JPS5934571A - Picture forming device - Google Patents

Picture forming device

Info

Publication number
JPS5934571A
JPS5934571A JP14581182A JP14581182A JPS5934571A JP S5934571 A JPS5934571 A JP S5934571A JP 14581182 A JP14581182 A JP 14581182A JP 14581182 A JP14581182 A JP 14581182A JP S5934571 A JPS5934571 A JP S5934571A
Authority
JP
Japan
Prior art keywords
guide
paper
roller
separation
transfer material
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
Application number
JP14581182A
Other languages
Japanese (ja)
Inventor
Fumio Nishino
西野　文夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP14581182A priority Critical patent/JPS5934571A/en
Publication of JPS5934571A publication Critical patent/JPS5934571A/en
Pending legal-status Critical Current

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
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/163—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap
    • G03G15/1635—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap the field being produced by laying down an electrostatic charge behind the base or the recording member, e.g. by a corona device
    • G03G15/165—Arrangements for supporting or transporting the second base in the transfer area, e.g. guides

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Registering Or Overturning Sheets (AREA)

Abstract

PURPOSE:To prevent an error of separation securely even when a narrow separating member is used or when a transferring material is floppy, by providing a slanting feed means for conveying the tranferring material in a guide direction at the side end part of a conveyance path for the transferring material and a transferring material passing detecting means between a guide and a slanting feed roll. CONSTITUTION:The transferring paper P mounted on a manual insertion guide 13 is moved between the 1st upper guide A and lower guide B to pass between the slanting feed roll 23 and a presser roll 24 freely, and when its leading end presses up a paper feed detection lever 29, a detection signal is generated to turn on a copying machine, and a platen starts moving; while the slanting feed roll 23 starts rotating, a plunger 27 is turned on and an actuator 27a leaves the end part of a hole 25a and the presser roll 24 is lowered on the transferring paper P. The transferring paper P receives conveying force slantingly by the slanting feed roll 23 and presser roll 24 and its right end part abuts on a width guide before passing through a separation belt; and its is sent along the width guide on the basis of the relation of the moment of force and caught by the separation belt without fail, so the paper is separated from a drum 2 securely.

Description

【発明の詳細な説明】 本発明は、複写機あるいは記録機等の画像形成装置に関
するものである。より詳しくは、像担持体上の像を転写
材へ転写後、該転写材を感光ドラム等の像担持体から機
械的に分離する画像形成装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image forming apparatus such as a copying machine or a recording machine. More specifically, the present invention relates to an image forming apparatus that, after transferring an image on an image carrier to a transfer material, mechanically separates the transfer material from an image carrier such as a photosensitive drum.

以下、手差し給紙可能な電子写真複写機を例にあげて説
明する。Hereinafter, an electrophotographic copying machine that can manually feed paper will be described as an example.

写 従来、電子写真夜光機に用いられている転写材の分離方
式には、ベルト状や紐状の分離部材を感光ドラムの端部
付近に当接もしくは近接させて配置させるものがある。BACKGROUND ART Conventionally, there is a transfer material separation method used in electrophotographic night luminaires in which a belt-like or string-like separation member is placed in contact with or close to an end of a photosensitive drum.

この方式では、転写材は転写時にドラムと密着するが、
その端部は分離部材に掛っているので、送られるに従っ
てドラムから離れる方向へ案内されて剥離される。従っ
て、転写材の幅方向の位置が分離部材に掛かる位置に揃
っていないと、転写材はドラムに密着したまま剥離され
ず紙詰りを生じてしまう。In this method, the transfer material comes into close contact with the drum during transfer, but
Since its end is hooked on the separation member, as it is fed, it is guided away from the drum and peeled off. Therefore, if the widthwise position of the transfer material is not aligned with the separation member, the transfer material will remain in close contact with the drum and will not be peeled off, resulting in a paper jam.

そこで従来は、転写材の端部を検知して、所定めていた
。例えば、実公昭５７−１９７１１号公報明細書に開示
されている様に、分離部材としての分離ベルトの延長線
上に位置する給紙路の中途部に検山部を設け、ベルトか
ら外れる位置に転写材が挿入されても複写機が作動しな
いようにしていた。Therefore, in the past, the end of the transfer material was detected and determined. For example, as disclosed in the specification of Japanese Utility Model Publication No. 57-19711, a detection part is provided in the middle of the paper feed path located on the extension line of the separation belt as a separation member, and the paper is transferred to a position away from the belt. The copier was prevented from operating even if material was inserted.

この場合、操作者は転写材を幅方向の位置合わせをする
ガイドにきちんと揃えて確実に突き当てながら複写機本
体内に挿入せねばならない。また、分離ベルトの幅が狭
い場合には、その延長線上にベルトを配置することがで
きない場合があり、この場合には分離ミスを確実に未然
に防止できない恐れが考えられる。あるいは、分離ベル
トが転写材の搬送径路端部に設けられ、その延長線上に
検出部を配置すると、検出部としてアクチュエータ等を
用いた場合、転写材はその側端部でアクチュエータを押
し上げねばならず、転写材のこしの弱い場合には、アク
チュエータを押し上げることができず、検知を確実に行
うことができないことが考えられる。In this case, the operator must insert the transfer material into the main body of the copying machine while properly aligning the transfer material with the guide for positioning in the width direction and making sure to abut it. Further, if the width of the separation belt is narrow, it may not be possible to arrange the belt on its extension line, and in this case, there is a possibility that separation errors cannot be reliably prevented. Alternatively, if the separation belt is provided at the end of the conveyance path of the transfer material and the detection section is placed on the extension line, if an actuator or the like is used as the detection section, the transfer material must push up the actuator at its side end. If the stiffness of the transfer material is weak, the actuator cannot be pushed up, and detection may not be performed reliably.

そこで本発明は、上述従来例の問題点を解消して、たと
え幅の狭い分離部材を用いたとしても、あるいは転写材
のこしが弱い場合でも、分離ミスを確実に未然に防止で
きる画像形成装置を提供するものである。Therefore, the present invention solves the above-mentioned problems of the prior art and provides an image forming apparatus that can reliably prevent separation mistakes even if a narrow separation member is used or the transfer material is not stiff enough. This is what we provide.

即ち上記目的を達成する本発明は、像担持体へ転写材を
搬送し該転写材へ像を転写後、転写材を像担持体から分
離する画像形成装置において、転写材の搬送径路側端部
に設けられたガイド、該ガイド方向へ転写材を搬送する
斜送手段と、像担持体から転写材を分離するため、上記
ガイドと斜送ローラとの間に設けられた転写材通過検知
手段とを有することを特徴とするものである。That is, the present invention achieves the above object in an image forming apparatus that transports a transfer material to an image carrier and separates the transfer material from the image carrier after transferring an image to the image carrier. a guide provided in the guide, a diagonal feeding means for conveying the transfer material in the direction of the guide, and a transfer material passage detecting device provided between the guide and the diagonal feeding roller to separate the transfer material from the image carrier. It is characterized by having the following.

以下、本発明の一実施例を図面を用いて詳細に説明する
。Hereinafter, one embodiment of the present invention will be described in detail using the drawings.

まず、本発明の一実施例を適用した電子写真複写機につ
いて説明する。First, an electrophotographic copying machine to which an embodiment of the present invention is applied will be described.

第１図は、本発明の一実施例を適用した電子写真複写機
の断面図である。FIG. 1 is a sectional view of an electrophotographic copying machine to which an embodiment of the present invention is applied.

図において、導電性ドラム基体上に光導電層１を設けた
感光ドラム２が、矢印ａ方向に回転可能に軸支されてい
る。このドラム２の周囲にはドラム２の回転方向に従っ
て、コロナ放電器３．短焦点光学素子アレイ４．現像器
５．転写コロナ放電器６．クリーニング器７が配設され
ている。In the figure, a photosensitive drum 2 having a photoconductive layer 1 provided on a conductive drum base is rotatably supported in the direction of arrow a. Around this drum 2, corona dischargers 3. Short focus optical element array4. Developer 5. Transfer corona discharger6. A cleaning device 7 is provided.

上記複写機においては、まずコロナ放電器６で感光ドラ
ム２の表面を所定極性で均一に帯電し、次いで装置本体
上部の往復移動する（矢示す方向）原稿台１０上の原稿
０をハロゲンランプ１１で照明し、反射光を短焦点結像
素子アレイ４を介してドラム２上に露光して潜像を形成
する。次いで、この静電潜像は現像器５により顕画化さ
れる。そしてドラム２上に形成されたトナー像は、手差
し送られた転写紙Ｐ上に、転写帯電器６からの一次帯電
器３と同極性のコロナによって転写される。In the copying machine described above, first, the surface of the photosensitive drum 2 is uniformly charged with a predetermined polarity using the corona discharger 6, and then the document 0 on the document table 10 that moves back and forth (in the direction indicated by the arrow) at the top of the main body of the device is charged using the halogen lamp 11. The drum 2 is exposed to the reflected light through the short-focus imaging element array 4 to form a latent image. Next, this electrostatic latent image is developed by a developing device 5. The toner image formed on the drum 2 is transferred onto the manually fed transfer paper P by a corona having the same polarity as the primary charger 3 from the transfer charger 6.

次いでトナー像を転写された転写紙Ｐは、転写紙搬送径
路端部に配置された帯状の分離ベルト１４また分離ロー
ラ１５及び従動ローラ１５ａにより感光ドラム２より分
離され、搬送部１６により定着器１７に送られる。なお
ここで分離ベルト１４は、転写時にドラム２と転写紙Ｐ
の側端部との間に位置して、転写時にドラム２と密着す
る転写紙Ｐの側端部をドラム２から離隔しており、ドラ
ム２上のトナー像が転写された転写紙Ｐをその進行とと
もにドラム２から離れる方向へ導くものであり、ドラム
２から離れる方向へ導かれた転写紙Ｐは、その後駆動回
転する分離ローラ１５及びそれに従動回転するローラ１
５ａＫ挟持搬送されてドラム２周面上から引き剥される
。なお１４ｂは−（ネで、分離ベルトを張設してベルト
の一部をドラム２の側端部に圧接するものである。Next, the transfer paper P on which the toner image has been transferred is separated from the photosensitive drum 2 by a strip-shaped separation belt 14 disposed at the end of the transfer paper transport path, a separation roller 15, and a driven roller 15a, and then transferred to a fixing device 17 by a transport section 16. sent to. Note that the separation belt 14 separates the drum 2 and the transfer paper P during transfer.
The side edge of the transfer paper P that comes into close contact with the drum 2 during transfer is separated from the drum 2, and the side edge of the transfer paper P, on which the toner image on the drum 2 has been transferred, is separated from the drum 2. The transfer paper P is guided in the direction away from the drum 2 as it advances, and the transfer paper P guided in the direction away from the drum 2 is then driven to rotate by the separation roller 15 and the roller 1 to be rotated by it.
5aK is pinched and conveyed and is peeled off from the circumferential surface of the drum 2. Note that 14b is -(ne), and a separation belt is stretched and a part of the belt is pressed against the side end portion of the drum 2.

そしてドラム２上より分離された転写紙Ｐは、定着器１
７により、像を定着された後排紙トレイ１８に入り最終
コピーとなる。Then, the transfer paper P separated from the drum 2 is transferred to the fixing device 1.
7, after the image is fixed, the paper enters the discharge tray 18 and becomes the final copy.

なお転写終了後の感光ドラム２は、クリーナー７により
残余トナーを除去された後に、像露光光源であるハロゲ
ンランプ１１１Ｃよる光を一部分割して反射＊１９によ
り感光ドラム２面上に導いた前露光（図中、二点鎖線ｄ
）＆Ｃより電位的に均一化され、−次帯電器３へと進む
。そして多数枚コピーの場合上記動作を繰り返す。ここ
で２０は排熱ファン、２１は熱線吸収フィルター等のフ
ィルターである。After the photosensitive drum 2 has been transferred, the remaining toner is removed by the cleaner 7, and then the light from the halogen lamp 111C, which is the image exposure light source, is partially divided and guided onto the surface of the photosensitive drum 2 by reflection*19. (In the figure, two-dot chain line d
)&C, the potential is made uniform, and the charger advances to the -order charger 3. In the case of multiple copies, the above operation is repeated. Here, 20 is a heat exhaust fan, and 21 is a filter such as a heat ray absorption filter.

さて次に、手差し台１３からの転写紙Ｐの給送について
詳述する。Next, the feeding of the transfer paper P from the manual feed table 13 will be described in detail.

第２図は手差し給紙口Ｆの上部平面図、第３図はその下
部平面図である。FIG. 2 is a top plan view of the manual paper feed port F, and FIG. 3 is a bottom plan view thereof.

図中、手差し給紙口Ｆには、転写紙Ｐを挿入し易くする
為の手差しガイド１６が設けられており、さらに幅方向
の基準ライン■（一点鎖線で図示）に沿って幅ガイド１
３ａが設けられている。なお、この幅ガイド１３ａは、
搬送径路の下側に設けられた下ガイドＢの側端部に固設
されている。そして、手差しガイド１６上を幅ガイド１
３．ａに略涜って手差し挿入された転写紙Ｐは、給紙口
Ｆから第１上ガイドＡ及び下ガイドＢの間を通って本体
Ｃ内へ進んでいくと、転写紙Ｐを幅ガイド１３ａに確実
に沿わせる為に斜送ローラ２６が、転写紙Ｐの進行方向
に対してθだけ傾いて配設されている。この斜送ローラ
２３はゴム等の弾性体（材質的には静・動摩擦係数の差
の少ないものが望ましい）からなり、ギアトレイン６６
によって駆動される。また設置傾き角度θは、約１５°
〜６０°程度で転写紙の材質や斜送ローラ２ろの材質等
によつ斜送ローラには東新ゴム化学（株）製の「ノスラ
ン」（登録商標）を用いた際、［２Ｏ２位が最適であっ
た。またこの斜送ローラ２３の上方には、押えコロ２４
が基台２５上に回転自在に設置されている（第４図及び
第５図）。この基台２５は、軸２６を中心に揺動自在に
本体ＣＫ取り付けられている。In the figure, the manual paper feed slot F is provided with a manual feed guide 16 to make it easier to insert the transfer paper P, and furthermore, a width guide 16 is provided along the reference line (indicated by a dashed line) in the width direction.
3a is provided. Note that this width guide 13a is
It is fixed to the side end of the lower guide B provided below the conveyance path. Then, move the width guide 1 over the manual feed guide 16.
3. The transfer paper P, which has been manually inserted at point a, advances from the paper feed slot F into the main body C through between the first upper guide A and the lower guide B. In order to ensure that the transfer paper P is aligned with the transfer paper P, the oblique feed roller 26 is arranged to be inclined by θ with respect to the traveling direction of the transfer paper P. This oblique feed roller 23 is made of an elastic body such as rubber (preferably a material with a small difference in coefficient of static and dynamic friction), and the gear train 66
driven by. The installation tilt angle θ is approximately 15°.
~60 degrees, depending on the material of the transfer paper and the material of the second oblique feed roller. was the best. Further, above the oblique feed roller 23, a presser roller 24 is provided.
is rotatably installed on the base 25 (FIGS. 4 and 5). This base 25 is attached to the main body CK so as to be swingable about a shaft 26.

さらに基台２５の他端には、穴２５ａが設けられており
、プランジャー２７のアクチュエータ２７ａが貫通して
いる。このアクチュエータ２７ａは、支持枠２７ｂを中
心にして矢示ｅ−ｇ方向へ回動自在であり、通常バネ３
７の引っ張り力（第２図・矢示ｆ方向）によってｅ方向
（第２図）の回動力が与えられている。そこで通常この
アクチュエータ２７ａは、第４図に示す通り穴２５ａの
端部２５ｂを軸２６に対して反時計方向（矢示Ｃ方向）
に押しており、即ち基台２５はこのアクチュエータ２７
ａによって時計方向へ回動するのを規制され、斜送ロー
ラ２６と押えコロ２４は離れている。Furthermore, a hole 25a is provided at the other end of the base 25, through which an actuator 27a of the plunger 27 passes. This actuator 27a is rotatable in the direction of arrows e-g around the support frame 27b, and is normally supported by a spring 3.
A turning force in the e direction (Fig. 2) is applied by the tensile force of 7 (in the direction of arrow f in Fig. 2). Therefore, this actuator 27a is normally operated so that the end 25b of the through hole 25a shown in FIG.
That is, the base 25 is pressed against this actuator 27.
Clockwise rotation is restricted by a, and the oblique feed roller 26 and presser roller 24 are separated from each other.

次に後述する検知センサが転写紙Ｐが挿入されたことを
検知すると、その検知信号を受けてプランジャー２７が
ＯＮしてアクチュエータ２７ａを矢示ｇ方向へ引き付け
る。そこで、第５図に示す通り、アクチュエータ２７ａ
が穴２５ａの端部２５ｂから離れ、基台２５に固設され
た重り２８によって基台２５が時計方向（矢示ｄ方向）
に付勢され、押えコロ２４が下降し、ローラ２６に当接
する。そして転写紙Ｐは、押えコロ２４と検知信号を受
けて駆動を開始する斜送ローラ２６に挾持されて給送さ
れる。Next, when a detection sensor, which will be described later, detects that the transfer paper P has been inserted, the plunger 27 is turned on in response to the detection signal and draws the actuator 27a in the direction of arrow g. Therefore, as shown in FIG.
is separated from the end 25b of the hole 25a, and the base 25 is moved clockwise (in the direction of arrow d) by the weight 28 fixed to the base 25.
, the presser roller 24 descends and comes into contact with the roller 26 . The transfer paper P is then fed while being held between the presser roller 24 and the oblique feed roller 26, which starts driving in response to a detection signal.

ここで本実施例では、斜送ローラ２６の転写紙搬送方向
下流側で分離ベルト１４の上流側に、また斜送ローラ２
３と基準側端としての幅ガイド１３ａとの間に、手差し
された転写紙Ｐの通過を検知するための給紙検知レバー
２９が配置されている。より詳細には、斜送ローラ２６
と押えコロ２４の接線ｌよりも下流側で、検知レバー２
９が転写紙Ｐを検知してから斜送ローラ２３が転写紙Ｐ
が分離ベル）１４ａに到達する以前に転写紙Ｐの位置ず
れを修正して、転写紙Ｐの側端部が分離ベル）１４ａＫ
掛かり確実な分離を可能とする位置よりも上流側圧、ま
た接線ｌの反幅ガイド１３ａ側の幅端７１１１と幅ガイ
ド１３ａの内側端の基準ライン■との間に、即ち第３図
において一点鎖線［有］・■に挾まれた領域内に検知レ
バー２９が配置されている（第１図・第３図）。Here, in this embodiment, on the downstream side of the diagonal feed roller 26 in the transfer paper conveyance direction, and on the upstream side of the separation belt 14, and also on the diagonal feed roller 2
A paper feed detection lever 29 for detecting passage of the manually fed transfer paper P is arranged between the width guide 13a and the width guide 13a serving as the reference side end. More specifically, the oblique feed roller 26
On the downstream side of the tangent line l of the presser roller 24, the detection lever 2
9 detects the transfer paper P, and then the oblique feed roller 23 detects the transfer paper P.
The positional deviation of the transfer paper P is corrected before it reaches the separation bell) 14a, so that the side edge of the transfer paper P reaches the separation bell) 14aK.
The pressure is on the upstream side of the position that enables reliable separation, and between the width end 7111 on the side opposite to the width guide 13a of the tangent line 1 and the reference line (■) at the inner end of the width guide 13a, that is, the dashed-dotted line in FIG. [Yes] A detection lever 29 is arranged in the area sandwiched by (Fig. 1 and Fig. 3).

具体的に示すと、幅ガイド１３ａの内側端から約３　ｍ
ｍ離れた内側に分離ベルト１４ａ（幅約３ｍｍ）が設け
られている。そしてさらに、この分離ベルト１４ａの内
側端から約３ｍｍ離れた内側に検知レバー２９が配置さ
れている。また斜送ローラ２３は幅約１０　ｍｍ　、径
２１．６ｍｍφのゴムローラであり、搬送方向に対して
幅ガイド１３ａ側に約２０°傾いて設置されている。ま
たさらに、押えコロ２４は斜送ローラ２６とほぼ等しい
幅であり、径はそれよりも小さい。但し、押えコロ２４
の幅は斜送ローラ２６の幅と等しくなくても、それより
も小さくても良いことは勿論である。また分離ベルト１
４ａの先端１４ｂから７５ｍｍ上流に検知レバー２９は
配置されており、さらに斜送ローラ２６は先端１４ｂか
らその中心点２３ａまで約９５ｍｍ上流に配置されてい
る。Specifically, approximately 3 m from the inner end of the width guide 13a
A separation belt 14a (width: approximately 3 mm) is provided on the inner side at a distance of m. Further, a detection lever 29 is disposed inside the separation belt 14a at a distance of approximately 3 mm from the inner end thereof. The oblique feed roller 23 is a rubber roller having a width of about 10 mm and a diameter of 21.6 mm, and is installed at an angle of about 20 degrees toward the width guide 13a with respect to the conveying direction. Furthermore, the presser roller 24 has a width approximately equal to that of the oblique feed roller 26, and a diameter smaller than that. However, presser foot roller 24
Of course, the width of the skew roller 26 may not be equal to the width of the skew roller 26, but may be smaller than that. Separation belt 1
The detection lever 29 is disposed 75 mm upstream from the tip 14b of 4a, and the diagonal feed roller 26 is further disposed about 95 mm upstream from the tip 14b to its center point 23a.

なお本実施例では、第６図に示す通り斜送ローラの幅を
延長した領域内（点線■・■で示す）に、検知レバー２
９を配置している。これにより、検知レバー２９による
転写紙Ｐの通過検知と、ローラ２３・コロ２４による位
置ずれ修正とがより確実に行われることになるが、本発
明はこの構成に限定されるわけではなく、前述した配置
構成により十分な効果を得ることができるものである。In this embodiment, as shown in FIG. 6, the detection lever 2 is located within the area (indicated by dotted lines
9 is placed. This allows the detection lever 29 to detect the passage of the transfer paper P and the rollers 23 and 24 to correct the positional deviation more reliably, but the present invention is not limited to this configuration; With this arrangement, sufficient effects can be obtained.

さらにこの検知レバー２９の下流側には、感光ドラム２
上の画像と同期をとってＯＮ・ＯＦＦするプランジャー
４０により軸３０ａを中心にして上下方向へ回動して開
閉するシャッタ３０が設けられている。またシャッタ６
０のすぐ下流には搬送ローラ対３２・６３が設げられて
いる。またさらにその下流には、転写ガイド対６４・３
５が設けられている。なおＣは第２上ガイドである。Further, on the downstream side of this detection lever 29, a photosensitive drum 2
A shutter 30 is provided which opens and closes by rotating vertically about a shaft 30a by a plunger 40 which is turned on and off in synchronization with the above image. Also shutter 6
A pair of transport rollers 32 and 63 are provided immediately downstream of the transport roller 0. Further downstream, there is a pair of transfer guides 64 and 3.
5 is provided. Note that C is the second upper guide.

ここで第６図を用いて、検知レバー２９について詳述す
る。Here, the detection lever 29 will be explained in detail with reference to FIG.

この検知レバー２９は、その先端２９ａが第１上ガイド
Ａ及び下ガイドＢに設けられた開口Ａａ・Ｂａを貫通し
て待機している。そしてガイドＡ・８間を転写紙Ｐが進
行してくるとその通過により、Ｉ／バー２９は矢示ｉ方
向へ押し上げられる。するとその他端は、軸２９ｂを中
心にして矢示ｊ方向へ回動するので、連結棒２９ｃは矢
示に方向へ引っ張られる。すると作動レバー２９ｄが軸
２９ｅを中心にして矢示ｌ方向へ回動するので、フオッ
トセンサー２９ｆの光路から作動レバー２９ｄの先端２
９ｇが外れる。そこでフオットセンサー２９ｆは、転写
紙Ｐの通過を検知して検知信号を発する。The detection lever 29 is on standby with its tip 29a passing through openings Aa and Ba provided in the first upper guide A and the lower guide B. When the transfer paper P advances between the guides A and 8, the I/bar 29 is pushed up in the direction of the arrow i. Then, the other end rotates about the shaft 29b in the direction indicated by the arrow j, so that the connecting rod 29c is pulled in the direction indicated by the arrow. Then, the actuating lever 29d rotates in the direction of arrow l around the shaft 29e, so that the tip 2 of the actuating lever 29d is moved from the optical path of the foot sensor 29f.
9g comes off. Therefore, the foot sensor 29f detects the passage of the transfer paper P and issues a detection signal.

さて次に、転写紙手差し挿入動作について説明する。Next, the operation of manually inserting the transfer sheet will be explained.

当初、プランジャー２７はオフ状態でアクチュエータ２
７ａがバネ３７によって引っ張られて、基台２５の穴２
５Ｈ端部を規制しており、押えコロ２４は持ち上げられ
ているので、斜送ローラ２′５とコロ２４は離隔してい
る。Initially, the plunger 27 is in the off state and the actuator 2
7a is pulled by the spring 37, and the hole 2 of the base 25 is pulled.
5H end portion is restricted and the presser roller 24 is lifted, the oblique feed roller 2'5 and the roller 24 are separated from each other.

従って、手差しガイド１６上に載置された転写紙Ｐは、
操作者によって第１上ガイドＡ及び下ガイドＢの間を押
し進み、斜送ローラ２３及び押えコロ２４の間を自由圧
通過し、その先端が検知レバー２９に達する。そして転
写紙Ｐの先端が、給紙検知レバー２９を押し上げると、
前述した様に検知信号が発せられ、複写機がオンとなり
原稿台が移動を開始し、斜送ローラ２３が回転をはじめ
る。と同時にプランジャー２７がオンとなり、アクチュ
エータ２７ａが穴２５Ｈ端部から離れて押えコロ２４が
転写紙上に降りる。すると転写紙Ｐは、この斜送ローラ
２６と押えコロ２４とによって斜めに搬送力を得て、分
離ベルト１４ａを通過する以前に転写紙Ｐの右端部が幅
ガイド１３３に当接する。そこで力のモーメントの関係
で、転写１ｇＰは幅ガイド１３ａに瀘うように送られ、
その内側に設置された分離ベル）１４ａに必ず掛かるの
で、確実にドラム２からの分離が行われる。そしてシャ
ッタ３０に達すると、転写紙Ｐは先端が規Ｈされ一旦ス
トップする。このとき斜送り一う２６は、転写紙Ｐの裏
面をスリップしながら回転しつづけるが、プランジャー
２７がオフとなり押えコロ２４は持ち上げられる。そし
て感光ドラム２上の画像とレジストするようタイミング
をとってシャッタ６０が開放される直前にプランジャー
２７がオンとなって、押えコロ２４が再び下降し、次に
シャッタ６０が開放される。すると、転写紙Ｐは斜送ロ
ーラ２３と押えコロ２４とによって再び搬送力を得て搬
送ローラ対６２・６３に達して、次いでこのローラ対３
２・６３によって搬送力を得て転写ガイド対３４−３５
を経てドラムに送り込まれる。ドラム２の周面に到達し
た転写紙Ｐは、幅ガイド１３ａＫ？Ｅｊつた所定の搬送
径路を進行しているので、幅ガイド１３ａの内側に設置
された分離ベル）１４Ｈに必ず掛かり、ドラム２上のト
ナー像を転写された後このベル）１４ａによってドラム
２周面から離れる方向へ導かれた後、分離ローラ１５・
従動ローラ１５ａによってドラム２周面から引き剥され
、ドラム２周面から分離される。Therefore, the transfer paper P placed on the manual feed guide 16 is
It is pushed forward between the first upper guide A and the lower guide B by the operator, passes freely between the oblique feed roller 23 and the presser roller 24, and its tip reaches the detection lever 29. Then, when the leading edge of the transfer paper P pushes up the paper feed detection lever 29,
As described above, a detection signal is generated, the copying machine is turned on, the document table starts moving, and the oblique feed roller 23 starts rotating. At the same time, the plunger 27 is turned on, the actuator 27a moves away from the end of the hole 25H, and the presser roller 24 descends onto the transfer paper. Then, the transfer paper P receives a diagonal conveying force by the oblique feed roller 26 and the presser roller 24, and the right end of the transfer paper P comes into contact with the width guide 133 before passing through the separation belt 14a. Therefore, due to the moment of force, the transferred 1gP is sent to the width guide 13a,
Since it always hangs on the separation bell (14a) installed inside the drum 2, separation from the drum 2 is reliably performed. When the transfer paper P reaches the shutter 30, the leading edge of the transfer paper P is adjusted and temporarily stops. At this time, the oblique feeder 26 continues to rotate while slipping on the back side of the transfer paper P, but the plunger 27 is turned off and the presser roller 24 is lifted. Immediately before the shutter 60 is opened, the plunger 27 is turned on so as to register with the image on the photosensitive drum 2, the presser roller 24 is lowered again, and the shutter 60 is then opened. Then, the transfer paper P gains a conveyance force again by the oblique feed roller 23 and the presser roller 24 and reaches the conveyance roller pair 62 and 63, and then this roller pair 3
Transfer force is obtained by 2.63 and the transfer guide pair 34-35
After that, it is sent to the drum. The transfer paper P that has reached the circumferential surface of the drum 2 is guided by the width guide 13aK? As the toner image is being transferred along a predetermined conveyance path, it always catches the separation bell (14H) installed inside the width guide 13a, and after the toner image on the drum 2 is transferred, this bell (14a) transfers the toner image onto the drum 2 circumferential surface. After being guided away from the separating roller 15.
It is peeled off from the drum 2 circumferential surface by the driven roller 15a and separated from the drum 2 circumferential surface.

なお、転写紙Ｐが所定の搬送径路即ち斜送ローラ２６と
押えコロ２４とによって転写紙Ｐの位置ずれが修正可能
な径路内に挿入されなかった場合には、検知レバー２９
は作動することはなく、従って複写機はＯＮされず、斜
送ローラ２６も回転を始めることなく、押えコロ２４も
下降をすることなく、また複写機Ｃも画像形成動作を始
めることはない。Note that if the transfer paper P is not inserted into a predetermined conveyance path, that is, a path where the positional deviation of the transfer paper P can be corrected by the oblique feed roller 26 and the presser roller 24, the detection lever 29
is not operated, therefore, the copying machine is not turned on, the oblique feed roller 26 does not start rotating, the presser roller 24 does not descend, and the copying machine C does not start image forming operation.

また本実施例では、分離部材として分離ベルトを用いた
例を示したが、本発明はこれに限られるものではなく、
例えば分離爪あるいは空気吹き付は方式等を用いること
ができること勿論である。Furthermore, although this embodiment shows an example in which a separation belt is used as the separation member, the present invention is not limited to this.
For example, it is of course possible to use separation claws or air blowing methods.

また検知手段も、光学的あるいは機械的等いずれをも用
いることができる。また本発明は転写材の手差し挿入に
限られるものではなく、例えばカセット・デツキ等から
の転写材搬送にも適用できること勿論である。さらに転
写材としては、紙圧限らず例えばプラスチックシートも
用いることができる。また転写材に転写される像はトナ
ー像に限られるものではなく、磁気潜像あるいは静電潜
像等であっても良い。Further, as the detection means, either optical or mechanical means can be used. Furthermore, the present invention is not limited to manual insertion of the transfer material, but can of course be applied to conveyance of the transfer material from a cassette, deck, etc., for example. Further, the transfer material is not limited to paper pressure, and for example, a plastic sheet can also be used. Further, the image transferred to the transfer material is not limited to a toner image, but may be a magnetic latent image, an electrostatic latent image, or the like.

従って、本発明によれば、転写材を手差し挿入するもし
くは搬送する際、転写材を基準側端に沿わせることが自
動的に行われるので、これに関して操作者はさほど気を
使わなくて済む。また、検知手段が転写材の通過を検知
すれば、たとえ位置ずれして手差し挿入もしくは搬送さ
れている転写材でも、分離部材に到る以前に位置ずれが
修正されるので、分離が確実に行われ、分離ミスによる
ジャムを防止できる。また、本発明によれば光学的に限
らず、たとえばマイクロスイッチ等の機械的な検知手段
を用いたとしても、検知手段を転写材の側端部からかな
り内側（たとえば本実施例では約９ｍｍ）に配置するこ
とができるので、たとえ転写材のこしが弱い場合でも、
確実にアクチュエータを押し上げることができ、検知を
確実に行うことができる。Therefore, according to the present invention, when manually inserting or conveying the transfer material, the transfer material is automatically aligned along the reference side edge, so the operator does not have to pay much attention to this. Furthermore, if the detection means detects the passage of the transfer material, even if the transfer material is manually inserted or conveyed with a misalignment, the misalignment will be corrected before it reaches the separation member, ensuring separation. This prevents jams due to separation mistakes. Further, according to the present invention, even if a mechanical detection means such as a microswitch is used, the detection means is not limited to an optical one, but the detection means can be placed far inside from the side edge of the transfer material (for example, about 9 mm in this embodiment). Even if the transfer material is not stiff,
The actuator can be pushed up reliably and detection can be performed reliably.

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

第１図は本発明の一実施例を適用した複写機の断面図、
第２図は給紙部付近の上部平面図、第３図は給紙部付近
の下部平面図、第４図は通常時の押えコロの位置を示す
側面図、第５図は転写紙検知後の押えコロの位置を示す
側面図、第６図は検知レバーを示す断面図である。 図において、 ２・・・感光体ドラム　１３ａ・・Φ幅ガイド１４・・
・分離ベルト　１５・・・分離ローラ１５ａ・・・従動
ローラ　２６・・・斜送ローラ２４・・・押えコロ　２
９・・・検知レバー出願人　キャノン株式会社 ７ ５２FIG. 1 is a sectional view of a copying machine to which an embodiment of the present invention is applied;
Figure 2 is a top plan view near the paper feed section, Figure 3 is a bottom plan view near the paper feed unit, Figure 4 is a side view showing the position of the presser roller during normal operation, and Figure 5 is after the transfer paper is detected. FIG. 6 is a side view showing the position of the presser roller, and FIG. 6 is a sectional view showing the detection lever. In the figure, 2... Photosensitive drum 13a... Φ width guide 14...
・Separation belt 15...Separation roller 15a...Followed roller 26...Oblique feed roller 24...Press roller 2
9...Detection lever applicant Canon Co., Ltd. 7 52

Claims (2)

【特許請求の範囲】[Claims] （１）像担持体へ転写材を搬送し該転写材へ像を転写後
、転写材を像担持体から分離する画像形成装置において
、 転写材の搬送径路側端部に設けられたガイド、該ガイド
方向へ転写材を搬送する斜送手段と、像担持体から転写
材を分離するため、上記ガイドと斜送ローラとの間に設
けられた転写材通過検知手段とを有することを特徴とす
る画像形成装置。(1) In an image forming apparatus that conveys a transfer material to an image carrier and separates the transfer material from the image carrier after transferring an image to the transfer material, a guide provided at the end of the conveyance path side of the transfer material; The image forming apparatus is characterized by comprising: an oblique feeding means for conveying the transfer material in the guide direction; and a transfer material passage detecting means provided between the guide and the oblique feeding roller to separate the transfer material from the image carrier. Image forming device. （２）前記斜送手段が、駆動回転する斜送ローラと該ロ
ーラに従動回転する押えコロである特許請求の範囲第（
１）項に記載の画像形成装置。(2) The skew feeding means is a skew feeding roller that rotates and a presser roller that rotates as a result of the rotation of the skew feeding roller.
The image forming apparatus according to item 1).
JP14581182A 1982-08-23 1982-08-23 Picture forming device Pending JPS5934571A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14581182A JPS5934571A (en) 1982-08-23 1982-08-23 Picture forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14581182A JPS5934571A (en) 1982-08-23 1982-08-23 Picture forming device

Publications (1)

Publication Number Publication Date
JPS5934571A true JPS5934571A (en) 1984-02-24

Family

ID=15393682

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14581182A Pending JPS5934571A (en) 1982-08-23 1982-08-23 Picture forming device

Country Status (1)

Country Link
JP (1) JPS5934571A (en)

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