JP5482452B2 - High barrier paper container - Google Patents

Description

  The present invention relates to a paper container sold in a state where confectionery or the like is stored. More specifically, the present invention relates to a paper container having a high barrier property, which is suitable when the contents do not like moisture.

Displaying and selling confectionery in a paper box has been conventionally performed. When the contents stored in the paper box are those that dislike moisture, such as chocolate and cookies, the individual cholates, cookies, and the like are individually stored in a bag and stored in the paper box.
Such a packaging form can be said to be excessive packaging in a sense, and leads to problems such as unsealment, waste of resources, and increase in garbage.

  In addition, the following can be raised as a prior art about the paper container which raised the barrier property with respect to moisture and oxygen.

JP-A-9-48426 Japanese Patent Laid-Open No. 11-20821 JP 2003-2324 A

  The present invention provides a paper container having a high barrier property in order to solve the problems such as excessive packaging described above, trouble of opening, waste of resources, and an increase in garbage, and the contents are in contact with outside air such as moisture and oxygen. Even when contact is disliked, the contents can be stored directly in a paper box without being individually wrapped.

  The present invention has been developed to effectively solve the above problems, and provides a paper box having the following features.

  The paper box of the present invention has a hexahedron shape assembled from one blank composed of a laminate including a paper layer on the outer surface side and an aluminum layer on the inner surface side between the outer layer and the inner surface. I'm doing it. All the eight corner portions of the hexahedron are located inward of the peripheral edge of the blank.

(A) Blanks are “front inner flaps and front outer flaps that are stacked on top of each other to form the front wall of the paper box”, “top walls connected to the front outer flaps via folding lines” and “front inner flaps” "Bottom wall continuously provided via a crease" and "back wall provided continuously to the top wall and the bottom wall via a crease".

(A) The front outer flap is formed with a region sandwiched between two opening half-cut lines as “opening knobs”, and each of the two opening half-cut lines is located on the front outer side. It extends from the edge of the flap to a crease that connects the top and back walls.

(C) Two first peeling half-cut lines are formed on the front inner flap at positions corresponding to the two opening half-cuts formed on the front outer flap.
Then, “a re-seal slit that can be inserted through the opening knob” and “a second half-cut line for separation at least one side of the re-seal slit along both sides” It extends across the half-cut line.
In a region sandwiched between the two first peeling half-cut lines, a peeling layer is provided in a region excluding the reseal slit.

(D) The “reseal slit” is configured to include an uncut continuous portion in the middle of a full cut portion that penetrates the blank.
"Opening half-cut line", "First peeling half-cut line", and "Second peeling half-cut line" cut the seal layer and paper layer on the outer surface without penetrating the blank, respectively. It is configured.

  In the paper box of the present invention having the above configuration, as described below, a very high sealing performance is realized.

The blank constituting the paper box includes an aluminum layer in the laminated structure, and this aluminum layer functions as a barrier against moisture and the like.
The “opening half-cut line”, “first peeling half-cut line”, and “second peeling half-cut line” formed on the paper box all extend to the aluminum layer without penetrating the entire thickness of the blank. Since it is formed with a half-cut that does not reach, the barrier property of the aluminum layer is not impaired.
The only “reseal slit” consists of a full cut that penetrates the entire thickness of the blank, but this part is sealed with a seal layer when assembling the box, so that the sealing performance is not impaired. .

The opening operation of the paper box is performed by picking the “opening knob” formed on the front outer flap. At this time, the “first peeling half-cut line” and “ A second peeling half-cut line "is provided, and a peeling layer is provided in a region surrounded by these. Although there is a “reseal slit” in this enclosed area, the release layer is arranged so as to avoid the “reseal slit”, so the “reseal slit” is a seal by a seal layer. It is surely sealed so that the sealing performance is not impaired.
In addition, since the “reseal slit” is configured to include an uncut continuous portion in the middle of the full cut portion that penetrates the blank, the slit is inadvertently opened and sealing is impaired. This situation is very difficult to occur.

  In addition, since all the eight corner portions of the hexahedron paper box are located inward from the peripheral edge of the blank, there is no gap (opening) in all the corner portions, and thus high sealing is achieved. Can be realized.

The perspective view which shows the paper box of 1st Embodiment of this invention in the state before opening. The perspective view which shows the state which opened the paper box of FIG. The expansion plan of the blank which comprises a paper box. The figure which shows the correspondence of the corner part of a paper box, and the position on a blank. The figure explaining the laminated structure of the blank which comprises a paper box. The figure explaining 2nd Embodiment. This corresponds to the enlarged view in FIG. The figure explaining 3rd Embodiment.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows a paper box 10 according to the first embodiment. This paper box 10 is assembled from one blank 1 shown in FIG. FIG. 1 shows the paper box 10 in an unopened state, and FIG. 2 shows the opened state.

  In the present invention, various configurations described below are adopted in order to improve the sealing performance of the paper box assembled from one blank.

<< The corners of the paper box 10 are all located inward of the peripheral edge of the blank 1 >>
FIG. 4 shows a correspondence relationship between the unfolded blank 1 and a paper box 10 formed by assembling the blank 1. The paper box 10 is a hexahedron and has a total of eight corner portions A to H. On the blank 1, all the locations A to H corresponding to these corner portions are not on the peripheral edge of the blank 1, but are located on the inner side.
As a result of adopting such a configuration, in the paper box 10 after assembly, no gaps (openings) are generated in all the corner portions A to H, and therefore high sealing performance can be realized.
In addition, the concrete folding method (arrangement of creases) of the blank 1 is not limited to the illustrated one.

<< Configuration of Blank 1 >>
FIG. 3 shows a developed view of the blank 1 constituting the paper box 10, and the paper box 10 shown in FIGS. In the present invention, the blank 1 includes at least the following elements.
(1) Front outer flap 11a and front inner flap 11b constituting the front wall 11.
The front wall 11 in the assembled paper box 10 is configured by laminating the front outer flap 11a on the outer surface of the front inner flap 11b.
(2) Top wall 12.
The top wall 12 is connected to the front outer flap 11a via a crease a.
(3) The bottom wall 14.
The bottom wall 14 is connected to the front inner flap 11b via a crease d.
(4) Back wall 13.
The rear wall 13 faces the front wall 11 in the assembled paper box 10 and is connected to the top wall 12 via the crease b and to the bottom wall 14 via the crease c.
(5) Since the paper box 10 is a hexahedron, left and right side walls exist in addition to the above wall portions. In the illustrated example, the left and right side walls are sealed and bonded so as to fold corresponding portions of the blank 1, thereby forming a sealed hexahedron. The specific folding method is not limited to the illustrated one.

«Opening half-cut wires 22a and 22b and opening knob 25»
The front outer flap 11a is formed with two notches 21a and 21b spaced along the edge. Opening half-cut lines 22a and 22b extend from the notches 21a and 21b, respectively. The opening half-cut lines 22a and 22b initially extend in parallel to each other, extend in a direction away from the middle, and further extend in parallel on the top wall 12 to reach the crease b (see FIG. 3).
On the front outer flap 11a, a region between the two notches 21a and 21b (a region sandwiched between parallel portions of the opening half-cut lines 22a and 22b) functions as the opening knob 25. That is, the consumer can pick up the opening knob 25 and tear the paper box 10 upward along the opening half-cut lines 22a and 22b. In addition, after opening, the paper box 10 can be resealed by inserting the opening knob 25 into a reseal slit 31 described later (see FIG. 2).
The opening half-cut lines 22a and 22b are formed by cutting the seal layer 5 and the paper layer 6 on the outer surface without penetrating the blank 1 (see FIG. 5). In the example shown in FIG. 5, the half cut penetrates the paper layer 6, but it may be a half cut halfway through the paper layer 6.

  On the front inner flap 11b, as partially enlarged and shown in FIG. 3, "reseal slit 31", "first peeling half-cut lines 32a and 32b", "second peeling half-cut" Lines 35a-c "are formed. These will be described.

≪Re-seal slit 31≫
The reseal slit 31 enables the sealed paper box 10 to be sealed again, and is formed through the entire thickness of the blank 1 by the full-cut portion shown in FIG. As shown in an enlarged manner in FIG. 3, the reseal slit 31 includes an uncut continuous portion 31 ′ in the middle of the full cut portion.
The continuous portion 31 ′ is provided to prevent the reseal slit 31 from being carelessly broken. In the illustrated example, the continuous portions 31 ′ are provided in two places, but an appropriate number can be set.

<< First peeling half-cut wires 32a, 32b >>
Two opening half-cuts 22a and 22b are formed on the front outer flap 11a, but two first peeling half-cut lines 32a and 32b are formed at positions corresponding to the two on the front inner flap 11b. Forming.
These first peeling half-cut lines 32a and 32b make it easier to peel off the front outer flap 11a from the front inner flap 11b during the opening operation of the paper box 10, as with the second peeling half-cut lines 35a to 35c described later. It is provided for.

«Second peeling half-cut wire 35a-c»
The second peeling half-cut lines 35a to 35c are formed along the reseal slit 31 at least one on each side. In the example shown in FIG. 3, one second peeling half-cut line 35 a to 35 c is provided above the reseal slit 31 and two below the reseal slit 31, but at least 1 above and below the reseal slit 31. Other configurations may be used as long as they exist.
The second peeling half-cut lines 35a to 35c are provided to facilitate the peeling of the front outer flap 11a from the front inner flap 11b when the paper box 10 is opened.
The presence of the plurality of second peeling half-cut lines 35a to 35c has the meaning of absorbing the positional deviation as in the case of the second embodiment described later. Details will be described later.

<< Peeling layer 50 >>
In the front inner flap 11b shown partially enlarged in FIG. 3, the resealing slit 31 and the second peeling half-cut lines 35a to 35c extending in the horizontal direction all extend in the vertical direction. It extends across both of the first peeling half-cut lines 32a and 32b.
A peeling layer 50 is provided in a region sandwiched between two first peeling half-cut lines 32a and 32b extending in the vertical direction on both sides except for the portion of the reseal slit 31. A region 50 shown in gray on the front inner flap 11b is a region where the release layer is disposed.
Regarding the spread in the horizontal direction, in the drawing, the peeling layer 50 extends to the left and right sides beyond the first peeling half-cut lines 32a and 32b, but at least to the first peeling half-cut lines 32a and 32b. It is sufficient if the release layer 50 exists in the sandwiched area.
Regarding the spread in the vertical direction, it is sufficient to avoid the reseal slit 31 and cover the second peeling half-cut lines 35a to 35c.

  The peeling layer 50 is a region surrounded by the first peeling half-cut lines 32a and 32b and the second peeling half-cut lines 35a to 35c in order to ensure the sealing performance of the paper box 10 and facilitate the opening operation. Is provided.

≪Laminated structure, half cut, full cut (Fig. 5) ≫
The laminated structure of the blank 1 is as follows. That is, as schematically shown in FIG. 5, the seal layers 5 and 8 are positioned on the outer surface and the inner surface of the blank 1, respectively. A paper layer 6 on the outer surface side and an aluminum layer 7 on the inner surface side are formed between the seal layers 5 and 8. When the paper box 10 is assembled, the seal layer 5 comes to the outside of the box and the seal layer 8 comes to the inside of the box.
Other layers may be included in the laminated structure as long as the seal layer is present on the outermost side and the inner side, and the aluminum layer is present on the inner side rather than the paper layer between the two seal layers.

The aluminum layer 7 gives the paper box 10 barrier properties against moisture, oxygen, etc. Therefore, it is preferable that the aluminum layer 7 is not cut. Therefore, the “half-cut lines 22a, 22b for opening”, “half-cut lines 32a, 32b for first peeling”, and “half-cut lines 35a-c for second peeling” are all the half-cuts shown in FIG. Like the portion, the seal layer 5 and the paper layer 6 on the outer surface are cut out without penetrating the blank (not reaching the aluminum layer 7 that provides barrier properties). In the illustrated example, the half cut penetrates the paper layer 6, but it may be a half cut halfway through the paper layer 6.
Only the reseal slit 31 is configured as a full cut portion (see FIG. 5) that penetrates the entire thickness of the blank 1. However, when the paper box 10 is assembled, the peripheral area of the reseal slit 1 is closed with a seal by the seal layers 5 and 8, so that the sealing performance is not impaired. Further, by providing an uncut continuous portion 31 ′ in the middle of the full cut portion constituting the reseal slit 31, the slit is prevented from being opened carelessly.

The opening operation of the paper box 10 is performed by picking the opening knob 25 formed on the front outer flap 11a. At this time, in order to easily peel the front outer flap 11a from the front inner flap 11b, the "half-cut for first peeling" is performed. Lines 32a and 32b "and" second peeling half-cut lines 35a to 35c "are provided, and a peeling layer 50 is provided in a region surrounded by these. Although the reseal slit 31 exists in the enclosed region, the release layer 50 is disposed so as to avoid the reseal slit 31, and therefore the reseal slit 31 is sealed by the seal layers 5 and 8. It is surely sealed so that the sealing performance is not impaired.
In addition, since the reseal slit 31 is configured to include an uncut continuous portion 31 ′ in the middle of the full cut portion that penetrates the blank 1, the slit is inadvertently opened and sealing is impaired. It becomes very difficult to happen.

<< Second Embodiment (FIG. 6) >>
The paper box of the second embodiment is different from the first embodiment described above only in the configuration of the first peeling half-cut lines 32a and 32b, and only this point will be described.
In the first embodiment, two first peeling half-cut lines 32a and 32b are formed on both sides. In the second embodiment, at least one adjacent first peeling half-cut line 32a ′, 32b ′ is formed for each of the half-cut lines 32a, 32b.

As described above, the meaning of providing a plurality of first peeling half-cut lines on each of the left and right sides is absorption of displacement. That is, in the production line, when the release layer 50 is applied onto the front inner flap 11b, the release layer 50 should naturally be arranged so as to cover both the first release half-cut lines 32a and 32b. .
However, in reality, there may be a deviation in the manufacturing process. As in the second embodiment shown in FIG. 6, the presence of the first peeling half-cut lines on each of the left and right sides absorbs this shift, and the occurrence rate of defective products can be kept low. .
In the first embodiment described above, the provision of a plurality of second peeling half-cut lines 35a to 35c has the same meaning.

In the example shown in FIG. 6, the first peeling half-cut lines are two on each side (total of four lines), but more half-cut lines may be provided.
The reseal slit 31 and the second peeling half-cut lines 35a to 35c are provided so as to extend across all the first peeling half-cut lines 32a, 32b, 32a ′, 32b ′,. . The release layer 50 is provided in a region sandwiched between the two outermost first release half-cut lines (32a ′ and 32b ′ in the illustrated example), avoiding the reseal slit 31.

«Third embodiment (Fig. 7)»
Since the paper box of the third embodiment is different from the first and second embodiments described above only in that the extension flap 11c is provided in the blank 1, only this point will be described. FIG. 7 shows the correspondence between the blank 1 ′ and the paper box 10 ′.
In the blank 1 ′, an extension flap 11c is additionally formed above the front inner flap 11b. Both are connected via a crease f. The crease f and the extension flap 11c are at the positions shown in the partially cutaway view of FIG. 7 in the assembled paper box 10 ′. That is, the extension flap 11c is folded back in the outward direction of the box at the crease f.

The laminated structure of the blanks 1 and 1 ′ is as described with reference to FIG. 5, but the paper layer 6 is exposed at the peripheral edge of the blank. If, for example, chocolate, cookies, or the like, which are the contents, come into contact with the exposed edge, an oil component enters the paper layer 6 and adverse effects such as appearing on the surface of the paper box appear.
In order to prevent this, in the third embodiment, the extension flap 11c is provided and folded back outwardly at the crease f. As a result, the contents do not come into contact with the end edge 11d, so that oil can be prevented from penetrating into the laminated structure from the end edge 11d.

DESCRIPTION OF SYMBOLS 1, 1 'Blank 5 Seal layer 6 Paper layer 7 Aluminum layer 8 Seal layer 10, 10' Paper box 11 Front wall 11a Front outer side flap 11b Front inner side flap 11c Extension flap 11d Edge 12 Top wall 13 Back wall 14 Bottom wall 21a, 21b Notch 22a, 22b Opening half cut 25 Opening knob 31 Re-sealing slit 31 'Continuous portions 32a, 32b, 32a', 32b 'First peeling half-cut lines 35a, 35, 35c For second peeling Half-cut line 50 Release layer

Claims (3)

One blank (1) having a sealing layer (5, 8) on the outer surface and the inner surface and including a paper layer (6) on the outer surface side and an aluminum layer (7) on the inner surface side therebetween 6) a hexahedron-shaped paper box assembled from
All eight corners of the hexahedron are located inward from the peripheral edge of the blank (1),
(A) Blank (1)
A front inner flap (11b) and a front outer flap (11a) that are stacked on each other to form a front wall (11) of the paper box, and a top wall (12) that is connected to the front outer flap via a crease, A bottom wall (14) connected to the front inner flap via a crease, and a back wall (13) connected to the top wall and the bottom wall via a crease, respectively.
(I) The front outer flap (11a)
The region sandwiched between the two opening half-cut lines (22a, 22b) is formed as an opening knob (25), and each of the two opening half-cut lines (22a, 22b) Extending from the edge of the front outer flap (11a) to the crease (b) connecting the top wall (12) and the back wall (13),
(C) The front inner flap (11b)
Two first cut half-cut lines (32a, 32b) are formed at positions corresponding to the two open half-cuts (22a, 22b) formed on the front outer flap,
A resealing slit (31) that can be inserted through the opening knob (25), and at least one second peeling half-cut line (35a-c) on each side along the resealing slit (31). Extending across the two first peeling half-cut lines (32a, 32b),
In a region sandwiched between two first peeling half-cut lines (32a, 32b), a peeling layer (50) is provided in a region excluding the reseal slit (31),
(D) The reseal slit (31) is configured to include an uncut continuous portion (31 ′) in the middle of the full cut portion penetrating the blank,
The opening half-cut lines (22a, 22b), the first peeling half-cut lines (32a, 32b), and the second peeling half-cut lines (35a-c) do not penetrate the blank (1), respectively. A paper box characterized by being cut from the sealing layer (5) on the outer surface to the middle of the paper layer (6). For each of the two first peeling half-cut lines (32a, 32b), at least one adjacent first peeling half-cut line (32a ', 32b') is formed,
The reseal slit (31) and the second peeling half-cut lines (35a to 35c) extend across all the first peeling half-cut lines (32a, 32b, 32a ′, 32b ′). And
The said peeling layer (50) is provided in the area | region except the reseal slit (31) in the area | region pinched | interposed into the outermost two 1st peeling half cut lines (32a ', 32b'). The paper box according to claim 1, wherein:   An extension flap (11c) connected to the edge of the front inner flap (11b) via a crease (f) is further provided, and the extension flap (11c) is a box inside the paper box. The paper box according to claim 1 or 2, wherein the paper box is folded in an outward direction.

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