JPH01296267A - Electronic copying machine - Google Patents

Abstract

PURPOSE:To easily perform the counting of sheets and to obtain necessary information for double-sided copying by providing an automatic document feeder with a counting function. CONSTITUTION:When a key 87 is turned on, a slave processor 102 receives the instructions of a master processor 101. The documents on a sheet supplying tray are taken in one by one from an upper side and fed, and jam check is performed. The counting of the number of the sheets is performed by incrimenting together with the opening and closing of a jam switch 482 when the documents are ejected. The number is inputted into the processor 102 through an interface 121. EEPROM120 becomes '0' by means of a clear key 84. The number is counted until a switch detects there is no sheet. The occurrence of jamming is displayed in a displaying part 111. When the switch 45 is turned off, the processor 102 reads the contents of a ROM120, sends a document number counting information signal to the main processor and displays the contents in the displaying part 111. A user can visually confirm the number of the sheets. The counting mode of the processor 101 is released by means of the clear key 84 and an ordinary copying mode is set. In the constitution, the counting of the sheets can easily be performed and the necessary information for double-sided copying can easily be obtained.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to an electronic copying machine.

(Prior Art) Currently, in electronic copying machines, in order to eliminate the trouble of setting originals one by one, when originals are stacked on the original stacking section, one sheet of the stacked originals is transferred to the exposure section during the copying operation. It is equipped with a so-called automatic document feeder that separates and conveys the originals, and each time the copying of the originals is completed, the originals are ejected to the original ejection section until there are no more stacked originals, and the stacked originals are transported to the exposure section. There is something. Furthermore, some automatic document feeders are capable of double-sided copying, and these devices have an additional device that reverses the exposed document and transports it to the exposure section again, without ejecting it. There is.

However, in electronic copying machines equipped with conventional automatic document feeders, when duplex copying is performed, if the number of originals is too large to be determined, it is necessary to count the originals in order to perform page alignment according to whether they are odd or even numbered sheets. It took a lot of time.

(Problems to be Solved by the Invention) As mentioned above, in conventional electronic copying machines, when performing double-sided copying, when the number of original sheets is large, page alignment differs depending on whether the sheets are an odd number or an even number. I had to count the number of manuscripts in advance, which was time-consuming.

In order to eliminate the above-mentioned drawbacks, the present invention provides a copying machine in which an automatic document feeder is equipped with a counting function, which makes it possible to easily count paper sheets and obtain necessary data for double-sided copying. With the goal.

[Structure of the invention]

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a paper sheet stacking section on which paper sheets are stacked, and a paper sheet that can expose the paper sheets in this paper sheet stacking section. a leaf exposure section; a paper discharge section into which the paper sheets exposed in the paper sheet exposure section are ejected and stacked; between a first conveying means for conveying the first conveying means, the sheet stacking section which is derived from the first conveying means, and the sheet exposing section, the exposed sheet is reversed and the sheet is exposed again. a second conveyance means for conveying to the exposure section; a detection means for detecting the conveyance of filter paper sheets in the first conveyance means; and a counting means connected to the detection means and counting output signals of the detection means. , a display means for displaying the data counted by the counting means, and a selection means for switching between a copy mode for copying paper sheets and a count mode for counting the number of paper sheets transported by the first transport means. Then, in the counting mode, the first conveying means uniformly conveys paper sheets from the sheet stacking section to the sheet discharging section, and furthermore, at this time, the detecting means, the counting means, and the An electronic copying machine is provided, characterized in that it is equipped with a control means for controlling the operation of a display means.

(Function) During operation, the electronic copying machine has a copying mode and a counting mode. When the counting mode is selected by the selection means, sheets are fed to the sheet stacking section, and the start key is turned on, , the paper sheets are transported one by one by the transport means and discharged. At this time, the conveyed paper sheets are detected by the detection means, the output signal of the detection means is counted by the counting means, and the counted data is displayed on the display means.

(Embodiment) FIG. 2 is a schematic cross-sectional view of a copying machine according to an embodiment of the present invention. As shown in FIG. 2, a document table 2, an automatic document feeder 3, and an operation panel 4 are provided on the top surface of a copying machine main body 1 (hereinafter referred to as main body 1). On the right side of the main body 1, an upper paper cassette section 6, a middle paper cassette section 7, and an upper paper cassette section 8 are provided as paper feeding sections for copy paper. The cassette 71 and upper paper feed cassette 8 are installed. Upper paper cassette 6
The cassette cover serves as a manual paper feed tray 9□ for manually feeding copy paper P1 as needed, and this is referred to as a manual paper feed section 9. A paper discharge tray 10 is attached to the left side of the main body 1.

A photosensitive drum 11 is disposed approximately at the center inside the main body 1 . Around this photoreceptor drum 11,
A charger 12 for charging, an optical system 13, a developing device 14, a charger 15 for transfer, a charger 16 for peeling, a cleaning device 17, and the like are arranged in this order.

Below the photoreceptor drum 11, there is a copy paper transport path that guides the copy sheets P, P, P, and P4 from each paper feed section to the paper output tray 10 through between the photoreceptor drum 11 and the transfer charger 15. 21 is formed.

The copy paper P1 is manually fed from the manual paper feed table 9□. The copy paper P2 is automatically fed by the pickup roller 8 from the upper paper feed cassette 6□.

The photo paper P3 is automatically fed by a pickup roller 9 from an intermediate paper cassette 7. The copy paper P4 is automatically fed from the upper paper feed cassette 81 by the pickup roller 20. This reproduction paper transport path 211 includes, from upstream, a paper stop switch 22, a registration roller 23,
A fixing device 24 and a paper discharge roller 25 are arranged in this order. The fixing device 24 includes a heat roller 26 and a pressure roller 2.
7a are arranged. A copy paper transport path 21 □ for multiple copying is formed below the paper discharge roller 25 . A transport path switching gate G1 is provided at a branch point between the copy paper transport path 21 and the copy paper transport path 21°. The copy paper transport path 212 is appropriately provided with transport rollers.

1! A copy paper transport path 213 for double-sided copying is formed on the right side of the copy paper transport path 21°. At the branch point between the copy paper transport path 21° and the copy paper transport path 213, a transport path switching gate G2 is provided. Furthermore, a gate G3 is provided to prevent the copy paper that has switched back in the copy paper transport path 213 from moving backward through the copy paper transport path 21□.

The optical system 8 has an exposure lamp 30 whose back is surrounded by a reflector 29, mirrors M1 to M6, and a lens 31.

Inside the main body 1, an upper frame and a lower frame (not shown) are pivotally supported at one end via a support shaft (not shown), and the other ends of both frames are opened at a desired angle, for example, about 30 degrees. It is configured so that it can be done. A charger 1 for charging is provided around the photoreceptor drum 11 in the upper frame.
2. Each device such as an optical system 13, an exposure lamp 30, a developing device 14, and a cleaning device 17 is attached by appropriate means. Furthermore, a document table 2, an overprint paper cassette section 6, and a manual paper feed section 9 are attached to the upper frame to constitute an upper unit IA. The lower frame includes an intermediate paper cassette section 7, a sketch paper cassette section 8, and a transfer charger 15.
, a peeling charger 16, a fixing device 24, a paper discharge tray 10,
Paper discharge roller 25, copy paper conveyance path 21. Each mechanism such as 21 and 213 is attached by appropriate means,
It constitutes the lower unit IB. After the front cover of the main body 1 is rotated and removed, it is configured so that it can be opened and closed approximately along the copy paper conveyance path 21 via a C-shaped opening/closing device (not shown).

Next, the operation of the copying machine having the above configuration will be explained.

The photosensitive drum 11 is rotationally driven in the direction of the arrow a in the figure by a drive mechanism (not shown) in synchronization with the optical system 13. First, the photoreceptor drum 11 is uniformly charged by the charger 12 for charging. Next, the optical system 13 projects a projected image of the document uniformly illuminated by the exposure lamp 30 onto the photoreceptor drum 11.
imaged on top. This image is an electrostatic latent image. The electrostatic latent image formed on the photoreceptor drum 11 is developed by a developing device 14 and turned into a toner image. The toner image on the photoreceptor drum 11 is sent to the side of the transfer charger 15 as the photoreceptor drum 11 is rotationally driven.

On the other hand, the copy paper P supplied automatically or manually from the paper feed section is fed onto the transfer charger by rotation of the registration roller 23 as the paper stop switch 22 is turned on. The paper stop switch 22
Sequence control is performed so that the toner image is turned on in synchronization with the toner image on the photoreceptor drum 11 after a predetermined period of time has elapsed from the time when the toner image is conveyed. The above-described toner image is transferred by the transfer charger 15 onto the copy paper P supplied onto the transfer charger 15 . The copy paper P on which the toner image has been transferred is peeled off from the photosensitive drum 11 by a peeling charger 16, passes through a copy paper conveyance path 21°, and is led to a fixing device 24. The copy paper P on which the toner image has been thermally fixed by the fixing device 24 is
If multiple copying or double-sided copying is performed, switch gate G1
The paper is conveyed to the copy paper conveyance path 21°. When neither multiple copying nor double-sided copying is being performed, the copy paper P is conveyed to the paper ejection roller 25 and ejected to the paper ejection tray 10. The copy paper P conveyed to the copy paper conveyance path 21 □ is conveyed as it is through the copy paper conveyance path 212 and guided to the paper stop switch 22 in case of multiple copying. During double-sided copying, the copy paper P is conveyed from the copy paper conveyance path 21° to the copy sheet conveyance path 213, where it is reversed.

The inverted copy paper P is again conveyed to the copy paper conveyance path 212 and conveyed to the paper stop switch 22.

On the other hand, after the toner image is transferred to the copy paper P, the remaining toner on the photosensitive drum 11 is cleaned by a cleaning device 17 in preparation for the next operation.

In the above series of operations, the microcomputer drives the controlled objects such as motors, lamps, and heaters in a certain sequence according to the inputs from the operation switch, the detection switch provided at each part, and other signal input means. This is achieved by

Next, the above-mentioned automatic document feeder 3 will be explained in detail with reference to FIG.

The automatic document feeder 3 is divided into three parts according to functions. The right side of the figure is the paper feed section 40 that supplies the original N, the left side of the paper feed section 40 is the inversion section 41 that inverts the document N for double-sided copying, etc., and the left side of the inversion section 41 is on the document table 2 (glass plate). Conveyance to set the original N at the exposure position and eject the original N
This is the discharge section 42 .

The paper feed section 40 is provided with a paper feed tray 43 as a means for setting documents N in a stacked state.

This paper feed tray 43 is detachably provided from the automatic document feeder 3 . The document N is conveyed from right to left in the paper feed section 40 . From the upstream side of this conveyance, a pickup roller 44, an empty switch 45 that detects the presence or absence of the document N, a paper feed roller 46, a separation roller 47, a jam switch 48 that detects a jam, and a pair of registration rollers 4
9 and size switches 50 for detecting the size of the original iN are provided in appropriate stages. It is preceded by position A. The pair of paper feed roller 46 and separation roller 47 are each pressed against each other by a spring or the like (not shown). Furthermore, the pair of registration rollers 49 are also pressed against each other by a spring or the like (not shown). All the rollers are rotatably provided, and in particular, the pickup roller 44 is also provided so as to be able to move in an upward and downward arc around a support shaft within a predetermined range.

The reversing unit 41 receives the document N that is reversely fed from the transport/discharge unit 42 , reverses it from front to back, and guides it to the transport path of the paper feed unit 40 . There, there is a document N with rollers arranged in a loop.
A transport path is formed. A gate guide 5 for switching the conveyance path is provided at the entrance of the loop-shaped conveyance path.
5 is provided. This gate guide 55 is provided so as to be able to move in a circular arc within a predetermined range, and is driven by a gate solenoid (not shown). Downstream from the gate guide 55 are a pair of reversing rollers 56 , a reversing switch 57 , a pair of reversing rollers 56 , a pair of reversing rollers 56
, a post-registration switch 58, and a pair of feed rollers 59 are provided by appropriate means. In front of this post-registration switch 58, there is a reversal stop position B that merges with the conveyance path of the paper feed section 40. All roller pairs are pressed against each other by a spring or the like (not shown). Reversing switch 57
and the post-registration switch 58 are respectively connected to the reversing roller pair 56.
This is a timing switch for aligning the document N to the feed roller pair 59 and the feed roller pair 59. The paper feed section 40 excluding the reversing section 41 and the paper feed tray 43 is covered with a reversing paper feeding section cover 60 that can be opened and closed.
A cover switch 61 is provided to detect opening and closing of the paper feed cover 60.

The reversing unit 41 is also provided with a transport motor (not shown) as a driving means and a motor clock sensor 62 that turns on/off the transport motor.

The conveyance/discharge section 42 is configured by holding a conveyance belt 71. This conveyor belt 71 has conveyor pulleys 70 and 702.
An endless belt stretched between the reversing part 41 and
The document N supplied from the document table 2 is conveyed along the document table 2.

Further, in order to stop the document at the exposure position C, a presser roller 72.72.72.72 presses the conveyor belt 71 onto the document table 2, a document stopper S1 driven by a solenoid, and while the original iN on the document table 2 is turned upside down. A pair of paper ejection reversing rollers 73 for ejecting, a pair of paper ejection rollers 74, and a paper ejection tray 75 for receiving the ejected original document N are transferred to the conveyance/ejection unit 42.
A jam switch 482 for detecting a jam is provided behind the paper discharge reversing roller pair 74. The paper ejection reversing roller pair 73 and the paper ejection roller pair 74 are each pressed against each other by a spring or the like (not shown). The conveyance/discharge section 42 is provided so as to be openable and closable in correspondence with the document table 2, and also serves as a document table cover. For this reason, the transport/discharge section 4
2 is provided with a set switch 76 that detects opening/closing of the transport/discharge section 42 itself. In addition, the transport/discharge section 4
2 is provided with a transport motor (not shown) as a driving means.

The transport motor is provided with a motor clock sensor 77 that turns on/off the transport motor, and an encoder 78 that generates pulses in response to on/off. As will be described in detail later, when the automatic document feeder 3 is used as a counter for the number of documents, the signal from the jam switch 482 described above is counted and displayed as the counted number of documents N.

Next, the operation panel 4 described above with reference to FIG. 4 will be explained. The upper right block in the figure of the operation panel 4 contains the main unit 1.
A preheating key 80 for preheating, an interrupt key 81 for setting an interrupt mode for interrupt copying, and a counter key 82 for displaying the number of times each developing device 14 has been used and the total number of times that each developing device 14 has been used are provided. The lower right block in the figure includes a copy key 83 for starting the copying operation, a clear key 84 for canceling the setting mode on the main body, a stop key 85 for canceling the operation of the main body 1, and setting the number of copies. A numeric keypad 86 is provided. The lower center block in the figure includes an original number mode key 87 for setting the main body 1 to original number counting mode, a color selection key 88 for selecting the copy color, and a user's intention in response to questions provided by the main unit 1. A no key 89, a yes key 90, a help key 91, and a magnification setting section 92 for setting enlarged copy, reduced copy, and same size copy are provided. At the top center of the diagram,
A display panel 93 is provided.

The block on the left in the figure includes a crush key 94 for erasing the outer frame of the original and copying, a page quick copy key 95 for performing page continuous copying,
Editing department 96 for superimposing, trimming, and masking settings
Also provided is a single-sided/double-sided mode selection key 97 for setting a single-sided original mode and a double-sided original mode.

Next, referring to FIG. 5, the configuration of the overall control system of the electronic copying machine will be explained. At the center are a main processor 101 that mainly controls the copying machine main body 1 and a sub-processor 102 that mainly controls the automatic document feeder 3. These mutually exchange various interface signals (details will be explained later).

The input section of the main processor 101 is connected via an input interface 103 such as a data selector to a manual switch 104 such as a document count mode key 87 on the operation panel 4, various other keys on the operation panel 4, and other controls. Various necessary detectors (switches, sensors, etc.) 105 are connected. Further, the following operations are connected to the output section of the main processor 101. They are a driver 106, a lamp control section 107, a driver 108, and a high voltage power supply section 109. The driver 106 drives the display section 111 such as various indicators on the display panel 4. A lamp control section 107 controls turning on and off of the exposure lamp 31. The driver 108 drives various drive systems (main motor, clutch, solenoid, etc.) 112. The high voltage power supply unit 109 drives the various chargers 113 .

The sub-processor 102 includes a storage device 120 (EEPR
OM) is provided. This will be discussed later.

The following devices are connected to the input section of the sub-processor 102 via an input interface such as a data selector. Empty switch 45, jam switch 48.
48, a size switch 50, a reversing switch 57, a post-registration switch 58, a cover switch 61, and a set switch 76. Further, a pulse generator 122 is connected to the input section of the sub-processor 102. The pulse generator 122 generates clock pulses at the encoder 78 attached to the transport motor 129 as described above. The output section of the sub-processor 102 includes a driver 123.12.
4.125.126 and 110 are connected. The driver 123 drives a solenoid 127 for moving the pickup roller 44 up and down. The driver 124 rotationally drives a paper feeding motor 128 for driving various paper feeding rollers 140 of the paper feeding section 40 and the reversing section 41 . The driver 125 rotationally drives a transport motor 129 for driving each transport roller 141 of the transport/discharge section 42 . The driver 126 drives the solenoid 103 for driving the document stopper S. The driver 110 drives a solenoid 130 for driving the gate guide 55.

The interface signals exchanged between the main processor 101 and the sub-processor 102 in this control system will be explained. The ink face signal sent from the main processor 101 to the sub-processor 102 includes a mode set signal (MOD-SET) and a document supply signal (0-IN).
), original discharge signal (0-OUT), original direction display signal (S-3ET), copying signal (D-RUN), feeder set signal (F-SET), original number count mode signal (C-MOD), etc. There is. The MOD-3ET signal is output when setting or changing the double-sided original mode or single-sided original mode, and when setting or changing the stacked original automatic supply mode or the 11-page original self-excited supply mode. The 0-IN signal is output when document N is supplied. The 0-OUT signal is
Output when document N is ejected. The S-3ET signal is the original N
Output when indicating Wi sending direction. The D-RUN signal is
Output on the copying machine main body during copying operation. The F-3ET signal is output according to the selection of manual, automatic magnification, automatic cassette, and initialization when outputting the MOD-3ET signal. The C-MOD signal is output when the document number counter mode is entered.

The ink face signal (signal indicating the state of the automatic document feeder N3) sent from the sub-processor 102 to the main processor 101 includes a document set signal (0-RDY), a feeder jam signal (D-JAM), and a feeder busy signal (
D-BUSY), feeder switch signal (D-SW)
, original size signal (SIZEO, 5IZEI, 5IZE
2 and 5IZE3), feeder mode signal (D-M
OD EO and D-~l0DE 1), semi, t-to signal (ASDF) original sheet count data signal (CDT
) and connection signals (DF-CNT). 0-RDY
The signal is output to indicate whether or not document N has been set. The D-JAM signal is output in a jam state. The D-BUSY signal is output while the document is being conveyed. D-
The SW signal is output when the conveyance/discharge section 42 and the reversing section cover 60 are in the open/closed state. 5IZEO, 5IZEI, 5
The IZE2 and 5IZE3 signals are output in, for example, a 4-bit x 3 binary code when the original N is supplied. D
-MODEO and D-MODE I signals are manual,
Output to indicate whether it is automatic magnification or automatic cassette. The ASDF signal is output to indicate whether the stacked document automatic supply mode is the single sheet mode or the automatic supply mode. The CDT signal is output as count data of the number of original sheets. The DF-CNT signal is output to indicate whether or not the automatic document feeder 3 is connected.

The relationship between the storage device 120 and the sub-processor 102 described above will be explained.

The storage device 120 is an EEPROM (electrically erasable/writable read-only memory) that stores the number of originals calculated by the sub-processor 102. The count data of the document N stored in the storage area of the storage device 120 is stored, for example, in a 4-bit x 3 binary code, but the storage area may be set wider.

The operation of the automatic document feeder 3 in the single-sided document mode set by the single-sided mode selection key 97 of the operation panel 41 in the above-described configuration will be explained with reference to FIGS. 3 and 5. .

When the power is turned on and the warming-up is completed, the empty switch 45 is set to the paper feed tray 43.
detects the document q and outputs an rHIGHJ level on signal to the sub-processor 102. Accordingly, the sub-processor 102 outputs a 0-RDY signal to the main processor 101. When the copy key 83 is input, the main processor 101 sends 0-I to the sub-processor 102.
Outputs N signal. The sub-processor 102 is 0-IN
When the signal is input, a D-BUSY signal is output to each driver, and supply of the original N is started as follows. When the sub-processor 102 supplies a drive signal to the driver 130, the solenoid 114 is turned on and the document stopper S is lowered. The driver 12 receives the output signal from the sub-processor 102.
When the rotation of the paper feed motor 128 is started via the feed roller 46 and the solenoid 127 is turned on via the driver 123, the pickup roller 44 descends while rotating in the transport direction, and transfers the document N between the paper feed roller 46 and the separation roller 47. Transfer to the pressure contact section. Next, the conveyor belt 71 is rotated in the paper ejecting direction, and the conveyor belt 71 performs a paper ejecting operation. This operation is
If there is a remaining original on the original platen 2, that original is ejected. If there is a remaining document, the jam switch 482 checks whether the document has been ejected or not, and the document stopper S is lowered. The original iN thus conveyed to the pressure contact portion between the paper feed roller 46 and the separation roller 47 is then conveyed only one sheet by the separation roller 47 which is driven in the opposite direction of the conveyance direction, and the jam switch 481 is turned on. Then, the document N is conveyed by the rotation of the paper feed roller 46 to a pair of registration rollers 49 which is stopped. After a predetermined period of time, paper feed motor 1
29 is stopped, and the conveyance of the original N is stopped.

Furthermore, after a predetermined period of time has elapsed, when the sub-processor 102 supplies a drive signal to the driver 124, the paper feed motor 129 starts to rotate in reverse. By the operation of the paper feed motor 129, a pair of registration rollers 49, a pair of reversing rollers 56. 56 and 5
63 is driven, and conveyance of the original N is resumed. As the original N is transported, the size switch 50 and the post-registration switch 58 are turned on. Next, the document N is transferred to the gate guide 5 facing upward by the rotation of the feed roller pair 49.
5 (with the solenoid 130 in the OFF state). Sub-processor 102 supplies a drive signal to driver 125. The driver 125 starts driving the transport motor 129 a predetermined time before the original N is transported to the transport belt 71 . When the original document N is transported by the transport belt 71, the transport belt 71 is being driven in the transport direction. The conveyor belt 71 conveys the document N to the document stopper S and stops there. The timing at which the conveyor belt 71 stops is set such that after the post-registration switch 58 detects the leading edge of the document N, the number of pulses counted by the encoder 78 reaches a predetermined number. Encoder 78 is attached to transport motor 129. Furthermore, the encoder 78 counts pulses generated when the motor clock sensor 77 is turned on/off.

A predetermined time before the document N is stopped at the document stopper S, the sub-processor 102 turns off the D-BUSY signal and notifies the main processor 101 of the end of document conveyance. The main processor 101 outputs a D-RUN signal and starts the copying operation after a predetermined period of time has elapsed since the completion of document conveyance is transmitted. The copying operation is as described above.

While the copying machine main body 1 is copying, a document N is placed in the paper feed tray 43.
If the automatic document feeder 3 is equipped with the document feeder 3, the automatic document feeder 3 performs a first feed operation for the document N. In the same manner as the above-described operation, the pickup roller 44 is lowered by the driver 123, and the next document N (the uppermost document) is taken out. After the document N is taken out, the switch 58 is turned on after being registered. Upon contact with the leading edge of the transported document N, the post-registration switch 5 is activated.
When a predetermined period of time has elapsed after the switch 8 was turned on, the conveyance of the original N is stopped. At the time when the document N is stopped, it is on the advance position A and is in a standby state.

When a predetermined period of time has passed after the copying is completed, the main processor 10
1 outputs the 0-IN signal again. Sub processor 10
2 is D-BUSY immediately when the 0-IN signal is input.
Outputs a signal and drives each driver to restart the conveyance operation. A drive signal is supplied to a driver 126 in the sub-processor 102 . Solenoid 114 with driver 126
By turning on, the document stopper S is lowered.

Sub-processor 102 supplies drive signals to driver 125. The conveyance motor 129 is rotationally driven by the driver 125, and the conveyance belt is rotated in the conveyance direction. The paper ejecting operation is performed in this manner. When jam switch 482 detects the trailing edge of document N, sub-processor 102 supplies a stop signal to driver 110. For this reason, the driver 12
At step 6, the document stopper S is raised. After a predetermined time delay after the conveyance belt 71 starts rotating in the conveyance direction, the document N at the first output position is conveyed by the conveyance belt 71. After this, the above-described operation is repeated.

When all the documents N on the paper feed tray 43 are fed, the empty switch 45 is turned off and the sub-processor 102
turns off the 0-RDY signal.

When the copying operation of the final original on the copying machine body is completed, only the paper ejecting operation is performed, and the advance operation is not performed.

After finishing copying the final original, the main processor 101 executes D-
Turn off the RUN signal. This completes the single-sided original mode operation.

Next, the operation in the double-sided original mode set by the single-sided/double-sided mode selection key 97 on the operation panel 4 will be explained.

The same operation as in the single-sided mode is performed until the first sheet of the original N set on the paper feed tray 43 is taken out and conveyed to the original stopper S. The document N is fed by the paper feed roller 14
0, and after a predetermined time has elapsed, the sub-processor 102 supplies a drive signal to the driver 110. The solenoid 130 is turned on by the driver 110, and the gate guide 55 is lowered. Further, when the sub-processor 102 supplies a predetermined drive signal to the drivers 124 and 125, the drivers 124 and 125 reversely rotate the reversing roller pair 56, 56, 563 and the conveyor belt 71. At the same time, the sub-processor 102 supplies a drive signal to the driver 110 and the solenoid 114 is turned on, so that the document N is scooped up from the document table 2 by the gate guide 55. The document N is conveyed by a reversing roller 56, and a reversing switch 57 is turned on. Further, the document N is conveyed by reversing rollers 562 and 563, and is stopped at a reversing stop position B by turning off the reversing drive. The timing at which the original N stops at the reversal stop position B is the original N.
This is because the sub-processor 102 supplies a drive stop signal to the driver 124 after a predetermined period of time has elapsed since the tip of the reversing switch 57 was turned on. At the same time as the inversion drive is turned off by the driver 124, the gate guide 55 is raised,
The conveyance belt 71 rotates in the conveyance direction, and after a predetermined period of time has elapsed, the sub-processor 102 supplies a drive signal to the driver 124, thereby restarting the rotation of the various rollers of the reversing section 41. As in the single-sided mode, the document N is conveyed by the conveyor belt 71 until it reaches the document stopper and is stopped.

After a predetermined period of time has elapsed, the main processor 101 activates the driver 108 and the high voltage power supply unit 109 to start the copying operation.
The drive signal is supplied to the At the end of copying, as in the single-sided mode, the main processor 101 - sub processor 102
The sub processor 102 outputs a 0-IN signal to the main processor, and the sub processor 102 outputs a D-BUSY signal to the main processor. As a result, the above-described reversing operation is repeated again. Thereafter, the paper ejection operation, advance operation, and conveyance to the document stopper S are performed in the same manner as in the single-sided mode.

From this point on, the above-described operations are repeated until all the documents N on the paper feed tray 43 are fed. When all the originals N on the paper feed tray 43 are fed and the copying operation of the final original is completed, the sub-processor 102 performs only the ejecting operation and controls not to perform the first-out operation, similarly to the operation in the single-sided mode. The main processor 101 turns off the D-RUN signal after copying the final original for the second time.

This completes the double-sided original mode operation.

Next, the operation of counting the number of originals in the automatic original feeding device 3 will be explained with reference to the flowchart shown in FIG.

When the original number mode key 87 is pressed after the power is turned on, the main processor 101 sets the original number counting mode and no copying operation is performed. The main processor 101 then outputs the C-MOD signal to the sub-processor 102. When the C-MOD signal is input to the sub-processor 102, the sub-processor 102 takes in the originals N set on the paper feed tray 43 one by one from above, and starts transporting the originals. The means by which the automatic document feeder 3 transports the document N is as follows:
This is the same as the operation in single-sided mode except that the copying operation is removed. And jam check is done in the same way.

To count the number of originals, press the jam switch 4 when ejecting the original.
The addition is performed once by the on/off signal of 82. When the jam switch 482 outputs an on/off signal once, the signal is input to the sub-processor 102 via the input ink face 121. The sub-processor 102 is
Upon signal input from the jam switch 482, the storage device 120
The contents are read out, "1" is added thereto, and the contents are stored again. However, the contents of the EEPROM 120 are cleared and set to O each time the clear key 84 is turned on. This operation is continuously performed until the empty switch 45 detects that there is no paper, and the number of sheets is counted by repeating feeding, transporting, and discharging the sheets. If a jam occurs, a message is displayed on the display unit 111 to indicate that the jam should be cleared. When the empty switch 45 is turned off and the final document is counted, the sub-processor 102 reads out the contents of the storage device 120 and outputs it to the main processor 101 as a CDT signal. Main processor 101 displays the number of originals on display unit 111 when the CDT signal is input. The user can visually check the number of original sheets. Main processor 101
The original number counting mode is canceled by pressing the clear key 84, and the normal copying mode is set.

FIG. 6 is a flowchart of processing when changing from single-sided copying to double-sided copying. When double-sided copying is set from single-sided copying using the single-sided/double-sided mode selection key 97 on the operation panel 4, "Even number of copies?" is displayed on the display section 111. Here, in the count mode, the number of originals N is counted, so there is no need to perform a troublesome counting operation. If the number of original sheets is an even number, press Yes key 90. Or,
When the copy key 83 is turned on, double-sided copying is set for all copies. When the number of originals is an odd number, the setting is made by pressing the no key 89 and then pressing the copy key 83. If the original has an odd number of sheets, only the first sheet is copied on one side. When document N is set on paper feed tray 43, main processor 101 outputs a duplex mode signal. The signal for duplex mode is M
It consists of an OD-SET signal on and a 0-OUT signal off. The sub-processor 102 sets the duplex mode manually based on the duplex mode signal. The transport operation in the duplex mode is as described above. In addition, the copying machine main body 1 performs copying operations up to the final document in the same manner as described above.

With the above configuration, conventional automatic document feeders were used, but by setting the count mode, it functions as a counter, so there is no need to install a new device (
, very efficient. It can also be used to count the number of copy sheets that have been copied and to compare and confirm the number of original sheets.

The present description is not limited to the above embodiment, and the object can also be achieved by indicating on the display whether the number of runts is an even number or an odd number.

〔Effect of the invention〕

As described in detail above, according to the present invention, since a counting function is added to the automatic document feeder, it is possible to easily count paper sheets and obtain data necessary for double-sided copying.

[Brief explanation of the drawing]

1 to 6 relate to one embodiment of the present invention, in which FIG. 1 is a flowchart for explaining the operation of counting the number of original sheets, FIG. 2 is a schematic cross-sectional view of the copying machine, and FIG.
The figure is a sectional view of the automatic document feeder, Figure 4 is a front view of the operation panel, Figure 5 is a block diagram of the control system, and Figure 6 is a flowchart for explaining the operation from one-sided copying to double-sided copying. be. 3...Automatic document feeder, 482...Jam switch 87...Document number mode key, 93.111...
Display section, 101... Main processor, 102...
Sub-processor, 120...Storage device agent Patent attorney Noriyuki Chika France

Claims (1)

[Claims] A sheet stacking section on which sheets are stacked, a sheet reading section that can read the sheets in this sheet stacking section, and the sheets read by the sheet reading section are discharged and stacked. a sheet ejecting section; a first conveying means for conveying sheets from the sheet stacking section to the sheet ejecting section via the sheet reading section; a second conveying means for reversing the sheet that has been conveyed to the reading section and conveyed to the sheet reading section again; a detection means for detecting the conveyance of the sheet by the first conveying means; a counting means connected to the detection means for counting output signals of the detection means; a display means for displaying the data counted by the counting means; a copying mode for copying paper sheets; a selection means for switching between a count mode for counting the number of paper sheets conveyed by the means; and a selection means for switching between a count mode and a count mode for counting the number of paper sheets conveyed by the means; and when paper sheets are conveyed by the first conveyance means in the count mode selected by the selection means, An electronic copying machine characterized in that the count value of the counting means is displayed on the display means.