JP3497682B2 - Image forming device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a facsimile or a scanner, and more particularly to an image forming apparatus equipped with a sheet-through type automatic document feeder.

[0002]

2. Description of the Related Art Conventionally, an image forming apparatus has been provided with an automatic document feeder (hereinafter referred to as ADF) for copying a plurality of sheets and a plurality of copies of an original in a short time. The ADF automatically feeds the set originals one by one onto the exposed surface. The image of the original document on the exposed surface is read by moving the carriage, which is integrated with an exposure lamp and a lens, and scanning the original document. Therefore, when an image is formed using this ADF, there is a problem in that the structure of these engineering scanning exposure systems becomes complicated, an increase in cost is unavoidable, and it is difficult to downsize the image forming apparatus.

Therefore, recently, a sheet-through type automatic document feeder has been proposed as an automatic document feeder. In this sheet-through type automatic document feeder, an exposure engineering system such as an exposure lamp is fixed at a fixed exposure position formed on a slit, and a scanning exposure operation is performed without conveying the document at a constant moving speed. This is an automatic document feeder using a so-called document moving method.

Further, as the above-mentioned sheet-through type automatic document feeder, an automatic document feeder (hereinafter referred to as ARDF) capable of outputting a double-sided image of a document onto a transfer sheet.
Say ) As "Document feeder"
It is disclosed in Japanese Patent Publication No. 59. This "Document Feeder"
Includes an original feed tray for setting originals to be fed, and an original discharge tray on which the discharged originals are placed. The reverse paths of the original reversing device are provided on both trays, and the originals after being reversed Is again provided to the exposure position. Therefore, even when performing double-sided copying of a document, it is possible to reduce the size of the automatic document feeder by providing a reversing path for reversing the document above the exposure position.

[0005]

However, in the ARDF such as the above-mentioned "document feeding device", an operation mode making use of the function is not proposed, and it is provided in a sheet-through type single-sided document feeding device. In order to execute the copy mode such as the repeat copy in which the image on the same side of the original is repeatedly output to the transfer paper and the split copy in which the left part and the right part of the original are separately output to the transfer paper,
A memory for storing the read image data must be used, and there is a problem that the cost increase for this memory cannot be avoided.

The present invention has been made in view of the above circumstances.
An object of the present invention is to provide an image forming apparatus provided with an ARDF that executes a repeat copy mode and a spread split copy mode without using a memory, and further has a copy mode that utilizes the ARDF function.

[0007]

The invention according to claim 1 is
An original placing table on which the original stack is placed, a delivery original table on which the discharged originals are placed, an original reversing stand on which the placed originals are inverted and ejected, and the originals in the original bundle. An automatic document feeder including an image on the front side and an exposure engineering unit fixed at an exposure position on a platen for reading the image on the surface of the inverted document, and settings for setting the operation of the image forming apparatus In the image forming apparatus having a means, a repeat mode is set in which the image of one side of the document is repeatedly read by the setting means, and the read image is output to a plurality of transfer sheets, and the number of the transfer sheets is set. Is set, the image of the original is read by the exposure engineering means, the read image is output to a transfer sheet, the original is placed on the original reversing table, and the original is placed on the original reversing table. Manuscript passing through the exposure engineering means By placing the document on the document reversing table as one cycle, the document is circulated in this cycle the same number of times as the set number of transfer sheets, so that the image on one side of the document is repeated a set number of times. It is characterized by reading and outputting the image on a plurality of transfer sheets.

According to a second aspect of the present invention, an original placing table on which a stack of originals is placed, a delivery original placing table on which the discharged originals are placed,
An original reversing table that reverses the placed original and ejects it,
An automatic document feeder including an image on the surface of the document in the document stack and an exposure engineering unit fixed at an exposure position on a platen for reading the image on the surface of the inverted document, and image formation An image forming apparatus having setting means for setting the operation of the apparatus, wherein the setting means sets the document
When the spread original copy mode is set, in which the image on one side is divided into two and read, and the two read images are output to different transfer papers respectively, when the spread original division copy mode is set, Reading one divided image, outputting the first divided image to a first transfer sheet, placing the original document on the original reversing table, and reading the original document placed on the original reversing table. Passing through the exposure engineering means, placing the original on the original reversing table, second side of one side of the original placed on the original reversing table
Reading the divided image by the exposure engineering means and outputting the second divided image to the second transfer paper, the image on one side of the original is divided and read,
It is characterized in that the read images are output on different transfer papers.

According to a third aspect of the invention, in the second aspect of the invention, the document is divided into a left half and a right half.

According to a fourth aspect of the present invention, an original placing table on which a bundle of originals is placed, a delivery original placing table on which the discharged originals are placed,
An original reversing table that reverses the placed original and ejects it,
An automatic document feeder including an image on the surface of the document in the document stack and an exposure engineering unit fixed at an exposure position on a platen for reading the image on the surface of the inverted document, and image formation An image forming apparatus having setting means for setting the operation of the apparatus, wherein the setting means reads the images on the front and back sides of the original and outputs the read images on a set number of different transfer sheets. When the division copy mode is set and the number of transfer sheets for outputting the read image is set, the image on the surface of the original is read by the exposure engineering means, and the original is placed on the original reverse table. The number of originals is the same as the set number of transfer sheets, with one cycle including setting, passage of the originals placed on the original inversion table through the exposure engineering means, and placing of the originals on the original inversion table. By repeating this cycle in several cycles, the image on the front side of the document is repeatedly read a set number of times, the image is output to a plurality of transfer sheets, and the image on the back side of the document is read by the exposure engineering means. The original is set as one cycle by placing the original on the original inverting table, passing the original placed on the original inverting table through the exposure engineering means, and placing the original on the original inverting table as one cycle. By circulating this image in the same number of times as the number of transfer sheets, the image on the back side of the document is repeatedly read a set number of times, and the image is output on a plurality of transfer sheets, so that the images on the front and back sides of the document are output. Read
It is characterized in that the read image is output to a set number of different transfer sheets.

According to a fifth aspect of the invention, in the invention of the fourth aspect, the setting of the number of transfer sheets for outputting the image read by the setting means is set to the number of transfer sheets for outputting the image on the front surface of the original. The number of transfer sheets for outputting the image on the back side of the document is set independently.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an image forming apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the structure of an ARDF included in the image forming apparatus according to the present invention. In this ARDF, a document feed tray 120 and a document discharge tray 123 are arranged in two stages above and below a platen 124, and a reversing tray 121 is provided to provide a reversing path for reversing a document. And the document discharge tray 123. The document feed tray 120 is provided with a document set sensor 193 that detects a document set, a bottom plate solenoid 192 that moves a document to a paper feed port, and a paper feed clutch 134 that drives a paper feed belt. The document set sensor 193 is a transmissive sensor, and detects the document with the filler pushed up by the document.

The reversing switching solenoid 130 selects whether the document conveyed from the document reading position 132 is conveyed to the reversing tray 121 or discharged to the document discharge tray 123. The inversion switching solenoid 130 is operated by a solenoid. Further, three sensors are provided to control the conveyance of the document, and the registration sensor 101 and the registration sensor 101, respectively.
The paper discharge sensor 102 and the reverse tray sensor 103. These three sensors are reflective sensors with filters.
Each of the rollers is driven by two stepping motors, and the conveyor belt 110, the separation roller 111, and the reversing roller 115 are a reversing paper feeding motor (normal rotation and reverse rotation),
The pull-out roller 112, the auxiliary roller 113, and the paper discharge roller 114 are driven by a conveyance motor (only in one direction). The reversing roller 115 is provided with a torque limiter so as to deal with the case where the document moves against the rotation direction.

As described above, the ARDF has two motors, that is, a reverse paper feeding motor and a carry motor. A periodic data transfer circuit for controlling the motor is shown in FIG. 2, and a control circuit for these two motors is shown in FIG.

The periodic data transfer circuit for controlling the motor shown in FIG. 2 is used for transferring the periodic data to the output compare register B205, which is a DMA (Direct Memory).
Access) COB 201, DMACOA 204 used to transfer the output pattern to TPC (Programmable Timing Pattern Controller) 202, output compare register B 205, and comparator B 206.
, 16-bit counter 207, and clock generator 20
8, a RAM 220 having a cycle data table, and a ROM 221 having an output pattern.

DMACOB 201 and DMACOA 204
In both cases, the transfer of the periodic data by the DMACOB 201 to the output compare register B205 is a trigger to transfer the next data.

In this embodiment, a stepping motor is used as a drive motor. Therefore, the RAM 220
In the periodic motor table stored in the table, in addition to the constant speed section in which the motor is driven at the target speed to stabilize the rotation of the motor when driving the stepping motor, the motor gradually increases until the target speed is reached. A slew-up section for increasing the speed and a slew-down section for gradually decreasing the motor speed when the motor is stopped are provided.

The clock generator 208 is this hardware reference clock generation circuit, and a clock generator for generating an operation clock of the CPU may be used. Also, ROM
An output pattern for driving the motor is stored in 221.

The output compare register B205 has a time (counter) at which a pattern is next output to the motor.
Is memorized. The reference clock output from the clock generator 208 is input to the 16-bit counter 207 and 1
It is incremented every clock. When both the count values are compared by the comparator B206 and a compare match occurs, that is, when the count values become the same value,
The comparator B outputs a combe match B (TIOCBO).

The TPC 202 comprises a next data register (NDR) and a port data register.
When the compare match B is input to the next data register, immediately after the contents already stored in this register are transferred to the port data register, the next output pattern is output by the DMA controller (DMACOA) 204 to the next output pattern. Is memorized. In this way, the output pattern is directly written to the port register, and the I / O
The reason why the signals are not output to the port 203 is that the signals a to d can be simultaneously output by a certain trigger (here, TICOBC) even when they are not assigned in the 1-byte register. The signals a to d in the drawing are respectively a motor clock, a rotation direction, a phase excitation, and an ON / OFF signal, which will be described later, and are input to the drive circuit 210 of the carry motor 211 and the reversal paper feed motor 212.

The control circuit for the two motors shown in FIG. 3 includes an I / O port 203 connected to the phase excitation and ON / OFF output ports, and two drive circuits 210 synchronized with the same clock. , A conveyance motor 211 connected to the drive circuit 210, and a reversal sheet feeding motor 212.

The I / O port 203 is an output port that can be directly controlled by the CPU. The CPU changes this output value according to the operation of the two-phase excitation or the one-two-phase excitation of the carry motor. Also, the transport motor 211 is stopped and the operation is ON.
It is controlled using the output port of / OFF.

Therefore, the two motors of the reverse paper feed motor 212 and the carry motor 211 provided in the ARDF are
DMACO as a clock pulse drive type driver
Equipped with B201, motor ON / OFF, rotation direction,
Phase excitation is set, driving is performed at both rising and falling edges of the clock, and the two motors are operating with one common clock.

As the reverse feeding motor 212 rotates,
The roller rotates in the CW and CCW directions shown in FIG. The rotation direction of the motor can be selected by a Hi / Low signal. Regarding the carry motor 211, there is only one direction CW. Further, since the two-layer stepping motor is used in this embodiment, the type of phase excitation (two-phase excitation or 1
-2 phase excitation) is switched according to the driving speed of the motor. The rollers or belts driven by the reversing paper feeding motor 212 are the paper feeding belt 110, the separating roller 111, and the reversing roller 115.
The rollers driven by are the pull-out roller 112, the auxiliary roller 113, and the paper discharge roller 114.

FIG. 4 is a diagram showing the structure of an embodiment of the image forming apparatus according to the present invention. This image forming apparatus includes an automatic document feeder including a document table 230 and a reversing tray 231, an original feeding device 234 including an ARDF drive motor 232, and an image reading device 235 including a scanner drive motor 233. , Paper discharge unit 23 for discharging transfer paper
6, a polygon motor and a mirror 237 that reflect the laser from the laser diode 238, a laser diode 238 that emits the laser, a photosensitive drum 239 that forms an electrostatic latent image corresponding to the image of the original, and a registration roller 240. A manual door 241 that opens when the transfer paper is manually fed, a fixing unit 242 for fixing the toner on the transfer paper to the transfer paper, and a first paper feed cassette 24.
4 and the second paper feed cassette 245, the paper feed rollers 243 that feed the transfer paper, the first paper feed cassette 244 and the second paper feed cassette 245 that store the transfer paper, and the paper feed roller 243. A transport roller 246 that transports the transfer paper fed by 243, a paper discharge cover 247 that opens when the discharged transfer paper is directly discharged, a paper discharge cover 247, or the internal paper discharge unit 2
36, an image forming unit 250 including a switching unit 248 for switching the discharge of the transfer sheet to one of the two, and a transport roller 249 for transporting the transfer sheet to the internal discharge unit 236, and various operations of the image forming apparatus are set. And an operation unit 251 for operating.

An example of the operation unit 251 is shown in FIG. The operation unit 251 has a liquid crystal display 261 for displaying a message such as "Ready to copy", and this liquid crystal display has a touch panel structure. A double-sided key 262 for selecting a double-sided mode and a double-page spread for selecting a double-page spread mode. A mode key 263 is provided, and these modes can be selected by touching the screen with a finger or the like.
The selection key 264 is used to select various modes. The hi-fi key 265 is used to change the mode to hi-fi. The division mode can be set by pressing the division mode key 266 when performing division in various modes. Also, the numeric keypad 26
7 is used to set a numerical value and the like.

FIG. 6 shows a hardware configuration example of the image forming apparatus according to the present invention. This hardware is a copy application 271 including a CPU 272 for controlling the operation of the image forming apparatus inside.
Includes an operation unit 251, a memory unit 276 having an image memory 275 for storing image data therein,
The image forming unit 250, the image reading device 235, and the RAM 2
78, a ROM 279, a CPU 280, and a document feeder 283 are connected to each other via a CPU bus 277, a system controller 282, a control signal line 273 for transmitting a control signal, and an image for transmitting an image forming signal. The formation signal bus 274 and the operation unit control bus 281 are connected.

FIG. 7 shows the software configuration of a digital copy of the image forming apparatus according to the present invention. In this configuration, the copy application 27 is added to the application layer 292.
1 and the other application 290 are incorporated, and the system control layer 293 includes the system controller 28.
2, an operation unit controller 300 for operating the operation unit 251, a memory unit controller 301 for operating the memory unit, an image forming unit controller 302 for operating the image forming unit, and an image for operating the image reading device. A reading device controller 303 and a document feeding device controller 304 for operating the document feeding device are incorporated, and an input / output control 291 is incorporated in the device control layer 294. Further, each application of the application layer 292 is connected to the system controller 282 of the system control layer 293, and each controller of the system control layer 293 is connected to the input / output control 291 of the device control layer 294.

Therefore, in the case of the digital copying machine, various applications other than the copy application 271 can be installed by configuring a multitasking type system. The copy application 271 controls image formation. To configure a multitasking system,
It is necessary to handle the function unit as a resource and manage the resource so that one application is shared by a plurality of applications. This management is performed by the system control layer 293 shown in FIG. In this system control layer 293, the system controller 282 is responsible for all input / output of each controller and each application.

Further, the device control layer 294 is a conversion for driving and inputting mechanical input / output of a clutch, a sensor, a motor or the like for actually moving the device from a logical instruction such as a command control signal from the system control layer 293. Are doing. A signal is output from the document feeding controller 304 as a trigger for reading an image by the image reading device 235. The length of the image to be read can be adjusted by this signal.

Next, the basic operation of the ARDF included in the image forming apparatus according to the present invention will be described with reference to FIGS. 1 and 8 to 13. Here, the circled numbers shown in FIG. 8 to FIG. 13 indicate the moving order of the original document, and the letter E indicates that the moving of the original document temporarily stops there.

FIG. 8 is a diagram showing a sheet feeding operation for front side reading. The original set on the original feeding tray 120 is picked up by the conveying belt 110 and the separating roller 111, separated into one sheet, and conveyed inside the ARDF. After that, it is conveyed by the pull-out roller 112, and stops after the registration sensor 101 detects the leading edge of the document. At this time, the rotation direction of the reverse paper feed motor shown in FIG. 1 is CW.

FIG. 9 is a diagram showing a sheet feeding operation for reading the back side. The original set on the original feeding tray 120 is picked up by the conveying belt 110 and the separating roller 111, separated into one sheet, and conveyed inside the ARDF. After that, the sheet is conveyed by the pull-out roller 112 and the sheet ejection roller 114, and the sheet ejection sensor 10
2 detects the leading edge of the document, and then reverses switching solenoid 130
Is turned on, the conveyance bus is opened to the reversing tray 121, and after the paper ejection sensor 102 detects the trailing edge of the original, the paper is conveyed to the switchback point 131 and then stopped. At this time, the rotation direction of the reverse paper feed motor shown in FIG. 1 is CW.

After the document stops at the switchback point 131, the rotation direction of the reverse feeding motor is changed to CCW,
Rotate each roller in the opposite direction. During that time, the reversal switching solenoid 130 is turned off, the transport bus is switched to the re-feed bus 133, and the transport is carried to the position of the registration sensor 101. At this time, the rotation direction of the reverse feeding motor shown in FIG. 1 is CCW.

FIG. 10 is a diagram showing an operation of reversing and feeding a document at the registration position. The original stopped at the position of the registration sensor 101 is conveyed toward the original reading position 132,
After the paper ejection sensor detects the leading edge of the document, the reversal switching solenoid 130 is turned on, the transport bus is opened to the reversing tray 121, and after the paper ejection sensor 102 detects the trailing edge of the document, it is transported to the switchback point 131 and stopped. To do. At this time, the rotation direction of the reverse paper feed motor shown in FIG. 1 is CW.

After the original has stopped at the switchback point 131, the rotation direction of the reverse feeding motor is changed to CCW and the reverse rotation is performed. Meanwhile, the reversal switching solenoid 13
0 is turned off, the transport bus is switched to the re-feed bus 133, and the paper is transported to the position of the registration sensor 101. At this time, the rotation direction of the reverse feeding motor shown in FIG. 1 is CCW.

FIG. 11 is a diagram showing the operation of feeding the document from which the image has been read to the registration position again. A document stopped at the position of the registration sensor 101 is read at the document reading position 13
After being conveyed in two directions, exposure is performed at the document reading position 132, the discharge sensor 102 detects the leading edge of the document, the reversing switching solenoid 130 is turned on, the transport bus is opened to the reversing tray 121, and the trailing end of the document is discharged. After the sensor 102 detects, it conveys to the switchback point 131 and stops. At this time, the rotation direction of the reverse paper feed motor shown in FIG. 1 is CW.

After the document stops at the switchback point 131, the rotation direction of the reversing paper feeding motor is changed to CCW and the document is rotated in the opposite direction. Meanwhile, the reversal switching solenoid 13
0 is turned off, the transport bus is switched to the re-feed bus 133, and the paper is transported to the position of the registration sensor 101. At this time, the rotation direction of the reverse feeding motor shown in FIG. 1 is CCW.

FIG. 12 is a diagram showing the operation of discharging the original after reading the image. The document stopped at the registration sensor 101 position is conveyed toward the document reading position 132, exposed at the document reading position 132, the reversal switching solenoid 130 is turned off, and the conveyance bus is opened to the document discharge tray 123 and discharged. The paper is conveyed to the paper slot and stopped. At this time, the rotation direction of the reverse paper feed motor shown in FIG. 1 is CW.

FIG. 13 is a diagram showing an operation of discharging a document from the registration position. The document stopped at the position of the registration sensor 101 is conveyed toward the document reading position 132, the reversal switching solenoid 130 is turned off, the conveyance bus is opened to the document discharge tray 123, conveyed to the discharge port, and stopped. At this time, the rotation direction of the reverse paper feed motor shown in FIG. 1 is CW.

FIG. 14 shows, as an example of a basic conveyance timing chart for both sides, a series of operations for reading both originals, that is,
In a series of operations of sheet feeding, front surface reading, reverse, reverse surface reading, reverse sheet discharging, and next original document feeding, a reverse feeding motor, a conveyance motor, a feeding clutch 134, a bottom plate solenoid 192, a document set sensor 193, a registration sensor 101. A timing chart of the paper discharge sensor 102, the reversal tray sensor 103, and the reversal switching solenoid 130 is shown. The effective range of image reading is controlled by the FGATE signal 180. Here, the interval A is 200 msec, the interval B is 35 mm, the interval C is 42 mm, and the interval D is 3.
It is 5 mm.

Further, in addition to the above-mentioned basic operation, the following first to fourth additional operations are necessary as operations actually required.

As the first additional operation, a butting operation is necessary. When the original stops at the switchback point 131 and is re-fed to the position of the registration sensor 101, this abutting operation is performed from the switchback point 131 to the discharge roller 114 in order to correct the skew during the conveyance of the original. Reverse feed motor 2
In this operation, 12 is turned off, only the conveyance motor 211 is turned on, the original is pushed against the paper discharge roller 114 and is conveyed until the original is bent, and skew is corrected.

As a second additional operation, the next original feeding operation is required when there is paper in the paper feeding tray. This next original feeding operation is an operation when an original is conveyed from the paper feed tray 120. When there is a next original, the paper feed belt 1 is so arranged that the next original is conveyed to the position of the registration sensor 101.
10 is conveyed with the clutch 134 kept ON.

As a third additional operation, the next original feeding when the original is on the reverse tray 121 is the reverse tray sensor 1.
It is necessary to turn on the clutch 134 of the sheet feeding belt 110 and convey the next original document to the position of the registration sensor 101 so that the originals do not overlap each other after 03 is turned off.

As a fourth additional operation, in order to adjust the page order in the paper discharge after the operation is interrupted, the above basic operations are combined and the paper is discharged face-down to the document discharge tray 123.

Next, the first operation of the ARDF included in the image forming apparatus according to the present invention will be described with reference to the flowchart of FIG. 15 and FIGS. The first operation is an operation for setting a document on a document table and obtaining a large number of copy transfer sheets for one document. First, in step S1, the copy application 271 requests the system controller 282 for a copy operation. This request causes ARDF to enter repeat copy mode. In step S3, the ARDF feeds paper for copying the front side of the document. In step S5, the image memory 2
The image is output to the transfer paper without using the 75. Step S
At 7, the original is inverted to read the front side again. Next, in step S9, it is confirmed whether or not the number-of-values copy has been performed. If the number-of-values copy has not been performed (No), the process proceeds to step S5, and if the number-of-values copy has been performed ( Yes), and proceeds to step S11. That is, the operations of steps S5 and S7 are repeated for the number of sheets. After repeating the number of values,
In step S11, the paper is discharged and the operation is completed.

FIG. 16 shows a timing chart for the above-mentioned first operation. Here, the interval A is 200 msec,
Interval B is 35 mm, Interval C is 42 mm, Interval D is 30 m
m.

According to the first operation, when the repeat copy is performed using the ARDF, the repeat copy can be performed without using the image memory. Therefore, it is possible to reduce the cost of the image forming apparatus corresponding to the image memory, output the image data from the image memory,
It is possible to avoid the deterioration of copy quality when an image corresponding to this data is formed on a transfer sheet.

Next, the second operation of the ARDF included in the image forming apparatus according to the present invention will be described with reference to the flowchart of FIG. 17 and FIGS. The second operation is an operation in the case of performing spread spread copying which is a copy mode in which the document is set on the document table and the left part and the right part of the document are separately output to the transfer paper. First, step S
At 21, the user selects the spread spread copy.
In step S23, the copy application 271 requests the system controller 282 for a spread spread copy operation. This request causes ARDF to enter the spread split copy mode. In step S25, the ARDF performs paper feeding for copying the front side of the document. Next, in step S27, the left half of the document is read and re-fed, and the image of the left half is output onto the transfer sheet, and then the process proceeds to step S29. In step S29, an inversion operation for reading the right side of the document is performed. In step S31, the right half of the original is read and re-fed, and the image in the right half is output on the transfer sheet, and then the process proceeds to step S33. Step S
In step 33, the document is inverted and then step S35.
The paper is discharged with and the operation is completed.

FIG. 18 shows a timing chart for the above-mentioned second operation. Here, the interval A is 200 msec,
Interval B is 42 mm, Interval C is 35 mm, Interval D is 30 m
m.

According to the second operation, when the spread spread copy is performed using ARDF, the spread spread copy can be performed without using the image memory. Therefore, it has the same effect as the case of the first operation.

Next, the third operation of the ARDF provided in the image forming apparatus according to the present invention will be described with reference to the flowchart of FIG. 19 and FIGS. The third operation is a double-sided original division copy operation in which the original is set on the original table and both sides of the original are divided and copied. First, in step S41, the user selects the spread spread copy. In step S43, the copy application 271 requests the system controller 282 for a spread spread copy operation. This request causes ARDF to enter the spread split copy mode. However, the image memory 275 is not used in this double-sided document division copy operation. In step S45, the ARDF feeds the front side to form an image on the front side of the document. Next, in step S47, reading and re-feeding for reading the front surface of the document is performed, and the image on the front surface is output to the transfer paper. In step S49, it is confirmed whether or not the number of copies has been copied, and if not copied (No), the process proceeds to step S59,
After the document reversing operation is performed in step S59, the process proceeds to step S47. In the confirmation in step S49, if the number of copies is equal to the value (Yes), step S49
Move to 51. In step S51, reading and re-feeding for reading the front side of the document is performed, and the image on the back side is output to the transfer sheet. In step S53,
It is confirmed whether or not the number of sheets has been copied, and if not copied (No), the process proceeds to step S61, and in step S61, the document reversing operation is performed, and then step S61.
Move to 51. In the confirmation in step S53, if the number of copies is equal to the value (Yes), the process proceeds to step S55. After the document reversing operation is performed in step S55, the process proceeds to step S57, and in step S57, the sheet is discharged, and then the operation ends.

FIG. 20 shows a timing chart for the above-mentioned third operation. Here, the interval A is 200 msec,
Interval B is 35 mm, Interval C is 42 mm, Interval D is 30 m
m.

According to the third operation, when performing the double-sided split spread division copy using the ARDF, the double-sided spread spread copy can be performed without using the image memory. Therefore, the same effect as in the case of the first operation is obtained.

FIG. 21 is a diagram showing a detailed structure of the ARDF shown in FIG. In this figure, when reading only the image on one side of the original, the original is (READ),
It is transported in the order of A. However, (READ) represents reading of a document image. When reading images on both sides of the original, the original is, (READ), B of ,,
,, (READ), B ,,,, (P
ASS), and A are conveyed in this order. However, (P
ASS) indicates that the image of the original is not read and is passed.

[0058]

As is apparent from the above description, according to the present invention, a repeat copy mode and a spread split copy mode are executed without using a memory, and a double-sided split copy mode that makes the best use of the ARDF function is provided. ARDF to have
It is possible to provide an image forming apparatus provided with.

[Brief description of drawings]

FIG. 1 is a diagram showing a structure of an ARDF included in an image forming apparatus according to the present invention.

FIG. 2 is a cyclic data transfer circuit for controlling a motor included in the ARDF according to the present invention.

FIG. 3 is a control circuit for controlling a motor included in the ARDF according to the present invention.

FIG. 4 is a diagram showing a structure of an image forming apparatus according to the present invention.

FIG. 5 is an external view of an operation unit included in the image forming apparatus according to the present invention.

FIG. 6 is a diagram showing a hardware configuration of an image forming apparatus according to the present invention.

FIG. 7 is a diagram showing a software configuration in digital copying of the image forming apparatus according to the present invention.

FIG. 8 is a diagram showing a sheet feeding operation for front surface reading of an ARDF included in the image forming apparatus according to the present invention.

FIG. 9 is a diagram showing a sheet feeding operation for reading the back side of the ARDF included in the image forming apparatus according to the present invention.

FIG. 10 is an ARDF included in the image forming apparatus according to the present invention.
FIG. 6 is a diagram showing an operation of reversing and feeding the original document at the registration position of FIG.

FIG. 11 is an ARDF included in the image forming apparatus according to the present invention.
FIG. 6 is a diagram showing an operation of feeding the original from which the image is read to the registration position again.

FIG. 12 is an ARDF included in the image forming apparatus according to the present invention.
FIG. 7 is a diagram showing an operation of discharging a document after reading the image of FIG.

FIG. 13 is an ARDF included in the image forming apparatus according to the present invention.
FIG. 7 is a diagram showing an operation of ejecting the original document from the registration position.

FIG. 14 is a basic conveyance timing chart when the image forming apparatus according to the present invention forms images on both sides.

FIG. 15 is a flowchart showing a first operation of the image forming apparatus according to the present invention.

FIG. 16 is a timing chart in the first operation of the image forming apparatus according to the present invention.

FIG. 17 is a flowchart showing a second operation of the image forming apparatus according to the present invention.

FIG. 18 is a timing chart in the second operation of the image forming apparatus according to the present invention.

FIG. 19 is a flowchart showing a third operation of the image forming apparatus according to the present invention.

FIG. 20 is a timing chart in the third operation of the image forming apparatus according to the present invention.

FIG. 21 is an ARDF included in the image forming apparatus according to the present invention.
It is a figure which shows the detailed structure of.

[Explanation of symbols]

101 Registration sensor 102 Paper ejection sensor 103 Reverse tray sensor 113 Auxiliary roller 114 paper ejection roller 115 Reversing roller 120 document feed tray 121 Reverse tray 123 Document output tray 130 Reverse switching solenoid 131 Switchback Point 132 Original reading position 133 Refeed Bus 134 Paper feed clutch 201 DMACOB 202 TPC 211 Conveyor motor 212 Reverse feed motor 230 Document Plate 231 Inversion tray 232 ARDF drive motor 233 Scanner drive motor 234 Document feeder 235 image reader 251 Operation part 261 LCD display 262 double-sided mode key 263 Spread mode key 275 image memory 276 memory unit 282 system controller 283 Document feeder 292 Application layer 293 System control layer 294 Device control layer

Claims (5)

(57) [Claims] 1. A document placing table on which a stack of documents is placed, a discharge document table on which discharged documents are placed, a document reversing table from which the placed documents are reversed and discharged, and the document. An automatic document feeder including an image on the surface of the originals in the bundle and an exposure engineering unit fixed at an exposure position on a platen for reading the image on the surface of the inverted originals; An image forming apparatus having setting means for setting an operation, wherein a repeat mode for repeatedly reading an image on one side of a document by the setting means and outputting the read image to a plurality of transfer sheets is set, and When the number of the transfer papers is set, the image of the original is read by the exposure engineering means, the read image is output to the transfer paper, the original is placed on the original reverse table, the original reverse table The dew of the original placed on the By passing the engineering means and placing the original on the original reversing table as one cycle, the original is circulated in this cycle the same number of times as the set number of transfer sheets to set an image on one side of the original. An image forming apparatus characterized in that the image is repeatedly read a predetermined number of times and the image is output on a plurality of transfer sheets. 2. An original placing table on which a stack of originals is placed, a delivery original placing table on which ejected originals are placed, an original reversing stand on which the placed originals are inverted and ejected, and the originals. An automatic document feeder including an image on the surface of the originals in the bundle and an exposure engineering unit fixed at an exposure position on a platen for reading the image on the surface of the inverted originals; An image forming apparatus having setting means for setting an operation, wherein the setting means divides an image on one side of the original into two and reads them, and outputs the read two images on different transfer papers. When the division copy mode is set, the exposure engineering means reads the first divided image on one side of the original, outputs the first divided image to the first transfer paper, and outputs the original. Placement on the original reversing table, reversing the original The original placed on the document passing through the exposure engineering means, placing the original on the original reversing table, and exposing the second divided image on one side of the original placed on the original reversing table. By reading and outputting the second divided image to the second transfer sheet, the image on one side of the original is divided and read, and the read images are output to different transfer sheets. An image forming apparatus comprising: 3. The image forming apparatus according to claim 2, wherein the document is divided into a left half and a right half. 4. An original placing table on which a stack of originals is placed, a delivery original placing table on which ejected originals are placed, an original reversing stand on which the placed originals are inverted and ejected, and the originals. An automatic document feeder including an image on the surface of the originals in the bundle and an exposure engineering unit fixed at an exposure position on a platen for reading the image on the surface of the inverted originals; An image forming apparatus having setting means for setting an operation, wherein the setting means reads the images on the front surface and the back surface of the original and outputs the read images to a set number of different transfer papers. When the mode is set and the number of transfer sheets for outputting the read image is set, the image reading on the front surface of the document by the exposure engineering means,
The original is set as one cycle by placing the original on the original inverting table, passing the original placed on the original inverting table through the exposure engineering means, and placing the original on the original inverting table as one cycle. By repeating this cycle for the same number of times as the number of transfer sheets, the image on the surface of the original is repeatedly read a set number of times, the image is output to a plurality of transfer sheets, and Read the image on the back side,
The original is set as one cycle by placing the original on the original inverting table, passing the original placed on the original inverting table through the exposure engineering means, and placing the original on the original inverting table as one cycle. By repeating the same number of times as the number of transfer sheets in this cycle, the image on the back side of the document is repeatedly read a set number of times, and the image is output to a plurality of transfer sheets, so that the front and back sides of the document are printed. An image forming apparatus, which reads an image and outputs the read image to a set number of different transfer sheets. 5. The number of transfer sheets for outputting the image read by the setting unit is set by the number of transfer sheets for outputting the image on the front side of the document and the number of transfer sheets for outputting the image on the back side of the document. Is set independently.
The image forming apparatus described.