JP2005148532A5 - - Google Patents
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- JP2005148532A5 JP2005148532A5 JP2003387773A JP2003387773A JP2005148532A5 JP 2005148532 A5 JP2005148532 A5 JP 2005148532A5 JP 2003387773 A JP2003387773 A JP 2003387773A JP 2003387773 A JP2003387773 A JP 2003387773A JP 2005148532 A5 JP2005148532 A5 JP 2005148532A5
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- JP
- Japan
- Prior art keywords
- sheet
- belt surface
- conveyance
- sensor
- forming apparatus
- Prior art date
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Claims (5)
前記シートの搬送方向において、前記ベルト面上に形成されたトナー像がシートに対して転写される転写位置よりも上流側に配置され、前記シートを前記転写位置に搬送する前のレジスト動作を行うとともに、前記搬送手段の一部を構成するレジストローラ対と、
前記ベルト面の移動方向における前記転写位置よりも下流側で、かつ前記レジストローラ対によるシート挟持位置からのシート移動距離が前記シートの前記搬送方向における長さよりも短い距離の位置に配置され、前記ベルト面上に位置するシートを検知するベルト面用センサと、
前記ベルト面用センサによりシートが検知されたときに、前記搬送手段による該シートの搬送を停止させる制御部とを有する画像形成装置。 An intermediate transfer belt having a belt surface on which a toner image is formed while moving, and transferring the toner image formed on the belt surface to a sheet conveyed by a conveying unit;
The toner image formed on the belt surface in the sheet conveyance direction is arranged upstream of a transfer position at which the toner image is transferred to the sheet, and performs a registration operation before the sheet is conveyed to the transfer position. And a pair of registration rollers constituting a part of the conveying means,
The sheet movement distance from the sheet clamping position by the registration roller pair is downstream of the transfer position in the movement direction of the belt surface, and is disposed at a position shorter than the length of the sheet in the conveyance direction, A belt surface sensor for detecting a sheet located on the belt surface;
An image forming apparatus comprising: a control unit configured to stop conveyance of the sheet by the conveying unit when the sheet is detected by the belt surface sensor.
前記制御部は、前記レジストローラ対によるレジスト動作開始タイミングから所定時間経過後に前記ベルト面用センサによりシートを検知したときに、前記搬送手段による該シートの搬送を停止させる画像形成装置。 The image forming apparatus according to claim 1.
The image forming apparatus that stops the conveyance of the sheet by the conveying unit when the control unit detects the sheet by the belt surface sensor after a predetermined time has elapsed from the registration operation start timing by the registration roller pair.
前記シートの搬送方向における前記転写位置よりも上流側で、かつ前記ベルト面用センサによる検知位置までのシート移動距離が前記シートの前記搬送方向における長さよりも長い距離の位置に配置され、搬送されるシートを検知する搬送路用センサを有し、
前記制御部は、前記搬送路用センサおよび前記ベルト面用センサの双方が同時にシートを検知したときは前記搬送手段による該シートの搬送を停止させない画像形成装置。 The image forming apparatus according to claim 1.
The sheet moving distance upstream of the transfer position in the sheet conveyance direction and up to the detection position by the belt surface sensor is arranged at a position longer than the length of the sheet in the conveyance direction and conveyed. A conveyance path sensor for detecting the sheet
The control unit is an image forming apparatus that does not stop the conveyance of the sheet by the conveyance unit when both the conveyance path sensor and the belt surface sensor simultaneously detect the sheet.
前記ベルト面用センサは光センサであり、前記ベルト面に対して１５°〜４５°の傾きをもって配置されている画像形成装置。 The image forming apparatus according to claim 1.
The image forming apparatus, wherein the belt surface sensor is an optical sensor and is disposed with an inclination of 15 ° to 45 ° with respect to the belt surface.
前記シートの搬送方向において、前記ベルト面上に形成されたトナー像がシートに対して転写される転写位置よりも上流側に配置され、前記シートを前記転写位置に搬送する前のレジスト動作を行うとともに、前記搬送手段の一部を構成するレジストローラ対と、
前記ベルト面の移動方向における前記転写位置よりも下流側で、かつ前記レジストローラ対によるシート挟持位置からのシート移動距離が前記シートの前記搬送方向における長さよりも短い距離の位置に配置され、前記ベルト面上に位置するシートを検知するベルト面用センサと、
前記シートの搬送方向における前記転写位置よりも上流側で、かつ前記ベルト面用センサによる検知位置までのシート移動距離が前記シートの前記搬送方向における長さよりも長い距離の位置に配置され、搬送されるシートを検知する搬送路用センサと、
前記ベルト面用センサにてシートが検知されたときに前記搬送手段による該シートの搬送を停止させるとともに、前記搬送路用センサおよび前記ベルト面用センサの双方にて同時にシートが検知されたときは前記搬送手段による該シートの搬送を停止させない制御部と
を有する画像形成装置。 An intermediate transfer belt having a belt surface on which a toner image is formed while moving, and transferring the toner image formed on the belt surface to a sheet conveyed by a conveying unit;
The toner image formed on the belt surface in the sheet conveyance direction is arranged upstream of a transfer position at which the toner image is transferred to the sheet, and performs a registration operation before the sheet is conveyed to the transfer position. And a pair of registration rollers constituting a part of the conveying means,
The sheet movement distance from the sheet clamping position by the registration roller pair is downstream of the transfer position in the movement direction of the belt surface, and is disposed at a position shorter than the length of the sheet in the conveyance direction, A belt surface sensor for detecting a sheet located on the belt surface;
The sheet moving distance upstream of the transfer position in the sheet conveyance direction and up to the detection position by the belt surface sensor is arranged at a position longer than the length of the sheet in the conveyance direction and conveyed. A conveyance path sensor for detecting a sheet to be detected;
When conveyance of the sheet by the conveying unit is stopped when the sheet is detected by the belt surface sensor, and when the sheet is simultaneously detected by both the conveyance path sensor and the belt surface sensor An image forming apparatus comprising: a control unit that does not stop the conveyance of the sheet by the conveyance unit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003387773A JP4520726B2 (en) | 2003-11-18 | 2003-11-18 | Image forming apparatus |
| CNB2004101047497A CN100451864C (en) | 2003-11-18 | 2004-11-18 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003387773A JP4520726B2 (en) | 2003-11-18 | 2003-11-18 | Image forming apparatus |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2005148532A JP2005148532A (en) | 2005-06-09 |
| JP2005148532A5 true JP2005148532A5 (en) | 2006-12-21 |
| JP4520726B2 JP4520726B2 (en) | 2010-08-11 |
Family
ID=34695031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003387773A Expired - Fee Related JP4520726B2 (en) | 2003-11-18 | 2003-11-18 | Image forming apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4520726B2 (en) |
| CN (1) | CN100451864C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4757137B2 (en) * | 2006-08-03 | 2011-08-24 | キヤノン株式会社 | Sheet conveying apparatus and image forming apparatus |
| JP5156420B2 (en) * | 2008-02-06 | 2013-03-06 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3282373B2 (en) * | 1994-05-16 | 2002-05-13 | 富士ゼロックス株式会社 | Jam processing equipment for image forming equipment |
| JPH07311511A (en) * | 1994-05-18 | 1995-11-28 | Canon Inc | Image forming device |
| JPH1020625A (en) * | 1996-07-08 | 1998-01-23 | Canon Inc | Image forming device |
| JP3687296B2 (en) * | 1997-08-21 | 2005-08-24 | 富士ゼロックス株式会社 | Image forming apparatus |
| JPH11143333A (en) * | 1997-11-13 | 1999-05-28 | Fuji Xerox Co Ltd | Both-side image forming device |
| JP3738801B2 (en) * | 1997-12-22 | 2006-01-25 | 富士ゼロックス株式会社 | Image forming apparatus |
| JP3865026B2 (en) * | 1998-11-27 | 2007-01-10 | 富士ゼロックス株式会社 | Image forming apparatus |
| AU778749B2 (en) * | 2000-01-26 | 2004-12-16 | Kba-Giori S.A. | Device and method for detecting paper sheets |
| JP4196533B2 (en) * | 2000-10-06 | 2008-12-17 | コニカミノルタホールディングス株式会社 | Image forming apparatus |
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2003
- 2003-11-18 JP JP2003387773A patent/JP4520726B2/en not_active Expired - Fee Related
-
2004
- 2004-11-18 CN CNB2004101047497A patent/CN100451864C/en not_active Expired - Fee Related