JPS62255964A - Copying machine - Google Patents

Abstract

PURPOSE:To continuously copy a document with a single print start operation by automatically performing book divisional copying if the document is detected to contain a document with size other than a specific size corresponding to a copy paper but can be accommodated into this specific size by the book divisional copying. CONSTITUTION:The document supplied from a document sending part 201 has the width detected by a document size sensor SSE arranged in a document carrying part 202 and the passage time of the sensor SSE is monitored to detect the length of the document. If it is detected that the document has a size other than the specific size corresponding to the copy paper but has this specific size in case of book divisional copying, a machine is automatically controlled to book divisional copying to execute book divisional copying. Thus, documents different in size are continuously copies with one print start operation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying machine, and more particularly to a copying machine using an electrophotographic process, which is equipped with an automatic document feeder and is capable of copying in various modes.

In recent years, copying machines that can perform copying in various modes have been provided, among which automatic W,
There is a device that performs book division copying using a document conveyance device (see Japanese Patent Application Laid-open No. 158464/1983).Book division copying refers to dividing an original image into two in the original scanning direction and printing two sheets of copy paper. This is a copy mode in which each page is copied individually, and it is convenient to copy two pages one by one when spread out like a book.For example, as shown in Figure 5,
This is a copy mode in which a copy of an original placed in area (A) on the document platen glass (16) is first copied in area (B), and then in area (C). Note that the document scanning direction is indicated by an arrow (b).

By the way, the document tray of the automatic document feeder has #7. It is possible to place And A
Many of the 3-size manuscripts include two A4-size manuscripts arranged vertically.

In consideration of the above points, the present invention makes it possible to carry out continuous copying processing with a single print start operation by placing documents of the same width size on the document tray of an automatic document feeder at the same time. The purpose is to

In order to achieve the above object, the copying machine according to the present invention does not perform book division copying when the copying paper is of a size other than a specific size corresponding to copying paper during copying using an automatic document feeder. The present invention is characterized by comprising a control means for automatically performing book division copying when the original size detecting means detects a document that can have a specific size corresponding to the copy paper if the above-mentioned copy paper is carried out.

That is, according to the above configuration, when copying originals of the same width size using the automatic document feeder, if the size is other than the specific size corresponding to the copy paper and book division copying is performed, A document that can be a specific size corresponding to the copy paper, for example, an A4 size horizontal document (specific size)
If there is an A3 size document placed vertically (original that can be a specific size in book division copy mode) mixed in, this
When a 3-size vertical YG document is detected by the document size detection means, the copy mode is automatically switched to book division copy mode, and continuous copying of different types of documents is automatically performed with just one print start operation. executed.

An embodiment of a copying machine according to the present invention will be described below with reference to the accompanying drawings.

[Overall structure and operation of the copying machine, see Figure 1] A photosensitive drum (1) is supported at approximately the center of the copying machine body <100) so as to be rotatable in the direction of the arrow (a> in the figure). The surrounding area includes an eraser lamp (2), a charger (3), an image edge/image eraser (4), a developing device (6), a transfer charger (7), a separation charger (8), and a cleaning device (9). The photoreceptor drum (1) has a photoreceptor on its surface, and the photoreceptor is uniformly charged by passing through the eraser lamp (2) and charger (3). and receives image exposure from the scanning optical system (10) through the slit section (5), and an electrostatic latent image is formed on its surface.The image edge/interimage eraser (4)
has a plurality of light emitting diodes arranged in the image width direction, and removes unnecessary charges from the surface of the photoreceptor drum (1) during image formation.

The optical system (10) is installed below the document table glass (16) so that the document image can be scanned, and includes an exposure lamp (17), movable mirrors (11), (12), (13), and lenses. (14) and a mirror (15).

The exposure lamp (17) and the movable mirror (11) operate at (v/+n) (where m: copy magnification)
The movable mirror (12) moves integrally in the direction of arrow (b) at a speed of .

(13) is driven by a scan motor (M3) so as to move integrally in the direction of arrow (b) at a speed of (v/2m>).

In addition, when changing the copy magnification, the lens (14) is moved on the optical axis by the stepping motor (M4), and the mirror (15) is moved and oscillated to correct the optical path. The magnification changing mechanism is already known in principle. Regarding the control of the scanning speed of the optical system (10), the rotation speed of the scan motor (M3) is also controlled according to the copy magnification data, but a detailed explanation of the control method etc. will be omitted. .

Copy paper is fed to an automatic paper feed mechanism (2) that has two cassette loading sections (upper and lower) installed on the left side of the copying machine main body (100) in the figure.
0) or the manual paper feed mechanism (30) installed above it
is fed into the machine by the timing roller pair (21)
After being temporarily stopped by the photoconductor drum (1), the toner image is sent to the transfer section in synchronization with the image that is completely formed on the surface of the photoconductor drum (1), and the toner image is transferred by the transfer charger (7). The sheet is separated from the surface of the drum (1) and sent to a regular inspection device (23) by a conveyor belt (22), where the image is completely fixed and is ejected onto a paper ejection tray (24).

After the transfer, the photoreceptor drum (1) is cleaned by a cleaning device (9).
), the toner and charge remaining on the surface are removed by the eraser (2), and the surface is prepared for the next copying process.

Either the automatic paper feed mechanism (20) or the manual paper feed mechanism (30) is selectively used. In the case of automatic paper feeding, the image forming system including the photoreceptor drum (1) is started by operating the print key (71) (see Figure 2) that starts the copying operation of the copier (<100), and the image forming system including the photoreceptor drum (1) is started. )
When the pre-driving process is completed, the paper feed roller (2
5) or (26) is driven, and the drive of the optical system (10>) is started by a scan start signal output as the copy paper is transported, and the copy paper is fully fed in synchronization with the image forming operation. Two or three sheets of paper are placed on the paper feed roller (25) or (
26), it is pushed out completely by the rotation of
27) and (27'), only the top layer is sent out.

In the sorting mechanisms (27), (27'), the upper rollers (27a), (27a') are in the feeding direction, and the lower roller (27b) is in the feeding direction.

(27b') are rotated in the push-back direction in the direction of the arrow shown in the figure. Paper feed roller (25) or (26)
The second and subsequent sheets of copy paper that are pushed out together with the top layer of copy paper are moved by the lower rollers (27b) and (27b'
), and only the top layer of copy paper is sent out toward the next pair of intermediate rollers (28) or (28').

The intermediate roller pair (28), (28') is associated with the next stage timing roller pair (21) and its drive is controlled, as will be described later.

On the other hand, in the case of manual paper feed, when copy paper is inserted from the manual feed slot (32) and the sensor (34) detects this, the manual paper feed roller (33) rotates and feeds the copy paper into the machine. At the same time or a little later, the photosensitive drum (1) is
> etc. drive starts. Then, the manually fed copy paper is temporarily stopped and on standby at the detection part of the copy paper leading edge detection switch (35), and when the preliminary drive process including the rotation of the photosensitive drum (1) is completed, the paper feed roller (33 ) rotates again, which sends it into the aircraft.

In addition, each cassette mounting section of the automatic paper feed mechanism (20) has
Size detection switch (SWII) ~ (SV14) and (
SV21) to (SV40) are provided, and the activation state of the switch is changed by the arrangement of protrusions or stones (not shown) provided on the cassettes (91) and (92) to be loaded. The size of copy paper is determined using a 4-bit binary code.

[Configuration and operation of automatic document feeder, see Figure 1] On the other hand, the copying machine main body (100) has an automatic document feeder (
200) (hereinafter referred to as ADF), and can perform copying operations in conjunction with each other. This ADF (200
) roughly consists of a document feeding section (201) that stocks documents and feeds them one by one, and a conveyance belt (205) to convey the sent documents over the top surface of the document table glass (16). ) and stop it at a predetermined position on the surface.
It consists of a document transport section (202) that sends the document onto a paper discharge tray (204) after scanning the document. Original transport unit (
202) can be used alone as a manual document feeding device, and when mounted on the copying machine main body (100), it is attached to the copying machine main body (100) so as to expose the document table glass (16). It can be opened and closed, and can be used in the same way as a regular document cover.

A magnet (not shown) is installed in the copying machine main body (100), and when the document transport section (202) is closed, the magnet is sensed and a switch (0) consisting of a reed switch is activated.
5M> turns on and turns off when released.

When this switch (O5$J> is turned on, the ADF (20
0) and the copying machine main body (100) are linked to each other, and the operation mode of the copying machine main body (100) is switched to the ADF mode. ADF mode is the copier main unit (1
When the print key (71) of the copier (100) is operated, the ADF (200) remains in the standby state.
) starts operating, feeds the original placed on the original tray (203) along the top surface of the original platen glass (16), stops at a predetermined position, and moves the original from the ADF (200) to the copying machine main body (100). ), the above-mentioned copying operation starts. When the final scanning movement for the original is completed, an operation signal is output from the copying machine main body (100) to the ADF (200), and the original is ejected. The paper is discharged onto the paper tray (204). At this time, the next document is also transported to a predetermined position. The original is in the original tray (203>
The presence of the document on the top is detected by the document empty sensor (ES). While the presence of a document is detected by the document empty sensor (ES), copying is continuously performed in the ADF mode.

Furthermore, the ADF (200) includes means for automatically detecting the size of the document. In other words, the document feeding section (2
The document fed from 01) is transported to document transport gI(20z>
The width of the original is detected by a plurality of original size sensors (SSE) disposed in the original receiving portion of the apparatus, and the length of the original is detected by monitoring the passage time of this sensor (SSE'). Various methods are already known for detecting the document size, and a sensor (S
The detection method using SE) is just one example.

[Operation panel, see Figure 2] The operation panel (70) is installed on the upper front part of the copying machine body (100), and has a print key (71) for starting the copying operation and a print key (71) for temporarily suspending the multi-copy operation. A blank interrupt key (72), a clear/stop key (73) for stopping the copy operation or canceling the set number, a numeric keypad (74) for setting the multi-copy operation, the number of copies and the status of the copier. A display section (75) for displaying
), up/down keys (76) for setting copy density.
), paper selection key (77) for selecting copy paper size
), a paper size display section (78) for displaying the selected copy paper size, a magnification selection key (79) for selecting the copy magnification, and a magnification display section (79) for displaying the selected magnification. 80), a book division copy key (81) for specifying book division copying, a book division copy display section (82), etc. are provided. Please note that the selection of copy paper is
Considering that copy sheets of the same size are set in a plurality of paper feed ports, two sets of A4 and B5 sheets are provided in advance.

[Control circuit, see Figures 3 and 4] Figure 3 shows the control circuit of the copying machine, (CPUI) is the first microcomputer for controlling the operation of the copying machine main body (100), (CPLI2) is a second microcomputer for controlling the optical system (10). (30
3> is a switch matrix equipped with a display section (75);
(501) is the scan motor (M3) of the optical system (10)
The drive circuit (502) drives the lens (1) when changing the copying magnification.
(304) is a decoder. In addition, the output terminal (A
1) or A7) each have a copy machine body (100)
main motor, developing motor, timing roller clutch.

Transistors (not shown) for driving and switching each of the first paper feed clutch, the second paper feed clutch, the electrostatic charger, and the transfer charger are read directly.

Figure 4 shows the control circuit of the ADF (200), (CPI
J3) is the third controller for controlling the operation of the ADF (200).
A microcomputer is used to drive the document feed roller drive motor (402M), ES (ES), (SSE),
A switch (O5W) is connected. Also, (401
A) and (401B) indicate control signals for switching the drive motor (401) of the document conveyance belt (205) between forward and reverse rotation.

[Control procedure, see FIGS. 6 to 18] Here, the copying machine having the above configuration and the control means based on the control circuit will be described in detail.

FIG. 6 shows the main routine of the first microcomputer (CPUI).

When the (CPUI) is reset and the program starts, the random access memory (
Clears RAM), initializes various registers, and performs initial settings to put each device in its initial mode. Next, in step (B2), an internal timer built into the (CPUI) is started. This internal timer determines the time required for the main routine, and its value is set in advance at the initial setting in step (51).

Next, in steps (B3) to (B6), each subroutine described in detail below is sequentially called, and when the processing of all subroutines is completed, (CPLII) is called by the other (CPU2).
).

Performs data communication with (CPLI3). Finally, in step (B8), one routine is ended after waiting for the internal timer to end. The time length of this one routine is used to count the various timers that appear in each subroutine.In other words, in each subroutine, the number of times each timer counts this one routine is counted. Determine termination.

Figures 7a, 7b, and 7c show the step (B3)
The copy operation routine that can be executed is shown below.

In step <510), it is determined whether the print key (71) is on-edge, and if it is on-edge, step (51)
In step 1), it is determined whether or not the use of the ADF (200) is insufficient. If the ADF (200) is not used, set the print flag to 11. to,
If ADF (200) is used, step (5)
In step 13), it is determined whether there is a document on the ADF tray (203).

If the existence of the original is detected, the AD
Set the F start signal to "1".

Meanwhile, in the step (510), the print key (70'
) is not on-engine, step (51
In step 5), it is determined whether the use of the ADF (200) is selected. If the ADF (200) is used, in step (516) it is confirmed that the original position signal indicating that the original is set in the normal position is "rl", and in step (517) the print flag is set to 11. ”.

Next, in step (518), the print flag is set to rl.

If it is "1", the print flag is reset to "0" in step (519), and step <52
0>, it is determined whether the display unit (82) indicating that the book division copy mode is selected is on. If the display section (82) is turned on, step (5)
In step 25), the automatic book division copy selection routine described in detail below is executed, and in step (526) it is determined whether the magnification mismatch flag is "0." This magnification mismatch flag is specified as the original size. When the copy magnification cannot be automatically set to a value that allows 100% copying of the original image to the copy paper by comparing the size of the copy paper, it is set to rl.Therefore,
When the magnification nonconformity flag is r□, step (523)
Set the lobby start flag to 11.

Further, if it is determined in the step (520) that the display section (82) is off, that is, the book division copy mode is not selected, the automatic paper selection routine is executed in the step (S4), and the automatic paper selection routine is executed in the step (522). It is determined whether the size suitability flag is "10" or not. This size ratio non-conformance flag is set as "1.
It was set in 7th place. Therefore, the size mismatch flag is 10
'', the copy start flag is set to ``rl'' in step (523) as described above.

Subsequently, in step (527), it is determined whether the book division copy flag is "1". The book division copy flag is set to 11 when the book division lobby is selected.
If "1.", then in step (528) this book division copy flag is reset to '0',
In step (529), the book division signal is set to rl, and in step (530), the first half scan signal is set to "1".

Hereinafter, FIGS. 7b and 7c show the overall procedure of the copying operation. In step (531), the copy start flag is set to rl,
If it is determined that the
) to turn on the main motor, developing motor, charging charger, transfer charger, and n-light lamp, reset the copy start flag to "0", and set timers (TA) and (TB). and steps (533), (535)
the first paper cassette (91) or the second paper cassette (92).
) is selected, and step (5)
34), the paper feed of (II) selected in (536) turns on the clutch.

Next, when the judgment end timing of the timer (TA') is confirmed in step (537), step (538) is performed.
So number 1. Turn off the second liner roller clutch. Further, when the judgment end timing of the timer (B) is confirmed in step (539), the scan signal is set to 11'' in step (540). And step (541
> When it is confirmed that the timing signal is "1", the timing roller clutch is turned on and a timer (IC) is set. At step (543>, timer (
When the judgment end timing of TC) is confirmed, the charger is charged in step (544).

Turn off the timing roller clutch and reset the scan signal to r□. Next, step (55
If it is determined in step 4) that the return signal is set to "1", it is determined in step (546) whether or not the multi-copy is completed, and if it is not completed, step (55) is performed.
1) Set the copy start flag to 11. When the multi-copy is completed, in step (547>) it is determined whether the book division signal is "1.", and if it is "1.", the step (
54g), it is determined whether the second half scan signal is rB.

11 in both steps (547) and (548)
If so, the book division copy mode is finished, so in step (549) the division signal is set to 10. In step (550), the second half scan signal is reset to 10. Reset to .

On the other hand, in the step/b (547), it is determined that the punk division signal is not "1." or in the step (547).
If it is determined in step 8) that the second half scan signal is not "1", it is determined in step (552) whether or not the home position signal is "1". This home position signal is set to 1° when the optical system (10) that has scanned in the direction of arrow <b> in FIG. 1 returns to its original home position and turns on the home position switch (503). If the normal position signal is 11'', the developing motor and transfer charger are turned off and a timer (TD) is set in step (553).

Subsequently, in step (554), the book division signal is set to "1".
If it is '1', copying of the first half of the original has been completed, so in step (555) the first half scan signal is reset to rO', and in step (556) the second half scan signal is reset to rl. ”. Furthermore, if this continues, the ADF (200) will replace the document under the control of (CPU 3), so in step <557) the optical system (10
) stops the signal indicating that one copy has been scanned, and executes step (55) to copy the second half of the original.
8), simulate the original position signal rl.

Set to .

Next, in step (559), when the judgment end timing of the timer (D) set in step (553) is confirmed, the main motor is turned off in step (560), and in step (561), the main motor is turned off. Output the results of the processing up to.

FIG. 8 shows the automatic paper selection routine executed in step (S4) of the main routine.

First, in step (570), the original size data detected and transmitted by (CPU 3) is input into the A register of (CPU 3), and in step (571), this data is converted according to the copy magnification and stored in the A register. . Next, in step 572, the first paper feed cassette (91) is loaded.
Compare the paper size fully loaded in the A register with the content stored in the A register, and if they are equal, step <573)
The size mismatch flag is reset to "0" in step (574), and the first paper feed cassette (91) is selected. If the sizes do not match in step (572), the paper size loaded in the second paper cassette (92) is compared with the content stored in the A register in step (575), and if they are equal, step (576) resets the size nonconformity flag to 10'', and in step (
577 to select the second paper feed cassette (92).

Also, if the sizes do not match in step (575), the size mismatch flag is set to 11 in step (578).
, and end this subroutine.

Figures 9a and 9b illustrate the automatic book division copy selection routine.

First, in step (580), the document size data from (CPU 3) is stored in the A register, and in step (5
81), the currently selected paper size is stored in the B register. Next, in step (582) it is determined whether the paper size data in the B register is for B5 landscape orientation, and in step (583) it is determined whether the document size data in the A register is for B5 landscape orientation. judge.

If both are YES, the copy magnification is set in step (584), and the magnification incompatibility flag is set to rO in step (585).
'', and in step (586), the book division copy flag is reset to ro. Said step (58
If NO in 3), it is determined in step (587) whether the document size data in the A register is A4 landscape orientation, and if YES, in step (588) the copy magnification is set to 0.
867, step (585), <58
Execute 6). Also, step (589), (59
In 3), the original size data in the A register is set to B4.
If it is determined that the document is in JL orientation or A3 portrait orientation, that is, the document should be copied in book divisions, the copy magnification is set to 1 or 0.86 in steps (590) and (594), respectively.
Set to 7. Then, in step (591'), the magnification nonconformity flag is reset to 10'', and in step (592')
), set the book division copy flag to "1".Also, in step (593), set the book division copy flag to "N".

If it is determined that the original size and the selected paper size are out of the copy magnification setting range, the magnification incompatibility flag is set to 11'' in step (595>), and the book is divided in step (596). copy flag to 10
”.

On the other hand, if the determination in step (582) is NO,
Step (580) determines whether the paper size data in the B register is for A4 landscape orientation, and step (580) determines whether the paper size data in the B register is for A4 landscape orientation.
98>, it is determined whether the document size code in the A register indicates A4 landscape orientation. If both are YES, set the copy magnification to 1 in step (599), and set the copy magnification to 1 in step (51).
00), the magnification mismatch flag is reset to ``0.'', and in step (Slot), the book division copy flag is reset to rOJ.If NO in the step (598), the W in the A register is reset in step (5102), It is determined whether the document size data is B5 landscape, and if YES, the copy magnification is set to 1.154 in step (5103), and the steps (5100) and (Slot) are executed. Step (5104), (5108)
If it is determined that the W and document size data in the A register are B5 portrait orientation or A3 portrait orientation, that is, it is determined that the document should be copied in separate sections, step 7B (5105>, <5109) and set the copy magnification to 1 or 11.
Set to 54. Then, in step (5106), the magnification incompatibility flag is reset to "0."
107) sets the book division copy flag to 11''. If the determination is NO in step (5108), as described above, the copy magnification setting range for the original size and the selected paper size is out of range, so in step (5110), the magnification incompatibility flag is set to 11. ", and in step (Sill) reset the book division copy flag to "0°.

If NO is determined in step 7 (597>), this subroutine (automatic book division copy selection) is ended, and the process moves to the automatic paper selection routine (see FIGS. 7a and 8) in step (B4). do.

FIG. 10 shows the book division copy selection routine executed in step (B5) of the main routine.

First, in step (5120), it is determined whether or not copying is in progress. If copying is in progress, this subroutine ends, but if not, in step 7 (5121), the key is pressed to select book division copy. It is determined whether or not (81) is on-edge, and if it is on-edge, step (5
In step 102), it is determined whether the book division copy selection display section (82) is on. If it is on, press the key (8
Since the second pressing operation in 1) is to cancel book division copying, the display section (82) is displayed in step (5123).
is turned off, and the book division copy flag is reset to "0." in step (5124).

Further, if it is determined in step (5122) that the display section (82) is off, this means that book division copying has just been selected, and therefore, in step (5125), the display section (82) is in the off state.
2) is turned on, and the book division copy flag is set to 11'' in step (5126).

FIG. 11 shows the paper selection routine that is executed in step (B6) of the main routine.

If it is determined in step (5130) that copying is not in progress, and it is determined in step (5131) that the paper selection key (77) is on-edge, the current first paper cassette (91) is selected in step (5132). If YES, the second paper feed cassette (92) is selected, and if NO, the first paper feed cassette (91) is selected.

Input the paper size code in steps (5133) and (5134>), respectively. Then, in step (5134), enter the paper size code.
At step 135), a paper size code conversion routine is executed, and at step (5136), one of the set paper size magnification display sections (80) is turned on.

FIG. 12 shows the paper size food conversion routine executed in step (5135).

First, in step (5140) it is determined whether the size code is rl. If the input size code is "rl", it is a B5 vertical orientation code, so the vapor lengths of 257 mm and 182 mm are stored in step (5141).

Below, steps (5142>, (5144), (5
146) and the size codes are 72", r3",
r4. If it is determined that they are A4 portrait orientation, B4 portrait orientation, and A3 portrait orientation, each step (5143)
Paper length 297nun, width 210mm, step (5145) vapor length 364mm, width 257mm
, in step (5147), the paper length of 420 man and width of 297 mm are memorized. Also, step (5148)
The size code is r54. r6. If it is determined that the paper is B5 horizontal and A4 horizontal, the paper length is 182 mm and the width is 128.5 m with steps < 5149, respectively.
m.

Step <5150), paper length 210mm, width 14
Memorize 8.5mm.

FIG. 13 shows the main routine of the control procedure (CPU 3) for controlling the ADF (200).

When the (CPLI3) is reset and the program starts, in step (5200), the random access memory (RAM) is cleared, various registers are initialized, and initial settings are made to put the device into the initial mode. 5201) starts an internal timer built in (CPU 3). The internal timer determines the time required for this main routine, and its value is set in advance in the initial setting at step (5200).

Next, steps (5202) and (5203) are called to subroutines in sequence, and when all the subroutine processing is completed, in step (5204), wait for the end of the internal timer that was set/started first, and then call the subroutines in order. The length of is used to count the various timers that appear in each subroutine. That is, in each subroutine, the end of the timer is determined based on how many times the various timers have counted this one routine.

In addition, data communication with the main (CPUI) is
This is performed in step (5205) of the interrupt routine, regardless of the main routine, in response to an interrupt request from the UI.

FIG. 14 shows the document control routine executed in step (5202).

In step (5210), whether or not the original is set on the original tray (203) is determined by the on/off state of the sensor (ES), and if it is on, the ADF from (CPUI) is sent in step (5211). It is determined whether the start signal is "rl". If YES, step (5212)
If No, step (5213>) determines whether the document feed flag is "IJ", and if it is '1', step (5214) sets the document feed flag to "0. Reset to .

Then, in step (5212), the conveyor belt motor is turned on, and the paper folding mode is turned on, and step (5212) is turned on.
5215), a document feeding processing routine is executed.

Next, in step (5216) it is determined whether scanning has been completed for the set number of copies, and if it has not been completed, in step (5217) the scanning end flag is set to 11.
” is determined. If it has finished, step (521)
In step 6a), the scan end flag is set to rl. At step (5217), the scan end flag is set to rl.

If it is determined that the scan end flag is "0." in step (5218),
In step 9), the document ejection processing routine is executed.

FIG. 15 shows the document feeding processing routine executed in step (5215).

First, in step (5220), the document size sensor (SS
If it is determined that E) is on-edge, step (5
221) sets the flag (K) to "1", and
Start timer (A1). This timer (A1)
is used to determine the timing for turning off the document feed motor, and sets the time until the document comes to the position where it receives the conveyance force from the conveyor belt (205).

This eliminates the problem of the document feeding motor continuing to be driven even after feeding the previous document and feeding the next document.

Next, if it is determined in step (5222) that the flag (K) is "rl", then in step (5223) the sensor (
SSE) is off-edge. If it is an off-edge, that is, when the sensor (SSE) detects that the trailing edge of the document has passed, a flag (K) is set in step (S224).
is reset to OJ, and the timer (A2) is started.The timer (A2) is set to the time until the rear edge of the document reaches the fixed position of the front edge of the document on the document platen glass (16).Then, step When the end of the timer (A1) is confirmed in step (5225), step (5226)
The document feed motor is turned off in step (5227), and when the end of the timer (A2) is confirmed in step (5227), step (52
28), turn off the conveyor belt motor, and step (522)
9), set the original position to 11'' and set the signal to (CP
UI).

FIG. 16 shows the document discharge processing routine executed in step (5219).

In step (5230), the document empty sensor (E) detects whether or not a document is set on the document tray (203).
The document tray (203)
If there is still another document above, step (5231)
Set the document feed flag to 11. If there is no document, the conveyor belt motor is rotated forward in step (5232), and a timer (B) is started in step (5233). This timer (B) is set to the time when the maximum size original is ejected onto the original table glass (16). Subsequently, when it is confirmed in step (5234) that the timer (B) has expired, the conveyance belt motor is turned off in step (5235), and this subroutine is ended.

FIG. 17 shows a document size detection routine that can be executed in step (5203) of the main routine.

First, in step (5240), the document size sensor (SS
If it is determined that E) is on-edge, then step <
5241) starts the timer (DU>. Then, in step (5242) the document size sensor (SSE)
If the off-edge can be detected, that is, the sensor (SSE)
When detects that the trailing edge of the document has passed, step (5243)
Stop the timer (DO) with step (5244).
), the value obtained by multiplying the value of the timer (DU>) by the document conveyance speed, that is, the length of the document, is stored in the A register.

In the following steps (5245) to (5255), the size of each document is determined based on the value stored in the A register. For example, if it is determined in step (5245) that the stored value of the A register is ≦182, it is determined that the document size is B5 landscape, and the other step (5245) is determined to be 182.
247), (249), (251), (243)
However, the same judgment is made.

FIG. 18 shows a procedure for controlling the scanning of the optical system (10) in (CPU 2).

When the on-edge of the scan signal is detected in step (5260), scanning of the optical system (10) is started in step (5261), and in this case and when the on-edge of the scan signal is not detected, book division is performed in step (5262). It is determined whether the signal is "rl".

If it is "1", it is determined in step (5263) whether or not the first half scan signal is 1, and if it is "1", it is determined in step (5263).
5264), it is determined whether the scanning of the first half page is completed. If it has been completed, the scanning operation of the optical system (10) is stopped in step (5265), the return signal is set to "rl", return is started, and the process moves to step (5266). Said step (526
If it is determined in 2) that the book division signal is not rl,
In step (5267), it is determined whether scanning of the range calculated from the paper length and copying magnification has been completed. If YES here, the step (5265) is executed, and if NO, the process moves to step (5266).

Further, if it is determined in step (5263) that the first half scan signal is not "1", then in step (5268) it is determined whether the second half scan has ended. Here Y
If ES, execute the step (5265) and NO.
If so, the process moves to step (5266).

In step (526B>, it is determined whether the book division signal is "1" or not. If it is "1.", in step (5269) it is determined whether the first half scan signal is "1." NO, YES at step (5269)
If so, processing is performed to output the first half copy in the book division copy mode and the timing signal in the normal copy mode. That is, in step (5270) the optical system (10)
The timing switch (504) installed in the scan path
) is turned on, and if it is turned on, the step (
5271) to set the timer (TF) and step (5271).
272), when the end of the timer (TF), that is, the end of the delay time depending on the copy magnification, is confirmed, step <527
In step 3), set the timing signal to 11'' and output it.

On the other hand, if it is determined in step (5269) that the first half scan signal is not rl, processing is performed to output a timing signal for the second half copy in the book division copy mode. That is, in step (5274) it is determined whether the optical system (10) has passed the end point of the first half scan;
If it passes, step (5275)-11' Tie?
(TG) is set, and when it is confirmed in step (5276) that the timer (TG) has ended, that is, the end of the delay time depending on the copy magnification, the timing signal is set to "rl" and outputted in step (5277). Note that the operating time of both the timers (TF) and (TG) can be changed depending on the copying magnification.

Next, the home position switch (503) is turned on when the optical system (10) returns to the home position at step 7 (5278).
) is on-edge. If the timing is on-edge, the optical system (
10) Complete the return, reset the return signal to ``0°, and set the home position signal to ``1.''
and reset the timing signal to 10''.

If the home position switch (503) is not on, the home position signal is reset to "0" in step (5280), and this subroutine ends.

In addition, data communication with the main (CPUI) is
This is performed in step (5281) of the interrupt routine, regardless of the main routine, in response to an interrupt request from the UI.

According to the above control procedure, if the document size sensor (SSE) detects a size other than the specific size corresponding to the copy paper during copying using the ADF (200) and book division copying is performed, the copy is When a document that can be of a specific size corresponding to paper is detected, that is, when the selected paper size is B5 landscape, the step (58
9), (593), the original size is B4Jl, Aa
If it is determined that the paper is placed in i-place, or if the selected paper size is A4 landscape, the above step (
5104), (5108), when it is determined that the original size is A3 portrait orientation or B4 portrait orientation, as long as the book division copying mode is selected, control is automatically performed to perform book/book division copying. Ru. Therefore, the ADF (
200) and can be placed on the original tray (203) of the document tray (200), and copy processing can be performed continuously.

In addition, as in this embodiment, if a copy mode that automatically selects the copy magnification that allows 100% copying for the selected copy paper according to the original size is used, the originals that should be divided into books can be automatically copied. Since copies are generally made in book division copying mode, it is possible to continuously copy documents of various sizes in a unified size with a single print start operation.

[Ike's Embodiment] Although only one-sided copying has been described in this embodiment, the present invention can also be applied to a copying machine capable of double-sided copying. Also, regarding W and document size detection means, the operation of ADF<200> is not linked.
A detection sensor may be arranged on the document table glass (16).

Effects of the Invention As is clear from the above description, according to the present invention, during copying using the automatic document feeder, if book division copying is performed on a size other than the specific size corresponding to copy paper, A document that can be of a specific size corresponding to the copy paper is
Equipped with a control means that automatically performs book division copying when the original size is detected by the original size detection means, so when the original is detected without book division copying, book division copying is automatically performed, and the print start operation is performed once. It is possible to make continuous copies of documents of different sizes.

[Brief explanation of drawings]

The drawings show an embodiment of a copying machine according to the present invention, FIG. 1 is an overall configuration diagram of the copying machine, FIG. 2 is a plan view of an operation panel, FIGS. 3 and 4 are block diagrams of a control circuit, FIG. 5 is an explanatory diagram of book division copying, and FIGS. 6 to 18 are flowcharts showing control procedures. (1>... Photosensitive drum, (10>... Optical system, (
20)... Automatic paper feeding mechanism, (81)... Book division copy key, (82)... Book division copy display section, (1
00)...Copying machine main body, (200)...Automatic document feeder (ADF), (203)...Document tray, (
CPUI), (CPtJ2), (CPU3>...
・Microcomputer, (SSE)...Document size sensor.

Claims (1)

[Claims] 1. In a copying machine equipped with at least an automatic document feeder, document size detection means, and book division copying function, during copying using the automatic document feeder, a specific size corresponding to copy paper The present invention further comprises a control means for automatically performing book division copying when the original size detection means detects a document having a size other than 200, which can be of a specific size corresponding to the copy paper if book division copying is performed. A copying machine featuring: