JPH0531442U - Automatic document feeder - Google Patents

Abstract

(57) [Abstract] [Purpose] In the automatic document feeder of the image input device, when the image input is interrupted, the document sandwiched between the drive rollers is collected. [Structure] By rotating the drive rollers 2 and 3 in the reverse direction, the document 4 sandwiched between the drive rollers 2 and 3 is immediately collected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a document feeding device used in an image input device with an automatic document feeding and discharging mechanism such as a copying machine or a scanner, and more particularly to a feeding system when reading a document is interrupted.

[0002]

[Prior Art]

 With the conventional image input device with an automatic document feeder, if you try to interrupt scanning while the originals are being continuously read, the original on the next page will be caught in the drive rollers of the automatic document feeder. However, the structure was such that the operator could not take it out as it was.

[0003]

[Problems to be solved by the device]

 For this reason, in the method in which the original placed on the drive roller is first read in the blank and then discharged, it is necessary to pass through the reading section, which requires extra time.

An object of the present invention is to provide an automatic document feeder which can immediately collect a document when it is desired to interrupt image input.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, an automatic document feeder according to the present invention is an automatic document feeder having a paper feed tray and a drive roller, and a paper feed tray for stacking originals. The drive roller feeds the originals one by one from the paper feed tray to the image input unit, sucks the next original in advance, and allows the operator to take the drawn original when the reading of the original is interrupted. In addition, it has the function of rotating in the direction opposite to that for inhalation and returning to the paper feed tray.

[0006]

[Action]

 In the automatic document feeder of the present invention, the driving roller for feeding the originals one by one to the image input unit does not only operate in the rotation direction at the time of normal feeding, but also slides between the driving rollers as soon as the reading is interrupted. It has a function that allows the original to be rotated in the opposite direction to return it to the input tray.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.

In FIG. 1, there is an automatic document feeding unit for placing a document on a paper feed tray 1, sandwiching the document 4 with drive rollers 2 and 3 and conveying the document 4 to an image image input unit 5 one by one. There is a transport belt 6 that discharges the document 4 to the discharge hopper 7 after the image of the document is read by the unit 5.

Further, the drive rollers 2 and 3 not only perform the operation in the rotation direction at the time of normal paper feeding, but also feed the original 4 already sandwiched between the drive rollers 2 and 3 at the time of interruption of reading. It has a function that allows it to rotate in the opposite direction to return to.

Next, the operation of each part when a document is caught on the drive roller will be described.

FIG. 2 is a view showing a case where a document is caught on a drive roller in an embodiment of the present invention.

The original 4 is sandwiched between the drive rollers 2 and 3 by the paper feed operation from the paper feed tray 1 by the drive rollers 2 and 3 in preparation for the next image reading.

If the operator wants to interrupt the image input in this state, in the conventional automatic document feeder, the document 4 had to be temporarily discharged through the image input section. By reversing the drive rollers 2 and 3, the original 4 can be returned to the paper feed tray 1 and immediately collected.

[0015]

[Effect of the device]

 As described above, the automatic document feeder of the present invention has an effect that the document can be immediately collected because the drive roller can be reversed when the image input is desired to be interrupted.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a state where an original document is sandwiched between drive rollers.

[Explanation of symbols]

 1 Paper Tray 2 Drive Roller 3 Drive Roller 4 Original 5 Image Input Section 6 Conveyor Belt 7 Paper Ejection Hopper

Claims (1)

[Scope of utility model registration request] 1. An automatic document feeder having a paper feed tray and a drive roller, wherein the paper feed tray is for stacking originals, and the drive roller is one original from the paper feed tray. Images are fed to the image input unit one at a time, the next original is sucked in advance, and when the reading of the original is interrupted, the sucked original is rotated and fed in the opposite direction of the suction so that the operator can take the original. An automatic document feeder having a function of returning to a tray.