JP2017109763A - Paper-made container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper-made container which prevents leakage of a housed article from a housing part by a simple structure and shows increased taking-out performance of the housed article.SOLUTION: A paper-made container comprises: a pair of first side face parts 21, 22 which are extended in a raised state on opposing outer peripheral sides 20a, 20b of a bottom face part 20, are formed to be longer in a width direction than the outer peripheral sides 20a, 20b, and are bonded to overlap end parts 21b, 22b with each other by flexibly bending in the width direction; and a pair of second side face parts 23, 24 which are extended in a raised state on opposing outer peripheral sides 20c, 20d of the bottom face part 20, are formed to be shorter in the width direction than the outer peripheral sides 20c, 20d, and are bonded to outer side faces of the pair of the first side faces 21, 22 in a manner that a triangular connecting piece 25 continuously provided to connect between the pair of the first side face parts 21, 22 is overlapped. An opening part of a housing part 10 is formed into a curved cross-sectional shape in which the pair of the first side face parts 21, 22 continue.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a paper container technology, and more specifically, the upper opening is accommodated in a plurality of side surfaces formed from one foldable blank and inclined outward in the outer periphery of the bottom surface. The present invention relates to a paper container in which a portion is formed.

  Conventionally, as a paper container used as a cup or case for food or confectionery, it is formed from a single foldable blank and is opened upward at a plurality of laterally inclined side portions provided on the outer periphery of the bottom surface portion. The structure of the paper container in which the storage part is formed is known. As a paper container, a so-called cup-shaped container is formed with a cylindrical side surface portion in which a plate-shaped side plate is inclined outward, and a disc-shaped bottom surface portion is disposed at the lower end of the side surface portion. A configuration having an accommodating portion with an upper opening is also known. However, the paper container formed from one blank has a smaller number of parts compared to the case where the bottom surface and the side surface are assembled by separate members as in the cup-shaped container described above. Suitable for continuous production.

  As this type of conventional paper container, for example, as disclosed in Patent Document 1 to Patent Document 3, four side surface portions are extended from the outer periphery of the bottom surface portion, A configuration is known in which the connecting pieces that are continuously provided apart from each other are bonded to the outer peripheral surface of the side surface portion in a folded state. In such a paper container, the adjoining side surface portion is connected by bonding a connecting piece to the outer side surface of the side surface portion, so that an object stored in the storage portion is prevented from leaking from the gap between the side surface portions. It is something that can be done.

  However, the conventional paper container described above is different from a cup-shaped container in which the opening of the housing portion is continuously formed in a curved cross section, and the opening is formed continuously in a square cross section. When the object is filled and accommodated in the accommodating part as a container for ice cream or muffin cake, the corner part of the accommodating part becomes annoying when the object is taken out, and the left part of the object is left behind There was a problem that it was inferior in the removal property of the object to be contained. Thus, in recent years, there is a long-awaited provision of a paper container having a shape that has both functionality and convenience according to the type and purpose of use of the items to be stored.

JP 2000-33934 A JP 2003-40244 A JP 2005-254520 A

  Therefore, the present invention relates to a paper container, which solves the above-described conventional problems, and prevents the leakage of the object to be stored from the storage unit with a simple configuration and improves the take-out property of the object to be stored. The purpose is to provide a container.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, the paper container is formed from a single foldable blank, and the upper opening accommodating portion is formed by a plurality of side surfaces inclined outward in the outer periphery of the bottom surface portion. In the above, a pair of the bottom surface portions are extended in a standing state, are longer in the width direction than the outer periphery, are bent in the width direction, and are bonded so that the end portions overlap each other. The first side surface portion and the outer periphery facing the bottom surface portion are extended in a rising state, are shorter in the width direction than the outer periphery, and are connected so as to connect the pair of first side surface portions to each other. A pair of second side surfaces bonded to the outer surfaces of the pair of first side surfaces in a state where the triangular connecting pieces provided are overlapped, and the opening of the accommodating portion is the Shaped into a curved cross section that is continuous at the pair of first side surfaces It is intended to be.

  According to a second aspect of the present invention, the pair of second side surfaces are formed such that the edges in the extending direction are formed in a concave arc shape, are bent in the width direction, and are bonded to the outer surfaces of the pair of first side surfaces. Is.

  According to a third aspect of the present invention, the bottom surface portion is formed in a convex arc shape in which the outer periphery protrudes outward.

  According to a fourth aspect of the present invention, the bottom surface portion is in contact with the installation surface at a corner portion where the flat surface portion is inflated in an arch shape in the direction of the housing portion and the outer periphery intersects.

  As an effect of the present invention, leakage of the object to be stored from the storage part can be prevented with a simple configuration, and the take-out property of the object to be stored can be improved.

It is the perspective view which showed the whole structure of the paper container which concerns on one Example of this invention. It is a front view of the paper container of FIG. It is a top view of the paper container of FIG. 1 similarly. It is a top view of the blank which comprises a paper container. It is a block diagram which shows the principal part of the manufacturing apparatus of a paper container. It is a top view of the blank of the state by which the adhesive agent was apply | coated with the manufacturing apparatus of FIG. It is a top view of the blank which comprises the paper container of another Example.

  Next, modes for carrying out the invention will be described.

First, the structure of the paper container 1 of the present embodiment will be described below.
As shown in FIGS. 1 to 3, the paper container 1 of the present embodiment is configured as a paper container used as a cup or case for food or confectionery. The outer periphery 20a of the bottom surface portion 20 is formed from one foldable blank 2 provided with a pair of first side surface portions 21 and 22, a pair of second side surface portions 23 and 24, a connecting piece 25, and the like. A housing portion 10 having an upper opening is formed by side portions 21, 22, 23, and 24 inclined to the outer side provided at ˜20 d.

  The blank 2 is a plate that can be bent and bent and cut into a predetermined shape by punching with a punching die. For example, cup paper, card paper, coated cardboard, core base paper, synthetic pulp (resin fiber) ) Mixed paper and other papers having a practically usable strength are used. Moreover, as a plate-shaped body, what laminated | stacked the film etc. which have water resistance, oil resistance, or heat resistance on the surface as needed may be used.

  As shown in FIG. 4, the blank 2 of the present embodiment includes a bottom surface portion 20 having four outer peripheries 20 a to 20 d in the center and a pair of first outer portions 20 a and 20 b that are opposed to the bottom surface portion 20. One side surface portions 21 and 22, a pair of second side surface portions 23 and 24 extended to the outer peripheries 20c and 20d facing the bottom surface portion 20, and a pair of adjacent first side surface portions 21 and 22 and a second side surface Triangular connecting pieces 25, 25, 25, 25, etc., which are connected so as to connect the portions 23, 24, are provided.

  The bottom surface portion 20 is formed in a rectangular shape having the same length in the width direction, and the outer peripheries 20 a to 20 d are provided in a convex arc shape that protrudes outward from the center of the bottom surface portion 20. The first crease lines 21a and 22a and the second crease lines 23a and 24a are engraved along the shape on the outer peripheries 20a to 20d, and a pushing line for crease line engraving is pressed when the blank 2 is cut. Thus, the first fold lines 21a and 22a and the second fold lines 23a and 24a are provided.

  The first side surface portions 21 and 22 are extended in series to the outer peripheries 20a and 20b facing the bottom surface portion 20 via the first fold lines 21a and 22a, respectively, and are wider than the outer peripheries 20a and 20b (FIG. 4). In the left-right direction), and is formed so as to widen from the bottom surface portion 20 in the extending direction (vertical direction in FIG. 4). The first side surface portions 21 and 22 of the present embodiment have the same width direction length W1 of the first side surface portion 21 and the width direction length W2 of the first side surface portion 22 (W1 = W2). The protrusion direction length L1 and the protrusion direction length L2 of the first side surface portion 22 are equal (L1 = L2).

  The first side surface portions 21 and 22 have end portions 21b and 22b extending in the width direction, and the first side surface portions 21 and 22 are bent in a rising state as will be described later. The corresponding end portions 21b and 22b are overlapped and bonded so that the end portions 22b of the 22 are located on the accommodating portion 10 side. In this embodiment, the end portion 21b of the first side surface portion 21 and the end portion 22b of the first side surface portion 22 are different in shape, and are positioned outward from the edge portion 22b of the first side surface portion 22. The edge portion 21b of the first side surface portion 21 is formed so as to have a larger area. Moreover, the edge parts 21c and 22c of the extending direction are formed in convex arc shape in the 1st side parts 21 and 22, and the opening part of the accommodating part 10 is formed in the edge parts 21c and 22c (FIG. 1 etc.).

  The second side surface portions 23, 24 extend in series to the outer peripheries 20c, 20d facing the bottom surface portion 20 via the second fold lines 23a, 24a, respectively, and are wider than the outer peripheries 20a, 20b (FIG. 4). Are formed so as to be narrower from the bottom surface portion 20 toward the extending direction (left-right direction in FIG. 4). The second side surface portions 23 and 24 of the present embodiment have the same width direction length W3 of the second side surface portion 23 and the width direction length W4 of the second side surface portion 24 (W3 = W4). The protrusion direction length L3 and the protrusion direction length L4 of the second side surface portion 24 are formed to be equal (L3 = L4). Moreover, as for the 2nd side part 23 * 24, the edge parts 23c * 24c of the extension direction are formed in the concave circular arc shape.

  In addition, if the magnitude | size of the 1st side surface part 21 * 22 and the 2nd side surface part 23 * 24 is contrasted, the width direction length is larger in the 1st side surface part 21 * 22 (W1 * W2> W3 * W4), The length in the protruding direction is also formed so that the first side surface portions 21 and 22 are larger (L1 · L2> L3 · L4).

  The connecting piece 25 is connected via the third fold lines 25a and 25b so as to connect the pair of adjacent first side surface portions 21 and 22 and second side surface portions 23 and 24, and one vertex is described later. The bottom surface 20 is formed in a triangular shape so as to be positioned at the corner 20e (see FIG. 1 and the like). The third crease lines 25a and 25b are engraved by pressing the crease line engraving lines when the blank 2 is cut in the same manner as the first crease lines 21a and 22a and the second crease lines 23a and 24a. Preferably, the weakening process is performed on one or both of the third fold lines 25a and 25b.

  As shown in FIG. 1 to FIG. 3, the paper container 1 formed using the blank 2 described above has a bottom surface portion 20 having a planar view angle shape, and a flat surface portion of the bottom surface portion 20 in the direction of the accommodating portion 10. It is inflated into an arch shape and can be brought into contact with the installation surface at the corner portions 20e, 20e,... Where the outer peripheries 20a to 20d intersect (see FIGS. 1 and 2). In such a state, the bottom surface portion 20 is disposed so that the plane portion can be elastically bent in the vertical direction, and is elastically held in a state of being inflated in an arch shape.

  The first side surfaces 21 and 22 are bent upward along the first fold lines 21a and 22a, and are extended to the outer peripheries 20a and 20b of the bottom surface portion 20 in a rising state. The corresponding end portion 21b of the first side surface portion 21 is overlapped and bonded so that the end portion 22b of the first side surface portion 22 is positioned on the accommodating portion 10 side. The second side surface portions 23 and 24 are bent upward along the second fold lines 23a and 24a, and are extended to the outer peripheries 20c and 20d of the bottom surface portion 20 in a rising state. In the state where the connecting pieces 25 bent at the third fold line 25a and mountain-folded at the third fold line 25b are overlapped, they are bonded to the outer side surfaces of the first side surface portions 21 and 22. Has been.

  The paper container 1 of the present embodiment has a substantially inverted trapezoidal shape in a side view, the bottom surface portion 20 has a square shape (square shape) in a plan view, and the opening portion of the storage portion 10 has a substantially circular shape (curved cross section). ). Specifically, the paper container 1 has an outer peripheral surface (and an inner peripheral surface of the housing portion 10) formed by the first side surface portions 21 and 22 and the second side surface portions 23 and 24, and the first side surface portions 21 and 22 Since the one side surface portions 21 and 22 and the second side surface portions 23 and 24 are inclined and extended in the outer direction, the housing portion 10 is formed so as to have a diameter that increases toward the opening portion.

  In addition, the paper container 1 of the present embodiment is formed in a curved cross-sectional shape in which the opening of the storage portion 10 is continuous with the pair of first side surface portions 21 and 22, and the inner peripheral surface and the outer periphery of the storage portion 10. The surface is formed in the curved cross-section shape which continued in each side part 21-24 and the connection piece 25 (refer FIG.2 and FIG.3). The side portions 21 to 24 are bonded at the bonding portion between the end portion 21 b of the first side surface portion 21 and the end portion 22 b of the first side surface portion 22 and at the bonding portion between the first side surface portions 21 and 22 and the second side surface portions 23 and 24. The above-described shape in which the surface of the paper container 1 is smoothly continued is held by being bent and bonded into an arc having the same curvature.

Next, the manufacturing method of the paper container 1 of the present embodiment will be described below.
As shown in FIG. 5, the paper container 1 of the present embodiment is manufactured by using a manufacturing apparatus 3 that continuously bends and forms the above-described paper container 1 having a predetermined shape. As the manufacturing apparatus 3, a known configuration can be adopted. As an example, the manufacturing apparatus 3 shown in FIG. 5 includes a transport apparatus 30, a supply apparatus 31, an adhesive application apparatus 32, and a molding apparatus 33. Etc.

  The conveyance device 30 is laid along the horizontal direction at the upper position of the device, and a blank 2 discharged from a supply device 31 to be described later is moved downstream of the conveyance path by rotating an endless chain (not shown). To the side (left side in FIG. 5). The supply device 31 is disposed at the uppermost position of the conveyance path at the upper position of the device, and one blank 2 is sequentially supplied to the conveyance device 30 from a blank laminated body in which a plurality of blanks 2 are laminated.

  The adhesive application device 32 is disposed in the middle of the conveying device 30 at a position above the device, and the adhesive 26 is applied to a predetermined portion of the blank 2 conveyed by the conveying device 30. In the adhesive application device 32 of the present embodiment, as shown in FIG. 6, it is the surface of the blank 2, and the separation between the end portions 22 b and 22 b of the first side surface portion 22 and the first side surface portion 21 and the connecting piece 25. The adhesive 26 is applied on the third fold line 25a formed on the second fold line 25a and on the third fold line 25a formed on the second side surface portion 22 and the connecting piece 25, respectively.

  The molding device 33 is located at the side of the device and is disposed at the end of the transport device 30 and is disposed so as to be movable back and forth in the horizontal direction. The male member 34 is disposed in the inner space in the horizontal direction. The female member 35 is inserted further, and a stopper member 36 and the like that temporarily support the blank 2 conveyed by the conveying device 30 in a vertical state.

  The male member 34 can be moved back and forth in the horizontal direction (left and right direction in FIG. 5) by a drive mechanism (not shown). Specifically, in the main body portion formed in a substantially truncated pyramid shape, the bottom surface portion of the blank 2 20, and a tapered surface 34 b that is in contact with the first side surfaces 21 and 22, and the blank 2 that is supported in a vertical state by the stopper member 36 is pushed. Then, it is inserted into the internal space of the female mold member 35 to be described later. The male member 34 of this embodiment is provided with a suction member (not shown) on the contact surface 34a, and holds the bottom surface portion 20 of the blank 2 by suction on the contact surface 34a. The bottom surface 20 is sucked in the retreating direction when retreating, so that the flat surface of the bottom surface 20 can be surely inflated in the direction of the housing 10 in an arch shape.

  The female member 35 is configured such that a plurality of elongated plate-shaped adjustment portions 35 a, 35 a,... Are arranged in the circumferential direction to have a cylindrical internal space, and the opening of the internal space is the male member 34. Arranged along the advancing / retreating direction. When the male member 34 is inserted into the internal space of the female member 35, the blank 2 is brought into contact with the adjusting portions 35a, 35a, so that each side surface along the tapered surface 34b of the male member 34 is provided. The parts 21 to 24 are bent to form the paper container 1 having a predetermined shape. It is possible to adjust the arrangement of the adjusting portions 35a, 35a,... Relative to the internal space of the female member 35, and the female member 35 can be appropriately changed according to the shape of the target paper container 1.

  Here, when the manufacturing method of the paper container 1 using the manufacturing apparatus 3 is demonstrated, when the blank 2 of one sheet is supplied to the conveying apparatus 30 from the supply apparatus 31, the blank 2 will be a conveyance path | route in the conveying apparatus 30. The adhesive 26 is applied to a predetermined portion of the blank 2 by the adhesive application device 32 that is horizontally conveyed to the downstream side and disposed in the middle (see FIG. 6). And the blank 2 conveyed to the shaping | molding apparatus 33 in the edge part position of the conveying apparatus 30 is the state vertically supported by the stopper member 36, and the male member 34 is moved horizontally, and with the male member 34 It is inserted into the internal space of the female mold member 35.

  The blank 2 is bent in the process of inserting the male member 34 into the female member 35, and specifically, while the pair of first side surface portions 21 and 22 are bent at the first fold lines 21a and 22a. The end portions 21b and 22b are overlapped and bonded so that the edge portions 21c and 22c in the extending direction are flush with each other and have a continuous curved cross-sectional shape. The side surfaces 23 and 24 are bent in the width direction while being bent at the second fold lines 23a and 24a, and the connecting pieces 25 bent at the third fold lines 25a and 25b are overlapped with each other. The paper container 1 having a predetermined shape is formed by being adhered to the outer surfaces of the portions 21 and 22.

  The paper container 1 formed by the forming apparatus 33 remains in the internal space of the female member 35 even if the male member 34 is retracted from the female member 35, and is sequentially formed. Is held in an overlapping state in the internal space of the female member 35.

  As described above, the paper container 1 according to the present embodiment is formed from one foldable blank 2 and is provided with the outer side surfaces 20 a to 20 d of the bottom surface portion 20 and is inclined in the outward direction. In the paper container 1 in which the housing portion 10 having the upper opening is formed at 23 and 24, the paper container 1 is extended in a standing state on the outer peripheries 20a and 20b facing the bottom surface 20, and in a width direction from the outer peripheries 20a and 20b. A pair of first side surface portions 21 and 22 which are formed long and bent in the width direction and are bonded so that the end portions 21b and 22b overlap each other, and the outer peripheral surfaces 20c and 20d facing the bottom surface portion 20 are raised. The triangular connecting pieces 25 that are extended in the width direction and formed shorter in the width direction than the outer peripheries 20c and 20d and connected so as to connect the first side surface portions 21 and 22 with each other are overlapped. A pair of first in state A pair of second side surface portions 23 and 24 bonded to the outer side surfaces of the side surface portions 21 and 22, and the curved portion in which the opening of the housing portion 10 is continuous at the pair of first side surface portions 21 and 22. Since it is formed in a cross-sectional shape, leakage of the object to be stored from the storage part 10 can be prevented with a simple configuration, and the removal property of the object to be stored can be improved.

  That is, in the paper container 1 of the present embodiment, an outer peripheral surface (and an inner peripheral surface of the accommodating portion 10) is formed by the pair of first side surface portions 21 and 22 and the pair of second side surface portions 23 and 24. The pair of first side surface portions 21 in a state in which the pair of second side surface portions 23 and 24 are overlapped with the connecting pieces 25 continuously provided so as to connect the pair of first side surface portions 21 and 22 to each other. -Since it adhere | attaches on the outer surface of 22, it can prevent effectively that the to-be-contained object accommodated in the accommodating part 10 leaks from the clearance gap between each side part 21-24. Moreover, since the opening part of the accommodating part 10 is formed in the curved cross-sectional shape which continued in a pair of 1st side part 21 * 22, an opening part is continuously formed in a square cross-sectional shape like the conventional paper container. Compared to what is to be stored, for example, even when the container 10 is filled and accommodated as a container for ice cream or muffin cake, the container can be easily taken out.

  In particular, in the paper container 1 according to the present embodiment, the pair of second side surface portions 23 and 24 are formed such that the edge portions 23c and 24c in the extending direction are formed in a concave arc shape and are bent in the width direction to be paired with the first pair of second side portions 23 and 24. Since it is bonded to the outer surface of the one side surface portion 21, 22, the pair of second side surface portions 23, 24 are similarly bent along the pair of first side surface portions 21, 22 which are bent and bonded in the width direction. It can be bent and bonded, the bonding strength of the pair of second side surface portions 23 and 24 to the pair of first side surface portions 21 and 22 is improved, and the opening portion of the accommodating portion 10 is continuous as described above. While being able to hold | maintain the shape of the paper container 1 formed in a cross-sectional shape reliably, the surface of the outer peripheral surface of the paper container 1 can be smoothly continued.

  Further, in the paper container 1 of the present embodiment, the bottom surface portion 20 is formed in a convex arc shape with the outer peripheries 20a to 20d projecting outward, so that the pair of first side surface portions 21 and 22 and the pair of first side portions 20 and 20d. In the state where the two side surface portions 23 and 24 are raised from the bottom surface portion 20, the side surface portions 21 to 24 are easily inclined outwardly, and the diameter of the paper container 1 increases as the housing portion 10 moves toward the opening portion. It can shape | mold so that it may become a shape, and can take out the to-be-contained object more.

  Further, in the paper container 1 of the present embodiment, the bottom surface portion 20 is inflated in an arch shape in the direction of the housing portion 10 and abuts against the installation surface at the corner portion 20e where the outer peripheries 20a to 20d intersect. Therefore, since the flat portion is not brought into contact with the installation surface in a state where the paper container 1 is installed, the stability in the installation state can be further improved.

  Note that the configuration of the paper container 1 and the manufacturing method thereof are not limited to the above-described embodiments, and various modifications can be made without departing from the object of the present invention.

  That is, in the above-described embodiment, one foldable blank provided with the bottom surface portion 20, the pair of first side surface portions 21 and 22, the pair of second side surface portions 23 and 24, the connecting piece 25, and the like. Although the structure shape | molded by 2 was demonstrated, about the shape and arrangement | positioning structure, such as the bottom face part 20 and the side parts 21-24 in this blank 2, it is not limited to the structure mentioned above, The outer periphery 20a-20d of the bottom face part 20 If it is the structure from which the paper container 1 in which the accommodating part 10 of an upper opening is formed in the side parts 21-24 inclined in the outward direction provided in can be changed suitably and can be formed.

  For example, like the blank 2 constituting the paper container 1 of another embodiment shown in FIG. 7, the width direction length W1 of the first side surface portion 21 is the first side surface portion in the shape of the first side surface portions 21 and 22. 22 is shorter than the width direction length W2 of W2 (W1 <W2), and the protrusion direction length L1 of the first side surface portion 21 and the protrusion direction length L2 of the first side surface portion 22 are equal (L1 = L2). May be. The shape of the blank 2 can be preferably used when a larger paper container 1 is formed.

  Moreover, although the Example mentioned above demonstrated the structure formed in the square shape where the length of the width direction is equal in the bottom face part 20 of the blank 2 (refer FIG. 4), for example, width for every pair of outer periphery which opposes You may form in the square shape from which the length of a direction differs. The paper container 1 formed using the blank 2 is formed so that the bottom surface portion 20 has a rectangular shape in a plan view and the opening of the housing portion 10 has a substantially elliptical shape (curved cross section).

  Moreover, although the outer periphery 20a-20d was demonstrated in the Example mentioned above in the bottom face part 20 of the blank 2 that the outer periphery 20a-20d was formed in the convex circular arc shape which protrudes an outer side (refer FIG. 4), all the outer periphery 20a- 20d may not be formed in a convex arc shape, for example, any of the outer peripheries 20a to 20d may be formed in a convex arc shape, and at least the first side surface portions 21 and 22 are opposed to each other. The outer peripheries 20a and 20b are preferably formed in a convex arc shape.

  In addition, the paper container 1 of the above-described embodiment is configured such that the flat surface portion of the bottom surface portion 20 is inflated in an arch shape in the direction of the accommodating portion 10 (see FIG. 2). The flat portion may be formed in a horizontal plane so as to be in contact with the installation surface.

  Further, in the paper container 1 of the above-described embodiment, a special process is not performed on the opening of the storage unit 10. For example, a top curl process may be performed on the periphery of the opening of the storage unit 10.

DESCRIPTION OF SYMBOLS 1 Paper container 2 Blank 10 Storage part 20 Bottom part 20a Outer periphery 20b Outer periphery 20c Outer periphery 20d Outer periphery 20e Corner part 21 First side part 21a First crease line 21b End part 21c Edge part 22 First side part 22a First First fold line 22b End portion 22c Edge portion 23 Second side surface portion 23a Second fold line 23c Edge portion 24 Second side surface portion 24a Second fold line 24c Edge portion 25 Connecting piece 25a Third fold line 25b Third fold line

Claims (4)

In a paper container formed from one foldable blank and having an upper opening accommodating portion formed on a plurality of side surfaces inclined outwardly provided on the outer periphery of the bottom surface portion,
A pair of first members that extend in a standing state on the outer periphery of the bottom surface facing each other, are longer in the width direction than the outer periphery, are bent in the width direction, and are bonded so that the ends overlap each other Side part,
A triangular shape that extends in a standing state on the outer periphery facing the bottom surface portion, is formed shorter in the width direction than the outer periphery, and is connected so as to connect the pair of first side surface portions with each other. A pair of second side surfaces bonded to the outer surfaces of the pair of first side surfaces in a state where the connecting pieces are overlapped;
Comprising
The paper container, wherein the opening of the housing portion is formed in a curved cross-sectional shape continuous with the pair of first side surface portions.   2. The pair of second side surface portions according to claim 1, wherein an edge in an extending direction is formed in a concave arc shape, is bent in a width direction, and is bonded to an outer surface of the pair of first side surface portions. Paper container.   The paper container according to claim 1, wherein the bottom surface portion is formed in a convex arc shape in which the outer periphery protrudes outward.   4. The bottom surface portion according to claim 1, wherein the flat surface portion is inflated in an arch shape in the direction of the accommodating portion, and is in contact with the installation surface at a corner portion where the outer periphery intersects. Paper container.

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