JPH0243869U

JPH0243869U -

Info

Publication number: JPH0243869U
Application number: JP12158088U
Authority: JP
Priority date: 1988-09-19
Filing date: 1988-09-19
Publication date: 1990-03-27

Description

[Brief explanation of drawings]

第１図は、本考案に係る用紙検出装置の一実施
例を適用した画像形成装置の概略線図、第２図は
、第１図において、用紙案内部に導入された用紙
をストレートトレイユニツトに排出する場合の態
様を示す概略図、第３図は、同じく用紙をフエイ
スダウンで排出する態様を示す概略図、第４図は
、同じく用紙を反転搬送する態様を示す概略図、
第５図は、用紙の反転搬送時に用紙を咬み込み用
紙の移動を阻止している態様を示す概略図、第６
図Ａ，Ｂは、切換ゲート及び第３紙検知アクチユ
エータ部分を一部断面で示す上面図及び側面図、
第７図及び第８図は、第３紙検知アクチユエータ
の動作態様を示す図である。図において、１は画像形成装置、２１は第３搬
送ローラ対、２２はストレートトレイユニツト、
２３は切換ゲート、２４は排紙ローラ対、２９は
第３紙検知アクチユエータ、３３は反転紙受け、
３６は反転ローラ、３７は反転リブガイド、３８
は弯曲紙ガイド、３９は用紙案内部、４０は前進
搬送経路、４２は反転紙経路、５０は切換ゲート
軸、５１はアクチユエータ回動軸、５５はフレー
ム、５７は逆Ｌ字状アーム、６１は検出アーム、
６４は反射型センサーである。 FIG. 1 is a schematic diagram of an image forming apparatus to which an embodiment of the paper detecting device according to the present invention is applied, and FIG. 2 is a diagram showing how the paper introduced into the paper guide section in FIG. FIG. 3 is a schematic diagram showing a mode in which paper is ejected face-down; FIG. 4 is a schematic diagram showing a mode in which paper is conveyed in reverse;
FIG. 5 is a schematic diagram showing a mode in which the paper is caught and prevented from moving when the paper is conveyed in reverse;
Figures A and B are a top view and a side view partially showing the switching gate and the third paper detection actuator portion;
FIG. 7 and FIG. 8 are diagrams showing the operation mode of the third paper detection actuator. In the figure, 1 is an image forming apparatus, 21 is a third conveyance roller pair, 22 is a straight tray unit,
23 is a switching gate, 24 is a pair of paper ejection rollers, 29 is a third paper detection actuator, 33 is a reversing paper receiver,
36 is a reversing roller, 37 is a reversing rib guide, 38
39 is a curved paper guide, 40 is a forward conveyance path, 42 is a reverse paper path, 50 is a switching gate shaft, 51 is an actuator rotation shaft, 55 is a frame, 57 is an inverted L-shaped arm, and 61 is a detection arm,
64 is a reflective sensor.

Claims

[Scope of utility model registration request]

A conveying direction switching gate section for switching the conveying direction of paper, a switching gate shaft having the switching gate section fixedly attached and rotatably supported at both ends by a frame, and a switching gate shaft rotatably supported within the axis of the switching gate shaft. an actuating piece fixedly attached to the rotating shaft and rotatably protruding from a notch provided in the switching gate shaft; and an operating piece provided at one end of the rotating shaft. means for detecting the rotation of the rotation shaft, and detects the paper by the actuating piece contacting and rotating the paper passing through the conveyance direction switching gate part. A paper detection device characterized by comprising: