JP2669294C - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION       [0001]   [Industrial applications]   BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine, and in particular, can compositely copy a plurality of original images on one copy paper.
Related to various copiers.       [0002]   [Prior art]   Conventionally, reducing the consumption of copy paper, or
To reduce the volume, a two-sided copy function that copies two documents on the front and back of one copy sheet
Various types of copiers are provided. In such a copying machine, two originals are one
, The consumption of the copy paper is reduced by half compared to the one-sided copy.
Both of them have an excellent advantage that the volume of the copy is reduced to half.       [0003]   [Problems to be solved by the invention]   By the way, if there is an image on the back, it is not convenient depending on the use of the document etc.
was there. For example, the back side image is reflected on the front side, making it difficult to see the document.       [0004]   Therefore, the present invention allows two original images to be copied on the same side of one copy paper.
And reduce the consumption of copy paper, as well as the volume of copies produced by copying.
It is an object of the present invention to provide a copying machine capable of reducing the product. Also, the present invention
When copying two original images on the same side of one copy paper, select the copy paper of the optimal size.
An object of the present invention is to provide a copying machine that facilitates selection.       [0005]   [Means for Solving the Problems]   To achieve the above object, a copying machine according to the present invention comprises
Feeder and copy two originals side by side on a single copy sheet
hand,Automatic document feeding means for feeding a plurality of documents sequentially from the last page of the document and providing it for copying
Whether the number of originals to be copied by the automatic original feeding means is even or odd.
Determining means for determining;Setting means for setting the automatic paper selection mode
A document that detects the size of the first document out of two documents copied side by side
In the automatic paper selection mode, the document size
Determined by the size of the first original document detected by the detecting means and the copy magnification.
Paper selection to select a paper feed unit loaded with a copy paper of twice the applicable size
MeansIn the automatic paper selection mode, when the number of originals is odd,
If it is determined that the original size of the last page is copied,
Is determined by the original size and copy magnification of the original of the last page detected by
Select a paper feeder loaded with a copy paper of twice the compatible size, and
Control means for copying only the last page of the original on one copy sheet fed fromOctopus with
And features.       [0006]   [Action]   In the copying machine of the present invention, the original size detected by the original size detecting means is used.
And a copy paper size twice as large as the compatible size selected by the copy magnification
The two originals are arranged and copied on the same side of the document.If the number of originals is odd
Is twice the compatible size determined by the original page size and the copy magnification.
Select the paper feed unit loaded with the copy paper of the size, and select one paper fed from this paper feed unit.
Copy only the last page manuscript on copy paper.       [0007]   【Example】   First, an outline of a copying operation in a later-described composite second mode particularly related to the present invention is shown in FIG.
It will be explained by. The automatic document feeder 30 feeds the document with the side to be copied facing downward.
Documents OR2 and OR1 are fed in order from the top of the document placed on the ray 32
Is fed to a position just before the pinch roller 38. First, the first (odd number) original
OR2, that is, in a two-page document, the document OR2 on the second page is
The document is conveyed toward the document table 39 by the roller and the conveyance belt. The end of the document OR2 is
When the document is detected by the sensor 37, the document is conveyed by a predetermined distance 11 and then stopped, and the document shown in FIG.
Positioned in position. In this state, scanning exposure is performed and copying is performed.
Is formed on the copy paper twice as large as that shown in FIG.
ing. This copy paper is temporarily stored in a re-feed tray in the main body of the copying machine. like this
When the required number of copies of the original OR2 are completed, the second (even-numbered) original O
R1, that is, the original OR1 of the first page of the original consisting of two pages is fed.
When the trailing end of the document OR1 is detected by the sensor 37, it is determined that this time is the even-numbered sheet.
After being transported by the total distance (11 + 12) of the fixed distance 11 and the width 12 of the document,
And is positioned at the position shown in FIG. In this state, scanning is performed and copying is performed.
However, at this time, the copy paper on which the odd-numbered document OR2 has been copied first is placed in the refeed tray.
COPY2, the paper is shown as COPY2 in FIG.
The originals of the odd-numbered pages and the even-numbered pages are copied.       [0008]   Hereinafter, examples of the present invention will be specifically described. FIG.
A copy mode of a composite copy mode suitable for installing and using the manuscript feeding device 30 is provided. FIG. 3 is a cross-sectional view illustrating main components of the copying machine obtained. In the figure, 1 is the main body of the copying machine, 2
Denotes a scanning optical system, 3 denotes a photosensitive drum, 4 denotes a developing device, 5 denotes a first sheet feeding table, and 6 denotes a second sheet feeding unit.
The paper feed trays 7, 8 feed the copy sheets on the first and second paper feed trays one by one.
Paper feed rollers 9, 10, and 11 are transport rollers that transport copy paper to a transfer position;
Denotes a conveyance path, 13 denotes a conveyance belt for conveying the copy paper on which the toner image has been transferred, 14, 1
5 is a pair of fixing rollers, and 69 is an eraser.       [0009]   Reference numeral 16 denotes a conveyance path of the fixed copy paper, and reference numeral 17 denotes whether the copy paper is discharged or
A switching claw 18 for switching whether to convey the sheet to the re-feed tray 20 is provided for conveying the sheet to the re-sheet tray.
Road 19 is used for both-sided copying and composite copying for copying paper.
The transport path switching claw for changing the direction of the front and back of the paper.
The sheet is conveyed to the re-feeding tray 20 and, in the case of double-sided copying, re-feeded
This is for switching to transport to a ray. 20 is a re-feed tray, 22 is a re-feed tray
Feed rollers for feeding the copy paper on the paper tray, 23 and 24 are guides for the refeed tray.
The plate is set at an appropriate position according to the sheet size. In addition, these guide plates 23
, 24 are a paper feed slot when the number of copy papers corresponding to the predetermined number of copies inputted by the key is stored.
Roller 22 is retracted upward, and the copy paper is moved under the feed roller, and paper can be fed.
It has a function to set a state. Reference numeral 30 denotes an automatic document feeder on the document table 25 of the copying machine 1.
Will be installed. The configuration will be described later. Reference numeral 50 denotes a known sorter.       [0010]   Next, the automatic document feeder 30 will be described with reference to FIG. 31 is original feeding
, 32 is a document tray, 33 is a feed roller, and 34 and 35 separate the documents one by one.
The separation roller 36 feeds the original document one by one to detect whether or not the original document has been reliably fed one by one.
The separation sensor 37 controls the stop position of the fed document so that the trailing edge of the document can be controlled.
An entrance sensor for detecting an excessive time, a transport belt 39 for transporting the original, and a driving roller
40 and a tension roller 41. 42 pushes the transport belt to the platen
It is a roller to stick. 45 is a document discharge section, 46 is a discharge document feed guide, 47,
Reference numeral 48 denotes a guide roller, and 49 denotes a discharge tray for receiving a document after exposure.
is there. Reference numeral 44 denotes a paper discharge sensor for detecting the trailing end of the discharged document.       [0011]   FIG. 4 shows an operation panel of the automatic document feeder 30.
The boundary erase key 72 for requesting the erase of the boundary between two documents is set to the copy mode.
2nd mode key 71 for selecting the 2nd composition mode by pressing
APS mode that automatically selects copy paper suitable for
AMS mode to automatically select the copy magnification and copy magnification and copy paper
A selection key 70 for selecting one of the MUL modes to be manually selected;
Lamps 65-1, 65-2, 65-3, 65-4, 65- for displaying these modes
5 are provided. Note that the combination mode as the copy mode includes the first combination mode.
There are two modes, the first mode and the second mode.
This is to copy another original by superimposing it on the copied copy paper.
Is a copy system that operates in conjunction with the automatic document feeder 30 in the copy mode according to the present invention.
The two originals supplied continuously in the system are copied on the same side of one copy paper
Mode.       [0012]   Next, the operation will be described. First, operate the key 71 on the operation panel of the copier.
To select the second composition mode, and further operate the selection key 70 to set the mode as AP.
One of S, AMS, and MUL modes is selected. Also, automatic document feeder
30 is placed on the original tray 32 with the original side down, and the last page at the top of the original is
Prepare to be sent from.       [0013]   When the user presses the print key 73 on the operation panel and enters the copy operation, the document tray 32
The uppermost document of the upper document OR is sent out by the feed roller 33 and separated by a separation roller.
At first, the original OR2 of the first (odd number) document is pinned.
It is sent out to the chill roller 38. The transmission timing is short due to the known timing adjustment means.
Then, the pinch roller 38 rotates and sends the document OR2 under the transport belt 39.
The transport belt 39 is moved in the direction of arrow a by the drive roller 40, and the original OR
2 is held by a frictional force and is conveyed in the direction of arrow a.       [0014]   A pulse generating disk (not shown) is attached to the motor shaft that drives the pinch roller 38
A predetermined time has passed since the trailing edge of the document was detected by the entrance sensor 37.
After counting, the rear end of the document exceeds the reference point P, the pinch roller 38 and the conveyance belt 39 are stopped.
Stop, and furthermore, the transport belt is determined by the time counted by the previous timer and the moving amount.
The document is moved in the opposite direction (the direction of arrow b), and the rear end of the document is moved to a reference point P (
At 1, it is stopped at the position of the distance 11 by the entrance sensor 37.       [0015]   The document is positioned at a predetermined first position (position A in FIG. 1) on the platen 25.
A series of exposure, development, and fixing copying from the automatic document feeder 30 to the copying machine body
Operation is commanded. The scanning optical system 2 scans the original and forms an electrostatic latent image on the photosensitive drum 3.
To form The electrostatic latent image is developed, and is conveyed from the paper feed table 5 or 6 to the conveying rollers 9, 10,
The image is transferred onto a copy sheet fed through a conveyance path 11. The toner image is transferred
The copied paper is transported by the transport belt 13 to the fixing rollers 14 and 15, and the toner image is
Fixed on copy paper. The above is the copying process of a normal copying machine.
However, the copier has a well-known copier such as a charger, a transfer unit, a static eliminator, and a cleaner.
Of course, there is a configuration.       [0016]   The copy paper on which the fixing is completed is discharged from the fixing rollers 14 and 15, but the copy mode
When the combination second mode is selected, the printer is provided in the middle of the transport path.
The switching claw 17 switches the transport path 16 toward the re-feed tray 20. Therefore,
The copying paper enters the transport path 18. At the exit of the conveyance path 18, a paper
To the reversing conveyance path 21 for reversing the surface, or the first or second synthetic mode
In this case, there is a switching claw 19 which is directly carried into the re-feeding tray 20, and in this case,
Since the composite second mode is selected as the copy mode, the switching claw 19
The direction is switched to a direction directly entering the re-feed tray 20. The loaded copy paper is
The sheets are stored at predetermined positions on the re-feeding tray 20 by the guide plates 23 and 24. Hide
The copying operation is repeated for the set number of copies, and the first (odd-number) original is copied.
Copying ends.       [0017]   Next, the feed roller 22 on the re-feed tray 20 is retracted upward, and
The copy paper on the sheet No. 0 is moved to the left in FIG.
Is set to Then, the feed roller 22 is lowered and the first original is copied.
Is fed as copy paper to copy the second original in the margin of the copy paper
Ready to be.       [0018]   Automatically outputs the copy end signal for the first (odd) document output from the copier
When the feeder 30 receives the document, the automatic document feeder 30 starts a document exchange operation. First carry
The feed belt 39 moves in the direction of arrow a in FIG. 3, and the first (odd-number) original is
The sheet is conveyed between the feed guide 46 and the guide rollers 47 and 48 and is
Is discharged. At this time, the discharge is detected by the discharge sensor 44. With the discharge sensor 44
When the discharge is detected, the next original is sent out by the feed roller 33.
In this case, the rear end of the original is detected by the entrance sensor 37 because the original is the second (even-numbered) original.
The timer that starts counting after the document is read is set at the reference point P (in FIG.
(A position at a distance of 11 from the mouth sensor 37) and a distance corresponding to the width 12 of the document.
The document is stopped by counting to stop at the left position in FIG. Original is platen 25
The automatic document feeder is positioned at the upper predetermined second position (position B in FIG. 1).
A series of exposure, development, and fixing copying operations are instructed from the device 30 to the copying machine main body.
The scanning optical system 2 scans the document and forms an electrostatic latent image on the photosensitive drum. in this case
Since the optical system 2 performs a full scan for scanning the entire surface of the document table, the photosensitive drum
The transport belt 39 of the automatic document feeder 30 is provided at a portion corresponding to the first position of the upper document.
The dirt on the surface of the surface is also formed as an electrostatic latent image.
Is erased by turning on the eraser lamp. At this time, the first sheet (odd number sheet
) And the second (even-numbered) original, a line image may be formed
It is better to widen the width of erasing by the eraser lamp. Electrostatic on photoreceptor drum
The latent image is developed, and the toner image is supplied to a re-feed tray 2 fed by a feed roller 22.
In the upper copy sheet, that is, the blank area on the sheet on which the first original is copied first
Transcribed.       [0019]   The copy paper on which the toner image has been transferred is conveyed to fixing rollers 14 and 15 by a conveyance belt 13.
The toner image is conveyed and fixed on the copy paper. The fixed copy paper is ejected,
Since the processing is for the second (even-numbered) original, the switching claw 17
The direction is changed to the discharge direction toward the heater 50. Therefore, copy paper must be
It is discharged, enters a sorter and is sorted by known means. Prescribed thus set
The copying operation for the number of copies is repeated, and the copying of the second (even-numbered) document ends.
.       [0020]   Copying of the first (odd) and second (even) originals for the third and subsequent pages
The same operation is repeated to complete copying of all originals and complete a series of copying operations.
Complete.       [0021]   The odd-numbered and even-numbered originals are determined based on the edge of the original detected by the entrance sensor 37.
A signal indicating the passage of the original is sent to a microcomputer for controlling the automatic document feeder 30 (hereinafter referred to as a microcomputer).
Hereinafter, it is referred to as an ADF control CPU. ) Count with the counter in 60, and with the counting result
to decide.       [0022]   FIG. 5 is a block diagram of a control circuit for controlling the automatic document feeder 30 and the copying machine main body.
Thus, only the portion related to the second composition mode is shown. Automatic document feeder 30
The copier itself has a control microprocessor, and each microprocessor has its own microprocessor.
The functions of the automatic document feeder 30 and the copier body are controlled by a program executed by the
The operation is controlled.       [0023]   First, an automatic document feeder (ADF) will be described.
The input port I1 has a print key 72, and I2 has an APS / AMS.
/ MUL mode selection keys 70 and I3 are combined second mode selection keys 71 and I4
Is a signal from the boundary erase key 72. Input ports I5 and I6
The signals SEN of the entrance sensor 37 and the ejection sensor 44 for detecting the feeding state of the original, respectively.
・ IN, SEN ・ OUT are input. Also, from output ports 01, 02, 03
Are the high-speed drive signal HI and the low-speed drive signal to the conveyor belt drive motor control circuit 62. The signal LO and the forward / reverse switching signal are output. 63 is a conveyor belt drive motor and a conveyor bell
The speed and rotation direction are controlled by the
The pulse from the pulse generator provided in the ADF control CP
Input to the input port IP of U60. The output port of the ADF control CPU 60
From 04, a drive circuit 64 is provided with a clutch for transmitting power to a pinch roller.
ON / OFF signal, brake operation signal, and APS / AMS /
Signals for displaying the MUL mode and displaying the composite second mode are output, and the clutch
, The operation of the brake, the display of the display lamp of the display unit 65, and the like.       [0024]   On the other hand, the input port Ia, Ib, Ic,
Dimensions and orientation of the document (hereinafter, the direction in which the long side of the paper is set in the paper transport direction
The direction in which the vertical and short sides are set in the paper transport direction is referred to as horizontal. ) Is A4 side or B
5 The detection signal SEN / OR of the sensor for detecting the side, etc.
Detection of the paper size signal SEN / PA stored in the cassette and the end of scanning of the scanning optical system 2.
Knowledge signal SEN / SC, and detection signal SEN / DM of rotation angle position of photosensitive drum
Is entered. The output ports Oa and Ob provide scanning optical system drive motor control circuits.
The scanning optical system driving signal and the forward / reverse switching signal are output to the path 66. 67 is scanning light
Rotation stop and forward / reverse rotation are controlled by the control circuit with
The pulse from the pulse generator provided on the motor shaft is copied via the control circuit 67.
An input is made to the input port IS of the machine body control CPU 61. Also, the copier control CP
From the output port Oc of U61, the drive lamp 68
A light control signal is output.       [0025]   Various control signals are transmitted between the ADF control CPU 60 and the copy body control CPU 61.
The exchange is performed, and the output ports O5, O6, O7, and O8 of the ADF control CPU 60 are used.
Indicates that the original size signal ORSZ, the copy start signal CPST, and the original
Is output, and a COM2 signal indicating the second synthesis mode is output.
And input to the input ports Ie, If, Ig, Ih of the copy main body control CPU 61.
. The output ports Od and Oe of the copy main body control CPU 61 output copy paper size information.
issue PASZ and a copy end signal CPFN are output, and the input port of the ADF control CPU 60 is
Are input to ports 17 and 18.       [0026]   Next, a control program executed by the ADF control CPU 60 and the copy body control CPU 61 is executed.
The process will be described with reference to FIG. 6 and flowcharts up to FIG.       [0027]   FIG. 6 shows an outline of a main routine of a program executed by the ADF control CPU 60.
It is a flowchart which shows an abbreviation. Clears memory and resets flags when power is turned on.
Initialization of a set or the like is performed (step S1). Then manage the operation of the main routine
An internal timer is set (step S2). Signals input from various sensors and
Processing of an output signal such as a drive motor operation command is performed (step S3).       [0028]   It is checked whether or not the automatic document feeder 30 is used (step S4).
If 30 is used, the mode input as the copy mode, for example, the normal mode,
Set the mode to set required flags etc. according to the input signal such as the synthesis mode.
Now (step S5). Start feeding the document, and the document is fed to the pinch roller.
Stop (step S6).       [0029]   It is determined whether the copy mode is the composite second mode (step S7).
If not, the process proceeds to step S11, and will be described in detail later.
Then, the process proceeds to step S12. In the case of the second synthesis mode, step S
Proceed to step 8 to determine whether a flag indicating that the document is an even page is set
Find out.       [0030]   When the flag indicating that the document is an even page is set,
A subroutine C2 (step S9) is executed, and the process proceeds to step S12. Also on
If the flag is not set, that is, if the document is an odd page,
A mode 1 subroutine (step S10) is executed, and the process proceeds to step S12.       [0031]   The size of the original is detected by key input or the fed original is detected by a sensor.
(Step S12), wait for the end of the internal timer (step S13), and wait for the next cycle.
The process returns to step S2 to shift to the processing of the file.       [0032]   When the automatic document feeder 30 is not used in step S4,
A document forgetting process such as a display indicating that no document is placed is performed (step S14).
Proceed to step S13.       [0033]   Next, steps S10, S11 and S9 are shown in the flowchart of FIG.
The transfer mode 1 and transfer mode 2 subroutines will be described.       [0034]   First, the transport mode 1 subroutine will be described with reference to the flowcharts of FIGS.
explain. Check with the feed counter etc. (not shown) whether the original to be conveyed is the first
(Step S21) If it is not the first sheet, the process proceeds to step S30. If it is the first one
It is checked whether or not the entrance sensor 37 has detected the leading edge of the document (step S22).
The document has been fed to the pinch roller entrance,
Step S23). When the feeding of the document is completed, the process proceeds to step S24. Step S2
2. If the determination result in S23 is negative, the process returns to the main routine.       [0035]   In step S24, the total number of documents to be copied set in the document tray is odd.
Check if there are several copies. This is because when the total number of originals is an odd number,
In copying, only one original is copied last, so the left side is on the copy paper.
Is a blank sheet (shown as COPY1 in FIG. 1), and has a good appearance
In this case, the original to be copied, that is, the last page
Copy on the left side of the copy paper so that a blank area is formed on the right side of the copy paper
It is a judgment for. Note that the total number of documents set in the document tray is odd or even.
Document number input means (not shown) such as several keys, for example, a key switch on an operation panel
Can also be entered from the
You can also.       [0036]   If the result of determination in step S24 is that the total number of documents is an odd number,
With the clutch turned on, the conveyance belt 39 is driven at a low speed to move the original to the position B on the original platen 25.
(See FIG. 1), and sets the even page flag for the next original.
Steps S25, S26, S27). As a result, the subsequent processing is performed in the transport mode 2 support.
Process. Also, as a result of the determination in step S24, the number is not an odd number.
At this time, the clutch of the pinch roller is turned ON, and the conveyance belt is driven at high speed to copy the original.
The sheet is transported to the position on the platen 25 (see FIG. 1) (steps S28 and S29).       [0037]   Proceeding to step S30, the desired number of documents for the document positioned on the document table 25
Check the end of copying. If copying is completed, drive the conveyor belt 39 at high speed.
Conveys the document to the discharge unit 45 and adjusts the timing for feeding the next document.
The timer TM3 is set (steps S31, S32). When copying is not complete
Steps S31 and S32 are omitted, and the process proceeds to step S33.       [0038]   In step S33, the end of the time measurement of the timer TM3 is checked.
The process proceeds to step S41, but if it has been completed, the process proceeds to step S34, where the document tray 3
It is checked whether or not all the originals have been fed. If the feed has been completed, the process proceeds to step S35,
Check whether the discharge sensor 44 of the document discharge section has detected the trailing edge of the document.
The timing adjustment tie until the original is completely stored in the output tray 49.
The timer TM6 is set (step S36), and the end of the timer TM6 is checked (step S36).
(Step S37) If the timing has been completed, the transport belt 39 is stopped and the process returns to the main routine.
(Step S38). In step S35, the discharge sensor 44 of the document discharge section
If the end has not been detected, step S36 is omitted, and in step S37, the timer
If TM6 has not finished counting, step S38 is omitted.       [0039]   If all originals have not been fed in step S34, the process proceeds to step S40,
The document is conveyed by turning on the clutch of the pinch roller. The trailing edge of the conveyed document
It is checked whether or not it has been detected by the entrance sensor 37 (step S41). For adjusting the timing at which the transport belt 39 transports the document to a predetermined position on the document table 25
The timer TM7 is set (step S42). If a document is not detected,
Step S42 is omitted. Proceed to step S43 to check the end of time measurement by the timer TM7.
. If the time measurement has not ended, the process proceeds to step S50.
Stop the belt 39, turn off the pinch roller clutch, and turn on the brake to copy the original.
The transport drive portion is stopped (steps S44 to S46), and the next original is
The document feed flag for feeding the document to the pinch roller 38 is set (step S4).
7). In addition, the original that is slightly ahead of the normal position and is stopped is moved to the normal position (after the original).
Timing for moving the conveyor belt 39 in the reverse direction until the end coincides with the point P)
The adjustment timer TM8 is set, and the copy start flag is set (step S4).
8, S49).       [0040]   The end of the timer TM8 is checked (step S50).
The brake of the feeding belt 39 is turned off, and the conveyance belt 39 is driven to rotate in the reverse direction to open the copy.
Reset the start flag and set the reverse rotation drive time timer TM9 for the conveyor belt.
(Steps S51 to S54). In the reverse rotation driving time, the original is fed by the pinch roller 38 first.
When sent, the number of rotations counted by the pulse generator attached to the pinch roller drive shaft
Since the length of the original sent beyond the normal position is known based on the
The time is set such that the transport belt 39 is driven to rotate in the reverse direction by the amount to be corrected.       [0041]   The end of the timer TM9 is checked, and the end of the timer, that is, the original is set at the normal position.
At this time, the reverse rotation of the transport belt 39 is stopped, and the odd page flag is reset for the next original.
Set, and set the even page flag (steps S57, S58, S59),
Return to main routine.       [0042]   If the timer TM8 has not finished counting in step S50,
Steps S51 to S54 are omitted, and the process proceeds to step S56.
If the time measurement of the timer TM9 has not ended, steps S57 to S59 are omitted, and
Return immediately to the main routine.       [0043]   Next, the transport mode 2 subroutine will be described with reference to the flowchart of FIG.
. First, the end of the copy is checked (step S61).
The document 39 is driven at a low speed to convey the document to the discharge unit 45 and to feed the next document.
The timer TM3 for adjusting the timing is set (steps S62 and S63).       [0044]   Here, the point that the transport belt is driven at a low speed will be described. The first manuscript is shown in Figure 1.
To stop at the position A, the document is positioned at the reference point P.
The end of the platen (original glass), where the reference position is set by the positioning member
It is driven at high speed because it is possible.       [0045]   On the other hand, when the document is stopped at the position B, the stop position differs depending on the size.
Since it is difficult to provide a positioning member, it is necessary to stop the conveyed document.
It is driven at low speed to increase the accuracy of placement. In the embodiment, the high-speed drive is 1000 mm / s
ec, low-speed driving is set to 200 mm / sec.       [0046]   If the copy is not completed in step S61, steps S62 and S63
Omitted. The process proceeds to step S64 to check whether the timer TM3 has finished measuring time.
If YES, the process proceeds to step S65 to check whether or not all the originals on the original tray have been fed.
. If the document has been fed, it is determined whether the discharge sensor 44 of the document discharge section has detected the trailing end of the document.
Check (step S66). When the trailing edge of the original is detected, the original is completely
Set the timer TM6 for adjusting timing until it is stored in the storage unit 49 (step S
67), checking whether the timer has finished counting (step S68).
Stop the feed belt 39, reset the even page flag, and reset the odd page flag.
To return to the main routine (steps S69, S70, S71). Step S66
If the discharge sensor 44 of the document discharge section does not detect the rear end of the document, the process proceeds to step S6.
Step 7 is omitted, and if the timer TM6 has not completed time counting in step S68,
Step S69 is omitted.       [0047]   If all originals have not been fed in step S65, the process proceeds to step S72,
The original is fed with the clutch of the pinch roller turned ON. The trailing edge of the fed document
It is checked whether or not it has been detected by the entrance sensor 37 (step S73).
A timing adjustment tie for the transport belt 39 to transport the document to a predetermined position on the platen
The value TM4 is set (step S74). This timer TM4 depends on the size of the original.
Is different. If no original is detected, step S74 is omitted.       [0048]   Proceeding to step S75, the end of the timer TM4 is checked. The timing has not ended
If not, the process proceeds to step S82.
Turn off the clutch of the pinch roller and turn on the brake to stop the document transport drive section
(Steps S76 to S78), and further for timing adjustment of turning off the brake
Set the timer TM5, copy start flag, and document feed flag.
(Steps S79 to S81).       [0049]   The end of the timer TM5 is checked (step S82).
FF, copy start flag reset, even page flag reset, odd page flag
Is set (steps S83 to S86), and the process returns to the main routine. Step S
If the timer TM5 has not finished counting at 82, the process immediately returns to the main routine.
      [0050]   FIG. 9 shows an outline of a main routine of a program executed by the copying main body control CPU 62.
FIG. Clear memory and reset flags when power is turned on
And so on (step S101). Then manage the operation of the main routine
An internal timer is set (step S102). Paper cassette and other sensors
Process output signals such as signals input from the controller and operation commands for various drive systems.
Step S103). Next, a copy mode is set (step S104). Duplicate
Details of the setting of the shooting mode will be described later in detail. Next, the scanning optical system 2 is moved and
A fixed copy magnification is set (step S105), and re-set according to the selected copy paper size.
The guide plates 23 and 24 of the paper feed tray 20 are set (Step S106).       [0051]   It is determined whether or not the copy mode is the composite second mode (step S107).
If it is, the preparatory operation is performed (step S108). This is to refeed tray 20
Setting of the transport path switching claw 17 and setting of the tray guide plates 23 and 24 are performed.
Things. If the mode is not the second synthesis mode, step S108 is omitted.       [0052]   It is determined whether or not the copy start signal CPST output from the automatic document feeder 30 is ON.
A check is made (step S109). If it is ON, a series of copying operations is started. That is, copy paper
Paper, charging the photoreceptor, developing, transferring, copying process such as static erasing, scanning light
Scanning and exposure of the original document by the scientific system, and the electrostatic latent image on the photoconductor
Erase margins, borders, switch the transport path in the second composite mode, refeed tray
The control of operations such as paper supply from the printer and discharge of copy paper is performed (steps S110 to S110).
S116).       [0053]   To wait for the internal timer to finish counting (step S117) and move on to the next cycle
It returns to step S102. In step S109, the copy start signal is not ON.
If not, the process proceeds to step S117 without entering the copying operation.       [0054]   Next, the copy mode set in step S104 in the flowchart of FIG.
In the case where the second composition mode is set from the key 71 of the operation panel
The description will be made based on the flowcharts of FIGS. 10A and 10B, and the description of other cases will be omitted.
Abbreviate. Note that the description here is for a document of A4 size.
Is an example, and the present invention is not limited to this.       [0055]   First, it is checked whether or not the second mode is the synthesis mode (step S121).
If this is the case, the processing returns to the main routine after executing the processing for setting another mode.
If the document is an odd page, it is checked whether or not the document is an odd page (step S122).
If not, the process proceeds to step S132, in which the scanning optical system scans the document over the entire width of the document table.
Set to A3 size corresponding to the surface and set erase mode 2 (step
S133) Return to the main routine. The erase mode will be described later in detail.       [0056]   If the result of determination in step S122 is that the page is an odd page, the flow advances to step S123.
It is checked whether the size of the original is A4 landscape. This is an automatic document feeder not shown
Check with 30 sensors. If not A4 horizontal, other dimensions, such as B5 horizontal
It will be judged whether or not the dimensions are possible for the composite 2nd mode.
The flow chart is the same as the flow chart to be described.
Are different from each other, and the description is omitted.       [0057]   If the size of the original is A4 landscape, the process proceeds to step S124 to determine whether the mode is the APS mode.
Find out what. The APS mode is used to automatically select the appropriate copy paper from the original size.
This is a mode to be selected and set by inputting from the key 70 of the operation panel.
. In the APS mode, check the copy magnification entered separately by key.
Select A3 portrait as the copy paper, and B4 portrait as the paper when the copy magnification is 0.816.
If the copy magnification is 0.707, A4 portrait is selected as the paper (step S
125-S129). Whether the selected paper is in the paper tray or paper cassette
Is checked, and if there is no paper, a warning is displayed and the process returns to the main routine (step S130).
, 131).       [0058]   In this way, in the composite second mode, the matching size selected by the normal APS
By selecting a size twice as large as that described above, a composite copy of two documents can be made.       [0059]   If the mode is not the APS mode in step S124, the process proceeds to step S141 (see FIG. 1).
0b), it is checked whether the mode is the AMS mode or not. AMS mode is from the keys on the operation panel
The mode selected and entered, and copied according to the copy paper dimensions entered separately by key.
In this mode, the magnification is automatically selected. In AMS mode, key input
Select the copy magnification according to the size of the copy paper.
When the paper size is A3 length, the copy magnification is 1.00. When the paper size is A4 length, the copy magnification is.
0.707, if the paper size is B4 portrait, select a copy magnification of 0.816 (step
S142 to S146). Check whether the set magnification range can be set (step S
1 47) If the setting is not possible, a warning process is performed and the process returns to the main routine (step S148).
If the setting can be made, the process proceeds to step S154, and the width of the optical system scanning the original is set to A4
Set the width and erase mode 1 (step S155).
Return to Chin.       [0060]   In this way, in the second synthesis mode, the adaptive magnification selected by the normal AMS is
On the other hand, a magnification of 1/2, that is, a magnification corresponding to half of the copy paper is selected and two originals are selected.
Enables composite copying of manuscripts.       [0061]   If it is not AMS in the judgment of step S141, the process moves to step S151. This
This is for selecting the paper size and copy magnification in the manual mode.
In the above description, A4 portrait is selected as the paper size, and a copy magnification of 0.707 is selected.
Steps S151 and S152). A4 size paper is in the paper tray or paper cassette.
It is checked whether or not it is (Step S153). If there is, the process proceeds to Step S154. Also for
If there is no paper, a warning process is performed and the process returns to the main routine (step S156).       [0062]   When there is a sheet selected in step S130, the process also proceeds to step S154.
. In steps S155 and S133 in the flowcharts of FIGS.
11a and 11b for erase mode 1 and erase mode 2
Explanation will be made based on the FIG. 11A is a flowchart showing the erase mode 1.
First, when copying in the composite mode, a line may appear at the boundary between two documents,
It is checked whether or not a request to erase this is input from the operation keys 72 (scan
Step S161). If there is no request, return to the original routine immediately, but if there is a request,
A timer that checks the set copy magnification and determines the erase width according to the copy magnification.
A flag requesting that a predetermined time be set in T1 is set. That is, copy times
When the copy ratio is 1.00, the flag A is set. When the copy magnification is 0.816, the flag A is set.
B is set, and the flag C is set when the copy magnification is 0.707 (step
S162 to S166), and returns to the original routine.       [0063]   FIG. 11B is a flowchart showing the erase mode 2.
In the source mode, the original to be copied is in the second position (the position B in FIG. 1).
Dirt on the original platen in the first half appears as an electrostatic latent image on the photoreceptor drum,
To prevent re-transfer onto the already copied image on the copy paper,
That is, it is necessary to erase only the A4 size width of the sheet. Therefore, border erase is required
If the request is not input from the operation keys 72, it is necessary to erase the A4 size width.
A request flag is set (step S177). Check other parts, that is, copy magnification
For setting a flag for requesting a timer according to a copy magnification to set a predetermined time.
The minutes (steps S172 to S176) are the same as those in the erase mode 1.       [0064]   Next, the erase control shown as step S113 in the flowchart of FIG.
12A and 12B are flowcharts showing portions related to the erase mode described above.
It will be explained in the chart.       [0065]   First, is the image tip of the electrostatic latent image formed on the photoconductor drum under the eraser?
It is checked from the rotation angle signals SEN, DM, etc. of the photosensitive drum (step S181).
If not, the process proceeds to step S190.
If it is, the process moves to step S182, and the erase request flag for the A4 width is checked (step S182).
Step S182). If the erase request flag is set, the erase lamp 69
The light is turned on (step S183). When the erase request flag is not set
The process moves to step S184, where the timer request flag is checked (step S184). Thailand
If the request flag is not set, the process immediately proceeds to step S190.
If the request flag is set, check whether the flag is A, B or C, and
The time corresponding thereto is set in the timer T1, and time counting is started (steps S185 to S185).
S189). That is, the following time is set.       [0066] (1) When the flag is A       T1 = (TA-A) (2) When the flag is B       T1 = (TB-B) (3) When the flag is C       T1 = (TC−C)   here     TA: Time required to scan A4 size at 1: 1 magnification     TB: Time required to scan A4 dimensions at a copy magnification of 0.816     TC: Time required to scan A4 dimensions at a copy magnification of 0.707     A, B, C: constants. The value determined according to each copy magnification,                 Time equivalent to half of the width Represents       [0067]   The process proceeds to step S190 to check whether the timer T1 has finished counting.
If so, this means it's time to start erasing the border,
The source lamp 69 is turned on (step S191). If you have not finished timekeeping
Steps are skipped.       [0068]   Proceeding to step S192, the trailing end of the electrostatic latent image formed on the photosensitive drum is
It is checked from the signal of the rotation angle of the photosensitive drum whether or not it has come under the eraser. Eraser
If it is not below, the process proceeds to step S203.
The erase request flag is checked (step S193). If the erase request flag is set
If not, the process proceeds to step S202, and the erase lamp 69 is turned on.
. When set, check whether the timer request flag is set,
If not set, the process moves to step S201, and the erase lamp 69 is turned off.
You. When the timer request flag is set, whether the flag is A, B or C
Is checked, the time corresponding to each is set in the timer T2, and the time measurement is started.
Steps S195 to S199). That is, the following time is set. This time is time
The erase width is extended by a length corresponding to A, B, and C.       [0069] (1) When the flag is A       T2 = A (2) When the flag is B       T2 = B (3) When the flag is C       T2 = C   Here, A, B, and C are the same constants as described above.       [0070]   Proceed to step S200 to reset the A4 width erase request flag
Proceed to S203.       [0071]   In step S203, the end of the time measurement of the timer T2 is checked.
The slump is turned off (step S204). If the time has not ended, step S
204 is skipped and goes on. Further, it is checked whether the scanning of the original has been completed.
The source lamp is turned off, and the process returns to the main routine (steps S205 and S206). Scanning is
If not, step S206 is omitted and the process returns to the main routine.       [0072]   【The invention's effect】   As is apparent from the above description, in the copying machine of the present invention, the detected original
The size of a copy paper of twice the conforming size determined by the size and copy magnification
Two originals are arranged and copied on one side. Therefore, it is easy to select the optimum copy paper.
This increases the efficiency of copying work. In addition to reducing the consumption of copy paper,
Therefore, the volume of a copy to be created can be reduced. In addition, the paper
The size of the original used is one of the two originals that are copied side by side on the same side of the copy paper.
Because of the size of the first document, feed without waiting for the detection of the size of the second document
The copy can be selected, and the copying speed is improved.Furthermore, if the number of originals is
If it is several sheets, the original of the last page is copied on one copy paper so that one side is blank.
Therefore, the original on the first page is not copied as a blank sheet on one side, and the appearance is good.
Copies can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram of an operation of an automatic document feeder according to the present invention. FIG. 2 is a cross-sectional view showing a main configuration of a copying machine suitable for installing and using the automatic document feeder of the present invention. FIG. 3 is a cross-sectional view illustrating a main configuration of the automatic document feeder. FIG. 4 is a front view of an operation panel of the automatic document feeder. FIG. 5 is a block diagram of a control circuit for controlling the automatic document feeder and the copying machine main body. FIG. 6 is a flowchart of a control process executed by a CPU for controlling operations of the automatic document feeder and the copying machine main body. FIG. 7 is a flowchart of a control process executed by a CPU for controlling operations of the automatic document feeder and the copying machine main body. FIG. 8 is a flowchart of a control process executed by a CPU for controlling operations of the automatic document feeder and the copying machine main body. FIG. 9 is a flowchart of a control process executed by a CPU for controlling operations of the automatic document feeder and the copying machine main body. FIG. 10 is a flowchart of a control process executed by a CPU that controls operations of the automatic document feeder and the copying machine main body. FIG. 11 is a flowchart of a control process executed by a CPU for controlling operations of the automatic document feeder and the copying machine main body. FIG. 12 is a flowchart of a control process executed by a CPU for controlling operations of the automatic document feeder and the copying machine main body. [Description of Signs] 25: Document table 30: Automatic document feeder 32: Document tray 37: Inlet sensor 38: Pinch roller 39: Conveyor belt OR1, OR2: Document COPY1, COPY2: Copy

Claims (1)

[Claims] 1. In a copier that feeds copy paper from a selected paper feed unit and copies two originals side by side on one copy paper and copies them, a plurality of originals are sequentially supplied from the last page original.
Automatic document feeding means for feeding and copying, and copying by the automatic document feeding means.
Determining means for determining whether the number of originals to be copied is even or odd ; setting means for setting an automatic paper selection mode; and first two of the two originals to be copied side by side on the same side of the copy paper.
The document size detection means for detecting the size of the first document, a plurality of paper feeding units, and in the automatic paper selection mode, are determined by the first document size and the copy magnification detected by the document size detection means. Paper selection means for selecting a paper supply unit loaded with a copy paper having a size twice as large as the appropriate size, and in the automatic paper selection mode,
If the number of originals is determined to be an odd number by the determination means, then
The document size of the last page document detected by the document size detecting means is
Loaded with a copy paper of twice the compatible size determined by the
The paper feeder selected is selected, and the last page of the original is placed on one copy sheet fed from this paper feeder.
A copying machine, comprising: a control unit for copying only the image.