JP2537825Y2 - Sealed paper carton - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a sealed paper carton made of paperboard such as processed paper.

[Related Art] Conventionally, paper cartons represented by folding boxes have been widely used as individual packaging containers for selling long raw confectioneries such as castella and cakes to consumers. In addition, individual confections such as individual cakes and oil confections are generally arranged on trays and sold together with the trays in cartons as described above at retail stores.

[Issues to be solved by the invention] By the way, recently, confectionery manufactured at a confectionery factory is packed directly in a carton at the factory, distributed with the carton, and sold directly at retail stores such as supermarkets and convenience stores. However, the conventional carton as described above has a problem that the preservation period is limited to a very short time due to lack of hermeticity. In addition, the tray on which the confectionery is placed is sealed with a film and put in a carton, or the carton is wrapped in a sealed state to extend the storage period. There is a problem that the packaging operation and the opening operation are troublesome.

The present invention has been made in view of the above-described problems, and has as its object to provide a sealed paper carton that is excellent in sealing performance and that can easily and reliably perform an opening operation.

Means for Solving the Problems In order to achieve the above object, the present invention provides a rectangular top surface by bending a blank plate having fold lines parallel to each other, winding the blank plate at each fold line, and bonding both ends. panel,
The vertical cross-sectional shape of the lower panel and the pair of side panels constitutes a rectangular body, and a rectangular lid panel is connected to both ends of the upper panel and the lower panel, respectively. Rib panels are connected to each other, and right and left isosceles triangular folded panels are respectively provided at both ends of each of the side panels on the bottom side thereof, and the lid panel adjacent to each oblique side of each of the folded panels is provided. A pair of small isosceles triangular small folding panels, each of which is provided on one side of the small folding panel, is connected to the side opposite to the right angle, and is adjacent to the other side of the small folding panel. Small rib panels connected to the respective rib panels are connected to each other, and each of the folding panels is bent outwardly while each of the lid panels is bent inwardly. A panel and each of the small folding panels adjacent thereto are overlapped to form a triangular overlap portion, and the inner surfaces of the opposing rib panels and the inner surfaces of the small rib panels are bonded to each other to form a linear overlap portion, Sealing that is formed by folding the straight overlapping portion, folding each of the triangular overlapping portions toward the side panel or the lid panel, and bonding them to these surfaces to form side closing portions on both sides of the body, respectively. In paper carton,
The blank plate is made of a wrapping material mainly composed of a paper layer, and a band-shaped synthetic resin film having tearability in the length direction is formed in a state in which the start and end coincide with each other when the blank plate is wound. It is characterized in that it is provided with a grip portion which is laminated on the inner side, and which protrudes a portion extending over two regions of a band-shaped region where the synthetic resin film is laminated and a region where only the packaging material is provided.

Further, in order to make the contents visible from the outside of the carton, a mode may be adopted in which a window hole is formed in the upper panel and a transparent film member for closing the window hole is provided.

[Operation] The sealed paper carton having the above configuration is formed by assembling a blank plate with no gap, and is formed in a form that is shielded from the outside air.

In addition, a strip-shaped synthetic resin film having tearability in the length direction is provided on the blank plate, and a portion extending over two regions of a band-shaped region where the synthetic resin film is laminated and a region of only the packaging material is projected. By providing the gripping portion, when the gripping portion is pinched and pulled, the opening is performed straight so that the side edge of the synthetic resin film defines one side edge of the unsealing portion.

[Example] Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of one embodiment of a sealed paper carton according to the present invention. A sealed paper carton C shown in FIG. 1 is formed by cutting a blank plate B shown in FIG. a,
The body 1 is bent at b, c, d and wound, and its both ends are attached to each other to form a body 1 having a rectangular vertical cross-section. It is created by forming the parts 2 and 3.

As shown in FIG. 2, the blank plate B is composed of upper panel portions P1 and lower panel portions P1 by mountain fold lines a, b, c, d parallel to each other.
2. It is largely divided into an adhesive flap portion F and horizontal panel portions P3 and P4 located therebetween.

The upper panel portion P1 is composed of a rectangular upper panel 11, rectangular lid panels 12, 12, and rib panels 13, 13, and each lid panel 12 is provided at both ends of the upper panel 11 via mountain fold lines e, f. The rib panels 13, 13 are connected to the lid panels 12, 12 via valley fold lines g, h, respectively. On the side of the upper panel 11 opposite to the mountain fold line a, grips 14 used for opening are provided, and notches 15, 15 are formed on both sides of the grips 14.

The lower panel portion P2 includes a rectangular lower panel 21, rectangular lid panels 22, 22, and rib panels 23, 23.Each lid panel 22 is provided at both ends of the lower panel 21 via mountain fold lines i, j. The rib panels 23 are connected to the lid panels 22 and 22 via the valley fold lines k and l, respectively.

The horizontal panel portion P3 has a rectangular side panel 31 as a center, a right-angled isosceles triangular folded panel 32, a right-angled isosceles triangular pair of small folded panels 33, and a pair of small rib panels.
34 are provided at both ends thereof. Each of the fold panels 32 has its bottom side through the valley fold lines m and n to the side panel 3.
A pair of small folding panels 33 and a pair of small rib panels 34 are connected to each folding panel 32 in a symmetric manner in the same manner. In other words, the upper part in the drawing will be described. A pair of small folding panels 33 are respectively provided on the oblique sides of the folding panel 32 via the mountain fold lines o and p on the sides facing the right angle, and on one side of the right angle. Are connected to the lid panels 12 and 22 via the mountain fold lines a and b, respectively.Furthermore, each small rib panel 34 has a valley fold line q on the other side of the small fold panel 33 across the right angle. , r respectively. The small rib panels 34 are connected to each other by a mountain fold line s, and are connected to the rib panels 13 and 23 via the mountain fold lines a and b, respectively.

Like the horizontal panel portion P3, the horizontal panel portion P4 has a rectangular side panel 41 as a center, a right-angled isosceles triangular folded panel 42, and a pair of right-angled isosceles triangular small folded panels.
43 and a pair of small rib panels 44 at both ends thereof. And each fold panel 42 has a valley fold line t,
The bottom side is connected to both ends of the side panel 41 via u, and each of the folding panels 42 has a pair of small folding panels 43 and a pair of small rib panels similarly to the horizontal panel portion P3. 44 are symmetrically connected in the same manner.

The adhesive flap portion F is composed of an elongated central flap 51, lid flaps 52, 52, and rib flaps 53, 53. Each lid flap 52 is provided at each end of the central flap 51 via a mountain fold line e ', f'. The rib flaps 53 are connected to the lid flaps 52 via valley fold lines g 'and h', respectively.

On the other hand, as shown in the sectional view of FIG. 3 (a), the blank plate B has a thickness of 20
μ heat-fused resin layer 61 made of polyethylene, paper layer 62, adhesive layer 63 made of polyethylene having a thickness of 20μ, thickness of 7-9μ
And an adhesive layer 65 made of 20 μm thick polyethylene, and a packaging material 60 made up of a heat-fused resin layer 66 made of 40 μm thick polyethylene. In the embodiment shown in FIG. 2, a strip-shaped synthetic resin film 67 having tearability in the length direction (the direction of the arrow in FIG. 2).
Are laminated between the adhesive layer 65 and the heat-fusible resin layer 66 at the positions indicated by the dotted lines in FIG. 2 as shown in the sectional view of FIG. 3B.

Further, in the blank plate B shown in FIG.
The grip portion 14 is formed at one end of the protrusion 11 so as to project with a width smaller than the width of the synthetic resin film 67. Therefore, this gripping portion 14 is a packaging material 60 including a synthetic resin film 67.
Has been extended.

The strip-shaped synthetic resin film 67 having tearability in the length direction is a uniaxially stretched thermoplastic synthetic resin film, or a biaxially stretched thermoplastic synthetic resin film having extremely large orientation in the other direction as compared with one direction. And the like, and is preferably mainly composed of a polyolefin-based film such as polyethylene or polypropylene, and its thickness is appropriately determined to such an extent that it can be torn by hand.

Further, in the packaging material 60, as the barrier layer 64, in addition to the aluminum foil, a material composed of a polyvinylidene chloride film, a polyvinylidene chloride coated polyester film, an ethylene / vinyl alcohol copolymer resin film, or the like is generally used. Used for In addition, the heat-sealing resin layer 6
For the layers 1, 66 and the adhesive layers 63, 65, synthetic resins such as ionomers and polypropylene may be used in addition to polyethylene.

In order to assemble the sealed paper carton C shown in FIG. 1 from the blank plate B shown in FIG. 2, first, an upper panel portion P1, a lower panel portion P2, an adhesive flap portion F and a horizontal panel portion P3 located therebetween. , P4 are folded at the mountain fold lines a, b, c, d, and the central flap 51 and the lid flaps 52, 52 of the adhesive flap portion F
Then, the rib flaps 53, 53 are bonded to the inner surface of the end of the upper panel portion P1. At this time, the mountain fold lines e and e ', f and f', the valley fold lines g and g ', and h and h' are overlapped at the bonding portion of both. After the body 1 having a rectangular cross section is formed in this way, the contents are stored in the body 1, and then the side closing parts 2, 3 shown in FIG. Form. The procedure for forming these side closures 2, 3 is as follows. First, each fold panel 32 is cut along the valley fold lines m and n.
Fold each panel 42 outward at the valley fold lines t and u, and simultaneously fold each lid panel 12 at the mountain fold lines e and f, and each lid panel 22 at the mountain fold lines i and j. Thus, the folded panels 32 and 42 and the small folded panels 33 and 43 adjacent thereto are overlapped to form triangular overlapping portions. Next, the inner surfaces of the opposing rib panels 13 and 23 and the inner surfaces of the small rib panels 34 and 44 are attached to each other to form a linear overlap portion, and the linear overlap portion is turned down to cover each of the triangular overlap portions with the lid panel. By bending toward 12 and 22 and adhering to these surfaces, side closures 2 and 3 are formed on both sides of the body 1 respectively. In addition, the above-mentioned triangular overlapping portion may be bent toward the side panels 21 and 31 and adhered to these surfaces.

In the sealed paper carton C configured as described above, the gripping portion 14 is raised and pinched by a finger at the start of opening. When the gripper 14 is pinched and the opening is started, the packaging material 60 is opened.
Starts to be cut from the notches 15 and 15, the strip-shaped synthetic resin film 67 provided in the packaging material 60 having tearability in the length direction is torn by the width of the grip portion 14 and the entire packaging material 60 is gripped. The carton C will be torn at the body 1, as it will be torn at the same width as the part 14.

The grip portion 14 may be provided at the position as described above.However, in order to effectively use the synthetic resin film 67 and securely open it to the end, only the band-shaped region where the synthetic resin film 67 is laminated and the packaging material are used. It is preferable to form a grip portion by protruding a portion straddling two regions of the region. In this manner, the opening can be performed such that the side end of the synthetic resin film 67 defines one side edge of the opening portion.

FIG. 4 is a perspective view showing another embodiment of the sealed paper carton according to the present invention. The sealed paper carton C 'shown in FIG. 4 is assembled with a blank plate B' shown in FIG. It was created. In these figures, the same reference numerals are given to the corresponding parts under the previous embodiment.

Sealed paper carton C 'is the sealed paper carton C of the previous embodiment.
The appearance is substantially the same as that of the first embodiment except that a window hole S is formed in the upper panel 11 and a transparent film member is provided to close the window hole S. I have. In order to form the window hole S having such a configuration, the blank plate B 'is devised in this embodiment. That is, as shown in FIG. 6 (a), the packaging material 70 constituting the blank plate B 'is composed of a heat-fused resin layer 71 made of polyethylene having a thickness of 20 μm, a paper layer 72, and polyethylene having a thickness of 20μ. At the stage of laminating the adhesive layer 73 and the barrier layer 74 made of aluminum foil having a thickness of 7 to 9μ, the window hole S is punched out,
A transparent film member covering the window hole S from inside.
It was created by providing 75. Specifically, after the window holes S are formed as described above, an adhesive layer 76 made of polyethylene having a thickness of 20 μ, and a barrier layer 7 made of a polyvinylidene chloride-coated polyester film having a thickness of 12 μ are formed.
7, adhesive layer 78 made of polyethylene with a thickness of 20μ, thickness 40
It is made by laminating a heat-sealing resin layer 79 made of μ μ polyethylene. Therefore, the adhesive layer 7 is provided in the window S.
6.A portion of the transparent film member 75 including the barrier layer 77, the adhesive layer 78, and the heat-sealing resin layer 79 is in an exposed state, and this portion is transparent and has barrier properties and strength. ing. Also in this blank plate B ', the strip-shaped synthetic resin film 80 having tearability in the length direction (the direction of the arrow in FIG. 5) is positioned at the position shown by the dotted line in FIG. Position), the sixth
As shown in the cross-sectional view of FIG. 9B, the laminated layers are sandwiched between the adhesive layer 78 and the heat-sealing resin layer 79.
Further, similarly to the case of the previous embodiment, a grip portion 14 protruding with a width smaller than the width of the synthetic resin film 80 is formed at one end of the upper panel 11.

In addition, as the transparent film member 75, a member having an appropriate layer configuration having a barrier property and strength required according to the contents and the shape of the window hole S can be adopted.
For example, the transparent film member 75 may be constituted by using an ethylene / vinyl alcohol copolymer resin film, a stretched nylon film, a stretched polypropylene film, a polyester film, or the like for at least one layer thereof,
In the case of contents that do not require much barrier properties, a layer structure composed of only a polyethylene film without providing these films may be used.

Further, in order to form the window hole S closed by the transparent film member, instead of devising the layer configuration of the blank plate B 'as described above, the blank plate B made of the packaging material 60 of the previous embodiment is used. A transparent film member formed through the window hole S and cut to a size larger than the window hole S, and may be bonded to the window hole S with an adhesive so as to cover the window hole S from the inside. It is.

Then, assembling the sealed paper carton C 'of this embodiment from the blank plate B' is performed in the same manner as in the case of the sealed paper carton C of the previous embodiment. Further, the manner of opening the assembled sealed paper carton C 'is the same as in the previous embodiment. Also, in order to use the synthetic resin film 80 effectively and open it securely and straightly,
May be shifted so as to cover the portion of the packaging material 70 where the synthetic resin film 80 is not provided, as in the case of the previous embodiment.

Although two embodiments have been described, each sealed paper carton
Since each of the packaging materials 60 and 70 constituting C and C 'is mainly composed of the paper layers 62 and 72, there is a possibility that moisture or gas may enter and exit through the end faces of the paper layers. Therefore, in order to make the sealing property of the carton more complete, it is preferable to adopt an end face treatment configuration as shown in FIG. 7 in the bonding portion between the upper panel portion P1 and the adhesive flap portion F.

That is, at the side end of the adhesive flap portion F,
A thin portion is formed by cutting off half of the thickness of the packaging material (substantially the middle of the paper layer becomes half the thickness of the packaging material because the thickness of the paper layer is relatively large) from the front side, and this thin portion is formed. After processing to the original thickness by inverting at the half, the back side of the upper panel part P1 and the front side of the adhesive flap part F are overlapped as shown in the figure and adhered by heat sealing to form a sealed paper carton. The paper layer is not exposed on the inner surface of the. By performing such an end face treatment, the sealing property of the carton becomes more complete. Further, it is possible to avoid that the thickness of the bonding portion becomes three times as thick as the packaging material as in the case where the edge of the blank plate is simply folded back, and furthermore, since the paper layer is not exposed, the used paper is not used. It can also be used.

1 and 2 show an example in which the width of the side panels 31 and 41 is considerably smaller than the width of the upper panel 11 and the lower panel 21. These dimensional ratios can be determined appropriately according to the shape of the contents. Therefore, in some cases, the width of each of the panels 11, 21, 31, 41 may be the same, and the longitudinal section of the body may be square.

[Effects of the Invention] Since the sealed paper carton of the present invention is formed by assembling blank plates without gaps, the carton itself has a sealing property. Can be stored for a long time.

And, in the packaging material forming the carton, a band-shaped synthetic resin film having tearability in the length direction is laminated on the inside of the paper layer in a state where the start end and the end coincide when the blank plate is wound, Furthermore, by providing a grip portion formed by protruding a portion that straddles two regions of a band-shaped region where the synthetic resin film is laminated and a region of only the packaging material,
If you hold the grip with your fingers and pull it while turning the carton,
The opening is performed in a state where the band-shaped region is one side edge of the unsealing portion and the region of only the packaging material is the other side edge, but tearing in the region of only the packaging material is defined by the side edge of the synthetic resin film. Therefore, even if the unsealing portion gradually narrows, the tear can be reliably opened to the end in the circumferential direction without ending in the middle of the trunk wall.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of one embodiment of a sealed paper carton according to the present invention, FIG. 2 is an exploded view of a blank plate forming the sealed paper carton shown in FIG. 1, FIG. ) Is a partial cross-sectional view showing the layer structure of the packaging material constituting the blank plate shown in FIG. 2, and FIG. 3 (b) is a strip having a tearing property in the length direction in the packaging material of FIG. 3 (a). FIG. 4 is a partial cross-sectional view showing a layer structure of a portion provided with the synthetic resin film of FIG. 4, FIG. 4 is a perspective view showing another embodiment of the sealed paper carton according to the present invention, FIG. 6 (a) is a partial cross-sectional view showing a layer structure of a boundary portion of a window hole in a packaging material forming the blank plate shown in FIG. 5, and FIG. FIG. 5B shows the packaging material constituting the blank plate shown in FIG. 5 having tearability in the length direction. FIG. 7 is a partial cross-sectional view illustrating a layer configuration of a portion where a belt-shaped synthetic resin film is provided. FIG. 7 is a cross-sectional view illustrating a layer configuration for explaining an example of a bonding portion at both ends of a blank plate. C, C '... Sealed paper carton, B, B' ... Blank plate, S ...
... Window, P1 ... Top panel, P2 ... Bottom panel, P
3, P4 ... horizontal panel, F ... adhesive flap, 1 ...
… Torso, 2,3 …… Side closure, 11 …… Top panel, 12…
... Lid panel, 13 ... Rib panel, 14 ... Grip part, 15 ...
Notch, 21 ... Bottom panel, 22 ... Lid panel, 23 ... Rib panel, 31 ... Side panel, 32 ... Fold panel, 33 ...
… Small fold panel, 34 …… Small rib panel, 41 …… Side panel, 42 …… Fold panel, 43 …… Small fold panel, 44 …… Small rib panel, 51 …… Center flap, 52 …… Lid flap,
53 ... rib flap, 60 ... packaging material, 61 ... heat-sealing resin layer, 62 ... paper layer, 63 ... adhesive layer, 64 ... barrier layer, 65
... Adhesive layer, 66 ... Heat-fused resin layer, 67 ... Synthetic resin film (having tearability in the longitudinal direction), 70 ... Packaging material, 71 ... Heat-fused resin layer, 72 ... Paper Layer, 73 ... adhesive layer,
74 ... barrier layer, 75 ... transparent film member, 76 ... adhesive layer, 77 ... barrier layer, 78 ... adhesive layer, 79 ... heat fusion resin layer, 80 ... synthetic resin film (length direction) A, b, c, d, e, e ', f, f', i, j, o, p, s ... mountain fold, g, g ', h, h', k, l, m, n, q, r, t, u …… valley fold line

Claims (2)

(57) [Scope of request for utility model registration] 1. A blank plate having a folding line parallel to each other is bent at each folding line, wound and adhered at both ends to form a rectangular cross section formed of a rectangular upper panel, a lower panel, and a pair of side panels. While forming a body portion of a shape, a rectangular lid panel is connected to both ends of the upper panel and the lower panel, and a rib panel is connected to each lid panel. At both ends, a right-angled isosceles triangular-shaped folded panel is continuously provided on the bottom side, and on each oblique side of each folded panel, a right-angled isosceles is continuously provided on one side sandwiching a right angle with the adjacent lid panel. A pair of triangular small folding panels are continuously provided on the side opposite to the right angle, and the other small panel provided adjacent to the rib panel adjacent to the other side of the small folding panel sandwiching the right angle. Panels are connected to each other, and each of the folded panels is bent outward, and at the same time, each of the folded panels is bent inward. Then, the inner surfaces of the rib panels facing each other and the inner surfaces of the small rib panels are bonded to each other to form a linear overlap portion, and the linear overlap portion is turned down so that the triangular overlap portions become side panels or lids. In a sealed paper carton assembled by folding toward a panel and forming side closures on both sides of the body by bonding to these surfaces, the blank plate is made of a wrapping material mainly composed of a paper layer, A band-shaped synthetic resin film having tearability in the length direction, in a state where the start end and the end coincide when the blank plate is wound. It is laminated on the inner side of the layer, and further provided is a grip portion formed by projecting a portion extending over two regions of a band-shaped region where the synthetic resin film is laminated and a region of only the packaging material. To sealed paper carton. 2. The sealed paper carton according to claim 1, wherein a window hole is formed in the upper panel and a transparent film member for closing the window hole is provided.