JP3841935B2 - Bag in carton - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flip top type bag in carton that facilitates opening and resealing an inner bag.
[0002]
[Prior art]
Bag in carton equipped with a cover (hereinafter referred to as a flip top) that has been rotated by a hinge has been used to dispense powder, granule, flake and other contents that dislike moisture absorption and oxygen permeation. Has been. In this case, the bag-in-carton is a so-called case in which the inner bag film original is cylinder-bonded, the tubular body folded into a flat shape is cut into an appropriate length, and bonded to the inner surface of the carton at the time of carton sack application. Lined carton. The feature of this lined carton is that when the carton is molded, the inner bag also expands to the full volume of the carton, so it is easy to fill the contents, and it is necessary if the upper and lower ends of the inner bag are sealed and folded into a square shape The object is to enable a compact packaging body with no packaging material and no useless space.
FIG. 3 is an explanatory view of opening and resealing of the conventional flip top bag in carton 30.
When the front plate of the cover lid is lifted upward, the connecting piece folded into the cover lid is cut and opened as shown in FIG. The height of the front plate, rear plate, and both side plates of the trunk in the opened state is the same.
Next, an upper end portion of the folded inner bag is raised, and a so-called ear portion which is one end of the top seal is cut off with a scissors to form an opening M, and a necessary amount of contents can be taken out therefrom. To re-seal, return to the state of FIG. 3 (b) and then fold both ears in the order of numbers in FIG. 3 (c), then fold the top seal part forward and finally fold down the cover lid. The upper part of the inner bag is sealed.
[0003]
[Problems to be solved by the invention]
However, in the above-described flip-top type bag-in carton, the size of the inner bag that protrudes outward from the upper and lower sides of the carton body portion is kept to the minimum necessary for molding so that the waste of the inner bag is reduced. There is a problem that opening and resealing the inner bag by the above procedure is extremely difficult. This problem can be solved if the size of the head of the bag-in carton is larger than that of the inner bag carton. However, since the inner bag is made of expensive packaging material such as aluminum foil, the packaging material cost is high. In addition, a carton space for storing an extra inner bag is also required, resulting in a problem that the original compactness of the bag-in carton is lost.
On the other hand, there is a problem that even if the content volume decreases during use, the volume of the package does not change and the inner bag cannot be folded small.
The present invention has been made in view of this problem, and an object of the present invention is to provide an easy-to-handle bag in carton that has good openability and resealability with a packaging material that does not exceed the conventional use amount. And
[0004]
[Means for Solving the Problems]
In order to solve the above problems, in the present invention, a trunk front plate, a trunk side plate, a trunk rear plate, a trunk side plate are sequentially connected via a folding line, and an upper portion of the trunk portion. A cover lid that covers the body front plate and a part of the body side plate, a carton having a bottom part that closes a lower part of the body part, and an inner bag affixed to the inside of the carton. In the bag in carton provided, the trunk is provided such that the upper side of the trunk front plate and a part of the upper side of the trunk side plate near the trunk front plate are lower than the upper side of the trunk rear plate , the portion of the body portion rear plate side of the upper side of the body plate is provided at the same level as the upper side of the barrel after plate, said Kabusebuta the lid which is connected via a fold line to the plate after the barrel A lid front plate connected via a folded piece folded back between the body top plate and the body front plate, and the lid A lid side plate that is connected to a front plate and connected via a connecting piece that is folded back to a portion of the trunk side plate that is closer to the front of the trunk portion. 1 weakening line is formed, a second weakening line is formed at a connecting portion between the connecting piece and the body side plate, and the folding line connecting the cover lid to the lid top plate is used as a hinge portion. When rotating, the first weakening line and the second weakening line can be cut and opened, and the upper part of the trunk front plate and a part of the upper part of the trunk side plate are connected to the trunk part. It is provided below the upper side of the rear plate, has a crooked shape, covers the upper side portion of the trunk side plate that is not curled, covers the same level as the upper side of the trunk rear plate as a lid support side, Once molded, it is inscribed on the back of the top of the cover and received from below, And characterized in that it acts to increase the buckling strength of the emissions. Moreover, the said trunk | drum can also be divided | segmented by cut | disconnecting the zipper which goes around the said trunk | drum provided in the said carton in a substantially horizontal direction. Further, the zipper can be formed by arranging a plurality of Y-shaped cuts in parallel.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail with reference to the drawings.
FIG. 1 is a development view of a carton blank of a bag-in carton according to the present invention. As shown in FIG. 1, a bag-in-carton carton blank 10 according to the present invention has a quadrangular columnar body and a flip-top cover that are integrally formed.
The trunk portion is formed by connecting a trunk portion side plate 11, a trunk portion front plate 12, a trunk portion side plate 13, a trunk portion rear plate 14, and a glue margin 15 in this order in a row through folding lines a to d. The lid top plate 2 is connected to the upper side of the plate 14 via a fold line h serving as a hinge.
The cover lid portion other than the lid top plate 2 includes a lid front plate 1, two lid side plates 3, and folded pieces 6 and 7 connected to each of them via a fold line g. These are referred to as a cover lid.
A connecting portion Z having a predetermined width is interposed between the trunk portion and the cover lid portion. This portion is Z-shaped by a fold line e, a fold line f and a weakening line j between the lower part of the lid part front plate 1 and the lid part side plate 3 and the upper part of the trunk part front plate 12 and the trunk part side plates 11 and 13. Folded.
This connecting portion Z is composed of a connecting piece connecting the cover plate and the front plate of the body portion and two connecting pieces 4 connecting the side plates, and the former is two upper and lower pieces cut at the weak line i in the middle stage. The folded pieces 5 and 8 are formed. The folding piece 5 is connected to the lid front plate 1 via a folding line e, and the folding piece 8 is connected to the trunk front plate 12 via a folding line (preferably a lead rule) f.
The connecting piece 4 is connected to the lid side plate 3 via a fold line e, and the trunk side plates 11 and 13 are connected to a part of their upper sides via a weakening line j.
The weakening lines i and j are formed of cut lines with less connection, and the covering lid can be easily opened without resistance when opening.
The carton blank of the bag-in carton according to the present invention is structurally different from the carton blank of the conventional flip-top type bag-in carton in that the upper side of the trunk front plate 12 and the upper sides of the trunk side plates 11 and 13 are different. A part thereof is provided on the upper side of the trunk rear plate 14, that is, below the level of the hinge (fold line h) around which the cover lid rotates. That is, the front plate of the trunk portion and the upper portion of the side plate are punched. And the vertical width of the trunk | drum front board 12 becomes short by the level | step difference, and the vertical width of the lid part front board 1 is large. As a result, the front and side surfaces of the upper part of the inner bag formed at the time of opening are exposed. The higher the exposure, the better the purpose of the present invention is. However, if the exposure is too large, the carton is structurally weak. Therefore, the above step needs to be determined in consideration of both sides.
Further, the upper side portions of the body side plates 11 and 13 that are not turned are covered and placed on substantially the same level as the hinge as the lid support side S. When the carton is molded, the covering lid support side S is inscribed in the back of the top of the covering lid, and acts to increase the buckling strength of the carton by receiving the covering lid from below.
The inner bag B is attached to the inner surface of the carton blank 10 at the partially bonded portion A using an adhesive that can be peeled off.
Further, the body portion is provided with two Y-shaped zippers J that circulate around the body portion so that the body portion can be divided by separating the strip O.
[0006]
In order to form the bag-in carton 20 according to the present invention from the carton blank 10 described above, first, the connecting portion Z is folded into a Z shape. That is, the carton blank 10 is folded to the front side by the fold line f and the weak line j, and then folded to the back side by the fold line e, and the back surface of the connecting piece 4 and the lid side plate 3 and the folded piece 5 and the lid front plate 1 Adhere backside comrades.
In the carton blank 10 in this state, an adhesive capable of peeling the inner bag B, which is folded flat and cut to the necessary minimum length, at the partial adhesive portion A in a positional relationship as shown by a dotted line in FIG. Use for partial adhesion. This partial adhesion is preferably temporarily attached to such a degree that it can be easily peeled off by pulling the inner bag B by hand. This is because the workability is better when the inner bag B is separated from the inner surface of the carton at the time of opening and resealing, and the final disposal of the inner bag B and the carton is facilitated.
In order to perform this weakly peelable bond, the adhesive layer is selected so that the adhesive layer is likely to cause shear peeling, or is bonded with a strong adhesive with the adhesive area of the partial adhesive portion A being reduced, or the portion on the back side of the paperboard The adhesive portion A may be cut in advance in a mesh shape, or the paper board may be delaminated by surrounding the periphery with a circular half cut.
Next, the entire carton blank is folded in three at the folding lines a and c, and the body side plate 11 and the glue margin 15 are glued.
The bag-in-carton 20 folded in a flat manner thus obtained is supplied to a molding and filling machine, and the carton is first raised in a prismatic shape, and at the same time, the upper part of the inner bag B raised in the prismatic shape is heat-sealed. Fold and then fold the carton folded pieces 6 and 7 onto the lid top plate 2 to form the top cover, reverse the top and bottom, fill the contents from the bottom, and heat the bottom of the inner bag in the same way The bag-in carton 20 according to the present invention as shown in FIG. 2 (a) is finished by sealing and folding, folding the bottom folded pieces 16-19 of the bottom of the carton, and pasting them with glue.
Note that the above molding order may be reversed.
[0007]
FIG. 2 is an explanatory view of opening and resealing the bag-in carton 20 according to the present invention.
FIG. 2A is a perspective view of the bag-in carton 20 according to the present invention, in which the front plate 1 and the side plate 3 of the lid portion are deeper than those of the conventional one.
When the lid front plate 1 is lifted upward as indicated by the arrow, the weakening lines i and j provided on the connecting portion Z are easily broken, and the covering lid can be opened with little resistance.
FIG. 2 (b) is an explanatory view of a method for opening and resealing the bag in carton 20 according to the present invention, as shown in FIG. 2 (b) showing the upper part of the folded inner bag after opening the cover lid. If it is stretched and cut along the top seal, the upper part of the bag-in carton can be opened greatly. This cutting method may be torn horizontally by hand using a scar formed from the outside along the crease of the cutting start without using a tool such as a scissors. In this case, if a laterally uniaxially stretched film is used as the base material of the inner bag, the cutting is performed more smoothly.
As described above, the degree of exposure of the upper part of the inner bag in a state where the cover lid is opened is larger than that of the conventional one, and the body rear plate 14 and the inner bag B are easily peeled off. As a result, the upper part of the container becomes independent, and the degree of freedom of the next resealing is increased as well as the opening, and the workability is greatly improved.
For re-sealing, from the state shown in FIG. 2 (b), the upper part of the inner bag may be folded forward and both ears may be folded inward, or both sides of the inner bag may be gusset folded. From above, the upper part may be folded.
Finally, when the cover lid is tilted to the front surface, the folded piece 8 is locked on the back surface of the cover lid by being hooked on the edge of the folded piece 5 that is folded and adhered to the rear surface of the lid front plate 1. Even if the inner bag that is caught tries to return with a repulsive force, it can be pressed down.
In addition, when the remaining amount of the contents has decreased, cut the strip O with the Y-shaped zipper J, divide the body part horizontally, remove the upper part of the carton, and further wrap the inner bag B, You may make it accommodate in the part which is divided | segmented and remains.
Finally, the last carton is also separated from the inner bag B so that it can be easily separated and discarded.
[0008]
【Example】
In order to use the bag-in carton 20 according to the present invention as a package for skim milk powder, a sample of an example was made with the following specifications.
Paperboard: Manila ball 345 g / m ²
Outer box dimensions: Height 145mm, width 115mm, depth 55mm (body)
Step difference between the front plate and the back plate: 20mm
Inner bag dimensions: Length 235mm, fold diameter 162mm
Laminated structure of inner bag: OPP20 / PE15 / AL7 / PE30
Here, the OPP stretched polypropylene PE polyethylene AL aluminum foil numbers are the thickness of each layer, and the unit is μm.
This example sample was filled with 250 g of nonfat dry milk, and as a result of a comparative test using a molded product and a conventional product as a comparative example, the opening and resealing of the inner bag had a degree of freedom compared to the conventional product. The workability improved, and it was easy for elderly people to open and reseal.
Further, since a part of the upper part of the body side plates 11 and 13 is left without being scraped off, the product can be accumulated and handled as before without reducing the buckling strength of the bag-in carton 20.
In the latter half of the use of the example sample, it is possible to tear the strip O to remove the upper part of the trunk and fold the inner bag small, and to tear the strip O with the Y-shaped zipper J, Compared with the mold zipper, it was extremely stable, and there was no trouble that the strip O was cut off in the middle.
[0009]
【The invention's effect】
According to the present invention, the upper part of the trunk front plate 12 and the trunk side plates 11, 13 of the carton of the bag-in-carton is partially scraped, and the inner bag and the outer box are detachably bonded, so that when opened, The degree of exposure of the upper part of the inner bag can be increased, and an easy-to-use flip-top bag in carton can be provided that has a very good openability and resealability while being a package having the same specifications as the conventional one.
Even if the trunk side plates 11 and 13 are scraped, a part of the trunk side plate 14 is maintained at the level of the trunk rear plate 14, so that the buckling strength of the molded carton does not drop greatly.
Furthermore, by splitting the body part by tearing a strip with a Y-shaped zipper, the inner bag can be folded even smaller when the content of the contents is reduced, making the entire package compact It is.
[Brief description of the drawings]
FIG. 1 is a developed view of a carton blank of a bag-in carton according to the present invention. FIG. 2 is an explanatory view of opening and resealing the bag-in carton according to the present invention.
FIG. 3 is an explanatory view of opening and resealing a conventional flip top bag in carton.
DESCRIPTION OF SYMBOLS 1 Lid front plate 2 Lid top plate 3 Lid side plate 4 Connecting piece 5 Folding piece 6, 7 Lid turning piece 8 Folding piece 10 Bag-in-carton carton blank 11 Trunk side plate 12 Trunk front plate 13 according to the present invention Body side plate 14 Body rear plate 15 Paste 16-19 Bottom folded piece 20 Bag in carton 30 according to the present invention Conventional flip top bag in carton a to h Folding line i First weakening line j Second weakening line A Temporary Bonding part B Inner bag J Y-shaped zipper M Opening part O Strip piece S Covering cover support side Z Connection part

Claims (4)

  A trunk part formed by sequentially connecting a trunk front plate, a trunk side plate, a trunk rear plate, and a trunk side plate via a fold line, and an upper part of the trunk part. A bag-in carton comprising a covering lid that covers a part of a part side plate, a carton having a bottom part that closes a lower part of the body part, and an inner bag affixed to the inside of the carton, A portion of the upper side of the trunk front plate and a portion of the upper side of the trunk side plate closer to the trunk front plate is lower than the upper side of the trunk rear plate, and the barrel on the upper side of the trunk side plate A portion near the rear plate is provided at the same level as the upper side of the trunk rear plate, and the cover lid is connected to the trunk rear plate via a folding line; and the trunk plate A lid front plate connected via a folded piece folded between the lid side front plate and the lid side plate connected to the lid front plate A lid side plate connected via a connecting piece folded back with a portion near the recording body front plate, forming a first weakening line across the entire width of the folded piece, and connecting the connecting piece A second weakening line is formed at a connecting portion between the piece and the body side plate, and the first weakening line is rotated when the folding line connecting the cover lid to the lid top plate is rotated as a hinge portion. And the second weakening line can be cut and opened, and the upper side of the trunk front plate and a part of the upper side of the trunk side plate are provided below the upper side of the trunk rear plate, The upper side of the trunk side plate is not covered and the upper side of the trunk rear plate is set to the same level as the upper side of the trunk rear plate. Is inscribed in from the bottom and acts to increase the buckling strength of the carton. Bag-in-carton, wherein the door.   The bag-in carton according to claim 1, wherein the carton includes a zipper that makes a round in a substantially horizontal direction of the body part, and the body part is divided by separating the zipper. The bag in carton according to claim 2 , wherein the zipper is formed by arranging a plurality of Y-shaped cuts in parallel.   4. The bag-in carton according to claim 2, wherein the inner bag is affixed excluding the zipper portion of the carton.

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