JPS6143758A - Paper feeding device - Google Patents

Paper feeding device

Info

Publication number
JPS6143758A
JPS6143758A JP59166737A JP16673784A JPS6143758A JP S6143758 A JPS6143758 A JP S6143758A JP 59166737 A JP59166737 A JP 59166737A JP 16673784 A JP16673784 A JP 16673784A JP S6143758 A JPS6143758 A JP S6143758A
Authority
JP
Japan
Prior art keywords
sheet
roll
signal
fed
paper
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
Application number
JP59166737A
Other languages
Japanese (ja)
Inventor
Akihiro Shibata
明宏 柴田
Masaaki Ikeda
雅昭 池田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP59166737A priority Critical patent/JPS6143758A/en
Publication of JPS6143758A publication Critical patent/JPS6143758A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/65Apparatus which relate to the handling of copy material
    • G03G15/6529Transporting

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Registering Or Overturning Sheets (AREA)

Abstract

PURPOSE:To copy a picture in an accurate position independentaly of the quality of paper by detecting the front end of a fed sheet in the part between a resist roll and a transfer part to generate a paper feed stop signal and generaing a refeeding signal in accordance with the extent of advance due to inertia. CONSTITUTION:A sheet S is fed by a driving roll 5a and a followingup roll 5b. When a photo sensor 6 detects the front end of the sheet, a signal which stops the sheet S is transmitted to stop the driving roll 5a. An encoder E inputs the turning angle of the driving roll 5a due to inertia after transmission of the stop signal to a control part. Rolls 5 are restarted in accordance with the position of the photo sensor 6 and the length by which the sheet S is advanced by the rotation of the roll 5a due to inertia. Thus, transfer is started from an accurate position of the sheet S in a transfer part and fixing is performed independently of the variance of the inertial turning angle due to the quality of the sheet S.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、電子写真複写機等における転写用シートの給
送装置に関するものでめる〇 〔従来の技術〕 電子写真複写機等に供給される転写用シートは、例えば
、特開昭51−51336号公報に記載されたように、
供給部たる給紙カセットから1枚宛搬出きれたわとレジ
ストローラによって画像転写部における転写画像位置と
タイミングをv4整された上で給送され、その紙面上の
正しい位置KIIK稿画像全画像されるよりになってい
る。
[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a feeding device for transfer sheets in electrophotographic copying machines, etc. [Prior Art] For example, as described in Japanese Patent Application Laid-Open No. 51-51336,
Once a single sheet has been unloaded from the paper cassette, which is the supply section, the registration roller adjusts the position and timing of the transferred image in the image transfer section before feeding it, and the entire KIIK original image is transferred to the correct position on the paper surface. It is becoming more and more like that.

か\るレジストローラの機能としては、回転あるいは停
止の制御の可動な駆動ローラとそれに圧着して従動ブる
従動ロー2とから成るローラ対を、停止した状態にてそ
の圧接部に、M紙力上7トより搬出されたシートの先端
を受は止めて停止させ、しかる後、感光体ドラム上の画
像位置に合せた制御部からの信号((よって電磁クラッ
チj!−接続して前記ロー2対を回転せしめ、シートを
画像転写部に結送ブーる方法がとられている。
The function of such registration rollers is to use a pair of rollers consisting of a drive roller that can be controlled to rotate or stop, and a driven roller 2 that presses against the drive roller and presses the driven roller 2. The receiver stops the leading edge of the sheet carried out from the 7th position by force, and then a signal from the control unit ((therefore, the electromagnetic clutch j!- is connected and the above-mentioned rotor A method is used in which the two pairs are rotated to transport the sheet to the image transfer section.

またCJ−、y対を常時回転状想に保ち、その直前に設
けたストッパにシートの先端を当接させて停止し、九す
師部からの4Flすによp前記ストッパを退避すること
によってシートをレジストローラに送プ込み画像転写部
へと給送する方法もとられている。
In addition, by keeping the CJ- and y-pairs in a rotating state at all times and stopping the sheet by bringing the tip of the sheet into contact with a stopper provided just before, the stopper is retracted from the 4Fl from the phloem. There is also a method in which the sheet is fed by registration rollers and then fed to the image transfer section.

しかしながら、前述した各方法は何れもシートを機械的
に当接して強制的に停止する方法をとっているため、そ
の当接部分においてシートの先端が湾曲して屈曲状態と
なるのを免れることが出来ないO 従って、シートの紙厚や紙質によつて、レジストローラ
の圧接部に当接するシートの先端位置が一定せず、づら
に回転と同時に作用するシートの反撥力も一定しないの
で、ローラ対による挾み込みのタイミングもまちまちで
、前述した如き感光体ドラム上の画像位置とのタイミン
グ同調が正確に行われ難い欠点がめる。
However, in each of the above-mentioned methods, the sheet is mechanically abutted and forced to stop, so it is impossible to avoid the tip of the sheet from curving and becoming bent at the abutting portion. Not possible. Therefore, depending on the paper thickness and quality of the sheet, the position of the tip of the sheet that contacts the pressure contact part of the registration rollers is not constant, and the repulsive force of the sheet that is applied at the same time as the rotation is also not constant. The timing of the sandwiching also varies, which poses a disadvantage that it is difficult to accurately synchronize the timing with the image position on the photosensitive drum as described above.

同様に、ストッパによる方法t〔おいても、ストッパ退
避時にシートの紙厚や紙質による特性が作用して回転し
つ\あるローラ対による挾み込みのタイミングが不定と
なり、正確な画像とのタイミングの同調が鑑しいとされ
ている。
Similarly, in method t using a stopper, when the stopper is retracted, the characteristics of the paper thickness and paper quality of the sheet come into play, making the timing of the pinching by the pair of rotating rollers unstable, and the timing with the accurate image cannot be determined. It is said that the synchronization of

〔本発明が解決しようとする問題点〕[Problems to be solved by the present invention]

本発明は、7−トの紙厚や紙質等に起因する転写画像と
のタイミング不調を屏決し、常にシートの所定位置に画
像を正確に転写し得る給紙装置の提供を目的としたもの
である。
SUMMARY OF THE INVENTION The present invention aims to provide a paper feeding device that can resolve timing problems with transferred images caused by paper thickness, paper quality, etc., and can always accurately transfer images to predetermined positions on sheets. be.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は、レジストローラによって給送されたシートの
先端を検知する検出部材からの信号と、該信号によって
動力伝達を中断された前記レジストローラが慣性回転に
よって前記シートを給送方向に進行させる進行量からの
信号とくよって画像端が供給部と画像転写部との間に設
けた少くとも一対ooo転しているレジストローラを通
過した後、停止信号によって前記レジストローラの回転
を中止することにより停止させ、前記停止信号の発生か
ら前記シートが進行した進行量に相当する値を測定し、
該値を要因として前記シートの再給送タイミングに相当
する前記レジストローラの再回転タイミングを設定する
ことにより前記レジストローラによって前記シートを前
記画像転写部に給送することを特徴とする給紙装置WK
よりて達成されるO 〔実施例〕 本発明の給紙装置の1実施例を矛1図に示す。
The present invention provides a signal from a detection member that detects the leading edge of a sheet fed by a registration roller, and a progression in which the registration roller, whose power transmission is interrupted by the signal, advances the sheet in the feeding direction by inertial rotation. After the image edge passes through at least one pair of registration rollers provided between the supply section and the image transfer section and is rotated in an ooo-o-oo manner, the rotation of the registration rollers is stopped by a stop signal. and measure a value corresponding to the amount of progress of the sheet since the generation of the stop signal;
A sheet feeding device characterized in that the sheet is fed to the image transfer unit by the registration roller by setting a re-rotation timing of the registration roller corresponding to a re-feeding timing of the sheet using the value as a factor. W.K.
[Embodiment] An embodiment of the paper feeding device of the present invention is shown in Figure 1.

図は、電子写真複写機における+U+[形成部の要部を
示したものでるり、矢示方向に回転する感光体ドラムl
は予め?I11極2によシミ荷を与えられているので光
学系3からの光入射に従ってその周面上に原稿DIC対
応した静m潜像を順次形成し、現像器4によって可視の
トナー像として行く。
The figure shows the main parts of the +U+[forming section in an electrophotographic copying machine.
In advance? Since a stain is applied to the I11 pole 2, a static latent image corresponding to the original DIC is sequentially formed on the peripheral surface according to the incidence of light from the optical system 3, and is converted into a visible toner image by the developing device 4.

一方、転写用シートSは供給部たる給紙カセットから給
送部すなわち搬出ローラ(何れも図示せず)Kよって給
送され、レジストローラ5に送られて来る。
On the other hand, the transfer sheet S is fed from a paper feed cassette, which is a supply unit, by a feed unit, which is a carry-out roller (none of which is shown) K, and is sent to the registration rollers 5.

本発明の給紙装置におけるレジストローラ5は、反時計
方向に回転しflJる駆動ローラ5aと該駆動ローラ5
aK圧ff1−.!れて回転する従動ロー25bとから
成り、mI記駆動ローラ5aは制御部からの信号によっ
て作用する電磁クラッチによって駆動力が断続されるよ
5になっている。
The registration roller 5 in the paper feeding device of the present invention includes a drive roller 5a that rotates counterclockwise and a drive roller 5a that rotates counterclockwise.
aK pressure ff1-. ! and a driven roller 25b which rotates as shown in FIG.

前記レジストローラ5の給送側に近接した位置には発光
体および受光体の一対のカブラから成る7オトヤ/す6
が給送されたシートSの先端を検出し得る位fFtK配
役され、シートsの先端を検知するとその検出信号が前
記制御部に送られ、前記電磁クラッチを断りてレジスト
ローラ5の回転を停止するようKなっている。
At a position close to the feeding side of the registration roller 5, there is a seven-layer system 6 consisting of a pair of foggers for a light emitter and a light receiver.
fFtK is positioned so that it can detect the leading edge of the fed sheet S, and when the leading edge of the sheet S is detected, the detection signal is sent to the control unit, which turns off the electromagnetic clutch and stops the rotation of the registration rollers 5. It's like K.

また、前記駆動ローラ5aの軸端にはエンコーダBが取
付られ、該駆動ロー25aが前述した如く制外部からの
(i号によって停止された後、慣性等によって回転する
角度を測定してその情報を前記fi制御部に対し伝達す
るよう罠なっている。
Further, an encoder B is attached to the shaft end of the drive roller 5a, and the drive roller 25a measures the angle at which the drive roller 25a rotates due to inertia etc. after being stopped by the control unit (i) from the control outside as described above. A trap is configured to transmit the information to the fi control section.

以下、本M紙装置によるシートの給送作用にりいて記す
と、前記レジストローラ5の挟着によって給送されたシ
ーhsの先端が前記フォトセンサ6の検出点に到達して
検出されると信号が制御部に送られ、きらに制御部から
の指令によって電磁クラッチへの通電が断たれ、前記レ
ジストローラ5へのJ!IK動力の伝達が中断する。
In the following, the sheet feeding operation by the M paper device will be described. When the leading edge of the sheet hs fed by the nipping of the registration rollers 5 reaches the detection point of the photosensor 6 and is detected. A signal is sent to the control section, and the power to the electromagnetic clutch is cut off according to a command from the control section, and the J! IK power transmission is interrupted.

前もって制御部には前記7−トSの先端が前記フォトセ
ンサ(逼の検出位置にて停止しているものとし、感光体
ドラムl上のトナーはの先端とタイミングを同調して前
記レジストローラ5の回転を再開するべくシーケンスが
構成されているが、前記レジストローラ5はその小動力
に中b1された後も慣性によって若干回転と続け、シー
トSを給送方向に若干送ったのち停止するようになる〇
木兄BAにおいては、か\るシートSの慣性による進行
量を前記駆動ローラ5aの回転角度をエンコータEKよ
って測定し、そのデータを制御部に伝達することにより
制御部はレジストローラの直径と回転角度から5/−)
3の慣性による移動量を計算し、前記t/ジストローラ
50回回行再開タイミングを修正し、フィードバックが
なされるよう構成している。勿論、エンコーダEICよ
るデータから直ちにレジストローラ5の回転再開のタイ
ミングに関係付けることもできる。
In advance, the control section assumes that the tip of the 7-tooth S has stopped at the detection position of the photo sensor, and the toner on the photosensitive drum L is moved in synchronization with the tip of the registration roller 5. The sequence is configured to restart the rotation of the registration roller 5, but even after the registration roller 5 is subjected to the small force b1, it continues to rotate slightly due to inertia, and after slightly feeding the sheet S in the feeding direction, it stops. In the Kinoe BA, the amount of advance of the sheet S due to inertia is measured by the rotation angle of the drive roller 5a by the encoder EK, and the control unit controls the registration roller by transmitting the data to the control unit. 5/- from the diameter and rotation angle)
The amount of movement due to inertia of No. 3 is calculated, and the timing for restarting the 50 rotations of the t/distroller is corrected, and feedback is provided. Of course, the data from the encoder EIC can be immediately related to the timing of restarting the rotation of the registration rollers 5.

従って、前記レジストローラ5の慣性による回転角度が
一定せず、シー)i9の停止位置が不定となっても本発
明によれば感光体ドラムl上に形成きれたトナーfりに
対し、シートSを常にタイミングを同調した上で再給送
を開始することが可能となり、シートSの正確な位置に
原稿画像を転写することが出来る◇ すなわち木兄LIQKよれば、シートSはレジストロー
95にυだ着された状態で一旦停止し、フィードバック
がかがつた形で再給送を開始することが可能となったわ
けで、前述した如き紙厚・紙質の相違によるlす給送タ
イミングの不揃いもなく安定してレジストローラ5の再
回転タイミングを決定することが出来る仁と\なる。
Therefore, even if the rotation angle of the registration roller 5 due to inertia is not constant and the stopping position of the sheet i9 is not fixed, according to the present invention, the sheet S It becomes possible to start re-feeding after always synchronizing the timing, and it is possible to transfer the original image to the correct position on the sheet S. In other words, according to Kiei LIQK, the sheet S is placed in the register row 95 υ This means that it is possible to stop once the paper has been deposited and then start feeding again with feedback, which eliminates the uneven feeding timing caused by differences in paper thickness and paper quality as described above. This makes it possible to stably determine the re-rotation timing of the registration roller 5.

なお、シー)f9の先端を検出する部材としては本実施
例に示したフォトセンサ6の他マイクロスイッチ等の使
用も可能でろシ、筐た、前記エンコータBはレジストロ
ーラ5の従動ローラ5bの軸端に取付けることも出来、
その構成も自由に選択することが出来る。
In addition to the photosensor 6 shown in this embodiment, a microswitch or the like can also be used as a member for detecting the tip of f9. It can also be attached to the end,
Its configuration can also be freely selected.

〔発明の効果〕〔Effect of the invention〕

木兄r!AKよって、原稿画像を転写用シートに対して
その紙厚・M1質等に左右されることなく常に紙面上の
正確な位置に転写することの出来る複写機の給紙装置が
提供されること\なった。
Tree brother! AK provides a paper feed device for a copying machine that can always transfer an original image onto a transfer sheet at an accurate position on the paper surface, regardless of the paper thickness, M1 quality, etc. became.

【図面の簡単な説明】[Brief explanation of drawings]

矛1図は、本発明の給紙装置を備えた複写機の画像転写
部の溝成図。 l・・・・・・感光体ドラム、2・・・・・・帯電極、
3・・・・・・光学系、4・・・・・・現gRO,5・
・・・・・レジストローラ、5a・・・・・・駆動ロー
ラ、5b・・・・・・従動ロー2.6・・・・・・7オ
トセンサ、7・・・・・・ガイド板、8・・・・・・転
写極、9・・・・・・分離極、lO・・・・・・搬送ベ
ルト、11・・・・・・クリーニング装置、D・・・・
・・原稿、S・・・・・・シート、E・・・・・・エン
コーダ。 代理人 弁理士 野 1)義 親 第1図
Figure 1 is a groove diagram of an image transfer section of a copying machine equipped with a paper feeding device of the present invention. l...Photosensitive drum, 2...Charging electrode,
3...Optical system, 4...Current gRO, 5.
...Registration roller, 5a ... Drive roller, 5b ... Driven roller 2.6 ....7 Auto sensor, 7 ... Guide plate, 8 ...Transfer pole, 9...Separation pole, lO...Transport belt, 11...Cleaning device, D...
...Manuscript, S...Sheet, E...Encoder. Agent Patent Attorney No 1) Father-in-law Figure 1

Claims (1)

【特許請求の範囲】 給送部から給送されたシートを、該シートの先端が供給
部と画像転写部との間に設けた少くとも一対の回転して
いるレジストローラを通過した後、停止信号によって前
記レジストローラの回転を中止することにより停止させ
、前記停止信号の発生時から前記シート が進行した進行量に相当する値を測定し、該値を要因と
して前記シートの再給送タイミングに相当する前記レジ
ストローラの再回転タイミングを設定することにより前
記レジストローラによって前記シートを前記画像転写部
に給送することを特徴とする給紙装置。
[Claims] The sheet fed from the feeding section is stopped after the leading edge of the sheet passes through at least a pair of rotating registration rollers provided between the feeding section and the image transfer section. The rotation of the registration rollers is stopped by stopping the rotation in response to the signal, a value corresponding to the amount of progress of the sheet from the time when the stop signal is generated is measured, and the refeeding timing of the sheet is determined using this value as a factor. A sheet feeding device characterized in that the sheet is fed to the image transfer section by the registration roller by setting a corresponding re-rotation timing of the registration roller.
JP59166737A 1984-08-08 1984-08-08 Paper feeding device Pending JPS6143758A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59166737A JPS6143758A (en) 1984-08-08 1984-08-08 Paper feeding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59166737A JPS6143758A (en) 1984-08-08 1984-08-08 Paper feeding device

Publications (1)

Publication Number Publication Date
JPS6143758A true JPS6143758A (en) 1986-03-03

Family

ID=15836814

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59166737A Pending JPS6143758A (en) 1984-08-08 1984-08-08 Paper feeding device

Country Status (1)

Country Link
JP (1) JPS6143758A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63176241A (en) * 1987-01-14 1988-07-20 Canon Inc Image forming device
JP2010116239A (en) * 2008-11-13 2010-05-27 Canon Inc Image forming device
US20110103818A1 (en) * 2009-10-30 2011-05-05 Canon Kabushiki Kaisha Image forming apparatus provided with mechanism for cleaning image carrier

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63176241A (en) * 1987-01-14 1988-07-20 Canon Inc Image forming device
JP2010116239A (en) * 2008-11-13 2010-05-27 Canon Inc Image forming device
US20110103818A1 (en) * 2009-10-30 2011-05-05 Canon Kabushiki Kaisha Image forming apparatus provided with mechanism for cleaning image carrier
US8548341B2 (en) * 2009-10-30 2013-10-01 Canon Kabushiki Kaisha Image forming apparatus provided with mechanism for cleaning image carrier

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