JP7376844B2 - packaging container - Google Patents

Description

TECHNICAL FIELD This invention relates to packaging containers, and particularly to containers from which the contents can be easily pushed out.

In order to smoothly take out the contents from the container, it is known that a hole protrusion is provided at the bottom, and the contents are taken out by using air that enters through the hole formed at the bottom by folding the hole protrusion. (Patent Document 1, Patent Document 2). Since it is necessary to make a hole at the bottom when the drilling protrusion is folded, the material is basically limited to plastic, and precision machining is required to form the drilling protrusion.

Japanese Unexamined Patent Publication No. 53-23779 Japanese Unexamined Patent Publication No. 53-133184

An object of this invention is to enable the contents to be taken out from the container more easily.

The packaging container according to the present invention includes a cylindrical upper body having an upper opening closed by a lid, a bottomed cylindrical lower body provided at a distance from the upper body, an upper body, and a lower body. a cylindrical flexible body having a lower strength than the upper body and the lower body, fixed to each of the upper body and closing the gap between the upper body and the upper body; A pair of integrally formed finger rests are provided at each position. Packaging containers generally have a cylindrical shape (inverted truncated cone shape) with a diameter slightly larger at the top than at the bottom, but even if the diameter at the top is slightly smaller than at the bottom, or if the diameter is constant in the vertical direction, the cross-section may be a polygonal cylindrical shape.

The strength of the cylindrical flexible trunk is less than that of the upper and lower trunks, so when you bring the two trunks closer together (pushing one toward the other), the upper and lower trunks The cylindrical flexible body can be deformed without deforming the body or while keeping the degree of deformation small.

It is sufficient that there is a difference in strength between the upper body part, the lower body part, and the cylindrical flexible body part. However, if the strength difference is too small, it will be difficult to maintain the shapes of the upper and lower trunks (the flexible trunk will naturally deform, but the upper and lower trunks will also deform at the same time). In other words, the strength difference (strength Preferably, the ratio (ratio) is between the upper body and the lower body and the flexible body.

The desired strength difference can be created by using different materials or configurations (materials, layer configurations, etc.) of the upper body, the lower body, and the flexible body. Additionally or alternatively, the thickness of the upper body, lower body and flexible body may be different to create the desired strength difference. That is, the upper body part, the lower body part, and the flexible body part may be made of the same material, and in this case, by making the thicknesses different, a desired strength difference can be created. Considering the use as a packaging material for packaging things, the materials for the upper and lower body parts include, for example, resins such as polystyrene, polyethylene, polyethylene terephthalate, polypropylene, nylon, paper, metals such as aluminum foil, etc. Examples include laminates. Examples of materials for the flexible body include resins such as polystyrene, polyethylene, polyethylene terephthalate, polypropylene, and nylon, metals such as aluminum foil, and laminates thereof.

According to this invention, since a pair of finger hooks are integrally formed at mutually opposing positions of the upper body, by hooking one's fingers on the finger hooks and pushing in the lower body, the flexible body can be moved. It is possible to deform (crumple) the upper body and the lower body to smoothly bring them closer together, and the contents can be smoothly discharged from the upper opening of the upper body. For example, when the contents are soft foods such as pudding or jelly, the contents can be pushed out of the packaging container while retaining its original shape.

In one embodiment, the gap between the upper trunk and the upper trunk is closed by a strip-shaped zipper part that connects to each of the upper trunk and the lower trunk through an easy-to-cut line. The cylindrical flexible trunk section, which has low strength, can be protected by the band-shaped zipper section. By cutting the band-shaped zipper portion along the easy-to-cut line, the distance between the upper body part and the lower body part can be reduced.

Preferably, each of the pair of finger hooks is formed from an arcuate easy-to-remove line extending from the upper trunk to the belt-shaped zipper portion, and an opening (finger-hole) formed inside the arcuate easy-to-remove line. There is. By cutting off the band-shaped zipper part, a pair of finger hooks that are integrated with the upper body part are formed. For example, by inserting the index fingers of both hands into the openings of the pair of finger hooks and pressing the bottom or the edge of the lower body with the thumbs of both hands, the distance between the upper body and the lower body becomes closer and the contents are released. It can be taken out smoothly from the upper opening of the upper body.

Preferably, the diameter increases overall from the bottom to the top. When the distance between the upper body and the lower body is brought closer, the flexible body and the lower body can be housed inside the upper body, making it possible to reduce the volume of the packaging container. can.

It is a perspective view of a push-out cup. FIG. 2 is a partially cutaway front view taken along line II-II in FIG. 1. FIG. FIG. 3 is a developed view of the body portion constituting the extruded cup. FIG. 3 is a perspective view of the push-out cup with the strip zipper portion cut away. FIG. 3 is a perspective view showing how the contents are being pushed out from the push-out cup. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. FIG.

1 to 6 show a packaging container (push-out cup) according to an embodiment of the invention. Figure 1 is a perspective view of the packaging container, Figure 2 is a partially cutaway front view of the packaging container taken along line II-II in Figure 1, and Figure 3 is a developed view (blank) showing the body of the packaging container from the outside. Figure 4 is a perspective view of the packaging container with the belt-shaped zipper part of the body part removed, which will be described later. Figure 5 is a perspective view of the packaging container with the contents being pushed out. A cross-sectional view taken along line VI-VI of No. 5 is shown in each case.

The packaging container 1 is composed of a body 10 and a bottom 20. The body 10 has a cylindrical shape with a diameter that is large at the top and becomes smaller toward the bottom, and the upper peripheral edge of the body 10 that opens is rolled outward to form a curled portion 11. ing. The upper peripheral end portion of the body portion 10 may be simply folded to form a flange portion that slightly expands outward. The opening of the body 10 is closed by bonding a lid (not shown) to the annular upper surface formed by the curled portion 11. The bottom portion 20 is circular, and its peripheral edge is bent downward (bent portion 21). The bottom part 20 fits snugly into the opening at the lower end of the body part 10, and the lower end part of the body part 10 is folded back inward (folded part 12), and this folded part 12 sandwiches the bent part 21 of the bottom part 20. The inner and outer surfaces of the bent portion 21 of the bottom portion 20 and the inner surface of the folded portion 12 at the lower end of the body portion 10 sandwiching the bent portion 21 are bonded or welded.

Referring to FIG. 3, the body 10 constituting the packaging container 1 is made from an arcuate blank. The cylindrical body 10 is made by gluing the sides of an arc-shaped blank to form a cylinder, and folding back the upper and lower edges as described above.

Referring to FIGS. 1 to 3, two easy-to-cut lines (cut lines) 16 and 17 are vertically spaced from each other and extend parallel to each other in an arc shape in the direction connecting both side edges of the body 10. has been done. The easy resection lines 16 and 17 are formed by a plurality of intermittently formed incision lines, perforations, half cuts, front and back half cuts, etc. The area sandwiched by the two easy-to-remove lines 16 and 17 is hereinafter referred to as the "band-shaped zipper portion 18." In order to make the belt-shaped zipper part 18 easier to cut out (grasp), the belt-shaped zipper part 18 is formed with an outwardly arcuate cut line 18A.

As will be described later, by cutting the band-shaped zipper portion 18 from the trunk 10 along the easy-to-cut lines 16 and 17, the trunk 10 is divided into upper and lower halves. Hereinafter, the upper part of the body 10 divided into two parts will be referred to as the "upper body part 10a", and the lower part will be referred to as the "lower body part 10b".

Referring to FIGS. 1 to 3, among the two easy-to-cut lines 16 and 17 formed on the trunk 10, on the upper easy-to-cut line 16, there is a From the upper trunk portion 10a to the belt-shaped zipper portion 18, two approximately semicircular downward arc-shaped easy-to-cut lines (cutoff lines) 33 are formed at intervals. Furthermore, a circular finger hole 32 is formed inside the approximately semicircular easy resection line 33. The portion sandwiched between the finger hook hole 32 and the semicircular easy-to-remove line 33 is hereinafter referred to as the "finger hook portion 31."

The two finger hook portions 31 (easy resection line 33 and finger hook hole 32) are formed at locations that are just opposite sides of the body portion 10 when the blank is made into a cylindrical shape. In FIGS. 1 and 2, only one of the two finger rests 31 is shown.

Referring to FIGS. 2 and 3, the body 10 has a laminated structure in which a base sheet (outer layer material) 13 and a flexible film (inner layer material) 14 are laminated. A base sheet 13 is located on the outside (front side) of the body 10, and a flexible film 14 is located on the inside (back side).

The base sheet 13 is, for example, a flat paper material, and can have a basis weight of, for example, 260 g/m ² . The flexible film 14 is a laminate composed of a resin film or a metal film, and as an example, from the inside to the outside, 40 μm thick polyethylene (PE) / 12 μm thick polyethylene terephthalate (PET) / adhesive A laminate of aluminum (AL) with a thickness of /7 μm and ethylene/methacrylic acid copolymer (EMAA) with a thickness of 15 μm is used. The materials of the base sheet 13 and the flexible film 14 are appropriately selected according to the functions required of the packaging container 1 (light-shielding properties, oil resistance, water resistance, etc.), and their thicknesses are also adjusted as appropriate according to the contents, etc. Ru. The flexible film 14 is thin (several tens of μm in total as described above) and flexible. On the other hand, the base sheet 13 is made of a thick paper material, etc., has greater strength (stiffness) and weight than the flexible film 14, and is generally not flexible (of course, it is not flexible). ). As an example, the base sheet 13 is made of paper having a thickness of 280 μm and a loop stiffness value of 2800 mN/15 mm. The flexible film 14 is a laminate having a thickness of 74 μm and a loop stiffness value of 13 mN/15 mm. In this case, the difference in strength between the base sheet 13 and the flexible film 14 is 2787 mN/15 mm.

When the loop stiffness value was measured for the above-mentioned base sheet 13 (paper material) and flexible film 14 (laminate) laminated together, it was 3759 mN/15 mm, which is the same as that of the base sheet 13 (paper material) alone. The loop stiffness value and the loop stiffness value larger than that of the flexible film 14 (laminate) alone were measured.

The above-mentioned loop stiffness value represents the stiffness of a thin material, and can be measured using, for example, a loop stiffness tester (manufactured by Toyo Seiki Seisakusho Co., Ltd.). The unit of measurement value is mN/15mm. The loop stiffness value refers to the crushing resistance of a loop-shaped member.More specifically, the loop stiffness value is defined as the crushing resistance of a loop-shaped member. It means the resistance value when the loop-shaped member is pushed to the above-mentioned set distance with an indenter. Thin materials with a large value can be said to have stiffness (strong stiffness). The specific values of the loop stiffness values of the base sheet 13 and flexible film 14 described above are determined by preparing a test piece with a width of 15 mm and a length of 165 mm, setting the loop length to 120 mm, and adjusting the distance between the indenter and the chuck. It is measured assuming that the diameter is 20mm. In detail, a loop-shaped test piece with a loop length of 120 mm was made by gripping both ends of the test piece with the above dimensions with chucks at a distance of 120 mm, and moving the chucks closer to each other (at the base of the loop-shaped test piece). Using an indenter, push the loop-shaped test piece toward the chuck until the distance between the indenter and the chuck becomes 20 mm, crushing the loop-shaped test piece. The value (resistance value) measured at this time is the loop stiffness value. "Strength" described in this specification may be read as "loop stiffness value" or "lumbar strength".

Regarding the paper material (base material sheet 13), while the indenter was being pressed in, the paper folded before reaching the set indenter-chuck distance of 20 mm. The loop stiffness value (2800 mN/15 mm) of the paper material is the maximum value measured just before the paper folds (the distance between the indenter and the chuck is less than 20 mm).

Referring to FIG. 2, the bottom portion 20 can also be composed of a base sheet 22 and a flexible film 23. The base sheet 22 and flexible film 23 constituting the bottom portion 20 may be made of the same material as the base sheet 13 and flexible film 14 constituting the body portion 10, respectively, or may be made of different materials.

The flexible film 14 provided on the entire back surface (inner surface) of the base sheet 13 is not bonded to the base sheet 13. As shown in FIGS. 1 and 2, in the completed packaging container 1, the upper end of the body 10 is caulked by the curled part 11, and the lower end is caulked by the folded part 12. The outer base sheet 13 and the inner flexible film 14 are integrated (fixed). However, the upper and lower end portions of the flexible film 14 may be adhered to the upper and lower end portions of the base sheet 13 using an adhesive or the like.

In the cylindrical body part 10, the strip zipper part 18 goes around the body part 10 once (it does not have to go around completely). Referring to FIG. 4, when strip-shaped zipper section 18 is cut out along easy-cut lines 16 and 17, flexible film 14 located inside the cut-out strip-shaped zipper section 18 is exposed. By cutting out the belt-shaped zipper part 18, the body part 10 (overlapping part of the base sheet 13 and flexible film 14) is separated into an upper body part 10a and a lower body part 10b with the exposed flexible film 14 in between. Divided into. Easy-to-cut lines 16 and 17 are formed on the base sheet 13 constituting the trunk 10, and no easy-to-cut lines are formed in the flexible film 14, so the belt-shaped zipper part 18 is cut along the easy-to-cut lines 16 and 17. Even if the area is cut out, the area remains covered by the flexible film 14, and the barrier properties of the packaging container 1 can continue to be ensured. Hereinafter, the portion of the cylindrical flexible film 14 that is revealed by cutting off the strip-shaped zipper portion 18 will be referred to as the "flexible body portion 14."

The strip-shaped zipper portion 18 is typically cut off when pushing out the contents N, such as pudding or jelly, packaged by the packaging container 1. Referring to FIGS. 5 and 6, after cutting off the strip zipper portion 18, the packaging container 1 is turned upside down and the lower body portion 10b is pushed toward the upper body portion 10a. The upper and lower body parts 10a and 10b, which have relatively high strength, hardly deform, and only the flexible body part 14, which has low strength, deforms. The upper end portion of the lower body portion 10b fits inside the upper body portion 10a, and the upper body portion 10a and the lower body portion 10b partially overlap. The flexible body 14 between the upper body 10a and the lower body 10b is sandwiched and hidden between the inner surface of the upper body 10a and the outer surface of the lower body 10b. The back (height) of the packaging container 1 becomes shorter, the distance between the bottom 20 of the packaging container 1 and the upper opening of the packaging container 1 becomes shorter, and the contents N in the packaging container 1 are pushed out. In addition, by reducing the height, the packaging container 1 becomes compact, and the amount of waste generated when the packaging container 1 is disposed of can be reduced.

When pushing out the contents N, the pair of finger hooks 31 can be used. By inserting the index fingers of both hands into the finger hook holes 32 of the finger hook portion 31 and pressing the bottom 20 (or the edge of the bottom 20) of the packaging container 1 with the thumbs of both hands, the contents N in the packaging container 1 can be smoothly transferred. It can be pushed outside.

In the above-mentioned embodiment, the base sheet 13 and the flexible film 14 are made of materials with relatively large differences in strength. Specifically, the base sheet 13 is made of paper with a loop stiffness value of 2800 mN/15 mm. An example was explained in which a PE/PET/adhesive/aluminum/EMAA laminate with a loop stiffness value of 13 mN/15 mm was used as the flexible film 14 (the strength difference was 2787 mN/15 mm as described above), but It is also possible to use a combination of materials with small differences in strength. For example, as the base sheet 13, a 200 μm thick polypropylene (PP) sheet may be used instead of the above-mentioned paper material. The loop stiffness value of this PP sheet was 496 mN/15 mm. By using a PP sheet as the base sheet 13 instead of paper material, the difference in strength between the base sheet 13 and the flexible film 14 becomes smaller (in the above case, the strength difference is 483 mN/15 mm), but this strength difference It has been confirmed that even if the shape of the base sheet 13 is maintained as it is, only the flexible film 14 can be deformed (stretched and contracted). Of course, a difference in strength may be created between the base sheet 13 and the flexible film 14 by using the same material for the base sheet 13 and the flexible film 14 and having different thicknesses.

In the above-mentioned embodiments, a cylindrical container was described, but the container is not limited to a cylindrical shape, and may be a polygonal cylinder, for example, a container having a cross section of a quadrangle, hexagon, or octagon.

1 Packaging container (push-out cup)
10 Torso
16, 17, 33 Easy resection line
18 Strip zipper section
13 Base material sheet
14 Flexible film (flexible body)
31 Finger rest
32 Finger hole

Claims (4)

a cylindrical upper body having an upper opening closed by a lid;
A bottomed cylindrical lower body spaced apart from the upper body;
a cylindrical flexible trunk having a lower strength than the upper trunk and the lower trunk, fixed to each of the upper trunk and the lower trunk and closing the gap between the upper trunk and the lower trunk; and a pair of finger rests integrally formed at mutually opposing positions of the upper body , and an opening is formed in the pair of finger rests ,
packaging container. The gap between the upper body part and the lower body part is closed by a band-shaped zipper part connected to each of the upper body part and the lower body part through an easy-to-cut line,
The packaging container according to claim 1. Each of the pair of finger hooks is formed from an arc-shaped easy-to-remove line formed from the upper body part to the belt-shaped zipper part, and an opening formed inside the arc-like easy-to-remove line,
The packaging container according to claim 2. The diameter increases overall from the bottom to the top.
The packaging container according to any one of claims 1 to 3.

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