JPH02287461A - Controller for copying machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for a copying machine, and more particularly to a control device for a copying machine characterized by control of determining whether to start a copying operation.

[Conventional technology]

In a conventional copying machine, if the machine is in a state where copying is possible, a copying operation is started by pressing a print key.

[Problem to be solved by the invention]

In the above-mentioned conventional apparatus, since the copying operation is started regardless of the presence or absence of a document, there is a possibility that wasteful copying may occur due to an erroneous operation.

Additionally, on models with automatic paper selection function, if it is determined that there is no original, the copying operation will be temporarily stopped and a warning to "confirm paper size" will be displayed, but after that, the print key will be pressed regardless of whether there is an original. As a result, a copying operation is started, and although the apparatus is improved in terms of wasteful copying compared to the above-mentioned apparatus, it cannot be said to be perfect.

The purpose of the present invention is to prevent the copying operation from starting unless the original is set on the contact glass or automatic document feeder (ADF), and to display a message prompting the reader to load the original when the print key is pressed. An object of the present invention is to provide a control device for a copying machine that can perform the following functions.

[Means to solve the problem]

The above purpose is to use a document detector that detects the document set on the contact glass and the document table of the automatic document feeder, and to output a copy prohibition command and a warning using the document non-detection output from this document detector. This is achieved by including a control means for issuing a display command and a display means for displaying a warning based on the warning display command.

[Effect]

When the document detector detects that no document is set, the control means prohibits the copying operation and causes a warning display to light up intermittently or continuously on the display means.

〔Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of a control device for a copying machine according to the present invention, in which 1 is a document detector which will be described in detail later, 2 is a pressure plate open/close detector, and 3 is a document detector 1, pressure plate open/close detector. Vessel 2
This is a main system 4HCPU (control unit) that takes in signals from etc. and outputs commands to various drivers 4 for performing copy operations. Further, the main body control CPU 3 outputs a warning display, which will be described in detail later, to the display device (display means) 5. Furthermore, the main body control CPU 3 is connected to the ADF control CPU 6 and the optical system side 4.
Serial communication is performed with each CPUUT. 6a and 6b are ADFs that are not built into the main body.
This is an optical fiber for electrically connecting the device to the main body. Briefly, the communication partner is switched depending on the output level of the terminal PC2 of the main body control CPU3. That is, terminal P
If the output of C2 is low level, the optical system control CPU7
If the level is high, ADF system (III C
Communicate with PU 6.

FIG. 12 is a timing chart thereof.

FIG. 2 is a top view of the copying machine, and when the original 8 is set on the contact glass 9 in a copying machine based on the original on the left side, inside the contact glass 9 at a position where each size paper is common and covers the top surface. The original document detector 1 is provided in the document detector 1. ] O is the main body of the copying machine, 11 is the pressure plate that covers the contact glass 9, 12 is the pressure plate opening/closing detector, 13 is the scale, 14 is the print key 15 is the numeric keypad, 16 is the various mode keys 17 is the sheet number display, 18 is the various Display unit, 19 is ready display unit,
20 is a weight display section. Further, the display 5 is adapted to display the message "Please set the original 1".

FIG. 3 is an explanatory diagram showing how a document is detected. The document detector 1, which is a reflective sensor, is set on the optical system base 21 on the back left side in FIG. Then, install the device so that the specularly reflected light from the light emitting section does not directly enter the light receiving section (because the specularly reflected light is reflected by the contact glass 9 more than the original 8, the diffusely reflected light should be allowed to enter the light receiving section). . Note that 22 is a lens.

FIG. 4 is a circuit diagram of the document detector 1, in which the light emitting element 1a
, a light receiving element lb, and a comparator 1c.

Since the light-receiving element 1b receives the diffusely reflected light, the potential of the section a is independent of the presence or absence of the document 8 on the contact glass 9.
Since the power supply voltage level and GND (ground) level are not the same, a comparator IC is used.

FIG. 5 is a detection output waveform diagram of the document detector 1, which shows a low level when there is no document and a high level when there is a document.

In addition, when an ADF (not shown) is installed, the document detector 1 detects the document set on the document table of the ADF, and transmits the detection signal from the ADF control CPU 6 in FIG. 1 to the main body control CPU 3 via serial communication. send.

FIG. 6 is a diagram of the relationship between the pressure plate and the pressure plate opening/closing detector, FIG. 7 is a circuit diagram of the pressure plate opening/closing detector, and FIG. 8 is an output waveform diagram thereof. When the switch is turned on, it becomes on (high level), and when it is opened, it is opened and becomes off (low level).

FIG. 9 is a flowchart related to the document set check, in which the presence or absence of the document 8 on the contact glass 9 is checked by the document detector 1 with the pressure plate 11 or the ADF released from the contact glass 9. This figure shows a method for checking the presence or absence of two types of originals, in which a signal from the ADF control CPU 6 is checked by serial communication to see if an original 8 is set on the original table (not shown).

First, when document 8 is set on the document table of ADF (1-1
), “ADF original set flag is turned on (9-2).

This "ADF document set flag turns off when the document is removed from the document table (N at 9-1) and the document detector 1 determines that there is no document (N at 9-3), that is, when the ADF is opened ( 94).To explain how to use this flag, in step 9-2, if you turn on the "ADF original set flag 1," the "original set flag is turned on (9-5)." This means that the original 8 has been set on the original table of the ADF. in this case,
The display 5 turns off the message "Please set original 8" (9-6). When the original 8 set on the original table is removed, the message "ADF original set flag on" turns off (9-6).
(Y at 9-7), the process advances to step 9-8, and "Turn off the document set flag.

In addition, when the original 8 is set on the contact glass 9, it is determined that there is no original 8 in the ADF and that the original detector 1 has detected the presence of the original (9-1.9-3
), then determine whether the ADF document set flag is off (N at 9-7), and then determine whether the pressure plate 11 is open or closed (
9-9).

The reason why the opening and closing of the pressure plate 11 is checked is because the pressure plate 11 or the conveyor belt of the ADF (not shown) is white, so it is difficult to distinguish it from the original 8. Alternatively, the presence or absence of the document 8 must be checked with the ADF open.

Therefore, the pressure plate opening/closing detector 12 prevents any processing from occurring when the pressure plate is between the pressure plates. and pressure plate 11
When it is in the open state, the process proceeds to step 9-5, where the "original set flag" is turned on, and the no-document warning display is turned off at step 96.

FIG. 10 is a flowchart regarding the copy start check, in which the copying machine is in a standby state, that is, in the second
When the ready display section 19 shown in the figure is lit (10
-1: Y) Processing is performed when the print key 14 is pressed (10-1: Y). As explained in Figure 9,
If the original 8 is set and the "original set flag is on" (Y at 10-3), copy start processing is performed (1 (14)), and in order to check the setting status of the next original, the "ADF Turn off the original set flag (105.1O-6). Also, if the original set flag is off (N at 10-3), the display 5 is turned on without performing a copy operation. Displays a warning.

FIG. 11 is a flowchart regarding warning display,
After displaying the warning "Please set the original" on the display 5 (Y at 11-1), the display timer determines whether a predetermined time has elapsed, and after that time (Y at 11-2) the display H5 is displayed. The light goes out (11-3). Further, when the display 5 is off (N at 11-1), the display timer is only cleared (11-4). If the display 5 is lit, the timer is incremented by +1 until the display timer times out (N at 11-2, 115). Note that the warning display process is performed not only in the above embodiment but also when the display 5 is turned on.
Even when the document set flag ° is turned on, it is sufficient to simply turn it off.

〔Effect of the invention〕

As described above, according to the present invention, the control is performed so that copy processing cannot be performed unless the original is set, and a warning is displayed if the original is not set, so it is possible to prevent the occurrence of wasted copies due to erroneous operations, and It is possible to provide a control device for a copying machine that allows the copying machine to be user-friendly.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of a control device for a copying machine according to the present invention, FIG. 2 is a top view of the copying machine, FIG. 3 is an explanatory diagram showing how a document is detected, and FIG. 4 is a document detector. Figure 5 is the output waveform diagram of the circuit shown in Figure 4, Figure 6 is a diagram of the relationship between the pressure plate and the pressure plate open/close detector, Figure 7 is the circuit diagram of the pressure plate open/close detector, and Figure 8 is the circuit diagram of the pressure plate open/close detector. FIG. 9 is an output waveform diagram of the circuit shown in FIG. 7; 10 and 11 are flowcharts of each subroutine, and FIG. 12 is a timing chart of serial communication between the CPUs shown in FIG. 1. 1... Document detector, 3... Main unit control CPU, 5...
・Display unit, 8... Original, 9... Contact glass. Figure Figure Figure 4 Figure 7 Figure 8 Figure

Claims (1)

[Claims] A document detector detects the document set on the contact glass and the document table of the automatic document feeder, and the document detector outputs a document non-detection output to output a copy operation prohibition command and issue a warning display command. A control device for a copying machine, comprising a control means and a display means for displaying a warning based on a warning display command.