JPH0723810Y2 - Development device - Google Patents
Development deviceInfo
- Publication number
- JPH0723810Y2 JPH0723810Y2 JP1988135006U JP13500688U JPH0723810Y2 JP H0723810 Y2 JPH0723810 Y2 JP H0723810Y2 JP 1988135006 U JP1988135006 U JP 1988135006U JP 13500688 U JP13500688 U JP 13500688U JP H0723810 Y2 JPH0723810 Y2 JP H0723810Y2
- Authority
- JP
- Japan
- Prior art keywords
- toner
- magnet
- developing
- roll
- developing roll
- 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.)
- Expired - Lifetime
Links
- 239000012779 reinforcing material Substances 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は現像装置より飛散あるいはこぼれた一成分現像
剤を捕獲・回収するようにした現像装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a developing device for capturing and collecting a one-component developer scattered or spilled from the developing device.
従来、一成分現像装置として、第３図の断面図に示す様
な構成の装置が知られている。以下、この装置について
第３図を参照して説明する。Conventionally, as a one-component developing device, a device having a structure as shown in the sectional view of FIG. 3 is known. Hereinafter, this device will be described with reference to FIG.
この現像装置（１）は一成分磁性トナー（２）を有する
ホツパー（３）、マグネツトロール（４）およびプラス
チツクスリーブ（５）からなる現像ロール（６）、現像
ロール（６）に圧接され、現像ロール（６）上にトナー
を薄層状に形成及び摩擦帯電させる層形成部材（７）お
よび現像ロール（６）にバイアス電圧を印加し、帯電ト
ナーを感光体（８）上の静電潜像に現像するための直流
重畳交流電源（９）から概略構成されている。This developing device (1) is brought into pressure contact with a developing roll (6) comprising a hopper (3) having a one-component magnetic toner (2), a magnet roll (4) and a plastic sleeve (5), and a developing roll (6). A bias voltage is applied to the developing roller (6) and the layer forming member (7) for forming and triboelectrifying toner in a thin layer on the developing roller (6), and the charged toner is electrostatic latent image on the photoconductor (8). It is roughly composed of a DC superimposing AC power source (9) for developing.
この現像装置（１）の構成では、現像時間の経過に伴
い、現像中、電気的に強制飛翔されたトナーが感光体
（８）と現像ロール（６）との間の空間を往復運動を行
うわけであるが、感光体（８）に電気的に吸引されず、
かつ現像ロール（６）にも吸引されなかつた浮遊トナー
（2a）が行き場を失い複写装置内に飛散し、装置内を汚
してしまい、又装置内を通過する用紙上に付着し良好な
画像が得られないといつた不具合が発生した。In the configuration of the developing device (1), the toner, which is forcibly electrically ejected, reciprocates in the space between the photoconductor (8) and the developing roll (6) during development as the developing time elapses. However, it is not electrically attracted to the photoconductor (8),
In addition, the floating toner (2a) that is not sucked into the developing roll (6) loses its place and scatters inside the copying machine, stains the inside of the copying machine, and adheres to the paper passing through the inside of the copying machine to form a good image. If I couldn't get it, something went wrong.
又、例えば、層形成部材（７）の圧力によりプラスクチ
ツスリーブ（５）が変形する等により感光体（８）と現
像ロール（６）の隙間が変動する等の原因により、現像
ロール（６）と層形成部材（７）との摩擦帯電時に、帯
電不良や逆極性に帯電した現像剤が飛翔不良あるいは飛
翔せず現像ロール（６）から感光体へ吸引されずそのま
ま落下する遊離するトナー（2b）が前記と同様の不具合
を発生させた。Further, for example, the developing roll (6) may be deformed due to a change in the clearance between the photoconductor (8) and the developing roll (6) due to deformation of the plastic sleeve (5) due to the pressure of the layer forming member (7). ) And the layer forming member (7) during triboelectrification, the developer which is not sufficiently charged or does not fly and is not attracted from the developing roll (6) to the photoconductor and is released as it is from the developing roller (6). 2b) caused the same trouble as above.
本考案の目的は、複写機内の汚れおよび画像の汚れを防
止すると共に、汚れの原因となった現像剤を効率よく回
収・再利用できる一成分現像装置を提供することにあ
る。An object of the present invention is to provide a one-component developing device capable of preventing stains in a copying machine and stains of an image and efficiently collecting and reusing the developer causing the stains.
本考案は、浮遊または遊離する一成分現像剤を捕獲する
磁石を現像装置の下方部に設け、磁石の磁力を対向する
現像ロールの磁力よりも低くかつ現像ロールに向くよう
にし、前記磁石に捕獲された現像剤が対向する感光体に
接触する事なく、前記現像ロールと前記磁石間で現像剤
の穂立ちを形成させ、現像装置内に回収されるようにし
た事を特徴とする現像装置であり、これにより上記課題
を解決できる。According to the present invention, a magnet for capturing floating or freed one-component developer is provided in the lower part of the developing device so that the magnetic force of the magnet is lower than the magnetic force of the opposing developing roll and is directed to the developing roll, and is captured by the magnet. A developing device characterized in that a developer spike is formed between the developing roll and the magnet without being brought into contact with the opposed photoconductor, and is collected in the developing device. Therefore, the above problem can be solved.
本考案の現像装置の具体的一例を第１図にその断面を示
した様に、本考案の現像装置（10）は、一成分トナー
（２）を有するホツパー（３）、マグネツトロール
（４）と補強材（12）と、導電性接着剤（13）とプラス
チツクスリーブ（５）とからなる現像ロール（14）、現
像ロール（14）に圧接され、現像ロール（14）上に帯電
トナーを薄層状に形成する層形成部材（７）および現像
ロール（14）にバイアス電圧を印加し、帯電トナーを感
光体（８）上の静電潜像に現像するための直流重畳交流
電源（９）から概略構成される現像装置であつて、浮遊
トナー（2a）または遊離するトナー（2b）を捕獲する保
持部材（16）に固定されたマグネツト（15）を現像装置
の下方部のハウジング（11）に設け、マグネツト（15）
に捕獲されたトナー（2c）が対向する感光体（８）に接
触することなく現像装置内に回収されるようにしたもの
である。As shown in the cross section of FIG. 1 of the developing device of the present invention, the developing device (10) of the present invention comprises a hopper (3) having one-component toner (2) and a magnet roll (4). ), A reinforcing material (12), a conductive adhesive (13) and a plastic sleeve (5) are pressed against a developing roll (14) and a developing roll (14), and charged toner is placed on the developing roll (14). A DC superimposing AC power supply (9) for applying a bias voltage to the layer forming member (7) and the developing roll (14) formed in a thin layer to develop the charged toner into an electrostatic latent image on the photoconductor (8). In the developing device, the magnet (15) fixed to a holding member (16) for capturing floating toner (2a) or free toner (2b) is provided in a housing (11) below the developing device. Installed in the magnet (15)
The toner (2c) captured by the toner is collected in the developing device without coming into contact with the opposing photoconductor (8).
ここで、現像ロール（14）はマグネツトロール（４）と
プラスチツクスリーブ（５）と補強材（12）で構成さ
れ、プラスチツクスリーブは肉厚1mm、外径φ30.5mm、
比抵抗106〜1010Ω・cm、比誘電率20である、カーボン
及びグラスフアイバー等を添加したフエノール樹脂であ
り、内側に肉厚0.5mm、外径φ27.5mmのAl管の補強材（1
2）が導電性接着剤（13）によつて接着されている。
又、マグネツトロール（４）と補強材（12）は電気的に
接続されており、マグネツトロール（４）の軸には直流
電圧50〜400Vに周波数2.4KHz、電圧2.4KVの高周波
交番電圧を重畳した現像バイアス電源（９）が印加して
いる。補強材（12）とスリーブ（５）は導電接着してい
る為、現像電極としてのスリーブ（５）へ確実に現像バ
イアスが印加される。Here, the developing roll (14) is composed of a magnet roll (4), a plastic sleeve (5) and a reinforcing material (12), the plastic sleeve having a wall thickness of 1 mm and an outer diameter of φ30.5 mm,
It is a phenol resin with a specific resistance of 10 6 -10 10 Ωcm and a relative permittivity of 20 with carbon and glass fiber added, with a thickness of 0.5 mm inside and an Al pipe reinforcement of 27.5 mm outside diameter ( 1
2) is adhered by a conductive adhesive (13).
Further, the magnet roll (4) and the reinforcing material (12) are electrically connected, and the shaft of the magnet roll (4) has a DC voltage of 50 to 400 V, a frequency of 2.4 KHz, and a high frequency alternating voltage of 2.4 KV. Is applied by the developing bias power source (9). Since the reinforcing material (12) and the sleeve (5) are electrically conductively bonded, a developing bias is surely applied to the sleeve (5) as a developing electrode.
又、現像ロール（14）と感光体（８）間は100μｍ〜500
μｍのすき間があり、非接触で現像を行つているが、補
強材を設けたことにより第３図にしめした装置に比べス
リーブ（５）の変形量は1/2〜1/3低下し、約30μｍであ
る為、これによる画質上のムラは発生しなくなつた。
又、感光体（８）と現像ロール（14）間に浮遊トナー
（2a）や遊離するトナー（2b）等の発生も改善されるも
のの尚十分でないため、マグネツト（15）を設けること
によりこのトナー（2a）および（2b）を捕獲する。Also, the distance between the developing roll (14) and the photoconductor (8) is 100 μm to 500 μm.
Although there is a gap of μm and development is performed in a non-contact manner, the amount of deformation of the sleeve (5) is reduced by 1/2 to 1/3 compared to the device shown in FIG. Since it is about 30 μm, the unevenness in the image quality due to this is eliminated.
Further, although the generation of floating toner (2a) or free toner (2b) is improved between the photoconductor (8) and the developing roll (14), it is still insufficient. Therefore, by providing the magnet (15), Capture (2a) and (2b).
ここで、マグネツト（15）の磁力は対向する現像ロール
（14）の磁力よりも低くし、マグネツト（15）と感光体
（８）の距離、マグネツト（15）の磁力及び長さ、厚
み、極性、現像ロール（14）への角度、距離を加えて保
持部材（16）をマグネツトに取り付け磁力の向きを規制
・調整することにより、捕獲トナー（2c）の穂立ちを現
像ロール（14）側へ向け、かつ、感光体（８）に接触さ
せないように回収トナー（2d）としてスリーブ（５）表
面に移転・吸着せしめてホツパー（３）内へ現像ロール
（14）の回転により回収する。ここで、マグネツト（1
5）の磁力を200G、極性をＮ、対向する非回転マグネツ
トロール（４）の磁極の極性をＳ、磁力を650G、マグネ
ツト（15）の厚さ（1mm）、現像ロール（14）への角度
θ＝72°、保持部材（16）の素材を鉄板とした。Here, the magnetic force of the magnet (15) is made lower than the magnetic force of the developing roller (14) facing each other, the distance between the magnet (15) and the photoconductor (8), the magnetic force and length of the magnet (15), thickness, polarity. By attaching the holding member (16) to the magnet by adjusting the angle and distance to the developing roll (14) and controlling and adjusting the direction of the magnetic force, the spikes of the captured toner (2c) are directed to the developing roll (14) side. The collected toner (2d) is transferred and adsorbed to the surface of the sleeve (5) so as not to come into contact with the photoconductor (8), and is collected in the hopper (3) by rotation of the developing roll (14). Where the magnet (1
The magnetic force of 5) is 200 G, the polarity is N, the polarity of the magnetic poles of the non-rotating magnet roll (4) facing each other is S, the magnetic force is 650 G, the thickness of the magnet (15) (1 mm), and the developing roll (14) The angle θ = 72 °, and the material of the holding member (16) was an iron plate.
また、マグネツト（15）と保持部材（16）の組合わせを
第２図の様に構成することもできる。これは、マグネツ
トの高さ方向の中間で磁極を反転したマグネツト（23）
および（24）を使用し、かつ第１図のθを90°とする保
持部材（22）に隣接して設けた。ここで、磁力線の向き
は現像ロール（14）側に規制され、捕獲トナー（2c）の
穂立ち方向は一定し、捕獲トナー（2c）は感光体（８）
に接触することなく回収トナー（2d）としてスリーブ
（５）表面上に移転・吸着され、ホツパー（３）内へ回
収される。Further, the combination of the magnet (15) and the holding member (16) can be configured as shown in FIG. This is a magnet (23) with the magnetic poles reversed in the middle of the height of the magnet.
And (24) are used, and they are provided adjacent to the holding member (22) whose θ in FIG. 1 is 90 °. Here, the direction of the lines of magnetic force is regulated to the developing roll (14) side, the rising direction of the capture toner (2c) is constant, and the capture toner (2c) is the photoconductor (8).
The recovered toner (2d) is transferred / adsorbed on the surface of the sleeve (5) without being in contact with the toner and is collected in the hopper (3).
また前記実施例中の補強材（12）は、必ずしも必要とし
ないが、現像ロールにたわみが生じるような場合に有効
なものである。Further, the reinforcing material (12) in the above-mentioned embodiment is not always necessary, but it is effective when the developing roll is bent.
第１図のマグネツト（15）および保持部材（16）からな
るトナー捕獲手段および第２図に示したトナー捕獲手段
において、感光体（８）に対向する保持部材表面にトナ
ーが付着しないようなその保持部材の材料の種類・形状
等は前述に限定されない。また、この保持部材は必須で
はなく、マグネツトの形状および極極の位置等を適宜選
択して浮遊トナー（2a）および遊離するトナー（2b）を
捕獲してこのトナーを感光体（８）に接触することなく
現像ロールのみへ移転させるための捕獲トナー穂立ち形
成のための磁極を有したマグネツトのみをハウジング
（11）に直接設けてもよい。In the toner catching means comprising the magnet (15) and the holding member (16) in FIG. 1 and the toner catching means shown in FIG. 2, the toner is prevented from adhering to the surface of the holding member facing the photoconductor (8). The type and shape of the material of the holding member is not limited to the above. Further, this holding member is not essential, the floating toner (2a) and the released toner (2b) are captured by appropriately selecting the shape of the magnet and the positions of the poles, and the toner is brought into contact with the photoconductor (8). It is also possible to directly provide only the magnet having the magnetic poles for forming the trapped toner spikes for transferring only to the developing roll without being provided directly to the housing (11).
本考案の現像装置は、簡単な構成の浮遊トナー等の捕獲
手段および捕獲トナーの回収手段を用いているので、低
コストで複写機内のトナーの汚れおよび複写紙汚れ等を
防止できるばかりでなく、トナーを効率よく回収再使用
することができるため、トナーの節約においても効果が
ある。Since the developing device of the present invention uses the trapping means for the floating toner and the collecting means for the trapped toner having a simple structure, not only the toner stains and copy paper stains in the copying machine can be prevented at low cost, but also Since the toner can be efficiently collected and reused, it is effective in saving the toner.
第１図は本考案の現像装置の断面図、第２図は、第１図
のトナー捕獲手段の他の例を示す断面図、および第３図
は従来の現像装置の断面図である。 １……従来の現像装置、２……一成分磁性トナー 2a……浮遊トナー、2b……遊離するトナー 2c……捕獲トナー、2d……回収トナー ３……ホツパー、４……マグネツトロール ５……プラスチツクスリーブ、６……現像ロール ７……層形成部材、８……感光体 ９……直流重畳交流電源、10……本考案の現像装置 11……ハウジング、12……補強材 13……導電性接着剤、14……現像ロール 15……マグネツト、16……保持部材 22……保持部材 23,24……マグネツトFIG. 1 is a sectional view of a developing device of the present invention, FIG. 2 is a sectional view showing another example of the toner capturing means of FIG. 1, and FIG. 3 is a sectional view of a conventional developing device. 1 ... Conventional developing device, 2 ... One-component magnetic toner 2a ... Floating toner, 2b ... Free toner 2c ... Capture toner, 2d ... Collected toner 3 ... Hopper, 4 ... Magnetoroll 5 …… Plastic sleeve, 6 …… Developing roll 7 …… Layer forming member, 8 …… Photosensitive member 9 …… DC superimposed AC power supply, 10 …… Developing device of the present invention 11 …… Housing, 12 …… Reinforcing material 13 …… … Conductive adhesive, 14 …… Developing roll 15 …… Magnet, 16 …… Holding member 22 …… Holding member 23,24 …… Magnet
───────────────────────────────────────────────────── フロントページの続き (72)考案者 菅野 誠 神奈川県海老名市本郷2274番地 富士ゼロ ックス株式会社海老名事業所内 (56)参考文献 特開 昭50−36133（ＪＰ，Ａ) 特開 昭58−205172（ＪＰ，Ａ) 特開 昭60−95574（ＪＰ，Ａ) 特開 昭55−142372（ＪＰ，Ａ) 実開 昭63−130770（ＪＰ，Ｕ) 実開 昭62−129565（ＪＰ，Ｕ) 実開 昭58−133157（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of front page (72) Makoto Kanno 2274 Hongo, Ebina City, Kanagawa Fuji Xerox Co., Ltd. Ebina Works (56) References JP-A-50-36133 (JP, A) JP-A-58- 205172 (JP, A) JP 60-95574 (JP, A) JP 55-142372 (JP, A) Actual opening 63-130770 (JP, U) Actual opening 62-129565 (JP, U) 58-133157 (JP, U)
Claims (1)
る磁石を現像装置の下方部に設け、磁石の磁力を対向す
る現像ロールの磁力よりも低くかつ現像ロールに向くよ
うにし、前記磁石に捕獲された現像剤が対向する感光体
に接触する事なく、前記現像ロールと前記磁石間で現像
剤の穂立ちを形成させ、現像装置内に回収されるように
した事を特徴とする現像装置。1. A magnet for trapping a floating or free one-component developer is provided in a lower portion of a developing device so that a magnetic force of the magnet is lower than a magnetic force of an opposing developing roll and is directed to the developing roll. A developing device, characterized in that the captured developer does not come into contact with the opposing photoconductor, and a spike of the developer is formed between the developing roll and the magnet and is collected in the developing device. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988135006U JPH0723810Y2 (en) | 1988-10-18 | 1988-10-18 | Development device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988135006U JPH0723810Y2 (en) | 1988-10-18 | 1988-10-18 | Development device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0258252U JPH0258252U (en) | 1990-04-26 |
| JPH0723810Y2 true JPH0723810Y2 (en) | 1995-05-31 |
Family
ID=31394261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988135006U Expired - Lifetime JPH0723810Y2 (en) | 1988-10-18 | 1988-10-18 | Development device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0723810Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006126623A (en) * | 2004-10-29 | 2006-05-18 | Kyocera Mita Corp | Development device and image forming apparatus equipped with same |
| JP4761185B2 (en) * | 2005-03-04 | 2011-08-31 | 富士ゼロックス株式会社 | Developing cartridge and image forming apparatus |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5547743B2 (en) * | 1973-07-24 | 1980-12-02 | ||
| JPS55142372A (en) * | 1979-04-23 | 1980-11-06 | Canon Inc | Developer scatter preventive device |
| JPS58133157U (en) * | 1982-03-02 | 1983-09-08 | 富士ゼロックス株式会社 | Copying machine developing device |
| JPS58205172A (en) * | 1982-05-24 | 1983-11-30 | Minolta Camera Co Ltd | Electrostatic latent image developing device |
| JPS59170868A (en) * | 1983-03-17 | 1984-09-27 | Matsushita Electric Ind Co Ltd | Developing device |
| JPS6095574A (en) * | 1983-10-31 | 1985-05-28 | Canon Inc | Image forming device |
| JPS62129565U (en) * | 1986-02-07 | 1987-08-15 | ||
| JPH0631481Y2 (en) * | 1987-02-18 | 1994-08-22 | 富士ゼロックス株式会社 | Development device |
-
1988
- 1988-10-18 JP JP1988135006U patent/JPH0723810Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0258252U (en) | 1990-04-26 |
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