JP2023169804A - Packaging container, blank material used for manufacturing packaging container, and manufacturing method of packaging container - Google Patents

Abstract

To provide a packaging container with an interior partition formed by using a sheet material, a blank material used for manufacturing the packaging container, and a manufacturing method of the packaging container.SOLUTION: The packaging container includes: a box-shaped body portion having a bottom and side portions, and one side opening; a sheet material comprising a flat flange portion extending outward from the periphery of the open side of the body portion; a liner material sealed to the inner surface of the body portion and the outer surface of the flange portion; a slit-shaped opening in the bottom portion of the body portion; and a hollow partition formed by a portion of the liner material in the interior of the body portion that overlaps the opening.SELECTED DRAWING: Figure 1

Description

The present invention relates to a packaging container made of a sheet material, a blank material used for manufacturing the packaging container, and a method for manufacturing the packaging container.

In recent years, from the viewpoint of environmental protection and resource conservation, there has been a demand for a reduction in the amount of resin used in packaging containers, and various packaging containers using paper are being considered. For example, Patent Document 1 describes a paper container mainly made of paper, which includes a paper container body assembled from a single blank and an internal protective film layer.

Patent No. 4305981 specification

The paper container described in Patent Document 1 has a problem in that the contained contents move because there is no compartmentalization within the container. Therefore, when the paper container described in Patent Document 1 is used, for example, as a lunch box container, it is necessary to separately use a tray for dividing the contents in order to suppress movement of the contents, and there is room for improvement in terms of usability. was there.

Therefore, an object of the present invention is to provide a packaging container formed using a sheet material and having a partition inside, a blank material used for manufacturing the packaging container, and a method for manufacturing the packaging container.

A packaging container according to an embodiment of the present invention includes a box-shaped main body with one side open and having a bottom and a side surface, and a flat flange extending outward from the periphery of the open surface of the main body. and a liner material that is sealed to the inner surface of the main body and the outer surface of the flange. A hollow partition formed by a portion of the liner material is provided in the overlapping portion.

A blank material used for manufacturing a packaging container according to an embodiment of the present invention includes a ring part having a rectangular shape corresponding to a flange part, and a pair of opposing first sides connected to each other at the inner peripheral edge of the ring part. , a pair of first side panels corresponding to a part of the side part, a first bottom panel connected to each of the pair of first side panels and corresponding to a part of the bottom part, and an inner part of the ring part. a pair of second side panels connected to each of the pair of second sides adjacent to the first side at the periphery and corresponding to the other part of the side surface; The device includes a pair of second bottom panels connected to each other and corresponding to a part of the bottom portion, and an opening for forming the opening is formed in the first bottom panel.

A method for manufacturing a packaging container according to an embodiment of the present invention includes a mold having a recess that is complementary to the outer shape of the main body, and a protrusion that protrudes from the inner surface of the recess and can be inserted into the opening of the bottom part. The above-mentioned bent blank material was set, a pair of first side panels and a pair of second side panels constituted a side part, and the pair of first side panels were divided into one side and the other side. The first bottom panel and the pair of second bottom panels constitute a bottom part having an opening, the ring part constitutes a flange part, and the convex part inserted through the opening in the bottom part is inserted into the inside of the main body part. a step of sealing the liner material to the inner surface of the main body portion and the outer surface of the flange portion, and forming a part of the liner material along the outer surface of the convex portion of the mold to form a partition. Equipped with.

A packaging container according to another embodiment of the present invention includes a box-shaped main body with one side open and having a bottom surface and a side surface, and a flat flange portion extending outward from the periphery of the open surface of the main body. and a sheet material constituting a partition provided inside the main body, and a liner material sealed to the inner surface of the main body, the outer surface of the flange, and the outer surface of the partition.

A blank material according to another embodiment of the present invention includes a ring portion having a rectangular shape corresponding to the flange portion, and one first side of a pair of opposing first sides at the inner peripheral edge of the ring portion. and a part of the other first side opposite to the part, a pair of first side panels corresponding to a part of the side part, and a pair of first side panels. A first bottom panel corresponding to a part of the bottom part, the other part of one first side of the inner peripheral edge of the ring part, and the other part of the other first side. a pair of second side panels connected to each of the pair of second side panels and corresponding to a part of the side surface; and a second bottom surface connected to each of the pair of second side panels and corresponding to a portion of the bottom surface. a pair of third side panels connected to each of the pair of second sides adjacent to the first side at the inner peripheral edge of the ring portion and corresponding to the other part of the side portion; A pair of third bottom panels are connected to each of the third side panels and correspond to a part of the bottom surface part, and a pair of partition panels are connected to each of the third bottom panels and correspond to a partition.

A method for manufacturing a packaging container according to another embodiment of the present invention includes a recess that is complementary to the outer shape of the main body, a pair of first side panels and a pair of second side panels that protrude from the inner surface of the recess. A bent blank material is set in a mold having a convex portion that can be inserted between the two, and by bending the blank material, a pair of first side panels, a pair of second side panels, and a pair of side panels are formed. A first bottom panel that is divided into two parts, one side and the other side of the pair of first side panels, and one side and the other side of the pair of second side panels. The bottom part is made up of the bisected second bottom panel and the pair of third bottom panels, the flange part is made up of the ring part, and the pair of first side panels and the pair of second side panels make up the bottom part. The protrusion inserted between the two is made to protrude inside the main body part, and the pair of partition panels are arranged along the protrusion that protrudes between the pair of first side panels and the pair of second side panels. and a step of sealing a liner material to the inner surface of the main body, the outer surface of the flange, and the outer surface of the partition with each of the pair of partition panels aligned with the outer surface of the convex portion of the mold. .

According to the present invention, it is possible to provide a packaging container formed using a sheet material and having a partition inside, a blank material used for manufacturing the packaging container, and a method for manufacturing the packaging container.

A perspective view of a packaging container according to the first embodiment Cross-sectional view along the II-II line shown in Figure 1 Cross-sectional view along line III-III shown in Figure 1 Developed view of the blank material used to manufacture the packaging container shown in Figure 1 A plan view of the blank material used to manufacture the packaging container shown in Figure 1. Cross-sectional view along the VI-VI line shown in Figure 5 A cross-sectional view schematically showing the method for manufacturing the packaging container shown in Figure 1. A cross-sectional view schematically showing the method for manufacturing the packaging container shown in Figure 1. A cross-sectional view schematically showing the method for manufacturing the packaging container shown in Figure 1. A cross-sectional view schematically showing the method for manufacturing the packaging container shown in Figure 1. A cross-sectional view schematically showing the method for manufacturing the packaging container shown in Figure 1. A cross-sectional view schematically showing another example of the method for manufacturing the packaging container shown in FIG. 1 A plan view showing a blank material used for manufacturing a packaging container according to a modification of the first embodiment A perspective view of a packaging container according to a second embodiment Cross-sectional view along the XI-XI line shown in Figure 10 Cross-sectional view along line XII-XII shown in Figure 10 Developed view of the blank material used to manufacture the packaging container shown in Figure 10 A plan view of the blank material used for manufacturing the packaging container shown in FIG. Cross-sectional view along the XV-XV line shown in Figure 14 A cross-sectional view schematically showing the method for manufacturing the packaging container shown in FIG. A cross-sectional view schematically showing the method for manufacturing the packaging container shown in FIG. A cross-sectional view schematically showing the method for manufacturing the packaging container shown in FIG. A cross-sectional view schematically showing the method for manufacturing the packaging container shown in FIG. A cross-sectional view schematically showing the method for manufacturing the packaging container shown in FIG. A perspective view of a packaging container according to a modification of the second embodiment Developed view of the blank material used to manufacture the packaging container shown in Figure 17 A sectional view showing a packaging container according to another modification of the first embodiment

Embodiments of the present invention will be described below with reference to the drawings. In each figure, a broken line indicates a portion hidden behind or on the back side of the extracted area.

(First embodiment)
1 is a perspective view of the packaging container according to the first embodiment, FIG. 2 is a sectional view taken along line II-II shown in FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-II shown in FIG. FIG. 3 is a sectional view taken along line III.

The packaging container 100 includes a sheet material 1 and a liner material 2.

The sheet material 1 is a sheet that serves as a base material for the packaging container 100, and includes a box-shaped main body portion 10 with one side open and a flange portion 11 extending outward from the periphery of the open surface (opening) of the main body portion 10. constitutes. The outer surface (the upper surface in FIGS. 1 to 3) of the flange portion 11 is a flat surface. In this embodiment, the main body portion 10 has a rectangular shape in plan view, and includes a bottom portion 12 and four side portions 13a to 13d. The bottom portion 12 is provided with a slit-shaped opening 14 extending in the longitudinal direction of the bottom portion 12 .

The sheet material 1 is preferably made of a material mainly made of paper. For example, paperboard having a basis weight of 100 to 500 g/m ² can be used as the base material of the sheet material. The basis weight of the paperboard used as the base material is preferably 190 to 400 g/m ² because it provides excellent processability. The sheet material may have one or more layers such as a resin film, a barrier layer, a sealant layer, a paper protective layer, an ink layer (printing layer), an overcoat varnish layer, etc., as necessary. However, in order to reduce the amount of resin used, it is preferable that the proportion of paper in each sheet material is 50% by mass or more. Of both surfaces of the sheet material, it is preferable to use a material that can be welded to the liner material 3 on the surface where the liner material 2 described below is sealed.

The liner material 2 is made of a resin film and is sealed to the inner surface (box-shaped inner surface) of the main body section 10 and the outer surface of the flange section 11. The liner material 2 has the role of integrating each surface constituting the main body part 10 and the flange part 11 and imparting strength to the entire packaging container 100. The material of the liner material 2 is not particularly limited, but a thermoplastic resin film having water resistance, airtightness, and heat sealability can be suitably used. Further, the liner material 2 may be a single layer film, a laminated film in which a plurality of resin layers are laminated by extrusion, or a laminated film in which a plurality of resin layers are laminated via an adhesive layer. Examples of thermoplastic resins that can be used for the liner material 2 include polyethylene (PE), polypropylene (PP), polyamide, polyester, ethylene-vinyl acetate copolymer (EVOH), ethylene-acrylic acid copolymer, and polyvinyl alcohol. , ethylene-vinyl alcohol copolymer, polybutene, polyvinylidene chloride, polystyrene, and the like. For example, as the liner material 2, a polyethylene barrier multilayer film having a layer structure of PE (20 μm)/adhesive layer/EVOH (10 μm) adhesive layer/PE (20 μm) or CPP (unstretched polyethylene, 20 μm)/ A polypropylene barrier multilayer film having a layer structure of adhesive layer/EVOH/adhesive layer/CPP can be used.

The method of sealing the liner material 2 to the sheet material 1 is not particularly limited. However, it is preferable that the liner material 2 is separable from the sheet material 1. When the liner material 2 is made peelable from the main body part 10, for example, the liner material 2 may be sealed on the entire outer surface of the flange part 11, while partially sealed on the inner surface of the main body part 10. Alternatively, the liner material 2 may be made removable by sealing it to the sheet material 1 via a release varnish layer or an easy peelant film. When the liner material 2 is removable from the sheet material 1, by separating the two, the sheet material 1, which is mainly made of paper, can be recycled, and the liner material 3, which is a resin film, is also easy to dispose of. Note that a lid material etc. may be sealed on the outer surface of the flange portion 11 of the packaging container 100, and in this case, the sealing strength between the lid material etc. and the liner material 2 is greater than the sealing strength between the liner material 2 and the sheet material 1. adjusted to be smaller.

A partition 15 extending in the longitudinal direction of the bottom portion 12 is provided inside the main body portion 10 of the packaging container 100. The partition 15 is provided in a portion that overlaps with the opening 14 provided in the bottom surface 12 of the main body 10, and divides the inside of the main body 10 into a storage space on the side surface portion 13b side and a storage space on the side surface portion 13d side. partition into. As shown in FIGS. 2 and 3, the partition 15 is hollow, and the width (thickness) in the direction perpendicular to the stretching direction of the partition 15 (the left-right direction in FIGS. 2 and 3) decreases as it moves away from the bottom part 12. ing. The partition 15 is formed by molding a part of the liner material 2, and the molding method will be described later.

FIG. 4 is a developed view of the blank material used for manufacturing the packaging container shown in FIG. 1, FIG. 5 is a plan view of the blank material used for manufacturing the packaging container shown in FIG. 1, and FIG. 6 is a sectional view taken along the line VI-VI shown in FIG. 5. FIG.

The blank material 110 shown in FIG. 5 is made by punching out a member having the shape shown in FIG. 4 from a single sheet material, partially bending the punched member, and bonding the part overlapping with the ring part 21 with adhesive or the like. be.

The blank material 110 includes a ring portion 21, a pair of first side panels 22a and 22b, a first bottom panel 23, a pair of second side panels 24a and 24b, and a pair of second bottom panels 25a. and 25b. Each of the above-mentioned parts is integrally constructed of the same sheet material. Incidentally, in the inner region of the ring portion 21, openings 27a, 27b, and 28 are formed by punching out a sheet material (see FIG. 4).

The ring portion 21 has a rectangular ring shape. The ring portion 21 is a portion that constitutes the outer surface of the flange portion 11 shown in FIG. The inner peripheral edge of the ring portion 21 is rectangular and has a pair of opposing first sides 101a and 101b and a pair of adjacent and opposing second sides 102a and 102b.

The first side panel 22a is connected to a first side 101a (one short side) at the inner peripheral edge of the ring portion 21. Similarly, the first side panel 22b is connected to a first side 101b (the other short side) opposite to the first side 101a at the inner peripheral edge of the ring portion 21. The first side panels 22a and 22b are parts that constitute the side sections 13c and 13a shown in FIG. 1, respectively.

The first bottom panel 23 is connected to each of the first side panels 22a and 22b. The first bottom panel 23 is a part that constitutes a part of the bottom part 12 shown in FIG. An opening 28 is formed in the first bottom panel 23 and extends in a direction perpendicular to the one side of the inner periphery of the ring portion 21 (the longitudinal direction of the inner periphery of the ring portion 21). This opening 28 is a part that constitutes the opening 14 formed in the bottom surface part 12 when the blank material 110 is assembled into a box shape. Furthermore, a line of weakness 29 is formed on the first bottom panel 23 . The weakened line 29 is formed at a position that bisects the first bottom panel 23 into one side, the first side panel 22a side, and the other side, the first side panel 22b side. The weakening line 29 linearly weakens the strength of the first bottom panel 23 to make it easier to break, and can be formed by, for example, a perforation or a half cut. By breaking the first bottom panel 23 along the line of weakness 29, it becomes possible to bend the first side panels 22a and 22b so as to be inclined with respect to the ring portion 21. Note that instead of providing the weakening line 29 on the first bottom panel 23, the first bottom panel 23 may be cut in advance at a portion corresponding to the weakening line 29 when the blank material 110 is manufactured.

The second side panel 24a is connected to the second side 102a (one long side) at the inner peripheral edge of the ring portion 21, as shown in FIGS. 5 and 6. Similarly, the second side panel 24b is connected to the second side 102b (the other long side) opposite to the second side 102a at the inner peripheral edge of the ring portion 21, as shown in FIG. In the developed view shown in FIG. 4, the second side panels 24a and 24b are connected to the outer peripheral edge of the ring portion 21 via strip-shaped connecting portions 26a and 26b having the same width as the long side portion of the ring portion 21. ing. After punching out the sheet material as shown in FIG. Attach with adhesive, etc. As a result, as shown in FIGS. 5 and 6, the ring portion 21 and the connecting portions 26a and 26b are integrated, and the second side panels 24a and 24b are connected to the second sides 102a and 24b on the inner peripheral edge of the ring portion 21. 102b. The second side panels 24a and 24b are parts that constitute the side sections 13b and 13d shown in FIG. 1, respectively.

The second bottom panel 25a is connected to the side of the second side panel 24a that is opposite to the side connected to the second side 102a (connection section 26a). Similarly, the second bottom panel 25b is connected to the side of the second side panel 24b that faces the side connected to the second side 102b (connection portion 26b). The second bottom panels 25a and 25b are parts that each constitute a part of the bottom section 12 shown in FIG. 1.

Hereinafter, a method for manufacturing the packaging container 100 shown in FIG. 1 will be described with reference to FIGS. 5 to 7E. 7A to 7E correspond to cross-sectional views taken along the line VI-VI shown in FIG.

In the following description, for convenience of explanation, the boundaries of the above-mentioned parts provided on the blank material 110 will be identified by symbols. Specifically, as shown in FIGS. 5 and 6, the boundary line between the second side panel 24a and the second bottom panel 25a is the boundary line 33a, and the boundary between the second side panel 24b and the second bottom panel 25b. The line is referred to as a boundary line 33b, the boundary line between the first side panel 22a and the first bottom panel 23 as a boundary line 35a, and the boundary line between the first side panel 22b and the first bottom panel 23 as a boundary line 35b. do.

First, as shown in FIG. 7A, a blank material 110 is set in a mold 40. The mold 40 includes a first divided body 41 having a recess 43 complementary to a part of the external shape of the main body 10 and a protrusion 44 protruding from the inner surface of the recess 43, and a ring portion 21 of the blank material 110. (the flange portion 11). The second divided body 42 can be fitted into the first divided body 41, and forms a recess complementary to the entire external shape of the main body 10 in a state where the second divided body 42 is fitted into the first divided body 41. . The second divided body 42 is connected to the first divided body 41 via a spring 45, and has a position where it fits into the first divided body 41 and a position where it is raised from the first divided body 41 as shown in FIG. 7A. It is movable between locations. The blank material 110 is set in the mold 40 so that the ring portion 21 is placed on the second divided body 42 .

The convex portion 44 provided on the first divided body 41 can be inserted into the opening 14 (see FIG. 7C) of the bottom surface portion 12 of the main body portion 10 and has an outer surface shape corresponding to the partition 15. In this embodiment, the cross section of the convex portion 44 along the plane perpendicular to the extending direction is triangular, and the width of the convex portion 44 in the direction perpendicular to the extending direction (the left-right direction in FIG. 7A) is from the bottom surface of the concave portion 43. It gets narrower as you get further away.

Next, as shown in FIG. 7B, while the ring portion 21 of the blank material 110 is clamped, the first bottom panel 23 of the blank material 110 is pressed using a pair of pressing members 46a and 46b. The weakening line 29 provided in the first bottom panel 23 is broken by the pressing by the pressing members 46a and 46b. While expanding the first side panels 22a and 22b and the second side panels 24a and 24b connected to the inner peripheral edge of the ring part 21 using the pressing members 46a and 46b, the second divided body 42 is divided into the first divided parts. It is pushed into the body 41 and fitted. At this time, the first sides 101a and 101b and the second sides 102a and 102b of the inner peripheral edge of the ring part 21 shown in FIG. is folded into a valley fold, so that each part of the blank material 110 is aligned with the recessed part of the mold 40 (see FIG. 7C). In this way, by bending the blank material 110 along the mold 40, the first side panels 22a and 22b and the second side panels 24a and 24b constitute the side sections 13a to 13d, and are divided into two parts. The first bottom panel 23 and the second bottom panels 25a and 25b constitute the bottom section 12, and the ring section 21 and the connecting sections 26a and 26b constitute the flange section 11. Furthermore, by making the distance between the opposing end surfaces of the second bottom panels 25a and 25b equal to the width of the opening 28 provided in the first bottom panel 23, the bottom surface 12 of the main body 10 has the following properties: A slit-shaped opening 14 with a constant width is formed. As shown in FIG. 7C, a convex portion 44 provided on the mold 40 is inserted into this slit-shaped opening 14, so as to protrude inside the main body portion 10. The blank material set in the mold 40 is held in close contact with the inner surface of the mold 40 by, for example, vacuuming.

Note that when bending the blank material 110, molds, jigs, etc. other than those shown in the drawings can be used as appropriate.

Next, the liner material 2 is sealed onto the blank material 110 that is brought into close contact with the mold 40. As shown in FIG. 7D, by placing the heated liner material 2 on a mold 40 and performing pressure forming or vacuum forming, the inner surface of the main body portion 10 and the outer surface of the flange portion 11 are formed as shown in FIG. 7E. Liner material 2 is welded to. At this time, the partition 15 is formed by molding a part of the liner material 2 along the convex portion 44 of the mold 40.

Through the above steps, the packaging container 100 can be manufactured.

FIG. 8 is a cross-sectional view schematically showing another example of the method for manufacturing the packaging container shown in FIG. 1.

In the manufacturing method shown in FIGS. 7A to 7E, the ring-shaped second divided body 42 is configured separately from the first divided body 41, and while the second divided body 42 is lifted by the spring 45, the second divided body 42 is An example has been described in which the blank material 110 placed on the divided body 42 is clamped and the blank material 110 is deformed into a box shape using the pressing members 46a and 46b. However, the manufacturing method shown in FIGS. 7A to 7E is an example, and the shape of the mold and the method of deformation are not limited as long as the blank material 110 shown in FIG. 5 can be deformed along the inner surface of the recess of the mold 40. . For example, if the height of the partition 15 is lower than the top surface of the main body part 10 to some extent, the height of the convex part 44 provided inside the mold 40 is also low, so that the mold 40 cannot be divided. First, the blank material 110 can be set without floating from the mold 40, and the blank material 110 can be deformed by a pressing member or a convex mold.

Since the packaging container 100 according to the present embodiment includes a partition 15 formed by molding a part of the liner material 2, two or more types of contents can be separated and packaged, and the contents can be moved easily. can also be suppressed. Since the partition 15 is formed using the liner material 2 that is the material for forming the packaging container 100, no separate member is required. Furthermore, the partition 15 can be formed by forming the opening 14 in the bottom surface 12 of the blank material 110 and providing the mold 40 used in the step of sealing the liner material 2 with a protrusion 44 that can be inserted into the opening 14. Compared to the case where the partition 15 is not provided, the manufacturing process is not complicated.

Furthermore, by making the width of the partition 15 in the direction orthogonal to the stretching direction narrower as it moves away from the bottom part 12, that is, by making the thickness of the partition 15 thinner toward the upper end, a plurality of packaging containers 100 can be stacked. This makes it possible to improve the transportation efficiency of the packaging container 100 after molding.

FIG. 9 is a developed view of a blank material used for manufacturing a packaging container according to a modification of the first embodiment.

In the examples shown in FIGS. 4 to 6, the blank material 110 is formed from one sheet, but as shown in FIG. 9, the sheet is divided into multiple parts and punched out, and each part is pasted together The blank material may be constructed by the following methods. The parts shown in the exploded view of FIG. 9 are obtained by separating the ring part 21 and the connecting parts 26a and 26b along the respective boundary lines 31a and 31b in the exploded view shown in FIG. By bonding the connecting portions 26a and 26b shown in FIG. 9 to the back surface of the ring portion 21 with an adhesive or the like, a blank material substantially the same as that shown in FIGS. 5 and 6 can be obtained. Even when using a blank made from the parts shown in FIG. 9, a packaging container similar to that shown in FIG. 1 can be manufactured by the manufacturing method described above.

In addition, instead of configuring the blank material into three parts as shown in FIG. 9, for example, the connecting part 26a is connected to the ring part 21 as in the example of FIG. 4, and the connecting part 26b is separated from the ring part 21. The blank material may be composed of two parts.

Further, in the first embodiment, the outer peripheral edge of the flange portion 11 is rectangular, but it may be punched out using a mold or the like before or after bonding the ring portion 21 and the connecting portions 26a and 26b. Accordingly, it is also possible to form the outer peripheral edge of the flange portion 11 into an irregular shape other than a rectangle.

Further, in the first embodiment, the partition 15 is provided to divide the main body 10 into two in the lateral direction, but the dividing position of the main body 10 by the partition 15 is arbitrary. By changing the shape and position of the opening 28 formed in the first bottom panel 23 of the blank material 110, it is possible to change the shape and formation position of the partition 15 in plan view. Further, in addition to providing the opening 28 in the first bottom panel 23, openings or notches may also be provided in the second bottom panels 25a and 25b. By providing openings or cutouts in both the first bottom panel 23 and the second bottom panels 25a and 25b, it is also possible to form a partition that divides the interior of the main body 10 into a cross shape, for example.

Further, in the first embodiment, an opening 28 is provided in advance in the first bottom panel 23 of the blank material 110 so that the opening 14 used for forming the partition 15 is formed in the bottom part 12 of the main body part 10. . However, no openings are provided in advance in the first bottom panel 23 and second bottom panels 25a and 25b of the blank material 110, and after the bottom part 12 without openings is formed, slit-shaped openings are formed by punching or the like. holes) may be formed. When sealing the liner material 2, a partition can be constructed in a similar manner by using a mold having a convex portion corresponding to the punched hole formed. In this way, when punch holes are provided for forming partitions later, partitions of arbitrary shapes can be easily formed.

In the first embodiment, before sealing the liner material 2, a member such as the same sheet material as the main body part 10 or another paper is superimposed on the convex part 44 of the mold 40, and the member is covered. By sealing the liner material 2 in this manner, a partition with higher rigidity can be constructed.

Further, in the first embodiment, the height of the partition 15 may be approximately the same as the height of the flange portion 11, and the upper end portion of the partition 15 may be formed as a flat surface flush with the flange portion 11. . With this configuration, after the main body 10 is filled with contents, the lid material can be sealed to the outer surface of the flange 11 and the upper end surface of the partition 15, so that, for example, one of the compartments of the main body 10 It becomes possible to store rice in one compartment and curry roux in the other compartment of the main body 10, and the packaging container has a variety of uses.

(Second embodiment)
FIG. 10 is a perspective view of the packaging container according to the second embodiment, FIG. 11 is a sectional view taken along the line XI-XI shown in FIG. 10, and FIG. 12 is a cross-sectional view taken along the line XII-XI shown in FIG. FIG. 3 is a cross-sectional view taken along line XII.

The packaging container 100 includes a sheet material 1 and a liner material 2.

The sheet material 1 is a sheet that serves as a base material for the packaging container 200, and includes a box-shaped main body portion 10 with one side open, and a flange portion 11 extending outward from the periphery of the open surface (opening) of the main body portion 10. and a partition 18 provided inside the main body portion 10. The outer surface (the upper surface in FIGS. 10 to 12) of the flange portion 11 is a flat surface. In this embodiment, the main body portion 10 has a rectangular shape in plan view, and includes bottom portions 16a and 16b and six side portions 17a to 17f. The material described in the first embodiment can be used for the sheet material 1.

The partition 18 divides the inside of the main body portion 10 into an accommodation space on the side surface portion 17a side and an accommodation space on the side surface portion 17d side. As shown in FIGS. 11 and 12, the partition 18 is hollow, and the width (thickness) in the direction perpendicular to the extending direction of the partition 15 (the left-right direction in FIGS. 11 and 12) is separated from the bottom parts 16a and 16b. It is getting narrower. The partition 18 is formed by combining parts of the sheet material 1 into a ridge shape and sealing the liner material 2, and the method for forming the partition will be described later.

The liner material 2 is made of a resin film and is sealed to the inner surface of the main body portion 10 (box-shaped inner surface), the outer surface of the flange portion 11, and the outer surface of the partition 18. The liner material 2 has the role of integrating each surface constituting the main body portion 10, the flange portion 11, and the partition 18, and imparting strength to the entire packaging container 100. As the material of the liner material 2 and the sealing method, those explained in the first embodiment can be adopted.

FIG. 13 is a developed view of the blank material used for manufacturing the packaging container shown in FIG. 10, FIG. 14 is a plan view of the blank material used for manufacturing the packaging container shown in FIG. 10, and FIG. 15 is a plan view showing a cross-sectional view taken along the line XV-XV shown in FIG. 14. FIG.

The blank material 210 shown in FIG. 14 is obtained by punching out a member having the shape shown in FIG. 13 from a single sheet material, partially bending the punched member, and pasting the parts that overlap with the ring part 51 with adhesive or the like. be.

The blank material 210 includes a ring portion 51, a pair of first side panels 52a and 52b, a first bottom panel 53, a pair of second side panels 54a and 54b, and a second bottom panel 55. It includes a pair of third side panels 56a and 56b, a pair of third bottom panels 57a and 57b, and a pair of partition panels 58a and 58b. Each of the above-mentioned parts is integrally constructed of the same sheet material. Note that openings 60a, 60b, and 61 are formed in the inner region of the ring portion 51 by punching out a sheet material (see FIG. 13).

The ring portion 51 has a rectangular ring shape. The ring portion 51 is a portion that constitutes the outer surface of the flange portion 11 shown in FIG. The inner peripheral edge of the ring portion 51 is rectangular and has a pair of first sides 201a and 201b facing each other and a pair of second sides 202a and 202b adjacent to these and facing each other.

The first side panel 52a is connected to a part of the first side 201a (one long side) at the inner peripheral edge of the ring portion 51. The first side panel 52b is located at the boundary between the first side panel 52a and the ring portion 51 among the first side 201b (the other long side) that faces the first side 201a at the inner peripheral edge of the ring portion 21. It is connected to the portion facing the line 75a. The first side panels 52a and 52b are parts that constitute side sections 17b and 17f shown in FIG. 10, respectively.

The first bottom panel 53 is connected to each of the first side panels 52a and 52b. The first bottom panel 53 is a part that constitutes a part of the bottom part 16a shown in FIG. 10. A line of weakness 62 is formed on the first bottom panel 53 . The weakened line 62 is formed at a position that bisects the first bottom panel 53 into one side, the first side panel 52a side, and the other side, the first side panel 52b side. The weakening line 62 linearly weakens the strength of the first bottom panel 53 to make it easier to break, and can be formed by, for example, a perforation or a half cut. By breaking the first bottom panel 53 along the line of weakness 62, it becomes possible to bend the first side panels 52a and 52b so as to be inclined with respect to the ring portion 51. Note that instead of providing the weakening line 62 on the first bottom panel 53, the first bottom panel 53 may be cut in advance at a portion corresponding to the weakening line 62 when the blank material 210 is manufactured.

The second side panel 54a is attached to the other part of the first side 201a (one long side) of the inner peripheral edge of the ring part 51, that is, the part of the first side 201a excluding the boundary line 75a. It is connected. The second side panel 54b is connected to a portion of the first side 201b (the other long side) of the inner peripheral edge of the ring portion 51 that faces the boundary line 77a between the second side panel 54a and the ring portion 51. has been done. The second side panels 54a and 54b are parts that constitute side sections 17c and 17e shown in FIG. 10, respectively.

The second bottom panel 55 is connected to each of the second side panels 54a and 54b. The second bottom panel 55 is a part that constitutes a part of the bottom part 16b shown in FIG. A line of weakness 63 is formed on the second bottom panel 55 . The weakening line 63 is formed at a position that divides the second bottom panel 55 into two parts, one on the second side panel 54a side and the other on the second side panel 54b side. The weakening line 63 linearly weakens the strength of the second bottom panel 55 to make it easier to break, and can be formed by, for example, a perforation or a half cut. By breaking the second bottom panel 55 along the line of weakness 63, it becomes possible to bend the second side panels 54a and 54b so as to be inclined with respect to the ring portion 51. Note that instead of providing the weakening line 63 on the second bottom panel 55, the second bottom panel 55 may be cut in advance at a portion corresponding to the weakening line 63 when the blank material 210 is manufactured.

The third side panel 56a is connected to the second side 102a (one long side) at the inner peripheral edge of the ring portion 51, as shown in FIGS. 14 and 15. Similarly, the third side panel 56b is connected to the second side 202b (the other long side) opposite to the second side 202a at the inner peripheral edge of the ring portion 51, as shown in FIG. In the developed view shown in FIG. 13, the third side panels 56a and 56b are connected to the outer peripheral edge of the ring portion 51 via strip-shaped connecting portions 59a and 59b having approximately the same width as the long side portion of the ring portion 51. has been done. After punching out the sheet material as shown in FIG. 13, the boundary lines 71a and 71b between the ring part 51 and the third side panels 56a and 56b are mountain-folded, and the connecting parts 59a and 59b are formed on the back side of the ring part 51. Attach with adhesive, etc. As a result, as shown in FIGS. 15 and 16, the ring portion 21 and the connecting portions 59a and 59b are integrated, and the third side panels 56a and 56b are connected to the second side 202a and the inner peripheral edge of the ring portion 51. 202b. The third side panels 56a and 56b are parts that constitute the side sections 17a and 17d shown in FIG. 10, respectively.

The third bottom panel 57a is connected to the side of the third side panel 56a that is opposite to the side connected to the second side 202a (connection portion 59a). Similarly, the third bottom panel 57b is connected to the side of the third side panel 56b that faces the side connected to the second side 202b (connection portion 59b). The third bottom panels 57a and 57b are parts that constitute part of the bottom sections 16a and 16b shown in FIG. 10, respectively.

The partition panel 58a is connected to the side of the third bottom panel 57a that is opposite to the side connected to the third side panel 56a. Similarly, the partition panel 58b is connected to the side of the third bottom panel 57b that is opposite to the side connected to the third side panel 56b. The partition panels 58a and 58b are parts of the partition 18 shown in FIG.

Hereinafter, a method for manufacturing the packaging container 200 shown in FIG. 10 will be described with reference to FIGS. 14 to 16E. 16A to 16E correspond to cross-sectional views taken along the line XV-XV shown in FIG. 14.

In the following description, the boundaries of the above-mentioned parts provided on the blank material 210 will be identified by symbols. Specifically, as shown in FIGS. 14 and 15, the boundary line between the third side panel 56a and the third bottom panel 57a is the boundary line 73a, and the boundary line between the third bottom panel 57a and the partition panel 58a is the boundary line 73a. A line 74a, a boundary line between the third side panel 56b and the third bottom panel 57b, a boundary line 73b, a boundary line between the third bottom panel 57b and the partition panel 58b, a boundary line 74b, a boundary line between the ring portion 51 and the first side surface The boundary line of the panel 52a is the boundary line 75a, the boundary line of the first side panel 52a and the first bottom panel 53 is the boundary line 76a, the boundary line of the ring part 51 and the first side panel 52b is the boundary line 75b, The boundary line between the first side panel 52b and the first bottom panel 53 is the boundary line 76b, the boundary line between the ring portion 51 and the second side panel 54a is the boundary line 77a, and the boundary line between the second side panel 54a and the second bottom surface is the boundary line 76b. The boundary line with the panel 55 is the boundary line 78a, the boundary line between the ring part 51 and the second side panel 54b is the boundary line 77b, and the boundary line between the second side panel 54b and the second bottom panel 55 is the boundary line. 78b.

First, as shown in FIG. 16A, a blank material 210 is set in a mold 80. The mold 80 includes a first divided body 81 having a recess 83 complementary to a part of the external shape of the main body 10 and a protrusion 84 protruding from the inner surface of the recess 83, and a ring portion 51 of the blank material 210. (the flange portion 11). The second divided body 82 can be fitted into the first divided body 81 , and forms a recess complementary to the entire external shape of the main body 10 in a state where the second divided body 82 is fitted into the first divided body 81 . . The second divided body 82 is connected to the first divided body 81 via a spring 85, and has a position where it fits into the first divided body 81 and a position where it is raised from the first divided body 81 as shown in FIG. 16A. It is movable between locations. The blank material 210 is set in the mold 80 so that the ring portion 51 is placed on the second divided body 42 .

The convex portion 84 provided on the first divided body 81 is located between the first side panels 52a and 52b and the second side panels 54a and 54b, and between the first bottom panel 53 and the second bottom surface. It has a shape that can be inserted between it and the panel 55. The outer surface shape of the convex portion 84 becomes the shape of the partition 18. In this embodiment, the cross section of the convex portion 84 along the plane perpendicular to the extending direction is triangular, and the width of the convex portion 84 in the direction perpendicular to the extending direction becomes narrower as the distance from the bottom surface of the recessed portion 83 increases.

Next, as shown in FIG. 16B, with the ring portion 51 of the blank material 210 clamped, the first bottom panel 53 and the second bottom panel of the blank material 210 are pressed using a pair of pressing members 86a and 86b. Press 55. The pressure by the pressing members 86a and 86b breaks the weakened line 62 provided on the first bottom panel 53 and the weakened line 63 provided on the second bottom panel 55. While spreading the first side panels 52a and 52b, the second side panels 54a and 54b, and the third side panels 56a and 56b connected to the inner peripheral edge of the ring part 51 using the pressing members 86a and 86b. , the second divided body 82 is pushed into the first divided body 81 and fitted. At this time, the first sides 201a and 202b (border lines 75a and 77a, border lines 75b and 77b) and the second sides 202a and 202b shown in FIG. , the boundary lines 78a and 78b, the boundary lines 73a and 73b, and the boundary lines 74a and 74b are folded into valley folds, so that each part of the blank material 210 is aligned with the recessed part of the mold 80 (see FIG. 16C). . In this way, by bending the blank material 210 along the mold 80, the first side panels 52a and 52b, the second side panels 54a and 54b, and the third side panels 56a and 56b are formed on the sides. A first bottom panel 53 divided into two parts, a second bottom panel 55 divided into two parts, and third bottom panels 57a and 57b constitute bottom parts 16a and 16b, and a ring The portion 51 and the connecting portions 59a and 59b constitute the flange portion 11. Further, the pair of bent partition panels 58a and 58b are inserted between the second side panels 54a and 54b and between the first bottom panel 53 and the second bottom panel 55, which are divided into two. , along the convex portion 84 of the mold 80. The blank material 210 set in the mold 80 is held in close contact with the inner surface of the mold 80 by, for example, vacuuming.

Note that when bending the blank material 210, a mold, a jig, etc. can be used as appropriate.

Next, the liner material 2 is sealed onto the blank material 210 that is brought into close contact with the mold 80. As shown in FIG. 16D, by placing the heated liner material 2 on a mold 80 and performing pressure forming or vacuum forming, the inner surface of the main body portion 10 and the outer surface of the flange portion 11 are formed as shown in FIG. 16E. and the outer surface of the partition 18. The liner material 2 is welded to the outer surface of the partition 18. By sealing the liner material 2 with the partition panels 58a and 58b along the outer surface of the convex portion 84 of the mold 80, the ridge-shaped partition 18 can be formed.

Through the above steps, the packaging container 200 can be manufactured.

Since the packaging container 200 according to the present embodiment includes a partition 18 formed by a part of the sheet material 1 and a part of the liner material 2 covering it, it is possible to separate and package two or more types of contents. It is also possible to suppress the movement of stored items. Since the partition 18 is formed using the sheet material 1 and the liner material 2, which are the forming materials of the packaging container 100, no separate member is required. Furthermore, the partitions 18 can be formed by providing the partition panels 58a and 58b on the blank material 110 and providing the convex portions 84 on the mold 80 used in the process of sealing the liner material 2, so compared to the case where the partitions 15 are not provided, the partitions 18 can be formed. , the manufacturing process does not become complicated.

Furthermore, by forming the width of the partition 18 in the direction orthogonal to the stretching direction to become narrower as the distance from the bottom portions 16a and 16b increases (that is, by reducing the thickness of the partition 18 toward the upper end), a plurality of It becomes possible to stack the packaging containers 200, and the transportation efficiency of the packaging containers 200 after molding can be improved.

Note that in the examples shown in FIGS. 13 to 15, the blank material 210 is formed as one sheet, but similarly to the first embodiment, the blank material 210 is divided as appropriate to form a plurality of parts. It may also be configured by

FIG. 17 is a perspective view showing a packaging container according to a modification of the second embodiment, and FIG. 18 is a developed view of a blank material used for manufacturing the packaging container shown in FIG. 17.

The packaging container 201 shown in FIG. 17 may be configured to further include a flange portion 49 at the top of the partition 18. For example, as shown in FIG. 18, the packaging container 201 shown in FIG. It can be constructed using a blank material 211 provided with a band-shaped portion 88 to separate the two. Furthermore, in the packaging container 201 shown in FIG. 17, a weakening line such as a perforation may be provided at the position shown by the two-dot chain line in FIGS. 17 and 18. When configured in this way, it becomes possible to use it by cutting it out along the line of weakness, or to use it by folding it along the line of weakness. Note that the sheet material punched into the shape shown in FIG. 18 is bent in advance in the same manner as described in FIGS. 14 to 16, and the connecting portions 59a and 59b are adhered to the back surface of the ring portion 51 with adhesive or the like.

In the second embodiment, the outer peripheral edge of the flange portion 11 is rectangular, but it may be punched using a mold or the like before or after bonding the ring portion 51 and the connecting portions 59a and 59b. Accordingly, it is also possible to form the outer peripheral edge of the flange portion 11 into an irregular shape other than a rectangle.

Further, in the second embodiment, the height of the partition 18 may be made substantially the same as the height of the flange portion 11, and the upper end portion of the partition 18 may be formed as a flat surface flush with the flange portion 11. With this configuration, after the main body 10 is filled with contents, the lid material can be sealed to the outer surface of the flange 11 and the upper end surface of the partition 15, so that, for example, one of the compartments of the main body 10 It becomes possible to store rice in one compartment and curry roux in the other compartment of the main body 10, and the packaging container has a variety of uses.

(Other variations)
FIG. 19 is a sectional view showing a packaging container according to another modification of the first embodiment, and is a sectional view corresponding to FIG. 2.

The packaging container 101' shown in FIG. 19(a) differs from the packaging container 100 shown in FIGS. 1 to 3 in that a flat surface is provided at the upper end of the partition 15. The partition 15 having a flat surface at the upper end is used as a mold to be used when sealing the liner material 2. A convex portion (see the convex portion 44 in FIGS. 7D and 7E) for forming the partition 15 has a flat surface at the upper end. It can be formed by using what is provided. In this way, when the partition 15 is provided with a flat surface, by supporting the inside of the partition 15 with a receiving jig, the lid material 19 is sealed to the flat surface of the partition 15, as shown in FIG. 19(b). Therefore, movement of the contents between the partition 15 and the liner material 2 can be suppressed. Therefore, the packaging container 100' shown in FIG. 19 can be used to store contents such as foods with a high moisture content in one or both compartments of the main body 10.

The present invention can be applied to packaging containers for packaging foods and other articles.

1 Sheet material 2 Liner material 10 Main body portion 11 Flange portion 12 Bottom portions 13a to 13d Side portion 14 Opening 15 Partitions 16a, 16b Bottom portions 17a to 17f Side portion 18 Partition 21 Ring portions 22a, 22b First side panel 23 First Bottom panel 24a, 24b Second side panel 25a, 25b Second bottom panel 28 Opening 40 Mold 41 First divided body 42 Second divided body 44 Convex portion 51 Ring portion 52a, 52b First side surface Panel 53 First bottom panel 54a, 54b Second side panel 55 Second bottom panel 56a, 56b Third side panel 57a, 57b Third bottom panel 58a, 58b Partition panel 80 Mold 81 First division Body 82 Second divided body 84 Convex portions 100, 200, 201 Packaging containers 110, 210, Blank material

Claims (8)

A packaging container,
A sheet material constituting a box-shaped main body portion with one side open and having a bottom surface portion and a side surface portion, and a flat flange portion extending outward from a periphery of the open surface of the main body portion;
a liner material sealed to an inner surface of the main body portion and an outer surface of the flange portion;
A slit-shaped opening is provided in the bottom part of the main body part,
A packaging container, wherein a hollow partition formed by a part of the liner material is provided in a portion of the main body that overlaps with the opening. The packaging container according to claim 1, wherein the width of the partition in a direction perpendicular to the stretching direction becomes narrower as the distance from the bottom portion increases. A blank material used for manufacturing the packaging container according to claim 1 or 2,
a ring portion having a rectangular shape corresponding to the flange portion;
a pair of first side panels connected to each of a pair of opposing first sides at an inner peripheral edge of the ring portion and corresponding to a part of the side surface portion;
a first bottom panel connected to each of the pair of first side panels and corresponding to a part of the bottom part;
a pair of second side panels connected to each of a pair of second sides adjacent to the first side at the inner peripheral edge of the ring portion and corresponding to another part of the side surface portion;
a pair of second bottom panels connected to each of the pair of second side panels and corresponding to a part of the bottom section;
A blank material, wherein an opening for forming the opening is formed in the first bottom panel. A method for manufacturing a packaging container using the blank material according to claim 3, comprising:
The bent blank is set in a mold having a recess that is complementary to the outer shape of the main body, and a convex part that protrudes from the inner surface of the recess and can be inserted into the opening of the bottom part, and and the pair of second side panels constitute the side surface part, and the first bottom panel is divided into two on one side and the other side of the pair of first side panels, The pair of second bottom panels constitute the bottom part having the opening, the ring part constitutes the flange part, and the convex part inserted through the opening of the bottom part forms the main body part. a step of protruding inside the
sealing a liner material to the inner surface of the main body portion and the outer surface of the flange portion, and molding a portion of the liner material along the outer surface of the convex portion of the mold to form the partition; A method for manufacturing a packaging container, comprising: A packaging container,
A box-shaped main body with one side open and having a bottom face and a side face, a flat flange extending outward from a periphery of the open face of the main body, and a partition provided inside the main body. A sheet material constituting the
A packaging container comprising a liner material sealed to an inner surface of the main body, an outer surface of the flange, and an outer surface of the partition. The packaging container according to claim 5, wherein the width of the partition in a direction perpendicular to the stretching direction becomes narrower as the distance from the bottom portion increases. A blank material used for manufacturing the packaging container according to claim 5 or 6,
a ring portion having a rectangular shape corresponding to the flange portion;
Connected to a part of one of the pair of first sides facing each other at the inner peripheral edge of the ring part and a part of the other first side facing the part, respectively. a pair of first side panels corresponding to a portion of the side portion;
a first bottom panel connected to each of the pair of first side panels and corresponding to a part of the bottom part;
Among the inner peripheral edges of the ring part, the ring part is connected to another part of the one first side and another part of the other first side, and is connected to a part of the side part. a corresponding pair of second side panels;
a second bottom panel connected to each of the pair of second side panels and corresponding to a part of the bottom part;
a pair of third side panels connected to each of a pair of second sides adjacent to the first side at an inner peripheral edge of the ring part and corresponding to another part of the side side part;
a pair of third bottom panels connected to each of the pair of third side panels and corresponding to a part of the bottom section;
and a pair of partition panels connected to each of the third bottom panels and corresponding to the partition. A method for manufacturing a packaging container using the blank material according to claim 7,
A metal plate having a recess complementary to the outer shape of the main body, and a protrusion protruding from the inner surface of the recess and insertable between the pair of first side panels and the pair of second side panels. By setting the bent blank material in a mold and bending the blank material, the pair of first side panels, the pair of second side panels, and the pair of third side panels are formed. The first bottom panel, which constitutes the side surface portion, is divided into two parts on one side and the other side of the pair of first side panels, and the second bottom panel is divided into two parts on one side and the other side of the pair of second side panels. The second bottom panel and the pair of third bottom panels make up the bottom part, the ring part makes up the flange part, and the pair of first side panels and the pair of second bottom panels make up the bottom part. The convex portion inserted from between the side panels is made to protrude inside the main body portion, and the pair of partition panels are made to protrude between the pair of first side panels and the pair of second side panels. a step of arranging the convex portion along the convex portion;
A step of sealing a liner material to the inner surface of the main body, the outer surface of the flange, and the outer surface of the partition while each of the pair of partition panels is aligned with the outer surface of the convex portion of the mold. A method for manufacturing a packaging container, comprising:

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