JPH0255227U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a functional block diagram showing the basic structure of an automatic document feeder according to this invention, FIG. 2 is a sectional view showing a schematic structure of an automatic document feeder which is an embodiment of this invention, and FIG. Similarly, FIG. 4 is a block diagram showing the relationship between the controller and its input/output section, FIG. 4 is an explanatory diagram of document feeding timing control according to this embodiment, and FIGS. 5 and 6 are diagrams showing sequence operation control by the controller in this embodiment. FIG. 7 is a flowchart showing the processing, FIG. 7 is a timing chart showing the operation timing of each part in the automatic document feeder and the copying machine main body according to this embodiment, and FIG. It is an explanatory view of various sizes. 1... Automatic document feeder (ADF), 2... Copying machine main body, 3... Original table, 4... Original set sensor, 6... Calling roller, 7... Calling roller, 8... Pull-out roller (feeding) For paper), 9...
Separation roller, 13... Separation belt, 17... Contact glass, 18... Registration sensor, 21...
...Transport belt, 22...Document scale, 25...
Pull-out roller (for paper ejection), 26... Driven roller, 28... Paper ejection sensor, 40... Controller, 41... Size width sensor, 42... Timing pulse sensor, 45... Document feed control mode switching switch , 46... Conveyance motor, 47... Paper discharge motor, 48... Calling solenoid, 48... Paper feeding solenoid.

Claims (1)

[Scope of Claim for Utility Model Registration] A paper feeding unit that feeds the originals set on the original table onto the contact glass of a copying machine one by one, and a conveyor belt that transports the originals fed by the paper feeding unit. a conveyance section that conveys the document onto the contact glass by the conveyance section; and a paper discharge section that discharges the document conveyed by the conveyance section to the outside. transported by a transport unit and stopped at an exposure position where the rear end is aligned with a reference position set at the end on the paper feed unit side on the contact glass;
An automatic document feeder configured to transport the original to the paper ejecting section by the transporting section after completion of exposure, comprising: a document leading edge detecting means for detecting the leading edge of the original that has reached the paper ejecting section; a first document feed control means that causes the paper feed section to start feeding the next document when the leading edge of the document is detected by the document feed section; a document size detection means for detecting the size in the direction; and a second document feed control means for changing the timing at which the paper feed section starts feeding the next document according to the size detected by the means. An automatic document feeder comprising: a switching device for arbitrarily switching and operating either one of the first document feed control device and the second document feed control device.