JPS5992838A - Control system of paper-feeding position for paper-feeder - Google Patents

Control system of paper-feeding position for paper-feeder

Info

Publication number
JPS5992838A
JPS5992838A JP19765082A JP19765082A JPS5992838A JP S5992838 A JPS5992838 A JP S5992838A JP 19765082 A JP19765082 A JP 19765082A JP 19765082 A JP19765082 A JP 19765082A JP S5992838 A JPS5992838 A JP S5992838A
Authority
JP
Japan
Prior art keywords
paper
feeding
paper feed
output
height
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
JP19765082A
Other languages
Japanese (ja)
Inventor
Masakazu Niro
丹路 雅一
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 JP19765082A priority Critical patent/JPS5992838A/en
Publication of JPS5992838A publication Critical patent/JPS5992838A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H1/00Supports or magazines for piles from which articles are to be separated
    • B65H1/08Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device
    • B65H1/14Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device comprising positively-acting mechanical devices

Landscapes

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

Abstract

PURPOSE:To keep the pressure of paper-feeding always at a constant level by outputting a detection signal from a height detection means only at a paper- feeding timing on every cycle of paper-feeding operation. CONSTITUTION:When record papers 3 are set on a paper-feeding table 1, the paper-feeding table 1 is risen to a fixed height. When a print-button is pushed, a calling roller 4 is rotated to send out only one of the record papers 3. Then, after a fixed time, the descent of the paper-feeding table in a controller is set at 1, and although there is the output from a height-detection sensor 7, the paper-feeding table 1 is continued to be brought down. After the paper-feeding table 1 is started to be brought down, when the output from the paper height detection sensor 7 is stopped, the paper-feeding table 1 is stopped from being brought down, and the descent of the paper-feeding table is reset at 0. Before the next cycle of paper-feeding operation is started, the paper-feeding table 1 is risen until the output of the sensor is again given for making next operation of paper-feeding.

Description

【発明の詳細な説明】 技術分野 本発明は複写機の給紙装置に関し、より詳細には、給紙
台を上下、助する型式の給紙装置における給紙位置制御
方式に関するものである。
TECHNICAL FIELD The present invention relates to a paper feeding device for a copying machine, and more particularly to a paper feeding position control method in a type of paper feeding device that supports a paper feeding tray up and down.

従来技術 このf4給紙装置片を第1図に基づき説明する。Conventional technology This f4 paper feeder piece will be explained based on FIG.

図において、1は給紙台カバー2に保護された給紙台で
あり、この給紙台1の上には記録紙3が債1或されてい
る。
In the figure, reference numeral 1 denotes a paper feed tray protected by a paper feed tray cover 2, and recording paper 3 is placed on top of this paper feed tray 1.

記録紙3の最上紙は呼び出しコロ4に当接し、この呼び
出しコロ4により送りローラ5に送り出されるようにな
っている。呼び出しコロ4はレバー6により若干上下に
揺動するようになっており、給紙台1を上下に移@柵で
、記録紙3を呼び出しコロ4に押し当てると、この呼び
出しコロ4はレバー6と共に上方に揺動する。従ってこ
のレバー6の先端部の動きで記録紙3の高さを間接的に
検出することが吊来、先端部には高さ検知センサ7が設
けである。
The uppermost sheet of the recording paper 3 comes into contact with a pick-up roller 4, and is sent out to a feed roller 5 by the pick-up roller 4. The calling roller 4 is designed to be slightly swung up and down by a lever 6, and when the paper feed tray 1 is moved up and down @ the fence and the recording paper 3 is pressed against the calling roller 4, this calling roller 4 is moved by the lever 6. It also swings upwards. Therefore, it is necessary to indirectly detect the height of the recording paper 3 by the movement of the tip of the lever 6, and a height detection sensor 7 is provided at the tip.

8は送りローラ7と当接する戻しローラであり、内部に
トルクリミッタな設け、多数枚送りが発生した場合、2
枚目以降の記録紙3を給紙台1方向に戻す作用をする、
この送りローラ5の下流IIflllには搬送ローラ9
が設けてあり、記録紙3を次の工程に送る。10は記録
性3が1般送されているかどうかを検知する紙検知セン
サである。
8 is a return roller that comes into contact with the feed roller 7, and is provided with a torque limiter inside.
It functions to return the recording paper 3 after the first sheet to the direction of the paper feed tray 1,
A conveyance roller 9 is located downstream of this conveyance roller 5.
is provided to send the recording paper 3 to the next process. Reference numeral 10 denotes a paper detection sensor that detects whether or not the recording quality 3 is being normally fed.

次に給紙台1の上下動機構について述べると、正逆転モ
ータ11を設け、この回転力を直角方向に変えて、伝達
ギヤ12に伝達し、さらにこの伝達ギャ12に噛み合っ
ている給紙台上下レバー13に伝達し、その結果得られ
ろこの給紙台上下レバー13の固定if;+l 14の
回転力を図示してはい給紙台と直接接触するレバーを介
して給1紙台1に伝達するようにしたものである。
Next, the mechanism for vertically moving the paper feed tray 1 will be described. A forward/reverse motor 11 is provided, and this rotational force is changed in the right angle direction and transmitted to a transmission gear 12, and the paper feed tray is engaged with the transmission gear 12. The rotational force of the paper feed tray up and down lever 13 is transmitted to the upper and lower levers 13, and as a result, the rotational force of the paper feed tray upper and lower levers 13 is fixed if; It was designed to be communicated.

この様な給紙”M 1fffにおいて、従来はどのよう
に給紙台lの高さ制j訂1(記録紙の高さ制御1)をし
ていたかと言うと、まず、前記高さ検知センサ7が検知
信号を出力するまで給紙台1を、正逆転モータ11の回
転力で上昇し、ある一定の圧力で呼び出しコロ4と記録
紙3の最上紙を接触させろ。
In such paper feed "M 1fff", how the height of the paper feed table l (recording paper height control 1) has been conventionally controlled. First, the height detection sensor The paper feed tray 1 is raised by the rotational force of the forward/reverse motor 11 until the roller 7 outputs a detection signal, and the uppermost paper of the recording paper 3 is brought into contact with the calling roller 4 at a certain constant pressure.

そしてこの呼び出しコロ4により最上紙から順に給紙を
行なうと除々に紙高さは低くなる。すると、それにつれ
て呼び出しコロ4も若干下方に揺動し、従ってレバー6
の先端が高さ検知センサ7で検知されなくなる。そうす
るとこの高さ検知センサ7の出力変化で、再び正逆転モ
ータ11が駆動して、給紙台1を上方に押し上げ、最上
紙と呼び出しコロ4を一定圧力で接触させるものである
When the feed rollers 4 feed the sheets in order starting from the topmost sheet, the height of the sheets gradually decreases. Then, the calling roller 4 also swings slightly downward, and therefore the lever 6
The tip of the height detection sensor 7 no longer detects the tip of the height detection sensor 7. Then, due to the change in the output of the height detection sensor 7, the forward/reverse rotation motor 11 is driven again, pushing up the paper feed table 1 and bringing the top paper and the calling roller 4 into contact with a constant pressure.

ところで紙高さ検知センサ7は一般に第2図に示す裸な
回路で構成される。
By the way, the paper height detection sensor 7 is generally composed of a bare circuit shown in FIG.

図において、7aはLED、7bはフォトトランジスタ
、7Cは増幅用のトランジスタ、 7dはノくツファで
ある。この様なセンサではヒステリシスを有するため、
センサ出力が、H氏から口幅に変化する電圧と[闇から
囮に変化する電圧とでは異なり、この差が紙高さで数ミ
リメートルになることがある。
In the figure, 7a is an LED, 7b is a phototransistor, 7C is an amplification transistor, and 7d is a nozzle. Since such sensors have hysteresis,
The voltage that changes the sensor output from Mr. H to mouth width is different from the voltage that changes from darkness to decoy, and this difference can be several millimeters in paper height.

第3図は従来例の出力波形図である。(1)は圓→「高
jの時のセンサ出力のスレッシュホールドレベル、f2
) &il’J−+f’(Iu )時のスレッシュホー
ルドレベル、 (3)はセンサ出力(第2図におけるA
点の出力)、(4)はセンサバッファ出力(第2図にお
けるB点の出力)、(5)は正逆転モータ11によるモ
ータ出力である。またaは記録紙3の補給タイミング、
bはプリントスタートタイミング(給紙タイミング)で
ある。この波形図から明らかな様に(2)に示す低(・
方のスレッシ−ホールドレベル以下に落ち込むと、(4
)出力は低レベルとなり、このタイミングで(5)に示
すモータ出力が出て、正逆転モータ11が回転し、給1
tff、台1 ?、(i)K示すスレッシュホールドレ
ベル主で4甲し上げるのである。
FIG. 3 is an output waveform diagram of a conventional example. (1) is the circle → “threshold level of the sensor output at high j, f2
) &il'J-+f'(Iu), (3) is the sensor output (A in Fig. 2).
(4) is the sensor buffer output (output at point B in FIG. 2), and (5) is the motor output from the forward/reverse rotation motor 11. Also, a is the replenishment timing of recording paper 3,
b is the print start timing (paper feeding timing). As is clear from this waveform diagram, the low (・
If it falls below the threshold hold level of the
) The output becomes a low level, and at this timing, the motor output shown in (5) is output, the forward/reverse motor 11 rotates, and the supply 1
tff, unit 1? , (i) The threshold level shown by K is increased by 4.

この様に、給紙圧(!i>上紙と呼び出しコロの接触圧
) カ(1)に示すスレッシュホールドレベルト(2)
に示すスレッシュホールドレベルの間でf畠があるため
、給紙圧が高過ぎ7:N場合、あるいは低過ぎる場合が
生じ、これによってもどしローラ8による多数枚送りの
防止効果が薄れたり、あるいは逆に不送りの原因となっ
たりする欠点が生じていた。
In this way, the paper feeding pressure (!i>contact pressure between the upper paper and the calling roller) is set to the threshold level (2) shown in (1).
Since there is a f field between the threshold levels shown in 7:N, the paper feeding pressure may be too high or too low, which may weaken the effect of the return roller 8 on preventing multiple sheet feeding, or vice versa. However, there were some drawbacks that could lead to non-delivery.

目的 本発明は以上の如き従来例の欠点に鴬みてなされたもの
であり、その目的とするところは、いかなる」・′h合
も7:7に給紙圧を一定にするよう制御することにある
Purpose The present invention has been made in view of the above-mentioned drawbacks of the conventional example, and its purpose is to control the paper feeding pressure to be constant at 7:7 in any case. be.

構成 本発明について以下一実施例に基づいて説明する。composition The present invention will be explained below based on one embodiment.

第4図は高さ検知センサ7のセンサ出力及び正逆転モー
タ11、さらには呼び出しコロ4の動作タイミングであ
る。
FIG. 4 shows the sensor output of the height detection sensor 7, the forward/reverse rotation motor 11, and the operation timing of the calling roller 4.

図において(1) 〜(5)及びa、bは第3図の(1
)〜(5)及びa、bに対応するものであり、(6)は
呼び出しコロ4の動作タイミングである。
In the figure, (1) to (5), a, and b correspond to (1) in Figure 3.
) to (5), a, and b, and (6) is the operation timing of the calling roller 4.

第5図は本発明に係る給紙台1の上下動制御方式の動作
フローチャートである。
FIG. 5 is an operation flowchart of the vertical movement control method of the paper feed table 1 according to the present invention.

以下、このタイミングチャート及びフローチャートに基
づき動作説明を行なう。
The operation will be explained below based on this timing chart and flowchart.

まず記録紙3が給紙台1上にセットされると、(5)に
おける第1回目のパルスにより給紙台1は所定高さまで
上昇する。このパルスが立ち下ったタイミングでは(1
)におけるスレッシュホールドレベルをセンサ出力はク
リヤし、且つ(4)の出力も高レベルとTK−pている
。bにおいてプリントボタンが押されると、(6)に示
すように呼び出しコロ4が回転し記録紙3を1枚だけ送
り出す。この時呼び出しコロ4には不送りが発生しない
十分な圧力がかけられている。その後tなる時間が経過
すると給紙台1の下降が開示され〔(5)における負の
パルス〕、一方装置コントローラ内の給紙台下降F/F
が1にセットされる。これにより高さ検知センサ7から
出力(所定高さに達しているという出方)があるにもか
かわらず給紙台1の下降がイ・売けられる。tなる時間
は給紙台1より給紙開始された記録紙3が送りローラ5
に達する時間より長く且つ搬送ローラ9に達する時間よ
り短かいことが望ましい。
First, when the recording paper 3 is set on the paper feed tray 1, the paper feed tray 1 is raised to a predetermined height by the first pulse in (5). At the timing when this pulse fell (1
The sensor output clears the threshold level in ), and the output in (4) is also at a high level TK-p. When the print button is pressed in step b, the calling roller 4 rotates and feeds out only one sheet of recording paper 3, as shown in (6). At this time, sufficient pressure is applied to the calling roller 4 so that non-feeding does not occur. After that, when a period of time t has elapsed, the lowering of the paper feed tray 1 is announced [negative pulse in (5)], while the paper feed tray lowering F/F in the device controller is activated.
is set to 1. As a result, the paper feed tray 1 is not allowed to descend even though there is an output from the height detection sensor 7 (an output indicating that the predetermined height has been reached). At the time t, the recording paper 3 that has started to be fed from the paper feed tray 1 reaches the feed roller 5.
It is desirable that the time taken to reach the conveyance roller 9 be longer than the time taken to reach the conveyance roller 9.

給紙台1下降開始後、紙高さ検知センサ7より出力がな
くなると給紙台1の下降を停止すると共に給紙台下+f
f4= F / F’を0にリセットする。
After the paper feed tray 1 starts descending, when the output from the paper height detection sensor 7 disappears, the descent of the paper feed tray 1 is stopped and the paper feed tray bottom +f
Reset f4=F/F' to 0.

従って高さ検知センサ7からの検知信号が出力されるの
は給紙動作サイクル中の給紙タイミングにおいてのみで
あると言える。
Therefore, it can be said that the detection signal from the height detection sensor 7 is output only at the paper feeding timing during the paper feeding operation cycle.

尚、高さ検知センサ7の信号により給紙台1の下降を停
小したが、給紙台1の下降開始後、センサ出力がなくな
るのに十分な時間だけ給紙台1を下降させてもよい。こ
の時間は正逆転モータ11の回転数、上下機構のギヤ比
等により簡単に算出することが出来る。給紙台1が下降
した状態では下降した分だけ給紙圧は弱くなり、戻しロ
ーラ8による多数枚送り防止効果を低下することなく給
紙動作が行なわれる。
Note that although the descent of the paper feed tray 1 was stopped by the signal from the height detection sensor 7, even if the paper feed tray 1 was lowered for a sufficient period of time until the sensor output disappeared after the paper feed tray 1 started to descend. good. This time can be easily calculated based on the rotation speed of the forward/reverse rotation motor 11, the gear ratio of the vertical mechanism, etc. When the paper feed tray 1 is lowered, the paper feed pressure is weakened by the lowered amount, and the paper feed operation is performed without reducing the effect of the return roller 8 on preventing multiple sheet feeding.

そして次の給紙動作サイクルが開始される前に給紙台1
を再度センサ出力が出るまで上昇させ、次の給紙動作を
行なうのである。
Then, before the next paper feeding operation cycle starts,
is raised until the sensor outputs again, and the next sheet feeding operation is performed.

効果 以上本発明によれば、常に紙高さセンサの出力が発生し
た時点の給紙台高さより給紙が行なわれるため、ヒステ
リシスの影響を受けることなく、常に給紙動作時の紙高
さを一定に保つことが出来ると共に、給紙台が上昇位置
にある時は不送りが発生しないような給紙圧が得られ、
一方給紙台が下降位置にある時は戻しローラによる多数
枚送り防止効果を損ねない小さな給紙圧とすることが出
来る。
Effects and More According to the present invention, since paper is always fed from the height of the paper feed tray at the time when the output of the paper height sensor is generated, the paper height during the paper feeding operation can always be adjusted without being affected by hysteresis. In addition to being able to maintain a constant paper feed pressure, when the paper feed table is in the raised position, a paper feed pressure that does not cause non-feeding can be obtained.
On the other hand, when the paper feed tray is in the lowered position, the paper feed pressure can be set to a small value without impairing the effect of preventing multiple sheet feeding by the return roller.

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

第1図は本発明の前提となる給紙装置の一般的構成を示
す概略側面図、第2図は高さ検知センサの回路図、第3
図は従来例の制御動作タイミングチャート、第4図は本
発明に係る制御動作タイミングチャート、第5図は同フ
ローチャートである。
FIG. 1 is a schematic side view showing the general configuration of a paper feeding device that is the premise of the present invention, FIG. 2 is a circuit diagram of a height detection sensor, and FIG.
The figure is a control operation timing chart of a conventional example, FIG. 4 is a control operation timing chart according to the present invention, and FIG. 5 is a flowchart thereof.

Claims (1)

【特許請求の範囲】[Claims] 給紙台を上下動する上下動手段と、給紙台における記録
紙の高さを検知する高さ検知手段とを有し、各給紙動作
サイクル毎に、給紙タイミングにおいてのみ高さ検知手
IRからの検知信号が出力されるように給紙台を上下動
制御するようにしたことを特徴とする給紙装置の給紙位
置制御方式。
It has a vertical movement means that moves the paper feed table up and down, and a height detection means that detects the height of the recording paper on the paper feed table. A paper feed position control method for a paper feed device, characterized in that a paper feed tray is controlled to move up and down so that a detection signal from an IR is output.
JP19765082A 1982-11-12 1982-11-12 Control system of paper-feeding position for paper-feeder Pending JPS5992838A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19765082A JPS5992838A (en) 1982-11-12 1982-11-12 Control system of paper-feeding position for paper-feeder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19765082A JPS5992838A (en) 1982-11-12 1982-11-12 Control system of paper-feeding position for paper-feeder

Publications (1)

Publication Number Publication Date
JPS5992838A true JPS5992838A (en) 1984-05-29

Family

ID=16378021

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19765082A Pending JPS5992838A (en) 1982-11-12 1982-11-12 Control system of paper-feeding position for paper-feeder

Country Status (1)

Country Link
JP (1) JPS5992838A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6265836A (en) * 1985-09-13 1987-03-25 Oki Electric Ind Co Ltd Paper feeding method
US5104109A (en) * 1988-09-30 1992-04-14 Omron Tateisi Electronics Co. Paper sheet delivery/stacking control system using fuzzy inference
US20150001786A1 (en) * 2011-06-24 2015-01-01 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6265836A (en) * 1985-09-13 1987-03-25 Oki Electric Ind Co Ltd Paper feeding method
US5104109A (en) * 1988-09-30 1992-04-14 Omron Tateisi Electronics Co. Paper sheet delivery/stacking control system using fuzzy inference
US20150001786A1 (en) * 2011-06-24 2015-01-01 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus
US9221635B2 (en) * 2011-06-24 2015-12-29 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus

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