JPH04182242A - Image forming device provided with paper discharge tray - Google Patents
Image forming device provided with paper discharge trayInfo
- Publication number
- JPH04182242A JPH04182242A JP2310687A JP31068790A JPH04182242A JP H04182242 A JPH04182242 A JP H04182242A JP 2310687 A JP2310687 A JP 2310687A JP 31068790 A JP31068790 A JP 31068790A JP H04182242 A JPH04182242 A JP H04182242A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- tray
- ohp
- discharge tray
- paper discharge
- 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
- 238000001514 detection method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
Landscapes
- Control Or Security For Electrophotography (AREA)
- Controlling Sheets Or Webs (AREA)
- Pile Receivers (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は排紙トレーを備える画像形成装置に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to an image forming apparatus equipped with a paper discharge tray.
［従来の技術］
従来、ＯＨＰ用紙に複写することがまれであった為か、
ＯＨＰ用紙の包装部に、「排紙トレーに、ＯＨＰ用紙又
は紙があると排紙部でジャムが発生し易いので、必ずコ
ピー毎に紙をトレーから取り去る様」説明するのみであ
った。[Prior art] This may be because it was rare to copy on OHP paper in the past.
The OHP paper packaging department only explained that ``If there is OHP paper or paper in the paper output tray, jams are likely to occur in the paper output section, so be sure to remove the paper from the tray before each copy.''
［発明が解決しようとしている課題］
従来より、複写機の排紙トレーは次の２つの条件を満た
さなければならなかった。[Problems to be Solved by the Invention] Conventionally, the paper output tray of a copying machine has had to satisfy the following two conditions.
（１）トレーの積載量が多いこと、
（２）紙サイズが異なっても紙揃えが良いこと、この為
に従来、排紙トレーは第２図に示すものが一般的であっ
た。つまり、トレーは上向きに傾いており、サイズの異
なった紙でもすべて排紙口側の端面が揃う構造である。Conventionally, the paper output tray shown in Fig. 2 has been common because (1) the tray can carry a large amount of paper, and (2) the paper can be arranged well even if the paper sizes are different. In other words, the tray is tilted upward, so that even sheets of different sizes are all aligned on the paper ejection port side.
又、トレーの深さｐを大きくすることによって紙の積載
量を増加させている。Also, by increasing the depth p of the tray, the amount of paper loaded is increased.
この様なトレーにＯＨＰ用紙が排紙されると、第４図に
示す様に、ＯＨＰ用紙はトレーの角部に折曲る様に排紙
され冷やされる。ＯＨＰ用紙はポリエステル系のシート
に複写機のトナーが載り易いように表面を加工したもの
であるので、定着熱によって軟化しており、排紙ローラ
によって押出されても腰が折れて、トレーの傾斜部に、
正しく載らなかった。折曲がったままトレー上で冷やさ
れたＯ ＨＰ用紙は、再び加熱して伸ばさないかぎり、
カールは取り除けない。そのため、０ＨＰ（オーハーヘ
ッドプロジェクター）で投影すると画像が歪んだり、ピ
ント不良になる等の欠点があった。又、ＯＨＰ用紙は、
摩擦係数が高く１、トレー上にＯＨＰ用紙があると、次
のＯＨＰ用紙がスムーズに排紙されない欠点もある。When the OHP paper is delivered to such a tray, as shown in FIG. 4, the OHP paper is delivered so as to be bent at the corner of the tray and cooled. OHP paper is a polyester sheet whose surface has been treated to make it easier for copying machine toner to adhere to it, so it softens due to the heat of fixing, and when pushed out by the paper ejection roller, it bends, causing the tray to tilt. In the department,
It wasn't posted correctly. OHP paper that has been cooled on the tray while being folded will not hold up unless it is heated again and stretched.
Curls cannot be removed. Therefore, when projected with 0HP (Ohahead projector), there were drawbacks such as distorted images and poor focus. Also, OHP paper is
The coefficient of friction is high (1), and if there is OHP paper on the tray, the next OHP paper cannot be ejected smoothly.
［課題を解決するための手段（及び作用）］本発明は、
排紙トレーに、紙検知手段を設けることにより排紙トレ
ーに紙を検知したときにＯＨＰ用紙を給紙しようとする
と警告を発するか、コピー動作を停止したものである。[Means for solving the problem (and action)] The present invention has the following features:
By providing a paper detection means on the paper ejection tray, when paper is detected on the paper ejection tray, a warning is issued or the copying operation is stopped when an attempt is made to feed OHP paper.
［実施例］ 図面に従って本発明を説明する。[Example] The present invention will be explained according to the drawings.
第１図は本発明による紙検知手段をもつトレーを備えた
複写機である。■は排紙トレー、２はトレー１に保持さ
れた受光素子、３は複写機本体４に取付けられた光源で
ある。前述した光源３と受光素子２は互いに向き合う方
向に設定されている。５，６は１対の排紙ローラーであ
る。７は紙カセット、８は給紙ローラー、９は手差しト
レーで、ＯＨＰ用紙は手差しトレーより給紙される。１
０．１１は一対の手差しローラーである。１２４３は給
紙ガイド、１４はＯＨＰ検知用光源、１５は受光素子で
、１４．１５によ′ってＯＨＰ紙、検知手段を設けてい
る。１６．１７は１対のレジストローラーである。以上
の説明の他に不図示の複写機を構成する画像読取り手段
、画像処理手段、電子写真プロセスによる画像形成手段
、転写手段、定着手段等があるが、いづれも特公昭６４
−２５７７４等に記載しであるものと同等であるので本
説明ではこれを省略する。FIG. 1 shows a copying machine equipped with a tray having paper detection means according to the present invention. 2 is a paper discharge tray, 2 is a light receiving element held on the tray 1, and 3 is a light source attached to the main body 4 of the copying machine. The light source 3 and light receiving element 2 described above are set to face each other. 5 and 6 are a pair of paper ejection rollers. 7 is a paper cassette, 8 is a paper feed roller, and 9 is a manual feed tray. OHP paper is fed from the manual feed tray. 1
0.11 is a pair of manual feed rollers. 1243 is a paper feed guide, 14 is a light source for OHP detection, 15 is a light receiving element, and OHP paper and detection means are provided by 14.15'. 16 and 17 are a pair of registration rollers. In addition to the above description, there are image reading means, image processing means, image forming means by electrophotographic process, transfer means, fixing means, etc. that constitute the copying machine (not shown), but all of them are
-25774 etc., so it will be omitted in this explanation.
次に前述した実施例の動作を以下に説明する。Next, the operation of the above-described embodiment will be explained below.
手差しトレー９からＯＨＰ用紙を給紙するとＯＨＰセン
サーを形成する、光源】４と受光素子１５によってＯＨ
Ｐ紙であることが確認されると、図示せぬシーケンスコ
ントローラーによって排紙トレーＩ上に紙１８があるか
を光源３と受光素子２によって検知する。もし、紙があ
った場合はブザー１９による警告又は表示板２０上の警
告ランプ２１を点灯させる。When OHP paper is fed from the manual feed tray 9, an OHP sensor is formed by the light source 4 and the light receiving element 15.
When it is confirmed that the paper is P paper, a sequence controller (not shown) detects whether the paper 18 is on the paper discharge tray I using the light source 3 and the light receiving element 2. If there is paper, a buzzer 19 will be used to warn you or a warning lamp 21 on the display board 20 will be turned on.
前記の他のシーケンスによる実施例では、ＯＨＰ用紙検
知手段１４．１５によってＯＨＰ用紙が検知されると、
排紙トレー、センサー２，３によって排紙トレー上の紙
の有無を検知し紙があった場合には、レジストローラー
１６．１７でＯＨＰ紙の搬送を止めるものである。In the embodiment according to the other sequence described above, when OHP paper is detected by the OHP paper detection means 14.15,
The paper output tray and sensors 2 and 3 detect the presence or absence of paper on the paper output tray, and if there is paper, registration rollers 16 and 17 stop conveyance of the OHP paper.
第２図は本発明の主旨である排紙トレーの紙検知手段を
、反射型のセンサーを用いたものである。図に於いて、
１はトレー、２０１は光源、２０２は受光素子で、トレ
ー１上に設けられた穴２０３に焦点が合っており、トレ
ー上に紙がある時、受光素子２０２によって反射光が検
知される。FIG. 2 shows a paper detection means for a paper discharge tray, which is the gist of the present invention, using a reflective sensor. In the figure,
1 is a tray, 201 is a light source, and 202 is a light receiving element, which is focused on a hole 203 provided on the tray 1, and when there is paper on the tray, reflected light is detected by the light receiving element 202.
第３図は排紙トレーセンサーを本体側に設はトレー上に
は反射板を設けることによって、トレーへの配線が不要
となり、トレーの着脱が容易となる。第３図に於いて、
ｌは排紙トレー、３ｏ１は排紙トレー１に設けられた反
射板、３０２は光源、３０３は受光素子で共に反射板３
０１に対して共役関係に設定されている。トレー１上に
紙があると光源３０２からの光は、点線で示す方向へそ
れるが紙が無い場合には、反射板によって反射した光が
受光素子３０３に検知される。In FIG. 3, a discharge tray sensor is provided on the main body side. By providing a reflective plate on the tray, wiring to the tray is not required, and the tray can be easily attached and detached. In Figure 3,
1 is a paper output tray, 3o1 is a reflective plate provided on the paper output tray 1, 302 is a light source, and 303 is a light receiving element, both of which are reflective plates 3.
It is set in a conjugate relationship with respect to 01. When there is paper on the tray 1, the light from the light source 302 is deflected in the direction shown by the dotted line, but when there is no paper, the light reflected by the reflector is detected by the light receiving element 303.
以上、第１〜第３図の実施例に於いて、受光素子は外光
を受は易いが、光源を赤外光にするとかパルス発光させ
ることによって外光の影響をなくすことができる。As described above, in the embodiments shown in FIGS. 1 to 3, the light receiving element easily receives external light, but the influence of external light can be eliminated by using infrared light as the light source or by emitting pulsed light.
［発明の効果コ
本発明によれば、トレー上にＯＨＰ用紙を構成すると、
排紙部で紙ジヤムが発生し易いので、トレー上に紙があ
ることを検知し、警告若しくはコピー動作を止めるもの
でこれによって、ＯＨＰ用紙の排紙部ジャムを無くすこ
とができる。[Effects of the Invention] According to the present invention, when OHP paper is arranged on a tray,
Since paper jams are likely to occur at the paper ejection section, the presence of paper on the tray is detected and a warning is issued or the copying operation is stopped, thereby eliminating jams at the paper ejection section of OHP paper.
第１図（Ａ）は、本発明による複写機の断面図、第１図
（Ｂ）は制御ブロック図、
第２図、第３図は他の実施例による複写機の正面図、
第４図は従来例である。
１・・・排紙トレー
２・・・受光素子
３・・・光源、
１４．１５・・ＯＨＰ用紙センサーFIG. 1(A) is a sectional view of a copying machine according to the present invention, FIG. 1(B) is a control block diagram, FIGS. 2 and 3 are front views of a copying machine according to another embodiment, and FIG. 4 is a conventional example. 1... Paper output tray 2... Light receiving element 3... Light source, 14.15... OHP paper sensor
Claims (1)
成装置に於いて、 排紙トレー上の紙を検知する手段を備えＯＨＰ用紙に複
写する場合、排紙トレー上の紙を検知して警告を出すこ
とを特徴とする画像形成装置。(1) In a thermal fixing image forming apparatus that has an OHP paper detection means, when copying onto OHP paper, it is equipped with a means for detecting paper on the paper output tray. An image forming apparatus characterized by issuing a warning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2310687A JPH04182242A (en) | 1990-11-16 | 1990-11-16 | Image forming device provided with paper discharge tray |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2310687A JPH04182242A (en) | 1990-11-16 | 1990-11-16 | Image forming device provided with paper discharge tray |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04182242A true JPH04182242A (en) | 1992-06-29 |
Family
ID=18008251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2310687A Pending JPH04182242A (en) | 1990-11-16 | 1990-11-16 | Image forming device provided with paper discharge tray |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04182242A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007261694A (en) * | 2006-03-27 | 2007-10-11 | Canon Inc | Sheet feeding device and image forming device |
| JP2009234732A (en) * | 2008-03-27 | 2009-10-15 | Fuji Xerox Co Ltd | Image forming device |
| JP2009242080A (en) * | 2008-03-31 | 2009-10-22 | Fuji Xerox Co Ltd | Paper detecting device, paper stacking device and image forming device |
-
1990
- 1990-11-16 JP JP2310687A patent/JPH04182242A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007261694A (en) * | 2006-03-27 | 2007-10-11 | Canon Inc | Sheet feeding device and image forming device |
| JP2009234732A (en) * | 2008-03-27 | 2009-10-15 | Fuji Xerox Co Ltd | Image forming device |
| JP2009242080A (en) * | 2008-03-31 | 2009-10-22 | Fuji Xerox Co Ltd | Paper detecting device, paper stacking device and image forming device |
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