JP2024044559A - Packaging container with spout - Google Patents

Abstract

[Problem] To provide a packaging container that can efficiently package a large number of intermediate products without leaving traces of the spout on adjacent intermediate products even when the intermediate products of the packaging container are packaged in a stacked state. [Solution] A top sheet 1A and a bottom sheet 1B, each having a through hole and a spout 1C attached to the through hole, are stacked and sealed to each other all around the periphery to form a packaging container 1. The spout 1C is composed of a pouring tube 1C1 and a flange 1C2 arranged around the periphery of the pouring tube 1C1. The length 1Cx of the pouring tube 1C1 protruding from the outer surface of the top sheet 1A is set to 7 mm or less. [Selected Figure] Figure 1

Description

The present invention relates to a packaging container that is composed of a top sheet with a spout and a bottom sheet, and the top sheet and the bottom sheet are stacked and fixed to each other along the entire circumference. The present invention relates to a packaging container that is transported and supplied in a flat state and can be raised up and transformed into a box-like state when filled with contents.

Such a packaging container is described in, for example, Patent Document 1.

This packaging container 2 is as follows.

That is, the top sheet 2A used in this packaging container 2 has a rectangular top surface 2A10 in the center, as shown in FIG. 4, and this top surface 2A10 has a through hole in which a spout 2C is attached.

Next, the top-side sheet 2A has rectangular top side surfaces 2A21-2A24, each of which has one side of the rectangular top surface 2A10 as a folding rule. The number of top side surfaces 2A21-2A24 is four, 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 adjacent top side surfaces to connect the top side surfaces 2A21 to 2A24. That is, the top-side side surface 2A21 and the top-side side surface 2A22 are connected by the top-side connecting piece 2A31. 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 top side surfaces. Note that a folding ruled line is provided between each of the top-side side surfaces 2A21 to 2A24 and the top-side connecting pieces 2A31 to 2A34.

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

Next, the top sheet 2A includes a heat seal area that is fixed to the bottom sheet 2B on the outside of a rectangular portion that combines the top side surfaces 2A21 to 2A24 and the top connecting pieces 2A31 to 2A34. It has a top side fixing part 2A40. For convenience of explanation, in FIG. 4, the top-side fixing portion located outside the top-side side surface 2A21 is shown with the reference numeral "2A41."

The top-side connecting pieces 2A31 to 2A34 have a top-side bifolding ruled line that bisects the top-side connecting pieces 2A31 to 2A34 from each vertex of the top surface 2A10. That is, as shown enlarged in FIG. 4, for example, the top side surface 2A23 and the top side surface 2A24 share the apex 2A10b of the top surface 2A10. Among the sides constituting the top-side side surface 2A23, the side that shares the apex 2A10b of the top surface 2A10 is indicated by the reference numeral 2A23b. Further, among the sides forming the top-side side surface 2A24, the side that shares the apex 2A10b of the top surface 2A10 is indicated by the reference numeral 2A24b. Then, a top side bi-folding ruled line 2A33c is provided that bisects the angle formed by the side 2A23b and the side 2A24b, and the top side connecting piece 2A33 is divided into two areas 2A331 by this top side bifolding ruled line 2A33c. , 2A332. That is, in the figure, the angle θ1 between the side 2A23b and the bi-folding ruled line 2A33c is equal to the angle θ2 between the side 2A24b and the top side bi-folding ruled line 2A33c, and the area 2A331 and the area 2A332 have the same shape. They have the same size and are arranged symmetrically with respect to the top side bi-folding ruled line 2A33c as an axis of symmetry.

The top-side folding line 2A33c extends beyond the top-side connecting piece 2A31 and into the top-side fixing part located outside of it. In other words, the top-side folding line 2A33c divides the top-side connecting piece 2A33 into areas 2A331 and 2A332, and also divides the top-side fixing part located outside of it. In the figure, 2A43α is the top-side fixing part located outside the top-side connecting piece 2A33, and of the two areas of the top-side fixing part divided by the top-side folding line 2A33c, it indicates the area located outside of area 2A331, and 2A43β indicates the area located outside of area 2A332. In the packaging container 400 described in Patent Document 1, these areas 2A43α and 2A43β are arranged symmetrically with respect to the top-side folding line 2A33c as the axis of symmetry.

Therefore, when the paper is folded in half along the top-side folding line 2A33c, areas 2A331 and 2A332 are aligned with each other and overlap perfectly, and areas 2A43α and 2A43β are aligned with each other and overlap.

The top-side folding line 2A33c has been described above using the top-side connecting piece 2A33 as an example, but the other top-side connecting pieces 2A31-2A32, 2A34 also have similar top-side folding lines 2A31c-2A32c, 2A34c.

Next, the bottom sheet 2B has the same structure as the top sheet 2A, except for the points described later. That is, as shown in FIG. 5, first, the bottom sheet 2B has a square bottom surface 2B10 in the center. This rectangular bottom surface 2B10 has approximately the same shape as the top surface 2A10. The difference between the bottom sheet 2B and the top sheet 2A is that the top sheet 2A has a through hole in the top surface 2A10, and the spout 2C is attached to this through hole. The bottom surface 2B10 of the seat 2B is not provided with a through hole and, of course, is not equipped with a spout.

The bottom sheet 2B also has four rectangular bottom side surfaces 2B21-2B24, each of which has a rectangular bottom surface 2B10 with each side serving as a folding rule, the same number as the number of sides of the rectangular bottom surface 2B10. These bottom side surfaces 2B21-2B24 are also roughly the same shape as the top side surfaces 2A21-2A24, respectively.

The bottom sheet 2B also has bottom side connecting pieces 2B31-2B34 between adjacent bottom side surfaces 2B21-2B24, which connect and close the bottom side surfaces 2B21-2B24. These bottom side connecting pieces 2B31-2B34 are roughly the same shape as the top side connecting pieces 2A31-2A34.

Next, the bottom sheet 2B has a bottom fixing portion 2B40 consisting of a heat seal area that is fixed to the top sheet 2A on the outside of the rectangular portion formed by the bottom side surfaces 2B21-2B24 and the bottom connecting pieces 2B31-2B34.

A folding line is provided between each bottom side surface 2B21-2B24 and the bottom connecting pieces 2B31-2B34. Each bottom connecting piece 2B31-2B34 is provided with a bottom folding line 2B31c-2B34c that bisects the bottom connecting pieces 2B31-2B34 from each vertex of the bottom surface 2B10, and the bottom folding line 2B31c-2B34c extends beyond the bottom connecting piece 2B31 to the bottom fixing part located on the outside. In other words, the bottom folding line 2B31c-2B34c bisects the bottom connecting pieces 2B31-2B34 and also bisects the bottom fixing part located on the outside.

Then, the top side sheet 2A and the bottom side sheet 2B are aligned and overlapped, and both fixing parts 2A40 and 2B40 are heat-sealed to each other, thereby producing a first intermediate product (packaging container in a flat state) ₂₁ can be manufactured (see Figure 6). The packaging container 2 can thus be boxed and transported in a flat state, and then supplied to the step of filling and sealing the contents.

Although this first intermediate product ₂₁ is in a flat state, for the convenience of the post-process of transforming it into a box-shaped state, the bending lines of the top sheet 2A and the bottom sheet 2B are Each of the folding lines is slightly temporarily folded, and the first intermediate product ₂₁ swells slightly outward to form a space 2X inside. When the first intermediate product ₂₁ , which has been temporarily folded so as to bulge outward in this manner, is deformed, the first intermediate product ₂₁ naturally and easily deforms into a box shape.

In the first intermediate product ₂₁ having a shape that bulges slightly outward, the flange 2C2 of the spout 2C is joined to the inside of the top-side sheet 2A, and the spout tube 2C1 of the spout 2C protrudes toward the outside of the top-side sheet 2A.

Next, in order to transform the first intermediate product ₂₁ in a flat state into a box-like state, the top side sheet 2A and the bottom side sheet 2B are each folded along their folding lines and then stood up. .

7 shows the second intermediate product ₂₂ thus transformed into a box-like shape. In the box-like second intermediate product ₂₂ thus formed, the top-side connecting pieces 2A31-2A34 and the bottom-side connecting pieces 2B31-2B34 are folded in half so that the top-side folding lines 2A31c-2A34c and the bottom-side folding lines 2B31c-2B34c located in the center form mountain folds with respect to the outer surface of the container. This folding causes the sides constituting the adjacent sides of the top-side side surfaces 2A21-2A24 of the top-side sheet 2A to overlap with each other, and also causes the two areas divided by the top-side folding lines 2A31c-2A34c to overlap with each other to form the top side of the fin-like panel. 4, the top-side connecting piece 2A33 will be described. By folding the top-side connecting piece 2A33 in half along the top-side folding line 2A33c, the edge 2A23b of the top-side side surface 2A23 and the edge 2A24b of the top-side side surface 2A24 located on both sides of the top-side connecting piece 2A33 overlap each other. In addition, the two regions 2A331 and 2A332 of the connecting piece 2A33 separated by the top-side folding line 2A33c overlap each other, and the region 2A43β and the region 2A43α of the top-side fixing portion 2A40 overlap each other to form the top side of the fin-like panel protruding outward from each corner of the second intermediate product ₂₂ .

In the first intermediate product ₂₁ 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 overlap precisely, and the top-side folding line 2A33c and the bottom-side folding line 2B33c also overlap precisely with each other, so that when the top-side connecting piece 2A33 of the top-side sheet 2A is folded in half along the top-side folding line 2A33c, the bottom-side connecting piece 2B33 of the bottom-side sheet 2B is also folded in half along the bottom-side folding line 2B33c. As a result, the edges 2B23b of the bottom side surface 2B23 and the edges 2B24b of the bottom side surface 2B24 located on both sides of the bottom side connecting piece 2B33 also overlap each other, and the two areas of the bottom side connecting pieces 2B31 to 2B34 separated by the bottom side folding line 2B33c and the two areas of the bottom side fixed portion 2B40 located outside thereof also overlap each other, forming fin-shaped panels 233 that protrude outward from each corner of the second intermediate product ₂₂ .

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 part 240, the box-shaped state is formed by these both side surfaces 2A23 and 2B23. A side surface 223 of the second intermediate product 2 ₂ is configured.

Furthermore, 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 part 240, the two connecting pieces 2A33 and 2B33 are configured. The portions connect and close the side surfaces. That is, the side surface 223 composed of the top side surface 2A23 and the bottom side surface 2B23 and the side surface 224 composed of the top side surface 2A24 and the bottom side surface 2B24 are connected, and there is a gap here. This is done to prevent this from occurring.

The above describes an example in which the portion made up of the top connecting piece 2A33 and the bottom connecting piece 2B33 is folded in half, but the same applies to the other connecting pieces.

By folding all of the connecting pieces 2A31-2A34, 2B31-2B34 in half in this manner, the side surfaces 221-224 are formed, and the second intermediate product ₂₂ is folded along the predetermined folding lines to assume a box-like shape. The second intermediate product ₂₂ in this box-like shape has a top surface 2A10 and a bottom surface 2B10, with the side surfaces 221-224 provided around them, and since the connecting pieces 2A31-2A34, 2B31-2B34 close the spaces between the side surfaces 221-224, the product is sealed except for the through hole to which the spout 2C is attached.

Note that instead of folding the connecting pieces 2A31 to 2A34 and 2B31 to 2B34 in half, air is blown into the first intermediate product ₂₁ in a flat state, and each side surface 221 to 224 is raised to form a box-shaped state. It is also possible to form a second intermediate product ₂₂ . Even in this case, the second intermediate product ₂₂ formed has the same shape as the second intermediate product ₂₂ formed by folding each of the connecting pieces 2A31 to 2A34 and 2B31 to 2B34 in half.

By the way, in this box-shaped state, as shown in FIG. 234, and these fin-like panels 231 to 234 protrude outward from each corner of the intermediate product ₂₂ . Therefore, by folding these fin-shaped panels 231 to 234 over each side surface 221 to 224 of the intermediate product ₂₂ and gluing them, the appearance can be adjusted. FIG. 8 shows a packaging container 2 manufactured by folding the fin-shaped panels 231 to 234 onto each side surface 221 to 224 of the intermediate product ₂₂ in this manner.

As can be seen from the above explanation, all of the top side connecting pieces 2A31 to 2A34 and bottom side connecting pieces 2B31 to 2B34 of the first intermediate product ₂₁ in a flat state are folded along these bi-folding ruled lines 2A31c to 2A34c and Fin-shaped panels 231 to 234 are made by folding in half 2B31c to 2B34c, and then the fin-shaped panels 231 to 234 are folded over each side 221 to 224 of the intermediate product ₂₂ to form a box shape. It can be transformed into a packaging container 2.

Then, the flat first intermediate product ₂₁ can be supplied to a process of filling and sealing the contents. Also, it can be sealed with a cap or equipped with a dispenser pump.

After using this box-shaped packaging container 2, when it becomes empty, it can be returned from the box-shaped state to a flat state. For example, as described above, the first intermediate product ₂₁ in a flat state is supplied to the filling process, and in this process it is transformed into a box-shaped packaging container 2, filled and sealed, and transported in this state. After the product is sold, when the content is emptied by the consumer, it can be reduced in volume to the first intermediate product ₂₁ in a flat state and stored or disposed of.

In order to deform the packaging container 2 from the box-shaped state into a flat state, the fin-like panels 231-234 are peeled off from the container side surfaces 221-224, and the container fixing portion 240 is grasped and pulled outwardly from the packaging container 2. By pulling the container fixing portion 240 outwardly, the folded connecting pieces 231-234 open, and the packaging container 2 is deformed into the first intermediate product ₂₁ in a flat state.

JP2019-26275A

By the way, as described above, the packaging container 2 is boxed and transported as the first intermediate product ₂₁ in a flat state. FIG. 9 shows a state in which the first intermediate product ₂₁ is packed in a packaging box in this way, and FIG. 9(a) is an explanatory plan view thereof, and FIG. 9(b) is an explanatory cross-sectional view thereof. be.

As can be seen from these figures, since the first intermediate products 2 ₁ in a flat state are stacked on top of each other and packed, the bottom sheet 2B of the first intermediate products 2 ₁ contains adjacent first intermediate products. The spout 2C1 of the spout 2C of ₂₁ sometimes came into contact with the spout 2C, leaving a trace there.

In addition, since the first intermediate product _2-1 has a bulged shape formed by slightly pre-folding each of the folding lines, the volume of the first intermediate product 2-1 is increased accordingly, and the product cannot be efficiently accommodated in a box having a limited volume, which reduces the efficiency of the transportation process or storage process.

Therefore, an object of the present invention is to provide a packaging container that does not leave spout marks on adjacent intermediate products even when such intermediate products are packaged in a stacked state. Additionally, an object of the present invention is to provide a packaging container that can efficiently pack a large number of intermediate products.

That is, the invention according to claim 1 is composed of a top side sheet and a bottom side sheet that have a through hole and a spout is attached to the through hole, and these top side sheet and bottom side sheet A packaging container configured by overlapping and sealing each other around the entire circumference,
The spout comprises a spout tube and a flange arranged around the spout tube,
The packaging container with a spout is characterized in that the length of the spout tube protruding from the outer surface of the top sheet is 7 mm or less.

Note that it is desirable that the outer tip of the spouting tube be chamfered.

Further, it is desirable that the length of the pouring tube protruding from the inner surface of the top side sheet is 3 mm or more.

The top sheet and the bottom sheet may each have the following structure: Top sheet structure:
It has a polygonal top surface in the center,
The polygonal top surface has a number of rectangular top side surfaces, each of which has one side equal to the number of sides of the polygonal top surface.
Between adjacent top side surfaces, there is a top side connecting piece that connects and closes the top side surfaces,
The top side surface and the top side connecting piece have a top side fixing part on the outside thereof for fixing to the bottom side sheet,
A top-side folding line is provided along which the top-side connecting piece can be folded in half so that the sides constituting the top-side side surfaces of adjacent rectangular shapes coincide with each other.
Bottom sheet construction:
It has a polygonal base in the center,
The polygonal bottom has a rectangular bottom side surface, each side of which is a side, and the number of sides of the polygonal bottom is the same as the number of sides of the polygonal bottom,
Between adjacent bottom side surfaces, there is a bottom side connecting piece that connects and closes the bottom side surfaces,
The bottom side surface and the bottom side connecting piece have a bottom side fixing part on the outside thereof for fixing to the top side sheet,
A bottom-side folding line is provided along which the bottom-side connecting piece can be folded in half so that the sides constituting the bottom side surfaces of adjacent rectangular shapes coincide with each other.

According to the present invention, the length of the spout protruding from the outer surface of the top sheet is short, at 7 mm or less, so that even when flat intermediate products are packed in a stacked state, no traces of the spout remain on adjacent intermediate products. Also, for the same reason, the apparent volume is small, so that a large number of intermediate products can be efficiently packed in a box with a limited volume.

Fig. 1 relates to an embodiment of the packaging container of the present invention, Fig. 1(a) is a sectional view of a first intermediate product (packaging container in a flat state), and Fig. 1(b) is an enlarged view of the main part thereof. be. Fig. 2 shows an embodiment of the packaging container of the present invention. That is, Fig. 2(a) is an explanatory perspective view showing a process of mounting a dispenser pump to the packaging container, and Fig. 2(b) is an explanatory perspective view of the packaging container with the dispenser pump mounted. Fig. 3 shows an embodiment of the packaging container of the present invention. That is, Fig. 3(a) is an explanatory plan view showing a state in which a first intermediate product of the packaging container is packed in a packaging box, and Fig. 3(b) is an explanatory sectional view thereof. FIG. 4 is a plan view of a top sheet of a conventional packaging container. FIG. 5 is a plan view of a bottom sheet of a conventional packaging container. FIG. 6 is a sectional view of a first intermediate product (a flat packaging container) related to a conventional packaging container. FIG. 7 is a perspective view of a second intermediate product related to a conventional packaging container, which is obtained by transforming a first intermediate product (a flat packaging container) into a box shape. FIG. 8 is a perspective view of a conventional packaging container. Fig. 9 shows a conventional packaging container. That is, it shows a state in which a first intermediate product of the packaging container is packed in a packaging box, Fig. 9(a) is an explanatory plan view thereof, and Fig. 9(b) is an explanatory cross-sectional view thereof.

The following describes an embodiment of the present invention with reference to the drawings.

The packaging container 1 according to the embodiment of the present invention is similar to the conventional packaging container 2, except for the spout attached to the top sheet. That is, the packaging container 1 according to the embodiment of the present invention is composed of a top sheet 1A and a bottom sheet 1B having a through hole with a spout 1C attached to the through hole, and is a packaging container constructed by overlapping the top sheet 1A and the bottom sheet 1B and sealing them together all around the periphery, and the top sheet 1A and the bottom sheet 1B each have the following structure.
Top sheet structure:
It has a polygonal top surface in the center,
The polygonal top surface has a number of rectangular top side surfaces, each of which has one side equal to the number of sides of the polygonal top surface.
Between adjacent top side surfaces, there is a top side connecting piece that connects and closes the top side surfaces,
The top side surface and the top side connecting piece have a top side fixing part on the outside thereof for fixing to the bottom side sheet,
A top-side folding line is provided along which the top-side connecting piece can be folded in half so that the sides constituting the top-side side surfaces of adjacent rectangular shapes coincide with each other.
Bottom sheet construction:
It has a polygonal base in the center,
The polygonal bottom has a rectangular bottom side surface, each side of which is a side, and the number of sides of the polygonal bottom is the same as the number of sides of the polygonal bottom,
Between adjacent bottom side surfaces, there is a bottom side connecting piece that connects and closes the bottom side surfaces,
The bottom side surface and the bottom side connecting piece have a bottom side fixing part on the outside thereof for fixing to the top side sheet,
A bottom-side folding line is provided along which the bottom-side connecting piece can be folded in half so that the sides constituting the bottom side surfaces of adjacent rectangular shapes coincide with each other.

Therefore, in the drawings illustrating the conventional packaging container 2, the elements constituting the conventional packaging container 2 are given numerals starting with the first numeral "2", but according to the embodiment of the present invention The packaging container 1 is numbered starting with the leading number "1", and both are numbered in correspondence with each other except for this leading number. For example, the conventional packaging container 2 is designated by the symbol "2", and the specific example of the packaging container of the present invention is designated by the symbol "1". Further, the top sheet of the conventional packaging container 2 is designated with the symbol "2A", and the top sheet of the packaging container 1 of the present invention is designated with the symbol "1A". Further, the first intermediate product (flat packaging container) of the conventional packaging container 2 is given the symbol "2 ₁ ", and the first intermediate product (flat packaging container) of the packaging container 1 of the present invention is The packaging containers (in the same condition) are marked with the symbol "1 ₁ ".

Fig. 1 relates to an embodiment of a packaging container 1 according to the present invention, and Fig. 1(a) shows a cross section of a first intermediate product (a packaging container in a flat state) _11. Fig. 1(b) is an enlarged view of a main part thereof.

As illustrated, the spout 1C is composed of a spout tube 1C1 and a flange 1C2 that is integral with the spout tube 1C1 and arranged around the spout tube 1C1.

The dispensing tube 1C1 is cylindrical, and its interior constitutes a dispensing path for the contents. On the other hand, the flange 1C2 plays a role in fixing the spout 1C to the top sheet 1A of the packaging container 1.

The dispensing tube 1C1 is inserted into the through hole of the top sheet 1A from inside the packaging container 1, with its tip protruding to the outside of the packaging container 1. The flange 1C2 is then in close contact with the periphery of the through hole of the top sheet 1A and is fixed in place by heat sealing.

In the conventional spout 2C, the flange 2C2 is provided at the end of the dispensing tube 2C1. In contrast, in the spout 1C according to the embodiment of the present invention, the flange 1C2 is located midway through the dispensing tube 1C1, and therefore the dispensing tube 1C1 has a portion that extends from the flange 1C2 further toward the inside of the packaging container 1. On the other hand, the portion that protrudes to the outside of the packaging container 1 is configured to be significantly shorter than that of the conventional spout 2C.

That is, the length of the spout 1C protruding from the outer surface of the top sheet 1A (the protruding length 1Cx to the outer surface is 7 mm or less. If this exceeds 7 mm, the packaging container 1 is removed as shown in FIG. 3). When stacked, a mark is created by the spout 1C being pressed against the packaging container 1 that the spout 1C comes into contact with.A trace of the spout 1C is also created when packaging containers 1 in a box shape are stacked together, and if the packaging container 1 is flat. Even when intermediate products 1 ₁ in a similar state are stacked together, traces of the spout 1C will appear on the intermediate product 1 ₁ that the spout 1C comes into contact with.In addition, the protrusion length 1Cx of the spout 1C to the outside surface is 3 mm or less. It is desirable that

In addition, when the protruding length 1Cx of the spout 1C to the outer surface is short, such as 7 mm or less, the apparent volume of the packaging container ₁ in a box-shaped state or the intermediate product 11 in a flat state is small, so that it can be efficiently accommodated in a box body of limited volume, thereby improving the efficiency of the transport process or storage process. Of course, the longer the length 1Cx, the larger the apparent volume of the packaging container ₁ in a box-shaped state or the intermediate product 11 in a flat state becomes, so that it cannot be efficiently accommodated in a box body, and the transport efficiency and storage efficiency also decrease.

Note that the inner tip and outer tip ^1C10 of the spout tube 1C1 of the spout 1C are chamfered to prevent sharp parts from forming in these portions, as shown in a further enlarged view of FIG. 1(b). Therefore, even if the pouring tube 1C1 comes into contact with an adjacent packaging container 1, the adjacent packaging container 1 will not be damaged, and traces of the pouring tube 1C1 will be less likely to occur. In addition, the outer tip 1C1 of the pouring cylinder 1C1
Although only the inner and outer tips 1C10 may be chamfered, it is desirable that both the inner and outer tips ^1C10 be chamfered.

Next, as mentioned above, the dispensing tube 1C1 of the spout 1C has a portion that extends from the flange 1C2 toward the inside of the packaging container 1. Therefore, even though the protruding length 1Cx of the spout 1C to the outer surface is short at 7 mm or less, the dispensing tube 1C1 has a sufficient length. This dispensing tube 1C1 of sufficient length can be used to attach, for example, a dispenser pump. Figure 2 shows the process of attaching a dispenser pump to the packaging container 1 in this box-shaped state, with Figure 2(a) being an explanatory perspective view showing the process of attaching a dispenser pump to the packaging container, and Figure 2(b) being an explanatory perspective view of the packaging container with the dispenser pump attached.

In addition, since it is difficult to provide a thread on the outside of the spout 1C, it is preferable that the spout 1C be internally threaded and the dispenser pump be externally threaded. Even when an intermediate part is used between the spout 1C and the dispenser pump, the spout 1C is internally threaded.

The length of the spout protruding from the inner surface of the top sheet 1A (protruding length to the inner surface) 1Cy is preferably 3 mm or more. Even if the protruding length 1Cx to the outer surface is short, at 7 mm or less, if the protruding length 1Cy of the spout to the inner surface is 3 mm or more, the dispenser pump can be easily and securely fixed. On the other hand, if the length 1Cy is shorter than this, it is difficult to fix the dispenser pump. The dispenser pump can be attached by screwing or fitting.

(Conventional example)
The packaging container 2 according to this conventional example is the same as the packaging container described in the "Background Art" section with reference to Figures 5 to 9. The outer diameter of the spout is 31 mm. The length of the spout 2C protruding from the outer surface of the top sheet 2A is 12 mm. The length of the spout 2C protruding from the inner surface of the top sheet 2A is 2 mm or less, which is essentially 0 mm.

As shown in FIG. 9, this was packed into a specified packaging box. That is, the packaging containers 2 were arranged in a matrix of two rows and three columns, and the packaging containers 2 in this arrangement were stacked and packed into a box.

As a result, as shown in FIG. 9(b), the packaging containers 2 could be stacked up to four layers high, and the packaging box could accommodate 24 packaging containers 2.

On the other hand, when the packaging containers 2 that had been stacked and packed in this way were removed and checked, traces of the spout 2C's dispensing tube 2C1 being pressed against the bottom sheet 2B of the packaging container 2 stacked on the top layer were still present.

Example 1
The packaging container 1 according to this Example 1 is similar to the conventional packaging container 2, except for the shape of the spout 1C. That is, in the packaging container 1 according to this Example 1, the protruding length 1Cx of the spout 1C to the outer surface of the top sheet 1A is set to 2 mm, and both the inner and outer ends ^1C10 of the pouring tube 1C1 are chamfered to form smooth curved surfaces. Also, the protruding length 1Cy of the spout 1C to the inner surface of the top sheet 1A is set to 8 mm.

The packaging containers 1 according to Example 1 were packed in the same packaging box as that used in the conventional example. The packing method was also the same as that of the conventional example. That is, the packaging containers 1 were arranged in a matrix of two rows and three columns, and the packaging containers 1 in this arrangement were stacked and packed in the box.

As a result, as shown in FIG. 3(b), the packaging containers 1 could be boxed in seven stacks, and 42 packaging containers 1 could be accommodated in this packaging box.

Furthermore, when the packaging containers 1 were removed from the packaging box and inspected, no traces of the spout 1C's dispensing tube 1C1 being pressed against the bottom sheet 1B of any of the packaging containers 1 stored in any tier were found.

After removing the packaging container 1 from the packaging box, a dispenser pump could be attached and fixed in place.

Example 2
In the packaging container 1 according to the second embodiment, the length 1Cy of the spout 1C protruding from the inner surface of the top sheet 1A is set to 2 mm.

When the packaging container 1 according to Example 2 was packed in the same packaging box as the packaging box used in the conventional example, it was possible to pack the packaging container 1 in 7 tiers as in Example 1, and this packaging box contained 42 containers. of packaging containers 1 could be accommodated. Furthermore, no trace of the spout 1C's pouring cylinder 1C1 being pressed against the bottom sheet 1B of any of the packaging containers 1 was found.

However, there were cases where the dispenser pump was not properly fixed and could not be sealed.

(Comparative example)
In the packaging container according to this comparative example, the protruding length of the spout to the outer surface of the top sheet was 8 mm. The rest is the same as in Example 1.

When the packaging containers according to the comparative example were packed in the same packaging box as the conventional example, they could be packed in six layers, and 36 packaging containers 1 could be accommodated in the packaging box.

However, when the stacked and boxed packaging containers were taken out and inspected, traces of the spout's dispensing tube being pressed against them remained on the bottom sheets of the packaging containers stacked on top.

1: Paper container 1 ₁ : First intermediate product of paper container (flat packaging container)
1A: Top sheet 1B: Bottom sheet 1C: Spout 1C1: Spout tube ^1C10 : Tip of spout tube 1Cx: Spout protruding length on outer surface 1Cy: Spout protruding length on inner surface 1C2: Flange

Claims (4)

A packaging container is constructed by stacking a top sheet and a bottom sheet each having a through hole and a spout attached to the through hole, and sealing the top sheet and the bottom sheet together around the entire periphery,
The spout comprises a pouring tube and a flange disposed around the pouring tube,
A spout-equipped packaging container, characterized in that the length of the spout tube protruding from the outer surface of the top sheet is 7 mm or less. The packaging container with a spout according to claim 1, wherein the outer tip of the spout tube is chamfered. The packaging container with a spout according to claim 1, wherein the spout tube protruding from the inner surface of the top sheet has a length of 3 mm or more. 2. The packaging container according to claim 1, wherein the top sheet and the bottom sheet each have the following structure:
Top sheet structure:
It has a polygonal top surface in the center,
The polygonal top surface has a number of rectangular top side surfaces, each of which has one side equal to the number of sides of the polygonal top surface.
Between adjacent top side surfaces, there is a top side connecting piece that connects and closes the top side surfaces,
The top side surface and the top side connecting piece have a top side fixing part on the outside thereof for fixing to the bottom side sheet,
A top-side folding line is provided along which the top-side connecting piece can be folded in half so that the sides constituting the top-side side surfaces of adjacent rectangular shapes coincide with each other.
Bottom sheet construction:
It has a polygonal base in the center,
The polygonal bottom has a rectangular bottom side surface, each side of which is a side, and the number of sides of the polygonal bottom is the same as the number of sides of the polygonal bottom,
Between adjacent bottom side surfaces, there is a bottom side connecting piece that connects and closes the bottom side surfaces,
The bottom side surface and the bottom side connecting piece have a bottom side fixing part on the outside thereof for fixing to the top side sheet,
A bottom-side folding line is provided along which the bottom-side connecting piece can be folded in half so that the sides constituting the bottom side surfaces of adjacent rectangular shapes coincide with each other.

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