JPS62239175A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPS62239175A JPS62239175A JP61083705A JP8370586A JPS62239175A JP S62239175 A JPS62239175 A JP S62239175A JP 61083705 A JP61083705 A JP 61083705A JP 8370586 A JP8370586 A JP 8370586A JP S62239175 A JPS62239175 A JP S62239175A
- Authority
- JP
- Japan
- Prior art keywords
- conductive
- photoreceptor
- brush
- image
- timing
- 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
- 230000007257 malfunction Effects 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 108091008695 photoreceptors Proteins 0.000 description 45
- 238000001514 detection method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 10
- 238000012546 transfer Methods 0.000 description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 7
- 229910052709 silver Inorganic materials 0.000 description 7
- 239000004332 silver Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 238000005304 joining Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 238000001454 recorded image Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000011669 selenium Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- WUPHOULIZUERAE-UHFFFAOYSA-N 3-(oxolan-2-yl)propanoic acid Chemical compound OC(=O)CCC1CCCO1 WUPHOULIZUERAE-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 229910052980 cadmium sulfide Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005323 electroforming Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Photoreceptors In Electrophotography (AREA)
- Combination Of More Than One Step In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、静電記録、静電印刷、電子写真等画像形成装
置に用いられる無端ベルト状像担持体の画像記録開始の
ためのタイミング制御の改良に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to timing control for starting image recording on an endless belt-like image carrier used in image forming apparatuses such as electrostatic recording, electrostatic printing, and electrophotography. Regarding improvements.
従来静電気を利用して像形成を行なうための像担持体と
しては、誘電体層または感光層等の像形成層を金属ドラ
ム上に設けたもの、または導電層を有するシート状基体
に像形成層を設け、シート状のまま使用するか、さらに
両端を接合して無端ベルト状として使用するもの等があ
る。Conventional image carriers for forming images using static electricity include those in which an image forming layer such as a dielectric layer or a photosensitive layer is provided on a metal drum, or those in which an image forming layer is provided on a sheet-like substrate having a conductive layer. There are those that are provided with a sheet and used as is, or that are used as an endless belt by joining both ends.
本発明は、後者のシート状像支持体の両端面を接合して
成る無端ベルト状像担荷体に関する。かかる無端ベルト
成像担持体においては、前記両端面の接合方法が像担持
体の加工性、性能およびコスト等に影響するため、従来
種々の改良がなされている。像担持体として普通用いら
れるものは感光体である。例えばプラスティックフィル
ムを基体とする有機半導体を用いた感光体においては、
超音波融着法が用いられ、金属薄板全基体とし酸化亜鉛
、硫化カドミウム等の樹脂分散層、有機半導体層、セレ
ン蒸着層等を設けた感光体においては、溶接研磨法また
はニッケル電鋳法等が用いられている。しかし、この接
合部は画像形成することができないため、画像域が接合
部を含壕ないように書き出しタイミングを制御する必要
がある。The present invention relates to an endless belt-like image carrier formed by joining both end surfaces of the latter sheet-like image carrier. In such an endless belt image carrier, the method of joining the two end faces affects the workability, performance, cost, etc. of the image carrier, so various improvements have been made in the past. A commonly used image carrier is a photoreceptor. For example, in a photoreceptor using an organic semiconductor based on a plastic film,
For photoreceptors in which the ultrasonic fusion method is used and the entire base is made of a thin metal sheet with a resin dispersed layer such as zinc oxide or cadmium sulfide, an organic semiconductor layer, a selenium vapor deposition layer, etc., welding polishing method or nickel electroforming method etc. is used. However, since an image cannot be formed at this joint, it is necessary to control the writing timing so that the image area does not include the joint.
これを行うため、例えば特開昭５０−６２６４４号公報
に記載されている無端ベルト状像支持体の側縁に複数個
の離間されたタイミングマークを形成し、該マークをセ
ンサーにより検出カウントし、このカウント数に従って
複写装置の像形成機器の動作を選択的に制御するように
している。In order to do this, for example, a plurality of spaced apart timing marks are formed on the side edge of an endless belt-like image support described in Japanese Patent Application Laid-Open No. 50-62644, and the marks are detected and counted by a sensor. The operation of the image forming device of the copying apparatus is selectively controlled according to this count number.
しかしながらかかる従来技術においては、用いられる像
担持体の側縁に極めて多数の精密なタイミングマークを
形成する必要があるため、像支持体の加工が複雑かつコ
ストアップとなるなどの問題があった。However, in this conventional technique, since it is necessary to form an extremely large number of precise timing marks on the side edges of the image carrier used, there are problems such as complicated processing of the image carrier and increased cost.
マタマークを検知するセンサーはフォトセンサーが用い
られ、マークとマークでない部分とを反射率又は透過率
の違いにより検知する方式のため、特に電子写真の場合
、トナーが飛散するので、感光体上のマークやフォトセ
ンサー上にトナーが付着し、よごれが発生することにょ
シ検知ができなくなったり誤動作をしだすという問題点
もあった。The sensor that detects the mark is a photo sensor, which detects the mark and the non-mark area based on the difference in reflectance or transmittance. Especially in the case of electrophotography, toner scatters, so the mark on the photoreceptor is There was also the problem that toner would adhere to the photosensor and cause dirt, which could cause detection to fail or malfunction.
従って本発明はこのような問題点を解決し簡単確実な構
造で汚れによって誤動作をすることなく、正確な同期タ
イミングによる画像形成と転写のための給紙搬送が得ら
れる無端状ベルト式感光体を有する画像形成装置を提供
することを目的とする。Therefore, the present invention solves these problems and provides an endless belt type photoreceptor that has a simple and reliable structure, does not malfunction due to dirt, and can feed and transport paper for image formation and transfer with accurate synchronization timing. An object of the present invention is to provide an image forming apparatus having the following features.
この目的は、支持体上に導電層及び感光層を有する帯状
体の両端を接合して無端状とし、前記接合部に対し直角
な方向に移動できるようにしだ像担持体で、画像記録域
外の外周側縁部の全周にわたり導電部分と非導電部分よ
りなる摺動面を設け、更に前記摺動面に摺接する導電性
摺動部材を画像記録装置本体に設けて該摺動部材が前記
摺動面の導電部分に摺接しているか非導電部分に摺接し
ているを電気的に検知して、画像記録開始のタイミング
を制御することを特徴とした画像形成装置によって達成
される。The purpose of this is to create an endless image carrier by joining both ends of a strip having a conductive layer and a photosensitive layer on a support so that it can move in a direction perpendicular to the joined part. A sliding surface consisting of a conductive portion and a non-conductive portion is provided over the entire circumference of the outer peripheral edge, and a conductive sliding member that slides in contact with the sliding surface is provided on the main body of the image recording apparatus, so that the sliding member This is achieved by an image forming apparatus characterized in that the timing of starting image recording is controlled by electrically detecting whether the moving surface is in sliding contact with a conductive portion or a non-conductive portion.
本発明の一実施例について説明する。第１図て示す実施
例は自動的な記録用紙供給装置と手動的な記録用紙供給
装置とを画像形成装置の給紙部に対し交換可能に取付は
得るようＫしたもので、図示しない半導体レーザー駆動
回路から出たレーザービームは、途中整形されて前記装
置内の光学系１０のポリゴン１１に入射し該ポリゴン１
１のミラー表面で反射されｆθレンズ１２、シリンドリ
カルレンズ１３およびミラー１４を経て像担持体である
感光体加の周面に投光される。An embodiment of the present invention will be described. The embodiment shown in FIG. 1 is designed so that an automatic recording paper feeding device and a manual recording paper feeding device can be attached interchangeably to the paper feeding section of an image forming apparatus. The laser beam emitted from the drive circuit is shaped on the way and enters the polygon 11 of the optical system 10 in the device, and the laser beam enters the polygon 11 of the optical system 10 in the device.
The light is reflected by the surface of the mirror 1, passes through the fθ lens 12, the cylindrical lens 13, and the mirror 14, and is projected onto the circumferential surface of the photoreceptor, which is an image carrier.
前記感光体２０は、有端のベルトを端面において接合し
た無端状感光体であって３本の感光体支持ロー２２１、
四、おによって搬送台２４の上面を反時計方向に回転、
搬送されるようになっていて、前場ってその周面上に帯
電転写極５にょシミ荷を与えられているので前述したレ
ーザービームの投光を受けることによシ静電気的信号に
よる静電潜像を形成するようになっている。The photoreceptor 20 is an endless photoreceptor formed by joining belts with ends at their end surfaces, and includes three photoreceptor support rows 221;
4. Rotate the top surface of the conveyor table 24 counterclockwise,
Since the charged transfer electrode 5 is given a stain charge on its circumferential surface, the electrostatic latent caused by the electrostatic signal is removed by receiving the laser beam as described above. It is designed to form an image.
続いて前記感光体２０は、現像器の現像ローラ２６によ
ってトナーを供給されて周面上の静電潜像をトナー像と
化し前記搬送台２４の下方に回シ、反時計方向に搬送さ
れるが、一方、これに並行してこの画像形成装置に取付
は連動した自動給紙装置３゜からは装置本体とは別の駆
動力にょる給紙ローラ３１の作動によって記録紙が１枚
宛装置内に搬入され、その先端を検知した本装置の第１
の検知手段であるセンサ４１の作用によって給紙手段で
ある第２給紙ローラ４０が回転を始めて記録紙をさらに
送り込み、その先端を再度検知した第２の検知手段のセ
ンサ４２の作用によって前記第２給紙ローラ１１゜が停
止され、前述したトナー像とのタイミングが調整された
あと回転が再開されて記録紙の搬送が継続されるように
なっている。なお感光体支持ローラ２１，２２、乙を回
転させる装置本体の動力源Ｍから電磁クラッチＣ等の切
替手段を介して前記の第２給紙ローラ・１０は回転する
ようになっていて、第２給紙ロー２４０の始動のタイミ
ングはＣＰＵからの電磁クラッチＣｆ、ＯＮする信号に
よってなされる。Subsequently, the photoreceptor 20 is supplied with toner by a developing roller 26 of a developing device, converts the electrostatic latent image on the peripheral surface into a toner image, and is rotated and conveyed counterclockwise below the conveyance table 24. However, in parallel with this, the automatic paper feeder 3° attached to the image forming apparatus is operated by a paper feed roller 31 driven by a driving force separate from the main body of the apparatus, and one sheet of recording paper is fed to the apparatus. The first part of this device, whose tip was detected
The second paper feed roller 40, which is a paper feeding means, starts to rotate by the action of the sensor 41, which is a detection means, to further feed the recording paper, and the sensor 42, which is a second detection means, which detects the leading edge again, starts rotating the second paper feed roller 40, which is a paper feeding means. The second paper feed roller 11° is stopped, and after the timing with the toner image described above is adjusted, rotation is resumed to continue conveying the recording paper. Note that the second paper feed roller 10 is configured to rotate from a power source M of the main body of the apparatus that rotates the photoreceptor support rollers 21, 22 and B via a switching means such as an electromagnetic clutch C. The timing for starting the paper feed row 240 is determined by a signal from the CPU that turns on the electromagnetic clutch Cf.
またもし、所定の時間内にセンサ４２が検知しなかった
とき、給送不能とし画像形成プロセスは行なわずジャム
を表示して機械をストップさせる。If the sensor 42 does not detect it within a predetermined time, it is determined that feeding is disabled and the image forming process is not performed, a jam is displayed and the machine is stopped.
又第１図に示す検知の手段としてはマイクロスインチ、
光センサー等が用いられＣＰＵに入力され制御される。In addition, as the detection means shown in Fig. 1, microsinch,
A light sensor or the like is used to input and control the CPU.
かくして記録紙を一体とした前記感光体Ｉは、前記帯電
転写極δにおいてそのトナー像を記録紙に転写して記録
紙を分離し、レーザービームの全面露光を受けて除電し
たあと残留トナーを先ず補助清掃手段ｎによって付着力
を弱め次いで前記現像ロー２２６のもつクリーニング作
用によって取除くようになっている。なお前記補助清掃
手段ｎは絶縁性繊維から成るブラシ様の装置あるいは弾
性部材の薄板で、先行したサイクルにおいて形成される
静電潜像の電位に同等支障を及ぼさない形式のものとな
っている。勿論補助清掃手段ｎは現像時には感光体銀か
ら退避し、りＩＪ−ユング時には感光体銀に摺接するよ
うにしてもよい。In this way, the photoreceptor I integrated with the recording paper transfers the toner image onto the recording paper at the charged transfer pole δ, separates the recording paper, and removes the remaining toner by first exposing the entire surface to a laser beam to eliminate the charge. The adhesion force is weakened by the auxiliary cleaning means n, and then the cleaning action of the developing row 226 removes the toner. The auxiliary cleaning means n is a brush-like device made of insulating fibers or a thin plate of an elastic member, and is of a type that does not affect the potential of the electrostatic latent image formed in the previous cycle. Of course, the auxiliary cleaning means n may be retracted from the photoreceptor silver during development, and may be brought into sliding contact with the photoreceptor silver during IJ-Jung.
かくして前記感光体２０は再び前記帯電転写極５におい
て電荷を与えられ新たな静電画像を形成するべく次なる
回転、搬送のサイクルに移るが、一方ではその間にトナ
ー像の転写を受けた記録紙は前記感光体支持ローラ２１
において感光体２０の周面から剥離され、定着ローラ５
０においてトナーを溶融固着したあと分離爪５１によっ
て分離され排紙ローラ５２に導かれて除電ブラシ５３に
よって残留電位を除かれ装置外へと排出される。In this way, the photoreceptor 20 is charged again at the charged transfer pole 5 and moves on to the next rotation and conveyance cycle to form a new electrostatic image, but at the same time the recording paper to which the toner image has been transferred is is the photoreceptor support roller 21
It is peeled off from the circumferential surface of the photoreceptor 20 and fixed onto the fixing roller 5.
After the toner is melted and fixed at 0, the toner is separated by a separating claw 51, guided to a discharge roller 52, residual potential is removed by a static elimination brush 53, and discharged to the outside of the apparatus.
感光体銀は無端ベルト状をなしているが有端で、ベース
は可撓性の樹脂フィルム又は金属フィルムが用いられ、
粘着テープ等を用いての接着あるいは融着等により接続
しエンドレスとしている。この無端状ベルトは樹脂ベー
スの場合にはベース上に導電層を設けたのち、表面にｏ
ｐｃやＳｅ等の感光材料を塗布あるいは蒸着等によって
設けている。The silver photoreceptor is in the shape of an endless belt, but it has ends, and the base is made of a flexible resin film or metal film.
They are connected by adhesion or fusion using adhesive tape or the like, making them endless. If this endless belt is resin-based, a conductive layer is provided on the base, and then an ozone layer is placed on the surface.
A photosensitive material such as PC or Se is provided by coating or vapor deposition.
感光体銀は無端状をなしているが、ベースの接合部では
良好な静電潜像を得ることはできない。Although the silver photoreceptor has an endless shape, a good electrostatic latent image cannot be obtained at the joint of the base.
よって本発明による記録紙とトナー像との間で得られる
同期についてもトナー像は感光体器上で接合部をまたい
で形成されていてはならない。Therefore, with regard to the synchronization obtained between the recording paper and the toner image according to the present invention, the toner image must not be formed across the joint on the photoreceptor.
このような関係をどのように処理しているかについて、
以下に説明する。How do you handle such relationships?
This will be explained below.
第２図は第１図の感光体まわりの部分を一部抜きだした
図である。この図において、Ａは感光体２０の継目を検
出器６３で検知する位置、Ｂは帯電転写極δで帯電転写
する位置、Ｃは感光体銀への像記録位置、Ｄは現像位置
、ＰけＡに感光体の継目があるときの感光体上の画像記
録開始位置、Ｅはセンサー４２の検知による記録紙先端
の停止待機位置、ｐ／はＥにて先端が待機中の記録紙の
搬送開始時における感光体上の記録画像（トナー像）の
先頭位置Ａ′はそのときの感光体の継目位置である。FIG. 2 is a partially extracted view of the area around the photoreceptor in FIG. 1. In this figure, A is the position where the detector 63 detects the seam of the photoreceptor 20, B is the position where the charged transfer pole δ charges and transfers, C is the image recording position on the photoreceptor silver, D is the development position, and P is the position where the joint is detected by the detector 63. A is the image recording start position on the photoconductor when there is a seam on the photoconductor, E is the stop waiting position of the leading edge of the recording paper as detected by the sensor 42, and p/ is the start of conveyance of the recording paper with the leading edge waiting at E. The leading position A' of the recorded image (toner image) on the photoreceptor at that time is the joint position of the photoreceptor at that time.
更に感光体の継目部分の長さΔＬを除いた有効長さをＬ
、記録画像の長さ１ｒ：ｌ、感光体上でのＡＢ間長さを
ｘ、、ｎｃ間良さを１２、ＣＤ間長さを！５、ＤＡ’間
長さをＪ４． Ａ’Ａ間の長さを／、、ＥＡ間の長さ
もはソその１５、ＰＡ間及びｐ／ Ａ／間長さを△Ｌ、
Ｌ−ΔＩ≧ｌとし、帯電、像露光記録、現像、転写のた
めの記録紙搬送の各開始時期をきめればよい。Furthermore, the effective length excluding the length ΔL of the joint part of the photoreceptor is L.
, the length of the recorded image is 1r:l, the length between AB on the photoreceptor is x, the quality between nc is 12, and the length between CD is ! 5. Set the length between DA' to J4. The length between A'A is /, the length between EA is 15, the length between PA and p/A/ is △L,
It is sufficient to set L-ΔI≧l and determine the respective start times of recording paper conveyance for charging, image exposure recording, development, and transfer.
本実施例ではＡにおける継目検出時刻を０とし、□、現
像開始時刻、３をｌ・＋！・＋！・＋△Ｌ、１３、 ＋
６２＋ΔＬ
■
ｖ感光体が一周する時刻ｔ、をｘ＋ ＋／
１−１． ＋１４ ＋１５Ｌ十乱−■
にとりである。こ＼ＫＶは感光体及び記録紙の速度であ
る。又Δには記録紙の端部から記録開始位置までの余白
長さともみなせる。In this example, the seam detection time at A is 0, and □, the development start time, and 3 are l.+!・+!・+△L, 13, +
62+ΔL ■
v The time t when the photoconductor goes around once is x+ +/
1-1. +14 +15L Juran-■ It's Nitori. KV is the speed of the photoreceptor and recording paper. Δ can also be regarded as the margin length from the end of the recording paper to the recording start position.
このようにすれば、各プロセスのタイミングは第３図に
示す線図のようになり、感光体器上の継ぎ目をまたいで
トナーｆ象ができることはなくなる。If this is done, the timing of each process will be as shown in the diagram shown in FIG. 3, and the toner image will not be generated across the seam on the photoreceptor.
つぎに本発明の継目検出手段について説明する。Next, the seam detection means of the present invention will be explained.
第４図は感光体銀の継目検出手段の概略図である。FIG. 4 is a schematic diagram of a photoreceptor silver seam detection means.
１１’７動面印は感光体銀の全周にわたりその側縁部の
非画像域に設けられ該摺動面の導電部分６１は感光体基
体の導体層と電気的に導通させである。感光体基体及び
導電部分６１は導電性ブラフ６４により常にアース電位
に保たれている。The sliding surface mark 11'7 is provided in the non-image area at the side edge of the silver photoreceptor over the entire circumference, and the conductive portion 61 of the sliding surface is electrically connected to the conductor layer of the photoreceptor base. The photoreceptor substrate and conductive portion 61 are always kept at ground potential by a conductive bluff 64.
導電性ブラシ６３は第４図に示す回路と接合してお９８
点の電位は導電性ブラシ６３が導電部分６Ｉに摺接して
いるときＬｏｗ 、前記摺動面■の非導電部分［ｉ２
Ｋ摺接しているときＨｉｇｈとなる。この信号を波形整
形あるいはノイズカットし’、ＣＰｔＪＫ入力信号とし
て与える。The conductive brush 63 is connected to the circuit shown in FIG.
The potential at the point is Low when the conductive brush 63 is in sliding contact with the conductive portion 6I, and the potential at the point is Low when the conductive brush 63 is in sliding contact with the conductive portion 6I;
It becomes High when K is in sliding contact. This signal is waveform-shaped or noise-cut and provided as a CPtJK input signal.
ところで感光体の基体はアルミニウム合金か或いはプラ
スチックの上に金属膜を蒸着するかメッキをしたものが
用いられ、基体はアースされて使われている。そしてこ
のような基体の導電層の上に感光層が非導電層として塗
布又は蒸着されている。今回の継目検出導電部分は感光
体側縁部において前述の感光層の塗布しない部分をのこ
し基体の部分で導体層を形成させることができるし、こ
れが導電ブラシの摺接によって損傷される心配があるな
らその部分に金属粉やカーボンを分散させた導電性塗料
を塗って導電部分６１を形成させることができる。又、
非導電部分６２のところは、導電部分６１の上から絶縁
テープを貼って固着するか、感光層など高抵抗物質が表
面に露出していればよい。By the way, the base of the photoreceptor is made of aluminum alloy or plastic with a metal film deposited or plated on it, and the base is grounded. A photosensitive layer is coated or deposited as a non-conductive layer on the conductive layer of such a substrate. The seam detection conductive part of this time can leave the part where the photosensitive layer is not coated on the side edge of the photoreceptor and form a conductive layer on the base part, and if there is a concern that this will be damaged by sliding contact with the conductive brush, The conductive portion 61 can be formed by applying a conductive paint containing metal powder or carbon dispersed therein. or,
The non-conductive portion 62 may be fixed by pasting an insulating tape over the conductive portion 61, or a high-resistance material such as a photosensitive layer may be exposed on the surface.
と＼で導電性ブラシ６３は、導電部分６１に接している
ときは、感光体基体と導通、非導電部分６２に接してい
るときは非導通でなければならない。したがって第５図
に示すように非導電部分６２の切欠き部に導電ブラシ６
３が摺接したときは、導電部分６１との接触が絶たれて
いる必要がある。そのため部にふれないようＫする。When the conductive brush 63 is in contact with the conductive portion 61, it must be electrically conductive with the photoreceptor substrate, and when it is in contact with the non-conductive portion 62, it must be non-conductive. Therefore, as shown in FIG.
3 is in sliding contact, the contact with the conductive portion 61 must be broken. Therefore, I ask you not to touch the club.
又導電性ブラシ６４は感光体基体を常にアース電位に保
つのが役目であるから常に導電部分６１と接していなけ
ればならない。即ち、導電性ブラシ６４が非導電部分６
２の切り欠き部と接していても同時に導電部分６１と接
していなければならない。したがって導電ブラシーのブ
ラシ幅ｓ２は非導電部分６２の切欠き幅ｍより充分大き
くしである。The conductive brush 64 must always be in contact with the conductive portion 61 because its role is to keep the photoreceptor substrate at ground potential. That is, the conductive brush 64 is connected to the non-conductive portion 6.
Even if it is in contact with the notch 2, it must be in contact with the conductive portion 61 at the same time. Therefore, the brush width s2 of the conductive brush is sufficiently larger than the notch width m of the non-conductive portion 62.
一方、第６図は摺動面間を感光体加の両側の側縁部に設
けた例である。その構成で片側は導電部分６１の途中で
非導電部分６２の切欠きを設けこれは専らタイミング制
御に用いている。又反対側の摺動面６０の導電部分６５
は全周にわたりエンドレスに設けられておシ、導電性ブ
ラシーは常にこれに接している。導電部分６１．６５は
感光体の基体と電気的に接続されている。この場合、導
電性ブラシ６３のブラシ幅Ｓ１は非導電部分６２の切欠
き幅ｍより小さくしであるのは、第５図の場合と同様で
あるが導電性ブラシ６４のプラン幅Ｓ２は第５図の場合
とは異なシ特に制限する必要はない。On the other hand, FIG. 6 shows an example in which the sliding surfaces are provided at the side edges on both sides of the photoreceptor. In this configuration, one side has a notch for a non-conductive part 62 in the middle of a conductive part 61, and this is used exclusively for timing control. Also, the conductive portion 65 of the sliding surface 60 on the opposite side
is provided endlessly around the entire circumference, and the conductive brush is always in contact with it. The conductive portions 61.65 are electrically connected to the photoreceptor substrate. In this case, the brush width S1 of the conductive brush 63 is smaller than the notch width m of the non-conductive portion 62, as in the case of FIG. Unlike the case shown in the figure, there is no need for any particular restrictions.
尚導電性ブラシのかわりに第７図のように板材の接片６
３′、本番を適用することももちろん可能である。Note that instead of the conductive brush, a plate contact piece 6 is used as shown in Fig. 7.
3', it is of course possible to apply the actual version.
このようにして、エンドレスの感光体の継ぎ目が特定の
位置（本実施例のＡ位置）にきたときを検出しその時点
からパルスカウンターを働かせ置を通過した後７秒後に
露光を開始し、しかも記録画像の長さｌを感光体の有効
長さＬからΔＬをひいた長さ以下にとっであるので、感
光体の継目に記録画像が記録されることが回避される。In this way, it is detected when the seam of the endless photoreceptor reaches a specific position (position A in this embodiment), and from that point on, the pulse counter is activated to start exposure 7 seconds after passing the position. Since the length l of the recorded image is set to be equal to or less than the effective length L of the photoreceptor minus ΔL, it is avoided that the recorded image is recorded on the joint of the photoreceptor.
尚本実施例では、摺動面間の非導電部分６２と感光体２
０の継ぎ目を一致させであるが、これは導電性ブラシ６
３、Ｅｙｌの設定位置によって変るもので、一般的には
一致しなくてよいが、本実施例ではわかり昌（寸７．ｆ
ｒめに画去を一待くオイ讐υ日日１杏〔発明の効果〕
本発明によりベルト状無端状の感光体の継ぎ目の部分は
光学的なセンサーによって検出されるのでなく直接プラ
ン又は金属板の導体同志の接触によって検出されるので
、又トナーがブラシまたは導電層に付着しても相互にこ
すれ除去されるのでトナーのよごれによる誤動作のおこ
る懸念もなくなり、しかも比較的簡単な装置で検出が可
能なので品質上の信頼感とともに低コストで製作ができ
るようになった。In this embodiment, the non-conductive portion 62 between the sliding surfaces and the photoreceptor 2
0, but this is the conductive brush 6
3. It changes depending on the setting position of Eyl, and generally they do not have to match, but in this example, it is
[Effects of the Invention] According to the present invention, the joints of the belt-like endless photoreceptor are not detected by an optical sensor, but are directly detected by a planar or metal sensor. Since it is detected by contact between the conductors of the plates, and even if toner adheres to the brush or the conductive layer, it is removed by rubbing against each other, so there is no need to worry about malfunctions due to toner contamination.Furthermore, it is detected by a relatively simple device. This makes it possible to manufacture products at low cost and with high reliability in terms of quality.
第１図は本発明の１実施例の全体概要図、第２図はその
感光体まわりの部分図、第３図は該実施例の各プロセス
の概略タイミング線図、第４図は感光体の継目検出手段
の概要図、第５図は非導電部分の長さと、導電ブラシ幅
の関係図、第６図は、感光体の他の継目検出手段の概要
図、第７図は導電性ブラシにかわる接片を用いたときの
概要図である。
１０・・・−＃学系 加・・・感弄体（像担持体
）２１．２２，２３・・・感光体支持ローラ５・・・帯
電転写極
２６・・・現像ローラ（クリーニングローラも兼ねる）
、１０・・・第２給紙ローラ ４Ｉ、４２・・・セン
サー６０′・・・摺動面 ６１．６５・・・
導電部分６２・・・非導電部分（絶縁層）
６３．６１１・・・導電性ブラシ ６３′・・・・°・
接 片出願人 小西六写真工業株式会社第２図
１人
第５図
第６図
ｖｏ
第７図FIG. 1 is an overall schematic diagram of an embodiment of the present invention, FIG. 2 is a partial diagram of the area around the photoconductor, FIG. 3 is a schematic timing diagram of each process of the embodiment, and FIG. 4 is a diagram of the photoconductor. A schematic diagram of the seam detection means, FIG. 5 is a diagram of the relationship between the length of the non-conductive part and the width of the conductive brush, FIG. 6 is a schematic diagram of another seam detection means of the photoreceptor, and FIG. It is a schematic diagram when using a different contact piece. 10...-#Academic system Add...Sensitizer (image carrier) 21.22, 23...Photoconductor support roller 5...Charged transfer pole 26...Developing roller (also serves as a cleaning roller) )
, 10...Second paper feed roller 4I, 42...Sensor 60'...Sliding surface 61.65...
Conductive part 62... Non-conductive part (insulating layer) 63.611... Conductive brush 63'...°
Applicant: Konishiroku Photo Industry Co., Ltd. Figure 2 1 person Figure 5 Figure 6 vo Figure 7
Claims (1)
合して無端状とし、前記接合部に対し直角な方向に移動
できるようにした像担持体で画像記録域外の外周側縁部
の全周にわたり導電部分と非導電部分よりなる摺動面を
設け、更に前記摺動面に摺接する導電性摺接部材を画像
記録装置本体に設けて該摺接部材が前記摺動面の導電部
分に摺接しているか、非導電部分に摺接しているかを電
気的に検知して、画像記録開始のタイミングを制御する
ことを特徴とした画像形成装置。An image carrier is formed by bonding both ends of a strip having a conductive layer and a photosensitive layer on a support to form an endless shape, and is movable in a direction perpendicular to the bonded portion. A sliding surface consisting of a conductive portion and a non-conductive portion is provided over the entire circumference, and a conductive sliding member that slides on the sliding surface is provided on the main body of the image recording apparatus, and the sliding member contacts the conductive portion of the sliding surface. An image forming apparatus characterized in that the timing of starting image recording is controlled by electrically detecting whether the image forming apparatus is in sliding contact with a non-conductive part or a non-conductive part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61083705A JPS62239175A (en) | 1986-04-11 | 1986-04-11 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61083705A JPS62239175A (en) | 1986-04-11 | 1986-04-11 | Image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62239175A true JPS62239175A (en) | 1987-10-20 |
Family
ID=13809906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61083705A Pending JPS62239175A (en) | 1986-04-11 | 1986-04-11 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62239175A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02100082A (en) * | 1988-10-07 | 1990-04-12 | Ricoh Co Ltd | Image forming device |
| JPH02187774A (en) * | 1988-11-25 | 1990-07-23 | Xerox Corp | Electric connection comprising two elements |
| KR20000043088A (en) * | 1998-12-28 | 2000-07-15 | 윤종용 | Electrophotographic printer |
| US7589751B2 (en) * | 2005-12-05 | 2009-09-15 | Sharp Kabushiki Kaisha | Image forming apparatus and method for adjusting the interval between a write head and a photoreceptor |
-
1986
- 1986-04-11 JP JP61083705A patent/JPS62239175A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02100082A (en) * | 1988-10-07 | 1990-04-12 | Ricoh Co Ltd | Image forming device |
| JPH02187774A (en) * | 1988-11-25 | 1990-07-23 | Xerox Corp | Electric connection comprising two elements |
| KR20000043088A (en) * | 1998-12-28 | 2000-07-15 | 윤종용 | Electrophotographic printer |
| US7589751B2 (en) * | 2005-12-05 | 2009-09-15 | Sharp Kabushiki Kaisha | Image forming apparatus and method for adjusting the interval between a write head and a photoreceptor |
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