JPS62103360U

JPS62103360U -

Info

Publication number: JPS62103360U
Application number: JP19511685U
Authority: JP
Priority date: 1985-12-20
Filing date: 1985-12-20
Publication date: 1987-07-01

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の平面図、第２図は
第１図のドライブプーリの詳細斜視図、第３図は
ワイヤがドライブプーリに与える力関係の説明図
、第４図は本考案の第２実施例の要部平面図、第
５図は従来の画像読取装置の概略構成図、第６図
はその一部の平面図、第７図はドライブプーリ径
と枠体の速度変動率との関係図である。３…枠体、８，８′…ワイヤ、９，９′…テン
シヨンプーリ、１１…ドライブ軸、１２，１２′
…テンシヨン軸、２０，２０′…ドライブプーリ
、２２，２２′…検知手段、２３，２３′…駆動
手段。 Fig. 1 is a plan view of one embodiment of the present invention, Fig. 2 is a detailed perspective view of the drive pulley shown in Fig. 1, Fig. 3 is an explanatory diagram of the force relationship exerted by the wire on the drive pulley, and Fig. 4 is a diagram of the present invention. A plan view of the main parts of the second embodiment of the invention, FIG. 5 is a schematic configuration diagram of a conventional image reading device, FIG. 6 is a plan view of a part thereof, and FIG. 7 is a diagram showing drive pulley diameter and frame speed fluctuations. It is a relationship diagram with the rate. 3... Frame body, 8, 8'... Wire, 9, 9'... Tension pulley, 11... Drive shaft, 12, 12'
...Tension shaft, 20, 20'... Drive pulley, 22, 22'... Detection means, 23, 23'... Drive means.

Claims

[Scope of Claim for Utility Model Registration] (1) In an image reading device that sequentially reads image information of a document while moving a frame body containing document reading means in the sub-scanning direction, the image information on the document is located on both sides of the document mounting table in the sub-scanning direction. a drive shaft and a tension shaft provided in a direction perpendicular to the direction and parallel to the document mounting table;
A drive pulley is fitted onto the drive shaft so as to be slidable in the axial direction thereof and has a spiral groove formed on its surface; An image reading device comprising: a wire fixed to a wire; and a tension pulley rotatably inserted into the tension shaft to support the wire. (2) It is characterized by comprising a detection means for detecting displacement in a direction perpendicular to the longitudinal direction of the wire, and a means for moving the drive pulley in the axial direction of the drive shaft in accordance with a detection signal from the detection means. The image reading device according to claim 1 of the utility model registration claim.