JP2012218775A - Self-standing paper container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper container having high sealing performance in a bottom face thereof and high stability when placed on a flat surface.SOLUTION: The self-standing paper container 2A includes the bottom face 30, a front face 10 and a rear face 20 respectively rising from a front side and a rear side of the bottom face 30, side face rising elements 40A, 40B respectively rising from both sides of the bottom face 30, first side-face elements 11A, 11B extending continuously from both sides of the front face 10, and second side-face elements 21A, 21B extending continuously from both sides of the rear face 20. In the right and left two side faces of the self-standing paper container 2A, the first side-face elements 11A, 11B and the second side-face elements 21A, 21B are bonded together by mutually overlapping parts thereof. The side face rising elements 40A, 40B are bonded to the second side-face elements 21A, 21B. The first side-face elements 11A, 11B are provided with projecting legs 12A, 12B projecting downward from the bottom face. The self-standing paper container 2A is supported to be upright by the projecting legs 12A, 12B.

Description

  The present invention relates to a self-supporting (or self-supporting) paper container, and more particularly to a food paper container.

  As an example, many paper containers for storing food such as french fries and other articles are formed in a cup shape with a single cardboard (blank). For example, see the following Patent Document 1.

Utility Model Registration No. 3170661

  The basic structure of the paper container (one-touch carton) described in this document consists of a rectangular (slightly oval) bottom surface, a front wall, a rear wall, and a front wall. It has left and right side wall portions that extend from both side edges and are respectively bonded to both side edges of the rear wall portion, and has a simple structure. However, since the left and right side wall portions extend only continuously from the front wall portion and are bonded to the rear wall portion, there is no connection with the bottom surface portion, and there is a gap between them. Therefore, the bottom of the container does not have a sealing property, and liquid (for example, oil) may flow down from the food stored inside.

  Therefore, in order to improve the sealing performance, as shown in FIGS. 23 and 24, the front and rear wall portions 111 and 112 provided continuously on the bottom surface portion 113 are erected (the front and rear wall portions include side portions). These side portions are bonded to each other, and side rising pieces 114 are continuously provided on both side edges of the bottom portion 113, and the side rising pieces 114 are attached to the left and right side portions of the front and rear wall portions 111 and 112, respectively. Paper containers have been devised that adhere from the outside.

  According to this structure, since the side rising piece 114 closes the gap between the left and right side portions of the front and rear wall portions 111 and 112 and the bottom surface portion 113, the sealing performance of the container bottom is enhanced. At the same time, in addition to the mutual adhesion of the front and rear wall portions 111 and 112, the side rising pieces 114 are bonded to the front and rear wall portions 111 and 112, so that the lower half of the paper container is considerably strong. Become. When the lower half of the paper container is strengthened, the bottom part tends to bend downward in a direction protruding due to the slight elasticity of the paper (see FIG. 24). As a result, the center part of the bottom surface part protrudes downward most, so that the paper container becomes unstable when placed on a flat surface, and there is a problem that it easily falls over.

  This invention improves the stability when placed on a flat surface in a paper container with a structure aiming to improve the sealing performance of the bottom of the container (in other words, increases the independence, has an independence function) The purpose is to provide a paper container.

  The present invention also provides a paper container in which the structure of the bottom surface portion or the vicinity thereof is devised to form a liquid reservoir (liquid receiving portion), and the fluid outflow prevention function is improved.

  The self-supporting paper container according to the present invention includes a bottom surface, a front surface and a back surface that rise from the front and back surfaces of the bottom surface, a side rising piece that rises from both sides of the bottom surface, and the front surface. A first side piece extending continuously from both sides of the back portion, and a second side piece extending continuously from both sides of the back portion, and the first side piece on the left and right side faces of the paper container And at least one of the first side piece and the second side piece has at least one of the back side and the front side of the paper container. Either one of them has a leg portion that projects downward from the bottom surface in the vicinity thereof, and the side surface rising piece is inside the side piece having the projecting leg portion.

  The protruding leg may be provided only on one of the first side piece and the second side piece, or the protruding leg may be provided on both. It suffices if the first side piece and the second side piece overlap each other at a part of the overlapping portion, and the side rising piece may similarly adhere to the overlapping side piece in a necessary range. The extent of the downward protrusion of the protruding leg is determined by the flat surface (mesh) on which the bottom is placed, except when a liquid reservoir is formed on the bottom and the part is used as a leg. Or may be a lattice). The side piece may go around to the front part or the back part and be bonded to a part thereof.

  According to the paper container of the present invention, at least one of the back surface and the front surface of the paper container is provided with leg portions projecting downward from the bottom surface in the vicinity thereof, and these leg portions or the leg portions and other portions of the paper container. As a result, the paper container is supported in an upright state, which increases stability. Even if the bottom surface is curved downward, the curved lower surface does not contact the flat surface and the paper container does not become unstable.

  Further, since the side rising pieces rising from both sides of the bottom portion are provided, the sealing performance at the lower portion of the paper container is secured. You may make it further improve the sealing performance in the lower part of a paper container by adhere | attaching the said side surface rising piece with the side surface piece which overlaps with the said side surface rising piece. Since this side rising piece exists inside the side piece having the protruding leg portion, it does not interfere with the protruding leg portion protruding downward from the side piece.

  If necessary, the bottom of the paper container is deformed to form a liquid reservoir recess. Since this recess is for storing a small amount of liquid (for example, food oil) coming out of the article housed inside, the liquid is prevented from leaking from the paper container to the outside. When viewed from the outside, the bottom portion protrudes downward in this hollow portion, so that this portion can be used as another leg portion.

  The paper container according to the invention is preferably formed by a single cardboard. Cardboard is not only made of vegetable fiber, but also synthetic fiber is used as a part or all of the material, and the surface (or both sides) is coated with a synthetic resin film. Etc.

It is an expanded view of the paper container in 1st Example. It is a perspective view of the paper container in 1st Example. It is a longitudinal cross-sectional view which follows the III-III line of FIG. It is the perspective view which looked at the paper container in 1st Example from the bottom face. It is a longitudinal cross-sectional view equivalent to FIG. 3 which shows a modification. FIG. 9 is a longitudinal sectional view corresponding to FIG. 3 showing still another modification. FIG. 9 is a longitudinal sectional view corresponding to FIG. 3 showing still another modification. It is an expanded view of the paper container in 2nd Example. FIG. 4 is a longitudinal sectional view of a second embodiment corresponding to FIG. 3. It is the perspective view which looked at the paper container in 2nd Example from the bottom face. It is an expanded view of the paper container in 3rd Example. It is the perspective view which looked at the paper container in 3rd Example from the bottom face. It is a front view of the paper container in 3rd Example. It is a perspective view which shows the modification and seen the paper container from the bottom face. Furthermore, it shows another modification and is a perspective view of a paper container viewed from the bottom. It is an expanded view of the paper container which shows another modification. FIG. 9 is a perspective view of the paper container as viewed from the bottom, showing the modified example. It is a front view of a paper container showing the above-mentioned modification. It is an expanded view of the paper container which shows another modification. It is a perspective view of the paper container which shows the said modification. FIG. 21 is a longitudinal sectional view taken along line XXI-XXI in FIG. It is a rear view of the paper container of the said modification. It is a perspective view of the paper container which shows a prior art example. FIG. 24 is a longitudinal sectional view of the paper container shown in FIG.

First Embodiment FIGS. 1 to 4 show a self-supporting paper container according to a first embodiment. The self-supporting paper container 2A (FIG. 2) according to this embodiment is made of a single cardboard. FIG. 1 is a development view of a cardboard (blank) 1A that forms the paper container 2A, and is a view of the inner surface of the paper container 2A. An alternate long and short dash line indicates a folding line that is valley-folded when the paper container 2A is made. Preferably, fold line processing or crease processing is performed along the one-dot chain line in order to facilitate folding. FIG. 2 shows a self-supporting paper container 2A that is completed by bending the stamped (die-cut) pattern (blank) 1A shown in FIG. 1 and bonding (gliding) necessary portions to be described later. 3 is a longitudinal sectional view taken along line III-III in FIG. 2, and FIG. 4 is a perspective view of the paper container 2A shown in FIG.

  First, in FIG. 1, the blank 1 </ b> A of the self-supporting paper container 2 </ b> A has a rectangular bottom surface portion 30. The front surface portion 10 and the rear surface portion 20 continuously extend in opposite directions from a boundary (a fold line indicated by an alternate long and short dash line) where the front surface and the rear surface (front surface, back surface) correspond to each other. The width of the front portion 10 and the rear portion 20 increases as the distance from the bottom portion 30 increases (the front portion 10 has a greater extent of spread), and the upper portion is greatly opened when formed on the paper container 2A. To open. A dent is formed at the upper end of the front part 10, and the upper end of the rear part 20 describes an arc projecting upward.

  First side pieces 11 </ b> A and 11 </ b> B are continuously formed from the front part 10 on both the left and right sides of the front part 10. The width of these side pieces 11A and 11B is the widest at the portion corresponding to the lower portion of the paper container, and becomes narrower toward the upper portion. The width of the lowermost portion of the side pieces 11A and 11B is approximately the same as or slightly smaller than the width of the bottom surface portion 30 (length in the front-rear direction or depth). Protruding legs 12A and 12B are provided at the lowermost portions of the side pieces 11A and 11B (indicated by hatching with two-dot chain lines). The projecting legs 12A and 12B have a higher height (the width is larger) as they extend outward from the side pieces 11A and 11B.

  Second side pieces 21 </ b> A and 21 </ b> B are continuously formed on the left and right sides of the back part 20 from the back part 20. The widths of these second side pieces 21A and 21B are substantially the same in the vertical direction of the paper container. The upper ends of the second side pieces 21A and 21B are formed in an arc projecting upward.

  Side rising pieces 40A and 40B extend integrally from the boundary between the side surfaces of the bottom portion 30. Since the side rising pieces 40A and 40B are for enhancing the sealing performance of the bottom of the paper container, it is sufficient that the side rising pieces 40A and 40B cover only the bottom of the paper container. The side rising pieces 40A and 40B are separated from the first and second side pieces 11A, 11B, 21A and 21B, and the upper ends of the side rising pieces 40A and 40B are projected most.

  The shape, width, height, and the like of the bottom surface portion 30, the front surface portion 10, the rear surface portion 20, the first side surface pieces 11A and 11B, the second side surface pieces 21A and 21B, and the side surface rising pieces 40A and 40B are as follows. Depending on the desired design. For example, the bottom surface portion 30 can have a shape close to an ellipse, the front surface portion, the back surface portion, the side piece, the side rising piece can be deformed accordingly, and the width, height, etc. can be changed. is there.

  The cardboard (blank) 1A die-cut (die-cut) as described above is bent along its fold line (dashed line), and a desired portion is adhered, and the self-supporting shape shown in FIGS. A paper container 2A is created.

  That is, the first side pieces 11A and 11B are bent at a substantially right angle with respect to the front portion 10, and the second side pieces 21A and 21B are similarly bent at a substantially right angle with respect to the back portion 20. The front surface portion 10 and the back surface portion 20 are erected substantially perpendicular to the bottom surface portion 30. Further, the side rising pieces 40A and 40B are also erected almost at right angles to the bottom surface portion 30. In this embodiment, the first side pieces 11A and 11B are located on the outermost side, the second side pieces 21A and 21B are placed inside thereof, and the side rising pieces 40A and 40B are inside the second side pieces 21A and 21B. Located in. The outer surfaces of the side rising pieces 40A and 40B are bonded (glued) to the inner surfaces of the second side pieces 21A and 21B, respectively, and the outer surfaces of the second side pieces 21A and 21B are attached to the inner surfaces of the first side pieces 11A and 11B. Each is glued. Adhesion is sufficient with only a part of the portion where these pieces overlap.

  In this state where the self-supporting paper container 2A is assembled, the projecting leg portions 12A and 12B provided at the lower ends of the first side pieces 11A and 11B project below the bottom surface portion 30. Therefore, when the paper container 2A is placed on a flat surface (P in FIG. 3), the paper container 2A has a lower edge of the front part 10 (boundary between the front part 10 and the bottom part 30) and a protruding leg part. At the lower end edges of 12A and 12B (shown by thick lines in FIG. 4), they contact the flat surface P. Therefore, even if the bottom surface portion 30 is curved and its central portion protrudes downward, the protruding bottom surface portion 30 does not contact the flat surface P, so the paper container 2A is stable and does not fall easily. The protruding amounts of the protruding legs 12A and 12B may be determined in consideration of the expected degree of curvature of the bottom surface 30 and the overall stability of the paper container 2A. The length of the projecting leg portions 12A and 12B is preferably the same as the width of the bottom surface portion 30 (the gap between the front surface portion 10 and the back surface portion 20), but may be longer or shorter than the width of the bottom surface portion 30. (It may be more than half of the width of the bottom surface 30).

  Further, the side rising pieces 40A and 40B are continuously provided on the bottom surface portion 30, and the side rising pieces 40A and 40B are bonded along the inside of the side surface portion formed by the side surface pieces 11A, 11B, 21A and 21B. Therefore, the sealing property at the lower part of the paper container is secured.

  Although the assembly (folding and bonding) of the paper container described above can be performed manually, it goes without saying that it can be performed mechanically as usual.

  The side rising pieces 40A and 40B are continuously provided on the bottom surface portion 30 and are bent at a substantially right angle with respect to the bottom surface portion 30, so that they are directed toward the second side surface pieces 21A and 21B by the elasticity (repulsive force) of the paper. Is energized. Therefore, the sealing property at the lower part of the paper container can be ensured without adhering the side rising pieces 40A and 40B to the side surface portions (second side surface pieces 21A and 21B). Of course, in order to ensure the sealing performance at the lower part of the paper container, the side rising pieces 40A and 40B may be bonded to the side surface as described above. This also applies to the following modified examples and other embodiments.

  FIG. 5 shows a modification. In this modification, the side rising piece 40B (40A) is sandwiched between the first side piece 11B (11A) and the second side piece 21B (21A), and the both side pieces are placed on both sides thereof. It is glued. Of course, in other parts, the first side piece 11B (11A) and the second side piece 21B (21A) are also bonded to each other.

  FIG. 6 shows still another modification. Here, the side rising piece 40B (40A) is located on the innermost side, the second side piece 21B (21A) is located on the outermost side, and the first side piece 11B (11A) is provided on these side rising pieces 40B ( 40A) and the second side piece 21B (21A), and the protruding leg 12B (12A) protrudes below the bottom face 30. Needless to say, each piece is bonded to at least a part of the overlapping portion.

  Thus, if the side rising pieces 40A and 40B are inside the first side pieces 11A and 11B having the protruding legs 12A and 12B, the protruding legs 12A and 12B protrude below the bottom face 30. It is possible. Protruding legs can be provided at the lower ends of the second side pieces 21A and 21B, and protruding legs (first embodiment) are provided on both the first and second side pieces as in the following embodiment. It is also possible to provide a long and substantially triangular shape. Further, in the left and right side portions of the paper container, the overlapping order of the side rising pieces 40A, 40B, the first side pieces 11A, 11B, and the second side pieces 21A, 21B may be different. For example, the left side surface portion of the paper container may overlap in the order shown in FIG. 3, and the right side surface portion may overlap in the order shown in FIG. 5 or FIG. The above-described modification also applies to other embodiments described later and modifications thereof.

  FIG. 7 shows still another modification. Here, the lower end of the protruding leg 12B is cut out in an arc shape (indicated by reference numeral 12b) (the same applies to the left protruding leg 12A). By adopting such a shape, the protruding leg 12B (12A) comes into contact with the flat surface P only at the front end on the back surface 20 side, and even if the flat surface P has some unevenness, the paper container Stability is not easily lost.

Second Embodiment FIGS. 8 to 10 show a second embodiment. In these drawings, the same components as those shown in the first embodiment are designated by the same reference numerals to avoid redundant description. Only differences from the self-supporting paper container of the first embodiment will be described.

  The second embodiment differs from the first embodiment in two respects. The first is that, in the assembled state, a total of four projecting leg portions are provided in the vicinity of the four corners of the bottom surface portion 30, respectively. Secondly, a liquid reservoir (liquid receiving part) is positively formed on the bottom face part 30. Thereby, when food is stored in the paper container, it is possible to sufficiently prevent the liquid such as oil coming out of the food from leaking from the paper container.

  Explaining the first point, in the developed view of the paper container blank 1B (FIG. 8), it is downward when the paper container is assembled at the outermost part of the first side piece 11A, 11B which is the lower part of the paper container. Protruding leg portions 13A and 13B projecting from each other are integrally provided. Similarly, projecting legs 23A and 23B are integrally formed on the second side pieces 21A and 21B. When the paper container 2B is assembled, the protruding legs 13A, 13B, 23A, and 23B protrude downward from the four corners of the bottom surface 30, and the paper container 2B stands on the flat surface P by the four legs. (Figs. 9 and 10).

  The second point will be described. In the developed view (FIG. 8), as indicated by reference numerals 31 and 41 in particular, the arc-shaped crease 31 is formed at the boundary between the bottom surface 30 and the side rising pieces 40A and 40B. 41 is formed. The crease 31 on the side of the bottom face 30 draws an arc that protrudes inward of the bottom face 30, and the crease 41 on the side of the side rising pieces 40A, 40B protrudes in the direction of the tip of the side rising pieces 40A, 40B. It draws an arc. Since these creases 31 and 41 are folded into valley folds (as viewed from the inner surface of the paper container) when the paper container 2A is assembled, the bottom surface 30 is centered as shown in the longitudinal section of FIG. An arc is formed so that the portion protrudes downward most (an arc when viewed in the front-rear direction), and a recess is formed. This dent is a liquid reservoir (liquid receiving part). The side rising pieces 40A, 40B and the bottom surface portion 30 are continuous through oblique portions 31A, 31B surrounded by the creases 31, 41.

  As described above, the bottom surface portion 30 is curved downward and a liquid pool is formed, but the projecting leg portions 13A, 13B, 23A, and 23B project downward from the lowest portion of the bottom surface portion 30. The bottom surface 30 does not come into contact with the flat surface P, and the paper container 2B is stably supported by the four projecting legs 13A, 13B, 23A, and 23B.

Third Embodiment FIGS. 11 to 13 show a third embodiment. A feature of the third embodiment is that the bottom portion protrudes downward in order to form a liquid reservoir, and the paper container is self-supporting at the bottom portion (the deepest portion of the liquid reservoir) protruding downward. It is used as a leg.

  In the developed view shown in FIG. 11, two creases 14 are put in the front portion 10, and portions 10A and 10B are provided between the first side pieces 11A and 11B and the front portion 10, and the first side face is provided. The pieces 11A and 11B and the front portion 10 are smoothly bent or bent (in FIG. 12, the front portion 10 and the portions 10A and 10B are drawn on a plane, but these front portions 10, the portions 10A and 10B may be curved).

  A horizontal crease 32E is placed at the bottom of the front portion 10. In addition, the bottom portion has four folding lines 32A, 32B, 32C, so that the bottom portion can protrude downward in the shape of a quadrangular pyramid, with the point C on the slightly left and right front (front side) as the apex. 32D is formed from point C toward the four corners of the bottom surface. A crease at the boundary between the bottom surface portion and the side rising pieces 40A and 40B is denoted by reference numeral 42, and a crease at the boundary between the bottom surface portion and the back surface portion 20 is denoted by reference numeral 23. The portions of the bottom face surrounded by the creases 32A to 32E, 42, 23 are denoted by reference numerals 30A, 30B, 30C, 30D. The portions 30A, 30B, and 30C are substantially flat, but the portion 30D is curved in a direction protruding outward from the front toward the bottom.

  The back portion 20 is also provided with portions 20A and 20B so as to be smoothly bent between the second side pieces 21A and 21B by the crease 22.

  The projecting leg portions 12A and 12B projecting downward are the same as those shown in the first embodiment.

  The self-supporting paper container shown in FIGS. 12 and 13 is formed by bending the blank 1C shown in this development view (FIG. 11) along the above-mentioned creases and adhering necessary portions in the same manner as in the first embodiment. 2C is completed. In the inside of the paper container 2C, a quadrangular pyramid-shaped depression (liquid reservoir) that is deepest at the apex C is formed on the bottom surface. When viewed from the outside of the paper container 2C, the vertex C protrudes downward most and becomes a leg portion that supports the paper container 2C. Parts on the back side of the projecting legs 12A and 12B (indicated by A and B in FIG. 12) also support the paper container 2C. That is, when the paper container is erected on the flat surface P, the paper container is self-supporting at three points A, B, and C, and stands in the most stable form.

  FIG. 14 shows a modification. Another crease 32F is formed at the center of the bottom surface portion 30D shown in FIG. Contrary to the other creases, this crease 32F is a mountain fold when viewed from the inside of the paper container (a valley fold when viewed from the outside), and the portion 30D is divided into two portions 30Da and 30Db. When viewed from the outside, the shape is slightly dented along the crease 32F, and it is possible to bend the blank without difficulty. Also in this modified example, the self-supporting paper container 2D is supported at three points by points A, B, and C.

  FIG. 15 shows yet another modified self-supporting paper container 2E. Instead of one crease 32F, the bottom fold 30D (FIG. 12) has two creases 32G and 32H slightly apart from each other. Is formed. The creases 32G and 32H are also mountain folds when viewed from the inside of the paper container 2E, and valley folds when viewed from the outside, and the portions of the creases 32G and 32H are slightly recessed when viewed from the outside. Two creases between the front portion 10 and the first side pieces 11A and 11B are inserted so as to connect the upper end of the front portion 10 and the center of the first side pieces 11A and 11B in the height direction. Yes. Other configurations are the same as those of the modification shown in FIG. 14 described above.

  16 to 18 show still another modification.

  Referring to the development view of FIG. 16, a crease 33 </ b> C indicating the boundary between the front face 10 and the bottom face 30 is formed in the bottom face 30 so as to slightly enter the bottom face 30. The crease 33C has a shape in which the crease portions 33Ca and 33Cb extending obliquely from the lower left end and the lower right end of the front portion 10 toward the bottom face portion 30 are connected by straight lines (parallel to the crease 25). On the bottom surface 30, creases 33 </ b> A and 33 </ b> B are formed obliquely from both ends of the crease 33 </ b> C toward both ends of the crease 25. In the front part 10, two creases 13A and 13B extend partway from both ends of the crease 33C toward the upper end of the front part 10.

  When such a blank 1G is bent and bonded and assembled, a paper container 2G as shown in FIGS. 17 and 18 is obtained. The lower portion of the front portion 10 indicated by reference numeral 10C is curved and continues to the bottom portion 30, and the bottom portion 30 is inclined slightly downward toward the front and is lowest at the position of the crease 33C.

  Therefore, in the paper container 2G, a deepest recess (liquid reservoir) is formed at the crease 33C slightly forward of the bottom surface. The paper container 2G is supported by the creases 33C and the portions A and B of the projecting legs 12A and 12B, and becomes stable and independent (indicated by thick lines and black circles).

  19 to 22 show still another modification. In this modification, as shown in FIG. 19, the crease formed at the boundary between the back surface portion 20 and the bottom surface portion 30 is slightly in the direction from the back surface portion 20 to the bottom surface portion 30 as indicated by reference numerals 34A and 34B. It is formed in an intrusive shape. A position (the intersection of the two straight creases 34A and 34B) that enters the bottom surface 30 most side is defined as a point E. Further, the projecting leg portions 26A and 26B are formed at the lower ends of the second side surface pieces 21A and 21B formed integrally on both sides of the back surface portion 20, respectively.

  When the blank 1H shown in FIG. 19 is assembled, the paper container 2H shown in FIGS. 20 to 22 is completed. The bottom surface portion 30 is lowest at the point E, where a depression (liquid reservoir) is formed. Since the portions A and B projecting to the lowermost side of the projecting leg portions 26A and 26B are located at the lower ends on both sides on the front side, the bottom surface portion 30 is highest on the front side. As best shown in FIG. 21, the paper container 2H is self-supporting by supporting the three points A, B, and E in a slightly inclined form on the back side.

  Also in the third embodiment, it is possible to use protruding leg portions that protrude only in part as shown in the second embodiment (FIGS. 8 to 10). In the above embodiment, the bottom surface portion is substantially rectangular, but various modifications are conceivable, such as rounding the corners or making the shape close to an ellipse.

1A, 1B, 1C, 1G, 1H Blank 2A, 2B, 2C, 2D, 2E, 2G, 2H Free-standing paper container
10 Front
11A, 11B first side piece
12A, 12B, 13A, 13B, 23A, 23B, 26A, 26B Projecting leg
20 Rear side
21A, 21B Second side piece
30 Bottom
40A, 40B Side rising piece

Claims (6)

The bottom of the paper container;
A front part and a rear part, each of which rises from the front and back of the bottom part,
Side rising pieces that rise from both sides of the bottom portion,
A first side piece extending continuously from both sides of the front portion;
A second side piece extending continuously from both sides of the back portion,
The first side piece and the second side piece are bonded to each other on both the left and right side surfaces of the paper container,
At least one of the first side piece and the second side piece is a leg portion that protrudes below the bottom surface in the vicinity of at least one of the rear side and the front side of the paper container. Have
The side rising piece is inside the side piece having the protruding leg,
Self-supporting paper container.   2. The self-supporting paper container according to claim 1, wherein the protruding leg portion is provided only on one of the first side piece and the second side piece.   The self-supporting paper container according to claim 1, wherein the projecting legs are provided on both the first side piece and the second side piece.   4. The liquid reservoir indentation is formed on the bottom surface portion by deformation of cardboard at the bottom of the paper container including the bottom surface portion, and the projecting leg portion projects downward from the bottom of the indentation. A self-supporting paper container according to claim 1.   The protruding leg is provided on one side of the front or back side, and on the other side, a cardboard at the bottom of the paper container including the bottom is formed so as to form a recess for a liquid reservoir on the bottom side. The self-supporting paper container according to claim 1, wherein the paper container is deformed and protrudes downward, and the paper container is supported by the protruding leg portion and the downward protruding portion by the liquid reservoir.   The self-supporting paper container according to any one of claims 1 to 5, wherein the self-supporting paper container is made by die-cutting, bending, and bonding a piece of cardboard.

Images