JP2009037085A5 - - Google Patents
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- JP2009037085A5 JP2009037085A5 JP2007202559A JP2007202559A JP2009037085A5 JP 2009037085 A5 JP2009037085 A5 JP 2009037085A5 JP 2007202559 A JP2007202559 A JP 2007202559A JP 2007202559 A JP2007202559 A JP 2007202559A JP 2009037085 A5 JP2009037085 A5 JP 2009037085A5
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- 239000000969 carrier Substances 0.000 claims description 21
- 238000011084 recovery Methods 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 5
- 230000032258 transport Effects 0.000 claims 28
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
Description
上記目的を達成するために、請求項１の発明は、磁性キャリアとトナーとからなる２成分現像剤を表面上に担持して回転し、潜像担持体と対向する箇所で該潜像担持体の表面の潜像にトナーを供給して現像する現像剤担持体と、該現像剤担持体の軸線方向に沿って現像剤を搬送し、該現像剤担持体に現像剤を供給する現像剤供給搬送部材を備えた現像剤供給搬送路と、該潜像担持体と対向する箇所を通過後の該現像剤担持体上から回収された該現像剤を該現像剤担持体の軸線方向に沿って、且つ、該現像剤供給搬送部材と同方向に搬送する現像剤回収搬送部材を備えた現像剤回収搬送路と、現像に用いられずに該現像剤供給搬送路の搬送方向の下流側まで搬送された余剰現像剤と、該現像剤担持体から回収され該現像剤回収搬送路の搬送方向の下流側まで搬送された回収現像剤との供給を受け、該現像剤担持体の軸線方向に沿って、且つ、該余剰現像剤と該回収現像剤とを攪拌しながら該現像剤供給搬送部材とは逆方向に搬送する現像剤攪拌搬送部材を備え、該現像剤を該現像剤供給搬送路に供給する現像剤攪拌搬送路とを有し、該現像剤攪拌搬送路と該現像剤回収搬送路とは略同じ高さに設けられ、該現像剤供給搬送路は他の２つの該現像剤搬送路の上方に位置するように設けられ、該現像剤搬送路にトナーの補給がなされる現像装置において、前記現像剤回収搬送路上流側に比べて現像剤回収搬送路下流側の現像剤回収搬送路の断面積を大きくしたことを特徴とするものである。
また、請求項２の発明は、請求項１の現像装置において、前記現像剤攪拌搬送路と前記現像剤供給搬送路とは仕切り部材により仕切られており、該仕切り部材に設けた攪拌現像剤開口部を介して前記現像剤攪拌搬送路から、前記現像剤供給搬送路へ現像剤を受け渡すことを特徴とするものである。
また、請求項３の発明は、請求項１または２の現像装置において、該現像剤回収搬送路、該現像剤供給搬送路及び該現像剤攪拌搬送路からなる３つの現像剤搬送路をそれぞれ仕切り部材により仕切ったことを特徴とするものである。
また、請求項４の発明は、請求項１乃至３いずれかの現像装置において、前記現像剤攪拌搬送部材は、現像に用いられずに前記現像剤供給搬送路の搬送方向の最下流側まで搬送された余剰現像剤と、前記現像剤担持体から回収され前記現像剤回収搬送路の搬送方向の最下流側まで搬送された回収現像剤との供給を受け、現像剤担持体の軸線方向に沿って、且つ、該余剰現像剤と該回収現像剤とを攪拌しながら該現像剤供給搬送部材とは逆方向に搬送することを特徴とするものである。
また、請求項５の発明は、請求項１乃至４いずれかの現像装置において、前記現像剤回収搬送路上流から、少なくとも前記現像剤回収搬送路中央部まで現像剤回収搬送路内の空間を埋める埋め部材を設けたことを特徴とするものである。
また、請求項６の発明は、請求項１乃至５いずれかの現像装置において、前記現像剤回収搬送路上流側に比べて、前記現像剤回収搬送路下流側の現像剤搬送速度が速くなるよう現像剤回収搬送部材を構成したことを特徴とするものである。
また、請求項７の発明は、請求項６の現像装置において、前記現像剤回収搬送部材は、回転数が６００［ｒｐｍ］以上で回転する回収スクリュウであって、前記回収スクリュウの現像剤搬送方向下流側のスクリュウピッチを、現像剤搬送方向上流側よりも短くしたことを特徴とするものである。
また、請求項８の発明は、請求項１乃至７いずれかの現像装置において、前記現像剤供給搬送路を、前記現像剤攪拌搬送路に対して斜め上方に設けたことを特徴とするものである。
また、請求項９の発明は、少なくとも潜像担持体と、該潜像担持体表面を帯電させるための帯電手段と、該潜像担持体上に静電潜像を形成するための潜像形成手段と、該静電潜像を現像してトナー像化するための現像手段とを有する画像形成装置において、前記現像手段として、請求項１乃至８いずれかの現像装置を用いることを特徴とするものである。
In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that a two-component developer comprising a magnetic carrier and a toner is carried on the surface and rotated, and the latent image carrier is located at a position facing the latent image carrier. A developer carrying member that supplies toner to the latent image on the surface of the developer for development, and a developer supply that conveys the developer along the axial direction of the developer carrying member and supplies the developer to the developer carrying member The developer recovered from the developer carrying body after passing through the developer supply carrying path provided with the carrying member and the portion facing the latent image carrying body along the axial direction of the developer carrying body. and, a developer collection conveyance path with the developer recovery conveying member for conveying the developer supply conveyance member in the same direction, to the lower stream side in the transport direction of the developer supply conveyance path without being used for development and it conveyed excess developer, the conveyance direction of the developer collection conveyance path is recovered from the developer carrying member Supplied with conveyed collected developer to the lower stream side, along the axial direction of the developer carrying member, and, the developer supply conveyance member while stirring and the excess developer and the collected developer comprises a developer stirring and conveying member for conveying in the opposite direction to the, a developer and a developer stirring and conveying path for supplying the developer supply conveyance path, the developer agitation path and developer collection conveyance The developer supply path is provided at substantially the same height as the path, the developer supply path is positioned above the other two developer paths, and toner is supplied to the developer path. The apparatus is characterized in that the cross-sectional area of the developer recovery transport path on the downstream side of the developer recovery transport path is made larger than that on the upstream side of the developer recovery transport path.
According to a second aspect of the present invention, in the developing device of the first aspect, the developer agitation transport path and the developer supply transport path are partitioned by a partition member, and the stirring developer opening provided in the partition member The developer is delivered from the developer stirring and conveying path to the developer supply and conveying path through a section.
According to a third aspect of the present invention, in the developing device according to the first or second aspect , the three developer conveyance paths including the developer recovery conveyance path, the developer supply conveyance path, and the developer agitation conveyance path are partitioned. It is characterized by being partitioned by a member.
According to a fourth aspect of the present invention, in the developing device according to any one of the first to third aspects, the developer agitating and conveying member is not used for development and is conveyed to the most downstream side in the conveying direction of the developer supply conveying path. The supplied excess developer and the recovered developer recovered from the developer carrier and transported to the most downstream side in the transport direction of the developer recovery transport path are supplied along the axial direction of the developer carrier. In addition, the excess developer and the recovered developer are conveyed in the opposite direction to the developer supply and conveyance member while stirring.
The invention of claim 5, in any one of the developing apparatus 請 Motomeko 1 to 4, from the developer collection conveyance path upstream, a space of at least the developer collection conveyance path the developer collection conveyance path to the central portion A filling member for filling is provided.
According to a sixth aspect of the present invention, in the developing device according to any one of the first to fifth aspects, the developer conveyance speed on the downstream side of the developer collection conveyance path is higher than that on the upstream side of the developer collection conveyance path. The developer collecting and conveying member is configured.
According to a seventh aspect of the present invention, in the developing device of the sixth aspect , the developer collecting and conveying member is a collecting screw that rotates at a rotational speed of 600 [rpm] or more, and the developer conveying direction of the collecting screw. The screw pitch on the downstream side is shorter than that on the upstream side in the developer conveyance direction.
The invention of claim 8 is characterized in that, in the developing device according to any one of claims 1 to 7 , the developer supply transport path is provided obliquely above the developer stirring transport path. is there.
According to a ninth aspect of the present invention, at least a latent image carrier, a charging means for charging the surface of the latent image carrier, and formation of a latent image for forming an electrostatic latent image on the latent image carrier. means, in an image forming apparatus having a developing means for toners Zoka by developing the electrostatic latent image, as the developing means, characterized by using one of the developing apparatus according to claim 1 to 8 Is.
Claims (9)
該現像剤担持体の軸線方向に沿って現像剤を搬送し、該現像剤担持体に現像剤を供給する現像剤供給搬送部材を備えた現像剤供給搬送路と、
該潜像担持体と対向する箇所を通過後の該現像剤担持体上から回収された該現像剤を該現像剤担持体の軸線方向に沿って、且つ、該現像剤供給搬送部材と同方向に搬送する現像剤回収搬送部材を備えた現像剤回収搬送路と、
現像に用いられずに該現像剤供給搬送路の搬送方向の下流側まで搬送された余剰現像剤と、該現像剤担持体から回収され該現像剤回収搬送路の搬送方向の下流側まで搬送された回収現像剤との供給を受け、該現像剤担持体の軸線方向に沿って、且つ、該余剰現像剤と該回収現像剤とを攪拌しながら該現像剤供給搬送部材とは逆方向に搬送する現像剤攪拌搬送部材を備え、該現像剤を該現像剤供給搬送路に供給する現像剤攪拌搬送路とを有し、
該現像剤攪拌搬送路と該現像剤回収搬送路とは略同じ高さに設けられ、該現像剤供給搬送路は他の２つの該現像剤搬送路の上方に位置するように設けられ、該現像剤搬送路にトナーの補給がなされる現像装置において、
前記現像剤回収搬送路上流側に比べて現像剤回収搬送路下流側の現像剤回収搬送路の断面積を大きくしたことを特徴とする現像装置。 A two-component developer comprising a magnetic carrier and a toner is carried on the surface and rotated, and the developer is developed by supplying toner to the latent image on the surface of the latent image carrier at a location facing the latent image carrier. A carrier,
A developer supply transport path including a developer supply transport member that transports the developer along the axial direction of the developer support and supplies the developer to the developer support;
The developer recovered from the developer carrier after passing through the portion facing the latent image carrier is along the axial direction of the developer carrier and in the same direction as the developer supply / conveying member. A developer recovery transport path including a developer recovery transport member for transporting
And excess developer conveyed to the lower stream side in the transport direction of the developer supply conveyance path without being used for development, to the lower stream side in the transport direction of the recovered from the developer carrying member the developer collection conveyance path Receiving supply of the collected developer that has been conveyed, along the axial direction of the developer carrier, and in the direction opposite to the developer supply and conveying member while stirring the excess developer and the collected developer A developer agitating and conveying member for conveying the developer to the developer supplying and conveying path, and a developer agitating and conveying path for supplying the developer to the developer supplying and conveying path ,
Provided substantially at the same height with the developer agitation path and the developer collection conveyance path, the developer supply conveyance path is provided so as to be positioned above the other two of the developer conveyance path, the In a developing device in which toner is replenished to the developer conveyance path,
A developing device having a larger cross-sectional area of a developer recovery transport path on the downstream side of the developer recovery transport path than on the upstream side of the developer recovery transport path.
前記現像剤攪拌搬送路と前記現像剤供給搬送路とは仕切り部材により仕切られており、該仕切り部材に設けた攪拌現像剤開口部を介して前記現像剤攪拌搬送路から、前記現像剤供給搬送路へ現像剤を受け渡すことを特徴とする現像装置。The developer agitation transport path and the developer supply transport path are partitioned by a partition member, and the developer supply transport from the developer agitation transport path via a stirring developer opening provided in the partition member. A developing device for delivering a developer to a path.
該現像剤回収搬送路、該現像剤供給搬送路及び該現像剤攪拌搬送路からなる３つの現像剤搬送路をそれぞれ仕切り部材により仕切ったことを特徴とする現像装置。3. A developing device characterized in that three developer transport paths comprising the developer recovery transport path, the developer supply transport path, and the developer agitation transport path are each partitioned by a partition member.
前記現像剤攪拌搬送部材は、現像に用いられずに前記現像剤供給搬送路の搬送方向の最下流側まで搬送された余剰現像剤と、前記現像剤担持体から回収され前記現像剤回収搬送路の搬送方向の最下流側まで搬送された回収現像剤との供給を受け、現像剤担持体の軸線方向に沿って、且つ、該余剰現像剤と該回収現像剤とを攪拌しながら該現像剤供給搬送部材とは逆方向に搬送することを特徴とする現像装置。The developer agitating / conveying member is not used for development and is transported to the most downstream side in the transport direction of the developer supply transport path, and the developer recovery transport path recovered from the developer carrier. The developer is supplied with the recovered developer conveyed to the most downstream side in the conveying direction of the developer, and the developer is stirred along the axial direction of the developer carrier and the excess developer and the recovered developer. A developing device that transports in a direction opposite to a supply transport member.
前記現像剤回収搬送路上流から、少なくとも前記現像剤回収搬送路中央部まで現像剤回収搬送路内の空間を埋める埋め部材を設けたことを特徴とする画像形成装置。 請 Motomeko 1 to 4 in any of the developing device,
An image forming apparatus comprising: a filling member that fills a space in the developer recovery transport path from the upstream of the developer recovery transport path to at least a central portion of the developer recovery transport path.
前記現像剤回収搬送路上流側に比べて、前記現像剤回収搬送路下流側の現像剤搬送速度が速くなるよう現像剤回収搬送部材を構成したことを特徴とする現像装置。 The developing device according to any one of claims 1 to 5 ,
2. A developing device comprising: a developer collecting and conveying member configured to increase a developer conveying speed on a downstream side of the developer collecting and conveying path as compared with an upstream side of the developer collecting and conveying path.
前記現像剤回収搬送部材は、回転数が６００［ｒｐｍ］以上で回転する回収スクリュウであって、
前記回収スクリュウの現像剤搬送方向下流側のスクリュウピッチを、現像剤搬送方向上流側よりも短くしたことを特徴とする現像装置。 The developing device according to claim 6 .
The developer collecting and conveying member is a collecting screw that rotates at a rotation speed of 600 [rpm] or more,
A developing device characterized in that a screw pitch on the downstream side in the developer transport direction of the recovery screw is made shorter than that on the upstream side in the developer transport direction.
前記現像剤供給搬送路を、前記現像剤攪拌搬送路に対して斜め上方に設けたことを特徴とする現像装置。 The developing device according to any one of claims 1 to 7 ,
2. A developing apparatus according to claim 1, wherein the developer supply / conveyance path is provided obliquely above the developer agitation / conveyance path.
該潜像担持体表面を帯電させるための帯電手段と、
該潜像担持体上に静電潜像を形成するための潜像形成手段と、
該静電潜像を現像してトナー像化するための現像手段とを有する画像形成装置において、
前記現像手段として、請求項１乃至８いずれかの現像装置を用いることを特徴とする画像形成装置。 At least a latent image carrier;
Charging means for charging the surface of the latent image carrier;
Latent image forming means for forming an electrostatic latent image on the latent image carrier;
In an image forming apparatus having developing means for developing the electrostatic latent image into a toner image,
Wherein as a developing unit, an image forming apparatus, which comprises using one of the developing apparatus according to claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007202559A JP5033534B2 (en) | 2007-08-03 | 2007-08-03 | Developing device and image forming apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007202559A JP5033534B2 (en) | 2007-08-03 | 2007-08-03 | Developing device and image forming apparatus |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2009037085A JP2009037085A (en) | 2009-02-19 |
| JP2009037085A5 true JP2009037085A5 (en) | 2011-12-15 |
| JP5033534B2 JP5033534B2 (en) | 2012-09-26 |
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| JP2007202559A Expired - Fee Related JP5033534B2 (en) | 2007-08-03 | 2007-08-03 | Developing device and image forming apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2011170288A (en) * | 2010-02-22 | 2011-09-01 | Ricoh Co Ltd | Developing device and image forming apparatus |
| JP5958801B2 (en) * | 2011-09-19 | 2016-08-02 | 株式会社リコー | Developing device and image forming apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07104574A (en) * | 1993-10-03 | 1995-04-21 | Ricoh Co Ltd | Developing device |
| JPH117195A (en) * | 1997-06-17 | 1999-01-12 | Minolta Co Ltd | Developing device |
| JPH11167260A (en) * | 1997-12-03 | 1999-06-22 | Toshiba Corp | Developing device |
| JP2007011004A (en) * | 2005-06-30 | 2007-01-18 | Ricoh Co Ltd | Image forming apparatus |
| JP4672509B2 (en) * | 2005-10-03 | 2011-04-20 | 株式会社リコー | Developing device and image forming apparatus |
| JP2007183572A (en) * | 2005-12-05 | 2007-07-19 | Ricoh Co Ltd | Developing device and image forming apparatus |
| JP5230115B2 (en) * | 2007-03-14 | 2013-07-10 | キヤノン株式会社 | Development method |
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