JP2020142839A - Paper container - Google Patents

Paper container Download PDF

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Publication number
JP2020142839A
JP2020142839A JP2019042076A JP2019042076A JP2020142839A JP 2020142839 A JP2020142839 A JP 2020142839A JP 2019042076 A JP2019042076 A JP 2019042076A JP 2019042076 A JP2019042076 A JP 2019042076A JP 2020142839 A JP2020142839 A JP 2020142839A
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Japan
Prior art keywords
line
paper container
virtual
panel
flap
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JP2019042076A
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Japanese (ja)
Inventor
孝也 中村
Takaya Nakamura
孝也 中村
芳貴 米田
Yoshitaka Yoneda
芳貴 米田
栄一 阿曽井
Eiichi Asoi
栄一 阿曽井
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Nippon Paper Industries Co Ltd
Jujo Paper Co Ltd
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Nippon Paper Industries Co Ltd
Jujo Paper Co Ltd
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Application filed by Nippon Paper Industries Co Ltd, Jujo Paper Co Ltd filed Critical Nippon Paper Industries Co Ltd
Priority to JP2019042076A priority Critical patent/JP2020142839A/en
Priority to PCT/JP2020/009007 priority patent/WO2020179801A1/en
Publication of JP2020142839A publication Critical patent/JP2020142839A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/02—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
    • B65D5/06—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end-closing or contents-supporting elements formed by folding inwardly a wall extending from, and continuously around, an end of the tubular body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/40—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper specially constructed to contain liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks

Abstract

To obtain a paper container with excellent designability, by reducing a repulsive force against bending of a flap, suppressing swelling of the paper container and warpage of a flap, enabling efficient and smooth storage and transportation work.SOLUTION: A first virtual line L1 connecting the upper ends 9a and 9b of a trunk part vertical folding line 9 on both sides of the trunk part left and right side panels 6 and 8 with a straight line and a second virtual line L2 orthogonal to the first virtual line L1 extending from a midpoint 23 as a starting point of a second top seal horizontal folding line 20 to a carton blanks 4 forming the paper container are set. A virtual point P is set at a position below the first virtual line L1 on the second virtual line L2. A second top horizontal folding line 14 is formed into a curve that passes through the virtual point P and connects the upper ends 9a and 9b of the trunk part vertical folding line 9 on both sides of the trunk part left and right side panels 6 and 8.SELECTED DRAWING: Figure 1

Description

本発明は、牛乳やジュース等の液体飲料を収容するフラットトップ型頂部を有する紙容器（レンガ型の紙容器を含む。）に関する。 The present invention relates to a paper container (including a brick-shaped paper container) having a flat-top type top for accommodating liquid beverages such as milk and juice.

従来、牛乳やジュース等の液体飲料を収容する紙容器として、一枚のカートンブランクスから形成され、４つの胴部パネルを備え、縦方向シールパネルのシールによって矩形の筒状に形成された胴部の上に、一対の頂面パネルと、側面に折り畳まれる一対の側面パネルにより構成される頂部を有し、前記胴部の下に一対の底面パネルと、その内側に折り込まれる一対の内面パネルにより構成される底部を有するフラットトップ型の紙容器が広く使用されている（例えば特許文献１，２参照。）。 Conventionally, as a paper container for storing liquid beverages such as milk and juice, the body is formed of a single carton blank, has four body panels, and is formed into a rectangular cylinder by the seal of the vertical seal panel. It has a top composed of a pair of top panels and a pair of side panels that are folded to the sides, and a pair of bottom panels and a pair of inner panels that are folded inward under the body. Flat-top type paper containers having a configured bottom are widely used (see, for example, Patent Documents 1 and 2).

この種の紙容器は、図９に示すようなカートンブランクス５１から形成され、その頂部５２にあっては、一対の頂面パネル５３と一対の側面パネル５４及びトップシールパネル５５とから形成される。具体的には、まず、トップシールパネル５５を貼り合わせて頂部５２を封止し、一対の側面パネル５４を折り畳み、三角形のフラップ５６を形成し、そして、その形成したフラップ５６を紙容器の筒状胴部５７の側面に折り畳んで接着することにより図１０に示すような平坦かつフラップ５６を有する頂部５２を有する紙容器が形成される。 This type of paper container is formed from a carton blank 51 as shown in FIG. 9, and the top 52 thereof is formed from a pair of top panels 53, a pair of side panels 54, and a top seal panel 55. .. Specifically, first, the top seal panel 55 is bonded to seal the top 52, the pair of side panels 54 are folded to form a triangular flap 56, and the formed flap 56 is used as a cylinder of a paper container. By folding and adhering to the side surface of the body portion 57, a paper container having a top portion 52 which is flat and has a flap 56 as shown in FIG. 10 is formed.

特開２０１７−２４７４１号公報JP-A-2017-24741 特開２０１６−１６９０２５号公報Japanese Unexamined Patent Publication No. 2016-169025

上記のように形成されるフラットトップ型紙容器のフラップは、折り畳まれて重ねられた側面パネルと、紙容器の頂部を封止するために貼り合わされたトップシールパネルの、カートンブランクスの４枚分の厚さを有するのに加えて、フラップの折り曲げ位置と紙容器の胴部の側面が上下に並ぶため、フラップの折り曲げに胴部の側面が緩衝し、フラップは側面への折り畳みに対する強い反発力が生じる。そのため、フラップが接着された胴部の側面パネルはフラップの反発力により左右方向に引っ張られて紙容器に胴膨れが生じる。また、フラップは胴膨れした胴部の側面に沿った外側への反りが生じる。このような、紙容器の胴膨れやフラップの反りが生じると、運搬時や陳列時に紙容器が余計なスペースを取るので、効率的な作業を行えないといった問題がある。また、反りが生じたフラップが他の紙容器やケースに引っかかるなどするため、作業をスムーズに行えないといった問題がある。 The flaps of the flat-top paper container formed as described above are equivalent to four carton blanks, a side panel that is folded and stacked, and a top seal panel that is attached to seal the top of the paper container. In addition to having thickness, the folding position of the flap and the side of the body of the paper container are lined up and down, so the side of the body is buffered by the bending of the flap, and the flap has a strong repulsive force against folding to the side. Occurs. Therefore, the side panel of the body portion to which the flap is adhered is pulled in the left-right direction by the repulsive force of the flap, and the body swells in the paper container. In addition, the flap warps outward along the side surface of the bulging body. When the body of the paper container is swollen or the flap is warped, the paper container takes up extra space during transportation and display, which causes a problem that efficient work cannot be performed. Further, since the warped flap is caught in another paper container or case, there is a problem that the work cannot be performed smoothly.

また、このような紙容器の胴膨れやフラップの反りにより、紙容器の意匠性が著しく損なわれるといった問題がある。 Further, there is a problem that the design of the paper container is significantly impaired due to the swelling of the body of the paper container and the warp of the flap.

本発明の目的は、フラップの折り曲げに対する反発力を小さくして、紙容器の胴膨れやフラップの反り返りを抑え、効率的でスムーズな保管・搬送作業を行うことができ、かつ、意匠性に優れた紙容器を提供することにある。 An object of the present invention is to reduce the repulsive force against bending of the flap, suppress the swelling of the paper container and the warp of the flap, perform efficient and smooth storage / transport work, and have excellent design. The purpose is to provide a paper container.

上記の目的を達成するために、請求項１に記載の発明は、四角の筒状胴部を形成するところの胴部縦折線を介して連接している胴部正面パネルと胴部左右側面パネルと胴部背面パネルとを有し、頂部を形成するところの前記胴部正面パネル及び前記胴部背面パネルに第１頂部横折線を介して連接する一対の頂面パネルと、前記胴部左右側面パネルに第２頂部横折線を介して連接する一対の側面パネルと、前記一対の頂面パネルに第１トップシール横折線を介して連接する一対の第１トップシールパネルと、前記一対の側面パネルに第２トップシール横折線を介して連接する一対の第２トップシールパネルを有し、前記一対の側面パネルには前記第２トップシールパネル横折線の中点から前記第２頂部横折線の両端を結ぶ傾斜罫線が形成され、前記第２トップシールパネルには前記第２トップシールパネルの上端から垂下して前記第２トップシールパネル横折線の中点に渡る側面トップシール縦折線が形成されたカートンブランクスから形成され、前記側面トップシールパネルを山折りして第１トップシールパネル及び第２トップシールパネルの対向面を貼り合わせて頂部を封止し、前記傾斜罫線を折り込み前記側面パネルから略三角形状のフラップを形成し、前記フラップを前記筒状胴部の左右の側面に折り畳んで平坦な頂部が形成される紙容器であって、前記カートンブランクスには、前記胴部左右側面パネルの両側の前記胴部縦折線の上端同士を直線で結ぶ第１仮想線と、前記第２トップシール横折線の中点を起点に伸びて前記第１仮想線と直交する第２仮想線が設定され、前記第２仮想線上の前記第１仮想線よりも下方の位置に仮想点が設定され、前記第２頂部横折線は、前記仮想点を通過して前記胴部左右側面パネルの両側の前記胴部縦折線の上端同士を結ぶ曲線に形成されていることを特徴とする。 In order to achieve the above object, the invention according to claim 1 is a body front panel and a body left and right side panels which are connected via a body vertical folding line where a square tubular body is formed. A pair of top panels and the left and right side surfaces of the body, which are connected to the front panel of the body and the back panel of the body through a first top horizontal fold line. A pair of side panels connected to the panel via a second top horizontal fold line, a pair of first top seal panels connected to the pair of top panels via a first top seal horizontal fold line, and the pair of side panels. Has a pair of second top seal panels connected via a second top seal horizontal fold line, and the pair of side panels have both ends of the second top horizontal fold line from the middle point of the second top seal panel horizontal fold line. An inclined ruled line connecting the two top seal panels was formed, and a side top seal vertical fold line hanging from the upper end of the second top seal panel and extending to the middle point of the second top seal panel horizontal fold line was formed on the second top seal panel. Formed from carton blanks, the side surface top seal panel is folded in a mountain shape, the facing surfaces of the first top seal panel and the second top seal panel are bonded together to seal the top, and the inclined rule line is folded in to omit from the side panel. A paper container in which a triangular flap is formed and the flap is folded on the left and right side surfaces of the tubular body portion to form a flat top. The carton blanks are provided on both sides of the body portion left and right side panels. A first virtual line connecting the upper ends of the body vertical folding line with a straight line and a second virtual line extending from the midpoint of the second top seal horizontal folding line and orthogonal to the first virtual line are set. A virtual point is set at a position below the first virtual line on the second virtual line, and the second top cross-fold line passes through the virtual point and the body portions on both sides of the left and right side panel of the body portion. It is characterized in that it is formed in a curved line connecting the upper ends of vertical folding lines.

請求項１に記載の発明によれば、前記カートンブランクスには、前記胴部左右側面パネルの両側の前記胴部縦折線の上端同士を直線で結ぶ第１仮想線と、前記第２トップシール横折線の中点を起点に伸びて前記第１仮想線と直交する第２仮想線が設定され、前記第２仮想線上の前記第１仮想線よりも下方の位置に仮想点が設定され、前記第２頂部横折線は、前記仮想点を通過して前記胴部左右側面パネルの両側の前記胴部縦折線の上端同士を結ぶ曲線に形成されているので、フラップを形成したときに前記第２頂部横折線は前記第１仮想線から離れた分だけ、紙容器の内側に入り込み、前記胴部左右パネルが紙容器の内側に押し込まれて湾曲する。また、胴部左右パネルの上端である前記第２頂部横折線は、形成された前記フラップを紙容器の側面へ折り畳む際に山折りされる前記頂部縦折線及び前記トップシール縦折線よりも紙容器の内側に位置する。これにより、前記フラップに生じる折り畳みに対する反発力を低減することができ、紙容器の胴膨れを効果的に抑えることができる。 According to the invention of claim 1, the carton blanks include a first virtual line connecting the upper ends of the body vertical folding lines on both sides of the body left and right side panels with a straight line, and a side of the second top seal. A second virtual line extending from the midpoint of the polygonal line and orthogonal to the first virtual line is set, and a virtual point is set at a position below the first virtual line on the second virtual line. Since the two top horizontal fold lines are formed in a curve that passes through the virtual point and connects the upper ends of the body vertical fold lines on both sides of the left and right side panels of the body, the second top is formed when the flap is formed. The horizontal folding line enters the inside of the paper container by the amount away from the first virtual line, and the left and right panels of the body are pushed into the inside of the paper container and curved. Further, the second top horizontal fold line, which is the upper end of the left and right panels of the body, is a paper container rather than the top vertical fold line and the top seal vertical fold line, which are mountain-folded when the formed flap is folded to the side surface of the paper container. Located inside. As a result, the repulsive force against folding generated in the flap can be reduced, and the swelling of the paper container can be effectively suppressed.

請求項２に記載の発明は、請求項１に記載の、前記第２頂部縦折線は、前記仮想点で屈曲する曲線であることを特徴とする。 The invention according to claim 2 is characterized in that the second top vertical folding line according to claim 1 is a curve that bends at the virtual point.

請求項２に記載の発明によれば、前記第２頂部縦折線は、前記仮想点で屈曲する曲線であることから、前記胴部左右側面パネルの両端の前記胴部縦折線の上端と前記仮想点を結ぶ罫線を形成することにより、前記仮想点を通過する曲線である前記第２頂部横折線を容易に且つ確実に形成することができる。 According to the second aspect of the present invention, since the second top vertical fold line is a curve that bends at the virtual point, the upper ends of the body vertical fold lines at both ends of the left and right side panels of the body and the virtual line. By forming the ruled line connecting the points, the second top horizontal folding line, which is a curve passing through the virtual point, can be easily and surely formed.

請求項３に記載の発明は、請求項１に記載の、前記第２頂部縦折線は、前記仮想点を通過する円弧状線であることを特徴とする。 The invention according to claim 3 is characterized in that the second top vertical folding line according to claim 1 is an arcuate line passing through the virtual point.

請求項３に記載の発明によれば、前記第２頂部縦折線は、前記仮想点を通過する円弧状線であることから、前記胴部左右側面パネルの両端の前記胴部縦折線の上端の一方から他方へ前記仮想点を通過する円弧状の罫線を形成することにより、前記仮想点を通過する曲線である前記第２頂部横折線を容易に且つ確実に形成することができる。 According to the third aspect of the present invention, since the second top vertical fold line is an arcuate line passing through the virtual point, the upper ends of the body vertical fold lines at both ends of the left and right side panels of the body. By forming an arc-shaped ruled line passing through the virtual point from one side to the other, the second top cross-folding line, which is a curve passing through the virtual point, can be easily and surely formed.

請求項４に記載の発明は、請求項１から３のいずれか１項に記載の、前記第１仮想線から前記仮想点までの距離は１ｍｍ以上４ｍｍ以下であることを特徴とする。 The invention according to claim 4 is characterized in that the distance from the first virtual line to the virtual point according to any one of claims 1 to 3 is 1 mm or more and 4 mm or less.

請求項４に記載の発明によれば、前記第１仮想線から前記仮想点までの距離は１ｍｍ以上であることから、前記フラップを折り曲げたときに、紙容器の胴膨れを確実に抑えることができる程度に前記胴部左右側面パネルを内側に押し込み湾曲させることができる。また、前記第１仮想線から前記仮想点までの距離は４ｍｍ以下であることから、前記胴部左右側面パネルを紙容器の内側に過度に押し込み、紙容器に歪みが生じたり、成形が困難になったり、意匠性が損なわれたりするといった事態を防ぐことができる。 According to the invention of claim 4, since the distance from the first virtual line to the virtual point is 1 mm or more, it is possible to reliably suppress the swelling of the paper container when the flap is bent. The left and right side panels of the body can be pushed inward and curved to the extent possible. Further, since the distance from the first virtual line to the virtual point is 4 mm or less, the left and right side panels of the body portion are excessively pushed into the inside of the paper container, which causes distortion of the paper container and makes molding difficult. It is possible to prevent a situation in which the design becomes poor or the design is impaired.

請求項５に記載の発明は、請求項１から４のいずれか１項に記載の、前記第２頂部横折線は、側面に折り畳まれる前記フラップに覆われる範囲に形成されていることを特徴とする。 The invention according to claim 5 is characterized in that the second top horizontal folding line according to any one of claims 1 to 4 is formed in a range covered by the flap folded to the side surface. To do.

請求項５に記載の発明によれば、前前記第２頂部横折線は、側面に折り畳まれる前記フラップに覆われる範囲に形成されているので、成形された紙容器の外面に前記第２頂部横折線が外面に表れず、紙容器の意匠性が損なわれることを防ぐことができる。 According to the invention of claim 5, since the front second top horizontal folding line is formed in a range covered by the flap folded to the side surface, the second top lateral folding line is formed on the outer surface of the molded paper container. It is possible to prevent the folding line from appearing on the outer surface and impairing the design of the paper container.

請求項６に記載の発明は、請求項１から５のいずれか１項に記載の、前記胴部左右側面パネルには、前記第２頂部横折線から下方に伸びる折り曲げ補助線が単数又は複数形成されていることを特徴とする。 The invention according to claim 6 has one or a plurality of bending auxiliary lines extending downward from the second top horizontal folding line on the left and right side panels of the body according to any one of claims 1 to 5. It is characterized by being done.

請求項６に記載の発明によれば、前記胴部左右側面パネルには、前記第２頂部横折線から下方に伸びる折り曲げ補助線が単数又は複数形成されているので、前記フラップを形成したときに、前記胴部左右側面パネルに形成された折り曲げ補助線が折り曲がり、前記胴部左右側面パネルを容易に紙容器内側に湾曲させることができる。 According to the invention of claim 6, since the left and right side panels of the body portion are formed with one or more auxiliary bending lines extending downward from the second top horizontal folding line, when the flaps are formed. , The bending auxiliary line formed on the left and right side panels of the body is bent, and the left and right side panels of the body can be easily curved inside the paper container.

請求項７に記載の発明は、請求項６に記載の、前記折り曲げ補助線は、前記第２仮想線と平行となるように形成されていることを特徴とする。 The invention according to claim 7 is characterized in that the bending auxiliary line according to claim 6 is formed so as to be parallel to the second virtual line.

請求項７に記載の発明によれば、前記折り曲げ補助線は、前記第２仮想線と平行となるように形成されているので、前記折り曲げ補助線の形成方向が前記フラップを折り畳んだときの力の方向となることから、紙容器の前記胴部左右側面パネルを紙容器の内側へ容易に湾曲させることができる。 According to the invention of claim 7, since the bending auxiliary line is formed so as to be parallel to the second virtual line, the forming direction of the bending auxiliary line is the force when the flap is folded. Therefore, the left and right side panels of the body of the paper container can be easily curved inward of the paper container.

請求項８に記載の発明は、請求項６又は７に記載の、前記折り曲げ補助線の内の少なくとも一本は、前記第２仮想線上に形成されていることを特徴とする。 The invention according to claim 8 is characterized in that at least one of the bending auxiliary lines according to claim 6 or 7 is formed on the second virtual line.

請求項８に記載の発明によれば、前記折り曲げ補助線の内の少なくとも一本は、前記第２仮想線上に形成されているので、折り曲げ補助線３０はフラップ３１の折り曲げ時に力がかかる仮想点Ｐを起点に下方に伸びた形状となり、紙容器の前記胴部左右側面パネルを紙容器の内側へ容易に湾曲させることができる。 According to the invention of claim 8, since at least one of the bending auxiliary lines is formed on the second virtual line, the bending auxiliary line 30 is a virtual point to which a force is applied when the flap 31 is bent. The shape extends downward starting from P, and the left and right side panels of the body of the paper container can be easily curved inward of the paper container.

本願の発明によれば、フラップの折り曲げに対する反発力を小さくして、紙容器の胴膨れやフラップの反り返りを抑え、効率的でスムーズな保管・搬送作業を行うことができ、かつ、意匠性に優れた紙容器を得ることができる。 According to the invention of the present application, the repulsive force against bending of the flap is reduced, the swelling of the paper container and the warping of the flap are suppressed, and efficient and smooth storage / transportation work can be performed, and the design is improved. An excellent paper container can be obtained.

本発明に係る紙容器の実施の形態の第１例のカートンブランクスを示す展開図である。It is a developed view which shows the carton blanks of the 1st example of the Embodiment of the paper container which concerns on this invention. 第１例の紙容器の第２頂部横折線の他例を示す展開図である。It is a developed view which shows another example of the 2nd top horizontal folding line of the paper container of 1st example. 図１に示すカートンブランクスから形成した筒体を示す一部省略拡大斜視図である。It is a partially omitted enlarged perspective view which shows the cylinder formed from the carton blanks shown in FIG. 図３に示す筒体からフラップを形成した状態を示す平面図である。It is a top view which shows the state which the flap was formed from the cylinder shown in FIG. 図４に示す状態からフラップを折り畳み、紙容器を形成した状態を示す正面図である。It is a front view which shows the state which folded the flap from the state shown in FIG. 4, and formed the paper container. 本発明に係る紙容器の実施の形態の第２例のカートンブランクスを示す展開図である。It is a developed view which shows the carton blanks of the 2nd example of the embodiment of the paper container which concerns on this invention. 第２例の紙容器のフラップを形成した状態を示す平面図である。It is a top view which shows the state which formed the flap of the paper container of 2nd example. 図７に示す状態からフラップを折り畳み、紙容器を形成した状態を示す正面図である。It is a front view which shows the state which folded the flap from the state shown in FIG. 7 and formed the paper container. 従来の紙容器のカートンブランクスを示す展開図である。It is a developed view which shows the carton blanks of the conventional paper container. 従来の紙容器を示す正面図である。It is a front view which shows the conventional paper container.

以下、本発明に係る紙容器の実施の形態を、図面を参照して詳細に説明する。
図１乃至図５は本発明に係る紙容器の実施の形態の第１例を示し、図１は本発明に係る紙容器の実施の形態の第１例のカートンブランクスを示す展開図、図２は第１例の紙容器の第２頂部横折線の他例を示す展開図、図３は図１に示すカートンブランクスから形成した筒体を示す一部省略拡大斜視図、図４は図３に示す筒体からフラップを形成した状態を示す平面図、図５は図４に示す状態からフラップを折り畳み、紙容器を形成した状態を示す正面図である。 Hereinafter, embodiments of the paper container according to the present invention will be described in detail with reference to the drawings.
1 to 5 show a first example of the embodiment of the paper container according to the present invention, and FIG. 1 is a development view showing the carton blanks of the first example of the embodiment of the paper container according to the present invention. Is a developed view showing another example of the second top horizontal folding line of the paper container of the first example, FIG. 3 is a partially omitted enlarged perspective view showing a cylinder formed from the carton blanks shown in FIG. 1, and FIG. 4 is shown in FIG. A plan view showing a state in which a flap is formed from the tubular body shown, and FIG. 5 is a front view showing a state in which the flap is folded from the state shown in FIG. 4 to form a paper container.

第１例の紙容器は、横断面四角形の筒状胴部１と平坦に形成された頂部２と底部３とを有し、図１に示すカートンブランクス４から形成される。カートンブランクス４は表裏両面に熱可塑性樹脂層が積層された紙基材からなり、熱溶着により所定箇所を接着して紙容器が形成される。 The paper container of the first example has a tubular body portion 1 having a quadrangular cross section, a flat top portion 2 and a bottom portion 3, and is formed from the carton blanks 4 shown in FIG. The carton blanks 4 are made of a paper base material on which thermoplastic resin layers are laminated on both the front and back surfaces, and a paper container is formed by adhering a predetermined portion by heat welding.

カートンブランクス４は、断面四角の筒状胴部１を形成する胴部正面パネル５、胴部左側面パネル６，胴部背面パネル７，胴部右側面パネル８を有している。各胴部パネルは同部縦折線９を介して連接している。また、胴部右側面パネル８の解放側端縁には縦方向シールパネル１０が設けられ、後述する紙容器の成形時には、縦方向シールパネル１０を胴部左側面パネル７に接着することにより、カートンブランクス４から筒体を形成する。
なお、第１例では胴部正面パネル５よりも胴部背面パネル７の高さが高く形成されており、後述する紙容器の頂部２は平坦な傾斜面に形成されるが、頂部２の形状は傾斜面に限られるものではなく、胴部正面パネル５と胴部背面パネル７を同じ高さに形成して、頂部を傾斜のない水平面に形成してもよい。 The carton blanks 4 have a body front panel 5, a body left side panel 6, a body back panel 7, and a body right side panel 8 that form a tubular body 1 having a square cross section. Each body panel is connected via a vertical folding line 9 of the same portion. Further, a vertical seal panel 10 is provided on the open side edge of the body right side panel 8, and when the paper container described later is molded, the vertical seal panel 10 is adhered to the body left side panel 7. A cylinder is formed from the carton blanks 4.
In the first example, the height of the body back panel 7 is formed higher than that of the body front panel 5, and the top 2 of the paper container described later is formed on a flat inclined surface, but the shape of the top 2 is formed. Is not limited to the inclined surface, and the body front panel 5 and the body back panel 7 may be formed at the same height, and the top may be formed on a horizontal surface without inclination.

また、カートンブランクス４は、頂部２を形成する一対の頂面パネル１１と一対の側面パネル１２を有する。一対の頂面パネル１１は第１頂部横折線１３を介して同部正面パネル５・胴部背面パネル７と連接し、一対の側面パネル１２は第２頂部横折線１４を介して胴部左右側面パネル６，８と連接している。一対の頂面パネル１１と一対の側面パネルは頂部縦折線１５を介して、相互に連接している。また、一対の側面パネル１２には、後述する第２トップシール横折線の中点から第２頂部横折線１４の両端を結ぶ傾斜罫線１６が形成されている。
なお、第１例では一対の頂面パネル１１の内、胴部正面パネル５と連接する正面側のパネルに、カートンブランクス４を打ち抜き加工した開口部１７が形成されている。開口部１７には後述する紙容器の成形時に口栓が取り付けられる。また、第１例では開口部１６は、アルミやガスバリア性の高い樹脂フィルム（図示せず）で被覆する。また、第１例の開口部１６の代わりにカートンブランクス４をハーフカットした易開封部を形成してもよい。 Further, the carton blanks 4 has a pair of top panels 11 and a pair of side panels 12 forming the top 2. The pair of top panels 11 are connected to the front panel 5 and the back panel 7 of the body portion via the first top cross-fold line 13, and the pair of side panels 12 are connected to the left and right side surfaces of the body portion via the second top cross-fold line 14. It is connected to panels 6 and 8. The pair of top panels 11 and the pair of side panels are connected to each other via a top vertical folding line 15. Further, the pair of side panels 12 are formed with inclined ruled lines 16 connecting both ends of the second top horizontal folding line 14 from the midpoint of the second top seal horizontal folding line, which will be described later.
In the first example, of the pair of top panel 11, an opening 17 formed by punching the carton blanks 4 is formed in the panel on the front side which is connected to the body front panel 5. A spout is attached to the opening 17 when molding a paper container described later. Further, in the first example, the opening 16 is covered with aluminum or a resin film having a high gas barrier property (not shown). Further, instead of the opening 16 of the first example, an easy-opening portion may be formed by half-cutting the carton blanks 4.

また、一対の頂面パネル１１には、その上端に形成された第１トップシール横折線１８を介して第１トップシールパネル１９が設けられており、一対の側面パネル１２には、その上端に形成された第２トップシール横折線２０を介して第２トップシールパネル２１が設けられている。第１トップシールパネル１９と第２トップシールパネル２１はトップシール縦折線２２を介して相互に連接している。また、第２トップシールパネル２１には、紙容器の頂部の封止時に山折りされる側面トップシールパネル縦折線２３が、第２トップシールパネル２１の上端から垂下して第２トップシール横折線２０の中点２４に渡って形成されている。 Further, the pair of top panels 11 are provided with the first top seal panel 19 via the first top seal horizontal folding line 18 formed at the upper end thereof, and the pair of side panels 12 are provided at the upper end thereof. The second top seal panel 21 is provided via the formed second top seal horizontal folding line 20. The first top seal panel 19 and the second top seal panel 21 are connected to each other via the top seal vertical folding line 22. Further, on the second top seal panel 21, a side top seal panel vertical folding line 23, which is folded in a mountain when the top of the paper container is sealed, hangs down from the upper end of the second top seal panel 21 and is a second top seal horizontal folding line. It is formed over 20 midpoints 24.

さらに、カートンブランクス４は、底部３を形成する、一対の外側底面パネル２５と一対の内側底面パネル２６を有している。一対の外側底面パネル２５は第１底部横折線２７
を介して胴部正面パネル５・胴部背面パネル７と連接し、一対の内側底面パネル２６は第２底部横折線２８を介して胴部左右側面パネル６，８と連接している。一対の底部外側パネル２５と一対の底部内側パネル２６は底部縦折線２９を介して相互に連接している。
なお、底部３の構成は第１例の構成に限られず、紙容器の底部を形成する他の公知の構成にすることもできる。 Further, the carton blanks 4 have a pair of outer bottom panels 25 and a pair of inner bottom panels 26 that form the bottom 3. The pair of outer bottom panels 25 is the first bottom horizontal folding line 27.
The body front panel 5 and the body back panel 7 are connected to each other, and the pair of inner bottom panels 26 are connected to the body left and right side panels 6 and 8 via the second bottom horizontal folding line 28. The pair of bottom outer panels 25 and the pair of bottom inner panels 26 are connected to each other via a bottom vertical folding line 29.
The configuration of the bottom portion 3 is not limited to the configuration of the first example, and other known configurations that form the bottom portion of the paper container may be used.

このように構成されたカートブランクス４では、図１に示すように、胴部左右側面パネル６，８の両側の胴部縦折線９の上端９ａ、９ｂ同士を直線で結ぶ第１仮想線Ｌ１を設定している。また、第２トップシール横折線２０の中点２４を起点に伸びて第１仮想線Ｌ１と直交する第２仮想線Ｌ２を設定している。そして、２仮想線Ｌ２上の第１仮想線Ｌ１よりも底部４側の位置に仮想点Ｐを設定している。仮想点Ｐの位置は特に限定されないが、第１仮想線Ｌ１から１ｍｍ以上４ｍｍ以下離れた位置に設定することが好ましい。第１仮想線Ｌ１から１ｍｍ以上離れた位置であれば、後述する紙容器の成形においてフラップを折り曲げたときに、紙容器の胴膨れを確実に抑えることができる程度に胴部左右側面パネル６，８を内側に押し込み湾曲させることができるので好適である。また、仮想点Ｐの第１仮想線Ｌ１からの距離を４ｍｍ以下とすることにより、胴部左右側面パネル６，８を内側に過度に押し込んで、紙容器に歪みが生じたり、紙容器の成形が困難になったり、意匠性が損なわれたりするといった事態を防ぐことができる。 In the cart blanks 4 configured in this way, as shown in FIG. 1, a first virtual line L1 connecting the upper ends 9a and 9b of the body vertical folding lines 9 on both sides of the body left and right side panels 6 and 8 with a straight line is formed. It is set. Further, a second virtual line L2 extending from the midpoint 24 of the second top seal horizontal turn line 20 and orthogonal to the first virtual line L1 is set. Then, the virtual point P is set at a position on the bottom 4 side of the first virtual line L1 on the 2 virtual line L2. The position of the virtual point P is not particularly limited, but it is preferable to set the position at a distance of 1 mm or more and 4 mm or less from the first virtual line L1. If the position is 1 mm or more away from the first virtual line L1, the left and right side panels 6 and the body portion can surely suppress the swelling of the body of the paper container when the flap is bent in the molding of the paper container described later. It is preferable because 8 can be pushed inward and curved. Further, by setting the distance of the virtual point P from the first virtual line L1 to 4 mm or less, the left and right side panels 6 and 8 of the body portion are excessively pushed inward, causing distortion in the paper container and molding of the paper container. It is possible to prevent a situation in which the design becomes difficult or the design is impaired.

そして、上述した第２頂部横折線１４を仮想点Ｐを通過して胴部左右側面パネル６，８の両側の胴部縦折線９の上端９ａ、９ｂ同士を結ぶ曲線に形成している。第１例では、第２頂部横折線１４を胴部縦折線９の上端９ａ，９ｂと仮想点Ｐを直線で結び、仮想点Ｐで屈曲する屈曲線に形成している。
また、このように曲線に形成した第２頂部横折線１４は、紙容器の意匠性を損なわないように、後述する紙容器の成形時に側面に折り畳まれるフラップに覆われる範囲に形成されることが望ましい。
なお、第２頂部横折線９の屈曲線の形状は、胴部縦折線９の上端９ａ，９ｂと仮想点Ｐを直線で結んだものに限られず、仮想点Ｐで屈曲するものであれば特に限定されず、例えば図２に示すように、屈曲線を胴部縦折線９の上端９ａまたは上端９ｂと仮想点Ｐを結ぶ曲率の異なる２本の下向き円弧線により形成してもよい。 Then, the second top horizontal fold line 14 described above passes through the virtual point P and is formed into a curve connecting the upper ends 9a and 9b of the body vertical fold lines 9 on both sides of the body left and right side panel 6 and 8. In the first example, the second top horizontal folding line 14 is formed by connecting the upper ends 9a and 9b of the body vertical folding line 9 and the virtual point P with a straight line to form a bending line that bends at the virtual point P.
Further, the second top horizontal folding line 14 formed in a curved line in this way may be formed in a range covered by a flap that is folded to the side surface during molding of the paper container, which will be described later, so as not to impair the design of the paper container. desirable.
The shape of the bending line of the second top horizontal folding line 9 is not limited to the one connecting the upper ends 9a and 9b of the body vertical folding line 9 and the virtual point P with a straight line, and is particularly limited to the one that bends at the virtual point P. Not limited to this, for example, as shown in FIG. 2, the bending line may be formed by two downward arc lines having different curvatures connecting the upper end 9a or the upper end 9b of the body vertical folding line 9 and the virtual point P.

また、第１例では、胴部左右側面パネル６，８の上部に、第２頂部横折線１４から下方に伸びる折り曲げ補助線３０が複数形成されている。なお、折り曲げ補助線３０の数は単数であってもよい。折り曲げ補助線３０は、後述する紙容器の成形時に胴部左右側面パネル６，８が容易に湾曲するように、フラップを折り曲げたときの力の方向に沿った第２仮想線Ｌ２と平行となるように形成することが好ましい。また、折り曲げ補助線３０のうちの１本は第２仮想線Ｌ２上に形成している。このことにより、フラップの折り曲げ時に大きく力がかかる中点２４から力の方向に沿った折り曲げ補助線３０を形成することができ、胴部左右側面パネル６，８をより容易に湾曲させることができる。 Further, in the first example, a plurality of bending auxiliary lines 30 extending downward from the second top horizontal folding line 14 are formed on the upper portions of the left and right side panels 6 and 8 of the body portion. The number of bending auxiliary lines 30 may be singular. The bending auxiliary line 30 is parallel to the second virtual line L2 along the direction of the force when the flap is bent so that the left and right side panels 6 and 8 of the body portion are easily curved during molding of the paper container described later. It is preferable to form the above. Further, one of the bending auxiliary lines 30 is formed on the second virtual line L2. As a result, it is possible to form a bending auxiliary line 30 along the direction of the force from the midpoint 24 where a large force is applied when the flap is bent, and the body left and right side panels 6 and 8 can be bent more easily. ..

このように構成したカートンブランクス４から紙容器の成形は、まず、縦方向シールパネル１０と胴部背面パネル７を貼り合わせて筒体を形成する（図３参照。）。この状態から側面トップシール縦折線２３を山折りし、一対の第１トップシールパネル１９の対向面を貼り合わせ、また折り曲げられた各第２トップシールパネルの内面を貼り合わせて筒体の頂部を封止する。そして、第１頂部横折線１３と傾斜罫線１６を山折りし、第２頂部横折線１４を谷折りし、図４に示すように、三角形状のフラップ３１を形成する。このとき、第２頂部横折線１４は第１仮想線Ｌ１よりも離れた分だけ、紙容器の内側に入り込み、胴部左右パネル６，８は紙容器の内側に押し込まれて湾曲する。そして、胴部左右パネル６，８の上端である第２頂部横折線１４は、形成されたフラップ３１を側面へ折り畳む際の折り曲げ位置Ｆとなる頂部縦折線１５及びトップシール縦折線２２の位置よりも紙容器の内側に位置することになる。 In the molding of the paper container from the carton blanks 4 configured in this way, first, the vertical seal panel 10 and the body back panel 7 are laminated to form a cylinder (see FIG. 3). From this state, the side top seal vertical folding line 23 is folded in a mountain shape, the facing surfaces of the pair of first top seal panels 19 are bonded together, and the inner surfaces of the bent second top seal panels are bonded together to form the top of the cylinder. Seal. Then, the first top horizontal fold line 13 and the inclined ruled line 16 are mountain-folded, and the second top horizontal fold line 14 is valley-folded to form a triangular flap 31 as shown in FIG. At this time, the second top horizontal folding line 14 enters the inside of the paper container by a distance from the first virtual line L1, and the left and right panels 6 and 8 of the body are pushed into the inside of the paper container and curved. The second top horizontal fold line 14, which is the upper end of the body left and right panels 6 and 8, is from the position of the top vertical fold line 15 and the top seal vertical fold line 22, which are the folding positions F when the formed flap 31 is folded to the side surface. Will also be located inside the paper container.

また、第１例では、複数の折り曲げ補助線３０を形成していることから胴部左右パネル６，８を容易に湾曲させることができる。また、第１例の折り曲げ補助線３０は第２仮想線Ｌ２と平行となるように形成したので、折り曲げ補助線３０の形成方向がフラップ３１を折り畳んだときの力の方向となることから、紙容器の胴部左右側面パネル６，８を紙容器の内側へより容易に湾曲させることができる。さらに、折り曲げ補助線３０の内の少なくとも一本を第２仮想線上Ｌ２に形成したので、折り曲げ補助線３０はフラップ３１の折り曲げ時に力がかかる仮想点Ｐを起点に下方に伸びた形状となり、紙容器の胴部左右側面パネル６，８を紙容器の内側へより容易に湾曲させることができる。 Further, in the first example, since the plurality of bending auxiliary lines 30 are formed, the body left and right panels 6 and 8 can be easily curved. Further, since the bending auxiliary line 30 of the first example is formed so as to be parallel to the second virtual line L2, the forming direction of the bending auxiliary line 30 is the direction of the force when the flap 31 is folded. The left and right side panels 6 and 8 of the body of the container can be more easily curved inward of the paper container. Further, since at least one of the bending auxiliary lines 30 is formed on the second virtual line L2, the bending auxiliary line 30 has a shape extending downward from the virtual point P to which a force is applied when the flap 31 is bent. The left and right side panels 6 and 8 of the body of the container can be more easily curved inward of the paper container.

この状態から、頂部縦折線１５及びトップシール縦折線２２を山折りしてフラップ３１を紙容器の側面に折り畳み胴部左右側面パネル６，８に接着する。このとき、フラップ３１の折り曲げ位置Ｆよりも第２頂部横折線１４が紙容器の内側に入り込むので、フラップ３１の折り曲げに胴部左右側面パネル６，８が緩衝せず、フラップ３１の折り曲げに対する反発力を抑えて容易に折り畳むことができる。また、フラップ３１の折り曲げ位置Ｆと胴部左右側面パネル６，８との間には、第２頂部横折線１４が紙容器に入り込んだ分だけの間隔ができるので、その間隔の分だけ、フラップ３１を従来の紙容器よりも深く折り曲げることができる。そして、フラップ３１を接着する胴部左右側面パネル６，８は紙容器の内側に入り込むように湾曲し、接着されたフラップ３１の反発力に対する抵抗力を有している。
これにより、胴部左右側面パネル６，８は胴膨れせず、図５に示すようにフラップ３１を紙容器の頂部２から略９０°折り曲げて、垂下した形状にすることができる。 From this state, the top vertical folding line 15 and the top seal vertical folding line 22 are mountain-folded, the flap 31 is folded on the side surface of the paper container, and the flap 31 is adhered to the left and right side panel 6 and 8 of the body portion. At this time, since the second top horizontal folding line 14 enters the inside of the paper container from the folding position F of the flap 31, the left and right side panels 6 and 8 of the body do not buffer the bending of the flap 31, and the flap 31 repels the bending. It can be easily folded with less force. Further, since there is a space between the folding position F of the flap 31 and the left and right side panels 6 and 8 of the body portion as much as the second top horizontal folding line 14 enters the paper container, the flap is separated by the distance. 31 can be bent deeper than a conventional paper container. The left and right side panels 6 and 8 of the body to which the flaps 31 are adhered are curved so as to enter the inside of the paper container, and have resistance to the repulsive force of the adhered flaps 31.
As a result, the left and right side panels 6 and 8 of the body do not bulge, and as shown in FIG. 5, the flap 31 can be bent by approximately 90 ° from the top 2 of the paper container to form a hanging shape.

そして、第２底部横折線２８を折り曲げて内側底面パネル２６を折り込み、それから第１底部横折線２７を折り曲げて外側底面パネル２５を、折り込まれた内側底面パネル２６を覆うようにして重ねて接着することにより底部３を形成し、紙容器を形成する。 Then, the second bottom horizontal folding line 28 is bent to fold the inner bottom panel 26, and then the first bottom horizontal folding line 27 is bent to overlap and bond the outer bottom panel 25 so as to cover the folded inner bottom panel 26. As a result, the bottom portion 3 is formed and a paper container is formed.

このように構成した第１例の紙容器によれば、カートンブランクス４には、胴部左右側面パネル６，８の両側の胴部縦折線９の上端９ａ，９ｂ同士を直線で結ぶ第１仮想線Ｌ１と、第２トップシール横折線２０の中点２４を起点に伸びて第１仮想線Ｌ１と直交する第２仮想線Ｌ２が設定され、第２仮想線Ｌ２上の第１仮想線Ｌ１よりも下方の位置に仮想点Ｐが設定され、第２頂部横折線１４は、仮想点Ｐを通過して胴部左右側面パネル６，８の両側の胴部縦折線９の上端９ａ，９ｂ同士を結ぶ曲線に形成されているので、フラップ３１を形成したときに第２頂部横折線１４は第１仮想線Ｌ１から離れた分だけ、紙容器の内側に入り込み、胴部左右パネル６，８が紙容器の内側に押し込まれて湾曲する。また、胴部左右パネル６，８の上端である第２頂部横折線１４は、フラップ３１を紙容器の側面へ折り畳む際の折り曲げ位置Ｆとなる頂部縦折線１５及びトップシール縦折線２２よりも紙容器の内側に位置する。これにより、フラップ３１に生じる折り畳みに対する反発力を低減することができ、紙容器の胴膨れを効果的に抑えることができる。 According to the paper container of the first example configured in this way, in the carton blanks 4, the first virtual connecting the upper ends 9a and 9b of the body vertical folding lines 9 on both sides of the body left and right side panels 6 and 8 with a straight line. A second virtual line L2 extending from the midpoint 24 of the second top seal horizontal folding line 20 and orthogonal to the first virtual line L1 is set, and is formed from the first virtual line L1 on the second virtual line L2. A virtual point P is set at a lower position, and the second top horizontal folding line 14 passes through the virtual point P and connects the upper ends 9a and 9b of the body vertical folding lines 9 on both sides of the body left and right side panels 6 and 8. Since it is formed in a curved line to connect, when the flap 31 is formed, the second top horizontal folding line 14 enters the inside of the paper container by the amount separated from the first virtual line L1, and the body left and right panels 6 and 8 are made of paper. It is pushed inside the container and curved. Further, the second top horizontal fold line 14, which is the upper end of the body left and right panels 6 and 8, is more paper than the top vertical fold line 15 and the top seal vertical fold line 22, which are the folding positions F when the flap 31 is folded to the side surface of the paper container. Located inside the container. As a result, the repulsive force generated in the flap 31 against folding can be reduced, and the swelling of the paper container can be effectively suppressed.

また、第２頂部縦折線１４は、仮想点Ｐで屈曲する曲線であることから、胴部左右側面パネル６，８の両端の胴部縦折線９の上端９ａ，９ｂと仮想点Ｐを結ぶ罫線を形成することにより、仮想点Ｐを通過する曲線である第２頂部横折線１４を容易に且つ確実に形成することができる。 Further, since the second top vertical fold line 14 is a curve that bends at the virtual point P, a ruled line connecting the upper ends 9a and 9b of the body vertical fold lines 9 at both ends of the body left and right side panel 6 and 8 and the virtual point P. By forming the above, the second top cross-folding line 14 which is a curve passing through the virtual point P can be easily and surely formed.

また、前記第１仮想線から前記仮想点までの距離は１ｍｍ以上であることから、前記フラップを折り曲げたときに、紙容器の胴膨れを確実に抑えることができる程度に前記胴部左右側面パネルを内側に押し込み湾曲させることができる。また、前記第１仮想線から前記仮想点までの距離は４ｍｍ以下であることから、前記胴部左右側面パネルを紙容器の内側に過度に押し込み、紙容器に歪みが生じたり、成形が困難になったり、意匠性が損なわれたりするといった事態を防ぐことができる。 Further, since the distance from the first virtual line to the virtual point is 1 mm or more, the left and right side panels of the body portion can surely suppress the body swelling of the paper container when the flap is bent. Can be pushed inward and curved. Further, since the distance from the first virtual line to the virtual point is 4 mm or less, the left and right side panels of the body portion are excessively pushed into the inside of the paper container, which causes distortion of the paper container and makes molding difficult. It is possible to prevent a situation in which the design becomes poor or the design is impaired.

図６乃至図８は本発明に係る紙容器の実施の形態の第２例を示し、図６は本発明に係る紙容器の実施の形態の第２例のカートンブランクスを示す展開図、図７は第２例の紙容器のフラップを形成した状態を示す平面図、図８は図７に示す状態からフラップを折り畳み、紙容器を形成した状態を示す正面図である。
第２例の紙容器は、第１例と基本構成において異なるところはなく、同一の構成については同一の符号を付してその説明を省略し、第１例と異なる構成についてのみ説明する。 6 to 8 show a second example of the embodiment of the paper container according to the present invention, and FIG. 6 is a development view showing the carton blanks of the second example of the embodiment of the paper container according to the present invention. Is a plan view showing a state in which the flap of the paper container of the second example is formed, and FIG. 8 is a front view showing a state in which the flap is folded from the state shown in FIG. 7 to form the paper container.
The paper container of the second example is not different from the first example in the basic configuration, the same configuration is designated by the same reference numerals, the description thereof is omitted, and only the configuration different from the first example will be described.

第２例の紙容器は、カートンブランクス４に形成された第２頂部横折線１４の形状が第１例の紙容器と異なる。具体的には、第１例では第２頂部横折線１４を仮想点Ｐで屈曲する曲線に形成していたが、第２例では図６に示すように仮想点Ｐを通過する円弧状線に形成している。
その他の構成は第１例と同様のため、説明を援用する。 The paper container of the second example is different from the paper container of the first example in the shape of the second top horizontal folding line 14 formed on the carton blanks 4. Specifically, in the first example, the second top cross-fold line 14 was formed into a curve that bends at the virtual point P, but in the second example, it is formed into an arcuate line passing through the virtual point P as shown in FIG. Is forming.
Since the other configurations are the same as those in the first example, the explanation is incorporated.

このように構成されたカートンブランクス４を組み立てて、図８に示すようにフラップ３１を形成すると、円弧状線の第２頂部横折線１４は第１仮想線Ｌ１よりも離れた分だけ、紙容器の内側に入り込み、胴部左右パネル６，８は紙容器の内側に押し込まれて湾曲する。そして、胴部左右パネル６，８の上端である第２頂部横折線１４は、形成されたフラップ３１を側面へ折り畳む際の折り曲げ位置Ｆとなる頂部縦折線１５及びトップシール縦折線２２の位置よりも紙容器の内側に位置することになる。 When the carton blanks 4 configured in this way are assembled to form the flap 31 as shown in FIG. 8, the second top horizontal folding line 14 of the arcuate line is separated from the first virtual line L1 by the amount of the paper container. The left and right panels 6 and 8 of the body are pushed into the inside of the paper container and curved. The second top horizontal fold line 14, which is the upper end of the body left and right panels 6 and 8, is from the position of the top vertical fold line 15 and the top seal vertical fold line 22, which are the folding positions F when the formed flap 31 is folded to the side surface. Will also be located inside the paper container.

この状態から、頂部縦折線１５及びトップシール縦折線２２を山折りしてフラップ３１を紙容器の側面に折り畳み胴部左右側面パネル６，８に接着する。このとき、フラップ３１の折り曲げ位置Ｆよりも第２頂部横折線１４が紙容器の内側に入り込むので、フラップ３１の折り曲げに胴部左右側面パネル６，８が緩衝せず、フラップ３１の折り曲げに対する反発力を抑えて容易に折り畳むことができる。また、フラップ３１の折り曲げ位置Ｆと胴部左右側面パネル６，８との間には、第２頂部横折線１４が紙容器に入り込んだ分だけの間隔ができるので、その間隔の分だけ、フラップ３１を従来の紙容器よりも深く折り曲げることができる。そして、フラップ３１を接着する胴部左右側面パネル６，８は紙容器の内側に入り込むように湾曲し、接着されたフラップ３１の反発力に対する抵抗力を有している。
これにより、胴部左右側面パネル６，８は胴膨れせず、図８に示すようにフラップ３１を紙容器の頂部２から略９０°折り曲げて、垂下した形状にすることができる。 From this state, the top vertical folding line 15 and the top seal vertical folding line 22 are mountain-folded, the flap 31 is folded on the side surface of the paper container, and the flap 31 is adhered to the left and right side panel 6 and 8 of the body portion. At this time, since the second top horizontal folding line 14 enters the inside of the paper container from the folding position F of the flap 31, the left and right side panels 6 and 8 of the body do not buffer the bending of the flap 31, and the flap 31 repels the bending. It can be easily folded with less force. Further, since there is a space between the folding position F of the flap 31 and the left and right side panels 6 and 8 of the body portion as much as the second top horizontal folding line 14 enters the paper container, the flap is separated by the distance. 31 can be bent deeper than a conventional paper container. The left and right side panels 6 and 8 of the body to which the flaps 31 are adhered are curved so as to enter the inside of the paper container, and have resistance to the repulsive force of the adhered flaps 31.
As a result, the left and right side panels 6 and 8 of the body do not swell, and as shown in FIG. 8, the flap 31 can be bent by approximately 90 ° from the top 2 of the paper container to form a hanging shape.

第２例の紙容器によれば、第２頂部縦折線１４は、仮想点Ｐを通過する円弧状線であることから、胴部左右側面パネル６，８の両端の胴部縦折線９の上端９ａ，９ｂの一方から他方へ仮想点Ｐを通過する円弧状の罫線を形成することにより、仮想点Ｐを通過す曲線の第２頂部横折線１４容易に、且つ、確実に形成することができる。
その他の効果は第１例と同様のため、説明を援用する。 According to the paper container of the second example, since the second top vertical fold line 14 is an arcuate line passing through the virtual point P, the upper ends of the body vertical fold lines 9 at both ends of the left and right side panels 6 and 8 of the body. By forming an arc-shaped ruled line passing through the virtual point P from one of 9a and 9b to the other, the second top cross-folding line 14 of the curve passing through the virtual point P can be easily and surely formed. ..
Other effects are the same as in the first example, so the explanation is used.

１ 筒状胴部
２ 頂部
３ 底部
４ カートンブランクス
５ 胴部正面パネル
６ 胴部左側面パネル
７ 胴部背面パネル
８ 胴部右側面パネル
９ 胴部縦折線
９ａ，９ｂ 胴部縦折線の上端
１０ 縦方向シールパネル
１１ 頂面パネル
１２ 側面パネル
１３ 第１頂部横折線
１４ 第２頂部横折線
１５ 頂部縦折線
１６ 傾斜計線
１７ 開口部
１８ 第１トップシール横折線
１９ 第１トップシールパネル
２０ 第２トップシール横折線
２１ 第２トップシールパネル
２２ トップシール縦折線
２３ 側面トップシールパネル縦折線
２４ 中点
２５ 外側底面パネル
２６ 内側底面パネル
２７ 第１底部横折線
２８ 第２底部横折線
２９ 底部縦折線
３０ 折り曲げ補助線
３１ フラップ
Ｌ１ 第１仮想線
Ｌ２ 第２仮想線
Ｐ 仮想点
Ｆ 折り曲げ位置
1 Cylindrical body 2 Top 3 Bottom 4 Carton blanks 5 Body front panel 6 Body left side panel 7 Body back panel 8 Body right side panel 9 Body vertical fold lines 9a, 9b Upper end of body vertical fold line 10 Vertical Directional seal panel 11 Top panel 12 Side panel 13 1st top horizontal fold line 14 2nd top horizontal fold line 15 Top vertical fold line 16 Incline meter line 17 Opening 18 1st top seal horizontal fold line 19 1st top seal panel 20 2nd top Seal horizontal fold line 21 2nd top seal panel 22 Top seal vertical fold line 23 Side top seal panel vertical fold line 24 Midpoint 25 Outer bottom panel 26 Inner bottom panel 27 1st bottom horizontal fold line 28 2nd bottom horizontal fold line 29 Bottom vertical fold line 30 Bend Auxiliary line 31 Flap L1 1st virtual line L2 2nd virtual line P Virtual point F Bending position

Claims (8)

四角の筒状胴部を形成するところの胴部縦折線を介して連接している胴部正面パネルと胴部左右側面パネルと胴部背面パネルとを有し、頂部を形成するところの前記胴部正面パネル及び前記胴部背面パネルに第１頂部横折線を介して連接する一対の頂面パネルと、前記胴部左右側面パネルに第２頂部横折線を介して連接する一対の側面パネルと、前記一対の頂面パネルに第１トップシール横折線を介して連接する一対の第１トップシールパネルと、前記一対の側面パネルに第２トップシール横折線を介して連接する一対の第２トップシールパネルとを有し、前記一対の側面パネルには前記第２トップシールパネル横折線の中点から前記第２頂部横折線の両端を結ぶ傾斜罫線が形成され、前記第２トップシールパネルには前記第２トップシールパネルの上端から垂下して前記第２トップシールパネル横折線の中点に渡る側面トップシール縦折線が形成されたカートンブランクスから形成され、前記側面トップシールパネルを山折りして第１トップシールパネル及び第２トップシールパネルの対向面を貼り合わせて頂部を封止し、前記傾斜罫線を折り込み前記側面パネルから略三角形状のフラップを形成し、前記フラップを前記筒状胴部の左右の側面に折り畳んで平坦な頂部が形成される紙容器であって、
前記カートンブランクスには、前記胴部左右側面パネルの両側の前記胴部縦折線の上端同士を直線で結ぶ第１仮想線と、前記第２トップシール横折線の中点を起点に伸びて前記第１仮想線と直交する第２仮想線が設定され、
前記第２仮想線上の前記第１仮想線よりも下方の位置に仮想点が設定され、
前記第２頂部横折線は、前記仮想点を通過して前記胴部左右側面パネルの両側の前記胴部縦折線の上端同士を結ぶ曲線に形成されていることを特徴とする紙容器。 The body having a body front panel, a body left and right side panels, and a body back panel, which are connected via a body vertical fold line forming a square tubular body, and forming a top. A pair of top panels that are connected to the front panel of the body and the back panel of the body via a first top horizontal fold line, and a pair of side panels that are connected to the left and right side panels of the body via a second horizontal fold line. A pair of first top seal panels connected to the pair of top panels via a first top seal horizontal folding line, and a pair of second top seals connected to the pair of side panels via a second top seal horizontal folding line. The pair of side panels are formed with an inclined ruled line connecting both ends of the second top horizontal folding line from the midpoint of the second top sealing panel horizontal folding line, and the second top sealing panel is formed with the above-mentioned The side top seal panel is formed from carton blanks on which a side top seal vertical fold line is formed by hanging from the upper end of the second top seal panel and extending to the middle point of the second top seal panel horizontal fold line. The facing surfaces of the 1 top seal panel and the 2nd top seal panel are bonded together to seal the top, the inclined ruled line is folded in to form a substantially triangular flap from the side panel, and the flap is attached to the tubular body. A paper container that is folded on the left and right sides to form a flat top.
The carton blanks extend from the midpoint of the first virtual line connecting the upper ends of the body vertical folding lines on both sides of the body left and right side panels with a straight line and the midpoint of the second top seal horizontal folding line to the first. A second virtual line orthogonal to the first virtual line is set,
A virtual point is set at a position on the second virtual line below the first virtual line.
The second top horizontal folding line is a paper container formed in a curved line that passes through the virtual point and connects the upper ends of the vertical folding lines on both sides of the left and right side panels of the body. 前記第２頂部縦折線は、前記仮想点で屈曲する曲線であることを特徴とする請求項１に記載の紙容器。 The paper container according to claim 1, wherein the second top vertical folding line is a curve that bends at the virtual point. 前記第２頂部縦折線は、前記仮想点を通過する円弧状線であることを特徴とする請求項１に記載の紙容器。 The paper container according to claim 1, wherein the second top vertical folding line is an arcuate line passing through the virtual point. 前記第１仮想線から前記仮想点までの距離は、１ｍｍ以上４ｍｍ以下であることを特徴とする請求項１から３のいずれか１項に記載の紙容器。 The paper container according to any one of claims 1 to 3, wherein the distance from the first virtual line to the virtual point is 1 mm or more and 4 mm or less. 前記第２頂部横折線は、側面に折り畳まれる前記フラップに覆われる範囲に形成されていることを特徴とする請求項１から４のいずれか１項に記載の紙容器。 The paper container according to any one of claims 1 to 4, wherein the second top horizontal folding line is formed in a range covered by the flap that is folded to the side surface. 前記胴部左右側面パネルには、前記第２頂部横折線から下方に伸びる折り曲げ補助線が単数又は複数形成されていることを特徴とする請求項１から５のいずれか１項に記載の紙容器。 The paper container according to any one of claims 1 to 5, wherein a single or a plurality of bending auxiliary lines extending downward from the second top horizontal folding line are formed on the left and right side panels of the body portion. .. 前記折り曲げ補助線は、前記第２仮想線と平行となるように形成されていることを特徴とする請求項６に記載の紙容器。 The paper container according to claim 6, wherein the bending auxiliary line is formed so as to be parallel to the second virtual line. 前記折り曲げ補助線の内の少なくとも一本は、前記第２仮想線上に形成されていることを特徴とする請求項７に記載の紙容器。

The paper container according to claim 7, wherein at least one of the bending auxiliary lines is formed on the second virtual line.
JP2019042076A 2019-03-07 2019-03-07 Paper container Pending JP2020142839A (en)

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Citations (11)

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JPS53146642U (en) * 1977-04-25 1978-11-18
JPS6359811U (en) * 1986-10-08 1988-04-21
JPH0318330Y2 (en) * 1987-01-28 1991-04-18
JPH0330261Y2 (en) * 1984-05-23 1991-06-26
FR2731204A1 (en) * 1995-03-03 1996-09-06 Packart Packaging box made from cardboard blank
JPH09142441A (en) * 1995-11-22 1997-06-03 Dainippon Printing Co Ltd Top sealing method for paper container for liquid
JPH1072028A (en) * 1996-08-29 1998-03-17 Toppan Printing Co Ltd Blank sheet for square cylindrical paper container for liquid
JP3101324B2 (en) * 1992-07-28 2000-10-23 エム−パック・リミテッド Improvements in or for product containers
JP2007099391A (en) * 2005-09-12 2007-04-19 Akira Taguchi Paper container
JP2017013860A (en) * 2015-07-01 2017-01-19 大日本印刷株式会社 Blank plate and container
JP2017114560A (en) * 2015-12-25 2017-06-29 大日本印刷株式会社 Blank for paper container and producing method of paper container with the same

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53146642U (en) * 1977-04-25 1978-11-18
JPH0330261Y2 (en) * 1984-05-23 1991-06-26
JPS6359811U (en) * 1986-10-08 1988-04-21
JPH0318330Y2 (en) * 1987-01-28 1991-04-18
JP3101324B2 (en) * 1992-07-28 2000-10-23 エム−パック・リミテッド Improvements in or for product containers
FR2731204A1 (en) * 1995-03-03 1996-09-06 Packart Packaging box made from cardboard blank
JPH09142441A (en) * 1995-11-22 1997-06-03 Dainippon Printing Co Ltd Top sealing method for paper container for liquid
JPH1072028A (en) * 1996-08-29 1998-03-17 Toppan Printing Co Ltd Blank sheet for square cylindrical paper container for liquid
JP2007099391A (en) * 2005-09-12 2007-04-19 Akira Taguchi Paper container
JP2017013860A (en) * 2015-07-01 2017-01-19 大日本印刷株式会社 Blank plate and container
JP2017114560A (en) * 2015-12-25 2017-06-29 大日本印刷株式会社 Blank for paper container and producing method of paper container with the same

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