KR920004352B1 - Papers jamning automatic removing method - Google Patents

Abstract

When a paper is jammed within a copy machine, a sensor detects the position of the jammed paper, and the position is displayed. If the position of the jammed paper is placed at the outside of a cleaner, the jammed paper is ejected to the outside of the machine by forwardly driving a main motor, and then, the jam display is terminated to return the copy machine to the normal operation. If the jammed position is placed inside the cleaner, the jammed paper is taken out from the cleaner by driving the main motor reversely, and then, the paper is ejected to the outside of the copy machine by driving the main motor forwardly. Then the display is terminated, and the machine is restored to the normal operation.

Description

How to Clear Paper Jams Automatically

1 is a schematic diagram of a copier.

2 is a conventional block diagram.

3 is a conventional flow diagram.

4 is a block diagram to which the present invention is applied.

5 is a flow chart according to the present invention.

* Explanation of symbols for main parts of the drawings

6: paper guide film 15: exit roller

16: cleaner 20, 30, 40, 50: the first to fourth sensors

60: microcomputer 70: display unit

80: main motor drive unit 90: main motor

100: conveying unit 200: fixing unit

The present invention relates to a method for automatically eliminating copy paper jams, and more particularly, to a method of automatically removing paper by controlling the main motor drive when a paper jam occurs in an electrophotographic copying machine.

In general, an electrophotographic photocopier is the same as the first tile, and when the paper mounted on the paper cassette 4 is fed to the roller at a proper time in the normal operation, the paper is supplied to the paper guide film 6. It is guided by to turn on the first sensor (20) and stopped in the resistor roller (7). On the other hand, the photosensitive drum 1 is rotated in the direction of an arrow A, charged by corona discharge of the charger 2, and then exposed to a debt reflected from the original. Therefore, an electrostatic latent image is generated in the photosensitive drum 1, wherein the latent image is rotated in accordance with the time at which the latent image is passed through the developing device 3, and the paper is transferred through the guide plate 8 to the transfer machine. And the visible image on the photosensitive drum 1 is transferred to the sheet by the action of the transfer machine 8.

At this time, the paper is in close contact with the photosensitive drum 1 by the electrostatic force and the separator 10 serves to separate the close contact with the paper. Thereafter, the separated sheets are conveyed to the fixing unit 200 by the conveying roller 11 and the conveying belt 12 of the conveying unit 100. At this time, the second sensor 30 is turned on when the paper reaches the front end of the conveying unit (100).

Meanwhile, when paper is transferred to the fixing unit 200, the unfixed toner on the paper is fixed by the heat of the heat roller 13 and the pressure of the pressure roller 14, and the toner-mounted paper turns on the third sensor 40. Passing through the discharge roller 15 is discharged to the outside of the copier, one copy is completed. On the other hand, residual toner is present on the photosensitive drum 1 after the transfer has passed (9), where the toner is removed by the cleaner 16. On the other hand, if a paper jam occurs inside the copier for a predetermined cause, the copier stops copying and stops, and the micro-computer 22 of FIG. 2 detects the location of the jam. In FIG. 1, the state of the first sensor 20 located in the paper guide film 6 of FIG. 1 is read to determine whether the first sensor 20 is in an on state.

If the first sensor 20 is not in the ON state in step 21, the process proceeds to step 22 to read the state of the second sensor 30 located in the conveying part 100 of FIG. ) To determine whether it is on. If the second sensor 30 is not in the ON state in step 22, the process proceeds to step 23 where the fourth sensor 50 is read by reading the state of the fourth sensor 50 located in the cleaner 16 of FIG. Judge whether or not. If the fourth sensor 50 is not in the ON state in step 23, the process proceeds to step 24 where the position of the third sensor 40 located between the fixing unit 200 and the discharge roller 15 of FIG. In the display unit 26 of FIG. 2, a third paper jam state indicating that a paper jam has occurred is displayed so that the user can recognize the paper jam position and remove the paper.

On the other hand, if the first sensor 20 is turned on in step (21), the process proceeds to step (28), where the first paper jam state indicating that a paper jam occurs at the position of the first sensor 20 is shown in FIG. Displayed at (26) allows the user to recognize the paper jam position and remove the paper. In addition, if the second sensor 30 is in the ON state in step 22, the process proceeds to step 29, where the second paper jam state indicates that a paper jam occurs at the second sensor 30 position. Displayed at (26) allows the user to recognize the paper jam position and remove the paper. If the fourth sensor 50 is turned on in the step (23), the process proceeds to the step (30) to display the fourth paper jam state indicating that a paper jam has occurred at the fourth sensor 50 position. Displayed at (26) allows the user to recognize the paper jam position and remove the paper.

On the other hand, if the paper jam position is displayed on the display 25 of FIG. 2 in steps 24, 28, 29, and 30, the process proceeds to step 25 to determine whether the paper jam is removed. . If the paper jam is removed in step 25, the process proceeds to step 26 to stop the paper jam state display of the display unit 25 of FIG. 2 and proceeds to step 27 to allow the copier to operate normally and ends. On the other hand, if the paper jam has not been removed in step 25, the process proceeds to step 31 so that the paper jam state is continuously displayed by the display unit 25 of FIG. 2 and looped in step 25.

As described above, when a paper jam occurs, the conventional electrophotographic copying machine has a problem that a user needs to recognize a paper jam state to be displayed and remove the paper directly. In addition, when the paper jammed paper is removed from the position before reaching the fixing unit, there is a defect that the user may get unfixed toner on the user's hand or the unfixed toner may fall inside the copier, causing contamination. Accordingly, an object of the present invention is to provide a method for automatically removing a paper by controlling a main motor drive by detecting a paper jam occurrence position when a paper jam occurs in an electrophotographic copying machine.

In order to achieve the above object, the present invention provides a first process of displaying a position of a sensor that detects a paper jam by detecting a paper jam position pole by a sensor state of a predetermined mouth installed at a predetermined position of the copier when a paper jam occurs. And, when the paper jam position detected in the first step is outside the cleaner, a second step of rotating the main motor forward to discharge the jammed paper to the outside of the copier, stops the display of the paper jam state, and operates the copier normally; When the paper jam position detected in step 1 is inside the cleaner, the main motor is reversed to remove the jammed paper from the vacuum cleaner, and then the main motor is rotated forward to discharge to the outside of the copier, the paper jam state display is stopped, and the copier operates normally. Characterized by the process.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram of a copying machine to which the present invention is applied, as described above.

2 is a block diagram showing a conventional paper jam state display.

3 is a conventional flow chart as described above.

4 is a block diagram of automatic paper jam removal to which the present invention is applied. The first sensor for detecting a paper jam is located in the paper guide film 6 of FIG. Located between the second sensor 30 to detect a paper jam, the fixing unit 200 and the discharge roller 15, the third sensor 40 and the cleaner 16 to detect the discharge of the paper. The fourth sensor 50 for detecting the jam, the microcomputer 60 for determining and processing the jam state by reading the states of the first to fourth sensors 20, 30, 40, and 50, and the paper jam The display unit 70 for displaying a paper jam state by the microcomputer 60, the main motor driver 80 controlled by the microcomputer 60, and the main motor driver 80 when a paper jam occurs. It consists of a main motor 90 to be rotated forward or reverse to remove the jammed paper.

5 is a flow chart according to the present invention.

An operation example of FIG. 5 according to the present invention will now be described in detail with reference to FIGS. 1 and 4. If a paper jam occurs inside the copier for a predetermined cause, the copier stops copying and stops. In step 51 of FIG. 5A, the microcomputer 50 of FIG. 4 detects the location of the paper jam. The state of the first sensor 20 located at (6) is read to determine whether the first sensor 20 is in an on state. If the first sensor 20 is not in the ON state (51), the process proceeds to (52) to read the state of the second sensor 30 located in the conveying unit 100 of FIG. ) To determine whether it is on.

If the second sensor 30 is not in the ON state (52), the process proceeds to (53) to read the state of the fourth sensor 50 located in the cleaner 16 of FIG. Judge whether or not. If the 4 sensor 50 is not in the ON state in step 53, the process proceeds to step 54 where the paper is placed at the position of the third sensor 40 located between the fixing unit 100 and the discharge roller 15 of FIG. The third paper jam state, which indicates that the jam has occurred, is displayed on the display unit 70 of FIG. 4 and the flow proceeds to step 56a to perform the paper jam A routine of FIG. 5b.

On the other hand, if the first sensor 20 is in the on state (54d) in step (51), the first paper holding state indicating that a paper jam occurs at the position of the first sensor 20 is displayed in FIG. 70) and read the state of the fourth sensor 50 in step 55 to determine the main state of the fourth sensor 50, and if not in the on state (56a), proceed to step 56a. Perform Jam A routine.

If the fourth sensor 50 is turned on in step 55, the process proceeds to step 56b to perform the paper jam B routine of FIG. 5C. In addition, if the second sensor 30 is in the ON state in step 52, the process proceeds to step 54a to indicate that a paper jam occurs at the position of the second sensor 40 located in the conveying part 100 of FIG. The second paper jam state is displayed on the display unit 70 of FIG. 4 and the process proceeds to step 56a to perform the paper jam A routine of FIG. 5b.

If the fourth sensor 50 is turned on in step 53, the process proceeds to step 54C, where the paper jam occurs at the position of the fourth sensor 50 located in the cleaner 16 of FIG. 4 The paper jam state is displayed on the display unit 70 of FIG. 4 and the process proceeds to step 56b to perform the paper jam B routine of FIG. 5C. On the other hand, the paper jam A routine is performed in step 56a, and the main motor 90 is rotated in the direction of the arrow A in FIG. 1 by controlling the main motor driver 80 of FIG. 4 in step 61 of FIG. The first sensor 20 or the second sensor 30 or the third sensor 40 in the position so that the paper jam occurs paper is discharged to the outside of the copier and proceeds to step 62. In step 62, the third sensor 40 is turned on by reading the state of the third sensor 40 and determining whether the third sensor 40 is turned off by completely discharging the paper after the third sensor 40 is turned on. If it is off again, the process proceeds to step (63).

Therefore, since the paper is discharged to the outside of the copier, the main motor driving unit 80 is controlled in step 63 to stop the forward rotation of the main motor 90 and return to step 57. In step 57, the display of the first paper jam state, the second paper jam state, or the third paper jam state of the display unit 70 of FIG. 4 is stopped, and the flow proceeds to step 58. In step 58, the copier is normally operated and terminated. In addition, if the third sensor 40 is not turned off after being turned on in step 62, the process repeats the above-described process by looping to step 61. On the other hand, the paper jam B routine in step 56b is performed by rotating the main motor 90 in the direction of arrow B of FIG. 1 except for the main motor driving part 80 of 4 degrees in step (71) of FIG. 5C. The paper jam occurs at the position of the fourth sensor 50 to exit the cleaner 16 and proceeds to step 72.

In step (72), if the second sensor 30 is not in an on state by reading whether the second sensor 30 is in an on state in order to detect whether the paper is ejected from the cleaner 16 and is in the conveyance unit 100. Looping to step 71 repeats the above process. If the second sensor 30 is in the ON state in step 72, the paper is pulled out from the position of the fourth sensor 50. Therefore, the process proceeds to step 73 to control the main motor driving unit 80 of FIG. Rotate 90 in the direction of arrow A in FIG. 1 to allow the paper to be discharged out of the copier, and proceed to step 74.

In step 74, the third sensor 40 reads the state of the third sensor 40 and determines whether the third sensor 40 is turned off by completely discharging the paper after the third sensor 40 is discharged. If it is turned off and then turned off, the flow proceeds to step (75). Therefore, since the paper is completely discharged to the outside of the copier, the main motor driving unit 80 is controlled in step 75 to stop the forward rotation of the main motor 90 and return to step 57. In step 57, the display of the fourth paper jam state of the display unit 70 of FIG. 4 is stopped, and the flow proceeds to step 58. In step 58, the copier is normally operated and terminated. In addition, if the third sensor 40 is not turned off after being turned on in step (74), the process is repeated by looping to step (73). Therefore, when a paper jam occurs, the paper is automatically removed and discharged to the outside of the copier.

As described above, the present invention provides a method for automatically removing a paper by detecting a paper jam occurrence position, displaying a paper jam state, and rotating the main motor forward or reverse in the electrophotographic copying machine. There is an advantage that does not have to be removed. In addition, it is possible to prevent unfixed toner on the user's hands or to contaminate the inside of the copier by the unfixed toner.

Claims (1)

In the copy paper jam operation removal method of the copier, when a jam occurs, the position of the sensor that detects the paper jam is detected by detecting the paper jam position by a predetermined number of sensor states installed at a predetermined position of the copier. And a second process of discharging the jammed paper to the outside of the copier, stopping the display of the paper jam state, and operating the copier normally when the paper jam position detected in the first process is outside the cleaner. And, when the paper jam position detected in the first process is inside the cleaner, the main motor is reversed to remove the jammed paper from the vacuum cleaner, and then the main rotation is performed to discharge the outside of the copier, stop the display of the paper jam state, and operate the copier normally. Copy paper jam automatic removal method characterized in that consisting of a third process.

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