JP2003327271A - Shrink-wrapped body and shrink-wrapping device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shrink-wrapped body and a shrink-wrapping device, which have special structures, to make it possible to open a sealed plastic film 1 accurately and take out an article easily when tearing open the plastic film 1 along a perforation 4. <P>SOLUTION: The plastic film is fed in a constant direction X and is wrapped around the article, which is then shrink-wrapped with the plastic film. The perforation is formed on the plastic film to be extended in a direction crossing the feed direction of the plastic film. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shrink package in which articles are shrink-wrapped with a plastic film and a packaging device for the shrink package.

[0002]

2. Description of the Related Art As shown in FIG. 9, when an article 2 is shrink-wrapped by a plastic film 1, the plastic film 1 is normally supplied in a certain direction X and wrapped around the article 1. afterwards,
For example, the plastic film 1 is heat-sealed by the heat-sealing bar, the heat-sealing line 3 is formed on the plastic film 1, and thereby the article 2 is sleeve-wrapped. After that, the plastic film 1 is heat-shrinked in the shrink tunnel. As a result, the article 2 is shrink-wrapped.

Further, perforations 4 may be formed on the plastic film 1. The perforations 4 extend parallel to the feeding direction X of the plastic film 1. Two rows of perforations 4 may be formed at intervals. Therefore, the plastic film 1 can be torn along the perforations 4 and opened.

However, for example, for an elongated article 2, that article 2 is usually the plastic film 1.
Are arranged at right angles to the supply direction X of. Further, the plastic film 1 is wrapped around the article 2, and the article 2 is shrink-wrapped by the plastic film 1. In this case, even if the plastic film 1 is torn along the perforations 4, the direction is the width direction or the height direction of the article 2 and is different from the length direction of the article 2. Therefore, there is a problem that the plastic film 1 cannot be opened accurately and the article 2 cannot be easily taken out.

When shrink-wrapping a plurality of articles, the articles are usually arranged at right angles to the feeding direction X of the plastic film 1, and the plastic film 1 shrink-wraps the articles. Therefore, even if the plastic film 1 is torn along the perforations 4, the direction thereof is different from the arrangement direction of the articles, and the plastic film 1 cannot be opened properly.

[0006]

SUMMARY OF THE INVENTION Therefore, the present invention newly provides a shrink wrapping body having a special structure and a wrapping apparatus for the shrink wrapping body,
When the plastic film is torn along the perforations, the plastic film is opened properly so that the article can be easily taken out.

[0007]

According to the shrink wrap of the present invention, a plastic film is supplied in a fixed direction and wound around an article, and the article is shrink-wrapped by the plastic film. Further, perforations are formed on the plastic film. The perforations extend in the direction crossing the direction of feeding the plastic film.

A notch is preferably formed in the plastic film and the notch preferably extends across the perforations.

Further, it is preferable that the two rows of perforations are spaced from each other.

Further, in the shrink wrapping device of the present invention, the plastic film is supplied in a fixed direction and wound around the article, and the article is shrink-wrapped by the plastic film. Further, the perforation blade faces the plastic film at a position upstream of the position where the plastic film is wrapped around the article.
The perforation blade extends in the direction crossing the supply direction of the plastic film. Further, each time the plastic film is wound around the article, the drive mechanism acts on the perforation blade, the perforation blade is pressed against the plastic film, and the perforation is formed on the plastic film.

[0011]

Description of Embodiments Embodiments of the present invention will be described below.

FIG. 1 shows the shrink wrap of the present invention. This package is composed of a plastic film 1 and an article 2, and the plastic film 1 is supplied in a fixed direction X and is wrapped around the article 2 as in the case of FIG. 9. Further, the plastic film 1 is heat-sealed by the heat-sealing bar, the heat-sealing wire 3 is formed on the plastic film 1, the article 2 is sleeve-wrapped by the heat-sealing bar, and the plastic film 1 is heat-shrinked by the shrink tunnel. The fact that the article 2 is shrink-wrapped is similar to that shown in FIG. The elongated article 2 is arranged at right angles to the feeding direction X of the plastic film 1, and it is shrink-wrapped by the plastic film 1, which is similar to that in FIG. 9.

Further, in this package, perforations 4 are formed on the plastic film 1. The perforations 4 extend in a direction crossing the supply direction X of the plastic film 1. In this embodiment, the perforations 4 extend at right angles to the feeding direction X of the plastic film 1. Therefore,
The direction is the same as the length direction of the article 2, and in the same direction as the length direction of the article 2, perforations 4 are formed between both end surfaces of the article 2.

Further, in this embodiment, two rows of perforations 4 are formed at intervals. Furthermore, the notch 5 is formed in the plastic film 1. The notch 5 extends across the perforation 4.

Therefore, in the case of this package, the plastic film 1 can be pulled from the notch 5 and torn along the perforations 4. Moreover, when tearing along the perforations 4, the direction is the same as the length direction of the article 2, and the plastic film 1 is
Is torn in the same direction as the length direction of. Therefore,
The plastic film 1 can be opened exactly,
The article 2 can be easily taken out.

FIG. 2 shows another embodiment. In this embodiment, a plurality of articles 2 are arranged at right angles to the feeding direction X of the plastic film 1, and the articles 2 are shrink-wrapped by the plastic film 1. Further, two rows of perforations 4 are formed at intervals. The perforations 4 extend at right angles to the feeding direction X of the plastic film 1. Therefore, the direction is the same as the arrangement direction of the articles 2. Furthermore, the notch 5 is formed in the plastic film 1, and the notch 5 extends across the perforations 4.

Therefore, when the plastic film 1 is pulled from the notch 5 and torn along the perforations 4, the direction is the same as the arrangement direction of the articles 2,
The plastic film 1 is torn in the same direction as the arrangement direction of the articles 2. Therefore, the plastic film 1 can be accurately opened and the article 2 can be easily taken out.

FIG. 3 shows a packaging device for the package of FIG. 1 or 2. In this device, the plastic film 1 is pulled out from the supply roll 6 and guided to the winding roll 7. Further, the article 2 is fed by the conveyor 8, and the cylinder 9 acts on the pusher 10 so that the article 2 is pushed out by the pusher 10 as shown in FIG. 4, so that the article 2 advances across the plastic film 1 and the conveyor 11 To be delivered to. Therefore, the plastic film 1 is pulled by the article 2, the plastic film 1 is supplied in the constant direction X, and is wrapped around the article 2.

Next, as shown in FIG. 5, the plastic film 1 is sandwiched and restrained by the brake 12 between the article 2 and the supply roll 6, and the plastic film 1 is held by the brake 13 between the article 2 and the winding roll 7. Is caught and restrained. Further, the heat seal bar 14 faces the pedestal 15, the cylinder 16 acts on the pedestal 15, the pedestal 15 descends along the end surface of the article 2, and the pedestal 15 pushes down the plastic film 1. . Further, thereafter, the cylinder 17 acts on the heat seal bar 14, the heat seal bar 14 rises toward the pedestal 15, the plastic film 1 is sandwiched between the heat seal bar 14 and the pedestal 15, and the heat seal bar 14 Thus, the plastic film 1 is heat-sealed and melted. Therefore, the heat seal wire 3 is formed on the plastic film 1, and the article 2 is sleeve-wrapped by the heat seal wire 3.

Then, the plastic film 1 and the article 2 are sent by the conveyor 11, and the plastic film 1 is heat-shrinked in the shrink tunnel. Therefore, the article 2 is shrink-wrapped by the plastic film 1.

In this apparatus, the perforation blade 18 faces the plastic film 1 at a position upstream of the position where the plastic film 1 is wound around the article 2. The perforation blade 18 extends in a direction crossing the supply direction X of the plastic film 1. In this embodiment, the perforation blade 1
8 extends at right angles to the feeding direction X of the plastic film 1.

Further, in this embodiment, two perforation blades 18 are arranged at intervals in the feeding direction X of the plastic film 1, and as shown in FIGS. 6, 7 and 8, perforations are provided. The blade 18 is fixed to the base plate 19. Further, a cutting blade 20 is arranged between the perforation blades 18, faces the plastic film 1, and is fixed to the base plate 19. The cutting blade 20 extends across the perforation blade 18.

Each time the plastic film 1 is fed in the feeding direction X and wound around the article 2, the drive mechanism acts on the perforation blade 18 and the cutting blade 20, and the perforation blade 18 and the cutting blade 20 are made of plastic. Pressed against film 1, plastic film 1
A perforation 4 and a notch 5 are formed at. In this embodiment, a cylinder 21 is used for the drive mechanism, which is connected to the base plate 19. Further, on the side opposite to the perforation blade 18 and the cutting blade 20, the receiving member 22 faces the plastic film 1, and when the plastic film 1 is heat-sealed by the heat seal bar 14, the cylinder 21 is moved to the base plate 19, The base plate 19, the perforation blade 18 and the cutting blade 20 act on the perforation blade 18 and the cutting blade 20 so that the plastic film 1 and the receiving member 22.
Move towards.

Further, in this embodiment, the two cover plates 23 are connected to the connecting plate 24, the spring 25 acts on the connecting plate 24, and the connecting plate 24 is pressed against the base plate 19. It is arranged on both sides of the base plate 19 and goes beyond the perforation blade 18 and the cutting blade 20, and receives the receiving member 22.
Grow towards. Therefore, when the perforation blade 18 and the cutting blade 20 move toward the plastic film 1 and the receiving member 22, the cover plate 23 moves integrally with the base plate 19, and first, the plastic film 1 moves to the cover plate 23 and the receiving member. It is sandwiched and held between 22, and the cover plate 23 stops at that position. Then, the base plate 19 separates from the connecting plate 24 and moves toward the plastic film 1 and the receiving member 22. Therefore, the perforation blade 18
And the cutting blade 20 is pressed against the plastic film 1 to form perforations 4 and cuts 5 in the plastic film 1.

Thereafter, the base plate 19 moves in the opposite direction, the perforations 18 and the cutting blades 20 separate from the plastic film 1, and the cover plate 23 also separates from the plastic film 1. After that, the plastic film 1 is supplied again and wrapped around the article 2. Then, every time the plastic film 2 is wound around the article 2, the same steps are sequentially and alternately repeated to form perforations 4 and cuts 5 in the plastic film 1.

Therefore, after that, the heat seal bar 1
When the plastic film 1 is heat-sealed by 4 and heat-shrinked by the shrink tunnel, the perforations 4 and the notches 5 are formed in the plastic film 1 in the packaging body of FIG. 1 or FIG. Extends at right angles to the feeding direction X of the plastic film 1.

Regarding the positions of the perforation blade 18, the cutting blade 20 and the receiving member 22 in FIG. 3, the perforation blade 18, the cutting blade 20 and the receiving member 22 are moved by an appropriate mechanism in the feeding direction X of the plastic film 1. And its position can be adjusted. Therefore,
In the package of FIG. 1 or 2, the positions of the perforations 4 and the notches 5 can be adjusted arbitrarily.

In the above embodiment, the perforation 4 extends at right angles to the feeding direction X of the plastic film 1, but it is not always necessary. The perforations 4 may not extend at right angles to the supply direction X of the plastic film 1 but may extend in a direction inclined to some extent. In short, if the perforations 4 extend in the direction crossing the supply direction X of the plastic film 1, the plastic film 1 is torn along the perforations 4,
It can be easily opened. Therefore,
The perforation blade 18 is also the feeding direction X of the plastic film 1.
It should extend in the direction of crossing.

Further, in the above embodiment, the article 2 is sleeve-wrapped by the plastic film 1, but it is not always necessary. The article 2 may be three-sided sealed by the plastic film 1 or may be four-sided sealed.

[0030]

As described above, according to the present invention, when the plastic film is torn along the perforations, the plastic film can be accurately opened and the article can be easily taken out. Can be achieved.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing another embodiment.

FIG. 3 is a side view showing a packaging device for the packaging body of FIG. 1 or FIG.

FIG. 4 is a side view showing the next step of the apparatus of FIG.

FIG. 5 is a side view showing the next step of the apparatus of FIG.

6 is a cross-sectional view of the perforation blade and the cutting blade of FIG.

FIG. 7 is a front view of the perforation blade and the cutting blade of FIG.

FIG. 8 is a side view of the perforation blade and the cutting blade of FIG.

FIG. 9 is a perspective view of a conventional package.

[Explanation of symbols]

1 plastic film 2 articles 4 perforations 5 notches 18 perforated blade 20 cutting blade 21 cylinders

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Claims (4)

[Claims] 1. A shrink package in which a plastic film is supplied in a certain direction and is wrapped around an article, and the article is shrink-wrapped by the plastic film, wherein perforations are formed in the plastic film. The shrink wrapping body is characterized in that the perforations extend in a direction crossing the supply direction of the plastic film. 2. The shrink wrap according to claim 1, wherein a notch is formed in the plastic film, and the notch extends across the perforations. 3. The shrink wrapping body according to claim 1, wherein the two rows of perforations are formed at intervals. 4. A shrink wrapping device for supplying a plastic film in a constant direction, winding the plastic film around the product, and shrink-wrapping the product with the plastic film, the device being spread in a direction crossing the supply direction of the plastic film. , At a position upstream of the position where the plastic film is wrapped around the article, a perforation blade facing the plastic film, and each time the plastic film is wrapped around the article, the perforation blade is pressed against the plastic film, A shrink packaging device, comprising: a drive mechanism for forming perforations on the plastic film.