JP2017129850A5 - - Google Patents
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- JP2017129850A5 JP2017129850A5 JP2016241864A JP2016241864A JP2017129850A5 JP 2017129850 A5 JP2017129850 A5 JP 2017129850A5 JP 2016241864 A JP2016241864 A JP 2016241864A JP 2016241864 A JP2016241864 A JP 2016241864A JP 2017129850 A5 JP2017129850 A5 JP 2017129850A5
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- 239000002184 metal Substances 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 13
- 230000000875 corresponding Effects 0.000 claims description 8
- 230000002093 peripheral Effects 0.000 claims description 5
- 230000035897 transcription Effects 0.000 claims description 3
- 239000006258 conductive agent Substances 0.000 claims 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
Description
本発明の一態様は、移動可能に設けられ、トナー像を担持するベルト部材と、前記ベルト部材にトナー像を形成するトナー像形成ユニットと、金属軸と、前記金属軸の周りに形成された弾性層と、を有し、前記ベルト部材の外表面に接触して、前記ベルト部材に形成されたトナー像を記録材へ転写する転写ローラと、前記転写ローラの弾性層の外周面と当接する導電性ローラと、前記ベルト部材と前記導電性ローラとの間において前記転写ローラの軸を通って形成された電気経路を介して前記転写ローラに転写電流を供給する電源部と、を備え、前記導電性ローラは、画像形成領域に対応する位置に設けられた大径部と、前記導電性ローラの両端部に配置され、軸支される前記大径部よりも小径の小径部と、を有し、前記ベルト部材の移動方向と交差する幅方向に関して、前記導電性ローラの前記大径部の幅は、最大画像形成領域の幅以上で、且つ、前記転写ローラの前記弾性層の幅よりも小さい、ことを特徴とする画像形成装置である。 One embodiment of the present invention includes a belt member that is movably provided and carries a toner image, a toner image forming unit that forms a toner image on the belt member, a metal shaft, and is formed around the metal shaft . It has a elastic layer, and the contact with the outer surface of the belt member, and the transcription roller you transfer a toner image formed on the belt member to the recording material, the outer peripheral surface of the elastic layer of the transfer roller A power supply unit that supplies a transfer current to the transfer roller via an electric path formed through the shaft of the transfer roller between the belt member and the conductive roller. wherein the conductive roller has a large diameter portion which is provided at a position corresponding to the image forming region, it is disposed at both ends of the conductive roller, and the small diameter of the small-diameter portion than the large diameter portion which is rotatably supported The movement of the belt member In the width direction intersecting the width of the large diameter portion of the conductive roller is at least the width of the maximum image forming area, and, prior to less than the width of the elastic layer of Kiten shooting roller, and characterized in that Image forming apparatus .
本発明の一態様は、移動可能に設けられ、トナー像を担持するベルト部材と、前記ベルト部材にトナー像を形成するトナー像形成ユニットと、金属軸と、前記金属軸の外周に形成された弾性層とを有し、前記ベルト部材の外表面に接触して、前記ベルト部材に形成されたトナー像を記録材へ転写する転写ローラと、前記転写ローラの外周と当接する導電性ローラと、前記ベルト部材と前記導電性ローラとの間において前記転写ローラの軸を通って形成された電気経路を介して前記転写ローラに転写電流を供給する電源部と、を備え、前記導電性ローラは、画像形成領域に対応する位置に設けられた大径部と、前記導電性ローラの両端部に配置され、軸支される前記大径部よりも小径の小径部と、を有し、前記ベルト部材の移動方向と交差する幅方向に関して、前記導電性ローラの大径部の幅は、最大画像形成領域の幅以上で且つ記録材の最大サイズ幅よりも短い、ことを特徴とする画像形成装置である。 One embodiment of the present invention is formed on a belt member movably provided and carrying a toner image, a toner image forming unit for forming a toner image on the belt member, a metal shaft, and an outer periphery of the metal shaft . and an elastic layer, the contact with the outer surface of the belt member, and the transcription roller you transfer a toner image formed on the belt member to the recording material, the outer periphery abutting conductivity of the transfer roller A power supply unit for supplying a transfer current to the transfer roller via an electric path formed between the belt member and the conductive roller through an axis of the transfer roller ; roller has a large diameter portion which is provided at a position corresponding to the image forming region, the disposed at both ends of the conductive roller, a small diameter portion of diameter smaller than the large diameter portion which is pivotally supported, and Intersects the direction of movement of the belt member With respect to the direction, the width of the large-diameter portion of the conductive roller is shorter than and the maximum size width of the recording material at least the width of the maximum image formation area, it is an image forming apparatus according to claim.
本発明の一態様は、移動可能に設けられ、トナー像を担持するベルト部材と、前記ベルト部材にトナー像を形成するトナー像形成ユニットと、金属軸と、前記金属軸の周りに形成された弾性層と、を有し、前記ベルト部材の外表面に接触して、前記ベルト部材に形成されたトナー像を記録材へ転写する第１の転写ローラと、金属軸と、前記金属軸の周りに設けられた弾性層と、を備え、前記ベルト部材を挟んで前記第１の転写ローラと対向する位置に設けられた第２の転写ローラと、前記第１の転写ローラの外周面と当接する導電性ローラと、前記第２の転写ローラと前記導電性ローラとの間において前記第１の転写ローラの軸を通って形成された電気経路を介して前記第２の転写ローラに転写電流を供給する電源部と、を備え、前記導電性ローラは、画像形成領域に対応する位置に設けられた大径部と、前記導電性ローラの両端部に配置され、軸支される前記大径部よりも小径の小径部と、を有し、前記ベルト部材の移動方向と交差する幅方向に関して、前記導電性ローラの大径部の幅は、最大画像形成領域の幅以上であり、かつ、前記第１の転写ローラの弾性層が設けられている幅、もしくは、前記第２の転写ローラの弾性層が設けられている幅、もしくは前記ベルト部材のいずれか一つよりも短い、ことを特徴とする画像形成装置である。
本発明の一態様は、移動可能に設けられ、トナー像を担持するベルト部材と、前記ベルト部材にトナー像を形成するトナー像形成ユニットと、金属軸と、前記金属軸の周りに形成された弾性層と、を有し、前記ベルト部材の外表面に接触し、前記ベルト部材に形成されたトナー像を記録材へ転写する転写ローラと、前記転写ローラの弾性層の外周面と当接する導電性ローラと、前記ベルト部材と前記導電性ローラとの間において前記転写ローラの軸を通って形成された電気経路を介して前記転写ローラに転写電流を供給する電源部と、を備え、前記導電性ローラは、画像形成領域に対応する位置に設けられた大径部と、前記導電性ローラの両端部に配置され、軸支される前記大径部よりも小径の小径部と、を有し、前記ベルト部材の移動方向と交差する幅方向に関して、前記導電性ローラの前記大径部の幅は、最大画像形成領域の幅以上で、且つ、前記ベルト部材の幅よりも小さい、ことを特徴とする画像形成装置である。
One embodiment of the present invention includes a belt member that is movably provided and carries a toner image, a toner image forming unit that forms a toner image on the belt member, a metal shaft, and is formed around the metal shaft . It has a elastic layer, and the contact with the outer surface of the belt member, a first transfer roller you transfer a toner image formed on the belt member to the recording material, and a metal shaft, the metal shaft a second transfer roller includes an elastic layer, and is provided at a position facing the first transfer roller sandwiching the belt member provided around the an outer circumferential surface of the first transfer roller abutting conductive roller, before Symbol transferred to the second transfer roller via the electrical path formed through an axis of the first transfer roller between said conductive roller and second transfer roller and a power supply unit for supplying an electric current, the conductive The roller has a large-diameter portion provided at a position corresponding to the image forming area, and a small-diameter portion arranged at both ends of the conductive roller and having a smaller diameter than the large-diameter portion which is pivotally supported. The width of the large-diameter portion of the conductive roller is greater than or equal to the width of the maximum image forming area in the width direction intersecting the moving direction of the belt member, and the elastic layer of the first transfer roller is provided. and has a width, or the width elastic layer is provided in the second transfer roller or shorter than any one of said belt member, it is an image forming apparatus according to claim.
One embodiment of the present invention includes a belt member that is movably provided and carries a toner image, a toner image forming unit that forms a toner image on the belt member, a metal shaft, and is formed around the metal shaft. An elastic layer; a transfer roller that contacts an outer surface of the belt member and transfers a toner image formed on the belt member to a recording material; and a conductive roller that contacts an outer peripheral surface of the elastic layer of the transfer roller. And a power supply unit that supplies a transfer current to the transfer roller via an electric path formed between the belt member and the conductive roller through an axis of the transfer roller. The sex roller has a large-diameter portion provided at a position corresponding to the image forming area, and a small-diameter portion arranged at both ends of the conductive roller and having a smaller diameter than the large-diameter portion that is pivotally supported. Moving direction of the belt member In the width direction intersecting the width of the large diameter portion of the conductive roller is at least the width of the maximum image forming area, and the smaller than the width of the belt member, it is an image forming apparatus according to claim.
Claims (19)
前記ベルト部材にトナー像を形成するトナー像形成ユニットと、
金属軸と、前記金属軸の周りに形成された弾性層と、を有し、前記ベルト部材の外表面に接触して、前記ベルト部材に形成されたトナー像を記録材へ転写する転写ローラと、
前記転写ローラの弾性層の外周面と当接する導電性ローラと、
前記ベルト部材と前記導電性ローラとの間において前記転写ローラの軸を通って形成された電気経路を介して前記転写ローラに転写電流を供給する電源部と、を備え、
前記導電性ローラは、画像形成領域に対応する位置に設けられた大径部と、前記導電性ローラの両端部に配置され、軸支される前記大径部よりも小径の小径部と、を有し、
前記ベルト部材の移動方向と交差する幅方向に関して、前記導電性ローラの前記大径部の幅は、最大画像形成領域の幅以上で、且つ、前記転写ローラの前記弾性層の幅よりも小さい、
ことを特徴とする画像形成装置。 A belt member movably provided and carrying the toner image;
A toner image forming unit that forms a toner image on the belt member;
Has a metal shaft, and a elastic layer formed around the metal shaft, in contact with the outer surface of the belt member, transfer a toner image formed on the belt member to a recording material inversion With a photo roller,
A conductive roller to the outer peripheral surface abutting the elastic layer before Kiten shooting roller,
A power supply unit that supplies a transfer current to the transfer roller via an electric path formed through the shaft of the transfer roller between the belt member and the conductive roller ,
The conductive roller comprises a large diameter portion which is provided at a position corresponding to the image forming region, is disposed at both ends of the conductive roller, a small diameter portion of diameter smaller than the large diameter portion which is pivotally supported, the Have
In the width direction intersecting with the moving direction of the belt member, the width of the large diameter portion of the conductive roller is at least the width of the maximum image forming area, and than the width of the elastic layer prior Kiten shooting roller small,
An image forming apparatus comprising:
ことを特徴とする請求項１に記載の画像形成装置。 With respect to the width direction, the width of the large-diameter portion of the conductive roller is shorter than the width of the recording material having the maximum size.
The image forming apparatus according to claim 1, wherein:
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 conductive roller, the center of the width direction are arranged so as to correspond to the center of the width direction of the front Kiten shooting roller,
The image forming apparatus according to claim 1, wherein:
ことを特徴とする請求項１乃至３のいずれか１項に記載の画像形成装置。 Width of the respect to the width direction, the elastic layer prior Kiten copy roller is smaller than the width of the front Symbol belt member,
The image forming apparatus according to claim 1, wherein:
前記転写ローラは、前記中間転写ベルトから前記記録材にトナー像を二次転写する二次転写ローラである、
ことを特徴とする請求項１乃至４のいずれか１項に記載の画像形成装置。 The belt member is an intermediate transfer belt that carries a toner image primarily transferred from a photosensitive drum,
Before Kiten copy roller is a secondary transfer roller for transferring the secondary pre Symbol toner image from the intermediate transfer belt onto the recording material,
The image forming apparatus according to claim 1, wherein:
金属軸と、前記金属軸の周りに設けられた弾性層と、を備え、前記ベルト部材を挟んで前記第１の転写ローラと対向する位置に設けられた第２の転写ローラを備え、
前記電源部は、前記第２の転写ローラにトナーの帯電極性と同極性の電圧を印加して、前記第２の転写ローラに電流を流す第一電源と、前記導電性ローラに前記第一電源と反対極性の電圧を印加する第二電源と、を備え、
前記二次転写ローラの前記金属軸を電気的に接地電位に接続する、
ことを特徴とする請求項５に記載の画像形成装置。 The transfer roller is a first transfer roller,
A metal shaft and an elastic layer provided around the metal shaft, and a second transfer roller provided at a position facing the first transfer roller with the belt member interposed therebetween;
The power supply unit is configured to apply a voltage having the same polarity as the charging polarity of the toner to the second transfer roller and to supply a current to the second transfer roller , and a first power supply to the conductive roller. And a second power supply for applying a voltage of the opposite polarity,
Electrically connecting the metal shaft of the secondary transfer roller to a ground potential,
The image forming apparatus according to claim 5, wherein:
金属軸と、前記金属軸の周りに設けられた弾性層と、を備え、前記ベルト部材を挟んで前記第１の転写ローラと対向する位置に設けられた第２の転写ローラと、
前記第２の転写ローラを電気的に接地電位に接続する導電路と、を備え、
前記電源部は、前記導電性ローラにトナーの帯電極性と反対極性の電圧を印加して、前記第１の転写ローラの軸を介して前記第２の転写ローラに転写電流を流す、
ことを特徴とする請求項１に記載の画像形成装置。 The transfer roller is a first transfer roller,
A second transfer roller including a metal shaft and an elastic layer provided around the metal shaft, and provided at a position facing the first transfer roller with the belt member interposed therebetween;
And a conductive path connecting to electrically ground said second transfer roller,
The power supply unit applies a voltage having a polarity opposite to the charging polarity of the toner to the conductive roller, and causes a transfer current to flow to the second transfer roller via the shaft of the first transfer roller.
The image forming apparatus according to claim 1 , wherein:
前記ベルト部材にトナー像を形成するトナー像形成ユニットと、
金属軸と、前記金属軸の外周に形成された弾性層とを有し、前記ベルト部材の外表面に接触して、前記ベルト部材に形成されたトナー像を記録材へ転写する転写ローラと、
前記転写ローラの外周と当接する導電性ローラと、
前記ベルト部材と前記導電性ローラとの間において前記転写ローラの軸を通って形成された電気経路を介して前記転写ローラに転写電流を供給する電源部と、を備え、
前記導電性ローラは、画像形成領域に対応する位置に設けられた大径部と、前記導電性ローラの両端部に配置され、軸支される前記大径部よりも小径の小径部と、を有し、
前記ベルト部材の移動方向と交差する幅方向に関して、前記導電性ローラの大径部の幅は、最大画像形成領域の幅以上で且つ記録材の最大サイズ幅よりも短い、
ことを特徴とする画像形成装置。 A belt member movably provided and carrying the toner image;
A toner image forming unit that forms a toner image on the belt member;
Includes a metal shaft and an elastic layer formed on the outer periphery of the metal shaft, the contact with the outer surface of the belt member, transcription transfer a toner image formed on the belt member to the recording material Laura and
Periphery and the contact to the conductive roller of the prior Kiten shooting roller,
A power supply unit that supplies a transfer current to the transfer roller via an electric path formed through the shaft of the transfer roller between the belt member and the conductive roller ,
The conductive roller comprises a large diameter portion which is provided at a position corresponding to the image forming region, is disposed at both ends of the conductive roller, a small diameter portion of diameter smaller than the large diameter portion which is pivotally supported, the Have
Regarding the width direction intersecting with the moving direction of the belt member, the width of the large diameter portion of the conductive roller is equal to or larger than the width of the maximum image forming area and shorter than the maximum size width of the recording material.
An image forming apparatus comprising:
ことを特徴とする請求項８に記載の画像形成装置。 With respect to the width direction, both ends of the large-diameter portion of the conductive roller are located inside both ends of a region through which a recording material having a maximum size passes,
The image forming apparatus according to claim 8, wherein:
ことを特徴とする請求項８又は９に記載の画像形成装置。 Both end portions of the elastic layer before Kiten copy roller contacts the large diameter portion of the conductive roller,
The image forming apparatus according to claim 8 or 9, characterized in that.
ことを特徴とする請求項８又は９に記載の画像形成装置。 Before the elastic layer of Kiten copy rollers, ionic conductivity of the conductive agent is contained,
The image forming apparatus according to claim 8, wherein:
前記ベルト部材にトナー像を形成するトナー像形成ユニットと、
金属軸と、前記金属軸の周りに形成された弾性層と、を有し、前記ベルト部材の外表面に接触して、前記ベルト部材に形成されたトナー像を記録材へ転写する第１の転写ローラと、
金属軸と、前記金属軸の周りに設けられた弾性層と、を備え、前記ベルト部材を挟んで前記第１の転写ローラと対向する位置に設けられた第２の転写ローラと、
前記第１の転写ローラの外周面と当接する導電性ローラと、
前記第２の転写ローラと前記導電性ローラとの間において前記第１の転写ローラの軸を通って形成された電気経路を介して前記第２の転写ローラに転写電流を供給する電源部と、を備え、
前記導電性ローラは、画像形成領域に対応する位置に設けられた大径部と、前記導電性ローラの両端部に配置され、軸支される前記大径部よりも小径の小径部と、を有し、
前記ベルト部材の移動方向と交差する幅方向に関して、前記導電性ローラの大径部の幅は、最大画像形成領域の幅以上であり、かつ、前記第１の転写ローラの弾性層が設けられている幅、もしくは、前記第２の転写ローラの弾性層が設けられている幅、もしくは前記ベルト部材のいずれか一つよりも短い、
ことを特徴とする画像形成装置。 A belt member movably provided and carrying the toner image;
A toner image forming unit that forms a toner image on the belt member;
It has a metal shaft, and a elastic layer formed around the metal shaft, in contact with the outer surface of the belt member, you transfer a toner image formed on the belt member to the recording material No. One transfer roller,
A second transfer roller provided with a metal shaft and an elastic layer provided around the metal shaft, and provided at a position facing the first transfer roller with the belt member interposed therebetween;
A conductive roller that contacts an outer peripheral surface of the first transfer roller;
A power supply unit that supplies a transfer current to the second transfer roller via an electric path formed between the second transfer roller and the conductive roller through an axis of the first transfer roller ; With
The conductive roller has a large-diameter portion provided at a position corresponding to an image forming area, and a small-diameter portion having a smaller diameter than the large-diameter portion that is disposed at both ends of the conductive roller and is pivotally supported. Have
The width of the large-diameter portion of the conductive roller is greater than or equal to the width of the maximum image forming area with respect to the width direction crossing the moving direction of the belt member, and the elastic layer of the first transfer roller is provided. Width, or the width of the elastic layer of the second transfer roller is provided, or shorter than any one of the belt members,
An image forming apparatus comprising:
ことを特徴とする請求項１２に記載の画像形成装置。 The width of the large diameter portion of the conductive roller is larger than the width of the elastic layer of the first transfer roller,
The image forming apparatus according to claim 12, wherein:
ことを特徴とする請求項１２又は１３に記載の画像形成装置。 The elastic layer of the first transfer roller contains an ionic conductive agent, and the elastic layer of the second transfer roller contains carbon.
The image forming apparatus according to claim 12, wherein:
ことを特徴とする請求項１２に記載の画像形成装置。 The image forming apparatus according to claim 12, wherein:
ことを特徴とする請求項１２に記載の画像形成装置。 The image forming apparatus according to claim 12, wherein:
前記ベルト部材にトナー像を形成するトナー像形成ユニットと、 A toner image forming unit that forms a toner image on the belt member;
金属軸と、前記金属軸の周りに形成された弾性層と、を有し、前記ベルト部材の外表面に接触し、前記ベルト部材に形成されたトナー像を記録材へ転写する転写ローラと、 A metal roller, having an elastic layer formed around the metal axis, and a transfer roller that contacts an outer surface of the belt member and transfers a toner image formed on the belt member to a recording material;
前記転写ローラの弾性層の外周面と当接する導電性ローラと、 A conductive roller that contacts the outer peripheral surface of the elastic layer of the transfer roller,
前記ベルト部材と前記導電性ローラとの間において前記転写ローラの軸を通って形成された電気経路を介して前記転写ローラに転写電流を供給する電源部と、を備え、 A power supply unit that supplies a transfer current to the transfer roller via an electric path formed through the shaft of the transfer roller between the belt member and the conductive roller,
前記導電性ローラは、画像形成領域に対応する位置に設けられた大径部と、前記導電性ローラの両端部に配置され、軸支される前記大径部よりも小径の小径部と、を有し、 The conductive roller has a large-diameter portion provided at a position corresponding to an image forming area, and a small-diameter portion having a smaller diameter than the large-diameter portion that is disposed at both ends of the conductive roller and is pivotally supported. Have
前記ベルト部材の移動方向と交差する幅方向に関して、前記導電性ローラの前記大径部の幅は、最大画像形成領域の幅以上で、且つ、前記ベルト部材の幅よりも小さい、 Regarding the width direction intersecting with the moving direction of the belt member, the width of the large diameter portion of the conductive roller is equal to or larger than the width of the maximum image forming area, and smaller than the width of the belt member.
ことを特徴とする画像形成装置。 An image forming apparatus comprising:
ことを特徴とする請求項１７に記載の画像形成装置。 The image forming apparatus according to claim 17, wherein:
ことを特徴とする請求項１７に記載の画像形成装置。 The image forming apparatus according to claim 17, wherein:
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/397,178 US10452005B2 (en) | 2016-01-15 | 2017-01-03 | Image forming apparatus |
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| JP2016005717 | 2016-01-15 | ||
| JP2016005717 | 2016-01-15 |
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| JP6938145B2 JP6938145B2 (en) | 2021-09-22 |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10319745A (en) * | 1997-05-21 | 1998-12-04 | Fuji Xerox Co Ltd | Image forming device |
| JP3721829B2 (en) * | 1999-03-08 | 2005-11-30 | 富士ゼロックス株式会社 | Image forming apparatus |
| JP2005316200A (en) * | 2004-04-28 | 2005-11-10 | Kyocera Mita Corp | Transfer device for image forming apparatus |
| JP2005316199A (en) * | 2004-04-28 | 2005-11-10 | Kyocera Mita Corp | Transfer device for image forming apparatus |
| JP4560361B2 (en) * | 2004-09-15 | 2010-10-13 | 京セラミタ株式会社 | Image forming apparatus |
| JP5473291B2 (en) * | 2008-10-15 | 2014-04-16 | キヤノン株式会社 | Image forming apparatus |
| JP2014066752A (en) * | 2012-09-24 | 2014-04-17 | Fuji Xerox Co Ltd | Image forming apparatus |
| JP6357885B2 (en) * | 2014-06-03 | 2018-07-18 | 富士ゼロックス株式会社 | Image forming apparatus |
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