JPH0624589A - Paper feeding device - Google Patents
Paper feeding deviceInfo
- Publication number
- JPH0624589A JPH0624589A JP20751592A JP20751592A JPH0624589A JP H0624589 A JPH0624589 A JP H0624589A JP 20751592 A JP20751592 A JP 20751592A JP 20751592 A JP20751592 A JP 20751592A JP H0624589 A JPH0624589 A JP H0624589A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- speed
- transfer
- conveying
- paper feeding
- 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
Landscapes
- Controlling Sheets Or Webs (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、電子複写機等の画像
形成装置の給紙部より転写処理部に転写紙を給紙、搬送
する給紙装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding device for feeding and conveying a transfer sheet from a sheet feeding section of an image forming apparatus such as an electronic copying machine to a transfer processing section.
【０００２】[0002]
【従来の技術】電子複写機の転写紙は感光体上に形成さ
れたトナー像をタイミングよく転写するため、感光体直
前のレジストローラで一旦停止し、その位置及び搬送タ
イミングを調整し、その後光学走査を開始して感光体上
にトナー像を形成し、次いでこの感光体の回転に合わせ
てレジストローラを回転し挟持する転写紙を転写領域に
送り出している。2. Description of the Related Art A transfer sheet of an electronic copying machine transfers a toner image formed on a photoconductor in a timely manner. Therefore, the transfer roller is temporarily stopped by a registration roller immediately before the photoconductor and its position and conveyance timing are adjusted. The scanning is started to form a toner image on the photoconductor, and then the registration roller is rotated in accordance with the rotation of the photoconductor to feed the nipping transfer paper to the transfer area.
【０００３】従来の電子複写機の給紙装置においては、
給紙部よりレジストローラに転写紙を搬送する速度を給
紙部のサバキ性能を考慮して設定していたため、この間
の搬送速度は比較的低速であった。又、複数の給紙部を
有する電子複写機の給紙装置では、給紙部からレジスト
ローラまでの搬送長さが異なる場合でも同一の搬送速度
を設定していた。In the paper feeding device of the conventional electronic copying machine,
Since the speed at which the transfer paper is conveyed from the paper feed unit to the registration rollers is set in consideration of the separation performance of the paper feed unit, the conveyance speed during this period was relatively low. Further, in the sheet feeding device of the electronic copying machine having a plurality of sheet feeding portions, the same feeding speed is set even when the feeding length from the sheet feeding portion to the registration rollers is different.
【０００４】[0004]
【発明が解決しようとする課題】しかし、転写処理速度
を増進させるためには、給紙部より送り出される転写紙
をできるだけ早くレジストローラに到達させる方が有利
であるが、従来の給紙装置では搬送速度を速くし過ぎる
と給紙性能が劣化する恐れがあった。However, in order to increase the transfer processing speed, it is advantageous to make the transfer paper delivered from the paper supply unit reach the registration rollers as soon as possible, but in the conventional paper supply apparatus. If the conveying speed is too fast, the paper feeding performance may be deteriorated.
【０００５】又、複数の給紙部を有する従来の給紙装置
では給紙部からレジストローラまでの搬送長さが長くな
るほど転写処理速度が遅くなる欠点を有していた。Further, the conventional sheet feeding device having a plurality of sheet feeding portions has a drawback that the transfer processing speed becomes slower as the conveying length from the sheet feeding portion to the registration rollers becomes longer.
【０００６】この発明は、給紙装置における上記の欠点
を解消することを目的とするものであり、給紙性能を維
持しながら搬送速度を高めることができ、しかも搬送長
さによらず一定の搬送速度を実現できる給紙装置を提供
することを目的としている。An object of the present invention is to eliminate the above-mentioned drawbacks in the sheet feeding device, and it is possible to increase the conveying speed while maintaining the sheet feeding performance, and moreover, it is constant regardless of the conveying length. An object of the present invention is to provide a paper feeding device that can realize a conveying speed.
【０００７】[0007]
【課題を解決するための手段】前記課題を解決するため
に、請求項１記載の発明は、給紙部に収容される転写紙
を１枚づつ送り出す給紙手段と、前記給紙部より送り出
される前記転写紙を搬送路を介して転写処理部に搬送す
る搬送手段と、前記給紙手段及び前記搬送手段のそれぞ
れの駆動を制御する駆動制御手段とを有する給紙装置に
おいて、前記駆動制御手段は、前記給紙部より送り出さ
れる前記転写紙の位置を検知する転写紙検知手段と、こ
の転写紙検知手段から出力される信号に基づき前記給紙
手段及び前記搬送手段の駆動速度を変更可能とする速度
変更指令回路とを有することを特徴としている。In order to solve the above-mentioned problems, the invention according to claim 1 is to feed the transfer papers contained in the paper feed unit one by one, and to feed from the paper feed unit. A drive control means for transporting the transfer sheet to a transfer processing section via a transport path; and a drive control means for controlling the drive of each of the paper feed means and the transport means. Is a transfer paper detecting means for detecting the position of the transfer paper fed from the paper feeding portion, and the drive speed of the paper feeding means and the conveying means can be changed based on a signal output from the transfer paper detecting means. And a speed change command circuit for controlling the speed.
【０００８】又請求項２記載の給紙装置は、複数の給紙
部と、各給紙部に収容される転写紙を１枚づつ送り出す
複数の給紙手段と、前記各給紙部より送り出される前記
転写紙を各給紙部毎に異なる長さの搬送路を介して転写
処理部に搬送する搬送手段と、前記一の給紙部と対応す
る給紙手段及び搬送手段を選択してそれぞれの駆動を制
御する駆動制御手段とを有する給紙装置において、前記
駆動制御手段は、選択される前記搬送手段の前記搬送路
の長さに対応して駆動速度を低速度から高速度へ多段階
に変更可能とする多段階速度変更指令回路とを有するこ
とを特徴としている。According to a second aspect of the present invention, there is provided a sheet feeding device, a plurality of sheet feeding units, a plurality of sheet feeding units for feeding the transfer sheets stored in the respective sheet feeding units one by one, and a plurality of sheet feeding units for feeding the transfer sheets. Conveying means for conveying the transfer sheet to the transfer processing section via conveying paths having different lengths for each sheet feeding section, and a sheet feeding section and a conveying section corresponding to the one sheet feeding section are selected respectively. And a drive control unit for controlling the drive of the drive unit, the drive control unit is configured to set the drive speed in multiple stages from low speed to high speed according to the length of the transport path of the transport unit selected. It is characterized by having a multi-step speed change command circuit which can be changed.
【０００９】更に請求項３記載の給紙装置は、前記請求
項１又は前記請求項２記載の給紙装置において、前記給
紙手段は重送防止手段を備え、前記転写紙検知手段は前
記転写紙がこの重送防止手段を通過した後に前記信号を
出力することを特徴としている。Further, in a paper feeding device according to a third aspect of the present invention, in the paper feeding device according to the first or the second aspect, the paper feeding means includes a double feed preventing means, and the transfer paper detecting means includes the transfer means. It is characterized in that the signal is outputted after the paper passes through the double feed preventing means.
【００１０】[0010]
【作用】請求項１記載の給紙装置では、給紙部に収容さ
れる転写紙を給紙手段により１枚づつ搬送路に送り出
す。送り出された転写紙の位置を転写紙検知手段が検知
し信号を駆動制御手段に出力する。駆動制御手段内に設
けられる速度変更指令回路は給紙手段及び搬送手段の駆
動速度を変更する。In the paper feeding apparatus according to the first aspect, the transfer papers accommodated in the paper feeding section are fed one by one to the conveying path by the paper feeding means. The transfer paper detecting means detects the position of the transferred transfer paper and outputs a signal to the drive control means. A speed change command circuit provided in the drive control means changes the drive speed of the paper feeding means and the conveying means.
【００１１】請求項２記載の給紙装置では、複数の給紙
部の内、一の給紙部を選択すると、駆動制御手段は、こ
の一の給紙部に対応する給紙手段及び搬送手段を選択し
てそれぞれの駆動を開始し、一の給紙部に収容される転
写紙を選択された給紙手段により１枚づつ搬送路に送り
出す。送り出された転写紙の位置を転写紙検知手段が検
知し信号を駆動制御手段に出力する。駆動制御手段内に
設けられる多段階速度変更指令回路は、選択された搬送
手段の搬送路の長さに対応して駆動速度を選択し各給紙
手段及び各搬送手段の駆動速度を変更する。更に請求項
３記載の給紙装置は、転写紙が給紙手段の重送防止手段
を通過した後に転写紙検知手段が信号を出力し、給紙手
段及び搬送手段の駆動速度を変更する。In the paper feeding device according to the second aspect, when one paper feeding unit is selected from the plurality of paper feeding units, the drive control means causes the paper feeding means and the conveying means corresponding to the one paper feeding portion. Is started to drive each of them, and the transfer sheets accommodated in one sheet feeding section are sent out one by one to the transport path by the selected sheet feeding means. The transfer paper detecting means detects the position of the transferred transfer paper and outputs a signal to the drive control means. The multi-step speed change command circuit provided in the drive control means selects the drive speed corresponding to the length of the selected conveying path of the conveying means and changes the driving speed of each paper feeding means and each conveying means. Further, in the sheet feeding device according to the third aspect, the transfer sheet detecting unit outputs a signal after the transfer sheet has passed the double feeding preventing unit of the sheet feeding unit, and changes the driving speed of the sheet feeding unit and the conveying unit.
【００１２】[0012]
【実施例】次にこの発明の給紙装置の一実施例を添付図
面に基づき説明する。図１は給紙装置を内蔵する画像形
成装置の概略構成図、図２は駆動制御手段の速度指令の
回路ブロック図、図３は速度切り換えのフローチャー
ト、図４は給紙速度のタイミングチャートである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the paper feeding device of the present invention will be described below with reference to the accompanying drawings. 1 is a schematic configuration diagram of an image forming apparatus having a built-in paper feeding device, FIG. 2 is a circuit block diagram of a speed command of a drive control means, FIG. 3 is a speed switching flowchart, and FIG. 4 is a timing chart of paper feeding speed. .
【００１３】この画像形成装置１は複数の給紙段、即ち
上部より第一給紙段２ａ、第二給紙段２ｂ、第三給紙段
２ｃ、第四給紙段２ｄを備えており、それぞれに転写紙
３を収容する。各給紙段２ａ，２ｂ，２ｃ，２ｄの転写
紙３の上面には、それぞれ給紙ローラ４ａ，４ｂ，４
ｃ，４ｄが配置され、それぞれが連結する給紙駆動モー
タ５ａ，５ｂ，５ｃ，５ｄの回転により転写紙３を間欠
的に送り出す。各給紙ローラ４ａ，４ｂ，４ｃ，４ｄに
は重送防止手段６ａ，６ｂ，６ｃ，６ｄが併設されてお
り、転写紙３を１枚づつ次工程に送り出している。The image forming apparatus 1 is provided with a plurality of paper feed stages, that is, a first paper feed stage 2a, a second paper feed stage 2b, a third paper feed stage 2c, and a fourth paper feed stage 2d from the top. Transfer paper 3 is housed in each. On the upper surface of the transfer paper 3 of each of the paper feed stages 2a, 2b, 2c and 2d, the paper feed rollers 4a, 4b and 4 are provided.
c, 4d are arranged, and the transfer paper 3 is intermittently sent out by the rotation of the paper feed drive motors 5a, 5b, 5c, 5d connected to each other. The sheet feeding rollers 4a, 4b, 4c, 4d are provided with double feed preventing means 6a, 6b, 6c, 6d for feeding the transfer sheets 3 one by one to the next step.
【００１４】各段より送り出される転写紙３は図示しな
いガイド板に導かれて、それぞれ搬送ローラ７ａ，７
ｂ，７ｃ，７ｄに挿入される。これらの搬送ローラ７
ａ，７ｂ，７ｃ，７ｄは直列に配設されており、それぞ
れが連結する搬送駆動モータ８ａ，８ｂ，８ｃ，８ｄの
回転により転写紙３を次の搬送ローラに送り込んでい
る。又これらの搬送ローラは各給紙段の給紙ローラとリ
ンクして駆動し、各給紙段毎の搬送路を形成する。例え
ば、最上段の第一給紙段２ａは給紙ローラ４ａから搬送
ローラ７ａに至る第一搬送路９ａを形成し、第二給紙段
２ｂは給紙ローラ４ｂから搬送ローラ７ｂ及び７ａから
なる第２搬送路９ｂを形成する。以下同様に第三給紙段
２ｃは給紙ローラ４ｃから搬送ローラ７ｃ，７ｂ及び７
ａからなる第三搬送路９ｃを、第四給紙段２ｄは給紙ロ
ーラ４ｄから搬送ローラ７ｄ，７ｃ，７ｂ及び７ａから
なる第四搬送路９ｄを形成する。The transfer paper 3 delivered from each stage is guided to a guide plate (not shown), and is conveyed by rollers 7a and 7a, respectively.
b, 7c, 7d. These transport rollers 7
The a, 7b, 7c and 7d are arranged in series, and the transfer paper 3 is sent to the next conveying roller by the rotation of the conveying drive motors 8a, 8b, 8c and 8d connected to each other. Further, these conveying rollers are linked to the sheet feeding rollers of each sheet feeding stage and are driven to form a conveying path for each sheet feeding stage. For example, the uppermost first sheet feeding stage 2a forms a first conveying path 9a from the sheet feeding roller 4a to the conveying roller 7a, and the second sheet feeding stage 2b includes the sheet feeding roller 4b to the conveying rollers 7b and 7a. The second transport path 9b is formed. Similarly, the third sheet feeding stage 2c is moved from the sheet feeding roller 4c to the conveying rollers 7c, 7b and 7c.
The third paper feed path 9c is formed by the third paper feed path 4d, and the fourth paper feed stage 2d forms the fourth paper feed path 9d by the paper feed rollers 4d, 7c, 7b, and 7a.
【００１５】最上部の搬送ローラ７ａから送り出される
転写紙３は転写処理部の直前に配置されるレジストロー
ラ１０に挿入される。このレジストローラ１０は転写紙
３を突き当てて停止させ、転写紙３の先端を進行方向に
直角な方向に整位し、一定時間経過後に転写処理部の転
写領域に送り出す。転写紙３は転写処理部を構成する感
光体ドラム１１、転写用電極１２、分離用電極１３を通
過してトナー像を担持し、分離爪１４を経て搬送ベルト
１５に上載され、定着ユニット１６に送り込まれる。こ
の定着ユニット１６内で加熱、加圧された転写紙３はト
ナー像を定着し、図示しない排紙トレイに送られる。The transfer paper 3 delivered from the uppermost conveying roller 7a is inserted into the registration roller 10 arranged immediately before the transfer processing section. The registration roller 10 abuts and stops the transfer paper 3, aligns the leading end of the transfer paper 3 in a direction perpendicular to the traveling direction, and after a certain period of time, sends the transfer paper 3 to the transfer area of the transfer processing unit. The transfer paper 3 carries a toner image after passing through the photoconductor drum 11, the transfer electrode 12, and the separation electrode 13 which constitute a transfer processing unit, and is mounted on the conveyor belt 15 via the separation claw 14 and then mounted on the fixing unit 16. Sent in. The transfer paper 3 heated and pressurized in the fixing unit 16 fixes the toner image and is sent to a paper discharge tray (not shown).
【００１６】各給紙段２ａ，２ｂ，２ｃ，２ｄに配設さ
れる給紙駆動モータ５ａ，５ｂ，５ｃ，５ｄ及び搬送駆
動モータ８ａ，８ｂ，８ｃ，８ｄはそれぞれ駆動制御手
段１７に連結し、その出力信号に基づいて独立して駆動
のＯＮ／ＯＦＦ及び速度切り換えを行なう。又、駆動制
御手段１７は画像形成装置１に付設される操作盤１８に
接続し、マニュアルにより任意の給紙段を選択する。
又、操作盤１８でマニュアルを解除しオート用紙選択と
すると、画像形成装置１の原稿ガラス１９に載置される
原稿をサイズ検知手段２０が自動的に読み取り、用紙サ
イズ信号を給紙段自動選択回路２１に入力し、所要の給
紙段を選択してその選択信号を駆動制御手段１７に出力
する。又、レジストローラ１０の直前にはレジストセン
サ２２が配設され、転写紙３を検知すると信号を駆動制
御手段１７に出力し搬送駆動モータ８ａ，８ｂ，８ｃ，
８ｄの駆動を停止させる。The paper feed drive motors 5a, 5b, 5c and 5d and the paper feed drive motors 8a, 8b, 8c and 8d arranged in the respective paper feed stages 2a, 2b, 2c and 2d are connected to the drive control means 17, respectively. , ON / OFF of drive and speed switching are independently performed based on the output signal. Further, the drive control means 17 is connected to an operation panel 18 attached to the image forming apparatus 1 to manually select an arbitrary paper feed stage.
When the manual is released on the operation panel 18 and automatic paper selection is performed, the size detection means 20 automatically reads the original placed on the original glass 19 of the image forming apparatus 1 and the paper size signal is automatically selected in the paper feed stage. It is input to the circuit 21, selects a required paper feed stage, and outputs the selection signal to the drive control means 17. Further, a registration sensor 22 is arranged immediately in front of the registration roller 10 and outputs a signal to the drive control means 17 when the transfer sheet 3 is detected and conveys drive motors 8a, 8b, 8c ,.
The drive of 8d is stopped.
【００１７】次に駆動制御手段の速度指令の回路ブロッ
クの構成及び作用を図２乃至図４に基づき説明する。駆
動制御手段１７には、操作盤１８、給紙自動選択回路２
１、レジストセンサ２２からの信号を入力する制御部１
７ａと、各搬送路の給紙駆動モータ及び搬送駆動モータ
に所定の速度の駆動指令信号を出力し、これらモータか
ら速度情報信号をフィードバックして所定の速度に制御
する速度制御回路１７ｂとを有している。Next, the structure and operation of the speed command circuit block of the drive control means will be described with reference to FIGS. The drive control means 17 includes an operation panel 18 and a paper feed automatic selection circuit 2
1. Control unit 1 for inputting signals from the registration sensor 22
7a and a speed control circuit 17b for outputting a drive command signal of a predetermined speed to the paper feed drive motor and the transfer drive motor of each conveyance path and feeding back the speed information signal from these motors to control the speed to a predetermined speed. is doing.
【００１８】操作盤１８又は給紙自動選択回路２１から
の選択信号は、制御部１７ａに設けられる給紙段決定回
路２３に入力される。この給紙段決定回路２３では、決
定された給紙段に連続する搬送路上の各給紙ローラ及び
搬送ローラを特定し、これらを駆動する給紙駆動モータ
及び搬送駆動モータの駆動をＯＮとする指令信号を速度
制御回路１７ｂに出力する。又同時に、制御部１７ａ内
に設けられる速度変更指令回路１７ｃに信号を送る。こ
の速度変更指令回路１７ｃでは、決定された搬送路に対
応する速度切り換えを行なうよう、先ず初期の低速の速
度指令信号を速度制御回路１７ｂに出力する。この初期
の速度指令信号は図３に示すようにいずれの給紙段を選
択する場合であっても給紙性能を考慮した低速度ｖ１で
ある。速度制御回路１７ｂからは初期速度の駆動指令信
号が対応する搬送路の給紙駆動モータ及び搬送駆動モー
タに出力される。例えば第三給紙段２ｃを選択する信号
が給紙段決定回路２３に入力されると、第三搬送路９ｃ
上の給紙ローラ４ｃ及び搬送ローラ７ｃ，７ｂ，７ａを
特定し、給紙駆動モータ５ｃ及び搬送駆動モータ８ｃ，
８ｂ，８ａの駆動をＯＮとする指令信号を速度制御回路
１７ｂに出力する。この時速度変更指令回路１７ｃが出
力する初期の速度指令信号はｖ1であり、これに対応す
る駆動指令信号が各モータに出力される。A selection signal from the operation panel 18 or the automatic paper feed selection circuit 21 is input to the paper feed stage determination circuit 23 provided in the controller 17a. In the paper feed stage determination circuit 23, the paper feed rollers and the transport rollers on the transport path continuous to the determined paper feed stage are specified, and the drive of the paper feed drive motor and the drive motor for driving these is turned on. The command signal is output to the speed control circuit 17b. At the same time, a signal is sent to the speed change command circuit 17c provided in the control unit 17a. The speed change command circuit 17c first outputs an initial low speed speed command signal to the speed control circuit 17b so as to switch the speed corresponding to the determined conveyance path. This initial speed command signal is the low speed v1 in consideration of the paper feeding performance regardless of which paper feeding stage is selected as shown in FIG. From the speed control circuit 17b, the drive command signal of the initial speed is output to the paper feed drive motor and the transport drive motor of the corresponding transport path. For example, when a signal for selecting the third paper feed stage 2c is input to the paper feed stage determination circuit 23, the third transport path 9c
The upper paper feed roller 4c and the transport rollers 7c, 7b, 7a are specified, and the paper feed drive motor 5c and the transport drive motor 8c,
A command signal for turning on the drive of 8b and 8a is output to the speed control circuit 17b. The initial velocity command signal to be output at this time the speed change command circuit 17c is the v is 1, the drive command signal corresponding thereto is outputted to the motor.
【００１９】一方、各給紙駆動モータ及び搬送駆動モー
タの駆動をＯＮとする指令信号は制御部１７ａに内蔵さ
れるタイマ２４にも入力され、選択された給紙段の転写
紙３が各搬送路の重送防止手段を通過するのに必要なＴ
１時間がカウントされ、その経過信号を速度変更指令回
路１７ｃに入力する。速度変更指令回路１７ｃでは低速
の速度指令信号を高速の速度指令信号に切り換えて、再
度速度制御回路１７ｂに出力する。この高速の速度指令
信号は図３及び図４に示すように、第二搬送路はｖ2、
第三搬送路はｖ3、第四搬送路はｖ4と搬送路の長さに対
応して異なり、しかも長い搬送路ほど高速としている。On the other hand, a command signal for turning on the drive of each paper feed drive motor and transport drive motor is also input to the timer 24 incorporated in the control section 17a, so that the transfer paper 3 of the selected paper feed stage is transported. T required to pass the double feed prevention means of the road
One hour is counted, and the elapsed signal is input to the speed change command circuit 17c. The speed change command circuit 17c switches the low speed speed command signal to a high speed speed command signal, and outputs it again to the speed control circuit 17b. As shown in FIGS. 3 and 4, this high-speed speed command signal is v 2 ,
The third conveyance path is different from v 3 and the fourth conveyance path is different from v 4 according to the length of the conveyance path, and the longer the conveyance path, the higher the speed.
【００２０】このように、各搬送路を高速で搬送された
転写紙３がレジストセンサ２２で検知されるとその信号
を制御部１７ａのタイマ２４に入力し、レジストローラ
１０に転写紙３が当接するのに必要な時間Ｔ２をカウン
トして、その後搬送駆動モータの駆動をＯＦＦとする指
令信号を出力する。As described above, when the transfer paper 3 conveyed at high speed through the respective conveyance paths is detected by the registration sensor 22, the signal is input to the timer 24 of the control section 17a so that the transfer paper 3 hits the registration roller 10. The time T2 required for contact is counted, and then a command signal for turning off the drive of the transport drive motor is output.
【００２１】なおこの実施例では、重送防止手段と転写
紙の位置関係をタイマを用いて計測したが、重送防止手
段６ａ，６ｂ，６ｃ，６ｄの背面に転写紙検知センサを
それぞれ配置して、重送防止手段を通過した転写紙３を
検知する構成でもよい。In this embodiment, the positional relationship between the double feed prevention means and the transfer paper is measured by using a timer, but the transfer paper detection sensors are arranged on the back surfaces of the double feed prevention means 6a, 6b, 6c and 6d, respectively. The transfer paper 3 that has passed through the double feed preventing means may be detected.
【００２２】又、この実施例では各段の給紙ローラはそ
れぞれ別々の給紙駆動モータに連結し、各搬送路の搬送
ローラも別々の搬送駆動モータに連結したが、駆動制御
手段の制御により搬送路の速度を選択的に切り換えられ
る構成であれば兼用のモータを使用してもよい。Further, in this embodiment, the sheet feeding rollers of each stage are connected to different sheet feeding drive motors, and the conveying rollers of the respective conveying paths are also connected to different conveying driving motors. A dual-purpose motor may be used as long as the speed of the transport path can be selectively switched.
【００２３】[0023]
【発明の効果】以上説明したように、請求項１記載の発
明は、給紙手段及び搬送手段の駆動速度を変更可能とす
る速度変更指令回路を設けたので、給紙時には低速で駆
動し、その後は高速に切り換える、給紙性能を維持しつ
つ搬送速度を高めることができる給紙装置を提供するこ
とができる。As described above, according to the first aspect of the invention, since the speed change command circuit for changing the driving speed of the sheet feeding means and the conveying means is provided, the invention is driven at a low speed during sheet feeding, After that, it is possible to provide a paper feeding device that can switch to high speed and can increase the conveying speed while maintaining the paper feeding performance.
【００２４】又請求項２記載の発明は、複数の給紙部を
有する給紙装置でも、選択される搬送手段の搬送路の長
さに対応して駆動速度を低速度から高速度へ多段階に変
更可能とする多段階速度変更指令回路を設けたので、搬
送長さによらず一定の搬送速度を実現することができ
る。又請求項３記載の発明は、転写紙が重送防止手段を
通過した後に信号を出力する転写紙検知手段を設けたの
で、高速搬送の切り換え時期を適切なものにすることが
できる。According to the second aspect of the present invention, even in a sheet feeding device having a plurality of sheet feeding units, the driving speed is multi-stepped from low speed to high speed according to the length of the conveying path of the selected conveying means. Since the multi-step speed change command circuit that can change the speed is provided, it is possible to realize a constant transfer speed regardless of the transfer length. According to the third aspect of the present invention, the transfer paper detecting means for outputting a signal after the transfer paper has passed the double feed preventing means is provided, so that the switching timing of the high speed conveyance can be made appropriate.
【図１】給紙装置を内蔵する画像形成装置の概略構成図
である。FIG. 1 is a schematic configuration diagram of an image forming apparatus including a sheet feeding device.
【図２】駆動制御手段の速度指令の回路ブロック図であ
る。FIG. 2 is a circuit block diagram of a speed command of a drive control unit.
【図３】速度切り換えのフローチャートである。FIG. 3 is a flowchart of speed switching.
【図４】給紙速度のタイミングチャートである。FIG. 4 is a timing chart of a sheet feeding speed.
２ａ 第一給紙段 ３ 転写紙 ４ａ 給紙ローラ ５ａ 給紙駆動モータ ７ａ 搬送ローラ ８ａ 搬送駆動モータ ９ａ 第一搬送路 １７ 駆動制御手段 １７ａ 制御部 １７ｂ 速度制御回路 １７ｃ 速度変更指令回路 ２３ 給紙段決定回路 ２４ タイマ 2a 1st paper feed stage 3 Transfer paper 4a Paper feed roller 5a Paper feed drive motor 7a Transport roller 8a Transport drive motor 9a First transport path 17 Drive control means 17a Control section 17b Speed control circuit 17c Speed change command circuit 23 Paper feed stage Decision circuit 24 timer
Claims (3)
り出す給紙手段と、前記給紙部より送り出される前記転
写紙を搬送路を介して転写処理部に搬送する搬送手段
と、前記給紙手段及び前記搬送手段のそれぞれの駆動を
制御する駆動制御手段とを有する給紙装置において、前
記駆動制御手段は、前記給紙部より送り出される前記転
写紙の位置を検知する転写紙検知手段と、この転写紙検
知手段から出力される信号に基づき前記給紙手段及び前
記搬送手段の駆動速度を変更可能とする速度変更指令回
路とを有することを特徴とする給紙装置。1. A paper feed unit for feeding the transfer papers contained in the paper feed unit one by one, and a carrying unit for carrying the transfer papers fed from the paper feed unit to a transfer processing unit via a carrying path. In a paper feeding device having a drive control means for controlling the drive of each of the paper feeding means and the conveying means, the drive control means detects a transfer paper for detecting the position of the transfer paper fed from the paper feeding portion. And a speed change command circuit for changing drive speeds of the paper feeding means and the conveying means based on a signal output from the transfer paper detecting means.
転写紙を１枚づつ送り出す複数の給紙手段と、前記各給
紙部より送り出される前記転写紙を各給紙部毎に異なる
長さの搬送路を介して転写処理部に搬送する搬送手段
と、前記一の給紙部と対応する給紙手段及び搬送手段を
選択してそれぞれの駆動を制御する駆動制御手段とを有
する給紙装置において、前記駆動制御手段は、選択され
る前記搬送手段の前記搬送路の長さに対応して駆動速度
を低速度から高速度へ多段階に変更可能とする多段階速
度変更指令回路とを有することを特徴とする給紙装置。2. A plurality of paper feed units, a plurality of paper feed units for feeding the transfer papers stored in the paper feed units one by one, and the transfer papers fed from the paper feed units. Transporting means for transporting to the transfer processing section via transporting paths having different lengths for each, and drive control means for selecting the paper feeding means and the transporting means corresponding to the one paper feeding section and controlling the respective driving. In the sheet feeding device having the above-mentioned, the drive control means can change the drive speed in multiple steps from low speed to high speed in accordance with the length of the transfer path of the selected transfer means. A sheet feeding device having a command circuit.
紙装置において、前記給紙手段は重送防止手段を備え、
前記転写紙検知手段は前記転写紙がこの重送防止手段を
通過した後に前記信号を出力することを特徴とする給紙
装置。3. The paper feeding device according to claim 1 or 2, wherein the paper feeding means includes a double feed preventing means,
The sheet feeding device, wherein the transfer sheet detecting unit outputs the signal after the transfer sheet passes through the double feed preventing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20751592A JPH0624589A (en) | 1992-07-10 | 1992-07-10 | Paper feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20751592A JPH0624589A (en) | 1992-07-10 | 1992-07-10 | Paper feeding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0624589A true JPH0624589A (en) | 1994-02-01 |
Family
ID=16540997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20751592A Pending JPH0624589A (en) | 1992-07-10 | 1992-07-10 | Paper feeding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0624589A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008110835A (en) * | 2006-10-30 | 2008-05-15 | Ricoh Co Ltd | Image forming device |
| US8348271B2 (en) * | 2005-08-31 | 2013-01-08 | Brother Kogyo Kabushiki Kaisha | Printer with sheet sending mechanism |
| US8727333B2 (en) | 2012-01-23 | 2014-05-20 | Brother Kogyo Kabushiki Kaisha | Printing apparatus and program |
-
1992
- 1992-07-10 JP JP20751592A patent/JPH0624589A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8348271B2 (en) * | 2005-08-31 | 2013-01-08 | Brother Kogyo Kabushiki Kaisha | Printer with sheet sending mechanism |
| JP2008110835A (en) * | 2006-10-30 | 2008-05-15 | Ricoh Co Ltd | Image forming device |
| US8727333B2 (en) | 2012-01-23 | 2014-05-20 | Brother Kogyo Kabushiki Kaisha | Printing apparatus and program |
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