JP2002154534A - Paper container for liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a good-looking quadratic prism paper container for liquid which causes no problem in pouring the liquid contained. SOLUTION: A side panel 131 connected through a longitudinal folding line (a) with a top panel 121 formed with a hole 4 for mounting a mouth cap and an inside sealing piece 132 connected jointly to the panel 131 can make an inward folding line an outward folding line (h1) and are divided into two by an inward folding line (i) extending diagonally upward starting from a cross point (k1) where the folding line (a) and the folding line (h1) cross each other and by an inward folding line (j) extending diagonally upward starting from the cross point (k1) where the line (h1) and a sideways inclining folding line (b) cross each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid container having a square pillar shape and a new shape, which has a gable-roof design, and more particularly to a liquid container for pouring out a liquid from a spout mounting hole provided in a top sealing portion. It relates to a good square pillar-shaped liquid paper container.

[0002]

2. Description of the Related Art As a container to replace a glass bottle, a metal can, and a plastic bottle, a square pillar-shaped liquid paper container having a gable roof at the top is widely used. However, this gable-roof type liquid paper container has spread in limited fields such as milk, juice and sake, so it has a strong image as a milk pack and sake pack, and its spread in other fields is insufficient. there were.

[0003] In addition, when removing the contents such as milk from a liquid paper container of this type, regardless of whether the top of the roof is opened or the stopper is attached to the top or the like, the container is removed. The fingers having the grip on the side plate, which is the weakest part of the torso, make the work of removing the contents such as milk extremely unstable.

Therefore, as a liquid paper container for solving such a problem, for example, Japanese Patent Application Laid-Open No. 2000-694.
There is an invention disclosed in Japanese Patent Application Laid-open No. 9-No.

As shown in FIG. 4, in the liquid filling carton 210 for fixing and sealing the side wall joint portion 206 and the bottom portion 207, the left and right side walls 211, 212, 213, The triangular flaps 215 and 216 integrally formed from the base 214 are extended, and the seal portions 22 are formed outside the oblique sides 221 and 222 through folding.
3, 224, and a mountain fold line 22 between the flap and the side wall.
5 and 226, and mountain fold lines 208 and 209 on the side wall.
Is extended to the flap side, and the flaps 217 and 217 on one of the right and left side walls are formed with fold lines 227 and 228 which intersect perpendicularly with the oblique sides of the flap starting from the intersection of the mountain fold line and the mountain fold line on the left and right side walls. Then, when the flap is bent, the seal portions 223 and 224 are positioned diagonally so that the sealing surfaces 223 and 224 face each other to form a liquid-filled paper carton.

The present invention is a liquid paper container which solves the above-mentioned problem by positioning the seal portions 223 and 224 on a diagonal line.
5, when the flaps 217 and 217 on the side walls are folded and the triangular flap is continuously folded, as shown in FIG. 5, the spout hole 234 provided in the triangular flap 215 is closed almost half. However, there is a problem that the speed of discharging the content liquid is reduced.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems relating to a new type of rectangular column-shaped liquid-filled paper carton in which the top seal portion is located diagonally of the container. It is an object of the present invention to provide a rectangular paper-like liquid paper container which has no problem in pouring out a liquid content and has a good appearance.

[0008]

Means for Solving the Problems A first invention of the present invention is:
It has a quadrangular prism-shaped body, a top sealing part formed at one opening end of the body, and a bottom sealing part formed at the other opening end of the body. Each of the four side plates and the adhesive piece connected to an adjacent side plate while being connected to one of the side plates via a vertical bending line, the top sealing portion includes: A pair of opposing triangular-shaped end plates that are connected to the side plate via a bending line that is inclined in the horizontal direction, and one side of which overlaps the vertical folding line, are inclined in the horizontal direction of the one end plate. The end of the folded line and the tip of the laterally inclined bending line of the other end plate are connected to each other through the laterally inclined bending line so that one end of the other bending edge extends in the vertical direction. A pair of other opposing triangular shingles overlapping the fold line,
The upper edge of the adhesive piece and the lateral direction having the same inclination as the side overlapping the laterally inclined bending line of the other side of the roof shingle are continuously provided on the side overlapping the vertical bending line of the one end plate. And a second adhesive piece connected to a side overlapping with the vertical folding line of the roof shingle, and further, a vertical folding line of each triangular end plate. At the edge of the side that does not overlap and is not connected to the side panel, a second folding line inclined in the same direction as the laterally inclined folding line where the side panel and the roof panel are connected is provided. The inner sealing piece provided to the outside through, and the edge of the side that does not overlap with the vertical folding line of each triangular roof plate and that is not connected to the side plate is , The side plate and the end plate are connected in a row and the same direction as the laterally inclined bending line The outer sealing piece provided to the outside through the two bending lines, the adjacent inner sealing piece and the outer sealing piece are connected to each other via the vertical bending line, and the one inner sealing piece is provided. A second folding line connected to a side overlapping the vertical bending line of the stopper piece and having the same inclination as an upper edge of the second adhesive piece and a side overlapping the second folding line of one side of the outer sealing piece. And an adhesive sealing piece connected to a side overlapping with the vertical bending line of the outer sealing piece, and formed with each end plate, each roof plate, and each inner sealing piece. Each outer sealing piece is sequentially connected in a ring shape, and the pair of triangular end plates and the inner sealing piece connected to the end plate have a vertical folding line and a laterally inclined folding line. A half of a valley fold line that extends diagonally upward starting from the crossing point of intersection, and The plate, spout mounting hole for the spout mounting is bored, and the respective end plate and the inner sealing strips to folded inwardly through the valley fold lines,
Fold the opposing end plate through the respective folding lines between the roof plates, and polymerize the inner sealing pieces folded by the outer sealing pieces so that the opposing roof plates are folded over,
A liquid paper container formed by adhering the overlapping portion, the end plate being connected to the roof plate on which the plug mounting hole is drilled and a longitudinal fold line, The inner sealing piece connected to the end plate is formed such that the valley fold line is a mountain fold line, and a starting point is an intersection point where the vertical fold line and the mountain fold line intersect with each other. A valley fold line extending diagonally upward, starting from an intersection where the mountain fold line and the fold line inclined in the lateral direction intersect with each other,
A liquid paper container characterized in that:

As described above, according to the first aspect of the present invention, the end plate connected to the roof plate on which the plug attachment hole is formed through the longitudinal bending line and the end plate connected to the end plate are provided. The provided inner sealing piece is a valley fold line that extends obliquely upward with the valley fold line as a mountain fold line and an intersection point where the vertical fold line and the mountain fold line intersect with each other. In addition, since the mountain fold line and the fold line inclined in the lateral direction intersect with each other at a valley fold line extending obliquely upward starting from an intersection point where the fold line and the fold line inclined in the lateral direction intersect with each other, when assembled into a container, In addition, the entirety of the spout mounting hole is not hidden by the end plate, and the content liquid can be poured out without difficulty.

[0010] In addition, since one of the pair of roofing plates is provided with a plug mounting hole for mounting a plug, when the container is formed into a container, the plug is attached to the corner of the container. Since the container can be attached to the vicinity and the container is held by gripping the ridge of the container, the contents can be taken out in a stable state.

According to a second aspect of the present invention, in the first aspect, a folded adhesive piece, a folded second adhesive piece, is provided on a lateral edge of each of the adhesive piece, the second adhesive piece, and the adhesive sealing piece. A paper container characterized in that folded adhesive sealing pieces are provided continuously with each other.

As described above, according to the second aspect, the adhesive piece, the second adhesive piece, the folded adhesive piece, the folded second adhesive piece, and the folded adhesive piece are respectively provided on the lateral edges of the adhesive piece, the second adhesive piece, and the adhesive sealing piece. Since the pieces are provided continuously with each other, the liquid does not permeate from the end face of the paper constituting the paper container even if the liquid content is filled.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments. As shown in FIG. 1, the paper container of the present invention has a quadrangular prism-shaped body 1, a top sealing portion 2 formed at one opening end of the body, and a top sealing portion 2 formed at the other opening end of the body. And a bottom sealing portion 3 formed, and the top sealing portion 2 has a structure located on a diagonal line of the paper container. Further, a plug mounting hole 4 is formed in the top sealing portion.

The material used for the paper container may be a composite sheet made of a thermoplastic resin whose inner layer and outer layer are made of a heat-sealable thermoplastic resin with paperboard as the base material. Component materials can be used. For example, [outside of container] polyethylene / paperboard / polyethylene / polyethylene terephthalate film / polyethylene formed by forming an inorganic compound containing a metal oxide such as silicon oxide or aluminum oxide into a thin film having a thickness of 100 to 1000 mm by vacuum evaporation. Outer] can be used.

FIG. 2 is a front view showing one embodiment of a blank forming the paper container of the present invention. In FIG. 2, the blank has four side plates 11 through a vertical bending line a,
12, 13, and 14 are continuously provided, and a side plate 11 at one end is further provided.
, An adhesive piece 15 is continuously provided via a vertical bending line a.

A pair of triangular end plates 11 are connected to the upper edges of the side plates 11 and 13 via a bending line b inclined in the horizontal direction and one side of which overlaps the vertical bending line a.
1, 131 are extended.

The upper edges of the side plates 12 and 14 are connected to each other via a bending line c inclined in the horizontal direction having an angle of inclination opposite to that of the bending line b inclined in the horizontal direction. A pair of triangular roof panels 121 and 141 overlapping the folding line a in the direction extends.

As described above, the main shingles and the roof shingles are alternately connected.

At the upper edge of the adhesive strip 15, one of the end plates 111
Are continuously provided on the side overlapping the vertical folding line a, and
A second adhesive piece 151 is continuously extended through a lateral bending line d having the same inclination as the side overlapping the laterally inclined folding line c of the other side of the roof plate 141.

The edge of the side that does not overlap with the vertical bending line a of the end plates 111 and 131 and that is not connected to the side plates 11 and 13 has a bending line c inclined in the horizontal direction and a tilting direction. The inner sealing pieces 112 and 132 are continuously provided via a bending line e inclined in the horizontal direction, which is the same as the above.

The edges of the sides that do not overlap with the vertical bending lines a of the roof plates 121 and 141 and that are not connected to the side plates 12 and 14 are provided with bending lines b inclined in the horizontal direction. Outer sealing pieces 122 and 142 are connected to each other via a bending line f inclined in the horizontal direction in the same direction.

The upper end of the second adhesive piece 151 is connected to a piece overlapping the vertical bending line a of the one inner sealing piece 112, and extends in the lateral direction of one piece of the outer sealing piece 142. Adhesive sealing pieces 152 are continuously provided through a horizontally inclined bending line g having the same inclination as the side overlapping the inclined bending line f.

Adjacent inner sealing piece 112 and outer sealing piece 1
22, the outer sealing piece 122 and the inner sealing piece 132, the inner sealing piece 132 and the outer sealing piece 142, and the inner sealing piece 112 and the adhesive sealing piece 152 respectively via the bending line a in the vertical direction. It is installed continuously.

A plug mounting hole 4 for mounting a plug is formed in one of the pair of roof panels 121 and 141. In FIG. 1, the plug mounting hole 4 is provided on the roof plate 121, but the plug mounting hole 4 may be provided on the roof plate 141.

An end plate 131 connected to the roof plate 121 on which the plug mounting hole is formed through a longitudinal bending line a, and an inner sealing piece connected to the end plate 131 132 and has a longitudinal bending lines a and laterally by the inclined bent line b is 2 minutes convex fold h ₁ extending obliquely upward starting from the intersection point k ₁ crossed.

Further, longitudinal folding lines a and a convex fold h ₁ extending obliquely upward is 2 minutes valley fold lines i extending obliquely upward starting from the intersection point k ₁ crossed. Furthermore, it is 2 minutes valley fold line j extending obliquely upward the intersection k ₁ where the convex fold h ₁ and laterally inclined fold line b extending obliquely upwardly crosses the origin.

The other end plate 111 and the inner sealing piece 112 connected to the end plate 111 are provided at an intersection k where a vertical bending line a and a horizontal bending line b intersect.
_It is divided into _two by a valley fold line h2 extending obliquely upward from ₂ as a starting point.

The edges of the adhesive piece 15, the second adhesive piece 151, and the adhesive sealing piece 152 that are not in contact with the folding line a are folded back through the folding line to form the adhesive piece 16 and the folded second adhesive piece. 161, a folded adhesive sealing piece 162 is continuously provided.

By providing a folded piece on each of the adhesive pieces, the end face of the blank can be protected from the contents.
In particular, when the contents are liquid, there is an effect of preventing the liquid from penetrating from the end face of the paperboard constituting the composite sheet of the blank.

Next, a procedure for assembling a paper container from the blank will be described in detail. First, the bending line a is folded by a known method, and the adhesive piece 15, the second adhesive piece 151, and the adhesive sealing piece 152 are connected to the other side edge plate 14 and the roof plate 1 at the other edge.
41. The outer sealing piece 142 is polymerized and heat-sealed to form a sleeve.

The sleeve attached to the body is raised into a quadrangular prism shape, and a known bottom portion is formed to form a bottom closed portion 3. It can be seen that each of the pair of triangular-shaped end plates, the side plates connected to the triangular end plate, and the inner sealing pieces are arranged at positions facing each other. Similarly, it can also be seen that the set of triangular roof shingles, the side panels connected to it, and the outer sealing pieces are arranged at positions facing each other.

In the folded sleeve, the overlapped inner sealing piece and outer sealing piece have different widths from each other.
There is no complete overlap, and it is easy to open when a square pillar is formed.

[0033] After filling the contents, laterally inclined folding lines b, c and convex fold h _1, valley fold line h _2, concave fold i, the valley fold lines j, opposing end planks 111,1
31 is folded inward (after the end plate 131 is folded into a W shape), and almost at the same time, the facing roof plates 121 and 14 are opposed to each other.
When the inner sealing piece 11 is folded into two,
2, 132 are superposed so as to be sandwiched between the outer sealing pieces 141, 142, and the superposed portion is heat-sealed to form the top sealing portion 2.

After the end plate 131 is folded into the W-shape and then into the roof plate, the plug mounting hole 4 formed in the roof plate 121 has the entire area exposed at the top, and the content liquid is wide. It becomes possible to pour out from the area.

Since the end plate and the roof plate connected to each side plate are connected to each other via lateral bending lines having different inclinations, the top sealing portion 2 is located on the diagonal line of the paper container. Structure.

As shown in FIGS. 1 and 2, a plug mounting hole 4 is formed in one of the roof plates, so that when a liquid container is taken out by mounting a plug, a ridge portion of the paper container is taken out. To hold the paper container.
The contents can be poured out in a stable state.

The blank shown in FIG. 2 is assembled, and the molded container of the present invention (see Example 1, FIG. 3) in which the folded portion of the end plate does not obscure the plug mounting hole, and the end plate obtained by assembling the blank shown in FIG. Folded part is one of the plug attachment holes
Conventional molded container that hides about / 3 (Comparative Example 1, see FIG. 5)
And the rate at which the content liquid (water) was poured out was measured by the following method. (The size of each container is vertical; 65m
m, width: 65 mm, height: 108 mm, and the diameter of the plug attachment hole is 25 mm). The results are shown in Table 1.

Method for measuring the rate at which the content liquid is poured out ‥ Example 1
And filling the container of Comparative Example 1 with 400 ml of water,
(1) The container is tilted at 90 ° and water is poured out, and when the water stops flowing, the tilt is set at 180 ° and the time until all the water flows out is measured. (2) Water is poured at an angle of 180 ° from the beginning of the container, and the time until all the water flows out is measured (measurement unit; second, n = 3).

[0039]

[Table 1]

It can be seen that there is a difference in the pouring speed if the plug mounting hole is not hidden if it is hidden.

[0041]

As described above, the paper container of the present invention is designed so that the bent portion of the end plate does not overlap with the spout mounting hole, so that the content liquid can be poured out smoothly. In addition, if the spout mounting hole is arranged near the corner of the paper container, the contents can be poured out in a more stable state.

[Brief description of the drawings]

FIG. 1 is a perspective explanatory view showing one embodiment of a liquid paper container of the present invention.

FIG. 2 is a front explanatory view showing one embodiment of a blank used for the liquid paper container of the present invention.

FIG. 3 is a schematic explanatory view showing a state where the blank of FIG. 2 is assembled into a paper container and viewed from above.

FIG. 4 is an explanatory front view showing a conventional example of a blank used for a liquid paper container.

FIG. 5 is a schematic explanatory view showing a state where the blank of FIG. 4 is assembled into a paper container and viewed from above.

[Description of Signs] 1 Body 2 ‥‥ Top Seal 3 ‥‥ Bottom Seal 4 ‥‥ Plug Mounting Holes 11,12,13,14 ‥‥ Side Plate 15 ‥‥ Adhesive Pieces 111,131 {Wife plate 121, 141} Roof plate 151} Second adhesive strip 112, 132 {Inner sealing strip 122, 142} Outer sealing strip 152} Adhesive sealing strip 16} Folded adhesive strip 161} {Folded second adhesive piece 162} Folded adhesive sealing piece a} Vertical bending line b, c, d {Horizontal bending line e, f, g} Horizontal bending line h ₁ ‥‥ mountain fold line h ₂ , i, j ‥‥ valley fold line k ₁ , k ₂ ‥‥ intersection 206 ‥‥ side wall junction 207 ‥‥ bottom 208, 209 ‥‥ side wall fold line 210 ‥‥ liquid filling Cartons 211, 212, 213, 214 ‥‥ left and right side walls 215, 16 {triangular flap 217} flap on side wall 221, 222 {hypotenuse 223, 224} seal 225, 226 {mountain fold line 227, 228} pleat fold line 234} Holes)

Claims (2)

[Claims] 1. A body having a quadrangular prism-shaped body, a top sealing portion formed at one opening end of the body, and a bottom sealing portion formed at the other opening end of the body. The body includes four side plates via a bending line in a vertical direction, and an adhesive piece connected to one of the side plates and connected to an adjacent side plate. The sealing portion is continuously provided to the side plate via a bending line inclined in a lateral direction, and
A pair of triangular endplates, one side of which overlaps the vertical fold line, the end of the laterally fold line of the one end plate, and the laterally fold line of the other end plate A set of other opposing triangular roofing panels, which are continuously provided via a bending line inclined in the horizontal direction so that the tip is continuous, and one side of which overlaps the other bending line in the vertical direction, The upper edge of the adhesive piece and the lateral direction having the same inclination as the side overlapping the laterally inclined bending line of the other side of the roof shingle are continuously provided on the side overlapping the vertical bending line of the one end plate. And a second adhesive piece connected to a side overlapping with the vertical folding line of the roof shingle, and further, a vertical folding line of each triangular end plate. Of the side that does not overlap and is not connected to the side plate On the edge, an inner sealing piece provided outward through a second folding line inclined in the same direction as a folding line inclined in the lateral direction in which the side plate and the roof plate are continuously provided, On the edge of the side of the triangular roof shingle that does not overlap with the vertical folding line and that is not connected to the side plate, the side plate and the end plate are connected in a laterally inclined bending The outer sealing piece provided outward through a second bending line inclined in the same direction as the line, and the adjacent inner sealing piece and outer sealing piece are connected to each other through a vertical bending line. A side overlapping the longitudinal bending line of the one inner sealing piece, and an upper edge of the second adhesive piece and a side overlapping the second bending line of one side of the outer sealing piece. Side that is continuously provided via a second bending line having the same inclination as that of the outer sealing piece and overlaps the vertical bending line of the outer sealing piece. The adhesive sealing pieces to be connected, and formed with, each end plate and each roof plate, each inner sealing piece and each outer sealing piece are sequentially connected in a ring shape, the set of triangular end plates and The inner sealing piece connected to the end plate is bisected by a valley fold line extending obliquely upward starting from an intersection where a vertical fold line and a horizontal fold line intersect. On either one of the shingles, there is a spigot mounting hole for spigot mounting,
Each of the end plates and the inner sealing piece are folded inward through the valley fold lines, and the opposite end plates are folded between the roof plates via the respective folding lines, and the opposing roof plates are folded down. A liquid paper container formed by polymerizing the inner sealing piece folded by the outer sealing piece in this way and bonding the polymerized portion, wherein the stopper mounting hole is provided. The end plate connected to the roof plate via a vertical folding line and the inner sealing piece connected to the end plate are used to make the valley fold line a mountain fold line and to make a vertical fold line. Starting from an intersection where the line and the mountain fold line intersect each other, is divided into two by a valley fold line extending obliquely upward, and an intersection where the mountain fold line and the fold line inclined in the horizontal direction intersect with each other As a two-fold valley fold line that extends diagonally upward, A liquid paper container characterized by the following. 2. A folded adhesive piece, a folded second adhesive piece, and a folded adhesive sealing piece are respectively provided continuously on lateral edges of the adhesive piece, the second adhesive piece, and the adhesive sealing piece. The liquid paper container according to claim 1, wherein