JPH09267945A - Image formation device - Google Patents
Image formation deviceInfo
- Publication number
- JPH09267945A JPH09267945A JP7703596A JP7703596A JPH09267945A JP H09267945 A JPH09267945 A JP H09267945A JP 7703596 A JP7703596 A JP 7703596A JP 7703596 A JP7703596 A JP 7703596A JP H09267945 A JPH09267945 A JP H09267945A
- Authority
- JP
- Japan
- Prior art keywords
- suction
- conveyor belt
- recording paper
- paper
- roller
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、記録用紙を搬送ベ
ルトに吸着させて搬送し、その搬送途中で記録用紙に画
像を転写するようにした画像形成装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus in which a recording sheet is adsorbed on a conveyor belt and conveyed, and an image is transferred onto the recording sheet during the conveyance.
【０００２】[0002]
【従来の技術】従来の画像形成装置を図７に基づいて説
明する。この画像形成装置はカラー画像を形成できるも
ので、本体ケース１内に４個の印刷ステーション２1 ，
２2 ，２3 ，２4 と定着装置３とが設けられており、こ
れらの印刷ステーション２1 〜２4 に対向した搬送ベル
ト４が駆動ローラ５と従動ローラ６との間に掛け渡され
ている。各印刷ステーション２1 〜２4 は使用するトナ
ーの色が異なり、その構造は同一で、それぞれ、感光ド
ラム７、帯電装置８、露光装置９、現像装置１０、転写
ローラ１１、クリーニング装置１２等を備えている。2. Description of the Related Art A conventional image forming apparatus will be described with reference to FIG. This image forming apparatus is capable of forming a color image and has four printing stations 2 1 ,
2 2 , 2 3 , 2 4 and a fixing device 3 are provided, and a conveyor belt 4 facing these printing stations 2 1 to 2 4 is stretched between a driving roller 5 and a driven roller 6. There is. Each printing station 21 to 24 are different color toner used, the structure is the same, respectively, the photosensitive drum 7, a charging device 8, an exposure device 9, a developing device 10, transfer roller 11, a cleaning device 12, etc. I have it.
【０００３】前記搬送ベルト３の下方には記録用紙１３
を収納した給紙カセット１４ａ，１４ｂが配置され、前
記搬送ベルト４の周囲には、この搬送ベルト４で搬送す
る記録用紙１３を帯電させることにより記録用紙１３を
搬送ベルト４に吸着させる吸着部材１５、搬送ベルト４
を除電するベルト除電器１６、搬送ベルト４に付着した
紙粉やトナーなどを除去するベルトクリーナ１７が対向
配置されている。A recording sheet 13 is provided below the conveyor belt 3.
Paper feed cassettes 14a and 14b storing therein are arranged, and a suction member 15 that attracts the recording paper 13 to the transport belt 4 by charging the recording paper 13 transported by the transport belt 4 around the transport belt 4. , Conveyor belt 4
A belt charge eliminator 16 that removes electricity and a belt cleaner 17 that removes paper dust, toner, and the like adhering to the conveyor belt 4 are opposed to each other.
【０００４】このような構成において、この画像形成装
置でカラー画像の印刷を行う場合について説明する。各
印刷ステーション２1 〜２4 では、クリーニング装置１
２で感光ドラム７の表面から残留トナーが除去され、帯
電装置８で感光ドラム７の表面が一様に帯電され、この
感光ドラム７の表面に露光装置９の光走査で静電潜像が
形成され、この静電潜像が現像装置１０から供給される
トナーで現像されてトナー像が形成される。A case where a color image is printed by the image forming apparatus having the above structure will be described. Each printing station 21 to 24, the cleaning device 1
The residual toner is removed from the surface of the photosensitive drum 7 by 2 and the surface of the photosensitive drum 7 is uniformly charged by the charging device 8, and an electrostatic latent image is formed on the surface of the photosensitive drum 7 by optical scanning of the exposure device 9. The electrostatic latent image is developed with the toner supplied from the developing device 10 to form a toner image.
【０００５】このような印刷ステーション２1 〜２4 の
動作に同期して記録用紙１３が供給され、この記録用紙
１３は、吸着部材１５への電圧の印加により帯電され、
搬送ベルト４に吸着される。記録用紙１３は搬送ベルト
４に静電吸着された状態で搬送され、各印刷ステーショ
ン２1 〜２4 における感光ドラム７と転写ローラ１１と
の間を通過するときに、各感光ドラム７上のトナー像が
記録用紙１３に転写される。[0005] Such printing stations 2 1 in synchronism with the 21 to 24 of the operation recording paper 13 is fed, the recording sheet 13 is charged by applying a voltage to the adsorption member 15,
It is attracted to the conveyor belt 4. When the recording paper 13 passing between the conveyed while being electrostatically attracted to the conveyor belt 4, and the photosensitive drum 7 at each printing station 21 to 24 and the transfer roller 11, the toner on the photosensitive drum 7 The image is transferred to the recording sheet 13.
【０００６】各印刷ステーション２1 〜２4 を通過する
ときにトナー像が転写された記録用紙１３は、定着装置
３へ送り込まれてトナー像を定着された後に本体ケース
１の外部へ排出される。The recording paper 13 to which the toner image is transferred when passing through the printing stations 2 1 to 2 4 is sent to the fixing device 3 to fix the toner image, and then discharged to the outside of the main body case 1. .
【０００７】[0007]
【発明が解決しようとする課題】この画像形成装置で
は、記録用紙１３を搬送ベルト４に静電吸着させるため
に吸着部材１５へ電圧を印加するが、この電圧の印加に
より吸着部材１５の表面も帯電状態となり、長時間にわ
たって連続運転すると吸着部材１５の表面に記録用紙１
３の紙粉が徐々に付着する。紙粉が付着すると吸着部材
１５の表面の電気抵抗が徐々に大きくなり、記録用紙１
３の吸着性能が低くなる。In this image forming apparatus, a voltage is applied to the attraction member 15 in order to electrostatically attract the recording paper 13 to the conveyor belt 4, and the surface of the attraction member 15 is also applied by the application of this voltage. If the recording sheet 1 is charged on the surface of the adsorption member 15 when continuously operated for a long time.
The paper dust of 3 gradually adheres. When the paper dust adheres, the electric resistance of the surface of the adsorption member 15 gradually increases, and the recording paper 1
The adsorption performance of 3 becomes low.
【０００８】記録用紙１３の吸着性能が低くなると、搬
送ベルト４に吸着して搬送されている記録用紙１３がズ
レ易くなり、用紙ジャム、記録用紙１３の搬送不良、転
写時の画像ズレ等が発生する。When the suction performance of the recording paper 13 is lowered, the recording paper 13 sucked and conveyed by the conveyor belt 4 is likely to be displaced, and a paper jam, a defective conveyance of the recording paper 13 and an image deviation during transfer occur. To do.
【０００９】そこで、請求項１記載の発明は、吸着部材
の表面に付着した紙粉を除去することにより、記録用紙
を良好に帯電させることができ、記録用紙の搬送ベルト
への吸着性能を高くできる画像形成装置を提供するもの
である。Therefore, according to the first aspect of the invention, by removing the paper dust adhering to the surface of the adsorbing member, the recording paper can be satisfactorily charged, and the performance of adsorbing the recording paper on the conveyor belt is improved. An image forming apparatus that can be used is provided.
【００１０】また、請求項２記載の発明は、吸着部材の
表面に付着した紙粉の除去性能をさらに高くでき、記録
用紙の搬送ベルトへの吸着性能をさらに高くできる画像
形成装置を提供するものである。Further, the invention according to claim 2 provides an image forming apparatus capable of further improving the performance of removing the paper dust adhering to the surface of the suction member and further enhancing the performance of adsorbing the recording paper onto the conveyor belt. Is.
【００１１】請求項３記載の発明は、吸着チャージャの
表面への紙粉の付着により記録用紙の吸着性能が低くな
ることを防止できる画像形成装置を提供するものであ
る。The third aspect of the present invention provides an image forming apparatus capable of preventing the suction performance of a recording sheet from being deteriorated due to the adhesion of paper powder on the surface of the suction charger.
【００１２】[0012]
【課題を解決するための手段】請求項１記載の発明は、
少なくとも一つの印刷ステーションに対向させて配置し
た搬送ベルトと、電圧の印加により前記搬送ベルトとこ
の搬送ベルトで搬送する記録用紙とを帯電させる吸着部
材とを有し、前記搬送ベルトに静電吸着させた前記記録
用紙に対して前記印刷ステーションで形成した画像を転
写するようにした画像形成装置において、前記吸着部材
に付着した紙粉を除去するクリーニング手段を設けた。
従って、吸着部材の表面に付着した紙粉を除去すること
により、記録用紙を良好に帯電させることができ、記録
用紙の搬送ベルトへの吸着性能を高くできる。According to the first aspect of the present invention,
At least one printing station has a conveyor belt arranged to face it, and a suction member for charging the conveyor belt and the recording paper conveyed by the conveyor belt by applying a voltage, and electrostatically adsorbed to the conveyor belt. In the image forming apparatus configured to transfer the image formed in the printing station onto the recording sheet, a cleaning unit for removing the paper dust attached to the suction member is provided.
Therefore, by removing the paper dust adhering to the surface of the suction member, the recording paper can be favorably charged and the performance of adsorbing the recording paper onto the transport belt can be improved.
【００１３】請求項２記載の発明は、少なくとも一つの
印刷ステーションに対向させて配置した搬送ベルトと、
電圧の印加により前記搬送ベルトとこの搬送ベルトで搬
送する記録用紙とを帯電させる吸着部材とを有し、前記
搬送ベルトに静電吸着させた前記記録用紙に対して前記
印刷ステーションで形成した画像を転写するようにした
画像形成装置において、前記吸着部材とは逆極性の電圧
を印加してこの吸着部材の外周部に接触する中間クリー
ニング部材と、この中間クリーニング部材に付着した紙
粉を除去するクリーニング手段とを設けた。従って、吸
着部材の表面に付着した紙粉の除去性能をさらに高くで
き、記録用紙の搬送ベルトへの吸着性能をさらに高くで
きる。According to a second aspect of the present invention, there is provided a conveyor belt which faces at least one printing station,
An image formed by the printing station is formed on the recording sheet electrostatically attracted to the transport belt, which has an attraction member that charges the transport belt and a recording sheet transported by the transport belt by applying a voltage. In an image forming apparatus configured to perform transfer, an intermediate cleaning member that applies a voltage having a polarity opposite to that of the attraction member to contact the outer peripheral portion of the attraction member, and a cleaning device that removes paper dust attached to the intermediate cleaning member And means. Therefore, the performance of removing the paper dust adhering to the surface of the suction member can be further enhanced, and the performance of attracting the recording paper to the transport belt can be further enhanced.
【００１４】請求項３記載の発明は、請求項２記載の発
明において、吸着部材として吸着チャージャを設けた。
従って、吸着チャージャの表面への紙粉の付着により記
録用紙の吸着性能が低くなることを防止できる。According to a third aspect of the present invention, in the second aspect of the present invention, a suction charger is provided as a suction member.
Therefore, it is possible to prevent the suction performance of the recording paper from being deteriorated due to the adhesion of the paper powder to the surface of the suction charger.
【００１５】[0015]
【発明の実施の形態】本発明の第一の実施の形態を図１
に基づいて説明する。図示しない印刷ステーションに向
けて記録用紙１８を搬送するための搬送ベルト１９を配
置し、この搬送ベルト１９を図示しない駆動ローラと従
動ローラ２０との間に掛け渡して矢印ａ方向へ回転する
ように設けている。前記搬送ベルト１９の外周面におけ
る前記従動ローラ２０に近接した位置には、この搬送ベ
ルト１９の表面とこの搬送ベルト１９で搬送する記録用
紙１８とを帯電させる吸着部材である吸着ローラ２１を
配置する。吸着ローラ２１は金属や抵抗値が約１０6 Ω
の導電性ゴムで形成し、例えば、−１０００Ｖの電圧を
バイアス電源Ｖ1 から印加することにより搬送ベルト１
９の表面と記録用紙１８とを帯電させる。また、吸着ロ
ーラ２１には回転駆動機構を連結し、約２０ｍｍ／ｓの
周速で矢印ｂ方向に回転駆動させる。FIG. 1 shows a first embodiment of the present invention.
It will be described based on. A conveyor belt 19 for conveying the recording paper 18 toward a printing station (not shown) is arranged, and the conveyor belt 19 is hung between a driving roller (not shown) and a driven roller 20 so as to rotate in the direction of arrow a. It is provided. A suction roller 21 which is a suction member for charging the surface of the conveyor belt 19 and the recording paper 18 conveyed by the conveyor belt 19 is arranged at a position close to the driven roller 20 on the outer peripheral surface of the conveyor belt 19. . The suction roller 21 has a metal or resistance value of about 10 6 Ω.
And forming a conductive rubber, for example, the conveyor belt 1 by applying a voltage of -1000V from a bias power source V 1
The surface of 9 and the recording paper 18 are charged. Further, a rotation driving mechanism is connected to the suction roller 21 and is driven to rotate in the direction of arrow b at a peripheral speed of about 20 mm / s.
【００１６】前記吸着ローラ２１の外周部には、この吸
着ローラ２１の外周面に付着した紙粉２２を除去するク
リーニング手段２３を設ける。このクリーニング手段２
３は、先端部を吸着ローラ２１の外周面に接触させてこ
の吸着ローラ２１の外周面に付着している紙粉２２を掻
き落とすクリーニング部材２４と、このクリーニング部
材２４で掻き落とした紙粉２２を回収する紙粉ボックス
２５とにより形成する。クリーニング部材２４として
は、ポリエステル系のマイラフィルムやウレタン系のク
リーニングブレードを用い、吸着ローラ２１の外周面の
接線に対して２０〜３０゜の角度をもって接触させ、紙
粉ボックス２５に固定する。A cleaning means 23 for removing the paper dust 22 adhering to the outer peripheral surface of the suction roller 21 is provided on the outer peripheral portion of the suction roller 21. This cleaning means 2
Reference numeral 3 denotes a cleaning member 24 that scrapes off the paper dust 22 adhering to the outer peripheral surface of the suction roller 21 by bringing its tip end into contact with the outer peripheral surface of the suction roller 21, and the paper dust 22 scraped off by the cleaning member 24. And a paper powder box 25 for collecting the paper. As the cleaning member 24, a polyester-based mylar film or a urethane-based cleaning blade is used, and is brought into contact with the tangent line of the outer peripheral surface of the suction roller 21 at an angle of 20 to 30 ° and fixed to the paper dust box 25.
【００１７】このような構成において、吸着ローラ２１
に電圧を印加することによりこの吸着ローラ２１と接触
する記録用紙１８を帯電させ、記録用紙１８を搬送ベル
ト１９に静電吸着させる。In such a structure, the suction roller 21
By applying a voltage to the recording sheet 18, the recording sheet 18 that comes into contact with the suction roller 21 is charged, and the recording sheet 18 is electrostatically attracted to the conveyor belt 19.
【００１８】この電圧印加時において、吸着ローラ２１
の表面も帯電状態となって記録用紙１８の紙粉２２が付
着する。吸着ローラ２１に付着した紙粉２２は、吸着ロ
ーラ２１の回転に伴ってクリーニング部材２４と接触す
ることにより掻き落とされ、掻き落とされた紙粉２２は
紙粉ボックス２５に回収される。At the time of applying this voltage, the suction roller 21
The surface of the sheet also becomes charged and the paper dust 22 of the recording sheet 18 adheres. The paper dust 22 attached to the suction roller 21 is scraped off by coming into contact with the cleaning member 24 as the suction roller 21 rotates, and the scraped paper dust 22 is collected in the paper dust box 25.
【００１９】従って、吸着ローラ２１の外周面に付着し
た紙粉２２が徐々に増えて吸着ローラ２１の表面の電気
抵抗が大きくなることを防止できる。このため、吸着ロ
ーラ２１の表面の電気抵抗が大きくなることに伴う、記
録用紙１８を帯電させる吸着性能の低下を防止できる。Therefore, it is possible to prevent the paper dust 22 adhering to the outer peripheral surface of the suction roller 21 from gradually increasing and increasing the electric resistance of the surface of the suction roller 21. For this reason, it is possible to prevent the deterioration of the suction performance for charging the recording paper 18 due to the increase in the electric resistance of the surface of the suction roller 21.
【００２０】このため、画像形成を長時間にわたって連
続して行った場合でも、記録用紙１８を良好に帯電させ
ることができ、搬送ベルト１９への記録用紙１８の静電
吸着を良好に行える。これにより、搬送ベルト１９への
記録用紙１８の静電吸着状態が弱いために生ずる、記録
用紙１３の用紙ジャム、記録用紙１８の搬送不良、転写
時の画像ズレ等の発生を防止できる。Therefore, even when the image formation is continuously carried out for a long time, the recording paper 18 can be favorably charged, and the electrostatic attraction of the recording paper 18 to the conveyor belt 19 can be favorably carried out. As a result, it is possible to prevent the occurrence of a paper jam of the recording paper 13, a poor conveyance of the recording paper 18, an image shift at the time of transfer, etc., which is caused by the weak electrostatic attraction of the recording paper 18 to the conveyor belt 19.
【００２１】つぎに、本発明の第二の実施の形態を図２
に基づいて説明する。前述した第一の実施の形態と同一
の部分には同一の符号を付けて、異なる点について説明
する（以下、同様）。本実施の形態は、吸着部材とし
て、吸着ローラ２１に代えて吸着ブラシ２６を設けたも
のである。この吸着ブラシ２６も抵抗値が約１０6 Ωの
導電性部材で形成し、その外周部先端が搬送ベルト１９
で搬送する記録用紙１８に接触するように配置してい
る。クリーニング手段２３は、クリーニング部材２４の
先端部を吸着ブラシ２６の先端部に接触させるように配
置している。Next, a second embodiment of the present invention will be described with reference to FIG.
It will be described based on. The same parts as those in the first embodiment described above are designated by the same reference numerals, and different points will be described (the same applies hereinafter). In this embodiment, a suction brush 26 is provided as a suction member instead of the suction roller 21. The suction brush 26 is also formed of a conductive member having a resistance value of about 10 6 Ω, and the tip of the outer peripheral portion thereof is the conveyor belt 19.
It is arranged so as to come into contact with the recording paper 18 conveyed by. The cleaning unit 23 is arranged so that the tip of the cleaning member 24 contacts the tip of the suction brush 26.
【００２２】このような構成において、本実施の形態に
おいても、第一の実施の形態と同じように、吸着ブラシ
２６に電圧を印加することによりこの吸着ブラシ２６と
接触する記録用紙１８を帯電させ、記録用紙１８を搬送
ベルト１９に静電吸着させる。With such a configuration, also in the present embodiment, as in the first embodiment, by applying a voltage to the suction brush 26, the recording paper 18 contacting the suction brush 26 is charged. The recording paper 18 is electrostatically attracted to the conveyor belt 19.
【００２３】この電圧印加時において、吸着ブラシ２６
には記録用紙１８の紙粉２２が付着する。この紙粉２２
は、吸着ブラシ２６の回転に伴ってクリーニング部材２
４と接触することにより掻き落とされ、紙粉ボックス２
５に回収される。At the time of applying this voltage, the suction brush 26
The paper dust 22 of the recording paper 18 adheres to the paper. This paper dust 22
Is the cleaning member 2 as the suction brush 26 rotates.
The paper dust box 2 is scraped off by coming into contact with the paper powder box 2
Recovered in 5.
【００２４】従って、吸着ブラシ２６の表面に付着した
紙粉２２が徐々に増えて吸着ブラシ２６の表面の電気抵
抗が大きくなることを防止できる。このため、吸着ブラ
シ２６の表面の電気抵抗が大きくなることに伴う、記録
用紙１８を帯電させる吸着性能の低下を防止できる。Therefore, it is possible to prevent the paper dust 22 adhering to the surface of the suction brush 26 from gradually increasing and increasing the electric resistance of the surface of the suction brush 26. Therefore, it is possible to prevent deterioration of the suction performance for charging the recording paper 18 due to the increase in the electric resistance of the surface of the suction brush 26.
【００２５】このため、画像形成を長時間にわたって連
続して行った場合でも、搬送ベルト１９や記録用紙１８
を良好に帯電させることができ、搬送ベルト１９への記
録用紙１８の静電吸着を良好に行える。これにより、搬
送ベルト１９への記録用紙１８の静電吸着状態が弱いた
めに生ずる、記録用紙１３の用紙ジャム、記録用紙１８
の搬送不良、転写時の画像ズレ等の発生を防止できる。Therefore, even when the image formation is continuously performed for a long time, the conveyor belt 19 and the recording paper 18 are formed.
Can be favorably charged, and the electrostatic attraction of the recording paper 18 to the transport belt 19 can be favorably performed. As a result, the jam of the recording sheet 13 and the recording sheet 18 caused by the weak electrostatic attraction of the recording sheet 18 to the transport belt 19 occur.
It is possible to prevent the conveyance failure of the sheet and the occurrence of the image shift at the time of transfer.
【００２６】さらに、吸着ブラシ２６は吸着ローラ２１
に比べて搬送ベルト１９や記録用紙１８との接触面積が
大きいため、記録用紙１８に対する電圧印加の性能が高
くなり、また、紙粉２２を吸着して除去する性能も良く
なる。Further, the suction brush 26 is the suction roller 21.
Since the contact area with the conveyor belt 19 and the recording paper 18 is larger than that of the above, the performance of voltage application to the recording paper 18 is improved, and the performance of adsorbing and removing the paper dust 22 is also improved.
【００２７】つぎに、本発明の第三の実施の形態を図３
に基づいて説明する。本実施の形態は、第一の実施の形
態で説明した吸着ローラ２１の外周面に中間クリーニン
グ部材である導電性ローラ２７を接触させ、この導電性
ローラ２７を回転駆動機構により約２０ｍｍ／ｓの周速
で矢印ｃ方向に回転駆動させる。前記導電性ローラ２７
の外周部には、この導電性ローラ２７の外周面に付着し
た紙粉２２を除去するクリーニング手段２３を設ける。
前記導電性ローラ２７は、抵抗値が１０6 Ω以下の導電
性部材で形成し、前記吸着ローラ２１とは逆極性の電圧
を印加する。Next, a third embodiment of the present invention will be described with reference to FIG.
It will be described based on. In the present embodiment, the conductive roller 27, which is an intermediate cleaning member, is brought into contact with the outer peripheral surface of the suction roller 21 described in the first embodiment, and the conductive roller 27 is rotated at about 20 mm / s. It is driven to rotate in the direction of arrow c at the peripheral speed. The conductive roller 27
Cleaning means 23 for removing the paper dust 22 adhering to the outer peripheral surface of the conductive roller 27 is provided on the outer peripheral portion of the.
The conductive roller 27 is formed of a conductive member having a resistance value of 10 6 Ω or less, and applies a voltage having a polarity opposite to that of the attraction roller 21.
【００２８】このような構成において、記録用紙１８を
搬送ベルト１９で搬送する画像形成時には、吸着ローラ
２１に−１０００Ｖの電圧をバイアス電源Ｖ1 から印加
し、導電性ローラ２７に＋１００Ｖの電圧をバイアス電
源Ｖ2 から印加し、それぞれ矢印ｂ，ｃ方向へ回転駆動
させる。吸着ローラ２１への電圧印加によりこの吸着ロ
ーラ２１と接触する記録用紙１８が帯電し、記録用紙１
８が搬送ベルト１９に静電吸着する。In such a structure, at the time of image formation in which the recording paper 18 is conveyed by the conveyor belt 19, a voltage of −1000 V is applied to the attraction roller 21 from the bias power source V 1, and a voltage of +100 V is biased to the conductive roller 27. It is applied from a power source V 2 and driven to rotate in the directions of arrows b and c, respectively. When the voltage is applied to the suction roller 21, the recording paper 18 contacting the suction roller 21 is charged, and the recording paper 1
8 is electrostatically attracted to the conveyor belt 19.
【００２９】吸着ローラ２１への電圧印加時において、
吸着ローラ２１の表面も帯電状態となるために記録用紙
１８の紙粉２２が付着する。吸着ローラ２１の表面に付
着した紙粉２２は、この吸着ローラ２１と逆極性の電圧
を印加されている導電性ローラ２７と接触したときに導
電性ローラ２７の表面へ吸着されて移動する。導電性ロ
ーラ２７の表面に移動した紙粉２２は、導電性ローラ２
７の回転に伴って運ばれた後にクリーニング部材２４と
接触することにより掻き落とされ、掻き落とされた紙粉
２２は紙粉ボックス２５に回収される。When a voltage is applied to the suction roller 21,
Since the surface of the suction roller 21 is also charged, the paper dust 22 of the recording paper 18 adheres. The paper dust 22 adhering to the surface of the suction roller 21 is attracted to the surface of the conductive roller 27 and moves when it comes into contact with the conductive roller 27 to which a voltage having a polarity opposite to that of the suction roller 21 is applied. The paper dust 22 that has moved to the surface of the conductive roller 27 is
The paper dust 22 scraped off by being brought into contact with the cleaning member 24 after being carried along with the rotation of 7, is collected in the paper dust box 25.
【００３０】従って、吸着ローラ２１の外周面に付着し
た紙粉２２が徐々に増えて吸着ローラ２１の表面の電気
抵抗が大きくなることを防止できる。このため、吸着ロ
ーラ２１の表面の電気抵抗が大きくなることに伴う、記
録用紙１８を帯電させる吸着性能の低下を防止できる。Therefore, it is possible to prevent the paper dust 22 adhering to the outer peripheral surface of the suction roller 21 from gradually increasing and increasing the electric resistance of the surface of the suction roller 21. For this reason, it is possible to prevent the deterioration of the suction performance for charging the recording paper 18 due to the increase in the electric resistance of the surface of the suction roller 21.
【００３１】このため、画像形成を長時間にわたって連
続して行った場合でも、記録用紙１８を良好に帯電させ
ることができ、搬送ベルト１９への記録用紙１８の静電
吸着を良好に行える。これにより、搬送ベルト１９への
記録用紙１８の静電吸着状態が弱いために生ずる、記録
用紙１３の用紙ジャム、記録用紙１８の搬送不良、転写
時の画像ズレ等の発生を防止できる。Therefore, even if the image formation is continuously performed for a long time, the recording paper 18 can be charged well, and the electrostatic attraction of the recording paper 18 to the transport belt 19 can be excellently performed. As a result, it is possible to prevent the occurrence of a paper jam of the recording paper 13, a poor conveyance of the recording paper 18, an image shift at the time of transfer, etc., which is caused by the weak electrostatic attraction of the recording paper 18 to the conveyor belt 19.
【００３２】本実施の形態では、吸着ローラ２１の外周
面に付着した紙粉２２を除去するにあたり、吸着ローラ
２１と逆極性の電圧を印加している導電性ローラ２７の
外周面に吸着させるため、紙粉２２を吸着ローラ２１か
ら除去する性能が第一の実施の形態に比べて高くなり、
これに伴って、搬送ベルト１９への記録用紙１８の吸着
性能がさらに高くなる。In the present embodiment, in removing the paper dust 22 adhering to the outer peripheral surface of the suction roller 21, the paper dust 22 is adsorbed on the outer peripheral surface of the conductive roller 27 to which a voltage having a polarity opposite to that of the suction roller 21 is applied. The performance of removing the paper dust 22 from the suction roller 21 is higher than that of the first embodiment,
Along with this, the suction performance of the recording paper 18 to the transport belt 19 is further enhanced.
【００３３】つぎに、本発明の第四の実施の形態を図４
に基づいて説明する。本実施の形態は、吸着部材とし
て、吸着ローラ２１に代えて吸着ブラシ２６を設けたも
のであり、この吸着ブラシ２６の外周部と接触する導電
性ローラ２７やクリーニング手段２３を設けている点は
第三の実施の形態と同じである。Next, a fourth embodiment of the present invention will be described with reference to FIG.
It will be described based on. In the present embodiment, a suction brush 26 is provided as the suction member instead of the suction roller 21, and the conductive roller 27 and the cleaning means 23 that come into contact with the outer peripheral portion of the suction brush 26 are provided. This is the same as the third embodiment.
【００３４】このような構成において、吸着ブラシ２６
は吸着ローラ２１に比べて記録用紙１８との接触面積が
大きいため、記録用紙１８に対する電圧印加の性能が高
くなり、また、紙粉２２を吸着して除去する性能も高く
なる。In such a structure, the suction brush 26
Since the contact area with the recording paper 18 is larger than that of the suction roller 21, the performance of applying voltage to the recording paper 18 is improved, and the performance of adsorbing and removing the paper dust 22 is also improved.
【００３５】つぎに、本発明の第五の実施の形態を図５
及び図６に基づいて説明する。本実施の形態は、吸着部
材として吸着チャージャ２８を設け、吸着チャージャ２
８の表面に接触する中間クリーニング部材として導電性
ブラシ２９を設けたものである。前記導電性ブラシ２９
の外周部には、この導電性ブラシ２９の外周部に付着し
た紙粉２２を除去するクリーニング手段２３を設ける。
前記導電性ブラシ２９は矢印ｃ方向へ回転駆動するよう
に設け、抵抗値が１０6 Ω以下の導電性部材で形成し、
前記吸着チャージャ２８とは逆極性の電圧を印加する。Next, a fifth embodiment of the present invention will be described with reference to FIG.
A description will be given based on FIG. In the present embodiment, the suction charger 28 is provided as a suction member, and the suction charger 2
A conductive brush 29 is provided as an intermediate cleaning member that comes into contact with the surface of No. 8. The conductive brush 29
A cleaning means 23 for removing the paper dust 22 adhering to the outer peripheral portion of the conductive brush 29 is provided on the outer peripheral portion.
The conductive brush 29 is provided so as to be rotationally driven in the direction of arrow c, and is formed of a conductive member having a resistance value of 10 6 Ω or less,
A voltage having a polarity opposite to that of the adsorption charger 28 is applied.
【００３６】前記吸着チャージャ２８は、断面形状が円
筒形のグリッド３０と、この中心部に張ったワイヤ３１
と、グリッド３０の両端に位置するガイドリング３２と
からなる。ガイドリング３２は、ＡＢＳなどの樹脂で形
成し、ワイヤ３１の端部を保持する機能と、グリッド３
０の外周面と搬送ベルト１９や記録用紙１８との間隔を
規制する機能とを有する。この吸着チャージャ２８に
は、矢印ｂ方向へ回転駆動させる回転駆動機構が連結し
てある。The attraction charger 28 has a grid 30 having a cylindrical cross section and a wire 31 stretched at the center thereof.
And the guide rings 32 located at both ends of the grid 30. The guide ring 32 is made of a resin such as ABS and has a function of holding the end portion of the wire 31 and the grid 3
It has a function of regulating the distance between the outer peripheral surface of 0 and the conveyor belt 19 or the recording paper 18. A rotation drive mechanism for rotating the suction charger 28 in the direction of arrow b is connected to the suction charger 28.
【００３７】このような構成において、記録用紙１８を
搬送ベルト１９で搬送する画像形成時には、吸着チャー
ジャ２８のグリッド３０には−１０００Ｖの電圧をバイ
アス電源Ｖ1 から印加し、ワイヤ３１には−６．５ｋＶ
の電圧をバイアス電源Ｖ3 から印加し、導電性ブラシ２
９には＋１００Ｖの電圧をバイアス電源Ｖ2 から印加
し、吸着チャージャ２８と導電性ブラシ２９とをそれぞ
れ矢印ｂ，ｃ方向へ回転駆動させる。In such a structure, when the recording paper 18 is conveyed by the conveyor belt 19, a voltage of -1000 V is applied from the bias power source V 1 to the grid 30 of the suction charger 28 and -6 is applied to the wire 31. 0.5 kV
Voltage is applied from the bias power source V 3 , and the conductive brush 2
A voltage of +100 V is applied to 9 from the bias power supply V 2 , and the attraction charger 28 and the conductive brush 29 are rotationally driven in the directions of arrows b and c, respectively.
【００３８】吸着チャージャ２８への電圧印加により、
グリッド３０とワイヤ３１との間でコロナ放電が起こ
り、このコロナ放電により記録用紙１８が帯電し、記録
用紙１８が搬送ベルト１９に静電吸着する。このコロナ
放電により記録用紙１８を帯電させる場合には、上述し
た各実施の形態のように接触により帯電させる場合に比
べ、帯電性能が高くなり、記録用紙１８の搬送ベルト１
９への吸着性能が高くなる。By applying a voltage to the adsorption charger 28,
Corona discharge occurs between the grid 30 and the wire 31, and the recording paper 18 is charged by the corona discharge, and the recording paper 18 is electrostatically attracted to the transport belt 19. When the recording paper 18 is charged by this corona discharge, the charging performance is higher than that in the case where the recording paper 18 is charged by contact as in the above-described respective embodiments.
The adsorption performance to 9 becomes high.
【００３９】吸着チャージャ２８への電圧印加時におい
て、上述した各実施の形態に比べてグリッド３０の表面
が強く帯電しているため、記録用紙１８の紙粉２２も付
着しやすくなる。しかし、グリッド３０の表面に付着し
た紙粉２２は、この吸着チャージャ２８と逆極性の電圧
を印加されている導電性ブラシ２９と接触したときに導
電性ブラシ２９の表面へ吸着されて移動する。導電性ブ
ラシ２９の表面に移動した紙粉２２は、導電性ブラシ２
９の回転に伴って運ばれた後にクリーニング部材２４と
接触することにより掻き落とされ、掻き落とされた紙粉
２２は紙粉ボックス２５に回収される。When the voltage is applied to the attraction charger 28, the surface of the grid 30 is more strongly charged than in the above-described respective embodiments, so that the paper dust 22 of the recording paper 18 is also likely to adhere. However, the paper dust 22 adhering to the surface of the grid 30 is attracted to the surface of the conductive brush 29 and moves when it comes into contact with the conductive brush 29 to which a voltage having a polarity opposite to that of the attraction charger 28 is applied. The paper dust 22 that has moved to the surface of the conductive brush 29 is generated by the conductive brush 2
After being carried along with the rotation of 9, the paper dust 22 is scraped off by coming into contact with the cleaning member 24, and the scraped paper dust 22 is collected in the paper dust box 25.
【００４０】従って、グリッド３０の表面に付着した紙
粉２２が徐々に増え、コロナ放電による記録用紙１８の
吸着性能が低下するとことを防止でき、記録用紙１８の
搬送ベルト１９への吸着性能を高くすることができる。
これにより、搬送ベルト１９への記録用紙１８の静電吸
着を良好に行うことができ、搬送ベルト１９への記録用
紙１８の静電吸着状態が弱いために生ずる、記録用紙１
３の用紙ジャム、記録用紙１８の搬送不良、転写時の画
像ズレ等の発生を防止できる。Therefore, it is possible to prevent the paper dust 22 adhering to the surface of the grid 30 from gradually increasing and the suction performance of the recording paper 18 from deteriorating due to corona discharge, and to enhance the suction performance of the recording paper 18 to the conveyor belt 19. can do.
As a result, the electrostatic attraction of the recording paper 18 to the transport belt 19 can be favorably performed, and the electrostatic attraction of the recording paper 18 to the transport belt 19 is weak.
It is possible to prevent the occurrence of the paper jam of No. 3, the conveyance failure of the recording paper 18 and the image shift at the time of transfer.
【００４１】[0041]
【発明の効果】請求項１記載の発明によれば、吸着部材
の表面に付着した紙粉を除去することにより、記録用紙
を良好に帯電させることができ、記録用紙の搬送ベルト
への吸着性能を高くできる。According to the first aspect of the invention, by removing the paper dust adhering to the surface of the adsorbing member, the recording paper can be favorably charged, and the performance of adsorbing the recording paper on the conveyor belt is improved. Can be raised.
【００４２】請求項２記載の発明によれば、吸着部材の
表面に付着した紙粉の除去性能をさらに高くでき、記録
用紙の搬送ベルトへの吸着性能をさらに高くできる。According to the second aspect of the present invention, it is possible to further improve the performance of removing the paper dust adhering to the surface of the suction member, and further improve the performance of sucking the recording paper onto the conveyor belt.
【００４３】請求項３記載の発明によれば、吸着チャー
ジャの表面への紙粉の付着により記録用紙の吸着性能が
低くなることを防止できる。According to the third aspect of the present invention, it is possible to prevent the suction performance of the recording paper from being deteriorated due to the attachment of the paper powder to the surface of the suction charger.
【図１】本発明の第一の実施の形態を示す正面図であ
る。FIG. 1 is a front view showing a first embodiment of the present invention.
【図２】本発明の第二の実施の形態を示す正面図であ
る。FIG. 2 is a front view showing a second embodiment of the present invention.
【図３】本発明の第三の実施の形態を示す正面図であ
る。FIG. 3 is a front view showing a third embodiment of the present invention.
【図４】本発明の第四の実施の形態を示す正面図であ
る。FIG. 4 is a front view showing a fourth embodiment of the present invention.
【図５】本発明の第五の実施の形態を示す正面図であ
る。FIG. 5 is a front view showing a fifth embodiment of the present invention.
【図６】吸着チャージャの構造を一部を切り欠いて示す
斜視図である。FIG. 6 is a perspective view showing a structure of a suction charger with a part cut away.
【図７】従来例の画像形成装置の全体構造を示す正面図
である。FIG. 7 is a front view showing the overall structure of a conventional image forming apparatus.
１８ 記録用紙 １９ 搬送ベルト ２１，２６，２８ 吸着部材 ２２ 紙粉 ２３ クリーニング手段 ２７，２９ 中間クリーニング部材 ２８ 吸着チャージャ 18 Recording Paper 19 Conveyor Belts 21, 26, 28 Adsorption Member 22 Paper Powder 23 Cleaning Means 27, 29 Intermediate Cleaning Member 28 Adsorption Charger
Claims (3)
向させて配置した搬送ベルトと、電圧の印加により前記
搬送ベルトとこの搬送ベルトで搬送する記録用紙とを帯
電させる吸着部材とを有し、前記搬送ベルトに静電吸着
させた前記記録用紙に対して前記印刷ステーションで形
成した画像を転写するようにした画像形成装置におい
て、前記吸着部材に付着した紙粉を除去するクリーニン
グ手段を設けたことを特徴とする画像形成装置。1. A conveyor belt, comprising: a conveyor belt disposed opposite to at least one printing station; and an adsorption member for charging the conveyor belt and a recording sheet conveyed by the conveyor belt by applying a voltage. An image forming apparatus configured to transfer an image formed at the printing station to the recording sheet that is electrostatically adsorbed on the sheet, and a cleaning unit that removes paper dust adhering to the adsorption member is provided. Image forming apparatus.
向させて配置した搬送ベルトと、電圧の印加により前記
搬送ベルトとこの搬送ベルトで搬送する記録用紙とを帯
電させる吸着部材とを有し、前記搬送ベルトに静電吸着
させた前記記録用紙に対して前記印刷ステーションで形
成した画像を転写するようにした画像形成装置におい
て、前記吸着部材とは逆極性の電圧を印加してこの吸着
部材の外周部に接触する中間クリーニング部材と、この
中間クリーニング部材に付着した紙粉を除去するクリー
ニング手段とを設けたことを特徴とする画像形成装置。2. A conveyor belt, comprising: a conveyor belt disposed opposite to at least one printing station; and a suction member for charging the conveyor belt and recording paper conveyed by the conveyor belt by applying a voltage. In an image forming apparatus configured to transfer an image formed at the printing station to the recording sheet electrostatically adsorbed on the sheet, an outer peripheral portion of the attracting member is applied by applying a voltage having a polarity opposite to that of the attracting member. An image forming apparatus comprising: an intermediate cleaning member that comes into contact with the intermediate cleaning member; and a cleaning unit that removes paper dust attached to the intermediate cleaning member.
ことを特徴とする請求項２記載の画像形成装置。3. The image forming apparatus according to claim 2, wherein a suction charger is provided as the suction member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7703596A JPH09267945A (en) | 1996-03-29 | 1996-03-29 | Image formation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7703596A JPH09267945A (en) | 1996-03-29 | 1996-03-29 | Image formation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09267945A true JPH09267945A (en) | 1997-10-14 |
Family
ID=13622513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7703596A Withdrawn JPH09267945A (en) | 1996-03-29 | 1996-03-29 | Image formation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09267945A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001310528A (en) * | 2000-05-01 | 2001-11-06 | Noritsu Koki Co Ltd | Printer |
| KR20150013303A (en) * | 2012-06-06 | 2015-02-04 | 반도 카가쿠 가부시키가이샤 | Cleaning device |
-
1996
- 1996-03-29 JP JP7703596A patent/JPH09267945A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001310528A (en) * | 2000-05-01 | 2001-11-06 | Noritsu Koki Co Ltd | Printer |
| KR20150013303A (en) * | 2012-06-06 | 2015-02-04 | 반도 카가쿠 가부시키가이샤 | Cleaning device |
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