JPH0219209A - Packing apparatus - Google Patents

Abstract

PURPOSE:To simplify and facilitate initial setting by providing a rotary encoder between a lower end sealer and a drive motor while providing a gearbox and a quick feed clutch between the drive motor and a film feed roller and connecting the rotary encoder to a photoelectric tube by a controller. CONSTITUTION:A drive motor 21 imparts rotation to an upper end sealer 4, a lower end sealer 4' and film feed rollers 3, 3', and a rotary encoder 32 is provided between said motor and the lower end sealer 4' while a gearbox 33 and a quick feed clutch 34 are provided between the motor and the film feed roller 3'. A photoelectric tube 14 and the rotary encoder 32 are respectively connected to a controller 13 electrically and the quick feed clutch 34 is operated by the controller 13 and the film feed roller 3' is rotated to increase a speed and the shift during driving is corrected to perform initial setting.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention detects cut marks on a packaging film in a packaging device, cuts a long strip of packaging film at a predetermined position, and cuts an object to be packaged. This invention relates to improvement of a packaging device for packaging.

BACKGROUND OF THE INVENTION An overview of a conventionally used three-sided seal packaging device will be explained.

The packaging film 2, on which cut marks 1 are printed as marks for cutting into widthwise sieves at predetermined intervals, is sent out by film feed rows 23, 3' and moves in the direction of the arrow. The packaging device is equipped with a supply device for the object to be packaged, a bag making device that makes bags from the packaging film, and a vertical sealing device that continuously seals the edges of the made packaging film in the longitudinal direction. . The upper end sealer 4 and the lower end sealer 4' are rotated synchronously by the upper end sealer shaft 5 and the lower end sealer shaft 5', and when the upper end sealer 4 and the lower end sealer 4' engage with each other after one rotation, , a cutter 6 that seals the packaging film 2 in the transverse direction and is built into the upper end sealer 4 and the lower end sealer 4', respectively.
The cut is made at an angle of 6', and the cutting position coincides with the position of cut mark 1. The lower end sealer shaft 5' is rotated by a main drive motor 7, and the main drive motor 7 rotates the packaging film 2 through a continuously variable transmission 8 and a fast-forward clutch 9.
The film feed roller 3' that sends out the film is rotating. A control cam 10 is mounted on the lower end sealer shaft.
Cam detection device 12 that detects hatch 11 of control cam 10
The signal of the cam detection device 12 is sent to the controller 13, which checks the electric signal from the phototube 14 which detects the cut mark 1 of the packaging film 2, and controls the feeding speed of the packaging film 2. It is configured to operate a fast forwarding clutch 9.

Figure 7 shows a sequence chart, in which the control cam l
Since O is formed in a semicircular shape with peaks and valleys of 180 degrees,
As the control cam 10 rotates, the cam detection device (
The cam signal 15 from the limit switch) 12 is shown. 16 is a phototube signal when the cut mark 1 of the packaging film 2 is detected, and when the phototube signal 16 overlaps when the cam signal 15 is turned on, the controller 13
The fast forward clutch 9 is actuated. The fast feed clutch 9 causes the film feed row 23 of the packaging film 2 to
The rotation speed of ' is increased, the packaging film 2 is rapidly fed, and the cutting position of the packaging film 2 by the upper end sealer 4 and the lower end sealer 24' is adjusted.

Problems to be Solved by the Invention Conventionally used packaging devices have problems such as when first setting the packaging film 2 on the packaging device, or when trying to package objects with different shapes. When making these initial settings, manual adjustments were required, which was inconvenient. That is, the boss portion 1 of the control cam 10 is
A saw blade-like serration 18 is machined on the end face of 7, and the serration 18 is always engaged with the spring 19, so that the spring 1
The roller 2 of the cam detection device 12 is disengaged from the engagement of the serrations 18 against the
Position 2. At this time, a clutch 23 is interposed between the control cam 10 and the lower end seam 24', and the control cam 10 always rotates as the main drive motor 7 rotates. , the upper end sealer 4, and the lower end sealer 4' may not be subjected to rotational force. After the relative positions of the control cam 10 and the cam detection device 12 are set in this manner, the cut mark 1 of the packaging film 2 is aligned with respect to the other phototube 14. The phototube 14 is located at the upper end sealer 4.
, and is set at a location spaced apart from the lower end seam 24' by a predetermined distance, and the main drive motor 7 is driven in an inching operation so that the cut mark 1 of the packaging film 2 coincides with the position of the phototube 14. If the position of the cut mark 1 coincides with the phototube 14 serving as the cut mark detection device, preparation is complete. However, manual adjustment in such initial settings is not possible with the control cam 10 and the cam detection device 12.
The zero alignment operation and the operation of aligning the cut mark 1 of the packaging film 2 with the phototube 14 have to be performed each time as initial settings, and these operations are extremely troublesome.

Means for Solving the Problems The present invention eliminates the above-mentioned drawbacks by providing a packaging device that can automatically perform initial settings without manual intervention, and in which the lower end roller A rotary encoder is provided between the drive motor and the film feed roller, and a transmission and a fast-forwarding clutch are provided between the drive motor and the film feed roller. It is designed so that it can be processed electrically using electrical signals from the controller.

action Initial setting of packaging film is simple and easy.

The packaging film 2 of the embodiment is fed out from the material reel 24 by film feeding rollers 3, 3' and supplied to a bag making machine 25. On the other hand, the object to be packaged 26 is conveyed by an entrance conveyor 27 and pushed into the bag making machine 25. The packaging film 2 made into a bag by the bag making machine 25 moves in the direction of the arrow with the object to be packaged 26 inside, and the packaging film 2 is sealed by the vertical seal roller 28.
The ears are sealed continuously in the longitudinal direction. The upper end sealer 4 and the lower end sealer 4' each have a cutter 6.6'.
are built-in, and when they rotate once and engage with each other, they seal the packaging film 2 in the horizontal direction and cut it to form the packaging body 29.
is obtained and transferred to the next step by the exit conveyor 3o. A drive motor 31 rotates the upper end sealer 4, lower end sealer 4', and film feed rollers 3, 3', and has a rotary encoder 32 between the lower ends 7 and 24'.

A transmission 33 and a fast-forward clutch 34 are provided between the film feed roller 3' and the film feed roller 3'. Further, the phototube 14 and the rotary encoder 32 are each electrically connected to the controller 13.

Note that in the embodiment of the present invention, the rotary encoder 3
2 is the lower second 7-ra axis of the lower end seam 24'.
is placed above.

FIG. 4 is a circuit diagram used in the present invention.

360 ha/L in one rotation from rotary encoder 32
The A-phase 35 that emits /s and the 2-phase 36 that emits one pulse per revolution are sent to the controller 13, but the Z-phase 3
6 is connected to a storage element 39 of the controller 13 via a flip-flop 37 and a logic element 38, and the signal of the A phase 35 is connected to a counter element 40 via a logic element 38'. Furthermore, the signal from the phototube 14 is connected via a flip-flop 37' to a logic element 38' and to a logic element 38. Further, in the controller 13, a counter element 40, a memory element 39, and a counter comparison circuit 41 are provided. The value counted by the counter element 4o is compared to the set value initially set by the memory element 39 in the counter comparator circuit 41, and is transmitted to the fast-forward clutch 34 via the amplifier 42 if the set value is the count value. Then, the fast forwarding clutch 34 is activated. At this time, the film feed roller 3' is rotated and the speed is increased by about 103%, the deviation during operation is corrected, and initial settings are performed.

FIG. 5 shows a sequence chart in the present invention. When the drive motor 31 starts rotating, the rotary encoder 32 rotates, and a reference pulse AP of 360 pulses/rotation is transmitted as the A phase 35, and at the same time, 1 pulse/rotation, that is,
One pulse zP is transmitted as the Z phase 36 in one cycle. Further, when the cut mark 1 is detected by the phototube 14, a pulse CP is transmitted. Pulse ZP transmitted by the Z-phase 36 and pulse CP transmitted by the phototube 14
A reference pulse between a. is the setting pulse P. The setting pulse P is stored in the storage element 39. Controller 1
3 starts counting the reference pulse AP transmitted by the A phase 35 from the pulse ZP transmitted by the Z phase 36, counts the number of pulses up to the pulse CP detected and transmitted by the phototube 14, and counts the pulse a! is% aO≦a! In the case of the condition of
The fast-forward clutch 34 is actuated by an electric signal from the comparison circuit 41, and when ao≧a, the fast-forward clutch 3 is activated.
4 is stopped, and the normal film feed speed is resumed.

Since such a packaging device is electrically configured, maintenance is easy and there is no failure, which improves the operating rate of the packaging device. It is possible to completely eliminate the necessity of adjusting the position of the cut mark 1 and the phototube 14 by inching the cam, or of mechanically aligning the control cam 10 and the cam detection device 12.

Effects of the Invention As described above, the present invention allows initial settings to be easily performed when replacing a packaging film.

It also has great industrial value as it can increase the operating rate of packaging equipment.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view of the packaging device of the present invention, Fig. 2 is a front view of main parts of the packaging film used in the present invention, Fig. 3 is a system diagram of the packaging device of the present invention, and Fig. 4 is a circuit diagram thereof. , Fig. 5 is the same sequence chart, Fig. 6 is the system diagram of the conventional packaging device, Fig. 7 is the same sequence chart, and Fig. 8 is the same sequence chart.
The figure is a schematic front view of a conventional control cam, and FIG. 9 is a side view of the same. 2 is a packaging film, 3.3' is a film feed roller, 4 is an upper end sealer, 4' is a lower end sealer,
13 is a controller, 14 is a phototube, 24 is a material reel, 25 is a bag maker, and 27 is an entrance conveyor. 28 is a vertical cool roller, 31 is a drive motor, 32 is a rotary encoder, 33 is a transmission, and 34 is a fast-forwarding clutch.

Claims (1)

[Claims] The bag making machine is installed from the material reel through the film feed roller, is continuous with the inlet conveyor, and is equipped with a vertical sealing roller.The bag making machine is connected to an upper end sealer and a lower end sealer, and a belt is connected between the lower end sealer and the drive motor. 1. A packaging device comprising: a rotary encoder; a transmission and a fast-feed clutch provided between the drive motor and the film feed roller; and the rotary encoder and phototube electrically connected to each other by a controller.