Packaging container, packaging container with contents, and method for manufacturing a packaging container with contents

Abstract

To provide a shaping member for a packaging container capable of effectively withstanding external force and increasing the filling speed even without a holding plate.SOLUTION: A shaped member for packaging containers 10 is a shaping member for a packaging container that a cross section when three-dimensionalized has a rectangular cylindrical body, and is provided with a front side sheet 11 and a back side sheet 12 arranged so as to face each other, a first connecting sheet 13A connecting outer edges on a first side X1 in a first direction X along the front side sheet, of the front side sheet and the back side sheet, a second connecting sheet 13B connecting outer edges on a second side X2 in the first direction, of the front side sheet and the back side sheet, and a third connection sheet 14 connecting outer edges on a first side Y1 in a second direction Y along the front side sheet and intersecting the first direction, of the front side sheet and the back side sheet. The first connecting sheet, the second connecting sheet, and the third connecting sheet are each folded in a facing direction Z in which the front side sheet and the back side sheet face each other.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to packaging container a packaging container containing contents, and a method for manufacturing the packaging container containing contents.

Background Art

[0002] Conventionally, a packaging container in which a cylindrical sleeve is inserted into a bag-shaped member (bag body) is known (see, for example, Patent Document 1). To fill the packaging container with contents, the packaging container is sucked by a suction pad and expanded into a substantially box shape to form a box-shaped package. A holding plate with a tapered tip is fitted into the box-shaped package. The holding plate is expanded in a substantially parallel state. By heat welding, the side flaps of the box-shaped package are adhered to the side surfaces, and the protruding portions of the top flap are adhered to the side surfaces. The box-shaped package is discharged from the holding plate. The contents are filled from the open bottom of the box-shaped package, and the opening is heat-sealed. The bottom flap formed by heat sealing is bent and welded to the bottom, and the box-shaped package (packaging container containing contents) is completed.

[0003] In the packaging container disclosed in Patent Document 1, the sleeve inserted into the bag-shaped member is easily crushed by the force acting from the outside of the packaging container during heat welding or the like. Therefore, as shown in FIG. 10, when welding the flap 161 of the box-shaped package 160 formed by making the packaging container 150 into a substantially box shape to the bottom of the box-shaped package 160 using the adhesion device 169, the sleeve 151 is supported from the inside of the sleeve 151 by the holding plate 170. Then, the flap 161 is welded to the bottom of the box-shaped package 160 by the heater block 106.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, if the retaining plate 170 is fitted to support the welded flap 161, then the process of detaching the retaining plate 170 from the box-shaped packaging 160 is also required, resulting in a slow filling speed, and thus limiting the production quantity of packaged containers with contents per unit time. After detaching the retaining plate 170 from the box-shaped packaging 160, the contents 175 are filled into the box-shaped packaging 160.

[0006] The present invention has been made in view of the above problems, and aims to provide a shaping member for a packaging container that can effectively withstand external forces without a retaining plate, weld the protruding part (bottom flap) at the bottom of the bag-shaped member (bag body) to the bottom, and increase the filling speed, a packaging container equipped with this shaping member for a packaging container, a packaging container with contents, and a method for manufacturing a packaging container with contents. While Patent Document 1 describes filling the contents from the bottom, the present invention describes filling the contents from the top (head), opposite to the bottom. [Means for solving the problem]

[0007] To solve the aforementioned problems, this invention proposes the following means. The present invention provides a shaping member for a packaging container, which has a rectangular cross-section when formed into a three-dimensional shape. The shaping member comprises a front sheet and a back sheet arranged opposite to each other, a first connecting sheet connecting the first outer edges of the front sheet and the back sheet in a first direction along the front sheet, a second connecting sheet connecting the second outer edges of the front sheet and the back sheet in the first direction, and a third connecting sheet connecting the first outer edges of the front sheet and the back sheet in a second direction that runs along the front sheet and intersects the first direction. The first connecting sheet, the second connecting sheet, and the third connecting sheet are folded in opposing directions relative to the front sheet and the back sheet.

[0008] According to this invention, for example, a shaping member for a packaging container is housed inside the bag body through an opening in the bag body. The first connecting sheet, the second connecting sheet, and the third connecting sheet, which were folded in opposing directions, are then deformed so that they extend in opposing directions. This creates a space between the front sheet and the back sheet. The front sheet, the back sheet, and the first and second connecting sheets are formed as a whole into a cylindrical shape, but the outer edges of the first side in the second direction of the front sheet and the back sheet are connected by the third connecting sheet which extends in the opposing direction. As a result, the third connecting sheet is braced in the opposing direction against forces acting from the outside of the bag body. This makes it easier to fill the shaping member for a packaging container with contents. Therefore, it effectively withstands external forces in the opposing direction, eliminating the need for retaining plates like those in conventional technology, and allowing for faster filling speeds.

[0009] Furthermore, in the shaping member for the packaging container, the first connecting sheet may be folded so as to be convex toward the first side in the first direction, the second connecting sheet may be folded so as to be convex toward the second side in the first direction, and the third connecting sheet may be folded so as to be convex toward the first side in the second direction. According to this invention, the folded first connecting sheet, second connecting sheet, and third connecting sheet do not overlap in the opposing direction with respect to the front sheet and back sheet. Therefore, the length of the packaging container shaping member in the opposing direction can be reduced.

[0010] Furthermore, in the shaping member for the packaging container, the third connecting sheet may have a first connecting piece connected to the outer edge of the front sheet on the first side in the second direction via a first hinge, and a second connecting piece connected to the outer edge of the first connecting piece via a second hinge, and also connected to the outer edge of the back sheet on the first side in the second direction via a third hinge. According to this invention, when the folded third connecting sheet is extended in the opposing direction, the first and second connecting pieces rotate around the first, second, and third hinges, respectively, and the first and second connecting pieces are positioned along the opposing direction. Therefore, the first and second connecting pieces, positioned along the opposing direction, brace against forces acting from the outside of the bag body in the opposing direction. Thus, it can withstand external forces in the opposing direction more effectively.

[0011] Furthermore, the packaging container of the present invention comprises a shaping member for a packaging container as described above, and a bag body having an opening facing a predetermined side and containing the shaping member for a packaging container, wherein the shaping member for a packaging container is positioned such that the predetermined side is the same side as the second side in the second direction.

[0012] According to this invention, for example, contents can be filled from a predetermined side of the packaging container through the opening of the bag body, between the front sheet and the back sheet.

[0013] Furthermore, the contents-containing packaging container of the present invention comprises a packaging container and contents disposed within the packaging container shaping member for the packaging container, wherein the first connecting sheet, the second connecting sheet, and the third connecting sheet are arranged so as to extend in the opposing directions, and the opening of the bag body is closed.

[0014] According to this invention, by arranging the first, second, and third connecting sheets to extend in opposing directions, external forces can be effectively withstood, and the filling speed can be increased. Contents can be placed within the packaging container shaping member, which has a space secured between the front sheet and the back sheet. Then, by closing the opening of the bag body, the contents can be preserved by the bag body.

[0015] Moreover, the method for manufacturing a packaging container containing the content of the present invention is a method for manufacturing a packaging container containing the content by filling the content into the above-described packaging container. The method includes opening the peripheral edge of the opening of the bag body, deforming the first connecting sheet, the second connecting sheet, and the third connecting sheet so as to extend in the facing direction within the bag body, filling the content between the front sheet and the back sheet of the shaping member for the packaging container through the opening of the bag body, and closing the opening of the bag body.

[0016] According to this invention, since the first connecting sheet, the second connecting sheet, and the third connecting sheet are respectively deformed so as to extend in the facing direction, they can effectively withstand an external force, so a holding plate like the prior art is not required, and the filling speed can be increased. The content can be arranged in the shaping member for the packaging container in which a space between the front sheet and the back sheet is secured. And by closing the opening of the bag body, it can be a method for manufacturing a packaging container containing the content that can store the content by the bag body.

Effects of the Invention

[0017] According to the shaping member for the packaging container, the packaging container, the packaging container containing the content, and the method for manufacturing the packaging container containing the content of the present invention, they can effectively withstand an external force, so a holding plate like the prior art is not required, and the filling speed can be increased.

Brief Description of the Drawings

[0018] [Figure 1] It is a front view when the packaging container of one embodiment of the present invention is in a flat bag state. [Figure 2] It is a developed view of the shaping member for the packaging container in the same packaging container. [Figure 3] It is a perspective view of a packaging container containing the content of one embodiment of the present invention. [Figure 4] It is a perspective view for explaining an opening step in the method for manufacturing a packaging container containing the content of one embodiment of the present invention. [Figure 5] It is a view taken in the direction of arrow A1 in FIG. 4. [Figure 6] In the method for manufacturing a packaging container containing the same contents, it is a perspective view for explaining the stretching process. [Figure 7] In the method for manufacturing a packaging container containing the same contents, it is a perspective view for explaining the first bending process. [Figure 8] In the method for manufacturing a packaging container containing the same contents, it is a perspective view for explaining the second bending process. [Figure 9] It is a front view of the shaping member for a packaging container in a modified example of an embodiment of the present invention. [Figure 10] It is a perspective view for explaining a conventional method for manufacturing a packaging container containing contents.

Embodiments for Carrying Out the Invention

[0019] Hereinafter, an embodiment of a shaping member for a packaging container, a packaging container, a packaging container containing contents, and a method for manufacturing a packaging container containing contents according to the present invention will be described with reference to FIGS. 1 to 9. The packaging container 1 shown in FIG. 1 is in a flat flat bag state C1. It includes a shaping member 10 for a packaging container and a bag body 40. Each state of the shaping member 10 for a packaging container and the bag body 40 shown in FIG. 1 is also referred to as a flat bag state C1 hereinafter. First, the material for forming the shaping member 10 for a packaging container will be described.

[0020] For example, the shaping member 10 for a packaging container is formed of synthetic paper having coating layers on both sides of a base paper. As the base paper, various types of paperboards such as unbleached kraft paper, bleached kraft paper, and white cardboard can be used. The coating layer is formed of a thermoplastic resin having heat-sealing properties such as a polyethylene resin. By covering the base paper with the coating layer, in the method for manufacturing a packaging container containing contents described later, the shaping member 10 for a packaging container can be manufactured from the shaping member 10 for a packaging container in a developed shape by heat-sealing, or the shaping member 10 for a packaging container can be welded to the bag body 40 by heat-sealing. Therefore, the manufacturing of a packaging container containing contents becomes simple. The thickness of the synthetic paper should be greater than or equal to the thickness required to allow the contents-filled packaging containers 1 (in the flat bag state C1) to be stacked. The basis weight of the synthetic paper should be 209 g / m². 2 It is sufficient if the basis weight is (grams per square meter) or more. This is because it will be possible to stack about six layers of packaging containers with contents. The basis weight of the synthetic paper is preferably 310 g / m². 2 More preferably 450 g / m² 2 That's all. The basis weight of the synthetic paper is 600 g / m². 2 Beyond a certain thickness, the rebound caused by the increased thickness of the synthetic paper makes it difficult to maintain the three-dimensional shape of the packaging container containing the contents, unnecessarily increasing the amount of synthetic paper used. This is undesirable given the current trend towards resource conservation. Forming the shaping member 10 for the packaging container from paper such as synthetic paper results in superior dead-hold properties for the shaping member 10, making it easier for the shaping member 10 to maintain its shape.

[0021] The shaping member for the packaging container may be formed from a plastic sheet. In this case, for example, the shaping member for the packaging container may be formed from a polyethylene sheet with a thickness of 100 μm (micrometers). This is because, as will be described later, the bag body 40 is formed from a film material mainly composed of plastic, so there is no need to separate the paper and plastic when disposing of the packaging container. When forming the shaping member for the packaging container from a plastic sheet, the sheet thickness should be 50 μm or more. This is because it allows for stacking approximately six layers of packaging containers containing contents. Preferably, the sheet thickness is 100 μm or more, and more preferably 250 μm or more. Furthermore, if the sheet thickness exceeds 1.5 mm, the resulting rebound makes it difficult to maintain the three-dimensional shape of the packaging container containing the contents, unnecessarily increasing the amount of sheet material used. This is undesirable given the current trend towards resource conservation.

[0022] Next, the specific configuration of the shaping member 10 for the packaging container will be described. As shown in Figure 1, the shaping member 10 for the packaging container has a front sheet 11, a back sheet 12, a first connecting sheet 13A, a second connecting sheet 13B, and a third connecting sheet 14. The front sheet 11 and the back sheet 12 have the same rectangular shape when viewed in their respective thickness directions. The front sheet 11 and the back sheet 12 are arranged to face each other. Here, "facing each other" includes not only facing each other but also being in contact with each other. In the following, when viewing the front sheet 11 in the thickness direction, the direction along the first outer edge of the front sheet 11 is referred to as the first direction X. When viewing the front sheet 11 in the thickness direction, the direction along the second outer edge perpendicular to the first outer edge of the front sheet 11 is referred to as the second direction Y. The first direction X and the second direction Y are directions along the front sheet 11. The second direction Y is perpendicular (intersecting) to the first direction X. The direction in which the front sheet 11 and the back sheet 12 face each other is referred to as the opposing direction Z.

[0023] In this embodiment, the configuration of the first connecting sheet 13A and the configuration of the second connecting sheet 13B are identical. Therefore, the configuration of the first connecting sheet 13A is indicated by adding the uppercase letter "A" to the digit of the code. The configuration of the second connecting sheet 13B that corresponds to the first connecting sheet 13A is indicated by adding the uppercase letter "B" to the same digit as the code of the second connecting sheet 13B. This omits redundant explanations. For example, the first side edge connecting piece 18A of the first connecting sheet 13A, described later, and the first side edge connecting piece 18B of the second connecting sheet 13B have the same configuration.

[0024] The first connecting sheet 13A connects the outer edges of the first side X1 (hereinafter simply referred to as the first side X1) in the first direction X of the front sheet 11 and the back sheet 12, respectively. The first connecting sheet 13A has a first side edge connecting piece 18A, a second side edge connecting piece 19A, a first side edge hinge 20A, a second side edge hinge 21A, and a third side edge hinge 22A. The side edge connecting pieces 18A and 19A have the same rectangular shape when viewed in the thickness direction. For example, the side edge hinges 20A, 21A, and 22A are formed by making the synthetic paper easier to bend, such as by compressing the synthetic paper in the thickness direction or by forming perforations (continuous small holes) in the synthetic paper.

[0025] The first side edge hinge 20A is provided on the outer edge of the first side X1 of the front sheet 11, extending in the second direction Y. The first side edge hinge 20A is formed along the entire length of the front sheet 11 in the second direction Y. The first side edge connecting piece 18A is connected to the outer edge of the first side X1 on the front sheet 11 via the first side edge hinge 20A. The first side edge connecting piece 18A can rotate around the first side edge hinge 20A relative to the front sheet 11. The second side edge hinge 21A is provided on the outer edge of the first side X1 of the first side edge connecting piece 18A, extending in the second direction Y. The second side edge hinge 21A is formed along the entire length of the first side edge connecting piece 18A in the second direction Y. The third side edge hinge 22A is provided on the outer edge of the first side X1 of the back sheet 12, extending in the second direction Y. The third side edge hinge 22A is formed along the entire length of the back sheet 12 in the second direction Y.

[0026] The second side edge connecting piece 19A is connected to the outer edge of the first side X1 of the first side edge connecting piece 18A via the second side edge hinge 21A. The second side edge connecting piece 19A is connected to the outer edge of the first side X1 of the back sheet 12 via the third side edge hinge 22A. The second side edge connecting piece 19A can rotate around the second side edge hinge 21A relative to the first side edge connecting piece 18A, and can rotate around the third side edge hinge 22A relative to the back sheet 12. As described above, the first connecting sheet 13A is folded so that it becomes convex toward the first side X1 and the length in the opposing direction Z is shortened.

[0027] The second connecting sheet 13B connects the outer edges of the front sheet 11 and the back sheet 12, respectively, to the second side X2 (hereinafter simply referred to as the second side X2) that is opposite to the first side X1 in the first direction X. The second connecting sheet 13B has a first side edge connecting piece 18B, a second side edge connecting piece 19B, a first side edge hinge 20A, a second side edge hinge 21A, and a third side edge hinge 22B, which have the same configuration as the first side edge connecting piece 18A, a second side edge connecting piece 19A, a first side edge hinge 20A, a second side edge hinge 21A, and a third side edge hinge 22A of the first connecting sheet 13A. The second connecting sheet 13B is folded so that it is convex toward the second side X2, and the length in the opposing direction Z is shortened.

[0028] The third connecting sheet 14 connects the outer edges of the first side Y1 (hereinafter simply referred to as the first side Y1) in the second direction Y of the front sheet 11 and the back sheet 12, respectively. The third connecting sheet 14 has a first bottom edge connecting piece (first connecting piece) 25, a second bottom edge connecting piece (second connecting piece) 26, a first bottom edge hinge (first hinge) 27, a second bottom edge hinge (second hinge) 28, and a third bottom edge hinge (third hinge) 29.

[0029] The bottom edge connecting pieces 25 and 26 have the same rectangular shape when viewed in their respective thickness directions. The first bottom edge hinge 27 is provided on the outer edge of the first side Y1 of the front sheet 11, extending in the first direction X. The first bottom edge hinge 27 is formed along the entire length of the front sheet 11 in the first direction X. The first bottom edge connecting piece 25 is connected to the outer edge of the first side Y1 on the front sheet 11 via the first bottom edge hinge 27. The first bottom edge connecting piece 25 can rotate around the first bottom edge hinge 27 relative to the front sheet 11. The second bottom edge hinge 28 is provided on the outer edge of the first side Y1 of the first bottom edge connecting piece 25, extending in the first direction X. The second bottom edge hinge 28 is formed along the entire length of the first bottom edge connecting piece 25 in the first direction X. The third bottom edge hinge 29 is provided on the outer edge of the first side Y1 of the back sheet 12, extending in the first direction X. The third bottom edge hinge 29 is formed along the entire length of the back sheet 12 in the first direction X.

[0030] The second bottom edge connecting piece 26 is connected to the outer edge of the first side Y1 of the first bottom edge connecting piece 25 via the second bottom edge hinge 28. The second bottom edge connecting piece 26 is connected to the outer edge of the first side Y1 of the back sheet 12 via the third bottom edge hinge 29. The second bottom edge connecting piece 26 can rotate around the second bottom edge hinge 28 relative to the first bottom edge connecting piece 25, and can rotate around the third bottom edge hinge 29 relative to the back sheet 12. The third connecting sheet 14 is folded so that it is convex toward the first side Y1, and the length in the opposite direction Z is shortened. As described above, in the shaping member 10 for the packaging container in the flat bag state C1, the connecting sheets 13A, 13B, and 14 are each folded in half. The connecting sheets 13A, 13B, and 14 are so-called outer gussets. The third connecting sheet 14 is spaced apart from the connecting sheets 13A and 13B. Furthermore, the folding method of the connecting sheets is not limited to a two-fold design; it may also be a four-fold, six-fold, or other similar design.

[0031] The unfolded shaping member 10a, formed by unfolding the shaping member 10 for the packaging container as described above, is configured as shown in Figure 2, for example. The adhesive tab 32 is connected to the outer edge of the back sheet 12 via the third side edge hinge 22B. The adhesive tab 33 is connected to the outer edge of the first bottom edge connecting piece 25 via the second bottom edge hinge 28. The length and width of the adhesive allowances 32 and 33 are set as appropriate. The shaping member unfolded 10a is folded at the side edge hinges 21A, 21B and the second bottom edge hinge 28 so that the display surface shown in Figure 2 is on the inside. For example, by heat sealing the adhesive allowance 32 to the second side edge connecting piece 19B and heat sealing the adhesive allowance 33 to the second bottom edge connecting piece 26, the shaping member 10 for the packaging container in the flat bag state C1 shown in Figure 1 is manufactured.

[0032] The forming member unfolded may be constructed solely from the base paper. In this case, the adhesive area may be bonded with glue or the like. The shape of the unfolded shaping member when the packaging container shaping member 10 is unfolded is not limited to the shape shown in Figure 2. However, the shape shown in Figure 2 allows for the formation of an adhesive surface in the third connecting sheet and provides thickness, so that it can withstand external forces more effectively during filling without the need for a holding plate as in the conventional technology. Furthermore, it can be cut out efficiently from a large sheet in terms of area, which reduces waste loss.

[0033] As shown in Figure 1, the bag body 40 is a so-called three-sided sealed bag, having an opening 47, two sealing sections, and a connecting section 45 formed by folding the film material. The bag body 40 has a pair of flat sections 41A and 41B and a zipper 42. The flat sections 41A and 41B face each other. The flat sections 41A and 41B are formed by folding a single film material in half.

[0034] In this embodiment, the film material is a laminate film consisting of multiple layers. For example, the film material has a layered structure from the outer side of the bag body 40 consisting of heat-seal type (heat-seal coated on the surface) OPP (biaxially oriented polypropylene) 25 μm / PE (polyethylene) film 50 μm. The innermost layer functions as a sealant. The PE is preferably low-density polyethylene (LLDPE). In addition, the innermost layer of the bag body 40 in the film material may be formed of PP (polypropylene) film. Furthermore, to improve the barrier properties of the film material, a layer of aluminum foil may be added to the film material. In this case, for example, the film material will have a layered structure from the outer side of the bag body 40 consisting of heat-sealable OPP 25μm / aluminum foil 7μm / PE film 50μm. Furthermore, as with the film material described above, it is desirable that not only the innermost layer of the bag body 40 in the film material, but also the outer layer, have heat-sealing properties.

[0035] Depending on the performance required for the contents to be filled into the packaging container 1, such as moisture resistance and light shielding, various types of plastic films and metal foils can be used as the film material. The film material is manufactured by laminating multiple material films used in the film material using methods such as dry lamination and extrusion lamination. Furthermore, the film material may be formed as a single layer. This is to accommodate the current trends in recycling and reuse. In this case, it is preferable to form the packaging container shaping member from the same material as the film material.

[0036] The bag body 40 has connecting portions 45 at the folded-over parts of the film material that connect the flat portions 41A and 41B. Heat-sealed portions 46A and 46B are formed on both sides of the bag body 40 by bonding the side edges of the flat portions 41A and 41B together along the side edges. The heat-sealed portions 46A and 46B will become the side flaps, which will be described later. Furthermore, the end of the bag body 40 opposite to the connecting portion 45 is left open. An opening 47 facing a predetermined side D (outside) is formed at this end.

[0037] The zipper 42 is provided on the inner surface of the flat sections 41A and 41B on the side of the opening 47. The zipper 42 allows the opening 47 to be freely opened and closed. The zipper 42 has a linear female member 50 and a male member 51 that engage with each other. The female member 50 is provided on the inner surface of the flat section 41A on the side of the opening 47. The male member 51 is provided on the inner surface of the flat section 41B on the side of the opening 47. The female member 50 and the male member 51 extend along the entire length between the heat seal sections 46A and 46B, respectively. The bag body 40 is equipped with a zipper 42, which is convenient when the packaging container 1 is filled with contents that will not be used all at once, such as multiple tea bags. By closing the zipper 42, the remaining contents that have not been used can be stored in the packaging container 1. Furthermore, in order to easily open the bag body 40 with the opening 47 closed, notches or the like that can be used as a starting point for cutting the flat portions 41A and 41B may be provided on the bag body 40 near the opening 47.

[0038] The packaging container shaping member 10 is housed inside the bag body 40. The packaging container shaping member 10 is positioned such that a predetermined side D is on the same side as the second side Y2 (hereinafter simply referred to as the second side Y2) which is opposite to the first side Y1 in the second direction Y. The folded first connecting sheet 13A abuts against the heat seal portion 46A from the second side X2 to the first side X1 relative to the heat seal portion 46A. The folded second connecting sheet 13B abuts against the heat seal portion 46B from the first side X1 to the second side X2 relative to the heat seal portion 46B. The folded third connecting sheet 14 abuts against the connecting portion 45 from the second side Y2 to the first side Y1 relative to the connecting portion 45. The shaping member 10 for the packaging container may be welded (attached) to the flat portions 41A and 41B of the bag body 40. In this case, the area to which the shaping member 10 for the packaging container is welded to the flat portions 41A and 41B is not limited. For example, the ends of the first side Y1 and the second side Y2 of the front sheet 11 and back sheet 12 are welded to the flat portions 41A and 41B. These welded portions are formed over substantially the entire length in the first direction X of the front sheet 11 and back sheet 12. In this way, the shaping member 10 for the packaging container and the bag body 40 are fixed to the ends over substantially the entire length, and in areas where the shaping member 10 for the packaging container and the bag body 40 overlap, they are not fixed and are, so to speak, floating. As a result, tension is applied to the bag body in these floating portions when it is formed into a three-dimensional shape, improving the aesthetic appearance. By welding the shaping member 10 for the packaging container to the bag body 40, the reproducibility of the shape of the packaging container 1 can be improved.

[0039] The overall thickness of the packaging container 1 in the flat bag state C1 is preferably between approximately 25 μm and 120 μm. A thickness lower than this makes it difficult to protect the contents. A thickness higher than this unnecessarily increases the amount of material used, which is undesirable given the current trend towards resource conservation.

[0040] The packaging container 1, configured as described above, is used by filling it with contents such as food. Figure 3 shows a packaging container 2 with contents (not shown) filled inside the packaging container 1. When used as a packaging container 2 with contents, the packaging container 1 is transformed from a flat bag state C1 to a box-shaped box state C2. The contents-filled packaging container 2 comprises a packaging container 1 in a box state C2 and the contents. The packaging container shaping member 10 inside the contents-filled packaging container 2 is deformed into a box shape, ranging from a cube to a rectangular parallelepiped. Both the packaging container shaping member 10 and the bag body 40 in this state are also referred to as the box state C2. The packaging container shaping member 10 in the box state C2 is a cylindrical body with a rectangular cross-section. In the box-shaped packaging container forming member 10, the first connecting sheet 13A, the second connecting sheet 13B, and the third connecting sheet 14 are arranged so as to extend in the opposing direction Z. The contents are placed inside the box-shaped packaging container forming member 10. The opening 47 of the bag body 40 is closed.

[0041] The type of contents is not particularly limited. Suitable contents are those that would lose their commercial value if crushed. Specifically, tetrahedral tea bags or tea leaves are suitable contents.

[0042] Next, we will describe the manufacturing method (hereinafter simply referred to as the manufacturing method) for the contents-filled packaging container 1 of this embodiment. The following manufacturing method describes the case in which the contents-filled packaging container 2 is manufactured one by one by filling it with contents. First, in the opening process, as shown in Figures 4 and 5, for example, suction cups 100A and 100B are used to open the periphery of the opening 47 of the bag body 40 in the flat bag state C1 in the opposing direction Z. Note that Figure 5 shows the state in which the opening 47 of the bag body 40 is closed. Suction cups 100A and 100B are connected to hoses 101A and 101B, respectively, which are capable of sucking air from inside suction cups 100A and 100B. Suction cup 100A is attached to the portion of the flat section 41A near the opening 47. Suction cup 100B is attached to the portion of the flat section 41B near the opening 47. Air is sucked into suction cups 100A and 100B from hoses 101A and 101B. Suction cups 100A and 100B are moved apart from each other in the opposing direction Z, and the periphery of the opening 47 of the bag body 40 is opened in the opposing direction Z. Once the opening process is complete, the next process begins.

[0043] Next, in the stretching process, as shown in Figure 6, the first connecting sheet 13A, the second connecting sheet 13B, and the third connecting sheet 14 are deformed within the bag body 40 so that they extend in the opposing direction Z. The bottom 14a is formed by the third connecting sheet 14 extending in the opposing direction Z. At this time, the heater blocks 105A and 105B are pressed against the packaging container 1 in the first direction X. Preferably, the heater blocks 105A and 105B are preheated to a temperature at which the outer layers of the film material constituting the bag body 40 can be welded together. By pressing the heater blocks 105A and 105B against the container, the connecting sheets 13A, 13B, and 14 become easier to stretch in the opposing direction Z. The packaging container shaping member 10, which is a three-dimensional box-like structure C2 that extends in the opposing direction Z, is a cylindrical body with a rectangular cross-section. The bottom 14a covers one of the openings of the cylindrical body.

[0044] When the heater blocks 105A and 105B are pressed against the surface, the heat seal portions 46A and 46B, which are side flaps, bend in the opposite direction Z. For example, the heat seal portions 46A and 46B are welded to the parts of the flat surface 41B other than the heat seal portions 46A and 46B themselves. The bag body 40 has protruding portions 54A and 54B that protrude from the third connecting sheet 14 of the packaging container shaping member 10 toward the first side Y1. The protruding portions 54A and 54B are formed in a triangular shape, with the length in the opposing direction Z gradually decreasing as they move toward the first side Y1. The protruding portions 54A and 54B are formed at the ends of the first side X1 and the second side X2, respectively, on the surfaces of the flat portions 41A and 41B that face the first side Y1.

[0045] During the stretching process, suction from hoses 101A and 101B is stopped, and suction cups 100A and 100B are removed from the flat sections 41A and 41B.

[0046] Next, in the first bending process, as shown in Figure 7, the heater block 106 is pressed against the packaging container 1 from the first side Y1 toward the second side Y2. When the heater block 106 is pressed, the protrusions 54A and 54B bend inward in the first direction X. The protrusions 54A and 54B are welded to the surfaces of the flat portions 41A and 41B that face the first side Y1.

[0047] Next, in the filling process, the contents are filled between the front sheet 11 and the back sheet 12 of the packaging container shaping member 10 through the opening 47 of the bag body 40. Once the filling of the contents is complete, the heater blocks 105A, 105B, and 106 are separated from the packaging container 1. Next, in the second folding process, the same process as in the stretching process and the first folding process is performed to close the opening 47 of the bag body 40 and form a top flap 56 on the packaging container 1, as shown in Figure 8. The top flap 56 is folded in the opposing direction Z and welded to the surface of the flat sections 41A and 41B facing the second side Y2. As a result, protruding portions 57A and 57B are formed on the top flap 56, protruding to the first side X1 and the second side X2, respectively, from the packaging container shaping member 10. The protruding portions 57A and 57B are welded to the surfaces of the flat sections 41A and 41B facing the first side X1 and the second side X2, respectively. Once the second folding process is complete, the entire manufacturing process is finished, and the contents-filled packaging container 2 shown in Figure 3 is produced.

[0048] As described above, in the packaging container shaping member 10 of this embodiment, the packaging container shaping member 10 is housed inside the bag body 40 through the opening 47 of the bag body 40. The first connecting sheet 13A, the second connecting sheet 13B, and the third connecting sheet 14, which were folded in opposing directions Z respectively, are deformed so that they extend in opposing directions Z. This secures a space between the front sheet 11 and the back sheet 12. The front sheet 11, the back sheet 12, and the connecting sheets 13A and 13B as a whole are formed in a rectangular tubular shape, but the outer edges of the first side Y1 of the front sheet 11 and the back sheet 12 are connected by the third connecting sheet 14 which extends in opposing directions Z. For this reason, the third connecting sheet 14 braces against forces acting from the outside of the bag body 40 in the opposing direction Z and effectively repels the pressure that seals the protruding parts 54A and 54B to the bottom. Therefore, since it can effectively withstand external forces even without a retaining plate, the process of fitting and removing the retaining plate as in conventional technology is unnecessary, and thus the filling speed can be increased. Furthermore, since it does not require an adhesive device 169 with a retaining plate, it is not necessary to unnecessarily enlarge the manufacturing equipment for the contents-filled packaging containers 2, and it is possible to increase the number of contents-filled packaging containers 2 manufactured per unit time, and it can also be handled with a general-purpose filling device.

[0049] The first connecting sheet 13A is folded so as to be convex toward the first side X1, the second connecting sheet 13B is folded so as to be convex toward the second side X2, and the third connecting sheet 14 is folded so as to be convex toward the first side Y1. The folded first connecting sheet 13A, the second connecting sheet 13B, and the third connecting sheet 14 do not overlap with the front sheet 11 and the back sheet 12 in the opposing direction Z. Therefore, the length of the packaging container shaping member 10 in the opposing direction Z can be made thinner. The third connecting sheet 14 has a first bottom edge connecting piece 25, a second bottom edge connecting piece 26, a first bottom edge hinge 27, a second bottom edge hinge 28, and a third bottom edge hinge 29. When the folded third connecting sheet 14 is extended in the opposing direction Z, the first bottom edge connecting piece 25 and the second bottom edge connecting piece 26 rotate around the first bottom edge hinge 27, the second bottom edge hinge 28, and the third bottom edge hinge 29, respectively, and the first bottom edge connecting piece 25 and the second bottom edge connecting piece 26 are positioned along the opposing direction Z. Therefore, against a force acting from the outside of the bag body 40 in the opposing direction Z, the first bottom edge connecting piece 25 and the second bottom edge connecting piece 26, which are positioned along the opposing direction Z, brace themselves in the opposing direction Z. Thus, they can withstand external forces in the opposing direction Z more effectively. Note that a hinge is also a fold line.

[0050] Furthermore, in the packaging container 1 of this embodiment, the contents can be filled between the front sheet 11 and the back sheet 12 through the opening 47 of the bag body 40 from a predetermined side D of the packaging container 1. Furthermore, in the contents-filled packaging container 2 of this embodiment, the first connecting sheet 13A, the second connecting sheet 13B, and the third connecting sheet 14 are arranged to extend in the opposing direction Z, thereby effectively withstanding external forces and enabling a faster filling speed. The contents can be placed inside the packaging container shaping member 10, which has a space secured between the front sheet 11 and the back sheet 12. Then, by closing the opening 47 of the bag body 40, the contents can be stored in the bag body 40.

[0051] Furthermore, in the manufacturing method of this embodiment, the first connecting sheet 13A, the second connecting sheet 13B, and the third connecting sheet 14 are each deformed to extend in the opposing direction Z, thereby effectively withstanding external forces and increasing the filling speed. The contents can be placed inside the packaging container shaping member 10, which has a space secured between the front sheet 11 and the back sheet 12. Then, by closing the opening 47 of the bag body 40, the contents can be stored in the bag body 40.

[0052] The packaging container shaping member 10 and manufacturing method of this embodiment can be modified in various ways, as described below. As shown in Figure 9, the third connecting sheet 14 may be folded so as to be convex toward the second side Y2 relative to the packaging container shaping member 10 of this embodiment. The third connecting sheet 14 is a so-called inner gusset.

[0053] Furthermore, the contents-filled packaging container 2 may be produced in-line (bulk manufacturing). In this case, for example, a strip of film material is unwound from a film roll in which multiple film materials are wound together in a strip-like manner. Then, female members 50, male members 51, etc., that constitute the zipper 42 are attached to both ends of the strip of film material in the width direction. The strip of film material is folded in half in the width direction to form a connecting section, and then heat-sealed at predetermined lengths. In a folded strip of film material, the packaging container shaping member 10 in a flat bag state C1 is inserted through each opening formed at the end opposite to the connecting portion in the width direction. At this time, the third connecting sheet 14 of the packaging container shaping member 10 is inserted so as to abut against the connecting portion. A folded strip of film material is cut at the center of the heat-sealed portion in the longitudinal direction of the strip of film material to produce a flat bag-like packaging container C1.

[0054] Next, the contents-filled packaging container 2 is manufactured by continuously performing the opening process, stretching process, first folding process, filling process, and second folding process in an in-line manner.

[0055] Although one embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and modifications, combinations, deletions, etc., of the configuration are also included without departing from the spirit of the present invention. For example, in the above embodiment, the bag body 40 does not need to have a zipper 42. The bag body may be a two-sided sealed bag in the shape of a tube. [Explanation of symbols]

[0056] 1 Packaging container 2. Packaging container with contents 10,10b Shaping members for packaging containers 11 Front sheet 12 Back side sheet 13A First connecting sheet 13B Second connecting seat 14. Third connecting seat 25 1st bottom edge connection piece (1st connection piece) 26 2nd bottom edge connection piece (2nd connection piece) 27. First bottom edge hinge (first hinge) 28. Second bottom edge hinge (second hinge) 29. Third bottom edge hinge (third hinge) 40 bags (main body) 47 Aperture D The designated side X 1st direction X1,Y1 First side X2,Y2 2nd side Y Second direction Z opposite direction

Claims

1. A packaging container comprising a bag body made of film, and a shaping member for a packaging container having a tubular body with a rectangular cross-section when formed into a three-dimensional shape, and being housed inside the bag body, The shaping member for the packaging container is, A front sheet and a back sheet are arranged so as to face each other, A first connecting sheet that connects the outer edges of the front sheet and the back sheet in the first direction along the front sheet, A second connecting sheet that connects the outer edges of the second side in the first direction of the front sheet and the back sheet, A third connecting sheet connects the outer edges of the front sheet and the back sheet in the first direction in a second direction that is parallel to the front sheet and intersects the first direction, Equipped with, The third connecting sheet is A first bottom edge connecting piece extending from the edge of the front sheet, A second bottom edge connecting piece extending from the edge of the back sheet, A first bottom edge hinge connects the first bottom edge connecting piece and the front sheet, A third bottom edge hinge connects the second bottom edge connecting piece and the back sheet, It has a second bottom edge hinge that connects the first bottom edge connecting piece and the second bottom edge connecting piece, A packaging container in which, when the shaping member for the packaging container is formed into a three-dimensional shape, the third connecting sheet extends in opposing directions with respect to the front sheet and the back sheet, the third connecting sheet is laid out substantially flat at the bottom of the bag body, and a protruding portion that protrudes more than the third connecting sheet is welded to the bottom of the bag body.

2. The first connecting sheet is folded so as to be convex toward the first side in the first direction, The second connecting sheet is folded so as to be convex toward the second side in the first direction, The packaging container according to claim 1, wherein the third connecting sheet is folded so as to be convex toward the first side in the second direction.

3. The packaging container according to Claim 1, The packaging container shaping member for the packaging container, wherein the first connecting sheet, the second connecting sheet, and the third connecting sheet are arranged so as to extend in the opposing directions, and the contents are placed within the packaging container shaping member. Equipped with, A packaging container containing contents, with the opening of the bag body closed.

4. A method for manufacturing a packaged container with contents, wherein the packaged container described in Claim 1 is filled with contents, Open the periphery of the opening of the bag body, Within the bag body, the first connecting sheet, the second connecting sheet, and the third connecting sheet are deformed so that they extend in the opposing directions. The contents are filled between the front sheet and the back sheet of the packaging container shaping member through the opening of the bag body. A method for manufacturing a packaging container containing contents, comprising closing the opening of the bag body.

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