JPS6138035B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a label feeding control circuit for a label printer that prints a plurality of lines of data on the same label by feeding the label by a small pitch between lines.

Conventionally, label printers print part of multiple data, such as the processing date and the effective date, in multiple lines on the same label 1, as shown in Figure 1. There is something I did. Looking at the printing method in this case, after printing 2 on the 1st line, the lines are moved by a small pitch and stopped by a timer, and at that position, 3 on the 2nd line is printed, and the liner with label 1 pasted is fed. This is done and stopped by a label detector. Therefore, if we look at the specific means for this small pitch feed, the second
This is done under the circuit configuration shown in the figure. First, a motor 4 for label feeding is connected together with a triax 5 to an input AC power source 6 of 100 VAC, and a relay contact 7 for controlling the gate is connected to the gate side of the triax 5. Then, a signal is sent from within the feed to know whether the label feeding is completed and to move on to the next step, a signal called a feed pulse for label feeding, and a timer is used to feed between the first line 2 and the second line 3, and the second line is fed. A CPU 8 is provided which outputs a signal for one feed to cause the label detector to stop the feed after three prints. Further, 9 is a photodiode 10 and a phototransistor 11.
12 is a label detector that optically detects the position of label 1, and 12 has a capacitor C13 and a resistor R14, and when the voltage across this capacitor C13 exceeds the reference voltage, the output is inverted. This is a timer having a comparator 15. and,
Output signal TM from comparator 15 and the CPU
A NAND gate 16 is provided which receives the 1 feed signal from the label detector 9 and the output signal LD from the label detector 9 and the output signal from the power supply initial reset circuit 17.
It is input to the OR gate 18. Furthermore, this
The output from OR gate 18 is used as the reset input.
A flip-flop 19 is provided which receives the feed pulse signal from the CPU 8 as a set input, and its output is input to the amplifier 20 together with the feed signal from the CPU 18. A relay 21 that opens and closes the relay contact 7 is connected to the output side of the amplifier 20.

Under such a configuration, each signal is generated at a timing similar to the pulse waveform shown in FIG. In other words, after the 1st feed signal goes to L level with the printing of 2nd line on the 1st line, the label feed (small pitch feed between lines) is started by the generation of the feed pulse signal.
is carried out until the timer 12 reaches L level,
Thereupon, the second line 3 is printed, and the timer 12 is reset by the generation of the 1 feed signal.

However, such a small pitch feeding means using the timer 12 causes the following problem. In other words, the motor 4 does not stop instantaneously when the timer 12 times up due to the use of a triax 5 for controlling the motor 4, but rather stops when the voltage of the input AC power supply 6 reaches OV. The feed pulse from the CPU 8 is output regardless of the voltage waveform of the input AC power supply 6, and from there the feed pulse is output to the timer 1.
Since the voltage waveform of the input AC power supply 6 when the timer 12 is activated is near the OV,
It is completely random, such as when the voltage is at its highest peak or when the voltage is about to increase. Therefore, even if the timer time by the timer 12 is the same, for example, when the time-up occurs under the voltage waveform of the input AC power source 6 as shown in FIG. In the case where the time-up occurs under the voltage waveform of , the time when the triax 5 turns OFF differs, and the operating time of the motor 4 changes. As a result, since the rising power of the motor 4 varies, the printing pitch of the first line 2 and the second line 3 will vary from label to label 1 based on the difference in the rising curve.

In this case, if a pulse motor is used as the motor 4, the printing pitch can be made accurate, but it is costly and
Since torque and speed are issues, a reversible motor with high power is used.

The present invention has been made in view of the above points, and is a label feed system for a label printer that is capable of keeping the printing pitch of multiple lines constant for each label by using a timer and controlling the input AC power in connection with the input AC power. The purpose is to obtain a control circuit.

The present invention relates to a motor that feeds the label to an input AC power source and a trigger for controlling the operation of this motor in a device that prints multiple lines of data on the same label by feeding the label with small line spacing. A timer is connected to the rectifier and controls the operating time of the motor via this trigger rectifier, and the feed signal output from the CPU is synchronized with the detected signal by detecting the OV of the input AC power source. The present invention is characterized in that a power supply detection circuit is provided to drive the timer. Therefore, by providing a power supply detection circuit together with a timer and controlling it in relation to the voltage waveform of the input AC power supply, the operating time of the motor can be made constant, and therefore the printing pitch of each label can be kept constant and its variations can be kept constant. It is designed so that it can be eliminated.

A first embodiment of the present invention will be described based on FIGS. 5 and 6. Components that are the same as those shown in FIG. 2 are designated by the same reference numerals, and description thereof will be omitted. In this embodiment, a flip-flop 22 is provided between the flip-flop 19 and the amplifier 20, and the flip-flop 19 is connected to the input side D terminal of the flip-flop 22.
, a detection signal C which is the output of a power supply detection circuit to be described later is input to the C terminal, an amplifier 20 is connected to the Q terminal on the output side, and the terminal is connected to the timer 12 via an inverter 23. It is. Here, the power supply detection circuit 24 is connected to the input AC power supply 6.
A rectifier circuit 26 is connected to the input AC power supply 6 via a transformer 25, and based on the rectified waveform in the rectifier circuit 26, the rectifier circuit 26 detects the OV vicinity and operates the transistor 27. A Zener diode 28 is provided to generate a detection signal C, and this detection signal C is generated by the timer 12.
has also been entered.

In such a configuration, the operation will be described with reference to the waveform diagram shown in FIG. First, the rectified waveform corresponding to the voltage waveform of the input AC power source 6 is detected near its OV by the Zener diode 28, and a detection signal C is intermittently output. Therefore, when a feed pulse is output at a certain timing after the first line 2 is printed, the flip-flop 19 is set and produces an output.
The relay 21 is operated directly by the output of the motor 4.
never rotates. When the detection signal C is input to the C terminal of the flip-flop 22 while the flip-flop 19 is outputting, an output is generated from the Q terminal of the flip-flop 22 and the relay 21
As a result of this operation, the motor 4 begins to rotate. Further, the timer 12 is activated by this detection signal C, and when the timer time has elapsed, the flip-flop 19 is reset and the Q terminal of the flip-flop 22 is brought to the L level. Therefore, the rotation of the motor 4 stops when the voltage waveform of the input AC power supply 6 becomes OV after the output from the flip-flop 22 becomes L level, and up to the second line 3,
This means that label 1 has been fed by the printing pitch. In this way, since the operation of the motor 4 and the timer 12 is related to the voltage waveform of the input AC power supply 6 based on the power supply detection circuit 24, the motor 4 can always be operated with a fixed voltage waveform for each label 1. By keeping the operating time of this motor 4 constant, variations in the printing pitch between lines can be prevented.

Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, the configuration of the timer 12 in FIG. 5 is changed, and a digital switch 29 for setting the label feeding frequency and a counter 3
0 is provided, and this digital switch 29 and counter 30
An exclusive OR gate 31 is provided which receives the outputs of 1 and 3, and an AND gate 32, an inverter 33, and a NAND gate 34 which receives the 1 feed signal are connected to the output side of the exclusive OR gate 31.
A timer 37 is constructed by inputting the output of the AND gate 32 to an AND gate 36 together with the detection signal C via an inverter 35. Here, the terminal output of the flip-flop 22 is inputted to the reset terminal of the counter 30 via an inverter 38.

In such a configuration, in the case shown in FIG. 5, the triax 5 is used, and even if the timer 12 is made linear, the ON time of the motor 4 will not be linear, so when the user sets the timer 12, I don't know where the timer 12 is set in the 2.5Hz half wave. For example, if it is set at the peak voltage of the AC voltage, it will operate stably, but if it is near OV, the timer time will fluctuate slightly. In some cases, the frequency becomes 2.5Hz and 3.0Hz, and the printing pitch interval may change. However, since this embodiment uses a timer 37 having a digital switch 29 and a counter 30,
It is possible to count the number of detection signals C during the feed time and stop label feeding when the value matches the setting value on the digital switch 29 set by the user. This allows the user to easily make the settings.

Furthermore, a third embodiment of the present invention will be explained with reference to FIGS. 8 and 9. This example also uses timer 1.
2, in particular, instead of the digital switch 29 in Fig. 7, the CPU 8 and this CPU 8 are used.
The numeric keypad for setting the unit price of the scale stores the label feeding frequency, that is, the pitch, in its RAM.
Key group 3 including feed setting key, setting end key, etc.
9 are connected.

Such a configuration will be explained with reference to the flowchart shown in FIG. First, if a key is pressed and that key is a numeric keypad, that is the unit price.
Stored in RAM. On the other hand, if it is a feed setting key, then the numeric keypad is pressed and it is stored in the feed setting RAM, and the setting is completed by pressing the setting end key. Thereafter, the weight will be captured, the amount will be calculated, and it will be displayed. Subsequently, if the printing conditions are satisfied, printing of the first line and line 2 is performed, and after that printing, a feed pulse is generated and turned ON, then immediately turned OFF, and the 1st feed signal goes to L level. and,
A preset feed setting RAM is set, ie, latched externally, to feed the label for the set time. Therefore, when the 1 feed signal becomes H level, printing of the 2nd line 3 is performed, and then the feed pulse is turned ON and immediately turned OFF to perform label feeding.
Printing and label feeding for label 1 are completed.

In this way, using the numeric keypad etc. for unit price setting,
By storing the label feed frequency in the RAM in the CPU 8 and outputting the label feed signal, the frequency in the RAM is latched to the I/O port and the feed is stopped when the frequency matches the output of the counter 30. This allows the setting device such as the digital switch 29 shown in the figure to be omitted. Therefore, the label 1 is effective because the print pitch is determined by its production.

In the present invention, as described above, a power supply detection circuit is provided together with a timer, and the control is performed in relation to the input AC power supply, so that the operating time of the motor for the printing pitch can be kept constant, and thus the printing pitch of each label can be adjusted. Since the timer is equipped with a frequency setter and a counter, it is possible to easily set the frequency.Furthermore, the frequency can be stored in the RAM of the CPU 8 and set using a set of keys. This has the advantage that settings can be made without the need for a special setting device or the like.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a label showing a printing example, FIG. 2 is a circuit diagram showing a conventional example, FIG. 3 is a timing chart thereof, FIG. A circuit diagram showing an embodiment, FIG. 6 is a timing chart thereof, FIG. 7 is a circuit diagram showing a second embodiment of the present invention, and FIG. 8 is a block circuit diagram showing a third embodiment of the present invention. FIG. 9 is a flowchart. 1... Label, 4... Motor, 5... Triack (trigger rectifier), 6... Input AC power supply,
8...CPU, 12...Timer, 24...Power detection circuit, 29...Digital switch (frequency setting device), 30...Counter, 37...Timer, 3
9...Key group.

Claims (1)

[Scope of Claims] 1. A motor that feeds the label with respect to an input AC power source and operational control of this motor in a device that prints multiple lines of data on the same label by feeding the label in small pitches between lines. A timer is connected to a trigger rectifier for the motor, and a timer is provided to control the operating time of the motor via this trigger rectifier, and the feed signal output from the CPU is detected near the OV of the input AC power source. A label feed control circuit for a label printer, comprising a power detection circuit that drives the timer in synchronization with a signal. 2. A timer consisting of a frequency setting device and a counter, which counts the detection signal from the power supply detection circuit after synchronizing it with the feed signal, and stops label feeding when this count value matches the value set by the frequency setting device. A label feed control circuit for a label printer according to claim 1, characterized in that: 3 Consists of a CPU whose frequency is set and stored in its RAM using keys such as the unit price setting key, and a counter.The frequency in the CPU's RAM is latched externally, and when it matches the output of the counter, label feeding is stopped. A label feed control circuit for a label printer according to claim 1, characterized in that it is a timer.