JP2016166025A - Paper container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper container which can easily open a spout, does not require a troublesome operation upon manufacturing and suppresses deformation of flexure or the like.SOLUTION: A square cylindrical barrel part 6 is formed by dividing one side gable wall forming panel 18 turned to a spout 35, an inner top seal panel 22 provided on an upper part of the gable wall forming panel 18, a barrel part panel 4 provided successively to an upper end of the gable wall forming panel 18 and an inner bottom part panel 33 provided successively to a lower end of the barrel part panel 4 on center positions of surfaces thereof in longitudinal directions into two, folding respective longitudinal direction seal panels 5, 5 provided successively on division edges of division pieces 36 of the divided gable wall forming panels 18, 18, the inner top seal panels 22, 22, the barrel part panels 4, 4 and the inner bottom part panels 33, 33 to the outer side and performing superposition and heating seal such that the inner surfaces face each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a paper container having a gabled roof top that contains a liquid beverage such as milk or juice.

  Conventionally, as a paper container for beverages typified by milk cartons, it is made of a paperboard material with thermoplastic resin laminated on the front and back surfaces, and has four body panels, and a rectangular cylindrical body is formed by a vertical seal panel. A pair of gable roof forming panels having an outer top seal panel at the upper part through the top horizontal fold line at the upper end of the trunk panel, and an inner top seal panel at the upper part through the top horizontal fold line. A pair of end wall forming panels facing each other are continuously provided, a pair of end wall forming panels are folded between the pair of gable roof forming panels, and each top seal panel is heat-sealed at a predetermined position and sealed. A gable roof type paper container (gable top type) is widely used.

  The opening of the spout of such a gable roof type paper container is performed by peeling off the heat-sealed opposing surfaces of the inner top seal panel on the side of the end wall forming panel serving as the spout and between the pair of gable roof forming panels. The end wall forming panel is pulled out to open the spout, but when pulling out the end wall forming panel, the top seal panel on the inside of the end wall forming panel that serves as the spout is picked and opened. This way of opening is not desirable for hygiene purposes.

  Therefore, as an opening for the spout easily, a margin for bending in a V shape is provided on the outside of the end wall forming panel serving as the spout, and when opening the spout, the margin is picked and pulled. Thus, a paper container in which the end wall forming panel is drawn out and the spout is opened has been proposed (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 3-123823

However, in the paper container described in Patent Document 1, when the pair of gable wall forming panels are folded between the pair of gable roof forming panels, the gable wall forming panel is folded on the gable roof while the V-shaped pulling portion is folded outward. There is a problem in that it has to be folded between the forming panels, which requires troublesome work during manufacturing.
Further, in the paper container described in Patent Document 1, the end wall forming panel is bent in a V shape to form a margin, but when the end wall forming panel is bent in a V shape, the upper side of the end wall forming panel is Since it becomes clogged and shortened, both end portions of the top horizontal fold line on the lower side of the end wall forming panel are pulled inward, bending occurs in the central portion of the top horizontal fold line, and the top horizontal fold line portion on the side serving as the spout is There is a problem that it swells in an arc shape.

  An object of the present invention is to provide a paper container that can easily open a spout and does not require a troublesome operation during manufacturing and suppresses deformation such as bending.

  In order to achieve the above object, the invention described in claim 1 is made of a paperboard material in which a thermoplastic resin is laminated on the front and back surfaces, and includes four body panels, and a rectangular cylindrical body is formed by a longitudinal seal panel. A pair of gable roof forming panels having an outer top seal panel on the top via a top horizontal folding line at the upper end of the trunk panel, and an inner top seal on the top via the top horizontal folding line A pair of facing wall forming panels having a panel are connected to each other, and the pair of facing wall forming panels are folded between the pair of gable roof forming panels. A top portion is formed by being heat-sealed and sealed at a position, and a pair of outer bottom panels opposed to each other via a bottom horizontal folding line and a bottom lateral folding line are formed at the lower end of the body panel. A pair of opposed inner bottom panels are connected to each other, and the pair of outer bottom panels are folded outside the pair of inner bottom panels and heat sealed to form a bottom, and when opened, In the gable roof-type paper container that pulls out the heat-sealed gable wall forming panel and serves as a spout, one gable wall forming panel that is drawn out from between the pair of gable roof-formed panels and serves as a spout An inner top seal panel at the top of the wall forming panel, a trunk panel connected to the upper end of the end wall forming panel, and an inner bottom panel connected to the lower end of the trunk panel at the center of the surface. The vertical seal panel is divided into two in the vertical direction, and the vertical seal panels are connected to the split edges of the divided pieces of the divided end wall forming panel, inner top seal panel, trunk panel, and inner bottom panel, respectively. Each longitudinal seal panel are overlapped so is by inner surfaces folded outwardly facing, is heat sealed, characterized in that the tubular body of the square is formed.

  According to a second aspect of the present invention, the heat-sealed seal piece of the longitudinal seal panel according to the first aspect is folded and heat-sealed with the body panel and the inner bottom panel. It is characterized by.

According to the paper container of claim 1, one end wall forming panel that is pulled out between a pair of gable roof forming panels and serves as a spout, an inner top seal panel that is provided at the top of the end wall forming panel, The body panel formed continuously at the upper end of the end wall forming panel, and the inner bottom panel connected to the lower end of the body panel are vertically divided into two at the center of the surface to form a divided end wall Vertical seal panels are connected to the split edges of the panel, inner top seal panel, body panel, and inner bottom panel split pieces, and the vertical seal panels are folded outward so that the inner surfaces face each other. Since it is stacked and heat-sealed to form a square cylindrical body, the end wall forming panel serving as the spout is formed with a seal piece that is heat-sealed by overlapping vertical seal panels ,Opened By pulling pinching the seal member can be easily opened spout is pulled out gable wall forming panel.
In addition, the seal pieces to be picked when opening are formed by folding the vertical seal panels connected to the divided edges of the divided pieces to the outside, and then heat-sealing them so that the inner surfaces face each other. Thus, a paper container in which the spout can be easily opened can be manufactured by a simple method without requiring a troublesome operation at the time of manufacturing.
In addition, the seal pieces that are heat-sealed by overlapping the vertical seal panels that have been divided are used to increase the rigidity of the end wall forming panel, inner top seal panel, trunk panel, and inner bottom panel on the side that serves as the spout. It is possible to improve, and deformation such as bending of the paper container can be suppressed.

  According to the paper container of claim 2, since the seal piece of the heat-sealed longitudinal seal panel is folded and heat-sealed with the body panel and the inner bottom panel, the seal piece is removed from the body panel. It does not protrude, and there is no risk of hindering storage or transportation of the paper container.

It is a perspective view which shows an example of embodiment of the paper container which concerns on this invention. It is a perspective view which shows the state which opened the spout of the paper container shown in FIG. It is an expanded view which shows the carton blanks before the assembly process of the paper container shown in FIG. It is a reference figure which shows the state which grasped the opened paper container.

Hereinafter, an example of an embodiment of a paper container according to the present invention will be described in detail with reference to the drawings.
1 is a perspective view showing the paper container of this example, FIG. 2 is a perspective view showing a state in which the spout of the paper container shown in FIG. 1 is opened, and FIG. 3 is a carton blank before assembly of the paper container shown in FIG. FIG. 4 is a reference view showing a state where the opened paper container is gripped.

The paper container of this example is assembled by carton blanks having the unfolded structure shown in FIG.
The paper container of this example is made of a paperboard material in which a thermoplastic resin is laminated on the front and back surfaces, and includes four body panels 1, 2, 3, and 4. A rectangular cylindrical body 6 is formed by a longitudinal seal panel 5. It is formed.

  A pair of gable roof forming panels 9, 10 facing each other via the top horizontal folding lines 7, 8 are connected to the upper ends of the body panels 1, 3. Outer top seal panels 13, 14 are connected to upper portions of the pair of gable roof forming panels 9, 10 via seal horizontal folding lines 11, 12.

Further, the top horizontal folding lines 15, 16 are provided at the upper ends of the other opposing body panel 2, 4.
A pair of wife wall forming panels 17 and 18 that are opposed to each other are provided in series. Inner top seal panels 21 and 22 are connected to upper portions of the pair of end wall forming panels 17 and 18 via seal horizontal folding lines 19 and 20.

  The pair of end wall forming panels 17 and 18 have seal lateral fold lines 19 and 20 at the boundaries between the top lateral fold lines 15 and 16 at the boundary with the body panels 2 and 4 and the inner top seal panels 21 and 22. Folding lines 23 and 24 are connected to each other, and the pair of end wall forming panels 17 and 18 are folded at the folding lines 23 and 24 to be folded between the pair of gable roof forming panels 9 and 10, and the outer top seal. The panels 13 and 14 and the inner top seal panels 21 and 22 are heated, sealed, and sealed at predetermined positions to form a gable roof type top 25.

  A pair of outer bottom panels 28, 29 facing each other via bottom lateral folding lines 26, 27 are connected to the lower ends of the body panels 1, 3, and the other body panel 2 facing the tubular body 6 in the opposite direction. , 4 are connected to a pair of inner bottom panels 32, 33 facing each other via bottom lateral folding lines 30, 31, and a pair of outer bottom panels 28 outside the pair of inner bottom panels 32, 33. 29 are folded, heat sealed and sealed to form the bottom 34.

  In the present invention, one end wall forming panel 18 that is pulled out from between the pair of gable roof forming panels 9 and 10 to become the spout 35, and the inside that is connected to the end wall forming panel 18 via the seal horizontal folding line 20. The top seal panel 22, the end wall forming panel 18 and the body panel 4 connected through the top horizontal fold line 16, and the inner bottom panel 33 connected through the body panel 4 and the bottom horizontal fold line 31, It is divided into two in the vertical direction at the center position of the surface.

  Vertical seal fold lines 37 and 37 are respectively provided on the divided edges of the divided pieces 36 and 36 of the divided end wall forming panels 18 and 18, the inner top seal panels 22 and 22, the body panel 4 and 4, and the inner bottom panels 33 and 33. The vertical direction seal panels 5 and 5 are provided in series. Each vertical seal panel 5, 5 is folded outward and overlapped so that the inner surfaces face each other, and heat sealed to form a rectangular cylindrical body 6.

  The seal pieces 38 of the heat-sealed vertical seal panels 5 and 5 are heat-sealed so that they are folded and bonded to the body panel 4 and the inner bottom panel 33. The seal piece 38, the end wall forming panel 18, and the inner top seal panel 22 are not heat-sealed so that the seal piece 38 can be picked at the time of opening. In this example, the upper end portions of the divided vertical seal panels 5 and 5 are cut obliquely.

  Further, in this example, opening auxiliary folding lines 39, 39 that greatly open the spout 35 are formed on the body panels 4, 4 and the longitudinal seal panels 5, 5. In this example, the auxiliary opening fold lines 39 and 39 have an inverted trapezoidal shape with the top horizontal fold lines 16 and 16 as the bottom, but are not limited thereto, and are inverted triangular shapes with the top horizontal fold lines 16 and 16 as the bottom. It may be.

  According to the paper container configured as described above, when the spout 35 is opened, the opposed surfaces of the inner top seal panels 22 and 22 on the side of the end wall forming panels 18 and 18 that become the spout 35 are heat-sealed. Is removed, and the end wall forming panels 18 and 18 and the seal piece 38 that are folded between the pair of end roof forming panels 9 and 10 are exposed. At this time, by pulling and pulling the exposed seal piece 38, the end wall forming panels 18, 18 can be pulled out and the spout 35 can be easily opened.

  In this example, the heat-sealed seal pieces 38 of the vertical seal panels 5 and 5 are heat-sealed so that they are folded and bonded to the body panel 4 and the inner bottom panel 33. Does not protrude from the body panel 4, and there is no risk of hindering storage or transportation of the paper container.

  In this example, since the upper end portions of the divided vertical seal panels 5 and 5 are cut obliquely, the inner top seal panels 22 and 22 are overlapped and heat-sealed. Since only a small amount of the sealing piece 38 is sandwiched between the inner top sealing panels 22 and 22 and the bonding surface between the inner top sealing panels 22 and 22 is increased, the necessary sealing strength can be ensured.

  Furthermore, in this example, the body panel 4, 4 and the longitudinal seal panels 5, 5 are formed with auxiliary opening folding lines 39, 39 that greatly open the spout 35, as shown in FIG. After the end wall forming panels 18 and 18 are pulled out and the spout 35 is opened, they are sandwiched from both sides of the top horizontal folding lines 16 and 16 at the corners on both sides of the boundary between the end wall forming panels 18 and 18 and the body panel 4 and 4. When the force is applied in this manner, the body panels 4 and 4 are broken at the opening auxiliary folding lines 39 and 39, and the spout 35 is opened. The spout 35 thus opened has a rhombus shape that is slightly longer in the vertical direction, making it easier to pour the contents.

1, 2, 3, 4 Body panel 5 Vertical seal panel 6 Cylindrical body parts 7, 8, Top horizontal fold line 9, 10 Gable roof forming panel 11, 12 Seal lateral fold line 13, 14 Outside top seal panels 15, 16 Top horizontal folding lines 17, 18 Tail wall forming panels 19, 20 Seal horizontal folding lines 21, 22 Inner top sealing panels 23, 24 Folding lines 25 Top 26, 27 Bottom horizontal folding lines 28, 29 Outer bottom panels 30, 31 Bottom horizontal folding lines 32, 33 inner bottom panel 34 bottom 35 spout 36 split piece 37 seal vertical fold line 38 seal piece 39 auxiliary opening fold line

Claims (2)

It is made of a paperboard material with thermoplastic resin laminated on the front and back surfaces, and it has four barrel panels. A square cylindrical barrel is formed by a longitudinal seal panel, and the top end of the barrel panel is connected with a top horizontal folding line. A pair of gable roof forming panels having an outer top seal panel at the top and facing each other, and a pair of gable wall forming panels having an inner top seal panel at the top and facing each other via a top horizontal folding line. The pair of gable wall forming panels are folded between the pair of gable roof forming panels, and the top seal panels are heat-sealed and sealed at predetermined positions to form a top portion, and the trunk A pair of outer bottom panels opposed to each other via a bottom horizontal fold line and a pair of inner bottom panels opposed to each other via a bottom horizontal fold line are connected to the lower end of the bottom panel. The pair of outer bottom panels are folded and heat-sealed and sealed on the outside of the inner bottom panel, and the bottom-wall-formed panel that is heat-sealed is pulled out as a spout when opened. In the gable roof paper container,
One end wall forming panel drawn out from between the pair of gable roof forming panels and serving as a spout, an inner top seal panel at the top of the end wall forming panel, and connected to the upper end of the end wall forming panel The body panel, the inner bottom panel connected to the lower end of the body panel is divided into two in the vertical direction at the center position of the surface,
The vertical seal panels are connected to the divided edges of the divided pieces of the divided end wall forming panel, inner top seal panel, trunk panel, and inner bottom panel, and the respective vertical seal panels are folded outward. A paper container, characterized in that the rectangular cylindrical body is formed by being overlapped so as to face each other and heat-sealed.   2. The paper container according to claim 1, wherein a seal piece of the heat-sealed vertical seal panel is folded and heat-sealed with the body panel and the inner bottom panel.

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