JPS63203530A - Opening section forming device for heat-shrinkable packaging film - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for organizing cartons and bottles containing powdered detergents, foods, chemicals, and other contents in order to simplify the handling at the distribution stage. The present invention relates to an apparatus for forming an opening in a heat-shrinkable packaging film in a package whose entire outer periphery is wrapped with a heat-shrinkable packaging film for packaging.

[Conventional technology]

BACKGROUND ART Conventionally, shrink packaging has been widely used for articles such as cartons and bottles, in which the entire outer periphery of the article is covered with a heat-shrinkable packaging film such as polyethylene to ensure protection of the article and ease of handling.

Recently, shrink-wrapping of multiple products in bulk has become popular, and products are now being placed in shrink-wrapped form on the shelves of general retail stores such as supermarkets. Particularly in supermarkets, where each item is sold with a price tag attached to it, conventionally it was necessary to tear the shrink-wrapped film and attach the label.

With this, the products would fall apart on the display shelf, and would be vulnerable to stiffness, so even when they are displayed on the display shelf, they are displayed in bulk shrink-wrapped, and labels can be attached each time, minimizing the risk of stiffness. It is requested that the company be able to deal with the situation as much as possible. For this reason, attempts have been made to form opening cuts in the heat-shrinkable packaging film, but packaging using this type of heat-shrinkable packaging film does not require the heat-shrinkable packaging film to adhere tightly to the product. Therefore, making cuts to remove the packaging film after heat shrinking is undesirable because it tends to damage the packaged items, and making cuts in the film before covering the items will cause the cuts to occur due to heat shrinkage. There is an inconvenience that the position of the insertion part shifts and is inconsistent.

[Problem that the invention seeks to solve]

For this reason, as shown in Japanese Patent Application Laid-Open No. 61-1-328, conventional techniques have been used to cut the heat-shrinkable packaging film by pressing an aperture blade with a sharp tip onto the heat-shrinkable packaging film. It is applied to areas where there is no opening, especially where there is a gap between the film and the surface of the product, or where the product is made of soft material. Since it is in close contact with the flat surface of the article and there are no gaps, it cannot be applied because it is a hard material, and as a result, when the opening blade is pressed, it damages the surface of the article, which significantly reduces the commercial value, which is a problem.

The present invention aims to accurately eliminate these conventional drawbacks, and allows the formation of openings in heat-shrinkable packaging films without being subject to positional restrictions or restrictions on the material of the product. The object of the present invention is to provide an apparatus that can efficiently cut a hole and form an opening easily and efficiently.

[Means for solving problems]

The present invention provides an incision cut-forming member provided for forming cuts on the surface of the shrunken film for a package in which a heat-shrinkable packaging film is wrapped around an article, heat-shrinked, and brought into close contact with the article. and a lifting and holding member for separating the shrunken film from the article and forming a gap along the cutting score forming member, which can be attached and separated, forming an opening in a heat-shrinkable packaging film. It is a device.

(Example) An example of the present invention will be described with reference to FIGS. 1 to 5. A package in which a plurality of articles A are wrapped in a heat-shrinkable packaging film B and heat-shrinked to adhere tightly to the article A. A cutter 1 of an incision cut forming member provided for forming a cut 5 on the surface of the shrunk film B with respect to the body C, and a gap formed by separating the shrunken film B from the article A along with the cutter 1. Vacuum duct 3 of the lifting and holding member for forming
This is an apparatus for forming openings in a heat-shrinkable packaging film, which is configured to be capable of coming into contact with and separating from the heat-shrinkable packaging film.

In the illustrated incision, the cutter 1 heated by a heater 2 serving as a heat generating part is formed into an open shape and is movable up and down, and is formed by the lifting and holding member. The bottom dead center of the movement is within the gap 6.

In particular, the opening shape includes a U-shaped cutter part created by a perforation, and a cutter part for forming an opening cut that cuts in a direction perpendicular to the U-shaped cut, near both ends of the U-shaped cut. However, X-shape, 2-shape, 1-shape, H-shape, U-shape
It is sufficient to use a cutter having a shape that is easy to open, such as a letter shape, and the lifting mechanism 7 for the cutter 1 is provided so as to be able to move toward and away from the film B by a motor or other driving source via a cylinder or a transmission mechanism.

Further, if necessary, the cutter 1 may be fixedly provided and the film B may be pressed by the cutter.

The lifting and holding member is a baraculum duct 3 that adsorbs the heat-shrinkable packaging film B to form a gap 6 between it and the lifted article A. It is equipped with a moving mechanism 8 so as to move opposite to the direction in which the cutter 1 moves towards and away from the cutter 1, and is arranged along the cut 5 and is connected to a vacuum pump 9 for suction by a piping 10. .

The varaculum duct 3 has a plurality of suction nozzles 4 facing each other on both sides of the cut 5 formed by the cutter 1 of the incision forming member. Although the cuts 5 are arranged so as to face the surface of the film, depending on the shape of the cuts 5, they may be provided on one side or both sides as desired. In any case, since the movement of the cutter 1 and the baraculum duct 3 is relative, it is best to lift the film and use the raised part that forms the gap 6 to form the cut 5 through pressure contact with the cutter 1. good.

In this case, the cutter 1 is selected so that the film can be cut by heating with the heater 2. Further, instead of the varaculum duct 3, a suction cup structure may be used as the lifting and holding member, and the suction or suction release may be performed by stopping the suction of a vacuum pump or by known means. Furthermore, although the moving direction of the cutter 1 and the varaculum duct 3 is a vertical device in the vertical direction, the present invention is not limited thereto, and a horizontal device that moves in the horizontal direction can also be used. In this case, an indicating mechanism for the package may be added.

1) in the figure is a power source for a heater such as electric heating.

As shown in Fig. 5, the article A is wrapped in a sleeve with one upper and lower heat-shrinkable packaging film B (Fig. 5 (1)).
When the article is passed through a shrinkage tunnel heated by a heater or the like, it becomes a finished package C in which the entire outer periphery of the article is wrapped (Fig. 5+21).

After that, perforations 5 are made on the surface of the film B at necessary locations on the top, bottom, or side surfaces of the vaginal package C using the cutter L and the baraculum duct 3 (Fig. 5 + 31), and when a price tag or label is attached. This can be done by manually tearing the film B from the cut 5 as shown in FIG. 5(4). That is, as shown in FIG. 2, preparation is completed when the baraculum duct 3 and the cutter 1 are brought into contact with the film B of the package C (FIG. 2 (1)). In this case, the package C is It is preferable that the conveyor be located under the aperture forming device while the conveyor is stopped or moving during the conveyance process.

Then, when the varaculum duct 3 is lowered to come into contact with the film and the vacuum pump 9 is activated (FIG. 2 (2)), the film B is brought into close contact with the suction nozzle 4. When the varaculum duct 3 is raised, the article A is brought into contact with the film B. The film B separates and forms a gap 6 (Fig. 2+31>).

Next, the cutter 1 heated by the heater 2 is lowered and press-fitted into the raised film B to form the cut 5 (
Figure 2 (4)). After that, raise the power lid 1 (Fig. 2 +
51), when the vacuum pump 9 is stopped and the suction is stopped, the suction nozzle 4 is removed and the film B is restored to its original state, and the film B is brought into close contact with the article A, completing the opening forming operation (Fig. 2 (6) )) Therefore, an opening for opening is effectively formed in the package C in which the surface of the article A and the film B are in close contact with each other.

In this embodiment, the U-shaped edge of cut 5 may be connected to another cut so that it can be completely separated.
By leaving one side as shown in the figure, it is possible to put this part of the film in its original position after pasting the label (it is also possible to stick the films together using adhesive tape). Even after a price tag is pasted, the product can be displayed without the product being packaged in pieces, and it is possible to minimize damage to the product until it reaches the shrine.

In the example shown in FIG. 6, a tray 12 made of corrugated cardboard is attached to the package C, and the tray 1 is capable of accommodating a plurality of articles A such as cartons and bottles.
Put article A into 2 and put polyethylene (80μ) on top.
Alternatively, it can be used as a package that is shrink-packed with a film B such as cross-linked polyethylene (40 to 50 μm) and packed together. The film B used for this film packaging is designed to shrink in the length direction, so if the film is wrapped in a direction perpendicular to the connection piece of the tray, it becomes a bag that takes into account the direction of shrinkage of the film and is integrated with the tray. It can be packaged in a variety of ways. In this case as well, the cut 5 of the opening may be formed in the same manner as described above.

〔Effect of the invention〕

The present invention provides an incision score forming member for forming cuts on the surface of a shrunk film, and a holding member for separating the shrunken film from an article along with the incision score forming member to form a gap. By making the upper holding member detachable, the opening for opening can be efficiently formed without damaging the packaged product, making it possible to create a package that is ideal for sales with price tags. In addition to being able to manufacture packaging that is easy to handle and can be easily torn open from shrink film packaging materials, work efficiency can be greatly improved, and the packaging is highly safe and reliable. It is something that can be done.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the system, Figures 2 (1) to (6) are longitudinal sectional views showing the operating state, Figure 3 is a slope view of the package, and Figure 4 is an enlarged view taken along the line 1-1 in Figure 1. Plan view, Figure 5 (1) to (4)
) is a perspective view showing how the packaging is used, and FIG. 6 is a perspective view of tray shrink packaging in another embodiment. A... Packaging article, B... Heat-shrinkable packaging film, C
...Packaging body, 1...Cutter, 2...Heater, 3.
... Puffculum duct, 4... Nozzle, 5... Cut, 9... Vacuum pump.

Claims (7)

[Claims] (1) An incision cut-forming member provided for forming a cut on the surface of the shrunken film for a package in which a heat-shrinkable packaging film is wrapped around an article, heat-shrinked, and brought into close contact with the product. and a lifting and holding member for separating the shrunken film from the article and forming a gap along the cutting score forming member, which can be attached and separated, forming an opening in a heat-shrinkable packaging film. Device. (2) A patent claim in which the incision score forming member is a cutter heated by a heater, is provided to be movable up and down, and has its bottom dead center within the gap formed by the lifting and holding member. The opening forming device according to item 1. (3) The incision-slit forming member includes a U-shaped cutter portion and a cutter portion for forming an opening cut that cuts in a direction perpendicular to the U-shaped cut near both ends of the U-shaped cut. An opening forming device according to claim 1. (4) The lifting and holding member is configured to move opposite to the direction of movement toward and away from the incision forming member, and is arranged along the cut.
The opening forming device according to any one of items 1 to 3. (5) Any one of claims 1 to 4, wherein the lifting and holding member is a vacuum duct which adsorbs the shrink wrapping film to form a gap between it and the lifted article. The opening forming device according to one of the above items. (6) The lifting member has a plurality of lifting members facing each other on both sides of the cut formed by the cutting cut forming member, and has a suction nozzle facing the surface of the film. An opening forming device according to any one of claims 1 to 5. (7) Claims 1 to 6, wherein the lifting and holding member is arranged along an incision incision forming member that is movable toward and away from the lifting and holding member in a direction in which it moves up and down.
The opening forming device according to any one of the following paragraphs.