JPS6151429A - Control method for friction separated paper feed - Google Patents

Control method for friction separated paper feed

Info

Publication number
JPS6151429A
JPS6151429A JP59168871A JP16887184A JPS6151429A JP S6151429 A JPS6151429 A JP S6151429A JP 59168871 A JP59168871 A JP 59168871A JP 16887184 A JP16887184 A JP 16887184A JP S6151429 A JPS6151429 A JP S6151429A
Authority
JP
Japan
Prior art keywords
paper
sensor
roller
paper feeding
feed roller
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
JP59168871A
Other languages
Japanese (ja)
Inventor
Yasuaki Ishii
石井　泰明
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP59168871A priority Critical patent/JPS6151429A/en
Publication of JPS6151429A publication Critical patent/JPS6151429A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/34—Varying the phase of feed relative to the receiving machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/20—Controlling associated apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Controlling Sheets Or Webs (AREA)

Abstract

PURPOSE:To shorten the intervals of paper feed by correcting the rotating speed of a feed roller, according to a difference between the standard conveyance velocity and the actual conveyance velocity at which a paper sheet is supplied from paper feeding part to preliminary paper feeding position. CONSTITUTION:When a paper feeding signal is given, a feed roller 2a and a pickup roller 1 in a friction separation roller 2 are made to rotate, and a paper sheet at the minimum part of a paper sheet stack is made to pass a sensor S1 and conveyed until it is detected by a sensor 2. In this instance, conveyance velocity from sensor 1 to sensor 2 is calculated by an operation control means 8, according to distance between the said sensors S1 and S2 and a difference of passage time at S1 and S2. By comparing the conveyance velocity with the standard conveyance velocity, the rotating speed of the feed roller 2a is corrected, depending upon a difference in the comparison. The scatter of paper edge positions is thereby absorbed and the intervals of paper feeding can be shortened.

Description

【発明の詳細な説明】 （技術分野） 本発明は、摩擦分離給紙方式、即ち、フィードローラと
捌き部材（固定のパッド、ローラ、あるいはトルクリミ
ッタを介した逆転ローラ等）を圧接し、重送紙を捌く様
にした給紙方式における小紙間隔給紙制御方法に関する
。Detailed Description of the Invention (Technical Field) The present invention employs a friction separation paper feeding system, in which a feed roller and a separating member (a fixed pad, roller, or a reversing roller via a torque limiter, etc.) are brought into pressure contact with each other. The present invention relates to a method for controlling paper feeding at small paper intervals in a paper feeding system that separates paper from being fed.

（従来技術） 通常、コピ一枚数は線速と間隔により（サイズが決まっ
ているため）、処理能力が決定されるため高速複写機に
おいては、線速（ローラによる紙搬送速度）アップと通
紙間隔の短縮化が計られている。(Prior art) Normally, the number of copies per copy is determined by the linear speed and spacing (because the size is fixed), so in high-speed copying machines, it is necessary to increase the linear speed (paper conveyance speed by rollers) and paper feed. Efforts are being made to shorten the interval.

そして摩擦分離給紙（固定リタードタイプ）において複
数のセンサを配しセンサ検知時刻と設定時間の和にて通
紙間隔制御する方法が知られているが、搬送路中の搬送
速度は紙種、サイズ、ローラの経時変化、環境変化等の
影響を受は一定ではなく、また、その変動の与える影響
度合が極めて大であることから、搬送路中線速が一定で
あることを前提とした従来の制御方法では紙間隔を十分
小にできなかった。For friction separation paper feeding (fixed retard type), a method is known in which multiple sensors are arranged and the paper feeding interval is controlled based on the sum of the sensor detection time and the set time. The influence of size, roller changes over time, environmental changes, etc. is not constant, and the influence of these changes is extremely large. The paper spacing could not be made sufficiently small using the control method described above.

あるいは小にした場合、次の用紙が前の用紙と重なる不
具合が発生していた。Alternatively, if the paper size was set to small, a problem occurred in which the next paper overlapped with the previous paper.

（目的） 本発明は、この様な従来例の欠点を解消し、摩擦分離給
紙において、小紙間隔化を達成する制御方法を提供する
ことを目的とするものである。(Objective) It is an object of the present invention to provide a control method that eliminates the drawbacks of the conventional example and achieves small paper spacing in frictional separation paper feeding.

（構成） そのために本発明は、給紙部から送り出された紙を予備
給紙位置まで給紙して一旦止め、その後の再給紙時の実
際の搬送速度を検出して、これにより後続の予備給紙位
置に停止されている紙の再給紙予定時刻を補正するよう
にしたことを特徴とするものである。(Structure) To achieve this, the present invention feeds the paper sent out from the paper feeding unit to the preliminary paper feeding position and temporarily stops the paper, detects the actual conveyance speed at the time of refeeding the paper, and uses this to detect the actual conveyance speed at the time of refeeding the paper. The present invention is characterized in that the scheduled re-feeding time of the paper stopped at the preliminary paper-feeding position is corrected.

以下、本発明の一実施例を図面に基づき説明する。Hereinafter, one embodiment of the present invention will be described based on the drawings.

第１図は、本発明の制御方法に係る機能ブロック図であ
る。FIG. 1 is a functional block diagram related to the control method of the present invention.

図におい１は図用紙を送り出すピックアップローラ、２
は摩擦分離ローラ（フィードローラ２ａとセパレートロ
ーラ２ｂからなる）、３はグリップローラ、４はレジス
ローラ、５はフィードローラを駆動するモータ、Ｓｌ、
Ｓ３はそれぞれ図示する位置に設けられたセンサである
。センサ信号及びモータ信号（Ｆｈ　）は駆動手段６を
介して信号入出力手段７に入り、さらに演算制御手段８
にとり込まれる。９は制御プログラム記憶手段であり、
１０は信号入出力手段、１１は紙サイズ等の入力部であ
る。In the figure, 1 is a pickup roller that sends out the drawing paper, 2
is a friction separation roller (consisting of a feed roller 2a and a separate roller 2b), 3 is a grip roller, 4 is a registration roller, 5 is a motor for driving the feed roller, Sl,
S3 is a sensor provided at the position shown in the figure. The sensor signal and the motor signal (Fh) enter the signal input/output means 7 via the drive means 6, and then the arithmetic control means 8.
be taken in. 9 is a control program storage means;
10 is a signal input/output means, and 11 is an input section for inputting paper size, etc.

用紙は画像形成域に所定のタイミングで送り出される必
要があり、レジストローラ４のスタート時刻はこの必要
時刻から決定できる（この時ローラニップ誤差、ローラ
回転立上がり遅れ時間、紙追従遅れ時間が考慮されてい
る）。The paper must be sent to the image forming area at a predetermined timing, and the start time of the registration rollers 4 can be determined from this required time (at this time, roller nip error, roller rotation start-up delay time, and paper follow-up delay time are taken into consideration) ).

従って、給紙部とレジストローラ間距離から給紙スター
ト時刻は予め予定することができる。Therefore, the paper feeding start time can be scheduled in advance based on the distance between the paper feeding section and the registration roller.

以下作用について説明する。The action will be explained below.

給紙信号が与えるとフィート二〇−ラ２ａ及びピックア
ップローラ１は共に回転駆動されセンサＳ１を通過し、
センサＳｚにて紙検知されるまで搬送される。センサＳ
１にて紙検知されるピックアップローラ１はソレノイド
により回動解除される。When a paper feed signal is given, both the foot roller 2a and the pickup roller 1 are driven to rotate and pass the sensor S1,
The paper is conveyed until it is detected by sensor Sz. sensor S
The pickup roller 1 whose paper is detected at step 1 is released from rotation by a solenoid.

またセンサＳ１．Ｓｘ間の距離が定まっていることより
、その間の搬送速度がセンサ通過時刻の差にて演算され
る。Also, sensor S1. Since the distance between Sx is fixed, the conveyance speed therebetween is calculated based on the difference in sensor passing times.

この測定線速と、フィー１一部子定線速（基準線速）の
比にてフィードローラ２ａの回転速度を補正し、再給紙
する。The rotational speed of the feed roller 2a is corrected based on the ratio of this measured linear velocity and the feed 1 element constant linear velocity (reference linear velocity), and the paper is fed again.

再給紙時刻はレジストローラ４のスタート時刻より、再
給紙から紙整合までに要する時間を差し引いて得る。The paper refeeding time is obtained by subtracting the time required from paper refeeding to paper alignment from the registration roller 4 start time.

以降順次線速を補正して給紙が行なわれる。Thereafter, the linear velocity is sequentially corrected and paper feeding is performed.

通常用紙の種類、および、その時点、環境等は一回の設
定コピー（数１０〜数１００枚の連続コピー）中にほと
んど変化しない為−回の設定コピーにつき一回の補正と
いう方法も可能である。Normally, the type of paper, the point in time, the environment, etc. hardly change during a single set copy (several 10 to several 100 sheets of continuous copying), so it is also possible to perform correction once per set copy. be.

即ち、本発明の補正されたフィードローラ回転数は次式
で与えられる。That is, the corrected feed roller rotation speed of the present invention is given by the following equation.

ＮＣ：補正されたフィードローラ回転数Ｎｏ：設定され
たフィードローラ回転数ｖｏ：設定したフィード部線速 ｖＣ：測定したフィード部線速 Ｑ　：センサＳ１，８２間検知距離 −４＝ ｔｌ：センサＳｘ検知時刻 ｔ２：センサＳｘ検知時刻 上述した制御は、演算制御手段８にて行なわれ、また各
データの記憶は制御プログラム記憶手段９で行なわれる
。NC: Corrected feed roller rotation speed No: Set feed roller rotation speed vo: Set feed section linear speed vC: Measured feed section linear speed Q: Detection distance between sensors S1 and 82 - 4 = tl: Sensor Sx Detection time t2: Sensor Sx detection time The above-mentioned control is performed by the calculation control means 8, and each data is stored in the control program storage means 9.

第２図は、この制御動作を示すフローチャートである。FIG. 2 is a flowchart showing this control operation.

このフローにおいて、フィードローラ回転数の補正は前
述の（１）式にて演算処理される。In this flow, correction of the feed roller rotation speed is calculated using the above-mentioned equation (1).

（効果） 本発明は、以上述べた通りのものであり、この方法によ
れば摩擦分離方式特有の紙先端位置ばらつきを吸収しく
初期位置の不整を含み）機械差、紙差、環境経時変化等
によりばらつく搬送速度を補正できる。従ってこれらば
らつきによりとらなければならない間隔を消去でき紙間
隔を小さく設定できる。(Effects) The present invention is as described above, and this method can absorb paper leading edge position variations unique to the friction separation method, including irregularities in the initial position) mechanical differences, paper differences, environmental changes over time, etc. This makes it possible to compensate for variations in conveyance speed. Therefore, the spacing that must be taken due to these variations can be eliminated, and the paper spacing can be set small.

従って低い線速で高処理枚数にすることにより画像形成
系の品質が向上し、機械寿命の増大等大きな効果を得る
ことが可能となる。Therefore, by processing a high number of sheets at a low linear speed, the quality of the image forming system is improved, and it is possible to obtain significant effects such as an increase in machine life.

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

第１図は、本発明の制御方法に係る機能ブロック図、第
２図和ｉ−＝旬→はその動作フローチャートである。FIG. 1 is a functional block diagram relating to the control method of the present invention, and FIG. 2 is an operational flowchart thereof.

Claims (1)

【特許請求の範囲】[Claims] フィードローラとセパレーシヨンローラからなる摩擦分
離給紙において少くとも２個の紙検出センサを備え、給
紙信号により第２センサ検知まで予備給紙を行ない、そ
の手前に配置された第１センサと第２センサ間の距離お
よび到達時刻の差によりこの間の紙帆送速度を演算し、
測定された搬送速度と規準搬送速度を比較し、この結果
に基づいてフィードローラの回転速度を補正するように
したことを特徴とする摩擦分離給紙制御方法。At least two paper detection sensors are provided for friction separation paper feeding consisting of a feed roller and a separation roller, and preliminary paper feeding is performed until the detection of the second sensor by a paper feed signal, and the first sensor and the Calculate the paper sail speed during this time based on the distance between the two sensors and the difference in arrival time,
A friction separation paper feeding control method characterized in that the measured conveyance speed is compared with a standard conveyance speed, and the rotational speed of a feed roller is corrected based on this result.
JP59168871A 1984-08-14 1984-08-14 Control method for friction separated paper feed Pending JPS6151429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59168871A JPS6151429A (en) 1984-08-14 1984-08-14 Control method for friction separated paper feed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59168871A JPS6151429A (en) 1984-08-14 1984-08-14 Control method for friction separated paper feed

Publications (1)

Publication Number Publication Date
JPS6151429A true JPS6151429A (en) 1986-03-13

Family

ID=15876105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59168871A Pending JPS6151429A (en) 1984-08-14 1984-08-14 Control method for friction separated paper feed

Country Status (1)

Country Link
JP (1) JPS6151429A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990004520A1 (en) * 1988-10-21 1990-05-03 Oki Electric Industry Co., Ltd. Method of controlling cut sheet feeder
JPH03223033A (en) * 1990-01-23 1991-10-02 Mita Ind Co Ltd Sheet supplier
US5062622A (en) * 1989-01-19 1991-11-05 Canon Kabushiki Kaisha Vibratory sheet feeder which uses phase adjustment to control the sheet feeding speed
JPH03279134A (en) * 1990-03-29 1991-12-10 Canon Inc Sheet feed device
US5119146A (en) * 1989-11-17 1992-06-02 Hitachi Koki Co., Ltd. Paper conveying device having variable speed rollers for a printing apparatus
EP0521158A1 (en) * 1990-04-13 1993-01-07 Sk Engineering Ltd Sheet feeding device
US5186449A (en) * 1990-01-23 1993-02-16 Mita Industrial Co., Ltd. Sheet feeder unit
US5540426A (en) * 1993-03-10 1996-07-30 Minolta Camera Kabushiki Kaisha Method of feeding sheets and device for the same
JPH0986715A (en) * 1995-09-20 1997-03-31 Nec Corp Paper feeder
JP2007062988A (en) * 2005-09-01 2007-03-15 Canon Inc Sheet carrying device and image forming device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5414825A (en) * 1977-07-04 1979-02-03 Eru See Hee Maarunberugu Bv Educational instrument
JPS5863487A (en) * 1981-10-12 1983-04-15 Hitachi Koki Co Ltd Paper feed controller for printer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5414825A (en) * 1977-07-04 1979-02-03 Eru See Hee Maarunberugu Bv Educational instrument
JPS5863487A (en) * 1981-10-12 1983-04-15 Hitachi Koki Co Ltd Paper feed controller for printer

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5100120A (en) * 1988-10-21 1992-03-31 Oki Electric Industry Co., Ltd Cut-sheet feeder control method
WO1990004520A1 (en) * 1988-10-21 1990-05-03 Oki Electric Industry Co., Ltd. Method of controlling cut sheet feeder
US5062622A (en) * 1989-01-19 1991-11-05 Canon Kabushiki Kaisha Vibratory sheet feeder which uses phase adjustment to control the sheet feeding speed
US5119146A (en) * 1989-11-17 1992-06-02 Hitachi Koki Co., Ltd. Paper conveying device having variable speed rollers for a printing apparatus
US5186449A (en) * 1990-01-23 1993-02-16 Mita Industrial Co., Ltd. Sheet feeder unit
JPH03223033A (en) * 1990-01-23 1991-10-02 Mita Ind Co Ltd Sheet supplier
JPH03279134A (en) * 1990-03-29 1991-12-10 Canon Inc Sheet feed device
EP0521158A1 (en) * 1990-04-13 1993-01-07 Sk Engineering Ltd Sheet feeding device
US5540426A (en) * 1993-03-10 1996-07-30 Minolta Camera Kabushiki Kaisha Method of feeding sheets and device for the same
US5692741A (en) * 1993-03-10 1997-12-02 Minolta Camera Kabushiki Kaisha Method and apparatus for feeding sheets based on comparison of actual travel time and reference travel time
US5879002A (en) * 1993-03-10 1999-03-09 Minolta Co., Ltd. Method and apparatus for feeding sheets for predetermined time which is changeable based on number of sheets fed
JPH0986715A (en) * 1995-09-20 1997-03-31 Nec Corp Paper feeder
JP2007062988A (en) * 2005-09-01 2007-03-15 Canon Inc Sheet carrying device and image forming device
US7991306B2 (en) 2005-09-01 2011-08-02 Canon Kabushiki Kaisha Sheet transport apparatus and image forming apparatus

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