JP2002255161A - Paper container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a paper container the peeling tab of whose peeling piece can be held easily for easily opening its straw insertion hole. SOLUTION: In structuring a straw insertion hole 24, a first half cut 25 forming the straw insertion hole 24 is provided from the back face of a top face panel 15, and a second half cut 26 surrounding the half cut 25 is provided from the front face of the panel 15 structuring a top 6 existing on the top of a body 5 with a bottom. The hole 24 is opened by separating a part surrounded by the half cut 26 from the front face between paper layers. A peeling tab 29 for starting the separation of a peeling piece 27 formed by the half cut 26 is made of a protrusive piece 28 projecting beyond the side seal 12 of the panel 15. On both sides of the piece 28, the half cut 26 is formed in a connected manner, and on the back face of the panel 15 a third half cut 30 crossing the base of the piece 28 is provided near the outside end edge of the side seal 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper container for storing a liquid such as milk or juice, wherein a straw insertion hole is opened when a portion surrounded by a half cut formed on the top is peeled off from the paper layer. Related to paper containers.

[0002]

2. Description of the Related Art As shown in FIGS. 11 and 12, there is a top portion 35 composed of a pair of top panels 33 and a pair of folded side panels 34 located between the top panels 33. The top panel 33 is provided with a first half cut 36 serving as a straw insertion hole from the back surface, and the first half cut 3 is formed from the front surface.
A paper container provided with a straw insertion hole forming structure in which a second half cut 37 is provided so as to surround 6 and a portion surrounded by the second half cut 37 is separated from the surface of the paper layer to open a straw insertion hole. 38 are known.

[0003] In the paper container 38, the second half cut 37 constituting the straw insertion hole forming structure is provided with a peeling margin 40 which becomes a clue of the peeling piece 39 formed by the second half cut 37. The tip is the top panel 3
3 and the boundary curve 42 between the torso panel 41 connected thereto
Or it is formed so as to be located near the boundary curve 42. This is because, in the step of molding the paper container 38, by bending the portion of the boundary folding curve 42, the leading end of the peeling allowance 40 serving as a clue for peeling of the peeling piece 39 formed by the second half cut 37 is formed. This is to make it easy to pick up the peeling allowance 40 of the peeling piece 39 at the time of opening the straw insertion hole by peeling and floating.

[0004]

However, in the paper container 38 provided with the straw insertion hole forming structure, the separation piece 39 formed also by the second half cut 37 by bending the boundary folding curve 42 is used. In some cases, the leading end of the peeling margin 40, which serves as a clue for peeling, does not peel or is not sufficiently peeled, and the leading end of the peeling margin 40 may not float.
There is a problem that it is difficult to remove the stripping margin 40 and it may be difficult to open the straw insertion hole.

It is an object of the present invention to provide a first half cut as a straw insertion hole from the back surface of the top, a second half cut from the front so as to surround the first half cut, and the second half cut from the front. (2) To provide a paper container in which a straw insertion hole is easily opened by peeling off a portion surrounded by half-cut between paper layers and a straw insertion hole is easily picked, and a straw insertion hole is easily opened. is there.

[0006]

Means for Solving the Problems In order to achieve the above object, the invention according to claim 1 is provided on a bottomed body portion by a paperboard substrate coated with a thermoplastic resin on the entire front and back surfaces. ,
A pair of top panels and a pair of folded side panels located between the top panels are formed so as to have a top portion, and a straw is inserted into the top panel from the back surface thereof. A first half cut serving as a hole is provided, and a second half cut is formed from the surface so as to surround the first half cut.
A paper container having a straw insertion hole forming structure in which a half cut is provided, and a portion surrounded by the second half cut is separated from the surface of the paper layer so as to open a straw insertion hole, formed by the second half cut. A peeling margin serving as a clue for peeling of the peeled piece to be formed is constituted by a projecting piece consisting of a part of the top panel projecting beyond the side seal portion of the top panel, and the second piece is provided on both sides of the projecting piece.
Half cuts are formed so as to be continuous, and a third half cut is provided on the back surface of the top panel on the side seal portion or near the outer edge of the side seal portion so as to cross the base of the projecting piece. Features.

[0007] With this configuration, the peeling margin, which is a clue for peeling of the peeling piece, protrudes beyond the side seal portion of the top panel, and the peeling margin is the entire thickness of the top panel. When opening the straw insertion hole, the peeling amount of the peeling piece is easy to pick, and when the peeling amount is picked and pulled up,
The peeling piece starts to peel off from the third half cut that crosses the base of the peeling allowance provided on the side seal portion or near the outer edge of the side seal portion, and thereafter peels off along the second half cut, so that it is weakened Causing paper delamination,
The straw insertion hole can be easily opened.

According to a second aspect of the present invention, when the third half cut according to the first aspect is provided on the side seal portion, the third half cut is formed in the side seal portion.
The portion corresponding to the peeling margin on the tip side of the half cut is in a non-adhesion state or a weak adhesion state.

[0009] With such a configuration, the removal allowance of the peeling piece is set to the third.
It can be easily pulled up to a half cut with a weak force.

According to a third aspect of the present invention, a pair of top panels are provided between a pair of top panels on a bottomed body by a paperboard base material coated with a thermoplastic resin on the entire front and back surfaces. The top panel is formed so as to have a top portion formed of a pair of side panels that are folded, and the top panel is provided with a first half cut that serves as a straw insertion hole from the back surface. A second half cut is provided so as to surround the first half cut, and a straw insertion hole forming structure is provided in which a straw insertion hole is opened by peeling a portion surrounded by the second half cut from the surface of the paper layer. In the paper container, the peeling margin serving as a clue for peeling of the peeling piece formed by the second half cut is formed such that the tip is located at the end of the side seal portion of the top panel. A third half cut is formed on both sides thereof so as to be continuous with the second half cut, and a third half cut is provided on the side seal portion on the back surface of the top panel so as to cross the peeling allowance base. The cut forming the part of the peeling margin on the distal end side is a full cut, and further corresponds to the peeling margin formed by the full cut on the distal end side than the third half cut in the side seal portion. The portion is in a non-adhesion state or a weak adhesion state.

[0011] With this configuration, since the cut forming the part of the peeling margin on the tip side from the third half cut is a full cut, the peeling margin is the entire thickness of the top panel, and The third in the seal portion
Since the part corresponding to the peeling margin formed by the full cut on the tip side than the half cut is in the non-adhered state or weakly adhered state, when opening the straw insertion hole, the tip of the peeling margin should be By hooking with a nail or the like, the peeling margin at the tip end side than the third half cut can be easily pulled up with a weak force. In the vicinity of the outer edge of the seal, peeling starts from the third half cut that crosses the base of the peeling allowance, and thereafter peels off along the second half cut. Can be opened.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 6 show a first embodiment of a paper container according to the present invention. FIG. 1 is a partially omitted perspective view of a paper container 1 of the present embodiment, and FIG. 3 is an enlarged sectional view taken along line BB of FIG. 1, FIG. 4 is a developed view of the paper container 1 shown in FIG. 1, FIG. 5 is an enlarged view of a portion X in FIG. 4, and FIG. FIG. 3 is a perspective view showing a state where a straw insertion hole of the paper container 1 is opened.

The paper container 1 shown in FIG. 1 is formed by a paperboard base material 3 having a thermoplastic resin 2 coated on the front and back surfaces formed in a developed shape shown in FIG. The material 3 has a longitudinal boundary curve 4 in its developed shape.
, A first panel 8, a second panel 9, a third panel 10, which form the body 5, top 6, and bottom 7 of the paper container 1 through
Side seal portion 12 formed on the back surface (inner surface of paper container 1) of the side edge of fourth panel 11 and first panel 8
The seal panel 13 to be sealed is connected. The first panel 8, the second panel 9, the third panel 1
0, the fourth panel 11 has a first top panel 15, a first side panel 16, a second
A top panel 17 and a second side panel 18 are formed in this order, and a first bottom panel 20, a second bottom panel 21, and a third bottom panel 21 are formed at a lower portion through a boundary curve 19. 22, a fourth bottom panel 23 are formed in order.

The paper container 1 of this embodiment has a seal connected to a fourth panel 11 on a side seal portion 12 formed on a side edge of the first panel 8 of the paperboard base material 3 formed in the developed shape. The panel 13 is sealed to form a square tubular body 5,
The first, second, third, and fourth bottom panels 20, 21,
22 and 23 are folded and the lower part of the body 5 is closed flat to form the bottom 7, and after filling the body 5 with a liquid such as a beverage, the first top panel 15 and the second The first side panel 16 and the second side panel 18 between the top panel 17 and the second side panel 18 are respectively folded outward.
The first top panel 15, the second top panel 17, and the first
Is a flat top type paper container in which the top panel 6 is formed flat by sealing the side panel 16 and the second side panel 18.

First Top Panel 1 Constituting Top 6
5, among the second top panel 17, the first side panel 16, and the second side panel 18, the side seal portion 12 is provided on the side edge.
The first top panel 15 having a first half cut 25 is provided from the rear surface thereof as a straw insertion hole 24, and a second half cut 26 is provided from the front surface so as to surround the first half cut 25. The portion surrounded by the second half cut 26 is used as a peeling piece 27, and the straw inserting hole 24 is opened by peeling the peeling piece 27 between paper layers.

Further, the first top panel 15 is formed with a protruding piece 28 protruding beyond the side seal portion 12 on a side edge thereof, and is formed by the second half cut 26 with the protruding piece 28. The second half cut 26 is formed so as to be continuous on both sides of the projecting piece 28 as a peeling margin 29 serving as a clue for the peeling of the peeling piece 27 to be performed.

After the paper container 1 is formed, the protruding piece 28 constituting the peeling allowance 29 of the peeling piece 27 exists in a state protruding outward from the vertical body 5 of the paper container 1.
The length of the protrusion is not particularly limited, and can be set arbitrarily in consideration of picking up or raising the peeling allowance 29.

Further, a third half cut 30 which crosses the base of the projecting piece 28 is provided on the back surface of the first top panel 15 near the outer edge of the side seal portion 12 (see FIG. 3). . The straight line of the third half cut 30 is preferably a straight line, but is not particularly limited.
It may be a curved line, a wedge line, or any line including these.

Each of the first half cut 25, the second half cut 26, and the third half cut 30 is
To the paper layer 31. The shape of the peeling piece 27 formed by the second half cut 26 is substantially U-shaped in the drawing showing this example, but the C-shape, V-shape or any combination of a circular shape and an elliptical shape is preferable. The shape may be any combination of a substantially U-shape, a straight line, and a wavy line. Various shapes other than these may be used, and there is no need to be left-right symmetric.

According to the paper container 1 configured as described above, the stripping margin 29 serving as a clue for the peeling of the peeling piece 27 is used as the protruding piece 28 to form the side seal portion 12 of the first top panel 15.
, Which protrudes outward from the body portion 5 of the paper container 1, and has a stripping margin 29 formed by the protruding piece 28, and a portion on the tip side from the third half cut 30 is formed of the first top panel 15. Because of the full thickness, the straw insertion hole 24
At the time of opening, the peeling margin 29 of the peeling piece 27 is easy to pick,
When the peeling allowance 29 is picked and pulled up, the peeling piece 27 becomes the third
The paper delamination starts from the half cut 30, and the second
Since the peeling is performed along the half cut 26, the paper interlayer is stably and surely caused by a weak force, and the straw insertion hole 24 can be easily opened.

FIG. 7 shows a second example of the embodiment of the present invention. The paper container 1 shown in FIG. 7 shows the developed shape of the paper container 1 of the first example shown in FIG. Similarly, referring to the drawing, a paper container of a gable roof type (gebel top type) in which the top portion 6 is formed by folding the first side panel 16 and the second side panel 18 inward, respectively.

In this embodiment, as in the case of the first embodiment, the first top panel 15 has a straw insertion hole 24 from the back surface of the first top panel 15.
A half cut 25 is provided, and a second half cut 26 is provided from the surface so as to surround the first half cut 25. Further, the side edge of the first top panel 15 extends beyond the side seal portion 12. The second half cut 2
A protruding piece 28 is formed as a stripping margin 29 for the peeling piece 27 formed by 6. Further, on the back surface of the first top panel 15, near the outer edge of the side seal portion 12,
A third half cut 30 is provided across the base of the projection 28.

The first insertion hole 24 for the straw
The position where the half cut 25 is provided is not particularly limited. However, the first top panel 15 and the first and second folded top panels 15 are sunk into the inside of the first top panel 15. The overlapping portion of the side panels 16 and 18 is to be avoided.

The second half cut 26, the projecting piece 28, and the third half cut 30 in this embodiment are not different from those in the first embodiment described above, and the description of the first embodiment is referred to, and the description thereof will be omitted. Also, the operation and effect of this example are the same as those of the first example.

FIG. 8 shows a third example of the embodiment of the present invention. In this example, the third half cut 30 shown in the first and second examples corresponds to the back surface of the first top panel 15. And is provided on the side seal portion 12 so as to cross the base of the projecting piece 28.

In this configuration, in the side seal portion 12, the portion a of the peeling margin 29 on the tip side from the third half cut 30 is sealed with the seal panel 13, but this portion is slight and the peeling margin is small. When the pin 29 is picked up and pulled up, the seal of the portion a can be easily peeled off with a small force, the peeling allowance 29 can be easily pulled up, and the peeling piece 27 can be stably and easily and reliably peeled off. be able to.

In this embodiment, in order to facilitate the lifting of the peeling margin 29, the portion corresponding to the part a of the peeling margin 29 in the side seal portion 12 is set in a non-adhered state or a weakly adhered state. I have. As a means for making such a non-adhesion state or a weak adhesion state, a release agent is applied to the back surface of the first top panel 15 which is the part a of the peeling allowance 29 or the part to be bonded on the surface of the seal panel 13 opposed thereto. The heat of the part is sufficiently reduced at the time of sealing or sealing.

FIGS. 9 and 10 show a fourth embodiment of the present invention.
An example is shown, and a paper container 1 shown in the figure is a flat top type paper container whose developed shape is the same as the developed shape shown in FIG. I do.

In this embodiment, as in the first and second examples, a first half cut 25 is provided from the back surface of the first top panel 15 as a straw insertion hole 24, and the first half cut 25 is provided from the front surface. A second half cut 26 is provided so as to surround the portion 25, and a portion surrounded by the second half cut 26 is a peeling piece 27. The peeling strip 27 has a peeling margin 29 serving as a clue for the peeling, and is formed such that the tip is located at the end of the side seal portion 12 of the first top panel 15 and the peeling margin 29 is formed on both sides thereof. The two half cuts 26 are formed so as to be continuous. Then, a third half cut 30 is formed on the back surface of the first top panel 15 on the side seal portion 12 so as to cross the base of the peeling allowance 29.
Further, a cut forming a portion of the peeling allowance 29 on the distal end side with respect to the third half cut 30 is formed by the full cut 32.

Further, a portion of the side seal portion 12 corresponding to the peeling margin 29 on the tip side from the third half cut 30 is set in a non-adhesion state or a weak adhesion state. As a means for making such a non-adhered state or a weakly-adhered state, a release agent is applied to the back surface of the first top panel 15 serving as the peeling allowance 29 or a portion to be bonded on the surface of the seal panel 13 opposed thereto, or At the time of sealing, the heat of the part is sufficiently reduced.

According to the paper container 1 configured as described above, since the portion of the peeling margin 29 at the tip end side of the third half cut 30 is formed by the full cut 32, the peeling margin 29 is the first margin. The total thickness of the top panel 15 and the third
Since the portion corresponding to the peeling margin 29 formed by the full cut 32 on the tip side of the half cut 30 is in a non-adhered state or a weakly adhered state, when the straw insertion hole 24 is opened, the peeling is performed. By hooking the tip of the margin 29 with a nail or the like, the peeling margin 29 on the tip side of the third half cut 30 can be easily pulled up with a weak force, and the peeling piece 27 can be stably peeled easily and reliably. can do.

In this embodiment, the top 6 of the present invention is a flat-top type paper container 1; however, the present invention can be similarly applied to a gable roof type (gebel top type) paper container. It is.

[0033]

As described above, according to the paper container of the present invention, when the straw insertion hole is opened, the peeling margin of the peeling piece is easily picked up. Peeling starts from the third half cut across the base of the peeling margin provided near the outer edge of the upper seal or the side seal, and thereafter peels off along the second half cut. Delamination occurs, and the straw insertion hole can be easily opened. Moreover, it is possible to obtain a paper container having a straw insertion hole forming structure which can be manufactured at the same cost as the conventional paper container without changing the conventional equipment and process for manufacturing the paper container filled with beverages and the like at all. it can.

[Brief description of the drawings]

FIG. 1 is a partially omitted perspective view showing a first example of an embodiment of a paper container according to the present invention.

FIG. 2 is an enlarged sectional view taken along line AA of FIG. 1;

FIG. 3 is an enlarged sectional view taken along line BB of FIG. 1;

FIG. 4 is a development view of the paper container shown in FIG. 1;

FIG. 5 is an enlarged view of a part X in FIG. 4;

FIG. 6 is a perspective view showing a state in which a straw insertion hole of the paper container of the first example is opened.

FIG. 7 is a partially omitted perspective view showing a second example of the embodiment of the present invention.

FIG. 8 is an enlarged sectional view of a main part showing a third example of the embodiment of the present invention.

FIG. 9 is a partially omitted perspective view showing a fourth example of the embodiment of the present invention.

FIG. 10 is an enlarged sectional view taken along line CC of FIG. 9;

FIG. 11 is a perspective view showing a conventional paper container.

FIG. 12 is a perspective view showing another conventional paper container.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper container 2 Thermoplastic resin 3 Paperboard base material 4 Boundary curve 5 Trunk part 6 Top part 7 Bottom part 8 First panel 9 Second panel 10 Third panel 11 Fourth panel 12 Side seal part 13 Seal panel 14 Boundary curve 15 First top panel 16 First side panel 17 Second top panel 18 Second side panel 19 Boundary curve 20 First bottom panel 21 Second bottom panel 22 Third bottom Panel 23 Fourth bottom panel 24 Straw insertion hole 25 First half cut 26 Second half cut 27 Peeling piece 28 Protrusion piece 29 Peeling allowance 30 Third half cut 31 Paper layer 32 Full cut

Claims (3)

[Claims] 1. A pair of top panels and a pair of folded top panels located between the top panels on a bottomed body by a paperboard base material coated with a thermoplastic resin on the entire front and back surfaces. And a first half cut serving as a straw insertion hole is provided from the back surface of the top panel, and the top panel surrounds the first half cut from the front surface. A paper container provided with a straw insertion hole forming structure in which a second half cut is provided as described above, and a portion enclosed by the second half cut is separated from the surface of the paper layer to open a straw insertion hole. A peeling margin serving as a clue for peeling of the peeling piece formed by the half cut is constituted by a projecting piece consisting of a part of the top panel projecting beyond the side seal portion of the top panel, The second half cut is formed so as to be continuous on both sides, and a third half cut is provided on the back surface of the top panel on the side seal portion or near the outer edge of the side seal portion so as to cross the base of the projecting piece. A paper container characterized by being made. 2. In a case where the third half cut is provided on the side seal portion, a portion of the side seal portion corresponding to a peeling allowance on a distal end side of the third half cut is in a non-adhered state or The paper container according to claim 1, wherein the paper container is in a weakly adhered state. 3. A pair of top panels and a pair of folded top panels located between the top panels on a bottomed body by a paperboard substrate coated with a thermoplastic resin on the entire front and back surfaces. And a first half cut serving as a straw insertion hole is provided from the back surface of the top panel, and the top panel surrounds the first half cut from the front surface. A paper container provided with a straw insertion hole forming structure in which a second half cut is provided as described above, and a portion enclosed by the second half cut is separated from the surface of the paper layer to open a straw insertion hole. A peeling margin which is a clue of the peeling of the peeling piece formed by the half cut is formed so that its tip is located at the end of the side seal portion of the top panel,
A third half cut is formed on both sides thereof so as to be continuous with the second half cut, and a third half cut is provided on the side seal portion on the back surface of the top panel so as to cross the peeling allowance base. The cut forming the part of the peeling margin on the distal end side is a full cut, and further corresponds to the peeling margin formed by the full cut on the distal end side than the third half cut in the side seal portion. A paper container characterized in that a part is in a non-adhered state or a weakly-adhered state.