JPS6180171A - Copy machine with automatic document feeder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a copying machine with an automatic document feeder.

(Prior Art) A copying machine is known that is equipped with an automatic document feeder that automatically feeds a plurality of pages of documents in sequence when copying a page document.

This type of automatic document feeder is provided at the top of the copying machine, and includes a document feeding section that feeds the inserted document.
It is equipped with a document conveyance section that conveys the document sent from this section onto a document scanning section, for example, a contact glass of a copying machine, and discharges it to a document discharge section after illumination scanning of the R document. The document transport section can be rotated to open and close relative to the contact glass.

Some automatic document feeders of this type have a mode in which the feed mode can be selectively switched between an ADF (auto document feed) mode and an SADF (semi-auto document feed) mode.

Here, ADF mode means that when originals are set one by one in the original feeding section, each original is automatically pressed by the automatic document feeding device by pressing the print button of the copying machine each time. This is a mode in which when a plurality of originals are fed and conveyed and sent simultaneously, the plurality of originals are automatically fed and conveyed one after another by pressing the print button only once.

On the other hand, with +' SADF mode, each document is processed one by one.

This is a mode in which originals are automatically fed and conveyed one by one by pressing the print button of the copying machine only once when set in the original feeding unit.

By the way, in an automatic document feeder that makes it possible to switch the document feed mode as described above, double-sided documents such as those shown in FIG.
+Pg**Pgs tPgs) If the documents are stacked one on top of the other in order from the bottom and set in the document feeder, if the mode is set to ADF, this mode will change as described above. Since the mode is such that multiple originals are fed and conveyed one after another by pressing the print button once, the Pgx image is printed on the front side of the transfer paper S□, and the Pgz image is printed on the back side. For transfer paper S2, the Pgs image is on the front side and the Pgs image is on the back side.
gv images will be transferred respectively. Originally, it is desired to transfer a Pgz image to the front side of the transfer paper S1 and a Pgz image to the back side of the transfer paper S1.

Further, regarding the transfer paper S2, it is desired to transfer an image of Pg3 to the front side and an image of Pg4 to the back side.

If you use multiple double-sided originals and perform double-sided copying while in ADF mode, such mistakes will occur, but in order to prevent such mistakes from occurring, It is also possible to set only the first original of one sheet in the original feeding unit, eject the same original through the automatic document feeder, turn the ejected original over, and feed it again. In the ADF mode, as mentioned earlier, the print button must be pressed for each document, and this type of operation is really troublesome.

(Purpose) The present invention provides two-sided copying using a double-sided original.
It is an object of the present invention to provide a copying machine with an automatic document feeder that eliminates the above-mentioned copy mistakes and troublesome pressing operations of the print button.

(Structure) In order to achieve the above-mentioned object, the present invention, when the double-sided original copy key is pressed and the double-sided copy mode is selected,
The present invention is characterized in that the automatic document feeder is set to the latter of the ADF and SADF modes.

The present invention will be explained below based on one embodiment.

FIG. 1 shows a copying machine with an automatic document feeder according to an embodiment of the present invention, in which reference numeral 1 indicates a copying machine main body, and numeral 2 indicates an automatic document feeder attached to the upper part of the copying machine main body.

The automatic document feeder 2 includes a document feeder 3 and a document feeder 4.
It is made up of.

The document feeding section 3 includes a document setting table 5, a calling belt 6, a separating roller 7, a separating blade 8, a pair of document feeding rollers 9, and the like. Further, the document conveyance section 4 includes a document conveyance belt 11 and a paper discharge roller 12. As shown in the figure, the document conveyance section 4 is pivotally supported at its back to the copying machine main body 1 so that it can swing freely, and by lifting the front side, the document conveyance section 4 and the conveyance belt 11 can be rotated open, and the contacts of the copying machine can be opened. The top of the glass 14 is open.

When the automatic document feeder 2 is not in use, the document feeder 4
is opened and the document is manually placed on the contact glass 14. Hereinafter, such a mode in which the automatic document feeder is not used will be referred to as a pressure plate mode.

Here, when the automatic document feeder 2 is used, automatic document feeding and conveyance is performed as follows.

First, the document 0 with the image facing downward is inserted along the document setting table 5, and its tip is brought into contact with the mutual contact portion of the separation roller 7 and the separation blade 8. Hereinafter, such an operation will be referred to as "setting a document." Note that the document switch S between the calling belt 6 and the separating roller 7
to detects the presence of a document when a document is set, and detects the absence of a document when it is not set.

After setting the original, press print button 15 (
(See Figure 2), a paper feed signal is sent from the copying machine main body to the automatic document feeder 2, and this signal causes the calling belt 6, separation roller 7, document feed roller pair 9, document feed belt 11, etc. starts rotating.

Then, the document is automatically fed and conveyed within the document feeding section 3 by the calling belt 6, separation roller 7, document feeding roller pair 9, etc., and is sent between the document conveying belt 11 and the contact glass 14. Next, the rotating document transport belt 1
1, the original is fed over the contact glass, and when it reaches a predetermined position in this portion, the original transport belt 11 stops, and the original is stopped and held at the predetermined position.

While the original is stopped, the original illumination optical system 16 of the copying machine moves to the left in the figure together with the mirror system 17, and the original is manipulated. At this time, the scanning light image of the original is transferred to the mirror system 17. An image is formed on the photoreceptor 20 via the lens 18, mirror 19, etc., and exposure is performed.

The electrostatic latent image formed by this exposure is visualized by a developing device 22, and this developed image is transferred by a transfer charger 24.degree. to a transfer sheet fed from a paper feed section 23 in the direction of arrow A.

After the transfer, the transfer paper passes through a pair of fixing rollers 25 and is fixed, and then moves in the direction of the dashed arrow and is discharged as a copy to a tray 27 via a pair of discharge rollers 26. On the other hand, when the document scanning is completed, the document conveyance belt 11 rotates again.
The document is discharged to a document discharge tray 13 via a discharge roller 12 .

When double-sided copying is to be performed, the path switching member 29 shown in FIG. 1 is switched from the imaginary line position to the solid line position.

Then, the transfer paper that is sent in the direction of arrow A and has the developed image transferred to the - side is sent to the transfer paper reversing section 31, then reversed and sent in the direction of arrow B, and is stored in the intermediate tray 32. Ru. Note that after the transfer paper is sent to the reversing section 31, the switching member 29 is switched from the solid line position to the imaginary line position. The transfer paper stored in the intermediate tray 32 is fed again in the six directions of the arrows, and the developed image of the next sent document is transferred to the other side, and then fixed again by the pair of fixing rollers 25, as indicated by the broken line arrow. The paper is moved in the direction shown in FIG. The above is a double-sided copying mode when an original with an image on only one side is used.

Here, A Kano mode means that there are multiple documents, and the document feed section 3
When the originals are set simultaneously in the automatic document feeder 2, the first press of the print button 15 (see FIG. This is a mode in which paper is ejected to the paper tray 13.

Now, a double-sided document 0□ as shown in FIG.

0□, 0. , 04 (respectively Pg2 +Pg* on the back side
+Pgs and +Pgs) are stacked one on top of the other in order from the bottom and set between the separation roller 7 and separation blade 8 shown in FIG. 1, and if the mode is ADF mode, As mentioned earlier, in this mode, multiple sheets of originals are fed and conveyed in succession with only the first press of the print button, so for transfer paper S0, this front side niPg
The □ image will be transferred to the back side, the Pg3 image will be transferred to the back side, the Pgs image will be transferred to the front side of the transfer paper S2, and the □ image will be transferred to the back side. Originally, for example,
Regarding the transfer paper S1, it is desired to transfer a Pg image on the front side and a Pgz image on the back side.

If you use multiple double-sided originals and perform double-sided copying while in ADF mode, such mistakes will occur, but in order to prevent such mistakes from occurring, Only the first original of one sheet is set in the original feeding unit, the same original is ejected through the automatic document feeder 2 to the original ejection tray 13, the ejected original is manually turned over, and then fed again. However, in this case, in the ADF mode, the print button must be pressed for each document, and this type of pressing operation is really troublesome.

Therefore, in the present invention, as shown in FIG. 2, a double-sided original double-sided copy key 28 is provided on the main body of the copying machine, and when this key is pressed to select the double-sided copy mode, the automatic document transport bag W
2 to the latter SADF of ADF and SADF modes.
The mode is set automatically.

When this mode is set to SADF mode, when originals are set one by one in the original feeder, the first press of the print button on the copier will print one original. Although the mode is such that the document is automatically fed and conveyed if you insert each document, if you press the print button first and manually insert the first document, the document will be automatically fed and conveyed, ejected to the tray 13, and then If you turn the original over and insert it again, the original will be automatically fed and transported again, and you won't have to press the print button each time. When repeating the process, there is no need to press the print button each time.

Furthermore, when copying, it is possible to obtain copies that are aligned in the form of pages on both the front and back sides, and there is no possibility of copy errors as shown on the right side of FIG. 8.

Here, FIG. 2 shows an example of the control circuit system according to this embodiment, and the part on the right side of the dashed-dotted line shows the control circuit system on the automatic document feeder side.

In the figure, copying machine main body 1, ROM 34 with -10, C
The PU 35 and the like are connected by interface cables, and in the figure, StA and Sts are switches for manual ADF mode and SADF mode selection, respectively. Further, Sto is a switch provided at the position shown in FIG. 1, which detects the presence or absence of a document, as described above. Note that you can tell what mode the automatic document feeder is in by checking the ADFLED36. SADFLED37
Judgment can be made when one of them lights up.

3 and 4 show the flow of the main body of the copying machine. In contrast to the main routine for checking the key switch in FIG. 3, in the key switch check routine in FIG. It is determined whether or not it is turned on. If it is turned on, it is determined in the next step whether or not a double-sided document is set. If a double-sided original is set, the next step is to reset the double-sided original flag and turn the double-sided original mode release information off (
automatic document feeder). That is, double-sided original F=1
In this case, the double-sided original mode is selected at that point, so turning on the double-sided original double-sided copy key turns the mode off; on the other hand, if the single-sided original flag is not set, the reverse is true. Double-sided original mode information is sent to the DF.

5 to 7 show the flow of the automatic document feeder,
Of these, flow 1 in FIG. 5 shows the main routine,
The information on the copying machine itself is checked and the document set is checked.

First, in the main body information check routine of Flow 2 in FIG. 6, it is determined whether or not double-sided original mode information has been sent, and if so, a double-sided original flag is set. On the other hand, if double-sided original mode information is not sent, in the next step, it is further determined whether double-sided original mode cancellation information has been sent, and if the cancellation information has been sent, the double-sided original flag is reset. . □Next, in the document set check routine of Flow 3 in FIG. 7, it is determined whether the document switch (5to in FIG. 1) is turned on or not. If it is turned on, the next step is to switch to the pressure plate mode. It is determined whether or not there is. Here, the pressure plate mode means, as mentioned earlier, in FIG.
This is the mode when loading on 4.

Returning to the original explanation, when it is determined whether or not the pressure plate mode is set, if it is not the pressure plate mode, that is, ADF, SADF
If the mode uses an automatic document feeder that performs both modes, in the next step it is determined whether or not a double-sided document flag is set, and if so, the SADF mode is set.

That is, even if the automatic document feeder is selectively set to the ADF mode, the SADF mode is automatically set when a double-sided document is set. If the SADF mode is set, the above-mentioned copy mistakes are eliminated, and there is no need to press the print button each time.

Returning to the original explanation, when determining whether or not the pressure plate mode is set, if the pressure plate mode is selected, the first step is to determine whether or not the double-sided document flag is set, and if it is not set. For example, if a document is set in the document feeding section of the automatic document feeder, the SADF mode is automatically set at the time of setting the document. On the other hand, if the double-sided document flag is not set, the ^DF mode is set.

In addition, in FIG. 1, when the document transport section 4 is opened,
When a suitable switch is used to shift to the pressure plate mode and close the document transport section 4, the ADF is switched from the pressure plate mode to
, the automatic document feeder mode is switched to the SADF mode.

Therefore, after performing normal copying in platen mode.

As long as the document conveyance unit 4 is closed, the double-sided document double-sided copy key 28 is pressed, and a double-sided document is set, the automatic document feeder automatically enters the SADF mode.

In addition, in flow 3 of FIG. 7, when the SADF mode is set, the SADF LED 37 of FIG. 2 lights up, and it is determined whether the document information sending flag is set. If not, the document information is Set the send flag,
Sends document presence information to the copying machine.

As described above, in one aspect of the present invention, even if the pressure plate mode or ADF mode is set, pressing the double-sided original copy key 28 (see FIG. 2) and setting the original;
As long as the original switch Sto (see FIG. 1) is turned on, the mode is always switched to the SADF mode. Conventionally, the operator pressed an operation key to select the SADF mode, but there is no need to perform any such key operations.

In addition, in the copying machine of this embodiment, when two or more originals are set in the original feeding section 3, if the originals are not continuously fed and conveyed when the SADF mode is set, the above-mentioned mistakes can be avoided. Copying can be avoided.

In this case, whether one original or two or more originals have been set can also be detected by the original switch Sto shown in FIG. 1, which detects the presence or absence of an original. This is because if there are two or more originals, the switch remains on, and if there is only one original, the switch is turned off after one original passes. This switch detects two or more originals, and the automatic document feeder is set to SADF.
This prevents documents from being continuously fed and conveyed when the mode is set.

Furthermore, in the above embodiment, when copying both sides of a double-sided original,
In this case, if the manual ADF mode selection switch 5tA (see Figure 2) is accidentally turned on, the ADF LED 36 (see Figure 2) will be disabled. (See Figure 2) can be made to blink to give a warning to the operator, making it possible to avoid the above-mentioned copy mistakes in advance.

(Effects) As described above, according to the present invention, when double-sided copying is performed using a double-sided original, it is possible to obtain copies that are aligned with the pages on both the front and back sides, and the troublesome operation of pressing the print button is not required. This greatly simplifies this type of copying work. Note that this type of technology can be applied not only to copying machines but also to facsimile machines equipped with automatic document feeders.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a copying machine with an automatic document feeder according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of a control circuit system according to the above embodiment, and FIG. 3 is a main routine of the copying machine main body. 4 is a control flow diagram of the key switch check routine in the same routine, Figure 5 is a control flow diagram of the main routine of the automatic document feeder, and Figure 6 is a main body information check in the same routine. FIG. 7 is a control flow diagram of the routine. FIG. 7 is a control flow diagram of the original set check routine. FIG. 8 is a diagram for explaining problems that occur in the conventional example. 1... Copying machine main body, 2... Automatic document feeder, 3.
... Original feeding section, 4... Original transporting section, 15... Print button, 20... Photoconductor, 23... Paper feeding section, 28.
・Double-sided original double-sided copy key. Figure 2 Figure 7384 Side view Figure 5 Figure Q

Claims (1)

[Scope of Claims] A developed image on a photoreceptor is transferred onto one side of a transfer paper fed from a paper feeding section, and after fixing, the transfer paper is re-fed to the photoreceptor and transferred onto the other side of the transfer paper. A document feeding section that feeds an inserted document to a copying machine body equipped with a double-sided copying means that transfers another developed image on a photoreceptor and fixes it again to obtain a double-sided copy; It is equipped with an automatic document feeder that is equipped with a document feeder that conveys the document sent from the feeder onto the document scanner, scans the document, and then discharges it to the document ejection section. To do this, a double-sided original duplex copy key for selecting the double-sided copy mode is provided on the copier, and when the original is loaded one by one into the original feeder, the print button on the copier can be pressed one by one. When the automatic document feeder automatically feeds and transports multiple documents at the same time by pressing the print button each time, the first press of the print button allows the multiple documents to be fed and transported one after the other. The automatic feeding mode is set to ADF mode, and when originals are set one by one in the original feeding unit, the originals are automatically fed one by one by pressing the print button only once. When the double-sided original double-sided copy key is pressed and the double-sided copy mode is selected, the automatic document feeder is set to the SADF mode.
A copying machine with an automatic document feeder, characterized in that it is set to the SADF mode, which is the latter of the ADF modes.