JPH01236131A - Paper feed controlling method for printer or the like - Google Patents

Paper feed controlling method for printer or the like

Info

Publication number
JPH01236131A
JPH01236131A JP63060325A JP6032588A JPH01236131A JP H01236131 A JPH01236131 A JP H01236131A JP 63060325 A JP63060325 A JP 63060325A JP 6032588 A JP6032588 A JP 6032588A JP H01236131 A JPH01236131 A JP H01236131A
Authority
JP
Japan
Prior art keywords
paper
paper feeding
feeding interval
speed
interval
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
JP63060325A
Other languages
Japanese (ja)
Inventor
Yasufumi Nakazato
保史 中里
Hiroaki Kotabe
浩明 小田部
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 JP63060325A priority Critical patent/JPH01236131A/en
Publication of JPH01236131A publication Critical patent/JPH01236131A/en
Pending legal-status Critical Current

Links

Landscapes

  • Handling Of Cut Paper (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Abstract

PURPOSE:To prevent a paper jam from occurring as well as to make the promotion of high speediness attainable by changing paper feeding time and speed to the optional time and speed according to a paper feeding interval, and constituting it to compensate the paper feeding interval. CONSTITUTION:A paper feeding interval is measured by a table central processing unit 9 at each time when a rear end of a preceding sheet of paper 12 run past a final table feed roller 17 by a table sensor 15 and when a tip of a succeeding sheet of paper is reached to the table sensor 15. The paper 12 passed through the table feed roller 17 of an LCIT (large quantity paper feed tray) 5 is fed at constant speed by a resist roller 16 of a body 1. Then, whether the paper feeding interval is more than 40mm, by way of example, or not is judged by the central processing unit 9, and if YES is the case, the paper feeding interval is barrowed by stepping up rotation speed of an LCIT motor 10 as far as, for example, 50%, then if a specified period of time (for example 0.4sec) has elapsed, the motor 10 is put back to the normal speed. Thus, the paper feeding interval is narrowed for compensation.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、プリンター、複写機等で高速にプリン1−を
行なうための給紙制御方法に関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a paper feed control method for high-speed printing in printers, copying machines, etc.

(従来の技術) 第5図はレーザープリンタの給紙経路を説明する断面構
造図を示し、本体1はテーブル2の上に載置される。
(Prior Art) FIG. 5 shows a cross-sectional structural diagram illustrating a paper feeding path of a laser printer, in which a main body 1 is placed on a table 2. As shown in FIG.

給紙経路は本体1にある上、不給紙カセット3゜4のほ
か、テーブル2の側面に設けられた大量給紙トレイ5(
以下、L CI ’1’という)から本体1の感光体ユ
ニット6へ給紙され、画像が紙に記録される。ここでは
LCIT5についてのべる。
The paper feed path is located in the main body 1, as well as the non-feed paper cassette 3゜4, as well as the bulk paper feed tray 5 (
Paper is fed from the LCI '1' (hereinafter referred to as LCI '1') to the photoreceptor unit 6 of the main body 1, and an image is recorded on the paper. Here, we will talk about LCIT5.

この給紙機構の制御系ブロック図を第1図に示し、本体
制御回路7(以下、本体CPUという)からシリアル通
信バス8を介してテーブル制御回路9(以下、テーブル
CPUという)へ給紙開始を指示すると、テーブルCP
U9は、LCITモータ10およびL CI Tクラッ
チ11をONL、、LCIT底板19上に積載された紙
12の最上部から、1枚ずつ本体1へ給紙する。
A control system block diagram of this paper feeding mechanism is shown in FIG. 1, and paper feeding starts from the main body control circuit 7 (hereinafter referred to as the main body CPU) to the table control circuit 9 (hereinafter referred to as the table CPU) via the serial communication bus 8. When you specify the table CP
U9 supplies the LCIT motor 10 and the LCI T clutch 11 to the main body 1 one by one from the top of the paper 12 stacked on the LCIT bottom plate 19.

この紙の先端がLC,ITフィードローラ13より内側
に入ると、LCITプランジャ14をONLで紙が重送
されるを防止する。
When the leading edge of the paper enters inside the LC, IT feed roller 13, the LCIT plunger 14 is turned ONL to prevent the paper from being fed in duplicate.

この給紙された紙は、テーブルセンサ15によって監視
され、テーブルCPU9はテーブルセンサ15の検知出
力によって紙の位置を測定する。次に紙の後端がLCI
Tフィードローラ13を抜けたとき、LC,ITクラッ
チ11およびLCITプランジャ14を0FFL/、次
の紙をフィードする準備を行なう。そして、この給紙タ
イミング以降、再び本体CPU7から給紙開始指示が来
ると、直ちに前記の手順で給紙が連続して行なわれる。
This fed paper is monitored by the table sensor 15, and the table CPU 9 measures the position of the paper based on the detection output of the table sensor 15. Next, the trailing edge of the paper is LCI
When the sheet passes through the T feed roller 13, the LC, IT clutch 11 and LCIT plunger 14 are set to 0FFL/ to prepare for feeding the next sheet. Then, after this paper feeding timing, when a paper feeding start instruction is received again from the main body CPU 7, paper feeding is immediately performed continuously in the above-described procedure.

そして、先に給紙した紙は本体1のレジストローラI6
に到達して紙の先端が位置決めされ、さらに紙の後端が
テーブルフィードローラ17を抜けることによりLCI
T5からの給紙動作が完了する。
Then, the paper that was fed first is the registration roller I6 of main body 1.
When the leading edge of the paper reaches the position, the trailing edge of the paper passes through the table feed roller 17 and the LCI
The paper feeding operation from T5 is completed.

(発明が解決しようとする課題) 上記の大量給紙トレイ5からの給紙において、紙12の
セットの仕方、給紙された紙との摩擦による移動等で、
最上部の紙とフィードローラの位置関係、即ちLCIT
プレフィードローラ18とLCITフィードローラ13
との間隔に相当する量だけ給紙間隔はバラついてしまっ
ていた。
(Problems to be Solved by the Invention) When feeding paper from the above-mentioned bulk paper feeding tray 5, due to the way the paper 12 is set, movement due to friction with the fed paper, etc.
Positional relationship between the top paper and the feed roller, i.e. LCIT
Prefeed roller 18 and LCIT feed roller 13
The paper feeding interval varied by an amount corresponding to the interval between the two.

このため一定のタイミングで給紙を行なうと給紙間隔の
バラツキによりジャムの発生や、プリント速度の低下を
招いていた。特に高速でプリントを行なう複写機、レー
ザープリンタ等では、この給紙間隔のバラツキによるプ
リント速度の低下は大きな問題であった。
For this reason, if paper is fed at a fixed timing, the paper feeding interval varies, leading to occurrence of jams and a decrease in printing speed. Particularly in copying machines, laser printers, and the like that print at high speeds, the reduction in printing speed due to variations in paper feeding intervals has been a major problem.

本発明は、このような問題点を解消し、給紙間隔に応じ
て、給紙速度を任意の時間、速度に変更し、給紙間隔を
補正しジャムの発生を防止し高速化処理を可能とするこ
とを目的とする。
The present invention solves these problems by changing the paper feeding speed to an arbitrary time and speed according to the paper feeding interval, correcting the paper feeding interval, preventing the occurrence of jams, and enabling high-speed processing. The purpose is to

(構成および作用) 本発明は上記目的を達成するため、先に給紙された紙の
後端が最終ローラから抜けたときと1次に給紙された紙
の先端が定められた位置に達したときの給紙間隔を測定
し、その給紙間隔に応じて給紙時間、速度を任意の時間
、速度に変更し、前記給紙間隔を補正することを特徴す
る。
(Structure and operation) In order to achieve the above object, the present invention aims to achieve the following objectives: when the trailing edge of the paper fed first passes through the final roller, and when the leading edge of the paper fed first reaches a predetermined position. The present invention is characterized in that the paper feeding interval at that time is measured, and the paper feeding time and speed are changed to an arbitrary time and speed according to the paper feeding interval, and the paper feeding interval is corrected.

本発明は、先の紙の後端が最終日−ラ(テーブルフィー
ドローラ)を抜けるときテーブルセンサによって検出さ
れ、次に給紙された紙の先端が前記テーブルセンサに達
したときも検出され、この両タイミングによって給紙間
隔が測定される。
The present invention detects by a table sensor when the trailing edge of the previous paper passes through the last day roller (table feed roller), and also detects when the leading edge of the next fed paper reaches the table sensor, The paper feeding interval is measured based on these timings.

そして、給紙間隔を判断し給紙間隔のバラツキの調整や
高速化処理を必要とするときは、給紙速度を任意の時間
、および任意の速度に変更し、給紙間隔を補正するもの
である。
Then, when it is necessary to judge the paper feeding interval and adjust the dispersion in the paper feeding interval or speed up processing, the paper feeding speed can be changed to any desired time and speed to correct the paper feeding interval. be.

(実施例) 本発明は第1図の給紙制御系を用い、テーブルセンサ1
5によって先の紙の後端が最終のテーブルフィードロー
ラ17を抜けたときと、次に給紙された紙の先端がテー
ブルセンサに達したときとで給紙間隔をテーブルCP 
U 9が計81すする。
(Embodiment) The present invention uses the paper feed control system shown in FIG.
5, the paper feeding interval is determined by table CP between when the trailing edge of the previous paper passes through the final table feed roller 17 and when the leading edge of the next fed paper reaches the table sensor.
U9 made a total of 81 sips.

また、先の紙の後端をテーブルセンサ15が検出してか
らその経過時間によって、先の紙の後端がテーブルフィ
ードローラ17を抜けたことをテーブルCPU9が判定
し給紙間隔としてもよい。
Alternatively, the table CPU 9 may determine that the trailing edge of the previous paper has passed through the table feed roller 17 based on the elapsed time since the table sensor 15 detects the trailing edge of the previous paper, and set the paper feeding interval.

LCITのテーブルフィードローラ17を抜けた紙は本
体1のレジストローラ16によって一定速度で給紙され
るので、以下にのべるような給紙間隔の補正を行なうこ
とができる。
Since the paper that has passed through the table feed rollers 17 of the LCIT is fed at a constant speed by the registration rollers 16 of the main body 1, the paper feeding interval can be corrected as described below.

第2図は本発明方法の一実施例によるフローチャートで
あって、これは、先の紙の後端がテーブルフィードロー
ラ17を抜けたが、否かをテーブルCPU9がテーブル
センサ15の検知出力がら判断する(1)。もしYES
なら先の紙と次の紙の給紙間隔が例えば40nn以上あ
るが、否かをテーブルCPU9が判定する(2)。もし
YESならL CI Tモータ10の回転速度を上げ(
例えば5割アップ)給紙間隔をつめる(3)。次に一定
時間(例えば0.4秒)を経過したら(4)、前記高速
回転したLC11゛モータ10を通常速度に戻す(5)
FIG. 2 is a flowchart according to an embodiment of the method of the present invention, in which the table CPU 9 determines whether or not the trailing edge of the previous paper has passed through the table feed roller 17 based on the detection output of the table sensor 15. Do (1). If YES
If so, the table CPU 9 determines whether the feeding interval between the previous paper and the next paper is, for example, 40 nn or more (2). If YES, increase the rotation speed of LCI T motor 10 (
(e.g. 50% increase) Reduce the paper feed interval (3). Next, after a certain period of time (for example, 0.4 seconds) has passed (4), the LC 11 motor 10 that has rotated at high speed is returned to the normal speed (5)
.

以上のように一定値以上の給紙間隔があった場合、一定
量、一定時間だけLCITモータ10を高速回転するこ
とで、給紙間隔をつめて補正を行ない高速化を行なうも
のであり、この方法は実施が[、jBにできる特徴を有
する。
As described above, when the paper feeding interval exceeds a certain value, the LCIT motor 10 is rotated at high speed for a certain amount of time for a certain amount of time to correct the paper feeding interval and increase the speed. The method has the feature that it can be implemented as [,jB.

なお、第2図の動作過程において、給紙間隔が一定値以
上ない時((2)のNO)、およびLCITモータの高
速回転が一定時間経過しない時((4)のNo)は、前
記動作制御を行なわれない。
In addition, in the operation process shown in Fig. 2, when the paper feeding interval is not above a certain value (No in (2)) and when the high speed rotation of the LCIT motor does not elapse for a certain period of time (No in (4)), the above operation is performed. Not controlled.

第3図は本発明方法の別の実施例によるフローチャート
であって、これはLCITモータ1oの速度を一定時間
、目標の給紙間隔となるような値に変更し補正する方法
である。即ち第2図と同様に(1)の処理判定後に、 の制御をテーブルCPtJ9で行ない(2)、目標間隔
になる一定時間(加速時間)を経過したら(3)、モー
タ速度を通常速度に戻す(4)、即ちこの方法は最初に
目標間隔となるようなモータ速度の制御を行なうので、
精度の良い方法である。
FIG. 3 is a flowchart according to another embodiment of the method of the present invention, which is a method for correcting the speed of the LCIT motor 1o by changing it to a value that provides a target sheet feeding interval for a certain period of time. That is, as in Fig. 2, after determining the process in (1), control is performed using table CPtJ9 (2), and after a certain period of time (acceleration time) that reaches the target interval has elapsed (3), the motor speed is returned to normal speed. (4), that is, this method first controls the motor speed to achieve the target interval, so
This is a highly accurate method.

第4図は本発明方法の別の実施例によるフローチャート
であって、給紙間隔に応じてLCITモータ10を加速
している時間を制御して補正を行なう方法である。即ち
第2図と同様に(1)の処理判定後に、給紙間隔〉[1
標間隔の判定のテーブルCPU9が行ない(2)、給紙
間隔が目標間隔より大きい場合は、LCITモータ10
の回転速度も」二げ(3)、間隔補正を行なう。そして
、 の判断をテーブルCI) U 9が行ない(4)、YE
Sなら元の通常速度にモータの回転速度を戻す。
FIG. 4 is a flowchart according to another embodiment of the method of the present invention, which is a method for performing correction by controlling the time during which the LCIT motor 10 is accelerated depending on the paper feeding interval. That is, as in FIG. 2, after the process determination in (1), the paper feeding interval
The table for determining the target interval is executed by the CPU 9 (2), and if the paper feeding interval is larger than the target interval, the LCIT motor 10
The rotation speed is also corrected for the interval (3). Then, Table CI) U 9 makes the judgment (4), YE
If S, the motor rotation speed is returned to the original normal speed.

この方法を実施する場合、容易さと精度の良さを兼ね備
えている。
This method is both easy and accurate to implement.

以上本発明方法の各実施例についてのべたが、フローチ
ャートに示す値は一例を示したにすぎず、取扱う紙の紙
質、紙搬送路の機構により適切に決めれば良い。また、
これらの各実施例の組合せによる制御方法により、さら
に高率的に高速化処理ができる。また、各フローチャー
トにおける判定値を数ステップで構成することにより、
より極め細かく制御することができる。
Although each embodiment of the method of the present invention has been described above, the values shown in the flowchart are merely examples, and may be determined appropriately depending on the quality of the paper being handled and the mechanism of the paper conveyance path. Also,
A control method using a combination of these embodiments enables even more efficient high-speed processing. In addition, by configuring the judgment value in each flowchart in several steps,
It allows for more fine control.

(発明の効果) 以」二の入たように本発明方法は、大量給紙トレイから
の紙の給紙間隔を、プリンター等の処理速度に合せて補
正し高速化することができる。そして給紙間隔の調整機
能を有することによって、従来給紙間隔のバラツキに起
因するジャム発生を防止することができる。
(Effects of the Invention) As mentioned in section 2 below, the method of the present invention can speed up the paper feeding interval by correcting it in accordance with the processing speed of a printer or the like. By having the paper feeding interval adjustment function, it is possible to prevent the occurrence of jams caused by conventional variations in the paper feeding interval.

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

第1図は本発明方法を実施するための給紙機構の制御系
ブロック図、第2図ないし第4図は本発明方法の各実施
例によるフローチャート、第5図は本発明方法を実施す
る一例としてのレーザープリンタの給紙経路を説明する
断面構造図である。 1 ・・・ レーザープリンタ本体、2・・・レーザー
プリンタテーブル、3,4 ・・・上。 不給紙カセット、5 ・・・大量給紙トレイ(LCIT
)、6 ・・・感光体ユニット、7・本体制御回路(c
pu)、8 ・・シリアル通信バス、9 ・・・テーブ
ル制御回路(CP U)、10  ・LCI Tモータ
、11・・ LCITクラッチ、12・・・給紙される
紙、13・・・ LCITフィートローラ、14・・L
 CI Tプランジャ、15・・・テーブルセンサ、1
6・・・ レジストローラ、17・・・テーブルフィー
トローラ、18・・・ LCITプレフィードローラ、
19・・・ LCIT底板。 特許出願人 株式会社 リ コ − 第1図 第2図 第3図 第4図 第5図 1 本イ参  2 テーデレ
FIG. 1 is a block diagram of a control system of a paper feeding mechanism for implementing the method of the present invention, FIGS. 2 to 4 are flowcharts according to each embodiment of the method of the present invention, and FIG. 5 is an example of implementing the method of the present invention. FIG. 2 is a cross-sectional structural diagram illustrating a paper feeding path of a laser printer as shown in FIG. 1...Laser printer body, 2...Laser printer table, 3, 4...Top. Unfeeding paper cassette, 5...Large paper feed tray (LCIT)
), 6...Photoconductor unit, 7. Main body control circuit (c
pu), 8... Serial communication bus, 9... Table control circuit (CPU), 10... LCIT motor, 11... LCIT clutch, 12... Paper being fed, 13... LCIT feet Laura, 14...L
CI T plunger, 15... table sensor, 1
6... Registration roller, 17... Table foot roller, 18... LCIT prefeed roller,
19... LCIT bottom plate. Patent applicant Rico Co., Ltd. - Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 1 Reference 2 Tedere

Claims (1)

【特許請求の範囲】[Claims] 先に給紙された紙の後端が最終ローラから抜けたときと
、次に給紙された紙の先端が定められた位置に達したと
きとの給紙間隔を測定し、その給紙間隔に応じて給紙時
間、速度を任意の時間、速度に変更し、前記給紙間隔を
補正することを特徴するプリンター等の給紙制御方法。
Measure the paper feeding interval between when the trailing edge of the first fed paper leaves the final roller and when the leading edge of the next fed paper reaches a predetermined position, and calculate the paper feeding interval. A paper feeding control method for a printer, etc., characterized in that the paper feeding time and speed are changed to arbitrary times and speeds according to the paper feeding interval, and the paper feeding interval is corrected.
JP63060325A 1988-03-16 1988-03-16 Paper feed controlling method for printer or the like Pending JPH01236131A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63060325A JPH01236131A (en) 1988-03-16 1988-03-16 Paper feed controlling method for printer or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63060325A JPH01236131A (en) 1988-03-16 1988-03-16 Paper feed controlling method for printer or the like

Publications (1)

Publication Number Publication Date
JPH01236131A true JPH01236131A (en) 1989-09-21

Family

ID=13138904

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63060325A Pending JPH01236131A (en) 1988-03-16 1988-03-16 Paper feed controlling method for printer or the like

Country Status (1)

Country Link
JP (1) JPH01236131A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4241502A1 (en) * 1991-12-09 1993-06-17 Ricoh Kk Sheet feed mechanism for laser printer, copier or facsimile device - uses operation of sheet feed rollers at higher transport velocity to reduce spacing between sheets
EP0997788A2 (en) * 1998-10-26 2000-05-03 Canon Kabushiki Kaisha Sheet conveying apparatus and image forming apparatus provided with the same
CN105393173A (en) * 2014-05-22 2016-03-09 京瓷办公信息系统株式会社 Image forming device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4241502A1 (en) * 1991-12-09 1993-06-17 Ricoh Kk Sheet feed mechanism for laser printer, copier or facsimile device - uses operation of sheet feed rollers at higher transport velocity to reduce spacing between sheets
US5482265A (en) * 1991-12-09 1996-01-09 Ricoh Company, Ltd. Sheet feeder for an image forming apparatus
EP0997788A2 (en) * 1998-10-26 2000-05-03 Canon Kabushiki Kaisha Sheet conveying apparatus and image forming apparatus provided with the same
EP0997788A3 (en) * 1998-10-26 2001-07-25 Canon Kabushiki Kaisha Sheet conveying apparatus and image forming apparatus provided with the same
US6311039B1 (en) 1998-10-26 2001-10-30 Canon Kabushiki Kaisha Sheet conveying apparatus and image forming apparatus provided with the same
CN105393173A (en) * 2014-05-22 2016-03-09 京瓷办公信息系统株式会社 Image forming device
EP3147724A4 (en) * 2014-05-22 2018-01-10 Kyocera Document Solutions Inc. Image forming device
CN105393173B (en) * 2014-05-22 2019-10-18 京瓷办公信息系统株式会社 Image forming apparatus

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