JPH11165731A - Paper container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper container having a means for easily unsealing a folding ejection port. SOLUTION: The paper container comprises a bottom cut 12 provided on or in the vicinity of a border lateral crease 11 sectioning between a center gradient panel 6 and a body panel 10 approximately in parallel to the border lateral crease 11, an approximately U-shaped first half cut line 14 comprising a pair of side cuts 13a, 13b extending upward from both ends of the bottom cut 12 to the vicinity of a height of an intersection 20 of a longitudinal crease 7, lateral creases 8a, 8b and gradient creases 9a, 9b of a spout panel, and a pair of second half cut lines 15a, 15b within a region surrounded by the first half cut line 114 extending to broaden upward from two points below open ends of the both side cuts 13a, 13b and further extending upward without crossing the first half cut line 14 to reach in left and right inner top seal panels 4a, 4b. In addition, a tensile piece forming half cut line 16 symmetric with respect to an extension 7a of the longitudinal crease 7 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper container having a gable roof type top for storing a beverage liquid such as milk or juice.

[0002]

2. Description of the Related Art Conventionally, a beverage paper container represented by a milk carton is formed by molding a paperboard material having a thermoplastic resin coated on the front and back surfaces, and a flat lower portion of a rectangular cylindrical body is closed. After closing the bottom and filling it with liquids such as beverages as contents, the top is folded into a gabled roof type, and the so-called goebel top type paper container formed by sealing that part by heat sealing is Widely used.

In order to open this kind of paper container, first, as shown in FIG. 6, (A) peel off the seal of the outer top seal panel and open the triangular panel on both the left and right sides.
Push both ends to the extent that they cover the left and right, and (C)
Next, the thumb and forefinger are applied to the creases defining the right and left triangular panels of the folding spout panel exposed by spreading and the upper two panels forming the gable roof top, and the inner surface of the inner top sealing panel. The spout panel forming the spout is pulled forward so as to pop out while peeling off the seal. However, if the inner surface seal of the inner top seal panel is strong, the opening operation is often difficult.

Therefore, in order to facilitate the opening operation, for example, as shown in FIG. 7 (Japanese Utility Model Application Laid-Open No. 63-128931), a tension member separately prepared on a spout panel forming a folding type spout of the type described above by opening the opening It has been proposed that a piece 21 is attached and the tension piece 21 is pulled to peel off the inner surface seal of the inner top seal panel to open a spout.

As shown in FIG. 8 (JP-A-7-315375), a U-shaped
A half-cut line 22 having a U-shaped half-cut line 22 is provided immediately above the upper cut end, or a U-shaped half-cut line 2 is formed from the center of the horizontal film piece.
2. A T-shaped film piece 23, the other side of which is extended on the portion surrounded by 2, is peeled off, and a portion surrounded by the U-shaped half-cut line 22 is peeled off when opening, and the peeled portion is pulled by a pulling piece. There has been proposed a method in which the inner inner top seal is peeled off while being pulled up to open a spout.

[0006]

[0007] However, as shown in FIG. 7, the one with the tension piece 21 attached thereto has a specific position on the spout panel except for a free end where the minute tension piece 21 can be pulled. In addition, there is a problem in that a mechanically mass-producing process of adhering to the pulling plate is required, and the free end of the pulling piece 21 becomes an obstacle during box making and handling.

As shown in FIG. 8, when a U-shaped half-cut line 22 is provided on a spout panel so as to face upward, a portion surrounded by the half-cut line 22 is peeled off. It is not considered that the pulling force concentrates on the vertical creasing when it is pulled up. Therefore, the inner top seal is peeled off and the spout is not opened smoothly. On top of that,
Alternatively, in the case where the T-shaped film piece 23 is attached, the number of steps of attaching the film increases, so that the cost increases.

Accordingly, an object of the present invention is to provide a paper container in which means for facilitating pulling out of a spout panel for forming a spout can be provided without increasing the number of processing steps and increasing costs. It is in.

[0009]

Means for Solving the Problems The present invention has been made to achieve the above object, and the invention according to claim 1 has a bottomed material made of a paperboard material coated on both sides with a thermoplastic resin. The gable roof type top is formed on the torso, and the folding type spout panel which is folded under the upper two panels forming the gable roof type top is provided with two left and right inner tops. A left and right triangular panel located below the seal panel and the inner top seal panel, and a central inclined panel located between the triangular panels; a longitudinal crease and an inner top seal defining the two inner top seal panels; A lateral crease defining the panel and the triangular panel; a diagonal crease defining the triangular panel and the centrally inclined panel; and a boundary lateral crease defining the centrally inclined panel and the torso panel. In the paper container, a bottom cut portion provided on the spout panel or the body panel on or near the boundary horizontal crease substantially in parallel with the boundary horizontal crease, and the spout panel is disposed upwardly from both ends of the bottom cut portion. A substantially U-shaped first half-cut line extending from the vertical crease, the horizontal crease, and the diagonal crease to near the height of the intersection thereof, and having a pair of side cut portions having an open end at the upper end narrower than both ends of the bottom cut portion; In the area surrounded by the first half-cut line, two points below the open ends of the cut portions on both sides are divergently extended from each other and extend upward without further intersecting with the first half-cut line. A pair of second extending upwardly into the left and right inner top sealing panels
A half cut for forming a tension piece, comprising a half cut line, wherein a pair of side cut portions of the first half cut line and a pair of second half cut lines are symmetrical with respect to an extension of the vertical crease. The configuration was such that a line was provided.

According to this paper container, when opening, the right and left triangular panels of the spout panel are spread right and left, and the spout panel is opened so as to form a substantially square surface, and a half-cut for forming a tension piece is formed. The line is delaminated from the bottom cut, and this part is pinched with a finger and pulled forward. Due to this, delamination proceeds along the side cut portion,
The portion surrounded by the substantially U-shaped first half-cut line is peeled off to form a tensile piece. When the peel reaches the open end of the first half-cut line, the peel is transferred from the open end to a pair of second half-cut lines in a region surrounded by the first half-cut line, and the second half-cut line The delamination proceeds along. At this time, the side cut portion of the first half-cut line and the second half-cut line are provided at a sharp angle change, but both open ends of the first half-cut line and the second half-cut line Between the two open ends of the first half-cut line to the second half-cut line because there is a variation in the peeling force and direction,
In accordance with the force and direction of the peeling from both open ends of the first half-cut line, the peeling follows the path that is not always constant, and
Since the second half-cut line is transferred to the half-cut line and the second half-cut line is located on the pulling direction side, the peeling of the first half-cut line from both open ends is not in a fixed direction. Following the reasonable path, it is reliably transferred to the second half-cut line.

When the tension is further continued, delamination proceeds upward along the pair of second half-cut lines, and the peeling reaches the upper ends of the pair of second half-cut lines that have widened and stops.

The delamination is performed as described above.
In the process of delamination, a force is applied in the direction of peeling to the sealing portion between the inner surface of the inner top seal panel and the inner surface of the outer top seal panel of the upper panel due to the pulling of the tension piece, the portion gradually peels off, and the delamination occurs. The peeling width becomes narrower as approaching the transfer position from the open end of the first half-cut line to the second half-cut line.
It concentrates on the vicinity of the intersection of the horizontal crease and the oblique crease, thereby easily and reliably peeling off the seal portion between the inner surface of the inner top seal panel and the inner surface of the outer top seal panel at the same location. When the delamination reaches the upper end of the second half-cut line, part or most of the seal portion on the inner surface of the inner top seal panel and the inner surface of the outer top seal panel is peeled off, and further formed by the delamination. By pulling the pulling piece, the seal between the inner surface of the inner top seal panel and the inner surface of the outer top seal panel is completely peeled off, and the spout panel is pulled out and opened.

When the tension piece is further pulled from the time when the delamination reaches the upper end of the second half-cut line, the pair of second half-cut lines gradually expand upward and end. The tension piece does not break off from the upper end of the second half-cut line due to the force.

According to a second aspect of the present invention, the pair of second half-cut lines are separated from each other from two points below the open ends of the both-side cut portions in a region surrounded by the first half-cut lines. It extends substantially in parallel, extends further upward without intersecting the first half-cut line, and gradually expands in an inverted octagon above the line connecting the open ends to form inside the left and right inner top sealing panels. It was configured so as to reach.

From this configuration, the first half-cut line and the second half-cut line
The change in the angle between the half-cut line and the portion extending in parallel with each other is gentle, and the peeling of the first half-cut line from both open ends is the change in the angle with the first half-cut line, the second half-cut Since it is transferred to the portion extending in parallel to the line, the tensile force acts in the direction in which the parallel portion of the second half-cut line extends, and delamination occurs upward along the second half-cut line. Can be easier.

According to a third aspect of the present invention, the pair of second half-cut lines are formed from two points below the open ends of the cut portions on both sides in a region surrounded by the first half-cut line. A parallel half-cut line that extends upward substantially in parallel with each other without intersecting with the first half-cut line, and a region below the upper end of the parallel half-cut line within a region surrounded by the parallel half-cut line And a divergent half-cut line portion extending upward from the two points in an inverted octagon and extending upward.

According to this configuration, when the peeling of the portion surrounded by the parallel half-cut line portion of the pair of second half-cut lines reaches the upper end of the parallel half-cut line portion, the peeling is performed from the upper end by the pair of divergent half-cut lines. Delamination proceeds along the flared half-cut line portion. At this time,
Even if the parallel half-cut line portion and the divergent half-cut line portion are provided with a sharp change in angle, the upper end of the parallel half-cut line portion and the divergent half-cut line portion are connected by a half-cut. Since there is no variation, even if there is variation in the peeling force and direction from the upper end of the parallel half-cut line part toward the half-cut line part, it is always constant according to the peeling force and direction from the upper end of the parallel half-cut line part. The peeling will be transferred to the half-spread line portion that spreads along a path that cannot be said, and in combination with the fact that the half-spread line portion is further positioned in the tension direction,
The peeling from the upper end of the parallel half-cut line portion is not in a fixed direction but follows a reasonable path without fail and spreads reliably to the half-cut line portion.

According to a fourth aspect of the present invention, the bottom cut portion of the first half cut line is provided on a body panel near a boundary lateral crease.

According to this structure, since the bottom cut portion of the first half cut line is provided on the body panel near the boundary horizontal crease, the bottom cut portion is easily lifted and the same portion can be easily delaminated.

The invention described in claim 5 has a configuration in which shredding preventing means is applied to the lower end or the upper end of each of the pair of second half cut lines.

According to this configuration, the shredding preventing means is provided at the lower end or the lower end and the upper end of each of the pair of second half-cut lines, so that the delamination reaches the lower end or the upper end of the second half-cut line and the tensile force is applied to the same portion. Even if force is applied, since the tearing prevention means prevents tearing of the part where the half-cut line is not applied from the same part, there is no possibility that the part of the tensile piece formed by the delamination will be cut off from the same part, Sufficient strength to withstand the tensile force for pulling out the spout panel is maintained.

According to a sixth aspect of the present invention, a gable roof top is formed on a bottomed body by a paperboard material coated with a thermoplastic resin on the entire front and back surfaces. A foldable spout panel folded under the upper two panels to be formed includes two left and right inner top seal panels, two left and right triangular panels located below the inner top seal panel, and two triangular panels. A central inclined panel positioned therebetween, a longitudinal crease defining the two inner top sealing panels, a horizontal crease defining the inner top sealing panel and the triangular panel, and an oblique crease defining the triangular panel and the central inclined panel; In a paper container having a horizontal crease defining a center inclined panel and a body panel, a spout pad on or near the boundary horizontal crease is provided. A bottom cut portion provided substantially parallel to the boundary horizontal crease on the front panel or the body panel, and upward from both ends of the bottom cut portion to a height near an intersection of the vertical crease, the horizontal crease, and the oblique crease of the spout panel. A substantially U-shaped first half-cut line composed of a pair of side cut portions extending in parallel, and a portion below the open ends of the both-side cut portions in a region surrounded by the first half-cut line. And from the two points determined at a shorter interval than the bottom cut portion, extending upward in the shape of an inverted octagon, and extending upward,
A pair of second half-cut lines extending further upward without intersecting with the first half-cut line and reaching inside of the left and right inner top seal panels, and a pair of side cut portions of the first half-cut line and a pair of side cut portions In which the second half-cut line is symmetrical with respect to the extension of the vertical crease.

According to this paper container, when the paper container is opened, the half-cut line for forming the tension piece is peeled off from the bottom cut portion in the same manner as in the first aspect, and this portion is pinched and pulled forward. Then, the peeling proceeds along the side cut portion of the first half-cut line, and when the peel reaches the open end of the first half-cut line, the second half-cut is performed by the same operation as the first aspect of the present invention. When the wire is transferred to the wire and the tension is further continued, delamination proceeds upward along the pair of second half-cut lines, reaches the upper ends of the pair of second half-cut lines that are widened, and stops.

As described above, delamination is performed.
In the process of delamination, the sealing portion between the inner surface of the inner seal panel and the inner surface of the outer top seal panel is gradually peeled off by the pulling force of the pulling piece, with the same effect as in the first aspect of the present invention. Then, when this peeling is transferred from the open end of the first half-cut line to the pair of second half-cut lines, the width of the pair of second half-cut lines is vertical crease, horizontal crease,
The narrowing around the intersection of the diagonal creases causes the tensile force to concentrate on the vicinity of the intersection, thereby facilitating the peeling of the seal between the inner surface of the inner top seal panel and the inner surface of the outer top seal panel near the intersection. And reliably. Then, by further pulling the tension piece, the seal portion between the inner surface of the inner top seal panel and the inner surface of the outer top seal panel is completely peeled off by the same operation as the invention of claim 1, and the spout panel is brought forward. Is pulled out and opened.

According to a seventh aspect of the present invention, the bottom cut portion of the first half-cut line according to the sixth aspect of the invention is provided on the body panel near the boundary horizontal crease.

With this configuration, the bottom cut portion of the first half-cut line is provided on the body panel near the boundary horizontal crease, so that the bottom cut portion is easily lifted and the portion can be easily delaminated. .

According to an eighth aspect of the present invention, each of the pair of second half-cut lines according to the sixth or seventh aspect of the present invention has a structure in which the lower end or the upper end of each of the pair of second half-cut lines is provided with shredder preventing means.

With this configuration, the shred prevention means is provided at the lower end or the lower end and the upper end of each of the pair of second half-cut lines, so that delamination reaches the lower end or the upper end of the second half-cut line, and the second half-cut line is pulled to the same portion. Even if a force is applied, since tearing of the part where the half-cut line is not applied is prevented by the shredding prevention means, there is no possibility that the tensile piece formed by the delamination will be shredded from the part, Sufficient strength to withstand the tensile force for pulling out the spout panel is maintained.

[0029]

1 and 2 show an example of an embodiment of a paper container according to the present invention. Paper container 1 of this example
Is formed by molding a paperboard material coated with a thermoplastic resin on the front and back surfaces.The lower part of the rectangular tubular body is closed flat and the bottom is closed, and the liquid, such as a beverage, which is a content, is contained therein. And a so-called gable-top type paper container formed by sealing the upper part with a gable roof type after filling with.

The spout panel 3 which forms a foldable spout which is folded under the two upper panels 2 which form the gable roof-type top, comprises two left and right inner top seal panels 4.
a, 4b, two triangular panels 5a, 5b located on the left and right below the inner top seal panels 4a, 4b, and
Center inclined panel 6 located between the two triangular panels 5a, 5b, and the two inner top sealing panels 4a, 4b.
Vertical crease 7 and inner top sealing panel 4a,
Lateral creases 8 defining the triangle 4b and the triangular panels 5a, 5b
a, 8b, triangular panels 5a, 5b and centrally inclined panel 6
And the boundary horizontal creases 11 that define the center inclined panel 6 and the body panel 10.

In the paper container 1, a bottom cut portion 12 provided near a boundary lateral crease 11 and provided substantially in parallel with the boundary lateral crease 11 on a body panel 10 in contact with the spout panel 3; It extends upward from both ends of the cut portion 12 to near the height of the intersection 20 of the vertical crease 7, the horizontal creases 8a, 8b, and the oblique creases 9a, 9b of the spout panel 3, and the upper end rides on the oblique creases 9a, 9b. A pair of side cuts 13 whose upper ends are narrower than both ends of the bottom cuts 12 in the 20 direction.
a, 13b, a substantially U-shaped first half-cut line 1
4 and two points below the open ends of the cut portions 13a and 13b in the region surrounded by the first half cut line 14 and diverging upward from each other, and extend upward to form the first half cut line. A pair of second half-cut lines 15a, 15b extending further upward without intersecting with each other and reaching the inside of the left and right inner top sealing panels 4a, 4b;
A pair of side cut portions 13 of the first half cut line 14
a, 13b and a pair of second half-cut lines 15a, 15b
However, a half-cut line 16 for forming a tension piece is provided so as to be symmetrical with respect to the extension line 7a of the vertical crease line 7.

The upper and lower ends of the second half cut lines 15a and 15b are provided with shredding preventing means 17. In this example, a horizontal linear embossing is employed as the shredder preventing means 17, but the invention is not limited to this.

Next, opening of the paper container 1 will be described. After the paper container 1 is filled with a liquid such as a beverage, the spout panel 3 is folded, and the inner top seal panels 4a and 4b of the folded spout panel 3 and the outer top seal panels 18a and 18b of the upper panel 2 are folded. The inner surface is sealed to seal the upper opening, and the inner surfaces of the outer top seal panels 18a and 18b and the inner top seal panels 4a and 4b facing each other are sealed to form a gable roof type top. To open the spout panel 3, first, the right and left triangular panels 5a and 5b of the spout panel 3 are spread right and left to peel off the outer top seal panels 18a and 18b and the inner top seal panels 4a and 4b. Are opened so as to form a substantially square surface (the state of FIG. 1).

Next, the half-cut line 16 for forming the tensile piece is formed.
Is delaminated from the bottom cut portion 12, and this portion is pinched with a finger and pulled toward the user. At this time, the bottom cut portion 12 is attached to the body panel 10 which is in contact with the spout panel 3 by the boundary lateral crease 1.
1 (slightly below), the paper container 1
Is assembled and the boundary side crease 11 is mountain-folded, so that the bottom cut portion 12 slightly lifts up,
With this as a trigger, the bottom cut portion 12 can be easily peeled off. By pulling the peeled portion forward, delamination proceeds along the side cut portions 13a and 13b, and the portion surrounded by the substantially U-shaped first half-cut line 14 peels and is pulled. 19 are formed (FIG. 2).

When the separation reaches the open end of the first half-cut line 14, the separation starts from the open end.
A pair of second half-cut lines 15 in the area surrounded by
a, 15b, and the second half cut line 15a,
Delamination proceeds along 15b. At this time, the side cut portions 13a and 13b of the first half cut line 14 and the second
Although the half-cut lines 15a, 15b are provided with a sharp change in angle, both open ends of the first half-cut line 14 are not connected to the second half-cut lines 15a, 15b, so the first half-cut lines 15a, 15b are not connected. Even if there is variation in the peeling force and direction from both open ends of the half-cut line 14 to the second half-cut lines 15a and 15b, according to the force and direction of peeling from both open ends of the first half-cut line 14. The peeling is transferred to the second half-cut lines 15a and 15b along a path that is not always constant, and in addition to the fact that the second half-cut lines 15a and 15b are located on the tension side. The separation of the first half-cut line 14 from both open ends is not in a fixed direction, but the second half-cut line 15a, 15b is reliably transferred along a reasonable path.

When the tension is further continued, delamination proceeds along the pair of second half-cut lines 15a, 15b, and the upward separation is divergent at the upper ends of the two second half-cut lines 15a, 15b. Reached and locked,
On the other hand, the downward peeling reaches the lower end and stops.

The second half cut line 15a,
Since the shredding preventing means 17 is provided on the upper and lower ends of 15b, sufficient strength to withstand the tensile force for pulling out the spout panel 3 is maintained, and even when the tensile force is applied, the half cut is performed from the same portion. The second half-cut line 15a. Breakage from the upper and lower ends of 15b is prevented.

As described above, delamination is performed.
In the process of delamination, a force is applied in the peeling direction to the seal portions between the inner surfaces of the inner top seal panels 4a and 4b and the inner surfaces of the outer top seal panels 18a and 18b of the upper panel 2 due to the pulling of the tension pieces 19. As the layer is gradually peeled off and the interlayer peeling of the portion surrounded by the tension piece forming half-cut line 16 approaches the transfer position of the second half-cut line 15a, 15b from the open end of the first half-cut line 14, The peel width is vertical crease 7, horizontal crease 8a, 8b,
Since the area around the intersection 20 of the oblique creases 9a and 9b becomes narrower at the center, the tensile force is concentrated on the vicinity of the intersection 20. As a result, the inner and outer top seal panels 4a and 4b near the intersection 20 are drawn. 18
a. The peeling of the seal portion on the inner surface 18b can be easily and reliably performed.

When the delamination reaches the second half-cut lines 15a, 15b, the inner surfaces of the inner top seal panels 4a, 4b and the outer top seal panels 18a, 18a,
Part or most of the seal portion on the inner surface of the inner surface 18b is peeled off, and the tension pieces 19 formed by the delamination are further pulled, so that the inner surfaces of the inner top seal panels 4a and 4b and the inner surfaces of the outer top seal panels 18a and 18b are separated. The seal part is completely peeled off, and the spout panel 3 is pulled out and opened.

The delamination is caused by the second half cut line 15
When the tension piece 19 is further pulled from the time when it reaches the upper end of the pair of second half-cut lines 15a, 15b,
Since 15b gradually expands in the shape of an inverted octagon toward the upper side, there is no danger that the tension piece 19 will be cut off from the upper ends of the second half-cut lines 15a and 15b by the tensile force. Lines 15a, 15b
The shredder prevention means 17 is provided at the upper end of the
Breakage from the upper ends of the half-cut lines 15a and 15b can be more reliably prevented, and sufficient strength to withstand the tensile force for pulling out the spout panel 3 is maintained.

In this embodiment, the second half cut line 15
Although the shredding prevention means 17 is provided on each of the upper and lower ends of a and 15b, only the lower end may be provided.

FIGS. 3 to 5 show other examples of the embodiment of the present invention. The embodiment shown in FIG. 3 is different from the embodiment shown in FIG.
15b are the side cut portions 13a, 13b in the region surrounded by the first half cut line 14;
Extending substantially parallel to each other from two points below the open end, extending further upward without intersecting with the first half-cut line 14, and gradually diverging in an inverted octagon upward above the line connecting the open ends. And are provided so as to reach inside the left and right inner top sealing panels.

According to this configuration, the first half cut line 1
4 and the angle between the portions of the second half-cut lines 15a and 15b extending in parallel with each other is small, and the peeling of the first half-cut line 14 from both open ends is inconsistent with the first half-cut line 14. The second half-cut line 15a whose angle changes slowly,
15b, the tensile force acts in the extending direction of the parallel portions of the second half-cut lines 15a and 15b, and the second half-cut line 1
Delamination upward along 5a and 15b can be made easier.

The embodiment shown in FIG. 4 is different from the embodiment shown in FIG. 3 in that the pair of second half-cut lines 15a, 15b
Are in a region surrounded by the first half cut line 14,
The parallel half-cut line portions 115b and 115d extending upward from two points below the open ends of the both-side cut portions 13a and 13b substantially in parallel with each other without intersecting with the first half-cut line 14; Half cut line 1
In the region surrounded by 15b and 115d, the divergent half-cut line portions 115a and 115c extend in an inverted octagonal shape and extend upward from two points below the upper ends of the parallel half-cut line portions 115b and 115d. Has become.

According to this configuration, the parallel half cut line portions 115b, 115b of the pair of second half cut lines 15a, 15b
When the peeling of the portion surrounded by 115d reaches the upper ends of the parallel half-cut line portions 115b and 115d, the peeling is performed from the upper end by a pair of divergent half-cut line portions 115a and 115c.
And the delamination proceeds along the divergent half-cut line portion. At this time, the parallel half-cut line portion 11
5b, 115d and a divergent half-cut line portion 115a,
Even if it is provided with an abrupt change in angle, the upper half of the parallel half-cut line portions 115b and 115d and the divergent half-cut line portions 115a and 115c are not connected by half-cut, so that the parallel half-cut line portions 115b and 115c are not connected. Even if there is a variation in the peeling force or direction from the upper ends of the cut line portions 115b and 115d toward the half cut line portions 115a and 115c, the parallel half cut line portions 115b and 1
In accordance with the force and direction of the peeling from the upper end of 15d, the peeling is transferred to the divergent half-cut line portions 115a and 115c along a path that is not always constant, and further the divergent half-cut line portions 115a and 115c. Is located on the pulling direction side, the peeling from the upper ends of the parallel half-cut line portions 115b and 115d is not in a fixed direction but follows a reasonable path without fail and the divergent half-cut line portion 115a, 115c.

In the embodiment shown in FIG. 5, the pair of side cut portions 13a and 13b of the first half cut line 14 are substantially parallel to a position at a height slightly exceeding the horizontal creases 8a and 8b of the spout panel 3. Extending. Also, a pair of second
The lower ends of the half-cut lines 15a and 15b have the first ends.
In the region surrounded by the half-cut line 14, below the open ends of the side cut portions 13a, 13b, at a shorter interval than the bottom cut portion 12, and on the oblique creases 9a, 9b, these two points are obtained. From each other, extend upward in the shape of an inverted octagon, and extend upward without intersecting with the first half-cut line 14 to reach the inside of the left and right inner top seal panels 4a, 4b.

According to this example, similarly to the embodiment shown in FIG. 1, when the delamination is performed from the bottom cut portion 12 of the half-cut line 16 for forming a tensile piece, the portion is pinched and pulled forward.
Side cut portions 13a, 13b of the first half cut line 14
Along the first half-cut line 1
When reaching the open end of No. 4, it is transferred to the second half-cut lines 15a and 15b by the same operation as the embodiment shown in FIG.

When the tension is further continued, the delamination proceeds along the pair of second half-cut lines 15a and 15b, and the upward delamination ends at the upper ends of the two second half-cut lines 15a and 15b. Reached and locked,
On the other hand, the downward peeling reaches the lower end and stops.
Since the lower ends of the second half-cut lines 15a and 15b are on the oblique creases 9a and 9b, even if a tensile force is applied to the lower ends of the second half-cut lines 15a and 15b, the first half cut is performed from the same part. The tearing of the portions that have not been done is prevented by the oblique creases 9a, 9b, and it is possible to prevent the second half cut lines 15a, 15b from being cut off from the lower ends.

As described above, delamination is performed.
During the delamination process, the tensile force of the tensile piece 19 causes
By the same operation as the embodiment of FIG.
The seal portions between the inner surfaces of the a and 4b and the inner surfaces of the outer top seal panels 18a and 18b gradually peel off. When this peeling is transferred from the open end of the first half-cut line 14 to the pair of second half-cut lines 15a, 15b, the pair of second half-cut lines 15a, 15b
Since the widths of the half-cut lines 15a and 15b are narrowed around the intersection 20, the tensile force concentrates on the vicinity of the intersection 20. The seal portions on the inner surfaces of the outer top seal panels 18a and 18b can be easily and reliably peeled off.

Then, by further pulling the pulling piece 19, the sealing portion between the inner surfaces of the inner top sealing panels 4a, 4b and the inner surfaces of the outer top sealing panels 18a, 18b is completely formed by the same operation as in the embodiment of FIG. Peeled off
Then, the spout panel 3 is pulled out and opened.

In this example, the second half cut line 15
Although the oblique crease lines 9a and 9b are used at the lower ends of a and 15b as shredding prevention means, it goes without saying that shredding prevention means similar to the embodiment of FIG. 1 may be applied.

[0052]

As described above, according to the paper container of the present invention, a folding piece spout is formed by pulling a tension piece formed by delamination from a tension piece forming half cut line provided on a spout panel. Can be opened, so that the opening operation can be performed hygienically and easily and reliably. Moreover, the half-cut processing can be performed during the conventional manufacturing process of the paper container blanks, and can be easily and inexpensively performed.

In the half-cut line for forming the tension piece, the width becomes narrower around the intersection of the vertical crease, the horizontal crease and the oblique crease, so that the tensile force for peeling off this portion is obtained. Is concentrated around the intersection, so that the seals on the inner surface of the inner top seal panel and the inner surface of the outer top seal panel can be easily and reliably peeled off.

The angle between the first half-cut line and the narrow second half-cut line constituting the tension-piece forming half-cut line is provided with a sharp change in the angle. Since the open end of the cut line and the second half cut line are not connected by half cut, the separation of the first half cut line can be reliably transferred to the second half cut line.

Further, the half-cut line for forming the tension piece is covered with a gable roof formed on the top in a state where the paper container is sealed, so that the half-cut line is not peeled off during handling of the paper container. Absent.

[Brief description of the drawings]

FIG. 1 is a front view of a spout panel showing an example of an embodiment of a paper container according to the present invention.

FIG. 2 is an explanatory view showing an operation of opening the paper container of FIG. 1;

FIG. 3 is a front view of a spout panel showing another example of the embodiment of the paper container according to the present invention.

FIG. 4 is a front view of a spout panel showing another example of the embodiment of the paper container according to the present invention.

FIG. 5 is a front view of a spout panel showing another example of the embodiment of the paper container according to the present invention.

FIG. 6 is an explanatory view showing a conventional opening method.

FIG. 7 is a perspective view of a conventional paper container provided with a tension piece.

FIG. 8 is a perspective view of another conventional paper container provided with a tension piece.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper container 2 Upper panel 3 Spout panel 4a, 4b Inner top sealing panel 5a, 5b Triangular panel 6 Central inclined panel 7 Vertical crease 7a Extension 8a, 8b Horizontal crease 9a, 9b Diagonal crease 10 Body panel 11 Boundary horizontal crease 12 Bottom cut part 13a, 13b Side cut part 14 First half cut line 15a, 15b Second half cut line 16 Half cut line for forming tension piece 17 Shredding prevention means 18a, 18b Outer top seal panel 19 Tensile piece 20 Intersection 115a Spread end Half cut line part 115b Parallel half cut line part 115c Divergent half cut line part 115d Parallel half cut line part

Claims (8)

[Claims] 1. An upper two sheets formed of a paperboard material coated with a thermoplastic resin on the entire front and back surfaces so that a gable roof type top is formed on a bottomed body, and the gable roof type top is formed. Folding spout panel folded beneath the panel is provided with two left and right inner top seal panels, two right and left triangular panels located below the inner top seal panel, and a central slope located between the triangular panels. A panel, a longitudinal crease defining the two inner top seal panels, a horizontal crease defining the inner top seal panel and a triangular panel, a diagonal crease defining a triangular panel and a centrally inclined panel, and a torso. In a paper container having a border horizontal crease defining a panel, a spout panel or a trunk panel on or near the border horizontal crease is provided. A bottom cut portion provided substantially in parallel with the boundary horizontal crease, and a vertical crease, a horizontal crease, and an open end at an upper end of the spout panel extend upward from both ends of the bottom cut portion to a height near an intersection of the oblique creases. A substantially U-shaped first half cut line comprising a pair of side cut portions narrower than both ends of the bottom cut portion, and opening of the both side cut portions in a region surrounded by the first half cut line. It consists of a pair of second half-cut lines that extend upward from two points below the end and extend upward without crossing the first half-cut line and reach inside the left and right inner top seal panels. A pair of side cut portions of the first half-cut line and a pair of second half-cut lines are formed to be bilaterally symmetric with respect to the extension of the vertical crease, and Paper container characterized in that digit. 2. The pair of second half-cut lines extend substantially parallel to each other from two points below an open end of the both-side cut portions in a region surrounded by the first half-cut line, It is provided so as to extend further upward without intersecting with the first half-cut line, gradually expand in an inverted octagon upwardly from the line connecting the open ends, and reach inside the left and right inner top seal panels. The paper container according to claim 1, wherein: 3. The first half-cut line, wherein the pair of second half-cut lines extend from two points below the open ends of the cut portions on both sides in a region surrounded by the first half-cut line. And a parallel half-cut line portion extending upward substantially in parallel with each other without crossing, and in a region surrounded by the parallel half-cut line portion, mutually opposite from two points below the upper end of the parallel half-cut line portion. 3. The paper container according to claim 2, wherein the paper container comprises a half-cut line portion that expands in an octagonal shape and extends upward. 4. The paper container according to claim 1, wherein a bottom cut portion of the first half cut line is provided on a body panel near a boundary lateral crease. 5. The paper container according to claim 1, wherein the lower end or the upper end of each of the pair of second half-cut lines is provided with a shred prevention unit. 6. An upper two sheets formed of a paperboard material coated with a thermoplastic resin on the entire front and back surfaces so that a gable roof-type top is formed on a bottomed body, and the gable roof-type top is formed. Folding spout panel folded beneath the panel is provided with two left and right inner top seal panels, two right and left triangular panels located below the inner top seal panel, and a central slope located between the triangular panels. A panel, a longitudinal crease defining the two inner top seal panels, a horizontal crease defining the inner top seal panel and a triangular panel, a diagonal crease defining a triangular panel and a centrally inclined panel, and a torso. In a paper container having a border horizontal crease defining a panel, a spout panel or a trunk panel on or near the border horizontal crease is provided. A bottom cut portion provided substantially in parallel with the boundary horizontal crease, and a pair of the vertical spouts, the horizontal crease, and the pair of the spout panels extending substantially parallel to near the height of the intersection of the oblique creases upward from both ends of the bottom cut portion. A substantially U-shaped first half-cut line composed of a side cut portion, and an area surrounded by the first half-cut line, below the open ends of the both-side cut portions and from the bottom cut portion. A pair of second halves extending from two points determined at a short interval, diverging from each other and extending upward, further extending upward without intersecting with the first half cut line, and reaching the inside of the left and right inner top sealing panels. A tension piece forming cuff comprising a cut line, wherein a pair of side cut portions of the first half cut line and a pair of second half cut lines are bilaterally symmetric with respect to an extension of the vertical crease. Paper container characterized in that a Fukatto line. 7. The paper container according to claim 6, wherein a bottom cut portion of the first half cut line is provided on a body panel near a boundary lateral crease. 8. The paper container according to claim 6, wherein a shredder preventing means is provided at a lower end or an upper end of each of the pair of second half-cut lines.