JP7292604B2 - Cartons with flanges and their blanks - Google Patents

Description

The present invention is a paper used for packaging foods such as instant noodles, udon, pasta, gratin, various rice bowls, chilled foods, frozen foods, frozen desserts, confectionery, and non-foods such as aromatics, detergents, waxes, and hair styling products. The present invention relates to a flanged paper container having an integral outwardly directed flange on the upper opening edge to which a lid can be attached, and to a blank thereof.

Conventionally, there is a paper container with a rectangular flange having a top opening made from a single blank having a shape as disclosed in Patent Document 1. By heat-sealing the periphery of the material and the flange, it is used for packaging various foods.

Furthermore, in forming the flanges of conventional rectangular flanged paper containers, through holes, which are structural defects, occur in the flanges located at the corners of the rectangular shape. It is In addition, the through-hole penetrates from the upper surface to the lower surface of the blank, and there is a possibility that the contents may seep through the through-hole.

In addition, since the flange is made of one sheet of paper, the strength may be insufficient if the weight of the content is large. In addition, since there is no protection for the end face of the edge of the flange, there is a risk that the stiffness of the paper material will be reduced and the strength of the flange will be reduced if it is immersed in moisture or a highly permeable liquid.

The invention of Patent Document 1 will be described with reference to FIGS. 14 to 16. FIG. Since the drawing is bilaterally symmetrical, the reference numerals are shown only on the right half.
First, the blank from which the flanged paper container 90 is obtained will be described. FIG. 14 shows a blank 60 for the flanged paper container 90, and FIG. 15 is an enlarged view of a corner portion of the blank 60 of FIG. A first side plate 62 is connected to each of two opposing bottom plate first sides 71 of a rectangular bottom plate 61 via a mountain fold line. A first edge piece 63, which is a constituent member of the flange, is connected to the outer edge 72 of the first side plate on the opposite side via a valley fold line. First peninsula-shaped pieces 631 extending in the lateral direction (longitudinal direction of the first edge piece 63) are provided at the left and right ends of the first edge piece 63 (ends opposed to the longitudinal direction of the first edge piece 63). It is

Left and right first side plate sides 73 of the first side plate 62 (sides opposed to the width direction of the first side plate 62 in the container form) are respectively joined with inverted triangular first folding joints via mountain fold lines. A plate 621 is continuously provided, and a joint edge piece 622 is continuously provided via a valley fold line to the outer side 75 of the first folded joint plate 621 on the side opposite to the bottom plate 61 of the first folded joint plate 621 . .

The joining edge piece 622 forms the same plane as the first peninsular piece 631 through the notch. The cut end of the cut that separates the first peninsula-shaped piece 631 from the joint edge piece 622 and the first folding joint plate 621 is the mountain fold of the first side plate side edge 73 of the first side plate 62 . line, the valley fold line of the first side plate outer edge 72 of the first side plate 62, and the valley fold line of the first fold joint plate outer edge 75 of the first folding joint plate 621 reach a confluence point L. . Due to this cut, the first peninsula-shaped piece 631 is separated from the joining edge piece 622 and the first folding joining plate 621 during box making.

Second side plates 64 are connected to the other two opposing bottom plate second sides 81 of the bottom plate 61 via mountain fold lines. A second edge piece 65, which is a constituent member of the flange, is connected to the outer edge 82 of the second side plate on the opposite side through a valley fold line. Second peninsula-shaped pieces 651 extending in the lateral direction (longitudinal direction of the second edge piece 65) are provided at the left and right ends of the second edge piece 65 (ends opposed to the longitudinal direction of the second edge piece 65). is provided.

During box making, the upper portion of the mountain fold line of the first side plate side edge 73 of the first side plate 62 and the upper portion of the valley fold line of the second side plate side edge 83 of the second side plate 64 are properly aligned. The second peninsula-shaped piece 631 of the first edge piece 63 that has been folded into the valley is placed on the upper surface of the first peninsula-shaped piece 631 of the first edge piece 63 in the overlapping state (the state where the gathering point M overlaps with the gathering point L). If the lower surface of the piece 651 is overlapped and heat-sealed, even if a fine through hole is formed at the gathering point L to which the cut end of the first peninsula-shaped piece 631 reaches, this portion becomes the second side plate. The second side plate side edge 83 of 64 is covered with the portion of the converging point M which is the upper part of the valley fold line.

Further, a projecting piece 66 is integrally provided at the end of each of the second peninsular pieces 651 on the side of the second side plate 64 . The projecting piece 66 is provided so as to be positioned only in the area above the upper surface of the first edge piece 63 to which the first peninsular piece 631 is continuous after box making. It is provided so as not to overlap the bent portion of the valley fold line between the side plate 62 and the first edge piece 63 .

Since the packaging material constituting the blank 60 is a thermoplastic resin layer having heat-sealing properties on both sides, the heat-sealing is performed with the upper surface of the first edge piece 63 and the lower surface of the projecting piece 66 facing each other. , the protrusion piece 66 is heat-sealed within the heat-sealing region of the first edge piece 63 . In this case, since the projecting piece 66 does not straddle the portion of the valley fold line between the first side plate 62 and the first edge piece 63, the projecting piece 66 does not bend and forms a flat plate. is adhered to the first edge piece 63 as it is.

Assembly to obtain the flanged paper container 90 from the blank 60 is performed as follows. That is, the first side plate 62 and the second side plate 64 are folded and assembled into a tray shape, and the inner surfaces of the first folding joint plate 621 and the second folding joint plate 641 are adhered to each other. Next, the first folding joining plate 621 and the second folding joining plate 641 which are adhered are folded toward the second side plate 64 side. At the same time, the first edge piece 63, the second edge piece 65, and the joining edge piece 622 are each folded into the valley, and the first folding joining plate 621 and the second folding joining plate 641 that are adhered are attached to the second side plate. 64, the upper surface of the joining edge piece 622 and the lower surface of the second edge piece 65 overlapping thereon face each other, and the joining edge piece 622 and the second edge piece 65 that face each other are brought into contact with each other. By heat-sealing and bending the first side plate 62 and the second side plate 64, the upper surface of the first peninsular piece 631 and the lower surface of the second peninsular piece 651 face each other, and the first peninsula By heat-sealing the shaped piece 631 and the second peninsula shaped piece 651, the flange 92 formed by connecting the first edge piece 63 and the second edge piece 65 is formed, and the flanged paper container 90 is assembled. (Fig. 16).

At each corner of the flange 92 of the flanged paper container 90, the second peninsular piece 651 is superimposed on the first peninsular piece 631 and adhered by heat sealing. A converging point L above the mountain fold line of the first side plate side edge 73 of the side plate 62 is a meeting point M above the valley fold line of the second side plate side edge 83 of the second side plate 64. A densely stacked paper container is obtained. When the flange 92 is formed in the flanged paper container 90, the projection piece 66 is thermally welded to the upper surface of the first edge piece 63 by heat sealing. The flanged paper container 90 is assembled so as to be positioned only within the area of the heat-sealed surface of the first edge piece 63 without covering the face plate 62 side.

Japanese Patent No. 5743618 JP 2009-292537 A

However, in the invention of Patent Literature 1, if the content of the container is powdery or viscous, it will not leak, but if it is liquid, there is a risk of leakage.

That is, when the flanged paper container 90 is assembled by the paper container assembling apparatus, the first side plate 62 and the second side plate 64 connected to the bottom plate 61 are folded from the mountain fold line. , due to factors such as assembly accuracy of the container and variations in blank quality, the upper part of the mountain fold line at the first side plate side edge 73 of the first side plate 62 and the second side plate side of the second side plate 64 The paper container may be assembled in a state where the upper portion of the valley fold line of the side 83 does not overlap at a predetermined position and is slightly separated. Then, the blank 60 is heat-sealed in the above state. As a result, the protruding piece 66 positioned on the second peninsular piece 651 may be separated from the gathering point L and floated.

In addition, since the size and shape of the projecting piece 66 are not specified, the effect of preventing the gap between the lid member and the projecting piece 66 is not certain. The problem of leakage of the contents from the through hole cannot be solved.
Furthermore, when the flanged paper container 90 is viewed from above, even if the through hole at the meeting point L of the flange 92 is blocked by the projection piece 66, the blocking area is not large enough. Alternatively, in the case of permeable contents, the contents may seep through the end face of the blank 60 of the protruding piece 66 .

Moreover, in the flanged paper container of Patent Document 2, the flanges are folded back and stacked, but the structure of the corners of the container is complicated, and it cannot be easily assembled.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a flanged paper container in which the flanges are reinforced by folding back the flanges and the outer edges of the flanges are protected.
Another object of the present invention is to provide a flanged paper container that has a simple blank configuration and is easy to assemble.

Furthermore, it is possible to reliably block the through holes generated at the meeting point L and the meeting point M of the flanges in the conventional flanged paper container, and when the contents are filled and the lid material is sealed, the contents will be gathered at the flanges. To provide a flanged paper container that does not leak from through holes formed at a point L and a gathering point M.

The present invention has solved the above problems by the following aspects.
That is, the first aspect of the present invention is a blank 10 for a flanged paper container 50,
The blank 10 includes an n-sided bottom plate 11 having an even number of corners of 4 or more,
One of the n sides of the bottom plate 11 is defined as the first bottom plate side 31, and the side of the bottom plate 11 adjacent in one direction to the first bottom plate side 31 is defined as the second bottom. the face plate side 41, and sequentially from the third bottom plate side 31 to the n-th bottom plate side 41,
The odd-numbered side plates 12 are connected to each of the odd-numbered bottom plate sides 31 via the mountain fold lines, and the even-numbered side plates 12 are connected to each of the even-numbered bottom plate sides 41 via the mountain fold lines. A side plate 14 is continuously provided,
The sides 33 of the odd-numbered side plates 12 located on both sides in the circumferential direction of the blank 10 are folded into the corners of the bottom plate 11 in an inverted triangular shape with odd-numbered folds via mountain fold lines. one side of the joint plate 121,
The even-numbered sides 43 of the even-numbered side plates 14 located on both sides in the circumferential direction of the blank 10 are folded into even-numbered inverted triangles with respect to the corners of the bottom plate 11 via valley fold lines. one side of the joint plate 141,
The other side 34 of the odd-numbered folded joint plate 121 arranged in the peripheral direction of the blank 10 and the other side 44 of the even-numbered folded joint plate 141 arranged in the peripheral direction of the blank 10 and form a common side that forms the mountain fold line,
Each of the odd-numbered folding joint plates 121 has a joining edge piece 122 connected to the outer edge 35 of the odd-numbered folding joint plate 121 on the edge portion of the flanged paper container 50 via a valley fold line. is set up,
On each of the odd-numbered side plates 12, on the outer edge 32 of the odd-numbered side plates 12 on the edge of the flanged paper container 50, the odd-numbered edge is provided via the valley fold line. The piece upper part 13 is continuously provided,
end portions 131 of the odd-numbered edge piece top portions 13 extending from both ends of the odd-numbered edge piece top portions 13 in the direction along the edge of the flanged paper container 50 are provided,
On the outer edge 42 of the even-numbered side plate 14 on the side of the flanged paper container 50 of the even-numbered side plate 14, the even-numbered edge piece upper part 15 is formed through the valley fold line. connected,
end portions 151 of the even-numbered edge piece tops 15 extending from both ends of the even-numbered edge piece top portions 15 in the direction along the edge of the flanged paper container 50 are provided,
On each of the odd-numbered upper edge strips 13, the outer edge 36 of the odd-numbered upper edge strips 13 located on the edge portion of the flanged paper container 50 is attached to the outer edge 36 of the odd-numbered upper edge strips 13 via a valley fold line. The edge piece folding part 16 is continuously provided,
Each of the even-numbered upper edge strips 15 is provided with an outer edge 46 of the even-numbered upper edge strips 15 on the edge of the flanged paper container 50 via a valley fold line. The edge piece folding part 17 is continuously provided ,
In the width from the inside to the outside of the blank, the width at the longitudinal center of the odd-numbered edge fold is 50% of the width at the longitudinal center of the top of the odd-numbered edge. It is characterized by something .

According to aspects of this embodiment, the flange 52 can be reinforced in the flanged paper container 50 .

A second aspect of the present embodiment is that, in the first aspect, the width at the center of the longitudinal direction of the even- numbered folded edge portion 17 in the width from the inside to the outside of the blank 10 is It is characterized by being 50 % of the width at the longitudinal central portion of the even-numbered edge piece upper portion 15 .

According to aspects of this embodiment, the odd-numbered edge folds 16 provide sufficient reinforcement of the flange 52 . In addition, since the width of the odd-numbered folded edge portion 16 is appropriate, there is no problem in assembling the paper container.

A third aspect of this embodiment is the blank 10 for the flanged paper container 50,
The blank 10 includes an n-sided bottom plate 11 having an even number of corners of 4 or more,
One of the n sides of the bottom plate 11 is defined as the first bottom plate side 31, and the side of the bottom plate 11 adjacent in one direction to the first bottom plate side 31 is defined as the second bottom. the face plate side 41, and sequentially from the third bottom plate side 31 to the n-th bottom plate side 41,
The odd-numbered side plates 12 are connected to each of the odd-numbered bottom plate sides 31 via the mountain fold lines, and the even-numbered side plates 12 are connected to each of the even-numbered bottom plate sides 41 via the mountain fold lines. A side plate 14 is continuously provided,
The sides 33 of the odd-numbered side plates 12 located on both sides in the circumferential direction of the blank 10 are folded into the corners of the bottom plate 11 in an inverted triangular shape with odd-numbered folds via mountain fold lines. one side of the joint plate 121,
The even-numbered sides 43 of the even-numbered side plates 14 located on both sides in the circumferential direction of the blank 10 are folded into even-numbered inverted triangles with respect to the corners of the bottom plate 11 via valley fold lines. one side of the joint plate 141,
The other side 34 of the odd-numbered folded joint plate 121 arranged in the peripheral direction of the blank 10 and the other side 44 of the even-numbered folded joint plate 141 arranged in the peripheral direction of the blank 10 and form a common side that forms the mountain fold line,
Each of the odd-numbered folding joint plates 121 has a joining edge piece 122 connected to the outer edge 35 of the odd-numbered folding joint plate 121 on the edge portion of the flanged paper container 50 via a valley fold line. is set up,
On each of the odd-numbered side plates 12, on the outer edge 32 of the odd-numbered side plates 12 on the edge of the flanged paper container 50, the odd-numbered edge is provided via the valley fold line. The piece upper part 13 is continuously provided,
end portions 131 of the odd-numbered edge piece top portions 13 extending from both ends of the odd-numbered edge piece top portions 13 in the direction along the edge of the flanged paper container 50 are provided,
On the outer edge 42 of the even-numbered side plate 14 on the side of the flanged paper container 50 of the even-numbered side plate 14, the even-numbered edge piece upper part 15 is formed through the valley fold line. connected,
end portions 151 of the even-numbered edge piece tops 15 extending from both ends of the even-numbered edge piece top portions 15 in the direction along the edge of the flanged paper container 50 are provided,
On each of the odd-numbered upper edge strips 13, the outer edge 36 of the odd-numbered upper edge strips 13 located on the edge portion of the flanged paper container 50 is attached to the outer edge 36 of the odd-numbered upper edge strips 13 via a valley fold line. The edge piece folding part 16 is continuously provided,
Each of the even-numbered upper edge strips 15 is provided with an outer edge 46 of the even-numbered upper edge strips 15 on the edge of the flanged paper container 50 via a valley fold line. The edge piece folding part 17 is continuously provided,
In the width from the inside to the outside of the blank 10, the width at the center of the longitudinal direction of the even-numbered folded edge portion 17 is greater than the width at the center of the longitudinal direction of the even-numbered edge piece upper portion 15. It is characterized by being 50 % of its size.

According to this aspect of the embodiment, the flange 52 is sufficiently reinforced by the even-numbered edge folds 17 . Moreover, since the width of the even-numbered folded edge portion 17 is appropriate, there is no problem in assembling the paper container.

Either one of the first aspect and the third aspect may be implemented, or both may be implemented. The implementation thereof is appropriately selected according to the required specifications of the flanged paper container 50, the cost, and the like.

A fourth aspect of the present embodiment is the blank 10 for the flanged paper container 50,
The blank 10 includes an n-sided bottom plate 11 having an even number of corners of 4 or more,
One of the n sides of the bottom plate 11 is defined as the first bottom plate side 31, and the side of the bottom plate 11 adjacent in one direction to the first bottom plate side 31 is defined as the second bottom. the face plate side 41, and sequentially from the third bottom plate side 31 to the n-th bottom plate side 41,
The odd-numbered side plates 12 are connected to each of the odd-numbered bottom plate sides 31 via the mountain fold lines, and the even-numbered side plates 12 are connected to each of the even-numbered bottom plate sides 41 via the mountain fold lines. A side plate 14 is continuously provided,
The sides 33 of the odd-numbered side plates 12 located on both sides in the circumferential direction of the blank 10 are folded into the corners of the bottom plate 11 in an inverted triangular shape with odd-numbered folds via mountain fold lines. one side of the joint plate 121,
The even-numbered sides 43 of the even-numbered side plates 14 located on both sides in the circumferential direction of the blank 10 are folded into even-numbered inverted triangles with respect to the corners of the bottom plate 11 via valley fold lines. one side of the joint plate 141,
The other side 34 of the odd-numbered folded joint plate 121 arranged in the peripheral direction of the blank 10 and the other side 44 of the even-numbered folded joint plate 141 arranged in the peripheral direction of the blank 10 and form a common side that forms the mountain fold line,
Each of the odd-numbered folding joint plates 121 has a joining edge piece 122 connected to the outer edge 35 of the odd-numbered folding joint plate 121 on the edge portion of the flanged paper container 50 via a valley fold line. is set up,
On each of the odd-numbered side plates 12, on the outer edge 32 of the odd-numbered side plates 12 on the edge of the flanged paper container 50, the odd-numbered edge is provided via the valley fold line. The piece upper part 13 is continuously provided,
end portions 131 of the odd-numbered edge piece top portions 13 extending from both ends of the odd-numbered edge piece top portions 13 in the direction along the edge of the flanged paper container 50 are provided,
On the outer edge 42 of the even-numbered side plate 14 on the side of the flanged paper container 50 of the even-numbered side plate 14, the even-numbered edge piece upper part 15 is formed through the valley fold line. connected,
end portions 151 of the even-numbered edge piece tops 15 extending from both ends of the even-numbered edge piece top portions 15 in the direction along the edge of the flanged paper container 50 are provided,
On each of the odd-numbered upper edge strips 13, the outer edge 36 of the odd-numbered upper edge strips 13 located on the edge portion of the flanged paper container 50 is attached to the outer edge 36 of the odd-numbered upper edge strips 13 via a valley fold line. The edge piece folding part 16 is continuously provided,
Each of the even-numbered upper edge strips 15 is provided with an outer edge 46 of the even-numbered upper edge strips 15 on the edge of the flanged paper container 50 via a valley fold line. The edge piece folding part 17 is continuously provided,
Projections 18 protruding outward from the blank 10 extend from both ends of the even-numbered edge folded portions 17 , and lateral edges 47 at both ends of the even-numbered edge folded portions 17 extend outward from the blank 10 . from the end point of the projection 18 toward the inside of the blank 10 and the outer side 48 that is the outer edge of the even-numbered edge piece folded portion 17. The angle θE of the corner E formed by and a corner F of the bottom plate 11 closest to the corner E of the corners of the bottom plate 11 have the same angle θF.

To further explain the fourth embodiment, projecting portions 18 protruding outwardly of the blank 10 extend from both ends of the even-numbered edge folded portions 17, and the even-numbered edge folded portions 17 extend outward. From the outer edge of the blank 10 to the outer edge of the blank 10, the inner side 49 of the protrusion 18 directed toward the inner direction of the blank 10 and the outer edge of the even-numbered edge piece folded portion 17 The angle θE of the corner E formed by a certain outer edge 48 and the angle θF of the corner F of the bottom plate closest to the corner E among the corners of the bottom plate are substantially the same. It is characterized by

According to the aspect of the present embodiment, by making the angle θE and the angle θF substantially the same, the outer edge 48 of the even-numbered edge piece folded portion 17 and the even-numbered edge piece folded portion The inner side 49 of the protrusion 18 of 17 can come closer to the body 51 of the flanged paper container 50, so that the area where the stack of blanks 10 is doubled increases, and the flange can be further strengthened, and the appearance is also preferable.

A fifth aspect of the present embodiment is that when the flanged paper container 50 is assembled, the even-numbered edge flap portion 17 and/or the projection portion 18 of the even-numbered edge flap portion 17 is In the vicinity of the junction of the odd-numbered edge piece top 13 and the even-numbered edge piece top 15, the inward end point of the blank 10 of the notch 132 of the edge 131 of the odd-numbered edge piece top 13 and the odd-numbered A point A where the mountain fold line of the side edge 33 of the second side plate 12 and the valley fold line of the outer edge 32 of the odd side plate 12 converge, and the end portion 151 of the even-number edge piece upper portion 15 The outer edge 152 and the intersection point B of the outer edges 142 of the even-numbered folding joint plates 141 overlap or come close to each other, thereby blocking through-holes that may occur.

According to the aspect of the present embodiment, the even-numbered edge piece folding portion 17 and/or the projection portion 18 of the even-numbered edge piece folding portion 17 may occur at the converging points A and B of the corner portions of the flange 52 . Since the through-hole with leakage can be closed from the lower surface side, it is possible to provide the flange 52 that prevents the content from leaking.

A sixth aspect of the present embodiment is that , in the width from the inside to the outside of the blank 10, the width at the center of the longitudinal direction of the even-numbered edge folded portion 17 is the width of the even-numbered edge piece upper part 105% or more and 120% or less of the width of 15.

According to the aspect of the present embodiment, the even-numbered edge piece folded portions 17 can reliably close through holes that may occur at the meeting points A and B of the corner portions of the flange 52 from the lower surface side. , it is possible to provide a flange 52 from which contents are less likely to leak.

A seventh aspect of the present embodiment is a flanged paper container 50 formed by assembling the flanged paper container blank 10 in the first aspect.

To further explain aspects of the present embodiment, each of the side plates 12 and 14 is folded from the blank 10 of the flanged paper container to assemble into a hollow container shape, and the odd-numbered folding joint plates 121 and the even-numbered folding joint plates 121 are assembled into a hollow container. , and the vicinity of the folding joint plate outer edge 35 of the odd-numbered folding joint plate 121 and the vicinity of the outer edge 142 of the even-numbered folding joint plate 141 are joined to the odd-numbered side plate 12 from the side 33 of the even-numbered side plate 14 to the side 43 of the even-numbered side plate 14, and the two superimposed joint plates 121 and 141 are further bent toward the outer surface side of the even-numbered side plate 14 and overlapped. Then, the odd-numbered edge piece upper portion 13, the even-numbered edge piece upper portion 15, and the joining edge piece 122 are each valley-folded to overlap the two joining plates 121 and 141 on the even-numbered side plate 14. By aligning, the upper surface of the end 131 of the odd-numbered edge piece upper portion 13 and the lower surface of the end portion 151 of the even-numbered edge piece upper portion 15 facing each other are adhered, and the odd-numbered edge piece folded portion 16 is The outer edge 36 of the odd-numbered edge piece upper portion 13 is valley-folded, and the lower surface of the odd-numbered folded portion 16 and the lower surface of the odd-numbered edge piece upper portion 13 face each other and are joined. The edge piece folded portion 17 is valley-folded at the outer edge 46 of the even-numbered edge piece upper portion 15, and the even-numbered edge piece folded portion 17, the lower surface of the joint edge piece 122, and the The flanged paper container 50 has a flange 52 formed by joining the lower surface of the edge 131 of the upper edge of the odd-numbered edge and the lower surface of the upper edge of the even-numbered edge 15 to face each other.

According to the aspect of the present embodiment, it is possible to provide a flanged paper container 50 having a reinforced flange portion 52 and having a flange 52 with less leakage and excellent sealing performance.

In an eighth aspect of the present embodiment , projecting portions 18 protruding outward from the blank 10 are extended from both ends of the even-numbered edge folded portions 17, and both ends of the even-numbered edge folded portions 17 are extended. from the end point on the outer side of the blank 10 to the inner side 49 of the protrusion 18 toward the inner direction of the blank 10, and the outer edge of the even-numbered edge piece folded portion 17 The angle θE of the corner E formed by the outer edge 48 and the angle θG formed by the odd-numbered side plate 12 and the odd-numbered folding joint plate 121 in the vicinity of the flange 52 of the flanged paper container 50 are characterized by being the same .

According to the aspect of the present embodiment, the even-numbered edge piece folded portions 17 can reliably close through holes that may occur at the meeting points A and B of the corner portions of the flange 52 from the lower surface side. Therefore, it is possible to provide the flanged paper container 50 having the flange 52 that prevents the content from leaking and has sealing properties.

In addition, since the even-numbered folded edge portion 17 can be enlarged to the position of the body portion 51 of the flanged paper container 50, the even-numbered edge folded portion 17 can be folded back so that the upper portion of the edge is folded. 15, the overlapping area between the even-numbered edge piece folded portion 17 and the edge piece upper portion 15 can be increased. Therefore, the flange 52 can be strengthened.

Furthermore, since the even-numbered edge piece folded portion 17 overlaps the edge piece upper portion 15 as described above, the even-numbered edge piece folded portion 17 overlaps the joint edge piece 122 and the odd-numbered edge piece 122 . Since the end portion 131 of the edge piece upper portion 13 is partially or wholly hidden, the appearance becomes flat and excellent.

In a ninth aspect of the present embodiment , the side edges 37 at both ends in the direction along the edge of the flanged paper container 50 of the odd-numbered edge -folded portions 16 and the even-numbered edges opposite to the side edges 37 The interval (gap) between the second edge piece folded portion 17 and both side edges 47 in the direction along the edge of the flanged paper container 50 is 0.2 mm or more and 3 mm or less.

According to the aspect of this embodiment, when the flanged paper container 50 is molded to form the flange 52, the gap between the odd-numbered edge folded portion 16 and the even-numbered edge folded portion 17 is 3 mm. The smaller size strengthens the flange 52 by increasing the area of the double stack of blanks 10 on the flange 52 . In addition, since the gap is small, the appearance is also improved.
Further, since the gap is 0.2 mm or more, the odd-numbered edge piece folded portions 16 and the even-numbered edge piece folded portions 17 do not overlap, and the flatness of the flange 52 can be maintained.

According to the present invention, in the flanged paper container, the flange can be reinforced by folding back the flange, and the blank shape is simple, so that the flanged paper container can be easily assembled.
In addition, through-holes that may occur at the meeting point of the corners of the flanges of the paper container with flanges can be closed by the folded edge portion, and when the contents are filled and the lid material is sealed, the contents can be Objects are less likely to leak from the meeting points of the corners of the flange.

FIG. 2 is a diagram of a blank of a flanged paper container having a rectangular bottom plate according to the present embodiment. FIG. 2 is a drawing of a blank of a flanged paper container having a hexagonal bottom plate according to the present embodiment. 3 is an enlarged view of a corner portion of the blank of the hexagonal flanged paper container of FIG. 2. FIG. FIG. 2 is a diagram of a blank of a flanged paper container having an octagonal bottom plate according to the present embodiment. 5 is an enlarged view of a corner portion of the blank of the octagonal flanged paper container of FIG. 4. FIG. 1 is a perspective view of a paper container with a rectangular flange according to the present embodiment; FIG. 1 is a perspective view of an octagonal flanged paper container according to the present embodiment. FIG. FIG. 7 is an enlarged view of the corner portion of the rectangular flanged paper container of FIG. 6 as seen from below just before folding the edge flap portion. FIG. 7 is an enlarged view of the corner portion of the completed rectangular flanged paper container of FIG. 6 as seen from below. FIG. 7 is an enlarged view of a corner portion of the paper container with a rectangular flange shown in FIG. It is a diagram. FIG. 11 is an enlarged view of a corner portion of the rectangular flanged paper container of FIG. 10 after completion of the container as viewed from below. FIG. 8 is an enlarged view of the corner portion of the octagonal flanged paper container of FIG. 7 as seen from below in a state immediately before folding the edge flap portion. FIG. 8 is an enlarged view of the corner portion of the completed octagonal flanged paper container of FIG. 7 as seen from below. 1 is a view of a prior art flanged paper container blank; FIG. 15 is an enlarged view of a corner portion of the blank of the flanged paper container of FIG. 14; FIG. 1 is a perspective view of a flanged paper container according to the prior art; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments according to the present invention will be described in more detail with reference to the drawings. However, the present invention is not limited to these specifically exemplified forms and various specifically described configurations.
In addition, in each drawing, the sizes and ratios of members may be changed or exaggerated for the sake of clarity. In addition, for the sake of clarity, parts that are not necessary for explanation or repeated symbols may be omitted.

FIG. 1 is a blank diagram of a rectangular flanged paper container 50 of the first aspect according to the present embodiment. Since the bottom plate 11 has a rectangular shape, when the assembled paper container 50 with flanges is observed from above the opening surface, a rectangular container can be observed. (Fig. 6).

FIG. 1 is a drawing showing the blank 10 before assembling a paper container 50 with flanges. Since FIG. 1 is vertically and horizontally symmetrical, reference numerals are shown only in the upper right half. Although the bottom plate 11 of the blank 10 shown in FIG. 1 has a rectangular shape, it can be developed into a polygonal shape having an even number of corners, such as a hexagonal shape or an octagonal shape.

In the rectangular flanged paper container 50, one of the four sides of the rectangular bottom plate 11 is the first bottom plate side 31, and the counterclockwise direction of the first bottom plate side 31 is The sides of the bottom plate 11 that are adjacent in the direction are the second bottom plate side 41 , the third (odd-numbered) bottom plate side 31 , and the fourth (even-numbered) bottom plate side 41 . The fourth bottom plate side 41 is adjacent to the first bottom plate side 31 and the rectangle of the bottom plate 11 is closed.

In this embodiment, the bottom plate has a polygonal shape with four or more even-numbered corners. The bottom plate sides of the type, specifically, the odd-numbered bottom plate sides 31 and the even-numbered bottom plate sides 41 are not adjacent to each other.

The odd-numbered side plates 12 are connected through the first and third odd-numbered bottom plate sides 31, and the second and fourth even-numbered bottom plate sides 41 are connected. The even-numbered side plates 14 are connected via the . That is, around the bottom plate 11, two of the odd-numbered side plates 12 and two of the even-numbered side plates 14 are alternately arranged.

The odd-numbered side plates 12 are connected to each of the odd-numbered bottom plate sides 31 via mountain fold lines. Via the mountain fold lines on each of the odd-numbered sides 33 located on both sides in the circumferential direction of the blank 10 of the odd-numbered side plates 12, odd-numbered inverted triangles with the corners of the bottom plate 11 as vertices are formed. is provided with one side of the folding joint plate 121 of .

Similarly, the even-numbered side plates 14 are connected to the even-numbered bottom plate sides 41 via mountain fold lines. The even-numbered sides 43 of the even-numbered side plates 14 positioned on both sides in the circumferential direction of the blank 10 are formed with the corners of the bottom plate 11 at the corners of the even-numbered side plates 11 via the valley fold lines. is provided with one side of the folded joint plate 141 .

The side edge 34 of the odd-numbered folded joint plate 121 opposite to the odd-numbered side plate 12 and the even-numbered folded joint plate 121 arranged in the circumferential direction of the blank 10 of the odd-numbered folded joint plate 121 and the even-numbered folded joint plate 121 The even-numbered side plates 14 arranged in the circumferential direction of the blank 10 of the plate 141 and the side 44 of the even-numbered folded joining plate 141 on the opposite side form a common side that forms a mountain fold line. there is

Then, on each of the odd-numbered folding joint plates 121, a joining edge piece is attached to the outer edge 35 of the odd-numbered folding joint plate 121 on the edge of the flanged paper container 50 via a valley fold line. 122 are connected.

On each of the odd-numbered side plates 12, the outer edge 32 of the odd-numbered side plate on the edge portion of the flanged paper container 50 is provided with the odd-numbered edge piece upper part 13 via the valley fold line. are connected.
Further, end portions 131 of the odd-numbered edge piece upper portions 13 are provided to extend in the direction along the edge portion of the flanged paper container 50 from both ends of the odd-numbered edge piece upper portions 13 .

In addition, the ends 131 of the odd-numbered edge piece upper portions 13 extending from both ends of the odd-numbered edge piece upper portions 13 in the direction along the edge of the flanged paper container 50 are connected to the joint edges through cuts 132 . It is connected to the piece 122 and the odd-numbered folding joint plate 121 .

The joint edge piece 122 forms the same plane with the end portion 131 of the odd-numbered edge piece upper portion 13 and the odd-numbered folding joint plate 121 through the notch 132 .
Then, the cut 132 is directed inward of the blank 10 from the outer edge 124 of the joint edge piece 122, and after contacting the outer edge 35 of the odd-numbered folded joint plate 121 at the tip thereof, the odd-numbered It bends in the direction of the edge piece upper part 13.

Furthermore, the notch 132 is formed on the extension line of the outer edge 35 of the odd-numbered folding joint plate 121, the mountain fold line of the side edge 33 of the odd-numbered side plate 12, and the side plate of the odd-numbered side plate 12. It reaches the convergence point A with the valley fold line of the outer edge 32 . Alternatively, the neighborhood before reaching may be set as the edge.

The notch 132 separates the odd-numbered end 131 and the odd-numbered fold joint plate 121 from the joint edge strip 122 when the flanged paper container 50 is assembled.

In addition, on the outer edge 42 of the even-numbered side plate 14 on the side of the flanged paper container 50 of the even-numbered side plate 14, the even-numbered edge piece upper part 15 is attached through the valley fold line. are connected.
Further, from both ends of the even-numbered edge piece upper portion 15, even-numbered edge piece upper end portions 151 extending in a direction along the edge portion of the flanged paper container 50 are provided.

In addition, on each of the even-numbered upper edge strips 15, an outer side 46 of the even-numbered upper edge strips 15 on the edge of the flanged paper container 50 is attached to the outer edge 46 via the valley fold line. edge piece folded portion 17 is continuously provided.

Further, on each of the even-numbered upper edge strips 15, an outer edge 46 of the even-numbered upper edge strips 15 located on the edge of the flanged paper container 50 is attached to the outer edge 46 via the valley fold line. edge piece folded portion 17 is continuously provided.

The side edges 44 of the even-numbered fold-in joint plates 141 forming a common side with the side edges 34 of the odd-numbered fold-in joint plates 121 are mountain-folded to form blanks 10 for the paper container 50 with flanges. The side plates 12 and 14 are folded to form a hollow container, and the odd-numbered folded joint plates 121 and the even-numbered folded joint plates 141 are overlapped. Then, the two overlapped folding joint plates 121 and 141 are further folded toward the outer surface side of the even-numbered side plate 14 and overlapped. Further, the odd-numbered edge piece upper portion 13, the even-numbered edge piece upper portion 15, and the joining edge piece 122 are each valley-folded.

Then, the upper surface of the end portion 131 of the odd-numbered edge piece upper portion 13 and the lower surface of the end portion 151 of the even-numbered edge piece upper portion 15, which are to face each other, are joined by this means.
After that, the odd-numbered edge piece folded portion 16 is folded into a valley fold at the outer edge 36 of the odd-numbered edge piece upper portion 13, and the lower surface of the odd-numbered edge piece folded portion 16 and the odd-numbered edge are folded. The lower side of the piece upper part 13 faces and is joined.

Furthermore, the outer edge 46 of the even-numbered edge piece upper portion 15 is valley-folded, the even-numbered edge piece folded portion 17 is folded back, and the lower surface of the even-numbered edge piece folded portion 17 is joined to the joining edge piece. The lower surface of 122, the lower surface of the end portion 131 of the odd-numbered edge piece upper portion 13, and the lower surface of the even-numbered edge piece upper portion 15 are joined together.

The joint edge piece 122 and the end portion 131 of the odd-numbered edge piece upper portion 13 partially exist between the even-numbered edge piece folded portion 17 and the edge piece upper portion 15 . Therefore, the even-numbered edge piece folded portion 17 and the joint edge piece 122 and the edge portion 131 of the odd-numbered edge piece upper portion 13 are tightly adhered to each other, and the connection is firm. However, since there is a gap corresponding to one blank stack between the even-numbered edge piece folded portion 17 and the edge piece upper portion 15, even if the gap is reduced by bending the blank, the even-numbered edge piece can be removed. The joint between the folded edge portion 17 and the upper edge portion 15 is rather weak, and depending on the situation, it may not be joined.

Through the above-described procedure, the flange 52 that is continuous in a circular fashion and reinforced by the folded edge portion is formed, and the rectangular flanged paper container 50 of the present embodiment is assembled. (Fig. 6).

An assembly procedure for obtaining the flanged paper container 50 from the blank 10 will be described. The upper surface of the blank 10 indicates the side that contacts the contents, and the lower surface indicates the opposite side. Further, the upper surface of the flanged paper container 50 indicates the surface on which the contents are put (top surface), and the lower surface indicates the opposite surface.

The odd-numbered side plates 12 and the even-numbered side plates 14 are folded to form a hollow container. The vicinity is heat-sealed from the side 33 of the odd-numbered side plate 12 to the side 43 of the even-numbered side plate 14 .

Next, the heat-sealed odd-numbered folding joint plates 121 and even-numbered folding joining plates 141 are folded toward the even-numbered side plates 14 . At the same time, the odd-numbered edge piece upper portion 13, the even-numbered edge piece upper portion 15, and the joint edge piece 122 are each valley-folded, and the odd-numbered folded joint plate 121 and the even-numbered folded joint plate 141 are heat-sealed. are bent to the outer surface side of the even-numbered side plates 14 and overlapped. As a result, the upper surface of the joining edge piece 122 and the lower surface of the even-numbered edge piece upper portion 15 overlapping thereon face each other, and the opposing joining edge piece 122 and the even-numbered edge piece upper portion 15 are heat-sealed. do.

By bending the odd-numbered side plates 12 and the even-numbered side plates 14, the upper surface of the end portion 131 of the odd-numbered edge piece upper portion 13 and the lower surface of the end portion 151 of the even-numbered edge piece upper portion 15 are bent. are heat-sealed against each other. The odd-numbered edge piece upper portion 13 and the even-numbered edge piece upper portion 15 are continuous.

The outer edge 36 of the odd-numbered edge piece upper portion 13 is valley-folded, the odd-numbered edge piece folded portion 16 is folded back, and the lower surface of the odd-numbered edge piece folded portion 16 is folded into the odd-numbered edge piece. The lower surface of the upper portion 13 is heat-sealed.

Further, the outer edge 46 of the even-numbered edge piece upper portion 15 is valley-folded, the even-numbered edge piece folded portion 17 is folded back, and the lower surface of the even-numbered edge piece folded portion 17 is joined to the joining edge piece. The lower surface of 122 is heat-sealed with the lower surface of the edge portion 131 of the odd-numbered edge piece upper portion and the lower surface of the even-numbered edge piece upper portion 15 .

By the above-described procedure, the flange 52 that is continuous in a circular fashion and reinforced by the folded edge portion is formed, and the rectangular flanged paper container 50 is assembled. (Fig. 6).

FIG. 2 shows a blank 10 of a flanged paper container 50 having a hexagonal bottom plate 11, and FIG. 3 is an enlarged view of a corner portion of FIG.
The bottom plate 11 does not have to be a regular hexagon, but it is desirable that the interior angles of the bottom plate 11 have the same size. In the case of a hexagon, it is 120°.

In the hexagonal flanged paper container 50, one of the six sides of the hexagonal bottom plate 11 is set as the first bottom plate side 31, and the counterclockwise direction of the first bottom plate side 31 is The side of the bottom plate 11 that is adjacent in the direction is defined as the second bottom plate side 41, the third (odd number) bottom plate side 31, the fourth (even number) bottom plate side 41, and the fifth bottom plate side 41, respectively. The (odd-numbered) bottom plate side 31 and the sixth (even-numbered) bottom plate side 41 . The sixth bottom plate side 41 is adjacent to the first bottom plate side 31 and the hexagonal shape of the bottom plate 11 is closed.

The odd-numbered side plates 12 are connected via each of the odd-numbered bottom plate sides 31 consisting of the first, third, and fifth bottom plate sides 31, and the even-numbered bottom plate consisting of the second, fourth, and sixth sides. The even-numbered side plates 14 are connected via each side 41 of the face plate. That is, around the bottom plate 11, the three odd-numbered side plates 12 and the three even-numbered side plates 14 are arranged alternately.

The sides and various plates provided at both ends of the blank 10 in the circumferential direction of the odd-numbered side plates 12, and the sides and plates provided in the outer edge direction of the blank 10 are similar to the rectangular bottom plate 11 described previously. It is the same component as the blank 10 . Further, the sides provided on the odd-numbered side plates 12 and the sides and plates connected to the plates are the same components as the blank 10 of which the bottom plate 11 is rectangular.

The sides and various plates provided at both ends of the blank 10 in the circumferential direction of the even-numbered side plates 14, and the sides and plates provided in the outer edge direction of the blank 10 are similar to the rectangular bottom plate 11 described above. It is the same component as the blank 10 . Further, the sides provided on the even-numbered side plates 14 and the sides and plates connected to the plates are the same components as the blank 10 of which the bottom plate 11 is rectangular.

Therefore, since the components of the blank 10 having the hexagonal bottom plate 11 are the same as the components of the rectangular blank 10 described above, the description of the configuration of the hexagonal blank 10 is omitted.

FIG. 4 shows a blank 10 of a flanged paper container 50 having an octagonal bottom plate 11, and FIG. 5 is an enlarged view of a corner portion of FIG.
The bottom plate 11 may not have a regular octagonal shape, but it is desirable that the internal angles of the bottom plate 11 are equal. In the case of an octagonal shape, it is 135°.
FIG. 7 shows a flanged paper container 50 having an octagonal bottom plate 11 .

In the octagonal flanged paper container 50, one of the eight sides of the octagonal bottom plate 11 is the first bottom plate side 31, and the first bottom plate side 31 is rotated counterclockwise. The side of the bottom plate 11 that is adjacent in the direction is defined as the second bottom plate side 41, the third (odd number) bottom plate side 31, the fourth (even number) bottom plate side 41, and the fifth bottom plate side 41, respectively. As the (odd-numbered) bottom plate side 31, the 6th (even-numbered) bottom plate side 41, the 7th (odd-numbered) bottom plate side 31, and the 8th (even-numbered) bottom plate side 41 there is The eighth bottom plate side 41 is adjacent to the first bottom plate side 31 and the octagonal shape of the bottom plate 11 is closed.

The odd-numbered side plates 12 are connected through the odd-numbered bottom plate sides 31 consisting of the 1st, 3rd, 5th and 7th bottom plate sides 31, and the 2nd, 4th, 6th and 8th sides. The even-numbered side plates 14 are connected via each of the even-numbered bottom plate side edges 41 . That is, around the bottom plate 11, the four odd-numbered side plates 12 and the four even-numbered side plates 14 are arranged alternately.

The sides and various plates provided at both ends of the blank 10 in the circumferential direction of the odd-numbered side plates 12, and the sides and plates provided in the outer edge direction of the blank 10 are the same as the previously described bottom plate 11, which is a rectangular blank. It has the same configuration as 10. Further, the configuration of each side provided on the odd-numbered side plates 12 and each side connected to each plate and each plate is the same as that of the rectangular blank 10 of the bottom plate 11 .

The sides and various plates provided at both ends of the blank 10 in the circumferential direction of the even-numbered side plates 14, and the sides and plates provided in the outer edge direction of the blank 10 are the same as the previously described bottom plate 11, which is a rectangular blank. It has the same configuration as 10. Further, the configuration of each side provided on the even-numbered side plates 14 and each side connected to each plate and each plate is the same as that of the blank 10 in which the bottom plate 11 is rectangular.

Therefore, since the constituent elements of the blank 10 having the bottom plate 11 having an octagonal shape are the same as the constituent elements of the rectangular blank 10 described previously, the description of the configuration of the octagonal blank 10 is omitted.

The method of assembling the flanged paper container 50 with the hexagonal bottom plate 11 and the flanged paper container 50 with the octagonal bottom plate 11 is the same as the method of assembling the flanged paper container 50 with the rectangular bottom plate 11. Therefore, the explanation is omitted.

The constituent elements of the blank 10 in the case where the bottom plate 11 has a polygonal shape with an even number of corners equal to or larger than a decagon are the same as the constituent elements of the rectangular blank 10 described above. Also in this case, it is desirable that the interior angles of the bottom plate 11 have the same size.

FIG. 8 is an enlarged view of even-numbered side surfaces and both ends of the flanged paper container 50 of FIG. It is a view in the middle of assembling the rectangular flanged paper container 50, and is a stage immediately before folding the respective edge piece folded portions 16 and 17 and joining them to the respective edge piece upper portions 13 and 15. .

FIG. 9 is an enlarged view of even-numbered side surfaces and both ends of the flanged paper container 50 after the rectangular paper container is completed through the processing steps of FIG.

At each corner of the flange 52 of the flanged paper container 50 shown in FIG. are superimposed and joined by heat sealing, and the valleys of the side edges 43 of the even-numbered side panels 14 are located at the converging point A, which is the upper part of the mountain fold line of the side edges 33 of the odd-numbered side panels 12. The converging point B, which is the upper part of the folding line, overlaps.

Furthermore, since the gathering point A is the end of the notch 132 of the odd-numbered edge piece upper portion 13, it is exposed on the end surface of the blank 10, which causes a through hole.
In addition, since the gathering point B is the intersection of the outer edge 152 of the end portion 151 of the even-numbered edge piece upper portion 15 and the outer edge 142 of the even-numbered folding joint plate 141, it is exposed on the end surface of the blank 10. It is a factor that causes perforation.

Since the converging points A and B, both of which are likely to form through holes, overlap, there is a risk of forming through holes at the corners of the flange. Therefore, at the stage of FIG. 8, in which the edge piece folding portions 16 and 17 are not folded back and heat-sealed, a through hole may be formed at the position where the gathering points A and B overlap. .

Here, the intersection of the outer side 48 of the even-numbered edge piece folded portion 17 and the inner side 49 of the projection portion 18 of the even-numbered edge piece folded portion 17 is defined as an intersection point E, and the angle thereof is defined as θE. . (Figs. 1, 3, 5).

Further, by assembling the flanged paper container 50, the corners E of the even-numbered folded portions 17 are located near the convergence points A and B of the flanges 52 of the body portion 51 of the flanged paper container 50. It will face the corner part. The corner portion is the angle at which the odd-numbered folded joint plate 121 and the odd-numbered side plate 12 are bent through the side edge 33 of the odd-numbered side plate 12, and the angle of the flange 52 is It is an angle in the neighborhood, and the angle is assumed to be an angle θG.
The angle .theta.G is substantially the same as the internal angle .theta.F of the corner F of the bottom plate 11 closest to the intersection E and the convergence points A and B. As shown in FIG.

This is because when the body portion 51 of the flanged paper container 50 is cut along an arbitrary horizontal plane (a plane parallel to the bottom plate), any cut surface has a substantially similar shape to the bottom plate. Further, since the bottom plate 11 and the flange 52 are substantially parallel, the bending angle θG of the body portion 51 near the flange 52 (the internal angle of the horizontal section of the body portion) is the side of the odd-numbered side plate 12. The angle .theta.F of the corner F of the bottom plate 11 connected to the lower end of the side 33 is substantially the same.

In terms of design, the angles θE, θF, and θG can be the same size. It is written that θG is substantially the same.

In the blank 10, by making the angle θE and the angle θF substantially the same, the outer sides 48 of the even-numbered edge piece folded portions 17 and the inner sides of the projection portions 18 of the even-numbered edge piece folded portions 17 are formed. The side 49 of the flanged paper container 50 can be brought close to the body 51 of the flanged paper container 50, so the appearance is favorable, and the flange 52 of the flanged paper container 50 can be further strengthened.

In this embodiment, the angle θE and the angle θF are substantially the same angle, and the width of the even-numbered edge piece folded portion 17 is substantially the same as the width of the even-numbered edge piece upper portion 15. Since the corners E are arranged so that the converging points A and B and the intersection point E are substantially coincident, as shown in FIG. Through-holes that may occur at converging points A and B at the even-numbered edge fold-back portions 17 and/or the projections 18 of the even-numbered edge fold-back portions 17 by bending the edge fold-back portions 17. can be closed from the bottom side.

In the flanged paper container 50, by making the angle θE and the angle θG substantially the same, the outer edge 48 of the even-numbered edge folded portion 17 and the projection of the even-numbered edge folded portion 17 Since the inner side 49 of the portion 18 can approach the body portion 51 of the flanged paper container 50, the appearance is favorable, and the flange 52 of the flanged paper container 50 can be further strengthened.

In this embodiment, the angle θE and the angle θG are substantially the same angle, and the width of the even-numbered edge piece folded portion 17 is substantially the same as the width of the even-numbered edge piece upper portion 15 . , the corner E is arranged so that the converging points A and B and the intersection E are substantially coincident, so that the outer edge 46 of the even-numbered edge piece upper portion 15 is valley-folded as shown in FIG. By bending the th edge piece folded portion 17, the even-numbered edge piece folded portion 17 can block through holes that may be formed at the converging points A and B from the lower surface side.

More desirably, the width of the even-numbered edge piece folded portion 17 is made larger than the width of the even-numbered edge piece upper portion 15, so that through-holes that may occur at the gathering points A and B are reliably formed. can be blocked. It is desirable that the width of the folded portion 17 of the even-numbered edge piece is 105% to 120% of the width of the upper portion of the even-numbered edge piece. If it is less than 105%, the ability to close the through hole may be inferior, and if it is more than 120%, interference between the even-numbered edge piece folded-back portions 17 and the body portion 51 of the flanged paper container 50 will become strong, and the container molding may be adversely affected.

Further, it is preferable that the width of the even-numbered edge piece folded portion 17 is set to a width larger than the width of the even-numbered edge piece upper portion 15 by 0.5 mm to 2 mm. If the thickness is less than 0.5 mm, the ability to block the through-hole may deteriorate. Molding may be adversely affected.

Further, the side edges 37 of the odd-numbered folded edge portion 16 at both ends in the direction along the edge of the flanged paper container 50 and the even-numbered edge folded portion 17 opposite to the side edge 37 are flanged. It is desirable that the distance (gap) between both ends of the paper container 50 in the direction along the edge of the paper container 50 and the side edges 47 be 0.2 mm or more and 3 mm or less.

When the flanged paper container 50 is molded to form the flange 52, it is preferable that the gap between the odd-numbered edge-folded portion 16 and the even-numbered edge-folded portion 17 is small. A smaller gap strengthens the flange 52 by increasing the area of the two stacks of blanks 10 on the flange 52 . In addition, since the gap is small, the appearance is also improved.

If the clearance exceeds 3 mm, the strength of the flange will decrease significantly. Further, if the gap is less than 0.2 mm, there is a risk that the odd-numbered folded edge portion 16 and the even-numbered edge folded portion 17 may overlap due to an error in assembling the flanged paper container 50 . be. If the thickness of the overlapped portion becomes large and the uniformity of the thickness of the flange is poor, the stability when the lid material is joined is lost. In addition, since the side edge of the edge piece folded portion that overlaps and is on the upper side becomes conspicuous, there is a risk that a step will be formed there and cause the edge to be peeled off.

10, the width of the odd-numbered edge folded portion 16 is about 50% of the width of the odd-numbered edge top portion 13, and the width of the even-numbered edge folded portion 17 is about 50% of the width of the even-numbered edge. FIG. 4 is a view during assembly of a blank 10 that is about 50% of the width of the upper strip 15, just prior to folding and joining the respective edge strip folds 16,17 to the respective said edge strip uppers 13,15; is the stage of

FIG. 11 is an enlarged view of even-numbered side surfaces and both corners of the flanged paper container 50 after the rectangular paper container is completed by proceeding with the processing steps of FIG.

Since the width of the even-numbered folded edge portion 17 is short, it does not reach the meeting points A and B of the flanges 52 of the flanged paper container 50, and does not have the function of closing the through hole. The flange 52 is reinforced because the material is doubled. It is effective in reducing the amount of blank material for applications where the through holes are not a problem or when the through holes are blocked by other means (for example, treatment with a sealing material, etc.).

In order to reinforce the flange 52 by the folded edge portion, it is desirable that at least the width of the folded edge portion is 50% or more of the width of the upper portion of the opposing edge piece.

In FIG. 11, the width of both the odd-numbered edge piece folded portion 16 and the even-numbered edge piece folded portion 17 is equal to the width of the odd-numbered edge piece upper portion 13 and the even-numbered edge piece upper portion 15. However, if the flange strength requirements are not high, the width of only one of the folded edge portions may be 50% or more of the width of the upper portion of the opposite edge piece.

FIG. 12 is an enlarged view of even-numbered side surfaces and both ends of the flanged paper container 50 of FIG. 7, and the flanges 52 of the flanged paper container 50 having an octagonal bottom plate are viewed from below. It is a view in the middle of assembling the paper container 50 with a flange, and is a stage immediately before folding the edge flap portions 16 and 17 and joining the edge edge upper portions 13 and 15 .

FIG. 13 shows a state in which the flanged paper container 50 is completed by advancing the processing process from FIG.

Since the bottom plate 11 described previously is the same as the rectangular blank 10, the effect of closing the through hole is omitted.

The width of the joint edge strip 122 is preferably narrower than the width of the even-numbered edge strip upper portion 15 . This is because the outer edges 46 of the even-numbered edge piece upper portions 15 and the joint edge pieces 122 do not overlap with each other when viewed from the upper surface side, so that the outer edges 46 of the even-numbered edge piece upper portions 15 are recessed. This is because the even-numbered edge piece folding portions 17 can be folded smoothly when folding.

The width of the connecting edge strip 122 is preferably 0.5 mm to 2 mm narrower than the width of the even-numbered edge strip upper portion 15 . If this numerical value is smaller than 0.5 mm, the outer edge 46 of the even-numbered edge piece upper portion 15 and the joint edge piece 122 overlap when the assembly accuracy of the flanged paper container 50 is poor. There is a possibility that the folding of the even-numbered edge piece folded portions 17 may be hindered. On the other hand, if this value is larger than 3 mm, an effective joint area cannot be obtained, and the joint strength between the joint edge piece 122 and the even-numbered edge piece upper portion 15 is deteriorated.

Here, the material of the blank 10 will be described. The blank 10 is a laminate in which a thermoplastic resin layer is provided on one side or both sides of a paper base layer mainly made of paper. As the paper, paperboard such as white board, manila board, base paper for cups, cardboard, and ivory paper is used. Paper used for food containers should preferably not contain recycled paper. The basis weight of the paper is appropriately determined depending on the size of the container and the application, but it is preferable to use 150 to 400 g/m ² . If it is less than 150 g/m ² , the rigidity of the container is low and the container is easily deformed. On the other hand, if it exceeds 400 g/m ² , the thickness of the blank 10 increases, so creases are likely to occur during folding along the creases. Moreover, the excessive basis weight of paper causes cost increase.

Further, the intermediate layer may be provided with a film layer, if necessary.
When the flanged paper container 50 is required to have water vapor barrier properties and oxygen barrier properties, aluminum foil, aluminum-deposited polyethylene terephthalate, polyvinylidene chloride film (PVDC), and polyvinyl alcohol film (PVA) are used as the gas barrier layer and the film layer. , ethylene-vinyl alcohol copolymer film (EVOH), gas-barrier nylon film, gas-barrier polyethylene terephthalate film, etc., and inorganic oxidation by vapor-depositing inorganic oxides such as aluminum oxide and silicon oxide on polyethylene terephthalate film, etc. Using a gas barrier coating layer such as a vapor deposition film, a polyvinylidene chloride coating, a coating containing a water-soluble resin and an inorganic stratiform compound, or a resin layer composed of a coating obtained by reacting a metal alkoxide or its hydrolyzate with an isocyanate compound. can be done.

The thermoplastic resin layers provided on both sides of the paper base material layer are joined at the necessary locations to retain the shape of the flanged paper container 50, and the required locations are sufficiently joined so that the content It has a role to prevent the leakage of In the flanged paper container 50 of the present embodiment, it is not necessary to join the body 51 of the flanged paper container to prevent leakage of the contents, but the members of the flange 52 are sufficiently joined together to prevent the contents from leaking. leakage must be prevented. As the material for the thermoplastic resin layer, polyethylene-based resins are preferable, such as low-density polyethylene (LDPE), linear low-density polyethylene (L-LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), Ethylene-vinyl acetate copolymer (EVA), ionomer resin, ethylene-acrylic acid copolymer (EAA), ethylene-ethyl acrylate copolymer (EEA), ethylene-methacrylic acid copolymer (EMAA), ethylene - Methyl methacrylate copolymer (EMMA), acid-modified polyolefin resin obtained by modifying polyethylene resin with unsaturated carboxylic acid such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, polyvinyl acetate A system resin or the like can be exemplified, and if necessary, an additive may be added as appropriate. Alternatively, a multi-layer structure consisting of LDPE/MDPE/LDPE or LDPE/HDPE/LDPE may be used.

In addition, when heat resistance is required, the thermoplastic resin layer can be made of polypropylene, and homopolypropylene, random polypropylene, block polypropylene, and two or three blended resins selected from the above resins can be used. . In addition, the polyethylene-based resin described in the preceding paragraph can be blended with the above single resin or blended resin in order to facilitate processing of the container. The process of processing the container includes, for example, a process of coating a paper substrate layer with a thermoplastic resin layer and a process of assembling the container.
The amount of the polyethylene resin to be added is desirably 5% by weight to 50% by weight. If it is less than 5% by weight, no improvement in workability can be expected, and if it exceeds 50% by weight, a decrease in heat resistance is observed.

For applications that require higher heat resistance than polypropylene, such as heating of oily contents or applications where the container is cooked in a microwave oven or hot air oven, it is laminated to the paper base layer. A resin having a higher melting point may be used for the surface resin layer. Examples of the above resin include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polymethylpentene resin (TPX), and the like.

Unlike a paper cup, the flanged paper container 50 of the present embodiment does not have a thread bottom portion, so unlike a paper cup, the thread bottom portion is not heated and scorched during microwave cooking. Due to such characteristics, by using a more heat-resistant resin for the surface resin layer, the paper container becomes more suitable for microwave cooking.

As a method for laminating the laminate of the blank 10, various bonding methods are used, but the preferred method is an extrusion coating method in which both sides or one side of a base material layer mainly made of paper is coated with a molten thermoplastic resin. desirable. When laminating a film to a paper substrate layer, a method suitable for the material to be processed, such as a dry lamination method or an extrusion coating method, is selected.

The original fabric of the blank 10 coated with the thermoplastic resin layer in the above process is sent to a punching process and punched into the shape of the blank 10 . The punching method is a known punching method such as the Thomson punching method, the rotary die cutting method, the CAD cutting method, the laser cutting method, and the Dolsler method. The punching method is appropriately selected in consideration of production quantity, production speed, quality requirements, cost, and the like. The punched blanks 10 are piled up in the same direction and stored.

To assemble the flanged paper container 50 of the present embodiment from the blank 10, the odd-numbered side plates 12 and the even-numbered side plates 14 are folded to form a hollow container. The side 34 of the odd-numbered folding joint plate 121 (the side opposite to the odd-numbered side plates 12) and the side 44 of the even-numbered folding joint plate 141 (the side opposite to the even-numbered side plates 14). is a common side edge, and the side edges 34 and 44 of each of the folding joint plates 121 are mountain fold lines, and the vicinity of the outer edge 35 of the odd-numbered folding joint plate 121 and the even-numbered folding joint plate The inner surfaces near the outer edge 142 of the joining plate 141 are continuously heat-sealed from the side 33 of the odd-numbered side plate 12 to the side 43 of the even-numbered side plate 14 .

By doing so, in the odd-numbered folded joint plate 121 and the even-numbered folded joint plate 141 that are superimposed, the notch 123 on the outer edge side of the blank 10 of the odd-numbered folded joint plate 121 and the Contents can be prevented from leaking through the outer edges 142 of the even-numbered folding joint plates 141 .

Next, in a state where the odd-numbered folded joint plate 121 and the even-numbered folded joint plate 141 are overlapped by heat sealing, the even-numbered folded joint plate 141 is placed on the outer surface side of the even-numbered side plate 14. The even-numbered side plates 14 are bent so as to face each other. The odd-numbered edge piece upper portion 13, the even-numbered edge piece upper portion 15, and the joint edge piece 122 are each valley-folded, and the odd-numbered folded joint plate 121 and the even-numbered folded joint plate 141 are heat-sealed. are superimposed on the even-numbered side plates 14 .

Then, the upper surface of the joining edge piece 122 and the lower surface of the even-numbered edge piece upper portion 15 face each other, and the upper surface of the joining edge piece 122 and the lower surface of the even-numbered edge piece upper portion 15 are heated. Sealed. Further, by bending the odd-numbered side plates 12 and the even-numbered side plates 14 so that their sides are aligned with each other, the upper surface of the end portion 131 of the odd-numbered edge piece upper portion 13 and the above-mentioned The lower surfaces of the ends 151 of the even-numbered edge piece upper portions 15 face each other, and the upper surface of the ends 131 of the odd-numbered edge piece upper portions 13 and the lower surfaces of the ends 151 of the even-numbered edge piece upper portions 15 are heat-sealed. be done.

Further, the outer edge 36 of the odd-numbered edge piece upper portion 13 is valley-folded, and the odd-numbered edge piece folded portion 16 is folded back so that the lower surface of the odd-numbered edge piece folded portion 16 and the odd-numbered edge piece folded portion 16 are folded back. is heat-sealed with the lower surface of the edge piece upper part 13 of .

In addition, by valley-folding the outer edge 46 of the even-numbered edge piece upper portion 15 and folding back the even-numbered edge piece folded portion 17, the lower surface of the even-numbered edge piece folded portion 17 and the joint edge The lower surface of the piece 122, the lower surface of the edge portion 131 of the odd-numbered edge piece upper portion, and the lower surface of the even-numbered edge piece upper portion 15 face each other. Then, the lower surface of the even-numbered edge piece folded portion 17, the lower surface of the joint edge piece 122, the lower surface of the odd-numbered edge piece upper end portion 131, and the lower surface of the even-numbered edge piece upper portion 15 are heat-sealed. be done. By the procedure described above, the flanged paper container 50 having the flange 52 that is continuous in a circular fashion and reinforced by the folded edge portion and that has an opening on the upper surface is assembled.

It should be noted that the method for assembling the flanged paper container 50 described above has a joining step at each location. Heat sealing is desirable as a bonding method when thermoplastic resin layers are provided on both sides of the blank 10 as the layer structure of the laminate. As the heat sealing method, a method of blowing hot air to pressurize, a method of pressing a high-temperature heater bar, an ultrasonic welding method, a high-frequency welding method, a method of heating and pressurizing with infrared rays, and other known methods as appropriate. selected.

Further, the laminated body of the blank 10 may be provided with a thermoplastic resin layer on one side without providing the thermoplastic resin layer on both sides. The surface on which the thermoplastic resin layer is provided may be provided on the inner surface or the outer surface of the flanged paper container 50 . If the main aim is to prevent the content from leaking out, it may be provided on the inner surface.

When a thermoplastic resin layer is provided on one side, the bonding interface may be a combination of the paper base layer and the thermoplastic resin layer.In this case, depending on the material of the thermoplastic resin layer, it can be bonded as it is without treatment. Although there are cases, when bonding is not possible without treatment, the paper substrate layer is surface-treated or bonding is performed using an adhesive. In addition, an adhesive can be used to join the portions where the paper substrate layers are joined at the joint interfaces. If the paper container requires less sealability and contributes less to shape retention, it may be left unjoined.

If the thermoplastic resin layer is not used on both surfaces, all bonding interfaces are a combination of layers that cannot be heat-sealed. Therefore, each surface layer is subjected to surface treatment or bonding using an adhesive.

The configuration of the blank shape of the hexagonal flanged paper container and the octagonal flanged paper container and the method of assembling the paper container are the same as the case of the rectangular flanged paper container described above. is omitted.
Further, the material and manufacturing method of the blanks of the hexagonal flanged paper container and the octagonal flanged paper container are the same as those of the rectangular flanged paper container described previously, and thus the description is omitted.
Also, the method of assembling the hexagonal flanged paper container and the octagonal flanged paper container is the same as the previously described rectangular flanged paper container, so the description is omitted.

When the number of corners of the bottom plate 11 is even and the sizes of the interior angles are the same, the opposite sides of the flanged paper container 50 are parallel.
In addition, since the components (plates, sides, etc.) of the blank 10 are symmetrical in the vertical direction and the horizontal direction, the shape of the molded paper container 50 with flanges is also symmetrical, resulting in a stable appearance.

As described above, in the flanged paper container of the present invention, the flange can be reinforced by folding back the folded edge portion.
In addition, since the outer edge of the flange serves as an edge where the stack of blanks is folded back, the cross section of the blank is not exposed. As a result, liquid or the like does not permeate through the edge of the flange, so that the strength of the flanged paper container can be reduced.
Further, to provide a flange-equipped paper container with excellent sealing performance, in which the content does not leak from the through-hole of the flange when the content is filled and the lid member is sealed, because the flange does not have a through-hole. can do

The flanged paper container of the present invention is used for packaging foods such as instant noodles, udon noodles, pasta, gratin, various rice bowls, chilled foods, frozen foods, frozen desserts, and confectionery, and non-food products such as aromatics, detergents, waxes, and hair styling products. It can be applied to a flanged paper container that has an outward flange integral to the upper opening edge so that a lid can be attached.

10 Blank 11 Bottom plate 12 Odd numbered side plate 121 Odd numbered folded joint plate 122 Joint edge piece 124 Joint edge piece outer edge 13 Odd numbered edge piece top 131 Odd numbered edge piece top end 132 Odd numbered edge Incision 133 on top of piece Outer edge 14 of odd-numbered joint plate Even-numbered side plate 141 Even-numbered joint plate 142 Outer edge 15 of even-numbered joint plate Even-numbered edge piece upper part 151 Even-numbered edge piece upper part Edge 152 Outer edge 16 of the upper end of even-numbered edge piece Odd-numbered edge piece folded portion 17 Even-numbered edge piece folded portion 18 Even-numbered edge piece folded-over projection 31 Odd-numbered bottom plate side edge 32 Outer edge 33 of odd-numbered side plate Side edge 34 of odd-numbered side plate Side edge of odd-numbered folding joint plate (opposite side of odd-numbered side plate)
35 Outer edge 36 of odd-numbered fold joint plate Upper outer edge 37 of odd-numbered edge piece Side edge 38 of odd-numbered edge piece fold Outer edge 41 of odd-numbered edge edge fold Outer edge 41 of even-numbered bottom plate 42 Outer edge of even-numbered side plate 43 Side edge of even-numbered side plate 44 Side edge of even-numbered joint plate (opposite side of even-numbered side plate)
46 Outer edge 47 of upper even edge edge 48 Lateral edge of even edge cuff 48 Outer edge of even edge cuff 49 Inner edge 50 of projection of even edge cuff Flanged Paper container 51 Body 52 Flange 60 Blank 61 Bottom plate 62 First side plate 621 First folding joining plate 622 Joining edge piece 623 Sealing portion 624 Joining edge piece outer edge 625 Separation closing portion 63 First edge piece 631 First peninsular piece 632 First peninsular piece cut 633 Branched cut 64 Second side plate 641 Second folding joining plate 642 Second folding joining plate outer edge 65 Second edge piece 651 Second peninsular piece 652 Second peninsular piece outer edge 66 Protruding piece 71 Bottom plate first side 72 First side plate outer side 73 First side plate side 74 First folding joint plate side (side opposite to first side plate)
75 First folding joining plate outer edge 81 Bottom plate second side edge 82 Second side plate outer edge 83 Second side plate side edge 84 Second folding joining plate side edge (second side plate opposite side)
90 Paper container with flange 91 Body 92 Flange

A Odd-numbered side plate gathering point B Even-numbered side plate gathering point E Intersection point between the inner side of the protrusion of the even-numbered edge piece folded portion and the outer edge of the even-numbered edge piece folded portion F Odd-numbered bottom plate side Intersection point L between a side and an even-numbered bottom plate side edge L First side plate gathering point M Second side plate gathering point θE Between the inner side of the projection of the even-numbered edge piece folded portion and the outer edge of the even-numbered edge piece folded portion The angle θF formed by the angle θG of the corner of the bottom plate closest to the corner formed by the inner side of the protrusion of the even-numbered folded edge and the outer side of the even-numbered folded edge θG of the formed paper container The angle formed by the odd-numbered side plate and the odd-numbered folding joint plate in the vicinity of the flange

Claims (9)

In blanks for paper containers with flanges,
The blank includes an n-sided bottom plate having an even number of corners of 4 or more,
One of the n sides of the bottom plate is defined as the first bottom plate side, and the side of the bottom plate adjacent in one direction to the first bottom plate side is defined as the second bottom plate side. , and so on sequentially from the 3rd bottom plate side to the nth bottom plate side,
Odd-numbered side plates are connected to each of the odd-numbered sides of the bottom plate via the mountain fold line, and even-numbered side plates are connected to each of the even-numbered sides of the bottom plate via the mountain fold line. connected,
One side of odd-numbered odd-numbered joint plates having an inverted triangular shape with respect to the corners of the bottom plate is provided on each of the sides of the odd-numbered side plates located on both sides in the circumferential direction of the blank via the mountain fold lines. with sides of
One of the even-numbered even-numbered joint plates having an inverted triangular shape with respect to the corners of the bottom plate via valley fold lines on each of the sides of the even-numbered side plates located on both sides in the circumferential direction of the blank. with sides of
The other side of the odd-numbered folding joint plate arranged in the peripheral direction of the blank and the other side of the even-numbered folding joint plate arranged in the peripheral direction of the blank form a mountain fold line. having a common side such that
Each of the odd-numbered folding joint plates has a joining edge piece connected to the outer edge of the odd-numbered folding joint plate on the side of the flanged paper container via a valley fold line,
In each of the odd-numbered side plates, the outer edge of the odd-numbered side plate on the side that will become the edge of the flanged paper container is connected to the top of the odd-numbered edge piece via a valley fold line. is set up,
end portions of the odd-numbered edge piece upper portion extending from both ends of the odd-numbered edge piece upper portion in a direction along the edge of the flanged paper container,
An even-numbered edge piece upper part is connected via a valley fold line to the outer edge of the even-numbered side plate on the side of the even-numbered side plate that will be the edge of the flanged paper container,
end portions of the even-numbered edge piece upper portion extending from both ends of the even-numbered edge portion upper portion in a direction along the edge of the flanged paper container,
Each of the odd-numbered edge piece tops is provided with an odd-numbered edge fold-back portion on the outer edge of the odd-numbered edge piece top on the side that will be the edge of the flanged paper container via a valley fold line. are connected,
In each of the even-numbered edge piece upper portions, an even-numbered edge piece folded portion is attached to the outer edge of the even-numbered edge piece upper portion on the side that will be the edge of the paper container with a flange via a valley fold line. are connected ,
In the width from the inside to the outside of the blank, the width at the longitudinal center of the odd-numbered edge fold is 50% of the width at the longitudinal center of the top of the odd-numbered edge. A blank for a flanged paper container, characterized by : In the width from the inside to the outside of the blank, the width at the longitudinal center of the even-numbered edge folded portion is the same as the width at the longitudinal center of the even-numbered edge. A blank for a flanged paper container according to claim 1 , characterized in that it is 50%. In blanks for paper containers with flanges,
The blank includes an n-sided bottom plate having an even number of corners of 4 or more,
One of the n sides of the bottom plate is defined as the first bottom plate side, and the side of the bottom plate adjacent in one direction to the first bottom plate side is defined as the second bottom plate side. , and so on sequentially from the 3rd bottom plate side to the nth bottom plate side,
Odd-numbered side plates are connected to each of the odd-numbered sides of the bottom plate via the mountain fold line, and even-numbered side plates are connected to each of the even-numbered sides of the bottom plate via the mountain fold line. connected,
One side of odd-numbered odd-numbered joint plates having an inverted triangular shape with respect to the corners of the bottom plate is provided on each of the sides of the odd-numbered side plates located on both sides in the circumferential direction of the blank via the mountain fold lines. with sides of
One of the even-numbered even-numbered joint plates having an inverted triangular shape with respect to the corners of the bottom plate via valley fold lines on each of the sides of the even-numbered side plates located on both sides in the circumferential direction of the blank. with sides of
The other side of the odd-numbered folding joint plate arranged in the peripheral direction of the blank and the other side of the even-numbered folding joint plate arranged in the peripheral direction of the blank form a mountain fold line. having a common side such that
Each of the odd-numbered folding joint plates has a joining edge piece connected to the outer edge of the odd-numbered folding joint plate on the side of the flanged paper container via a valley fold line,
In each of the odd-numbered side plates, the outer edge of the odd-numbered side plate on the side that will become the edge of the flanged paper container is connected to the top of the odd-numbered edge piece via a valley fold line. is set up,
end portions of the odd-numbered edge piece upper portion extending from both ends of the odd-numbered edge piece upper portion in a direction along the edge of the flanged paper container,
An even-numbered edge piece upper part is connected via a valley fold line to the outer edge of the even-numbered side plate on the side of the even-numbered side plate that will be the edge of the flanged paper container,
end portions of the even-numbered edge piece upper portion extending from both ends of the even-numbered edge portion upper portion in a direction along the edge of the flanged paper container,
Each of the odd-numbered edge piece tops is provided with an odd-numbered edge fold-back portion on the outer edge of the odd-numbered edge piece top on the side that will be the edge of the flanged paper container via a valley fold line. are connected,
In each of the even-numbered edge piece upper portions, an even-numbered edge piece folded portion is attached to the outer edge of the even-numbered edge piece upper portion on the side that will be the edge of the paper container with a flange via a valley fold line. are connected ,
In the width from the inside to the outside of the blank, the width at the longitudinal center of the even-numbered edge fold is 50% of the width at the longitudinal center of the top of the even-numbered edge. A blank for a flanged paper container, characterized by : In blanks for paper containers with flanges,
The blank includes an n-sided bottom plate having an even number of corners of 4 or more,
One of the n sides of the bottom plate is defined as the first bottom plate side, and the side of the bottom plate adjacent in one direction to the first bottom plate side is defined as the second bottom plate side. , and so on sequentially from the 3rd bottom plate side to the nth bottom plate side,
Odd-numbered side plates are connected to each of the odd-numbered sides of the bottom plate via the mountain fold line, and even-numbered side plates are connected to each of the even-numbered sides of the bottom plate via the mountain fold line. connected,
One side of odd-numbered odd-numbered joint plates having an inverted triangular shape with respect to the corners of the bottom plate is provided on each of the sides of the odd-numbered side plates located on both sides in the circumferential direction of the blank via the mountain fold lines. with sides of
One of the even-numbered even-numbered joint plates having an inverted triangular shape with respect to the corners of the bottom plate via valley fold lines on each of the sides of the even-numbered side plates located on both sides in the circumferential direction of the blank. with sides of
The other side of the odd-numbered folding joint plate arranged in the peripheral direction of the blank and the other side of the even-numbered folding joint plate arranged in the peripheral direction of the blank form a mountain fold line. having a common side such that
Each of the odd-numbered folding joint plates has a joining edge piece connected to the outer edge of the odd-numbered folding joint plate on the side of the flanged paper container via a valley fold line,
In each of the odd-numbered side plates, the outer edge of the odd-numbered side plate on the side that will become the edge of the flanged paper container is connected to the top of the odd-numbered edge piece via a valley fold line. is set up,
end portions of the odd-numbered edge piece upper portion extending from both ends of the odd-numbered edge piece upper portion in a direction along the edge of the flanged paper container,
An even-numbered edge piece upper part is connected via a valley fold line to the outer edge of the even-numbered side plate on the side of the even-numbered side plate that will be the edge of the flanged paper container,
end portions of the even-numbered edge piece upper portion extending from both ends of the even-numbered edge portion upper portion in a direction along the edge of the flanged paper container,
Each of the odd-numbered edge piece tops is provided with an odd-numbered edge fold-back portion on the outer edge of the odd-numbered edge piece top on the side that will be the edge of the flanged paper container via a valley fold line. are connected,
In each of the even-numbered edge piece upper portions, an even-numbered edge piece folded portion is attached to the outer edge of the even-numbered edge piece upper portion on the side that will be the edge of the paper container with a flange via a valley fold line. are connected ,
Protrusions protruding outwardly of the blank extend from both ends of the even-numbered edge folded portions,
Inner sides of the projecting portion directed toward the inside of the blank from end points in the outer direction of the blank on both side sides of the even-numbered edge folded portion, and the even-numbered edge folded portion The angle θE of the corner E formed by the outer edge, which is the outer edge, and the angle θF of the corner F of the bottom plate that is closest to the corner E among the corners of the bottom plate are the same. A blank for a flanged paper container characterized by: When assembling the flanged paper container,
The even-numbered edge folded portion and/or the protrusion of the even-numbered edge folded portion
Near the joint between the top of the odd-numbered edge and the top of the even-numbered edge,
the inner end point of the blank of the cut in the upper end of the odd-numbered edge piece, the mountain fold line of the side edge of the odd-numbered side plate, and the valley fold line of the outer edge of the odd-numbered side plate. and a convergence point A of
Closing through-holes that may be caused by overlapping or approaching of the outer edges of the upper ends of the even-numbered edge pieces and the gathering point B, which is the intersection point of the outer edges of the even-numbered folding joining plates. A blank for a flanged paper container according to claim 4, characterized in that: In the width from the inside to the outside of the blank, the width at the center of the longitudinal direction of the even-numbered edge folded portion is 105% or more of the width at the center of the longitudinal direction of the upper part of the even-numbered edge. and less than or equal to 120%. A flanged paper container formed by assembling the flanged paper container blank according to any one of claims 1 to 6. Protrusions protruding outwardly of the blank extend from both ends of the even-numbered edge folded portions,
Inner sides of the projecting portion directed toward the inside of the blank from end points in the outer direction of the blank on both side sides of the even-numbered edge folded portion, and the even-numbered edge folded portion The angle θE of the corner E formed by the outer edge, which is the outer edge, and
8. The flanged paper container according to claim 7, wherein angles θG formed by the odd-numbered side plates and the odd-numbered folding joint plates are the same in the vicinity of the flange of the flanged paper container. On both side sides of the odd-numbered folded edge portion in the direction along the edge of the paper container with flange, and on the edge of the paper container with flange of the even-numbered edge folded portion opposite to the side edge 9. The flanged paper container according to claim 7 or 8, wherein the distance between both ends of the flanged paper container in the direction along the flange is 0.2 mm or more and 3 mm or less.

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