JPS6124287B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device in an apparatus that forms an image on a sheet of paper, such as a copying machine or a recording machine.

Generally, conventional copying machines are small, and if a jam occurs inside the copying machine, the number of sheets that will become jammed inside the copying machine is a small number, about one or two.
It was extremely easy for the operator to remove the jammed paper and the miscopied paper from inside the copying machine, release the jammed state, and restart and continue copying.

However, as copying machines have become more multi-functional and sophisticated these days, their internal structures have become more complex and larger, and they have become capable of making continuous copies of a large number of sheets. As a result, the number of sheets passing through the machine is large, making it easy for jams to occur, and when jams occur, a large number of copy papers become jammed inside the machine. If the jam occurs, when the operator removes the jammed paper and miscopied paper inside the jam, the operator restarts copying with some of the paper remaining.
There was a risk that it would cause jamming again.

In order to eliminate the above-mentioned drawbacks, the present invention displays the number of sheets of copy paper present in the copying machine on the display panel of the copying machine during copying operation or when jamming. As a result, the condition inside the aircraft can be inspected and even if a jam occurs, it can be prevented from occurring again.

By the way, today's copying machines are on the verge of becoming more complex on their display panels as they become more multi-functional and sophisticated. Therefore, adding an additional display to the display for the number of copies set and the number of copies completed will further complicate the display panel and make operation of the copying machine more difficult.

The present invention prevents the display panel from becoming cluttered by reusing a specific display (for example, displaying the set number of copies) to display the number of sheets of miscopied paper in the event of an abnormality such as a copying machine or jam in the machine. It is.

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

FIG. 1 is a schematic cross-sectional view of an example of a copying machine to which the present invention can be applied. Secondary charger, 4 is a lamp, 5 is a document table, 6 is a modulation charger, 7 is an insulated drum, 8 is a developer, 9 is a roller that feeds the transfer paper 10, 11 is a transfer charger, 12 is a conveyor 13 is a fixing roller, and 14 is a tray.

The document on the document table 5 is subjected to slit exposure while moving the lamp 4 and the mirror 15, and the primary charger 2
An electrostatic latent image is formed on a rotating so-called three-layer screen 1 which is charged by a secondary charger and simultaneously exposed to light. The primary latent image is used to form a secondary electrostatic latent image on the surface of the insulating drum 7 by the modulation charger 6, and the secondary image is developed by the developer 8. The toner image is transferred to a transfer paper 10 by a charger 11, the paper 10 is conveyed, the toner image is fixed by a fixing device 13, and the toner image is transferred to a tray 10.
Discharge to 4. Even after the secondary latent image is formed, the primary latent image does not disappear, so the screen 1 is further rotated and the charger 6 continuously forms the secondary latent image, and the transfer paper is sent to the transfer section one after another, and the transfer paper is transferred. Fixation and discharge continue.

In this case, three to four sheets of transfer paper are being conveyed from the paper feed roller 9 to the tray 14.
Note that 16 is a lamp for eliminating electricity from the screen, and 17 is a cleaning section for removing toner from the insulating drum 7.

FIG. 2 is a plan view of the operation panel of this device, in which 21 is a button for starting copying, 22
Numeral 25 is a key for setting the number of sheets, 25 is a key for displaying the number of sheets in the machine, 23 is a so-called 7-segment three-digit sheet number display, and 24 is a jam location display.

This jam indicator 24 has light emitting diodes A to I at locations corresponding to the positions of paper detectors a to i provided in the paper path in FIG. 1, and displays the location of the jam.

The sheet number display 23 displays the number of sheets in the machine when the key 25 is turned on, and also displays the number of sheets remaining in the path when a jam occurs and a jam alarm.

Next, the circuit will be explained with reference to FIG.

In the figure, 31 is a number selector that generates a number signal from the key 22, 32 is an encoder that converts the signal (3-digit decimal number) input from the number selector 31 into a BCD signal (binary coded decimal signal), and 36
33 is a group of AND gates that control the output of the encoder 32, and 33 is a paper feed signal for copying generated by the operation of the paper feed roller (abbreviated as a switch). 34 is a copy paper notification detector (h or i in Figure 1) installed at the copy paper outlet of the copying machine, 35 is a counter capable of addition and subtraction, and the addition input terminal UP receives the paper feed signal 33. is applied, and an exit paper passing signal 34 is applied to the subtraction input terminal DOWN. Therefore, the output of the counter 35 indicates the number of copy sheets (in case of a jam, the number of sheets of paper jammed) in the copying machine during the copying process (one-digit BCD signal). 37 is a group of AND gates that control the output of the counting device 35; 38 is a group of OR gates that outputs a set number of sheets or a number of jammed sheets; 40 is a decoder that converts the output signal into an energization signal for the segment of the display 23; 41 is a jam detector (abbreviated as a switch numbered from 1 to 9); for example, No. 3 is near the timing roller, No. 4 is near the paper separation section, and No. 8 and 9 are near the discharge port. . Reference numeral 43 denotes a jam reset signal (abbreviated as a switch), which is generated when a jam occurs and the jam is cleared. 45 is the normal set.
In the reset flip-flop, the jam detector signal is connected to the set input terminal, and the jam reset signal is connected to the reset input terminal. Therefore, when a jam occurs, the output Q outputs a logic level 1, and in a normal state when the jam is released, the output Q outputs a logic level 1. Therefore, when the copying machine is operating normally, the output of flip-flop 45 is connected to the AND
The output of the gate group 36 is displayed on the display 23, and in the case of a jam, the output of the AND gate group 37 to which the output Q is connected is displayed on the lower one digit of the display 23. At this time, the output Q is directly input to the decoder for the upper two digits, and is converted into characters or symbols for displaying the number of miscopied copies at the time of jam.

For example, a case will be explained in which a copying machine jams up to four sheets of paper when it jams, and the fifth sheet jams when attempting to copy 10 sheets.

First, the operator operates the sheet number selector 31.
When set to 10, the signal passes from gate 36 to gate 38 and is sent to display 23 by decoder 40.
010 is displayed. Next, copying starts and paper feed signal 3
When 3 is input to the addition terminal of the counter 35, the output of the counter 35 increases as 1-2-3-4 as a BCD signal, and when the first paper is ejected from the ejection port, the exit passing signal is input to the counter 35. is input to the subtraction terminal of , and the output changes as 1-2-3-4-3.

Therefore, the change in the output of the counter 35 when copying is performed normally is 1-2-3-4-3-4-
3-4-3-4-3-4-3-4-3-4-3-
It becomes 2-1.

However, during normal copying operation, the output of the counter 35 does not pass through the gates 37 and 38 because the logic level 0 signal of the output Q of the flip-flop 45 is input to one input terminal of the AND gate group 37. After the fifth copy paper is fed,
There is a jam near the paper separation section, and the jam detector No.2
Assuming that the copying machine stops operating due to the generation of the jam signal, the flip-flop 45 is set, and when its output Q is inverted, the gate 3
6 is closed and gate 37 is opened. At this time, the output of the counter 35 continues to output 3 as a BCD signal, and the signal passes through the gates 37 and 38 and is displayed on the lower one digit of the display by the decoder 40.

Further, the output Q of the flip-flop 45 is directly input to the decoder 40 as it is, encoded into preset P and -, and displayed on the upper two digits of the display 23. Therefore, the jam alarm P-3 and the number of sheets of miscopied paper that are jammed are notified to the operator. Next, the operator removes the three sheets of miscopied paper indicated by the display, returns the copier to its normal state, and generates a jam release signal using the jam release switch.
5 is reset, the output Q, is inverted again, the gate 37 is closed, and the gate 36 is opened, so that the original set number of sheets 010 is displayed on the display 23 again.

Note that No. 1 to No. 9 of the jam discriminator 41 correspond to paper detectors a to i in FIG. When the paper passes through the passage normally, pulses are generated at regular intervals in order, taking into account the time when the paper passes through each of the detectors a to i, and if there is no paper detection signal from the detectors a to i at the time of the pulse, a jam occurs. The discriminator 41 turns on to notify that there is a jam as described above. At the same time, any of the light emitting diodes A to I can be turned on to display the jammed location. This diode A
It is also possible to provide ~I along the passage inside the device so that it can be observed when the door of the device is opened.

Next, a circuit for displaying the number of sheets in the machine during a copying operation using the key 25 will be explained.

In FIG. 3, numerals 46, 47, and 48 are inverters and differential circuit buffers for setting the flip-flop 45 when the key 25 is turned on and resetting it when the key 25 is turned off.

When the key 25 is turned on, the input to the terminal of the flip-flop 45 changes from 1 to 0, so 1 is output from the Q output of the flip-flop 45, and the number of sheets at that time is displayed as described above. key 25
When turned off, the input signal to the terminal changes to 1 and 0, so the display is switched to display the original number of sheets set.

In FIG. 3, there are 12 lines (4 bits x 3 digits) from 32 to 38 and 35 to 38, and 7 lines for each digit from 40 to 23.

As described above, the present invention is capable of displaying the number of conveyed materials existing in the passage while the apparatus is operating, so that the movement status of the conveyed materials can be viewed and jamming of the conveyed materials can be prevented.

In addition, when an abnormality such as a jam occurs, it is displayed, so that abnormalities such as discharging conveyed material remaining in the passage due to an abnormality in the device such as a jam can be completely handled. I can do it.

Also, by reusing the display to display the number of copies,
Since this display is made, the operating section of the device can be kept simple regardless of the increased functionality.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a copying machine having a display device of the present invention, FIG. 2 is a display and operation section of the copying machine example of FIG. 1, and FIG. 3 is an example of a circuit in the display device of the present invention. In the figure, 22 is a sheet number key, 23 is a numerical display, and 41 is a jam detector.

Claims (1)

[Scope of Claims] 1. An apparatus that performs image processing using a conveyed material, comprising: a feeding means for feeding the conveyed material to the apparatus, a discharge means for discharging the conveyed material from the apparatus, and the conveyed material. an abnormality detection means for detecting a conveyance abnormality in a conveyance path along which the conveyed material is conveyed; a detection means for counting the number of conveyed materials existing in the apparatus, a setting means for setting the number of conveyed materials to be subjected to image processing by the apparatus, a display means capable of displaying the number of the set conveyed materials; when a conveyance abnormality is detected by the abnormality detection means, the conveyed materials present in the apparatus detected by the detection means; A display device comprising display switching means for displaying the number by switching the display operation of the display means. 2. The display device according to item 1, wherein after the abnormality is resolved, the display means is switched again to display the original numerical value. 3. The display device according to item 1, further comprising position indicating means for instructing a user of the abnormal position on the conveyance path in the apparatus based on the abnormality detection signal from the abnormality detection means.