JPS6131915B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a label feed control device in a label printing machine that prints data from a measuring section on a label attached to a mount and then issues the label.

An example of a conventional label feed control device will be explained based on FIGS. 1 to 4. First, labels 2 of a predetermined size are adhered to a long mount 1 at equal pitches, and the mount 1 is wound into a roll and set in the label supply section 3. Then, the mount 1 passes through a printer 4, a peeling plate 5 serving as a peeling section, and a feed roller 7 serving as a feeding section driven by a motor 6, and reaches a mount winding section 8. A photoelectric detector 9 is provided on the front side of the printer 4, and a label presence/absence detector 1 is provided at the tip of the peeling plate 5 to detect the presence or absence of the peeled label 2.
0 is set.

An I/port 14 is connected to the CPU 13 to which the weighing section 11, the printer 4, and the display and operation section 12 are connected, and the label presence/absence detector 10
is connected to the I/port 14 via the label presence/absence detection AMP 15, and is also connected to the paper feed controller 16.
This paper feed controller 16 is connected to the motor 6 and also has a variable resistor 17.
The detector 9 is connected via a label detection AMP 18 equipped with a label detection AMP 18.

Therefore, the label presence/absence detector 10 detects that when the label 2 does not exist, the D signal is at H level, and this D signal is at H level.
When an operation command, ie, signal A, is issued on the condition that the signal is at H level, paper feed controller 16 generates signal C (H level), drives motor 6, and feeds paper 1. At this time, signal C
is also given to the CPU 13 from the I/port 14, and controls the operations of parts that should not operate during paper feeding. By this feeding of the mount 1, the label 2 is peeled off and protrudes, causing the output signal D of the label presence/absence detector 10 to become L level. When the detector 9 detects the position as described later and generates the signal B on the condition that the signal D is at the L level, the signal C of the paper feed controller 16 goes to the L level, and the motor 6
At the same time, the prohibition command in the CPU 13 is canceled.

Therefore, the detector 9 detects the light transmittance of the mount 1 and the label 2, but as shown in FIG. When the labels overlap, label 2
There are three types of light when the light passes through the printing section 20 as well.
Specifically, signal B is generated from mount 1.
However, since this detects the difference in light intensity between only the mount and when mount 1 and label 2 are overlapped, the following problem arises. That is, if the label 2 has a high light transmittance, the difference becomes extremely small and a label 2 with extremely high detection accuracy is required. Further, as described above, if the label 2 has a printed part 20 containing the store name, etc., the transmittance of this part will be low, but there will be a large difference from the part of the label 2, which may lead to detection errors. Furthermore, there is also the trouble of having to adjust the variable resistor 17 to adjust the detection level every time the thickness of the mount 1 changes. Moreover,
When the size of the label 2 changes, the detector 9
The position of this detector 9 has to be changed.
Since the signal B from the printer 4 also serves as the operating standard for the printer 4, printing must be performed a plurality of times to determine the optimum position, resulting in the problem that the label 2 is wasted.

Therefore, the present applicant has proposed a system that reliably detects the label and accurately determines its stopping position in Japanese Patent Application No. 55-69825 (see Japanese Patent Application Laid-open No. 57-1645). . According to this,
In FIG. 1, the detector 9 is omitted, and the detector 10 has a function of detecting the leading edge of the label 2 and a function of detecting the presence or absence of the label, and feeds a fixed amount based on the detection of the leading edge. However, since this detector 10 is provided in the front part of the peeling plate 5, if a finger is inserted into the detector 10 to take out the label 2 during label printing, the label 2 will be removed. Before the leading edge is actually detected by the detector 10, the leading edge is erroneously detected by the finger, and from that point on, the label is fed a certain amount, and the label cannot be fed normally. Put it away. This causes a shift in the printing position of the next label 2 by the printer 4. Therefore, the next label 2 to be issued is wasted.

The present invention has been made in view of these points, and provides a label that takes advantage of the leading edge detection method of the label while minimizing deviations in label feeding when an erroneous signal is generated by a finger or the like. The purpose is to obtain a feed control device.

An embodiment of the present invention will be explained based on FIGS. 5 to 12. Components that are the same as those shown in FIGS. 1 to 4 are designated by the same reference numerals, and description thereof will be omitted. First, a label detector has a leading edge detection function for detecting that the leading edge 21 of the label 2 has arrived at the front part of the peeling plate 5 in the running path of the mount 1, and a presence/absence detection function for detecting the presence or absence of the label 2. A motor 6 consisting of an induction motor and a belt 23 are provided.
A slit plate 26 on which a large number of slits 25 are arranged on the circumference is attached to the shaft 24 of the feed roller 7 which is connected to the shaft 24, and a slit detector 27 is placed facing the slit plate 26 to detect the slits 25.
It has been established. Thus, a second label detector 28 is provided at a position in the label advancing direction of the label detector 22. This second label detector 28 has the same detection function as the label detector 22.

Leading edge detection AMPs 29 and 30 are connected to the label detector 22 and the second label detector 28, respectively, and an I/O module connected to the CPU 13
A paper feed controller 31 to which a motor 6 is connected is connected to the port 14 . This paper feed controller 31 is connected to a feed amount setting device 32 such as a digital switch, and also has a slit detection function.
The slit detector 27 is connected via the AMP 33. Therefore, the standard feed amount L _A corresponding to the feed amount from the start of paper feed to the detection of the leading edge 21 of label 2 by the label detector 22 during normal liner feed is set, and paper feed from I/port 14 is started. Slit detection AMP33 based on signal A
An auxiliary feed means 34 is provided which performs a counting operation of the standard feed amount L _A based on a signal from the auxiliary feed means 34 . and,
The leading edge detection AMPs 29 and 30 and this auxiliary feeding means 34 are connected to the input side, and the leading edge detection AMPs 29 and 30 are connected to the input side.
When the leading edge detection signal is generated earlier from the leading edge detection AMP 29, it is directly output to the paper feed controller 31, and when the leading edge detection AMP 30 generates the leading edge detection signal earlier than the leading edge detection AMP 29, the auxiliary feeding means 34 performs a counting operation. A gate means 35 is provided that waits for the completion and outputs the output to the paper feed controller 31.

As a result, during normal label issuance, when label 2 is not present in the label detector 22, signal B is at H level, but when signal B is at H level, signal A is generated from the CPU 13 side. Then, signal D is sent from the paper feed controller 31.
(H level) is generated, the motor 6 is operated to feed the mount 1, and a signal D is sent to the CPU as a prohibition signal for parts that should not be operated during paper feeding.
Give to 13. When the mount 1 is fed, the label 2 is peeled off and protrudes from the peeling plate 5, and the leading edge 21 of the label 2 is finally detected by the label detector 22. At the same time as this detection, leading edge detection AMP29
The output signal B from is at L level. At this time,
Since the label detector 22 detects the leading edge 21 earlier than the second label detector 28, the output signal B passes through the gate means 35 and is output as a signal B', and this signal B' causes the paper feed controller 31 to Inside, the signal C from the slit detector 27 is started to be counted, and when the count reaches the number preset by the feed amount setting device 32, the signal D becomes L level and the motor 6 is stopped. Therefore,
After the leading edge 21 of the label 2 is detected by the label detector 22, the label 2 is fed out a certain amount and then stopped. Therefore, the reference signal is the detection of the leading edge 21, and unless the label 2 is transparent, the transmittance is large;
In addition, since it has nothing to do with the printed portion 20 of the label 2, extremely accurate detection can be achieved.

Further, unless label 2 is removed, signal B remains at L level, so signal A is not output, other parts do not operate, and label 2 is not issued twice. Therefore, the label detector 22 functions as a conventional label presence/absence detector.

By the way, if we consider a case where a finger is inserted into the label detector 22 before the leading edge 21 of the label 2 reaches the label detector 22 during label issuance, the signal B becomes L as in the case of leading edge detection. level. However, at this time, contrary to the normal feeding from the label detector 22 side to the second label detector 28 side, a finger is detected by the second label detector 28 located outside, and the signal B ₂ becomes L earlier than the signal B. level. As a result, the gate means 35 continues the prohibited state and switches to label feeding by the standard feeding amount _LA . When the counting operation of the auxiliary feeding means 34, which has been operating since the start of label feeding, is completed and the label has been fed by the standard feeding amount _LA , at this point it is assumed that the leading edge has been detected, and a signal is sent from the gate means 35. B' is output, and the paper feed controller 31 performs constant feeding. Even if an erroneous signal is output from the label detector 22 due to a finger or the like, the second label detector 28
Since the label is checked and switched to the standard feed amount _LA , the error in label feeding compared to normal leading edge detection is reduced.

Next, a more detailed explanation will be given based on FIG. 8. What is shown in FIG. 8 is merely a concrete implementation of each part of the block shown in FIG. 7, and the basic operation is completely unchanged. First, label detector 2
2 is composed of an LED 36 and a phototransistor 37, and the LED 36 is connected to an oscillator 39 which is also connected to a conversion circuit 38 via a driver 40. Further, the phototransistor 37 is connected to the conversion circuit 38 via a waveform shaping circuit 41. The oscillation frequency of the oscillator 39 is about 3 KHz, and the LED 36 periodically emits pulsed light, and the conversion circuit 38 converts the pulsed output of the phototransistor 37 into DC H and L levels. That is, when label 2 does not exist, the output is at H level, and when label 2 exists, the output is at L level. The purpose of using pulsed light emission in this way is to prevent the influence of ambient light and to increase reliability by intensifying the light from the LED 36 with thin pulses since the LED 36 and the phototransistor 37 are far apart. On the other hand, the second label detector 28
It also consists of an LED 42 and a phototransistor 43, and is similarly provided with a conversion circuit 44, an oscillator 45, a driver 46, and a waveform shaping circuit 47.

Further, the conversion circuit 38 is connected to an AND gate 48, and this AND gate 48 is ORed to a down counter 49 which is a main component of the quantitative feeding means.
They are connected via gate 50. A feed amount setting device 32 is connected to this down counter 49. Further, an inverter 51 is connected to the input side of the OR gate 50, and an I/port 14 and a flip-flop 5 are connected to the input side of the inverter 51.
The output section Q of No. 2 is connected thereto. This flip-flop 52 is connected to the I/port 14 and the down counter 49, respectively. Further, the output of the flip-flop 52 is connected to a driver 53.
It is connected to the motor 6 via.

On the other hand, the slit detector 27 provided on the slit plate 26 includes an LED 54 and a phototransistor 55.
is connected via a waveform shaping circuit 56 to a differentiation circuit 57 which differentiates the leading and trailing edges of the pulse to generate twice the number of slits 25, and this differentiation circuit 57 is connected to the down counter 49.

Thus, the signal from the inverter 51 is given as a load signal, and the differentiating circuit 57
Down counter 59 which is connected via AND gate 58 and becomes the main component of auxiliary feeding means 34
is provided. The output side of this down counter 59 is connected to the input side of the AND gate 58 via an inverter 60. Further, a setting device 61 for setting the standard feed amount _LA is connected to the down counter 59. The signal from the conversion circuit 38, the signal obtained by inverting the output of the conversion circuit 44 by the inverter 62, and the inverter 51
An AND gate 64 is provided which receives as input a signal obtained by inverting the output of . The output part Q of this flip-flop 65 is connected to the above-mentioned
It is input to AND gate 48. Further, an AND gate 68 is provided which receives as inputs a signal from the output part Q of the flip-flop 65 and a signal obtained by inverting the signal from the down counter 59 by an inverter 67, and its output side is input to the OR gate 50. There is.

Here, the number of pulses corresponding to the constant feed amount S shown in FIG. 9 is set in the feed amount setting device 32,
In the setting device 61, a standard feed amount L _A corresponding to the feed amount from the start of paper feed shown in FIG. 9b to the detection of the leading edge of the label 2 shown in FIG. 9c is set as the number of pulses. That is, in FIGS. 9b and 9c, if the feed amount at a certain issuing time is L _A ', it is set so that this L _A ' is within the range of L _A ±α (α is the error).

Note that in FIGS. 9 and 11, the printer 4 is a data printing unit 69 using a line printer or the like.
and a stamp 70 such as a product name stamp.

Therefore, when label 2 is removed and there is no label 2 in the label detector 22 in the state shown in FIG. The contents of the feed amount setter 32 are loaded into the counter 49. Of course, down counter 4
9 is loaded when the output of OR gate 50 becomes H level, so it can also be considered as a preset. In this state I/
When the feed signal is output from the port 14, the flip-flop 52 is set, the output of the inverter 51 is set to L level, and the driver 53 applies AC 100V to the motor 6. As a result, the motor 6 rotates to feed the mount 1, and at the same time the slit plate 26 rotates, so that a pulse is generated from the phototransistor 55, and this pulse is applied to the down counter 49 as a clock signal. However, since the output from the conversion circuit 38 is still at the H level and the output from the AND gate 48 is at the H level, the contents of the down counter 49 remain unchanged. On the other hand, the down counter 59 is unloaded due to the output of the inverter 51 which has become L level with the start of this sheet feeding.
In accordance with the input pulse from the phototransistor 55 side, the down counter 59 performs a counting operation of subtracting its contents.

When the label 2 comes to the position shown in FIG. 9c, the leading edge 21 is detected by the label detector 22, and the output from the conversion circuit 37 becomes L level.
At this point, second label detector 28 has not detected label 2 and inhibits AND gate 64. Therefore, flip-flop 65 is not set.
AND gate 68 remains at L level, AND
Since the gate 48 becomes L level, the load on the down counter 49 is released. That is, from when the output of the conversion circuit 38 becomes L level, when a pulse from the slit detector 27 side is input, the contents of the down counter 49 are subtracted, and when it reaches zero, the flip-flop 52 is reset. As a result, the motor 6 stops and the down counter 4
9,59 is loaded again.

In this way, after the leading edge 21 of the label 2 is detected as shown in FIG. 9c, it is fed by a certain amount S to the state shown in FIG. 9d, and then the feeding of the mount 1 is stopped.
9b to 9d show normal label 2 feeding, and the timing at that time is as shown in FIG. 10.

If feeding of the mount 1 is started from the position shown in FIG. 11b and a finger or the like is inserted into the label detector 22 and the second label detector 28 in the state shown in FIG. Although the edge 21 has not been reached, the label detector 22 operates and the output of the conversion circuit 38 becomes L level. However, in such a case, the second label detector 28 located outside
, the finger is detected faster and the output of the conversion circuit 44 is L.
level. This opens the AND gate 64, sets the flip-flop 65, and
Since the output of AND gate 68 becomes H level,
Even if the AND gate 48 goes low, the load on the down counter 49 is not released. Then, the mount sheet feeding that is not controlled by the down counter 49 continues. In parallel with this, the down counter 59 continues subtraction counting, and the down counter 59
When the content of 9 becomes zero, the AND gate 68 goes to L level and the down counter 49 is unloaded. As a result, the label 2 is fed by the standard feed amount L _A from the start of feeding shown in FIG. 11b to the state shown in FIG. Amount S
will be sent only. Therefore, if this embodiment is not used, only a certain amount S is sent as shown by the dotted line in FIG. 11c, which causes a large error, but in the case of this embodiment, As shown, since the label is fed by a certain amount S from a state where the error from the original leading edge detection is small, the influence on the next label 2 to be located at the printing position is also small. FIG. 12 shows a timing chart at this time.

In addition, in the above example, the down counters 49, 59
However, instead of these, inexpensive up counters may be used, and the output may be made by comparators that compare the contents of the setters 32 and 61, respectively.

In addition, a fixed amount feeding means uses a motor that rotates in synchronization with the power supply frequency as the drive unit, and determines the feed amount by counting the power supply frequency,
In the auxiliary feed means 34 as well, a standard feed amount L _A may be set according to the power frequency and the standard feed amount L A may be sequentially subtracted. Further, a pulse motor rotated by a signal from an oscillator is used as a drive unit, and a fixed amount feeding means is used which determines the feed amount by counting pulses from the oscillator, and the auxiliary feeding means 34
Also, the standard feed amount L according to the oscillator pulse
It is also possible to set _A and have it sequentially subtracted.

As described above, the present invention detects the leading edge of a label using a label detector and sends a certain amount of label.
Since the auxiliary feeding means, the second label detector, and the gate means are used together, even if an erroneous signal is generated from the label detector due to a finger or the like, the error in label feeding can be corrected by checking with the second label detector and switching to standard feeding. This has the effect of minimizing the deviation of the printing position with respect to the next label and preventing waste of labels.

[Brief explanation of the drawing]

Figure 1 is a side view of a conventional device, Figures 2a and b are side views showing a mount with a label attached and its transmittance, Figure 3 is a block diagram, and Figure 4 is its timing chart. FIG. 5 is a side view of a device showing an embodiment of the present invention, FIG. 6 is a rear view of the feed roller portion,
Fig. 7 is a block diagram, Fig. 8 is a detailed block diagram of Fig. 7, Fig. 9 is an explanatory diagram showing a normal label feeding state, Fig. 10 is its timing chart, and Fig. 11 is an abnormal state. FIG. 12 is an explanatory diagram showing the label feeding state and a timing chart thereof. DESCRIPTION OF SYMBOLS 1... Mounting paper, 2... Label, 5... Peeling plate (peeling part), 6... Motor (drive part), 7... Feed roller (feeding part), 21... Leading edge, 22... Label detector, 28
...Second label detector, 34...Auxiliary feeding means, 35
...gate means, 49...down counter (quantity feeding means).

Claims (1)

[Claims] 1. A label detector that is provided with a drive unit that drives a feeding unit that feeds a mount with a label attached thereto and a peeling unit that peels off the label, and that faces the peeling unit and detects the leading edge of the peeled label. and a quantitative feeding means for controlling the operation of the drive unit so as to feed the liner by a certain amount after the leading edge is detected by the label detector, and the label is fed from the start of paper feeding during normal liner feeding. A standard feed amount corresponding to the feed amount up to the leading edge detection is set, and an auxiliary feeding means is provided which performs a counting operation of this standard feed amount at the start of paper feeding. Two label detectors are provided, and when the second label detector outputs a leading edge detection signal earlier than the label detector, the auxiliary feeding means continues to feed the backing paper by the standard feed amount. A label feeding control device characterized in that a gate means is provided for operating the quantitative feeding means after the feeding of the liner is completed.