JP4507313B2 - Printing device and printing system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printing apparatus that causes a computer to display the occurrence of an abnormality, and a printing system that includes the printing apparatus and a computer connected to the printing apparatus.
[0002]
[Prior art]
The printing apparatus receives a printing command transmitted from a connected computer and printing information such as a document or an image, a font, and a paper size, and sends a sheet based on the printing command and the printing information. The required printing is performed by driving a motor for moving the printing head, a motor for moving the printing head, and the printing head.
[0003]
Such a printing apparatus includes a CPU, a motor driving circuit for driving the motor, and a printing head driving circuit for driving the printing head. The printing head driving circuit is controlled to cause the motor and the printing head to perform required operations.
[0004]
Further, the printing apparatus rectifies alternating current from an external alternating current power source and converts it into, for example, 30V direct current, and first and second 30V direct current output from the rectifier circuit is converted into 12V and 5V direct current, respectively. A second converter circuit, wherein the direct current output from the rectifier circuit is converted into required power by the motor drive circuit and supplied to the motor, and the direct current output from the first converter circuit is supplied to the printing head; The drive circuit converts the power into required power and supplies it to the printing head, and the CPU is driven by the direct current output from the second conversion circuit.
[0005]
Also, in the above-described printing apparatus, when various abnormalities occur, it is necessary to notify the operator of the abnormality and call attention, and the abnormality is detected and the built-in display panel, computer display, etc. The occurrence of the abnormality is displayed.
[0006]
In JP-A-2-301818, when a plurality of abnormalities occur, the abnormality that occurred first or the abnormality that should be resolved first is displayed on the display panel, and when the abnormality is resolved, In addition, a printing apparatus is disclosed in which an abnormality that occurs next or an abnormality that should be resolved next is displayed on a panel to deal with the occurrence of a plurality of abnormalities.
[0007]
JP-A-2-303877 includes an abnormality monitoring device that discriminates a plurality of types of abnormality, and when an abnormality occurs, the abnormality monitoring device generates abnormality information corresponding to the type of abnormality, Upon receiving the abnormality information, a pulse generator generates a periodic pulse signal corresponding to the abnormality information, and the LED is turned on and off repeatedly by the pulse signal, thereby displaying a plurality of types of abnormality contents with one LED. A printing device is disclosed.
[0008]
Japanese Patent Application Laid-Open No. 3-26583 discloses that the number of display characters can be displayed by displaying a message including detailed contents of an abnormality that has occurred and a recovery method on the built-in liquid crystal display panel while shifting one character at a time. A printing apparatus capable of displaying a message that cannot be displayed at a time on a limited liquid crystal display panel is disclosed.
[0009]
Japanese Laid-Open Patent Publication No. 4-82722 sets a threshold value for each operating state of the printing apparatus, and activates an overcurrent protection means when a result detected by a built-in current detector exceeds the threshold value. A printing apparatus is disclosed in which the power supply from the power supply is stopped to enable protection according to the load current value that changes depending on the operation state, and the reliability of the apparatus is improved.
[0010]
Japanese Patent Application Laid-Open No. 4-78562 detects current values supplied to loads such as a motor and a heater of a printing head, and detects each detected current value and normality determined for each load. There has been disclosed a printing apparatus that can compare a current value, individually determine the occurrence of an abnormality for each load, and identify the load in which the abnormality has occurred.
[0011]
[Problems to be solved by the invention]
However, in the conventional printing apparatus as described above, the abnormality displayed on the computer display is not a fatal abnormality such as out of paper, out of ink, power off of the printing apparatus, connection abnormality with the printing apparatus, etc. When a short circuit occurs and an overcurrent is applied to the motor, the printing head, etc., the power supply is cut off by the overcurrent protection means. There is a problem that only a message such as a connection error with the printing apparatus is displayed, and it takes time to investigate the cause of the failure, and the recovery work cannot be performed quickly.
[0012]
The present invention has been made in view of such circumstances, and when a short-circuit accident occurs, an abnormality display indicating the occurrence of the short-circuit accident can be displayed on the display of the computer, and the recovery operation can be quickly handled. An object is to provide a printing apparatus and a printing system.
[0013]
[Means for Solving the Problems]
Indicia shooting apparatus according to the first invention, a CPU for controlling the driving of the motor Shirushiutsushi head and paper feeding, DC by rectifying the AC power from external AC power source voltage for driving the motor for the paper feed indicia copy converts a rectifier circuit for supplying the basic circuit system including the motor for the paper feeding power, the output DC power of the rectifier circuit into a DC power of a first voltage value for driving the indicia shooting head a second portion comprising a first converter circuit for supplying the first partial circuit system including the head, the CPU is converted into DC power of a second voltage value for driving the CPU of the output DC power of the rectifier circuit In a printing apparatus including a second conversion circuit that supplies a circuit system, the printing apparatus is connected between the rectifier circuit and the paper feeding motor, and decreases as the current value supplied to the basic circuit system increases. first detecting means for outputting a first detection signal detected current value It is connected between the first converter and the indicia shooting head, the outputs of the second detection signal which detected the current value decreases with increase of the current value supplied to the first partial circuit system comprising a second detecting means, and overcurrent protection means for cutting off the output power of the rectifier circuit, the CPU is equal to or less than the first threshold value a first detection signal in output from said first detecting means is set in advance A monitoring control function that constantly repeats the determination of whether or not the second detection signal being output from the second detection means is equal to or lower than a second threshold value set in advance, and the monitoring control function When it is determined that either one of the first detection signal and the second detection signal is equal to or lower than the first threshold value or the second threshold value, the circuit system connected to the detection means that outputs the detection signal equal to or lower than the threshold value is defined as a short-circuit occurrence location. external to generate the identified abnormality occurrence information And abnormal location determination control function of transmitting toward a vessel, the abnormality location determination control function and starts measuring a predetermined time from the point of identifying the short circuit portion, the abnormality occurrence information the abnormal point determination control function to an external device It has a power cutoff control function for controlling the power cutoff means to the cutoff state when the predetermined time required to finish sending is finished .
[0014]
The printing apparatus according to the second invention is the printing apparatus according to the first invention, as long as the input voltage does not drop below the first voltage value and the second voltage value, respectively, in the first and second conversion circuits. The first voltage value and the second voltage value are output at a constant voltage, and each of the first and second detection means includes at least two resistors connected in series, and a voltage value at a connection point of the resistors. The overcurrent protection means is turned on by the power cutoff control function and is switched from the rectifier circuit to the fuse. It is characterized by comprising a switching element for passing a current exceeding the rated current .
[0015]
A printing system according to a third invention comprises a printing device according to the first or second invention, and a computer connected to a CPU of the printing device , wherein the computer includes printing information and a CPU. together to perform a sign copy process by sending the Shirushiutsushi instruction, characterized in that the screen display information including at least an abnormality occurrence location and fault condition on the basis of the abnormality information transmitted from the indicia shooting device.
[0016]
The printing system according to a fourth aspect is the printing system according to the third aspect, wherein the computer includes recording means for recording the abnormality occurrence information.
[0017]
If by indicia shooting apparatus according to the first invention, when an overcurrent flows shorted to either of the basic circuit system or the first partial circuit system occurs, the current flowing to the detecting means connected to the circuit system Since the detection means detects the reduced current value and sends a detection signal to the CPU, the detection signal is sent when it is determined that the detection signal input by the CPU is below the threshold. Abnormality occurrence information that identifies the circuit system to which the detection means is connected as a short-circuit occurrence point is generated and sent to an external device. Thus, an operator who performs maintenance and inspection, since Ru can be known instantly short circuit portion based on the abnormality occurrence information transmitted to the external apparatus, it becomes possible to perform the recovery work quickly. Also, unlike the conventional overcurrent protection means that immediately cuts off the power supply when the CPU determines that an abnormality has occurred, the power supply is performed when a predetermined time required to finish sending out the abnormality occurrence information has passed. Since the interruption is performed, the abnormality occurrence information is reliably transmitted to the external device, and the safety can be further improved. On the other hand, in the case of the printing system according to the third aspect of the invention, information abnormality occurrence information is displayed on the computer, so that the maintenance inspection operator immediately confirms the abnormality occurrence location and the failure contents by visual display. be able to.
[0018]
In the case of the printing apparatus according to the second invention, each of the first and second detection means can reliably detect a short circuit occurring in the corresponding circuit system with a simple configuration, while the overcurrent protection means The power supply can be reliably cut off with a simple configuration, and the printing apparatus according to the first invention can be easily implemented with an inexpensive configuration.
[0019]
In the case of the printing system according to the fourth aspect of the invention, for example, by recording the failure content on the flexible disk with a connected computer, the manufacturer collects the flexible disk and examines the recorded content to determine what type of failure. Since it is possible to know whether or not there is a failure, it is not necessary to disassemble the printing apparatus in order to investigate the failure location and the failure content, and the manufacturer can quickly cope with the failure.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1
Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. FIG. 1 is a schematic diagram showing the configuration of the main part of Embodiment 1 of the printing system according to the present invention.
[0021]
In FIG. 1, reference numeral 100 denotes a printing apparatus. The printing apparatus 100 includes an interface terminal 101 such as a parallel terminal or a USB terminal, and is connected to the computer 200 by connecting the interface terminal 101 and an interface terminal 201 included in the computer 200.
[0022]
The computer 200 stores a driver program for driving the printing apparatus 100 in a built-in hard disk 202. The driver program receives the printing information output from the application program stored in the hard disk 102 to print the specified document, image, etc. according to the specified font, paper size, etc. Output from the interface terminal 201.
[0023]
FIG. 2 is a block diagram showing a configuration of a main part of the first embodiment of the printing apparatus 100 according to the present invention. In FIG. 2, reference numeral 1 denotes a CPU, and 11 denotes a ROM that stores a program for causing the CPU to control each unit based on the printing instruction and the printing information and to perform a printing process. The printing apparatus 100 includes a rectifier circuit 41 that rectifies AC from an external AC power source S into, for example, 30V DC, a first DC / DC converter 42 that converts DC output from the rectifier circuit 41 into 12V DC, and the like. Is provided with a second DC / DC converter 43 for converting the direct current to 5V direct current. Further, a fuse 7 and a collector of an NPN transistor 8 are connected in order from the output terminal side near the output terminal of the rectifier circuit 41 of the printing apparatus 100. The emitter of the transistor 8 is grounded and the base is Connected to CPU1.
[0024]
The first DC / DC converter 42 and the second DC / DC converter 43 supply constant voltage direct current of 12V and 5V unless the direct current output from the rectifier circuit 41 becomes a voltage lower than 12V or 5V, respectively.
[0025]
The CPU 1 is driven by the direct current output from the second DC / DC converter 43. The CPU 1 is connected to the interface terminal 101 via an AD converter 61, receives the printing command and printing information, and drives the printing head H and the stepping motor M built in the printing apparatus 100. Control signals are output to the connected printing head drive circuit 31 and pulse generation circuit 2.
[0026]
The pulse generation circuit 2 outputs a phase distribution pulse signal to the motor drive circuit 3 based on the control signal. The motor drive circuit 3 has a plurality of switching elements, turns on / off the switching elements based on the phase distribution pulse signal, and converts the direct current output from the rectifier circuit 41 into a current having a required waveform. The stepping motor M is supplied.
[0027]
The printing head drive circuit 31 converts the DC voltage output from the first DC / DC converter 42 into a voltage having a required waveform, and applies it to the printing head H so that the required ink particles are ejected from the ejection nozzle. It is like that.
[0028]
The rectifier circuit 41 and the motor drive circuit 3 are connected via a voltage divider circuit 51, and the first DC / DC converter 42 and the printing head drive circuit 31 are connected via a voltage divider circuit 52. In the voltage dividing circuit 51, resistors R ₁ and R ₂ are connected in series, an end on the resistor R ₁ side is connected between the rectifier circuit 41 and the motor drive circuit 3, and an end on the resistor R ₂ side is connected. It is grounded and an intermediate node is used as an output terminal, and the output terminal is connected to the CPU 1 via the AD converter 62. Similarly, the voltage dividing circuit 52 has resistors R ₃ and R ₄ connected in series, and an end on the resistor R ₃ side is connected between the first DC / DC converter 42 and the printing head drive circuit 31, and the resistor The end on the R ₄ side is grounded, and the intermediate node is used as an output terminal. The output terminal is connected to the CPU 1 via the AD converter 63.
[0029]
In the following, the part to which direct current of 30 V output from the rectifier circuit 41 is directly applied is the basic circuit, the part to which direct current of 12 V output from the first DC / DC converter 42 is applied is the first partial circuit, The portion to which 5V direct current output from the 2DC / DC converter 43 is applied is referred to as a second partial circuit.
[0030]
When a short circuit occurs in a part of the basic circuit, for example, the motor drive circuit 3, current concentrates on the motor drive circuit 3, thereby reducing current supplied to other parts. Accordingly, the current flowing to the voltage dividing circuit 51 is also reduced, and the voltage value V ₅₁ detected from the output terminal of the voltage dividing circuit 51 is also reduced. At this time, the current applied to the first and second DC / DC converters 42 and 43 also decreases, but the voltage on the input side of each of the first and second DC / DC converters 42 and 43 does not drop to less than 12V and 5V. As long as the first and second DC / DC converters 42 and 43 are supplied with constant voltages of 12 V and 5 V, respectively.
[0031]
Similarly, when a short circuit occurs in a part of the first partial circuit, for example, the printing head drive circuit 31, current concentrates on the printing head drive circuit 31 and is supplied to other parts. The current decreases. Accordingly, the current flowing to the voltage dividing circuit 52 is also reduced, and the voltage value V ₅₂ detected from the output terminal of the voltage dividing circuit 52 is also reduced.
[0032]
When a short circuit occurs in a part of the second basic circuit, the CPU 1 cannot be driven and the function of the printing apparatus is stopped.
[0033]
When the output voltage value V _{51 of the} voltage dividing circuit 51 is lower than a predetermined threshold value T ₁ , the CPU ₁ determines that a short circuit has occurred in the basic circuit, and outputs abnormality occurrence information indicating the occurrence of an abnormality in the basic circuit to the computer 200. To send.
[0034]
Similarly, when the output voltage value V _{52 of the} voltage dividing circuit 52 is lower than a predetermined threshold value T ₂ , the CPU 1 determines that a short circuit has occurred in the first partial circuit, and generates an abnormality in the first partial circuit. Anomaly occurrence information that is represented is sent to the computer 200.
[0035]
FIG. 3 is a schematic diagram illustrating an example of an abnormality display screen. Receiving the abnormality occurrence information, the computer 200 displays an abnormality display screen corresponding to each abnormality occurrence information as shown in FIG. 3 on the display by the above-described driver program.
[0036]
In addition, the printing apparatus 100 applies a predetermined voltage to the base of the transistor 8 after a predetermined time has elapsed since sending the abnormality occurrence information to the computer 200, thereby bringing the transistor 8 into a conductive state. At this time, a current exceeding the rated current of the fuse 7 flows from the rectifier circuit 41 to the fuse 7 for a predetermined time, and the blown portion of the fuse 7 is blown to cut off the current.
[0037]
FIG. 4 is a flowchart showing a processing procedure for short circuit detection of the CPU 1. The output voltage values V ₅₁ and V ₅₂ of the voltage dividing circuits ₅₁ and ₅₂ are input (step S1), and it is checked whether or not the output voltage value V _{51 of the} voltage dividing circuit 51 is less than the threshold value T ₁ (step S2). If the output voltage V ₅₁ is greater than or equal to the threshold value T ₁ , it is checked whether or not the output voltage value V ₅₂ is less than the threshold value T ₂ (step S 3), and if the output voltage V ₅₂ is greater than or equal to the threshold value T _2. Return to step S1.
[0038]
If the output voltage value V ₅₁ is less than the threshold value T ₁ in step S2, the abnormality occurrence information indicating the occurrence of the short circuit in the basic circuit is sent to the computer 200 (step S4), and an abnormality display screen is displayed on the display of the computer 200. A timer for measuring the time to be displayed is activated (step S5).
[0039]
It is checked whether or not the time measured by the timer has reached a predetermined time (step S6). If the predetermined time has not been reached, the process of step S6 is repeated. If the predetermined time has been reached, the transistor 8 is turned on. Then, a predetermined voltage is applied to the base (step S7), and the process is terminated.
[0040]
Further, in step S3, when the output voltage value V ₅₂ is less than the threshold T _2, and sends an abnormality occurrence information indicating a short circuit of the first partial circuit described above to the computer 200 (step S8), and the process to step S5 Transfer.
[0041]
The fuse 7 may be another breaking device, and the voltage dividing circuits 51 and 52 may be other current detection devices. Further, the fuse 7 and the transistor 8 may not be provided.
[0042]
With the above configuration, when a short circuit occurs in the basic circuit or the first partial circuit, an overcurrent flows to the short circuit occurrence point, the output voltage of the voltage dividing circuits 51 and 52 decreases, and this is detected by the CPU 1. The abnormality occurrence information is sent to the computer 200, and an abnormality display screen corresponding to the abnormality occurrence information is displayed on the display. As a result, the operator can be notified immediately of the occurrence of an abnormality.
[0043]
In addition, by describing the failure content, the method of treatment, the contact information, etc. on the abnormality display screen displayed on the display, an appropriate recovery measure can be taken.
[0044]
In addition, when an abnormality occurs, the fuse 7 is operated after the abnormality display screen is displayed to shut off the power supply. Therefore, not only the operator is notified of the abnormality, but also the device can be protected and the safety can be ensured. Become.
[0045]
Embodiment 2
FIG. 5 is a block diagram showing the configuration of the main part of Embodiment 2 of the printing system according to the present invention.
[0046]
In the figure, reference numeral 203 denotes a flexible disk drive built in the computer 200. When a short circuit occurs in a part of the printing apparatus, abnormality information is sent to the computer 200 by the CPU 1. The abnormality occurrence information includes information such as the part where the abnormality has occurred and the content of the failure. The computer 200 that has received the abnormality occurrence information transmits the information such as the location of the abnormality and the content of the failure by the driver program to the flexible disk. Data is written on a flexible disk inserted in the drive 203. In addition, about the part similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0047]
The flexible disk drive 203 may be another recording device.
[0048]
With the configuration as described above, the manufacturer can easily identify the failure location by the flexible disk in which information such as the location where the abnormality has occurred and the content of the failure are written, and can repair the product quickly.
[0049]
【The invention's effect】
As described in detail above, in the case of the printing apparatus according to the first invention and the printing system according to the third invention, a short circuit failure occurred in the printing apparatus, and an excessive current was given to the inside of the printing apparatus. When the current value detected by the first and / or second detection means is larger than the rated current, the occurrence of the short-circuit fault is detected, and an abnormality display for notifying the operator of the occurrence of the short-circuit fault is displayed. Since it is displayed on the display, it is possible to reliably notify the operator of the occurrence of a short-circuit accident, and it is possible to improve safety compared to the conventional case.
[0050]
In the case of the printing apparatus according to the second aspect of the present invention, after the abnormality is displayed on the computer display, the power supply is cut off by the overcurrent protection means, so that the safety can be further improved.
[0051]
In the case of the printing system according to the fourth aspect of the invention, the abnormality occurrence information including the content of the abnormality that has occurred in the printing apparatus is recorded in the recording means, so that the manufacturer checks the abnormality occurrence information recorded in the recording means. The present invention has an excellent effect such that it is possible to know an abnormality that has occurred in the printing apparatus and to enable quick repair.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a configuration of a main part of Embodiment 1 of a printing system according to the present invention.
FIG. 2 is a block diagram showing a configuration of a main part of the printing apparatus according to the first embodiment of the present invention.
FIG. 3 is a schematic diagram illustrating an example of an abnormality display screen.
FIG. 4 is a flowchart showing a processing procedure for detecting a short circuit of a CPU.
FIG. 5 is a block diagram showing a configuration of a main part of Embodiment 2 of the printing system according to the present invention.
[Explanation of symbols]
1 CPU
11 ROM
DESCRIPTION OF SYMBOLS 100 Printing apparatus 2 Pulse generation circuit 200 Computer 203 Flexible disk drive 3 Motor drive circuit 31 Printing head drive circuit 41 Rectifier circuit 42 1st DC / DC converter 43 2nd DC / DC converter 51, 52 Voltage dividing circuit 7 Fuse H Printing Head M Motor

Claims (4)

Basic including a CPU, a motor for paper feed DC power of the AC power rectification to a voltage value for driving the motor for the sheet feeding from the external AC power source for controlling the driving of Shirushiutsushi head and motor paper feed a rectifier circuit for supplying the circuit system, supplying an output DC power of the rectifier circuit to the first part circuit system including the indicia shooting head into a DC power of a first voltage value for driving the indicia shooting head a first conversion circuit for a second converter circuit for supplying an output DC power into a DC power of a second voltage value for driving the CPU to the second partial circuit system including the CPU of the rectifier circuit In a printing apparatus comprising
A first detection means connected between the rectifier circuit and the paper feed motor and outputting a first detection signal for detecting a current value that decreases as the current value supplied to the basic circuit system increases ; ,
A second detection signal is connected between the first conversion circuit and the printing head and outputs a second detection signal that detects a current value that decreases as the current value supplied to the first partial circuit system increases . Two detection means;
Overcurrent protection means for cutting off the output power of the rectifier circuit,
Wherein the CPU,
It is determined whether or not the first detection signal being output from the first detection means is equal to or lower than a first threshold value set in advance , and the second detection signal being output from the second detection means is set to a second value set in advance. A monitoring control function that constantly repeats the determination of whether or not the threshold value has been reached,
The circuit to which the detection means that outputs a detection signal equal to or less than the threshold when the monitoring control function determines that either one of the first or second detection signal is equal to or less than the first or second threshold is connected to the circuit. An abnormality location determination control function that generates an abnormality occurrence information that identifies the system as a short-circuit occurrence location and sends it to an external device ;
The time measurement of the predetermined time is started from the time when the abnormal point determination control function specifies the short-circuit occurrence point, and the predetermined time required for the abnormal point determination control function to finish sending the abnormality occurrence information to the external device is timed. And a power cut-off control function for controlling the power cut-off means to a cut-off state when finished . Each of the first and second conversion circuits has a configuration that outputs the first voltage value and the second voltage value at a constant voltage unless the input voltage drops below the first voltage value and the second voltage value. Each of the first and second detection means is a voltage dividing circuit in which at least two resistors are connected in series and a voltage value at a connection point of the resistors is output as a detection signal.
The overcurrent protection means includes a fuse that is inserted and connected to the output unit of the rectifier circuit, and a switching element that is turned on by the power cut-off control function and flows a current exceeding the rated current from the rectifier circuit to the fuse. The printing apparatus according to claim 1, comprising: 3. A printing apparatus according to claim 1 and a computer connected to a CPU of the printing apparatus , wherein the computer sends printing information and a printing command to the CPU to perform a printing process. Shirushiutsushi system with, characterized in that the screen displaying the information including at least an abnormality occurrence location and fault condition on the basis of the abnormality information transmitted from the indicia shooting apparatus for.   The printing system according to claim 3, wherein the computer includes recording means for recording the abnormality occurrence information.

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