JPH03114072A - Copying device - Google Patents

Abstract

PURPOSE:To prevent the damage of a computer form original by providing a means discriminating whether an original is the computer form original or a sheet original and adopting a constitution that the original is not reversed in spite of a copying mode when the computer form original is copied. CONSTITUTION:The copying device is provided with an input means 100 which selects a double-sided original copying mode where the images of both sides of the original are copied, or a single-sided original copying mode where only the image of one side is copied, an instruction generating means 101 which reverses the original at the time of the double-sided original copying mode and carries the original without reversing it at the time of the single-sided copying mode, and a means 102 discriminating whether the original is the computer form original or the sheet original. Further, the copying device is provided with an instruction generating means 103 carrying the original without reversing it in spite of the copy mode in the case of the computer form original and carrying the original corresponding to the copying mode in the case of the sheet original. Thus, when a computer form original is copied, the damage and jam of the computer form original are prevented even if a double-sided original copying mode is erroneously selected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a copying apparatus that controls the conveyance and stopping of a document and performs a copying operation by illuminating the document stopped on a platen.

[Conventional technology]

The above-mentioned type of copying machine, which has an automatic document feeder attached to the main body of the copying machine, is well known. It is also known that this type of copying apparatus can be configured so that, in addition to a single normal sheet document, each member can also copy a continuous computer paper document while automatically conveying the same. be.

Such a copying device is configured to be able to select a single-sided original copy mode in which an image formed on one side of an original is copied, and a double-sided original copy mode in which each image of an original with images formed on both sides is sequentially copied. It is normal that this is done. For example, when copying a sheet original with images formed on both sides in double-sided original copy mode, the sheet original is fed onto the platen, the image on the first side is copied, and then the original is ejected from the platen. , turn it over and send it to the platen again, copy the image on the second side,
Thereafter, the original is ejected from the platen onto the sheet 1, either as it is, or turned upside down again and ejected out of the machine. The sheet original may be reversed before it is sent to the platen.

In any case, when the double-sided original copy mode is selected, the original is reversely conveyed1]7.

As mentioned above, images on both sides of the sheet 1 document can be copied while being reversed and conveyed.
Since computer paper documents are continuous and long, if they are reversed and conveyed, an excessive external force is applied to the documents themselves, resulting in damage or jamming. Therefore, if you inscribe a computer paper original, you should not copy it in the double-sided original copy mode.

[Problems to be Solved by the Invention] However, when copying a computer paper document, it is conceivable that the operator may erroneously select the double-sided document copy mode and directly start the copying operation. If such a situation occurs, it is inevitable that the computer paper document will be damaged or jammed.

The object of the invention is to provide a reproduction device of the type mentioned at the outset, which eliminates the drawbacks of the prior art mentioned above.

[Failure to solve the problem]

In order to achieve the above object, the present invention selects a double-sided original copy mode in which images on both sides of an original are successively copied, and a single-sided original copy mode in which only images on one side of the original are copied, as shown in FIG. The input means 100 includes a first command generating means 101-, which outputs a command to reverse the original in the double-sided original copy mode and to convey the original without reversing the original in the single-sided original copy mode, and a combination coater paper original or sheet/original. means 102 for determining whether the original is a computer paper original, the original is conveyed without inverting it regardless of the copy mode, and when it is a sheet 1 original, the original is conveyed without inverting the original, the first . A copying apparatus is proposed that has a second command generating means 103 that outputs a command to convey the document in accordance with the command of the command generating means, and a means 1-04 that conveys the document according to the command of the second command generating means. do.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a sectional view showing an example of a copying machine having a copying machine main body 4 and an automatic document feeder 5 mounted thereon.
As will be described later, this copying apparatus is configured to be able to copy not only normal sheet originals but also computer paper originals.

A platen 6 made of, for example, transparent glass is fixedly mounted on the upper part of the copying machine body 4, and a fed document is placed on the upper surface of the platen 6 as described later. A light source 7 is located below the platen 6.
A first scanner 9 consisting of a first mirror 8 and a second scanner 12 consisting of a second and third mirror 10.11 are arranged, and these scanners 9.12 are moved from the illustrated home position to the left in the figure. Moving. At this time, the document supported on the platen 6 is illuminated by light from the light source 7, and the reflected light is reflected from the first . Second and third mirrors 8, 10.
11, then passes through lens] 3, is reflected by a fixedly arranged fourth mirror 14, and reaches a photoreceptor (not shown), where an electrostatic latent image corresponding to the original image is formed. . As is well known, this latent image is made visible by toner, and the visible image is transferred to transfer paper to obtain copy paper.

The automatic document feeder 5 includes a conveyance bell l-15, which is an example of a conveyance member provided opposite to the platen 6, a paper feeder 6 for feeding a normal sheet document to the platen 6, and a paper feed device 6 for feeding a normal sheet document to the platen 6. Paper feed port 1 through which the combi coater paper original passes
7, and a document discharge device 18 for transporting the document sent out from the platen 6 after illumination.

The conveyor belt 15 is passed around a number of rollers, one of which is driven by a drive motor M2, which is shown schematically in FIG. It is rotated in one direction. As a result, the conveyor belt 5 is moved in the direction of the arrow, and the document on the platen 6 is conveyed as will be described later.

Conveyor belt 15 and its rollers, and document ejection device 1
8 is covered by a common cover 20, which is integrally rotatably supported on the upper part of the copying machine main body 4. By rotating this in the direction of lifting, the platen 6 is opened to the outside and can be operated manually. The platen 6 is configured so that a document can be placed on the platen 6.

Next, in order to understand the present invention, a normal sheet original is
16 to the platen 6 and the configuration related thereto.

First, a main switch (not shown) of the copying machine main body 4 is turned on, and sheet originals (not shown) are set in a bundle on the original setting table 21. As a result, the document set sensor 22 of the paper feeder 16 is turned on by the leading edge of the sheet document. If the print switch (not shown) of the copying machine main body 4 is pressed in this state, the CPU 112 of the copying machine main body 4
(FIG. 4) The automatic document feeder 5 starts operating based on a paper feed command issued from the side. That is, paper feed device 1
The calling rollers 23, 23 of No. 6 rotate counterclockwise, and the sheet original advances. At the same time, the separation roller 24 rotates counterclockwise, and by the action of the separation roller 24 and the separation blade 25 pressed against it, only the lowest one original sheet is sent between the pair of pull-out rollers 26.
It is transported toward the platen 6.

Each of the rollers 23, 24 and 26 of the paper feeding device 6 described above is
It is rotationally driven by a waste drive motor M1 schematically shown in FIG.

When the leading edge of the fed-out sheet document is placed on the platen 6, the document is moved onto the conveyor belt 1, which is moved in the direction of the arrow.
5 and conveyed over the platen 6. When the trailing edge of this original passes through the registration sensor 27 of the paper feeder 16, the sensor 27 detects this fact, and after the sheet original moves a predetermined distance, the conveyor belt 15 stops, and the sheet The document comes to rest on the platen 6. At this time,
The rear end of the sheet original matches the reference position X on the platen 6. Such control is performed using an encoder E2 (FIG. 4) attached to the drive motor M2.

Next, as described above, the scanners 9 and 12 are activated, and the original supported on the platen 6 is illuminated with light g7, and a copying operation is performed.

When a predetermined number of copies of the sheet original have been copied, the CPU 112 (FIG. 4) on the side of the copying machine main body 4 issues a feeding command for the next sheet original to the CPU 38 of the automatic document feeder 5. In order to eject the sheet original that has been copied, the CPU 112 on the copying machine main body
A paper discharge command is transmitted from the CPU 38 on the automatic document feeder side. With this, paper feed! ! 16 transports the next sheet original, and the transport belt 15 is again driven in the direction of the arrow, and the illuminated sheet original is transported from the platen 6 and sent out. be discharged.

Such operations are performed continuously, the sheet originals are automatically fed one by one, and each image is copied.

In order to increase the copying efficiency, before the copying of the original sheet on the platen 6 is completed, conveyance of the next original may be started, and then the previous original sheet on the platen 6 may be ejected and conveyed. In this way, when the next sheet original stops on the platen 6, a part of the previous sheet original is still on the platen 6, but this sheet original is transferred to the intermediate conveyance roller 28.
This ensures that the liquid is ejected without stopping.

Next, we will clarify the basic operations and related configurations when copying computer paper manuscripts.

Computer paper manuscripts, like sheet manuscripts, also have
After automatically feeding the first page onto the platen 6 and copying the image on the first page, the computer paper document is further conveyed by the length of the first page, and the second page is set on the platen 6. However, in this example, the first page of the computer paper manuscript is manually copied onto the platen G, and subsequent pages are copied. For the above, one sheet of the combi coater paper manuscript is sequentially
- It is constructed so that images of each member are copied by transporting them in 100 minute increments. , : This is due to the following reason: 7 Computer paper manuscripts are usually separated at the folds 2a, 2b, etc. of the convenience store paper manuscript, as shown in Figure 1-A (a). 1. a, ], I).

Printed parts (images) at predetermined positions η of 1c... Pl, P2
-P, . . . are formed. In such a case, there is no problem even if the first page is automatically fed to the platen 6 and copied, as shown in FIG. , JBee paper C on which the copied image ■ is formed
can be obtained.

However, in some cases, as shown in Figure 1A (e),
Each member 1a, ]-b, lc... of the computer paper manuscript 1
・Printing is not done in the designated position.

The printed portions P, P, P3, etc. may be formed over two pages. In such a case, the computer paper document 1 is automatically fed from page #1.

When the first page is stopped at a predetermined position on the platen and the comb is copied, a copy paper C with a missing copy image 1 is obtained as shown in FIG. 1, A (d).

Therefore, in this example, first, a combination coater paper document 1- as shown in FIG. The paper is inserted into a paper feed port j-7 provided separately from the paper device 16, and then set on the platen 6''. At this time, when the printed portions P, , p, , p, . Align the fold 2a of the paper with the reference position X on the platen 6
Set the first page 1a on the platen 6. Figure 1A (
If the printed area is misaligned as shown in c), the fold line 2a is shifted from the reference position and the paper is removed so that the first printed area P□ is copied correctly.

That is, the intermediate portion X, 1 (FIG. 1A (C)) of the printing portion P, P is set to the reference position X.

The remaining computer paper document portions that come out of the paper feed ports J and 7 can be placed, for example, folded, on the table 21 or other location, as shown in FIG.

Since the cover 20 can be lifted to expose the platen 6 during the above-described operation, the operation can be easily performed.

When the cover 20 is closed in the J double state and the main switch and print switch of the copying machine main body 4 are pressed, a paper feed command is issued from the CPU 112 on the copying machine main body side to the automatic document feed CPU 38 on the drawing side. As will be explained in detail later, neither the conveyor belt 15 nor the discharge device 18 is activated by this paper feed command, and the computer paper document 8 remains stopped on the platen 6.

As described above, with the computer paper original 1 - stopped, the computer paper original 1 is
A predetermined number of copies of the 14th printed portion P of
A predetermined number of copy sheets as shown in Figure A (b) are obtained.

1st. When the illumination operation for the printing section P1 is completed, a paper discharge command is issued from the CPU 112 on the copying machine main body side, and based on this, the drive motor M2. M3 starts to operate, the 11 feed belt 15 operates in the direction of the arrow, and the rollers of the document discharge device J8 operate. As a result, the computer paper document 1 is conveyed in the horizontal direction by the intermediate conveyance roller 28 and the discharge roller 35, and the printed portion P2 of the second page of the computer paper document 1 is conveyed toward the platen 6, and the printer 1 is placed on the platen. - to be done.

The above-mentioned operations are sequentially executed for the third and subsequent pages, and as a result, correct copy paper as shown in FIG. 1A (b) is obtained for all pages.

In order to control the conveyance of the computer paper document as described above, the computer paper document is placed on the upstream side of the platen 6 in the direction of conveyance of the computer paper document 1, in the example shown, in the area between the paper feed port 17 and the platen 6. The first sensor 36 detects the sprocket hole 3 (see Fig. 1, A, ) (e)) and controls the conveyance and stopping of the computer paper document based on the detection pulse. A second sensor 37 is provided to detect whether or not the second sensor 37 exists at a position where it can be detected by the first sensor 36 . In the illustrated example, both sensors 36 and 37 are arranged side by side in a direction perpendicular to the paper surface of FIG. The distance Ω from the position where both sensors 36 and 37 detect the computer paper original to the reference position X is
(Q≦Ll) is set to be less than or equal to the length LL of one page (FIG. 1(a)).

Further, guide members (not shown) are provided in the transport path from the paper feed port 17 to the platen 6 to guide both side edges of the computer paper document 1 and prevent the computer paper document 1 from skewing. No conveyance member is provided for conveying.

As mentioned above, copying to the first printing section P is completed,
When the computer paper document 1 starts to be conveyed, the first sensor 36 detects the sprocket hole 3 (FIG. 1A (a) or (C)) formed in the computer paper document 1. Then, the number of detected pulses is
When the number of pages (usually 22) is reached, the drive motor M
2゜M3 stops and therefore the computer paper document 1
stops. At this time, the second printing portion P2 is positioned at a predetermined position on the platen 6.

Next, the second printing section P2 is illuminated and copied, and after the illumination operation is completed, the computer paper document 1 is conveyed again in the same manner as described above, and the third printing section P is placed at a predetermined position on the platen 6. It will stop at the position and this will be copied. In this manner, the first sensor 36 detects the sprocket hole 3, controls the conveyance and stopping of the computer paper document, and copies each member's printed portion one after another. During this operation, the second sensor 37 constantly detects the presence of a computer paper document.

In the illustrated example, the sensor 36 is located on the upstream side of the platen 6, so when the trailing edge of the last page of the computer paper document 1 approaches the rain sensors 36 and 37 and passes through these sensors 3e and 37, the second The sensor 36 of No. 1 cannot detect the sprocket hole 3. Therefore, in this state, it is not possible to control the conveyance and stop of the computer paper document.

Therefore, from the time when the second sensor 37 no longer detects the computer paper document 1, instead of the control based on the detection by the first sensor 36, the computer paper document 1 is conveyed by a control device including, for example, a timer or a pulse generator.
Configured to control outage. That is, when the second sensor 37 no longer detects the computer paper document 1, the computer paper document conveyance and stop control by the first sensor 36 is automatically switched to the conveyance and stop control by the control device. be. If you do this,
Even if the first sensor 36 no longer detects the sprocket hole 3, the computer paper document 1 will be processed after a predetermined period of time has elapsed or after a predetermined number of pulses have been generated since the trailing edge of the last page passes the second sensor 37. By stopping the computer paper original 1, the printing portion of the final page can be correctly positioned and stopped at a predetermined position on the platen 6, and the copy can be made without any trouble. After completing the copying of the printed portion of the final page, the entire computer paper document 1 is carried out from the automatic document feeder, and the series of operations is completed.

FIG. 4 is an overall circuit block diagram for obtaining the above-described operation.

In FIG. 4, a CPU 112 constituting a microcomputer on the copying machine main body 4 side and a CPU 38 constituting a microcomputer on the automatic document feeder 5 side are both ROM
and a built-in RAM, both CPUs transmit information through serial communication, and each of the aforementioned sensors 2
2, 27, 36, 37 and other various sensors (not shown in FIG. 2) 139, 2 provided in the document ejection device 18.
The output of 39.339 is sent to CP via input buffer 39.
Input to U38. In addition, each of the above-mentioned immediate-acting motors Ml, M
The drive motor M3 that drives each roller of the document discharging device 18 shown in FIG. 2 and FIG. a servo motor circuit SL to which a forward/reverse command is input which determines the direction of rotation of the motor; 82. Wanted via S3
I+, and is configured to operate according to instructions from the CPU 38. Servo motor circuit SL, 82. S3 is a drive motor Ml, M2 . Encoders Ex, , E2 attached to M3. Pulses from E3 are used for speed control and pulse information is also provided to CPU 38. , C
PIJ3B controls the position of the document based on this pulse information, and part of it is controlled by drive motors Ml, M2 . M3
It is also used for abnormality detection.

The CPU 38 also has an analog port 1- (for example, μPD7810 manufactured by NEC), and variable resistors are connected to the analog ports 1-ANI and AN2, and the resistance value is input to the CPU 38 with a resolution of 256. is supplied to. This information is used to control the stopping position of the document. There are some variations depending on the individual automatic document feeder, so
For example, if the number of stop pulses from the sheet document passing through the register I/sensor 27 to the document reference position It can be changed. Soft-
42 is, for example, 600 + (V
The analog value of R] can be adjusted.

By the way, in the copying apparatus shown in FIG. 2, a single-sided original copy mode that copies the WI image number on one side of the original, and a double-sided original copy mode that sequentially copies images on both sides of the original are selected. FIG. 2A shows the key-powered device 100 as an input means for selecting both of these copy modes. This key human powered device JOO
is provided on the operation panel of the copying machine main body 4, and when the operator presses the double-sided original key 110, the double-sided original copy mode is selected.7If this key is not pressed, the single-sided original copy mode is automatically selected. selected.

These input information are input to the CPU 112 on the side of the copying machine main body 4 shown in FIG. The original is conveyed with the original turned upside down, and when the single-sided original copy mode is selected, a command to convey the original without reversing it is output, and based on this, the control described below is executed by the CP TJ 38. be done.

Assume that a sheet original is to be copied, and that the single-sided original copy mode has been selected. As explained earlier, the sheet original is sent to the platen 6 by the paper feeder 16 shown in FIG. be done. The document ejecting device 18 includes the intermediate double-feeding roller 28 briefly shown above, a switching claw 29 disposed on the downstream side thereof, and a paper ejecting roller 35 further downstream thereof. When the mode is selected, the switching pawl 29 is held at the position shown by the solid line in FIG. Therefore, after completing the illumination of the sheet/original on the platen 6, the drive motor M
2. When M3 is activated, the sheet document is transferred to the conveyor belt】5.
The sheet is conveyed as it is to the left side in the horizontal direction in FIG. 2 by the intermediate conveyance roller 28 and the discharge roller 35, and is discharged from the apparatus. In this way, in the single-sided original copy mode, the sheet original is conveyed without being turned over and is ejected from the apparatus.

When the double-sided original key 110 shown in FIG. 2A is pressed to select the double-sided original copy mode for copying images on both sides of a sheet original, a command from the CP 038 causes the driver to copy the images on both sides of the sheet original as shown in FIG. A solenoid for the switching pawl 29 and an indicator (not shown) are immediately actuated via the circuit 40, and the switching pawl 29 is thereby moved to the position shown by the chain line in FIG. 2 and shown in FIG. 3(b). Switch. At the same time, the display illuminates to indicate that the double-sided original copy mode has been selected. At this time, the feeding of the next sheet/document is prohibited, and the drive motors M2 and M3 are driven by a command from the P TJ 38, so that the document ejecting device 1
The first to third reversing rollers 30, 31, 33 and turn roller 32 of 8 are rotated in the directions shown in FIG. 3(b), respectively. Therefore, the sheet original that leaves the platen 6 is
As shown by the arrow in FIG. 3(b), it is conveyed between the first and second reversing rollers 30 and 31, then reversed by the turn roller 32, and then passed between the second and third reversing rollers 31 and 33. , and is sent onto the platen 6 again. At this time, the second side of the sheet document, which is opposite to the previously copied first side, is facing the platen 6, and the image on this second side is copied according to the procedure described above.

The sheet original whose second side has been copied as described above is
As shown by arrow B1 in FIG. 3(a), the sheet is guided by the switching claw 29 and conveyed while being held between the first and second reversing rollers 30 and 31. These rollers 30, 31 are then reversely rotated, and the sheet original is discharged out of the apparatus as shown by arrow B2 in FIG. Alternatively, the switching claw 29 can be switched again to the position shown by the solid line in FIG. 2, and the sheet original whose second side has been copied can be ejected out of the machine as it is, that is, without being turned over.

As described above, when the single-sided original copy mode is selected, the command to transport the original without reversing it is issued, and when the double-sided original copy mode is selected, the command to transport the original with the original reversed is issued. It is output from the CPU 12 on the copying machine main body 4 side, and based on this, the CPU on the automatic document feeder S side
The PU 38 outputs commands in accordance with the commands from the CPU 112 according to each copy mode, and based on the commands, the transport belt 15, the document ejection device 18, and the drive motor M2 . The document conveying means consisting of M3 and a solenoid operates to convey the document.

In the illustrated copying apparatus, as shown in FIG. 2A, the key manual device 100 has a single-sided copy mode in which a copied image is formed only on one side of the copy paper, and a mode in which a copied image is formed on both sides of the copy paper. A key 113 for selecting a double-sided copy mode is provided, and when this key 113 is pressed, the double-sided copy mode is selected, and when it is not pressed, the single-sided copy mode is selected. The copying machine main body 4 is configured to be controlled.

When copying a sheet original, you can freely select the open-sided original copy mode and single-sided original copy mode to perform the copying operation, as described above.
If the double-sided original copy mode is selected when copying a computer paper original 1, the computer paper original 1 will be conveyed in reverse, which may cause the computer paper original 1 to be damaged or
cause a jam. Therefore, when copying a computer paper original, the computer paper original must be transported and copied in the single-sided original copy mode.

That is, the switching claw 29 is held at the position shown by the solid line in FIG. 2, and the computer paper original is conveyed as it is to the left in FIG. However, when copying a computer paper document, the operator may mistakenly select the double-sided document copy mode.

Therefore, in the present invention, it is determined whether the original to be copied is a computer paper original or a sheet original before copying, and when the original is a computer paper original, the double-sided original copy mode is selected. or without flipping the original even if the single-sided original copy mode is selected.

In other words, the CPU 3
8 outputs a command, and according to this command, the document conveying means 15,
18. M2. Activate M3. Also, if the document type is determined to be a sheet document, as explained above.

The CPU 3 sends a command to convey the document by reversing or not reversing it according to the command from the CPU 112 according to the copy mode.
8, and the document conveying means is operated according to this command. In this way, even if the operator accidentally selects double-sided original copy mode when copying a computer paper original, the original can be transported in single-sided original copy mode, and the above-mentioned problem can be prevented. Moreover, for sheet originals, the original can be transported according to the selected copy mode.

Next, the control operation for determining the type of document described above will be explained together with more detailed control operations for transporting and stopping computer paper documents.

FIG. 4A is a flow diagram showing the overall operation control operation of the CPU 38. First, in FIG. 4A, it is checked whether the second sensor 37, which detects the presence of the computer paper document described above, is the main sensor. If this is off, there is no computer paper document 1- in the paper feed port 1.7 shown in FIG. 2, and therefore the document to be copied is a sheet document. Therefore, in this case, as described above, depending on the double-sided original copy mode or single-sided original copy mode, the original is inverted or not inverted and transported in the L direction to perform the copying operation. That is, the sheet document processing shown in FIG. 4A (1) is executed.

If the second sensor 37 is on, it means that a computer paper document is present in the paper feed port 17 (hereinafter, the mode for conveying a computer paper document will be referred to as CFF mode). In this case, the "rCFF mode check" routine is entered (Fig. 4A, ■), followed by the "rCFF pulse check" and rCF,10, which will be explained in detail later.
BJ is executed (■ in FIG. 4A).

As shown in FIG. 5, the "rCFF mode x'y" routine checks whether to enter the CFF mode.

Here, sheet 1 - the paper feeding device for feeding originals]-6 is operating (Fig. 5 ■), and sheet 1 is placed on table 21.
- When no original is set, that is, when the original setting sensor 22 is not turned on (FIG. 5), the CFF mode is activated. This indicates that priority is given to the operation of feeding and copying a normal sheet original.

As described above, whether or not the second sensor 37 is on and whether or not the paper feeding device 16 is operating.

It is detected whether or not the original sensor 1-sensor 22 is on, and its output is input to the CP tJ 38, and it is determined whether the original to be copied is a computer paper original or a sticker is on.
- It is determined whether it is a manuscript.

When it is determined that the document to be copied is a computer paper document, the CPU 38 of the automatic document feeder w5 sends a command "Document available" to the CPU 112 of the copying machine main body 4 (Fig. 5). ). Based on this information, the copying machine main body 4 side knows that a document has been set in the automatic document feeder B5, so when the print switch of the copying machine main body 4 is pressed, the CPU 112 sends the CP t of the automatic document feeder 5.
At J38, a paper feed instruction that should not be used to feed the original is sent (
Figure 5 ■).

When a normal sheet document is to be fed, the automatic document feeder 5 starts feeding operation based on this signal, but the CFF
In the mode, as described above, the paper feeding operation is not started, but the size of the computer paper document is transmitted to the CPU 2 of the copying machine main body 4 (FIG. 5). This information is
It is used as information for automatic paper selection of transfer paper and automatic selection of copy magnification on the copying machine main body side.

In addition, in response to the above-mentioned paper feed command, the CP of the automatic document feeder 5 is
1. The CFF mode flag is set on the J38 side (Fig. 5, ■). This flag is used to check that the CFF mode has been entered.

''-As described above, the automatic document feeder 5 apparently does not operate in the CFF mode even though it receives a paper feed command from the copying machine main body 4.

Therefore, there is no need to distinguish between a normal sheet document and a computer paper document 1 in the cptJll 2 on the copying machine main body side, and the control mode thereof can be simplified.

Of course, it is also possible to transmit the information that the combination coater paper original has been set to the CPU 112 of the copying machine main body 4, and perform other controls corresponding to the convenience store Yugeki paper original.

After it is checked in CP 038 that the CFF mode flag has been set to 1- (Fig. 5), the J-th printed portion P1 of the computer paper original 1- is illuminated and the copying operation is performed. However, after the illumination is finished, the CPU 38 of the automatic document feeder 5 receives a 117 paper command to convey and eject the copied original from the CPU 12 of the copying machine main body 4. (Figure 5■
). In response to this command, the CPU 38 of the automatic document feeder 5 performs operations (C
In order to perform the FF operation, "1" is set in CFFJBC (CFF operation counter) (FIG. 5). The subsequent series of operations will be explained later with reference to FIGS. 7 to 5.

On the other hand, in the rCFF pulse checker routine shown in Fig. 6, it is checked whether the OFF mode flag is set (Fig. 6 ■), and if it is set, the first A check is made to see if the sensor 36 is on (FIG. 6). That is, the detection pulse when the sprocket hole 3 is detected by the first sensor 36 is as shown in FIG.
At this time, it is checked whether the first sensor 36 is in the on state (H state), which is detecting the sprocket hole 3, or in the off state (L state).

Here, when the first sensor 36 is off, the CFFE
GF (CFF edge flag) is reset (6th
Figure ■). Further, if the first sensor 36 is in the on state, C
It is checked whether FFEGF is set (
If it is not set, CFFEGF is set (Fig. 6 ■). At the same time, a counter CFFCNT that counts the number of sprocket holes detected by the first sensor 36 counts the number of sprocket holes (Fig.
). Further, a counter (or timer) CFFJMT for checking whether or not the computer paper document 1 has jammed during its transportation is cleared, but this will be explained later.

As can be seen from the above, the counter CFFCNT
The counting of sprocket holes and the clearing of CFFJMT are performed at the tip edge of sprocket hole 3. That is, from the time when the part of the computer paper document 1 that is being conveyed, where the sprocket hole 3 is not located, passes the first sensor 36, the first sensor 36
detects the sprocket hole 3, in other words, the 16th
This is executed at the rising edge T of the pulse shown in the figure. Therefore, even if the first sensor 36 is in the on state, the CF
When FEGF has already been set, the operations shown in FIG. While detecting the sprocket hole 3 with the sensor 36 in this way,
You can count the number.

Next, FIGS. 7 to 15 are flowcharts showing what operations are performed depending on the count of the CFF operation counter CFFJBC mentioned above.

As explained earlier with reference to FIG. 5, when the CPU 38 of the automatic document feeder 5 receives a paper discharge command (FIG. 5 ■)
, CFFJBC are set to "1", so a multi-jump is performed according to the number of CFFJBC in the rcFJOBJ routine shown in FIG. If CFFJBC is "1", a jump is made to the rcFJBIJ routine shown in FIG.

In this routine, first, the speed commands of the drive motor M2 for the conveyor belt 15 and the motor M3 that drives the document ejection device 18 are set to a high speed state H, and both motors M2
．． Turn on M3. At the same time, the counter CFFCNT that counts the number of sprocket holes 3 detected by the first sensor 36 is cleared, and CFFJBC is set to "2".
” (see Figure 9). Through these operations, the computer paper document 1 is conveyed, and the first page thereof is ejected from the platen 6.

As mentioned above, in response to a command from the CPO 38, the conveyor belt 15. The document conveyance means consisting of the motor M2, the document discharge device 18, and the motor M3 operate to convey the computer paper document. At that time, in the CFF mode, the single-sided original copy mode should be selected, and if this copy mode is selected, the CP on the copier main body side should be selected.
A discharge command to convey the document in 5-sided copy mode is sent from UlI2 to the CPU 38 on the automatic document feeder side.
A command with the same content is output from the CPU 38. Therefore, the computer paper document 1 discharged from the platen 6 is conveyed without being reversed.

However, if the operator accidentally selects the double-sided original copy mode using the key manual device 100, the CPU
12 to the CPU 38.
As shown in FIGS. (a) and (b), a discharge command to reverse and transport the paper is transmitted.

At this time, since it has already been determined that the original to be copied is a computer paper original as described above, the CPU
38 outputs a transfer command to convey the computer paper document without reversing it. In other words, when it is determined that the original to be copied is a computer/double paper original, regardless of the single-sided or double-sided original copy mode, the computer
The command to convey the evening paper original without reversing it is issued by the CPU.
38, and in accordance with this, the document transport means 15.1
8. M2 and M3 transport the original to the left in FIG. 2 without turning it over. In this way, in step 17, troubles in conveying the combi-coater paper document are prevented from occurring.

Next, when the multi-connection < CF F J B C becomes "2" (see also Figure 7), rCFJB2J shown in Figure 10 is executed by the multi-jump of 'rcFJOB'.
], Runiko increments a counter CFFJMT for detecting a jam every time it enters a routine (FIG. 10 (■)), and 7 will also be explained later.

When the count number of the counter CFFCNT reaches a predetermined number less than the number 22 of sprocket holes for one page of the computer paper manuscript, the instant-acting motor λ42. Set the M3 speed to low and press C.
Set F F J B C to “3” (Fig. 10 ■, ■)
. In this example, the length of one page of the combination coater paper manuscript J is 22.
゜1 ]-inch, one page of computer paper manuscript has 2
Assume that two subblocks 1-holes 3 are formed,
When the callan 1-number becomes 1.8, the above-mentioned operation is performed.

In this way, before the combination coater finishes conveying J hundred of paper documents 1, the instant motor M2. The reason why M3 is set at a low speed is to accurately stop the computer paper document 1 at a predetermined position when it is stopped.

In Figure 10 ■, the count I-number of CFFCNT is 18
The operation when the number is smaller will be described later.

When CF and JB become "3" (see also FIG. 7), CFFJMT is incremented as shown in FIG. 1J (this will also be described later) (FIG. 11 (■)). counter CFFC
When NT calculates the number 22 of sprocket holes 3 for one page of Computer Yuzuki paper manuscript (Fig. 11 ■), single-motion motor M2. , , Apply the brake to M3 and rapidly stall the motor, and after this process CF FJ B
Set "4" to C (Figure 1 ■).

In the rCFJB4J routine, as shown in FIG. 12, the combination coater paper document 1 is stopped, and the drive motors M2. M3
Set the on/off command to OFF, and set CFFJBC to "0".
” and set it to the initial state (Fig. 12 ■).

As described above, the printing portion P2 of the second page of the computer paper original is set at a predetermined position on the platen 6), the copying operation is performed, and the above-mentioned operation is then repeated.

In FIG. 10 (■), if the count number of the counter CFFCNT does not reach ]8 and the second sensor 37 for detecting the presence of a computer paper document turns off (in FIG. 10 (■)
), computer paper manuscript] - means that the trailing edge of the last page has passed the second sensor 37. If this happens, it becomes impossible to control the conveyance and stop of the computer paper document 1 by the eleventh sensor 36 and the counter CFFCNT, so that the drive motor M3, which is an example of a pulse generating means,
The transport and stopping of the computer paper document 1 is controlled by an l-encoder E3 (FIG. 4) attached to the computer paper document 1. Control by the first sensor 36 and its counter CFFCNT is automatically switched to control by the encoder E3, which is an example of a control means. This switching is CP
This is carried out according to instructions from 038. That is, in FIG. 1-0, when it is checked that the second sensor 37 is off, the pulse of the encoder E3 is changed to
The counter M3TPC is cleared and the drive motor M3TPC is cleared.
2. When the speed of M3 becomes low, ``1'' is set to CFFJBC, and ``5'' is set to CFFJBC. In this way, the routine moves to the rCFJB5J routine shown in FIG. Note that the reason why the motors M2 and M3 are set at low speeds as in the case of two sets is to improve the accuracy of the stopping position of the computer paper original 1- in this case as well.

In the rCFJB5J routine, the aforementioned counter M3T
Check whether the PC has counted a predetermined number, "44" in this example (Fig. 13 ■). This corresponds to the distance until the printed portion of the final page reaches a predetermined position on the platen 6. Therefore, in this case, drive motor M2. The brake is rapidly applied to M3 to stop it, and the computer paper document is stopped (Fig. 13 -). Also CFF
The JBC is set to "6" (Fig. 13 (■)), and a no-document command is sent to the CPU 112 of the copying machine main body 4, indicating that it is the last page of the computer paper document.

As shown in Figure 14, in the rCFJB6J routine,
After the last page is illuminated, the drive motor M2. Operate M3 at high speed H to eject computer paper document 1 (
Figure 14 ■). Also set "7" to CFFJBC,
The timer CFEDTM (computer form end timer) for ejecting the last page is cleared (Fig. 14 -).

The paper discharge command shown in Figure 14 (■) is also a command to invert and transport the computer paper document when the double-sided document copy mode is selected by mistake. A command to convey the computer paper document without reversing it is output.

In the routine of rCFJB7J shown in FIG. 15, after the timer CFEDTM times up ((■) in FIG. 15), the drive motor M2. M3 is turned off, the OFF mode flag is reset, and CFFJBC is set to "0" to be in the initial state, thereby ending the series of OFF modes.

As for the overall flow, while the computer paper original 1 is being copied continuously, CFFJBO to CFFJB4
Repeat, and on the final page CFFJBO, CFFJBI,
CFFJB2, CFFJB5, CFFJB6, CFFJ
The process of B7 will be performed.

By the way, the counter CFFJMT cleared in the step shown in FIG.
3 is incremented each time the routine is entered. That is, this counter is cleared every time the first sensor 36 detects the tip edge of the sprocket hole 3,
When the counter counts 5o in this example, the time between the leading edges of two adjacent sprocket holes of a computer paper document that is normally conveyed without jamming is longer than the time it takes for the computer paper document to pass through the first sensor 36, and the computer paper document is transported normally without jamming. The system is configured to determine that the document is jammed. More specifically, in the rCFJB3J routine shown in FIG. 11, before the counter CFFCNT counts the number of sprocket holes for one page (22), the counter CFFJMT is checked (see FIG. 11).
When this counts 50 pulses, it is determined that a paper document jam has occurred, and the drive motor M2.
Turn off M3 and set the jam flag used for various jam processing (Fig. 11 -).

If the computer paper document 1 is being conveyed without jamming, the counter CFFJMT is cleared before counting up to 50 pulses. For example, the pitch of the sprocket holes 3 is 172 inches,
The first sensor 36 detects the tip edge of the sprocket hole 3 every 20 to 30 m5ec, and this is detected by the counter CF.
The counter CFFJM shall be counted by FCNT.
Assuming that T is counted up (incremented) every 2 to 3 m5ec, if the computer paper document 1 is being conveyed normally, CFFJMT will be cleared when it counts 10 to 15 pulses, and will be cleared when the count reaches 50 pulses or more. is not reached. Counting backwards, the time interval for detecting hole 3 in a computer paper document is 100 to 150m5e.
When more than c cannot be detected, a jam is detected and the drive motor M2. M3 is turned off.

In this example, the encoder E3 attached to the drive motor M3 and the counter M3TP that counts its pulses are mainly used.
By C, after the second sensor no longer detects the computer paper document, the conveyance and stopping of the computer paper document is controlled so that the computer paper document is fed to a predetermined position on the platen. To. In place of the encoder E3, a timer means may be used, and in place of the encoder E3, an encoder attached, for example, to any of the conveyance bells 1-15, or to any of its rollers or shafts, etc., may be used.

In this example, when the illumination of the computer paper document on the platen 6 is finished, a paper discharge command is sent from the copying machine side, but the immediate action motor M2. M3 starts its operation only in response to this paper discharge command, and immediately operates the conveyor belt 1-5 and discharge device j-8, which are examples of conveyance members, in order to convey the combination coater paper document. A complete computer paper document is not conveyed by a paper feed command from the copying machine main body.

In this case, the first page of the computer paper manuscript 1 can be manually transferred onto the platen G and copied without any trouble. If a computer paper document is conveyed by a paper feed command in the same way as when copying a sheet document, the combicoater paper document will be sent out from the platen 6 before the first page starts copying, and the specified copying process will be carried out. becomes impossible.

Furthermore, in the CFF mode, it is also possible to transport the computer paper document by the paper feeder 16 that sends the normal sheet-1 document. and the separation valve 1-- which presses against this.
Since the paper document 25 is provided with a stiff plate 25, when the computer paper document passes between the paper plates 25 and 25, it is subjected to a large frictional force, which may cause the paper to skew. Even though a normal sheet document receives frictional force from the separation roller 24 and separation blade 25, it rarely skews due to the short length of the sheet document, but computer paper M document 1 Since it is long, there is a risk that the skew will accumulate little by little and eventually appear as a large skew. For this reason,
In this example, the combination coater paper document feeder [117 to 6 normal sheet 1 - paper feeder that feeds the document to the platen 6] 6
It is provided separately from the computer paper document to prevent the frictional force caused by the separation roller 24 and blade 25 from acting on the computer paper document when the computer paper document is conveyed, and to prevent the skew of the computer paper document.
It is above. Further, a conveyance member for conveying the computer paper document, such as a pair of conveyance rollers, may be provided between the paper feed n17 and the platen 6. -, the first page of the computer paper document is already located under the conveyor belt 15, and therefore the computer paper document can be sequentially conveyed by the conveyor belt 15 without providing the above-mentioned conveyance member. can. Therefore, in this example, no conveyance member is provided in the conveyance path from the paper feed port 7 to the platen 6. Thereby, the cost of the automatic document feeder 5 can be reduced.

By the way, in the embodiment described above, the CPU 38 was used to switch from the control of transporting and stopping the computer paper document by the first sensor 36 to the control by the encoder E3, but FIG. 17 provides a better understanding of such switching means. A concrete example with a simple structure is shown below.

In FIG. 7, before the trailing edge of the final page of the computer paper manuscript 1 passes through the first and second sensors 36 and 37,
A detection pulse is output from the first sensor 36 that detects the entry block 1-hole 3 of the computer paper document, and is input to the J-th AND circuit 50. On the other hand, the second
When the sensor 37 detects a computer paper document, the output from the sensor 37 becomes L level, which is input to the second AND circuit 51 and inverted by the inverting circuit 52. The signal becomes H level and is input to the AND circuit 50. Further, the pulse output of the encoder E3 of the drive motor M:3 is input to the second AND circuit 51 via the frequency divider 53. The outputs of the first and second AND circuits 50, 51 are both input to the OR circuit 54, and the output thereof is input to the CPU i-38 of the automatic document feeder.

In the above state, the first AND circuit 50 outputs a pulse corresponding to the pulse output of the first sensor, which is input to the OR circuit 54, but the output from the second sensor 37 is at L level. Therefore, there is no AND output from the second AND circuit 51. Therefore, the OR circuit 54 outputs a pulse signal corresponding to the output of the first sensor 36, which is input to the CPU 138 and counted by the counter. This operation is performed during the period indicated by Wl in FIG. 18, and the conveyance and stopping of the computer paper document is controlled.

Next, when the trailing edge of the last page of the computer paper document passes through the first and second sensors 36 and 37, the second sensor 37
no longer detects the computer paper original, and its output becomes H level. Therefore, the output is the first AND circuit 5
0 is inputted at L level, and is inputted to the second AND circuit 51 as it is at H level. On the other hand, the first
The output of the sensor 36 is kept at H level, and the output of the encoder E3 via the frequency divider 53 is input to the second AND circuit 51 as in the above case.

Therefore, the AND output from the first AND circuit 50 disappears, and the output from the second AND circuit 51 corresponding to the pulse output of the frequency divider 53 is input to the OR circuit 54. Therefore, the OR circuit 54 outputs the same pulse output as the output from the frequency divider 53, which is input to the CPU 138 and counted, thereby controlling the conveyance and stopping of the computer paper document. This operation is performed during the period indicated by W2 in FIG.

Note that when the trailing edge of the last page of the computer paper manuscript passes the second sensor 37 and its output changes from L level to H level, that signal is input to the CPU 138, and thereby the output from the first sensor 36 is The counter CFFCNT that counts the output pulse signals as described above is switched to the counter that counts the pulse output from the frequency divider 53, and the latter counter counts the pulse output from the frequency divider 53 as described above. will be counted.

As mentioned above, the trailing edge of the computer paper document is connected to the sensor 36.
, 37, the switching means shown in FIG.
control is automatically switched to

Next, when the computer paper document on the platen 6 has been illuminated, drive motor M2. A paper ejection command for activating M3 is generated, and an example of means for generating this paper ejection command will be explained with reference to FIG. 19.

After the first scanner 9 shown in FIG. 2 finishes illuminating the document on the platen 6, it returns to the home position again. At this time, the home scanner sensor 60 shown in FIG. 19 is turned on and its output is turned on. The signal is input to the AND circuit 61.

On the other hand, before starting copying, the operator sets the number of copies to be obtained from one document, and the set number of copies is set in the counter 62 shown in FIG. 19.

As the pages of the computer paper manuscript are sequentially copied, the copy counter counts the number of copies, and the set number of sheets set in the counter 62 is subtracted by this. When the counter 62 detects "O",
A copy end signal is output, and this is input to the AND circuit 61. At this time, the output of the home sensor 60 is also input to the AND circuit 61, and therefore, the AND circuit 61 outputs a paper discharge command. Based on this, the drive motors M2 and M3 start operating, and the computer paper document is conveyed by one page.

The configuration according to the present invention described above prohibits the double-sided document copy mode on the automatic document feeder side when copying a computer paper document, but it may be configured so that this is performed on the copying machine main body side. You can also do it. In this case, as shown in Fig. 20, the CPU of the copying machine body side checks whether the double-sided original copy mode has been selected (
If so, it is checked whether it is in CFF mode (Fig. 20 -). When not in CFF mode, double-sided original copy mode processing is performed (Fig. 20■)
, when the CFF mode is selected, the double-sided original copy mode is prohibited (FIG. 20 (2)). This prohibition process may include automatically switching the copy mode to one-sided original copy mode, or displaying one-sided original copy mode on the display. Further, in the CFF mode, the key input device 100 (FIG. 2A) is configured to prohibit reception of keys for double-sided originals. ” is also possible.

Although an example in which the present invention is applied to an electrophotographic copying device has been shown above, it is obvious that the present invention can also be applied to a digital copying device.
The present invention can also be applied to a copying apparatus in which a sheet original is reversely conveyed after being illuminated, and the sheet original is reversed before being sent to a platen.

〔Effect of the invention〕

According to the present invention, even if the duplex original copy mode is accidentally selected when copying a computer paper original, damage to the computer paper original and occurrence of jamming thereof can be prevented.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the present invention, FIG. 1A (a). (c) explains the situation of a computer paper original and the printed part formed on it, Fig. 1A (b) shows a copy paper with an image copied in the normal position, and Fig. 1A (d) shows the image printed on it. FIG. 2 is a cross-sectional view showing a part of the copying machine main body and an automatic document feeder;
Figure 2A is a diagram showing an example of a ghee-powered device, Figure 3(a)
, (1)) is an explanatory diagram showing the manner of discharging sheet originals;
The figure is an overall circuit block diagram, Figure 4A is an overall flow diagram of the automatic document feeder, and Figures 5 to 1-5 are flowcharts in CF F mode. FIG. 17 is a block diagram showing another configuration example of the switching means, FIG. 18 is a timing chart corresponding to the configuration shown in FIG. 17, and FIG. 19 is a diagram showing the paper feed command generation means. FIG. 20, a plotter diagram showing an example, is a flowchart when the double-sided original copy mode is prohibited on the copying machine main body side. 1- Computer paper original 6 Platen 100 Input means 101 First command generation means 102 Discrimination means 103 Second command generation means 104 Original transport means

Claims (1)

[Claims] In a copying device that performs copying operations by controlling the conveyance and stop of a document and illuminating the document stopped on a platen, there is a double-sided document copy mode in which images on both sides of the document are sequentially copied, and a single-sided document copy mode in which only images on one side of the document are copied. an input means for selecting a document copy mode; a first command generation means for outputting a command to reverse the document in the double-sided document copy mode and to convey the document without reversing the document in the single-sided document copy mode; and a computer paper document or sheet. a means for determining whether the document is a document, and a means for conveying the document without inverting it regardless of the copy mode when the document is a computer paper document, and a command for the first command generating means according to the copy mode when the document is a sheet document. 1. A copying apparatus comprising: second command generating means for outputting a command to convey the document according to the instructions; and means for conveying the document according to the command from the second command generating means.