JPS6114650A - Copying control device - Google Patents

Abstract

PURPOSE:To prevent a waste of a developer at the time of wrong setting and an offset phenomenon generated by a fixing device, by providing a control means for stopping an operation of a picture image forming means by receiving a copying halt instruction, when a copying image is being formed. CONSTITUTION:A CPU200 is connected to a key matrix constituted of a ten key 103, a stop key 104, a clear key 105, etc., and a display part 102, and also, a main motor, a developing motor, an electrostatically charging charger, a carrying roller, a cutter, etc. are connected to an output port, and an operation control of a reader printer is executed. When a copying mode switching key of an operating panel is operated in the course of multi-copying, a feed paper control corresponding to a feed paper state of that time is executed, and also the image formation is halted by turning off the electrostatically charging charger and the developing motor. In this way, in case a setting mistake is noticed when an image is being formed, the image formation can be halted immediately, and a waste of a developer and an offset phenomenon can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying control device such as an electrophotographic copying machine and a reader printer.

2. Description of the Related Art Conventionally, copying machines such as copying machines and reader printers have been provided with a stop key, and when this key is operated during continuous copying, the key operation is executed when the key operation is accepted. The copying operation is stopped upon completion of the copying routine.

Furthermore, Japanese Patent Application Laid-Open No. 57-188050 discloses a copying machine that can stop the paper feeding operation by pressing an interrupt key after the print key is pressed but before the paper feeding operation starts. It is shown.

However, in the above-mentioned copying apparatus, even if you press the print key to start copying, immediately realize that you have made a mistake, such as the wrong copy magnification or paper size, and press the stop key, the paper feeding operation will not start. If it had been done after that, the copy would have been executed to the end, resulting in a waste of developer. In particular, in a copying machine that can switch from positive to positive, if you make a mistake in switching between positive and positive, the background of the image will become solid black and a large amount of developer will be wasted. It is easy to cause inconvenience.

As a means for solving the above problem, the copy control device according to the present invention includes a means for inputting a copy interruption command and a means for receiving the copy interruption command when the image forming means is operating to form a copy image. and a aiming control means for stopping the operation of the image forming means.

Embodiments An embodiment of the present invention will be explained below with reference to FIGS. 1 to 10.

FIGS. 1 and 2 are an external view and a schematic sectional view C showing the aperture card reader printer of this embodiment.
FIG. 3 shows a schematic configuration of the optical system.

In FIG. 3, (1) is a microfilm, which is inserted into an aperture card (not shown) and held so that the center of the image on the film (1) coincides with the center of the card opening. The reader is equipped with a reflector (2L lamp (3L condenser lens) (4L projection lens (5)
The center of the film (1) is aligned with the optical axis It is like that.

On the other hand, when using a printer, after the film (1) is returned to the scanning start position, the film (1) is scanned in the direction shown by the arrow P in FIG. The projected image enlarged through the system is transferred to a photosensitive drum (
9) Slit exposure is performed on the top. The projection lens (5) has three types of magnification: 145x, 10x, and 75x, and the desired magnification can be selected by operating a button on the operation panel.

The printer section consists of a known powder image transfer type electrophotographic copying device, and a charger (1) is installed around the photosensitive drum (9).
0), a developing device (11), a transfer charger (12), a separation charger (13), and a cleaning device (14) are arranged in sequence in the drum rotation direction. (15) and (
16) are roll papers having different paper widths, one of which is selected and sent from the paper feed path to the transfer position B of the photosensitive drum (9). Note that it is also possible to mount two roll papers of the same paper width. (17)
is a fixing device, in which the copy paper that has been transferred is fixed, and then sent out of the machine.

Roller pair (18), (]9), (20),
(21) etc. The paper feed drive system consists of a photosensitive drum (9)
The main motor consists of a synchronous motor (2
2), it can be driven in forward and reverse directions.

In Figures 2 and 4, (23) is a part of the cutter placed in the middle of the paper feed path, which allows the roll paper (15
) or (16) is cut into copy sheets of a predetermined cut size. A paper feed sensor (
24) is provided, and the paper feed sensor (24) detects the leading edge of the roll paper, turns off the paper feed clutch of the paper feed drive system, and temporarily stops the roll paper at this position C. There is.

Figure 185 shows the operation panel (100), (101) is the print key, (102) is the copy number display section, (103)
) is the numeric keypad, (104) is the key to turn on/off the lamp (3) when used as a reader, (
105) is the clear key to set the number of copies to "Bi", (
106) to (108) are lens switching keys, (106a
) to (108a) are lamps that display the selected lens magnification, (109) to (112) are copy size selection keys, and (109a) to (112a) are lamps that display the selected copy size. Further, (113) is a copy mode switch key for switching the copy mode between negative-positive copy mode and hard-bodied copy mode, (113a) is a copy mode display lamp, and (114) is for switching the exposure mode between automatic exposure mode and automatic exposure mode. Exposure mode switching key (115) is manual exposure adjustment switch, (114a)
) is an exposure mode display lamp, (116) is a paper feed section selection key, and (]]6a) is a lamp that displays the selected paper feed section.

In the above configuration, the print key (101
) is turned on, printer operations are performed in the following steps. That is, - When a print command is given by operating a button on the operation panel, an optical path is opened from the projection optical system to the printer optical system in the optical system shown in Fig. 3, and the paper feed clutch is accordingly turned on. , paper feeding starts.

■ When the leading edge of the roll paper that has passed through the cutter part (23) is detected by the paper feed sensor (24), the paper feed clutch is turned off and the roll paper is temporarily stopped.

■ On the other hand, the scanning drive system receives a detection signal from the paper feed sensor (24), confirms the completion of photometry, and moves the film (1) to a predetermined scanning start position. After a predetermined period of time has elapsed for the vibrations to subside, the scanning clutch is turned on to start scanning the film image, and slit exposure is sequentially performed on the circumferential surface of the photosensitive drum (9) from the exposure position shown in FIG.

■ At the transfer position B of the photosensitive drum (9) shown in FIG. 4, the exposure image on the drum surface and the copy paper fed from the paper feed path match each other for a predetermined time Ts from the start of scanning.
After the elapse of time, the paper feed clutch is turned on and the roll paper is fed again from the temporary stop position C.

j After a predetermined time Tc elapses from the start of paper refeeding until the length C from the cutter part (23) to the leading edge of the roll paper corresponds to the enlarged image exposed on the photosensitive drum (9), the force
When the tersolenoid is on-site, the roll paper is cut into copies of a predetermined size.

(2) When the trailing edge of the copy paper is detected by the paper feed sensor (24), the scanning bluff 1 is turned off and the exposure is completed.

(2) Thereafter, transfer, separation, and fixing are performed on the copy paper in a predetermined order, and the copying operation is completed.

During the above printer operation, if it is determined that there is a mistake in the setting of the copy mode and the copy mode switch key (113) is operated, five different types of control will be executed depending on the paper feeding state at that time. . Here, the five types of control will be explained.

■ When the copy mode switch key (113) is pressed during the first paper feeding state from the start of the print command until the leading edge of the roll paper is detected by the paper feed sensor (24), charging and development are immediately stopped. At the same time, the leading edge of the roll paper is detected by the paper feed sensor (24)+, and the roll paper is transported by r-r.
At the timing when the paper feed sensor (24) detects pressure at the leading end, the paper feed system is driven in reverse to return the roll paper to its initial state.

The paper feed system is driven in reverse after the leading edge of the roll paper is detected by the paper feed sensor (24) whenever the first paper feed state C stop key (104) is pressed. This is to return the roll paper to a certain initial state in a certain period of reverse driving time.

'3 When the leading edge of the roll paper is detected by the paper feed sensor (24) and the copy mode switch key (113) is pressed in the second paper feeding state where the paper feeding operation is temporarily stopped, the charging and developing Immediately stops the roll paper and drives the paper feed system in reverse to return the roll paper to its initial state.

■ When the roll paper is re-fed from the second paper-feeding state and the length of the fed paper is shorter than the shortest length that the paper feeding system can pass, the copy mode is activated. When the switching key (113) is pressed, charging and development are immediately stopped, and the roll paper is cut to the shortest possible length to return it to its initial state.

■ When the copy mode switch key (113) is pressed in the fourth paper feeding state where the roll paper is further fed from the third paper feeding state and the cutter has not yet reached the specified length, the charging and To immediately stop the development and also immediately cut the roll paper to return it to its initial state.

(2) When the copy mode switching key (113) is pressed in the fifth paper feeding state where the roll paper has already been cut to a specified length, charging and development are immediately stopped.

As shown in ■~■ above, press the copy mode switch key (11
When 3) is pressed, control is performed according to the paper feeding state at that time. The feeding length of the roll paper is determined by the on/off state of the tip sensor (24), which is input to the microcomputer described later.
It is calculated based on the off timing, on time, etc., and the reverse drive time of the cutting system is set according to the paper feeding length.

FIG. 6 shows a control unit consisting of a microcomputer, where (200) is a CPU, (201) is a RAM,
(202) The CPU (200) is connected to a key matrix and display section (102) consisting of keys such as a numeric keypad (103), a stop key (104), and a clear key (+05). In addition, the output boat is connected to the main motor, developing motor, charger, conveyance roller, cutter, etc., and the ROM (
202) controls the operation of the reader printer by outputting output signals corresponding to signal inputs from each key and switch.

The operation control executed by the CPU (200) will be explained in detail below.

FIG. 7 is a 71t-chart that generally shows the control executed by the CPU (200). The micro image placed on the aperture card is enlarged and projected onto the screen (6) 7. Then, the processing is executed. Specifically, the lighting of the lamp (3),
This includes switching the projection lens (5), etc. In step #3, it is determined whether the print key (+01) has been turned on, and if it has been turned on, the process proceeds to the next step #4. In step #4C, a printer process of copying the micro image of the aperture card onto copy paper is executed, the details of which will be explained in detail with reference to FIGS. 8 to 10.

In step #5, it is determined whether or not the preset number of copies have been completed. If not, the process returns to step #4 and the printer process is repeated; if it has been completed, the process returns to step #4! Return to 2.

FIG. 8 shows details of printer processing executed when the print key (101) is turned on. Step 114
+r sets the feed end state flag F1 indicating that the leading edge of the paper is in the first state where it has not reached the paper feed sensor (24).

In step 1142, the print flag F13 indicating the start of the copying process until one copy is completed is set to 0.
If it is "0", the print flag is set to '1' in step 1143, and if the print flag Fp is '1', the process directly proceeds to step #44.

Step #44 is a process of enlarging and copying the micro image held on the aperture card onto copy paper according to the steps ① to ② described above, and when one copying process is completed, that is, one copy is formed. When this happens, the print flag Fp is set to "0".

In step #45, the status of each key on the operation panel-1-, sensors, switches, etc. provided inside and outside the machine is checked.

In step #46, it is determined whether the copy mode switching key (+13) has been operated, and if it has been pressed, the process advances to step #47.

In step #47, copying interruption processing is executed in accordance with the paper feeding state at the timing when the copying mode switching key (+13) is pressed. The paper feeding state determined in step 148, which will be described later, is used. Also, in this step, the print flag FP is set to "O...".The details of this step will be explained using FIG. 9.

Step ll'48 is a process for checking the paper feeding state during the copying process, the details of which will be explained using FIG. 10.

Step #4971- determines whether the print flag Fp is 0'', and if it is not "0", step #4971-
On the other hand, if it is °'0"C, the process returns to the main routine shown in FIG.
When the flag is set to "P1", one multi-step process is completed and step #44C print flag F p M "O"'
or the copy 1 need change key (113) is pressed and the print flag FP is set to ``0'' in step #47.

Processing of Sumitomo Tsubu attack 42-1149 is done until
' The first copy is executed repeatedly, and the copy block 111-
When the process ends, copy child -1' lul + exchange key (+13
) is pressed (1), the process returns to the main routine.

FIG. 9 shows a switching processing subroutine that is executed when the copy mode switching key (113) is pressed. Immediately after the copy mode switching key (+13) is pressed, step 14
Steps 701 to #4703 are executed, and processes corresponding to the paper feeding state when the copy mode switching key (113) is pressed are executed at steps n4704 to #4712.

In step 147, a lamp is turned on to indicate the switched copy mode. Step #4702 r turns off the charger, and step #4703
C interrupts image formation by turning off the developing motor. Therefore, when the m copy mode switching key (113) is pressed, a message indicating that switching processing is being executed is immediately displayed and image formation is interrupted.

In step #4704'r, it is determined whether or not the paper feeding state is in the first paper feeding state C. Not reached 2
Next, the process returns to the printer processing routine shown in FIG. 8 and continues with the step ``Continue conveying the 1-role paper''.

Step! In step 4705, it is determined whether the paper feeding state is the second paper feeding state, and the paper is re-fed after the second paper feeding state, that is, the leading edge of the roll paper reaches the paper feeding sensor (24). If it is in a paralyzed state, the roll paper is rewound to its initial state in step 14706, and if multi-copying is in progress in step 114707, the number of copies is reset to the number set manually using the key, and the print flag Fp is set to '' in step #4708. Since the value is set to "0" and printed, the process returns to the main routine in step #49. In the case of single copy, the reader processing routine of step #2 is failed and the reader state is returned to the state before the print key (+01) was pressed, while in the case of multi-copy, the number of copies is set to +1G. Therefore, +Fl is returned to step #4 by the process of step #5, and copying is performed for the initially set number of sheets using the switched copying code.

In step 54709r, it is determined whether the paper feeding state is the third paper feeding state, that is, the leading edge of the roll paper is re-fed, and the paper can be fed for the length of 11 times. If the length is shorter than the minimum length, the process returns to the printer processing routine and continues conveying the roll paper.

In step II 47]0, it is determined whether the paper feeding state is the fourth paper feeding state, that is, the roll paper is conveyed longer than the shortest length that can be passed. If it is not cut to the specified length, immediately proceed to step s.
4711 r Cut the roll paper l/l, step 147
+2 to rewind the roll paper to the initial position and step m
4707 and step It 470B and return. In the case of a single copy, the printer returns to the reader state before the print key was pressed, while in the case of multiple copies, copies are made again in a new copy mode.

If it is determined in step II 4710 that the fourth paper feeding state is not present, the state is the fifth paper feeding state, that is, the state after the roll paper has been cut to a predetermined length, and in that case, step $
4707 and step $4708 and return. If copying one sheet, press the print key (101)
Returns to the reader state before the button was pressed, and in the case of multi-copy, copies are made again in the switched copy mode.

Therefore, when the copy mode switching key (113) is pressed,
Immediately, image formation is stopped (1-), and when copying one sheet, if the paper feeding state when the copy mode switching key (113) is pressed is the first paper feeding state, it becomes the second paper feeding state. When the roll paper is fed until the second paper feeding state is reached, the roll paper is rewound. If the roll paper is in the second paper feeding state, the roll paper is immediately rewound, and if it is in the third paper feeding state, the roll paper is rewound. The roll paper is fed until it reaches the fourth paper feeding state, and when it reaches the fourth paper feeding state, the roll paper is cut and rewound. If it is in the fourth paper feeding state, the roll paper is immediately cut. When rewinding, if the fifth paper feeding state C is immediately returned to the reader state of n7■ in which the print key (101) is pressed, respectively, if the mark f-=r is temporary, then 1-distributed paper After the control, multi-copying of the initially set number of sheets is executed in the switched copy mode.

The reason why the roll paper is not rewound immediately in the first paper feeding state but is fed to the second paper feeding state and then rewound is that the copy mode switch key is pressed when the paper is in the first paper feeding state. (
113) is pressed and when the copy mode switching key (+13) is pressed in the second paper feeding state, the roll paper rewinding time can be made the same, making control easier. It's for a reason.

Therefore, although the control becomes somewhat complicated, it is of course possible to immediately return C to the initial position when the copy mode switching key (113) is pressed even in the first state.

FIG. 10 shows a paper feeding check processing routine that sequentially checks the paper feeding status of the roll paper being fed during printer operation, and the paper feeding status information (paper feeding status flag) checked in this routine is Used for processing.

Before starting this routine, press the print key (+04).
When is pressed, in step #41 of the printer processing routine, the status flag F1 indicating the first paper feeding state is set to ``1''.

In step #48 old, it is determined whether the status flag l++ indicating the first paper feeding status is '1''.
b Proceed to step #4802. In step $4802, it is determined whether the leading edge of the roll paper has been detected by the paper feed sensor (24), and if no, that is, the leading edge of the roll paper is being fed between the initial position and the paper feed sensor (24) returns as is, while if the tip is detected, step #480
Step 3 changes the state to OFF, which indicates the first paper feeding state. Therefore, the leading edge of the roll paper moves from the initial position to the paper feed sensor (2).
4) is considered to be the first paper feeding state, and after the leading edge is detected by the paper feeding sensor (24), the second paper feeding state is reached.
The paper is being fed.

In step 14805, it is determined whether the status flag F2 indicating that the paper is in the second paper feeding state is 1", and the process proceeds to step #4806. In step #4802, it is determined whether the roll paper is re-fed or not. If the paper roll is temporarily stopped at the position where the leading edge of the roll paper is detected by the paper feed sensor (24), the process returns as it is, but when paper refeeding starts, the process returns to step!4807. Second
The state flag F2 indicating the third paper feeding state is set to 0", and the state flag F3 indicating the third paper feeding state is set to °'1" in step 1480B. Therefore, the second paper feeding state is set when the leading edge of the roll paper is detected by the paper feeding sensor (24) and the paper is temporarily stopped, and the third paper feeding state is set when paper refeeding starts.

In step 114809, it is determined whether the status flag F3 indicating the third paper feeding status is 1''.
If it is “1”, that is, the third paper feeding state, step #48]
Go to 0. In Step II 48]0, it is determined whether the re-fed length of the roll paper is longer than the shortest length that can be fed, and if no, that is, the re-fed length is the shortest length that can be fed If the length has not been reached, the process returns as is, but if the shortest length that can be fed is reached, step $4811 is executed.
Set the status flag indicating the third paper feeding status to “0”.
At the same time, in step i+4812, the state flag F4 indicating the fourth paper feeding state is set to "1". Therefore, while the re-fed length of the roll paper does not reach the shortest length that can be fed, it is in the third paper feeding state, and after reaching the shortest length that can be fed, it is in the fourth paper feeding state. It is set to paper feeding state.

In step 14B+3, it is determined whether the status flag F4 indicating the fourth paper feeding status is "1" or not.
If it is the fourth paper feeding state, step 14814
Proceed to. Step #4814r determines whether the roll paper has been cut to a predetermined length.
If the value has not been reached, it will return as is, while
When the paper is cut to a predetermined length, the state flag indicating the fourth paper feeding state is set to "0" in step #4B+5. Note that after the processing in step 148+5, all status flags Iz-F4 are set to ``0'', and this status can be distinguished from other statuses, so it is possible to identify the fifth paper feeding status. A new flag indicating (4) is not set. Therefore, the roll paper is in the fourth paper feeding state until it is cut to the desired length, and one copying process ends after it is cut to the desired length. The state C is set to the fifth paper feeding state.

In the fifth paper feeding state, each state flag F1 to
Since F4 is all "0", a negative determination is made in step #4813, and the process returns to the printer processing routine. Then, in step #44, one copying process is completed and the print flag Fp is set to "0", and the process returns to the main routine via step #49, where the multi-copy process continues or a new print key is pressed. (
101) is pressed and the printer processing routine is executed again, the first paper feeding state flag F+ is set to "1" again in step #old.

With the above control, if you press the print key (101) to start the printer operation, and then realize that you have made a mistake in selecting the copy mode and operate the copy mode switch key (113), image formation will be stopped immediately. (When switching between copying and positive-positive copying)
；A large amount of paper is used to obtain a solid black color41
This method not only prevents the occurrence of overprinting, but also prevents the current problem of off-prints where the excessively transferred sheets of paper 1-- are fused to the fixed stone device (17). I can do 11 things.

Furthermore, when the 1) J insert button (+13) is pressed, the paper feed control according to the paper feed state φ of the II-roll paper in 3 causes the lI to be wasted. -The least amount of paper can be sold J- is C cut.

In addition, in the -1-Note 1-1 example, when the copy mode switch key (+13) is operated during multi-copy 1 heating, image formation is immediately stopped. The paper feed control is performed according to the print key (10
1) It can also be controlled to return to the leader state before it was pressed. Specifically, step # in Figure 9
This is achieved by clearing the multi-copy settings in step 4707. By controlling in this way, for example, if you press the print key (101) while setting the copy magnification, sheet size, etc. incorrectly and start multi-copying, even if it is 0, the copy mode switch key ( By pressing +13), the copying operation can be stopped with minimal wastage of toner and roll paper. In this case, the copy mode switch key (+13) is also used as a manual input for interrupting the copy operation.
A dedicated stop key is provided without using 111.
Good too.

Effects As is clear from the above explanation, the copying control device according to the present invention has a means for inputting a copying interruption command and a means for inputting a copying interruption command, and a means for receiving a copying interruption command when the image forming means is operating to form a copy image. Since the image forming apparatus is characterized in that it is equipped with a control means for stopping the operation of the image forming means, image formation can be immediately interrupted when any setting error is noticed during image formation. It is possible to minimize wastage of developer, and in particular, in a copying machine that can switch between garbage and positive-positive copying, a large amount of developer consumption can be avoided if the switching is incorrectly done.
゛+The offset current forest generated by device C can be efficiently prevented.

[Brief explanation of drawings]

Fig. 1 (continued) and Fig. 2 are an external perspective view and a schematic sectional view of a leader link to which the present invention is applied, and Fig. 3 is its) 1
- Schematic diagram of the academic system, Figure 4 is a partially enlarged sectional view, Figure 5 is the -1- track interval of the control f1 penel, Figure 6 is the circuit diagram of the control circuit,
FIG. 7 is an I-chart that generally shows the processing executed by CP IT, FIG. 8 is a flowchart showing details of printer processing, and FIG. 9 is a flowchart showing details of the stop processing→L routine. Figure 10 is a flowchart C showing details of the paper feed check processing subroutine. 9... Photosensitive drum, 15.16 Roll paper, 18
．． 19° 20, 21... Roller pair, 23. Cutter part, 24... Paper feed sensor, 101 - Print key,
113...Copy mode switching key, 200...CP
U Applicant Minolta Camera Co., Ltd. Figure 1 JP-A-6L-14650 (8) Figure 2 Figure 3 Figure 7 Keyaki Tao

Claims (1)

[Claims] 1. It is characterized by comprising means for inputting a copy interruption command, and a control means for stopping the operation of the image forming means upon receiving the copy interruption command when the image forming means is operating to form a copy image. A copy control device that uses