JP2012111502A - Resealable unsealing device for paper container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resealable unsealing device for a paper container having a simple structure capable of easily unsealing and resealing.SOLUTION: The paper container 1 composed of a top surface 2, a bottom surface 3, side surfaces (front surface 4a, rear surface 4b and side surfaces 4c and 4d) is provided with the resealable unsealing device 8 composed of an unsealing part 6 and a holding part 7. The unsealing part 6 for ejecting a contained liquid 5 is perforated in a U-shape in a part near the top surface 2 of the side surface 4c. A flap 9 projecting continuously from the top surface 2 toward the side surface 4c is bent at 90° while covering the unsealing part 6, and then, adhered to the side surface 4c. The holding part 7 provided on the side surface 4c is a rectangular shape having long sides 7a, 7b and short sides 7c, 7d, and both the short sides 7c, 7d and the lower long side 7b are adhered to the side surface 4c. The holding part 7 is provided so that the leading end 9a of the flap 9 may overlap the holding part 7 from the upper long side 7a to the nearly center of the holding part 7.

Description

The present invention relates to a resealable opening device for a paper container filled with a content liquid, and more particularly, to a low-cost resealing device that can easily re-seal liquid food by opening the paper container.

Conventionally, many of the paper containers filled with the content liquid are inconvenient because it is necessary to use up or transfer the content liquid to another container once opened. The contents described in Patent Document 1 are known as conventional techniques relating to a resealable opening device for paper containers that solves this problem.

As shown in FIG. 9, the resealable opening device 21 has a base portion 25 bonded along the peripheral edge portion of the opening portion 22 </ b> A of the top surface 22 of the paper container closed with the sealing film 24. A retainer 26 is internally screwed to 25, and a screw cap 27 is externally screwed to the upper portion of the retainer 26. At the lower end of the retainer 26, a sharp end portion 26C for breaking through the sealing film 24 is formed, and the retainer 26 and the screw cap 27 are spot-welded at the welded portion 28. When the screw cap 27 is rotated in the removing direction F, the cap 27 and the retainer 26 are integrally lowered in the base portion 25 to break the sealing film 24. Further, when the cap 27 is continuously rotated, the welded portion 28 is broken and the cap 27 is easily detached. The paper container can be resealed by the cap 27.

Japanese Patent Application Laid-Open No. 11-349024

The conventional resealable opening device has a problem that the screwing structure is complicated and the cost is high. Therefore, the present invention has been made in view of the problems of the prior art, and an object thereof is to provide a paper container re-sealable opening device that can be easily opened and resealed with a simple structure and is low in cost. To do.

The invention of claim 1 includes a thermoplastic resin on the inner and outer surfaces of a paper base, fills the paper base with a content liquid, seals and cuts at a horizontal seal portion, and forms a pillow-shaped prototype container. This is a paper container resealable opening device in which two pairs of flap portions of this prototype container are folded and formed into a top surface and a bottom surface by thermocompression bonding after being continuously formed.
This resealable unsealing apparatus comprises an unsealed portion for dispensing the content liquid formed on the side surface of the paper container and covered with the flap portion, and a holding portion for detachably holding the front end portion of the flap on the side surface. It is characterized by that.

The invention according to claim 2 is the paper container resealable opening device according to claim 1, wherein the holding portion is formed in a rectangular plate shape and a pair of opposing sides are fixed to side surfaces of the paper container. It is characterized by.

A third aspect of the present invention is the paper container resealable opening device according to the first or second aspect, wherein the unsealing portion is formed on the paper base with perforations.

A fourth aspect of the present invention is the paper container resealable opening device according to the third aspect, wherein the opening portion is formed in a U-shape.

According to the first aspect of the present invention, a resealable opening device for a paper container formed by folding two pairs of flap portions and forming a top surface and a bottom surface by thermocompression bonding is formed on the side surface of the paper container. It comprises an unsealed part for dispensing the content liquid to be covered, and a holding part for detachably holding the tip of the flap on the side surface. For this reason, if the said flap is caused, an opening part will open and open. After the content liquid has been poured out from the opening, the opening portion of the flap has resealability because the tip of the flap can be detachably held on the holding portion. As described above, the resealable opening device can be easily manufactured with a simple structure, so that the manufacturing cost is low.

Since the opening portion is covered with the flap, dust or the like does not adhere to the opening portion during the unused period of the opening portion and around the opening after opening, so that mixing into the content liquid can be prevented and thus hygiene can be maintained.

According to the invention of claim 2, the holding portion has a simple structure in which a pair of opposing sides are fixed to the side surface of the paper container with a rectangular plate shape, and the front end of the flap is interposed between the holding portion and the side surface. The portion can be detachably held, and the same effect as in the first aspect can be obtained with certainty.

According to invention of Claim 3, since the said opening part is a simple structure formed in a paper base material with a perforation, manufacturing cost is cheap. And since it can open easily only by pushing in the said opening part, opening property improves.

According to invention of Claim 4, since the said opening part is formed in U shape, when opening a paper container inclining directly, since opening area is large compared with the circular opening shape of the same diameter, it is opening. The gas-liquid replacement at the top becomes easy and the pouring property is improved.

In the embodiment of the present invention, the flap portion 9 of the paper container main body 1a in the paper container 1 having a rectangular parallelepiped appearance covers the opening portion 6 of the side surface 4c, while the front end portion 9a of the flap portion 9 is detachably attached to the side surface 4c. It is a perspective view of the resealable opening apparatus 8 which shows a state provided with the holding part 7 to hold | maintain. In the filling machine (not shown) in the embodiment of the present invention, the vertical line seal S1 is filled into the cylindrical shape while the belt-shaped packaging material 11 is conveyed and the content liquid 5 is filled, and then the horizontal line seal S2 is performed to form the paper container body 1a and the paper container. It is a figure which shows the state which forms 1 continuously. It is an expanded view of the strip | belt-shaped packaging material 11 which forms the paper container 1 in embodiment of this invention. FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3 in the embodiment of the present invention, showing the state of the opening portion 6. It is a perspective view which shows the state which lifted the flap part 9 of the paper container 1, and exposed the opening part 6 in embodiment of this invention. It is a perspective view which shows the state which pushed the straw P in the opening part 6, and opened it in embodiment of this invention. It is a perspective view which shows the state which inclines the paper container 1 and pours the content liquid 5 from the opening 6b in embodiment of this invention. It is a perspective view which shows the state which inserts the front-end | tip part 9a of the flap part 9 in the holding | maintenance part 7, and reseals the opening 6b after opening the opening part 6 in embodiment of this invention. In the conventional example, the retainer 26 is internally screwed to the base portion 25, the screw cap 27 is externally screwed to the upper portion of the retainer 26, and a pointed end portion 26C for breaking through the sealing film 24 is formed at the lower end of the retainer 26. It is sectional drawing which shows the state of the made resealable opening apparatus 21. FIG.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
<Configuration of resealable opening device for paper container>

As shown in FIG. 1, a paper container main body 1a of a rectangular parallelepiped paper container 1 includes a top surface 2, a bottom surface 3, and side surfaces 4 (a front surface 4a, a back surface 4b, a side surface 4c, and a side surface 4d). 5 is filled. A set of resealable unsealing devices 8 including an unsealing portion 6 and a holding portion 7 is formed on the side surface 4c of the paper container body 1a.

More specifically, an opening 6 for pouring the content liquid 5 is formed in a U shape in the vicinity of the top surface 2 on the side surface 4c. Here, since the flap portion 9 continuously protruding from the top surface 2 is bent at 90 degrees along the side surface 4 c and fixed to the side surface 4 c, the opening portion 6 is covered with the flap portion 9. The flap portion 9 is fixed to the opening portion 6 and the surrounding side surface 4c region.

Here, the holding portion 7 provided on the side surface 4c has a rectangular shape with long sides 7a and 7b and short sides 7c and 7d, and the three sides of both the short sides 7c and 7d and the lower long side 7b have a “U-shape”. The tip 9a of the flap 9 is fixed to the side surface 4c and overlaps from the long side 7a of the holding part 7 to the substantially central part of the holding part 7 from the outside. The holding unit 7 is formed of a material having the same configuration as that of the paper container body 1a or a plastic film.

<Paper container formation process>
As shown in FIG. 2 and FIG. 3, in a filling machine (not shown), a strip-shaped wrapping material 11 wound around a roll 12 is fed out and overlapped at both ends 11a in the process of transporting downward, and a cylinder with vertical line seal S1. It is formed in a shape. Then, the content liquid 5 is continuously filled into the cylinder through the filling pipe 13, the horizontal line seal S <b> 2 is formed, and the region E corresponding to one paper container is separated to form a pillow-shaped prototype container 14.

In order to make it easy to mold the paper container body 1a on the belt-shaped packaging material 11, in the region E corresponding to one paper container, the vertical folds 16a, 16b, 16c, 16d, and the horizontal folds 17a, 17b, 17c. 17d, eight fold lines 18 in the oblique direction are formed. And since the content liquid 5 is poured out in the vicinity of the top surface 2 in the side surface 4c, the perforation 6a is formed in a U-shape in the opening portion 6 in order to form the opening 6b.

For this reason, the vertical folds 16a, 16b, 16c, 16d, the horizontal folds 17a, 17b, 17c, 17d, and the eight folds 18 in the oblique direction are bent, and the rectangular top surface 2, bottom surface 3, and four are folded. A rectangular parallelepiped paper container main body 1a composed of side surfaces 4 (front surface 4a, back surface 4b, side surface 4c, and side surface 4d) is easily and continuously formed.

In addition, after the holding part 7 is fixed to the paper container main body 1a by a method not shown, two pairs (four places in total) of the flap parts 9 in the region surrounded by the plurality of oblique folds 18 are respectively folded and heated. A top surface 2 and a bottom surface 3 are formed by pressure bonding.

As shown in FIG. 4, the packaging material 11 is composed of an outer layer 11a, a paper substrate 11b, an adhesive layer 11c, a barrier layer 11d, and two inner layers 11e in this order from the outer side to the inner side. A design or the like 11f is printed in advance on the outer surface of the sheet. The outer layer 11a and the inner layer 11e are formed of a low density polyethylene resin, the adhesive layer 11c is formed of a resin such as polyethylene or an ethylene copolymer, and the barrier layer 11d is formed of an aluminum foil or the like. And in order to make the above-mentioned opening part 6 easy to open, the paper base material 11b is intermittently cut out by the perforation 6a in a planar view U-shape.

<Operation of resealable opening device for paper container>

As shown in FIG. 5 and FIG. 6, when the consumer drinks the content liquid 5 from the paper container 1, if the flap portion 9 fixed to the side surface 4 c is raised upward with a finger, the flap portion 9 is opened as the opening portion 6. Further, since the flap portion 9 fixed by thermocompression is peeled off from the side surface 4c, the opening 6b can be formed by breaking the perforation 6a at the same time.

Even if the perforation 6a is incompletely broken, if the straw P is pushed in accordance with the position of the perforation 6a of the opening 6, the perforation 6a is easily cut to form the opening 6b. The content liquid 5 can be drunk after being inserted. Here, since the shape of the opening part 6 is U-shaped in plan view, the opening area is larger than that of a circular opening having the same diameter, so that the gas-liquid replacement in the opening 6b is easy and the pouring property is improved. In addition, when raising the flap part 9 upwards, it is preferable to tilt the paper container 1 a little and turn the opening part 6 upwards so that the content liquid 5 does not jump out unexpectedly.

As shown in FIG. 7, when the straw is not used in the state where the opening part 6 is opened, the content liquid 5 is easily poured out from the opening 6b as shown by the arrow K only by tilting the paper container 1. Therefore, the content liquid 5 can be poured into another container or the like (not shown) for drinking.

As shown in FIG. 8, when the dispensing of the content liquid 5 from the paper container 1 is temporarily interrupted, the opened opening 6 b is opened by inserting and locking the front end 9 a of the flap 9 into the holding unit 7. It can be easily resealed. For this reason, the resealable opening device 8 has a resealability simply and can reliably prevent leakage of the content liquid, and thus is excellent in convenience.

In this way, compared to the conventional opening portion formed on the top surface of the paper container, the flap portion 9 covers the opening portion 6 with the flap portion 9 and protects it from dust and the like until it is swallowed. improves. Since the paper container can be opened and resealed with a simple and inexpensive structure, the cost of the paper container is reduced and the product value of the paper container is improved. Since the holding part 7 is formed using the same material as the paper container main body, the environmental load during disposal is reduced.

The embodiment of the present invention has been described with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within the scope of the present invention are included in the present invention. It is.

For example, the resealable opening device 8 can be applied to a paper container or the like having a shape in which a top surface and a bottom surface are rectangular and a side surface is formed of eight side surfaces. The shape of the opening part 6 may be circular. The holding portion 7 provided on the side surface 4c may be fixed to the side surface 4c at only two positions of the short sides 7c and 7d. The flap portion 9 may be fixed to the side surface 4c in a region excluding the opening portion 6. In this case, even if the flap portion 9 is raised with a finger, the opening portion 6 is not opened at the same time, so an opening operation with a straw P or the like is necessary. . It is also possible to use a pouring tool other than a straw by inserting it into the opening 6b. If the opening area of the opening 6b is widened with a tool or the like that will not be described after opening, the content liquid can be poured more easily.

The present invention is not limited to the embodiments, and various modifications can be made based on the gist of the present invention, and they are not excluded from the scope of the present invention.

The present invention can be applied to the manufacture of liquid food packaging.

DESCRIPTION OF SYMBOLS 1 Paper container 2 Top surface 3 Bottom surface 4 Side 4a Front surface 4b Back surface 4c Side surface 4d Side surface 5 Contents liquid 6 Opening part 7 Holding part 7a Long side 7b Long side 7c Short side 7d Short side 8 Resealable opening device 9 Flap part 9a Tip Part

Claims (4)

The paper base material is provided with a thermoplastic resin on the inner and outer surfaces, filled with the liquid in the form of a paper base material, sealed and cut at the lateral seal portion to continuously form a pillow-shaped prototype container, and then the prototype. A resealing opening device for a paper container formed by folding two pairs of flap portions of a container and forming a top surface and a bottom surface by thermocompression bonding,
The resealable opening device comprises: an opening portion for discharging the content liquid formed on the side surface of the paper container and covered with the flap portion; and a holding portion for detachably holding the front end portion of the flap on the side surface. A resealable opening device for paper containers. The resealable opening device for a paper container according to claim 1, wherein the holding portion is a rectangular plate and a pair of opposing sides are fixed to side surfaces of the paper container. Resealable opening device. The resealable opening device for a paper container according to claim 1 or 2, wherein the unsealing part is formed on the paper substrate with a perforation. The resealable opening device for a paper container according to claim 3, wherein the opening portion is formed in a U-shape.