JPH03143866A - Discharged paper stacking tray in image forming device - Google Patents

Discharged paper stacking tray in image forming device

Info

Publication number
JPH03143866A
JPH03143866A JP1280354A JP28035489A JPH03143866A JP H03143866 A JPH03143866 A JP H03143866A JP 1280354 A JP1280354 A JP 1280354A JP 28035489 A JP28035489 A JP 28035489A JP H03143866 A JPH03143866 A JP H03143866A
Authority
JP
Japan
Prior art keywords
sheet
paper
stacking tray
sheets
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.)
Granted
Application number
JP1280354A
Other languages
Japanese (ja)
Other versions
JP2548406B2 (en
Inventor
Akiyoshi Torikai
鳥飼 昭嘉
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 JP1280354A priority Critical patent/JP2548406B2/en
Publication of JPH03143866A publication Critical patent/JPH03143866A/en
Application granted granted Critical
Publication of JP2548406B2 publication Critical patent/JP2548406B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00Parts for transporting or guiding the handled material
    • B65H2404/10Rollers
    • B65H2404/15Roller assembly, particular roller arrangement
    • B65H2404/152Arrangement of roller on a movable frame
    • B65H2404/1521Arrangement of roller on a movable frame rotating, pivoting or oscillating around an axis, e.g. parallel to the roller axis

Landscapes

  • Paper Feeding For Electrophotography (AREA)
  • Pile Receivers (AREA)

Abstract

PURPOSE:To align sheets stacked on a discharged paper tray so as to enhance the storage property of the tray by providing a guide member along which the rear end of a sheet falls immediately after the rear end is detached from a paper discharging means. CONSTITUTION:Sheets P on which images have been formed by an image forming device 1 are discharged to a discharged paper stacking tray 16 by a paper discharging means 15. In this case, immediately after the sheets P are detached from the paper discharging means 15, the rear end of each of the sheets P falls along a guide member 16a onto the discharge paper stacking tray 16. Because the guide member 16a is generally slanted, the sheets P that fall along the rear end of the guide member 16a are slightly pressed forward by the guide member 16a and are adjusted and stacked on the discharged paper stacking tray 16. The sheets P stacked on the discharged paper stacking tray 16 are thus aligned.

Description

【発明の詳細な説明】 (イ)産業上の利用分野 本発明はレーザビームプリンタ、複写機等の画像形成装
置における排紙積載トレイに係り、詳しくは排紙積載ト
レイの構造に関する。
DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a discharge paper stacking tray in an image forming apparatus such as a laser beam printer or a copying machine, and more particularly to the structure of the discharge paper stacking tray.

(D)  従来の技術 従来、自動両面印字機能を有するプリンタ等では、多量
のシートに画像を形成する必要があるので、その排紙積
載トレイと排紙手段との落差が大きく、トレイも広く形
成されて、排紙手段からトレイ上へシートを自由落下さ
せていた。
(D) Conventional technology Conventionally, in printers with automatic duplex printing function, it is necessary to form images on a large number of sheets, so the height difference between the paper output stacking tray and the paper ejection means is large, and the tray is also formed wide. The sheets were then allowed to fall freely from the paper ejection means onto the tray.

(ハ)発明か解決しようとする課題 しかしながら、上記のような構成の場合、排紙手段から
落差の大きいトレイ上へ落下するシートは広いトレイ上
での揃いが悪く、前後、左右共に、20〜30mmもは
み出すものがあり、トレイ上にばらばらに積載されてい
るので、製本する等の場合、更に多大の手間を費やして
整合しなければならないという欠点があった。
(c) Problems to be Solved by the Invention However, in the case of the above configuration, the sheets falling from the paper ejecting means onto the tray with a large height are not aligned on the wide tray, and the sheets fall from 20 to Some of the sheets protrude by as much as 30 mm, and since they are stacked on the tray in a disjointed manner, there is a disadvantage that when binding a book, etc., it is necessary to spend a great deal of time and effort to align them.

そこで、本発明は、シートが落下するときのガイド部材
を設けて、シート積載性を向上できる排紙積載トレイを
提供することを目的とするものである。
SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a discharged paper stacking tray that is provided with a guide member for when sheets fall, thereby improving sheet stacking performance.

(ニ)課題を解決するための手段 本発明は、上述の事情に鑑みてなされたもの形成装置(
1)の排紙手段(15)から排出さるシート(P)を積
載する排紙積載トレイ(6)において、前記排紙手段(
15)から前記−ト(P)の後端が外れた直後に前記シ
ー(P)の後端が沿いながら落下するガイド部(16a
)を設けたことを特徴とする。
(d) Means for Solving the Problems The present invention has been made in view of the above-mentioned circumstances.
In the discharge paper stacking tray (6) on which the sheets (P) discharged from the paper discharge means (15) of 1) are stacked, the paper discharge means (
Immediately after the rear end of the sheet (P) comes off from the guide portion (16a), the rear end of the sheet (P) falls along
).

また、前記ガーイド部材(lea)の表面形が、前記シ
ート(P)の落下時に、該シー(P)の先端が前記排紙
積載トレイ(16)面着地する位置(T)の近傍または
該位置よりもい位置を中心とする円弧面または該円弧面
に近の平面よりなることを特徴とする。
Further, the surface shape of the guide member (lea) is in the vicinity of or at the position (T) where the tip of the sheet (P) lands on the discharge sheet stacking tray (16) surface when the sheet (P) falls. It is characterized by being composed of a circular arc surface centered at a position above the arc surface, or a plane near the circular arc surface.

(ネ)作用 以上の構成に基づき、前記画像形成装置(1で画像形成
を終えた前記シート(P)を前記排手段(15)により
前記排紙積載トレイ(16に排紙する。この際、該シー
ト(P)が前記排紙手段(15)から外れた直後に、前
記シート(P)の後端が前記ガイド部材(16a)に沿
いながら前記排紙積載トレイ(16〉上に落下する。
(f) Function Based on the above configuration, the sheet (P) on which image formation has been completed in the image forming apparatus (1) is discharged to the discharge sheet stacking tray (16) by the discharge means (15). At this time, Immediately after the sheet (P) comes off the paper discharge means (15), the rear end of the sheet (P) falls onto the discharge paper stacking tray (16>) while following the guide member (16a).

また、前記ガイド部材(18a)は一般に傾斜している
ので、該ガイド部材(16a)後端を沿わせて落下する
前記シート(P)はガイド部材(18a、)により前方
に若干押し出され、整列されて、前記排紙積載トレイ(
16〉上に積載される。
Further, since the guide member (18a) is generally inclined, the sheet (P) falling along the rear end of the guide member (16a) is pushed forward slightly by the guide member (18a,) and aligned. and the output paper stacking tray (
16〉It is loaded on top.

なお、前記カッコ内の符号は例示であり、何等構成を限
定するものではない。
Note that the reference numerals in parentheses are just examples and do not limit the configuration in any way.

(へ)実施例 以下、図面に沿って、本発明の詳細な説明する。(f) Example Hereinafter, the present invention will be described in detail with reference to the drawings.

第1図において、1はレーザビームプリンタであり、図
上右側上部にスキャナユニット2が設けられ、その光線
がカートリッジ内に収納された画像形成部3の感光ドラ
ム3aを照射するようになっている。
In FIG. 1, numeral 1 is a laser beam printer, and a scanner unit 2 is provided at the upper right side of the figure, and its light beams illuminate a photosensitive drum 3a of an image forming section 3 housed in a cartridge. .

また、右側部にシートPを収納したカセット4.5が装
着され、カセット4.5に給紙及び1送防止ローラ6.
7が夫々設けられ、これ等ローラ6.7から夫々のガイ
ド8,9を経てシートPがレジストローラ10に搬送さ
れるようになっている。そして、前記感光ドラム3aと
、この感光ドラム3aに対向する転写ローラ11とが配
設され、ついでガイド板12を介して、定着器13がプ
リンタ1の左側部に配設されている。
Further, a cassette 4.5 containing sheets P is installed on the right side, and a paper feeding and one-feed prevention roller 6.
7 are provided respectively, and the sheet P is conveyed from these rollers 6 and 7 to the registration rollers 10 via respective guides 8 and 9. The photosensitive drum 3a and a transfer roller 11 facing the photosensitive drum 3a are disposed, and then a fixing device 13 is disposed on the left side of the printer 1 with a guide plate 12 in between.

また、定着器13の左側に近接してフラッパ14が設け
られ、このフラッパ14により上方または下方にガイド
が設けられており、上方のガイド端に排紙ローラ15か
設けられていて、続いて、プリンタ1上面に排紙トレイ
16が形成されていが設けられている。
Further, a flapper 14 is provided adjacent to the left side of the fixing device 13, a guide is provided above or below by this flapper 14, and a paper ejection roller 15 is provided at the upper guide end. A paper discharge tray 16 is provided on the top surface of the printer 1.

また、この搬送ローラ18に続いて、プリンタ1の左側
底部に再給紙ガイド19が設けられ、このガイド19の
下漕嫡に搬狽ローラ20が設けられ、このローラ20に
近接してフラッパ21が設けられている。
Further, following this conveyance roller 18, a paper refeeding guide 19 is provided at the bottom left side of the printer 1, a conveyance roller 20 is provided at the bottom of this guide 19, and a flapper 21 is provided adjacent to this roller 20. is provided.

また、フラッパ21の右側のプリンタ1の底部にシート
Pの幅方向を規制する搬送路22が設けられると共に、
この搬送路12上でシートPをスイッチバックさせる正
逆転ローラ23が設けられている。そして、前記フラッ
パ21から上方の前記レジストローラlOヘシートPを
導くガイド24とそのガイド24の上部に搬送ローラ2
5とが設けられている。
Further, a conveyance path 22 for regulating the width direction of the sheet P is provided at the bottom of the printer 1 on the right side of the flapper 21, and
A forward/reverse roller 23 for switching back the sheet P on this conveyance path 12 is provided. A guide 24 that guides the sheet P from the flapper 21 to the registration roller lO above, and a conveyance roller 2 above the guide 24.
5 is provided.

そして、排紙トレイ16上について更に詳細に説明する
Next, the information on the paper discharge tray 16 will be explained in more detail.

この排紙トレイ16に排紙されるシートPの先端が最初
に着地する着地点をTとしたとき、この着地点Tから排
紙ローラ15までの距離をRとすると、トレイ16の背
部の規制板leaが半径Rまたはそれ以上の半径の円弧
面またはこれに近似の平面に形成されている。
If T is the landing point where the leading edge of the sheet P ejected to this ejecting tray 16 first lands, and if the distance from this landing point T to the ejecting roller 15 is R, then the regulation on the back of the tray 16 is The plate lea is formed into a circular arc surface with a radius R or greater, or a plane similar to this.

かくすることにより、この規制板18aは斜前本実施例
は前記したように構成されているので、カセット4また
は5から給紙・重送防止ローラ6または7により一枚づ
つ給送されたシートPはレジストローラ10により斜行
規制され、感光ドラム3aに一同調して、画像がシート
Pに転写され、定着器13により定着され、フラッパ1
4に導かれる。
By doing so, this regulating plate 18a is tilted.Since this embodiment is configured as described above, the sheets fed one by one from the cassette 4 or 5 by the sheet feeding/double feeding prevention roller 6 or 7 P is regulated by registration rollers 10, and the image is transferred onto the sheet P in synchronization with the photosensitive drum 3a, fixed by the fixing device 13, and then transferred to the flapper 1.
4.

ここにおいて、シートPの上面のみに画像形成を行なう
場合には、フラッパ14が実線表示の姿勢において、矢
印C方向に搬送されて、排紙ローラ15により、排紙ト
レイ16に排出される。
Here, when image formation is performed only on the upper surface of the sheet P, the flapper 14 is conveyed in the direction of arrow C in the posture shown by the solid line, and is discharged onto the paper discharge tray 16 by the paper discharge roller 15.

また、シートPの裏面に画像形成を行なう場合には、フ
ラッパ14が破線表示の状態において、矢印り方向に搬
送され、湾曲しているガイド17を経て搬送ローラ18
により再給紙ガイド19に搬入され、−時停止した後、
フラッパ21が破線表示の状態において、搬送ローラ2
0により搬送路22に搬入され、ここにおいてシートP
の幅方向の規制を受けた後、正逆転ローラ23の逆転に
よりスイッチバックして、フラッパ21が実線表示の状
態において、上方へガイド24に導かれ、更に搬送ロー
ラ25によりガイド9に合流して、レジストローラ10
に搬送され、レジストローラ10によりシートPの裏面
に前記のように画像か感光ドラム3aから転写され、定
着器13により定着され、フラッパ■4が実線の姿勢に
おいて矢印C方向に搬送され、排紙ローラ15により排
紙トレイ16上に排出されて積載される。
In addition, when forming an image on the back side of the sheet P, the flapper 14 is conveyed in the direction of the arrow in the state indicated by the broken line, and passes through the curved guide 17 to the conveyance roller 18.
After being carried into the refeeding guide 19 and stopping at -,
When the flapper 21 is displayed as a broken line, the conveyance roller 2
0 into the conveyance path 22, where the sheet P
After being regulated in the width direction, the flapper 21 is switched back by the reverse rotation of the forward/reverse roller 23, and the flapper 21 is guided upward to the guide 24 with a solid line displayed, and then joined to the guide 9 by the conveyance roller 25. , registration roller 10
The image is transferred from the photosensitive drum 3a to the back surface of the sheet P by the registration rollers 10 as described above, is fixed by the fixing device 13, and the flapper 4 is conveyed in the direction of arrow C in the position shown by the solid line, and the sheet is ejected. The paper is discharged onto the paper discharge tray 16 by the rollers 15 and stacked thereon.

更に、排紙トレイ16について、詳述すると、排紙ロー
ラ15から排出するシートPはその先端が先ず着地点T
の近傍に着地し、このシートPの後端は少し斜め前方を
向く規制板16aにより押し出されながら整列されて、
−枚づつ収納される。
Further, to explain the paper ejection tray 16 in detail, the leading edge of the sheet P ejected from the paper ejection roller 15 first reaches the landing point T.
The rear end of the sheet P is pushed out and aligned by the regulating plate 16a facing slightly diagonally forward.
- Stored one by one.

次に他の実施例を第2図及び第3図を参照して説明する
Next, another embodiment will be described with reference to FIGS. 2 and 3.

本実施例においては排紙ローラ15の上方近傍の装置本
体1aに、紙揃えアーム26が回動自在に枢支され、こ
のアーム26の先端に余り重くない紙押えローラ26a
が回動自在に取付けられて、排紙されたシートPの先端
部を押圧するようになっている。
In this embodiment, a paper aligning arm 26 is rotatably supported on the apparatus main body 1a near the upper side of the paper ejection roller 15, and a paper pressing roller 26a, which is not too heavy, is attached to the tip of this arm 26.
is rotatably attached to press the leading end of the discharged sheet P.

かくすることにより、シートPが排紙ローラ15から排
出されると、このシートPの先端は、紙押えローラ26
に軽く押えられてこのローラ26a下を搬送され、シー
トPの後端は規制板16aに沿って自由落下する。即ち
、シートPの先端及び後端か固定されてトレイ16上に
積載されるので、装置本体1aが振動していても、排紙
トレイ16上にシートPは整然と積載される。
By doing this, when the sheet P is discharged from the paper discharge roller 15, the leading edge of the sheet P is pressed against the paper presser roller 26.
The sheet P is conveyed under the roller 26a while being lightly pressed by the sheet P, and the rear end of the sheet P falls freely along the regulation plate 16a. That is, since the leading and trailing ends of the sheets P are fixed and stacked on the tray 16, the sheets P are stacked neatly on the paper discharge tray 16 even if the main body 1a of the apparatus vibrates.

(ト)発明の効果 以上、説明したように、本発明によると、排紙されたシ
ートの後端か前記ガイド部材に沿いながら、前記排紙ト
レイ上に落下するのて、該排紙トレイ上に積載された該
シートは整列し、収納性を向上できる。
(G) Effects of the Invention As explained above, according to the present invention, the trailing edge of the ejected sheet falls onto the paper ejection tray while following the guide member, and the rear end of the ejected sheet falls onto the paper ejection tray. The sheets stacked on the tray are aligned and can be stored more easily.

また、前記ガイド部材を該シートの先端が前記排紙トレ
イへの着地点またはそれよりも遠い点を中心とする円弧
面または該円弧面に近似の平面に形成することによって
は、該ガイド部材が落下中のシート後端を少し押し出す
ことにより、載置された該シートの整列性を更に向上す
るため、シート収納性を更に向上できる。
Furthermore, by forming the guide member into a circular arc surface whose center is the point where the leading end of the sheet lands on the paper ejection tray or a point further away from the discharge tray, or a plane similar to the arc surface, the guide member can be By slightly pushing out the trailing edge of the falling sheet, the alignment of the placed sheets is further improved, so that sheet storage performance can be further improved.

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

第1図は本発明の実施例を示す縦断側面図、第2図は他
の実施例の要部を示す拡大断面側面図、第3図は第2図
の平面図である。 1・・・画像形成装置(レーザビームプリンタ)、15
・・・排紙手段(排紙ローラ)   16・・・排紙積
載トレイ(排紙トレイ)    16a・・・ガイド部
材(規制板)   P・・・シートT・・・着地する位
置(着地点)
FIG. 1 is a longitudinal sectional side view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional side view showing essential parts of another embodiment, and FIG. 3 is a plan view of FIG. 2. 1... Image forming device (laser beam printer), 15
...Sheet ejection means (paper ejection roller) 16...Ejected paper stacking tray (paper ejection tray) 16a... Guide member (regulating plate) P... Sheet T... Landing position (landing point)

Claims (1)

【特許請求の範囲】 1、画像形成装置において画像形成を終えて、該画像形
成装置の排紙手段から排出されるシートを積載する排紙
積載トレイにおいて、 前記排紙手段から前記シートの後端が外れた直後に該シ
ートの後端が沿いながら落下するガイド部材を設けたこ
とを特徴とする画像形成装置における排紙積載トレイ。 2、前記ガイド部材の表面形状が、前記シートの落下時
に、該シートの先端が前記排紙積載トレイ面に着地する
位置の近傍または該位置よりも遠い位置を中心とする円
弧面または該円弧面に近似の平面よりなる請求1記載の
画像形成装置における排紙積載トレイ。
[Scope of Claims] 1. In a discharge paper stacking tray on which sheets discharged from a paper discharge means of the image forming apparatus are stacked after image formation has been completed in an image forming apparatus, a rear end of the sheet from the paper discharge means 1. A discharged sheet stacking tray for an image forming apparatus, characterized in that a guide member is provided along which the trailing edge of the sheet falls immediately after the sheet is removed. 2. The surface shape of the guide member is an arcuate surface whose center is near a position where the leading edge of the sheet lands on the discharged sheet stacking tray surface when the sheet falls, or a position further from the position. 2. The discharge paper stacking tray in an image forming apparatus according to claim 1, which has a flat surface approximately similar to .
JP1280354A 1989-10-27 1989-10-27 Image forming device Expired - Fee Related JP2548406B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1280354A JP2548406B2 (en) 1989-10-27 1989-10-27 Image forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1280354A JP2548406B2 (en) 1989-10-27 1989-10-27 Image forming device

Publications (2)

Publication Number Publication Date
JPH03143866A true JPH03143866A (en) 1991-06-19
JP2548406B2 JP2548406B2 (en) 1996-10-30

Family

ID=17623836

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1280354A Expired - Fee Related JP2548406B2 (en) 1989-10-27 1989-10-27 Image forming device

Country Status (1)

Country Link
JP (1) JP2548406B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007302385A (en) * 2006-05-10 2007-11-22 Sharp Corp Paper discharge structure and image forming device using it
JP2016145104A (en) * 2015-02-09 2016-08-12 三菱重工印刷紙工機械株式会社 Front stop device, sheet stacking device, counter ejector, and box-making machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS648178A (en) * 1987-06-29 1989-01-12 Toshiba Corp Image forming device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS648178A (en) * 1987-06-29 1989-01-12 Toshiba Corp Image forming device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007302385A (en) * 2006-05-10 2007-11-22 Sharp Corp Paper discharge structure and image forming device using it
JP2016145104A (en) * 2015-02-09 2016-08-12 三菱重工印刷紙工機械株式会社 Front stop device, sheet stacking device, counter ejector, and box-making machine
WO2016129348A1 (en) * 2015-02-09 2016-08-18 三菱重工印刷紙工機械株式会社 Front stopping device, sheet layering device, counter-ejector, and carton former
KR20170102539A (en) * 2015-02-09 2017-09-11 미츠비시주코 인사츠시코키카이 가부시키가이샤 Front stop device, seat hitting device, counter ejector and demolisher
CN107207175A (en) * 2015-02-09 2017-09-26 三菱重工印刷纸工机械有限公司 Preceding stop device, sheet material stacking apparatus, counter ejector and box machine
CN107207175B (en) * 2015-02-09 2020-04-28 三菱重工机械***株式会社 Front stop device, sheet stacking device, counter ejector, and box making machine

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