JPH0431137U - - Google Patents
Info
- Publication number
- JPH0431137U JPH0431137U JP7311990U JP7311990U JPH0431137U JP H0431137 U JPH0431137 U JP H0431137U JP 7311990 U JP7311990 U JP 7311990U JP 7311990 U JP7311990 U JP 7311990U JP H0431137 U JPH0431137 U JP H0431137U
- Authority
- JP
- Japan
- Prior art keywords
- document
- original
- light
- optical sensor
- receiving element
- 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
- 230000003287 optical effect Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
Landscapes
- Holders For Sensitive Materials And Originals (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Description
第１図は本考案の一実施例を示す構成ブロツク
図、第２図及び第３図は本考案の原稿サイズ検出
機構の光センサと円弧上反射板関係を示す図、第
４図は制御信号と検出信号の例を示す信号波形図
、第５図、第６図、第７図、第８図は演算例を説
明するための図で原稿台上方から見た平面図、第
９図は国内用紙サイズの標準を示す図、第１０図
ａ，ｂは光センサ制御回路のブロツク図と受光素
子出力レベル特性図、第１１図ａ，ｂは原稿画像
信号を感光体ドラムに導く経路を示す経路図、第
１２図ａ，ｂ，ｃ，ｄ，ｅ，ｆ，ｇは本考案の制
御手順の一実施例を示すフローチヤート図である
。
１……原稿台、２……原稿、３……原稿押さえ
板、４……スイツチ、５……ロツド、６……受光
素子、７……受光素子、８……モータ、９，９９
……光センサ、１０……ソレノイド、１１，１１
１……円弧状反射板、１２……モータ駆動回路、
１３……エンコーダ、１４……発光素子駆動回路
、１５……ソレノイド駆動回路、１６……制御回
路、１７……出力インタフエース、１８……ＣＰ
Ｕ、１９……入力インタフエース、２０……ＲＯ
Ｍ、２１……ＲＡＭ。
FIG. 1 is a configuration block diagram showing an embodiment of the present invention, FIGS. 2 and 3 are diagrams showing the relationship between the optical sensor and the arc reflector of the document size detection mechanism of the present invention, and FIG. 4 is a control signal and signal waveform diagrams showing examples of detection signals; Figures 5, 6, 7, and 8 are diagrams for explaining calculation examples, and are plan views seen from above the document table; Figure 9 is a domestic Figures 10a and 10b show the standard paper size; Figures 10a and 10b are a block diagram of the optical sensor control circuit and light-receiving element output level characteristics; Figures 11a and 11b are the paths that guide the original image signal to the photoreceptor drum. 12a, b, c, d, e, f, and g are flowcharts showing one embodiment of the control procedure of the present invention. DESCRIPTION OF SYMBOLS 1... Original table, 2... Original, 3... Original holding plate, 4... Switch, 5... Rod, 6... Light receiving element, 7... Light receiving element, 8... Motor, 9,99
... Optical sensor, 10 ... Solenoid, 11, 11
1... Arc-shaped reflecting plate, 12... Motor drive circuit,
13... Encoder, 14... Light emitting element drive circuit, 15... Solenoid drive circuit, 16... Control circuit, 17... Output interface, 18... CP
U, 19...input interface, 20...RO
M, 21...RAM.
Claims (1)
板と、原稿押さえ板の開閉状態を検出するスイツ
チ手段と、原稿台下部に水平に回転駆動されるよ
うに配置され発光素子及び受光素子を有した少な
くとも二組の光センサ手段と、上記発光素子から
の光を原稿方向に回折しまた原稿からの反射光を
上記受光素子方向に回折する円弧状反射板と、上
記光センサの回転角度または回転駆動制御パルス
の数と原稿の反射光とから原稿サイズ及び原稿載
置状態を判定する手段と、上記光センサ及び円弧
状反射板により原稿面をスキヤンする位置を変更
する手段を備えたことを特徴とする画像形成装置
の原稿検知装置。 (2) 原稿を原稿台上に押圧密着させる原稿押さ
え板と、原稿押さえ板の開閉状態を検出するスイ
ツチ手段と、原稿台下部に水平に回転駆動される
ように配置され発光素子及び受光素子を有した少
なくとも二組の光センサ手段と、上記発光素子か
らの光を原稿方向に回折しまた原稿からの反射光
を上記受光素子方向に回折する円弧状反射板と、
上記光センサの回転角度または回転駆動制御パル
スの数と原稿の反射光とから原稿サイズ及び原稿
載置状態を判定する手段と、上記光センサ及び円
弧状反射板により原稿面をスキヤンする位置を変
更する手段と、検出した原稿載置状態情報に基づ
き原稿画像の傾きを補正して転写紙に正対した画
像データを出力する手段とを備えたことを特徴と
する画像形成装置の原稿検知装置。[Scope of Claim for Utility Model Registration] (1) A document holding plate that presses the original into close contact with the document table, a switch means for detecting the open/closed state of the document holding plate, and a device that is horizontally driven to rotate at the bottom of the document table. at least two sets of optical sensor means disposed and having a light emitting element and a light receiving element; and an arcuate reflecting plate that diffracts light from the light emitting element toward the original document and diffracts reflected light from the original toward the light receiving element. , a means for determining the size of the original and the state of placing the original from the rotation angle of the optical sensor or the number of rotation drive control pulses and the reflected light of the original; A document detection device for an image forming apparatus, characterized in that it includes a means for changing. (2) A document holding plate that presses and brings the document into close contact with the document table; a switch means that detects the opening/closing state of the document holding plate; and a light emitting element and a light receiving element arranged horizontally and rotationally at the bottom of the document table. at least two sets of optical sensor means, and an arcuate reflecting plate that diffracts light from the light emitting element toward the original document and diffracts reflected light from the original toward the light receiving element;
A means for determining the document size and document placement state based on the rotation angle of the optical sensor or the number of rotation drive control pulses and the reflected light of the document, and changing the position at which the document surface is scanned by the optical sensor and the arcuate reflector. What is claimed is: 1. A document detection device for an image forming apparatus, comprising: means for correcting the inclination of the document image based on detected document placement state information and outputting image data facing directly onto transfer paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7311990U JPH0431137U (en) | 1990-07-09 | 1990-07-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7311990U JPH0431137U (en) | 1990-07-09 | 1990-07-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0431137U true JPH0431137U (en) | 1992-03-12 |
Family
ID=31611667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7311990U Pending JPH0431137U (en) | 1990-07-09 | 1990-07-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0431137U (en) |
-
1990
- 1990-07-09 JP JP7311990U patent/JPH0431137U/ja active Pending
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