JPH0364361B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a packaging method for automatically packaging products with a packaging film.

By the way, when it comes to continuous packaging films for packaging products, the film raw materials are usually extruded and molded using an inflation molding machine, and the film is shaped like a tube, which is then taken out from the inflation molding machine and continuously discharged. be done. Therefore, if a tube-shaped continuous packaging film is wound up as it is and the product is packaged using the packaging film, there is no need to perform any processing such as cutting on the packaging film discharged from the inflation molding machine, and there is no need for pre-treatment steps. can be omitted, which is convenient.
On the other hand, Japanese Patent Application Laid-Open No. 52-86887 describes a method for packaging granular materials such as grains. In the method disclosed in the publication, a tubular continuous packaging film is fed in a flat state, and granular materials such as grains are introduced from one side edge of the packaging film. However, in order to package products of a certain size, including grains and other granules, it is necessary to guide and expand a tubular continuous packaging film using a film guide mechanism, and insert the product from the open end of the packaging film. Therefore, a guide mechanism with a complicated structure must be specially provided. Moreover, the guide mechanism can only be used with packaging films of specific sizes. Therefore, to change the size of the packaging film,
It is necessary to change the design of the entire packaging machine.

Therefore, the present invention uses a tubular continuous packaging film, allows products to be sequentially and continuously packaged without requiring a guide mechanism with a complicated configuration, and furthermore, the size of the packaging film can be easily changed. This was the result of repeated various studies and studies in order to make this possible.
Particularly, in the present invention, a tubular continuous packaging film is continuously cut in the length direction along both side edges thereof to be divided into two parts. By this, a pair of sheet-like continuous packaging films with substantially the same width is formed, and these pair of sheet-like continuous packaging films are once separated,
It is guided to both sides of the packaging position by a pair of guide mechanisms, and is supplied to the packaging position from each guide mechanism as it is. Further, the side edges of each continuous packaging film are electrically detected by detection means between each guide mechanism and the packaging position, and when the position of the side edge of the continuous packaging film shifts in the width direction, the detection means The guide mechanism is operated by the side edge detection signal. This corrects the misalignment of the side edges,
The present invention is characterized in that the continuous packaging films are faced to each other at the packaging position, side-sealed along both side edges, and top-sealed and bottom-sealed along the edges.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, a tubular continuous packaging film 1 is guided from a take-up roll 2 to a cutter 3, and the cutter 3 cuts the tubular continuous packaging film 1 in the length direction along both side edges 4, and cuts the tubular continuous packaging film 1 into two parts. do. As a result, a pair of sheet-like continuous packaging films 5a and 5b having substantially the same width are formed. A pair of sheet-like continuous packaging films 5a and 5b are guided by a guide roller 6 in an overlapping state, and then separated once and guided to both sides of a packaging position 8 by a pair of guide mechanisms 7a and 7b. .

Each guide mechanism 7a, 7b has a guide roller 9
Inclined rod 1 arranged at a 45° inclination with respect to a and 9b
0a, 10b and guide rollers 11a, 11b arranged at right angles to guide rollers 9a, 9b. Each continuous packaging film 5a, 5b is moved from a guide roller 9a, 9b to an inclined rod 10a, 10, respectively.
b, and as shown in FIG. 3, is bent by 45 degrees by inclined rods 10a, 10b, and guided to guide rollers 11a, 11b. Furthermore, each continuous packaging film 5a, 5b passes through a pair of detection means 12a, 12b, and is supplied to a packaging position 8 from a pair of guide rollers 13a, 13b.

Each detection means 12a, 12b electrically detects the side edge 14 of each continuous packaging film 5a, 5b between each guide mechanism 7a, 7b and the wrapping position 8, respectively. Each guide mechanism 7a, 7b has its inclined rod 1
0a, 10b in the vertical direction in FIG. 12a, 12b
This operating mechanism is driven by the side edge detection signal, and the tilting rods 10a, 10b move in translation in the vertical direction in FIG. Therefore, the inclined bar 10
Continuous packaging film 5a, 5b for a, 10b
The continuous packaging film 5a, 5b, which is guided from the inclined rods 10a, 10b to the guide rollers 11a, 11b, moves along its length along the inclined rods 10a, 10b. deviates in the width direction according to This corrects the misalignment of the side edges 14 of the continuous packaging films 5a, 5b.

In this embodiment, the film bags 15 are sequentially and continuously wrapped at the packaging position 8. As shown in FIG. 4, each continuous packaging film 5a, 5
b face each other, are side sealed along both side edges 14 by the side seal bars 17 of the sealing device 16, and are side sealed along the edge 19 by the cross seal bar 18.
The bottom is sealed along the Film bag making 15
are stacked together to form a continuous packaging film 5a,
5b is side-sealed and bottom-sealed, the packaging film 5a, 5b is pushed down by the spatula 20, and the packaging film 5a, 5b is pressed down from between the guide rollers 13a, 13b.
pushed inside. The continuous wrapping film 5 is then clamped by a suitable clamping mechanism (not shown).
a, 5b and the film bag 15 are clamped, the spatula 20 rises, and the packaging film 5a, 5
b and is extracted from the film bag 15. The clamping mechanism pulls down the packaging films 5a, 5b and the film bag 15 and pulls them out from the packaging position 8. As a result, new continuous wrapping films 5a, 5b are supplied to the wrapping position 8 from the guide rollers 13a, 13b. Then, the process described above is repeated, and the continuous packaging film 5 at the packaging position 8 is
a, 5b are side sealed and bottom sealed. At the same time, the packaging films 5a and 5b pulled out from the packaging position 8 are top-sealed along the edges by the cross seal bar 18 of the sealing device 16 and melted, and the film bag 15 is attached to the packaging films 5a and 5b. This completes the coating and completes the packaging.

This packaging method is similar to the conventional method because the tube-shaped continuous packaging film 1 is continuously cut in the length direction along both side edges 4 and divided into two parts to form a pair of sheet-shaped continuous packaging films 5a and 5b. There is no need to insert a product, such as a film bag 15, into the tubular continuous packaging film 1, and there is no need to expand the tubular continuous packaging film 1. A pair of sheet-like continuous packaging films 5a, 5b are once separated and guided to both sides of the packaging position 8 by a pair of guide mechanisms 7a, 7b.
Since the product is supplied to the packaging position 8 from b, the product can be easily inserted into the packaging films 5a and 5b of the packaging position 8 from the upper side of the packaging position 8, that is, from the packaging film supply side. Therefore, there is no need to provide a complicated guide mechanism. Moreover, since each continuous packaging film 5a, 5b is side-sealed along both side edges 14, and top-sealed and bottom-sealed along the edge 19, the packaging film 5a, 5b
The product can be completely covered and packaged completely. Packaging film 5a, 5
To change the size of b, the positions of the cutter 3 and the side seal bar 17 of the sealing device 16 may be adjusted to match the size. There is no need to change the design of the entire packaging machine. Furthermore, the side edges 14 of each continuous packaging film 5a, 5b are electrically detected between each guide mechanism 7a, 7b and the packaging position 8 by detection means 12a, 12b, respectively;
When the position of the side edge 14 of the continuous packaging film 5a, 5b shifts in the width direction, the detection means 12a, 12
Guide mechanisms 7a and 7b are activated by the side edge detection signal of b.
Since this operation is performed, the positional deviation of the side edge 14 can be automatically corrected. Therefore, the continuous packaging films 5a and 5b can be accurately opposed to each other at the packaging position 8, and side seals can be accurately performed along both side edges 14.

As explained above, according to the present invention, the tubular continuous packaging film 1 is continuously cut in the length direction along both side edges thereof and divided into two parts, thereby forming a pair of substantially the same width. Sheet-like continuous packaging films 5a and 5b are formed. Then, the pair of sheet-like continuous packaging films 5a, 5b are once separated, guided to both sides of the packaging position 8 by a pair of guide mechanisms 7a, 7b, and supplied to the packaging position 8 as they are. Furthermore, the detection means 12a, 12
b and guide mechanisms 7a, 7b correct the misalignment of the side edges of the packaging films 5a, 5b,
At the packaging position 8, each continuous packaging film 5a,
5b are opposed to each other, and each continuous packaging film 5a,
5b are side-sealed, top-sealed and bottom-sealed to each other, and each continuous packaging film 5a, 5
The product 15 is packaged by b. As a result, even if the product 15 is of a certain size, such as a film bag 15, the tubular continuous packaging film 1 can be used as is, and the packaging film 1 can be used to create the product 15.
can be packaged. Moreover, there is no need to specially provide a complicated guide mechanism as in the prior art, and the size of the packaging film 1 can be easily changed.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a front view of Fig. 1, Fig. 3 is a side view of Fig. 2, and Fig. 4 is a perspective view showing the packaging position of Fig. 1. It is a diagram. DESCRIPTION OF SYMBOLS 1...Tube-shaped continuous packaging film, 3...Cut, 4...Both sides edges of tubular continuous packaging film, 5a, 5b...Sheet-shaped continuous packaging film,
7a, 7b...Guide mechanism, 8...Packaging position, 1
2a, 12b...detection means, 14...side edge of each continuous packaging film, 15...film bag making.

Claims (1)

[Claims] 1. A tube-shaped continuous packaging film is continuously cut in the length direction along both side edges thereof, and divided into two parts, thereby forming a pair of sheet-shaped continuous packaging films of substantially the same width. The sheet-like continuous packaging film is once separated, guided to both sides of the packaging position by a pair of guide mechanisms, and fed as it is from each guide mechanism to the packaging position, and further,
The side edges of each continuous packaging film are electrically detected by detection means between each guide mechanism and the packaging position, and when the position of the side edge of the continuous packaging film shifts in the width direction, the detection means The guide mechanism is actuated in response to the side edge detection signal, thereby correcting the positional deviation of the side edges, causing each continuous packaging film to face each other at the wrapping position, and moving the side edges along both sides of the film. A packaging method characterized in that the product is sealed, top-sealed and bottom-sealed along the edges, and the product is automatically wrapped with a packaging film.