JPH0442300B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic document feeder installed in a copying machine body.

[Conventional technology]

For example, in an automatic document feeder, the document on the document feed table is fed by a paper feed roller, separated one by one by a double feed prevention roller, and passed through a paper guide to the glass surface of the copying machine body. The paper is introduced between the paper and the moving conveyor belt, and after being exposed to light on the glass surface, the paper is fed to a certain processing section so that it is sent out through the discharge port and onto the paper discharge tray by the re-movement of the conveyor belt, and is discharged after processing. The apparatus is equipped with a paper feeding device including a driving roller and a driven roller pressed against the driving roller across the paper path for applying a conveying force to the paper midway through the paper path.

However, the clamping rollers of the above-mentioned paper feeding device cannot be released from the clamping rollers without disassembling their mounting parts, and therefore, it is difficult to deal with problems such as jams occurring between the rollers. Not only was it hot, but there was a risk that important documents, etc., would be damaged or wrinkled when removed. Therefore, an automatic document feeder was devised that was equipped with a swinging lever that moved one of the rollers away from the other roller by operating it from outside the exterior of the device.
(No.), this had a configuration in which the operating end of the swing lever, which was unnecessary except when handling jams, always protruded outside the copying machine, detracting from its appearance.

[Purpose of the invention]

It is an object of the present invention to provide a paper feeding device that can simplify the handling of the above-mentioned troubles and also allows paper to be taken out with as little damage as possible. Another object of the present invention is to provide an automatic document feeder that has a good external appearance, eliminates the need to provide a new space for installing a swing lever, and can be miniaturized. .

[Structure of the invention]

In order to achieve the above object, the present invention includes a document feeding table on the upper surface, a direction change guide for reversing the document fed from the document feed table, and a path on the upstream side of the direction change guide. A pair of rollers provided on the top surface of the copying machine body and a pair of rollers that supply the document in the direction change guide to a glass surface formed on the top surface of the copying machine body are housed in an exterior body that is provided on the top surface of the copying machine body so as to be freely tiltable. In the feeding device, a swing lever for separating one of the rollers from the other roller is provided in a gap between the direction change guide and a side wall of the exterior body facing the direction change guide, and an operating end of the swing lever is provided in the side wall. The outer surface of the exposed portion is formed of a decorative plate having a similar shape to the notch, and is flush with the outer surface of the side wall.

〔Example〕

Next, the present invention will be explained using an automatic document feeder shown in the accompanying drawings as an example.

Reference numeral 1 denotes a copying machine main body, and 2 an automatic document feeder which is attached to the upper surface of the copying machine main body 1 via a hinge member (not shown) so as to be tiltable. As shown in FIGS. 1 to 3, the automatic document feeder 2 includes a document feed tray 3 on the top surface, a direction change guide 7 for reversing the document 4 fed from the document feed tray 3, and a direction change guide 7 for reversing the document 4 fed from the document feed tray 3. A pair of nipping rollers 8a and 8b are provided on the upstream side of the conversion guide 7 with a passage a in between, and supply the document 4 in the direction conversion guide 7 to the glass surface 9 formed on the top surface of the copying machine main body 1. It is housed in an exterior body 19 that is provided on the upper surface of the machine body 1 so as to be freely raised and folded, and is operated as follows. That is, the document feed tray 3
A document 4 set on top is sent out by a paper feed roller 5, and one sheet is separated by a double feed prevention roller 6 and introduced into a direction change guide 7. In this direction change guide 7, the document 4 is given a conveying force by pinching rollers 8a and 8b that press the document 4 across the document path a, and is pressed against the glass surface 9 of the copying machine main body 1 and the conveyor belt that runs along it. 10 and is supplied onto the glass surface 9. The document is stopped on this glass surface 9 for exposure. This stopping is effected by the protrusion of a stopper 11 provided at the end of the glass surface 9. At the end of the exposure or before the end of the exposure, the stopper 11 retracts from the glass surface and the conveyor belt 10
is restarted and the document is sent out to a paper ejection tray (not shown) through paper ejection rollers 12a and 12b.

Reference numeral 13 denotes a pair of rollers 8a and 8b which are pressed together with the document path a in between in the direction change guide 7.
It shows the actuating means for releasing the crimp. The actuating means 13 is pressed by a spring against a lower roller 8b connected to a drive source (not shown), and can be operated so as to separate the upper roller 8a, which rotates as a result, against the spring. ing.

Specifically, as shown in the first figure, when one end is pressed inward into the gap between the direction change guide 7 and the side wall of the exterior body 19 facing it, the other end is pressed against the spring 14.
The swing lever 15 that swings upward against the
7 via pin 18. Swing lever 15
The operating end 15a is exposed through a notch 20 provided in the side wall of the exterior body 19, and the outer surface of the exposed portion is formed of a decorative plate having a similar shape to the notch 20, and the outer surface of the side wall is similar to the outer surface of the side wall. The swinging end 15b is flush with the upper roller 8.
It is designed to be able to be locked onto the inner surface of the roller shaft of (a), and one of the nipping rollers can be released from the pressure bond by an operation outside the exterior.

In the above embodiment, if a jam occurs between the drive roller and the driven roller that is spring-biased to press against the drive roller across the document path a during operation of the automatic document feeder, the document To take it out, first, press the operating end 15 of the swinging lever 15, which constitutes a part of the exterior 19 of the automatic document feeder 2.
Place your hand on point a and press inward as shown by the arrow in Figure 1. As a result, the swinging lever 15 rotates about the pin 18 as a fulcrum against the spring 14, so that the swinging end 15b, which is positioned so as to be able to engage with the inner surface of the roller shaft of the upper roller 8a of the nipping roller, It swings upward as shown by the arrow, lifts up the upper roller 8a, and separates it from the lower roller 8b. This completes the crimping release. Next, while maintaining this state, the jammed original can be easily removed without damaging it by grasping the rear end of the jammed original from the original supply table side with one free hand and pulling it out. After this removal, if the hand is released from the operating end 15a of the swing lever 15 and the pressing force is released, the swing lever 15 will return to its initial state by the action of the spring 14.

In the above embodiment, the paper feeder on the paper feed side of the automatic document feeder was described, but it is of course applicable to the paper feeder on the paper ejection side as well. It can also be applied to paper feeding devices.

〔Effect of the invention〕

As described above, the present invention includes a document feeding table on the upper surface, a direction change guide for reversing the document fed from the document feeding table, and a direction change guide provided on the upstream side of the direction change guide with a path in between. An automatic document feeder in which a pair of rollers for feeding a document in a conversion guide onto a glass surface formed on an upper surface of a copying machine body is accommodated in an exterior body that is movably provided on the upper surface of a copying machine body, A swing lever for separating one of the rollers from the other roller is provided in a gap between the direction change guide and a side wall of the exterior body facing the same, and an operating end of the swing lever is provided in a notch in the side wall. and forming the outer surface of the exposed part with a decorative plate having a similar shape to the notch,
Moreover, since it is configured flush with the outer surface of the side wall, paper such as jammed originals generated between the nipping rollers can be easily taken out by an external operation without removing the exterior and without damaging it. becomes possible.

Further, according to the present invention, since the swing lever is provided by effectively utilizing the space between the direction change guide and the side wall, there is no need to provide a new space for the swing lever, and the device can be easily Not only is it possible to downsize, but the operating end of the swing lever, which is activated only when a jam occurs between the rollers and does not need to be operated during normal times, can be formed as if it were part of the exterior body. Therefore, it has various excellent effects such as an extremely good appearance.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a sectional view of a main part, FIG. 2 is an external perspective view, and FIG. 3 is a schematic sectional view showing the internal structure of an automatic document feeder. 1... Copying machine main body, 2... Automatic document feeder,
8a, 8b...Pinching roller, 13...Crimping release means, 15...Swinging lever, 15a...Operation end, 1
5b... Swinging end, 14... Spring, 17... Skeleton,
18...pin, 19...exterior body.

Claims (1)

[Claims] 1. A document feed tray is provided on the upper surface, and a direction change guide is provided for reversing the document fed from the document feed table, and a direction change guide is provided on the upstream side of the direction change guide with a path in between, and the document in the direction change guide is An automatic document feeder in which a pair of rollers that feed a glass surface formed on the upper surface of the copying machine body are housed in an exterior body that is movably provided on the upper surface of the copying machine body,
A swing lever for separating one of the rollers from the other roller is provided in a gap between the direction change guide and a side wall of the exterior body facing the same, and an operating end of the swing lever is provided in a notch in the side wall. An automatic document feeder characterized in that the outer surface of the exposed portion is formed of a decorative plate having a similar shape to the cutout portion, and is flush with the outer surface of the side wall.