JP3337330B2 - Position correction device for long film working means - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long film for correcting the position of a working device such as a printing device in order to prevent irregularities in a printing position and a sticking position of a tack label due to expansion and contraction of the film. The present invention relates to a position correcting device for a working means.

[0002]

2. Description of the Related Art Conventionally, for example, a tube-shaped label which is externally fitted to a container or the like is formed by cutting a long film which has been wound into a flat shape and cutting it into a predetermined length. It is common to have. Each label is provided with a character such as a date at a predetermined position by a printing device when the film is cut. As a device for applying characters to the film, a feeding device for feeding a long film cut to a predetermined length, a printing device for printing at a predetermined position on the film, a feeding device and a printing device are controlled. And control means for performing the control.

[0003]

However, in the above-mentioned apparatus, the feeding means for feeding a long film is controlled by the control means, and the control means corresponds to a preset distance (the length of one label). After paying out the film
Since the feeding unit is stopped and printing is performed by the printing device, depending on working conditions such as tension and outside air temperature at the time of feeding,
When the film is stretched, the printing position in the longitudinal direction of the film on each label varies, resulting in unevenness. As a result, there is a possibility that a reduction in commercial value may occur, a printing may overlap with other characters or designs, or a printing defect may occur due to a shift in the printing position when the printing position is the end of the film to be cut. there were.

When a labeling device for attaching a tack label to a film is used instead of the printing device, the labeling device supplies the tack label to the film at a fixed position and at a constant pitch. There was a drawback that the sticking position of the tack label was shifted.

[0005] The present invention has been made in view of the above problems, even when the long film is expanded and contracted, by correcting the print position location in response to expansion and contraction of the film, it is an object of the present invention to eliminate the irregularities of the printing position.

[0006]

The technical measures taken by the present invention to solve the above problems are as follows. That is, a long film 1 which is cut into a predetermined length is fed by the feeding means 4 and provided with a working means 18 for performing a work such as printing at a predetermined position of the film 1 at intervals. In the position correcting device of the work means for a film in the form of a scale, a mark sensor 5 for detecting a detection mark 6 provided at a predetermined position of the film 1 at a plurality of intervals, and the means 4 for feeding out are synchronized. Signal generating means 9 for generating a signal
And a control for calculating the shift of the input of the timing signal from the mark sensor 5 based on the signal from the signal generating means 9 and controlling the movement of the working portion 19 of the working means 18 in the feeding direction of the film 1 or in the opposite direction. Means 7 is provided.

The work means 18 comprises a printing device, and the control means 7 includes a first counter 12 for counting the feedback pulse signal from the feeding means 4 and a first counter 12 for counting the feedback pulse signal. A second counter 13 is provided for starting counting of a pulse signal when the set number N1 of false recognition prevention pulses is counted, and the control means 7 controls the second counter 13 until a timing signal from the mark sensor 5 is input. And the reference pulse number N set in advance.
3 and the printing device 18 is controlled based on the difference between the two pulse numbers N2 and N3.

Further, the working means 18 comprises a printing device, and the control means 7 is provided with a counter 12 for counting a feedback pulse signal from the feeding means 4. The control means 7 comprises a mark sensor. 5 and the number of actually measured pulses N2 counted by the counter 12 until the timing signal is input, and the power of the leading end of the film 1.
A comparison is made between the set pulse number N corresponding to the length L1 from the cut position C to the detection mark 6, and the printing device 18 is controlled based on the difference between the two pulse numbers N2 and N. It is in.

[0009]

According to the first aspect of the present invention, the control means 7 controls the actual film 1 based on the signal generated from the signal generation means 9 and the timing signal from the mark sensor 5 when the film 1 is conveyed by the feeding means 4. Is measured, and the amount of shift of the actual position of the detection mark 6 with respect to the position of the detection mark 6 when there is no expansion or contraction of the film 1 (input deviation of the detection mark 6) is calculated.

Further, the control means 7 is provided with a work unit 19 of the work means 18.
In the feed direction of the film 1 or in the opposite direction to the detection mark 6
The work unit 19 can perform printing or the like at a predetermined position of each film 1 to be cut.

In addition, according to the present invention, when the first counter 12 counts, the second counter 13 does not start counting. Therefore, before the mark sensor 5 detects the predetermined detection mark 6, The design of the film 1 can be prevented from being erroneously detected, and the printing device 18 does not malfunction.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a long film such as a stretch label formed by forming a synthetic resin film such as a soft and thin stretch film into a tubular shape, and the film 1 is fed in a flat folded state. The film can be fed out intermittently in the direction of arrow A by a film feed servomotor 4 for driving the roller 2 to rotate. The film 1
Is supplied to a conventionally known labeler machine 3, cut into a predetermined length L as shown in FIG. 3 in the labeler machine 3, expanded, and mounted in a container (not shown). .

Reference numeral 5 denotes a mark sensor for detecting detection marks 6 provided at predetermined regular intervals on the film 1, and is provided above the film 1. Reference numeral 7 denotes a sequencer as a control unit to which the mark sensor 5 is connected and which includes an arithmetic unit.
The set pulse number N corresponding to the length L1 from the cut position C at the leading end of the film 1 to the detection mark 6 is stored in advance, and when the mark sensor 5 detects the detection mark 6, the timing signal is sent to the sequencer 7 Is input to

8 is the film feed servo motor 4
The servo controller 8 receives a signal from an encoder 9 as a signal generating means connected to the servo controller 8. The servo controller 8 generates a feedback pulse signal generated from the encoder 9 according to the feed amount of the film 1 by the film feed servo motor 4. Is output to the sequencer 7 via the converter 10.

The sequencer 7 includes a first counter 12 for counting a feedback pulse signal from the servo controller 8 and a counter when the first counter 12 counts a predetermined false recognition prevention pulse number N1 smaller than the set pulse number N. And a second counter 13 for counting pulse signals.

That is, the second counter 13 counts the pulse signal (actually measured pulse number N2) at the same time when the first counter 12 finishes counting the false recognition prevention pulse number N1 until the timing signal from the mark sensor 5 is input. Then, the sequencer 7 compares the actually measured pulse number N2 with a preset reference pulse number N3 (the set pulse number N-the false recognition prevention pulse number N1), and calculates the shift amount of the input of the detection mark 6.

Reference numeral 15 denotes a servo controller provided with a pulse oscillator for generating a pulse train signal based on an output signal corresponding to the displacement of the detection mark 6 calculated by the sequencer 7. A correction signal is sent from the servo controller 15 to the servo driver 16. Is output.

Reference numeral 18 denotes a printing device as working means, which is supported by a servo motor 19a controlled by the servo driver 16 so as to be freely rotatable in the normal and reverse directions, and has a ball screw 18a arranged along the transport direction A of the film 1. And a printing machine 19 which is screwed to the ball screw 18a and is movable in the transport direction A of the film 1 or in the opposite direction. The printing device 18 is provided so as to be able to move up and down.
Is printed on the rear side (upstream side) of the detection mark 6.

Next, the case where the above-mentioned device is used will be described. As shown in FIG. 3, the film 1 is provided with a band-shaped non-printing clear portion 22 at a predetermined interval in the width direction thereof, and after the clear portion 22 is conveyed to the cut portion, the film 1 Is stopped, and the label 24 is formed by cutting the clear portion 22 at the time of the stop. As shown in FIG. 4, the set pulse number N corresponding to L1 in the length from the cut position C (clear portion 22) of the film 1 to the detection mark 6 is 850 pulses, and the first counter 12 counts. The number N1 of mis-recognition prevention pulses corresponding to the length L2 is input to the sequencer 7 in advance as 800 pulses and the reference pulse number N3 as 50 pulses.

As shown in FIG. 2, when the film 1 is cut,
The film feed start signal is output from the labeler main unit 3 to the film feed servomotor 4 (step), and the first counter 12 is reset (step). The servo controller 8 outputs a feedback pulse signal from the film feed servo motor 4 to the sequencer 7.

The first counter 12 of the sequencer 7 counts the feedback pulse signal. When the number of pulses reaches 800, which is the number N1 of false recognition prevention pulses, the first counter 12 stops counting (step). Then, the second counter 13 starts counting the number of pulses (step).

Next, when the mark sensor 5 detects the detection mark 6 (step), the timing signal is input to the sequencer 7, so that the sequencer 7
The actually measured pulse number N2 of the second counter 13 is compared with a preset reference count number N3 for calculation (step). For example, as shown in FIG.
If the pulse is a pulse, the reference pulse number N3 is 50 pulses, and the difference between the two is obtained. The sequencer 7 determines that the detection mark 6 is located ahead of the predetermined position by a distance corresponding to 20 pulses, and A correction signal is output to the servo controller 15.

Since the servo controller 15 outputs a correction signal to the servo driver 16, the servo driver 16 operates the servo motor 19a (step). The ball screw 18a is rotated by the servo motor 19a, and the printing machine 19
Moves forward (step). Further, after the film 1 stops, the printing machine 19 descends and prints a character 21 such as a date at a predetermined position on the film 1 (step). Note that the transport and stop of the film 1 is performed by detecting the detection mark 6 by the mark sensor 5 or another mark sensor.
The labeler main unit 3 controls the film feed servo motor 4. When the film 1 is stopped, the film 1 is cut to form a label 24 on which the characters 21 are formed.
24 is mounted on the container after being opened in the labeler body 3.

As described above, in this embodiment, a plurality of counters, ie, the first counter 12 and the second counter 13, are provided.
When the first counter 12 counts, the mark sensor 5
Is not read by the sequencer 7, the printing device 18 is not operated by the erroneous recognition signal from the mark sensor 5 when the first counter 12 counts. Therefore, there is an advantage that the malfunction of the printing device 18 can be prevented and the position can be surely corrected. Further, the detection mark 6 does not need to be a dedicated mark, and it is also possible to detect a predetermined position of a character, a picture, or the like printed on the film 1. In this case, the dedicated detection mark 6 becomes unnecessary. There are advantages.

In the above embodiment, the first counter 12
And the second counter 13 are provided.
A configuration in which a single counter 12 is provided may be used. That is, FIG.
As shown in (1), after reset, the counter 12 counts until the timing signal of the mark sensor 5 is input (step), and determines the actually measured pulse number N2 (step).

Further, the actually measured pulse number N2 and the set pulse number N
After the calculation, the printing device is moved in the same manner as described above (step). For example, the set pulse number N is preset to 800 pulses, and the actually measured pulse number N
In the case where 2 is 850 pulses, the actually measured pulse number N2 is 50 pulses larger than the set pulse N, so the ball screw 18a is reversed by the servo motor 19a in the opposite direction to the above, and the distance corresponding to 50 pulses is equivalent. This corrects the movement of the printing machine 19 rearward.

It is preferable that the movement correction of the printing machine 19 be performed when the film 1 is conveyed as described above in consideration of the efficiency of the work efficiency, but especially when the length L of the label 24 is short, after the film 1 is stopped. It is also possible to do.

Further, in the above embodiment, the steps of cutting, correcting, printing, and cutting the film 1 are performed for each cut of the film 1, but the correction of the printing apparatus is not performed for each cut. It is also possible to correct the printing device for each label or for a plurality of labels. In this case, it is possible to speed up a series of operations including a printing operation, and to convey the film 1 continuously. Can be printed.

In addition to the above-mentioned printing device, the working means includes:
A labeling device for attaching a tack label at a predetermined position on the film 1 with an interval, or a perforation forming means for forming a perforation for breaking on the film 1 may be used. Absent.

[0030]

As described above, according to the present invention, a mark sensor for detecting detection marks provided at regular intervals on a film at predetermined intervals and a signal are generated in synchronization with the feeding means. A signal generation unit, and a control unit that calculates a shift of an input of a timing signal from the mark sensor based on a signal from the signal generation unit, and controls movement of a work unit of the work unit in a film feeding direction or a reverse direction. Since it is provided, it is possible to control the movement of the working portion of the working means in the longitudinal direction of the film according to the amount of expansion and contraction in the longitudinal direction of the film, and it is possible to cut even a film with a large amount of expansion and contraction such as a stretch film It is possible to keep the printing position of each film and the position of the tack label etc. constant,
In addition, it is possible to prevent a printing failure and a sticking mistake of a tack label.

[0031] Further, in the control unit, a first counter for counting the feedback pulse signal from the means for the feeding, the count of the pulse signal when the first counter has counted the pre-set number has been misidentified prevented pulse Since the second counter is provided to start, even if the mark sensor erroneously recognizes a portion other than the detection mark, the operation of the working means can be prevented, and the position correction of the printing device can be reliably performed. Can be done.

[0032] However even before Symbol by single counter for counting the feedback pulse signal from the means for feeding, and controls the printer by counting the feedback pulse signal from the means for the feeding, printing apparatus with a simple structure There is an advantage that the position can be corrected.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the printing apparatus.

FIG. 3 is a plan view of the film.

FIG. 4 is an operation diagram showing the timing of one cut of the film.

FIG. 5 is a flowchart illustrating the operation of a printing apparatus according to another embodiment.

FIG. 6 is an operation diagram showing the timing of one cut of the film.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Film, 4 ... Film feed servomotor (means for feeding out), 5 ... Mark sensor, 6 ... Detection mark, 7
... Sequencer (control means), 9 ... Encoder (signal generation means), 12 ... First counter, counter, 13 ... Second counter, 18 ... Printing device (working means), 19 ... Printing machine (working section), A ... Transport direction, N ... Number of set pulses, N1 ...
Number of false recognition prevention pulses, N2: actual measurement pulse, N3: reference pulse number

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B31B 1/88 321 B65B 61/02

Claims (2)

(57) [Claims] An elongate film (1) cut to a predetermined length is fed out by a feeding means (4), and the film (1) is fed out.
A printing device for performing printing at predetermined intervals at intervals.
In the position correcting device for a long film working means provided with a position (18), a mark for detecting a detection mark (6) provided at a predetermined position of the film (1) at a plurality of intervals. A sensor (5), a signal generating means (9) for generating a signal in synchronization with the feeding means (4), and a signal from the mark sensor (5) based on a signal from the signal generating means (9). Calculate the timing signal input deviation,
A control means (7) for controlling the movement of the working section (19) of the printing device (18) in the direction of feeding the film (1) or in the opposite direction is provided , and the control means (7) includes
Count the feedback pulse signal from stage (4)
A first counter (12) and the first counter (12)
Count the preset number of false recognition prevention pulses (N1)
Second counter that starts counting pulse signals when
(13), and the control means (7)
The second until the timing signal from the circuit (5) is input.
Number of measured pulses counted by counter (13)
(N2) and a preset reference pulse number (N3)
And based on the difference between the two pulse numbers (N2) and (N3),
And a printing device (18) for controlling the printing device (18) . 2. A long film cut to a predetermined length.
(1) is fed out by the feeding means (4), and the film (1) is fed out.
A printing device for performing printing at predetermined intervals at intervals.
Of the working means for a long film with a position (18)
In the normal device, a plurality of films are provided at predetermined positions of the film
For detecting the detection mark (6) provided at an interval.
Mark sensor (5), and the feeding means (4)
Signal generating means (9) for generating a signal in synchronization with the signal;
The mark sensor based on a signal from the generating means (9);
Calculate the shift of the input of the timing signal from-(5),
Feed the film (1) through the working unit (19) of the printing device (18)
Control means (7) for controlling movement in the direction or in the opposite direction is provided
And the control means (7) includes the feeding hand
Count the feedback pulse signal from stage (4)
Counter (12) is provided, and the control means (7)
Or the timing signal from Kusensa (5) is entered
The number of measured pulses counted by the counter (12)
(N2) and the cut position (C) at the tip of the film (1)
Setting corresponding to the length (L1) from the detection mark to the detection mark (6)
The pulse number (N) is compared with both pulse numbers (N2),
(N) to control the printing device (18) based on the difference
The position correction apparatus of the elongated film working means formed by.