JPH11228009A - Paper ejecting device - Google Patents
Paper ejecting deviceInfo
- Publication number
- JPH11228009A JPH11228009A JP3751998A JP3751998A JPH11228009A JP H11228009 A JPH11228009 A JP H11228009A JP 3751998 A JP3751998 A JP 3751998A JP 3751998 A JP3751998 A JP 3751998A JP H11228009 A JPH11228009 A JP H11228009A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- sheet
- tire rubber
- stopper
- slipping
- 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
- Pile Receivers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、排紙装置に関する
ものであり、特にレーザプリンタ等の電子写真装置から
排出される用紙を積載収容するのに適した排紙装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper discharging device, and more particularly to a paper discharging device suitable for stacking and discharging sheets discharged from an electrophotographic device such as a laser printer.
【０００２】[0002]
【従来の技術】図３により従来技術の排紙装置の構成を
説明する。レーザプリンタ等の電子写真装置によって印
刷が施され排出された印刷済み用紙７は、排紙ローラ対
９によりスタックテーブル８上に排出された後、用紙幅
方向に複数個配置されたゴム等の弾性部材で構成された
用紙搬送パドル４により搬送されて、用紙突当て部材と
なるストッパ１に突き当てられることにより整列する。
パドル４は図示しないモータにより駆動される駆動シャ
フト２により伝達ベルト３を介して駆動される。また、
パドル４は引っ張りコイルバネ１９により吊り下げら
れ、駆動シャフト２を中心に揺動可能に構成されてお
り、用紙表面の幅方向の高さの不均一を吸収して用紙表
面に適切な荷重で当接している。用紙の上面案内用ワイ
ヤ５は、用紙幅方向に複数本配置され、且つシャフト６
に回転自在に支持されることにより用紙の幅方向でのス
タックされた用紙表面の高さの不均一を吸収して用紙上
面に自重により当接することで、用紙７先端のカールに
よるはね上がりを押さえつけながら用紙ガイドとして機
能している。2. Description of the Related Art The configuration of a conventional paper ejection device will be described with reference to FIG. The printed paper 7 printed and discharged by an electrophotographic apparatus such as a laser printer is discharged onto a stack table 8 by a discharge roller pair 9 and then elastically arranged, such as a plurality of rubbers arranged in the width direction of the paper. The sheet is conveyed by a sheet conveying paddle 4 composed of members and is aligned by being hit against a stopper 1 serving as a sheet hitting member.
The paddle 4 is driven via a transmission belt 3 by a drive shaft 2 driven by a motor (not shown). Also,
The paddle 4 is hung by a tension coil spring 19 and is configured to be swingable about the drive shaft 2 so as to absorb unevenness in the height of the paper surface in the width direction and abut against the paper surface with an appropriate load. ing. A plurality of paper upper surface guide wires 5 are arranged in the paper width direction, and a shaft 6
By being supported rotatably on the paper, the unevenness of the height of the stacked paper surface in the width direction of the paper is absorbed, and the paper comes into contact with the upper surface of the paper by its own weight, thereby suppressing the rise due to the curl at the leading end of the paper 7. It functions as a paper guide.
【０００３】[0003]
【発明が解決しようとする課題】上記構成においては、
以下の問題が生じている。 (1) パドル４は用紙７の表面を直接擦ることにより搬
送力を用紙に伝達するため、用紙７上に形成された画像
がパドル４により擦られ、用紙７表面が汚れ、品質の悪
い印刷物が生じてしまう。In the above configuration,
The following problems have occurred. (1) Since the paddle 4 transmits the conveying force to the paper by directly rubbing the surface of the paper 7, the image formed on the paper 7 is rubbed by the paddle 4, and the surface of the paper 7 is stained, resulting in poor quality printed matter. Will happen.
【０００４】(2) パドル４は用紙表面を直接擦るた
め、パドル４に磨耗が発生する。パドル４の磨耗が進行
すると搬送力低下による用紙７の送り込み不足が発生
し、用紙７の整列不良またはスタックジャムを招いてし
まう。(2) Since the paddle 4 directly rubs the paper surface, the paddle 4 is worn. If the wear of the paddle 4 progresses, insufficient feeding of the paper 7 due to a decrease in the conveying force occurs, which causes misalignment of the paper 7 or a stack jam.
【０００５】(3) 電子写真装置では、多くの場合に加
熱加圧方式で用紙にトナー像を定着させるため、用紙７
にはヒートカールが発生する。ヒートカールが特にスタ
ックテーブル８上で上向きになる場合には、用紙７の剛
性によってはワイヤ５の自重では押さえきれなくなり、
図４に示すように用紙７をストッパ１に適切に押しつけ
られなくなる現象が発生する。この現象の結果、用紙７
の整列不良またはスタックジャムになる。これを回避す
るためにワイヤ５の重量を増すことが考えられるが、こ
の場合にはワイヤ５の重量による用紙７の搬送方向のフ
リクションが増加し、搬送力不足による用紙７の送り込
み不足が発生し、用紙７の整列不良またはスタックジャ
ムを招きやすくなる。(3) In an electrophotographic apparatus, in many cases, a toner image is fixed on a sheet by a heating and pressing method.
Causes heat curl. When the heat curl is directed upward particularly on the stack table 8, it cannot be held down by the weight of the wire 5 depending on the rigidity of the paper 7,
As shown in FIG. 4, a phenomenon occurs in which the paper 7 cannot be properly pressed against the stopper 1. As a result of this phenomenon, paper 7
Misalignment or stack jams. In order to avoid this, it is conceivable to increase the weight of the wire 5. In this case, however, friction in the transport direction of the paper 7 due to the weight of the wire 5 increases, resulting in insufficient feeding of the paper 7 due to insufficient transport force. In addition, misalignment of the sheet 7 or stack jam is easily caused.
【０００６】従って、本発明の目的は、印刷面に汚れが
生じない排紙装置を提供することにある。また、本発明
の他の目的は、磨耗による搬送力低下が生じにくく安定
した用紙搬送を行える排紙装置を提供することにある。
さらに、本発明の他の目的は、カールした用紙に対して
も安定したスタックが可能な排紙装置を提供することに
ある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a paper discharge device in which a printed surface is not stained. Another object of the present invention is to provide a paper discharge device that can stably convey a sheet without causing a decrease in conveying force due to wear.
Still another object of the present invention is to provide a sheet discharging device capable of stably stacking curled sheets.
【０００７】[0007]
【課題を解決するための手段】上記目的は、スタックテ
ーブル上に排出された用紙の整列位置を規制するストッ
パ手段と、前記スタックテーブル上面に対し上下方向に
揺動自在に支持され、前記ストッパ手段に向けて用紙を
搬送する用紙搬送手段とを備えた排紙装置において、前
記用紙搬送手段と該用紙搬送手段の回転軸との間に前記
用紙搬送手段と用紙とのスリップを防止するトルクリミ
ット手段を設けることにより達成される。The object of the present invention is to provide a stopper means for regulating an alignment position of a sheet discharged on a stack table, and a stopper means which is supported so as to be vertically swingable with respect to the upper surface of the stack table. And a paper transporting means for transporting the paper toward the paper feeder, wherein a torque limiting means for preventing slippage between the paper transporting means and the paper between the paper transporting means and a rotating shaft of the paper transporting means. This is achieved by providing
【０００８】[0008]
【発明の実施の形態】以下、本発明の実施例を図面を参
照しながら説明する。図１において１０は４節リンク機
構によりストッパ１と用紙搬送部材１１とによって支持
された用紙の上面ガイド部材である。上面ガイド部材１
０は用紙搬送部材１１に連結されており、用紙搬送部材
１１の上下方向の変位に伴って用紙７の上面との隙間ｔ
を保ちながら上下方向に変位する。また、用紙搬送部材
１１は引っ張りコイルバネ１９により用紙７に確実に押
しつけられている。Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 10 denotes a sheet upper surface guide member supported by the stopper 1 and the sheet conveying member 11 by a four-node link mechanism. Upper surface guide member 1
0 is connected to the paper transporting member 11, and a gap t with the upper surface of the paper 7 with the vertical displacement of the paper transporting member 11.
Displaced vertically while maintaining. Further, the sheet conveying member 11 is securely pressed against the sheet 7 by the tension coil spring 19.
【０００９】図２は用紙搬送部材１１の詳細構成を示す
模式図であり、図２(ａ)は用紙搬送部材の側面断面図、
図２(ｂ)は用紙搬送部材の正面断面図である。用紙搬送
部材１１の回転シャフト１３は回転シャフト１３に固定
されたプーリ１２を介して伝達ベルト３により駆動され
ている。耐磨耗性の高いプラスティック材料で構成され
たホイール１５,１６は、回転シャフト１３に対し回転
方向には固定され、且つ軸方向には移動自在となるよう
に保持されている。ホイール１５,１６に挟まれた外周
部には、複数個の耐磨耗性の高いプラスティック材料で
構成されたコロ１７がホイール１５,１６に対して回転
自在に配置されている。コロ１７の外周にはゴム等の用
紙に対して摩擦係数の高い材料で構成されたタイヤラバ
ー１８が設けられている。FIG. 2 is a schematic view showing a detailed configuration of the sheet conveying member 11, and FIG. 2A is a side sectional view of the sheet conveying member.
FIG. 2B is a front sectional view of the sheet conveying member. The rotating shaft 13 of the sheet conveying member 11 is driven by the transmission belt 3 via a pulley 12 fixed to the rotating shaft 13. Wheels 15, 16 made of a plastic material having high wear resistance are fixed to the rotating shaft 13 in the rotating direction and are held so as to be movable in the axial direction. A plurality of rollers 17 made of a highly abrasion-resistant plastic material are rotatably disposed on the outer peripheral portion between the wheels 15 and 16 with respect to the wheels 15 and 16. A tire rubber 18 made of a material having a high coefficient of friction with paper such as rubber is provided on the outer periphery of the roller 17.
【００１０】ホイール１５,１６は回転シャフト１３の
一方向に圧縮コイルバネ１４により押しつけられてお
り、この押しつけ力によりコロ１７を挾み込み保持して
いる。ここで、タイヤラバー１８の外半径をｒ、コロ１
７とホイール１５,１６との摺擦面の平均半径をｒ1、コ
ロ１７の回転軸半径をｒ2、圧縮コイルバネ１４による
コロ１７を挟み込む力をＳ、コロ１７の員数をｎ、引っ
張りコイルバネ１９による用紙搬送部材１１を用紙７に
押しつける力をＰ、ホイール１５,１６とコロ１７の間
の摩擦係数をμｗ、タイヤラバー１８と用紙７の間の摩
擦係数をμｒ、用紙７同士の摩擦係数をμｐとすると、
用紙７とタイヤラバー１８が摩擦したときに用紙７がタ
イヤラバー１８とともにコロ１７を回転させる力：Ｆｏ
は下記(1)式となる。 Ｆｏ＝（２・ｒ1・Ｓ／ｎ＋ｒ2・Ｐ）・μｗ／ｒ … (1) また、タイヤラバー１８が用紙７に与える搬送力：Ｆｒ
は下記(2)式となる。 Ｆｒ＝μｒ・Ｐ … (2) 用紙７同士の摩擦力により生じる搬送抵抗：Ｆｐは下記
(3)式となる。 Ｆｐ＝μｐ・Ｐ … (3) タイヤラバー１８が用紙７とスリップせず、且つタイヤ
ラバーが用紙７同士の摩擦による搬送抵抗に打ち勝って
用紙７を搬送する条件は下記(4)式及び(5)式となる。 Ｆｏ＜Ｆｒ … (4)：タイヤラバーが用紙とスリップ
しない条件 Ｆｏ＞Ｆｐ … (5)：用紙を搬送できる条件 上記(4)式および(5)式を満足する系においては、タイヤ
ラバー１８と用紙７はスリップすることなく用紙７を搬
送でき、用紙７がストッパ１に突き当たった後には、タ
イヤラバー１８は用紙７上を転がることで、スリップを
防止できる。The wheels 15, 16 are pressed by a compression coil spring 14 in one direction of a rotating shaft 13, and the rollers 17 are sandwiched and held by the pressing force. Here, the outer radius of the tire rubber 18 is r, and the roller 1 is
The average radius of the rubbing surface between the wheel 7 and the wheels 15 and 16 is r 1 , the radius of the rotating shaft of the roller 17 is r 2 , the force of sandwiching the roller 17 by the compression coil spring 14 is S, the number of rollers 17 is n, and the tension coil spring 19 Is the force that presses the sheet conveying member 11 against the sheet 7, the coefficient of friction between the wheels 15, 16 and the roller 17 is μw, the coefficient of friction between the tire rubber 18 and the sheet 7 is μr, and the coefficient of friction between the sheets 7 is μp
A force that causes the paper 7 to rotate the roller 17 together with the tire rubber 18 when the paper 7 and the tire rubber 18 rub against each other: Fo
Becomes the following equation (1). Fo = (2 · r 1 · S / n + r 2 · P) · μw / r (1) Further, the conveyance force that the tire rubber 18 gives to the paper 7: Fr
Is given by the following equation (2). Fr = μr · P (2) Conveyance resistance generated by frictional force between papers 7: Fp is as follows:
Equation (3) is obtained. Fp = μp · P (3) The conditions under which the tire rubber 18 does not slip with the paper 7 and the tire rubber overcomes the transport resistance due to friction between the papers 7 to transport the paper 7 are expressed by the following equations (4) and (5). ) Fo <Fr (4): Conditions under which the tire rubber does not slip on the paper Fo> Fp (5): Conditions under which the paper can be transported In a system satisfying the above equations (4) and (5), the tire rubber 18 and The paper 7 can be conveyed without slipping, and after the paper 7 collides with the stopper 1, the tire rubber 18 rolls on the paper 7 to prevent slippage.
【００１１】上記構成の用紙搬送部材１１には、ホイー
ル１５,１６の外周部に複数のタイヤラバー１８を保持
したコロ１７が配置されているため、ホイール１５,１
６の回転に伴ってタイヤラバー１８と用紙７の接点半径
が変化する。用紙搬送部材１１は引っ張りコイルバネ１
９により常に用紙７に押しつけられているため、前記接
点半径の変化に伴って用紙搬送部材１１全体は上下に運
動する。この結果、用紙搬送部材１１に連結された図１
の上面ガイド部材１０もまた上下に運動する。上面ガイ
ド部材１０の上下運動により、スタックされた用紙７の
ストッパ１側先端の上向きのカールを押しつぶしてなら
すことができる。Since the rollers 17 holding a plurality of tire rubbers 18 are arranged on the outer periphery of the wheels 15 and 16 in the paper transporting member 11 having the above-described structure, the wheels 15 and 1 are provided.
The radius of contact between the tire rubber 18 and the paper 7 changes as the wheel 6 rotates. The paper conveying member 11 is a tension coil spring 1
9, the entire sheet transport member 11 moves up and down with the change in the contact radius. As a result, FIG.
Upper surface guide member 10 also moves up and down. By the vertical movement of the upper surface guide member 10, the upward curl of the end of the stacked sheets 7 on the stopper 1 side can be crushed and smoothed.
【００１２】[0012]
【発明の効果】以上述べたように本発明によれば、印刷
面に汚れが生じない排紙装置を提供することができる。
また、磨耗による搬送力低下が生じにくく安定した用紙
搬送を行える排紙装置を提供することができる。さら
に、カールした用紙に対しても安定したスタックが可能
な排紙装置を提供することができる。As described above, according to the present invention, it is possible to provide a paper discharge device that does not cause stains on a printing surface.
In addition, it is possible to provide a paper discharge device that is capable of performing stable paper conveyance in which the conveyance force hardly decreases due to wear. Further, it is possible to provide a sheet discharging device capable of stably stacking even curled sheets.
【図１】本発明の排紙装置の一実施例を示す概略正面
図。FIG. 1 is a schematic front view showing one embodiment of a paper discharge device of the present invention.
【図２】本発明の排紙装置の用紙搬送部材の詳細構成を
示す説明図。FIG. 2 is an explanatory diagram showing a detailed configuration of a sheet conveying member of the sheet discharging device of the present invention.
【図３】従来の排紙装置を示す概略正面図。FIG. 3 is a schematic front view showing a conventional paper discharge device.
【図４】従来の排紙装置を示す概略正面図。FIG. 4 is a schematic front view showing a conventional paper ejection device.
１…ストッパ、２…駆動シャフト、３…伝達ベルト、４
…パドル、５…ワイヤ、６…シャフト、７…用紙、８…
スタックテーブル、９…排紙ローラ対、１０…上面ガイ
ド部材、１１…用紙搬送部材、１２…プーリ、１３…回
転シャフト、１４…圧縮コイルバネ、１５,１６…ホイ
ール、１７…コロ、１８…タイヤラバー、１９…引っ張
りコイルバネ。DESCRIPTION OF SYMBOLS 1 ... Stopper 2 ... Drive shaft 3 ... Transmission belt 4
... paddle, 5 ... wire, 6 ... shaft, 7 ... paper, 8 ...
Stack table, 9: paper discharge roller pair, 10: upper surface guide member, 11: paper transport member, 12: pulley, 13: rotary shaft, 14: compression coil spring, 15, 16: wheel, 17: roller, 18: tire rubber , 19 ... Tension coil spring.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 白石 竜也 茨城県ひたちなか市武田1060番地 日立工 機株式会社内 (72)発明者 竹下 雅美 茨城県ひたちなか市武田1060番地 日立工 機株式エンジニアリング株式会社内 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Tatsuya Shiraishi 1060 Takeda, Hitachinaka-shi, Ibaraki Pref.Hitachi Koki Co., Ltd.
Claims (3)
列位置を規制するストッパ手段と、前記スタックテーブ
ル上面に対し上下方向に揺動自在に支持され、前記スト
ッパ手段に向けて用紙を搬送する用紙搬送手段とを備え
た排紙装置において、前記用紙搬送手段と該用紙搬送手
段の回転軸との間に前記用紙搬送手段と用紙とのスリッ
プを防止するトルクリミット手段を設けたことを特徴と
する排紙装置。A stopper means for regulating an alignment position of a sheet discharged onto a stack table, and a sheet which is supported so as to be vertically swingable with respect to an upper surface of the stack table and conveys a sheet toward the stopper means. In a paper discharge device provided with a conveying means, a torque limit means for preventing a slip between the paper conveying means and the paper is provided between the paper conveying means and a rotating shaft of the paper conveying means. Paper ejection device.
上下方向に変位可能な用紙上面ガイド部材を、前記スト
ッパ手段と前記用紙搬送手段とにより支持させて設けた
ことを特徴とする請求項１記載の排紙装置。2. A paper upper surface guide member capable of being vertically displaced in accordance with the vertical displacement of said paper transport means is provided by being supported by said stopper means and said paper transport means. 2. The paper discharging device according to 1.
向に複数のコロを有する用紙搬送部材を有することを特
徴とする請求項１または２記載の排紙装置。3. The sheet discharging device according to claim 1, wherein said sheet conveying means has a sheet conveying member having a plurality of rollers in a circumferential direction of the wheel member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3751998A JPH11228009A (en) | 1998-02-19 | 1998-02-19 | Paper ejecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3751998A JPH11228009A (en) | 1998-02-19 | 1998-02-19 | Paper ejecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11228009A true JPH11228009A (en) | 1999-08-24 |
Family
ID=12499801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3751998A Pending JPH11228009A (en) | 1998-02-19 | 1998-02-19 | Paper ejecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11228009A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8128086B2 (en) | 2006-09-06 | 2012-03-06 | Canon Kabushiki Kaisha | Sheet stacking apparatus and image forming apparatus |
-
1998
- 1998-02-19 JP JP3751998A patent/JPH11228009A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8128086B2 (en) | 2006-09-06 | 2012-03-06 | Canon Kabushiki Kaisha | Sheet stacking apparatus and image forming apparatus |
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