JP2010271407A5 - - Google Patents
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- JP2010271407A5 JP2010271407A5 JP2009121178A JP2009121178A JP2010271407A5 JP 2010271407 A5 JP2010271407 A5 JP 2010271407A5 JP 2009121178 A JP2009121178 A JP 2009121178A JP 2009121178 A JP2009121178 A JP 2009121178A JP 2010271407 A5 JP2010271407 A5 JP 2010271407A5
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- Prior art keywords
- sheet
- unit
- image forming
- length
- forming apparatus
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Claims (5)
前記外部シート給送部及び前記画像形成装置本体の間に、前記外部シート給送部及び前記画像形成装置本体から搬送されるシートの長さを検出する長さ検知ユニットを選択的に設け、
前記長さ検知ユニットは、
前記外部シート給送部及び前記画像形成装置本体から搬送されるシートの長さを検出する長さ検出部と、
前記外部シート給送部からのシートを前記画像形成装置本体の転写部へ搬送するための第１搬送路と、
前記第１搬送路から分岐し、前記外部シート給送部からのシートを選択的に前記長さ検出部に搬送する第２搬送路と、
前記画像形成装置本体から選択的に搬送されたシートを前記長さ検出部に搬送する第３搬送路と、
前記第２搬送路から分岐し、前記長さ検出部によりシート長さが検出されたシートを前記第１搬送路に搬送する第４搬送路と、
前記画像形成装置本体及び前記外部シート給送部から選択的に搬送され、シート長さが検出されたシートを前記第４搬送路に搬送するシート搬送部と、を有し、
前記外部シート給送部からのシートを前記転写部へ搬送する場合には、シートを前記第１搬送路から前記転写部に搬送し、前記画像形成装置本体及び前記外部シート給送部から選択的に搬送されたシートを前記転写部に搬送する場合には、シート長さを前記長さ検出部によって検出した後、シートを前記シート搬送部により前記第４搬送路へ搬送することを特徴とする画像形成装置。 An image forming apparatus main body comprising an image forming section for forming a toner image and a transfer section for transferring the toner image to a sheet, and an external sheet feeding connected to the image forming apparatus main body for feeding the sheet to the transfer section An image forming apparatus comprising:
A length detection unit that selectively detects the length of the sheet conveyed from the external sheet feeding unit and the image forming apparatus main body is selectively provided between the external sheet feeding unit and the image forming apparatus main body.
The length detection unit is
A length detection unit that detects the length of the sheet conveyed from the external sheet feeding unit and the image forming apparatus main body;
A first conveyance path for conveying a sheet from the external sheet feeding unit to a transfer unit of the image forming apparatus main body;
A second conveyance path that branches from the first conveyance path and selectively conveys the sheet from the external sheet feeding unit to the length detection unit;
A third conveyance path for conveying the sheet selectively conveyed from the image forming apparatus main body to the length detection unit;
A fourth conveyance path that branches from the second conveyance path and conveys the sheet whose length is detected by the length detection unit to the first conveyance path;
A sheet conveying unit that conveys a sheet that is selectively conveyed from the image forming apparatus main body and the external sheet feeding unit and whose sheet length is detected to the fourth conveying path;
When transporting a sheet from the external sheet feeding unit to the transfer unit, the sheet is transported from the first transport path to the transfer unit, and selectively from the image forming apparatus main body and the external sheet feeding unit. When the sheet conveyed to the transfer unit is conveyed to the transfer unit, the sheet length is detected by the length detection unit, and then the sheet is conveyed to the fourth conveyance path by the sheet conveyance unit. Image forming apparatus.
前記画像形成装置本体に設けられ、トナー像が定着されたシートを再度、前記画像形成部に搬送するための再搬送通路と、
前記シート給送部からのシートの長さを検出する場合及び前記トナー像が定着されたシートの長さを検出する場合は、前記シート給送部及び前記再搬送通路からのシートを選択的に前記第３搬送路に搬送するようにシートの搬送方向を切り換える切換部材と、を備えた、ことを特徴とする請求項１又は２記載の画像形成装置。 A sheet feeding unit provided in the image forming apparatus main body, for feeding a sheet to the transfer unit;
A re-conveying path provided in the image forming apparatus main body for conveying the sheet on which the toner image is fixed to the image forming unit again;
When detecting the length of the sheet from the sheet feeding unit and when detecting the length of the sheet on which the toner image is fixed, the sheets from the sheet feeding unit and the re-conveyance path are selectively selected. The image forming apparatus according to claim 1, further comprising: a switching member that switches a sheet conveyance direction so that the sheet is conveyed to the third conveyance path.
前記長さ検出部により検出されたシート長さと、前記入力部により入力されるシートの長さ情報とに応じて、前記転写部に搬送されるシートの搬送タイミングを調整する制御部と、を備えたことを特徴とする請求項１又は２記載の画像形成装置。 An input unit for inputting sheet length information;
A control unit that adjusts the conveyance timing of the sheet conveyed to the transfer unit according to the sheet length detected by the length detection unit and the sheet length information input by the input unit. the image forming apparatus according to claim 1 or 2, wherein the the.
前記長さ検出部により検出されたシート長さと、前記入力部により入力されるシートの長さ情報とに応じて、前記転写部に搬送されるシートの搬送タイミングを調整する制御部と、を備え、
前記制御部は、シートの両面に画像を形成する際には、一面に画像が形成され、前記再搬送通路から選択的に前記第２搬送路に搬送されたシートの、前記長さ検出部により検出されたシート長さと、前記入力部により入力されるシートの長さ情報とに応じて、前記転写部に搬送されるシートの搬送タイミング及び転写される画像倍率を調整することを特徴とする請求項３記載の画像形成装置。 An input unit for inputting sheet length information;
A control unit that adjusts the conveyance timing of the sheet conveyed to the transfer unit according to the sheet length detected by the length detection unit and the sheet length information input by the input unit. ,
When the control unit forms an image on both sides of the sheet, the length detection unit of the sheet on which the image is formed on one side and is selectively conveyed from the re-conveyance path to the second conveyance path is used. The conveyance timing of the sheet conveyed to the transfer unit and the image magnification to be transferred are adjusted according to the detected sheet length and the sheet length information input by the input unit. Item 4. The image forming apparatus according to Item 3 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009121178A JP5274373B2 (en) | 2009-05-19 | 2009-05-19 | Image forming apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009121178A JP5274373B2 (en) | 2009-05-19 | 2009-05-19 | Image forming apparatus |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2010271407A JP2010271407A (en) | 2010-12-02 |
| JP2010271407A5 true JP2010271407A5 (en) | 2012-06-28 |
| JP5274373B2 JP5274373B2 (en) | 2013-08-28 |
Family
ID=43419495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2009121178A Expired - Fee Related JP5274373B2 (en) | 2009-05-19 | 2009-05-19 | Image forming apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5274373B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6124515B2 (en) | 2011-08-05 | 2017-05-10 | 株式会社リコー | Sheet conveying apparatus, image forming apparatus, sheet conveying distance calculating apparatus, and sheet length calculating apparatus |
| JP5761125B2 (en) | 2011-08-22 | 2015-08-12 | 株式会社リコー | Sheet conveying apparatus and image forming apparatus |
| JP2013060300A (en) | 2011-08-25 | 2013-04-04 | Ricoh Co Ltd | Sheet conveying apparatus and image forming apparatus |
| JP5838719B2 (en) * | 2011-10-24 | 2016-01-06 | 株式会社リコー | Sheet length measuring apparatus and image forming apparatus |
| JP5949619B2 (en) * | 2013-03-25 | 2016-07-13 | 富士ゼロックス株式会社 | Image forming system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10149057A (en) * | 1996-11-20 | 1998-06-02 | Fuji Xerox Co Ltd | Image forming device |
| JP2003316208A (en) * | 2002-04-23 | 2003-11-07 | Canon Inc | Image forming apparatus |
| JP2004246164A (en) * | 2003-02-14 | 2004-09-02 | Canon Inc | Image forming apparatus |
| JP4111026B2 (en) * | 2003-03-24 | 2008-07-02 | 富士ゼロックス株式会社 | Image forming apparatus |
| JP4189465B2 (en) * | 2003-05-23 | 2008-12-03 | コニカミノルタビジネステクノロジーズ株式会社 | Image forming apparatus |
| JP2005215157A (en) * | 2004-01-28 | 2005-08-11 | Fuji Xerox Co Ltd | Image forming apparatus, inspection device, and inspection method |
| JP4556543B2 (en) * | 2004-08-10 | 2010-10-06 | 富士ゼロックス株式会社 | Image forming apparatus |
| JP4211852B2 (en) * | 2006-06-30 | 2009-01-21 | コニカミノルタビジネステクノロジーズ株式会社 | Double-sided image forming device |
-
2009
- 2009-05-19 JP JP2009121178A patent/JP5274373B2/en not_active Expired - Fee Related
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