JP3245404U - packaging material - Google Patents

Abstract

[Problem] To provide a structure of a packaging material that can immediately wrap around an article to be packaged when the article is supplied to the packaging material, and which wraps around the article when the article is supplied to the packaging material on a conveyor. To provide a structure of a packaging material in which a wrapping piece of the packaging material can automatically and surely wrap around an article to be packaged under its own weight, and dramatically improve mechanization and unmanned operation of this type of packaging process. The present invention is made of a soft base sheet 11 mainly made of synthetic resin foam, and the substantially central bottom of the base sheet is formed as a circular convex portion 12 that lifts upward, and is wrapped around the outer periphery of the circular convex portion. Wrapping pieces 13 that wrap the article are integrally extended radially, and when the article to be packaged is accommodated in the lifting convex portion, the circular convex portion is lowered, and the wrapping piece is lifted upward and wraps around the article to be packaged. In the wrapping material 10, a groove-shaped annular inverted base portion 20 was formed by crushing the base sheet between the circular convex portion and the wrapping piece. [Selection diagram] Figure 1

Description

This invention relates to a packaging material, and particularly to a soft packaging material that can wrap an object in a soft manner with a single touch.

In order to protect the packaged items from impact and surface damage, various packaging materials are used to individually and softly wrap the packaged items. For example, when packaging melons, a mesh packaging material made of soft synthetic resin foam is used. This mesh packaging material is manufactured continuously by special extrusion molding, and then cut into appropriate lengths and melons are pressed inside for use.

However, such mesh-like packaging materials require large-scale equipment for manufacture by manufacturers, which increases costs. Moreover, the user who uses this is required to manually open the opening of the packaging material and push the article into a predetermined position, which is a complicated task. Furthermore, even though this mesh packaging material is folded for storage and transportation, it is quite bulky, which is disadvantageous in terms of storage and transportation.

In view of these points, the applicant first proposed a method of manufacturing a flexible base sheet mainly made of synthetic resin foam, in which a substantially central portion of the base sheet is formed as a circular convex portion that can be freely reversed. proposed a packaging material characterized in that a wrapping piece is integrally extended radially from the circular convex portion to be lifted upward by the inversion of the circular convex portion and wrap around the article (Japanese Patent No. 2,634,992). This packaging material has great advantages in that it is simple and easy to manufacture, allows users to easily package articles by greatly reducing complicated operations, and is also economical.

Patent No. 2634992

However, in recent years, packaging technology has improved dramatically and the packaging process has become more mechanized and unmanned, and the structure of the packaging material has become such that it can wrap around the article as soon as the article is supplied to the packaging material. has become desired. More specifically, for example, when a packaged article is placed on a packaging material on a conveyor, the wrapping piece of the packaging material can automatically and reliably wrap around the packaged article under its own weight. The purpose of this invention is to dramatically improve the mechanization and automation of this type of packaging process.

That is, the invention according to claim 1 is made of a soft base sheet mainly made of synthetic resin foam, and the substantially central bottom of the base sheet is formed as a circular convex portion that lifts upward, and the outer periphery of the circular convex portion A wrapping piece that wraps the packaged article is integrally extended radially, and when the packaged article is accommodated in the lifting convex part, the circular convex part descends and the wrapping piece is lifted upward, and the packaged article is lifted up. The present invention relates to a packaging material that wraps around the surroundings, characterized in that a groove-shaped annular inverted base is formed by crushing the base sheet between the circular convex portion and the wrapping piece.

A second aspect of the present invention relates to the packaging material according to the first aspect, wherein the annular inverted base portion becomes a grounding portion after the wrapping piece is inverted.

The invention according to claim 3 is the packaging according to claim 1, wherein the thickness of the base sheet is 2.5 to 5.5 mm, and the thickness of the annular inverted base formed by the crushing is 0.5 to 1.5 mm. Related to materials.

Furthermore, the invention of claim 4 relates to the packaging material according to claim 1, wherein the groove width of the annular inverted base is 2.5 to 5.5 mm.

According to the packaging material of the invention of claim 1, the packaging material is made of a soft base sheet mainly made of synthetic resin foam, and the substantially central bottom of the base sheet is formed as a circular convex portion that lifts upward, and the circular convex portion Wrapping pieces for wrapping the packaged article are integrally extended radially around the outer periphery of the holder, and when the packaged article is accommodated in the lifting convex part, the circular convex part descends, and the wrapping piece is lifted upward to lift the packaged article. In the packaging material that wraps around the article, a groove-shaped annular inverted base is formed between the circular convex portion and the wrapping piece by crushing the base sheet, so that it is easier to accommodate the article to be packaged. When the circular convex portion descends, the load force is effectively transmitted as a reversing force to the wrapping piece on the outer periphery via the annular reversing base, so that the article to be packaged can be reliably and efficiently wrapped. .

According to the packaging material of the invention of claim 2, in the packaging material of claim 1, the annular inversion base becomes a grounding part after inversion of the wrapping piece, so that the annular inversion base part becomes a ground contact part after inversion of the wrapping piece. It is possible to form a buffer part and stabilize the packaging posture.

Furthermore, according to the packaging material of the invention of claim 3, in the packaging material of claim 1, the thickness of the base sheet is 2.5 to 5.5 mm, and the thickness of the annular inverted base by the crushing is is 0.5 to 1.5 mm, it is possible to form a simple, economically effective, and reliable annular inversion base.

Furthermore, according to the packaging material of the invention of claim 4, in the packaging material of claim 1, since the groove width of the annular inverted base is 2.5 to 5.5 mm, the properties of the packaged object can be improved. An appropriate annular inversion base can be effectively and reliably formed depending on the situation.

FIG. 1 is a schematic plan view showing a packaging material according to an embodiment of the present invention. FIG. 2 is a sectional view of a main part around the center bottom of the packaging material of FIG. 1; FIG. 3 is a schematic cross-sectional view showing the function of the packaging material of the present invention. FIG. 3 is an enlarged cross-sectional view illustrating an outline of the operation of the annular inverted base of the packaging material. It is a perspective view of the principal part of the lower surface side similarly showing the packaged state of the packaging material.

As shown in the figure, the packaging material 10 shown in FIG. Wrapping pieces 13, 13, 13 are formed and integrally extend radially around the outer periphery of the circular convex portion to wrap the packaged article A (FIG. 3). In this structure, the circular convex portion 12 descends and the wrapping piece 13 is lifted upward to wrap around the article A, in which there is a gap between the circular convex portion 12 and the wrapping piece 13 The groove-shaped annular inverted base portion 20 is formed by crushing the base sheet 11.

As the soft base sheet 11 used in the packaging device 10 of this invention, a flexible sheet material is used that can softly wrap the surface of the article to be packaged, such as fruit, without damaging it. For example, a sheet material mainly composed of a synthetic resin foam made of polyethylene, polypropylene, polystyrene, polyurethane, etc. is a suitable material. Note that, depending on the needs of the packaged article, a composite laminated sheet material in which other foamed or non-foamed sheet materials, mesh materials, etc. are laminated and adhered to a synthetic resin foam may be used.

The central bottom lifting circular convex portion 12 is formed in the central portion of the packaging device 10, and its upper surface side forms an article placement surface on which the bottom of the article to be packaged is placed.

As shown in the figure, the wrapping piece 13 extends from the circular convex portion 12 to the lower part outward so as to lift the raised circular convex portion 12 at the central bottom upward and invert inwardly as the circular convex portion 12 descends. It is extended with an inclination to. This wrapping piece 13 is formed with a gentle slope so that it is reversed (turned inside out) when the article to be packaged A is placed on the raised circular convex portion 12 and descends downward.

It should be noted that radial vertical ribs (not shown) or the like may be formed on the wrapping piece 13 in order to provide stiffness to the portion and to more effectively invert the wrapping piece 13 inward. There is. The radial vertical ribs also have the advantage of increasing the cushioning properties and heat retention (cold retention) of the packaged article after it is inverted.

As mentioned above, it is known that the wrapping piece 13 is lifted upward by reversing the circular convex portion 12 of the base sheet 11 and wraps around the article. However, although the conventional wrapping piece flips upward, it does not completely wrap the article to be wrapped, but only with manual assistance. Rather, conventional products were based on the premise that each product was individually wrapped manually, like the reticulated net described above. However, in response to recent mechanization and unmanned packaging processes, the present invention has developed a packaging material structure that can reliably wrap around the packaged article as soon as the packaged article is supplied to the packaging material. It is intended to provide the following.

In the present invention, as shown in FIGS. 3 and 4, when the circular convex portion 12 is lowered due to accommodation (placing) of the packaged article A, the load force P (FIG. 4) due to the placement is The stiffness is transmitted to the groove-shaped annular inversion base 20 formed between the circular convex portion 12 and the wrapping piece 13, and the groove-shaped annular inversion base 20 has rigidity due to the crushing of the foamed synthetic resin base sheet 11. As a result, the reversing force R (FIG. 4) is effectively transmitted (13R) to the wrapping piece 13 on the outer periphery via this groove-shaped annular reversing base 20, and as a result, the packaged articles are securely And it wraps it efficiently.

This groove-shaped annular inverted base 20 can be simply and easily formed by crushing the base sheet 11 during molding of the packaging material 10 by known vacuum molding or the like.

Note that, as shown in FIGS. 3 and 5, this groove-shaped annular inversion base 20 serves as the grounding part 10G of the packaging device after the wrapping piece 13 is inverted, so that it forms an annular buffer at the bottom of the packaged object. It is possible to form a section and stabilize the packaging posture.

Since the thickness of the base sheet is generally 2.5 to 5.5 mm, the thickness of the annular inverted base 20 due to the crushing is 0.5 to 1.5 mm. The annular inverted base 20 can be formed simply, economically, effectively, and reliably.

Furthermore, although the groove width of the annular inverted base 20 is generally 2.5 to 5.5 mm, it is possible to effectively and reliably form an appropriate annular inverted base 20 depending on the properties of the packaged object. .

As illustrated and explained above, according to the packaging device of this invention, in response to the recent mechanization and unmanned packaging process, for example, if an article to be packaged is supplied to the packaging material on a conveyor and placed, the packaging device will be wrapped by its own weight. The wrapped piece of material can automatically and reliably wrap around the article to be packaged, and the mechanization and unmanned packaging process can be dramatically improved, making it extremely advantageous in industry.

10 Packaging tool 11 Soft base sheet 12 Circular convex portion 13 Wrapping piece 20 Annular inverted base
A Packaged goods
P pressure
R Reversing force
G Grounding part

Claims (4)

A wrapping piece made of a soft base sheet mainly made of synthetic resin foam, wherein the substantially central bottom of the base sheet is formed as a circular convex portion that lifts upward, and the wrapping piece wraps the article to be packaged around the outer periphery of the circular convex portion. are integrally extended radially, and when the article to be packaged is accommodated in the lifting convex portion, the circular convex portion is lowered and the wrapping piece is lifted upward to wrap around the article to be packaged. A packaging material characterized in that a groove-shaped annular inverted base is formed by crushing the base sheet between the convex part and the wrapping piece. The packaging material according to claim 1, wherein the annular inversion base becomes a grounding part after the wrapping piece is inverted. The packaging material according to claim 1, wherein the base sheet has a thickness of 2.5 to 5.5 mm, and the crushed annular inverted base has a thickness of 0.5 to 1.5 mm. The packaging material according to claim 1, wherein the groove width of the annular inverted base is 2.5 to 5.5 mm.

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