JP6486706B2 - Self-supporting paper container - Google Patents
Self-supporting paper containerInfo
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- JP6486706B2 JP6486706B2 JP2015025513A JP2015025513A JP6486706B2 JP 6486706 B2 JP6486706 B2 JP 6486706B2 JP 2015025513 A JP2015025513 A JP 2015025513A JP 2015025513 A JP2015025513 A JP 2015025513A JP 6486706 B2 JP6486706 B2 JP 6486706B2
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Description
本発明は、非使用時には扁平で、使用時にはカップ状容器になる自立性紙容器に関するものである。 The present invention relates to a self-supporting paper container that is flat when not used and becomes a cup-shaped container when used.
この種の自立性紙容器として、従来、内面にポリエチレンをコーティングした矩形の紙に、中央部に側辺方向と直交する方向に沿って等間隔の２面の折線底部を区画する三本の横折線が刻設され、三本の横折線の外側に区画された両面が側部とされ、２面の折線底部及び両側部の左右の各側辺に沿って貼着部を区画するそれぞれ１本の貼着部区画縦折線が刻設され、さらに、それぞれの１本の貼着部区画縦折線より内側に離れた位置に１本の縦折線が刻設されてなり、組み立てにあっては、２面の折線底部を区画する三本の横折線のうちの中央の横折線を山折りし、両側の横折線を谷折りして両側面部を重ね、２面の折線底部及び両側部の左右の各側辺に沿って貼着部区画縦折線により区画された対向する貼着部をシールした自立紙カップが提案されている（例えば、特許文献１参照。）。 As this type of self-supporting paper container, conventionally, a rectangular paper whose inner surface is coated with polyethylene is divided into three horizontal lines that divide the bottom part of two folding lines at equal intervals along the direction perpendicular to the side direction at the center part. A fold line is engraved, and both sides of the three horizontal fold lines are defined as side portions, and one each divides the sticking portion along the left and right sides of the two fold line bottoms and both sides. A vertical fold line is engraved, and one vertical fold line is engraved at a position farther inward than each of the single adhesive section vertical fold lines. Of the three horizontal folding lines that divide the bottom of the two folding lines, fold the central horizontal folding line, fold the lateral folding lines on both sides and overlap the two side faces, A self-supporting paper cup that seals the opposite sticking part divided by the sticking part section vertical folding line along each side. Are plan (e.g., see Patent Document 1.).
特許文献１に記載されている自立紙カップは、非使用時は、組み立てられた状態、即ち扁平に折り畳まれた状態にあり、使用時には、両側の貼着部の底部側を持って外方より内向きに押圧を加えることにより、側部が縦折線に沿って折れ曲がり、三本の横折線の折り曲げにより折り畳まれた２面の折線底部が広げられて平面部が略平板状となるとともに、両側が三角形状に折り曲げられて底面が形成され、下方部は略六角筒状に、上方は楕円筒状に開いた自立可能なカップ状となる。 The self-supporting paper cup described in Patent Document 1 is in an assembled state, that is, in a state of being folded flat when not in use, and in use, has a bottom side of the sticking portions on both sides and is inward from the outside. By applying pressure in the direction, the side part bends along the vertical fold line, the bottom part of the two fold lines folded by folding the three horizontal fold lines is expanded, the flat part becomes substantially flat, and both sides are A bottom surface is formed by being bent into a triangular shape, and the lower part is a substantially hexagonal cylindrical shape, and the upper part is a self-supporting cup shape that is opened in an elliptical cylindrical shape.
しかしながら、特許文献１に記載された自立紙カップは、扁平に折り畳まれた状態からカップ状にする場合、底部側でシールされている両側の貼着部を持って外方より内向きに押圧を加えたとき、曲げ部分が多く、しかも押圧方向と三本の横折線の開方向への折り曲げ方向や、２面の折線底部が広げられて形成される平面部の両側が三角形状に折り曲げられ、折り曲げ方向が一致していないため、スムーズな折り曲げが得難く、カップ状の成形が非常に面倒であるといった問題があった。特に、三本の横折線の間隔が広いと、両側の貼着部を持って外方より内向きに押圧を加えたとき、三本の横折線の開方向への折り曲げや、２面の折線底部が広げられて形成される平面部の両側の三角形状への折り曲げが一層困難となり、このことから、広い底面を有するカップの成形には適さないといった問題があった。 However, when the self-supporting paper cup described in Patent Document 1 is made into a cup shape from a flat folded state, it has a sticking part on both sides sealed on the bottom side and presses inward from the outside. When there are many bent parts, both the pressing direction and the folding direction of the three horizontal folding lines in the opening direction, and both sides of the flat part formed by expanding the bottom of the two folding lines are folded in a triangular shape, and folded. Since the directions do not match, there has been a problem that smooth bending is difficult to obtain and cup-shaped molding is very troublesome. In particular, if the distance between the three horizontal fold lines is wide, the side fold lines will be folded in the open direction or the two side fold lines will be applied when pressing inward from the outside with the adhesive parts on both sides. The flat part formed by expanding the bottom part is more difficult to bend into a triangular shape on both sides, which has a problem that it is not suitable for molding a cup having a wide bottom face.
また、底面を形成する２面の折線底部を区画する三本の横折線の刻設の入れ方が浅いと保形性が弱く、折れ線底部が下に膨らんでしまい、安定した自立性が得られなくなるといった問題があった。また、側部と折線底部と重なる部分の貼着部は二重となっているためシール性に難があるといった問題があった。さらには、両側部に刻設された縦折線が、側部の印刷美粧性を悪くするといった問題があった。 In addition, if the method of engraving the three horizontal folding lines that divide the bottom of the two folding lines that form the bottom surface is shallow, the shape retention will be weak and the bottom of the folding line will swell downward, resulting in stable independence. There was a problem of disappearing. Moreover, since the sticking part of the part which overlaps a side part and a broken line bottom part is double, there existed a problem that sealing performance had difficulty. Furthermore, there has been a problem in that the vertical folding lines engraved on both sides deteriorate the printing beauty of the sides.
本発明の目的は、非使用時には扁平で、使用時には簡単な操作で容易に保形性に優れたカップ状容器に成形できる自立性紙容器を提供することにある。 An object of the present invention is to provide a self-supporting paper container that is flat when not in use and can be easily formed into a cup-shaped container having excellent shape retention by a simple operation when in use.
上記の目的を達成するために、請求項１に記載の発明は、紙基材の内面に熱可塑性樹脂フィルムをラミネートした矩形の容器素材を、前記熱可塑性樹脂フィルム面を内側にして二つ折りにし、二つ折りした前記容器素材の両側辺を接着し、折り返し辺部を底部側とした自立可能な自立性紙容器において、前記二つ折りした前記容器素材の折り返し辺部を挟んで対向するそれぞれの側面部における紙基材に、前記折り返し辺部の略中央に位置し、前記折り返し辺部を起点とし上方に所定長さ伸長する２本の平行する縦切れ目が所定の間隔を開けて設けられ、また、前記２本の縦切れ目と前記容器素材の両側辺の接着部の内側下端との間に位置する前記折り返し辺部における紙基材にそれぞれ横切れ目が設けられており、前記２本の縦切れ目及び前記それぞれの横切れ目は、ラミネートした熱可塑性樹脂フィルムを切断することなく紙基材に切れ目が形成されており、また、前記紙基材の内面にラミネートした前記熱可塑性樹脂フィルムは、前記容器素材の両側辺の接着部の内側下端から前記２本の縦切れ目の上端の外側を通る凸弧状の仮想輪郭線で区切られたエリアで紙基材と疑似接着となっており、前記エリアは、前記２本の平行する縦切れ目間の折り返し辺部の内側への押し込みと、押し込みにより前記側面部における紙基材の端辺の拡開に伴って、紙基材と疑似接着となっている熱可塑性樹脂フィルムが紙基材から剥離するようになっており、前記対向するそれぞれの側面部における紙基材には、前記２本の平行する縦切れ目の上端を結ぶ押し罫線が前記仮想輪郭線の内側に設けられ、前記押し罫線は、上方に向かって凸円弧状となっていることを特徴とする。 In order to achieve the above object, the invention described in claim 1 is characterized in that a rectangular container material obtained by laminating a thermoplastic resin film on the inner surface of a paper substrate is folded in half with the thermoplastic resin film surface inside. In the self-supporting self-supporting paper container having both sides of the container material folded in two and having the folded-back side as the bottom side, the respective sides facing each other with the folded-up side of the container material folded in half Two parallel longitudinal cuts that are located at the approximate center of the folded side portion and extend upward from the folded side portion by a predetermined length are provided at a predetermined interval on the paper base material in the portion, and the and transverse cuts are respectively provided on the paper substrate in the folded sides, the two longitudinal cuts located between the inner lower end of the bonding portion of both sides of the container material with the longitudinal cut of the two as well as Serial Each transverse cut is cut is formed on the paper substrate without cutting the laminated thermoplastic resin film, also, the thermoplastic resin film laminated on the inner surface of said paper substrate, said container material The paper substrate is pseudo-bonded in an area delimited by a convex arc-shaped virtual outline passing from the inner lower end of the adhesive portion on both sides of the two vertical cuts to the outer side of the two vertical cuts , Thermoplastic that becomes pseudo-adhesive with the paper base material by pushing inward the folded side between two parallel longitudinal cuts and expanding the edge of the paper base at the side face by the pushing The resin film is peeled off from the paper base material, and the paper base material on each of the opposed side surfaces has a pressing ruled line connecting the upper ends of the two parallel vertical cuts inside the virtual contour line. Set in Is, the push borders, characterized in that has a convex arcuate upward.
請求項１に記載の発明によれば、対向する前記側面部の両側辺の接着部を両側から内方へ押圧して対向する前記側面部をそれぞれ外側に湾曲させるようにしながら、同時に対向するそれぞれの前記側面部における紙基材に前記容器素材の折り返し辺部の略中央に位置して設けられた前記２本の平行する縦切れ目間の折り返し辺部を内側に押し込み、前記２本の平行する縦切れ目間にあって対向する前記側面部の対向部位を平面状とすることにより、前記側面部が押し広げられる。
そして、前記側面部の広がりにともなって、前記側面部における紙基材の前記横切れ目で形成される端辺が、前記容器素材の両側辺の接着部の内側下端を支点として拡開し、前記側面部が外方向に湾曲して筒状部を形成する。
このとき、前記紙基材の内面にラミネートした前記熱可塑性樹脂フィルムは、前記容器素材の両側辺の接着部の内側下端から前記２本の縦切れ目の上端の外側を通る凸弧状の仮想輪郭線で区切られたエリアで紙基材と疑似接着となっているので、前記２本の平行する縦切れ目間の折り返し辺部の内側への押し込みと、押し込みによる前記側面部における紙基材の前記端辺の拡開に伴って、前記仮想輪郭線で区切られたエリアで紙基材と疑似接着となっている前記熱可塑性樹脂フィルムが紙基材から剥離し、前記２本の平行する縦切れ目間の折り返し辺部の押し込みや前記側面部における紙基材の端辺の拡開を可能とする。
このようにして前記側面部により筒状部が形成され、紙基材から剥離した前記熱可塑性樹脂フィルムが底部となってカップ状容器が成形される。
成形されたカップ状容器は、前記側面部の内側に押し込まれて平面状となった前記対向部位により、前記側面部が押し広げられた状態に支えられ、その形態が保持される。
また、成形されたカップ状容器は、前記側面部における紙基材の端辺が、前記容器素材の両側辺の接着部の内側下端を支点として拡開しているので、前記端辺が載置面に当接する底辺となり安定した自立が可能となる。
According to the first aspect of the present invention, the opposing side portions are pressed inward from both sides to cause the opposing side portions to bend outward, respectively, while simultaneously facing each other. The folded side portion between the two parallel vertical cuts provided at the approximate center of the folded side portion of the container material is pushed into the paper base in the side surface portion of the container material, and the two parallel portions are pushed inward. By making the opposing part of the said side part which is between vertical cuts and opposes into a planar shape, the said side part is expanded.
And with the spread of the side surface portion, the edge formed by the transverse cut of the paper base material in the side surface portion expands with the inner lower end of the adhesive portion on both sides of the container material as a fulcrum, A side part curves outward and forms a cylindrical part.
At this time, the thermoplastic resin film laminated on the inner surface of the paper base is a convex arc-shaped virtual contour line passing from the inner lower end of the adhesive portion on both sides of the container material to the outer side of the upper ends of the two vertical cuts. Since the paper substrate and the paper substrate are pseudo-bonded in the area divided by the above, the end of the paper substrate in the side surface portion by pushing inward the folded side between the two parallel longitudinal cuts Along with the expansion of the side, the thermoplastic resin film that is pseudo-adhered to the paper base material in the area delimited by the virtual contour line peels from the paper base material, and the space between the two parallel longitudinal cuts. It is possible to push in the folded side portion of the paper and to widen the end side of the paper base in the side surface portion.
In this way, a cylindrical part is formed by the side part, and the thermoplastic resin film peeled off from the paper base is used as a bottom part to form a cup-shaped container.
The molded cup-shaped container is supported in a state where the side surface portion is expanded by the opposed portion that is pushed into the inside of the side surface portion and becomes flat, and the shape thereof is maintained.
In addition, since the end of the paper base material in the side surface portion of the cup-shaped container is expanded with the inner lower ends of the adhesive portions on both sides of the container material as fulcrums, the end side is placed. It becomes the bottom that comes into contact with the surface, enabling stable independence.
請求項１に記載の発明によれば、前記対向するそれぞれの側面部における紙基材には、前記２本の平行する縦切れ目の上端を結ぶ押し罫線が設けられているので、前記側面部における紙基材に前記容器素材の折り返し辺部の略中央に位置して設けられた前記２本の平行する縦切れ目間の折り返し辺部を内側に押し込んだとき、前記押し罫線が折曲部位となって前記２本の平行する縦切れ目の上端間の折曲を誘導することになり、前記２本の平行する縦切れ目間の折り返し辺部の押し込みが容易になり、前記側面部の対向部位を確実に平面状にすることができる。 According to the invention described in claim 1, the paper substrate in each of the side portions of the opposed, because pushing border is provided for connecting the upper end of the vertical cuts parallel of the two, in the side surface portion When the folded side portion between the two parallel vertical cuts provided at the approximate center of the folded side portion of the container material is pushed inward on the paper base material, the crease line becomes a bent portion. Thus, the bending between the upper ends of the two parallel longitudinal cuts is guided, the folding side part between the two parallel vertical cuts can be easily pushed, and the opposite part of the side face part can be reliably secured. Can be planar.
請求項１に記載の発明によれば、前記２本の平行する縦切れ目の上端を結ぶ押し罫線は、上方に向かって凸円弧状となっているので、前記対向する側面部の間に押し込まれ、平面状となっている前記対向部位は前記凸円弧状に沿って上方へ突出する円弧状となることから、前記対向部位は、閉じようとする前記側面部により常に上方へ付勢された状態となる。そして、前記側面部に両外側から押圧がかかったとき、その押圧力は前記対向部位を押し上げる方向に働き、押し上げる方向に押圧力を受けた前記対向部位は、前記仮想輪郭線で区切られたエリアの外で紙基材と接着した状態にある前記熱可塑性樹脂フィルムにより、所定以上の内側への押し込みが阻止されるので、平面状となって前記側面部を押し広げている前記対向部位は、前記側面部に両外側から強い押圧がかかっても、前記対向部位が前記側面部の内部にさらに押し込まれることや、外部に押し出されるといったことが効果的に防止でき、カップ状容器の保形性を向上させることができる。
According to the invention described in claim 1, press ruled line connecting the upper end of the vertical cuts parallel of the two, so that a convex arc shape upward, pushed between the side portions of the opposed Further, since the facing portion that is planar is an arc shape that protrudes upward along the convex arc shape, the facing portion is always urged upward by the side surface portion to be closed It becomes. When the side surface portion is pressed from both outer sides, the pressing force works in a direction to push up the facing portion, and the facing portion receiving the pressing force in the pushing direction is an area delimited by the virtual contour line The thermoplastic resin film in a state of being bonded to the paper base outside is prevented from being pushed inward by a predetermined amount or more. Even if strong pressing is applied to the side surface from both outsides, it is possible to effectively prevent the facing portion from being further pushed into the inside of the side surface portion or pushed out to the outside, and the shape retention of the cup-shaped container Can be improved.
本発明に係る自立性紙容器によれば、使用時に、側面部の両側辺の接着部を両側から内方へ押圧して側面部を外側に湾曲させるようにしながら、同時に側面部における紙基材に設けられた２本の平行する縦切れ目間の折り返し辺部を内側に押し込み、２本の平行する縦切れ目間にあって対向する側面部の対向部位を平面状にするといった簡単な操作により、カップ状容器に成形して用いることができる。そして、成形されたカップ状容器は、側面部の内側に押し込まれて平面状となった対向部位で側面部が押し広げられた状態に支えられるので、優れた保形性を得ることができる。
また、成形されたカップ状容器の底面の広さ、すなわち、筒径の大きさは２本の平行する縦切れ目の長さにより決定されるので、２本の平行する縦切れ目の長さを変えることにより、成形されたカップ状容器の底面を任意の広さに容易に設定することができ、そして、成形されたカップ状容器の底面の広さの相違、即ち２本の平行する縦切れ目の長さの相違によって、成形されたカップ状容器の保形性が損なわれることはない。
また、成形されたカップ状容器は、両側面部の底部側における紙基材の端辺が拡開しているので、端辺が載置面に当接する底辺となり安定した自立を得ることができる。
また、側面部には刻設された縦折線等が存在しないので、側面部の印刷美粧性に優れたものとなる。
According to the self-supporting paper container according to the present invention, during use, while pressing the adhesive portions on both sides of the side portion inward from both sides to bend the side portion outward, at the same time, the paper base material in the side portion By pressing the folded side between two parallel longitudinal cuts provided in the inside, and making the opposing part of the opposite side face between the two parallel vertical cuts flat, the cup shape It can be molded into a container and used. And since the shape | molded cup-shaped container is supported in the state by which the side part was expanded by the opposing site | part which was pushed inside the side part and became flat shape, the outstanding shape retention property can be acquired.
Further, since the width of the bottom surface of the molded cup-shaped container, that is, the size of the cylinder diameter is determined by the length of the two parallel longitudinal cuts, the length of the two parallel longitudinal cuts is changed. Thus, the bottom surface of the molded cup-shaped container can be easily set to an arbitrary width, and the difference in the width of the bottom surface of the molded cup-shaped container, that is, two parallel longitudinal cuts The shape retention of the molded cup-shaped container is not impaired by the difference in length.
Moreover, since the edge of the paper base material on the bottom side of the both side surfaces of the cup-shaped container is widened, the edge becomes the bottom contacting the mounting surface, and stable self-supporting can be obtained.
Further, since there are no vertical fold lines or the like engraved on the side surface, the printing beauty of the side surface is excellent.
以下、本発明に係る自立性紙容器の実施の形態の一例を図面により詳細に説明する。
図１乃至図４は本発明に係る自立性紙容器の実施の形態の一例を示し、図１は本例の自立性紙容器を示す斜視図、図２は図１に示す自立性紙容器の外面側展開図、図３は図１に示す自立性紙容器をカップ状容器に成形した状態を示す斜視図、図４は図３に示すカップ状容器の底部側を示す斜視図である。
Hereinafter, an example of an embodiment of a self-supporting paper container according to the present invention will be described in detail with reference to the drawings.
1 to 4 show an example of an embodiment of a self-supporting paper container according to the present invention, FIG. 1 is a perspective view showing the self-supporting paper container of this example, and FIG. 2 is a diagram of the self-supporting paper container shown in FIG. FIG. 3 is a perspective view showing a state where the self-supporting paper container shown in FIG. 1 is formed into a cup-shaped container, and FIG. 4 is a perspective view showing the bottom side of the cup-shaped container shown in FIG.
本例の自立性紙容器は、紙基材１の内面に熱可塑性樹脂フィルム２をラミネートした矩形の容器素材３を、熱可塑性樹脂フィルム２の面を内側にして二つ折りにし、二つ折りした容器素材３の両側辺４を接着し、折り返し辺部５を底部６側とする。 The self-supporting paper container of this example is a container in which a rectangular container material 3 in which a thermoplastic resin film 2 is laminated on the inner surface of a paper substrate 1 is folded in half with the thermoplastic resin film 2 facing inward, and folded in half. The both sides 4 of the material 3 are bonded together, and the folded side 5 is the bottom 6 side.
紙基材１の坪量は１５０ｇ〜３００ｇ／ｍ２が好ましい。坪量が１５０ｇ／ｍ２以下であると後述する保形性が悪くなり、３００ｇ／ｍ２を超えると開封性に支障を来す。
また、熱可塑性樹脂フィルム２にあっては特に限定されないが、ガスバリヤ性、水蒸気バリヤ性のある樹脂フィルムであることが好ましい。本例では、ＰＥ／ＥＶＯＨ／ＰＥの順で積層した樹脂フィルムが使用されている。熱可塑性樹脂フィルム２の厚さにあっては３０μ〜１００μが好ましい。厚さが３０μ以下であると、後述する熱可塑性樹脂フィルム２で形成される底部６としての強度が弱く、１００μを超えると復元力が強くなり後述する保形性が悪くなる。
The basis weight of the paper substrate 1 is preferably 150 g to 300 g / m 2 . If the basis weight is 150 g / m 2 or less, the shape-retaining property described later deteriorates, and if it exceeds 300 g / m 2 , the unsealing property is hindered.
Moreover, although it does not specifically limit in the thermoplastic resin film 2, It is preferable that it is a resin film with gas barrier property and water vapor | steam barrier property. In this example, a resin film laminated in the order of PE / EVOH / PE is used. The thickness of the thermoplastic resin film 2 is preferably 30 μ to 100 μ. When the thickness is 30 μm or less, the strength as the bottom portion 6 formed by the thermoplastic resin film 2 described later is weak, and when it exceeds 100 μm, the restoring force increases and the shape retention described later deteriorates.
二つ折りした容器素材３の折り返し辺部５を挟んで対向するそれぞれの側面部７における紙基材１には、折り返し辺部５の略中央に位置し、容器素材３の折り返し辺部５を起点とし上方に所定長さ伸長する２本の平行する縦切れ目８が所定の間隔を開けて設けられ、また、２本の縦切れ目８と容器素材３の両側辺４の接着部９の内側下端との間に位置する折り返し辺部５における紙基材１にそれぞれ横切れ目１０が設けられている。
また、紙基材１の内面にラミネートした熱可塑性樹脂フィルム２は、容器素材３の両側辺４の接着部９の内側下端から２本の縦切れ目８の上端の外側を通る凸弧状の仮想輪郭線１１で区切られたエリアＳで紙基材１と疑似接着となっている。
The paper base material 1 on each side surface portion 7 facing the folded side portion 5 of the container material 3 folded in half is located at the approximate center of the folded side portion 5 and starts from the folded side portion 5 of the container material 3. And two parallel longitudinal slits 8 extending a predetermined length upward are provided at predetermined intervals, and the two longitudinal slits 8 and the inner lower end of the adhesive portion 9 on both sides 4 of the container material 3 Cross cuts 10 are respectively provided in the paper base material 1 in the folded side portion 5 located between the two.
Further, the thermoplastic resin film 2 laminated on the inner surface of the paper base material 1 has a convex arc-shaped virtual contour that passes from the inner lower end of the adhesive portion 9 on both sides 4 of the container material 3 to the outer side of the upper ends of the two vertical cuts 8. In the area S delimited by the line 11, the paper substrate 1 is pseudo-bonded.
また、本例では、対向するそれぞれの側面部７における紙基材１には、２本の平行する縦切れ目８の上端を結ぶ押し罫線１２が設けられている。この押し罫線１２は、上方に向かって凸円弧状となっている。 Moreover, in this example, the paper base 1 in each side part 7 which opposes is provided with the ruled line 12 which connects the upper end of the two parallel longitudinal cuts 8. FIG. The push ruled line 12 has a convex arc shape upward.
上記のように構成される本例の自立性紙容器は、非使用時は、図１に示すように扁平な状態であるが、使用時にあっては、以下の操作でカップ状容器１３に成形される。 The self-supporting paper container of this example configured as described above is in a flat state as shown in FIG. 1 when not in use, but is molded into a cup-shaped container 13 by the following operation when in use. Is done.
先ず、対向する側面部７の両側辺４の接着部９を両側から内方へ押圧して対向する側面部７をそれぞれ外側に湾曲させる。同時に対向するそれぞれの側面部７における紙基材１に容器素材３の折り返し辺部５の略中央に位置して設けられた２本の平行する縦切れ目８間の折り返し辺部５ａを内側に押し込み、２本の平行する縦切れ目８間にあって対向する側面部７の対向部位１４を平面状とする。 First, the adhesive portions 9 on both sides 4 of the opposing side surface portion 7 are pressed inward from both sides to bend the opposing side surface portions 7 outward. At the same time, the folded side portion 5a between two parallel vertical cuts 8 provided at the substantially center of the folded side portion 5 of the container material 3 is pushed inward on the paper base material 1 on each side surface portion 7 facing each other. The facing portion 14 of the side surface portion 7 that is located between the two parallel longitudinal cuts 8 is opposed to the plane.
２本の平行する縦切れ目８間の折り返し辺部５ａの押し込みにあっては、本例では側面部７における紙基材１に、２本の平行する縦切れ目８の上端を結ぶ押し罫線１２が設けられているので、２本の平行する縦切れ目８間の折り返し辺部５ａを内側に押し込んだとき、押し罫線１２が折曲部位となって２本の平行する縦切れ目８の上端間の折曲を誘導することになり、２本の平行する縦切れ目８間の折り返し辺部５ａの押し込みが容易になり、側面部７の対向部位１４を確実に平面状にすることができる。 In the pressing of the folded side portion 5a between the two parallel vertical cuts 8, in this example, the ruled line 12 connecting the upper ends of the two parallel vertical cuts 8 is formed on the paper base 1 in the side surface portion 7. Therefore, when the folded side 5a between the two parallel vertical cuts 8 is pushed inward, the crease line 12 becomes a bent portion and the folding between the upper ends of the two parallel vertical cuts 8 is performed. The bending is induced, the folding side portion 5a is easily pushed between the two parallel longitudinal cuts 8, and the facing portion 14 of the side surface portion 7 can be surely made flat.
このようにして２本の平行する縦切れ目８間の折り返し辺部５ａを押し込み、対向部位１４を平面状にすることにより対向する側面部７が押し広げられ、側面部７の広がりにともなって、側面部７における紙基材１の横切れ目１０で形成される端辺１５が、容器素材３の両側辺４の接着部９の内側下端を支点として拡開し、側面部７が外方向に湾曲して筒状部１６を形成する。 In this way, by pressing the folded side 5a between the two parallel longitudinal cuts 8 and making the facing portion 14 planar, the facing side 7 is expanded, and with the spreading of the side 7, The edge 15 formed by the transverse cut 10 of the paper base material 1 in the side surface portion 7 expands with the inner lower end of the adhesive portion 9 on both sides 4 of the container material 3 as a fulcrum, and the side surface portion 7 curves outward. Thus, the cylindrical portion 16 is formed.
このとき、紙基材１の内面にラミネートした熱可塑性樹脂フィルム２は、容器素材３の両側辺４の接着部９の内側下端から２本の縦切れ目８の上端の外側を通る凸弧状の仮想輪郭線１１で区切られたエリアＳで紙基材１と疑似接着となっているので、２本の平行する縦切れ目８間の折り返し辺部５ａの内側への押し込みと、押し込みにより側面部７における紙基材１の端辺１５の拡開に伴って、仮想輪郭線１１で区切られたエリアＳで紙基材１と疑似接着となっている熱可塑性樹脂フィルム２が紙基材１から剥離し、２本の平行する縦切れ目８間の折り返し辺部５ａの押し込みや側面部７における紙基材１の端辺１５の拡開を可能とする。 At this time, the thermoplastic resin film 2 laminated on the inner surface of the paper substrate 1 has a convex arc-like virtual shape passing from the inner lower end of the adhesive portion 9 on both sides 4 of the container material 3 to the outer side of the upper ends of the two vertical cuts 8. Since the paper substrate 1 is pseudo-adhered in the area S delimited by the contour line 11, the inner side of the folded side part 5 a between the two parallel longitudinal cuts 8 is pushed into the side part 7. As the end 15 of the paper substrate 1 expands, the thermoplastic resin film 2 that is pseudo-bonded to the paper substrate 1 in the area S delimited by the virtual contour line 11 peels from the paper substrate 1. It is possible to push in the folded side portion 5a between two parallel longitudinal cuts 8 and to widen the end side 15 of the paper substrate 1 in the side surface portion 7.
このようにして側面部７により筒状部１６が形成され、紙基材１から剥離した熱可塑性樹脂フィルム２が底部６となってカップ状容器１３が成形される。
成形されたカップ状容器１３は、側面部７の内側に押し込まれて平面状となった対向部位１４により、側面部７が押し広げられた状態に支えられ、その形態が保持される。
また、成形されたカップ状容器１３は、側面部７における紙基材１の端辺１５が、容器素材３の両側辺４の接着部９の内側下端を支点として拡開しているので、端辺１５が載置面に当接する底辺となり安定した自立が可能となる。
In this way, the cylindrical portion 16 is formed by the side surface portion 7, and the thermoplastic resin film 2 peeled from the paper substrate 1 becomes the bottom portion 6 to form the cup-shaped container 13.
The molded cup-shaped container 13 is supported in a state in which the side surface portion 7 is expanded by the opposed portion 14 which is pushed into the inside of the side surface portion 7 and becomes flat, and the form is maintained.
Further, since the end 15 of the paper base 1 in the side portion 7 is widened with the inner lower end of the adhesive portion 9 on both sides 4 of the container material 3 as a fulcrum, The side 15 becomes a bottom side that comes into contact with the mounting surface, and stable independence is possible.
また、本例では、２本の平行する縦切れ目８の上端を結ぶ押し罫線１２は、上方に向かって凸円弧状となっているので、対向する側面部７の間に押し込まれ、平面状となっている対向部位１４は押し罫線１２の凸円弧状に沿って上方へ突出する円弧状となることから、対向部位１４は、閉じようとする側面部７により常に上方へ付勢された状態となる。
そして、側面部７に両外側から押圧がかかったとき、その押圧力は対向部位１４を押し上げる方向に働き、押し上げる方向に押圧力を受けた対向部位１４は、仮想輪郭線１１で区切られたエリアＳの外で紙基材１と接着した状態にある熱可塑性樹脂フィルム２により、所定以上の内側への押し込みが阻止されることになるので、平面状となって側面部７を押し広げる。側面部７に両外側から強い押圧がかかっても、対向部位１４が側面部７の内部にさらに押し込まれることや、外部に押し出されるといったことを効果的に防止でき、カップ状容器１３の保形性の向上が図れる。
Further, in this example, the pressed ruled line 12 connecting the upper ends of the two parallel vertical cuts 8 has a convex arc shape toward the upper side. Since the facing portion 14 has an arc shape protruding upward along the convex arc shape of the push ruled line 12, the facing portion 14 is always urged upward by the side surface portion 7 to be closed. Become.
When the side surface portion 7 is pressed from both outer sides, the pressing force acts in the direction of pushing up the facing portion 14, and the facing portion 14 that has received the pressing force in the pushing up direction is an area delimited by the virtual contour line 11. The thermoplastic resin film 2 in a state of being bonded to the paper substrate 1 outside S prevents the inner side from being pushed more than a predetermined amount. Even if the side surface portion 7 is strongly pressed from both outer sides, it is possible to effectively prevent the facing portion 14 from being further pushed into the inside of the side surface portion 7 or pushed out to the outside. Can improve the performance.
１ 紙基材
２ 熱可塑性樹脂フィルム
３ 容器素材
４ 側辺
５ 折り返し辺部
５ａ ２本の平行する縦切れ目間の折り返し辺部
６ 底部
７ 側面部
８ 縦切れ目
９ 接着部
１０ 横切れ目
１１ 仮想輪郭線
１２ 押し罫線
１３ カップ状容器
１４ 対向部位
１５ 端辺
１６ 筒状部
DESCRIPTION OF SYMBOLS 1 Paper base material 2 Thermoplastic resin film 3 Container raw material 4 Side edge 5 Folding edge part 5a Folding edge part 6 between two parallel longitudinal cuts Bottom part 7 Side face part 8 Vertical cut part 9 Bonding part 10 Horizontal cut part 11 Virtual outline 12 Pressed ruled line 13 Cup-shaped container 14 Opposed part 15 End side 16 Cylindrical part
Claims (1)
前記二つ折りした前記容器素材の折り返し辺部を挟んで対向するそれぞれの側面部における紙基材に、前記折り返し辺部の略中央に位置し、前記折り返し辺部を起点とし上方に所定長さ伸長する２本の平行する縦切れ目が所定の間隔を開けて設けられ、また、前記２本の縦切れ目と前記容器素材の両側辺の接着部の内側下端との間に位置する前記折り返し辺部における紙基材にそれぞれ横切れ目が設けられており、
前記２本の縦切れ目及び前記それぞれの横切れ目は、ラミネートした熱可塑性樹脂フィルムを切断することなく紙基材に切れ目が形成されており、
また、前記紙基材の内面にラミネートした前記熱可塑性樹脂フィルムは、前記容器素材の両側辺の接着部の内側下端から前記２本の縦切れ目の上端の外側を通る凸弧状の仮想輪郭線で区切られたエリアで紙基材と疑似接着となっており、
前記エリアは、前記２本の平行する縦切れ目間の折り返し辺部の内側への押し込みと、押し込みにより前記側面部における紙基材の端辺の拡開に伴って、紙基材と疑似接着となっている熱可塑性樹脂フィルムが紙基材から剥離するようになっており、
前記対向するそれぞれの側面部における紙基材には、前記２本の平行する縦切れ目の上端を結ぶ押し罫線が前記仮想輪郭線の内側に設けられ、前記押し罫線は、上方に向かって凸円弧状となっていることを特徴とする自立性紙容器。 A rectangular container material laminated with a thermoplastic resin film on the inner surface of a paper substrate, folded in half with the thermoplastic resin film side inward, and bonded on both sides of the folded container material, In the self-supporting self-supporting paper container on the bottom side,
The paper base material on each of the side surfaces facing each other across the folded side portion of the container material folded in half is positioned at the approximate center of the folded side portion and extends upward by a predetermined length starting from the folded side portion. Two parallel vertical cuts are provided at a predetermined interval, and in the folded side portion located between the two vertical cuts and the inner lower ends of the adhesive portions on both sides of the container material. Each paper substrate is provided with a transverse cut,
The two vertical cuts and the respective horizontal cuts are formed on the paper substrate without cutting the laminated thermoplastic resin film,
The thermoplastic resin film laminated on the inner surface of the paper base is a convex arc-shaped virtual contour line that passes from the inner lower end of the adhesive portion on both sides of the container material to the outer side of the upper ends of the two vertical cuts. It becomes pseudo-adhesion with the paper base material in the divided area ,
The area is formed by pressing the folded side part between the two parallel longitudinal cuts into the inner side and expanding the edge of the paper base part in the side part by the pressing, and the paper base and pseudo-adhesion. The thermoplastic resin film has come to peel from the paper substrate,
The paper base in each of the opposing side portions is provided with a ruled line connecting the upper ends of the two parallel longitudinal cuts inside the virtual contour line, and the ruled line is a convex circle upward. A self-supporting paper container characterized by an arc shape .
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