JPS60247256A - Paper conveying system of copying machine - Google Patents

Abstract

PURPOSE:To obtain double-side copies corresponding to the rounding sequence of one-side originals even if a partition, etc. are not inserted between the same by providing the 1st feeder which delivers the paper contained in the 1st tray to a copying section and the 2nd feeder which delivers the upset paper contained in the 2nd tray to the copying section. CONSTITUTION:The guide pawl of a conveying path selector 220 is set to an arrow (a) side and the paper feeder 211 is driven only for the odd-numbered sheets among the one-side originals on the original tray 101 so that the paper on the tray 210 is fed to the copying section and the copied paper is upset and is contained in the tray 230 in the operation of the 1st round of an automatic original delivery device 100. The guide pawl of the selector 220 is set to an arrow (b) side and the paper feeder 231 is driven for the even-numbered sheets of the originals so that the paper copied on the opposite side and contained in the tray 230 is fed to the copying section in the operation of the 2nd round of the original. The paper is subjected to copying on the rear side and is then discharged from the conveying path PAP4 onto a discharge tray 240.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a paper conveyance method for a copying machine, and in particular to a paper conveyance system for a copying machine, and in particular, a paper conveyance method that is effective for obtaining double-sided copies from single-sided originals that are loaded into an automatic document feeder and circulated sequentially. Concerning a method of transporting copy paper.

[Prior art]

Conventionally, when obtaining a double-sided copy with a page configuration corresponding to the circulation order from a single-sided original using the above-mentioned automatic document feeder, every other one of these originals is processed in the first round of the above-mentioned circulation. Then, after making copies on the paper stored in the paper tray in advance, this is stored in the -H duplex tray, and in response to the second circulation of the next manuscript, it is stored in the paper tray. Normally, copies were made alternately between the Niihiko paper stored in the tray and the paper stored in the duplex tray, that is, the paper that had already been copied on one side, and then ejected.

However, if such a method is used, it is certainly possible to obtain a double-sided copy with a one-page configuration that corresponds to the circulation order of the single-sided original as described above, but only the single-sided copy is made in two copies. In the end, some means had to be taken to insert partitions between each copy of the copy in the tray used to store it. If this partition were not provided, it would not be possible to accurately determine whether or not some copies have been made, for example when double feeding of sheets occurs.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a paper conveyance system for a copying machine that can reliably make double-sided copies one copy at a time and has an easy configuration that corresponds to the circulation order of single-sided originals without using the above-mentioned partitions or the like. do.

[Structure of the invention]

The present invention includes a first tray in which sheets are stored in advance, a first feeder that feeds the sheets stored in the first tray to a copying section, a reversing means for reversing the sheets once copied, and A second tray for temporarily storing the inverted paper and a second feeder for feeding the paper stored in the second tray to the copying section again in a first-in, first-out manner are provided, respectively, as described above. When the automatic document feeder is driven for the first round, the first feeder is driven only for odd-numbered or even-numbered single-sided documents, and the sheets fed and copied are passed through the reversing means. The documents are stored in the second tray, and during the second drive of the automatic document feeder, the second feeder is driven for the even or odd single-sided documents, and the sheets are fed and copied. The printed paper is ejected to the ejecting section at any time.

〔Effect of the invention〕

Therefore, according to the paper conveyance system of the copying machine according to the present invention, it is possible to reliably make one desired double-sided copy corresponding to each binary circulation of the original without adding the above-mentioned partitioning means. You will be able to collect them one by one.

〔Example〕

FIG. 1 shows the configuration of an embodiment of a copying machine that implements the paper conveyance system according to the present invention.

In other words, in FIG. 1, reference numeral 100 denotes a document tray 101 that can store a plurality of original documents (hereinafter explained assuming a single-sided document) OR, and the tray 101.
This is a well-known automatic document feeder that includes a document feeder 102 that sequentially feeds original documents stored in the OR one by one starting from the bottom of the feeder. The apparatus 100 is in a so-called normal rotation mode, and after moving the original OR sent out by the feeder 102 as shown by the arrow in the figure and setting it on the platen glass PG of the copying machine main body 200, which will be described later,
Move R as shown by the arrow in the figure to rotate the document tray 1.
Assume that the operation (5) of re-storing to 01 is repeatedly executed. In addition, the OR shown in FIG.
P is a conveyance path of the original OR in this original feeding device 100. However, illustrations of the conveyance rollers and the like that move the original OR along the conveyance path ORP as described above are omitted.

The copying machine main body 200 also includes a photoreceptor drum 201 and a charging corotron 2 for pre-charging the photoreceptor drum 201.
02, a lamp p203 that irradiates light onto the document OR moving on the platen glass PG; an optical system 204m that exposes the surface of the photoreceptor drum 2010 with this reflected light;
04b, 204e, the photosensitive drum 20 is
A developing device 20 that develops an electrostatic latent image formed on the surface of
5. A transfer corotron 206 that transfers this developed image onto the paper PA that is conveyed along the conveyance path PAP 1 or PAP 3 by a conveyance roller (not shown); and a static neutralization device that neutralizes the surface of the photoreceptor drum 201 after the transfer. Corotron 207, photosensitive drum 201 after the static electricity removal
0 surface, and a fixing device 209 that fixes the transferred image by heating the transferred paper PA (6).
a well-known copying section consisting of a copying section, a paper tray 210 in which the paper PA is stored in advance, a paper feeder 211 that feeds the paper PA stored in the tray 210 to the transport path PAP I, and an electromagnetic The fixing device 20 has a guide claw that is driven in the direction of arrow a or b by power.
A conveyance path switching device 220 that switches the conveyance path of the paper PA after passing through the conveyance path PAP;
A paper tray 230 that stores the paper when it is transported to the second side.
Then, the paper feeder 231 feeds the paper sheets FA stored in the tray 230 one by one to the transport path PAP 3 from the bottom one, that is, in a first-in, first-out method, and is discharged via the paper transport path PAP 4. The output tray 240 is configured to include a discharge tray 240 that collectively accommodates the paper sheets PA, and the paper sheets PA as shown below are arranged in accordance with the operation mode specified by the operator via the operation panel (not shown).
Execute transport control of A.

Hereinafter, an example of this control operation will be described in detail with reference to the flowchart of FIG. 2.

Now, the above operation No.J? "Single-sided original → double-sided copy mode" is specified by the operator via a channel (not shown), and the document tray 101 of the automatic document feeder 100
If the total number of originals stored in the copying machine 200 is entered manually, the main body 200 of the copying machine (actually, an arithmetic processing unit (not shown) disposed inside the machine) determines this (step 1100\above). The number of original OR sheets is input and stored as appropriate (step 1200).

Now, after this, feeder 1 of automatic document feeder 100
In step 1300), when the bottommost one of the originals OR is set on the platen glass PG, the copying machine main body 200
By comparing the number of times the document was set this time (supervised by an appropriate counter, etc.) and the number of stored documents, it is determined that the document set this time was caused by the first round operation of the automatic document feeder 100. (Step 140
0), set the guide claw of the above-mentioned conveyance level crossing switching device 220 to the arrow a side (Stella 7'1410).

The copying machine 200 then determines that this set original is the odd numbered original among the originals OR loaded in the original tray 101 (step 14).
20) Drive the paper feeder 211 (step 1)
430)) After sending the paper FA stored in the tray 210 to the copying section and performing a well-known copying process on it (Stella 7
'1440) The paper PA is reversed through the transport path PAP 2 and stored in the paper tray 230 (step 1450).

Further, in step 1420, if it is determined that the set document is an even-numbered document, the above-mentioned feeding and copying of paper PA is not performed, and one page/feet is
102 to further send out the next document (step 1300).

The operations from step 1300 to step f1450 of the automatic document feeder 100 and the copying machine main body 200 are repeated until the document (9) is set by the second operation of the document feeder 1000. executed.

As a result, the paper tray 230 sequentially stores only the sheets that have been copied in correspondence with the odd-numbered originals OR.

Then, when the first document of the second round of original OR is set on the platen glass PG, the copying machine main body 200 determines whether the current document It is determined that the setting is due to the second round operation of the automatic document feeding/outputting device ioo as described above (step 1400), and the document set this time is still the last one of the second round of the same document OR. (Stella 7'1500), and the conveyance level crossing switching device 22
Next, set the guide claw of 0 to the side indicated by the arrow (Step 1)
510). Next, this copying machine 200 determines that this set original is an even-numbered one of the originals OR (step 1520 - the first original of this second round does not apply), and then The feeder 231 is driven (step 1530) to feed the paper PA (10) stored in the tray 230 to the copying section via the conveyance path PAP 3, where it is copied again (on the back side). After (step 15
40) The same paper PA is now discharged through the conveyance path PAP 4 and stored in the discharge tray 240 (step 15).
50). Further, in step 1520, if it is determined that the set document is an odd-numbered document, such as the first document, the feeder 102 is operated without performing the above-mentioned feeding and copying of the paper PA. The document feeder 100 is then commanded to drive and feed the next document (step 1300). Stella 7"1 of such automatic document feeder 100 and copying machine main body 200
The operations from step 300 to stage f1550 are also repeatedly executed until the last one of the second round of originals OR is set.

Then, when the last turtle of the second round of the original OR is set on the platen glass PG (total number of originals set =
After determining this (step 1500), if the number of originals OR is an even number, the copying machine main body 200 performs the above-mentioned (11) L fr-Stella 7'1510-155o. Similar operations (steps 1610 to 1623) are finally executed to finish the drive, and if the number of originals OR is an odd number, the feeder 231 is driven as shown in Stella f1631 to 1632. The last sheet PA remaining on the tray 230 is ejected without being copied, and the driving is completed.

In this way, by performing the above-mentioned conveyance control on the paper PA, a double-sided copy having a page configuration corresponding to the circulation order of the original OR to be copied is ejected and stored in the ejection tray 240. .

Note that the configuration of the copying machine shown in FIG. 1 and the operation of the copying machine shown in FIG. When duplexing a single-sided original fed and set by an automatic document feeder such as the above, there is provided a means for reversing the sheet once copied, a tray for temporarily storing the sheet, and a tray for storing the sheet temporarily. It is equipped with at least a feeder for feeding the stored sheets to the copying section again in a first-in, first-out method (12), and when the automatic document feeder is driven for the first round, the odd-numbered sheet of the single-sided document is Alternatively, copies are made only for the even-numbered sheets, and this paper is reversed by the reversing means and temporarily stored in the tray, and when the same document feeder is driven for the second time, the even-numbered sheets of the single-sided original are Or, of course, any other configuration and operation mode may be used as long as the feeder is driven for the odd-numbered feeder and the sheets fed and copied can be ejected to the ejection section at any time. .

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the structure of an embodiment of a paper conveyance system of a copying machine according to the present invention, and FIG. 2 is a 7o-chart showing an example of the operation of the copying machine shown in FIG. 100... Automatic document feeder, 101... Document tray, 102... Document feeder, 200... Copying machine main body, 201... Photosensitive drum, 202.206
. (13) 207... Corotron, 203... Run f, 204
...Optical system, 205...Developing device, 208...Cleaning device, 209...Fixing device, 210,230
．． ...Paper tray, 211, 231...Paper feeder, 220...Transportation level switching device, 240...Ejection tray, OR...Original, PA...Paper. (14)

Claims (1)

[Claims] A paper conveyance method for a copying machine that performs double-sided copying of a single-sided original loaded in an automatic document feeder and moved on a platen while sequentially circulating through an appropriate conveyance path of the feeder. , a first tray in which copy paper is stored in advance;
a first feeder for feeding the paper stored in the first tray to a copying section; a paper reversing means for reversing the paper once copied in the copying section; and a paper reversing means for temporarily storing the inverted paper. and a second feeder that feeds the paper stored in the second tray to the copying section again in a first-in, first-out manner. At the time of driving, the first feeder is driven only for the odd or even numbered one-sided originals, and the sheets fed by this feeder and copied are stored in the twentieth tray via the sheet reversing means, and the same When the automatic document feeder is driven for a second time, the second feeder is driven for the even numbered or odd numbered one-sided originals so that the sheets fed and copied are discharged as needed. A copying machine paper conveyance system characterized by: