JP6440241B2 - Paper container - Google Patents

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 represented by a milk carton, it is made of a paperboard material in which thermoplastic resins are laminated on the front and back surfaces, and is provided with four torso panels, and the edges are joined by a vertical seal panel. A cylindrical body is formed, and at the upper end of the body panel, a pair of gable roof forming panels having an outer top seal panel at the top and facing each other, and an inner top seal panel at the top and facing each other. A pair of end wall forming panels that are opened as either spouts are continuously provided, and the pair of end wall forming panels are folded between the pair of gable roof forming panels, and each top seal panel is in a predetermined state. Gable roof type (gable top type) paper containers are widely used that are heated in place, sealed and sealed to form the top.

In general, this type of paper container is often used for a paper container having a large capacity. However, depending on the weight of the contents, there is a risk of causing a so-called swollen body. In order to avoid this, a paperboard material having a large basis weight and a high rigidity is used.
Also, since this type of paper container is handled as if it is gripping the torso, it becomes difficult to hold when the torso swells. In particular, when the surface is condensed immediately after taking out from the refrigerator, there is a risk of slipping and dropping from the hand.

As a paper container that can cope with such a situation, a paper container is disclosed in which four corners of the body part are provided with a surface part by denting the middle in the longitudinal direction of the corner part (see, for example, Patent Document 1).
In the paper container described in Patent Document 1, the body vertical fold lines forming the respective corners of the four corners of the body portion start from one vertical fold line portion from the upper end side, and branch to the left and right after passing through predetermined dimensions. Then, the two parallel vertical fold line portions proceed to the lower side, and the two parallel vertical fold line portions merge before the predetermined dimension from the lower end side so as to be connected to the lower end as one vertical fold line portion. It has a shape in which a recessed surface portion is formed between two parallel vertical folding line portions at each of the four corners of the body portion.

Registered design number 1048262

  In the manufacture of this type of paper container, generally, the carton blanks formed into a cylindrical shape with the edges joined by a vertical seal panel are supplied into the carton basket of the filling machine in a state of being folded flat. Is done. Here, the carton blanks are detachably supported by the support pieces on the lower surfaces of both sides thereof. Below the carton blanks, a picker equipped with a vacuum head that pulls the carton blanks downward from the bottom of the carton basket and a barrel panel located below the carton blanks pulled out in a direction to open in a cylindrical shape. A rising guide portion that rises and a corner support guide portion that receives and holds the corners of the carton blanks that are opened in a cylindrical shape and guides the carton blanks that are opened in a cylindrical shape to a mandrel are arranged. Then, the picker is raised, the vacuum head is attracted to the body panel located below the folded carton blanks, and the picker is lowered. The carton blanks adsorbed to the vacuum head by the lowering of the picker are pulled out from the bottom of the carton basket with both sides thereof being removed from the support piece, and the trunk panel located under the carton blanks is raised by the rising guide part The carton blanks that were folded here open in a cylindrical shape. When the picker is further lowered, the corner portion of the carton blank opened in a cylindrical shape is received by the corner support guide portion, and is held in the cylindrical shape and guided by the mandrel. Thereafter, the bottom of the carton blanks is sealed, and liquid filling and top sealing are performed in the subsequent steps on the filling machine.

However, in the paper container described in Patent Document 1, all of the body vertical fold lines forming the respective corners of the four corners of the body portion start from one vertical fold line portion from the upper end side, and have a predetermined dimension. After that, it branches to the left and right, proceeds to the lower side as two parallel vertical fold line parts, and the two parallel vertical fold line parts merge from the lower end side in front of a predetermined dimension to form one vertical fold line part. The carton blanks formed in a cylindrical shape cannot be folded flat with the surface part being formed. Also, when trying to fold flatly forcibly, the face part formed at the corners on the diagonal line is twisted at both ends of the face part, folded inside the face part, or bulged out of the paper container. It becomes an inappropriate state as a carton blank, such as becoming a surface portion.
Further, even if the carton blanks can be folded flat and supplied into the carton basket of the filling machine, when the carton blanks pulled out by the picker are opened in a cylindrical shape, the surface part is a corner support guide part. Therefore, the corner support guide portion cannot stably support the carton blanks. Therefore, the carton blanks opened in a cylindrical shape cannot be stably sent to the mandrel.

  Therefore, the paper container described in Patent Document 1 cannot be manufactured by a conventional filling machine, and the carton blanks that are folded flat in a state before forming the face portion are formed into a cylindrical shape by the above procedure. After opening, there is a problem in that it has to be manufactured by a laborious work of forming the surface portion separately.

  The objective of this invention is providing the paper container which formed the surface part which made it possible to manufacture with the conventional filling machine in the corner | angular part of a trunk | drum.

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, with vertical edges joined by vertical seal panels. And a pair of gable roof forming panels having an outer top seal panel at the top and facing each other at the upper end of the trunk panel via the top horizontal folding line, and the top horizontal folding line through the top horizontal folding line. A pair of end wall forming panels facing each other and having an inner top seal panel at the top, and the pair of end wall forming panels are folded between the pair of gable roof forming panels, A pair of outer bottom panels facing each other through a bottom horizontal folding line are formed at the lower end of the trunk panel by forming the top by sealing and sealing the sealing panels heated in place, and And a pair of inner bottom panels facing each other via a lateral fold line, and the pair of outer bottom panels are folded and sealed outside the pair of inner bottom panels, thereby sealing the bottom. In the gable roof type paper container to be formed, four corners of four trunk vertical folding lines that are provided between the four trunk panels and form the four corners of the cylindrical trunk are paired. Two trunk vertical fold lines forming two corners on one of the two intersecting diagonal lines connecting the corners intersect the virtual tangent of the adjacent trunk panel and the top lateral fold line. The upper intersection, the lower intersection where the virtual tangent line and the bottom horizontal folding line cross each other is the apex, and from each apex, the virtual tangent is formed at a predetermined angle, and each cylinder is adjacent with a predetermined dimension. Provided on the front panel And line portion is composed of substantially parallel longitudinal fold lines portion provided so as to connect the ends of the oblique fold line portion facing vertically provided on each of the body panel adjacent to the two corners The oblique fold line portion and the substantially parallel vertical fold line portion provided in each of the adjacent trunk panel constituting the trunk vertical fold line at the time of mountain fold of the two trunk vertical fold lines forming the two corners Is formed, and a surface portion surrounded by the oblique fold line portion and the substantially parallel vertical fold line portion is formed, and the surface portions formed at the two corner portions are joined by the vertical seal panel. It is characterized in that it is formed so as not to overlap with the vertical edge joint portion.

The invention according to claim 2 is made of a paperboard material in which thermoplastic resins are laminated on the front and back surfaces, and includes four body panels, and the vertical edges are joined by the vertical seal panels to form a rectangular cylindrical body. A pair of gable roof forming panels having an outer top seal panel on the upper side through a top horizontal fold line at the upper end of the trunk panel and an inner top seal panel on the upper side through the top horizontal fold line. And a pair of gable wall forming panels facing each other are continuously provided, the pair of gable wall forming panels are folded between the pair of gable roof forming panels, and the top seal panels are heated at predetermined positions. A top portion is formed by sealing and sealing, and a pair of outer bottom panels facing each other via a bottom horizontal folding line and a bottom lateral folding line are opposed to each other at the lower end of the body panel A pair of inner bottom panels, and the pair of outer bottom panels are folded outside the pair of inner bottom panels, sealed and sealed to form a bottom roof-type paper. a container, wherein four of the four barrel longitudinal fold line provided between the body portion panels to form four corner portions of the tubular body portion, two diagonals intersecting connecting four corners in the diagonal one of the two barrel longitudinal fold line to form the two corners located on the diagonal torso panel side of the upper intersection virtual tangent of the adjacent body panel and said top transverse fold line to intersect virtual of The neighborhood on the tangent and the neighborhood on the virtual tangent on the body panel side of the lower intersection where the virtual tangent and the bottom horizontal folding line intersect each other are defined as vertices, and each vertex forms a predetermined angle from each vertex. And each of the predetermined dimensions The parallel fold line provided so as to connect the end portions of the diagonally fold line portions provided in the adjacent trunk panel and the diagonally fold line portions opposed to each other in the vertical direction. Each of the two adjacent corner panels forming the trunk vertical folding line when the two vertical folding lines forming the two corners are mountain-folded. The oblique fold line portion and the substantially parallel vertical fold line portion provided in the fold are mountain-folded, and a surface portion surrounded by the mountain-folded diagonal fold line portion and the substantially parallel vertical fold line portion is formed, and is formed at the two corners. The surface portion is formed so as not to overlap a vertical edge joint portion joined by the longitudinal seal panel.

  Invention of Claim 3 is the trunk | drum of the upper intersection which the said virtual tangent of the said adjacent trunk | drum panel and the top horizontal folding line cross, or the trunk | drum of an upper intersection of Claim 1 or 2 The vicinity on the panel side virtual tangent and the lower intersection where the virtual tangent and the bottom horizontal folding line intersect or the vicinity on the body panel side virtual tangent of the lower intersection are defined as vertices, from each vertex, the virtual tangent and each The oblique fold portions provided on the respective adjacent body panels having a predetermined angle and each having a predetermined size have the same angle and the same size across the virtual tangent line. And

According to the paper container according to claim 1, of the four barrel longitudinal fold line provided between the four barrel panels forming the four corners of the tube-shaped body portion, the four corners Two trunk vertical fold lines that form two corners on one of the two intersecting diagonal lines that connect diagonally intersect the virtual tangent line of the adjacent trunk panel and the top lateral fold line The upper intersection and the lower intersection where the virtual tangent and the bottom horizontal folding line intersect each other, and each vertex is adjacent to each other at a predetermined angle and each with a predetermined dimension. It is composed of a diagonal fold line portion provided on the body panel and a substantially parallel vertical fold line portion provided so as to connect ends of the diagonal fold line portions opposed to each other in the vertical direction provided on each adjacent body panel. The two corners are formed with the two corners. The oblique fold line portion and the substantially parallel vertical fold line portion provided in each of the adjacent trunk portion panels constituting the trunk vertical fold line at the time of mountain folding of two trunk vertical fold lines, A surface portion surrounded by a substantially parallel vertical fold line portion is formed so that the surface portion formed at the two corner portions does not overlap with the vertical edge joint portion joined by the longitudinal seal panel. Is formed.
In manufacturing a paper container, first, a carton blank formed by joining the vertical edges with the vertical seal panel into a cylindrical shape, and a trunk vertical fold line composed of the oblique fold line portion and the substantially parallel vertical fold line portion. It is folded flat from the trunk vertical fold line on the other diagonal line not included, and is supplied to the filling machine in this state. Here, when the carton blanks are opened in a cylindrical shape, with this opening operation, the action of mountain folding applied to the trunk panel adjacent to the trunk vertical fold line composed of the oblique fold line part and the substantially parallel vertical fold line part is , The upper intersection where the virtual tangent of the adjacent body panel and the top horizontal folding line intersect, and the lower intersection where the virtual tangent and the bottom horizontal folding line intersect from each vertex to the left and right oblique folding line portions Dispersed and further extends from the left and right oblique line portions to the substantially parallel longitudinal fold line portions on the left and right, and the oblique fold line portion and the substantially parallel longitudinal fold line portion are mountain-folded, and the oblique fold line portion and the substantially parallel longitudinal fold line portion are A surface portion in which the surrounded portion is recessed is automatically formed. Therefore, after opening the carton blanks folded flat into a cylindrical shape, there is no need to form a separately recessed surface portion, and a paper container having a surface portion formed at the corner of the cylindrical body portion is used with a conventional filling machine. It can be manufactured easily.
In the paper container manufactured as described above, the substantially parallel vertical fold line portion forming the surface portion at the corner portion of the cylindrical body portion becomes a rib to increase the strength of the cylindrical body portion. As a result, even if a paperboard material having a small basis weight and a low rigidity is used, it is possible to prevent the swelling due to the weight of the contents. In addition, by forming a recessed surface portion at the corner of the cylindrical body portion, it is possible to obtain a paper container that is easy to hold and does not drop off by grasping the surface portion.

According to the paper container according to claim 2, of the four barrel longitudinal fold line provided between the four barrel panels forming the four corners of the tube-shaped body portion, the four corners Two trunk vertical fold lines that form two corners on one of the two intersecting diagonal lines that connect diagonally intersect the virtual tangent line of the adjacent trunk panel and the top lateral fold line And the vicinity of the upper intersection of the trunk panel side virtual tangent and the vicinity of the lower intersection of the intersection of the virtual tangent and the bottom horizontal folding line on the virtual tangent of the trunk panel, and the vertices A diagonal line portion provided on each adjacent body panel and a diagonal line portion provided on each adjacent body panel, each forming a predetermined angle with each tangent and having a predetermined dimension, Parallel provided to connect the ends of Each of the adjacent corners constituting the trunk vertical fold line at the time of mountain folding of the two trunk vertical fold lines forming the two corners. The diagonal fold line portion and the substantially parallel vertical fold line portion provided in the part panel are fold-folded, and a surface portion surrounded by the fold-folded diagonal fold line portion and the substantially parallel vertical fold line portion is formed, and the two corner portions are formed. The surface portion to be formed is formed so as not to overlap with the vertical edge joint portion joined by the longitudinal seal panel.
In manufacturing a paper container, first, a carton blank formed by joining the vertical edges with the vertical seal panel into a cylindrical shape, and a trunk vertical fold line composed of the oblique fold line portion and the substantially parallel vertical fold line portion. It is folded flat from the trunk vertical fold line on the other diagonal line not included, and is supplied to the filling machine in this state. Here, when the carton blanks are opened in a cylindrical shape, with this opening operation, the action of mountain folding applied to the trunk panel adjacent to the trunk vertical fold line composed of the oblique fold line part and the substantially parallel vertical fold line part is A body panel at a lower intersection where the virtual tangent and the bottom lateral fold line intersect each other, and a vicinity of the upper intersection where the virtual tangent of the adjacent body panel and the top horizontal fold line intersect on the virtual tangent on the body panel side Dispersed from the respective vertices with the vicinity on the side virtual tangent as vertices to the left and right oblique line parts, and further from the left and right oblique line parts to the substantially parallel longitudinal line parts on the left and right, substantially the oblique line parts. The parallel vertical fold line portion becomes a mountain fold, and a surface portion having a concave portion surrounded by the oblique fold line portion and the substantially parallel vertical fold line portion is automatically formed. Therefore, it is possible to easily manufacture a paper container in which a surface portion is formed at a corner portion of the cylindrical body portion using a conventional filling machine.
In addition, the oblique fold line portion includes the vicinity of the upper intersection point where the virtual tangent line of the adjacent trunk panel and the top horizontal fold line intersect on the virtual tangent line on the trunk panel side, and the virtual tangent line and the bottom horizontal fold line intersect each other. Since the vicinity of the lower intersection point on the virtual tangent line on the body panel is a vertex, the upper intersection point where the virtual tangent line of the adjacent trunk panel intersects the top horizontal folding line, the virtual tangent line and the bottom horizontal folding line Compared to the inclined folding line part with the intersection at the lower intersection, the flat carton blanks are opened in a cylindrical shape, and when the concave part is formed on the body vertical folding line that forms the corner, the load is applied to the vertex. Difficult to concentrate. Therefore, problems during molding of the paper container such as cracks in the paperboard material or pinholes in the thermoplastic resin are unlikely to occur.
In the paper container manufactured as described above, the substantially parallel vertical fold line portion forming the surface portion at the corner portion of the cylindrical body portion becomes a rib to increase the strength of the cylindrical body portion. As a result, even if a paperboard material having a small basis weight and a low rigidity is used, it is possible to prevent the swelling due to the weight of the contents. In addition, by forming a recessed surface portion at the corner of the cylindrical body portion, it is possible to obtain a paper container that is easy to hold and does not drop off by grasping the surface portion.

  According to the paper container of claim 3, the upper intersection or the upper intersection of the virtual tangent of the adjacent body panel and the top horizontal folding line of any one of claims 1 or 2 The apex is the vicinity on the trunk panel side virtual tangent, and the lower intersection where the virtual tangent and the bottom horizontal folding line intersect or the vicinity on the trunk panel side virtual tangent of the lower intersection. The oblique fold line portions provided on the respective body panels adjacent to each other at a predetermined angle with the respective tangent lines have the same angle and the same dimension across the virtual tangent line. . Therefore, when the carton blanks folded flat are opened in a cylindrical shape, the action of mountain folding applied to the trunk panel adjacent to the trunk vertical fold line composed of the oblique fold line portion and the substantially parallel vertical fold line portion is adjacent. The upper intersection where the virtual tangent of the trunk panel and the top horizontal fold line intersect or the vicinity of the upper intersection on the virtual tangent on the trunk panel, and the lower intersection or lower part where the virtual tangent and the bottom lateral fold line intersect It acts with exactly the same force from each vertex with the vertex on the virtual tangent on the trunk panel side of the intersection to the left and right diagonal lines, so the left and right diagonal lines simultaneously fold in the mountain, and then the left and right Since the substantially parallel vertical fold line portions on the left and right sides of the oblique fold line portion are simultaneously folded in a mountain, a paper container having a surface portion formed at the corner portion of the cylindrical body portion can be reliably manufactured.

It is a perspective view which shows the 1st example of embodiment of the paper container which concerns on this invention. It is the perspective view seen from the different angle of the paper container shown in FIG. It is an expanded view which shows the carton blanks before an assembly process of the paper container shown in FIG. It is explanatory drawing which shows the diagonal fold line part and the substantially parallel vertical fold line part which comprise the trunk | drum vertical fold line provided between the trunk | drum panel adjacent to the paper container shown in FIG. It is explanatory drawing which shows the other example of the diagonal fold line part and the substantially parallel vertical fold line part which comprise the trunk | drum vertical fold line provided between the trunk | drum panel adjacent to the paper container shown in FIG. It is a top view which shows the state before the filling machine supply which folded the cylindrical carton blanks formed by joining a vertical edge with the vertical direction seal panel from the expanded view shown in FIG. 3 flatly. It is explanatory drawing which shows the operation | movement which opens the carton blanks folded flat shown in FIG. 6 in a cylinder shape on a filling machine. It is an expanded view which shows the carton blank before the assembly process of the reference example of the 1st example of embodiment of the paper container which concerns on this invention. It is a perspective view which shows the 2nd example of embodiment of the paper container which concerns on this invention. It is the perspective view seen from a different angle of the paper container shown in FIG. It is an expanded view which shows the carton blanks before an assembly process of the paper container shown in FIG. It is an expanded view which shows the carton blank before the assembly process of the reference example of the 2nd example of embodiment of the paper container which concerns on this invention.

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 to 7 show a first example of an embodiment of a paper container according to the present invention. FIG. 1 is a perspective view of the paper container of the first example, and FIG. 2 is a diagram of the first example shown in FIG. FIG. 3 is a developed view showing a carton blank before assembly processing of the paper container of the first example shown in FIG. 1, and FIG. 4 is a paper container of the first example shown in FIG. FIG. 5 is an explanatory view showing a diagonal fold line portion and a substantially parallel vertical fold line portion constituting a trunk vertical fold line provided between adjacent barrel panel, FIG. 5 is an adjacent trunk portion of the paper container of the first example shown in FIG. FIG. 6 is an explanatory view showing another example of the oblique fold line portion and the substantially parallel vertical fold line portion constituting the body vertical fold line provided between the panels, and FIG. 6 is a development view shown in FIG. FIG. 7 is a plan view showing the state before the filling machine is fed, in which the cylindrical carton blanks formed in this way are folded flat, and FIG. The carton blanks folded, is an explanatory view showing the operation of opening the tubular filling machine.

  The paper container of the first example is made of a paperboard material in which thermoplastic resins are laminated on the front and back surfaces, and includes four body panels 5, 6, 7, and 8 via body vertical folding lines 1, 2, 3, and 4. The vertical cylindrical panels 10 are formed by joining the vertical edges by the vertical seal panel 9.

A pair of gable roof forming panels 15 having outer top seal panels 13, 14 at the upper part of the upper ends of the opposite body panels 5, 7 of the cylindrical body 10 via top horizontal folding lines 11, 12. , 16 are continuously provided. In addition, a pair of end wall forming panels 21 and 22 that have inner top seal panels 19 and 20 at the upper part of the upper ends of the other opposing body panel 6 and 8 via top horizontal folding lines 17 and 18 and face each other. Are connected.
And a pair of gable wall forming panels 21 and 22 are folded between a pair of gable roof forming panels 15 and 16, and outer top seal panels 13 and 14 and inner top seal panels 19 and 20 are in a predetermined position. The top 23 is formed by being heated, sealed and sealed.

  In addition, a pair of outer bottom panels 26 and 27 facing each other via bottom horizontal folding lines 24 and 25 are connected to the lower ends of the body panels 5 and 7, and the bottom parts of the body panels 6 and 8 are connected to the bottom. A pair of inner bottom panels 30, 31 facing each other via the horizontal folding lines 28, 29 are connected to each other, and the pair of outer bottom panels 26, 27 are folded and sealed outside the pair of inner bottom panels 30, 31. The bottom 32 is formed by being sealed.

  In the first example, the trunk panel 5 and the gable roof forming panel 15 and the outer bottom panel 26 connected to the upper and lower sides of the trunk panel 5 are divided into two in the vertical direction, and one trunk panel piece 5a, The gable roof forming panel piece 15a and the outer bottom panel piece 26a are connected to the trunk panel 6, the wife wall forming panel 21 and the inner bottom panel 30 via the trunk vertical folding line 1, and the other trunk panel piece 5b. The gable roof forming panel piece 15 b and the outer bottom panel piece 26 b are connected to the trunk panel 8, the wife wall forming panel 22, and the inner bottom panel 31 via the trunk vertical folding line 4. The vertical seal panel 9 is connected to the longitudinal edges of the other body panel piece 5b, the gable roof forming panel piece 15b, and the outer bottom panel piece 26b, and the longitudinal seal panel 9 is connected to the one body panel piece 5a. The rectangular tubular body 10 is formed by joining to the vertical edges of the gable roof forming panel piece 15a and the outer bottom panel piece 26a.

Paper container according to the present invention, four to form four corners of the cylindrical body 10 is provided between the four body panel 5, 6, 7 and 8 the body portion longitudinal fold lines 1,2,3, 4, two trunk vertical folding lines 2, 4 that form two corners on one of the two diagonals that cross the four corners diagonally, in the first example, As shown in FIG. 4, the upper intersection where the virtual tangent line 33 between the adjacent body panels 6 and 7 and between the body panels 5 and 8 and the top lateral folding lines 12, 17 and 11, 18 intersect is shown. A vertex 34 is a lower intersection where the virtual tangent 33 and the bottom horizontal folding lines 25, 28, 24, and 29 intersect, and a vertex 35. From each vertex 34, 35, the virtual tangent 33 and a predetermined angle θ1, θ2 respectively. , θ3, θ4 and adjacent to each other with predetermined dimensions L1, L2, L3, L4. And between the adjacent barrel panels 6 and 7 and between the barrel panels 5 and 8, and between the adjacent barrel panels 6 and 7 and between the barrel panels 5 and 8. It is comprised by the substantially parallel vertical fold line part 38a, 38b provided so that the edge parts of the diagonal fold line part 36a, 36b and diagonal fold line part 37a, 37b which were provided may be connected.

  In the oblique line portions 36a, 36b and the oblique line portions 37a, 37b, the angles θ1, θ2, θ3, θ4 formed with the virtual tangent lines 33 are the same angle, and the dimensions L1, L2, L3, respectively. L4 is preferably the same size. Moreover, although the substantially parallel vertical folding line part 38a, 38b is a straight line in the 1st example, it is not restricted to this, For example, circular arc shape and wavy line shape may be sufficient.

  Further, in the first example, the top intersection where the virtual tangent line 33 between the adjacent body panels 6 and 7 and between the body panels 5 and 8 and the top lateral folding lines 12, 17 and 11 and 18 intersect is a vertex. 34, and the oblique intersections 36a and 36b and the oblique folding lines 37a and 37b are provided with the lower intersection where the virtual tangent line 33 and the bottom horizontal folding lines 25, 28 and 24, 29 intersect as the vertex 35. As shown in FIG. 5, the trunk at the upper intersection where the virtual tangent line 33 between the adjacent trunk panels 6, 7 and between the trunk panels 5, 8 intersects with the top lateral folding lines 12, 17, 11, 18. The vicinity of the virtual tangent line 33 on the panel 5, 6, 7, 8 side is the apex 34, and the body panel 5 at the lower intersection where the virtual tangent line 33 and the bottom lateral folding lines 25, 28 and 24, 29 intersect. Virtual tangent 3 on 6, 7, 8 side It may be oblique fold line portions 36a, 36b and the oblique fold line portion 37a, 37b are provided near the apex 35 on.

  However, the position in the vicinity of this is that, when the carton blanks are opened into a cylindrical shape by a filling machine, which will be described later, the force of mountain folding applied between the adjacent trunk panels 6 and 7 and between the trunk panels 5 and 8 is reduced. It is limited to the range that acts on the oblique line portions 36a and 36b and the oblique line portions 37a and 37b.

In this way, the oblique fold line portions 36a and 36b and the oblique fold line portions 37a and 37b and the substantially parallel vertical fold line portions 38a and 38b provided between the adjacent body panel 6 and 7 and between the body panels 5 and 8 are provided. In the corner portion formed by the body vertical fold lines 2 and 4, the surface portion is recessed in the portion surrounded by the oblique fold line portions 36a and 36b and the oblique fold line portions 37a and 37b and the substantially parallel vertical fold line portions 38a and 38b. 39 is formed.
At this time, the surface portion 39 needs to be formed so as not to overlap the vertical edge joint portion 40 joined by the longitudinal seal panel 9.

  Next, in the process of manufacturing the paper container of the first example, the operation of opening the cylindrical body 10 formed by joining the vertical edges by the vertical seal panel 9 with a filling machine will be described with reference to FIGS. .

First, the cylindrical carton blanks 41 formed by joining the vertical edges by the vertical seal panel 9 shown in the developed view shown in FIG. 3 is flattened from the trunk vertical folding lines 1 and 3 as shown in FIG. Fold it up.
Then, as shown in FIG. 7, the carton blanks 41 folded flat are supplied to the carton basket 42 of the filling machine so that the trunk vertical folding lines 2 and 4 are positioned up and down. The carton blanks 41 supplied to the carton basket 42 are supported by the support pieces 43 so that the lower surfaces on both sides thereof can be detached. From this state, the picker 44 is raised, the vacuum head 45 is attracted to the body panel 6 located below the carton blanks 41 folded in the flat portion, and the picker 44 is lowered.

  The carton blanks 41 adsorbed by the vacuum head 45 by the lowering of the picker 44 are pulled out from the bottom of the carton basket 42 on both sides thereof, and the trunk panel 7 located below the carton blanks 41 stands up. The carton blanks 41 which are raised by the raising guide portion 46 and are in a folded state are opened in a cylindrical shape. As the picker 44 further descends, the corners of the carton blanks 41 that are opened in a cylindrical shape are received by the corner support guide portion 47, where they are held in a cylindrical shape and guided by a mandrel (not shown). . Thereafter, the bottom of the carton blanks 41 is sealed, and liquid filling and top sealing are performed in the subsequent steps on the filling machine.

Due to the start-up of the body panel 7 located below the carton blanks 41, the folds between the body panels 6 and 7 located above and below the carton blanks 41 and between the body panels 5 and 8 occur. Force acts. This force is distributed from the vertices 34 and 35 to the oblique line portions 36a and 36b and the oblique line portions 37a and 37b, and from the oblique line portions 36a and 36b and the oblique line portions 37a and 37b, the substantially parallel vertical folding line portion 38a. , 38b, the oblique fold line portions 36a, 36b, the oblique fold line portions 37a, 37b, and the substantially parallel vertical fold line portions 38a, 38b are mountain-folded. As a result of these mountain folds, diagonal lines are formed at the corners formed by the trunk vertical fold lines 2 and 4 constituted by the diagonal fold lines 36a and 36b and the diagonal fold lines 37a and 37b and the substantially parallel vertical fold lines 38a and 38b. A surface portion 39 in which a portion surrounded by the portions 36a, 36b and the oblique folding line portions 37a, 37b and the substantially parallel vertical folding line portions 38a, 38b is recessed is automatically formed.
Thus, the paper container of the first example can be easily manufactured using a conventional filling machine.

FIG. 8 shows a reference example of the first example of the embodiment of the paper container according to the present invention, and is a development view showing the carton blanks before assembling the paper container of the reference example of the first example .
Regarding the paper container of the reference example of the first example, the same components as those of the first example are denoted by the same reference numerals, and the description thereof is omitted. Only the components different from those of the first example will be described.

The paper container of the reference example of the first example is provided on the body vertical folding lines 1, 2, 3, 4 which are provided between the four body panels 5, 6, 7, 8 and form the corners of the cylindrical body 10. The trunk vertical fold line forming one corner of the trunk, the trunk vertical fold line 2 between the trunk panels 6 and 7 in the reference example of the first example, and the oblique fold line parts 36a and 36b similar to the first example, It is comprised by the substantially parallel vertical fold line part 38a, 38b provided so that the edge parts of the diagonal fold line part 37a, 37b might be connected.

Further, in the reference example of the first example, the top intersection point where the virtual tangent line 33 (see FIG. 4) between the adjacent trunk panels 6 and 7 and the top horizontal folding lines 12 and 17 intersect is the vertex 34, and The oblique intersections 36a, 36b and the oblique folding lines 37a, 37b are provided with the lower intersection where the virtual tangent line 33 and the bottom horizontal folding lines 25, 28 intersect as the vertex 35. A virtual tangent line 33 and the top fold line 12, 17 intersect with each other on the virtual tangent line 33 on the side of the body panel 5, 6, 7, 8 at the upper intersection, and the virtual tangent line 33 The oblique fold line portions 36a and 36b and the oblique fold line portions 37a and 37b have apexes 35 as the vicinity on the virtual tangent line 33 on the body panel 5, 6, 7 and 8 side of the lower intersection where the bottom horizontal fold lines 25 and 28 intersect. May be provided (see Fig. 5) ).
Since the other configuration is the same as that of the first example, the description of the first example is cited.

9 to 11 show a second example of the embodiment of the paper container according to the present invention, FIG. 9 is a perspective view of the paper container of the second example, and FIG. 10 is a diagram of the second example shown in FIG. perspective view from a different angle of the paper container, Figure 11 is a paper container of the second example shown in FIG. 9, the paper container of the second example is a development view showing the carton blank before the assembly process, the first example About the same structure, the same code | symbol is attached | subjected, the description is abbreviate | omitted, and only a different structure from a 1st example is demonstrated.

The paper container of the second example is made of a paperboard material in which thermoplastic resins are laminated on the front and back surfaces, and includes four body panels 5, 6, 7, and 8 via body vertical folding lines 1, 2, 3, and 4. The vertical cylindrical panels 10 are formed by joining the vertical edges by the vertical seal panel 9.
In the paper container of the second example, a longitudinal seal panel 9 is continuously provided at the longitudinal edge of the trunk panel 5, and the trunk vertical folding line 1 is provided between the longitudinal seal panels 9 of the trunk panel 5. A vertical seal panel 9 is joined to the vertical edge of the body panel 6 to form a rectangular tubular body 10.

Paper container of the second example, as in the first example, four barrel longitudinal forming the four corners of the cylindrical body 10 is provided between the four barrel panels 5-8 of fold lines 1, 2, 3, 4, four connecting corner diagonally to form two corner portions located on one diagonal line of the two diagonal lines intersecting two of the barrel longitudinal fold line 2, 4 between the adjacent body panel 6, 7 and between the adjacent body panel 6, 7, and between the adjacent body panel 6, 7 and the adjacent body panel 6, 7. It is comprised by the substantially parallel vertical fold line part 38a, 38b provided so that the edge parts of diagonal fold line part 36a, 36b and diagonal fold line part 37a, 37b which were provided in the trunk | drum panel 5 and 8 may be connected. ing.

Further, in the second example, the top intersection where the virtual tangent line 33 between the adjacent body panels 6 and 7 and between the body panels 5 and 8 and the top horizontal folding lines 12, 17 and 11, 18 intersect is a vertex. 34, and the oblique intersections 36a, 36b and the oblique folding lines 37a, 37b are provided with the lower intersection where the virtual tangent line 33 and the bottom horizontal folding lines 25, 28, 24, 29 intersect, as apexes 35. Torso panels 5, 6, 7, at the upper intersection where the virtual tangent line 33 between the torso panels 6, 7 and between the torso panels 5, 8 and the top transverse folding lines 12, 17, and 11, 18 intersect. The vicinity on the virtual tangent line 33 on the 8 side is the apex 34, and on the side of the body panel 5, 6, 7, 8 at the lower intersection where the virtual tangent line 33 and the bottom horizontal folding lines 25, 28 and 24, 29 intersect A neighborhood on a virtual tangent 33 Oblique fold line portion 36a as a point 35, 36b and the oblique fold line portion 37a, optionally 37b are provided (see FIG. 5).
Since the other configuration is the same as that of the first example, the description of the first example is cited.
According to the paper container of the second example configured as described above, since the effect is the same as that of the first example, the first example is used.

FIG. 12 shows a reference example of the second example of the embodiment of the paper container according to the present invention, and is a development view showing the carton blank before assembly processing of the paper container of the reference example of the second example .
Regarding the paper container of the reference example of the second example , the same components as those of the first example are denoted by the same reference numerals and the description thereof is omitted, and only the components different from those of the first example will be described.

As in the second example, the paper container of the reference example of the second example is provided with the vertical seal panel 9 connected to the vertical edge of the trunk panel 5 and between the vertical seal panels 9 of the trunk panel 5. A vertical fold line 1 is provided, and a vertical seal panel 9 is joined to a vertical edge of the body panel 6 to form a rectangular tubular body 10.

The paper container of the reference example of the second example is a body part that is provided between the four body panel panels 5, 6, 7, 8 and forms the corners of the cylindrical body part 10, similarly to the reference example of the first example The body vertical fold line forming one corner of the vertical fold lines 1, 2, 3 and 4; in the reference example of the second example , the body vertical fold line 2 between the body panels 6 and 7 is the first example. And substantially parallel vertical fold line portions 38a, 38b provided to connect the end portions of the fold line portions 36a, 36b and the oblique fold line portions 37a, 37b.
Since the other configuration is the same as that of the first example, the description of the first example is cited.

1, 2, 3, 4 Body vertical folding lines 5, 6, 7, 8 Body panel 5a, 5b Body panel piece 9 Vertical seal panel 10 Tubular body 11, 12 Top lateral folding lines 13, 14 Outside top seal Panels 15, 16 Gable roof forming panels 15a, 15b Gable roof forming panel pieces 17, 18 Top horizontal fold lines 19, 20 Inner top seal panels 21, 22 Margin wall forming panels 23 Top 24, 25 Bottom horizontal fold lines 26, 27 Outer bottom panels 26a, 26b Outer bottom panel pieces 28, 29 Bottom horizontal fold lines 30, 31 Inner bottom panel 32 Bottom 33 Virtual tangent lines 34, 35 Apexes 36a, 36b, 37a, 37b Oblique fold lines 38a, 38b Substantially parallel lines 39 Surface 40 Vertical edges Joint 41 Carton blanks 42 Carton basket 43 Support piece 44 Picker 45 Vacuum head 46 Start-up guide 47 Corner support guide

Claims (3)

It consists of a paperboard material with thermoplastic resin laminated on the front and back, and it has four barrel panels, and the vertical edges are joined by a vertical seal panel to form a square cylindrical barrel, on the upper end of the barrel panel A pair of gable roof forming panels having an outer top seal panel at the top via the top horizontal folding line and a pair of gable walls facing each other having an inner top seal panel at the top via the top horizontal folding line Panels are provided in series, the pair of gable wall forming panels are folded between the pair of gable roof forming panels, and the top seal panels are heated and sealed at predetermined positions to be sealed. A pair of outer bottom panels opposed to each other via a bottom horizontal folding line and a pair of inner bottom panels opposed to each other via a bottom horizontal folding line at the lower end of the body panel There are continuously provided, in the paper container of gable roof-shaped bottom portion is formed by the pair of inner bottom said pair of outer bottom panels on the outside of the panel are sealed are folded and sealed,
Of the four barrel longitudinal fold line provided between the four barrel panels forming the four corners of the tube-shaped body portion, one of the two diagonal lines intersecting connecting four corners in the diagonal Two trunk vertical fold lines forming two corners on one diagonal line are an upper intersection where an imaginary tangent of an adjacent trunk panel and the top horizontal fold line intersect, and the imaginary tangent and the bottom horizontal A diagonal line portion provided on each body panel adjacent to each other at a predetermined angle with each of the virtual tangent lines, each having a predetermined dimension, and a lower intersection where the broken line intersects with each other. It is composed of substantially parallel vertical fold line portions provided so as to connect the end portions of the diagonal fold line portions opposed to each other in the upper and lower sides provided in each adjacent body panel,
In the two corners, oblique folding lines provided on the respective adjacent trunk panels constituting the trunk vertical folding line at the time of mountain folding of the two trunk vertical folding lines forming the two corners And the substantially parallel vertical fold line part is folded in a mountain, and the face part surrounded by the folded fold line part and the substantially parallel vertical fold line part is formed, and the surface part formed at the two corners is A paper container, wherein the paper container is formed so as not to overlap with a longitudinal edge joint joined by a longitudinal seal panel. It consists of a paperboard material with thermoplastic resin laminated on the front and back, and it has four barrel panels, and the vertical edges are joined by a vertical seal panel to form a square cylindrical barrel, on the upper end of the barrel panel A pair of gable roof forming panels having an outer top seal panel at the top via the top horizontal folding line and a pair of gable walls facing each other having an inner top seal panel at the top via the top horizontal folding line Panels are provided in series, the pair of gable wall forming panels are folded between the pair of gable roof forming panels, and the top seal panels are heated and sealed at predetermined positions to be sealed. A pair of outer bottom panels opposed to each other via a bottom horizontal folding line and a pair of inner bottom panels opposed to each other via a bottom horizontal folding line at the lower end of the body panel There are continuously provided, in the paper container of gable roof-shaped bottom portion is formed by the pair of inner bottom said pair of outer bottom panels on the outside of the panel are sealed are folded and sealed,
Of the four barrel longitudinal fold line provided between the four barrel panels forming the four corners of the tube-shaped body portion, one of the two diagonal lines intersecting connecting four corners in the diagonal Two trunk vertical fold lines forming two corners on one diagonal line are on the trunk panel side virtual tangent of the upper intersection where the virtual tangent of the adjacent trunk panel and the top horizontal fold line intersect each other. The vicinity is a vertex on the trunk panel side virtual tangent of the lower intersection where the virtual tangent and the bottom horizontal fold line intersect, and each virtual tangent forms a predetermined angle from each vertex, and each An abbreviation provided to connect end portions of diagonally-folded line portions provided on adjacent trunk panel to each other and a diagonally-folded line portion provided on each adjacent trunk panel with a predetermined dimension. It consists of a parallel vertical fold line part,
In the two corners, oblique folding lines provided on the respective adjacent trunk panels constituting the trunk vertical folding line at the time of mountain folding of the two trunk vertical folding lines forming the two corners And the substantially parallel vertical fold line part is folded in a mountain, and the face part surrounded by the folded fold line part and the substantially parallel vertical fold line part is formed, and the surface part formed at the two corners is A paper container, wherein the paper container is formed so as not to overlap with a longitudinal edge joint joined by a longitudinal seal panel.   The upper intersection where the virtual tangent of the adjacent body panel and the top horizontal folding line intersect or the vicinity of the upper intersection on the virtual tangent on the body panel side, and the lower intersection where the virtual tangent and the bottom lateral folding line intersect Alternatively, the vicinity of the lower intersection on the body panel side virtual tangent is set as a vertex, and each vertex panel is provided at each of the adjacent body panels that form a predetermined angle with each of the virtual tangents and have a predetermined size. 3. The paper container according to claim 1, wherein the oblique line portions have the same angle and the same size across the virtual tangent line. 4.

Images