JPS5968335U

JPS5968335U - Copy machine original size detection device

Info

Publication number: JPS5968335U
Application number: JP16424482U
Authority: JP
Inventors: 晴雄西山
Original assignee: シャープ株式会社
Priority date: 1982-10-28
Filing date: 1982-10-28
Publication date: 1984-05-09

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

[Brief explanation of the drawing]

第１図及び第２図は本考案の原稿サイズ検知装置の一具
体例を示すもので第１図は断面図、第２図は上面図、第
３図は本考案にかかる反射シートの特性を説明するため
に供する図、第４図は原稿の有無にかかる検出原理を説
明する断面図、第５図は原稿の有無、検出にかかる電気
回路の一例を示す回路図、第６図は原稿カバーの開放時
の原稿検出状態を示す図、第７図は本考案の各センサー
からの検出信号による原稿サイズ検知回路の一例　・を
示す論理回路図である。１・・・・・・原稿台、２・・・・・・原稿カバー、３
・・・・・・原稿、４．４ａ、４ｂ、４ｃ、４ｄ−−−
−−−センサー、５−−−−−−反射シート、６・・・
・・・発光素子、７・・・・・・受光素子、１２・・・
・・・比較器、Ａａ−Ａｅ・・・・・・各原稿サイズ検
知信号を出力するアンドゲート。Figures 1 and 2 show a specific example of the original size detection device of the present invention. Figure 1 is a cross-sectional view, Figure 2 is a top view, and Figure 3 shows the characteristics of the reflective sheet according to the present invention. Figure 4 is a cross-sectional view explaining the principle of detecting the presence or absence of a document. Figure 5 is a circuit diagram showing an example of the electric circuit involved in detecting the presence or absence of a document. Figure 6 is a document cover. FIG. 7 is a logic circuit diagram showing an example of a document size detection circuit based on detection signals from each sensor of the present invention. 1...Document stand, 2...Document cover, 3
...Manuscript, 4.4a, 4b, 4c, 4d---
--- Sensor, 5 --- Reflective sheet, 6...
...Light emitting element, 7... Light receiving element, 12...
. . Comparator, Aa-Ae . . . AND gate that outputs each original size detection signal.

Claims

[Scope of utility model registration request]

a document cover provided on a document table provided at the top of the copying machine so as to be openable and closable; a reflective sheet provided on a surface of the document cover facing the document and reflecting light at the same angle as the incident angle;
A sensor comprising a light-emitting and a light-receiving element is provided according to the size of the document placed at the bottom of the document table, and a detection circuit detects the size of the document placed on the basis of the output from the sensor. A document size detection device for a copying machine characterized by the following.