JPS62299371A - Feeder in image-forming device - Google Patents
Feeder in image-forming deviceInfo
- Publication number
- JPS62299371A JPS62299371A JP61143679A JP14367986A JPS62299371A JP S62299371 A JPS62299371 A JP S62299371A JP 61143679 A JP61143679 A JP 61143679A JP 14367986 A JP14367986 A JP 14367986A JP S62299371 A JPS62299371 A JP S62299371A
- Authority
- JP
- Japan
- Prior art keywords
- belt
- transfer material
- image forming
- roller
- image
- 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
- 239000000463 material Substances 0.000 claims abstract description 73
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 230000002411 adverse Effects 0.000 abstract description 2
- 238000001179 sorption measurement Methods 0.000 description 9
- 230000001629 suppression Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 229910052745 lead Inorganic materials 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
Landscapes
- Facsimiles In General (AREA)
- Paper Feeding For Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
（イ）産業上の利用分野
本発明は、電子写真複写装置、レーザービーム、プリン
タ、印刷装置等の画像形成装置におけろシート材搬送装
置に係り、特に画像形成ステーション！！！２以上並置
したカラー画像形成装置に好適に用い得るシート材搬送
装置に関する。Detailed Description of the Invention 3. Detailed Description of the Invention (a) Industrial Application Field The present invention is applicable to a sheet material conveying device in an image forming apparatus such as an electrophotographic copying device, a laser beam printer, a printing device, etc. Especially the image forming station! ! ! The present invention relates to a sheet material conveying device that can be suitably used in two or more color image forming apparatuses arranged side by side.
（ロ）従来の技術
本出願によって、従来の１の画像形成ステーションを用
いるカラープリンタに代るものとして、ハイスピードの
感光ドラム並置型のカラープリンタが提案されている（
特開昭５８−２３０７４公報、特開昭５９−３１９７６
公報、特開昭５９−５０４６０公報参照）。ところが、
これら感光ドラム並置型のカラープリンタの場合には多
重転写時の色重ねずれが極めて大きな難問である。そこ
で、本出願人は、転写材の搬送に搬送ベルトを用い、該
ベルトを高精度に駆動すれば色重ねずれを防止できるこ
とを提案した（特開昭５９−２０４０６９公報、特開昭
５９−１６８４６７公報、特開昭５９−１８２１３９公
報、米国特許第４，５３１．８２８号参照）。(B) Prior art The present application proposes a high-speed photosensitive drum juxtaposition type color printer as an alternative to the conventional color printer using one image forming station (
JP-A-58-23074, JP-A-59-31976
(Refer to Japanese Patent Application Laid-Open No. 59-50460). However,
In the case of these photosensitive drum side-by-side color printers, color overlapping deviations during multiple transfers are an extremely difficult problem. Therefore, the present applicant has proposed that color overlapping deviations can be prevented by using a conveyor belt to convey the transfer material and driving the belt with high precision (Japanese Unexamined Patent Publications No. 59-204069, No. 59-168467). (See JP-A-59-182139 and US Pat. No. 4,531.828).
し→ 発明が解決しようとする問題点
ところで、搬送ベルトを高精度で駆動しても、該ベルト
に転写材を給送する給送ローラには、該ローラを駆動す
る駆動モータの回転数の不安定、該ローラの直径のバラ
ツキ及び傷心などによってワウフラッタが生じるが、該
フラッタに起因する転写材の第１色目の転写ずれに対す
る解決策がなかった。更に、搬送ベルトを高精度で駆動
するためには采送ベルト駆動源と、給送ローラ駆動源と
は別個のものであるのが良いが、このことが逆に第１色
目の画像プロセスを不安定にして転写ずれを起こし、多
重複写時の色重ねずれの要因となる不都合がある。→ Problems to be Solved by the Invention By the way, even if the conveyor belt is driven with high precision, the feed roller that feeds the transfer material to the belt has an inconsistency in the rotational speed of the drive motor that drives the roller. Although wow and flutter occurs due to stability, variation in the diameter of the roller, and damage to the center, there has been no solution to the transfer deviation of the first color of the transfer material caused by the flutter. Furthermore, in order to drive the conveyor belt with high precision, it is preferable that the feeding belt drive source and the feeding roller drive source be separate; There is a disadvantage that the transfer becomes stable and causes misalignment, which causes color overlapping misalignment during multiple copying.
また、第１色目の画像プロセスの不安定を解消するため
に、例えば本出願人によって、第１色口の画像形成ステ
ーションの感光ドラムから転写材の搬送方向長さより短
い距離に該感光ドラムと等価のドラムを配置して、該ド
ラムを感光ドラムと等しい周速で駆動する提案がなされ
ている（特開昭５９−４６６５９公報参照）。しかし、
感光ドラムは高精度で駆動せねばならず、等価のものを
更に付加することは極めて高価につき、また感光ドラム
と等価のドラムは転写材の搬送方向長さより短い距離に
配置されるので、はがき用紙や名刺用紙が用いられる場
合には実質上対応できない不都合がある。In addition, in order to eliminate the instability of the image process for the first color, for example, the applicant of the present invention has developed a method that is equivalent to the photosensitive drum at a distance shorter than the length of the transfer material in the conveying direction from the photosensitive drum of the image forming station of the first color. A proposal has been made to arrange a drum and drive the drum at the same circumferential speed as the photosensitive drum (see Japanese Patent Laid-Open No. 59-46659). but,
The photosensitive drum must be driven with high precision, and adding an equivalent one is extremely expensive.Also, the drum equivalent to the photosensitive drum is placed at a distance shorter than the length of the transfer material in the transport direction, so postcard paper When paper or business card paper is used, there is an inconvenience that cannot be practically dealt with.
（ロ）問題を解決するための手段
本発明は上述問題点を解消することを目的とするもので
あって、画像形成部と給送手段との間の搬送ベルトに臨
んで、画像形成に先だって両送ベルト上のシート材を該
搬送ベルトに押圧しかつ該搬送ベルｊ・に連れ回る回転
体を設けたことを特徴とするものである。(b) Means for Solving the Problem The present invention aims to solve the above-mentioned problems, and is directed to a conveyor belt between an image forming section and a feeding means, which This apparatus is characterized in that a rotating body is provided which presses the sheet material on both conveyor belts against the conveyor belt and rotates with the conveyor belt.
け） 作用
上述構成に基づいて、シート材が給送手段にて搬送ベル
ト上に給送されると、画像形成部の画像形成に先だって
、回転体がシート材を搬送ベルトに押圧しつつ連れ回り
、該シート材にたるみを形成し、或いは搬送ベルトに該
シート材を密着して、給送手段にて生じたワウフラッタ
の画像形成部への伝播を抑制する。(k) Operation Based on the above-described configuration, when the sheet material is fed onto the conveyor belt by the feeding means, the rotating body presses the sheet material against the conveyor belt and rotates with it, prior to image formation in the image forming section. , by forming a slack in the sheet material or by bringing the sheet material into close contact with a conveyor belt, propagation of wow and flutter generated in the feeding means to the image forming section is suppressed.
（へ）実施例
息下、図面に沿って、本発明の実施例について説明する
。(F) Embodiments Below, embodiments of the present invention will be described with reference to the drawings.
カラー電子写真複写装置Ｍは、第１図に示すように、装
置本体１略々中央部に第１から第４の４つの画像形成ス
テーションＰａ、Ｐｂ、Ｐｃ、Ｐｄを有すると共に、−
側方に転写材給送部２及び他側方に定着部３を備えてい
る。そして、上記各画像形成ステーションＰａ、Ｐｂ、
Ｐｃ、Ｐｄには、それぞれ専用の露光手段５ａ、５ｂ、
５ｃ。As shown in FIG. 1, the color electrophotographic copying apparatus M has four image forming stations Pa, Pb, Pc, and Pd, located approximately in the center of the apparatus main body 1, and -
A transfer material feeding section 2 is provided on one side and a fixing section 3 is provided on the other side. Each of the image forming stations Pa, Pb,
For Pc and Pd, dedicated exposure means 5a, 5b,
5c.
５ｄが設けられ、また専用の感光ドラム６ａ、６ｂ、６
ｃ、６ｄを備えた画像形成部７ａ、７ｂ。5d, and dedicated photosensitive drums 6a, 6b, 6
image forming sections 7a and 7b equipped with c and 6d;
７ｃ、７ｄが配設されてし１て、これら画像形成部７ａ
、７ｂ、７ｃ、７ｄには感光ドラム６ａ、６ｂ、６ｃ、
６ｄ周辺にそれぞれ専用の帯電器９ａ。7c and 7d are arranged, and these image forming sections 7a
, 7b, 7c, 7d have photosensitive drums 6a, 6b, 6c,
Dedicated chargers 9a are provided around 6d.
９ｂ、９ｃ、９ｄ、現像器１０ ａ、 １０ ｂ、 １
０ｃ、１０ｄ、転写部１１ ａ、 １１ ｂ、 １１
ｃ、 １１ｄ、クリーニング器１２ ａ、 １２
ｂ、 １２ ｃ。9b, 9c, 9d, developing device 10a, 10b, 1
0c, 10d, transfer parts 11a, 11b, 11
c, 11d, cleaning device 12 a, 12
b, 12 c.
１２ｄが配置されている。そして、各画像形成ステージ
：ｌ ：ｚＰａ、Ｐｂ、Ｐｃ、Ｐｄを貫通すル態様で感
光ドラム６ａ、６ｂ、６ｃ、６ｄの下方に転写材ｓｔｅ
ｍ送する甫送装置１３を構成する無端状の搬送ベルト１
５が搬送ベルト支持ローラ１６ａ、１６ｂ、１６ｃに張
架されており、また３￥搬送ベルト１５と上記転写材給
送部２との間には給送ローラ対１７が設けられていて、
該搬送ベルト１５は給送ローラ対１７にて給送された転
写材Ｓを載置し、第１から第４の画像形成ステーション
Ｐａ、Ｐｂ、Ｐｃ、Ｐｄのそれぞれの転写部１１ａ、
１ ｌ ｂ、 １１ ｃ、 １１ ｄを通してｔ
ｎ送する。12d is arranged. Then, the transfer material ste is placed below the photosensitive drums 6a, 6b, 6c, and 6d in a manner that passes through each image forming stage: zPa, Pb, Pc, and Pd.
An endless conveyor belt 1 constituting a conveyance device 13 that conveys m
A pair of feeding rollers 17 is provided between the conveying belt 15 and the transfer material feeding section 2,
The conveyor belt 15 carries the transfer material S fed by the pair of feed rollers 17, and transfers the transfer portions 11a and 11a of each of the first to fourth image forming stations Pa, Pb, Pc, and Pd.
t through 1 l b, 11 c, 11 d
Send n.
一方、上記給送ローラ対１７と上記第１の画（ｆ形成ス
テージ３ンＰａの画像形成部７ａとの間には、搬送ベル
ト１５に臨んで、金属材等の導電材にて構成された押圧
ローラ１９が回転自在に配設されており、該押圧ローラ
１９は上記搬送ベルト１５上に載置された転写材Ｓを該
搬送ベルト１５に押圧すると共に、回転する該搬送ベル
ト１５に接触して連れ回り、或いは該転写材Ｓを介して
該搬送ベルト１５に連れ回る。なお、該抑圧ローラ１９
は回転する搬送ベルト１５に接触して連れ回る際に、該
ベルト１５が汚れていると、該押圧ローラ１９がゴム材
で構成されている場合には該ベルト１５の汚れが抑圧ロ
ーラ１９に移り、更に転写材Ｓにオフセットして転写材
Ｓに汚れが生じるが、抑圧ローラ１９が金属材等の導電
材で構成されている場合には、電荷のチャージアップを
防止でき、常に良好な状態を保つことができて、該抑圧
ローラ１９は全く汚れないことが実験により確認されて
いる。また、前記転写材給送部２の上方に符号２０で示
すものは該給送部２の給紙ローラである。On the other hand, between the pair of feeding rollers 17 and the image forming section 7a of the first image (f forming stage 3) Pa, there is provided an image forming section 7a facing the conveyor belt 15 and made of a conductive material such as a metal material. A pressure roller 19 is rotatably disposed, and the pressure roller 19 presses the transfer material S placed on the conveyance belt 15 against the conveyance belt 15, and also contacts the rotating conveyance belt 15. or the conveyor belt 15 via the transfer material S. Note that the suppression roller 19
When the belt 15 contacts and rotates with the rotating conveyance belt 15, if the belt 15 is dirty, the dirt on the belt 15 will be transferred to the suppression roller 19 if the pressure roller 19 is made of rubber material. Furthermore, the transfer material S is offset and dirt is generated on the transfer material S. However, if the suppression roller 19 is made of a conductive material such as a metal material, it is possible to prevent the charge-up and keep it in a good condition at all times. It has been confirmed through experiments that the suppression roller 19 can be maintained without any dirt. Furthermore, what is indicated by the reference numeral 20 above the transfer material feeding section 2 is a paper feeding roller of the feeding section 2.
上述構成のカラー電子写真複写装置Ｍは、まず、第１の
画像形成ステーションＰａの帯電器９ａ及び露光手段５
８等の公知の電子写真手段により感光ドラム６ａ上に原
稿画像のイエロー成分色の潜像が形成された後、現像器
１０ａでイエロートナーを有する現像剤により可視画像
が形成される。The color electrophotographic copying apparatus M having the above-mentioned configuration first includes the charger 9a and the exposure means 5 of the first image forming station Pa.
After a latent image of the yellow component color of the original image is formed on the photosensitive drum 6a by a known electrophotographic means such as 8, a visible image is formed by a developer containing yellow toner in the developing device 10a.
そして、転写材給送部２から転写材Ｓが給送ローラ対１
７にて搬送ベルト１５上に給送・載置され、更に押圧ロ
ーラ１９を介して、転写材Ｓは搬送ベルト１５により第
１の画像形成ステーションＰａにおける画像形成部７ａ
の転写部１１ａに搬送され、該転写部１１ａにてイエロ
ー）・ナー像を転写されて、転写材Ｓにイエロー画像が
形成される。Then, the transfer material S is transferred from the transfer material feeding section 2 to the feeding roller pair 1.
The transfer material S is fed and placed on the conveyor belt 15 at step 7, and further passed through the press roller 19.
The toner image is transferred to the transfer section 11a, and a yellow image is formed on the transfer material S.
一方、上記イエロー画像が転写材Ｓに形成されている間
に、第２の画像形成ステーションＰｂではマゼンタ成分
色の潜像が形成され、続いて現像器１０ｂでマゼンタト
ナーによるトナー像が形成され、先の第１の画像形成ス
テーションＰａで転写が終了した転写材Ｓが第２の画像
形成ステーションｐｂの転写部１１ｂに搬送されると、
該転写材Ｓの所定の位置にマゼンタトナー像が転写され
る。On the other hand, while the yellow image is being formed on the transfer material S, a latent image of magenta component color is formed at the second image forming station Pb, and then a toner image of magenta toner is formed at the developing device 10b, When the transfer material S whose transfer has been completed at the first image forming station Pa is conveyed to the transfer section 11b of the second image forming station pb,
A magenta toner image is transferred to a predetermined position on the transfer material S.
以下、シアン色、ブラック色について同様に画像形成が
行われ、転写材Ｓ上に４色のトナー像の重ね合せが終了
すると、転写材Ｓは定着部３で定着され、転写材Ｓに多
色（フルカラー）画像が得られる。なお、この際、搬送
ベルト１５のワウフラッタ周期は、相互に隣接する各転
写部１１ａ。Thereafter, image formation is performed in the same manner for cyan and black colors, and when the superposition of the four-color toner images on the transfer material S is completed, the transfer material S is fixed in the fixing section 3, and the multicolor toner images are fixed on the transfer material S. (Full color) image is obtained. Note that at this time, the wow and flutter period of the conveyor belt 15 is the same as that of each adjacent transfer portion 11a.
１１ｂ、 １１ｃ、 ｌｉｄ間においてそれぞれ整数分
の１であって、該ワウフラッタが許容されながらも実質
上色重ねずれは生じない（特開昭５９−１８２１３９公
報参照）。そして、転写を終了したそれぞれの恐光ドラ
ム６ａ、６ｂ、６ｃ、６ｄはクリーニングＭ１２ａ、１
２ｂ、１２ｃ、１２ｄで残留トナーを除去され、引き続
き行われろ次の潜像形成に備えろ。11b, 11c, and lid are each a fraction of an integer, and although the wow and flutter is allowed, color overlapping deviation does not substantially occur (see Japanese Patent Laid-Open No. 182139/1983). Then, the photosensitive drums 6a, 6b, 6c, 6d after the transfer are cleaned by cleaning M12a, 1
The residual toner is removed in steps 2b, 12c, and 12d, and the process is continued to prepare for the next latent image formation.
ところで、上述のように、転写材Ｓが転写材給送部２か
ら給送ローラ対１７にて搬送ベルト１５上に給送・載置
される際に、該転写材Ｓは給送ローラ対１７に挾持され
て、回転を停止した搬送ベルト１５と押圧ローラ１９と
のニップ部に給送され、該ニップ部で先端部の進行を規
制されてたるみ（ループ）を形成する。そこで、搬送ベ
ルト１５が回転を開始すると、抑圧ローラ１９が転写材
Ｓを搬送ベルト１５に押圧しながら飛送ベル）・１５に
連れ回り、転写材Ｓが押圧四−ラ１９と給送ローラ対１
７との間でたるみを保持した状態で第１色目の画像を形
成する第１の画像形成ステーションＰａの転写部１１ａ
に搬送されるようにするか、また、給送ローラ対１７の
転写材給送部度を搬送ベルト１５の転写材搬送速度より
ｉかに速くして転写材Ｓにたるみを形成し、抑圧ローラ
１９で該転写材Ｓを押圧し、たるみを保持しつつ搬送す
るようにする。従って、−Ｆ記給送ローラ対１７は、該
給送ローラ対１７を駆動するモータの回転数の不安定、
ローラの直径のバラツキ、或いは傷心などによって様々
なワウフラッタを生じるが、該ワウフラッタは上記たる
みによって第１色目の転写部１１ａへの伝播を抑制され
て、転写部】１ａに何らの悪影響を及ぼすことがなくな
り、転写材Ｓに良好な転写画像が得られる。By the way, as described above, when the transfer material S is fed and placed on the conveyor belt 15 from the transfer material feeding section 2 by the feed roller pair 17, the transfer material S is fed and placed on the conveyor belt 15 by the feed roller pair 17. The sheet is held between the conveyor belt 15, which has stopped rotating, and the press roller 19, and is fed to the nip between the conveyor belt 15, which has stopped rotating, and the press roller 19, and the nip restricts the forward end of the sheet, forming a slack (loop). Therefore, when the conveyor belt 15 starts rotating, the suppression roller 19 presses the transfer material S against the conveyor belt 15 and rotates along with the transport bell 15, and the transfer material S is moved between the press roller 19 and the feed roller. 1
The transfer section 11a of the first image forming station Pa forms an image of the first color while maintaining slack between the transfer unit 11a and the transfer unit 11a of the first image forming station Pa
Alternatively, the speed at which the transfer material is fed by the pair of feeding rollers 17 is made i faster than the transfer material conveyance speed of the conveyor belt 15 to form a slack in the transfer material S, and the pressure roller At step 19, the transfer material S is pressed so that the transfer material S is conveyed while maintaining the slack. Therefore, the -F feed roller pair 17 is affected by the instability of the rotational speed of the motor that drives the feed roller pair 17.
Various types of wow and flutter occur due to variations in the diameter of the roller or damage to the center of the roller, but the wow and flutter is suppressed from propagating to the first color transfer section 11a by the sag, and does not have any adverse effect on the transfer section 1a. Therefore, a good transferred image can be obtained on the transfer material S.
ついで、第２図に基づき、上述搬送装置１３の構成を一
部変更した他の実施例について説明する。Next, another embodiment in which the configuration of the above-mentioned conveying device 13 is partially changed will be described based on FIG.
本実施例の搬送装置１３ｍには、第２図に示すように、
上述押圧ローラ１９と第１の画像形成ステーションＰａ
の間に搬送ベルト１５に臨んで、上部吸着帯電器２１及
び上部吸着帯電器２２が設けられており、該上部吸着帯
電器２１は、転写部１１ ａ、 １１ ｂ、 １１
ｃ、 １１ ｄを構成する転写帯電器と逆の極性が
与えられ、また該下部吸着帯電器２２には上記転写帯電
器と同一の極性が与えられていて、これら上下の吸着帯
ＷＷＪ２１．２２にて転写材Ｓが索送ベル！・１５上に
静電吸着されて搬送される。As shown in FIG. 2, the conveyance device 13m of this embodiment includes:
The above-mentioned pressing roller 19 and the first image forming station Pa
An upper attraction charger 21 and an upper attraction charger 22 are provided facing the conveyor belt 15 between the transfer parts 11a, 11b, 11.
The lower adsorption charger 22 is given the same polarity as the transfer charger, and these upper and lower adsorption bands WWJ21.22 The transfer material S is sent out!・It is electrostatically attracted onto 15 and transported.
上述構成の搬送装置１３ａは、まず転写材給送部２から
転写材Ｓが給送ローラ対１７にて搬送ベルト１５に給送
されて、該搬送ベルト１５上に載置される。そこで、該
転写材Ｓは、回転する搬送ベルト１５に連れ回る押圧ロ
ーラ１９にて搬送ベルト１５に押圧されながら上下の吸
着帯電Ｍ２１゜２２に至り、これら吸着帯電！２１．２
２によって搬送ベルト１５上に静電吸着されて、第１色
目の画像を形成する第１画像形成ステーンヨンＰａの転
写部１１ａｌＬ：ｌｌ送されろ。この際、上述転写材ｓ
４！ｔｉ送ベルト１５に押圧する抑圧ローラ１９が無い
場合には、転写材Ｓは搬送ベルト１５に上下の吸着帯電
９２１．２２によって静電吸着されても、給送ローラ対
１７のワウフラッタによって搬送ベルト１５との相対位
置がずらされて、静電吸着力が著しく低下し、また、転
写部１１ａを通過する際にも、上下の吸着帯電器２１．
２２による静電吸着力のみでは給送ローラ対１７のワウ
フラッタに起因する色重ねずれを防止することができな
いが、上記押圧ローラ１９にて転写材Ｓを搬送ベルト１
５に押圧し、転写材Ｓを挾持・搬送する給送ローラ対１
７の転写材搬送速度を搬送ベルト１５の転写材搬送速度
より僅かに遅くすると転写材Ｓの静電吸着力が強固なも
のとなって、給送ローラ対１７のワウフラッタの転写部
１１ ａへの伝播が抑制され、ワウフラッタに起因する
外乱が消滅する。In the conveying device 13a having the above-described structure, first, the transfer material S is fed from the transfer material feeding section 2 to the conveying belt 15 by the pair of feeding rollers 17, and is placed on the conveying belt 15. Then, the transfer material S is pressed against the conveyor belt 15 by the pressing roller 19 that rotates together with the rotating conveyor belt 15, and reaches the upper and lower attracting charges M21 and 22, and these attracting charges! 21.2
2, the first image forming stain Pa is electrostatically attracted onto the conveyor belt 15 to form an image of the first color. At this time, the above-mentioned transfer material s
4! If there is no suppression roller 19 that presses the conveyor belt 15, even if the transfer material S is electrostatically attracted to the conveyor belt 15 by the upper and lower attraction charges 921.22, the wow and flutter of the pair of feed rollers 17 causes the conveyor belt 15 The relative position with respect to the upper and lower attraction chargers 21. is shifted, and the electrostatic attraction force is significantly reduced.
Although it is not possible to prevent color overlapping deviation caused by wow and flutter of the pair of feeding rollers 17 with only the electrostatic adsorption force of the feeding roller pair 17, the pressure roller 19 moves the transfer material S onto the conveying belt 1.
A pair of feeding rollers 1 that press the roller 5 and pinch and convey the transfer material S.
When the transfer material conveyance speed 7 is made slightly slower than the transfer material conveyance speed of the conveyor belt 15, the electrostatic adsorption force of the transfer material S becomes strong, and the wow and flutter of the feed roller pair 17 is reduced to the transfer portion 11a. Propagation is suppressed and disturbances caused by wow and flutter disappear.
更に、第３図に基づき、上述上部吸着帯電器２１に代え
て、抑圧ローラ１９ａを配設した、更に変更した実施例
について説明する。Furthermore, based on FIG. 3, a further modified embodiment in which a suppression roller 19a is provided in place of the above-mentioned upper attraction charger 21 will be described.
本実施例の搬送装置１３ｂは、第３図に示すように、下
部吸着帯電器２２に対向して、上述上部吸着帯電Ｗ２１
に代えて、上述押圧ローラ１９と同一の構成の抑圧ロー
ラ１９ｇが配置されており、更に加えて該押圧ローラ１
９ａはアースに落されている。As shown in FIG. 3, the conveyance device 13b of this embodiment has the above-mentioned upper attraction charger W21 facing the lower attraction charger 22.
Instead, a suppression roller 19g having the same configuration as the above-mentioned pressure roller 19 is arranged, and in addition, the pressure roller 1
9a is grounded.
本実施例の構成：こよると、転写材Ｓの静電吸着力は抑
圧四−ラ１９ａと下部吸着帯電器２２との組合せによっ
て得ることができ、また搬送ベルト１５はスクリーンメ
ツシュでモ、フィルムベルトでもよいことになる。Configuration of this embodiment: Accordingly, the electrostatic adsorption force of the transfer material S can be obtained by the combination of the suppression four-ra 19a and the lower adsorption charger 22, and the conveyor belt 15 is made of a screen mesh. A film belt would also work.
なお、上述実施例においては、多色カラー（フルカラー
）画像で説明したが、これに限らず、単色でも２以上の
カラーでもよい。In the above-mentioned embodiment, a multicolor (full color) image was described, but the image is not limited to this, and may be a single color or two or more colors.
また、画像形成は、電子写真法に限らず、熱転写法や、
従来の印刷技術等でもよい。In addition, image formation is not limited to electrophotography, but also thermal transfer,
Conventional printing techniques etc. may be used.
（ト） 発明の詳細
な説明したように、本発明によると、画像形成部の画像
形成に先だって、回転体がシート材を搬送ベルトに押圧
しつつ連れ回り、該ンート材にたるみを形成し、或いは
搬送ベルトに該シート材を密着して給送手段にて生じた
ワウフラッタの第１の画像形成部への伝播を抑制するよ
うにしたので、用いられるシー）・材のサイズの別なく
、藺単に給送手段に起因する第１色目の画像のずれを防
止することができ、従って多重画像形成時の色重ねずれ
を簡単かつ容易に解消することができる。(G) As described in detail, according to the present invention, prior to image formation in the image forming section, the rotating body rotates while pressing the sheet material against the conveyor belt, forming a slack in the sheet material, Alternatively, since the sheet material is closely attached to the conveyor belt to suppress the propagation of wow and flutter generated by the feeding means to the first image forming section, the It is possible to prevent the displacement of the first color image simply due to the feeding means, and therefore it is possible to simply and easily eliminate the color overlapping displacement during multiple image formation.
また、回転体を金属等の導電体にて構成すると、電荷の
チャージアップを防止でき、回転体を常に良好な状態に
保つことができて、何らのクリーニング手段も必要とし
ない。Further, if the rotating body is made of a conductive material such as a metal, it is possible to prevent charge-up, and the rotating body can be kept in good condition at all times, and no cleaning means is required.
第１図は本発明の実施例に係る搬送装置を備えたカラー
電子写真複写装置の側面図、第２図はその一部変更した
搬送装置を示す一部省略した側面図で、第３図はその更
に変更した搬送装置を示す一部省略した側面図である。
Ｍ・・・画像形成装置（カラー電子写真複写装置）、Ｓ
・・シート材（転写材） 、 ７ａ・・・画像形成部（
第１の画像形成ステーションの画像形成部）、１３．１
３ａ・・・搬送装置 、 １５・・・搬送ベルト 、
１７・・給送手段（給送ローラ対） 、１９．１９ａ
・・・回転体（抑圧ローラ）、２１．２２・・吸着帯電
型（上部吸着帯電器、下部吸着帯電話） 。FIG. 1 is a side view of a color electrophotographic copying machine equipped with a conveying device according to an embodiment of the present invention, FIG. 2 is a partially omitted side view showing a partially modified conveying device, and FIG. It is a partially omitted side view showing a further modified conveying device. M... Image forming device (color electrophotographic copying device), S
... Sheet material (transfer material), 7a... Image forming section (
Image forming section of first image forming station), 13.1
3a... Conveyance device, 15... Conveyance belt,
17...Feeding means (feeding roller pair), 19.19a
... Rotating body (suppressing roller), 21.22... Adsorption charging type (upper adsorption charger, lower adsorption charger phone).
Claims (5)
該搬送ベルトにシート材を給送する給送手段を備えてな
る画像形成装置において、 前記画像形成部と前記給送手段との間の前記搬送ベルト
に臨んで、画像形成に先だって前記搬送ベルト上のシー
ト材を該搬送ベルトに押圧しかつ該搬送ベルトに連れ回
る回転体を設けたことを特徴とする画像形成装置におけ
る搬送装置。(1) A conveyor belt that conveys the sheet material to the image forming section;
In an image forming apparatus comprising a feeding means for feeding a sheet material to the conveying belt, facing the conveying belt between the image forming section and the feeding means, the sheet material is placed on the conveying belt prior to image formation. What is claimed is: 1. A conveying device for an image forming apparatus, characterized in that a rotating body is provided which presses a sheet material onto the conveying belt and rotates with the conveying belt.
にたるみを形成するように構成した特許請求の範囲第１
項記載の画像形成装置における搬送装置。(2) Claim 1, wherein the rotating body is configured to form slack in the sheet material between it and the feeding means.
A conveyance device in the image forming apparatus described in 1.
第１項記載の画像形成装置における搬送装置。(3) A conveying device in an image forming apparatus according to claim 1, wherein the rotating body is a conductive roller.
囲第２項記載の画像形成装置における搬送装置。(4) A conveying device in an image forming apparatus according to claim 2, wherein the conductive roller is a metal roller.
吸着帯電器と共用する特許請求の範囲第１項記載の画像
形成装置における搬送装置。(5) A conveyance device in an image forming apparatus according to claim 1, wherein the rotating body is also used as an attraction charger that attracts the sheet material to the conveyance belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61143679A JPS62299371A (en) | 1986-06-19 | 1986-06-19 | Feeder in image-forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61143679A JPS62299371A (en) | 1986-06-19 | 1986-06-19 | Feeder in image-forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62299371A true JPS62299371A (en) | 1987-12-26 |
Family
ID=15344420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61143679A Pending JPS62299371A (en) | 1986-06-19 | 1986-06-19 | Feeder in image-forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62299371A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0265565U (en) * | 1988-11-07 | 1990-05-17 | ||
| JPH02182640A (en) * | 1989-01-06 | 1990-07-17 | Tokyo Electric Co Ltd | Image forming device |
| US8066281B2 (en) | 2005-08-11 | 2011-11-29 | Ricoh Company, Ltd. | Sheet tip contacting belt conveying apparatus and image forming apparatus |
-
1986
- 1986-06-19 JP JP61143679A patent/JPS62299371A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0265565U (en) * | 1988-11-07 | 1990-05-17 | ||
| JPH02182640A (en) * | 1989-01-06 | 1990-07-17 | Tokyo Electric Co Ltd | Image forming device |
| US8066281B2 (en) | 2005-08-11 | 2011-11-29 | Ricoh Company, Ltd. | Sheet tip contacting belt conveying apparatus and image forming apparatus |
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