Paper feeding device and image scanning device

Abstract

A paper feeder includes a sheet supply unit that feeds sheets placed on a sheet placing part, a separating roller the separates the sheets fed by the sheet supply unit one sheet at a time and supplies each sheet to a sheet transportation path, a transportation roller that transports the sheets provided downstream of the separating roller and a link mechanism connected to the transportation roller via a transmitting unit. When the transportation roller rotates in a sheet transporting direction, the link mechanism swings so that a shutter opens the sheet transportation path and maintains an opened state. When the transportation roller rotates in a direction opposite to the sheet transporting direction, the link mechanism swings so that the shutter closes the sheet transportation path.

Description

Paper Feeding Unit and Image Scanning Unit This application is a divisional application of the invention patent application with the filing date of July 2, 2004, the application number of 200410062076.3, and the invention title of "paper feeding device and image scanning device". technical field The present invention relates to a paper feeding device, and more particularly, to a paper feeding device having a driving mechanism for a shutter for preventing improper operation by a user when setting many papers in a paper placing portion. Background technique Typically, an electrophotographic copier or facsimile machine includes an automatic document feeder (ADF). The ADF feeds a plurality of documents on a document tray, separates the plurality of documents one at a time, and passes each separated sheet to a scanner. The ADF includes: a pick-up roller that feeds a plurality of documents on the document tray; a separation device that separates the supplied documents one at a...

AI Technical Summary

Problems solved by technology

Therefore, the number of components increases, and it is necessary to construct a complicated control sequence so that the moving mechanism of the shutter is synchronized with other mechanisms such as a pickup roller and the like.

Cost of components and expensive to design and manufacture

In addition, it is difficult to reduce the size of the device due to the space required to place a mechanism including a solenoid or the like

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