JP2000327174A5 - - Google Patents
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- Publication number
- JP2000327174A5 JP2000327174A5 JP1999140339A JP14033999A JP2000327174A5 JP 2000327174 A5 JP2000327174 A5 JP 2000327174A5 JP 1999140339 A JP1999140339 A JP 1999140339A JP 14033999 A JP14033999 A JP 14033999A JP 2000327174 A5 JP2000327174 A5 JP 2000327174A5
- Authority
- JP
- Japan
- Prior art keywords
- paper
- sensor
- roll
- control unit
- feed tray
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
Description
このようにして、正常位置まで上昇した用紙Pは、ナジャーロール35により上面から引き上げられ、用紙捌き部であるフィードロール36およびリタードロール37によって1枚毎に捌かれて下流側に搬送される。その後、所定枚数搬送されると、ナジャーロール35が下に落ち込み、用紙Pの引き上げに必要な圧力が得られなくなる。この状態を、フェイスコントロールセンサ59がアーム60の下動により認識し、制御部69はリフトアップモータ55を可動させて、リフトレバー53によりボトムプレート33を上昇させる。
この動作を繰り返して用紙Pが順に搬送され、最後の1枚が搬送を開始すると、直ぐにノーペーパーセンサ56におけるセンサ状態が変化する。このノーペーパーセンサ56における検知情報受けて、制御部69は、同一サイズの用紙が存在する他の給紙トレイが存在する場合には、その他の給紙トレイによる供給に切換えるように指示し、その結果、ジョブの途中における給紙作業を円滑に継続でき、用紙の間隔を飛ばすことなく連続した用紙の供給が可能となる。また、同一サイズの用紙が存在する他の給紙トレイが存在しない場合には、最後の用紙Pに続く次の用紙に対して実施する予定である画像処理を、画像処理部にて即座に停止するように指示している。その結果、用紙が存在しない状態での感光体ドラム25上のトナー付着が防止でき、転写装置30でのトナー汚れを未然に防ぐことができる。また、制御部69は、この検知情報を受けてコントロールパネルへ『用紙無し』表示も実施している。
In this way, the paper P that has risen to the normal position is pulled up from the upper surface by the nudger roll 35, and is fed one by one by the feed roll 36 and the retard roll 37, which are the paper scraping sections, and is conveyed downstream. . After that, when a predetermined number of sheets are conveyed, the nudger roll 35 falls down, and the pressure necessary for lifting the paper P cannot be obtained. This state is recognized by the face control sensor 59 by the downward movement of the arm 60, and the control unit 69 moves the lift-up motor 55 and raises the bottom plate 33 by the lift lever 53.
When this operation is repeated and the sheets P are sequentially conveyed, and the last one starts conveying, the sensor state in the no-paper sensor 56 immediately changes. Upon receipt of the detection information in the no paper sensor 56, the control unit 69 instructs to switch to the supply by the other paper feed tray when there is another paper feed tray having the same size paper. As a result, the paper feeding operation in the middle of the job can be continued smoothly, and continuous paper supply can be performed without skipping the paper interval. If there is no other paper feed tray with the same size paper, the image processing unit immediately stops the image processing scheduled to be performed on the next paper following the last paper P. Instructed to do. As a result, it is possible to prevent toner from adhering to the photosensitive drum 25 in the absence of a sheet, and to prevent toner contamination in the transfer device 30 in advance. Further, the control unit 69 receives the detection information and displays “no paper” on the control panel.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14033999A JP3906884B2 (en) | 1999-05-20 | 1999-05-20 | Sheet feeding apparatus and image forming apparatus using the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14033999A JP3906884B2 (en) | 1999-05-20 | 1999-05-20 | Sheet feeding apparatus and image forming apparatus using the same |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2000327174A JP2000327174A (en) | 2000-11-28 |
JP2000327174A5 true JP2000327174A5 (en) | 2005-04-07 |
JP3906884B2 JP3906884B2 (en) | 2007-04-18 |
Family
ID=15266541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14033999A Expired - Fee Related JP3906884B2 (en) | 1999-05-20 | 1999-05-20 | Sheet feeding apparatus and image forming apparatus using the same |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3906884B2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100727386B1 (en) | 2005-04-07 | 2007-06-12 | 삼성전자주식회사 | Apparatus for detecting paper and image forming device having the same |
JP2008276013A (en) * | 2007-05-01 | 2008-11-13 | Canon Inc | Image forming apparatus |
JP2009007109A (en) * | 2007-06-27 | 2009-01-15 | Sharp Corp | Paper feeding device and image forming device |
JP5011229B2 (en) * | 2008-07-30 | 2012-08-29 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus |
JP5331922B2 (en) * | 2012-05-31 | 2013-10-30 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus |
CN116969218B (en) * | 2023-09-15 | 2023-12-26 | 江苏金典高科数码有限公司 | Paper conveying device |
-
1999
- 1999-05-20 JP JP14033999A patent/JP3906884B2/en not_active Expired - Fee Related
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