JP2703836B2 - Image forming device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to control of jam data required for maintenance and inspection of an image forming apparatus such as a copying machine.

[0002]

2. Description of the Related Art In a conventional image forming apparatus such as a copying machine, a jam detecting sensor is provided in a paper conveying path in the apparatus, a jam is detected by the jam detecting sensor, and a jam occurrence location is detected based on the detection signal. The message was displayed and the operation of the copier was stopped.

[0003] These conventional devices are intended to allow a user to know the location of the jam and easily remove the jammed paper when the jam occurs.

[0004]

Since the above-mentioned prior art is not for a serviceman to obtain necessary information at the time of maintenance and inspection, the serviceman himself / herself confirms a jam occurrence situation to a user of the copying machine. Or had to make copies to actually recreate the jam.

[0005]

According to a first aspect of the present invention, there is provided a jam detecting sensor for detecting a jam in a sheet conveying path, and the jam detecting sensor according to the first embodiment. Jam determination means (2a) for determining whether or not a jam has occurred based on a signal from the apparatus; and jam cause determination means (2c) for determining the cause of the jam based on a signal from the jam determination means (2a). A jam counter (2b) for counting the number of jams that have occurred between the current number of copies and a predetermined number of times before, based on a signal from the jam determination means (2a). A cause-specific jam counter (2) that counts the number of times of jam for each cause that has occurred between the current number of copies and a predetermined number of times before based on a signal from the jam cause determination means (2c). ) And, the jam counter (2b)
A cause-specific jam occurrence rate calculating means (2e) for calculating a cause-specific jam occurrence rate from the current number of copies to a predetermined number of times based on the data of the cause-specific jam counter (2d) and the data of the cause-specific jam counter (2d); the cause-specific jam occurrence rate calculating means (2e) by the operation data and a preset jam occurrence rate of the reference value and cause-specific jam rate comparison determining means for determining by comparing (2f), display instruction unit Is
Display means (4) for displaying data of the cause-specific jam occurrence rate based on the result of the comparison judgment by the cause-specific jam occurrence rate comparison / judgment means (2f) in accordance with an instruction of the operation key 3 .

[0006] Claim 2 of the present invention includes a jam detection sensor (1) for detecting the jamming of the sheet conveying path, whether a jam has occurred based on a signal (1) from the jam detection sensor In the image forming apparatus provided with the jam determining means (2a) for determining the jam, and the jam cause determining means (2c) for determining the cause of the jam based on the signal from the jam determining means (2a) , A jam counter (2b) that counts the number of jams that have occurred between the current number of copies and a predetermined number of times before based on the signal from 2a), and a signal from the jam cause determination unit (2c). A cause-specific jam counter (2d) that counts the number of jams for each cause that has occurred between the current number of copies and a predetermined number of times before, and a cause-specific jam counter (2d). ) And data with a preset reference value and cause-specific jam data comparison determination unit determines by comparing the (2 g), instruction of operation keys is a display instruction unit (3)
Based on the result of the comparison judgment by the above-mentioned cause-specific jam data comparing and judging means (2g), the cause-specific jam counter (2
and d) display means for displaying the data of d).

According to the image forming apparatus described above, the display
Since the jam occurrence accordance with an instruction from the instruction means it is possible to accurately grasp, maintenance by a service person, it is possible and the child that is responsible for inspection quickly and accurately.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a schematic configuration of a copying machine according to the present invention. FIG. 2 is a main part configuration diagram of the operation panel unit of the copying machine according to the present invention. FIG. 3 is a control flowchart of the copying machine according to the present invention. FIG. 4 is a control block diagram of the copying machine according to the present invention.

First, the configuration of a copying machine according to the present invention will be described. Reference numeral 11 denotes a main body of the copying machine. A document cover 12 is provided on an upper surface of the main body, and a photoconductor 13 is provided at a substantially lower center thereof. Around the photoconductor 13, the main charger 14, the exposure device 1
5, a developing device 16, a transfer charger 17, a cleaning device 18, and a discharging lamp 19 are sequentially provided. Reference numeral 20 denotes a paper transport path, and the copying machine main body 11
For example, it is provided so as to be vertically separable about a pivot provided on the fixing and discharging side. Paper transport path 2
The paper feed tray 21 and the paper feed roller 22 are provided on the paper feed side of No. 0.

The paper feed tray 21 and the transfer charger 17
And a paper feed detection sensor 1 that detects a paper jam in the paper feed unit.
a and the paper stop roller 23, from the transfer charger 17 to the paper discharge side, a peeling detection sensor 1b for detecting a jam at a peeling portion, a fixing device 24, a paper output detecting sensor 1c for detecting a jam at a fixing paper output portion, and a paper discharging. Trays 25 are sequentially provided.
The operation panel 26 is provided with various keys such as a display unit 4 for displaying copy conditions, jam data, and the like, and a jam cause key 3.

Here, the copying process of the copying machine will be described. First, the surface of the photoconductor 13 is uniformly charged by the negative corona discharge of the main charger 14,
Subsequently, the light image of the original is conveyed to the photosensitive member 13 by the converging light transmitting member 15b using the copy lamp 15a of the exposure device 15 as a light source.
An image is formed thereon to reduce the resistance value of a portion exposed to light, thereby removing negative charges. As a result, an electrostatic latent image is formed on the surface of the photoconductor 13. Next, the electrostatic latent image on the photoconductor 13 is visualized by the developing device 1b. The visualized image on the photoconductor 13 is transferred to the paper conveyed from the paper feed tray 21 through the paper conveyance path 20 by the discharge of the transfer charger 17 at the timing of copying. The sheet after the transfer is conveyed to the fixing device 24 and is heated and pressurized and fixed, and then is discharged to a discharge tray 25.

On the other hand, the residual toner on the photoconductor 13 is removed from the photoconductor 13 after the transfer by the cleaning device 18, and then the residual charge on the photoconductor 13 is removed by the discharging lamp 19. Thereafter, the above-described transfer cycle is repeated for each transfer. Next, jam detection will be described. Detection signals from the jam detection sensors 1a, 1b, and 1c provided at the three positions on the paper transport path are transmitted to the control unit 2, and the jam determination unit 2a in the control unit 2 determines whether a jam has occurred. Is done. For example, when a paper jam occurs in the paper feed unit, the paper feed roller 22 feeds the uppermost sheet of the paper stored in the paper feed tray 21 and then feeds the paper within a predetermined time. Paper detection sensor 1a
If is not turned on, it is determined that a jam has occurred.

In the case of a jam at the peeling section, it is determined that a jam has occurred unless the peeling detection sensor 1b is turned on within a predetermined time after the paper stop roller 23 is turned on.

If the paper ejection detection sensor 1c is not turned on within a predetermined time after the peeling detection sensor is turned on, it is determined that a paper jam has occurred in the paper ejection portion.

Next, the control flow will be described with reference to FIGS. First, in step n1, a jam determination is performed by the jam determination unit 2a. As a result of the jam determination, when it is determined that a jam has occurred, the process proceeds to step n2, where the jam has occurred from the current number of times of copying to a number of times before the predetermined number of times of copying, for example, 1000 times before. The number of times is calculated and the jam counter 2b
Is counted up. The jam counter 2b is incremented each time a jam occurs regardless of the cause of the jam. If it is determined in step n1 that no jam has occurred, the process proceeds to step n12.

When the jam counter 2b counts up, the process proceeds to step n3, where it is determined by the jam cause determining means 2c whether or not the cause of the jam is a preset paper source (cause 1). If it is determined that the jam has occurred in the paper feeding unit, the process proceeds to step n4, where the number of jams of the cause 1 of the jam that has occurred from the current number of copies to a predetermined number of times before is calculated by the cause-specific jam counter 2d. It is counted up. Then, the process proceeds to step n5, where the jam occurrence rate calculating means 2e calculates the jam occurrence rate of the jam cause 1 based on the data of the jam counter 2b and the data of the jam counter 2d.

If it is determined in step n3 that the cause is not the cause 1, the process proceeds to step n6, and it is determined whether the cause of the jam is a preset jam (cause 2) at the peeling portion. If it is determined that the cause of the jam is the cause 2, the process proceeds to step n7, and the number of jams of the cause 2 of the jam occurring between the current number of copies and a predetermined number of times before is determined by the cause-specific jam counter 2d. Is counted up. Subsequently, the process proceeds to step n8, and the jam occurrence rate of the jam cause 2 is calculated by the cause-specific jam occurrence rate calculating means 2e in the same manner as in the case of the jam cause 1.

If it is determined in step n6 that the cause is not the cause 2, the process proceeds to step n9, and it is determined whether or not the cause of the jam is a preset paper output unit (cause 3). If it is determined that the cause of the jam is cause 3, the process proceeds to step n10, and the number of jams of the cause 3 of the jam that has occurred from the current number of copies to a predetermined number of times before is determined by the cause-specific jam counter 2d. Is calculated and counted up. Subsequently, the process proceeds to step n11, and the jam occurrence rate of the jam cause 3 is calculated by the cause-specific jam occurrence rate calculating means 2e as in the case of the jam causes 1 and 2.

If it is determined in step n9 that the cause is not jam 3, the process proceeds to step n12. The serviceman turns on the operation keys 3 provided on the operation panel 26 and the like as needed during maintenance and inspection, thereby providing n13.
Proceed to the following steps.

In step n13, the jam counter 2b
Is displayed on the display means 4 on the operation panel 26 for, for example, two seconds.

Then, the process proceeds to step n14, in which it is determined whether or not the data of the cause of the jam calculated in step n5 by the cause-specific jam occurrence rate comparing / determining means 2f is equal to or more than a preset reference value (for example, 10%). Is done. If the result is equal to or larger than the reference value, the process proceeds to step n15, and the jam occurrence rate data of the jam cause 1 is displayed on the display means 4 for, for example, 2 seconds. If it is smaller than the reference value, the process skips step n15 and proceeds to step n16.

Thereafter, steps n16 to n19
In the above, the judgment and display of the jam occurrence rate data of the jam cause 2 and the jam cause 3 are performed in the same manner as in the case of the jam cause 1 described above.

In the above embodiment, the processing is performed based on the jam data generated between the current number of copies and a predetermined number of times before. The same processing as in the above-described embodiment may be performed based on jam data generated before.

In the above embodiment, the jam counter 2b
Although the counter of the jam counter 2b according to the cause is configured to calculate and count jam data generated between the current number of copies and a predetermined number of times before, the counters 2b and 2d merely count. May be performed, and a separately provided operation may be performed based on the data.

In the above-described embodiment, the data of the jam occurrence rate for each cause is configured to be displayed by comparing it with the reference value. However, as shown in FIGS. A comparison is made as to whether jam data for each cause that has occurred up to a predetermined number of times before is equal to or more than a reference value (for example, 10 times) of the number of times of occurrence of jam, and if the jam data is equal to or more than the reference value, it is determined. The data of the jam counter 2d may be displayed.

[0026]

According to the image forming apparatus of the present invention, the jam
When a jam occurs, the jam occurs retrospectively from the current jam occurrence
The state of occurrence of the
Can be displayed on the screen.
Jams caused by abnormalities due to the aging of the product
Can be quickly and accurately recognized,
Requests for maintenance and inspection can be made promptly,
It can prevent repairs from becoming impossible due to delays
You.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a schematic configuration of a copying machine according to the present invention.

FIG. 2 is a main part configuration diagram of an operation panel unit of the copying machine according to the present invention.

FIG. 3 is a control flowchart according to the present invention.

FIG. 4 is a control block diagram according to the present invention.

FIG. 5 is a control flowchart of another embodiment of the present invention.

FIG. 6 is a control block diagram of another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 jam detection sensor 2a jam determination means 2b jam counter 2c jam cause determination means 2d cause-specific jam counter 2e cause-specific jam occurrence rate calculation means 2f cause-specific jam occurrence rate comparison determination means 2g cause-specific jam data comparison determination means 4 display means

Continuation of the front page (56) References JP-A-56-164358 (JP, A) JP-A-58-219570 (JP, A) JP-A-3-219265 (JP, A) JP-A-4-93958 (JP) JP-A-4-85555 (JP, A) JP-A-1-92764 (JP, A) JP-A-2-259966 (JP, A) JP-A-4-179654 (JP, A) 4-66452 (JP, A) JP-A-1-92766 (JP, A) JP-A-4-174452 (JP, A) JP-A-61-193943 (JP, U)

Claims (2)

(57) [Claims] A jam detecting sensor for detecting a jam in the sheet conveying path; a jam determining means for determining whether or not a jam has occurred based on a signal from the jam detecting sensor; An image forming apparatus comprising: a jam cause determining unit that determines a cause of a jam based on a signal; the image forming apparatus generates the jam between a current number of times of copying and a predetermined number of times before based on a signal from the jam determining unit. A jam counter that counts the number of jams, a jam counter that counts the number of jams that have occurred from the current number of copies to a predetermined number of times before based on a signal from the jam cause determination unit, and a jam counter that causes the jam. Causes that occurred between the current number of copies and a predetermined number of times before based on the counter data and the above-mentioned jam counter data by cause A cause-specific jam rate calculating means for calculating another jam rate, and a cause determined by comparing the data calculated by the cause-specific jam rate calculating means with a preset jam rate reference value. Jam occurrence rate comparison and determination means, and display means for displaying cause-specific jam occurrence rate data based on the result of comparison and determination by the cause-specific jam occurrence rate comparison and determination means in accordance with an instruction from the display instruction means. Image forming apparatus. 2. A jam detecting sensor for detecting a jam in a paper transport path, a jam determining means for determining whether a jam has occurred based on a signal from the jam detecting sensor, and the jam determining means. An image forming apparatus comprising: a jam cause determining unit that determines a jam cause based on a signal from the image forming apparatus. A jam counter that counts the number of jams that have occurred, and a jam counter by cause that counts the number of jams that have occurred from the current number of copies to a predetermined number of times before based on a signal from the jam cause determination unit. and by cause jamming data comparison determination unit determines by comparing the preset reference values with the data of the cause-specific jam counter, display finger Display means for displaying the data of the cause-specific jam counter based on the result of the comparison judgment by the cause-specific jam data comparison / judgment means in accordance with the instruction of the indicating means .