JPH07267517A - Paper sheet refeeding device - Google Patents

Paper sheet refeeding device

Info

Publication number
JPH07267517A
JPH07267517A JP6355494A JP6355494A JPH07267517A JP H07267517 A JPH07267517 A JP H07267517A JP 6355494 A JP6355494 A JP 6355494A JP 6355494 A JP6355494 A JP 6355494A JP H07267517 A JPH07267517 A JP H07267517A
Authority
JP
Japan
Prior art keywords
lever
paper
sheet
sheets
intermediate tray
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
JP6355494A
Other languages
Japanese (ja)
Inventor
Katsuyoshi Kuroda
勝良 黒田
Masami Nakane
正美 中根
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.)
Minolta Co Ltd
Original Assignee
Minolta Co Ltd
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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP6355494A priority Critical patent/JPH07267517A/en
Publication of JPH07267517A publication Critical patent/JPH07267517A/en
Pending legal-status Critical Current

Links

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  • Counters In Electrophotography And Two-Sided Copying (AREA)
  • Conveyance By Endless Belt Conveyors (AREA)

Abstract

PURPOSE:To prevent reversing of a fed sheet of paper resulting from various causes and at different timings by furnishing a pressing member and a swingable leading edge holding lever located over an intermediate tray, and therewith pressing the sheets accommodated on the intermediate tray so that they are hindered from moving oppositely to the accommodating direction. CONSTITUTION:To hinder the sheets on an intermediate tray 110 from reversing, a leading edge holding lever 105 is installed in the leading edge guide part 150a of an upper guide plate 150 in such a way as swingable round a pin 107 as fulcrum. The lever 105 is formed by attaching a rubber piece 106 to the tip and energized clockwise by its own weight. Each sheet transported from the accommodation part 130 is intruded between the rubber piece 106 and an aligning plate 110a and accommodated while heaving the lever 105 by the transporting force of an accommodating roller 131 or 133. With the increase in the amount of sheets accommodated, the lever 105 is heaved gradually. Thereby the sheets constituting the uppermost layer of the stack on the tray 110 are hindered from reversing by the pressing force of the lever 105.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、用紙収容装置、特に、
電子写真複写機やレーザプリンタにおいて両面複写や合
成複写を実行するために、画像を記録された用紙を一時
的に収容して給紙する再給紙装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a sheet re-feeding device that temporarily stores and feeds a sheet on which an image is recorded in order to perform double-sided copying or composite copying in an electrophotographic copying machine or a laser printer.

【0002】[0002]

【従来の技術】近年、複写機にあっては、用紙の表裏面
に画像を形成する両面複写や、用紙上に重ねて画像を形
成する合成複写を実行するため、第1面に画像を形成さ
れた用紙を一旦中間トレイ上に積み重ねて収容し、再度
画像転写位置へと給紙する再給紙装置が種々開発されて
いる。
2. Description of the Related Art In recent years, in copying machines, images are formed on the first side in order to execute double-sided copying in which images are formed on the front and back surfaces of a sheet, and composite copying in which images are formed on sheets of paper. Various sheet re-feeding devices have been developed that temporarily stack the stored sheets on an intermediate tray, store them, and feed the sheets again to an image transfer position.

【0003】ところで、この種の再給紙装置にあって
は、中間トレイ上に収容された用紙を位置規制するため
に先端規制後、側部規制板を備えているが、後端規制板
を備えていない機種がある。後端規制が行われないと、
収容された用紙が逆行して再給紙時にマルチフィードが
生じる不具合がある。用紙の逆行は、(1)収容時に用
紙先端が先端規制板に衝突してはね返る、(2)中間ト
レイ台板の傾斜によって収容後の用紙が滑り降りる、
(3)再給紙にマルチフィードを防止するためにさばき
ローラを逆転させる構成では、さばきローラの逆転によ
って用紙が逆行する、(4)側部規制板による整合作用
で用紙が斜行して戻る、(5)帯電によって用紙間で反
発して逆行する、等の現象によって発生する。
By the way, in this kind of sheet re-feeding device, a side regulation plate is provided after the leading edge regulation in order to regulate the position of the sheets accommodated in the intermediate tray. Some models do not have it. If the trailing edge is not regulated,
There is a problem that the stored paper goes backward and multi-feed occurs when re-feeding. As for the backward movement of the sheet, (1) the tip of the sheet collides against the tip regulation plate when the sheet is accommodated and rebounds, (2) the sheet after the accommodation slides down due to the inclination of the intermediate tray base plate,
(3) In the configuration in which the separating roller is rotated in the reverse direction to prevent multi-feed in re-feeding, the sheet moves backward due to the reverse rotation of the separating roller. (4) The sheet skews and returns due to the matching action of the side regulating plate. (5) It is caused by phenomena such as repulsion between paper sheets due to electrification and reverse movement.

【0004】中間トレイ上における用紙の逆行は前述し
た種々の原因があり、かつ、その発生タイミングも様々
である。
The backward movement of the paper on the intermediate tray has the various causes described above, and the generation timing thereof also varies.

【0005】[0005]

【発明の目的】そこで、本発明の目的は、種々の原因、
タイミングで発生する用紙の逆行を確実に防止できる再
給紙装置を提供することにある。
SUMMARY OF THE INVENTION Therefore, the object of the present invention is to solve various causes,
It is an object of the present invention to provide a sheet re-feeding device that can reliably prevent the paper from moving backward at the timing.

【0006】[0006]

【発明の構成、作用、効果】以上の目的を達成するた
め、本発明に係る再給紙装置は、中間トレイ上に収容さ
れた用紙を押圧して該用紙が収容方向とは逆方向に移動
することを阻止する押圧部材を中間トレイの上方に揺動
自在に設置したことを特徴とする。中間トレイ上に送り
込まれてきた用紙にはその上面に押圧部材が当接する。
このとき、押圧部材から用紙に作用する押圧力は用紙の
収容力よりも弱く、押圧部材が用紙の収容を阻止するこ
とはない。一方、用紙が逆行しようとするとき、例えば
用紙が先端規制板に衝突してはね返るとき、押圧部材の
押圧力で用紙の逆行が阻止される。即ち、押圧部材は中
間トレイ上に収容された最上層の用紙を常時押圧し、用
紙の逆行を阻止する。
In order to achieve the above objects, the sheet re-feeding device according to the present invention presses the paper stored in the intermediate tray to move the paper in the direction opposite to the storage direction. It is characterized in that a pressing member for preventing the above-mentioned operation is swingably installed above the intermediate tray. A pressing member abuts on the upper surface of the sheet sent onto the intermediate tray.
At this time, the pressing force applied from the pressing member to the paper is weaker than the paper accommodation force, and the pressing member does not prevent the paper from being accommodated. On the other hand, when the paper tries to go backward, for example, when the paper collides against the leading edge regulation plate and rebounds, the pressing force of the pressing member prevents the paper from going backward. That is, the pressing member constantly presses the uppermost sheet of paper stored on the intermediate tray, and prevents the paper from moving backward.

【0007】[0007]

【実施例】以下、本発明に係る再給紙装置の実施例につ
いて添付図面を参照して説明する。以下に説明する実施
例は本発明を電子写真複写機の両面複写機能を実行する
ための再給紙装置に適用したものである。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a re-feeding device according to the present invention will be described below with reference to the accompanying drawings. In the embodiments described below, the present invention is applied to a re-feeding device for executing the double-sided copying function of an electrophotographic copying machine.

【0008】(複写機の全体構成)図1において、複写
機は、本体1の中段部に作像部2、上段部に露光用光学
系20、下段部に給紙部30、作像部2と給紙部30と
の間に再給紙ユニット100及び再給紙ユニット100
の上流側に用紙反転ユニット50を配置したもので、本
体1の上面には自動原稿搬送装置(ADF)70が設置
されている。なお、ADF70は周知の構成を有し、そ
の説明は省略する。
(Overall Structure of Copying Machine) In FIG. 1, the copying machine includes an image forming section 2 in the middle section of the main body 1, an exposure optical system 20 in the upper section, a sheet feeding section 30, and an image forming section 2 in the lower section. And the sheet feeding unit 30 between the sheet re-feeding unit 100 and the sheet re-feeding unit 100.
A paper reversing unit 50 is arranged on the upstream side of the main body 1, and an automatic document feeder (ADF) 70 is installed on the upper surface of the main body 1. The ADF 70 has a well-known configuration, and the description thereof will be omitted.

【0009】作像部2は、矢印a方向に回転駆動可能な
感光体ドラム3を中心として構成され、その周囲には回
転方向に沿って、残留電荷のイレーサ5、帯電チャージ
ャ6、現像器7、転写チャージャ8、用紙分離チャージ
ャ9、残留トナーのクリーナ10が配置されている。な
お、これらの作像エレメントの構成、作像プロセスは周
知であり、その詳細な説明は省略する。
The image forming unit 2 is constructed around a photosensitive drum 3 which can be driven to rotate in the direction of an arrow a, and the periphery thereof has an eraser 5 of a residual charge, a charging charger 6, and a developing unit 7 along the rotation direction. A transfer charger 8, a sheet separation charger 9 and a residual toner cleaner 10 are arranged. The configurations of these image forming elements and the image forming process are well known, and detailed description thereof will be omitted.

【0010】光学系20は、露光ランプ21、可動ミラ
ー22,23,24、結像用レンズ25、固定ミラー2
6,27,28にて構成され、ランプ21とミラー22
とが一体的にv/m(v:感光体ドラム3の周速度、
m:複写倍率)の速度で、可動ミラー23,24が一体
的にv/2mの速度で、それぞれ矢印b方向に移動可能
とされている。原稿はADF70によって自動的に、あ
るいはオペレータによってマニュアルでプラテンガラス
29上にセットされ、画像はランプ21、ミラー22,
23,24の矢印b方向の移動によってスリット状に感
光体ドラム3上に露光される。
The optical system 20 includes an exposure lamp 21, movable mirrors 22, 23 and 24, an image forming lens 25, and a fixed mirror 2.
The lamp 21 and the mirror 22 are composed of 6, 27 and 28.
And v / m (v: peripheral speed of the photosensitive drum 3,
The movable mirrors 23 and 24 are integrally movable at a speed of v / 2 m in the direction of arrow b at a speed of (m: copy magnification). The document is set on the platen glass 29 automatically by the ADF 70 or manually by the operator, and the image is displayed on the lamp 21, mirror 22,
The movement of 23 and 24 in the direction of arrow b exposes the photosensitive drum 3 in a slit shape.

【0011】給紙部30は、それぞれ異なるサイズの用
紙を収容する自動給紙カセット31〜34と、各カセッ
ト31〜34に配置されたピックアップローラ35、さ
ばきローラ対36、搬送ローラ37対とで構成されてい
る。用紙は選択されたカセットからピックアップローラ
35によって1枚ずつ給紙され、搬送ローラ対37によ
って上方へ搬送される。
The paper feeding section 30 is composed of automatic paper feeding cassettes 31 to 34 for accommodating papers of different sizes, a pickup roller 35, a separating roller pair 36, and a conveying roller 37 pair arranged in each cassette 31 to 34. It is configured. Sheets are fed one by one from the selected cassette by the pickup roller 35, and are conveyed upward by the conveying roller pair 37.

【0012】前記作像部2には、用紙を搬送するための
中間ローラ11、タイミングローラ12、コンベアベル
ト13が設置され、定着器14の下流側に、さらに、中
間ローラ15、排出ローラ16が設置されている。前記
給紙部30から給紙された用紙は中間ローラ11を通じ
てタイミングローラ12まで搬送され、ここで一旦停止
される。次に、用紙は感光体ドラム3上に形成された画
像と同期をとってタイミングローラ12によって転写位
置へ送り込まれる。転写後の用紙はコンベアベルト13
によって定着器14へ送り込まれてトナーの溶融定着を
施され、排出ローラ16からトレイ17へ排出される。
An intermediate roller 11, a timing roller 12, and a conveyor belt 13 for conveying a sheet are installed in the image forming section 2, and an intermediate roller 15 and a discharge roller 16 are provided downstream of the fixing device 14. is set up. The sheet fed from the sheet feeding section 30 is conveyed to the timing roller 12 through the intermediate roller 11 and temporarily stopped there. Next, the paper is sent to the transfer position by the timing roller 12 in synchronism with the image formed on the photosensitive drum 3. The paper after transfer is the conveyor belt 13
Then, the toner is sent to the fixing device 14 and the toner is fused and fixed, and is discharged from the discharge roller 16 to the tray 17.

【0013】用紙反転ユニット50は、第1面に画像を
転写された用紙を受け取って導入路51から一旦反転路
52へ搬送し、用紙の後端が搬送ローラ60,62を抜
けると反転ローラ65,66によって該用紙をスイッチ
バックさせると共に搬送ローラ60,63から送出し路
53を通じて再給紙ユニット100へ送り出す。用紙を
反転ユニット50へ導くため、前記排出ローラ16の直
前に搬送経路を切り換えるための切換え爪18が設置さ
れている。この切換え爪18は図1の実線で示す位置に
セットされているとき用紙を反転ユニット50へガイド
し、この位置から若干時計回り方向に回動した位置にセ
ットされると用紙をトレイ17へガイドする。
The sheet reversing unit 50 receives the sheet on which the image is transferred on the first side, conveys the sheet from the introduction path 51 to the reversing path 52, and once the trailing edge of the sheet leaves the conveying rollers 60 and 62, the reversing roller 65. , 66 to switch back the sheet and send it to the re-feeding unit 100 from the transport rollers 60, 63 through the delivery path 53. In order to guide the sheet to the reversing unit 50, a switching claw 18 for switching the transport path is installed immediately before the discharge roller 16. The switching claw 18 guides the sheet to the reversing unit 50 when set at the position shown by the solid line in FIG. 1, and guides the sheet to the tray 17 when set at a position slightly rotated clockwise from this position. To do.

【0014】再給紙ユニット100は、第1面(表面)
に画像を転写された用紙を一旦収容し、該用紙を所定の
タイミングで再給紙するものであり、中間トレイ11
0、収容部130、ピックアップローラ180、給紙ロ
ーラ190、逆転さばきローラ192等から構成されて
いる。ピックアップローラ180、給紙ローラ190で
再給紙された用紙は搬送ローラ195から前記中間ロー
ラ11、タイミングローラ12へと搬送され、第2面
(裏面)に画像を転写される。
The re-feeding unit 100 has a first surface (front surface).
The sheet on which the image has been transferred is temporarily stored, and the sheet is re-fed at a predetermined timing.
0, the accommodating portion 130, the pickup roller 180, the paper feeding roller 190, the reverse separating roller 192, and the like. The sheet re-fed by the pickup roller 180 and the sheet feeding roller 190 is conveyed from the conveying roller 195 to the intermediate roller 11 and the timing roller 12, and the image is transferred to the second surface (back surface).

【0015】収容部130は用紙サイズに対応して通紙
方向に移動可能であり、大サイズ用紙(A3,B4)は
第1収容ローラ131から中間トレイ110上へ送り込
み、小サイズ用紙(A5,B5,A4)は第2収容ロー
ラ133から中間トレイ110上へ送り込む。
The accommodating section 130 is movable in the sheet passing direction according to the sheet size, and the large size sheets (A3, B4) are fed from the first accommodating roller 131 onto the intermediate tray 110, and the small size sheets (A5, A5). B5, A4) are sent from the second containing roller 133 onto the intermediate tray 110.

【0016】中間トレイ110上において、送り込まれ
た用紙は通紙方向に対しては先端が先端規制板115に
当接して位置規制され、幅方向には両側に設けた規制板
171,172が1枚収容するごとに内側に移動するこ
とにより規制/整合される。なお、本実施例では、種々
の用紙サイズに対応するために収容部130を収容方向
に沿って移動させ、かつ、用紙をサイズに応じてローラ
131,133のいずれかから中間トレイ110に送り
込む。従って、この再給紙ユニット100には用紙の後
端規制板は設置されておらず、従来の技術として記載し
た(1)〜(5)の現象で用紙の逆行が生じうる。
On the intermediate tray 110, the leading edge of the fed sheet contacts the leading edge regulating plate 115 in the sheet passing direction, and the position of the fed sheet is regulated. It is regulated / aligned by moving inward each time a sheet is stored. In this embodiment, the accommodating portion 130 is moved along the accommodating direction to accommodate various sheet sizes, and the sheet is sent to the intermediate tray 110 from either the rollers 131 or 133 depending on the size. Therefore, the re-feeding unit 100 is not provided with the trailing edge regulating plate of the paper, and the paper may go backward due to the phenomena (1) to (5) described in the related art.

【0017】(用紙の逆行阻止機構)中間トレイ110
上での用紙の逆行を阻止するため、図2に示すように、
上ガイド板150の先端ガイド部分150aに先端押さ
えレバー105をピン107を支点として揺動自在に設
けた。先端押さえレバー105は先端にゴム材106を
固着したもので、自重で時計回り方向に付勢されてお
り、中間トレイ110上に用紙が無いときは、中間トレ
イ110の整合台板110a上の凹部110cに当接し
ている(図2中一点鎖線位置参照)。なお、中間トレイ
110は整合台板110aと用紙台板110bとで構成
されている。
(Paper Backward Prevention Mechanism) Intermediate Tray 110
In order to prevent the paper from going backwards, as shown in FIG.
A tip pressing lever 105 is swingably provided on a tip guide portion 150a of the upper guide plate 150 with a pin 107 as a fulcrum. The tip pressing lever 105 has a rubber material 106 fixed to the tip, is biased in the clockwise direction by its own weight, and when there is no paper on the intermediate tray 110, the concave portion on the alignment base plate 110a of the intermediate tray 110. It is in contact with 110c (see the position indicated by alternate long and short dash line in FIG. 2). The intermediate tray 110 is composed of an alignment base plate 110a and a paper base plate 110b.

【0018】収容部130から収容されてきた用紙は、
先端がレバー105のゴム材106と整合台板110a
との間に突入し、収容ローラ131又は133からの搬
送力でレバー105を押し上げて収容される(図2中実
線位置参照)。用紙の収容量が増加するに伴って、レバ
ー105は徐々に押し上げられていく。図2中二点鎖線
で示す位置は、用紙が収容限度枚数(50枚)まで収容
された状態を示す。
The paper stored in the storage unit 130 is
The tip is the rubber material 106 of the lever 105 and the alignment base plate 110a
And the lever 105 is pushed up by the conveying force from the accommodating roller 131 or 133 to be accommodated (see the solid line position in FIG. 2). The lever 105 is gradually pushed up as the amount of paper stored increases. The position indicated by the alternate long and two short dashes line in FIG. 2 indicates a state in which the sheets are stored up to the storage limit number (50 sheets).

【0019】中間トレイ110上に収容された用紙、特
に最上層の用紙は、前記(1)〜(5)の現象で収容方
向とは逆方向に逆行しようとするが、このとき最上層の
用紙はレバー105から作用する押圧力で逆行を阻止さ
れる。ところで、用紙の収容、再給紙を支障なく処理す
るため、レバー105の押圧力は用紙の収容方向への進
行を阻止することなく、かつ、逆行を阻止するように設
定される必要がある。また、用紙の先端部分がレバー1
05の押圧力で折れ曲がって紙詰まりを生じないよう
に、用紙の腰の強さによってレバー105が持ち上がら
なければならい。
The sheets of paper stored on the intermediate tray 110, especially the uppermost sheet of paper, try to go backward in the direction opposite to the storing direction due to the above-mentioned phenomena (1) to (5). Is prevented from moving backward by the pressing force applied from the lever 105. By the way, in order to process the storage and re-feeding of the paper without any trouble, the pressing force of the lever 105 needs to be set so as not to prevent the paper from advancing in the storage direction and to prevent the paper from moving backward. Also, the leading edge of the paper is lever 1
The lever 105 must be lifted depending on the strength of the waist of the paper so that the paper is not bent due to the pressing force of 05 to cause a paper jam.

【0020】本実施例において、レバー105の押圧力
は1〜3gであり、レバー105とゴム材106の自重
によって得ている。但し、レバー105の支承部分にコ
イルばね又はトーションばねを設けて押圧力を付加して
もよい。
In this embodiment, the pressing force of the lever 105 is 1 to 3 g, which is obtained by the weight of the lever 105 and the rubber material 106. However, a pressing force may be applied by providing a coil spring or a torsion spring in the supporting portion of the lever 105.

【0021】ここで、先端押さえレバー105の設定条
件について説明する。図3において、Pはレバー105
の支点、Rは用紙Sに対する作用点、Hはレバー105
の設置高さ、θはレバー105と鉛直線で形成される角
度、Nは作用点Rで鉛直方向下向きに作用する力(押圧
力)である。レバー105の長さをL、レバー105
(ゴム材106)と用紙Sとの摩擦係数をμとする。
The setting conditions of the tip pressing lever 105 will be described. In FIG. 3, P is the lever 105
Fulcrum, R is the point of action on the paper S, H is the lever 105
Is the installation height, θ is the angle formed by the vertical line with the lever 105, and N is the force (pressing force) acting vertically downward at the point of action R. L is the length of the lever 105, and the lever 105
The friction coefficient between the (rubber material 106) and the paper S is μ.

【0022】用紙Sが逆行方向に移動しようとすると
き、作用点Rで用紙Sとレバー105との摩擦力がレバ
ー105を揺動させる力よりも大きければ、レバー10
5に支点Pを中心とした時計回り方向に揺動しようとす
る力が働き、レバー105が作用点に喰い込んで用紙S
の逆行を阻止する。
When the paper S is going to move in the reverse direction, if the frictional force between the paper S and the lever 105 at the point of action R is larger than the force for rocking the lever 105, the lever 10
A force to swing in a clockwise direction around the fulcrum P acts on the sheet 5, and the lever 105 bites into the point of action to cause the sheet S to move.
Prevent the retrograde of.

【0023】作用点Rでの摩擦力とレバー105を揺動
させる力との関係は、 μNcosθ=Nsinθ であるが、摩擦力がレバー105を時計回り方向に揺動
させるには、 μNcosθ>Nsinθ の関係を満足する必要がある。押圧力Nは正数であり、
0゜<θ<90゜の範囲では、cosθ>0であるから、 μcosθ>sinθ ∴μ>tanθ ……(1) 以上の解析から明らかなように、式(1)を満足するよ
うに摩擦係数μと角度θを設定すればよい。
The relationship between the frictional force at the point of action R and the force for swinging the lever 105 is μNcosθ = Nsinθ, but in order for the frictional force to swing the lever 105 clockwise, μNcosθ> Nsinθ You need to satisfy the relationship. The pressing force N is a positive number,
In the range of 0 ° <θ <90 °, cosθ> 0. Therefore, μcosθ> sinθ ∴μ> tanθ (1) As is clear from the above analysis, the friction coefficient should satisfy the formula (1). It suffices to set μ and the angle θ.

【0024】前記式(1)からはレバー105の重量は
除外されている。しかし、用紙は収容時には図3中右方
にレバー105を持ち上げて進行しなければならず、レ
バー105が重いと用紙の先端が座屈して紙詰まりを生
じる。従って、レバー105は最も腰の弱い用紙が座屈
する力よりも小さく設定する必要がある。また、用紙が
座屈する力はレバー105の取付け角度θが関係し、角
度θが大きくなれば小さくなる。
The weight of the lever 105 is excluded from the equation (1). However, when the sheet is stored, the lever 105 must be lifted to the right in FIG. 3 to advance, and if the lever 105 is heavy, the leading edge of the sheet will buckle and jam the sheet. Therefore, the lever 105 needs to be set to be smaller than the buckling force of the weakest paper. Further, the buckling force of the paper is related to the mounting angle θ of the lever 105, and becomes smaller as the angle θ becomes larger.

【0025】ところで、角度θは収容枚数に比例して増
加するため、用紙厚さhに対応する増加分Δθを見込ん
で摩擦係数μと角度θとを決める必要がある。 tanθ=√(L2−H2)/H tan(θ+Δθ)=√{L2−(H−h)2}/(H−
h) であり、従って、 μ>tan(θ+Δθ) ……(2) を満足する必要がある。
Since the angle θ increases in proportion to the number of sheets accommodated, it is necessary to determine the friction coefficient μ and the angle θ in consideration of the increase Δθ corresponding to the sheet thickness h. tan θ = √ (L 2 −H 2 ) / H tan (θ + Δθ) = √ {L 2 − (H−h) 2 } / (H−
h), and therefore μ> tan (θ + Δθ) (2) needs to be satisfied.

【0026】用紙Sの増加分hは50枚収容時で約5m
mであり、Δθはレバー長Lが35mmのときに15゜
〜20゜となる。摩擦係数μは一般的な材料で0.8〜
2.0であり、式(2)を満足するには角度θを20゜
〜45゜に設定すればよい。
The increase h of the paper S is about 5 m when 50 sheets are stored.
m, and Δθ is 15 ° to 20 ° when the lever length L is 35 mm. Friction coefficient μ is 0.8 for general materials
The angle θ is 2.0, and the angle θ may be set to 20 ° to 45 ° to satisfy the formula (2).

【0027】次に、先端押さえレバー105の通紙幅方
向の位置を説明する。種々のサイズの用紙を幅方向の中
央を基準として通紙する形態では、図4に示すように、
レバー105をピックアップローラ180及び給紙ロー
ラ190に対して通紙方向に一直線上に配置する。これ
は、用紙が逆行しようとするとき、レバー105の押圧
力が用紙に対して均一に作用させるためである。
Next, the position of the leading edge pressing lever 105 in the sheet passing width direction will be described. In a mode in which sheets of various sizes are passed with the center in the width direction as a reference, as shown in FIG.
The lever 105 is arranged in a straight line in the sheet passing direction with respect to the pickup roller 180 and the sheet feeding roller 190. This is because the pressing force of the lever 105 acts uniformly on the paper when the paper tries to go backward.

【0028】種々のサイズの用紙を片側を基準として通
紙する形態、具体的には、図5に示すように、側部規制
板171を基準として通紙する形態では、レバー105
を最小サイズ用紙(A5縦)の幅方向中央に配置する。
他のサイズの用紙ではレバー105が幅方向の中央に位
置しなくなるが、片側通紙の場合は、用紙が側部規制板
171と先端規制板115とで2辺で位置規制されるた
め、レバー105が幅方向に偏在して押圧しても用紙が
移動することはない。
In a mode in which sheets of various sizes are passed with one side as a reference, specifically, with a side regulation plate 171 as a reference, as shown in FIG. 5, the lever 105 is used.
Is arranged at the center of the minimum size paper (A5 portrait) in the width direction.
The lever 105 is not located at the center in the width direction for other size sheets, but in the case of one-sided sheet feeding, the sheet is regulated on the two sides by the side regulation plate 171 and the tip regulation plate 115. Even if 105 is unevenly distributed in the width direction and pressed, the paper does not move.

【0029】なお、本発明に係る再給紙装置は前記実施
例に限定するものではなく、その要旨の範囲内で種々に
変更できる。特に、前記実施例ではレバー105が用紙
の先端部分を押圧するように構成したが、用紙の通紙方
向中央部分あるいは後端部分を押圧するように構成して
もよい。また、再給紙装置自体の基本的構成は任意であ
る。
The sheet re-feeding device according to the present invention is not limited to the above embodiment, but can be variously modified within the scope of the invention. In particular, although the lever 105 is configured to press the leading end portion of the sheet in the above-described embodiment, it may be configured to press the central portion or the rear end portion of the sheet in the sheet passing direction. Further, the basic configuration of the re-feeding device itself is arbitrary.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例である再給紙ユニットを備え
た複写機の内部構成図。
FIG. 1 is an internal configuration diagram of a copying machine including a re-feeding unit that is an embodiment of the present invention.

【図2】前記再給紙ユニットの内部構成図。FIG. 2 is an internal configuration diagram of the re-feeding unit.

【図3】前記再給紙ユニットに内蔵されている先端押さ
えレバーの設置条件を示す説明図。
FIG. 3 is an explanatory diagram showing installation conditions of a leading edge pressing lever built in the refeed unit.

【図4】中央通紙形態において、前記先端押さえレバー
の設置位置を示す平面図。
FIG. 4 is a plan view showing an installation position of the leading end pressing lever in a central sheet feeding mode.

【図5】片側通紙形態における前記先端押さえレバーの
設置位置を示す平面図。
FIG. 5 is a plan view showing an installation position of the leading edge pressing lever in a one-sided sheet passing mode.

【符号の説明】[Explanation of symbols]

100…再給紙ユニット 105…先端押さえレバー 110…中間トレイ 180…ピックアップローラ 190…給紙ローラ 100 ... Refeeding Unit 105 ... Tip Holding Lever 110 ... Intermediate Tray 180 ... Pickup Roller 190 ... Feeding Roller

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 1枚ずつ送り込まれる画像を記録された
用紙を中間トレイ上に積み重ねて収容し、収容された用
紙を1枚ずつ収容方向と同じ方向に再給紙する再給紙装
置において、 用紙を積載収容するための中間トレイと、 用紙の先端を規制し、再給紙時には規制を解除する先端
規制部材と、 前記中間トレイ上に収容された用紙を1枚ずつ収容方向
と同じ方向に給紙する給紙手段と、 前記中間トレイの上方に揺動自在に設置され、中間トレ
イ上に収容された用紙を押圧して該用紙が収容方向とは
逆方向に移動することを阻止する押圧部材と、 を備えたことを特徴とする再給紙装置。
1. A re-feeding device for accommodating sheets of paper on which images fed one by one are recorded on an intermediate tray in a stacked manner and re-feeding the accommodated sheets of paper one by one in the same direction as the accommodating direction, An intermediate tray for stacking and storing sheets, a leading edge regulating member that regulates the leading edge of the sheets and releases the regulation when re-feeding, and the sheets accommodated on the intermediate tray one by one in the same direction as the storing direction. Paper feeding means for feeding paper and a swinging member installed above the intermediate tray to press the paper stored in the intermediate tray and prevent the paper from moving in the direction opposite to the storage direction. A re-feeding device comprising: a member;
JP6355494A 1994-03-31 1994-03-31 Paper sheet refeeding device Pending JPH07267517A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6355494A JPH07267517A (en) 1994-03-31 1994-03-31 Paper sheet refeeding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6355494A JPH07267517A (en) 1994-03-31 1994-03-31 Paper sheet refeeding device

Publications (1)

Publication Number Publication Date
JPH07267517A true JPH07267517A (en) 1995-10-17

Family

ID=13232565

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6355494A Pending JPH07267517A (en) 1994-03-31 1994-03-31 Paper sheet refeeding device

Country Status (1)

Country Link
JP (1) JPH07267517A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006268780A (en) * 2005-03-25 2006-10-05 Toshiba Corp Paper sheet accumulation device and paper sheet processor
JP2012022705A (en) * 2011-09-07 2012-02-02 Toshiba Corp Paper sheet accumulation device and paper sheet processing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006268780A (en) * 2005-03-25 2006-10-05 Toshiba Corp Paper sheet accumulation device and paper sheet processor
JP2012022705A (en) * 2011-09-07 2012-02-02 Toshiba Corp Paper sheet accumulation device and paper sheet processing apparatus

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