JPH0241271U

JPH0241271U -

Info

Publication number: JPH0241271U
Application number: JP12035488U
Authority: JP
Priority date: 1988-09-13
Filing date: 1988-09-13
Publication date: 1990-03-22

Description

[Brief explanation of drawings]

第１図ａは本考案の画像形成装置の検出部近傍
を示す図、第１図ｂは半導体圧力センサの検出回
路を示す図、第１図ｃは圧電センサの検出回路を
示す図、第２図は画像形成装置の構成図、第３図
は検出装置にフオトインタラプタを用いた図、第
４図はフオトインタラプタ使用時の回路を示す図
、第５図は各センサを用いた場合の検出タイミン
グを示す図、第６図は用紙の撓みと荷重測定の模
式図、第７図は用紙の撓み強度による荷重と撓み
との関係を示す図、第８図ａ，ｂはカール矯正装
置を示す図、第９図は排紙ロール対の移動機構の
一例を示した図、第１０図は排紙方向切換機構を
示す図、第１１図は定着器の構成を示す図、第１
２図は従来の矯正装置を示す図である。１１……給紙カセツト、１２……給紙コロ、１
３ａ，１３ｂ……搬送ローラ、１８……押し上げ
板、１９……サバキ板、２０，２１……ターンガ
イド、２２……押圧部材、２３……用紙検出装置
、Ｐ……用紙。 FIG. 1a is a diagram showing the vicinity of the detection section of the image forming apparatus of the present invention, FIG. 1b is a diagram showing a detection circuit of a semiconductor pressure sensor, FIG. 1c is a diagram showing a detection circuit of a piezoelectric sensor, and FIG. The figure is a configuration diagram of the image forming apparatus, Figure 3 is a diagram using a photo interrupter as the detection device, Figure 4 is a diagram showing the circuit when using the photo interrupter, and Figure 5 is the detection timing when using each sensor. , FIG. 6 is a schematic diagram of paper deflection and load measurement, FIG. 7 is a diagram showing the relationship between load and deflection depending on the deflection strength of paper, and FIGS. 8 a and b are diagrams showing a curl correction device. , FIG. 9 is a diagram showing an example of a moving mechanism for a pair of paper discharge rolls, FIG. 10 is a diagram showing a paper discharge direction switching mechanism, FIG. 11 is a diagram showing the structure of a fixing device, and FIG.
FIG. 2 is a diagram showing a conventional correction device. 11...Paper feed cassette, 12...Paper feed roller, 1
3a, 13b...Conveyance roller, 18...Pushing plate, 19...Sabaki plate, 20, 21...Turn guide, 22...Press member, 23...Paper detection device, P...Paper.

Claims

[Claims for Utility Model Registration] A pair of fixing rolls, at least one of which is heated, a pair of transport rolls that are disposed near the fixing rolls and further pinch and transport the paper that has passed through the fixing rolls, and a paper output tray. In the image forming apparatus, the image forming apparatus includes: a detection means for detecting the bending strength of the paper; and an angle changing mechanism for changing the angle of a virtual plane connecting the centers of the gripping portions of the fixing roll and the conveyance roll with respect to the image forming apparatus main body. An image forming apparatus characterized in that the angle changing mechanism is operated based on detection information of the detection means.