JPS6111761A - Device for controlling copying machine - Google Patents

Abstract

PURPOSE:To shorten copying time by installing the second automatic shutting timer set by the operation of an operator during operation of the first automatic shutting timer. CONSTITUTION:When an original pressing plate 16 is shut, a reed switch 17 is turned on by the force of a magnet 18, and when the plate 16 is opened, the switch 17 is turned off as a means for detecting the operation of an operator. In said structure, when the plate 16 is opened during the operation of the first automatic shutting timer set at the timing of the end of copying, the first timer is reset, and the second automatic shutting timer is set. When the next copying start signal is inputted during the operation of the first or the second timer, copying action is immediatedly started.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a control device for a copying machine.

2. Description of the Related Art In conventional copying machines, an auto-shut timer is operated for a certain period of time after copying is completed, and during that time a so-called post-rotation is performed to completely remove toner and electric charge remaining on the surface of the photoreceptor drum. If the next copy start signal is not input before the timer ends, the main motor, cooling fan, eraser, etc. will be stopped at the end of the timer and the printer will enter a standby state, but the print button will be pressed before the timer ends. When the print button is pressed in the standby state, the photoconductor drum is rotated for a predetermined period of time to stabilize the copying machine prior to image exposure, and charging and discharging are performed. It is controlled so that so-called forward rotation is executed. moreover,
Japanese Unexamined Patent Publication No. 51-78341 discloses a mechanism and control for releasing a cleaning blade that is in pressure contact with a photoreceptor drum when a copying machine is automatically shut down and placed in a standby state.

Generally, the number of copies made from one original is most often one, and copies are made by sequentially replacing many originals one by one on the original table.

However, when using a copier with the above control, when trying to make one copy from a large number of originals, if the auto-shut timer setting is short, the timer ends and the machine goes into standby mode while the originals are being replaced. , it is necessary to perform pre-rotation every time a copy is made, which increases the copying time. Furthermore, since the main motor, cooling fan, etc. are turned off and the cleaning blade is released from pressure contact each time an auto-shut is performed, mechanical wear and tear is significantly increased.

Means for Solving the Problems The control device for a copying machine according to the present invention has, as means for solving the above problems, a first auto-shut timer that is set at the timing of the end of copying, and a first auto-shut timer. a second auto-shut timer that is set by an operator's operation while the shut timer is in operation; a reset means that resets the first auto-shut timer when the second auto-shut timer is activated; The copying machine includes a control means that determines whether the shut timer or the second auto-shut timer has ended and places the copying machine in a standby state.

Embodiment FIG. 1 shows a copying machine (1) that employs a control device according to the present invention.
) is a cross-sectional view showing a schematic configuration of a photoreceptor drum (2), in which a photoreceptor drum (2) is provided approximately in the center thereof so as to be rotatable in a clockwise direction, and a residual charge on the surface of the photoreceptor drum (2) is disposed around the photoreceptor drum (2). Eraser (3) that removes static electricity, charger that charges uniformly (
4), a developing device (5) that converts the electrostatic latent image into powder, and a transfer/separation charger (6) that transfers the powder image onto the copy paper and peels off the copy paper after the transfer from the photoreceptor drum (2). ), and a cleaner (7) for removing residual toner after transfer are disposed in this order.

Further, an exposure lamp (8) is provided above the photoreceptor drum (2).
), mirror (9), (4o), (11), (1
2), a scanning optical system (13) consisting of a projection lens (13);
14) is provided, which scans the original held between the original mounting table (15) and the original pressing plate (16), and sequentially transfers the scanned image onto the uniformly charged photoreceptor drum (2). An electrostatic latent image is formed by projecting the image.

On the other hand, the paper feed section (19X2
0) is provided, and the copy paper stored therein is transported between paper feed rollers (2], ), (22), and intermediate rollers (2).
3), timing roller (24), conveyor belt (25)
, a fixing roller (26), a paper ejection roller (27), and a transfer/separation charger (6). The powder image is transferred and fixed by the fixing roller (26) to form a copy image.

Above the fixing cola (26), a main motor and a cooling fan (30) are provided. mirror (9),
(10) Near (11), there is a fixed position switch (50) that detects that the scanning optical system (14) is in the fixed position, and a paper feed section (19).

(20) is a switch (
ESS) and (ES2) are provided, respectively.

In addition, as a means for detecting the operator's operation, a reed switch (17) is mounted on the document table (15), and a red paper (18) is mounted on the document pressure bonding plate 06) at a position corresponding to the reed switch (17). The second
As shown in the figure, when the original pressure bonding plate (16) is closed, the reed switch (17) is turned on by the magnetic force of the Madai-t (18), while as shown in FIG. ) is opened, the reed switch (17) is configured to turn off.

The copying machine (1) that executes copying and copying operations repeats the copying operation a number of times corresponding to the number of copies set by the operator prior to the copying operation, and then repeats the copying operation a number of times corresponding to the number of copies set by the operator before starting the first automatic copying operation. Set the shut timer,
In addition, if the operator performs an operation, for example, an operation to open the document pressure bonding plate (16) while the first auto-shut timer is operating, the first auto-shut timer is reset and the second auto-shut timer is activated. When the next copy start signal is input while the first auto-shut timer or the second auto-shut timer is operating, the copying operation starts immediately, while the first auto-shut timer or the second auto-shut timer When the auto-shut timer expires, the main motor, cooling fan (30), etc. are controlled to stop driving and enter a standby state. Such control is executed by a control circuit shown in FIG. 4, and details of the control will be explained using flowcharts in FIGS. 5 and 6.

Fig. 4 is a circuit diagram C showing an outline of the control circuit, (300) is a CPU that controls the operation of the copying machine (1), and a numeric keypad (301) and a print key (p) on the operation panel (not shown) are shown.
s), a group of operation keys such as the clear stop key (CS), and a fixed position switch (14) that detects the fixed position of the optical system (14).
50), a paper feeding unit (19), a switch (ESl) for detecting paper empty in (20), and a group of detection switches such as CES2), and a decoder (302).
in normal mode via the numeric keypad (301)
It is connected to a display device (303) that displays the numerical value inputted by as the number of copies.

Further, the CPU (300) outputs operation control signals for each motor, clutch, charger, lamp, etc. in the copying machine (1), and controls the above-mentioned operation sequence. (304) via a path line.

FIG. 5 is a flowchart generally showing the control executed by the CPU (300), in which step #1
In this step, the standard operating mode of the copying machine (1) is set. In step #2, an internal timer is set to define the processing time of the CPU (300), that is, the time for one routine of the program. In step #3, input processing of signals from each key, switch, etc. provided on the operation panel (not shown) is performed. In step #4, it is determined whether the state of the copying machine is normal or not. If normal, the process proceeds to step #5, and if abnormal, the process proceeds to step #6.

Step 115 is a subroutine that executes normal copying operation control, the details of which will be explained with reference to FIG. In step #6, if an abnormality such as a jam occurs, processing is performed to immediately stop the operation of the copying machine. In step #7, control signals are output to each element, display section, etc. based on the flags or signals output in steps #5 and #6. In step #8, abnormalities such as jams are detected, display data is processed, and each timer (excluding the internal timer) is counted up.

In step #9, the end of the internal timer set in step #2 is determined, and the length of one routine is defined by looping this process until the end, and when the end is determined, the process returns to step #2 again.

FIGS. 6 1-e are flowcharts showing details of the copying operation control subroutine.

Steps #501 to #507 are print keys (ps)
This is the process when is pressed, step #501 r
Determine whether the print key (ps) is on and proceed to step #5
02 and it is determined that the copy paper is not empty, and when it is determined that the copy start flag (F-1) is "0" in step #503, the main motor, cooling fan (30), The eraser (i) is energized and the exposure lamp (8) is preliminarily lit. In step #505, a timer (TA') for setting the scanning timing of the optical system (14) is set, and the step #
At step 506, the copy start flag (F-1) is set to 0''', and at the same time, the copy end flag (F-3) is set to 0'', and at step II 507, a timer is set to stop the copying machine operation after copying is completed. (T-D), (T-E), (T-F),
(TG), (T-1() is reset.

In step #508, it is determined whether the timer (TA) for setting the scanning timing of the optical system (14) set in step #505 has ended, and if the timer (TA) has ended, the process advances to step #509 to start scanning. Set the flag (F-2) to ゛1''.

Steps #510 to #514 are processing when the optical system (14) starts scanning. In step #510, it is determined that the scan start flag (F-2) is "P1", and in step #511, the F-optical If it is determined that the system (14) is in the normal position, the transfer/separation charger (6) is moved in step #512.
), a corona voltage is applied to the charger (4), the exposure lamp (8) is turned on, the optical system (14) starts scanning, and in step #513, a timer (T-B) for finishing the scan is activated. is set, and the scan start flag (, F-2) is set to "0" in step #514.

Steps It 515 to #519 are processes for stopping the scanning of the optical system (14), and Steps #515
Then, determine whether the scan end timer (T-B) has ended, and if it is determined that the timer has ended, in step #516, turn off the main lighting of the exposure lamp (8) and stop the scan of the optical system (14). , while turning off the charger (4),
In step #517, a timer (TD) for regulating the next copy timing is set. Step $518
r determines whether scanning has been completed the number of times corresponding to the preset number of copies, and if completed, sets the copy start flag (F-1) to 0'' in step #519.

In step #520, the timer (T-D) for regulating the next copy timing set in step #517 is
) is finished, and if it is finished, step #521
Proceed to. In step #521, the copy start flag CF-
It is determined whether or not 1) is 1"C, and if it is "1", that is, in the middle of continuous copying, the exposure lamp (8) is preliminary lit in step It 522, while if it is "0#, that is, copying has ended". Step! In step #523, the first auto-shut timer (TH) is set, and in step #524, the copy end flag (F-3) is set to "1".

Steps II 525 to #529 detect the operator's operation after copying is completed and start the second auto-shut timer (T).
-E), and step group 525 copy end flag (F-3) is "1" and step #526
When it is determined that the original pressure bonding plate (16) is released, the copy end flag (F-3) is set to 0# in step #527.
In step #528, the second auto-shut timer (T-
E), and in step #529, the first auto-shut timer (TH) is reset.

Steps #530 to #539 are the first auto-shut timer (TH) or the second auto-shut timer (T-H).
This is a process of sequentially stopping the operations of the copying machine (1) and placing it in a standby state upon completion of T4). Step #530
When it is determined that the first auto-shut timer (TH) has ended, the copy end flag (F-3) is set to 0'' in step #531 and the process proceeds to step #533, and step #532
The second auto-shut timer is activated. Step #533
Step #534 turns off the transfer/separation charger (6), and in step #534, a timer (
Set T-F).

In step 115.35, a timer (T-F) is set to turn off the eraser (3) set in step #534.
) is completed, and if it is completed, the eraser (3) is turned off in step #536 and step $537't
' Set a timer (T-G) to turn off the main motor) and the cooling fan (30).

Step IT 5387'' determines whether the timer (T-G) for turning off the main motor and cooling fan (30) set in step #537 has ended, and if the timer (T-G) is set in step #537, the main motor (2) is turned off in step #539. and turn off the cooling fan (30).

In step #540, processes other than those described above (for example, paper feeding process, etc.) are executed.

With the above control, for example, when making one copy of each of a plurality of originals, the operator can make a second copy by changing the originals, that is, by opening the original pressing plate (16).
Since the first auto-shut timer is set, even if the first auto-shut timer is set short,
The print key can be pressed while the copying machine is rotating backwards, and the next copy can be started without going into a standby state. Therefore, there is no waiting state every time copying is completed, the copying process is speeded up, and wear and tear on the machine can be minimized.

In the above embodiment, as means for detecting the operator's operation, the original pressing plate (16) is operated by a magnet (18) provided on the original pressing plate (16) and a reed switch (17) provided on the original placing table (15). Although the example of detecting the opening operation of 16) is shown, it is also possible to set the second auto-shut C timer when the operator touches the copying machine by operating a key switch on the operation panel or by using a sensor switch, etc. It's okay.

Effects of the Invention As is clear from the above explanation, the control device for a copying machine according to the present invention has a first auto-shut timer that is set at the timing of the end of copying, and a control device that operates when the first auto-shut timer is operated. The second set by the operation of
an auto-shut timer, a reset means for resetting the first auto-shut timer when the second auto-shut timer is set, and a means for determining termination of the first auto-shut timer or the second auto-shut timer. Since the copying machine is characterized in that it is equipped with a control means that puts the copying machine into a standby state, it is possible to significantly shorten the copying time when making copies one by one from a large number of originals, and also to It has excellent effects such as minimizing mechanical wear and tear on the machine.

[Brief explanation of the drawing]

- Figure 1 is a cross-sectional view showing the schematic configuration of a copying machine that employs the present invention, Figures 2 and 3 are diagrams for explaining means for detecting operator operations, and Figure 4 is a control diagram. FIG. 5 is a circuit diagram schematically showing the circuit, FIG. 5 is a flowchart generally showing the processing executed by the CPU'C, and FIG. 6 is a flowchart showing details of the copying operation control subroutine. 1... Copy machine, 17... Reed switch, 18...
Magnet, 300... CPU0 applicant
Minolta Camera Co., Ltd.yl! Figure 15 Figure 6 (' $6 Figure b

Claims (1)

[Claims] 1. A first auto-shut timer that is set at the timing of the end of copying; a second auto-shut timer that is set by an operator's operation while the first auto-shut timer is in operation; When the second auto-shut timer is set, the first
A copying machine characterized by comprising: a reset means for resetting an auto-shut timer; and a control means for determining the end of the first auto-shut timer or the second auto-shut timer and placing the copying machine in a standby state. Machine control device. 2. The control device for a copying machine according to claim 1, wherein the operator's operation is an operation to open a document pressure plate.