JPS5952086B2 - Automatic pattern matching device in automatic packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an automatic packaging machine for packaging items using continuous packaging material, which is capable of automatically setting a cam in advance so that the continuous packaging material is fed at a predetermined constant pitch. This invention relates to an automatic pattern matching device in a packaging machine.

Conventionally, automatic pattern matching means in this type of automatic packaging machine include, as is well known, a pulse generator that generates a predetermined number of pulses per rotation in response to the rotational movement of the sealer, and a register represented on the packaging material. A phototube that detects the mark and emits a register mark detection signal, and a phototube that counts the pulses and compares the counted number with the register mark detection timing to determine the transport speed of the packaging material, for example, in Japanese Patent Laid-Open No. 52-13078. There are various types of devices using a counter for control using a follow-up motor, etc. as described in the above publication, and as an example, a means as shown in FIG. 3 has been developed by the inventor of the present invention.

That is, the device shown in the figure starts counting the number of pulses like a counter H at the same time as it receives the first register mark detection signal F, and also outputs a timing cam output G.
After that, each time the count reaches a predetermined count corresponding to the rotation of the sealer, the count is reset and counting of the number of pulses is started again, and each time the count is reset and started, the timing cam output G is output. The timing cam output G and the register mark detection signal F are compared and if the timings match, the packaging material is properly transferred. If there is a timing difference between the two, a tracking motor or the like is used to bring them into alignment and control the transport speed of the packaging material.
However, with the above method, when the operation is carried out for a long time, for example, as shown in FIG. In case 5, the counter malfunctions due to the influence of the noise, and the timing cam output G is output earlier than the original timing cam output I. Each deviation X was accumulated one after another, and at the time point C, a situation occurred in which the timing cam output G was output 3X earlier than the actual timing cam output I. Therefore,
In the above-mentioned conventional method, due to the influence of the noise, the output timing of the timing cam output differs significantly from the original output timing, resulting in a fatal problem in which normal operation of the packaging machine cannot be continued. The present invention was invented in view of the above-mentioned problems, and its purpose is to prevent malfunctions from accumulating even if noise is picked up during the operation of a packaging machine and malfunctions occur in the pulse counting of the counter. It is possible to output a timing cam output at the same time, thereby making it possible to keep the feeding pitch of the packaging material of the packaging machine constant and to properly match the pattern of the packaging material.

The present invention is configured to achieve the above object,
The gist of its configuration is that it starts counting the number of pulses by receiving an on signal from the pulse generator, stops counting the number of pulses by receiving a register mark detection signal from the phototube, and stores the counted number at the time of stopping. At the same time, each time the pulse generator receives a second and subsequent ON signal, it starts counting the number of pulses, and when the counted number reaches the stored count number, outputs a timing cam output. There is a point where it becomes
Therefore, it is necessary to compare the timing of the timing cam output and the register mark detection signal to match the timing of both.If the packaging material transfer speed of the packaging machine is controlled, the rotational operation of the sealer and the packaging material transfer can be controlled. This means that the patterns of the packaging materials can be matched.

In addition, even if noise is picked up during the counting of the number of pulses and a malfunction occurs in the counting, the count including the malfunction will reach the initially stored count number. The next counting operation is performed independently of the previous counting operation based on the ON signal of the pulse generator, which is completely unaffected by noise. There is no possibility that the error will gradually become larger as it accumulates during the operation.Therefore, the error will not accumulate in the timing cam output timing that is output by the predetermined count of the number of pulses.
Since the present invention has the above configuration and operation, it has the following effects.

That is, as described above, even if noise is picked up during the operation of the packaging machine and malfunction occurs in counting the number of pulses, the malfunction can be compared with the register mark detection signal without affecting subsequent counting operations. Since it is possible to completely eliminate the accumulation of errors in the output timing of the timing cam output, there is no need for a large error to occur in the output timing of the timing cam output every time noise is picked up, unlike in the past. The special effect of being able to reliably match the patterns of packaging materials was obtained.

As described above, the present invention sets the synchronization between the timing cam output and the register mark detection signal by counting the number of pulses and counting the number of pulses from the reception of the first on signal from the pulse generator to the time when the first register mark is detected. A new circuit configuration that has never existed in the past, in which the count is performed by memorizing the number, and the start of each pulse count is based on the on-signal of the pulse generator obtained from the regular rotational movement of the sealer, It goes without saying that this system has achieved the remarkable effects mentioned above, and has the advantage that there is no need to perform complicated cam setting work when starting the operation of the packaging machine.
Its practical value is enormous.

Embodiments of the present invention will be described below according to an example shown in the drawings. That is, in FIG. 1, 20 supplies the packaging material 2 (film) loaded in the film holder 1 to the film feed roller 6 via guide rollers 3, 4, and 5, and also feeds the packaging material 2 to the film feed roller 6. The article 10 to be packaged is transferred from the roller 6 to the former 8 via the adjustment guide roller 7 and is separately supplied into the former 8, and then the article 10 and the packaging material 2 are transferred to a vertical conveyor. 11, 11, the packaging material 2 is pulled out between the next pair of upper and lower horizontal sealers 19 to thermally melt and cut the packaging material 2.

In this embodiment, a pattern matching device is attached to an automatic packaging machine having such a configuration. A predetermined number of pulses per revolution, e.g. 360
Generates a pulse. A detector 14 detects the pulses generated by the pulse generator 13 and sends a signal to a counter to be described later, and a phototube 15 sends a register mark detection signal every time a register mark shown on the packaging material 2 is detected.

16 starts counting the number of pulses of the pulse generator 13 at the same time as receiving one specific pulse signal, that is, an ON signal transmitted from the detector 14 of the pulse generator 13,
In addition, upon reception of the register mark detection signal of the phototube 15, the counting of the number of pulses is stopped and the counted number at the time of stopping is continued to be stored, and each time the second and subsequent ON signals of the pulse generator 13 are received, the counting of the number of pulses is stopped. This figure shows a counter having a circuit configuration that starts counting the number of pulses, stores the counted number, and outputs a timing cam output when the counted number is reached.

] 7 compares the timing of the timing cam output in the counter 16 and the register mark detection signal, and increases or decreases the packaging material transfer speed of the feed roller 6 and the vertical feed conveyors 11, 11 so that the timings of both coincide. A follow-up amplifier is shown which controls the follow-up motor 18 in order to increase the speed, and 19 is a differential gear. Since this embodiment has the above-mentioned configuration, first, the automatic four-packing machine 20
When the pulse generator 13 is activated, the pulse generator 13 generates a predetermined number of pulses, for example, 360 pulses per revolution of the horizontal sealer 19.
Upon receiving the ON signal from 4, the counter 16 starts counting as shown in FIG. The count at C is stopped and the count number Y continues to be stored.

However, as soon as the counter 16 receives the second ON signal, it starts counting the number of pulses as shown in D in the figure, and when the count reaches Y, it outputs a timing cam of a predetermined width as shown in E. It will be output. Therefore, if the rise of the timing cam output coincides with the second register mark detection signal shown in FIG.
Thereafter, the operations described above are repeated in sequence. Further, if a deviation occurs between the rise of the timing cam output B and the register mark detection signal B, the follow-up amplifier 17 and the follow-up motor 18 are activated to automatically adjust the timing. be.
Furthermore, as shown in Figure 2, even if noise is picked up at this point and an error occurs in the count number, the timing cam output timing shift will only occur within that range, and the next count will only start when the on signal A is used. Since it is based on the reference, there is no possibility that the deviation in the output timing of the timing cam output due to the noise is carried over to the next section and accumulated sequentially. It should be noted that the specific configurations of the pulse generator, the phototube, and the means for increasing/decreasing the transport speed of the packaging material according to the present invention can all be changed in design within the scope of the present invention, and the specific electric circuit of the counter can be changed. The design of the configuration and the configuration of the packaging machine can be changed as well.

[Brief explanation of the drawing]

FIG. 1 is a schematic mechanical diagram showing an embodiment of an automatic pattern matching device in an automatic packaging machine according to the present invention. FIG. 2 is an explanatory diagram of the counting operation of the counter. FIG. 3 and FIG. 4 are explanatory diagrams of counting operation showing a conventional example. 13...
...Pulse generator, 14...Detector, 15.
...Phototube, 16...Counter.

Claims (1)

[Claims] 1 a pulse generator 13 that generates a predetermined number of pulses per rotation of the sealer 9; a phototube 15 that detects a register mark shown on the packaging material 2 fed out by activation of the automatic packaging machine and emits a register mark detection signal; In an automatic pattern matching device for an automatic packaging machine provided with a transfer speed control means for increasing or decreasing the transfer speed of the packaging material 2, counting of the number of pulses is started upon reception of an ON signal from the pulse generator 13, and the photocell Upon reception of the register mark detection signal No. 15, the counting of the number of pulses is stopped, and the counted number at the time of stopping is continued to be stored, and the number of pulses is counted each time the second and subsequent ON signals of the pulse generator 13 are received. A counter 16 is provided having a circuit configuration that outputs a timing cam output when the count number reaches the stored count number, and the timing cam output is made to coincide with the timing of the register mark detection signal. An automatic pattern matching device for an automatic packaging machine, characterized in that the transfer speed of the packaging material can be increased or decreased.