JPS6017776A - Sheet separating device - Google Patents
Sheet separating deviceInfo
- Publication number
- JPS6017776A JPS6017776A JP12638083A JP12638083A JPS6017776A JP S6017776 A JPS6017776 A JP S6017776A JP 12638083 A JP12638083 A JP 12638083A JP 12638083 A JP12638083 A JP 12638083A JP S6017776 A JPS6017776 A JP S6017776A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- roller
- separating
- separation
- belt
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6532—Removing a copy sheet form a xerographic drum, band or plate
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は複写機の転写後のシートの分離装置に関し、特
に、分離ベルトと分離ローラと偏向ローラとを備えたシ
ート分離装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a sheet separating device for a copying machine after transfer, and more particularly to a sheet separating device including a separating belt, a separating roller, and a deflecting roller.
従来技術
感光体の一端aK沿って細長いベルト状の分離体を配置
してシートの側縁がその上を移動するようにし、これK
よりシートを分離するようにしたシート分離装置Fi、
特開昭Sθ−コ9θダダ号公報等により知られている。Prior Art An elongated belt-like separator is arranged along one end aK of the photoreceptor so that the side edge of the sheet moves over it, and this
A sheet separating device Fi that separates sheets more easily;
This is known from Japanese Patent Application Laid-Open No. Sho Sθ-K9θ Dada.
このシート分離装置itは、静電分離や空圧分離等を不
要にするので好ましいものであるが分離時の剥離力が弱
いと言う欠点があった@
特開昭!f;/−Kgコ33号公報は感光体の側縁に沿
って分離ベルトを設けるとともに、ベルト上のシートに
強い剥離力を与える分離ローラと、分離後のシートの姿
勢を鎖側する偏向ローラを備えたシート分離装置を開示
している。このシート分離装置は十分な剥離力を有する
ので好ましいものであるが、剥離力が分離ロールのある
側とない側とでは異なるため、転与領域において、僅か
ではあるが速度差が生じ、転写後の像が歪む欠点があっ
た。This sheet separation device IT is preferable because it eliminates the need for electrostatic separation or pneumatic separation, but it has the drawback that the peeling force during separation is weak @ JP-A-Sho! f;/-Kgko No. 33 provides a separation belt along the side edge of the photoconductor, and also includes a separation roller that applies a strong peeling force to the sheet on the belt, and a deflection roller that changes the posture of the sheet after separation. A sheet separating device is disclosed. This sheet separation device is preferable because it has sufficient peeling force, but since the peeling force is different between the side with the separation roll and the side without the separation roll, there is a slight speed difference in the transfer area, which causes problems after transfer. The problem was that the image was distorted.
かかる問題点について、上記公報所載のものではないが
既に提案されている装置を示す第1図ないし第3図を用
いて説明する。感光体1の転写領域には転写コロナ放電
器2が設けられており、この転写領域でシート8が感光
体1に接触するように送られ、転写後のシート8はシー
ト分離装置4によシ分離されて案内板5に送られ、定着
処理される。シート分離装置4は、感光体1の一端縁に
沿ってシート8の側縁がその上を移動するように配置さ
れた分離ベルト6と、ベルト上のシート8の側縁に接触
し、シート8を感光体lから分離するように回転する分
離ローラ7と、このローラ7に共軸的に並置されて該ロ
ーラとともに回転し。These problems will be explained with reference to FIGS. 1 to 3, which show devices that have already been proposed but are not included in the above-mentioned publication. A transfer corona discharger 2 is provided in the transfer area of the photoreceptor 1, and the sheet 8 is fed so as to come into contact with the photoreceptor 1 in this transfer area, and the sheet 8 after transfer is transferred to the sheet separation device 4. It is separated and sent to the guide plate 5, where it is fixed. The sheet separating device 4 contacts a separating belt 6 arranged so that the side edge of the sheet 8 moves along one end edge of the photoconductor 1 and the side edge of the sheet 8 on the belt, and separates the sheet 8 from the separating belt 6 . A separating roller 7 rotates to separate the photoreceptor 1 from the photoreceptor 1, and a separating roller 7 is placed coaxially in parallel with this roller 7 and rotates together with the roller.
他のシート部分の姿勢を規制する偏向ロー28とを備え
ており、分離ローラ7にはピンローラ9が対向配置され
、ま迄ベルト6を分離ローラ7に圧接するように偏向す
るガイドピン10が設けられている。A pin roller 9 is arranged opposite to the separation roller 7, and a guide pin 10 is provided to deflect the belt 6 so as to press it against the separation roller 7. It is being
かかるシート分離装置を用いてシート3を分離する様子
が第2図に示されている。かかる図からも分るように、
分)雅ローラフによって分離されたシート8は分離ロー
ラ7側の端部ではシートが先に進んで分離ローラフに沿
って進められているが1分離ローラ7から離れるに従っ
てシートの剥離力が減少し、僅かではあるがシートの進
み速度が遅れ、その先端が実線で示すように立上ってし
まう。FIG. 2 shows how sheets 3 are separated using such a sheet separating device. As can be seen from this figure,
) The sheet 8 separated by the Miyabi roller ruff is advanced at the end on the separation roller 7 side and is advanced along the separation roller ruff, but as it moves away from the separation roller 7, the peeling force of the sheet decreases. The advancing speed of the sheet is delayed, albeit slightly, and the leading edge of the sheet rises as shown by the solid line.
勿論更にシートを進めれば、a点鎖線で示すようにシー
トは・偏向ロール8に沿って進められるようになるが、
シートの先端が立上っている間は、シートがずれること
になり、転写領域において転写ずれを生じ像が歪んでし
まう。この像の歪みは、第3図に示すように、両ローラ
の直径a、bが同じであシ、關ロー28からは十分な送
り力が得られず分離ローラの送り速度より僅かに遅れる
ため士あるが、その原因は、分離ベルト側のシート側縁
と反対側のシート側線とではシートの剥離点が異たるこ
とと、シートを速やかに案内板に沿わせる手段がないこ
ととKよるものと考えられる@かかる欠点をなくするた
め、分離ベルトによる用紙への接触幅を大きくしたもの
もあるが、感光体の有効幅が狭くなったり、あるいは感
光体の有効幅を広けると装置が大形化する等の欠点があ
る〇これとは別に、シートの分離の際の偏向角を小さく
したものもあるが、このためにシート給送路の九めの占
有空間が大きくなり、装置を大形化させてしまう欠点が
ある@
発明の目的
従って、本発明の目的は、装置を大形化させたり、感光
体の有効幅を狭くしたりすることなく、像歪みを生じさ
せないシート分離装置を提供することにある@
発明の構成
かかる目的を達成する友め、本発明によるシート分離装
置は、分離四−ラから離れた側の分離ローラの夕立くと
も一部が、分離ローラより大きが直径にされている。Of course, if the sheet is advanced further, the sheet will be able to advance along the deflection roll 8 as shown by the dashed line a.
While the leading edge of the sheet is rising, the sheet is displaced, causing transfer displacement in the transfer area and distorting the image. This image distortion is caused by the fact that the diameters a and b of both rollers are the same as shown in Figure 3, and the feed force from the roller 28 is not sufficient and the feed speed is slightly slower than that of the separation roller. However, the cause of this is that the separation point of the sheet is different between the sheet side edge on the separation belt side and the sheet side line on the opposite side, and there is no means to quickly make the sheet follow the guide plate. In order to eliminate this drawback, some systems have increased the contact width of the separation belt with the paper, but if the effective width of the photoreceptor becomes narrower, or if the effective width of the photoreceptor is widened, the device becomes larger. Separately, there are also methods that reduce the deflection angle when separating sheets, but this increases the space occupied by the sheet feeding path and makes the device larger. Therefore, an object of the present invention is to provide a sheet separation device that does not cause image distortion without increasing the size of the device or narrowing the effective width of the photoreceptor. SUMMARY OF THE INVENTION To achieve the above object, a sheet separating device according to the present invention provides a sheet separating device in which at least a part of the separating roller on the side remote from the separating roller has a diameter larger than that of the separating roller. is being used.
実施例
以下本発明の実施例について図面を参照しながら説明す
る。第9図は本発明による実施例を示すものであるが、
説明の便宜上程々の部材が省略されている。す力わち、
第1図及び第2図に示すように、本発明によるシート分
離装置は、基本的には分離ローラ7と、偏向ローラ8と
、分離ベルト6とを備えたものであり、またピンチロー
ラ9及びガイドピン10を付加的に備えている。EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings. FIG. 9 shows an embodiment according to the present invention,
For convenience of explanation, some members are omitted. I am strong,
As shown in FIGS. 1 and 2, the sheet separating device according to the present invention basically includes a separating roller 7, a deflecting roller 8, and a separating belt 6, and also includes a pinch roller 9 and a separating belt 6. A guide pin 10 is additionally provided.
本発明の一実施例において、偏向ローラ8は、分離ロー
ラフから遠ざかるにつれて、その直径が大きくなるよう
に形成されている。すなわち、゛偏向ローラ8の、分離
ローラ側の直径すは分離ローラ7の直径arc等しいが
反対側の直径Cは分離ローラの直径8よりも大きくされ
ている。@5図は他の形状の偏向ローラ8を示しており
、この例では分離ローラ7と反対側の端部を含む一部が
直径Cとして分離ローラ7の直径aよシ大きくされてい
る。また、この偏向覧−ラ8の直径の増加の程度が小さ
い場合には、第S図の想像線で示すように、偏向ローラ
8全体を大きくしてもよい。In one embodiment of the invention, the deflecting roller 8 is formed such that its diameter increases as it moves away from the separating roller ruff. That is, the diameter of the deflection roller 8 on the separation roller side is equal to the diameter arc of the separation roller 7, but the diameter C on the opposite side is larger than the diameter 8 of the separation roller. Figure @5 shows a deflection roller 8 having another shape, and in this example, a portion including the end opposite to the separation roller 7 has a diameter C, which is larger than the diameter a of the separation roller 7. Further, if the degree of increase in the diameter of the deflection roller 8 is small, the deflection roller 8 as a whole may be enlarged as shown by the imaginary line in FIG.
かかる偏向ローラを用いてシートを分離する場合tシー
ト8が仮に第Ω図に示すように立上った状態で搬送され
ても、シートの立上シの大きい部分の偏向ローラすなわ
ち分離ローラ7とは反対側の偏向ローラ8の部分も大き
な曲率をもって立上っているためシートは偏向ローラと
その接触を維持し、従ってシート8は全体としてそのま
ま案内板5Vc沿うように送られる。しかも、第S図に
おいて理解されるように、分離ロー27と感光体lとの
隙間に比較し、偏向ローラ8と感光体1との隙間の方が
小さいために、シート8は分離ローラ7側の側縁よりも
偏向ローラ8の大径部において早い時期に剥離力を受け
てシートが感光体から分離され始め、これによりシート
の案内板5への押えが分離ベルト側の側縁よりも早く行
える。更に、偏向ローラの直径が分離ローラの直径よシ
も大きいため、偏向ローラの表面速度が速くなり、シー
トは速やかに第2図の二点鎖線で示す状態になる。When separating sheets using such a deflecting roller, even if the sheet 8 is conveyed in an upright state as shown in FIG. Since the portion of the deflection roller 8 on the opposite side also rises with a large curvature, the sheet maintains contact with the deflection roller, and therefore the sheet 8 as a whole is fed as it is along the guide plate 5Vc. Moreover, as can be seen in FIG. The sheet begins to be separated from the photoreceptor due to the peeling force applied earlier at the large diameter portion of the deflection roller 8 than at the side edge of the deflection belt, and as a result, the sheet is pressed against the guide plate 5 earlier than at the side edge on the separation belt side. I can do it. Furthermore, since the diameter of the deflection roller is larger than the diameter of the separation roller, the surface speed of the deflection roller increases, and the sheet quickly reaches the state shown by the two-dot chain line in FIG.
従って、シート上に転写された後はその歪みが実質上な
くなることが分る。Therefore, it can be seen that the distortion is substantially eliminated after the image is transferred onto the sheet.
発明の効果
本発明によれば、分離ベルトの幅を犬きくしたシ、シー
トの偏向角を小さく規制したりすることなく一転写時の
像歪みを生じさせずにシートを分離させることがで肯、
その構造は極めて簡単外ものであるため装置の価格を上
けることがカく、転写後のシートの姿勢が適正に保たれ
ることから転写後のシートの走行姿勢を適正にし、定着
器等でシワを生じたりすることもない。Effects of the Invention According to the present invention, it is possible to separate sheets without causing image distortion during one transfer without increasing the width of the separation belt or regulating the deflection angle of the sheet to be small. ,
Since the structure is extremely simple, it is difficult to increase the price of the device, and since the posture of the sheet after transfer is maintained properly, the running posture of the sheet after transfer is appropriate, and the fuser etc. It does not cause wrinkles.
給/図は従来のシート分離装置の側面図、第2図は従来
のシート分離装置の斜視図、第3図は分離ローラ及び偏
向ローラと感光体との関係を示す平面図、第グ図は本発
明の一実施例によるシート分離装置の斜視図、第3図は
本発明による他の偏向ローラ形状を示す、第3図と同様
の平面図である。
l・・・感光体、2・・・転写コロナ放電器、8・・・
シート、6・・・分離ベルト、?・・・分離ローラ、8
・・・偏向ローラ% 9・・・ピンチローラ。Figure 2 is a side view of a conventional sheet separation device, Figure 2 is a perspective view of a conventional sheet separation device, Figure 3 is a plan view showing the relationship between the separation roller, deflection roller, and photoreceptor, and Figure 3 is a side view of a conventional sheet separation device. FIG. 3 is a perspective view of a sheet separating device according to an embodiment of the present invention, and FIG. 3 is a plan view similar to FIG. 3 showing another deflection roller shape according to the present invention. l...Photoreceptor, 2...Transfer corona discharger, 8...
Seat, 6...separation belt,? ...Separation roller, 8
... Deflection roller % 9 ... Pinch roller.
Claims (1)
縁に沿ってシートがその上を移動するように配置された
分離ベルトと、該ベルト上のシートの側線に接触しシー
トを感光体から分離するように回転する分離ローラと、
この分離ローラと共軸に並置され該分熱ローラ以外の部
分のシートの姿勢を規制する偏向ローラとから成るシー
ト分離装置において、前記偏向ローラの、分離ローラか
ら離れた少なくとも一部が分離ローラより大きな直径に
形成されていることを特徴とするシート分離装置。To separate the sheets downstream of the transfer area, a separation belt is provided along one edge of the photoreceptor so that the sheet moves over it, and a separation belt that contacts the side line of the sheet on the belt to remove the sheet from the photoreceptor. a separation roller that rotates to separate the
In a sheet separating device comprising a deflecting roller coaxially arranged in parallel with the separating roller and regulating the posture of the sheet in a portion other than the heat dividing roller, at least a portion of the deflecting roller away from the separating roller is arranged in parallel with the separating roller. A sheet separating device characterized by being formed with a large diameter.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12638083A JPS6017776A (en) | 1983-07-12 | 1983-07-12 | Sheet separating device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12638083A JPS6017776A (en) | 1983-07-12 | 1983-07-12 | Sheet separating device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6017776A true JPS6017776A (en) | 1985-01-29 |
JPH0477312B2 JPH0477312B2 (en) | 1992-12-08 |
Family
ID=14933719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12638083A Granted JPS6017776A (en) | 1983-07-12 | 1983-07-12 | Sheet separating device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6017776A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10370209B2 (en) * | 2017-03-24 | 2019-08-06 | Fuji Xerox Co., Ltd. | Recording medium processing device and image forming apparatus |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS557951U (en) * | 1978-06-30 | 1980-01-19 | ||
JPS55141140U (en) * | 1979-03-30 | 1980-10-08 | ||
JPS57164768U (en) * | 1981-04-14 | 1982-10-18 |
-
1983
- 1983-07-12 JP JP12638083A patent/JPS6017776A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS557951U (en) * | 1978-06-30 | 1980-01-19 | ||
JPS55141140U (en) * | 1979-03-30 | 1980-10-08 | ||
JPS57164768U (en) * | 1981-04-14 | 1982-10-18 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10370209B2 (en) * | 2017-03-24 | 2019-08-06 | Fuji Xerox Co., Ltd. | Recording medium processing device and image forming apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPH0477312B2 (en) | 1992-12-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4591259A (en) | Tri-pass baffle decurler | |
US5555083A (en) | Decurler apparatus for reducing cross curl in sheets | |
US4632533A (en) | Off-set nip roll decurler | |
US5123895A (en) | Passive, intelligent, sheet decurling system | |
US5967507A (en) | Automatic document handler having non-relative motion vacuum corrugating device | |
US5211388A (en) | Retard roll enhancement | |
JPS6017776A (en) | Sheet separating device | |
EP0197722B1 (en) | Sheet decurling apparatus | |
US5231457A (en) | Method and apparatus for preventing attraction of a work sheet to a toner image forming surface | |
JPH0295668A (en) | Image forming device | |
JPS59119373A (en) | Transferring device | |
JP2536550B2 (en) | Static eliminator of electrostatic copier | |
JPS59108641A (en) | Sheet curl straightening device | |
JP3674247B2 (en) | Image forming apparatus | |
US4508334A (en) | System for separating transfer-printing sheet | |
JP3826459B2 (en) | Image forming apparatus | |
JPS60200273A (en) | Separating and conveying device for transfer paper | |
JPS6293154A (en) | Transfer paper guide in electrophotographic copying machine | |
JPH0527608A (en) | Form feeder for image transfer device | |
JPH0554455U (en) | Image forming device | |
JPH0712362Y2 (en) | Sheet feeding device for transfer area of image forming apparatus | |
JP3041460B2 (en) | Image forming device | |
JPH06266256A (en) | Thermal fixing device | |
JPH04172373A (en) | Pre-transfer guide device | |
JPH03179378A (en) | Electrophotographic copying device |