha | Service life informing device for charged member, informing method thereof, process cartridge and image forming apparatus |
| US6549733B2 (en) | 2001-01-15 | 2003-04-15 | Canon Kabushiki Kaisha | Image forming apparatus, image bearing member life detecting method, and process cartridge detachably attachable to image forming apparatus |
| US6577823B2 (en) | 2000-06-15 | 2003-06-10 | Canon Kabushiki Kaisha | Method of detecting life of image bearing member, image forming apparatus and cartridge |
| JP2008225009A (en) * | 2007-03-12 | 2008-09-25 | Ricoh Co Ltd | Image forming apparatus |
| JP2012141369A (en) * | 2010-12-28 | 2012-07-26 | Fuji Xerox Co Ltd | Image forming apparatus and consumable management system |
| JP2019086657A (en) * | 2017-11-07 | 2019-06-06 | コニカミノルタ株式会社 | Image forming apparatus, calculation method, and calculation program |
| US10613464B2 (en) | 2017-10-19 | 2020-04-07 | Konica Minolta, Inc. | Image forming apparatus determining a film scraping amount of a photoreceptor, method and program for controlling the apparatus |
-
1991
- 1991-03-05 JP JP3038541A patent/JPH05188674A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5835818A (en) * | 1995-12-26 | 1998-11-10 | Canon Kasbushiki Kaisha | Service life informing device for charged member, informing method thereof, process cartridge and image forming apparatus |
| US6577823B2 (en) | 2000-06-15 | 2003-06-10 | Canon Kabushiki Kaisha | Method of detecting life of image bearing member, image forming apparatus and cartridge |
| US6704524B2 (en) | 2000-06-15 | 2004-03-09 | Canon Kabushiki Kaisha | Method of detecting life of image bearing member, image forming apparatus and cartridge |
| US6961527B2 (en) | 2000-06-15 | 2005-11-01 | Canon Kabushiki Kaisha | Method of detecting life of image bearing member, image forming apparatus and cartridge |
| US6549733B2 (en) | 2001-01-15 | 2003-04-15 | Canon Kabushiki Kaisha | Image forming apparatus, image bearing member life detecting method, and process cartridge detachably attachable to image forming apparatus |
| US6654568B2 (en) | 2001-01-15 | 2003-11-25 | Canon Kabushiki Kaisha | Image forming apparatus, image bearing member life detecting method, and process cartridge detachably attachable to image forming apparatus |
| JP2008225009A (en) * | 2007-03-12 | 2008-09-25 | Ricoh Co Ltd | Image forming apparatus |
| JP2012141369A (en) * | 2010-12-28 | 2012-07-26 | Fuji Xerox Co Ltd | Image forming apparatus and consumable management system |
| US8718494B2 (en) | 2010-12-28 | 2014-05-06 | Fuji Xerox Co., Ltd. | Image forming apparatus and consumable supply management system |
| US10613464B2 (en) | 2017-10-19 | 2020-04-07 | Konica Minolta, Inc. | Image forming apparatus determining a film scraping amount of a photoreceptor, method and program for controlling the apparatus |
| JP2019086657A (en) * | 2017-11-07 | 2019-06-06 | コニカミノルタ株式会社 | Image forming apparatus, calculation method, and calculation program |
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