JP2023004692A - Manufacturing method of packaging container - Google Patents

Abstract

To provide a manufacturing method of a packaging container provided by overlaying a top part side sheet equipped with a spout and a bottom part side sheet and sealing the whole circumference of them, the manufacturing method being able to improve efficiency of a transfer process or a storage process.SOLUTION: A top part side sheet 1A which is not equipped with a spout 1C and a bottom part side sheet 1B are overlaid together, and a part of the circumference of them is left as an unsealed edge 1402, and the other circumference is sealed, thereby an intermediate product 11 in a flat state is manufactured. The intermediate product 11 is stored and transferred, and then the spout 1C is inserted from the unsealed edge to be internally deposited.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a method of manufacturing a packaging container in which a top-side sheet and a bottom-side sheet are superimposed and sealed and fixed to each other along the entire periphery.

Such packaging containers are described, for example, in US Pat.

This packaging container 2 is as follows.

That is, the top side sheet 2A used for this packaging container 2 has a polygonal top surface 2A10 in the center, as shown in FIG. A spout is attached to this opening.

Next, the top-side sheet 2A has rectangular top-side side surfaces 2A21 to 2A24 with each side of the top surface 2A10 as one side, with each side of the top surface 2A10 having a polygonal shape as a ruled line for folding. there is The number of top side surfaces 2A21 to 2A24 is the same as the number of sides of the polygonal top surface 2A10.

Further, the top-side sheet 2A has top-side connecting pieces 2A31 to 2A34 between the mutually adjacent top-side side surfaces, which connect the top-side side surfaces 2A21 to 2A24. That is, the top-side connecting piece 2A31 connects the top-side side surface 2A21 and the top-side side surface 2A22. Moreover, the top-side side surface 2A22 and the top-side side surface 2A23 are connected by a top-side connecting piece 2A32. The same applies to the other side surfaces on the top side. Folding lines are provided between the top side side surfaces 2A21 to 2A24 and the top side connecting pieces 2A31 to 2A34.

The top side connecting pieces 2A31 to 2A34 close the space between the top side side surfaces 2A21 to 2A24. As shown in the figure, in this example, the combined shape of the top-side side surfaces 2A21 to 2A24 and the top-side connecting pieces 2A31-2A34 constitutes a rectangle, and the top-side connecting pieces 2A31 to 2A34 are It is located at the corner and closes the space between the side surfaces 2A21 to 2A24 on the top side. For example, the space between the top-side side surface 2A21 and the top-side side surface 2A22 is blocked by a top-side connecting piece 2A31.

The top side connecting pieces 2A31 to 2A34 have crease lines for bi-folding the top side connecting pieces 2A31 to 2A34 from each vertex of the top surface 2A10. That is, as shown enlarged in FIG. 6, for example, the top side surface 2A23 and the top side surface 2A24 share the vertex 2A10b of the top surface 2A10. Among the sides forming the top-side side surface 2A23, the sides sharing the vertex 2A10b of the top surface 2A10 are denoted by reference numeral 2A23b. Further, among the sides forming the top side surface 2A24, the sides sharing the vertex 2A10b of the top surface 2A10 are denoted by reference numeral 2A24b. A top-side double-folding ruled line 2A33c is provided to bisect the angle formed by the side 2A23b and the side 2A24b. , 2A332. That is, in the figure, the angle θ1 formed by the side 2A23b and the double-folding ruled line 2A33c is equal to the angle θ2 formed by the side 2A24b and the top-side double-folding ruled line 2A33c, and the regions 2A331 and 2A332 are of the same shape. They are of the same size and arranged line-symmetrically with the top-side double-folding ruled line 2A33c as the axis of symmetry. The top side connecting piece 2A33 is taken as an example to describe the top side double-folding ruled line 2A33c. 2A34c is provided.

Next, the top-side sheet 2A consists of a heat-sealed area to be fixed to the bottom-side sheet 2B on the outside of the rectangular portion formed by combining the top-side side surfaces 2A21 to 2A24 and the top-side connecting pieces 2A31 to 2A34. It has a top fixing portion 2A40.

Next, the bottom sheet 2B has the same structure as the top side sheet 2A, except for the points described later. That is, as shown in FIG. 7, first, the bottom sheet 2B has a polygonal bottom surface 2B10 in the center. The polygonal bottom surface 2B10 has the same shape as the top surface 2A10. The difference between the bottom sheet 2B and the top side sheet 2A is that the top surface 2A10 of the top side sheet 2A is provided with an opening, and the spout 2C is attached to the opening. The bottom surface 2B10 of the seat 2B is not provided with an opening and, of course, is not equipped with a spout.

In addition, the bottom sheet 2B has square bottom side surfaces 2B21 to 2B24 with each side of the polygonal bottom surface 2B10 as a ruled line for folding, and the number of sides of the polygonal bottom surface 2B10. I have the same four. These bottom-side side surfaces 2B21 to 2B24 also have the same shape as the top-side side surfaces 2A21 to 2A24, respectively.

Further, the bottom sheet 2B has bottom side connecting pieces 2B31 to 2B34 between the bottom side side surfaces 2B21 to 2B24 that are adjacent to each other to connect and block the bottom side side surfaces 2B21 to 2B24. These bottom side connecting pieces 2B31 to 2B34 have the same shape as the top side connecting pieces 2A31 to 2A34.

In addition, creases for folding are provided between the bottom side side surfaces 2B21 to 2B24 and the bottom side connecting pieces 2B31 to 2B34. Each of the bottom side connecting pieces 2B31 to 2B34 is provided with bottom side double-folding creases 2B31c to 2B34c that bisect the bottom side connecting pieces 2B31 to 2B34 from each vertex of the bottom surface 2B10. The bottom side connecting pieces 2B31 to 2B34 are each divided into two regions by the double-folding ruled lines 2B31c to 2B34c.

Next, the bottom side sheet 2B consists of a heat-sealed area fixed to the top side sheet 2A outside the rectangular portion formed by combining the bottom side side surfaces 2B21 to 2B24 and the bottom side connecting pieces 2B31 to 2B34. It has a fixing part 2B40.

Then, by aligning and overlapping the top side sheet 2A and the bottom side sheet 2B and heat-sealing the fixing portions 2A40 and 2B40 to each other, the packaging container 2 in a flat state can be manufactured (Fig. 8). The packaging container 2 can be boxed in such a flat state, transported, and supplied to the process of filling and sealing the contents. Even when the packaging container 2 is flat, the spout 2C protrudes outward.

In order to transform the flat packaging container 2 into a box shape, the top side sheet 2A and the bottom side sheet 2B may be folded along the folding lines and raised.

In the box-shaped packaging container 2 thus formed, the top side connecting pieces 2A31 to 2A34 and the bottom side connecting pieces 2B31 to 2B34 are aligned with the top side double-folding lines 2A31c to 2A34c located in the center and the bottom side. All of the double-folding creases 2B31c to 2B34c are folded in half so as to form mountain folds with respect to the outer surface of the container. As a result of this folding, the sides forming the adjacent side surfaces of the top-side side surfaces 2A21 to 2A24 of the top-side sheet 2A overlap each other, and are separated by the top-side double-folding ruled lines 2A31c to 2A34c, respectively. The two regions overlap each other to form the top side of the finned panel. The top side connecting piece 2A33 will be described with reference to the enlarged view of FIG. Side 2A23b of top-side side 2A23 and side 2A24b of top-side side 2A24 located on both sides overlap each other. The two areas 2A331 and 2A332 separated by the top side double-folding ruled line 2A33c overlap each other to form the top side of the fin-shaped panel protruding outward from each corner of the packaging container.

By the way, in the packaging container 2 in a flat state, the top-side connecting piece 2A33 of the top-side sheet 2A and the bottom-side connecting piece 2B33 of the bottom-side sheet 2B are precisely overlapped, and the top-side two-fold crease 2A33c is formed. and the bottom-side double-folding ruled line 2B33c are also precisely overlapped with each other. The connecting piece 2B33 is also folded in half along the bottom-side double-folding ruled line 2B33c. Therefore, the side 2B23b of the bottom-side side surface 2B23 and the side 2B24b of the bottom-side side surface 2B24 located on both sides of the bottom-side connecting piece 2B33 overlap each other. They overlap to form fin-like panels 133 projecting outward from each corner of the packaging container 2 .

Since the top-side side surface 2A23 of the top-side sheet 2A and the bottom-side side surface 2B23 of the bottom-side sheet 2B are continuous via the container fixing portion 240, the two side surfaces 2A23 and 2B23 form a box shape. A side surface 223 of the packaging container 2 is configured.

In addition, since the top side connecting piece 2A33 of the top side sheet 2A and the bottom side connecting piece 2B33 of the bottom side sheet 2B are also continuous via the container fixing portion 240, the two connecting pieces 2A33 and 2B33 are formed. A portion connects and closes the sides. That is, a side surface 223 composed of a top side surface 2A23 and a bottom side surface 2B23 and a side surface 224 composed of a top side surface 2A24 and a bottom side surface 2B24 are connected, and a gap is provided here. It is blocked so that it does not occur.

In the above description, the case where the portion composed of the top side connecting piece 2A33 and the bottom side connecting piece 2B33 is folded in half has been described as an example, but the same applies to the other connecting pieces.

By folding all the connecting pieces 2A31 to 2A34 and 2B31 to 2B34 in half in this manner, the side surfaces 221 to 224 are formed. takes the form of a box. The box-shaped packaging container 1 has a top surface 2A10 and a bottom surface 2B10, and side surfaces 221 to 224 are provided around the top surface 2A10. Since 2B31 to 2B34 are closed, it is in a sealed state except for the opening to which the spout 2C is attached.

By the way, in the state of being deformed into a box shape as described above, the folded connecting pieces 2A31 to 2A34 and 2B31 to 2B34 constitute the fin-shaped panels 231 to 234, and the fin-shaped panels 231 to 234 form the packaging container. 2 projecting outward from each corner. Therefore, the fin-like panels 231 to 234 can be laid down and folded over the respective side surfaces 221 to 224 of the packaging container 2, and then heat-sealed and adhered, for example, to improve the appearance. FIG. 9 shows the packaging container 2 in such a state that the fin-like panels 231-234 are folded over the respective side surfaces 221-224 of the packaging container 2. As shown in FIG.

As can be seen from the above description, the top side connecting pieces 2A31-2 of the packaging container 2 in a flat state
A34 and all of the bottom side connecting pieces 2B31 to 2B34 are folded in half along these folding lines 2A31c to 2A34c and 2B31c to 2B34c, and the fin-like panels 231 to 234 are attached to the sides 221 to 224 of the packaging container 2. By folding over, the packaging container 2 can be transformed into a box-shaped state.

In addition, all of the top side surfaces 2A21 to 2A24 and the bottom side surfaces 2B21 to 2B24 of the packaging container 2 in a flat state are pushed in from the outside, and then the fin-like panels 231 to 234 are pushed into the respective side surfaces 221 to 221 of the packaging container 2. It is also possible to transform the packaging container 2 into a box-shaped state by folding it 224 . A jig, for example, can be used when pushing in the side surfaces 2A21 to 2A24 and 2B21 to 2B24.

This packaging container 2 has a shape as shown in FIG. The container fixing portion formed by heat-sealing the top side fixing portion 2A40 and the bottom side fixing portion 2B40 is formed on either one of the top side side surfaces 2A21 to 2A24 and the bottom side side surfaces 2B21 to 2B24. When laid down and overlaid on its outer surface (FIG. 9), the container fixing portion is overlaid on the outer surface of the bottom side surfaces 2B21 to 2B24.

The packaging container 2 supplied to the process of filling and sealing the contents in a flat state can be filled with the contents from the spout by being deformed into a box shape in this process. Then, after that, it can be sealed by sealing by applying a cap.

JP 2019-26275 A

As described above, this packaging container 2 is transported to the content filling process in a flat state. In the flat state, the volume is significantly smaller than in the box-shaped state, so many can be accommodated in the box and can be efficiently transported or stored.

However, even when the packaging container 2 is flat, the spout protrudes outward. For this reason, the apparent volume of the packaging container 2 is large, leaving the problem that a sufficient number of packaging containers 2 cannot be efficiently accommodated in a box with a limited volume.

This problem will be explained in detail with reference to FIG. 10. First, FIGS. 10(a) to 10(c) are drawings for explaining the alignment state of the packaging containers 2, and FIG. 10(b) is an explanatory diagram of the aligned state viewed from the X direction of FIG. 10(a), and FIG. 10(c) is the aligned state viewed from the Y direction of FIG. 10(a) FIG. 4 is an explanatory diagram of states;

As can be seen from this figure, 6 packaging containers 2 are arranged in 2 rows and 3 columns to form one tier, which are stacked in 3 tiers and housed inside the box body 2 . The number of packaging containers 2 is 6/stage×3 stages=18. In this way, a large number of packaging containers 2 are arranged in an orderly manner, but since these packaging containers 2 are equipped with spouts, they cannot be efficiently housed in a box of limited volume. , reducing the efficiency of the transfer or storage process.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a manufacturing method for such a packaging container in which the efficiency of the transfer process or the storage process is improved.

That is, the invention according to claim 1 is a method for manufacturing a packaging container in which a top-side sheet and a bottom-side sheet with spouts attached are superimposed and the peripheral edge is sealed over the entire circumference,
a preparation step of preparing the top side sheet and the bottom side sheet to which the spout is not attached;
Manufacture of an intermediate product in a flat state by stacking the top side sheet and the bottom side sheet prepared in the preparation step, leaving a part of the peripheral edge as an unsealed edge, and sealing the other peripheral edge. process and
A storage/transport step of packing a large number of intermediate products manufactured in the intermediate product manufacturing step and storing or transporting them;
The intermediate product stored or transferred in the storage/transfer step is taken out of the box, a spout is inserted into the intermediate product from the unsealed edge, and the spout is attached to the top side sheet from the inside. process and
an unsealed edge sealing step of sealing the unsealed edge of the intermediate product to which the spout is attached by the spout attaching step;
A method for manufacturing a packaging container characterized by having

Next, according to the invention of claim 2, after the unsealed edge sealing step, the packaging container of claim 1 has a rising step of deforming the packaging container into a box shape. is a manufacturing method.

Next, the invention according to claim 3 is a method for manufacturing a packaging container according to claim 1 or 2,
The top-side sheet has a polygonal top surface at its center,
Each side of the polygonal top surface is a square top side surface having the same number as the number of sides of the polygonal top surface,
A top-side connecting piece is provided at each corner between the mutually adjacent top-side side surfaces to connect and close the top-side side surfaces,
A top-side double-folding ruled line is provided so that the top-side connecting piece can be folded in half so that the sides forming the top-side side surface of the adjacent polygonal shape are aligned with each other,
Outside the top-side side surface and the top-side connecting piece, a top-side fixing portion for fixing to the bottom-side sheet is provided,
The bottom side sheet has a polygonal bottom surface at its center,
Each side of the polygonal bottom surface is a square bottom side surface, and the same number of side surfaces as the number of sides of the polygonal bottom surface are provided,
At each corner between the bottom side surfaces adjacent to each other, a bottom side connecting piece is provided for connecting and closing the bottom side surfaces,
a ruled line for folding the bottom-side connecting piece in two so that the sides forming the bottom-side side surface of the adjacent polygonal shape are aligned with each other;
The manufacturing method of the packaging container is characterized in that bottom-side fixing portions for fixing to the top-side sheet are provided outside the bottom-side side surface and the bottom-side connecting piece.

In the present invention, intermediate products without spouts are boxed and stored or transported. Therefore, even if the volume of the box is limited, a sufficiently large number of intermediate products can be efficiently accommodated, and the efficiency of the transfer process and the storage process can be improved.

Since the intermediate product stored and transferred in this way is provided with an unsealed edge, after storage and transfer, a spout is inserted into the intermediate product from this unsealed edge, and the spout is attached to the top side sheet. The packaging container can be manufactured by fitting the spout from the inside of the pry and finally sealing the unsealed edges. Then, this packaging container can be transformed into a box-like state according to a conventional method, and the contents can be accommodated therein.

FIG. 1 relates to a specific example of the present invention, FIG. 1(a) is a plan view of a top side sheet, and FIG. 1(b) is a plan view of a bottom side sheet. FIG. 2 relates to a specific example of the present invention, and is an explanatory cross-sectional view of a first intermediate product. FIG. 3 relates to a specific example of the present invention, FIG. 3(a) is an explanatory view of the aligned state of the boxed state of the first intermediate products viewed from above, and FIG. 3(b) is X in FIG. 3(a). It is explanatory drawing of the aligned state seen from the direction. FIG. 4 is a cross-sectional explanatory view showing a second intermediate product in which a spout is attached to the first intermediate product, according to a specific example of the present invention. FIG. 5 is a cross-sectional explanatory view of a packaging container in a flat state, according to an embodiment of the present invention. FIG. 6 relates to a conventional packaging container and is a plan view of the top side sheet. FIG. 7 relates to a conventional packaging container and is a plan view of the bottom side sheet. FIG. 8 relates to a conventional packaging container, and is an explanatory cross-sectional view of the packaging container in a flat state. FIG. 9 relates to a conventional packaging container and is a perspective view of a box-shaped packaging container. FIG. 10 relates to a conventional packaging container, FIG. 10(a) is an explanatory view of the alignment state of the boxed state of intermediate products viewed from above, and FIG. 10(b) is a view from the X direction of FIG. 10(a) FIG. 10(c) is an explanatory diagram of the aligned state viewed from the Y direction in FIG. 10(a).

Like the packaging container 2, the packaging container according to the present invention is also constructed by stacking a top-side sheet and a bottom-side sheet and sealing each other along the entire circumference.

Accordingly, specific examples of the present invention will be described below with reference to the accompanying drawings. 5 to 10 for explaining the conventional packaging container 2, the elements constituting the conventional packaging container 2 were given reference numerals starting with the first number "2", but the packaging container of the present invention , reference numerals beginning with the leading number "1" are attached, and both are attached with mutually corresponding reference numerals except for this leading number. For example, a conventional packaging container is denoted by "2", and a specific example of the packaging container of the present invention is denoted by "1". Further, the top surface of the conventional packaging container 2 is denoted by "2A10", and the top surface of the packaging container of the present invention is denoted by "1A10". In addition, the side of the conventional packaging container 2 on the top side is labeled "2A21 to 2A24", and the side of the packaging container of the present invention on the top side is labeled "1A21 to 1A24". there is

First, FIG. 1 shows a top-side sheet 1A constituting a packaging container 1 according to this specific example, and FIG. 2 shows a bottom-side sheet 1B.

The top-side sheet 1A has substantially the same structure as the top-side sheet 2A of the conventional packaging container 2 described above.

That is, first, the top side sheet 1A has a polygonal top surface 1A10 in the center, like the top side sheet 2A of the conventional packaging container 2. As shown in FIG. In this example, it is rectangular. However, unlike the conventional top-side seat 2A, this top surface 1A10 is not provided with a spout, and is provided with an opening 1A11 for attaching a spout in a later step.

In addition, the top side sheet 1A has quadrangular top side surfaces 1A21 to 1A24 with each side of a polygonal top surface 1A10 as a ruled line for folding. . Then, it has top side connecting pieces 1A31 to 1A34 that connect the top side side surfaces 1A21 to 1A24 to each other and block the space between them, and the top side side surfaces 1A21 to 1A24 and the top side connecting pieces 1A31 to 1A34 are provided. It is also the same as the top side sheet 2A in that a folding ruled line is provided between them.

Further, the top side sheet 1A is formed of a heat-sealed area fixed to the bottom side sheet 1B outside the polygonal portion formed by combining the top side side surfaces 1A21 to 1A24 and the top side connecting pieces 1A31 to 1A34. It has a frame-shaped ceiling side fixing portion 1A40. In this example, the width of the side extending in the vertical direction in the drawing is configured to be wider than the width of the bottom side fixing portion 1B40, which will be described later. In FIG. 1, the boundary between the top fixing portion 1A40 and the top side surfaces 1A21 to 1A24 and the boundary 1Ax between the top fixing portion 1A40 and the top connecting pieces 1A31 to 1A34 are indicated by broken lines. However, these are given for the convenience of explanation, and there are no creases for folding here. In this way, no folding ruled lines are provided at the boundary between the top side fixing portion 1A40 and the top side side surfaces 1A21 to 1A24 and the boundary 1Ax between the top side fixing portion 1A40 and the top side connecting pieces 1A31 to 1A34. By configuring the width of the side extending in the vertical direction in the drawing to be wider than the width of the bottom side fixing portion 1B40, when the packaging container 1 is shaped like a box, the top side sheet 1A and the bottom side sheet 1B are sealed. The appearance can be improved by covering the part with the wide top side fixing part 1A40.

Next, similarly to the top-side sheet 2A, the top-side connecting pieces 1A31 to 1A34 are folded in half from each vertex of the top surface 1A10 to bisect the top-side connecting pieces 1A31 to 1A34. This top-side double-folding crease line crosses the top-side fixing portion 1A40 located outside the top-side connecting pieces 1A31 to 1A34 to reach the end portion, that is, the top portion It extends to the end of the side sheet 1A.

A plurality of notches 1Aα for alignment are provided on the top side sheet 1A.

Next, the bottom sheet 1B is substantially the same as the bottom sheet 2B of the conventional packaging container 2. As shown in FIG.

As shown in FIG. 2, the bottom sheet 1B has a polygonal bottom surface 1B10 in the center, and each side of the polygonal bottom surface 1B10 is a ruled line for folding. bottom side surfaces 1B21 to 1B24. It has bottom side connecting pieces 1B31 to 1B34 that connect the bottom side side surfaces 1B21 to 1B24 to each other and block the space therebetween. A folding ruled line is provided. These points are the same as those of the bottom side sheet 2B.

Further, the bottom side sheet 1B has a frame-like shape consisting of a heat-sealed area fixed to the top side sheet 1A outside the polygonal portion formed by combining the bottom side side surfaces 1B21 to 1B24 and the bottom side connecting pieces 1B31 to 1B34. bottom side fixing portion 1B40. In addition, as described above, of the portion forming the frame-shaped bottom side fixing portion 1B40, the width of the side extending in the vertical direction in the figure is configured to be narrower than the width of the point side fixing portion 1A40.

Each of the bottom side connecting pieces 1B31 to 1B34 is provided with a bottom side double-folding ruled line that bisects the bottom side connecting pieces 1B31 to 1B34 from each vertex of the bottom surface 1B10. The ruled line crosses the bottom side fixing portion 1B40 located outside the bottom side connecting pieces 1B31 to 1B34 and extends to its end, that is, the end of the bottom side sheet 1b.

A plurality of notches 1Bα for alignment are also provided in the bottom side sheet 1B corresponding to the notch 1Aα for alignment of the top side sheet 1A.
A plurality of notches 1Aα for alignment are provided.

The manufacturing method of the present invention is a method of manufacturing the packaging container 1 by using the spout 1C in addition to the top-side sheet 1A and the bottom-side sheet 1B. This manufacturing method comprises a preparation process of the top side sheet 1A and the bottom side sheet 1B, an intermediate product manufacturing process, a storage/transfer process, a spout attachment process, and an unsealed edge sealing process.

First, the preparation step is a step of preparing the above-described top-side sheet 1A and bottom-side sheet 1B. The spout 1C must not be attached to the prepared top-side sheet 1A.

Next, the intermediate product manufacturing process is a process of stacking the top side sheet 1A and the bottom side sheet 1B to which these spouts 1C are not attached, and sealing and integrating them. The sealing position is a portion where the top-side fixing portion 1A40 of the top-side sheet 1A and the bottom-side fixing portion 1B40 of the bottom-side sheet 1B are superimposed, and a part thereof must be left unsealed. necessary. FIG. 2 is a cross-sectional explanatory view of the _first intermediate product 11 manufactured by sealing the top-side fixing portion 1A40 and the bottom-side fixing portion 1B40 while leaving an unsealed area (unsealed edge). In the figure, “140 ₁ ” indicates a seal edge formed by sealing the top-side fixing portion 1A40 and the bottom-side fixing portion 1B40, and “140 ₂ ” indicates an unsealed edge left unsealed. . In this example, both the top side fixing portion 1A40 and the bottom side fixing portion _1B40 have a rectangular frame shape, _one side of which is the unsealed edge 1402 and the remaining three sides are the sealed edges 1401. there is

Next, the storage/transport step is a step of boxing and storing and transporting the _first intermediate product 11 manufactured in this way. Of course, storage and transfer may be repeated. For example, after being stored at the manufacturing factory of the _first intermediate product 11, it can be transferred to a filling factory and stored at this factory.

The box 3 into which the _first intermediate products 11 are packed may be any box, but it must be able to accommodate a large number of the _first intermediate products 11 for convenience of storage and transportation. A cardboard box, a wooden box, or the like may be used.

FIG. 3(a) is an explanatory view of the alignment state when the _first intermediate products 11 are packed in the box 3, and FIG. 3(b) is an alignment view from the X direction of FIG. 3(a). FIG. 4 is an explanatory diagram of states; Since the spout 1C is not attached to the _first intermediate product 11, its apparent volume is small. can be accommodated. Since a large number of intermediate products ₁₁ can be boxed in the box 3 in this way, the efficiency of the transfer process and the storage process can be improved.

Next, the spout attaching step is a step of taking out the _first intermediate product 1-1 stored or transferred in the storage/transfer step from the box and attaching the spout _1C to this intermediate product 1-1. The spout 1C can be attached by inserting it into the intermediate product 11 from the unsealed edge 1402 and attaching it to the opening _1A11 of the top side sheet _1A . FIG. 4 shows the _second intermediate product 12 thus produced.

Finally, by sealing the unsealed edge 1402 in the unsealed edge sealing process, the packaging container ₁ in a flat state can be manufactured (see FIG. 5). This sealing can be performed by, for example, an ultrasonic sealing method or the like.

The packaging container 1 manufactured in this manner can be used in the same manner as the conventional packaging container 2 . That is, it is possible to fill and store the contents through a rising process of transforming from a flat state to a box-like state, or at the same time as this rising process. Filling can be done through spout 1C. After filling, the spout can be capped and sealed.

1: Packaging container 1A: Top side sheet 1A10: Top side 1A11: Opening 1A21 to 1A24: Top side side 1A31 to 1A34: Top side connecting piece 1A40: Top side fixing part 1B: Bottom side sheet 1B10: Bottom 1B21 1B24: bottom side surface 1B31 to 1B34: bottom side connecting piece 1B40: bottom side fixing part 1C: spout 1 ₁ : first intermediate product 140 ₁ : seal edge 140 ₂ : unsealed edge 1 ₂ : second intermediate product 3: box

Claims (3)

A method for manufacturing a packaging container in which a top-side sheet and a bottom-side sheet with spouts are superimposed and the peripheral edge is sealed over the entire circumference,
a preparation step of preparing the top side sheet and the bottom side sheet to which the spout is not attached;
Manufacture of an intermediate product in a flat state by stacking the top side sheet and the bottom side sheet prepared in the preparation step, leaving a part of the peripheral edge as an unsealed edge, and sealing the other peripheral edge. process and
A storage/transport step of packing a large number of intermediate products manufactured in the intermediate product manufacturing step and storing or transporting them;
The intermediate product stored or transferred in the storage/transfer step is taken out of the box, a spout is inserted into the intermediate product from the unsealed edge, and the spout is attached to the top side sheet from the inside. process and
an unsealed edge sealing step of sealing the unsealed edge of the intermediate product to which the spout is attached by the spout attaching step;
A method for manufacturing a packaging container, comprising: 2. The method of manufacturing a packaging container according to claim 1, further comprising a rising step of transforming the packaging container into a box shape after the unsealed edge sealing step. A method for manufacturing the packaging container according to claim 1 or 2,
The top-side sheet has a polygonal top surface at its center,
Each side of the polygonal top surface is a square top side surface having the same number as the number of sides of the polygonal top surface,
A top-side connecting piece is provided at each corner between the mutually adjacent top-side side surfaces to connect and close the top-side side surfaces,
A top-side double-folding ruled line is provided so that the top-side connecting piece can be folded in half so that the sides forming the top-side side surface of the adjacent polygonal shape are aligned with each other,
Outside the top-side side surface and the top-side connecting piece, a top-side fixing portion for fixing to the bottom-side sheet is provided,
The bottom side sheet has a polygonal bottom surface at its center,
Each side of the polygonal bottom surface is a square bottom side surface, and the same number of side surfaces as the number of sides of the polygonal bottom surface are provided,
At each corner between the bottom side surfaces adjacent to each other, a bottom side connecting piece is provided for connecting and closing the bottom side surfaces,
a ruled line for folding the bottom-side connecting piece in two so that the sides forming the bottom-side side surface of the adjacent polygonal shape are aligned with each other;
A method of manufacturing a packaging container, wherein bottom side fixing portions for fixing to the top side sheet are provided outside the bottom side side surface and the bottom side connecting piece.

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