JPH10161489A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPH10161489A JPH10161489A JP8317664A JP31766496A JPH10161489A JP H10161489 A JPH10161489 A JP H10161489A JP 8317664 A JP8317664 A JP 8317664A JP 31766496 A JP31766496 A JP 31766496A JP H10161489 A JPH10161489 A JP H10161489A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- image forming
- magnet
- image
- magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、現像剤として磁性
トナーを用いる画像形成装置に関する。The present invention relates to an image forming apparatus using a magnetic toner as a developer.
【０００２】[0002]
【従来の技術】電子写真画像形成装置においては、像担
持体である感光体に隣接して現像器を配設し、感光体上
に形成された静電潜像を現像器によって現像してトナー
像として顕像化している。その際、現像器において現像
に供されないで本体内に飛散してしまうトナーがあっ
た。2. Description of the Related Art In an electrophotographic image forming apparatus, a developing device is disposed adjacent to a photoreceptor as an image carrier, and an electrostatic latent image formed on the photoreceptor is developed by the developing device to form a toner. It is visualized as an image. At that time, there was a toner that was not used for development in the developing device and scattered in the main body.
【０００３】そこで、図４に示すように感光ドラム１０
１の近傍にトナー吸引用ダクト１０４を設け、飛散トナ
ーを補集フィルター１１３で捕集することが行われてき
た。尚、図４の矢印はトナーを含んだ空気の流れを示
す。Therefore, as shown in FIG.
1, a toner suction duct 104 has been provided, and scattered toner has been collected by a collection filter 113. The arrows in FIG. 4 indicate the flow of air containing toner.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、図４に
示すようなトナー吸引用ダクト１０４を設けた従来の画
像形成装置では、メンテナンス間隔を広げようとする場
合、補集フィルター１１３の目詰まりを防ぐために該補
集フィルター１１３の大面積化や吸引用ファン１１４の
大型化が必要となるという問題があった。However, in the conventional image forming apparatus provided with the toner suction duct 104 as shown in FIG. 4, the clogging of the collection filter 113 is prevented when the maintenance interval is extended. Therefore, there is a problem that the area of the collection filter 113 and the size of the suction fan 114 need to be increased.
【０００５】本発明は上記問題に鑑みてなされたもの
で、その目的とする処は、トナー吸引用ダクトの補集フ
ィルターの長寿命化と清掃作業の容易化を図ることがで
きる画像形成装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide an image forming apparatus capable of extending the life of a collection filter for a toner suction duct and facilitating a cleaning operation. To provide.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、請求項１記載の発明は、像担持体と、該像担持体上
に形成された潜像を磁性トナーを用いて現像する現像手
段と、像担持体上の現像像を転写材に転写する転写手段
と、飛散トナーを含んだ空気を吸引して補集フィルター
によって飛散トナーを補集するトナー吸引用ダクトを有
する画像形成装置において、前記トナー吸引用ダクトの
内部に磁界発生手段を設けたことを特徴とする。According to one aspect of the present invention, there is provided an image bearing member and a developing means for developing a latent image formed on the image bearing member with a magnetic toner. And an image forming apparatus having a transfer unit for transferring a developed image on an image carrier to a transfer material, and a toner suction duct for sucking air containing scattered toner and collecting the scattered toner by a collection filter. A magnetic field generating means is provided inside the toner suction duct.
【０００７】請求項２記載の発明は、請求項１記載の発
明において、前記トナー吸引用ダクトを前記像担持体の
移動方向において前記現像器の下流側で、且つ、前記転
写手段の上流側に設けたことを特徴とする。According to a second aspect of the present invention, in the first aspect of the present invention, the toner suction duct is provided downstream of the developing device and upstream of the transfer means in the moving direction of the image carrier. It is characterized by having been provided.
【０００８】請求項３記載の発明は、請求項１又は２記
載の発明において、前記磁界発生手段の全面をケーシン
グで覆ったことを特徴とする。According to a third aspect of the present invention, in the first or second aspect, the entire surface of the magnetic field generating means is covered with a casing.
【０００９】請求項４記載の発明は、請求項１，２又は
３記載の発明において、前記磁界発生手段をマグネット
で構成したことを特徴とする。According to a fourth aspect of the present invention, in the first, second or third aspect, the magnetic field generating means is constituted by a magnet.
【００１０】請求項５記載の発明は、請求項４記載の発
明において、前記マグネットを、前記トナー吸引用ダク
ト内に着脱自在に装填されたマグネットホルダー内に収
納したことを特徴とする。According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the magnet is housed in a magnet holder detachably mounted in the toner suction duct.
【００１１】従って、本発明によれば、トナー吸引用ダ
クト内に吸い込まれた空気に含まれる磁性トナーの大部
分は磁界発生手段の磁力によって該磁界発生手段に吸着
され、この磁界発生手段において吸引し切れなかった磁
性トナーのみが補集フィルターで捕集されるため、補集
フィルターまで到達する磁性トナーが減少し、この結
果、補集フィルターの長寿命化が図られるとともに、該
補集フィルターの清掃や交換等のメンテナンスの間隔
（インターバル）が長くなる。Therefore, according to the present invention, most of the magnetic toner contained in the air sucked into the toner suction duct is attracted to the magnetic field generating means by the magnetic force of the magnetic field generating means. Since only the magnetic toner that could not be removed is collected by the collection filter, the amount of magnetic toner that reaches the collection filter is reduced. As a result, the life of the collection filter is extended, and Maintenance intervals such as cleaning and replacement become longer.
【００１２】又、マグネットの全面がケーシングによっ
て完全に覆われるため、トナー付着面の凹凸を少なくす
ることができ、付着トナーの清掃作業を容易化すること
ができる。Further, since the entire surface of the magnet is completely covered by the casing, the unevenness of the toner adhering surface can be reduced, and the cleaning operation of the adhering toner can be facilitated.
【００１３】[0013]
【発明の実施の形態】以下に本発明の実施の形態を添付
図面に基づいて説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００１４】図１は本発明に係る画像形成装置のトナー
吸引用ダクト部分の平断面図、図２は同画像形成装置要
部の断面図、図３は図１のＡ−Ａ線拡大断面図である。FIG. 1 is a cross-sectional plan view of a toner suction duct portion of the image forming apparatus according to the present invention, FIG. 2 is a cross-sectional view of a main part of the image forming apparatus, and FIG. 3 is an enlarged cross-sectional view taken along line AA of FIG. It is.
【００１５】先ず、図２に基づいて画像形成装置要部の
概略構成について説明する。First, a schematic configuration of a main part of the image forming apparatus will be described with reference to FIG.
【００１６】図２において、１は図示矢印方向に回転駆
動される像担持体である感光ドラムであり、該感光ドラ
ム１の周りには一次帯電器２、現像器３、トナー吸引用
ダクト４、転写分離帯電器５、クリーナユニット６が配
設されている。In FIG. 2, reference numeral 1 denotes a photosensitive drum which is an image carrier which is driven to rotate in the direction of the arrow shown in the figure. Around the photosensitive drum 1, a primary charger 2, a developing device 3, a toner suction duct 4, A transfer separation charger 5 and a cleaner unit 6 are provided.
【００１７】又、７は複数枚の転写材Ｐを収納する給紙
カセット、８は給紙カセット７から転写材Ｐを１枚ずつ
給紙する給紙ローラであり、転写材Ｐの搬送方向に（図
２の右方から左方に向かって）搬送ガイド９ａ，９ｂ、
レジストローラ１０、転写ガイド１１ａ，１１ｂ及び搬
送ベルト１２が順次配されている。Reference numeral 7 denotes a paper feed cassette for accommodating a plurality of transfer materials P, and reference numeral 8 denotes a paper feed roller for feeding the transfer materials P one by one from the paper feed cassette 7, and (From right to left in FIG. 2) transport guides 9a, 9b,
A registration roller 10, transfer guides 11a and 11b, and a conveyor belt 12 are sequentially arranged.
【００１８】ところで、前記トナー吸引用ダクト４は感
光ドラム１の回転方向に対して前記現像器３の下流であ
って、且つ、転写分離帯電器５の上流に配されており、
このトナー吸引用ダクト４には、図２に示すように、感
光ドラム１の周面に向かって開口する複数（図示例で
は、５つ）の開口部４ａが感光ドラム１の軸方向に適当
な間隔で形成されている。そして、このトナー吸引用ダ
クト４の排出部にはチャンバー４ｂが設けられており、
このチャンバー４ｂ内には補集フィルター１３が収納さ
れ、チャンバー４ｂの開口部には吸引ファン１４が設置
されている。Incidentally, the toner suction duct 4 is disposed downstream of the developing device 3 and upstream of the transfer separation charging device 5 with respect to the rotation direction of the photosensitive drum 1.
As shown in FIG. 2, the toner suction duct 4 has a plurality of (five in the illustrated example) openings 4 a that open toward the peripheral surface of the photosensitive drum 1. It is formed at intervals. A chamber 4b is provided at a discharge portion of the toner suction duct 4.
The collection filter 13 is housed in the chamber 4b, and a suction fan 14 is installed in the opening of the chamber 4b.
【００１９】又、トナー吸引用ダクト４内にはマグネッ
トホルダー１５が着脱自在に装填されており、このマグ
ネットホルダー１４内には磁界発生手段であるマグネッ
ト１６が収納されている。尚、図３に示すように、マグ
ネット１６はマグネットホルダー１５によってその全面
が完全に覆われている。A magnet holder 15 is detachably mounted in the toner suction duct 4, and a magnet 16 serving as a magnetic field generating means is accommodated in the magnet holder 14. As shown in FIG. 3, the entire surface of the magnet 16 is completely covered by the magnet holder 15.
【００２０】次に、画像形成装置の作用を説明する。Next, the operation of the image forming apparatus will be described.
【００２１】図２の矢印方向に回転する感光ドラム１は
一次帯電器２によってその表面が一様に帯電され、不図
示の光学系からの画像光Ｌがミラー１７等によって反射
されて感光ドラム１上に照射されると、該感光ドラム１
上には静電潜像が形成される。そして、この静電潜像は
現像器３において現像剤である磁性トナーを用いて現像
されてトナー像として顕像化される。The surface of the photosensitive drum 1 rotating in the direction of the arrow in FIG. 2 is uniformly charged by the primary charger 2, and image light L from an optical system (not shown) is reflected by the mirror 17 and the like, and the photosensitive drum 1 is rotated. When irradiated on the photosensitive drum 1,
An electrostatic latent image is formed thereon. Then, the electrostatic latent image is developed in a developing device 3 using a magnetic toner as a developer, and is visualized as a toner image.
【００２２】一方、給紙カセット７内の転写材Ｐは給紙
ローラ８によって１枚ずつ送り出され、搬送ガイド９
ａ，９ｂに沿ってレジストローラ１０まで搬送され、レ
ジストローラ１０によって適当なタイミングで転写ガイ
ド１１ａ，１１ｂに沿って感光ドラム１と転写分離帯電
器５との間の転写部に供給される。そして、転写分離帯
電器５の作用によって、この転写材Ｐ上には感光ドラム
１上のトナー像が転写され、トナー像の転写を受けた転
写材Ｐは転写分離帯電器５の作用によって感光ドラム１
から分離されて搬送ベルト１２によって不図示の定着器
へと搬送され、定着器によってトナー像の定着を受けた
後、最終的に装置外へ排出される。On the other hand, the transfer material P in the paper feed cassette 7 is sent out one by one by a paper feed roller
The transfer roller 11 is conveyed to the registration roller 10 along the transfer rollers 11a and 11b and is supplied to the transfer section between the photosensitive drum 1 and the transfer separation charger 5 along the transfer guides 11a and 11b at an appropriate timing. The toner image on the photosensitive drum 1 is transferred onto the transfer material P by the operation of the transfer / separation charger 5, and the transfer material P to which the toner image has been transferred is moved by the operation of the transfer / separation charger 5. 1
The toner image is conveyed to a fixing device (not shown) by the conveyance belt 12 and is fixed to the toner image by the fixing device.
【００２３】ところで、現像器３のマグネットスリーブ
３ａと感光ドラム１との間には僅かな隙間が形成されて
おり、この隙間のために微粉体である磁性トナーが浮遊
状態で外部に漏れ出てしまう。この飛散トナーによる本
体内部の汚染を防ぐため、トナー吸引用ダクト４に設置
された前記吸引ファン１４を駆動して浮遊状態の磁性ト
ナーを含んだ空気をトナー吸引用ダクト４に吸い込む。A small gap is formed between the magnet sleeve 3a of the developing device 3 and the photosensitive drum 1, and the magnetic toner, which is a fine powder, leaks out in a floating state due to the gap. I will. In order to prevent the inside of the main body from being contaminated by the scattered toner, the suction fan 14 installed in the toner suction duct 4 is driven to suck air containing the magnetic toner in a floating state into the toner suction duct 4.
【００２４】而して、トナー吸引用ダクト４内に吸い込
まれた空気に含まれる磁性トナーの大部分はマグネット
ホルダー１５内のマグネット１６の磁力によって該マグ
ネット１６に吸着され、このマグネット１６において吸
引し切れなかった磁性トナーは補集フィルター１３で捕
集され、磁性トナーを含まない空気のみがトナー吸引用
ダクト４から放出される。Most of the magnetic toner contained in the air sucked into the toner suction duct 4 is attracted to the magnet 16 by the magnetic force of the magnet 16 in the magnet holder 15, and is attracted by the magnet 16. The magnetic toner that has not been cut is collected by the collection filter 13, and only air that does not contain the magnetic toner is discharged from the toner suction duct 4.
【００２５】従って、補集フィルター１３まで到達する
磁性トナーが減少するため、補集フィルター１３の長寿
命化が図られるとともに、該補集フィルター１３の清掃
や交換等のメンテナンスの間隔（インターバル）が長く
なる。Accordingly, since the amount of magnetic toner that reaches the collection filter 13 is reduced, the life of the collection filter 13 is extended, and the interval of maintenance such as cleaning and replacement of the collection filter 13 is reduced. become longer.
【００２６】又、マグネットホルダー１５がマグネット
１６を完全に囲うことにより、トナー付着面の凹凸を少
なくすることができ、付着トナーの清掃を容易に行うこ
とができる。Further, since the magnet holder 15 completely surrounds the magnet 16, the unevenness of the toner adhering surface can be reduced, and the adhering toner can be easily cleaned.
【００２７】[0027]
【発明の効果】以上の説明で明らかなように、本発明に
よれば、像担持体と、該像担持体上に形成された潜像を
磁性トナーを用いて現像する現像手段と、像担持体上の
現像像を転写材に転写する転写手段と、飛散トナーを含
んだ空気を吸引して補集フィルターによって飛散トナー
を補集するトナー吸引用ダクトを有する画像形成装置に
おいて、前記トナー吸引用ダクトの内部に磁界発生手段
を設けたため、トナー吸引用ダクトの補集フィルターの
長寿命化と清掃作業の容易化を図ることができるという
効果が得られる。As is apparent from the above description, according to the present invention, an image bearing member, a developing means for developing a latent image formed on the image bearing member with a magnetic toner, and an image bearing member are provided. An image forming apparatus comprising: a transfer unit for transferring a developed image on a body to a transfer material; and a toner suction duct for sucking air containing scattered toner and collecting the scattered toner by a collection filter. Since the magnetic field generating means is provided inside the duct, it is possible to obtain an effect that the life of the collection filter of the toner suction duct can be prolonged and the cleaning operation can be facilitated.
【図１】本発明に係る画像形成装置のトナー吸引用ダク
ト部分の平断面図である。FIG. 1 is a plan sectional view of a toner suction duct portion of an image forming apparatus according to the present invention.
【図２】本発明に係る画像形成装置要部の断面図であ
る。FIG. 2 is a sectional view of a main part of the image forming apparatus according to the present invention.
【図３】図１のＡ−Ａ線拡大断面図である。FIG. 3 is an enlarged sectional view taken along line AA of FIG. 1;
【図４】従来の画像形成装置のトナー吸引用ダクト部分
の平断面図である。FIG. 4 is a plan sectional view of a toner suction duct portion of a conventional image forming apparatus.
１ 感光ドラム（像担持体） ３ 現像器（現像手段） ４ トナー吸引用ダクト ５ 転写分離帯電器（転写手段） １３ 補集フィルター １５ マグネットホルダー（ケーシング） １６ マグネット（磁界発生手段） Ｐ 転写材 REFERENCE SIGNS LIST 1 photosensitive drum (image carrier) 3 developing device (developing means) 4 toner suction duct 5 transfer separation charger (transfer means) 13 collection filter 15 magnet holder (casing) 16 magnet (magnetic field generating means) P transfer material
Claims (5)
潜像を磁性トナーを用いて現像する現像手段と、像担持
体上の現像像を転写材に転写する転写手段と、飛散トナ
ーを含んだ空気を吸引して補集フィルターによって飛散
トナーを補集するトナー吸引用ダクトを有する画像形成
装置において、 前記トナー吸引用ダクトの内部に磁界発生手段を設けた
ことを特徴とする画像形成装置。An image carrier, a developing unit for developing a latent image formed on the image carrier using a magnetic toner, a transfer unit for transferring a developed image on the image carrier to a transfer material, An image forming apparatus having a toner suction duct for sucking air containing scattered toner and collecting the scattered toner by a collection filter, wherein a magnetic field generating means is provided inside the toner suction duct. Image forming device.
の移動方向において前記現像器の下流側で、且つ、前記
転写手段の上流側に設けたことを特徴とする請求項１記
載の画像形成装置。2. The image forming apparatus according to claim 1, wherein the toner suction duct is provided downstream of the developing device in the moving direction of the image carrier and upstream of the transfer unit. apparatus.
覆っ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。3. The image forming apparatus according to claim 1, wherein an entire surface of said magnetic field generating means is covered by a casing.
れることを特徴とする請求項１，２又は３記載の画像形
成装置。4. An image forming apparatus according to claim 1, wherein said magnetic field generating means comprises a magnet.
クト内に着脱自在に装填されたマグネットホルダー内に
収納されることを特徴とする請求項４記載の画像形成装
置。5. The image forming apparatus according to claim 4, wherein the magnet is housed in a magnet holder detachably mounted in the toner suction duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8317664A JPH10161489A (en) | 1996-11-28 | 1996-11-28 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8317664A JPH10161489A (en) | 1996-11-28 | 1996-11-28 | Image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10161489A true JPH10161489A (en) | 1998-06-19 |
Family
ID=18090661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8317664A Pending JPH10161489A (en) | 1996-11-28 | 1996-11-28 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10161489A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004093581A (en) * | 2002-07-11 | 2004-03-25 | Ricoh Co Ltd | Image forming apparatus |
| US7266323B2 (en) * | 2005-04-21 | 2007-09-04 | Xerox Corporation | Manifold for toner collection and contamination control in xerographic process developer housing |
| JP2011002594A (en) * | 2009-06-18 | 2011-01-06 | Konica Minolta Business Technologies Inc | Image forming apparatus |
| JP2011186126A (en) * | 2010-03-08 | 2011-09-22 | Konica Minolta Business Technologies Inc | Image forming apparatus |
| JP2013080197A (en) * | 2011-09-19 | 2013-05-02 | Ricoh Co Ltd | Developing device and image forming apparatus |
-
1996
- 1996-11-28 JP JP8317664A patent/JPH10161489A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004093581A (en) * | 2002-07-11 | 2004-03-25 | Ricoh Co Ltd | Image forming apparatus |
| US7266323B2 (en) * | 2005-04-21 | 2007-09-04 | Xerox Corporation | Manifold for toner collection and contamination control in xerographic process developer housing |
| JP2011002594A (en) * | 2009-06-18 | 2011-01-06 | Konica Minolta Business Technologies Inc | Image forming apparatus |
| JP2011186126A (en) * | 2010-03-08 | 2011-09-22 | Konica Minolta Business Technologies Inc | Image forming apparatus |
| US8571435B2 (en) | 2010-03-08 | 2013-10-29 | Konica Minolta Business Technologies, Inc. | Image forming apparatus that prevents toner from escaping the developing area |
| JP2013080197A (en) * | 2011-09-19 | 2013-05-02 | Ricoh Co Ltd | Developing device and image forming apparatus |
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