JPS5895768A - Mylar separating mechanism in electronic copier - Google Patents

Abstract

PURPOSE:To separate transfer paper exactly without being wound around a photosensitive body in case of a possible separating current setting error, abnormal sail of transfer paper, and double feed, by providing a paired unit of 2 main and auxiliary Mylars. CONSTITUTION:An air blow-out part 13 is a case body to blow out air from a blow-out port 22 using a slit at the tip. A supporting plate 23 is provided as one body with the blow-out part 13 or by being fixed, and a main Mylar 24 is fixed by a fitting plate 25. The main Mylar 24 is held in almost the same plane with the rear surface of the blow-out port 22, and to the upper circumference of the blow-out port 22, an auxiliary Mylar 26 is held fixed by a fitting plate 27. Width of the auxiliary Mylar 26 is same as width of the blow-out port 22, and width extending to the blow-out part 13 and the supporting plate 23 is about 2/3 of width of a photosensitive drum 1. As for the auxiliary Mylar 26, a small ''Mylar '' having small width is adhered to fix to the tip.

Description

【発明の詳細な説明】 本発明は電子複写機に於ける感光体と転写紙の補助的な
分離機構に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an auxiliary separation mechanism between a photoreceptor and a transfer paper in an electronic copying machine.

感光体を使った複写機に於いては感光体上の画像を紙に
印画する為感光体と感光紙を一時的に接触させる工程が
必費であり、かつ転写紙に画像が生じた段階で転写紙を
感光体から引き剥がす必費がある。この転写紙を感光体
から引き剥がす工程を分離工程と呼ぶが、この分離の為
の手段には大きく分けて次の二つがある。一つは予め転
写紙の側に分離幅と称する分離の為の未露光部分を設け
ておいてこの部分で強制的に機械的分離をする方法と、
もうひとつは交流電流とエアー吹付により分離させる静
電エアー分離方式である。前者の方法によると、分離性
能そのものとしては後者より確実であるが、未露光部分
がある為、その部分は常に画像が写らずいわば常に画像
欠損の状態である。後者の方法でほこの欠点はなく転写
紙全体に像を複写させることができるが、前者と比較し
て分離性能がいま−ひとつ不安定である。つまり分離電
流が周囲の温湿度によって大きく変動する為その設定が
困難であること、また紙の厚さやカールの方向によって
分離機能が大きく左右されること、更に給紙部ｌこ於い
て重送のあった時などの感光体への紙の巻き付き郷であ
る。In a copying machine that uses a photoreceptor, in order to print the image on the photoreceptor onto paper, a process of temporarily bringing the photoreceptor and photosensitive paper into contact is necessary, and at the stage when the image is formed on the transfer paper, There is a need to peel off the transfer paper from the photoreceptor. The process of peeling off the transfer paper from the photoreceptor is called a separation process, and there are two main methods for this separation: One method is to provide an unexposed area called a separation width on the side of the transfer paper in advance for separation and forcibly perform mechanical separation at this area.
The other method is an electrostatic air separation method that uses alternating current and air blowing to separate the particles. According to the former method, the separation performance itself is more reliable than the latter, but since there is an unexposed portion, an image is not always captured in that portion and the image is always in a state of image loss. Although the latter method does not have these drawbacks and allows images to be copied onto the entire transfer paper, the separation performance is somewhat unstable compared to the former method. In other words, it is difficult to set the separation current because it fluctuates greatly depending on the ambient temperature and humidity, and the separation function is greatly affected by the thickness of the paper and the direction of curl. This is the time when paper was wrapped around the photoreceptor.

本発明の目的はこの静電−エアー分離方式に於いて万一
の分離電流設定ミスや転写紙の異常カール、更には重送
などがあった場合に、転写紙を感光体に巻き付かせず、
確実番こ分離させる補助葡機構をｊｓ供することである
。The purpose of the present invention is to prevent the transfer paper from wrapping around the photoreceptor in the case of an error in setting the separation current, abnormal curling of the transfer paper, or double feeding in this electrostatic-air separation method. ,
It is to provide an auxiliary mechanism for reliable separation.

以下、本発明の実施例を図面ｌこ従って説明する。第１
図は電子複写機の＠面図である。光導電性絶縁体を外周
に層持する感光ドラム／は複写制作時図示矢印の反時計
方向に回動するように機枠に支持されており、感光ドラ
ムｌの周Ｈには所要の複写工程を行うように各装置が配
される。帯電器コにより一様に帯電された感光ドラムｌ
は原稿台Ｊ上の原稿を走査光源亭にて走。査した光像を
固定ミラーＳにて反射させ、光源ダの二分の−９の速度
で移動するレンズ６を透過してミラークにて反射して光
学系の窓より照射して感光ドラム／上に静電潜像を形成
し、現体ｓｌにてトナーが附与され潜像は可視化され。Embodiments of the present invention will be described below with reference to FIG. 1st
The figure is a @ side view of the electronic copying machine. The photosensitive drum / having a photoconductive insulator layered on its outer periphery is supported by the machine frame so as to rotate in the counterclockwise direction shown by the arrow during copying. Each device is arranged to perform the following. Photosensitive drum uniformly charged by a charger
The original on the manuscript table J is scanned by the scanning light source. The scanned light image is reflected by a fixed mirror S, transmitted through a lens 6 that moves at -9 times the speed of the light source, reflected by a mirror, and irradiated through the window of the optical system onto the photosensitive drum. An electrostatic latent image is formed, and toner is applied with developer SL to make the latent image visible.

給紙ｓｔから排出された転写紙はいくつかのロールを介
して転写電極ｌ／のある転写部まで導かれここで感光体
上の画像を写し取り、次に／Ｊの感光ドラムｌに相対す
る分離電極による電流と感光ドラム／に相対し設けられ
、エアーが転写紙と感光ドラムｌ関に吹出す吹田部／’
ｊからのエアーにより感光体ドラム／から分離させられ
後部搬送ｉｌｌ／４１及び定着部ｌＳを通って機外に排
出される。−力感光ドラムｌは除電極１４にて除電され
、クリーニングブレード１ｇにより残留トナーをかき取
られ、イレーサーｌ！を通じて次の複写工程をくり返す
。The transfer paper discharged from the paper feed st is guided through several rolls to a transfer section where the transfer electrode l/ is located, where the image on the photoreceptor is transferred, and then it faces the photoreceptor drum l of /J. A Suita section is installed opposite the current generated by the separation electrode and the photosensitive drum, and air is blown out between the transfer paper and the photosensitive drum.
It is separated from the photoreceptor drum/41 by the air from j, and is discharged to the outside of the machine through the rear transport ill/41 and the fixing section IS. - The photosensitive drum l is neutralized by the removing electrode 14, residual toner is scraped off by the cleaning blade 1g, and the eraser l! repeat the following copying process.

殆んどのコピ一作業に於いては今述べたような正常なプ
ロセスで１１′：４が完成する。しかし前述したように
分離電流の環境依存性から来る微妙な設定値の狂い、環
境（温湿度）の大幅な振れ、転写紙の異常なり＆、ｆＭ
やカール、給紙部での重送等が発生すると、上述した分
離機構だけでは安定した分離性能は望めない。つまり第
１図の一部拡大図の第１図に見られるように１分離電流
や〜エアー吹付が働いているにもかかわらず感光体ｌ上
に転写＃ＩＯが巻き付いて離れない状態となり、ペーパ
ージャムとなることがある１ここでコＩは巻き付きを検
知して機械の駆動系を停止させる検知機構である。In most copy operations, 11':4 is completed through the normal process just described. However, as mentioned above, there are slight deviations in the setting values due to the environmental dependence of the separation current, large fluctuations in the environment (temperature and humidity), abnormalities in the transfer paper, etc.
If paper curl, double feeding at the paper feeding section, etc. occur, stable separation performance cannot be expected with the above-mentioned separation mechanism alone. In other words, as shown in Fig. 1, which is a partially enlarged view of Fig. 1, the transfer #IO is wrapped around the photoreceptor l and does not come off even though the 1-separation current and ~air blowing are working, and the paper is not released. Jamming may occur.1 Here, I is a detection mechanism that detects wrapping and stops the drive system of the machine.

さまざまな異常現象の発生にもかかわらず、この巻き付
きによるペーパージャムを未然に、しかも確実に防止す
る分離補助機構を医務こ述べる。This article describes a separation assisting mechanism that reliably prevents paper jams caused by paper wrapping, despite the occurrence of various abnormal phenomena.

第３図はエアー吹出部／Ｊに接着された分離用マイラー
の外観を斜視図で示し、第参図は機内に組み込まれた状
態を側面図で示す。エアー吹出部／、３は箱体で図示さ
れないホースでエアーが送り込まれ、吹出部は箱形で先
熾が感光ドラムｌの軸方向に従って長手が配されるスリ
ットの吹出ロコλよりエアーが吹出す。エアー吹＠＠／
３の側方にはエアー吹出部／Ｊの箱体吹出口の下向より
横方向に支持板コ３がエアー吹出部１３と一体又は固定
して設けられ、支持板コ３には主マイラー２ダが取付板
コ！にて押えられるようにして接着又はねじ止めして固
定される。即ち、主マイラー２ダは吹出口２２の下面と
ほぼ同一面となっている。エアー吹出部１３の吹出口−
−の上縁−こは副マイラー２４が固定され、副マイラー
ユ６は取付板コク−こて押えられるようにして接着又は
ねじ込めして固定される。副マイラー２４の幅は吹出口
Ｊ２の幅とほぼ同じであり、エアー吹出ｓ１３と支持板
コＪを加えた幅は感光ドラムｌの幅の約三分の二程度で
ある。副マイラーコロには小幅の小マイラーＪｔが副マ
イラーー６先熾に接着固定され吹出ロλコ前薗で副マイ
ラー２４に向って凸に湾曲して、該吹出口ココの下縁に
１ｉｔｒ固定されている。FIG. 3 shows a perspective view of the external appearance of the separating mylar bonded to the air blowing part/J, and FIG. The air blowing section /, 3 is a box body into which air is fed through a hose (not shown), and the blowing section is box-shaped, and air is blown out from the blowing loco λ of a slit whose tip is arranged in the axial direction of the photosensitive drum l. . Air blow @@/
A support plate 3 is integrally or fixedly provided with the air outlet 13 from below the box outlet of the air outlet/J on the side of the air outlet 3. Da is the mounting board! It is held in place by gluing or screwing. In other words, the main Mylar 2 da is substantially flush with the lower surface of the air outlet 22 . Air outlet of air blowing section 13 -
- Upper edge: The secondary Mylar 24 is fixed to this area, and the secondary Mylar 6 is fixed by gluing or screwing the mounting plate so as to be pressed down with a trowel. The width of the auxiliary Mylar 24 is almost the same as the width of the air outlet J2, and the width including the air outlet s13 and the support plate J is about two-thirds of the width of the photosensitive drum l. On the secondary Mylar roller, a small Mylar Jt with a small width is adhesively fixed to the tip of the secondary Mylar 6, curved convexly toward the secondary Mylar 24 at the front end of the blowing roller λ, and fixed to the lower edge of the blowing outlet by 1 itr. .

主マイラーｘｑ、＠マイラーａ基のマイラーフィルムの
厚みはＳＯ〜りＯμｍ程度が望ましいが、波打ちを防ぐ
為適当な補強が必要である。The thickness of the main Mylar xq and @Mylar a-based Mylar films is desirably approximately 0 μm, but appropriate reinforcement is required to prevent waviness.

主マイラーコクは７枚板形状であるが、副マイラーコロ
には上述したように裏備にペーパーガイド用の小マイラ
ーＸｔがついている。小マイラーコｔがｊｌｉｉｌｌｌ
だけについている理由はエアー吹出ロー−がある為、エ
アーの吹出しを阻害しない為である。取付けた状態は第
一図に示すように主マイラーコ参、副マイラーコロの先
端が感光ドラムｌの外周番こ軽く圧接している。The main Mylar body has a seven-plate shape, but the secondary Mylar body has a small Mylar Xt for a paper guide on the backing, as mentioned above. Small Mylarko T is jliill
The reason why it is attached only is because there is an air blowing low so that the air blowing is not obstructed. When installed, as shown in Figure 1, the tips of the main Mylar roller and the secondary Mylar roller are lightly pressed against the outer periphery of the photosensitive drum 1.

次に第５図乃至第７図で本発明の分離機構の具体的な作
用を説明する。第５図は分離電流、吹田エアー双方の分
離作用に逆って転写紙ＩＯが感光ドラムｌに巻きついて
きた状態を示す。Next, the specific operation of the separation mechanism of the present invention will be explained with reference to FIGS. 5 to 7. FIG. 5 shows a state in which the transfer paper IO has been wrapped around the photosensitive drum 1 against the separation action of both the separation current and the Suita air.

第６図は転写紙ｉｏのうち主副イラーコ４Ｉ＠の部分１
０Ｍが主マイラーコクにより分離された図である。副マ
イラーコ４　＠　７０８は吸着が弱まりながらもまだ完
全には分離されていない。Figure 6 shows part 1 of the main and sub-Iraco 4I@ of the transfer paper io.
It is a figure in which 0M is separated by the main mylar body. Although the adsorption of sub-Mylarco4@708 has weakened, it has not yet been completely separated.

第７図は転写紙１０が完全に分離された状態を示す。こ
の時開マイラー２６側の転写紙１０の先端ｉｏｓは嗣マ
イラーコロの兼備に貼っである小マイラーコｇのガイド
に沿って進む。小マイラーＪｔが無かった場合には転写
紙ｌＯの一部が吹出口２−の縁辺に当たり１分離効果が
無くなる危険性が大となる。FIG. 7 shows a state in which the transfer paper 10 is completely separated. At this time, the leading edge of the transfer paper 10 on the open Mylar 26 side advances along the guide of the small Mylar roller g attached to the second Mylar roller. If there were no small Mylar Jt, there would be a great risk that a part of the transfer paper 10 would hit the edge of the air outlet 2- and the one-separation effect would be lost.

本発明の実施例中主マイラーコ参のみ、或は副マイラー
コロのみの場合には次のような転写紙の挙動が起きる。In the embodiments of the present invention, when only the main Mylar roller or only the secondary Mylar roller is used, the following behavior of the transfer paper occurs.

まず主マイラーコ参のみの場合には、主マイラーコ参の
部分での分離は確実であるが、その他の部分が吹出部に
当たってしまい分離効果は無くなる。また副マイラーコ
基のみの場合には該マイラーとの接触部に於ける転写紙
の進入角度に問題があり殆んど分離しなくなる。即ち、
エアー吹付力が感光ドラム／に転写紙ＩＯを押付ける。First, in the case of only main Mylar ginseng, separation at the main Mylar ginseng part is reliable, but other parts hit the blowing part and the separation effect is lost. Further, in the case of only a secondary Mylar group, there is a problem with the approach angle of the transfer paper at the contact portion with the Mylar, and separation hardly occurs. That is,
The air blowing force presses the transfer paper IO against the photosensitive drum.

このように本発明での主、副二つのマイラーは一組で一
つの機能を果たす。In this way, in the present invention, the two main and sub mylars serve one function as a set.

本発明実施中主、副マイラーコ参、−６はこれをネジ止
めにすることにより、マイラーの感光体ドラムｌへの当
たりを調整式にすることが可、能である。つまり第を図
に見るように主マイラ　、−コク、副マイラーコ！、ｊ
ｅ２付板−ｊ、コアに長孔３０を穿設し、支持板コ３、
吹出部１３の吹出口部上面にタップ穴を設け、小ねじ２
９により主副イラーー夢、副マイラーコロを取付けると
最も適した位置に主副マイラーを取り付けるコトができ
る。また主マイラーコク、副マイラーコロの先端のエツ
ジを丸めることにより感光ドラム／の出し入れが容易と
なり、該エツジ部分のいたみが無くなる。更にマイラー
の替わりにテフロン系樹脂のフィルム等感光体にダメー
ジを与えることのないフィルムを使用することも可能で
ある。During the implementation of the present invention, the main and sub-Mylar Co., Ltd.-6 can be screwed to adjust the contact of the Mylar to the photoreceptor drum 1. In other words, as you can see in the figure, main Myra, - richness, secondary Myra! ,j
Plate-j with e2, a long hole 30 is bored in the core, and support plate 3,
A tapped hole is provided on the upper surface of the outlet part of the outlet part 13, and a machine screw 2 is inserted.
If you install the main and sub mylar rollers according to 9, you can install the main and sub mylar in the most suitable position. In addition, by rounding the edges of the main Mylar body and the secondary Mylar body, it becomes easy to take the photosensitive drum in and out, and there is no damage to the edges. Furthermore, instead of Mylar, it is also possible to use a film that does not damage the photoreceptor, such as a Teflon resin film.

次に本発明の詳細な説明する。前述してきたマイラー分
離機構を実機に装着して効果を見た。Next, the present invention will be explained in detail. The mylar separation mechanism described above was installed on an actual machine to see its effectiveness.

実機に於いてはこの装置が明らかに効果があることを証
明する為、分離電流をなくして確かめた。その結果この
マイラー分離機構がなかった場合には全数巻き付いたに
もかかわらずマイラー分離機構をつけた後では巻き付き
は一度もなかった。つまりすべてマイラーで分離された
。In order to prove that this device is clearly effective in an actual machine, we removed the separation current and confirmed it. As a result, even though all the pieces were wrapped without this Mylar separation mechanism, after the Mylar separation mechanism was installed, there was no wrapping at all. So everything was separated with mylar.

実際の複写機の使用状態を考えると分離電流を加えない
という状態は最悪条件と考えられ、この状態に於いても
完全に分離するということはこのマイラー分離機構がい
かに信頼性があるかを証明している。Considering the conditions in which a copying machine is actually used, the condition where no separation current is applied is considered to be the worst condition, and the fact that it is completely separated even under this condition proves how reliable this Mylar separation mechanism is. are doing.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は電子複写機の１１面図、第一図は第１図の一部
拡大図、第３図は本発明の実施例の斜視図、第一図は第
３図の側面図、第Ｓ図乃至第７図は本発明の作用を示す
１ＩＩＥＴ１図、第１図は本発明の他の実施例の斜視図
である。 １０・・転写紙　ｌ／・・転写電極　／２・・分離電極
　１３・・吹出部　ｌゲ・・後部搬送部　−一・・吹出
口　コ３・・支持板　コク・・主マイラー　コよ・・取
付板　２番・・副マイラー　コク・・取付板　コｔ・・
小マイラー〇 特許出願人　コピア株式会社 代理人　新　井　−部 第１図 ３ 第２図 第３図 第４図 ８ 第５図FIG. 1 is an 11th view of the electronic copying machine, FIG. 1 is a partially enlarged view of FIG. 1, FIG. 3 is a perspective view of an embodiment of the present invention, FIG. 1 is a side view of FIG. FIGS. S to 7 are diagrams showing the operation of the present invention, and FIG. 1 is a perspective view of another embodiment of the present invention. 10...Transfer paper l/...Transfer electrode /2...Separation electrode 13...Blowout part Lge...Rear conveyance part -1...Blowout outlet C3...Support plate Body...Main mylar Koyo... Mounting plate No. 2... Sub-Mylar Koku... Mounting plate Kot...
Small Mylar Patent Applicant Copia Co., Ltd. Agent Arai - Department Figure 1 Figure 3 Figure 2 Figure 3 Figure 4 Figure 8 Figure 5

Claims (1)

【特許請求の範囲】[Claims] ｉ　電子複写機の感光体ドラム周囲に配された転写部位
に続いて感光体表面より複写紙を引離す分離電極を感光
体に相対して配し、分離電極に続いて感光体表面と複写
紙端間にエアーを吹込むエアー吹出部を感光体に相対し
て設け、該エアー吹出部は吹出口が感光体ドラムの軸方
向に細長いスリット状をなして箱形の吹出口部をなした
ものにおいて、吹出口下面とほぼ同一平面となるよう曇
こ吹出口側方に吹出部と並列するように感光体ドラムに
先端が接する主マイラー板を配して吹出部に支持し、吹
出口上面に感光ドラムに先端が接する副マイラー板を吹
出口上縁と同一平面となるように配して吹出口上面に固
定し、副マイラー先熾と吹出口下縁に副マイラーに向っ
て凸に湾曲した細幅の小マイラー板の両端を固定してな
る電子複写機に於けるマイラー分離機構。i.Following the transfer area arranged around the photoreceptor drum of an electronic copying machine, a separation electrode for separating the copy paper from the photoreceptor surface is arranged facing the photoreceptor, and following the separation electrode, the separation electrode separates the copy paper from the photoreceptor surface. An air blowing part for blowing air between the ends is provided facing the photoreceptor, and the air blowing part has a box-shaped blowing outlet with an elongated slit in the axial direction of the photosensitive drum. In this case, the main Mylar plate, whose tip is in contact with the photoreceptor drum, is placed on the side of the cloudy air outlet and parallel to the air outlet so that it is almost on the same plane as the lower surface of the air outlet, and is supported by the air outlet. A secondary Mylar plate whose tip touches the photosensitive drum is arranged so as to be flush with the upper edge of the air outlet and fixed to the upper surface of the air outlet, and the tip of the secondary Mylar plate and the lower edge of the air outlet are curved convexly toward the secondary Mylar. Mylar separation mechanism in electronic copying machines, which is made by fixing both ends of a small narrow Mylar plate.