JPH04199066A - Two-side image forming device - Google Patents
Two-side image forming deviceInfo
- Publication number
- JPH04199066A JPH04199066A JP2332687A JP33268790A JPH04199066A JP H04199066 A JPH04199066 A JP H04199066A JP 2332687 A JP2332687 A JP 2332687A JP 33268790 A JP33268790 A JP 33268790A JP H04199066 A JPH04199066 A JP H04199066A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- tray
- switching
- image forming
- 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
Links
Landscapes
- Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
- Conveyance By Endless Belt Conveyors (AREA)
- Counters In Electrophotography And Two-Sided Copying (AREA)
- Paper Feeding For Electrophotography (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は両面画像形成装置、詳細には、例えばページプ
リンター及び複写機において、プリント用紙の両面にプ
リントを行なうための両面搬送装置に関するものである
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a double-sided image forming apparatus, and more particularly, to a double-sided conveying apparatus for printing on both sides of print paper in, for example, page printers and copying machines. be.
［従来の技術］
従来、大型ＬＢＰの両面搬送装置は、第４図に示される
ように、第１面目をプリントした後、−度中間トレイに
貯えられることによってコントローラーへの負荷を減ら
して処理速度を上げているが、小型ＬＢＰの場合、第５
図に示されるように、大きさの規制により、中間トレイ
を設けられていない。[Prior Art] Conventionally, as shown in FIG. 4, in a large LBP double-sided conveying device, after printing the first side, the paper is stored in an intermediate tray to reduce the load on the controller and increase processing speed. However, in the case of small LBP, the fifth
As shown in the figure, due to size restrictions, no intermediate tray is provided.
［発明が解決しようとしている課題］
しかしながら、上記従来例では、第１面プリント後必ず
、第２面目をプリントするように作動するため次のよう
な欠点があった。[Problems to be Solved by the Invention] However, in the conventional example described above, since the second side is always printed after printing on the first side, there are the following drawbacks.
（１）同じページを２枚以上プリントする場合、コント
ローラー側は常にデータ処理を行なうためプリントスピ
ードが低下してしまう。(1) When printing two or more of the same page, the controller side constantly processes data, resulting in a decrease in printing speed.
（２）大型ＬＢＰのような中間トレイを設けようとした
場合、スペースを取りすぎて小型化ができず、もし両面
搬送をオプション化した場合、オプションをつけないベ
ースモデルに余分なスペースができてしまう。(2) If you try to install an intermediate tray like a large LBP, it will take up too much space and you won't be able to downsize it, and if you make double-sided conveyance an option, there will be extra space in the base model without the option. Put it away.
［課題を解決するための手段（及び作用）コ本発明によ
れば例えば、中間トレイを排紙トレイとを同一スペース
上に上下に配置し、どちらのトレイに用紙を搬送するか
を切り換えレバーにより選択できるようにしたことによ
り、小型ＬＢＰの両面搬送装置において装置を大きくせ
ずに中間トレイを設けることにより、両面搬送時のプリ
ント速度を上げるものである。[Means (and effects) for solving the problem] According to the present invention, for example, an intermediate tray and a paper output tray are arranged one above the other in the same space, and a switching lever is used to select which tray the paper is to be transported to. By making this option selectable, an intermediate tray can be provided in a small LBP double-sided conveyance device without increasing the size of the device, thereby increasing the printing speed during double-sided conveyance.
［実施例］
第１図は本発明の特徴を最もよく表わす図面であり、同
図に於いて、１．２は用紙カセット、３．４は給紙ロー
ラー、５は画像の現像及び転写装置、６は定着装置、７
は搬送路の切り換え装置、８は排紙用トレイ、９は中間
トレイ、１０は用紙を再給送ローラー′まで送る搬送ロ
ーラー、１】は中間トレイより最下層の紙だけを給紙す
る再給紙ローラ−、＋２ａ、ｂ、ｃは用紙を搬送するた
めの搬送ローラーである。[Example] Fig. 1 is a drawing that best represents the features of the present invention, and in the figure, 1.2 is a paper cassette, 3.4 is a paper feed roller, 5 is an image development and transfer device, 6 is a fixing device, 7
1 is a transport path switching device, 8 is a paper ejection tray, 9 is an intermediate tray, 10 is a transport roller that transports the paper to the refeed roller ', and 1] is a refeeder that feeds only the lowest layer of paper from the intermediate tray. Paper rollers +2a, b, and c are conveyance rollers for conveying paper.
上記構成において、給紙ローラー３（４）により用紙カ
セット１（２）より給紙された用紙は、現像および転写
装置５により画像が転写され、定着装置６によって画像
が固定され、搬送路切り換え装置７が第１図の位置にあ
るとき、中間トレイ９に搬送される。In the above configuration, the paper fed from the paper cassette 1 (2) by the paper feed roller 3 (4) has an image transferred thereto by the developing and transfer device 5, the image fixed by the fixing device 6, and the image is fixed by the conveyance path switching device. 7 is in the position shown in FIG. 1, it is transported to the intermediate tray 9.
中間トレイ９に積載された用紙は搬送ローラー１．０に
よって再給紙ローラ−１１に送られ、再給紙ローラ−１
１によって最下層の用紙のみ分離されると同時に用紙の
先端と後端が逆転して搬送され、搬送ローラー１２ａ、
１２ｂ、 ｌ ２ｃによって再び現像及び転写装置５
に反転された状態で搬送されて、第２面目に像が転写さ
れ、定着装置６によって第２面目の画像が固定され、搬
送警句り換え装置７が第２図に示す位置に切り換えられ
て用紙は排紙トレイ８に排出される。The paper stacked on the intermediate tray 9 is sent to the paper refeed roller 11 by the transport roller 1.0,
1, only the bottom layer of paper is separated, and at the same time, the leading and trailing ends of the paper are reversed and conveyed, and conveyed by conveying rollers 12a,
12b, l 2c again the development and transfer device 5
The image is transferred to the second side, the image on the second side is fixed by the fixing device 6, and the conveyance index changing device 7 is switched to the position shown in FIG. is discharged onto the paper discharge tray 8.
［他の実施例コ
第３図は他の実施例を示し、１３はフェイスダウンの排
紙トレイを示し、１４はフェイスアップとフェイスダウ
ンの排紙トレイの切換えレバー、１５ａ、１５ｂは搬送
ローラーを示す。この場合、定着装置６で第１面目を固
定された用紙は切換えレバー１４でフェイスダウンの排
紙トレイ１３側に切り換えられ、搬送ローラー１５ａ、
１５ｂによって搬送され、切換えレバー７によって中間
トレイ９に積載される。中間トレイ９に積載された用紙
は再給紙ロー１０ＪＩによって最下層の用紙のみ給紙さ
れ、次に搬送ローラー１５ｂが逆転して用紙を搬送ロー
ラー１２ａ、１２ｂ、１．２ｃに送り込み、第２面目を
プリントした後、フェイスダウントレイ１３またはフェ
イスアップトレイ８に排紙される。[Other Embodiments] Figure 3 shows another embodiment, 13 is a face-down paper output tray, 14 is a lever for switching between face-up and face-down paper output trays, and 15a and 15b are transport rollers. show. In this case, the paper whose first side is fixed by the fixing device 6 is switched to the face-down paper output tray 13 side by the switching lever 14,
15b, and loaded onto the intermediate tray 9 by the switching lever 7. The paper stacked on the intermediate tray 9 is fed only the lowest layer by the paper refeeding row 10JI, and then the conveyance roller 15b reverses and feeds the paper to the conveyance rollers 12a, 12b, 1.2c, and the second side is fed. After printing, the paper is discharged onto the face-down tray 13 or the face-up tray 8.
［発明の効果］
以上説明したように、排紙トレイと中間トレイを上下に
配置し、切換えレバーにより排出されるトレイを切換え
ることにより、装置を大きくすることなく、両面プリン
トの処理速度を上げる効果がある。[Effects of the Invention] As explained above, by arranging the paper ejection tray and the intermediate tray one above the other and switching the ejection tray using the switching lever, it is possible to increase the processing speed of double-sided printing without increasing the size of the device. There is.
第１図は本発明を実施したＬＢＰの主断面、第２図は切
換えレバー７の動作を示す断面図、第３図は他の実施例
を示す断面図、
第４図は従来の大型ＬＢＰの中間トレイの配置を示す断
面図、
第５図は従来の小型ＬＢＰの構造を示す断面図である。
７・・・排紙トレイと中間トレイの切換えレバー８・・
・フェイスアップの排紙トレイ
９・・中間トレイ
１０・・・用紙の搬送ローラー
１１・・・再給送ローラー
１２ａ、１２ｂ、１２ｃ＝・搬送ローラー１４・・・フ
ェイスアップとフェイスダウンの排紙トレイの切換えレ
バー
１５ａ、１５ｂ・・・搬送ローラー
１６・・・用紙の反転装置Fig. 1 is a main cross section of an LBP embodying the present invention, Fig. 2 is a sectional view showing the operation of the switching lever 7, Fig. 3 is a sectional view showing another embodiment, and Fig. 4 is a cross section of a conventional large LBP. FIG. 5 is a sectional view showing the arrangement of the intermediate tray. FIG. 5 is a sectional view showing the structure of a conventional small LBP. 7... Paper output tray and intermediate tray switching lever 8...
・Face-up paper output tray 9 ・・Intermediate tray 10 ・・Paper transport roller 11 ・・Re-feed rollers 12a, 12b, 12c=・・Transport roller 14 ・・・Face-up and face-down paper output tray Switching levers 15a, 15b...Transport roller 16...Paper reversing device
Claims (2)
後、第二面目をプリントする前に用紙を一時的に蓄える
ための中間トレイ、を上下に配置し、切り換えレバーに
よって排紙を搬送するトレイを切り換えることを特徴と
する両面画像形成装置。(1) A paper output tray and an intermediate tray for temporarily storing paper after printing the first side and before printing the second side during duplex conveyance are arranged above and below, and the output paper is conveyed using a switching lever. A double-sided image forming apparatus characterized by switching trays.
の上面に配される第２の排紙トレイと、上記第２の排紙
トレイに対して上下位置関係に配置される中間トレイと
、 画像形成後の用紙を上記第１の排紙トレイ又は上記第２
の排紙トレイに導くように切換える第１のフラッパ手段
と、 画像形成後の用紙を上記第２の排紙トレイ又は上記中間
トレイに導くように切換える第２のフラッパ手段と、 上記第１のフラッパ手段と上記第２の排紙トレイの間に
在って、用紙の表裏を反転させる反転パスと、 上記中間トレイの用紙を再び画像形成手段へ導く再給送
パスと、 を備える両面画像形成装置。(2) A first paper ejection tray arranged on the side of the device, a second paper ejection tray arranged on the top surface of the device, and arranged in a vertical positional relationship with respect to the second paper ejection tray. an intermediate tray, and the paper after image formation is transferred to the first paper output tray or the second paper output tray.
a first flapper means for switching to guide the paper after image formation to the second paper discharge tray or the intermediate tray; and a first flapper for switching to guide the sheet after image formation to the second paper discharge tray or the intermediate tray. a double-sided image forming apparatus comprising: a reversing path that is located between the means and the second paper ejection tray and reverses the front and back of the paper; and a refeeding path that guides the paper in the intermediate tray to the image forming means again. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2332687A JPH04199066A (en) | 1990-11-29 | 1990-11-29 | Two-side image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2332687A JPH04199066A (en) | 1990-11-29 | 1990-11-29 | Two-side image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04199066A true JPH04199066A (en) | 1992-07-20 |
Family
ID=18257759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2332687A Pending JPH04199066A (en) | 1990-11-29 | 1990-11-29 | Two-side image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04199066A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8371582B2 (en) | 2009-06-29 | 2013-02-12 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus |
-
1990
- 1990-11-29 JP JP2332687A patent/JPH04199066A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8371582B2 (en) | 2009-06-29 | 2013-02-12 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus |
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