JPH01160434U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本考案の実施例を示すものであり、第１
図は原稿サイズ検知装置を備えた電子写真複写機
の概略図、第２図は原稿サイズ検知装置の一実施
例を示す斜視図、第３図は原稿検知センサの取付
け位置を説明するための平面図、第４図は駆動手
段を示す正面図、第５図は他の実施例を示す斜視
図、第６図は支持部材の他の実施例を示す斜視図
である。 ２ａ……第１光学移動体、２ｂ……第２光学移
動体、５……原稿サイズ検知装置、６……センサ
支持手段、７，７０……駆動手段、２１……ラン
プ、５２……原稿検知センサ、７２……形状記憶
部材、７７……ラツク、７８……ピニオン。 The drawings show an embodiment of the present invention.
The figure is a schematic diagram of an electrophotographic copying machine equipped with a document size detection device, FIG. 2 is a perspective view showing an embodiment of the document size detection device, and FIG. 3 is a plan view for explaining the mounting position of the document detection sensor. 4 is a front view showing the driving means, FIG. 5 is a perspective view showing another embodiment, and FIG. 6 is a perspective view showing another embodiment of the support member. 2a...First optical moving body, 2b...Second optical moving body, 5...Document size detection device, 6...Sensor support means, 7, 70...Driving means, 21...Lamp, 52...Document Detection sensor, 72... Shape memory member, 77... Rack, 78... Pinion.

Claims (1)

【実用新案登録請求の範囲】 原稿載置板上に載置された原稿を光走査するた
めに、第１の光学移動体と第２の光学移動体とを
２対１の割合で移動させるようにした画像形成装
置に設けられ、複数の原稿検知センサによる原稿
の有無の判断によつて原稿サイズを検知する原稿
サイズ検知装置において、 前記複数の原稿検知センサを支持するセンサ支
持手段と、 上記光学移動体の停止時には原稿検知センサを
原稿載置板下面に対向させるべく第２光学移動体
の移動経路内に位置させる第１の状態と、上記光
学移動体の移動時には原稿検知センサを第２光学
移動体の移動経路の下方に位置させる第２の状態
とにセンサ支持手段を移動させる駆動手段とを有
することを特徴とする原稿サイズ検知装置。[Claims for Utility Model Registration] In order to optically scan a document placed on a document placement plate, a first optical movable body and a second optical movable body are moved at a ratio of 2:1. A document size detection device that is installed in an image forming apparatus and detects a document size by determining the presence or absence of a document by a plurality of document detection sensors, comprising: a sensor support means for supporting the plurality of document detection sensors; When the movable body is stopped, the document detection sensor is located in the movement path of the second optical movable body so as to face the lower surface of the document placement plate, and when the optical movable body is moved, the document detection sensor is positioned in the second optical state. A document size detecting device comprising: a second state in which the sensor supporting means is positioned below a moving path of a moving body; and a driving means for moving the sensor supporting means.