bag body

Abstract

This invention aims to provide a bag that, through simple operation, can easily and stably hold a container, and significantly reduces the likelihood of liquid wetting the bag even if the beverage leaks from the container. The bag has a body with a bottom and a peripheral wall portion connected to the bottom at its periphery. The body forms a space surrounded by the bottom and the peripheral wall portion that can accommodate contents, and an opening for inserting the contents into the space. The body is provided with a position limiting member having a limiting wall portion to restrict movement of the contents within the space. The position limiting member is at least engaged with the inner surface of the peripheral wall portion. When the contents are positioned in the space portion such that movement is restricted by the limiting wall portion, if the surface of the limiting wall portion facing the contents is designated as an opposing surface, the limiting wall portion can be configured to have a first shape state where the opposing surface is concave and a second shape state where the opposing surface is convex.

Claims

1. A bag body comprising: a body having a bottom and a peripheral wall portion connected to the bottom at a periphery of the bottom, the body forming a space portion surrounded by the bottom and the peripheral wall portion and capable of accommodating contents, and an opening portion for inserting the contents into the space portion, the body being provided with a position limiting member having a limiting wall portion to limit movement of the contents within the space portion, the position limiting member being at least engaged with an inner surface of the peripheral wall portion, wherein when the contents are disposed in the space portion such that the movement is limited by the limiting wall portion, if the surface of the limiting wall portion facing the contents is designated as a counter surface, the limiting wall portion is configured to be capable of forming a first shape state in which the counter surface forms a concave surface, and a second shape state different from the first shape state.

2. The bag as described in claim 1, wherein, The inner surface of the peripheral wall has at least one corner extending from the bottom toward the opening, and when the limiting wall is in the second shape state, the position limiting member covers at least a portion of at least one of the corners.

3. The bag as described in claim 2, wherein, The peripheral wall portion has a set of opposing wall surfaces and a set of opposing side wall surfaces, each of the wall surfaces being connected to the side wall surface at its side edge, and the corner portion being formed at the boundary position of the wall surface and the side wall surface.

4. The bag as described in claim 3, wherein, The position limiting member is engaged with the wall face and the side wall face.

5. The bag as described in claim 3, wherein, When the set of wall surfaces is designated as the first wall surface and the second wall surface, a body folded edge portion is formed on the set of side wall surfaces to change the separation distance between the first wall surface and the second wall surface.

6. The bag as described in claim 1, wherein, The position limiting member is further included inside the space, supporting the contents from below at the inner bottom.

7. The bag as described in claim 6, wherein, The inner bottom has a folded edge.

8. The bag as claimed in claim 1, wherein, The second shape state is such that the limiting wall portion forms a convex surface on the opposing surface in such a way that the limiting wall portion is along the inner surface of the peripheral wall portion.

9. The bag as claimed in claim 1, wherein, The position limiting member has an intervening wall that makes surface contact with the inner surface of the peripheral wall portion and is located between the peripheral wall portion and the limiting wall portion, and the intervening wall is at least joined to the inner surface of the peripheral wall portion.

10. The bag as claimed in claim 9, wherein, When the limiting wall is in the second shape state, the lower end of the limiting wall is located above the lower end of the interlayer wall.

11. The bag as claimed in claim 10, wherein, A gap space is formed between the wall and the peripheral wall portion of the medium.

12. The bag as claimed in claim 1, wherein, A fold-back section is formed at the upper end of the limiting wall section.

13. The bag as claimed in claim 1, wherein, A reinforcing member is provided at the upper end of the limiting wall.

14. The bag as claimed in claim 1, wherein, The upper end of the limiting wall is provided with a reinforcing material, and the upper end of the limiting wall has a folded-back portion formed in such a way as to cover the reinforcing material.

15. The bag as claimed in claim 1, wherein, The peripheral wall has a set of opposing wall surfaces. When the set of wall surfaces is designated as a first wall surface and a second wall surface, a cover is formed at the upper end of the first wall surface to cover the upper end of the second wall surface. The cover is provided with an adhesive placement part containing an adhesive. The adhesive placement part can be bonded to the second wall surface when the upper end of the second wall surface is covered by the cover.

16. The bag as claimed in claim 15, wherein, A gripping part is provided at a predetermined position on the first wall surface.

17. The bag as claimed in claim 16, wherein, The grip stands upright when the cover covers the upper end of the second wall surface.

18. The bag as claimed in claim 15, wherein, A weakening portion is provided on the first wall surface, the weakening portion being located in a position that avoids the cover portion, or in a portion that avoids the adhesive configuration portion in the cover portion.

19. The bag as claimed in claim 1, wherein, The location restricts the component to be waterproof.

20. The bag as claimed in claim 1, wherein, The body is made of paper-like material.

21. The bag as claimed in claim 1, wherein, A waterproof layer is provided on the upper surface of the bottom.

22. The bag as claimed in claim 1, wherein, The contents are containers, and when the contents are placed in the space, there is a gap between at least a portion of the upper end of the limiting wall and the outer peripheral surface of the container.

23. The bag as claimed in claim 1, wherein, The second shape state is that the opposing surfaces form a convex surface.

24. The bag as claimed in claim 6, wherein, The inner bottom and the limiting wall are continuously connected.

25. The bag as claimed in claim 6, wherein, When the limiting wall portion of the position limiting member is in the first shape state, at least a portion of the inner bottom has an inclined surface that slopes downward from the boundary position of the inner bottom and the limiting wall portion toward the direction of approaching the peripheral wall portion.

26. The bag as claimed in claim 15, wherein, A release paper is provided so as to cover the adhesive preparation area.

27. The bag as claimed in claim 26, wherein, A marking section is provided on the exposed side of the release paper.

28. A bag body comprising: a body having a bottom and a peripheral wall portion connected to the bottom at a periphery of the bottom; the body forming a space portion surrounded by the bottom and the peripheral wall portion and capable of accommodating contents; and an opening portion for inserting the contents into the space portion; the peripheral wall portion having a first wall portion and a second wall portion as a pair of opposing wall portions; a connecting member affixed to the outer surface of the peripheral wall portion; the connecting member having a first engaging surface forming portion and a second engaging surface forming portion; the first engaging surface forming portion affixed to a predetermined area of ​​the outer surface of the first wall portion; and when the outer surfaces of the first wall portion and the second wall portion are facing each other in a state where predetermined portions at the upper ends of the first wall portion and predetermined portions at the upper ends of the second wall portion overlap, forming a curved structure defined by the portion formed by bending the first wall portion and the second wall portion, at least a portion of the second engaging surface forming portion is configured to engage with the outer surface of the second wall portion. When the curved structure is not formed, the second mating surface forming portion avoids mating with the outer surface of the peripheral wall portion.

29. The bag as claimed in claim 28, wherein, The configuration is such that when the second mating surface forming portion is mated to the peripheral wall portion, a grippable gap can be formed between the first peripheral wall portion forming portion in which the curved structure is formed and the second peripheral wall portion forming portion other than the first peripheral wall portion forming portion.

30. The bag as claimed in claim 28, wherein, The configuration is such that when the curved structure is formed, the second mating surface forming portion can be mated to the first wall surface and the second wall surface.

31. The bag as described in claim 28, wherein, The curved structure is defined by the portion formed by bending the first wall surface and the second wall surface toward the second wall surface in such a way that the outer surfaces of the first wall surface and the second wall surface face each other.

32. The bag as claimed in claim 28, wherein, The curved structure is defined by the portion formed by bending the first wall surface and the second wall surface toward the first wall surface in such a way that the outer surfaces of the first wall surface and the second wall surface face each other.

33. The bag as described in claim 28, wherein, In this curved structure, the opening is concealed.

34. The bag as claimed in claim 28, wherein, A peeling member with peeling properties is provided in such a way as to cover the second joint surface forming portion.

35. The bag as claimed in claim 34, wherein, The peeling member is configured to prevent complete separation from the joining member.

36. A bag body comprising: a body having a bottom and a peripheral wall portion connected to the bottom at a periphery of the bottom; the body forming a space portion surrounded by the bottom and the peripheral wall portion and capable of accommodating contents; and an opening portion for inserting the contents into the space portion; the peripheral wall portion having a first wall portion and a second wall portion as a pair of opposing wall portions; a sealing sheet affixed to the outer surface of the peripheral wall portion; the sealing sheet having a sealing member detachably mounted; the sealing member having a mating surface forming portion; and when, in a state where predetermined portions at the upper ends of the first wall portion and predetermined portions at the upper ends of the second wall portion overlap, and the outer surfaces of the first wall portion and the second wall portion face each other, forming a curved structure defined by the portion formed by bending the first wall portion and the second wall portion, the sealing member is disposed across the lower end of the curved structure, and configured to engage with the peripheral wall portion when the mating surface forming portion faces the first wall portion and the second wall portion. The configuration is such that when the sealing member is engaged with the peripheral wall portion, a grippable gap can be formed between the first peripheral wall portion forming the curved structure in the peripheral wall portion and the second peripheral wall portion forming portion other than the first peripheral wall portion forming portion.

37. The bag as claimed in claim 36, wherein, The sealing member has a through hole, which is configured to allow the gap to be exposed when the sealing member is engaged with the peripheral wall portion.

38. A bag body comprising: a body having a bottom and a peripheral wall portion connected to the bottom at a periphery of the bottom, the body forming a space portion surrounded by the bottom and the peripheral wall portion and capable of accommodating contents, and an opening portion for inserting the contents into the space portion, the peripheral wall portion having a first wall portion and a second wall portion as a pair of opposing wall portions, the peripheral wall portion having a small piece portion having an adhesive attachment surface disposed of an adhesive material, the small piece portion having a fixed end fixed to the peripheral wall portion and a free end displaceable relative to the peripheral wall portion, the free end of the small piece portion being rotatable at least about the fixed end as an axis, and a peelable portion having a small piece portion opposing surface at a position facing the adhesive attachment surface, and being freely peelable and reattached relative to the small piece portion with respect to the small piece portion opposing surface. The peelable portion is positioned to avoid exposure to the outside of the body, and is configured such that, while at least a portion of the small piece is peeled off from the peelable portion and bent, the movement that would separate the first wall surface and the second wall surface is prevented, thereby allowing the small piece to be bonded to the peripheral wall portion in the area of ​​the adhesive attachment surface.

39. The bag as described in claim 38, wherein, A bonding material sheet, which is not integrally formed with respect to the peripheral wall portion, is joined thereto, and a portion of the bonding material sheet forms the small piece portion.

40. The bag as claimed in claim 38, wherein, The peelable portion is formed separately from the peripheral wall portion and is made of peelable paper.

41. The bag as described in claim 40, wherein, On the peripheral wall portion, a bonding material sheet is formed separately from the peripheral wall portion. A portion of the bonding material sheet forms the small piece portion. The release paper bonds the side opposite to the small piece portion to the bonding material sheet.

42. The bag as claimed in claim 40, wherein, A bonding material sheet, which is not integrally formed with the peripheral wall portion, is joined to the peripheral wall portion. A portion of the bonding material sheet forms the small piece portion. The bonding material sheet is joined to the outer surface side of the peripheral wall portion, while the release paper is joined to the inner surface side of the peripheral wall portion.

43. The bag as described in claim 38, wherein, The small piece and the peelable part are respectively disposed in a plurality of positions, and each peelable part is provided at a position corresponding to each small piece.

44. The bag as described in claim 38, wherein, The free end of the small piece is provided with a pull tab configured to be held.

45. The bag as claimed in claim 1, wherein, The body has at least one corner portion extending from the bottom toward the opening on the inner surface of the peripheral wall portion. The body is composed of a folded structure formed by folding a blank made of paper material, and the position limiting member is joined to the inner surface side of the folded structure. The blank has an upper blank edge portion forming the opening and a lower blank edge portion formed on the opposite end side relative to the upper blank edge portion. As blank side ends located on opposite end sides and connected to the upper blank edge portion and the lower blank edge portion, it has a first blank side end portion and a second blank side end portion. As overlapping structure corresponding portions for joining predetermined portions from the inner side of the first blank side end portion and predetermined portions from the inner side of the second blank side end portion, it has a first overlapping structure corresponding portion defined by the predetermined portion of the first blank side end portion and a second overlapping structure corresponding portion defined by the predetermined portion of the second blank side end portion. The folded structure has a side end joint that joins the first overlapping structure corresponding portion and the second overlapping structure corresponding portion to each other, and the first overlapping structure corresponding portion and the second overlapping structure corresponding portion are sequentially positioned from the inner surface side of the folded structure. In the blank, a predetermined relative region is defined as the area opposite to the position limiting member, and the position where the blank is folded at the part corresponding to the corner is defined as the corner corresponding fold position. In the case that the area of ​​the first overlapping structure corresponding portion facing the inside of the folded structure is defined as the first inward region, and the area of ​​the second overlapping structure corresponding portion facing the inside of the folded structure is defined as the second inward region, at least one of the predetermined relative regions is a region that avoids the second inward region and is a region that crosses the corner corresponding fold position, and one of the two side end edges of the predetermined relative region is defined as being located in the first inward region.

46. ​​The bag as claimed in claim 45, wherein, In this blank, when the portion corresponding to the side end joint in the first overlapping structure is designated as the joint corresponding portion (A), and the portion corresponding to the portion where the position limiting member is joined to the bent structure is designated as the joint corresponding portion (B), at least a portion of the joint corresponding portion (A) also serves as at least a portion of the joint corresponding portion (B).

47. The bag as claimed in claim 45, wherein, The body has a handle structure joined to the folded structure. In the blank, when the area corresponding to the handle structure is defined as the handle joining area, the handle joining area is defined as the area that does not cross the end edge of the blank side end in the state of the folded structure.

48. The bag as claimed in claim 1, wherein, The peripheral wall portion has a set of opposing wall surfaces and a set of opposing side wall surfaces, each of the wall surfaces being connected to the side wall surface at its side edge. The body is constructed of a folded structure formed by folding a blank made of paper-like material, and the position limiting member is engaged with the inner surface of the folded structure. The blank has an upper side edge forming the opening and a lower side edge forming on the opposite end side relative to the upper side edge. The folded structure has: a set of first inner folds having a structure in which a set of first lower sides are bent toward the inside of the folded structure, the set of first lower sides being defined by the portion of the blank from the lower end of the portion that constitutes the set of sidewall surfaces to the lower edge of the blank; and a set of second inner folds having a structure in which a set of second lower sides are bent toward the inside of the folded structure from the lower surface of the first lower sides, the set of second lower sides being defined by the portion of the blank from the lower end of the portion that constitutes the set of sidewall surfaces to the lower edge of the blank, and the folded structure having an overlapping structure defined as the portion of the set of second inner folds overlapping each other, and at least one of the set of second inner folds having a lower end folding portion for folding back the lower edge of the blank, at least a portion of the lower end folding portion being disposed in the overlapping structure.

49. The bag as claimed in claim 48, wherein, The second inner fold has a slanted fold that uses a straight line extending obliquely toward the lower edge of the lower edge of the blank as a bending axis to fold the blank back. The first inner fold is connected to the slanted fold of the second inner fold, and the width of the second inner fold is reduced toward the lower end of the lower edge of the blank.

50. The bag as claimed in claim 1, wherein, At least in the second shape state, the position limiting member has a folding structure in the limiting wall portion.

51. The bag as claimed in claim 1, wherein, The peripheral wall portion, as a set of opposing wall surfaces, has a first wall surface and a second wall surface, and at least one position limiting member is engaged with the first wall surface and the second wall surface.

52. The bag as claimed in claim 1, wherein, The upper surface of the bottom is provided with a middle pad material.

53. The bag as claimed in claim 52, wherein, The padding material is a resin sheet.

54. The bag as claimed in claim 53, wherein, The padding material covers a predetermined area on the lower side of the bottom and the peripheral wall.

55. The bag as claimed in claim 1, wherein, The peripheral wall portion has a set of opposing wall surfaces and a set of opposing side wall surfaces. When the set of wall surfaces is designated as the first wall surface and the second wall surface, a body folded edge portion is formed on the set of side wall surfaces to change the separation distance between the first wall surface and the second wall surface. A deformation limiting structure is provided to limit the deformation of the body folded edge portion when it is bent at a predetermined position on the side wall surface.

56. The bag as claimed in claim 1, wherein, The main body is provided with a handle portion, which has a handle plate portion and a through portion extending through the handle plate portion, and a reinforcing portion is provided in a predetermined area on the surface of the handle plate portion that is at least higher than the through portion.

57. The bag as described in claim 56, wherein, The reinforcing part has a structure that allows the reinforcing material to be joined to the surface of the handle piece, and the reinforcing material is a resin sheet.

58. The bag as claimed in claim 57, wherein, The reinforcing material is partially joined to the handle piece.

59. The bag as described in claim 56, wherein, The reinforcing part has a structure that allows the reinforcing material to be joined to the surface of the handle piece, and the reinforcing material is non-woven fabric.

60. The bag as claimed in claim 59, wherein, The reinforcing material is partially joined to the handle piece, and the nonwoven fabric contains long fibers.

61. The bag as described in claim 56, wherein, The reinforcing part has a folding structure on the upper end side of the handle piece, and a reinforcing membrane is placed between the opposing portions of the folding structure in the handle piece.

62. The bag as claimed in claim 56, wherein, The handle piece is integrally formed with the main body.

63. The bag as claimed in claim 56, wherein, The handle portion is not integrally formed with the body, and the inner part of the side end of the handle portion is joined to the body.

64. The bag as claimed in claim 56, wherein, The peripheral wall has a set of opposing wall surfaces, and the handle piece is disposed on each of the pair of wall surfaces, and the width of the handle piece is smaller than the width of the side wall.

65. The bag as claimed in claim 56, wherein, The peripheral wall has a set of opposing wall surfaces, and the handle piece is disposed on each of the pair of wall surfaces, and an adhesive is disposed on the handle piece disposed on at least one side of the wall.

66. The bag as claimed in claim 1, wherein, The main body is provided with a handle portion, which includes a handle support portion, a cut portion cut from the upper edge of the handle support portion to a predetermined position, a handle material arranged in such a way that it crosses at least two of the outline portions of the cut portion, and a covering material covering a portion of the handle material. The handle support portion and the covering material clamp the handle material and engage the handle material, and an engagement auxiliary piece is provided between the handle support portion and the covering material.

67. The bag as claimed in claim 1, wherein, The peripheral wall portion has a set of opposing wall surfaces and a set of opposing side wall surfaces, each of the wall surfaces being connected to the side wall surface at the side edge of the wall surface. The body is composed of a folded structure formed by folding a blank made of paper material, and the position limiting member is engaged with the inner surface side of the folded structure. The position limiting member is configured as a continuous strip arranged from one side edge of the blank toward the other side edge and is engaged with the blank at a predetermined position.

68. The bag as claimed in claim 67, wherein, The joint between the position limiting member and the limiting member of the blank is composed of a plurality of unit joints disposed at different positions and independent of each other. At least one of the limiting wall portions is formed by the portion of an adjacent unit joint held by at least one set of unit joints, and the upper edge length of the limiting wall portion is greater than the lower edge length of the limiting wall portion.

69. The bag as claimed in claim 1, wherein, The positional constraint component is water-absorbing.

70. The bag as claimed in claim 1, wherein, The position limiting member has a plurality of limiting wall through portions.

71. The bag as claimed in claim 1, wherein, The position limiting member is composed of a fiber end body made up of multiple long fibers arranged in a row.

72. The bag as claimed in claim 1, wherein, The area of ​​the opposing surface of the limiting wall is greater than the area of ​​the surface region corresponding to the opposing surface in the peripheral wall.

73. The bag as claimed in claim 1, wherein, In this second shape state, an overlapping portion is formed in the limiting wall portion.

74. The bag as claimed in claim 1, wherein, The body is configured such that its three-dimensional structure can be transformed from a first structure to a second structure. When the body is in the first structure, it has a set of folded wall surfaces that are folded from the top to the bottom, and opposing wall surfaces facing each other across the folded wall surfaces. Each opposing wall surface has two side edges connected to the folded wall surface, and a lower edge joining portion where the lower edge of the opposing wall surface joins the lower edge of the folded wall surface facing the first lower edge. When the body is in the second structure, it has a peripheral wall portion and a bottom. The peripheral wall portion has a set of opposing wall surfaces and a set of opposing side wall surfaces. The side wall surfaces have body folded edges. Each wall surface has two side edges connected to the aforementioned side wall surfaces, and a corner portion is present at the boundary between the wall surface and the side wall surface. The body is configured to deform its three-dimensional structure from the first structure to the second structure by folding the body in a manner that satisfies the following conditions 1 to 4: Condition 1: Unfold the folded edge portion of the first structure; Condition 2: Fold the folded wall portion inward by using a predetermined reference position from the lower end side of each folded wall portion toward the upper side as the first folding axis, so that the portion of the folded wall portion above the reference position is used as the side wall portion; Condition 3: Fold the portion of the folded wall portion inward by using a straight line obliquely from the outer end of the folded wall portion toward the inner end of the lower edge joint as the second folding axis; Condition 4: Fold the opposing wall portion by using a straight line connecting the two positions at the reference position as the third folding axis in each of the two side edges of the opposing wall portion, so that the portion of the opposing wall portion above the third folding axis is used as the wall portion.

75. The bag as claimed in claim 74, wherein, At least the lower edge of the opposing wall surface is joined with a thin film material.

76. The bag as described in claim 74, wherein, A crease is applied at at least one position corresponding to the position from the first folding shaft to the third folding shaft.

77. The bag as claimed in claim 1, wherein, It has a hanging fixture receiving structure.

78. The bag as claimed in claim 1, wherein, The upper side of the peripheral wall has a plurality of closed portions facing each other, at least one of the closed portions having a mating surface having an adhesive. When the mating surface of one closed portion is mated to the adhesive-facing surface of another closed portion that is opposite to the mating surface of the mating portion, the plurality of closed portions are configured to cover the opening.

79. The bag as claimed in claim 78, wherein, At least one of the closure portions has an extension integrally formed with the body, having a bonding surface of the adhesive and a bonding opposing surface of the adhesive facing the bonding surface, located in a predetermined area of ​​the extension portion.

80. The bag as claimed in claim 78, wherein, At least one of the closure portions is composed of a closure portion forming member that is not integrally formed with respect to the peripheral wall portion and is joined to the peripheral wall portion.

81. The bag as claimed in claim 80, wherein, It has a handle, and the closing part forming member is located inside the body, closer to the handle, and engages with the body.

82. The bag as claimed in claim 78, wherein, The device has a handle, which includes a handle member and a handle fixing piece for fixing the handle member. The handle fixing piece is engaged with the inner surface side of the peripheral wall to cover at least a portion of the handle member, and at least a portion of the handle also serves as the closure portion.

83. The bag as claimed in claim 78, wherein, At least one of the closure portions is provided with a weakening portion extending upward from the upper side of the peripheral wall portion and lower than the mating surface.

84. The bag as claimed in claim 78, wherein, The lower end of the joint surface is separated from the weakened part.

85. The bag as claimed in claim 78, wherein, The closure has a notch at the end of the weakened part.

86. The bag as claimed in claim 78, wherein, Each of the plurality of closed portions is provided with a weakening portion. When the plurality of closed portions are configured such that the adhesive surface of the closed portion is parallel to the opposite surface, the plurality of closed portions are aligned with the vertical position of their respective weakening portions.

87. The bag as claimed in claim 78, wherein, Each of the plurality of closures is provided with a weakening portion. When the plurality of closures are configured such that the adhesive surface of the closure is parallel to the opposing surface, the lower end of the mating surface of one closure is located above the weakening portion formed on the opposing surface of another closure having the mating surface facing the other.

88. The bag as claimed in claim 1, wherein, The body has a peripheral wall portion and a bottom portion. The peripheral wall portion has a set of opposing wall surfaces and a set of opposing side wall surfaces. The side wall surfaces have a body folded edge portion. The body folded edge portion has a crease extending downward from the upper end of the side wall surface portion at a predetermined position on the side wall surface portion. The upper end of the side wall surface portion has: a first protrusion portion, which is located at a first position on a first side edge of the side wall surface portion facing from the upper end position of the crease; and a second protrusion portion, which is located at a second position on a second side edge of the side wall surface portion facing from the upper end position of the crease. The first protrusion portion and the second protrusion portion are configured to contact the adhesive surface when the body folded edge portion is closed.

89. The bag as claimed in claim 1, wherein, The body has a peripheral wall portion, which has a set of opposing wall surfaces and a set of opposing side wall surfaces. The side wall surfaces have a body flange portion. A cover structure forming portion is provided on the upper side of at least one of the wall surfaces. A protrusion is provided at the upper end of the side wall surface. When the body flange portion is in a reduced state, at least a portion of the protrusion faces the outer side of the wall surface. At least one of the cover structure forming portions is configured to form an opening covering structure by bending from the outer surface side of one wall surface to the outer surface side of another wall surface. A bonding layer is provided on the inner surface side of the cover structure forming portion. In the opening covering structure, the bonding layer contacts the protrusion from the outer surface side of the peripheral wall portion.

90. The bag as claimed in claim 89, wherein, The opposing wall surfaces include a first wall surface and a second wall surface. The cover structure forming part includes a first cover structure forming part disposed on the upper side of the first wall surface and a second cover structure forming part disposed on the upper side of the second wall surface. When the body folded edge is in a reduced state, at least a portion of the protrusion faces the outer surface side of the second cover structure forming part. The first cover structure forming part is configured to cover at least a portion of the second cover structure forming part and bend the front end of the first cover structure forming part to the outer surface side of the second wall surface to form the opening cover structure.

91. The bag as claimed in claim 90, wherein, The second cover structure forming part is provided with an exposure facilitation part, and the protrusion faces outward from the exposure facilitation part.

92. The bag as described in claim 90, wherein, When the cover structure forming part is upright, the upper edge of the first cover structure forming part is located at a position higher than the upper edge of the second cover structure forming part.

93. The bag as claimed in claim 89, wherein, At least one of the cover structure forming portions is integrally formed with the peripheral wall portion.

94. The bag as claimed in claim 89, wherein, At least one of the cover structure forming portions has a cover structure forming member that is not integrally formed with the peripheral wall portion and is joined to the peripheral wall portion.

95. The bag as claimed in claim 89, wherein, A handle is provided on the outer surface of the peripheral wall.

96. The bag as claimed in claim 1, wherein, The body has a peripheral wall portion and a bottom. The peripheral wall portion has a first wall portion and a second wall portion as a set of opposing wall portions. It has a first cover structure forming portion disposed on the upper side of the first wall portion and a second cover structure forming portion disposed on the upper side of the second wall portion. A bonding layer is provided on the inner surface side of the first cover structure forming portion. A weakening portion is formed along the surface of the first cover structure forming portion at a predetermined position closer to the bottom than the bonding layer. The weakening portion is formed such that when the weakening portion is broken, the upper portion near the front end of the first cover structure forming portion and the lower portion away from the front end of the first cover structure forming portion are separated based on the weakening portion. It is configured to form an opening covering structure. The opening covering structure has a structure formed by bending the first cover structure forming portion and the second cover structure forming portion toward the outer surface side of the second wall portion and a structure that positions the front end of the first cover structure forming portion on the outer surface side of the second wall portion.

97. The bag as claimed in claim 96, wherein, The peripheral wall portion has a set of opposing sidewall portions, and has a sidewall extension portion formed by extending a predetermined portion of the end of the sidewall portion upward, and an end extension portion formed by extending a predetermined portion of the side end of the second cover structure forming portion upward. The end edge of the end edge portion of the second cover structure forming portion and the end edge of the end extension portion that is continuous with the end edge portion also serve as the end edge of the sidewall extension portion.

98. The bag as claimed in claim 97, wherein, A sidewall weakening portion is provided on the sidewall extension portion, which extends upward from a predetermined portion at the end of the sidewall face.

99. The bag as described in claim 96, wherein, The peripheral wall portion has a set of opposing sidewall surfaces, each sidewall surface having a body folded edge portion and a recessed portion formed therein. The recessed portion is formed by a concave cut from the upper end of the second cover structure forming portion toward the bottom. The recessed portion is a part facing the sidewall surface portion when the body folded edge portion is in a reduced state.

100. The bag as claimed in claim 99, wherein, The sidewall surface has the body folded portion, and the sidewall surface has a plurality of regions that overlap when the body folded portion is in a reduced state. In the plurality of regions, a first through portion is formed at a position corresponding to the recess in a designated region defined as the region of the contour portion facing the recess.

101. The bag as claimed in claim 100, wherein, In the plurality of regions, when the body folded edge is made into a reduced state, a second through portion is formed in the opposite region defined as the region facing the designated region, at a position corresponding to the first through portion.

102. The bag as claimed in claim 101, wherein, In the first wall surface and / or the first cover structure forming portion, a wall surface weakening portion is formed at a position corresponding to the second through portion.

103. The bag as claimed in claim 96, wherein, A handle is provided on the outer surface of the peripheral wall.

104. The bag as claimed in claim 1, wherein, The body has a peripheral wall portion, which has a set of opposing wall portions. A cover structure forming portion is provided on the upper side of at least one of the wall portions. The cover structure forming portion is configured to bend from the wall portion of one side to the outer surface of the other side of the wall portion at a predetermined position as a bending axis to form an opening covering structure. On the inner surface side of the cover structure forming portion, there is at least a bonding layer disposed above the bending axis, and a reinforcing sheet disposed in a region from a predetermined position above the bending axis to a predetermined position below the bending axis. A weakening portion is formed along the bending axis.

105. The bag as claimed in claim 104, wherein, The bonding layer is bonded to the surface of the inner surface side of the reinforcing sheet.

106. The bag as claimed in claim 104, wherein, The peripheral wall portion has a set of opposing sidewall portions, each sidewall portion having a body folded edge portion, and an extended wall portion connected to the cover structure forming portion on the upper side of the sidewall portion. The opening covering structure is formed such that both the cover structure forming portion and the extended wall portion are bent from one side of the wall portion to the outer surface of the other side of the wall portion.

107. The bag as claimed in claim 106, wherein, The vulnerable portion further forms in the extended wall portion.

108. The bag as claimed in claim 106, wherein, The cover structure forming part has a contour that slopes upwards in the direction away from the reference position, with the upper end of the boundary position between the cover structure forming part and the extended wall part as the reference position.

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