JPH0519703B2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) The present invention relates to a copying machine with an automatic document feeder.

(Prior art) In a copying machine equipped with an automatic document feeder, one-to-one copying is performed by setting the automatic document feeder to automatic document feed mode (hereinafter referred to as ADF mode) or semi-automatic document feed mode (hereinafter referred to as SADF mode). When copying is performed on one sheet of transfer paper for one sheet of original, the original is ejected before the transfer paper is ejected, and the original precedes the transfer paper. The amount of advance increases further when a sorter or the like is connected to the main body of the copying machine with an automatic document feeder. In this case, if a jam occurs in the transfer paper in the main unit, even though the original is ejected, the transfer paper after the jammed paper is not ejected and becomes invalid, so the original needs to be recopied accordingly. Become. When recopying an original, it is necessary to set the original in the exposure position one after another.
Conventionally, the automatic document feeder was automatically set to SADF mode and the document was placed in the exposure position.

However, with this copying machine equipped with an automatic document feeder,
Since the document is reset in SADF mode, it is more inconvenient than resetting the document in ADF mode.

(Objective) An object of the present invention is to improve the above-mentioned drawbacks and provide a convenient copying machine with an automatic document feeder that can reset the document in SDF mode.

(Structure) In order to achieve the above object, the present invention provides a document placement table on which a document is placed, a document set sensor that detects the document placed on the document placement table, and a document set sensor that detects the document placed on the document placement table. an automatic document transporting means for transporting the original from the document mounting table toward the exposure position; and a document ejecting means for setting the original transported by the document transporting means at the exposure position and ejecting the original after exposure is completed. The apparatus includes a conveying device, a print switch that instructs to start copying, and a detection means that detects that the transfer paper is jammed, and when the document is detected by the document set sensor and the print switch is turned on. To,
In a copying machine with an automatic document feeder having an automatic document feed mode in which a document placed on the document placing table by the automatic document feeder is set at the exposure position and a copying operation is performed after the document is set, as shown in FIG. As shown, when the detection means 1 detects a jam in the transfer paper, the determination means 2 determines that the ejection of the transfer paper corresponding to the original set at the exposure position is not completed; and the determination means 2 When it is determined that the ejection of the transfer paper corresponding to the original set at the exposure position has not been completed, and the print switch 4 is turned on without the original set sensor 3 ever being turned off. prohibits the automatic document transport mode and executes the copying operation, and activates the automatic document transport mode when the print switch 4 is turned on with the document set sensor 3 turned off at least once and then turned on. The apparatus is characterized in that it includes a control means 5 for causing the copying operation to be executed.

FIG. 2 shows an embodiment of the invention.

The automatic document feeder 11 is pivotally mounted on the upper part of a main body 12, and the main body 12 is of a well-known type. In the pressure plate mode, the automatic document conveyance device 11 does not carry out document conveyance but is used as a pressure plate. As is well known in the automatic document feeder 11, when a document is manually placed on the document table 13 and set, the document set sensor 14 detects the document and turns on. In ADF mode, this state is the standby state. At this time, when a paper feed signal comes from the main body 11, a motor (not shown) rotates, and the separation belt 15, pull-out roller 17, and conveyance belt 18 rotate, and the document is conveyed by the separation belt 15 to the separation plate 1.
At step 6, only one sheet of the original is separated. This document is transferred to the main body 12 by a pull-out roller 17 and a conveyor belt 18.
The sheet is conveyed onto the transparent plate 19 , and after the trailing edge passes the paper feed sensor 20 , it is stopped at the exposure position on the transparent plate 19 . A conveyance belt 18 and a discharge roller 21 are rotated by a conveyance motor in response to a paper discharge signal from the main body 12, and the document on the transparent plate 19 is discharged onto a discharge tray 22. At this time, the ejection sensor 23 detects the ejected document, and based on the detection signal, a jam in the document is detected by a jam detection means as is well known. Here, the separation belt 15 is driven by a separation motor.

FIG. 3 shows the control circuit of this embodiment. A one-chip microcomputer 24 constitutes a control section of the document conveying device, takes in signals from the document set sensor 14, paper feed sensor 20, ejection sensor 23, etc., and outputs signals from the document set sensor 14, paper feed sensor 20, ejection sensor 23, etc. via I/O expanders 25 and 26. Display device 27 consisting of 7-segment light emitting diodes with digit configuration, separation motor M1, and conveyance motor M
2. Output data and control signals to clutch CL, etc. Further, a read-only memory 28 with input/output ports is connected to the microcomputer 24.
Signals are exchanged with the control section 30 of the main body 12 via the copying machine interface 29. The control section 30 takes in signals from the print switch, interrupt switch, etc. of the operation section, sensors, etc. of each part of the main body 12, and outputs signals to each part of the main body 12.

The microcomputer 24 operates according to the program in the read-only memory, and FIG. 4 shows a part of its main routine (pulse counting routine etc. are omitted). That is, the main routine checks the main body jam, paper feed command check, paper discharge command check, first copy paper start check,
First copy paper discharge check, paper feed JOB check,
Performs paper output JOB check, mode check, data out, interrupt check, etc.

FIG. 5 shows a main body jam check routine. In this routine, the microcomputer 24 checks the transfer paper jam detection signal from the main body 12 to check whether a jam has occurred in the transfer paper, and When a jam occurs in the transfer paper, the contents of the copy counter are checked.
This copy counter counts the number of originals to be recopied, and when the content is 1 or more, a "-" sign is displayed at the 10th position of the two-digit display 27, and at the same time, the display 17 Display the contents of the copy counter in the first place. Here, even if a sorter is connected to the main body 12, the content of the copy counter is only 4 at maximum. In addition, the mode mode flag (F) is set to set the mode mode (a mode in which the document is reset for recopying), and when the document is being transported or there is a document on the transparent plate 19, the document is In order to discharge the paper, the conveyance motor M2 is rotated by 1500P, thereby rotating the conveyance belt 18 and the discharge roller 21. The time from the start of document transport to the completion of ejection is approximately
It is worth 1300P. If the original is ejected normally, it will remain as is, but if the original is not ejected normally, it will jump to the original jam routine. The method for determining whether a document is normally ejected is to use a counter that counts up when the document starts to be conveyed and counts down when the trailing edge of the document passes the ejection sensor 23.
If the counter is ψ after the above-mentioned 1500P rotation, the original is ejected normally, and if it is not ψ, the original is jammed.

FIG. 6 shows the paper feed command check routine. In the main body 12, when the print switch is turned on by the user and a copying operation is performed
In ADF mode, a paper feed command is issued to set the original at the exposure position, but the microcomputer 2
4 is when this paper feed command is received in ADF mode, or when the document set sensor 14 is turned on and a paper feed command is received in SADF (semi-automatic document transport) mode, and in modoshi mode, the document sensor off F is not 1. If the document sensor off F is 1, the paper feed JOB counter is set to 1 when the paper feed JOB counter is ψ, and when the paper feed JOB counter is not ψ, the paper feed JOB counter is progressing. Therefore, leave it as is. Paper feed when not in modoshi mode
If the JOB counter is ψ, the paper feed JOB counter is set to 1.

FIG. 7 shows the discharge command check routine. In the ADF mode, the main body 12 issues a paper ejection command after copying (exposure) a set number of originals at the exposure position. When the microcomputer 24 receives a paper ejection command in ADF mode or SADF mode, it starts the paper ejection job.
If the counter is ψ, 1 is set in this paper discharge JOB counter.

FIG. 8 shows the start check routine for the first sheet of copy paper. When the main body 12 makes a first (first copy) copy of a document set at the exposure position onto a transfer sheet, it outputs a first sheet start signal when the transfer sheet leaves the sheet feeding device. The microcomputer 24 does not accept the first sheet start signal when the mode mode F is 1, and increments the copy counter when the mode mode F is ψ. In this case, the counter UPF is used as the erroneous count prevention flag.

FIG. 9 shows the final copy paper discharge check routine. When the final copy of the document set at the exposure position in the main body 12 is made on transfer paper, when the transfer paper is ejected from the main body 12 (if a sorter is connected to the main body 12, the transfer paper is placed in the bin of the sorter). The main body 12 determines this and outputs a final copy paper ejection signal. When the microcomputer 24 receives the most copy paper discharge signal, it causes the copy counter to count down. In this case as well, count DOWNF is used as a flag to prevent erroneous counting.

FIG. 10 shows the paper feed job check routine.
In this routine, the paper feed job is advanced according to the contents of the paper feed JOB counter. For example, when the paper feed JOB counter is 1, the separation motor flag MIF and clutch flag CLF are set and the paper feed JOB counter is set to 2, and when the paper feed JOB counter reaches 2, the clutch flag CLF is reset at a predetermined timing. Set 3 to the paper feed JOB counter.
Note that the paper feed JOB counter is cleared when the paper feed JOB ends.

FIG. 11 shows the paper discharge JOB check routine.
In this routine, the paper discharge job is advanced according to the contents of the paper discharge JOB counter. For example, when the paper discharge JOB counter is 1, the conveyance motor flag M2F is set and the paper discharge JOB counter is set to 2. Paper discharge job
The counter is cleared at the end of the paper ejection job.

FIG. 12 shows the data out routine. This routine outputs the contents of each flag and
By turning on and off components such as clutches, for example, outputting a separation motor flag MIF to control the separation motor, outputting a flap flag CLF to control the pull-out roller 17 drive clutch, and outputting a conveyance motor flag M2F. Controls the transport motor M2.

FIG. 13 shows the mode check routine. In this routine, when modoshi mode F is ψ, it is left as is, and when modoshi mode F is 1, if the copy counter is not ψ, its contents are displayed on the display 2.
If the document set sensor 14 is turned off, the document sensor off F is set. Also, if the copy counter is ψ, modoshi mode F,
Reset the document sensor off F to stop displaying "-" at position 10 on the display.

The automatic document feeder 11 can be set to any one of the pressure plate mode, SADF mode, and ADF mode using the operation section, and normally the document is set and copied in the same manner as in the prior art. That is, in the pressure plate mode, the automatic document feeder does not operate and is used as a pressure plate, and when the print switch is turned on, the main body copies the set number of copies of the original at the exposure position and then stops. In the SADF mode, originals are placed one by one on the original table 13, the originals are transported to the exposure position by the automatic document feeder, and the main body 12 copies a set number of copies. In the ADF mode, when a desired number of originals are placed on the original table 13 and the print switch is turned on, the automatic original feeder 11 sequentially sets the originals at the exposure position, and the main body 12 copies the set number of originals. Therefore, modoshi mode is generally set to 1 in SADF mode or ADF mode.
Occurs when performing a one-to-one copy. When the mode is set, as is clear from the above explanation, if the document set sensor 14 is turned on from off even once, that is, if the document to be recopied is placed on the document tray 13, a transfer paper jam will occur in the main body. The original on the original placing table 13 in the previous original transport mode is set at the exposure position. Furthermore, if the document set sensor 14 does not turn off even once after entering the mode mode, the document sensor off F remains at 0, so as is clear from FIG. 6, the paper feed JOB counter does not advance and the document is not fed. Instead, it becomes pressure plate mode.

The control unit 30 of the main body 12 is configured using a microcomputer and operates according to a program in a read-only memory. This program consists of a well-known program and a main body interrupt check routine shown in FIG. In the ADF mode, when a print signal is input from the print switch, the document feeder 11 sequentially feeds the documents to the exposure position and repeatedly copies each document by a set number of sheets. Now, document conveyance device 11
Each time the original is fed to the exposure position, the original is repeatedly copied by a set number of copies. Further, when the interrupt switch is pressed once and a signal from the interrupt switch is input as an interrupt mode setting command, the control unit 30 sets the interrupt mode as described later, and repeats copying. Even if it is, a new copy cycle is not started, and one original at the exposure position is copied by inputting a print signal from a print switch in an interrupt mode. Furthermore, when the interrupt switch is pressed in the interrupt mode and a signal from the interrupt switch is input as an interrupt mode cancel command, the control unit 30 cancels the interrupt mode as described later, and then outputs the print signal. When is input, iterative copying interrupted in interrupt mode is resumed.

Further, as shown in FIG. 15, in the main body interrupt check routine, the control section 30 sets the interrupt switch ONF when the interrupt switch is turned on, and sets the interrupt switch ONF when the interrupt switch is turned off. Interrupt mode F is a flag that is set while entering interrupt mode, and if interrupt mode F has been reset when the interrupt switch ON signal is received, interrupt mode F is set and the interrupt is executed. The document feeder 11 is set to the print mode and sends a discharge signal to the document conveyance device to cause the document conveyance device 11 to discharge the document at the exposure position. Then, the main body 12 determines whether or not it is in the middle of repeat copying, and if it is in the middle of repeat copying, it sends interrupt information and repeat copying in progress information to the microcomputer 24, and if it is not in the middle of repeat copying. The interrupt information is sent to the microcomputer 24. If interrupt mode F is set when the interrupt switch ON signal is received, interrupt mode F is reset to cancel the interrupt mode, and interrupt cancel information is sent to the microcomputer 24.

On the other hand, the microcomputer 24 controls the control unit 30 in the interrupt check routine as shown in FIG.
Check for the presence of interrupt information from. When interrupt information is received, the presence or absence of repeat midway information from the control section 30 is checked, and if there is repeat midway information, repeat midway F is set. Next, data replacement F
, put the selected mode of the document feeder 11 into the mode buffer, and
Set mode 1 to pressure plate mode. Furthermore, the contents of the copy counter are put into the count buffer and the display 27 is turned off. This data replacement is performed only once by data replacement F. It also checks the presence or absence of interrupt release information from the control unit 30,
If there is interrupt release information, the mode of the document conveying device 11 is returned to the mode stored in the mode buffer, and the data exchange F is reset. Next, check F during repeat, and if it is set, display "-" in the 10th position on the display 27, set 1 in the copy counter, and display 27.
By displaying "1" in the first place and setting modoshi mode F, the modoshi mode is set for the number of recopied originals to be "1". If F is not set during the repeat, the contents of the count buffer are returned to the copy counter and displayed on the display 27.
Note that the repeat midway F is reset when copying is started after interrupt mode is canceled.

Note that in the above embodiment, the SADF mode may be omitted and the automatic document feeder may be used in either the pressure plate mode or the ADF mode.

(Effects) As described above, according to the present invention, when a jam occurs in the transfer paper, the document can be reset in the ADF mode, which is convenient.

[Brief explanation of drawings]

Figure 1 is a block diagram showing the configuration of the present invention, Figure 2 is a block diagram showing the configuration of the present invention.
The figure is a sectional view showing a part of one embodiment of the present invention.
The figure is a block diagram showing the control circuit of the same embodiment.
14 to 14 are flowcharts showing a part of the main routine and each subroutine of the document conveying device in the same embodiment, and FIG. 15 is a flowchart showing the main body interrupt check routine in the same embodiment. 1...Detection means, 2...Determination means, 3...Document set sensor, 4...Print switch, 5...
...control means.

Claims (1)

[Scope of Claims] 1. A document placement table on which a document is placed, a document set sensor that detects the document placed on the document placement table, and a document set sensor that detects the document placed on the document placement table. an automatic document feeder comprising: a document feeder that feeds the document toward an exposure position; and a document ejector that sets the document transported by the document feeder to the exposure position and ejects the document after exposure; and starts a copying operation. a print switch that instructs to print the paper, and a detection means that detects that the transfer paper is jammed, and when the document is detected by the document set sensor and the print switch is turned on,
In a copying machine with an automatic document feeder having an automatic document feed mode in which a document placed on the document placement table by the automatic document feeder is set at the exposure position and a copying operation is performed after the setting, the detection means determining means for determining, when a jam in the transfer paper is detected, that ejection of the transfer paper corresponding to the original set at the exposure position has not been completed; When it is determined that the ejection of the corresponding transfer paper has not been completed, if the print switch is turned on without the original set sensor being turned off even once, the automatic original transport mode is prohibited and the copying operation is performed. and a control means for operating the automatic document transport mode to execute a copying operation when the print switch is turned on while the document set sensor is turned off and then turned on at least once. A copying machine with an automatic document feeder featuring: