JP2007193193A5 - - Google Patents
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- JP2007193193A5 JP2007193193A5 JP2006012514A JP2006012514A JP2007193193A5 JP 2007193193 A5 JP2007193193 A5 JP 2007193193A5 JP 2006012514 A JP2006012514 A JP 2006012514A JP 2006012514 A JP2006012514 A JP 2006012514A JP 2007193193 A5 JP2007193193 A5 JP 2007193193A5
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- JP
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- Prior art keywords
- paper
- paper edge
- detection range
- detection
- value
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- 238000001514 detection method Methods 0.000 claims 13
- 238000003708 edge detection Methods 0.000 claims 9
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005755 formation reaction Methods 0.000 claims 1
Claims (3)
前記搬送路に配置され、前記用紙の用紙端を検出する用紙端検出手段と、
前記搬送路において前記用紙端が通過すべき搬送基準位置に対する、前記用紙端検出手段により検出された前記用紙端のズレ量を算出する算出手段と、
前記ズレ量に基づいて前記用紙に形成される画像の画像形成開始位置を補正する補正手段とを備え、
前記用紙端検出手段は、前記用紙が該用紙端検出手段に搬送されていない状態における検出値と、前記用紙が該用紙端検出手段に搬送された状態における検出値を用いて前記用紙端を検出するための閾値を決定し、決定された該閾値を基準にして前記用紙端を検出する
ことを特徴とする画像形成装置。 A transport path for transporting paper,
A paper edge detecting means arranged in the conveyance path for detecting a paper edge of the paper;
Calculation means for calculating a deviation amount of the paper edge detected by the paper edge detection means with respect to a conveyance reference position through which the paper edge should pass in the conveyance path;
Correction means for correcting an image formation start position of an image formed on the sheet based on the shift amount;
The paper edge detection means detects the paper edge using a detection value when the paper is not conveyed to the paper edge detection means and a detection value when the paper is conveyed to the paper edge detection means. An image forming apparatus comprising: determining a threshold value to detect the sheet edge based on the determined threshold value.
前記画像形成装置は、前記搬送基準位置から前記複数の受光素子の出力値を順次読み出す読出し手段と、前記用紙のサイズに応じて前記用紙端の検出範囲を設定する用紙端検出範囲設定手段とをさらに備え、
前記用紙端検出範囲設定手段によって設定された検出範囲内において、前記順次読み出された出力値のなかで前記閾値を超える出力値のうち最終の出力値に基づいて前記用紙端を検出することを特徴とする請求項１に記載の画像形成装置。 The paper edge detection means includes a line sensor in which a plurality of light receiving elements are arranged in a line in a direction orthogonal to the paper conveyance direction,
The image forming apparatus includes: a reading unit that sequentially reads output values of the plurality of light receiving elements from the conveyance reference position; and a paper end detection range setting unit that sets the detection range of the paper end according to the size of the paper. In addition,
In the detection range set by the paper edge detection range setting means, the paper edge is detected based on a final output value among output values exceeding the threshold value among the sequentially read output values. The image forming apparatus according to claim 1, wherein:
前記画像形成装置は、前記搬送基準位置から前記複数の受光素子の出力値を順次読み出す読出し手段と、前記用紙のサイズに応じて前記用紙端の検出範囲を設定する用紙端検出範囲設定手段とをさらに備え、
前記補正手段は、前記用紙端検出範囲設定手段によって設定された検出範囲において用紙端が検出されなかった場合で、前記検出範囲における前記順次読み出された出力値の最終の出力値が、前記用紙が該用紙端検出手段に搬送された状態における検出値の場合には、前記検出範囲の開始位置を用紙端と判断し、前記検出範囲における前記順次読み出された出力値の最終の出力値が、前記用紙が該用紙端検出手段に搬送されていない状態における検出値の場合には、前記検出範囲の終了位置を用紙端と判断して画像形成開始位置を補正することを特徴とする請求項１に記載の画像形成装置。 The paper edge detection means includes a line sensor in which a plurality of light receiving elements are arranged in a line in a direction orthogonal to the paper conveyance direction,
The image forming apparatus includes: a reading unit that sequentially reads output values of the plurality of light receiving elements from the conveyance reference position; and a paper end detection range setting unit that sets the detection range of the paper end according to the size of the paper. In addition,
The correction means is a case where a paper edge is not detected in the detection range set by the paper edge detection range setting means, and a final output value of the sequentially read output values in the detection range is the paper Is a detection value in a state where it is conveyed to the paper edge detection means, the start position of the detection range is determined as the paper edge, and the final output value of the sequentially read output values in the detection range is The image forming start position is corrected by determining that the end position of the detection range is the end of the sheet when the detected value is in a state where the sheet is not conveyed to the sheet end detecting unit. The image forming apparatus according to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006012514A JP4804153B2 (en) | 2006-01-20 | 2006-01-20 | Image forming apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006012514A JP4804153B2 (en) | 2006-01-20 | 2006-01-20 | Image forming apparatus |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2007193193A JP2007193193A (en) | 2007-08-02 |
| JP2007193193A5 true JP2007193193A5 (en) | 2009-03-05 |
| JP4804153B2 JP4804153B2 (en) | 2011-11-02 |
Family
ID=38448924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006012514A Expired - Fee Related JP4804153B2 (en) | 2006-01-20 | 2006-01-20 | Image forming apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4804153B2 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009083115A (en) * | 2007-09-27 | 2009-04-23 | Seiko Epson Corp | Liquid discharge apparatus and its control method |
| JP5043611B2 (en) * | 2007-11-27 | 2012-10-10 | キヤノン株式会社 | Image forming apparatus |
| US7883081B2 (en) | 2008-07-08 | 2011-02-08 | Kabushiki Kaisha Toshiba | Sheet finishing apparatus and control method |
| JP5995551B2 (en) | 2012-06-27 | 2016-09-21 | キヤノン株式会社 | Sheet processing apparatus, control method therefor, and program |
| JP6759994B2 (en) * | 2016-11-11 | 2020-09-23 | コニカミノルタ株式会社 | Paper edge detection device, image forming device and paper edge detection method |
| US10106354B2 (en) | 2017-03-02 | 2018-10-23 | Ricoh Company, Ltd. | Sheet conveying device, image forming apparatus incorporating the sheet conveying device, and post processing device incorporating the sheet conveying device |
| JP6933035B2 (en) * | 2017-08-09 | 2021-09-08 | コニカミノルタ株式会社 | Image forming device |
| JP7077803B2 (en) * | 2018-06-12 | 2022-05-31 | 京セラドキュメントソリューションズ株式会社 | Sensor unit and image forming device equipped with it |
| JP7077804B2 (en) * | 2018-06-12 | 2022-05-31 | 京セラドキュメントソリューションズ株式会社 | Sensor unit and image forming device equipped with it |
| JP7284025B2 (en) * | 2019-07-31 | 2023-05-30 | 株式会社Pfu | MEDIUM CONVEYING DEVICE AND JUDGMENT METHOD |
| JP2022151065A (en) * | 2021-03-26 | 2022-10-07 | 京セラドキュメントソリューションズ株式会社 | image forming device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08231083A (en) * | 1995-02-24 | 1996-09-10 | Ricoh Co Ltd | Correcting device for side slip of paper sheet |
| JP2002292960A (en) * | 2001-03-30 | 2002-10-09 | Canon Inc | Image forming apparatus and method for forming image |
| JP4261804B2 (en) * | 2002-01-30 | 2009-04-30 | キヤノン株式会社 | Image forming apparatus and control method thereof |
-
2006
- 2006-01-20 JP JP2006012514A patent/JP4804153B2/en not_active Expired - Fee Related
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