JPH05124774A - Paper sheet re-feed device - Google Patents
Paper sheet re-feed deviceInfo
- Publication number
- JPH05124774A JPH05124774A JP3311504A JP31150491A JPH05124774A JP H05124774 A JPH05124774 A JP H05124774A JP 3311504 A JP3311504 A JP 3311504A JP 31150491 A JP31150491 A JP 31150491A JP H05124774 A JPH05124774 A JP H05124774A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- feeding
- regulating member
- feed
- sheet bundle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Facsimiles In General (AREA)
- Handling Of Cut Paper (AREA)
- Counters In Electrophotography And Two-Sided Copying (AREA)
- Paper Feeding For Electrophotography (AREA)
- Conveyance By Endless Belt Conveyors (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は複写機、フアクシミリ、
プリンタなどの画像形成装置の給紙装置に係り、特に片
面に画像を形成済みの用紙を積載収容する中間トレイか
ら、もう一方の用紙面に画像形成すべく、再度作像部に
向けて用紙を給紙する再給紙装置に関する。BACKGROUND OF THE INVENTION The present invention relates to a copying machine, a facsimile machine,
Related to a sheet feeding device of an image forming apparatus such as a printer, particularly from an intermediate tray that stacks and stores sheets on which images have been formed on one side, to form an image on the other side of the sheet, the sheet is again directed toward the image forming unit. The present invention relates to a sheet re-feeding device.
【０００２】[0002]
【従来の技術】複写機の両面装置等には、作成されるコ
ピーの頁順を合わせたり、処理速度を向上させるために
下送りの再給紙装置が使用される。2. Description of the Related Art In a double-sided device of a copying machine, a downward-feeding re-feeding device is used to adjust the page order of copies to be made and to improve the processing speed.
【０００３】ところで、一般に、下送り給紙において
は、最下紙の給送時、上方の用紙束も一緒に分離ニツプ
へ送り込まれようとするので、上送り給紙よりも給紙ト
ラブル（重送、不送り、スリツプ等）が発生しやすい。By the way, generally, in the lower feed method, when the lowermost sheet is fed, the upper sheet bundle is also tried to be fed into the separation nip, so that a paper feeding trouble (heavy paper feeding) occurs. (Sending, non-feeding, slipping, etc.) are likely to occur.
【０００４】これを改善するための従来技術として、用
紙束の送り込み側下方を上方よりも先行させた楔形状に
することが知られている。用紙束をこのような形状にし
て、下側の用紙から順に給紙すると、最下紙が分離ニツ
プに達しやすく、また上方の用紙束が分離しやすくなる
ので、給紙性が向上することが知られている。As a conventional technique for improving this, it is known to form a wedge shape in which the lower side of the sheet bundle on the feeding side precedes the upper side. If the sheet bundle is shaped like this and the sheets are fed in order from the lower sheet, the bottom sheet is likely to reach the separation nip, and the upper sheet bundle is easily separated, so that the sheet feeding performance may be improved. Are known.
【０００５】用紙束に上記楔形状を形成させる手段とし
て、分離ニツプ手前に傾斜した捌き部材を設けて、用紙
束をこの捌き部材に突き当てて先端を楔状にずらす技術
がある（例えば、特開平２−１７８１３４号公報）。As a means for forming the wedge shape on the sheet bundle, there is a technique in which an inclined separating member is provided in front of the separation nips and the sheet bundle is abutted against the separating member to shift the leading end in a wedge shape (see, for example, Japanese Laid-Open Patent Publication No. 2-178134).
【０００６】図１１、図１２、図１３に捌き部材を設け
た従来例による用紙束の給送状態を示す。FIG. 11, FIG. 12, and FIG. 13 show the feeding state of a sheet bundle according to a conventional example provided with a separating member.
【０００７】図１１に示すように、送り出しローラ１２
０と加圧板１１５との作用により、中間トレイ１０１上
の用紙束２００は捌き部材１６０に達する。１３０はフ
イードローラ、１３１はセパレートローラである。As shown in FIG. 11, the delivery roller 12
By the action of 0 and the pressure plate 115, the sheet bundle 200 on the intermediate tray 101 reaches the separating member 160. Reference numeral 130 is a feed roller, and 131 is a separate roller.
【０００８】図１２は用紙束２００の前縁が捌き部材１
６０と衝合した時の力関係を示すものである。In FIG. 12, the front edge of the sheet bundle 200 is separated by the separating member 1.
It shows the relationship of power when it collides with 60.
【０００９】捌き部材１６０を押上げる力Ｎ1 は、用紙
束２００を戻そうとする力Ｑと用紙束２００を押し下げ
ようとする力Ｓと釣り合うと考えて各部の力を計算す
る。押し下げ力Ｓの作用により、移動されるべき用紙束
２００の一部２００ａの上面と下面には移動抵抗（摩擦
力）Ｒ1 およびＲ2 が発生する。この楔抵抗力Ｒ1 ，Ｒ
2 の大きさは送り出しローラ１２０による搬送力Ｆ、用
紙と中間トレイ１０１との間の摩擦係数μ1 、用紙間の
摩擦係数μP 、および中間トレイ１０１に対して垂直な
線と捌き部材１６０とのなす角度θで決まる。ここで移
動抵抗Ｒ2 が用紙束２００を戻そうとする力Ｑより大き
いと捌き部材１６０の下部で用紙が閉塞する。角度θを
小さくすると通しやすいが、用紙がフエースカールして
いると給送時、捌き部材１６０で図１３に示すように不
送りになるので、角度θは３０度〜４５度が一般的であ
る。なお、これらの間の力関係は、 Ｆ＝Ｑ＋Ｒ1 Ｑ＝Ｎ1 ｃｏｓθ Ｓ＝Ｎ2 ＝Ｎ1 ｓｉｎθ＝Ｑｔａｎθ Ｒ1 ＝μ1 Ｓ＝｛μ1 ｔａｎθ／（１＋μ1 ｔａｎθ）｝Ｆ Ｒ2 ＝μp Ｓ≒μp ｔａｎθ・Ｆ で表され、下層紙通過条件は、 ｔａｎθ＜１／（μ1 ＋μp ） である。The force N 1 for pushing up the separating member 160 is considered to be balanced with the force Q for returning the sheet bundle 200 and the force S for pushing down the sheet bundle 200, and the force of each part is calculated. Due to the action of the pressing force S, movement resistances (friction forces) R 1 and R 2 are generated on the upper surface and the lower surface of the part 200a of the sheet bundle 200 to be moved. This wedge resistance R 1 , R
The size of 2 is the conveyance force F by the delivery roller 120, the friction coefficient μ 1 between the paper and the intermediate tray 101, the friction coefficient μ P between the paper, and the line perpendicular to the intermediate tray 101 and the separating member 160. Is determined by the angle θ formed by. Here, if the movement resistance R 2 is larger than the force Q for returning the sheet bundle 200, the sheet is closed at the lower part of the separating member 160. When the angle θ is small, it is easy to pass the sheet, but when the paper is face curled, the separating member 160 does not feed the sheet as shown in FIG. 13, so the angle θ is generally 30 degrees to 45 degrees. .. The force relationship between them is as follows: F = Q + R 1 Q = N 1 cos θ S = N 2 = N 1 sin θ = Q tan θ R 1 = μ 1 S = {μ 1 tan θ / (1 + μ 1 tan θ)} F R 2 = Μ p S ≈μ p tan θ · F, and the lower layer paper passage condition is tan θ <1 / (μ 1 + μ p ).
【００１０】[0010]
【発明が解決しようとする課題】上記従来技術において
は、給紙台にセツトされる用紙束は剛性捌き板に衝合し
て始めて鋭角状の楔に整頓される。In the above-mentioned prior art, the bundle of sheets set on the sheet feed tray is not arranged into the wedge having an acute angle until it abuts against the rigid separating plate.
【００１１】しかしながら、首尾よく用紙束に楔形状が
形成されたとしても、用紙束の枚数が増大したり、送り
込み力を大きくできない場合や、用紙間の摩擦係数が大
きな用紙を取り扱う時などでは、最下紙給送時、傾斜面
部で用紙間の圧力が高まる、いわゆる捌き部材の楔効果
によつて、用紙束が閉塞状態となり、最下紙が分離ニツ
プに達しなくてジヤムを生じたり、スリツプ、ブロツク
重送等が発生しやすい。However, even if the wedge shape is successfully formed in the sheet bundle, when the number of sheets in the sheet bundle increases, the feeding force cannot be increased, or when a sheet having a large friction coefficient between sheets is handled, At the time of feeding the bottom sheet, the pressure between the sheets increases on the inclined surface, the so-called wedging effect of the separating member causes the sheet bundle to be closed, and the bottom sheet does not reach the separation nip, causing a jam or slipping. , Block double feeding is likely to occur.
【００１２】なお、送り込み力を増大させることによ
り、閉塞を解消できるが、その場合は必要以上の負荷が
掛かり、捌き部材の摩耗や異常振動を発生しやすい。ま
た、両面装置では片面画像形成後の用紙を取り扱うた
め、捌き部で高い圧力が掛かると、用紙の画像部のトナ
ー、インク等が相手用紙面とこすれ合つて脱落し、相手
用紙面を汚染したりする不具合がある。これは特に、画
像が上方側に向いた紙束（フエースアツプ状態）を下送
りで最下紙から給紙する条件で極めて顕著に発生する。It should be noted that the blockage can be eliminated by increasing the feeding force, but in that case, a load more than necessary is applied, and the separation member is apt to wear and abnormal vibration. Also, since the double-sided device handles the paper on which one side of the image has been formed, when high pressure is applied to the separation section, toner, ink, etc. in the image section of the paper rub against the surface of the mating paper and fall off to contaminate the mating paper surface. There is a problem that. This occurs particularly remarkably under the condition that a sheet bundle with the image facing upward (face-up state) is fed downward from the bottom sheet.
【００１３】本発明はこのような背景に基づいてなされ
たものであり、上記従来技術の欠点を解消し、信頼性の
高い下送り給紙を行うことができる再給紙装置を提供す
ることを目的とする。The present invention has been made based on such a background, and it is an object of the present invention to solve the above-mentioned drawbacks of the prior art and to provide a re-feeding device capable of highly reliable down-feeding. To aim.
【００１４】[0014]
【課題を解決するための手段】上記目的は、中間トレイ
に積載された片面画像形成済みの用紙のもう一方の面に
画像を形成すべく、最下紙より順に１枚ずつ画像形成装
置本体の作像部に向けて給紙する再給紙装置において、
最下紙より１枚ずつ再給紙するための分離ニツプを構成
するフイードローラと分離部材からなる再給紙手段と、
用紙先端との衝合面と前記中間トレイの用紙の積載面と
のなす角度を鋭角にして前記衝合面を上流側に傾斜さ
せ、再給紙に先立つて前記衝合面が開放されるストツパ
ゲート手段と、前記再給紙手段の分離ニツプと前記スト
ツパゲート手段との間の搬送路上に、前記衝合面と同方
向に傾斜し、上方が固定され下方が自由端となつた弾性
摩擦体からなり、自由端と下側搬送面間が所定量の隙間
を持つて配置された給送量規制部材とを備えたことによ
り達成される。SUMMARY OF THE INVENTION The above-mentioned object is to form an image on the other side of one-sided image-formed sheets stacked on an intermediate tray, one sheet at a time starting from the bottom sheet. In the re-feed device that feeds toward the image forming unit,
Refeeding means including a feed roller and a separating member that form a separating nip for refeeding one by one from the bottom sheet,
A stopper gate is formed in which the abutment surface with the leading edge of the paper and the paper stacking surface of the intermediate tray form an acute angle to incline the abutment surface toward the upstream side, and the abutment surface is opened prior to re-feeding. On the conveying path between the separating means of the sheet re-feeding means and the stopper gate means, the elastic friction body is inclined in the same direction as the abutting surface, the upper side is fixed and the lower side is a free end. This is achieved by providing a feed amount regulating member arranged with a predetermined amount of clearance between the free end and the lower transport surface.
【００１５】この場合、前記給送量規制部材を分離ニッ
プ近傍に配置したり、給送量規制部材の用紙当接側上部
に、給送量規制部材よりも摩擦係数の小さいシートを設
けることが好ましい。また、給送量規制部材の自由端に
対向して自由端との間に空間をおいて搬送ガイド部材を
設けてもよい。In this case, the feed amount regulating member may be arranged near the separation nip, or a sheet having a friction coefficient smaller than that of the feed amount regulating member may be provided above the sheet contact side of the feed amount regulating member. preferable. Further, a conveyance guide member may be provided so as to face the free end of the feed amount regulating member and leave a space between the free end and the free end.
【００１６】[0016]
【作用】先端が自由端となつた弾性体で構成される給送
量規制部材は、先端ほど規制力が弱いので、用紙束の上
層部が規制され、下層部のみが通過させられることで、
用紙束の先端が楔状にずらされる。Since the feeding amount regulating member constituted by the elastic body having the free end at the leading end has a weaker regulating force toward the leading end, the upper layer portion of the sheet bundle is regulated, and only the lower layer portion is allowed to pass.
The leading edge of the sheet bundle is shifted like a wedge.
【００１７】[0017]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。図２は複写機の両面装置の構成図である。同図に
おいて、両面装置１００は、中間トレイ１０１と、中間
トレイ１０１の搬送方向下流側に設けられた搬送ローラ
１０２と、さらにその下流側に設けられたストッパ１０
３と、中間トレイ１０１の下面側に設けられ中間トレイ
１０１上の用紙を送り出す送り出しローラ１２０群とか
ら主に構成されている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a block diagram of a double-sided device of a copying machine. In FIG. 1, the double-sided device 100 includes an intermediate tray 101, a transport roller 102 provided on the downstream side of the intermediate tray 101 in the transport direction, and a stopper 10 provided further downstream thereof.
3 and a group of feed rollers 120 that are provided on the lower surface side of the intermediate tray 101 and that feeds the sheet on the intermediate tray 101.
【００１８】感光体ドラム１上の画像が転写されること
で、片面複写済みの用紙２は定着装置３、分岐爪４、ス
イツチバツク反転装置５を経て両面装置１００内へ送り
込まれる。両面装置１００へ搬入された用紙２は搬送方
向の用紙長さに応じて予め定められたＡ１〜Ａ４の放出
ゲートから中間トレイ１０１上に放出収容される。即
ち、長手紙はＡ１側から、また短手紙はＡ４側から放出
される。放出後の用紙２は既に収容済みの用紙２上を滑
り、さらに、搬送ローラ１０２によつて搬送され、スト
ツパ（ストツパゲート手段）１０３に衝合されて用紙進
行縁が整合される。By transferring the image on the photoconductor drum 1, the sheet 2 which has been copied on one side is fed into the double-sided apparatus 100 through the fixing device 3, the branching claw 4, and the switchback reversing device 5. The sheet 2 carried into the double-sided device 100 is discharged and stored on the intermediate tray 101 from the discharge gates A1 to A4 which are predetermined according to the sheet length in the transport direction. That is, the long letter is emitted from the A1 side and the short letter is emitted from the A4 side. The discharged sheet 2 slides on the already stored sheet 2, is further conveyed by the conveying roller 102, and is collided with the stopper (stopper gate means) 103 to align the sheet advancing edges.
【００１９】所定枚数の用紙２が収容されると、ストツ
パ１０３が支軸１０４を中心に１回動し、搬送路が開放
される。その後、欠円部を有する送り出しローラ群１２
０が１回転し、用紙束２００全体を下流の分離ローラ対
１０５へ移送すると共に、分離ローラ対１０５によつて
最下紙が１枚だけ分離されて繰り出され、両面装置１０
０より送出される。When a predetermined number of sheets of paper 2 are stored, the stopper 103 makes one turn around the support shaft 104, and the conveying path is opened. After that, the delivery roller group 12 having a missing circle portion 12
0 rotates once, and the entire sheet bundle 200 is transferred to the separation roller pair 105 on the downstream side, and at the same time, the separation roller pair 105 separates and feeds the bottom sheet by one sheet, and the double-sided device 10
It is sent from 0.
【００２０】図１は第１の実施例に係る再給紙装置の要
部詳細構成図、図３は再給紙装置の分離給紙時の状態を
示す要部構成図である。搬送ローラ１０２は比較的摩擦
係数の低い材質からなり、支持アーム１０７によつて支
持され、支持アーム１０７はさらに、駆動軸１０８から
懸下される。駆動軸１０８と搬送ローラ１０２間にはプ
ーリを介してベルト１０９が張設され、搬送ローラ１０
２を反時計方向に回転させる。放出後の用紙２は搬送ロ
ーラ１０２によつてストツパ衝合面１０３ａまで搬送さ
れ、用紙衝合の後は搬送ローラ１０２が用紙２上でスリ
ツプ回転するので、衝合した用紙２に座屈が生じること
はない。また、収容される用紙２の枚数が増加するに従
い、搬送ローラ１０２は軸１０８を中心に上方へ移動す
ることができる。FIG. 1 is a detailed configuration diagram of a main portion of a re-feeding device according to the first embodiment, and FIG. 3 is a main-portion configuration diagram showing a state of the re-feeding device during separated sheet feeding. The transport roller 102 is made of a material having a relatively low coefficient of friction, and is supported by a support arm 107, and the support arm 107 is further suspended from a drive shaft 108. A belt 109 is stretched between the drive shaft 108 and the conveyance roller 102 via a pulley, and the conveyance roller 10
Rotate 2 counterclockwise. The discharged sheet 2 is conveyed to the stopper abutment surface 103a by the conveying roller 102, and after the sheet abuts, the conveying roller 102 slips on the sheet 2 so that the abutted sheet 2 is buckled. There is no such thing. Further, as the number of sheets of paper 2 accommodated increases, the transport roller 102 can move upward around the shaft 108.
【００２１】ストツパ１０３は分離ローラ対１０５を構
成するフイードローラ１３０、セパレートローラ１３１
のなす分離ニツプ（ニツプ部）Ｎの上流に配置されて、
ソレノイド１０６によつてその衝合面１０３ａが搬送路
から進退する。また、その衝合面１０３ａは中間トレイ
１０１の積載面に対し上流側へ傾斜して設けられる。ス
トッパ１０３の図４の（ａ）に示す角度（傾斜角）θは
３０度〜７０度が望ましい。なお、符号１１２は用紙２
のカールや浮き上がりを上から押さえる紙押さえガイド
を示す。The stopper 103 comprises a feed roller 130 and a separate roller 131 which form a separation roller pair 105.
Is arranged upstream of the separation nipple (nip part) N
The abutting surface 103a moves back and forth from the transport path by the solenoid 106. The abutting surface 103a is provided so as to be inclined toward the upstream side with respect to the stacking surface of the intermediate tray 101. The angle (tilt angle) θ of the stopper 103 shown in FIG. 4A is preferably 30 degrees to 70 degrees. In addition, reference numeral 112 is a sheet 2
The paper holding guide that holds the curl and floating of the paper from above is shown.
【００２２】従つて、収容後の用紙束２００の再送端形
状は図２に示すような下方が先行し、上方が徐々に後退
した略楔形に積載収容することができる。なお、再送端
の形状はこの他図４の（ｂ）〜（ｅ）のように変更可能
である。また、傾斜角θが大きい場合、放出後の用紙２
が衝合面１０３ａに沿つて進入しやすくなるので、衝合
面１０３ａに適度の摩擦係数を持つ部材や起毛シート等
を貼付したり、平行溝や凹凸を表面に刻設して、用紙２
のもぐり込みを防止するとよい。Accordingly, as shown in FIG. 2, the re-sending end shape of the bundle of sheets 200 after being accommodated can be stacked and accommodated in a substantially wedge shape in which the lower side is first and the upper side is gradually retracted. The shape of the retransmission end can be changed as shown in FIGS. 4 (b) to 4 (e). Further, when the inclination angle θ is large, the paper 2 after being discharged
Can easily enter along the abutting surface 103a. Therefore, a member having an appropriate friction coefficient, a brushed sheet, or the like can be attached to the abutting surface 103a, or parallel grooves or irregularities can be engraved on the surface of the paper 2
It is good to prevent the entanglement.
【００２３】中間トレイ１０１の再送側の下方に複数の
送り出しローラ１２０が設けられる。送り出しローラ１
２０は半月状、三角形状、多角形状等の高摩擦材質（例
えば、軟質ゴムやスポンジゴム）よりなり、用紙収容時
はその表面が中間トレイ１０１の搬送面より下方へ退避
しているが、再送時は中間トレイ１０１上の開口１０１
ａから外周が飛び出て、最下紙と接触し、用紙束２００
を上方へ持ち上げるようにして用紙束２００全体を分離
ローラ対１０５へ移送する。送り出しローラ１２０は１
回転制御されるクラツチ１１３によつて駆動される。A plurality of delivery rollers 120 are provided below the retransmission side of the intermediate tray 101. Sending roller 1
Reference numeral 20 is made of a high-friction material (for example, soft rubber or sponge rubber) having a half-moon shape, a triangular shape, a polygonal shape, and the like. The opening 101 on the intermediate tray 101
The outer periphery of the paper stack a
And the whole sheet bundle 200 is transferred to the separation roller pair 105. Sending roller 120 is 1
It is driven by a clutch 113 whose rotation is controlled.
【００２４】用紙束２００の再送端上方に支軸１１４に
支持され、支軸１１４を中心にソレノイド１１６によつ
て揺動制御される加圧板１１５が設けられる。加圧板１
１５は用紙収容時は図１のように、上部ガイド板１１０
内に退避しているが、再送時は送り出しローラ１２０の
回転に合わせ、開口１１０ａから最上紙上に降下して用
紙束２００を送り出しローラ１２０側に押圧付勢する。A pressure plate 115, which is supported by a support shaft 114 and whose swing is controlled by a solenoid 116 about the support shaft 114, is provided above the resend end of the sheet bundle 200. Pressure plate 1
15 is an upper guide plate 110 as shown in FIG.
Although it is retracted inside, the sheet bundle 200 is pushed down toward the delivery roller 120 side by descending from the opening 110a onto the uppermost sheet in accordance with the rotation of the delivery roller 120 at the time of retransmission.
【００２５】用紙分離部は、給送方向に駆動されるフイ
ードローラ１３０、このフイードローラ１３０に圧接付
勢され、トルクリミツタ（図示せず）を介して反給送方
向に駆動されるセパレートローラ１３１、上部ガイド板
１１０、下部ガイド板１１１等から構成される。フイー
ドローラ１３０、セパレートローラ１３１のニツプ部Ｎ
に用紙２が１枚ある時、および用紙２がない時はトルク
リミツタが滑り、セパレートローラ１３１はフイードロ
ーラ１３０に連れ回りする。The sheet separating portion is fed by a feed roller 130 driven in the feeding direction, a separate roller 131 which is pressed against the feeding roller 130 and is driven in the counter feeding direction by a torque limiter (not shown), and an upper guide. It is composed of a plate 110, a lower guide plate 111, and the like. Nip portion N of feed roller 130 and separate roller 131
When there is one sheet 2 and when there is no sheet 2, the torque limiter slides and the separate roller 131 rotates with the feed roller 130.
【００２６】また、ニツプ部Ｎに用紙２が２枚以上ある
時は用紙間の摩擦力よりもセパレートローラ１３１の戻
し力ＴA が大きくなるため、２枚目以後の用紙２は進行
が阻止され、上流側へ戻される。ここで、 ＴA ＞μP ・ＰB が分離条件となる。 ただし、ＴA ：セパレートローラ戻し力（トルクリミツ
タの設定トルクできまる） ＰB ：セパレートローラの圧力 μP ：用紙間摩擦力 である。分離部から送出された用紙２は搬送ローラ対１
３２により搬出される。Further, when there are two or more sheets of paper 2 in the nip portion N, the returning force T A of the separate roller 131 is larger than the frictional force between the sheets, so that the second and subsequent sheets of paper 2 are prevented from advancing. , Returned to the upstream side. Here, T A > μ P · P B is the separation condition. However, T A is the returning force of the separate roller (the set torque of the torque limiter can be obtained) P B is the pressure of the separating roller μ P : It is the friction force between the sheets. The paper 2 sent out from the separating unit is a pair of conveyance rollers 1.
It is carried out by 32.
【００２７】分離ニツプＮの上流かつストツパ衝合面１
０３ａの下流の間、好ましくは分離ニツプＮから２０ｍ
ｍ以下の近接した位置に、ストツパ衝合面１０３ａと同
方向に傾斜した給送量規制部材１５０が設けられる。図
５は給送量規制部材近傍の拡大構成図であり、給送量規
制部材１５０は上部ガイド板１１０から延びた支持部１
１０ｂ上に貼り付けられた可撓性の弾性摩擦体（例えば
ウレタンゴム、熱可塑性エラストマー、ゴムコルク等）
１５０ａで構成され、図５に示されるように、下端は支
持部１１０ｂよりＬ1 だけ突出させた変形可能な自由端
とする。また、支持側と反対面に下端からＬ2 を除いた
部分に弾性摩擦体１５０ａよりも小さな摩擦係数を有す
るシート（ポリエステルフイルム、テフロンフイルム
等）１５０ｂを貼り付ける。このようにして給送量規制
部材１５０の下端と下部ガイド板１１１との間を規制さ
れた量の用紙が通過できる隙間ｄおよび圧力軽減用の空
間１５１を設ける。なお、シート１５０ｂはフエースカ
ール紙において用紙先と給送量規制部材１５０面との引
つ掛かりを防止し、円滑に下方へ用紙２を繰り出すため
に設けてある。Upstream of the separation nip N and on the stopper abutment surface 1
20 m from the separation nipple N, preferably downstream of 03a.
A feed amount regulating member 150 inclined in the same direction as the stopper abutment surface 103a is provided at a position close to or less than m. FIG. 5 is an enlarged configuration diagram of the vicinity of the feed amount regulating member, in which the feed amount regulating member 150 extends from the upper guide plate 110 to the support portion 1.
Flexible elastic friction member adhered on 10b (for example, urethane rubber, thermoplastic elastomer, rubber cork, etc.)
As shown in FIG. 5, the lower end is a deformable free end protruding from the support 110b by L 1 . Further, a sheet (polyester film, Teflon film, etc.) 150b having a friction coefficient smaller than that of the elastic friction body 150a is attached to a portion opposite to the support side except L 2 from the lower end. In this way, the space 151 for reducing pressure and the gap d through which a regulated amount of paper can pass are provided between the lower end of the feed amount regulating member 150 and the lower guide plate 111. The sheet 150b is provided in order to prevent the leading edge of the sheet and the surface of the feed amount regulating member 150 from being caught in the face curl paper and to smoothly feed the sheet 2 downward.
【００２８】また、用紙分離部は図２に示す構造の他、
分離手段として、図６に示す摩擦パツド３０３や図７に
示す摩擦ベルト３０４等、公知の手段を使用できる。The paper separating section has a structure shown in FIG.
Known means such as the friction pad 303 shown in FIG. 6 and the friction belt 304 shown in FIG. 7 can be used as the separating means.
【００２９】次に中間トレイ１０１に所定枚数の用紙２
が収容された後、再給送されるまでの動作を示す。ま
ず、図１ないし図３に示すようにソレノイド１０６のオ
ンにより、ストツパ１０３が搬送路の上方に退避する。
次に図示せぬ駆動源により分離ローラ対１０５がそれぞ
れ回転し、また、クラツチ１１３のオンにより送り出し
ローラ１２０が回転する。ほぼ同時に、ソレノイド１１
６のオンにより加圧板１１５が最上紙上に降下する。Next, a predetermined number of sheets of paper 2 are placed on the intermediate tray 101.
Shows the operation until the sheet is re-fed after being stored. First, as shown in FIGS. 1 to 3, when the solenoid 106 is turned on, the stopper 103 is retracted above the transport path.
Next, the separation roller pair 105 is rotated by a driving source (not shown), and the delivery roller 120 is rotated by turning on the clutch 113. Almost at the same time, the solenoid 11
When the switch 6 is turned on, the pressure plate 115 is lowered onto the uppermost sheet.
【００３０】送り出しローラ１２０の回転により、用紙
束２００全体がニツプ部Ｎの方向に移送される。途中、
給送量規制部材１５０によつて用紙束２００の上層部分
が移送を規制されて停止し、下層部分のみが進行を続
け、ニツプ部Ｎに到達する。そして、フイードローラ１
３０によつて最下紙が給送され、一方、上方の用紙２は
セパレートローラ１３１により進行が阻止される。By rotating the delivery roller 120, the entire sheet bundle 200 is transported in the direction of the nip portion N. On the way
The feeding amount regulating member 150 regulates the transportation of the upper layer portion of the sheet bundle 200 and stops it, and only the lower layer portion continues to reach the nip portion N. And the feed roller 1
The lowermost sheet is fed by 30 while the upper sheet 2 is prevented from moving by the separate roller 131.
【００３１】次に最下紙が搬送ローラ対１３２に達した
後、分離ローラ対１０５の駆動が解除され、フイードロ
ーラ１３０は図示せぬ一方向クラツチにより、用紙２に
連れ回る。また、クラツチ１１３とソレノイド１０６は
適度のタイミングで既にオフしている（なお、送り出し
ローラ１２０は１回転して図２の位置に停止してい
る）。以後、上記の動作を繰り返す。Next, after the bottommost sheet reaches the conveying roller pair 132, the driving of the separation roller pair 105 is released, and the feed roller 130 is rotated around the sheet 2 by a one-way clutch (not shown). Further, the clutch 113 and the solenoid 106 are already turned off at an appropriate timing (note that the delivery roller 120 makes one rotation and is stopped at the position shown in FIG. 2). After that, the above operation is repeated.
【００３２】このようにして、１枚ずつ下層紙が給紙さ
れる。下層紙の最終紙給送時、給送量規制部材１５０に
阻止されていた上層部分の用紙２の一部または全部が下
層紙の最終紙と共に、ニツプ部Ｎ方向に移動してニツプ
部Ｎへ用紙束２００が自動的に補給される。In this way, the lower layer paper is fed sheet by sheet. At the time of feeding the final lower layer paper, part or all of the upper layer sheet 2 blocked by the feed amount regulating member 150 moves in the nip portion N direction to the nip portion N together with the final lower sheet sheet. The sheet bundle 200 is automatically replenished.
【００３３】図８は第２の実施例に係る再給紙装置の要
部構成図である。図において、用紙ストツパ３００はス
テツピングモータ３０１によつてワイヤ３０２を介して
駆動され、積載用紙の増加に従つて送出側（再給紙側）
と反対の方向に所定量だけ段階的に移動制御させること
により、前述の給送量規制部材１５０と同様、再送端形
状を下方が先行するほぼ楔形状として積載収容すること
ができる。FIG. 8 is a schematic view of the essential parts of a re-feeding device according to the second embodiment. In the figure, the sheet stopper 300 is driven by a stepping motor 301 via a wire 302, and as the number of stacked sheets increases, the sheet feeding side (refeeding side)
By gradually controlling the movement in a direction opposite to the above by a predetermined amount, it is possible to stack and store the retransmitting end shape as a substantially wedge shape with the lower side leading, similarly to the feed amount regulating member 150 described above.
【００３４】図９は第３の実施例に係る再給紙装置の要
部構成図である。上部ガイド板１１０の一部が傾斜した
衝合面１１０ｃとなり、積載紙端に楔形状を形成させ
る。FIG. 9 is a block diagram of the essential parts of a refeeding device according to the third embodiment. A part of the upper guide plate 110 becomes an inclined abutting surface 110c, and a wedge shape is formed at the end of the stacked sheets.
【００３５】図１０は本発明による用紙束の給送状態を
示す説明図である。給送量規制部材１５０は弾性変形可
能な摩擦部材であるから、図示のように用紙束２００の
楔効果で押し上げられて変形するので、給送量規制部材
１５０の設置角度θが大きくても、押し付け力Ｓの増加
が小さい。即ち、抵抗力Ｒ1 ，Ｒ2 は小さくなるので用
紙束２００の閉塞が起きにくく、用紙束２００の先端は
容易にニツプ部Ｎに達することができる。FIG. 10 is an explanatory view showing the feeding state of the sheet bundle according to the present invention. Since the feeding amount regulating member 150 is an elastically deformable friction member, the feeding amount regulating member 150 is pushed up and deformed by the wedge effect of the sheet bundle 200 as shown in the drawing, so that even if the installation angle θ of the feeding amount regulating member 150 is large, The increase in pressing force S is small. That is, since the resistances R 1 and R 2 are small, the sheet bundle 200 is unlikely to be closed, and the tip of the sheet bundle 200 can easily reach the nip portion N.
【００３６】[0036]
【発明の効果】請求項１記載の発明によれば、給送量規
制部材を先端が自由端となつた弾性体としたので、先端
ほど用紙進行に対する規制力が弱く、用紙束の先端をさ
らに楔状にずらすことができ、これにより上層部を規制
し下層部のみを通過させることができる。また用紙束先
端に掛かる抵抗力は、給送量規制部材の変形により軽減
されるので用紙束の閉塞現象が防止でき、給紙トラブル
を未然に防止することができる。According to the first aspect of the invention, since the feeding amount regulating member is an elastic body having a free end, the regulating force against the sheet advance is weaker toward the leading end, and the leading end of the sheet bundle is further extended. It can be shifted like a wedge, whereby the upper layer portion can be regulated and only the lower layer portion can be passed. Further, the resistance force applied to the leading end of the sheet bundle is reduced by the deformation of the feed amount regulating member, so that the phenomenon of blockage of the sheet bundle can be prevented and the sheet feeding trouble can be prevented.
【００３７】請求項２記載の発明によれば、給送量規制
部材を分離ニツプの上流の近傍に配置したので、給送量
規制部材が大きく変形する前に用紙束先端が分離ニツプ
に達し、給送量規制部材による抵抗をさらに小さくでき
るので給紙性を安定化でき、また、送り込み力を小さく
することも可能になる。According to the second aspect of the invention, since the feed amount regulating member is arranged in the vicinity of the upstream side of the separation nip, the leading edge of the sheet bundle reaches the separation nip before the feed amount regulating member is largely deformed, Since the resistance of the feed amount regulating member can be further reduced, the paper feeding property can be stabilized, and the feeding force can be reduced.
【００３８】請求項３記載の発明によれば、給送量規制
部材の用紙当接側に摩擦係数の小さいシートを設けたの
で、用紙が特にフエースカール状になつている場合、給
送量規制部材面と用紙先端との引つ掛かりを少なくし
て、円滑に下方へ繰り出すことかできる。According to the third aspect of the invention, since the sheet having a small friction coefficient is provided on the sheet contact side of the sheet feed amount regulating member, the sheet feed amount is regulated particularly when the sheet has a face curl shape. The catching between the member surface and the leading edge of the sheet can be reduced, and the sheet can be smoothly fed downward.
【００３９】請求項４記載の発明によれば、給送量規制
部材の存在によつて押付力が発生し用紙束の紙間に圧力
が生じるが、給送量規制部材の真下に圧力軽減用の空間
を設けることにより、用紙束の閉塞現象が緩和できる。
また、両面装置においては相手側用紙面とこすれ合つて
生じる汚染現象を軽減できる。According to the fourth aspect of the present invention, the pressing force is generated due to the presence of the feed amount regulating member and a pressure is generated between the sheets of the sheet bundle, but the pressure reducing member is provided just below the feed amount regulating member. By providing this space, it is possible to alleviate the blocking phenomenon of the sheet bundle.
Further, in the double-sided device, it is possible to reduce the contamination phenomenon caused by rubbing against the surface of the opposite side sheet.
【図１】第１の実施例に係る再給紙装置の要部構成図で
ある。FIG. 1 is a configuration diagram of a main part of a re-feeding device according to a first embodiment.
【図２】複写機の両面装置の構成図である。FIG. 2 is a configuration diagram of a double-sided device of a copying machine.
【図３】第１の実施例に係る再給紙装置の分離給紙時の
状態を示す要部構成図である。FIG. 3 is a main-part configuration diagram showing a state of the re-feeding device according to the first embodiment at the time of separate feeding.
【図４】用紙束の各種の楔形状を示す説明図である。FIG. 4 is an explanatory diagram showing various wedge shapes of a sheet bundle.
【図５】給送量規制部材近傍の拡大構成図である。FIG. 5 is an enlarged configuration diagram in the vicinity of a feed amount regulating member.
【図６】分離手段の他の例を示す構成図である。FIG. 6 is a configuration diagram showing another example of the separating means.
【図７】分離手段のさらに他の例を示す構成図である。FIG. 7 is a configuration diagram showing still another example of the separating means.
【図８】本発明の第２の実施例に係る再給紙装置の要部
構成図である。FIG. 8 is a configuration diagram of a main part of a re-feeding device according to a second embodiment of the present invention.
【図９】本発明の第３の実施例に係る再給紙装置の要部
構成図である。FIG. 9 is a configuration diagram of a main part of a re-feeding device according to a third embodiment of the present invention.
【図１０】本発明による用紙束の給送状態を示す説明図
である。FIG. 10 is an explanatory diagram showing a sheet bundle feeding state according to the present invention.
【図１１】従来例による用紙束の給送状態を示す説明図
である。FIG. 11 is an explanatory diagram showing a sheet bundle feeding state according to a conventional example.
【図１２】従来例による用紙束の給送状態を示す説明図
である。FIG. 12 is an explanatory diagram showing a sheet bundle feeding state according to a conventional example.
【図１３】従来例による用紙束の給送状態を示す説明図
である。FIG. 13 is an explanatory diagram showing a sheet bundle feeding state according to a conventional example.
２ 用紙 １０１ 中間トレイ １０２ 搬送ローラ １０３ ストツパ １０５ 分離ローラ対 １１１ 下部ガイド板 １２０ 送り出しローラ １３０ フイードローラ １３１ セパレートローラ １５０ 給送量規制部材 １５０ａ 弾性摩擦体 １５０ｂ シート １５１ 空間 2 Paper 101 Intermediate tray 102 Conveying roller 103 Stopper 105 Separation roller pair 111 Lower guide plate 120 Feeding roller 130 Feed roller 131 Separate roller 150 Feed amount regulating member 150a Elastic friction body 150b Sheet 151 Space
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０４Ｎ 1/00 １０８ Ｑ 4226−5Ｃ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location H04N 1/00 108 Q 4226-5C
Claims (4)
みの用紙のもう一方の面に画像を形成すべく、最下紙よ
り順に１枚ずつ画像形成装置本体の作像部に向けて給紙
する再給紙装置において、最下紙より１枚ずつ再給紙す
るための分離ニツプを構成するフイードローラと分離部
材からなる再給紙手段と、用紙先端との衝合面と前記中
間トレイの用紙の積載面とのなす角度を鋭角にして前記
衝合面を上流側に傾斜させ、再給紙に先立つて前記衝合
面が開放されるストツパゲート手段と、前記再給紙手段
の分離ニツプと前記ストツパゲート手段との間の搬送路
上に、前記衝合面と同方向に傾斜し、上方が固定され下
方が自由端となつた弾性摩擦体からなり、自由端と下側
搬送面間が所定量の隙間を持つて配置された給送量規制
部材とを備えたことを特徴とする再給紙装置。1. A sheet is fed one by one from the bottom sheet toward the image forming unit of the image forming apparatus main body in order to form an image on the other side of the one-sided image-formed sheets stacked on the intermediate tray. In the re-feeding device, a re-feeding unit including a feed roller and a separating member that forms a separation nip for re-feeding the sheets one by one from the bottom sheet, an abutting surface of the leading end of the sheet, and a sheet of the intermediate tray. And a stopper gate means for opening the abutting surface prior to re-feeding, a separation nip of the re-feeding means and the aforesaid On the conveying path between the stopper gate means and the stopper surface, the elastic friction member is inclined in the same direction as the abutting surface, the upper part is fixed and the lower part is the free end, and a predetermined amount is provided between the free end and the lower conveying surface. Having a feed amount regulating member arranged with a gap Re-feeding device.
配置したことを特徴とする請求項１記載の再給紙装置。2. The sheet re-feeding device according to claim 1, wherein the feed amount regulating member is arranged in the vicinity of the separation nip.
に、前記給送量規制部材よりも摩擦係数の小さいシート
をさらに設けたことを特徴とする請求項１記載の再給紙
装置。3. The sheet re-feeding device according to claim 1, further comprising a sheet having a smaller coefficient of friction than that of the feeding amount regulating member, which is provided above the sheet feeding side of the feeding amount regulating member. ..
搬送ガイド部材を空間をおいて設けたこと特徴とする請
求項１記載の再給紙装置。4. The sheet re-feeding device according to claim 1, wherein a conveyance guide member is provided so as to face the free end of the feed amount regulating member with a space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3311504A JPH05124774A (en) | 1991-10-31 | 1991-10-31 | Paper sheet re-feed device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3311504A JPH05124774A (en) | 1991-10-31 | 1991-10-31 | Paper sheet re-feed device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05124774A true JPH05124774A (en) | 1993-05-21 |
Family
ID=18018035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3311504A Pending JPH05124774A (en) | 1991-10-31 | 1991-10-31 | Paper sheet re-feed device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05124774A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110248442A1 (en) * | 2010-04-13 | 2011-10-13 | Yoshiyuki Kato | Banknote processing apparatus |
| JP2016179872A (en) * | 2015-03-23 | 2016-10-13 | セイコーエプソン株式会社 | Media transportation device and image reading device |
| JP2018070319A (en) * | 2016-10-27 | 2018-05-10 | ブラザー工業株式会社 | Sheet conveying apparatus |
| DE102018107688A1 (en) * | 2018-03-29 | 2019-10-02 | Inotec Gmbh Organisationssysteme | Rotary body for object collection and object collection device |
| JP2021004106A (en) * | 2019-06-25 | 2021-01-14 | 株式会社プレッシオ | Paper sheet conveying mechanism, inserting device, and gathering/inserting device |
-
1991
- 1991-10-31 JP JP3311504A patent/JPH05124774A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110248442A1 (en) * | 2010-04-13 | 2011-10-13 | Yoshiyuki Kato | Banknote processing apparatus |
| US8302960B2 (en) * | 2010-04-13 | 2012-11-06 | Laurel Precision Machines Co., Ltd. | Banknote processing apparatus with separating and feeding portion |
| JP2016179872A (en) * | 2015-03-23 | 2016-10-13 | セイコーエプソン株式会社 | Media transportation device and image reading device |
| JP2018070319A (en) * | 2016-10-27 | 2018-05-10 | ブラザー工業株式会社 | Sheet conveying apparatus |
| DE102018107688A1 (en) * | 2018-03-29 | 2019-10-02 | Inotec Gmbh Organisationssysteme | Rotary body for object collection and object collection device |
| JP2021004106A (en) * | 2019-06-25 | 2021-01-14 | 株式会社プレッシオ | Paper sheet conveying mechanism, inserting device, and gathering/inserting device |
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