JPH0363149U

JPH0363149U -

Info

Publication number: JPH0363149U
Application number: JP12501089U
Authority: JP
Priority date: 1989-10-25
Filing date: 1989-10-25
Publication date: 1991-06-20

Description

[Brief explanation of the drawing]

第１図ないし第５図は本考案による画像形成装
置の一実施例を示す図であり、第１図は複写機の
概略構成図、第２図はレジストローラ上、レジス
トローラ下の駆動機構を示す斜視図、第３図は原
稿台の平面図、第４図はコンタクトガラスの裏側
下方の反射型センサの透視斜視図、第５図は制御
装置の回路図、第６図は本考案の他の実施例を示
す原稿台の平面図である。第７図は従来の画像形
成装置の原稿台の平面図、第８図は従来の他の画
像形成装置の原稿台の平面図、第９図は第８図の
原稿台の指示体の駆動機構の構成図である。３０，３５……原稿スケール、３０ａ，３５ａ
……段差、３１……原稿、４６……転写紙。 1 to 5 are diagrams showing an embodiment of an image forming apparatus according to the present invention. FIG. 1 is a schematic diagram of a copying machine, and FIG. 2 shows a drive mechanism above and below a registration roller. 3 is a plan view of the document table, FIG. 4 is a transparent perspective view of the reflective sensor below the back side of the contact glass, FIG. 5 is a circuit diagram of the control device, and FIG. 6 is a plan view of the document table. FIG. 3 is a plan view of a document table showing an embodiment of the present invention. FIG. 7 is a plan view of a document table of a conventional image forming apparatus, FIG. 8 is a plan view of a document table of another conventional image forming apparatus, and FIG. 9 is a drive mechanism of the indicator of the document table of FIG. FIG. 30, 35...Manuscript scale, 30a, 35a
...Step, 31...Manuscript, 46...Transfer paper.

Claims

[Scope of utility model registration request]

The transfer paper is transported so that the center line of the paper always follows the same straight path regardless of the size, and a document scale is installed only on one side of the document table on the home position side to indicate the document size. and a conveyance roller which is arranged in the conveyance path of the transfer paper and can rotate intermittently when driving the transfer paper between the two sides.
In the image forming apparatus, the image forming apparatus includes a position detection sensor that detects a home position of a scanner that reads and scans a document, and a control means that controls rotation of the conveyance roller at a predetermined timing based on a detection signal from the position detection sensor. A document size detecting means is provided, which forms a step on a document scale at a position corresponding to each document size, and detects the size of the document by detecting the document abutted against any of the steps. An image forming apparatus characterized in that the control means varies the rotation timing of the conveyance roller based on a detection signal from the image forming apparatus.