JPH10177325A - Abnormality detecting processor for copying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which stores a copying mode and the condition of a machine into a nonvolatile memory together with an abnormal item when abnormality occurs in the copying machine and outputs the stored contents, so that the cause of the abnormality can be easily estimated and rapid repair can be realized. SOLUTION: When a CPU 1 detects the abnormality of the copying machine by the condition signal of a fixing thermistor 6, etc., the copying mode, and the detecting condition and the output port level of each sensor are stored into the nonvolatile memory 4 together with the abnormal item. Then, a serviceman reads out the respective contents stored in the memory 4 by the specified key operation of an operating part 11, displays them on the part 11. Thus, the serviceman can easily estimate the cause of the abnormality, so that he can realize the rapid repair.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting an abnormality in a copier, which can easily estimate the cause of the abnormality when the copier is abnormal.

[0002]

2. Description of the Related Art Conventionally, when an abnormality occurs in a copying machine, it is general that when an abnormality is detected, the machine stops its operation and displays an abnormality. The reset of this abnormal state is
Since the main switch is often turned on / off, the main switch must be turned off to determine in which copy mode the error occurred and the state of the machine at that time.
There are few cases where confirmation can be made even if the machine at the time of occurrence of the abnormality is saved as it is without performing FF. For this reason, the serviceman must estimate the cause of the abnormality and repair it while listening to the situation at that time from the person who was using the machine at the time of occurrence of the abnormality. In addition, regarding the occurrence of an abnormality in such a copying machine,
An abnormal operation storage control device for a copying machine described in Japanese Patent Application Laid-Open No. 56-142543 is known.

[0003]

However, in the conventional apparatus, when an abnormality occurs, the generated abnormality item is stored in a non-volatile memory and the main relay is turned off to cut off the supply of power to an AC (AC) load. However, there is an inconvenience that the copy mode and the state of the machine at that time cannot be stored.

Accordingly, an object of the present invention is to provide an
The copy mode and machine status at that time are stored in the non-volatile memory together with the abnormal items, and the data stored in the memory can be checked even after the main switch is turned off, thereby facilitating the estimation of the cause of the abnormality. Another object of the present invention is to provide a copier abnormality detection processing device capable of realizing quick repair.

[0005]

According to the first aspect of the present invention, in a copying machine, when a copy mode is input by an input means, the image forming means forms an image in accordance with the input copy mode. State detecting means for detecting the state of each part of the image forming means, abnormality detecting means for detecting an abnormality of each part of the image forming means based on the state detection of each part of the state detecting means, and when the abnormality detecting means detects an abnormality A non-volatile storage unit for storing the detection content of the state detection unit at the time of detection, a copy mode at the time of the detection, and an abnormality item detected by the abnormality detection unit; The above object is achieved by providing an output unit for outputting each content.

According to a second aspect of the present invention, in the abnormality detection processing apparatus for a copying machine according to the first aspect, the output means is a display means, and each content stored in the nonvolatile storage means is transmitted to the input means by the input means. The above object is achieved by outputting a display on the display means by operating a specific key.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 and 2. FIG. FIG. 1 is a block diagram of an abnormality detection processing device for a copying machine according to this embodiment. The abnormality detection processing device of this copying machine has a CPU (Central Processing Unit) 1 which has a ROM (Read Only Memory) 2 and a RAM (Random Access Memory) as shown in the figure.
Memory) 3, NVRAM (non-volatile RAM) 4, A / D
Converter 5, D / A converter 9, operation unit I / F (1
0), a parallel I / F (12) is connected.

As an example of the analog input, an analog signal for detecting the operation state of the fixing thermistor 6 is input to the A / D converter 5. The output side of the D / A converter 9 is connected to, for example, a developing bias power supply 8 that generates a high-voltage output voltage proportional to the analog input.
The high-voltage output side of the developing bias power supply 8 is connected to the developing sleeve 7 of the developing section. The operation unit I / F (10) is connected to an operation unit 11 capable of performing key input as described later and capable of performing display according to the key input. A paper sensor 13 composed of a photo interrupter is connected to the parallel I / F (12) as an example of a sensor, and a paper feed CL (paper feed clutch) 1 is output as an example of an output load.
4 and a paper feed tray raising motor 15 are connected.
A sensor for detecting the state of each part of the copying machine, a CPU,
Although there are various loads other than the above examples, the load to be controlled by the control 1 is not directly related to the present invention, and the description thereof is omitted.

In the embodiment having such a configuration,
When the user sets a copy mode using the operation unit 11, the set copy mode is arithmetically processed by the CPU 1 according to a control program stored in advance in the ROM 2, and the above-described loads and inputs in the copier are processed. It is performed by controlling. The copying operation is sequentially executed in order to execute the copying mode set as described above, but the sequence operation may not be executed due to various causes. For example, the output voltage of the developing bias power supply 8 becomes an abnormal value, or the input value of the fixing thermistor 6 becomes an abnormal value.

In this case, when the copying operation cannot be continued, the operation of the machine (copier) is stopped. In order to inform the user of this abnormal state, a so-called SC display (serviceman call display) is performed. This serviceman call display is performed by displaying, for example, a message such as “An error has occurred in the machine. Please contact a serviceman. SCNo. 100” on the operation unit 11. by the way,
This display reset of the serviceman call display is
Generally, the operation is performed by turning the main switch OFF / ON. In a normal case, the state of the machine at the time of occurrence of an abnormality, such as the copy mode, the state of the transfer paper in the machine, and the detection level of each sensor, is lost. Therefore, it is difficult for a serviceman who visited the cause of the abnormality to estimate the cause. For this reason, in this embodiment, the state of the machine at the time of occurrence of an abnormality is stored in the non-volatile RAM 4 so that a serviceman or the like can easily analyze the cause of the abnormality by the operation described below.

The operation of this embodiment when an abnormality occurs will be described with reference to the flowchart of FIG. First, the CPU 1 determines whether or not an abnormality (SC: serviceman call) has occurred (step 1). Here, each abnormality detection routine exists in each control routine, and it suffices if it is determined that any abnormality has occurred. When the occurrence of an abnormality is confirmed (step 1; Y), first, an event logging process is performed to confirm which abnormal item has occurred (SCN).
o. Is determined), the value of the total counter at the present time is confirmed, and the abnormal item and the counter value that have occurred are stored at predetermined addresses in the nonvolatile RAM 4 (step 2).

Next, the copy mode when an abnormality occurs is confirmed by the set copy mode logging process, and the confirmed copy mode is stored at a predetermined address of the nonvolatile RAM 4 (step 3). Further, an I / O data logging process is performed (step 4). The I / O data logging process is performed in the state of the machine at the time of occurrence of the abnormality, for example, the ON / OFF state of the paper sensor 13, the paper feed tray raising motor 15, the paper feed clutch 14, the solenoid (SOL), etc. Is a process for storing the state of the sensor and the checked content at a predetermined address of the nonvolatile RAM 4. Subsequently, it is determined whether to perform “immediate disconnection processing” or “stop processing” based on the content of the abnormality (step 5). This judgment needs to be determined in advance for the SC item.

Here, the "immediate disconnection processing" means to immediately stop the copying operation. Specifically, the main relay is immediately turned to 0FF, the supply of power to the AC load is stopped, and the main operation is stopped. Stopping the operation of the motor.
On the other hand, the "stop process" means that the paper feeding operation stops immediately, but after all the copy papers existing in the machine are discharged,
This is to stop the operation of the main motor at the same time as setting the main relay to 0FF. As a result of the determination in step 5,
In the case of “immediate disconnection processing”, the process proceeds to step 6 to execute “immediate disconnection processing”, and in the case of “stop processing”, step 7
To execute the "stop process". Thereafter, a serviceman call screen display process is executed (step 8),
This routine ends.

Each data such as the state of the machine at the time of occurrence of an abnormality stored in the nonvolatile RAM 4 is stored in the SP
It is confirmed by a serviceman by a serviceman program mode called a mode. In the serviceman program mode, the display screen is displayed by a specific key operation in the operation unit 11, and the serviceman can set N by N for each item.
o. Can be used to check and change various set value data. By accessing the SC status (abnormal status) logging item, the SC number, total counter when an error occurs, copy mode when an error occurs, and error occurrence The state of each part of the machine at the time (level of each sensor and output port level) can be confirmed. As a result, the service engineer can easily analyze the cause of the abnormality that has occurred, and can quickly repair the abnormality.

[0015]

According to the present invention, when an abnormality is detected, the state of the machine, the copy mode, and the item of the abnormality at the time of the detection are stored in the non-volatile storage means, and the stored contents are output. The cause of the abnormality can be easily estimated by a man, and quick repair can be realized, thereby reducing the downtime of the machine.

[Brief description of the drawings]

FIG. 1 is a block diagram of an abnormality detection processing device of a copying machine according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an example of the operation of the apparatus.

[Explanation of symbols]

 Reference Signs List 1 CPU 2 ROM 4 Non-volatile RAM 6 Fixing thermistor 8 Developing bias power supply 11 Operation unit 13 Paper sensor 14 Paper feed clutch 15 Paper feed tray raising motor

Claims (2)

[Claims] 1. A copying machine in which, when a copy mode is input by an input unit, an image forming unit forms an image in accordance with the input copy mode, a state detecting unit detecting a state of each unit of the image forming unit; Abnormality detecting means for detecting an abnormality of each part of the image forming means based on the state detection of each part of the state detecting means; and detecting contents of the state detecting means at the time of detection when the abnormality detecting means detects an abnormality. , Copy mode at the time of its detection,
And a non-volatile storage means for respectively storing the abnormality items detected by the abnormality detection means, and an output means for outputting each content stored in the non-volatile storage means. Abnormality detection processing device. 2. The display device according to claim 1, wherein each of the contents stored in the non-volatile storage device is displayed on the display device by operating a specific key of the input device. 2. The abnormality detection processing device for a copying machine according to claim 1.