JP7419705B2 - Method for manufacturing packaging containers - Google Patents

Description

The present invention relates to a packaging container whose opening is kept wide open after opening, making it easy to take out the contents.

Traditionally, cooked food or semi-cooked food is filled in a packaging bag made of flexible material, sealed, and sterilized under pressure and heat. Food products are widely distributed. In this type of food, the contents are usually heated and then transferred to tableware for consumption.

In recent years, there has been a demand for this type of food to be able to be eaten using a packaging bag instead of tableware without transferring the contents to tableware. It has been proposed to use a packaging bag instead of tableware by opening the top of the bag horizontally and then folding back the top end to hold the bag open.

JP2019-26271A

However, packaging bags made of flexible materials have poor shape retention, so there is still room for improvement when used as a substitute for tableware. That is, in order to be able to eat the contents without transferring them to tableware after opening, it is necessary to keep the opening wide open so that the contents can be easily taken out.

The inventors of the present invention have focused on this point, and have conducted extensive studies to maintain the opening opening of packaging bags, which have poor shape retention, in a wide open state and to make it easier to take out the contents from the packaging bag after opening. As a result of repeated efforts, the present invention was completed.

The method for manufacturing a packaging container according to the present invention includes a container body made of a flexible material in the form of a bag, and a box-shaped exterior body that accommodates the bottom side of the container body, The container body has a band-shaped hanging piece that hangs down in a band-like manner along the circumferential direction, and the upper end edge side of the exterior body is sandwiched between the outer circumferential surface of the container body and the band-shaped hanging piece, so that the container body and A method for manufacturing a packaging container that can be removably integrated with the exterior body, the method comprising: prior to bag-making the container body, the inner layers of the flexible material are overlapped in a band shape, and the inner layers of the flexible material are overlapped in the band shape. There is a method of forming the band-like hanging piece by heat-sealing the parts.

According to the present invention, when opening the container body and taking out the contents, it is possible to keep the opening of the container body, which has poor shape retention, in a wide open state, thereby making it easier to take out the contents. be able to.

1 is a front view schematically showing a packaging container according to an embodiment of the present invention. FIG. 2 is an end view taken along the line AA in FIG. 1; FIG. 1 is a rear view schematically showing a packaging container according to an embodiment of the present invention. 1 is a side view schematically showing a packaging container according to an embodiment of the present invention. It is an explanatory view showing the process of making a bag of a container main body. It is an explanatory view showing the process of making a bag of a container main body. It is an explanatory view showing a process of accommodating a container body filled with contents and sealed in an exterior body. It is a development view showing an example of an exterior body. It is an explanatory view showing how to open the container body and eat the contents.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a front view schematically showing a packaging container according to this embodiment, FIG. 3 is a rear view thereof, and FIG. 4 is a side view thereof. The packaging container 1 shown in these figures includes a container body 2 made of a flexible material into a bag shape, and a box-shaped exterior body 3 that accommodates the bottom side of the container body 2. There is.

1, 3, and 4 show an example of a packaging container 1 in which a container body 2 filled with cooked food or semi-cooked food and sealed is housed in an exterior body 3. In such an example, the bottom side of the container body 2 that has been expanded by the contents forms a flattened bottom surface, while the corners folded into a triangular shape are folded upward to form the inner surface of the exterior body 3. It is accommodated in a bent state along the (see Fig. 7).

In the present embodiment, the vertical and horizontal directions, as well as the vertical and horizontal directions, are determined based on the state in which the packaging container 1 is erected with the bottom surface of the exterior body 3 grounded on a horizontal surface (the state shown in FIG. 1).

The exterior body 3 has a bottom part 30 that supports the container main body 2 from below, a front part 31, a back part 32, and a side part 33 that support the container main body 2 from the sides, and has an opening on the top surface side. It can be formed in the shape of a cube or a rectangular parallelepiped box. The container body 2 filled with contents and sealed is housed by being pushed into the exterior body 3 from the opening, but if the container body 2 is formed into a box shape surrounding the bottom side of the housed container body 2. The specific form of the exterior body 3 is not particularly limited.

Furthermore, from the viewpoint of protecting the container body 2 from the impact when the packaging container 1 is accidentally dropped, it is preferable that the bottom portion 30 is provided so as to cover the entire bottom side of the exterior body 3. As long as the container main body 2 can be supported from below, the bottom part 30 may be provided so as to partially span between the front part 31 and the back part 32.

The material used for the exterior body 3 is not particularly limited as long as it can maintain a box-like shape, but it is preferable to use a general-purpose material such as cardboard, which is relatively low cost and easy to process.
For example, as shown in FIG. 8, cut cardboard is made to have a crease as shown by the chain line in the figure, adhesive is applied to the gluing margin 36, and the paper is assembled into a box shape. be able to. The adhesive tape 36 may be omitted and assembly may be performed using adhesive tape.

In the example shown in FIG. 8, the side portions 33 are also bent along with the boundaries of each portion. When the exterior body 3 is formed in the shape of a cube or a rectangular parallelepiped box, the side surface portion 33 has a diagonal line TL extending from the center of the upper end edge to both ends of the lower end edge of the side surface portion 33, as shown in the figure. 33 (preferably the former) or a vertical line VL extending from the center of the upper edge to the center of the lower edge. By doing so, when the container body 2 filled with the contents and sealed is pushed into the exterior body 3, the side portions 33 are easily deformed along the folds so that they are pushed outward. (see FIG. 7), which is preferable because the container body 2 can be pushed into the exterior body 3 without any force.

As the flexible material used to bag the container body 2, various film materials used for packaging bags for pressure-heated foods or retort foods can be used.
For example, an outer layer consisting of a polyester resin film such as polyethylene terephthalate or a polyamide resin film such as nylon, which has scratch resistance and chemical resistance, and a vapor-deposited thin film of metal oxide or metal such as silica or alumina, or aluminum. An intermediate layer consisting of metal foil such as foil, oxygen barrier resin film such as polyvinyl alcohol resin, ethylene-vinyl alcohol copolymer, polyacrylic acid resin, vinylidene chloride resin, etc., and polyethylene resin with heat sealability. A laminated film formed by laminating an inner layer made of a resin film, a polypropylene resin film, etc. can be used.

Further, the container body 2 has a band-shaped hanging piece 20 that hangs down in a band-like manner along the circumferential direction. The band-shaped hanging piece 20 hangs down so as to cover the outer circumferential surface of the container body 2, and when the container main body 2 is housed in the exterior body 3, the outer circumference is formed between the outer circumferential surface of the container body 2 and the band-shaped hanging piece 20. It is formed so that the upper edge side of the opening of the body 3 is sandwiched (see FIG. 2).

This makes it possible to detachably integrate the container body 2 and the exterior body 3, and prevent the container body 2 and the exterior body 3 from being inadvertently separated during the distribution process. On the other hand, it can be easily separated at the time of disposal, making it possible to simplify separate disposal.

Further, it is preferable that an easy-to-open line 25 is formed on the container body 2 along the upper edge of the band-shaped hanging piece 20 to facilitate opening of the container body 2. The easy-to-open line 25 can be formed as a linear thin section by subjecting the flexible material forming the container body 2 to, for example, laser processing or half-cutting with a laser blade (see Fig. 2 reference).

In this embodiment, the container body 2 is made into a bag called a back pouch (or gassho pouch) except for having a band-like hanging piece 20, and the easy-open line 25 of the back seal part 21 A notch 26 is formed at the corresponding location. As a result, when the user eats the contents filled in the container body 2, the user can tear the container body 2 along the easy-to-open line 25 starting from the notch 26 formed in the back sticker 21. , the container body 2 can be easily opened.

In this embodiment, a notch 35 is formed in the back surface 32 of the exterior body 3 to avoid interference with the back sticker 21 of the container body 2.

The container body 2 opened in this manner is left in a wide open state as shown in FIG. Retained. Thereby, the contents can be easily taken out from the container body 2 after opening. Moreover, since the shape retention is enhanced by the exterior body 3 that accommodates the bottom side of the container body 2, it is possible to eat the contents as they are without transferring them to tableware.

Such an effect can also be obtained by cutting the container body 2 along the upper edge of the band-shaped hanging piece 20 using a cutting tool such as scissors or a cutter, but it is also possible to cut the container body 2 along the upper edge of the band-shaped hanging piece 20. By doing so, the container body 2 is torn straight along the easy-to-open line 25 and opened.
As a result, even if the user touches the opening of the container body 2 with his or her mouth, the user is less likely to feel uncomfortable. Furthermore, the opening of the container body 2 has an increased thickness due to the upper edge side of the exterior body 3 being sandwiched between the outer peripheral surface of the container body 2 and the band-shaped hanging piece 20. discomfort is further reduced.

Such a container body 2 can be made into a bag in the following manner, for example.
First, an easy-to-open line 25 is formed on the outer layer side of the flexible material (see FIG. 5(a)), and the flexible material is folded back to the inner layer side by a predetermined width parallel to the easy-to-open line 25. The portion that generally overlaps with the easy-to-open line 25 is further folded back (see FIG. 5(b)), and the portion where the inner layers of the flexible material overlap each other in a band shape is heat-sealed (see FIG. 5(c)). Through these steps, the easy-to-open line 25 and the band-like hanging piece 20 are formed on the flexible material.

The position where the band-shaped hanging piece 20 is formed and the width of the band-shaped hanging piece 20 are such that when the container body 2 is housed in the exterior body 3, the upper edge side of the opening of the exterior body 3 is aligned with the outer peripheral surface of the container body 2 and the band-shaped hanging piece 20. The shape and size of the container body 2 and the exterior body 3 can be adjusted as appropriate so that the container body 2 and the exterior body 3 can be integrated with each other in a detachable manner. .
Further, it is preferable that the upper end edge of the band-shaped hanging piece 20 and the easy-to-open line 25 are formed so as to be as close to each other as possible, and it is more preferable that the easy-to-open line 25 is formed so as to overlap the upper end edge of the band-like hanging piece 20. .

As described above, the flexible material is embossed with guide lines 27 to make it easier to fold the bottom corner of the container body 2 into a triangular shape when the container body 2 is housed in the exterior body 3. It can also be formed at a position corresponding to the bottom corner (see FIG. 6) of the bag-made container body 2 by processing or the like.

Next, with the band-shaped hanging piece 20 extending along the circumferential direction, both end edges of the flexible material are brought together so that the inner layer is on the inside, and the inner layers are heat-sealed. As a result, a back seal portion 21 is formed, and the inner layers at the lower edge portions are heat-sealed to each other to form a bottom seal portion 22. Through these steps, a bag-shaped container body 2 with an open top is produced (see FIG. 6).

In the examples shown in FIGS. 5 and 6, each of the above steps is performed on a flexible material cut into a predetermined shape and size. Needless to say, each of the above steps may be performed while unwinding the flexible material.

The container main body 2 bag-formed in this way is transported to a filling process with its upper side open and filled with contents. Then, by heat-sealing the upper edge of the container body 2, a top seal portion 23 is formed and sealed. The container main body 2 filled with contents and sealed in this way is sterilized by pressure and heating, and then accommodated in the outer package 3 as shown in FIG. 7. That is, by bending the bottom seal portion 22 and folding the bottom corner of the container body 2 into a triangular shape to make the bottom flat, the bottom side of the container body 2 is shaped so that it can be accommodated in the exterior body 3. Arrange. Then, while folding the folded corner upward and pushing it into the exterior body 3, the upper edge side of the exterior body 3 is sandwiched between the outer peripheral surface of the container body 2 and the band-shaped hanging piece 20, and the exterior body 3 be accommodated in.

The exterior body 3 may be conveyed to the filling process in an unfolded state as shown in FIG. 8 and assembled at a desired time, or the assembled exterior body 3 may be stacked in multiple stages during the filling process. It may also be transported to
In addition, after the container body 2 filled with contents and sealed is sterilized, the container body 2 is individually stored in an outer box and offered to the market, and the user who purchased this can process the outer box. It may also be possible to use it by assembling it into the exterior body 3.

Although the present invention has been described above by showing preferred embodiments, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made within the scope of the present invention. Nor.

The packaging container 1 according to the present invention is particularly suitable for use in stores such as convenience stores, where the contents are heated in a microwave oven and eaten as is in the eat-in corner. In this case, it is sufficient to open only the vicinity of the notch 26 formed in the back sticker 21 to allow the steam inside to escape. On the other hand, the container body 2 may be provided with a steam venting mechanism disclosed in Japanese Patent No. 6245490, Japanese Patent Application Publication No. 2017-214129, and the like.

Furthermore, when the contents are heated and eaten, the heat insulating effect of the outer package 3 prevents problems such as the packaging container 1 being too hot to be held, and the contents are less likely to cool down. On the other hand, in order to enhance the heat insulation effect of the exterior body 3, a heat insulating material such as a foam sheet may be laminated on the exterior body 3.

Moreover, the packaging container 1 according to the present invention is not limited to applications where the contents are eaten without transferring to tableware, and the opening of the container body 2 can be held in a wide open state, This makes it possible to easily take out the contents, which can be applied to various uses. For example, it is also possible to use the container as a packaging container that contains flour, coffee powder, detergent powder, etc., and uses these containers to be taken out in small quantities. When used for such purposes, although not particularly shown in the drawings, a member called a zipper that can be resealed by mating irregularities may be attached to the inner surface of the container body 2 near the opening.

Moreover, in the embodiment described above, an example was shown in which the container main body 2 was made into a back-attached pouch. On the other hand, the container body 2 may be made into other forms such as a flat pouch, a standing pouch, or a gusseted pouch.

In short, in the packaging container 1 according to the present invention, the container main body 2 has a band-like hanging piece 20 that hangs down in a band-like manner along the circumferential direction, and between the outer peripheral surface of the container body 2 and the band-like hanging piece 20, the container body If the upper edge side of the box-shaped exterior body 3 that accommodates the bottom side of the container body 2 and the exterior body 3 are sandwiched together so that the container body 2 and the exterior body 3 can be detachably integrated, other The detailed configuration can be changed as appropriate without being limited to the embodiment described above.
Further, the detailed configurations described in the embodiments described above can be selected and combined as appropriate.

1 Packaging container 2 Container body 20 Band-shaped hanging piece 25 Easy-open line 3 Exterior body 30 Bottom part 31 Front part 32 Back part 33 Side part TL Diagonal line VL Vertical line

Claims (4)

A container body made of a flexible material in the form of a bag;
and a box-shaped exterior body that accommodates the bottom side of the container body,
The container body has a band-like hanging piece that hangs down in a band-like manner along the circumferential direction,
A method for manufacturing a packaging container in which the upper edge side of the exterior body is sandwiched between the outer circumferential surface of the container body and the band-shaped hanging piece, so that the container body and the exterior body can be removably integrated. ,
Prior to bag making of the container body, the inner layers of the flexible material are overlapped in a band shape, and the overlapping part of the band shape is heat-sealed to form the band-shaped hanging piece . Method for manufacturing packaging containers. 2. The method of manufacturing a packaging container according to claim 1, wherein an easy-to-open line is formed on the container body along the upper edge of the hanging strip. The exterior body has a bottom part that supports the container main body from below, a front part, a back part, and a side part that supports the container main body from the sides, and is cubic or rectangular parallelepiped with an opening on the top surface side. 3. The method for manufacturing a packaging container according to claim 1, wherein the packaging container is formed into a box shape. Either a diagonal line running from the center of the upper edge of the side surface to both ends of the lower edge, or a vertical line running from the center of the upper edge of the side surface to the center of the lower edge of the side surface. 4. The method for manufacturing a packaging container according to claim 3, wherein the packaging container is formed with a folding pattern consisting of one or both of the following.

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