JPS5922849A - Feeding apparatus for copying paper - Google Patents

Abstract

PURPOSE:To provide a compact and easily operatable double-surface copying apparatus by providing both a pressing member for discharging paper, and a transporting means for the paper in a discharged paper tray prepared in a copying machine. CONSTITUTION:Copying paper 16 placed on a paper feeding tray 5 is fed by a feed roll 4, and is fed by a registration 6. After images on a sensitive drum 1 is transferred, they can be fixed by a fuser 8 through a vacuum transport 7. Subsequently, the paper is discharged on a discharged paper tray 10 by a discharge roll 9. To copy another side of the paper, paper 16b is pressed by a pressing member 15, a bottom roll and a feed roll 12 are rotated to carry out the paper at the lowest position, and transport it to a registration 6 through a transport 17 then copy it as mentioned above. The paper 16a whose both surfaces are copied are stacked on the discharged paper tray 10 again.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copy paper feeding device for a copying machine, and particularly to a paper feeding device suitable for double-sided copying.

When double-sided copying is performed in a copying machine, the copy paper stored in the paper feed tray of the first paper feeding device is fed into the main body of the copying machine, first one side is copied, and then the other side is copied. Normally, copy paper is loaded on the paper feed tray of the first paper feed device, and from the paper feed tray, the copy paper 7P1 is fed to the copying machine main body, the second side is copied, and the copy paper is ejected to the output tray. .

Therefore, in such a case, it is necessary to separately provide a paper feeding device for double-sided copying, which has the disadvantage that the machine becomes larger accordingly. There is also a method of using seven of the plurality of paper feeders as the λth paper feeder for double-sided copying, but in most cases 1. Such a paper feeding device stores paper of a different size from the copy paper on which duplex copying is to be performed, and the paper must be removed from the paper feeding device and adjusted to the size of the paper to be duplexed. It is cumbersome to operate.

SUMMARY OF THE INVENTION It is, therefore, an object of the present invention to eliminate the above-mentioned drawbacks by providing a paper feeding device for double-sided copying that does not require an increase in the size of the machine and is simple to operate.

The inventor has devised a special method for the paper output tray that is originally provided in a copying machine, and has made the paper output tray also have the function of a paper feeding device for double-sided copying. It was noted that the objective could be achieved. Thus, according to the present invention, there is provided a paper ejection tray that accommodates the copy paper that is ejected after copying is completed with the copy paper R side facing back, and an angle copying machine that stores the copy paper that is housed in the tray as necessary. a conveying means capable of conveying the copy paper to the main body; and a suppressing member that is opened to store the copy paper in a paper ejection tray when the copy paper is discharged, and presses the paper when the copy paper is conveyed again to the copy machine main body. Provided is a copy paper feeding device characterized by comprising the following.

The paper feeding device of the present invention utilizes a conventional paper ejection tray and does not require any additional space, so that the entire copying machine can be made compact. Furthermore, when double-sided copying is performed, there is no need to perform operations such as removing and replacing paper. Moreover, the paper feeding device of the present invention is extremely versatile, having the function not only as an original paper ejection tray but also as a paper feeding device for simple one-sided copying.

The invention will now be further explained with reference to embodiments as shown in the drawings.

FIG. 1 schematically shows each operating section of a typical copying machine including the paper feeding device of the present invention. In FIG. 1, copy paper 16 placed on paper feed tray 5 is placed on feed roll
The leading edge of the paper is stopped by the paper sheet 6 which is stationary. The latent image on the photosensitive drum 1 is developed by the developing device 2, and the registration 6 rotates in synchronization with the developed image, thereby transferring the R image on the photosensitive drum onto the paper. After that, the paper passes through a vacuum transport 7 and is fixed by a user 8. On the other hand, the photosensitive drum 1 is cleaned by the cleaner 3.

The paper on which the image has been fixed is transferred by a JJI output roll 9 to an output tray 1 which also functions as a paper feeding device according to the present invention.
ejected toward 0. This ejection tray is arranged with an inclination as shown in the figure with respect to the direction of the copy paper to be ejected. Therefore, the copy paper is reversed and the copying is completed, and the 70th side is inside the tray 10. will be accommodated sequentially. Reference number -15 is a suppressing member according to the present invention, and when the copy paper is being ejected as described above, the member 15 is in the open state shown by the broken line in FIG. is stored in the paper output tray io.

In this way, when the copying of one side of the paper to be double-sided copied is completed and the stacking on the paper output tray 1o is completed, and when the other side of the paper is to be copied, the suppressing member 15 is lowered and presses the paper 16b. (See Figure 3). Paper output tray 1
A bottom roll 11 is provided at the bottom of the tom roll 11, and the paper 16b is pressed against the tom roll 11 by a pressing member 15. The pressing force of the suppressing member is provided by the elastic force of the spring or the weight of the suppressing member.

In this state, when the bottom roll 1 and the feed roll 12 rotate in the direction of the arrow in FIG. Registration 6 is then reached, and the same copying operation as for the first side described above is performed. At this time, the retard roll 13 rotates at a slow speed in the direction of the arrow or remains stationary.1. +j l
, the sheets fed in duplicate by the multiple rolls 11 are separated by the feed rolls 12 and the retard rolls 13. The means for conveying the copy paper to the main body of the copying machine is not limited to the roll means as shown in the figure, but other means such as a friction belt may also be used.

In this way, copying on both sides is completed, and the saw paper 16a is
The sheets are discharged from the JJli output roll 9 and stacked on the paper discharge tray 10 (see FIG. 9). At this time, since the paper 16b being conveyed to the copying machine main body is pressed by the pressing member 15, the papers 16a and 16b do not mix. If necessary, a sheet separating piece 18 may be provided at the end of the suppressing member to accommodate the sheets 16a and J 5 b in a more orderly manner.

'-+/The paper feeding device of the present invention can be used as a paper ejecting device for single-sided copying by keeping the suppressor stationary at the position shown by the solid line in Figure 1. It can also be used as a paper feeding JAIN for single-sided copying by opening the suppressing member to accommodate the paper/ζ and then feeding the paper as described above while pressing the paper with the suppressing member.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view schematically showing a typical copying machine including a paper feeding device of the present invention, and FIGS.
The figure is a side sectional view showing the paper feeding state of the paper feeding kl1ff of the present invention. 10: Paper discharge tray 11, 12, 13.14: Conveyance roll 15: Suppressing member Fig. 1 Fig. 2

Claims (1)

[Claims] A paper ejection tray that stores copy paper that is ejected after copying is completed with the copy finished side facing back, and a conveyor that can transport the copy paper that has been loaded into the tray back to the copying machine main body as necessary. and a suppressing member which is opened to store the copy paper in a paper ejection tray when the copy paper is ejected, and which presses the paper when the copy paper is conveyed again to the copying machine main body. Characteristic copy paper feeding device.