JP2015200875A5 - - Google Patents
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- JP2015200875A5 JP2015200875A5 JP2015034920A JP2015034920A JP2015200875A5 JP 2015200875 A5 JP2015200875 A5 JP 2015200875A5 JP 2015034920 A JP2015034920 A JP 2015034920A JP 2015034920 A JP2015034920 A JP 2015034920A JP 2015200875 A5 JP2015200875 A5 JP 2015200875A5
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- 239000000463 material Substances 0.000 claims description 20
- 230000002093 peripheral Effects 0.000 claims description 15
- 238000004804 winding Methods 0.000 claims description 6
- 239000000969 carrier Substances 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims 1
- 239000011347 resin Substances 0.000 claims 1
- 229920005989 resin Polymers 0.000 claims 1
- 230000000694 effects Effects 0.000 description 1
Description
本発明の画像形成装置は、トナー像が形成される像担持体と、前記像担持体に形成されたトナー像が転写される第一転写ベルトと、前記第一転写ベルトから記録材にトナー像を転写するための転写部を前記第一転写ベルトと形成し、前記転写部に記録材を搬送する無端状の第二転写ベルトと、前記第二転写ベルトを内周面から押圧して前記転写部を形成させ、電圧の印加により前記第一転写ベルトから記録材にトナー像を転写可能な転写ローラと、前記第二転写ベルトの内周面で前記第二転写ベルトの移動方向に関し前記転写ローラの下流に設けられ、前記転写ローラと前記第二転写ベルトを張架して前記第二転写ベルトに記録材の搬送面を形成する搬送面形成ローラと、前記第二転写ベルトの内周面で前記第二転写ベルトの移動方向に関し前記搬送面形成ローラに隣り合うように前記搬送面形成ローラの下流に設けられ、前記第二転写ベルトを張架する張架ローラと、前記第二転写ベルトの内周面で前記第二転写ベルトの移動方向に関し前記張架ローラに隣り合うように前記張架ローラの下流に設けられ、前記第二転写ベルトを駆動する駆動ローラと、を備え、前記搬送面形成ローラは、回転軸線方向の両端部が回転軸線方向の中央部よりも小さい直径に形成され、前記張架ローラは、回転軸線方向の両端部が回転軸線方向の中央部よりも大きい直径に形成され、前記駆動ローラは、回転軸線方向に沿って実質的に同一の直径に形成されている、ことを特徴とする。
本発明の画像形成装置は、トナー像が形成される像担持体と、前記像担持体に形成されたトナー像が転写される第一転写ベルトと、前記第一転写ベルトから記録材にトナー像を転写するための転写部を前記第一転写ベルトと形成し、前記転写部に記録材を搬送する無端状の第二転写ベルトと、前記第二転写ベルトを内周面から押圧して前記転写部を形成させ、電圧の印加により前記第一転写ベルトから記録材にトナー像を転写可能な転写ローラと、前記第二転写ベルトの内周面で前記第二転写ベルトの移動方向に関し前記転写ローラの下流に設けられ、前記転写ローラと前記第二転写ベルトを張架して前記第二転写ベルトに記録材の搬送面を形成する搬送面形成ローラと、前記第二転写ベルトの内周面で前記第二転写ベルトの移動方向に関し前記搬送面形成ローラに隣り合うように前記搬送面形成ローラの下流に設けられ、前記第二転写ベルトを張架する張架ローラと、を備え、前記搬送面形成ローラは、回転軸線方向の両端部が回転軸線方向の中央部よりも小さい直径に形成され、前記張架ローラは、回転軸線方向の両端部が回転軸線方向の中央部よりも大きい直径に形成され、前記搬送面形成ローラの最大外径と最小外径の差をΔＲ１とし、前記第二転写ベルトの前記搬送面形成ローラの回転軸線方向の中央部に対する巻き付き角度をθ１とし、前記張架ローラの最大外径と最小外径の差をΔＲ２とし、前記第二転写ベルトの前記張架ローラの回転軸線方向の中央部に対する巻き付き角度をθ２とするとき、ΔＲ１×θ１≦ΔＲ２×θ２の関係式を満たす、ことを特徴とする。
The image forming apparatus of the present invention, an image bearing member having the toner image Ru is formed with a first transfer belt to which the toner image formed on the image bearing member is transferred, the toner image on the recording material from the first transfer belt The transfer portion for transferring the image is formed with the first transfer belt, the endless second transfer belt that conveys the recording material to the transfer portion, and the second transfer belt is pressed from the inner peripheral surface to transfer the transfer material. parts to form the transfer and transferable transfer roller bets toner image to the recording material from the first transfer belt by applying a voltage, it relates to a mobile direction of the second transfer belt at the inner circumferential surface of the second transfer belt A conveyance surface forming roller that is provided downstream of the roller and stretches the transfer roller and the second transfer belt to form a conveyance surface of the recording material on the second transfer belt; and an inner peripheral surface of the second transfer belt With respect to the moving direction of the second transfer belt A tension roller that is provided downstream of the conveyance surface forming roller so as to be adjacent to the conveyance surface forming roller and stretches the second transfer belt; and the second transfer belt on an inner peripheral surface of the second transfer belt A driving roller that is provided downstream of the stretching roller so as to be adjacent to the stretching roller with respect to the moving direction of the driving roller and drives the second transfer belt, and the transport surface forming roller has both ends in the rotation axis direction. The tension roller is formed to have a diameter smaller than the central portion in the rotation axis direction, the stretching roller is formed to have both ends in the rotation axis direction larger in diameter than the center portion in the rotation axis direction, and the driving roller is It is characterized by being formed to have substantially the same diameter along the direction.
The image forming apparatus of the present invention includes an image carrier on which a toner image is formed, a first transfer belt to which the toner image formed on the image carrier is transferred, and a toner image from the first transfer belt onto a recording material. The transfer portion for transferring the image is formed with the first transfer belt, the endless second transfer belt that conveys the recording material to the transfer portion, and the second transfer belt is pressed from the inner peripheral surface to transfer the transfer material. And a transfer roller capable of transferring a toner image from the first transfer belt to a recording material by applying a voltage, and the transfer roller with respect to a moving direction of the second transfer belt on an inner peripheral surface of the second transfer belt A transfer surface forming roller that stretches the transfer roller and the second transfer belt to form a transfer surface of the recording material on the second transfer belt, and an inner peripheral surface of the second transfer belt. Regarding the moving direction of the second transfer belt A tension roller that is provided downstream of the conveyance surface forming roller so as to be adjacent to the conveyance surface forming roller and stretches the second transfer belt, and the conveyance surface forming roller has both ends in the rotation axis direction. The tension roller is formed with a diameter smaller than the central portion in the rotational axis direction, and the stretching roller is formed such that both end portions in the rotational axis direction are larger in diameter than the central portion in the rotational axis direction. The difference between the outer diameter and the minimum outer diameter is ΔR1, the winding angle of the second transfer belt with respect to the central portion in the rotation axis direction of the conveying surface forming roller is θ1, and the maximum outer diameter and the minimum outer diameter of the stretching roller are When the difference is ΔR2 and the winding angle of the second transfer belt with respect to the central portion in the rotation axis direction of the stretching roller is θ2, the relational expression ΔR1 × θ1 ≦ ΔR2 × θ2 is satisfied.
本発明の画像形成装置では、第二転写ベルトを張架する異なる形状の複数のローラを組み合わせることで、転写部を通過する記録材に対するしわ伸ばし効果を十分に発揮させることができる。 In the image forming apparatus of the present invention, by combining a plurality of differently shaped rollers that stretch the second transfer belt, it is possible to sufficiently exert the wrinkle-stretching effect on the recording material that passes through the transfer portion.
Claims (7)
前記像担持体に形成されたトナー像が転写される第一転写ベルトと、
前記第一転写ベルトから記録材にトナー像を転写するための転写部を前記第一転写ベルトと形成し、前記転写部に記録材を搬送する無端状の第二転写ベルトと、
前記第二転写ベルトを内周面から押圧して前記転写部を形成させ、電圧の印加により前記第一転写ベルトから記録材にトナー像を転写可能な転写ローラと、
前記第二転写ベルトの内周面で前記第二転写ベルトの移動方向に関し前記転写ローラの下流に設けられ、前記転写ローラと前記第二転写ベルトを張架して前記第二転写ベルトに記録材の搬送面を形成する搬送面形成ローラと、
前記第二転写ベルトの内周面で前記第二転写ベルトの移動方向に関し前記搬送面形成ローラに隣り合うように前記搬送面形成ローラの下流に設けられ、前記第二転写ベルトを張架する張架ローラと、
前記第二転写ベルトの内周面で前記第二転写ベルトの移動方向に関し前記張架ローラに隣り合うように前記張架ローラの下流に設けられ、前記第二転写ベルトを駆動する駆動ローラと、を備え、
前記搬送面形成ローラは、回転軸線方向の両端部が回転軸線方向の中央部よりも小さい直径に形成され、
前記張架ローラは、回転軸線方向の両端部が回転軸線方向の中央部よりも大きい直径に形成され、
前記駆動ローラは、回転軸線方向に沿って実質的に同一の直径に形成されている、
ことを特徴とする画像形成装置。 An image bearing member having the toner image Ru is formed,
A first transfer belt to which a toner image formed on the image carrier is transferred;
A transfer portion for transferring a toner image from the first transfer belt to a recording material is formed with the first transfer belt, and an endless second transfer belt for conveying the recording material to the transfer portion ;
Presses from the inner peripheral surface of the second transfer belt to form the transfer unit, and the possible transfer roller transfer bets toner image to the recording material from the first transfer belt by applying a voltage,
A recording material is provided on the inner peripheral surface of the second transfer belt and downstream of the transfer roller with respect to the moving direction of the second transfer belt, and the transfer roller and the second transfer belt are stretched over the second transfer belt. A conveyance surface forming roller for forming a conveyance surface of
A tension belt provided on the inner peripheral surface of the second transfer belt so as to be adjacent to the transport surface forming roller with respect to the moving direction of the second transfer belt, and stretches the second transfer belt. A rack roller,
A driving roller that is provided downstream of the stretching roller so as to be adjacent to the stretching roller with respect to a moving direction of the second transfer belt on an inner peripheral surface of the second transfer belt, and drives the second transfer belt; With
The transport surface forming roller is formed to have a smaller diameter at both ends in the rotational axis direction than the central portion in the rotational axis direction,
The stretching roller is formed such that both end portions in the rotation axis direction have a larger diameter than the central portion in the rotation axis direction,
The drive rollers are formed to have substantially the same diameter along the rotation axis direction.
An image forming apparatus.
前記像担持体に形成されたトナー像が転写される第一転写ベルトと、
前記第一転写ベルトから記録材にトナー像を転写するための転写部を前記第一転写ベルトと形成し、前記転写部に記録材を搬送する無端状の第二転写ベルトと、
前記第二転写ベルトを内周面から押圧して前記転写部を形成させ、電圧の印加により前記第一転写ベルトから記録材にトナー像を転写可能な転写ローラと、
前記第二転写ベルトの内周面で前記第二転写ベルトの移動方向に関し前記転写ローラの下流に設けられ、前記転写ローラと前記第二転写ベルトを張架して前記第二転写ベルトに記録材の搬送面を形成する搬送面形成ローラと、
前記第二転写ベルトの内周面で前記第二転写ベルトの移動方向に関し前記搬送面形成ローラに隣り合うように前記搬送面形成ローラの下流に設けられ、前記第二転写ベルトを張架する張架ローラと、を備え、
前記搬送面形成ローラは、回転軸線方向の両端部が回転軸線方向の中央部よりも小さい直径に形成され、
前記張架ローラは、回転軸線方向の両端部が回転軸線方向の中央部よりも大きい直径に形成され、
前記搬送面形成ローラの最大外径と最小外径の差をΔＲ１とし、前記第二転写ベルトの前記搬送面形成ローラの回転軸線方向の中央部に対する巻き付き角度をθ１とし、前記張架ローラの最大外径と最小外径の差をΔＲ２とし、前記第二転写ベルトの前記張架ローラの回転軸線方向の中央部に対する巻き付き角度をθ２とするとき、
ΔＲ１×θ１≦ΔＲ２×θ２
の関係式を満たす、
ことを特徴とする画像形成装置。 An image carrier on which a toner image is formed;
A first transfer belt to which a toner image formed on the image carrier is transferred;
A transfer portion for transferring a toner image from the first transfer belt to a recording material is formed with the first transfer belt, and an endless second transfer belt for conveying the recording material to the transfer portion;
A transfer roller capable of pressing the second transfer belt from an inner peripheral surface to form the transfer portion, and transferring a toner image from the first transfer belt to a recording material by application of a voltage;
A recording material is provided on the inner peripheral surface of the second transfer belt and downstream of the transfer roller with respect to the moving direction of the second transfer belt, and the transfer roller and the second transfer belt are stretched over the second transfer belt. A conveyance surface forming roller for forming a conveyance surface of
A tension belt provided on the inner peripheral surface of the second transfer belt so as to be adjacent to the transport surface forming roller with respect to the moving direction of the second transfer belt, and stretches the second transfer belt. A rack roller,
The transport surface forming roller is formed to have a smaller diameter at both ends in the rotational axis direction than the central portion in the rotational axis direction,
The stretching roller is formed such that both end portions in the rotation axis direction have a larger diameter than the central portion in the rotation axis direction,
The difference between the maximum outer diameter and the minimum outer diameter of the conveying surface forming roller is ΔR1, the winding angle of the second transfer belt with respect to the central portion in the rotation axis direction of the conveying surface forming roller is θ1, and the maximum of the stretching roller When the difference between the outer diameter and the minimum outer diameter is ΔR2, and the winding angle of the second transfer belt with respect to the central portion in the rotation axis direction of the stretching roller is θ2,
ΔR1 × θ1 ≦ ΔR2 × θ2
Satisfy the relationship,
Images forming device you wherein a.
０．８＜｛（Ｒ１ｍａｘ／２）×θ１−（Ｒ１ｍｉｎ／２）×θ３｝
の関係式を満たす、
ことを特徴とする請求項１又は２に記載の画像形成装置。 The maximum outer diameter of the transport surface forming roller is R1max, the minimum outer diameter is R1min, the winding angle of the second transfer belt with respect to the central portion in the rotation axis direction of the transport surface forming roller is θ1, and the transport of the second transfer belt is When the winding angle with respect to the end in the rotation axis direction of the surface forming roller is θ3,
0.8 <{(R1max / 2) × θ1− (R1min / 2) × θ3}
To satisfy the relationship,
The image forming apparatus according to claim 1 , wherein the image forming apparatus is an image forming apparatus.
の関係式を満たす、Satisfying the relational expression of
ことを特徴とする請求項３に記載の画像形成装置。The image forming apparatus according to claim 3.
Ｅ／Ｆ＞１６．３×｛（Ｒ１ｍａｘ／２）×θ１−（Ｒ１ｍｉｎ／２）×θ３｝−２．４
の関係式を満たす、
ことを特徴とする請求項３又は４に記載の画像形成装置。 When the yield strength of the transfer belt is E and the tension applied to the transfer belt is F,
E / F> 16.3 × {(R1max / 2) × θ1− (R1min / 2) × θ3} −2.4
Satisfy the relationship,
The image forming apparatus according to claim 3 , wherein the image forming apparatus is an image forming apparatus.
前記張架ローラは、回転軸線方向の中央部から両端部へ向かって連続的に直径が大きくなる逆クラウン形状の周面を有する、
ことを特徴とする請求項１乃至５のいずれか１項に記載の画像形成装置。 The transport surface forming roller has a regular crown-shaped peripheral surface whose diameter continuously decreases from the central portion in the rotation axis direction toward both end portions,
The tension roller has a reverse crown-shaped peripheral surface whose diameter continuously increases from the central portion in the rotation axis direction toward both ends .
The image forming apparatus according to any one of claims 1 to 5, characterized in that.
ことを特徴とする請求項１乃至６のいずれか１項に記載の画像形成装置。 The second transfer belt has a layer formed of a resin material or a metal material ,
The image forming apparatus according to any one of claims 1 to 6, characterized in that.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015034920A JP6552215B2 (en) | 2014-04-02 | 2015-02-25 | Image forming device |
| CN201510150567.1A CN104977830B (en) | 2014-04-02 | 2015-04-01 | Imaging device |
| US14/676,035 US9658577B2 (en) | 2014-04-02 | 2015-04-01 | Image forming apparatus having transfer belt rollers of specific shapes |
| EP15162206.5A EP2940530B1 (en) | 2014-04-02 | 2015-04-01 | Image forming apparatus |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014076284 | 2014-04-02 | ||
| JP2014076284 | 2014-04-02 | ||
| JP2015034920A JP6552215B2 (en) | 2014-04-02 | 2015-02-25 | Image forming device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2015200875A JP2015200875A (en) | 2015-11-12 |
| JP2015200875A5 true JP2015200875A5 (en) | 2018-04-12 |
| JP6552215B2 JP6552215B2 (en) | 2019-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2015011256A Pending JP2015200869A (en) | 2014-04-02 | 2015-01-23 | image forming apparatus |
| JP2015034920A Active JP6552215B2 (en) | 2014-04-02 | 2015-02-25 | Image forming device |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2015011256A Pending JP2015200869A (en) | 2014-04-02 | 2015-01-23 | image forming apparatus |
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| JP (2) | JP2015200869A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015200869A (en) * | 2014-04-02 | 2015-11-12 | キヤノン株式会社 | image forming apparatus |
| JP6351348B2 (en) * | 2014-04-18 | 2018-07-04 | キヤノン株式会社 | Image forming apparatus |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0312684A (en) * | 1989-06-09 | 1991-01-21 | Canon Inc | Image forming device |
| JP2586842Y2 (en) * | 1991-10-03 | 1998-12-14 | 桂川電機株式会社 | Fixing device |
| JPH10291672A (en) * | 1997-04-21 | 1998-11-04 | Nec Niigata Ltd | Conveyer |
| JP2001201979A (en) * | 2000-01-20 | 2001-07-27 | Fuji Xerox Co Ltd | Image fixing device |
| JP2005221757A (en) * | 2004-02-05 | 2005-08-18 | Fuji Xerox Co Ltd | Fixing device and image forming apparatus |
| US7418218B2 (en) * | 2006-02-21 | 2008-08-26 | Xerox Corporation | Conductive backer brush for electrostatic brush cleaning of a belt without a ground layer |
| WO2010024092A1 (en) * | 2008-08-29 | 2010-03-04 | コニカミノルタビジネステクノロジーズ株式会社 | Fixing device and image forming apparatus |
| JP5067898B2 (en) * | 2009-12-14 | 2012-11-07 | キヤノン株式会社 | Image forming apparatus |
| JP2011221230A (en) * | 2010-04-08 | 2011-11-04 | Konica Minolta Business Technologies Inc | Image forming apparatus |
| JP5982863B2 (en) * | 2012-02-23 | 2016-08-31 | 富士ゼロックス株式会社 | Transfer device and image forming apparatus |
| JP2015200869A (en) * | 2014-04-02 | 2015-11-12 | キヤノン株式会社 | image forming apparatus |
-
2015
- 2015-01-23 JP JP2015011256A patent/JP2015200869A/en active Pending
- 2015-02-25 JP JP2015034920A patent/JP6552215B2/en active Active
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