JPH05139629A - Image forming device equipped with intermediate tray - Google Patents

Image forming device equipped with intermediate tray

Info

Publication number
JPH05139629A
JPH05139629A JP3301872A JP30187291A JPH05139629A JP H05139629 A JPH05139629 A JP H05139629A JP 3301872 A JP3301872 A JP 3301872A JP 30187291 A JP30187291 A JP 30187291A JP H05139629 A JPH05139629 A JP H05139629A
Authority
JP
Japan
Prior art keywords
tray
sheet
regulating
sheets
image forming
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
JP3301872A
Other languages
Japanese (ja)
Inventor
Toshiyuki Nagano
敏幸 長野
Original Assignee
Canon Inc
キヤノン株式会社
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, キヤノン株式会社 filed Critical Canon Inc
Priority to JP3301872A priority Critical patent/JPH05139629A/en
Publication of JPH05139629A publication Critical patent/JPH05139629A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To cope with sheets of various sizes, especially deal with sheets of small sizes, and reduce the height of an intermediate tray as the result of abolition of a flapper, by providing a means for regulating the rear end of sheets loaded on the intermediate tray, and making it possible for the rear end regulating means to move in the direction of conveying the sheets. CONSTITUTION:A rear end regulating tray 2 is held on the bottom plate 1 of an intermediate tray so that it is guided by grooves, etc., so as to be slidable in the direction of feed. When a sheet, the first face of which has been copied, is landed on the rear end regulating tray 2, a gathering rollers 5 above the rear end regulating tray 2 is rotated in the direction of the arrow E to allow the sheet to enter the tray 2 and to be dropped, and gathers a sheet S1 in the direction of the arrow N and conveys the sheet until it abuts on a rear face 14 of the rear end regulating tray 2. The gathering rollers 5 are made of a material whose conveying force is relatively weak, such as sponge. When a sheet bundle of F pieces is loaded on the rear regulating tray 2, the tray is moved from 2a to 2b to stand by again at the paper feed position.

Description

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

【0001】[0001]

【産業上の利用分野】本発明は中間トレイを備える画像
形成装置に係り、詳しくは一度画像形成したシートを再
給紙して再び画像を形成するためにシートを一時保留す
る中間トレイを備える画像形成装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus provided with an intermediate tray, and more particularly to an image provided with an intermediate tray for temporarily re-feeding an image-formed sheet and temporarily holding the sheet for forming an image again. Forming apparatus

【0002】[0002]

【従来の技術】一般に、画像形成装置においては、多重
コピーや両面コピーを行なう場合には、一度コピーした
シートを装置内の中間トレイに保留し、それを再給紙し
て同じシート面又は裏面に画像を形成して多重コピーや
両面コピーを得るようになっている。
2. Description of the Related Art Generally, in an image forming apparatus, when performing multiplex copying or double-sided copying, a sheet once copied is held in an intermediate tray in the apparatus and re-fed to feed the same sheet surface or back surface. It is designed to form images on multiple copies or double-sided copies.

【0003】即ち、画像形成装置は、図4に示すよう
に、給紙部101に複数の大きさの異なるシートを収納
したカセット容器102,103が着脱自在に装着され
ており、これらのカセット容器102,103のうち1
つからシートが給紙される。そして、このシートに、転
写部104において感光ドラム105よりトナー像が転
写され、定着部106においてトナー像が定着される。
片面のみのコピーの場合にはフラッパー107は図にお
いて矢印イの方へ回動し、シートは装置外へ搬出される
が、多重コピー、両面コピーの場合にはこのフラッパー
107は図の位置にあり、シートは下方へ搬送される。
That is, in the image forming apparatus, as shown in FIG. 4, cassette containers 102 and 103 containing a plurality of sheets of different sizes are detachably mounted in a paper feed section 101. 1 out of 102, 103
Sheets are fed from the bottom. Then, the toner image is transferred from the photosensitive drum 105 to the sheet at the transfer unit 104, and the toner image is fixed at the fixing unit 106.
In the case of copying on one side only, the flapper 107 rotates in the direction of arrow a in the figure, and the sheet is carried out of the apparatus. However, in the case of multiple copying and double-sided copying, the flapper 107 is at the position shown in the figure. The sheet is conveyed downward.

【0004】多重コピーの場合には、第2のフラッパー
108が図において矢印ロの方向に回動し、シートは搬
送路109を経て中間トレイ110上に搬送され、その
先端は再給紙ローラ111と分離ローラ112に接して
保留される。一方、両面コピーの場合には、第2のフラ
ッパー108は図の位置にあり、シートは搬送路113
に搬送され一対のローラ114にて逆送され、搬送路1
09を経て中間トレイ110上に搬送され同様にして保
留される。
In the case of multiple copying, the second flapper 108 rotates in the direction of arrow B in the figure, the sheet is conveyed onto the intermediate tray 110 via the conveying path 109, and the leading end of the sheet is re-fed roller 111. And is held in contact with the separation roller 112. On the other hand, in the case of double-sided copying, the second flapper 108 is at the position shown in the figure, and the sheet is in the transport path 113.
And is fed back by a pair of rollers 114, and is conveyed to the conveyance path 1.
After being passed through 09, it is conveyed onto the intermediate tray 110 and similarly held.

【0005】更に、中間トレイ110上のシートは再給
紙ローラ111と分離ローラ112とによって一枚づつ
再給紙され、前述同様に転写、定着され装置外へ搬出さ
れ、多重コピー又は両面コピーが完了するようになって
いる。
Further, the sheets on the intermediate tray 110 are re-fed one by one by the re-feeding roller 111 and the separating roller 112, transferred and fixed in the same manner as described above, and carried out of the apparatus to perform multiple copy or double-sided copy. It is supposed to be completed.

【0006】[0006]

【発明が解決しようとする課題】しかしながら、上記従
来例では、中間トレイにシートを積載する際、シートの
サイズに応じてフラッパー120を切り換え、中間トレ
イの入口の位置を変えている。この為、シートのサイズ
が多様化すると、その分フラッパーの数が増加し、構成
が複雑となりコスト的にも不利になるという欠点があっ
た。
However, in the above-mentioned conventional example, when the sheets are stacked on the intermediate tray, the flapper 120 is switched according to the size of the sheets to change the position of the inlet of the intermediate tray. For this reason, when the sheet size is diversified, the number of flappers increases correspondingly, and the configuration becomes complicated, which is disadvantageous in terms of cost.

【0007】[0007]

【課題を解決するための手段】本発明によれば、中間ト
レイ内にシートを積載した後に、後端規制手段等でシー
ト束を搬送し、再給紙位置まで搬送する為、シートサイ
ズに応じたフラッパー切換を不要としたものである。
According to the present invention, after the sheets are stacked in the intermediate tray, the sheet bundle is conveyed by the trailing edge regulating means or the like and is conveyed to the re-feeding position. It does not require flapper switching.

【0008】[0008]

【実施例】以下図1〜図3に沿って本発明の実施例につ
いて説明する。
Embodiments of the present invention will be described below with reference to FIGS.

【0009】図1は、中間トレイ内部の詳細図であり、
図2は、本発明の中間トレイを設けた画像形成装置の本
体の断面図、図3は、中間トレイ内部の動きを示すシー
ケンス図である。
FIG. 1 is a detailed view of the inside of the intermediate tray.
FIG. 2 is a sectional view of the main body of the image forming apparatus provided with the intermediate tray of the present invention, and FIG. 3 is a sequence diagram showing the movement inside the intermediate tray.

【0010】第1面をコピーされたシートは、搬送ロー
ラ30,31を介して中間トレイ1の入口ローラ1a,
1bに搬送され、シートの先端および後端を検知する入
口センサ13、センサレバー12を通り、実線位置にあ
る後端規制トレイ2(2a)の上に着地する(図3のS
51−S52)。
The sheet of which the first side has been copied is conveyed through the conveying rollers 30 and 31 to the entrance rollers 1a of the intermediate tray 1,
The sheet is conveyed to 1b, passes through the entrance sensor 13 that detects the leading edge and the trailing edge of the sheet, and the sensor lever 12, and lands on the trailing edge regulation tray 2 (2a) in the solid line position (S in FIG. 3).
51-S52).

【0011】後端規制トレイ2の上部には、シートを矢
印N方向に寄せるよせローラ5があり、ソレノイドSL
1によってアーム6を矢印A又はB方向に動かして、よ
せローラ5の位置を2段階に切り換ることが可能であ
る。よせローラ5は矢印E方向に回転し、シートがトレ
イ2内へ進入後に落下して、シートS1を矢印N方向に
よせ、後端規制トレイの後面14に突き当たるまでシー
トを搬送する。よせローラ5はスポンジ等の搬送力が比
較的弱い材質で構成され、シートが後面14に突き当っ
た後は、シートの上を空転するように構成されている。
At the upper part of the trailing edge regulation tray 2, there is a biasing roller 5 for biasing the sheet in the direction of arrow N, and a solenoid SL.
It is possible to move the arm 6 in the direction of arrow A or B by 1 to switch the position of the twist roller 5 in two steps. The stirrer roller 5 rotates in the direction of arrow E, the sheet enters the tray 2 and then drops, and the sheet S1 is moved in the direction of arrow N and conveyed until it abuts the rear surface 14 of the trailing edge regulation tray. The twist roller 5 is made of a material such as sponge having a comparatively weak conveying force, and is configured to idle above the sheet after the sheet hits the rear surface 14.

【0012】シートが入口から搬送される時は、SL1
はOFFで、よせローラ5はシートをよけて、5c(図
1)の状態で待っている。次に、入口ローラが、シート
の後端を検知した後、ソレノイドSL1がONし、よせ
ローラが5cから5aの位置に下がり、シートS1を後
端規制トレイ2の後面14にシートが突き当る為の十分
な時間回転した後、SL1がOFFし、よせローラ5も
回転停止する(S54〜S56)。
When the sheet is conveyed from the entrance, SL1
Is OFF, and the stagger roller 5 is waiting in the state of 5c (FIG. 1), avoiding the sheet. Then, after the entrance roller detects the trailing edge of the sheet, the solenoid SL1 is turned on, the twist roller is lowered from the position 5c to the position 5a, and the sheet S1 collides with the rear surface 14 of the trailing edge regulation tray 2 so that the sheet collides. After rotating for a sufficient time, SL1 is turned off, and the stir roller 5 also stops rotating (S54 to S56).

【0013】以上の動作を、コピーの設定枚数のF回行
なって終了後、後端規制トレイ2上にF枚のシート束が
積載される。その後、トレイ2が2aから2bまで移動
し(トレイ2の移動手段は、例えば、ステッピングモー
タMOにベルト20を付けて、トレイを動かす構成であ
る)、再給紙ポジションにスタンバイする(S57)。
After the above operation is performed F times for the set number of copies, a bundle of F sheets is stacked on the trailing edge regulation tray 2. After that, the tray 2 moves from 2a to 2b (the moving means of the tray 2 is configured to move the tray by attaching the belt 20 to the stepping motor MO, for example) and stands by at the re-feed position (S57).

【0014】その後、ソレノイドSL2がONし、ピッ
クアップローラ8がシート束上に落下し、上面のシート
をピックアップし、リタードローラ等で構成されるシー
ト分離機構の入った再給紙ローラ9,10に搬送され、
第2面の画像形成が行われる。
Thereafter, the solenoid SL2 is turned on, the pickup roller 8 falls on the sheet bundle, picks up the upper sheet, and is fed to the sheet re-feeding rollers 9 and 10 having a sheet separating mechanism including a retard roller and the like. Transported,
Image formation on the second surface is performed.

【0015】ここで、図1の3,4は、シートの側面を
規制する為のサイド規制であり、矢印L,M方向にそれ
ぞれが動く。シートが中間トレイに入る時は、シートの
サイドの位置より少し外側にサイド規制3,4は待機
し、シートとの干渉を防ぐ。シートが後端の規制トレイ
2上に着地し、よせローラ5でシートをよせている時、
サイド規制も矢印L,M方向に移動し、シートのサイド
を押しながらシート束の側面をおさえ、揃える。その
後、後端規制トレイ2が2aから2bへ移動する時はサ
イド規制3,4はシート束の側面から極くわずか隔れ、
シート束の移動を妨げない様にする。後端規制トレイ2
が2bに停止した後、再びサイド規制はシート束の側面
に接する位置に移動し、再給紙中のシートの側面を規制
する。
Here, reference numerals 3 and 4 in FIG. 1 are side restrictions for restricting the side surface of the sheet, which move in the directions of arrows L and M, respectively. When the sheet enters the intermediate tray, the side restraints 3 and 4 stand by slightly outside the position of the side of the sheet to prevent interference with the sheet. When the sheet lands on the regulation tray 2 at the rear end and the sheet is deflected by the deflection roller 5,
The side regulation also moves in the directions of the arrows L and M, and while pushing the side of the sheet, the side surface of the sheet bundle is held and aligned. After that, when the trailing edge regulation tray 2 moves from 2a to 2b, the side regulations 3 and 4 are slightly separated from the side surface of the sheet bundle,
Be careful not to hinder the movement of the sheet bundle. Rear edge control tray 2
After stopping at 2b, the side regulation again moves to a position in contact with the side surface of the sheet bundle, and regulates the side surface of the sheet being re-fed.

【0016】尚、後端規制トレイ2は中間トレイの底板
1に、溝等に案内されて送り方向にスライド可能に保持
されている。サイド規制3,4についても同様であっ
て、送り方向に直交する方向にスライド可能に保持され
ている。後端規制トレイ2の平面2cと、サイド規制
3,4の平面3a,4aは同面であって、図1に示すよ
うに、シートを保持する。
The trailing edge regulating tray 2 is held by the bottom plate 1 of the intermediate tray so as to be slidable in the feeding direction by being guided by a groove or the like. The same applies to the side restraints 3 and 4, and the side restraints 3 and 4 are held slidably in the direction orthogonal to the feed direction. The flat surface 2c of the trailing edge regulation tray 2 and the flat surfaces 3a, 4a of the side regulation 3, 4 are the same surface, and hold the sheet as shown in FIG.

【0017】[0017]

【発明の効果】以上説明したように、中間トレイ入口の
シートのサイズによって切換るフラッパーを廃止し、代
わりに、後端規制トレイを用いてシート束を搬送するこ
とにより、シートのサイズ対応、特に、小サイズのシー
トを処理することが可能となる。又、フラッパー廃止に
ともない、フラッパーの占有面積が無くなるので、中間
トレイの高さも小さくなる。
As described above, the flapper, which is switched depending on the size of the sheet at the entrance of the intermediate tray, is eliminated, and instead, the trailing edge regulating tray is used to convey the sheet bundle, thereby making it possible to cope with the sheet size, in particular. It is possible to process small size sheets. Further, as the flapper is abolished, the occupied area of the flapper disappears, and the height of the intermediate tray also decreases.

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

【図1】本発明の詳細を示す中間トレイの斜視図。FIG. 1 is a perspective view of an intermediate tray showing details of the present invention.

【図2】本発明の本体内断面図。FIG. 2 is a sectional view of the inside of the main body of the present invention.

【図3】本発明のシーケンス図。FIG. 3 is a sequence diagram of the present invention.

【図4】従来の例を示す本体内断面図。FIG. 4 is a sectional view of the inside of the main body showing a conventional example.

【符号の説明】[Explanation of symbols]

2 後端規制トレイ 3,4 サイド規制 5 よせローラ 8 ピックアップローラ 2 Rear end regulation tray 3, 4 Side regulation 5 Stagger roller 8 Pickup roller

Claims (2)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 一度画像形成されたシートを保留する為
    の、中間トレイと、 中間トレイ底板上に配置された1対の規制板と、 その規制板の少なくとも一方をシートの送り方向と直角
    にスライドさせる駆動手段と、を有する、中間トレイを
    備える画像形成装置において、 中間トレイ上に積載されているシートの後端(送り方向
    に対して)を規制する手段を有し、 その後端規制手段がシートの搬送方向に移動可能に構成
    されていることを特徴とする、中間トレイを備える画像
    形成装置。
    1. An intermediate tray for holding a sheet on which an image has been once formed, a pair of regulating plates arranged on a bottom plate of the intermediate tray, and at least one of the regulating plates at right angles to the sheet feeding direction. In an image forming apparatus having an intermediate tray having a driving unit for sliding, a unit for regulating the rear end (with respect to the feeding direction) of the sheets stacked on the intermediate tray is provided, and the rear end regulating unit is An image forming apparatus including an intermediate tray, which is configured to be movable in a sheet conveying direction.
  2. 【請求項2】 前記後端規制手段の方向にシートを搬送
    する搬送手段を有することを特徴とする請求項1の画像
    形成装置。
    2. The image forming apparatus according to claim 1, further comprising a conveying unit that conveys a sheet in the direction of the trailing edge regulating unit.
JP3301872A 1991-11-18 1991-11-18 Image forming device equipped with intermediate tray Pending JPH05139629A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3301872A JPH05139629A (en) 1991-11-18 1991-11-18 Image forming device equipped with intermediate tray

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3301872A JPH05139629A (en) 1991-11-18 1991-11-18 Image forming device equipped with intermediate tray

Publications (1)

Publication Number Publication Date
JPH05139629A true JPH05139629A (en) 1993-06-08

Family

ID=17902169

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3301872A Pending JPH05139629A (en) 1991-11-18 1991-11-18 Image forming device equipped with intermediate tray

Country Status (1)

Country Link
JP (1) JPH05139629A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5655173A (en) * 1995-03-07 1997-08-05 Sharp Kabushiki Kaisha Image forming apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5655173A (en) * 1995-03-07 1997-08-05 Sharp Kabushiki Kaisha Image forming apparatus

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