JPS63165233A - Automatic document feeding device - Google Patents

Abstract

PURPOSE:To make the order of pages in a document agree with the order of pages of sheets of copying paper for a copying machine by providing a paper feeding tray on one side of a platen while providing a document passage means on the other side thereof. CONSTITUTION:Out of documents which are fed to a feed roller 7 means of a feed roller 14, only one sheet of the document on the lowermost part is separated by a separating roller 6, and moved to the top of a platen glass 1 by a feed roller 8. Then, the sheet is moved to the defined position of the platen glass 1 by a conveying belt 2 and, further, moved rightward and fed by a feed roller 10 to an inverting drum 11 and inverted. Here, it is selectively switched over in the direction of returning to the platen glass 1 via the feed roller 10 again and in the direction of a switchover claw 13, by means of a switchover claw 12. In the latter course, it is selectively switched over in the direction of being discharged to a paper discharge tray 15 through paper discharge rollers 20 and in the direction of being discharged to the top of a paper feeding tray 5 by means of paper discharge rollers 20 via the top of a conveying belt 2, by means of the switchover claw 13.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an automatic document feeder that feeds and conveys a sheet-like original to an exposure section of a copying device, and particularly to an automatic document feeder that feeds and conveys a sheet-like original to an exposure section of a copying device, and in particular, it is capable of copying a plurality of pages by repeatedly copying the original in page order. It has all or any of the functions of copying multiple copies, automatically copying both sides of the original, and reversing the page order of the original, and also has the functions of the copying machine to which it is combined. There are two types of copy paper discharge formats, and the page order will be correct no matter which one is attached.

BACKGROUND OF THE INVENTION In recent years, as copying machines have become more automated, many types of automatic document feeders have been produced. However, all of them have single or limited functions, and if they do not match the copy paper ejection format of the attached copying machine, the page order of the original and the page order of the copy paper will be different. There was a fateful constraint that they would not match.

Problems to be Solved by the Invention The present invention solves the above-mentioned drawbacks, and is multifunctional and can change the page order before copying and the page order after copying of the original, regardless of the copy paper output form of the attached copying machine. and the page order of the copy paper matches.

Means for Solving the Problems The automatic document feeder of the present invention is provided with a paper feed tray on one side of the platen and a document passage means on the other side, and has a means for transporting the document on the platen and a means for conveying the document to the paper feed tray. By providing a return means, a paper ejecting means for ejecting the original to the paper ejection tray, and a switching means for selectively guiding the original passing through the original passage means onto the platen, the paper feed tray, or the paper ejection tray, the above-mentioned method can be achieved. This solves the problem of.

Effects of the present invention With the above-described configuration, the document has a mode in which the document passes from the paper feed tray, passes through the platen, returns to the platen again, returns to the document tray again, and is ejected to the paper output tray, so it is multi-functional and the page order of the document can be changed. It is possible to match the page order of the copy paper of the copying machine.

Embodiment An automatic document feeder according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an automatic document feeder according to an embodiment of the present invention.

Reference numeral 1 denotes a platen glass of a copying machine, and the lower side of an endless conveyor belt 2 is in contact with the upper side of the platen glass. The conveyor heald 2 is driven forward and backward by a pair of tension rows 23, and its lower surface is brought into sliding contact with the platen glass 1 by a pair of presser rollers 4.

6 is a paper feed tray, 6 is a separation roller, and 8 is a feed roller. Reference numeral 9 denotes a pinch roller which works together with a feed roller 8.degree. 10, a reversing drum 11, and a conveyor belt 2 to feed the document. 12
．． Reference numeral 13 denotes a switching claw which is operated by a lensoid to switch the direction of the document. A feed roller 14 feeds the lowest document placed on the paper feed tray 6 to the feed roller 7. 16 is a paper discharge tray. 16, 17, 18, and 19 are interior walls or guide plates for the manuscript. Reference numeral 2o denotes two pairs of paper ejection rollers, one pair of which is provided at the return port above the document feed tray 6, and the other pair provided at the exit to the paper ejection tray 16. Separation roller 6, feed rollers 7, 8, 10, 14. The reversing drum 11, tension roller 3, and paper discharge roller 20 are driven by a plurality of motors (not shown). The document sent to the feed roller 7 by the feed roller 14 is separated by the separation roller 6, and moved onto the platen glass 1 by the feed roller 8, and then moved to a predetermined position on the platen glass 1 by the conveyor belt 2. When it is moved further to the right, it is reversed by the reversing drum 11 by the feed roller 1o. Here, the switching claw 12 selectively switches between the direction of returning to the platen glass 1 via the feed roller 1o again and the direction of the switching claw 13. Here, the switching claw 13 selectively selects the direction in which the paper is ejected to the ejection tray 16 through the ejection roller 20 and the direction in which the paper is ejected to the upper part of the paper feed tray 6 via the upper part of the conveyor belt 2 by the ejection row 220. Switch.

Next, an example of its application will be explained based on FIG.
To explain the drawings, a platen glass 1 is provided at the top of the copying machine main body 21, and although not shown, the present apparatus is mounted thereon.

Reference numeral 22 denotes a paper discharge tray of the copying machine, onto which a copy sheet 23 of an original placed on the platen glass 1 is discharged. Here, there are two types of copy sheets 2, A and Ross in Figure 2.
There are three discharge modes. As shown in the figure, the copy sheet is ejected with the copy side facing upward, and the next ejected copy sheet is stacked on top of the first ejected copy sheet. Therefore, as shown in Figure A, when copying starts from the last page (page 3 in the figure) and one page is copied at the end of copying, the page order of the copy sheet 23 is arranged. This type is hereinafter referred to as face-up.

Next, in the type shown in figure a, the copy sheet 23 is ejected downward. Therefore, in this type, copying starts from page 1, and the page order is arranged when the last page (page 3 in the figure) is copied. ,
This type is hereinafter referred to as face down.

Next, the operation accompanying the movement of the original 24 will be described with reference to FIG. In the feeding diagram, this operation is hereinafter referred to as "paper feeding" operation. Figure b shows a state in which the original 24-2 is stopped at a predetermined position on the platen glass 1 and the lower side thereof is copied by the exposure of the copying machine 21, hereinafter referred to as "exposure J operation". The original 24-3 is sent to the reversing drum 11 and the switching claw 12
This figure shows that the platen is turned over and moved again onto the platen glass 1 by switching the switch, and is referred to as ``reversal''operation'' below. In Figure d, the document 24-4 on the platen glass 1 is transferred to the reversing drum 11.
By switching the switching claws 12 and 13, the conveyor belt 2
The next figure is the conveyor belt 2.
This figure shows that the document 24-5 sent by is discharged by the discharge roller 2o to the top of the document 24 stacked on the paper feed tray 5, and both figures d and e are described as "circulation discharge" operation. The last figure f shows the document 2 that has passed through the reversing drum 11.
4-6 is the discharge roller 20 by switching the switching claws 12 and 13.
This is a diagram in which the document 24-7 is ejected onto the top of the document 24-7 that has already been ejected onto the paper ejection tray 15, and will be described as a "sheet ejection" operation below.

Next, some examples of document feeding modes of this apparatus are listed in the following table.

(Hereinafter referred to as "margins") To further explain the use of the white paper in these mode examples, Fig.
In this example, a document 24 with a single-sided image of a page is placed on the paper feed tray 6 with the image side facing down and the last page on top, and used in the first circulation single-sided exposure mode, and the second page is being copied. It is a diagram. The page order of the original 24 and the copy sheet 23 match, and the page order of the original 24 returned to the paper feed tray 6 also matches, so even after copying up to page 4, if you continue copying from page 1 again, the desired part will be respected. Can be cycled and copied continuously.

Next, Fig. 6 shows a face-up copying machine installed, a 4-page original 24 with a single-sided image placed on the paper feed tray 5 with the image side facing up and the last page at the bottom, and first in the first feeding mode. Figure a shows a state in which the original 24 is circulated only once without copying, and when this mode ends, the original 24 is turned into the reverse page. That is, the image surface of the original 24 is facing downward, with the final page at the bottom, and then copying is performed in the first circular single-sided exposure mode as shown in Figure b. Figure b shows page 2 being copied.Copy sheet 2
3 shows that the page order is correct. Here, the first cyclic single-sided exposure mode is repeated and the final repeated copying of the desired number of copies is performed from the last page in the first final single-sided exposure mode as shown in Figure 0, and the page order of the copy sheet is correctly aligned with the original original 24.
The original document 24-7, which is discharged in accordance with the state shown in FIG. It goes without saying that each of the three modes shown in FIG. 6 can be performed automatically and consecutively.

Next, in Fig. e, a face-up copying machine is installed, and a 4-page original 24 with a single-sided image is placed on the paper feed tray 6 with the image side facing upward and the last page at the bottom, and a second circular exposure is performed. Here is an example used in mode. In this case as well, the page order of the original 24 and the page order of the copy sheet 23 correctly match.

Next, Fig. 7 shows a face-down copying machine installed, four double-sided images, that is, eight pages of originals 24, loaded on the paper feed tray 5 with the first page facing down and at the bottom, and in the first circular double-sided exposure mode. In the example used, the page order of the original 24 and the copy sheet 23 match correctly in this case as well. Although not shown below, when installed in a face-up copying machine, there is one in the paper feed tray 5.
The original 24 and the copy sheet 23 are stacked so that the pages face upward and are at the top, and the page orders of the original 24 and the copy sheet 23 match correctly in the first double-sided exposure mode.

In addition, if the page order of the original 24 is reversed for some reason, the first and second reverse feed modes can be used to restore the correct page order, count the number of original pages, or have the machine recognize whether the original is an odd number or an even number. You can also do it.

This is useful when copying an odd number of single-sided image originals onto both sides of the copy sheet 230 and determining whether a blank page is to be the first or last page of the copy sheet 23. Also, in the first and second normal feed modes, it is possible to count the number of originals and to determine whether the originals are odd or even.

The detailed description of the invention is only a part of one embodiment of the invention, and it goes without saying that there are other modes and usage examples other than those described.

In this way, the device of the present invention can automatically match the page order of the original and the copy sheet regardless of the type of copying machine to which it is installed, and can also reverse the order of other pages and check the number of original sheets before copying. It is also a multifunctional automatic document feeder capable of circulating documents and double-sided exposure. Also, the fact that the document is circulated and finally ejected to the paper output tray 16 allows the operator to recognize that the copying operation has been completed, and allows the document for the next copying operation to be quickly placed on the paper feed tray 5. Probably one of the. Furthermore, the present invention provides an automatic document feeder having a simple structure and high reliability.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional configuration diagram of an automatic document feeder according to an embodiment of the present invention, FIG. 2 is a front view illustrating the paper ejection mode of a copying machine to which the device shown in FIG. 1 is installed, and FIG. 3 is the same as that shown in FIG. Figures 4 to 7 are diagrams for explaining the page order of originals and copy sheets when the device in Figure 1 is attached to the copying machine in Figure 2. be. 1...Platen glass, 2...Transport belt, 5...Paper feed tray, 11...Reversing drum, 12...Switching claw , 13...
Switching claw, 15... Output tray, 2o...
- Paper ejection roller, 24... Original. Name of agent: Patent attorney Toshio Nakao and 1 other person
Figure 2 (a) 6 mouths) Figure 5 (tλ, n (b) Figure 5 height 6 figure)

Claims (3)

[Claims] (1) A paper feeding means for feeding originals onto the platen from a paper feeding tray provided on one side of the platen and capable of storing a plurality of originals, and a paper feeding means provided on the other side of the platen for feeding originals from the paper feeding tray, which is provided on the other side of the platen. a loop-shaped document passage means that allows a document that has been fed and passed through the platen to be conveyed onto the platen again; a conveying means that conveys the document on the platen to the paper feed tray side or the opposite side; returning means for returning the document to the upper part of the paper feed tray while passing through the document passage means;
a paper ejection means for ejecting a document onto a paper ejection tray provided substantially above the platen while passing through the document passage means; and a means for discharging the original onto the platen or returning the document disposed midway through the document passage means. or a switching means for selectively guiding the paper to any one of the above-mentioned paper ejecting means. (2) The automatic document feeder according to claim 1, further comprising a first reverse feeding mode in which the document is returned from the paper feed tray to the paper feed means by the paper feed means and the return means. . (3) Following the first reverse feeding mode, a circulation exposure mode is performed in which the original is repeatedly circulated by the paper feeding means, the original passage means, and the returning means, and finally the paper is ejected by the paper feeding means and the paper ejecting means. The automatic document feeder according to claim 2, characterized in that the automatic document feeder performs a final exposure mode in which the document is ejected to a tray.