JP2685540B2 - Corona discharger cleaning device - Google Patents
Corona discharger cleaning deviceInfo
- Publication number
- JP2685540B2 JP2685540B2 JP25580588A JP25580588A JP2685540B2 JP 2685540 B2 JP2685540 B2 JP 2685540B2 JP 25580588 A JP25580588 A JP 25580588A JP 25580588 A JP25580588 A JP 25580588A JP 2685540 B2 JP2685540 B2 JP 2685540B2
- Authority
- JP
- Japan
- Prior art keywords
- feed screw
- slider
- corona wire
- cleaning device
- corona
- 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 - Fee Related
Links
Landscapes
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、複写機等の除・帯電装置として使用される
細線型コロナ放電器のコロナワイヤの清掃装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corona wire cleaning device for a fine wire type corona discharger used as a decharging / charging device for a copying machine or the like.
従来技術 電子写真複写機の静電プリンタ等の静電記録装置の感
光体の帯電、転写、除電等に使用される除・帯電装置と
しては、感光体の全幅に亘って延設された樋状のシール
ド部材の両端に設けられた誘電体製のエンドブロック間
にタングステン線等の細線を張設し、これに高圧を印加
することにより細線にコロナ放電を起させて感光体面を
除帯電させるコロナ放電器が広く使用されている。上記
の細線は一般にコロナワイヤと呼ばれている。2. Description of the Related Art As a charging / discharging device used for charging, transferring, and discharging a photoconductor of an electrostatic recording device such as an electrostatic printer of an electrophotographic copying machine, a gutter shape extending over the entire width of the photoconductor is used. A thin wire such as a tungsten wire is stretched between the end blocks made of a dielectric material provided on both ends of the shield member, and a corona discharge is generated in the thin wire by applying a high voltage to the corona to decharge the surface of the photoconductor. Dischargers are widely used. The above-mentioned thin wire is generally called a corona wire.
ところで、複写機等の記録装置内の雰囲気中には、ト
ナー、紙粉、塵埃等の異物が浮遊しており、経時的にそ
れらの異物がコロナワイヤに付着し、放電効率の低下や
放電ムラを生じ作像される画像の品質を低下させる。そ
こで良好な画質を維持するため、コロナ放電器のコロナ
ワイヤを定期的に清掃することが必要である。By the way, foreign matters such as toner, paper powder, and dust are floating in the atmosphere in a recording apparatus such as a copying machine, and these foreign matters adhere to the corona wire over time, resulting in a decrease in discharge efficiency and uneven discharge. And deteriorates the quality of the image formed. Therefore, in order to maintain good image quality, it is necessary to regularly clean the corona wire of the corona discharger.
コロナ放電器は、第３図に示す如く、樋状のシールド
ケース１の両端に設けられたエンドブロック2,3の間に
バネ４を介してコロナワイヤ５を張設して成り、このコ
ロナワイヤ５に高圧を印加してコロナ放電を起させる。
こののような構成のコロナ放電器のコロナワイヤ５の清
掃装置としては、コロナ放電器のシールドケース１の背
面に両端のエンドブロックの間の全長に亘ってスリット
1aを設け、その外側にコロナワイヤ５と概ね平行に送り
ねじ６を、その両端をエンドブロックに固定された支持
部材7,8により回転自在に軸支し、この送りねじ６に螺
合可能な雌ねじ部10を有し清掃部材11を先端に一体的に
保持するスライダ９を、雌ねじ部10を送りねじ６に螺合
させ、シールドケース１のスリット1aを貫通させて清掃
部材11をコロナワイヤに摺接させ、モータ12によりカッ
プリング13を介して送りねじ６を回転させスライダ９を
送りねじ６の端から端迄往復移動させてコロナワイヤを
清掃するようにした構成のものが知られている。As shown in FIG. 3, the corona discharger is constructed by extending a corona wire 5 via springs 4 between end blocks 2 and 3 provided at both ends of a gutter-shaped shield case 1. A high voltage is applied to 5 to cause corona discharge.
As a cleaning device for the corona wire 5 of the corona discharger having such a configuration, a slit is formed on the back surface of the shield case 1 of the corona discharger over the entire length between the end blocks at both ends.
1a is provided, a feed screw 6 is provided on the outer side of the feed screw 6 substantially parallel to the corona wire 5, and both ends of the feed screw 6 are rotatably supported by support members 7 and 8 fixed to end blocks. A slider 9 having a female screw portion 10 and integrally holding a cleaning member 11 at the tip is screwed into the female screw portion 10 with a feed screw 6, and the slit 1a of the shield case 1 is penetrated to make the cleaning member 11 a corona wire. There is known a structure in which the motor 9 rotates the feed screw 6 via the coupling 13 to reciprocate the slider 9 from one end of the feed screw 6 to the other to clean the corona wire. .
スライダ９は、送りねじの軸方向に相接して２つタン
デムに設け、清掃部材11をコロナワイヤ５を挟んで向合
うように取付け、両方の清掃部材11でコロナワイヤ５を
自然の緊張状態より夫々の圧接位置で若干押出すように
すれば清掃部材11はワイヤに強く摺接し清掃効果が向上
する。清掃装置の作動は図示しない制御回路により、所
定の作像回数毎にモータ12に通電し、スライダ９を一方
の端のホームポジションから他端迄移動させ、スライダ
９が他端に達して送りねじ支持部材に当接すればモータ
12の回転方向が自動的に切換えられるようにし、ホーム
ポジションに復帰すればモータ12が停止するようにする
のがよい。Two sliders 9 are provided in tandem so as to be in contact with each other in the axial direction of the feed screw, and the cleaning members 11 are attached so as to face each other with the corona wire 5 sandwiched therebetween. By slightly pushing out at the respective pressure contact positions, the cleaning member 11 is in strong sliding contact with the wire and the cleaning effect is improved. The cleaning device is operated by a control circuit (not shown) that energizes the motor 12 every predetermined number of times of image formation, moves the slider 9 from the home position at one end to the other end, and the slider 9 reaches the other end to feed the screw. If it contacts the support member, the motor
It is preferable that the rotation direction of 12 is automatically switched and that the motor 12 is stopped when returning to the home position.
ところで、従来はスライダ９の雌ねじ部10は、第４図
に示す如く、送りねじ６の雄ねじに全周にわたって螺合
しているので、コロナワイヤ５と同様、飛散トナーや紙
粉により経時的に汚染された送りねじ６が回転し、スラ
イダ９が送られると、送りねじ６のねじ山部及びねじ谷
部に付着した汚れはスライダ９の進行方向前面の雌ねじ
孔の周縁で削り取られ雌ねじ孔の周囲に符号14で示す如
く付着して押し進められ、一部はスライダ９の雌ねじ部
10と送りねじ６の間の隙間に入り込み、逃げ場がなくな
り、送りねじ６に固着する。送りねじに固着した汚れは
トナーを含んでいるため、機内温度の影響を受け、経時
的により強固に固着する。この現象が進展すると送りね
じ６は部分的に目詰りを起し、スライダ９の移動時の負
荷を増大させる。負荷が増大することにより、スライダ
９が移動の途中で停止し動かなくなった場合、ユーザー
がこれに気付かないまゝ、コピー動作を行なうと、スラ
イダが停止している部分でコロナワイヤは放電が妨げら
れ、帯電チャージャであれば、感光体が局部的に帯電さ
れず画像上に白ぬけが発生し、コピー品質を著しく低下
させる。By the way, conventionally, the female screw portion 10 of the slider 9 is screwed over the male screw of the feed screw 6 over the entire circumference as shown in FIG. When the contaminated feed screw 6 rotates and the slider 9 is fed, the dirt adhering to the thread crests and thread troughs of the feed screw 6 is scraped off at the peripheral edge of the female screw hole on the front surface of the slider 9 in the traveling direction. As shown by the reference numeral 14, it is attached to the periphery and pushed forward, and a part of the female thread portion of the slider 9
It enters the gap between 10 and the feed screw 6, and there is no escape area, and it is fixed to the feed screw 6. Since the dirt adhered to the feed screw contains toner, it is affected by the internal temperature of the machine and adheres more firmly with time. As this phenomenon progresses, the feed screw 6 partially becomes clogged, increasing the load when the slider 9 moves. If the slider 9 stops and does not move in the middle of the movement due to an increase in the load and the user does not notice this, the corona wire is prevented from being discharged at the portion where the slider is stopped when the copying operation is performed. However, in the case of the charging charger, the photoconductor is not locally charged, and white spots occur on the image, and copy quality is significantly deteriorated.
発明が解決しようとする課題 本発明は、上記構成のコロナ放電器の清掃装置の上述
の問題点を解消した、清掃装置のスライダがトナーや紙
粉などの汚れの影響を受けることなく、常時安定した清
掃動作を行なうことのできるコロナ放電機の清掃装置を
提供することを課題とする。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention solves the above-mentioned problems of the cleaning device for the corona discharger having the above-mentioned configuration, and the slider of the cleaning device is always stable without being affected by dirt such as toner or paper dust. An object of the present invention is to provide a cleaning device for a corona discharger that can perform the cleaning operation described above.
課題解決のための手段 本発明は、上記の課題を解決させるため、スライダ
（清掃部材保持部材）の雌ねじ部にねじ孔内面から半径
方向に外方に開く切欠きを設けたことを特徴とする。Means for Solving the Problems In order to solve the above problems, the present invention is characterized in that a female thread portion of a slider (cleaning member holding member) is provided with a notch that opens radially outward from an inner surface of a screw hole. .
さらに、本発明は上記の課題を解決するために、上記
送りねじと上記保持部材の雌ネジ部に侵入した汚れの逃
げ場を形成するために、上記送りねじがねじを２条有す
ることを特徴とする。Further, in order to solve the above problems, the present invention is characterized in that the feed screw has two threads in order to form an escape area for dirt that has entered the female screw portion of the feed screw and the holding member. To do.
作 用 スライダの雌ねじ部に上記の如く切欠きを設けたこと
により、送りねじの表面に付着した汚れは、スライダの
雌ねじ部の内面から外方に開く切欠きのねじ孔側のエッ
ジで削り取られ、切欠きに溜り、切欠きから外部に排出
される。つまり、コロナワイヤの清掃と同時に送りねじ
の清掃も行なわれる。したがって汚れが送りねじとスラ
イダの雌ねじの間に入って固着しスライダの移動を妨げ
ることは防止される。Since the notch is provided on the female thread of the slider as described above, dirt adhering to the surface of the feed screw is scraped off at the screw hole side edge of the notch that opens outward from the inner surface of the female thread of the slider. , It collects in the notch and is discharged to the outside from the notch. That is, the feed screw is cleaned at the same time as the corona wire is cleaned. Therefore, it is possible to prevent dirt from entering between the feed screw and the female screw of the slider and sticking to the same to hinder the movement of the slider.
実施例 第１図及び第２図は本発明を前述の構成のコロナ放電
器の清掃装置に適用した実施例のスライダの側面図及び
断面図であり、第３図及び第４図に示す部材と同一部材
には同一符号を付している。EXAMPLE FIG. 1 and FIG. 2 are a side view and a sectional view of a slider of an example in which the present invention is applied to a cleaning device for a corona discharger having the above-mentioned structure. The same members are designated by the same reference numerals.
スライダ９の雌ねじ部10には、清掃部材11の保持部と
反対側に雌ねじ孔内面から半径方向に外面に達する切欠
き10aが雌ねじ孔の全長に亘って設けられている。The female screw portion 10 of the slider 9 is provided with a notch 10a extending from the inner surface of the female screw hole to the outer surface in the radial direction on the side opposite to the holding portion of the cleaning member 11 over the entire length of the female screw hole.
上記の如く構成したことにより、送りねじ６の表面に
付着した汚れは、スライダ９の雌ねじ部10の内面から外
方に開く切欠き10aのねじ孔側のエッジで削り取られ、
切欠き10aに溜り、切欠き10aから外部に排出される。し
たがって、コロナワイヤ５の清掃と同時に送りねじ６の
清掃も行なわれる。このため、汚れが送りねじ６とスラ
イダ９の雌ねじ10の間に入って固着し、スライダ９の移
動を妨げるという問題の発生が防止される。With the above configuration, the dirt attached to the surface of the feed screw 6 is scraped off by the edge of the notch 10a opening outward from the inner surface of the female screw portion 10 of the slider 9 on the screw hole side,
It collects in the notch 10a and is discharged to the outside from the notch 10a. Therefore, the feed screw 6 is cleaned simultaneously with the cleaning of the corona wire 5. Therefore, it is possible to prevent the problem that dirt enters the space between the feed screw 6 and the female screw 10 of the slider 9 and is fixed to prevent the movement of the slider 9.
第５図は本発明の他の実施例を示す側面図であって、
本実施例ではスライダ９の雌ねじ部10に外部に開く切欠
き10aを設ける代りに、送りねじ６のねじをピッチP1、
リードl1の２条ねじとし、スライダ９の雌ねじをピッチ
２×P1、リードl1の１条ねじとして構成している。FIG. 5 is a side view showing another embodiment of the present invention,
In the present embodiment, instead of providing the notch 10a that opens to the outside in the female screw portion 10 of the slider 9, the screw of the feed screw 6 has a pitch P1,
And 2 start thread leads l 1, constitutes the female screw of the slider 9 pitches 2 × P1, as a threaded screw lead l 1.
この構成によれば、送りねじ６の１本のねじ溝にはス
ライダ９の雌ねじ10のねじ山が係合せず、スライダ９と
送りねじ６との間に侵入するトナー等の汚れの逃げ場と
なる。逃げ場となる方のねじ溝はスライダ９の外部に連
通しているので、ねじ溝に汚れが詰ることが防止され
る。したがって、前記の実施例と同様、異物によってス
ライダの移動負荷が増大し、その移動を妨げるという問
題が解消される。According to this configuration, one thread groove of the feed screw 6 does not engage with the thread of the female screw 10 of the slider 9, and serves as an escape area for dirt such as toner entering between the slider 9 and the feed screw 6. . Since the thread groove serving as the escape area communicates with the outside of the slider 9, clogging of the thread groove is prevented. Therefore, similar to the above-described embodiment, the problem that the foreign matter increases the moving load of the slider and hinders its movement is solved.
効 果 請求項１の構成によれば、コロナ放電装置のコロナワ
イヤを送りねじに螺合するスライダに取付けられた清掃
部材で摺擦して清掃する清掃装置において、スライダの
移動によって汚れを切欠きから外部に排出できるので、
送りねじに付着したトナー等の汚れによりスライダの移
動が妨げられることが防止できる。According to the configuration of claim 1, in the cleaning device in which the corona wire of the corona discharge device is rubbed and cleaned by the cleaning member attached to the slider that is screwed to the feed screw, the dirt is notched by the movement of the slider. Can be discharged from the outside,
It is possible to prevent the movement of the slider from being hindered by dirt such as toner attached to the feed screw.
請求項２の構成によれば、送りねじとスライダの雌ネ
ジ部に侵入した汚れの逃げ部を、２条有する送りねじ、
雌ネジ部を１条ねじに構成することで形成できるので、
送りねじに付着したトナー等の汚れをねじ溝から排出で
き、スライダの移動が妨げられることが防止できる。According to the configuration of claim 2, a feed screw having two escape portions for dirt that has entered the female screw portion of the feed screw and the slider,
Since it can be formed by configuring the female screw part as a single thread,
Dirt such as toner attached to the feed screw can be discharged from the screw groove, and the movement of the slider can be prevented from being hindered.
第１図は本発明の実施例の側面図、第２図は第１図中の
II−II線による断面図、第３図は本発明が適用される清
掃装置を備えたコロナ放電器の１例を示す側断面図、第
４図は従来の清掃装置のスライダの側面図、第５図は本
発明の課題を達成する他の手段を示す側面図である。 ５……コロナワイヤ、６……送りねじ、 ９……スライダ（保持部材）、 10……雌ねじ部、10a……切欠き、 11……清掃部材、 12……モータ（回転駆動手段）FIG. 1 is a side view of an embodiment of the present invention, and FIG. 2 is a side view of FIG.
A sectional view taken along line II-II, FIG. 3 is a side sectional view showing an example of a corona discharger provided with a cleaning device to which the present invention is applied, and FIG. 4 is a side view of a slider of a conventional cleaning device. FIG. 5 is a side view showing another means for achieving the object of the present invention. 5 ... Corona wire, 6 ... Feed screw, 9 ... Slider (holding member), 10 ... Female thread part, 10a ... Notch, 11 ... Cleaning member, 12 ... Motor (rotational drive means)
Claims (2)
ナワイヤと、該コロナワイヤに概ね平行に延長され両端
を回転自在に支持された送りねじと、該送りねじに螺合
する雌ねじ部と上記コロナワイヤを摺擦する清掃部材を
一体的に保持する保持部材と、上記送りねじを回転駆動
する手段とを有するコロナ放電器の清掃装置において、 上記保持部材の雌ネジ部にねじ孔内面から半径方向に外
方に開く切欠きを設けたことを特徴とする清掃装置。1. A corona wire stretched in the longitudinal direction of a shield member, a feed screw extending substantially parallel to the corona wire and rotatably supported at both ends, and a female screw portion screwed to the feed screw. In a corona discharger cleaning device having a holding member that integrally holds a cleaning member that rubs the corona wire, and a unit that rotationally drives the feed screw, a female screw portion of the holding member is provided with an internal surface of a screw hole. A cleaning device having a notch that opens outward in the radial direction.
ナワイヤと、該コロナワイヤに概ね平行に延長され両端
を回転自在に支持された送りねじと、該送りねじに螺合
する１条ねじの雌ねじ部と上記コロナワイヤを摺擦する
清掃部材を一体的に保持する保持部材と、上記送りねじ
を回転駆動する手段とを有するコロナ放電器の清掃装置
において、 上記送りねじと上記保持部材の雌ネジ部に侵入した汚れ
の逃げ場を形成するために、上記送りねじがねじを２条
有することを特徴とする清掃装置。2. A corona wire stretched in the longitudinal direction of a shield member, a feed screw extending substantially parallel to the corona wire and having both ends rotatably supported, and a single-thread screw screwed to the feed screw. In a cleaning device for a corona discharger, which has a holding member integrally holding a cleaning member for rubbing the corona wire and a female screw portion of the corona wire, and a means for rotationally driving the feed screw, the feed screw and the holding member A cleaning device characterized in that the feed screw has two threads in order to form an escape area for dirt that has entered the female screw portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25580588A JP2685540B2 (en) | 1988-10-13 | 1988-10-13 | Corona discharger cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25580588A JP2685540B2 (en) | 1988-10-13 | 1988-10-13 | Corona discharger cleaning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02103572A JPH02103572A (en) | 1990-04-16 |
| JP2685540B2 true JP2685540B2 (en) | 1997-12-03 |
Family
ID=17283877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25580588A Expired - Fee Related JP2685540B2 (en) | 1988-10-13 | 1988-10-13 | Corona discharger cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2685540B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2548122Y2 (en) * | 1991-02-01 | 1997-09-17 | 富士ゼロックス株式会社 | Corotron cleaning equipment |
-
1988
- 1988-10-13 JP JP25580588A patent/JP2685540B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02103572A (en) | 1990-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1186964B1 (en) | Image carrying belt with guide member | |
| US5970282A (en) | Method of cleaning a surface in an image forming apparatus by feeding toner to the surface | |
| EP0777156B1 (en) | Electrophotographic copier | |
| JP2001109351A (en) | Image forming device | |
| US6721515B2 (en) | Electrostatic transfer type image forming apparatus with control of start timing of transfer output | |
| JP2685540B2 (en) | Corona discharger cleaning device | |
| EP0025678B1 (en) | Cleaning device for a transferring system of a wet-type copying machine | |
| US20180220024A1 (en) | Cleaning device and image forming apparatus | |
| US20010026695A1 (en) | Method and apparatus for image forming capable of preventing a contamination of a brush-roller charger | |
| JPH0561396A (en) | Image forming device | |
| US5845186A (en) | Wet image forming apparatus including an intermediate transfer body having projections | |
| US6321049B1 (en) | Method and apparatus for image forming capable of effectively cleaning a transfer mechanism | |
| JPH0869232A (en) | Cleaning device for latent image carrier | |
| JPH0750779Y2 (en) | Cleaning device | |
| JP2867567B2 (en) | Fur brush cleaner | |
| JP4470579B2 (en) | Intermediate transfer apparatus and image forming apparatus | |
| US5305067A (en) | Photosensitive drum surface cleaning device for electrocopying machine | |
| JP4522172B2 (en) | Corona discharge device and image forming apparatus having the same | |
| JP5169514B2 (en) | Image forming apparatus | |
| JP5024194B2 (en) | Image forming apparatus | |
| JP2003263041A (en) | Discharge device and image forming apparatus | |
| JPH11143323A (en) | Cleaning device | |
| JPH01124877A (en) | Conductive brush for electrostatic charging device of electrophotographic recorder | |
| JPH02205869A (en) | Discharging wire cleaner | |
| JPS6286375A (en) | Automatic cleaning device for electrostatic charger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080815 Year of fee payment: 11 |
|
| LAPS | Cancellation because of no payment of annual fees |