JPS6296971A - Abnormality display device for electronic copying machine - Google Patents

Abstract

PURPOSE:To discriminate a device where the abnormality occurs, by providing a panel with a graphic display indicating the arrangement corresponding to devices in an electronic copying machine and designating the corresponding position of the graphic display if the abnormality occurs in the device. CONSTITUTION:An alarm indicator lamp 70 concerning to a form jamming, a electrostatic charging leak, owing to a fixing fault transfer leak, a developing bias leak, eraser lamp burning-out, or the like is connected to an interface 46, and an indicator lamp group 80 indicating the troubles of peripheral devices of a photosensitive drum 2 is connected there. With respect to the indicator lamp group 80, the indicator lamps are arranged in the positions similar to the arrangements of individual controllers around a circle 81 indicating the photosensitive drum. The indicator lamp group 80 is provided in the electronic copying machine or on a console panel; and if any indicator lamp is extinguished, a user finds intuitively the position of the corresponding trouble part in the copying machine.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a display device for an electronic copying machine, and more particularly to a device for displaying abnormalities in each device within the device.

Problems with the Prior Art Conventional failure display devices simply light up a failure indicator lamp or display a symbol corresponding to the equipment in the copier when a device fails, so users who are not familiar with such displays may have trouble copying. It was difficult to determine which equipment on board the aircraft was malfunctioning.

Therefore, it is an object of the present invention to provide a display device that allows the location of a failure to be recognized by looking at it.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a panel with a pictorial display showing the arrangement corresponding to the equipment in the electronic copying machine, and when an abnormality occurs in the equipment, the corresponding picture on the display is displayed. The present invention is characterized in that the device in which the abnormality has occurred can be identified by specifying the display.

Function In the above structure, the display body is provided for an exposure lamp, a charger, etc., and when the exposure lamp fails, for example, the display body corresponding to the exposure lamp lights up.

Example An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a photoreceptor drum 2 is fixed to a shaft 3 at the center of an electronic copying machine l and rotates in the direction of arrow a, and a photoreceptor 4 is formed on the outer periphery of this photoreceptor drum 2. ing.

A charging charter 5 having a wire electrode 5a provided at the center of a stabilizer plate is provided above the photoreceptor drum 2 to apply a positive charge onto the photoreceptor 4.

An OFT (optical fiber tube) 6 is arranged close to the photoreceptor drum 2 and forms an image of a document on the surface of the photoreceptor 4 .

The toner stored in the toner tank 10 of the developing machine 9, which is provided on the left side of the photosensitive drum 2 in the figure and is equipped with a toner replenishing member, a developer spreading roller 7, and a developer stirring roller 8, is made of iron powder. It becomes positively charged by friction with a ferromagnetic carrier such as. This positively charged toner is repelled from the positively charged portion of the surface of the photoreceptor 4 of the photoreceptor drum 2 via the sleeve 11 as the sleeve 11, which is a weakly magnetic material containing a magnet, rotates. S, O
The electrostatic latent image is visualized by adhering to the uncharged area exposed by FT.

On the other hand, a copying sheet 13 is wound in a roll around a core cylinder 12 provided on the left side of the figure, and the leading end 13a is fitted into a pair of paper feed rollers 14a and 14b.
a, 14. When b is rotationally driven, the leading end of the sheet 13 is conveyed in the direction of arrow e at the same speed as the circumferential speed of the photosensitive drum 2. A conveyance guide plate 15 is provided along the conveyance path of the sheet 13, and a cutter 16 is disposed between the conveyance guide plate [5] and the paper feed rollers 14a, 14b.

The transfer charger 17 provided in the axial direction directly below the photosensitive drum 2 has a similar structure to the charging charger 5 described above, and a high negative voltage is applied to the wire electrode 17a. Due to the negative high voltage of the wire electrode +7a, the toner adhered to the photoreceptor drum 2 is sequentially adhered to the sheet conveyed directly below the photoreceptor drum 2.

The sheet to which this toner has been adhered is separated from the photoreceptor drum 2 by rotation of a separating claw 18 provided near the outer periphery of the photoreceptor drum 2, and is placed on a conveyor belt [9] moved by conveyor rollers 19a and 19b. be placed. Air intake holes (not shown) are uniformly provided on the surface of the conveyor belt 19, and the suction force of the fan motor acts on the sheet through the holes of the conveyor belt 19, causing the sheet to be drawn into the conveyor belt 19. It is conveyed in the direction of arrow e while being adsorbed to the surface.

The fixing rollers 20a, 20b are provided on the right side of the conveyor belt 19 in the figure.
Each has a metal core, the surface is formed of a silicone rubber layer, and the surface temperature is maintained at a predetermined temperature by heaters H1 and Ht provided inside. Then, when the sheet to which the toner is attached passes through the fixing rollers 20a and 20b, the toner is fused to the sheet by heat. The sheet to which this toner is fused is discharged from rollers 21a and 21b.
is discharged to the outside of the device l, and is detected by the discharge detection switch j.

On the other hand, a first eraser lamp 21 for removing the electrical charges on the photoreceptor drum 2 is provided above the separating claw 18.
On the left side of the eraser lamp 21 is a charger 22 for weight removal.
is provided.

FIG. 2 is a block circuit diagram showing an example of the control device according to the present invention, and the input interface 41 of the microcomputer 40 installed in the electronic copying machine 1 has the independent operation mode and sequence shown in Table 1. Dip switch (DIP +
Dual I nlinePackage)51
, 52, and 53 are connected.

Table 1 and, for example, the first stage 51- of the dip switch 51
1 is on, the CP is connected via the interface 41.
When this signal is applied to the U (central processing unit) 42 and identified, steps 11 and 12 of the program shown in FIG. 3 are executed to operate the charger 5.

In the multi-test of test item 12 in Table 1, various sequences per sheet of copy paper can be set using the dip switch 52 by switching the dip switch 52 to the fourth stage.
Only the functions specified in 1 (for example, charging, exposure, optical erase) are operated, and this operation is repeated n times from when the test mode start button 54 is pressed until when the stop button 55 is pressed.

Test item 13 single operation is dip switch 52
The above test mode is performed only once by operating the start button 54 in response to a signal from the fifth stage 52-5.

Test item 14 manual operation is dip switch 52
According to the signal from the sixth stage 52-5, for example, the photosensitive drum is rotated by 1/3 of a rotation.

To the interface 41, signals representing the control equipment in the electronic copying machine 1 and the paper supply status are applied from various detectors 56, as well as signals indicating alarms from the paper jam detector 57, etc. ing.

Programs for performing the various operations described above are shown in FIGS. 3 through 6, and these programs are stored in ROM (read only memory) 43, 44, 45. Further, the RAM 47 temporarily stores various information such as the operating status of each device and the lamp display status.

As shown in FIG. 7, the interface 46 of the microcomputer 40 is connected to various control devices of the copying machine, such as the electrostatic charger 5, the transfer charger 17, the developing sleeve, and the eraser lamp 21, through the output unit 60. The control equipment is driven in accordance with a signal output from the interface 46.

As shown in FIG. 7, the output unit 60 has a non-contact switch 61 and an output circuit 62 such as a high voltage transformer for each control device.
It has been made into a unit and each unit can be attached and detached separately, making maintenance and inspection easier.

Leak detection signals R,,R,...R from each output circuit 62
When n is applied to the interface 41 and each output unit 60 is short-circuited, an alarm is issued.

Connected to the interface 46 are warning indicator lights 70 for warnings such as paper jam, fixing failure charging leak, transfer leak, developing bias leak, eraser lamp burnout, etc. Also connected is a group of indicator lights 80 indicating malfunctions of equipment around the photoreceptor drum 2. has been done.

As shown in FIG. 8, the indicator light group 80 has indicator lights arranged around a circle 81 representing a photoreceptor drum at positions similar to the arrangement of each control device, 82 is an exposure lamp, and 83 is an exposure lamp. 84 is a cleaner, 85 is an eraser lamp, 86 is a static elimination charger, 87 is a transfer charger, 88
The developing unit is represented by a pictorial representation.

This indicator light group 80 is provided inside the electronic copying machine or on the operation panel, and when any indicator light goes out, the user can intuitively know in which part of the copying machine the malfunctioning device is located. is now possible.

Next, the operation will be explained.

Unit Test Mode For example, when it is desired to test the charger 5 alone, the first stage 51-1 of the dip switch 51 is turned on.

On the other hand, when the test mode start switch 54 is turned on, this signal is transmitted from the interface 41 to the CPU 42.
The program proceeds from step (2) to (2) in the program shown in FIG. , if NO, proceed to step ①. Since the start switch 54 is turned on as described above, the program proceeds to the unit test routine (2) shown in FIG.

The program shown in FIG. 3 is executed, and step () determines whether the dip switch 51-1 is ON or OFF.
It is determined within the PU 42. Then, the process proceeds to step @, where a signal to turn on the charger 5 is output from the CPU to the output terminal O1 of the interface 46, and the output unit I
-60-1, it is converted into a driving signal and applied to the charger 5, and the charger 5 operates.

The operations after step ■ are repeated, but in the above example, no signal is generated from any other source than the dip switch 51-1, so in the determination steps such as [stock], . . . Other control equipment will not operate.

The charger 5 is a stop switch 5 for test mode.
It is driven until 5 is turned ON.

Further, for example, the second stage 51- of the dip switch 51
2 is turned on, a signal 0010 is applied to the CPU 42 via the interface 41.

In this case, the determination in step ■ in Figure 3 is NO,
Proceeding to step (2), the charger 5 is turned off, proceeding to step [stock], where the determination is YES, and proceeding to step (2), where exposure (OFT 6 operation) is performed.

The operations of other control devices are also similar to those described above.

In addition, if multiple dip switches are set,
For example, if 51-1 and 51-2 are set, a plurality of set unit tests are performed simultaneously.

Multi-test mode (sequence mode) In the sequence mode, the paper conveyance system operates.

For example, the charger 5 and the paper feed roller 14a.

14b1 When you want to see the mutual interlocking relationship with the photoreceptor drum 2, press the dip switch 5 corresponding to each element.
1-1.51-m (for paper feed roller).

5l-n (for photoreceptor drums) are respectively turned on.

Meanwhile, the dip switch 52-4 is turned on.

Furthermore, the test mode start button 54 is turned on.

The signals of each switch are sent to the CP via the interface 41.
Applied to U42, from step ■ to step ■ in Figure 5
If it is determined that the start switch 54 is on, the process advances to step (3).

Since the dip switch 52-4 is turned on as described above, the process proceeds to step (2) and the sequence mode shown in FIG. 6 is entered.

Then, when it is determined in step O that the dip switch 52-4 is turned on, the process proceeds to step 0,
A multi-test routine is executed.

Then, in step O, the dip switches 51-1, 51
-m, 51-n are detected to be on, and first,
When the paper feed rollers 24a and 24b are started and the paper is fed to a predetermined position and a well-known detection switch is activated, a detector 56 is activated.
A signal is applied to the CPTJ 42, and the charger 5 and the photosensitive drum 2 are activated by this signal.

For example, the charger 5 is stopped by a timer, and the paper feed roller is also stopped when the paper advances to an appropriate position.

If it is detected in step O that the stop switch 55 is not pressed, the process returns to step O and the above-described operation is repeated.

``This process is repeated until the stop switch 55 is turned on.

Note that in this multi-test, each element selected by a dip switch for unit test mode is driven in a predetermined sequence.

If the single test dip switch 52-5 is turned on and the other dip switches are selected in the same manner as in the multi-test described above, the process proceeds to step O, and each selected device performs the above-described operation only once.

The manual test dip switch 52-6 is turned on, the photosensitive drum is specified with the dip switch 51-n, and 1/3, for example, is specified with the dip switch 53-m.

Thereafter, when the start switch 54 is turned on, step O is selected in step O (FIG. 6) by the signal from the dip switch 52-6.

Then, the photoconductor drum 2 starts up, but when a signal indicating that the amount of rotation of the photoconductor drum 2 has become 1/3 is input from the detection unit 56 (or a timer in the CPU causes the photoconductor drum 2 to start up). When the time corresponding to 173 rotations has elapsed, the photosensitive drum 2 stops.

This type of operation is effective when measuring the dark decay of the photoreceptor drum at the development position with a surface electrometer.

Normal sequence mode (test print) DIP switch 53-1 is a switch for switching between the above-mentioned test mode and normal sequence mode, and normal sequence mode or test print is possible when 53-1 is not turned on. become. In this case, proceed to step O via step 4 in FIG.
-1 is determined to be on or off, and the operation in steps O to O performs the same operation as a normal electronic copying machine.

If an abnormality occurs during printing, a signal from the detector 57 is applied to the CPtJ42 via the interface 41, and this signal is judged in step O.
The process proceeds to step 1, where the fault location is detected, and the corresponding fault is displayed on the alarm indicator light 70.

Further, since the test print switch 58 is located inside the copying machine and is performed by opening the door, a negative determination is made in step O, and the process proceeds to step (2). In step O, an alarm indicating that the door is open is displayed. Next, when the test print switch 58 is pressed, one sheet of the test chart is printed, and the test print operation can be performed many times until the reset switch in step ◯ is turned on. (Refer to Figure 4) Note that the developing bias in a copying machine is generally used when toner particles are attached to an electrostatic latent image formed on the surface of a photoreceptor drum in a developing device. A bias voltage is applied between the two, and is used for the purpose of preventing excessive adhesion of toner.

Such a developing bias is normally applied by applying a predetermined voltage to the developing sleeve in a copying machine that uses a magnetic brush developing method, such as the copying machine of the present invention.

Specifically, the bias voltage is set to be switchable between, for example, +400, O, and -300 [V].

Here, the developing bias sometimes causes leakage, which adversely affects the reproduced image. In particular, in the method of developing a positive electrostatic latent image with a positively charged toner in this embodiment, a black linear pattern is produced, which is extremely inconvenient.

For this reason, the copying machine of the present invention has a developing bias leak check function, and if there is a leak, it is displayed to prevent the above-mentioned inconvenience from occurring.

For leakage detection, means for detecting leakage current, means for detecting a decrease in bias voltage, etc. can be selected as appropriate.

Further, if the failure has occurred around the photosensitive drum 2, the CPU 42 determines the detection signal from the detector 57,
Indicator lights 82 or 8 shown in FIG. 8 depending on the location of the failure.
8 is selectively displayed to intuitively inform you of the location of the failure.

Although not displayed on the alarm display section 70, a failure may be determined from the print result, such as whether the print result is completely black or completely white.

In such a case, a test print is performed to check whether there is an abnormality in the electric circuit system for each output unit 60, and whether there is an abnormality in the control system can be determined by checking the signal of the latch 81 connected to the interface 46. An abnormality can be determined by displaying on the display unit 80.

That is, if any of the indicator lights 82 to 88 is off,
It is determined that the control system in the part where the light went out is out of order, and if the printing is defective even though all the indicator lights 82 to 88 are on, it can be determined that the output knit is defective.

Note that a display unit similar to that shown in FIG. 8 may be provided on the output side of the non-contact relay 61 of each output unit 60 to detect a failure of the output unit.

Effects of the Invention As described in detail above, in the present invention, since a display is displayed corresponding to a device that has a failure, the user can identify the location of the failure just by looking at it, making it easier to discover the failure.

[Brief explanation of drawings]

Fig. 1 is a diagram showing an example of an electronic copying machine to which the present invention is applied, Fig. 2 is a block circuit diagram showing an embodiment of the invention, and Figs. FIG. 7 is a circuit diagram showing the output section of the embodiment of FIG. 2, and FIG. 8 is a front view showing an example of a failure display section. 1... Electronic copying machine, 2... Photosensitive drum, 5...
Electrostatic charger, 17... Transfer charger, 40...
・Microcomputer, 41.46...Interface, 42...CPtJ, 43,44.45...
ROM. 51.52.53...Dip switch, 56...
Detector, 60... Output unit, 70... Alarm indicator light, 82-88... Indicator light. Patent Applicant Minolta Camera Co., Ltd. Agent Patent Attorney Aobai Ao and 2 others Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] (1) A pictorial display indicating the arrangement corresponding to the equipment in the electronic copying machine is provided on the panel, so that when an abnormality occurs in the equipment, the equipment in which the abnormality has occurred can be identified by specifying the corresponding pictorial display on the display. An abnormality display device for an electronic copying machine, characterized in that: