JPS60184266A - Copying machine - Google Patents

Abstract

PURPOSE:To detect a forgetfully left original and to generate a warning by providing a means which irradiates the original with light and detects the original setting state being unchanged for a specific time after copying operation. CONSTITUTION:When a print switch is turned on, light source lamps CL and MFC and an in-copying signal are turned on through a preprocessing stage. Then, the original placed on an original platen is irradiated with light from the light source lamps to form an original image that the irradiation light has on a photosensitive body which is charged electrostatically in advance, and then when stages of development, transfer, and fixation of the formed image (electrostatic latent image) are completed, an optical system which scans on the original platen from its initial setting position and reaches the opposite side of the platen is returned to the initial position. It is decided whether a signal So is present or not and when the signal So is present, the light source lamp CL is turned off and then the process is fed back to a step S1. When the signal So is absent, it is decided whether a timer TM1 clocks a specific time T1 already or not and when so, the light source lamp LC is turned off and a buzzer is allowed to sound.

Description

[Detailed Description of the Invention] <Technical Field> Misfire IJJIIJ: This invention relates to a copying machine, particularly a copying machine equipped with a misplacement warning device (1iii L).

<Prior Art> A document misplacement detection means in a conventional copying machine determines whether or not a document has been left behind based on the open/closed state of a document cover that brings the document into surface pressure contact with the paper table (@
Because of the phase separation 58-29502:), when copying multiple originals in which the original cover is mechanically opened or closed, the original may be forgotten to be placed on the original platen K fi'+'. However, since such a conventional method does not detect the presence or absence of the document itself, it is necessary to place a document larger than the document cover next to the document cover with the document cover closed. Even if it is pulled out from the side (from the side), there is also the problem that the [8] output is slow.

<Object of the Invention> In order to eliminate the above-mentioned drawbacks, it is an object of the present invention to provide a copying machine that detects the misplacement of a document based on the presence or absence of the document itself, and provides a means for issuing a warning.

<Example> The configuration of misfire 1=uj will be described below based on an example.

The copying machine of the present invention uses a wide variety of originals, from thick paper to transparent B11 film, and since the original is fixed on the original table during copying, when the original is left behind, the original is
With a focus on maintaining the undisturbed state of the original placed on the document table, a means is provided to irradiate the original with light and detect that the original placed state has not changed for a predetermined period of time after copying is completed. , I already have that detection. ! : μj (This is a warning that you may have left behind a fortune.) Figure 1 shows a circuit block diagram of a copying machine according to an example of a misfire.

In the figure, 1 is a light receiving element (which is arranged with directivity so that only the light reflected from the original can be received), and this light receiving element 1 is connected to the +911.1 terminal of comparator lake 2. Note that the light receiving element 1 and the comparator 2
A grounded resistor RI is provided between one terminal of the .

The output of the conoscillator 2 is
When the reflected light from Ft^゛, 1 is received and there is a conductor +li of the resistor R1, LowK changes from ll1g1+.

'c, the output terminal of the comparator 2 is electrically connected to another comparator and the input terminal of the comparator 4, and the comparator 3 has a voltage on the terminal 3a side that is +i' higher than the voltage on the one terminal 3b side. In addition, the comparator 4 also makes the '11L voltage on the terminal 4a side higher than the voltage on the one terminal 4b side.

Further, the ten terminals 3aK of the comparator 3 are provided with an integrating circuit (formed by a resistor R2 and a capacitor CI), and similarly, one terminal 4b of the comparator 4 is also provided with an integrating circuit (formed by a resistor R3 and a capacitor CI). C2) was provided. Note that R4, R5, and R6 are resistors for setting a predetermined voltage level, and R7, R8, and R9 are also resistors for setting a predetermined voltage level.

However, if the output of the comparator 3 or the &:J comparator 4 is
The signal enclosed by the broken line is output from the lag detection circuit. ) is input to the microprocessor-5. Based on the signal SO, the microprocessor 5 checks whether or not the original is printed.

In the figure, 6 is a light source lamp (exposure lamp),
The exposure amount is adjusted by a control circuit 7 connected to the microprocessor sensor 5L. Further, a driver male 8 drives an MFC 9 (mirror feed clutch), an MRCIO (mirror return clutch), a buzzer 11, etc. in accordance with control instructions from the microprocessor 50.

84S4 and M S5 I'i switch, and the M
The S4Q is placed on one end of the copying machine's original table, and the MS5 is placed on the other end of the copying machine's original table. When the third optical system reaches the appropriate position, it closes.

When the I' SW is pressed once, the microprocessor 5 issues a RIB command to carry out a predetermined printing process.

Here (, end point A of the comparator 2, 1jfj
Two Q's in Conopalator 3:? a”F 3 a,
3b and its output ψ1111-j'■3, the two terminals 4a, 41) of the comparator 4, and its output A111 and the output waveforms of the child C are shown.

In Figure 2, A, 3a, 8b, B, 4a, 41) and C
I: Ii, the output of the part indicated by the same town υ of the written circuit is in the form d s d d.

As shown in the figure, the output of the comparator 3 (shown as waveform B,
f”, ) becomes LOW when it is detected that there is a document placed on the document table, and the output of the comparator 4 (shown by waveform C) becomes I-ow. This is when the manuscript is removed from the manuscript table.

Next, document detection in this embodiment will be explained using the flowchart shown in FIG.

First, when the print switch is turned on (S).

Step), pre-processing step (S2 step), the light source lamp CL, the MFC and the copying step
This is the O of the light source lamp CL when copying the first document.
A, -? It is. ) is turned on (
53 steps).

In this way, the irradiation light from the light source lamp is applied to the document placed on the document table to form an image of the document on the pre-charged photoreceptor 1-1 (J side light is equalized). When the copying process (step S4) of image development (of the electrostatic latent image) → transfer → fixing is completed, the optical system scans the document table from the initial set position as described in step 11 and reaches the opposite side of the document table. Return to the initial cent position. That is, when MS 5 installed on the opposite side of the manuscript table described in 11a is turned on (Ss step), the MFC is turned off, the MRC is turned on, and the light source lamp CL is turned off. (Ss step). In this way, when you check that the optical system has returned by turning MS4 ON (S, step), the copying process (fi JJ is turned OFF (S, step)) is activated.
Step S), the ready lamp RL is turned on and the timer TMI is reset (Step S9).

This timer TMI is built into the micropro sensor 5. At the same time that the timer TMI starts timing, the light source lamp CL is turned on (normally required for copying) 1 (, 1
Turn on the voltage sufficiently lower than i-1. This is to ensure that the amount of light is not overwhelming.

The copying process is completed at step S9 in item -11, and it is determined whether there is a rifJ message I''!So or not (
Step Sho), if there is a signal 5So, turn off the light source lamp CL, turn off the illumination (step S11). Thereafter, a feed puncture is performed to step 1]0 S1. On the contrary, the signal S.

If there is no timer TMI, the predetermined time T1 is
Determine whether or not the period has elapsed (step S12),
If not, feedback is given to step S, and if so, the light source lamp CL is turned off and the buzzer is sounded (step S13). This buzzer continues to ring for a predetermined period of time 1 to 2 (S
14), then stop the buzzer (S1
5 steps).

Then, the process returns to step Sl of []q.

A person operating a copying machine can recognize that a document has been left behind by the above-mentioned buzzer height.

In the above embodiment, the exposure lamp for copying in the main body of the copying machine is used as the light source for document detection, but it is also conceivable to use a dedicated light source. Specifically, as shown in FIG. 4, LEDs (light emitting diodes) 15.1 are installed at locations where light can be irradiated onto the original 1 of the copying machine main body I2 and the original 14 of the bottle stand I3.
6.

In the figure, 17 is a drum around which a photoreceptor is wound, MS4゜M
S, 5 is the aforementioned switch. In this case, since the detection of the presence or absence of the document opening can be started before the return wJ (operation of scanning and returning to the initial position) of the optical system is completed, the accuracy can be increased by the earlier start time.

Incidentally, as shown in Fig. 5, the detection signal (So' in the figure) is self-effective only when two detection circuits are provided (of course, three or more detection circuits are also possible) and detection outputs are generated simultaneously. This is a technique that can be conceived of by those skilled in the art to increase detection accuracy by configuring it so that.

In other words, it is easy to use a sample hold circuit or the like to detect the state of the light source lamp (exposure lamp) before it is turned on by multiplying the signal by tp.

<Effects> As described above, with the dud copying machine, the presence or absence of the original can be detected by the original itself, so the original 41° can be reliably detected.
, etc. 11- You can prevent forgetting to write 11°1j.

Furthermore, according to my father's copying machine, which failed to fire, if he was copying many manuscripts in a row, he opened the manuscript but was unable to exchange manuscripts due to money disputes with other people. It is possible to prevent the situation in which the same document is duplicated without knowing whether it is correct or incorrect.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram centered on the original detection part of a Sun Tzu copying machine according to an embodiment of the present invention, FIG. 2 is an output waveform diagram of a specific part of the circuit, and FIG. 3 is an implementation of the above-mentioned Misfire 1. For example, a flowchart of a Sun Tzu copying machine according to original detection, FIG. 4 is a simplified structural diagram of a Sun Tzu copying machine according to another embodiment of the present invention, and FIG. FIG. 2 is a circuit diagram of a document detection portion of the machine. CI, C2/capacitor, RI, R2, R3. R4, R5, R6, R, 7, R8, R9 Resistor, 1. Light receiving i element, 2, 3.4...Comparator, 5...Microprocessor-16...Light source lamp (i+i'49 lamp), 7...Light source lamp control circuit, 8...Dry nozzle array, 9...Mirror feed clutch, IO...
Mirror return clutch, 11...buzzer, I2/copying machine main body, 13...document stand, 14...document, 15.
16.LED. (Light emitting diode), 17... Photosensitive drum, 18°1 9, . 4I5 11 circuits. Agent Patent attorney Aihiko Fukushi (and 2 others) No. 1 E4 Fig. 2 214 Fig. 4 R 1ν Fig. 5

Claims (1)

[Scope of Claims] 1. A light source that irradiates light onto a document placed on a document table, a light-receiving element that receives reflected light from the document, and a change in the placement state of the document based on the output of the light-receiving device. A copying machine which has a detection value from a circuit that detects a signal and a detection value from a circuit that is low and also provides an alarm when the output is not opened at a predetermined time after the end of the copying process. 2. The secret feature is that the light source in item 1 is a light source for exposing the manuscript! 71'j Scope of Ice Copying machine according to item 1.