JP2010116168A - Structure of straw opening part of liquid food container - Google Patents

Structure of straw opening part of liquid food container Download PDF

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Publication number
JP2010116168A
JP2010116168A JP2008288585A JP2008288585A JP2010116168A JP 2010116168 A JP2010116168 A JP 2010116168A JP 2008288585 A JP2008288585 A JP 2008288585A JP 2008288585 A JP2008288585 A JP 2008288585A JP 2010116168 A JP2010116168 A JP 2010116168A
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straw
straw opening
food container
liquid food
groove
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JP5216539B2 (en
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Kosaku Ito
康作 伊藤
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Nihon Tetra Pak KK
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Nihon Tetra Pak KK
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D2231/00Means for facilitating the complete expelling of the contents
    • B65D2231/02Precut holes or weakened zones
    • B65D2231/022Precut holes or weakened zones for permitting the insertion of a tubular contents-removing device, e.g. a drinking straw

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a straw opening part of a liquid food container having a top part of a packaging material being formed of a thermoplastic material which is not broken by the vibration or the like during the conveyance but easily opened by a straw. <P>SOLUTION: In the structure of the straw opening part, a plurality of folds M1, M2 are formed at equal spacing P on face and back sides of the straw opening part 15. The folds M1, M2 have substantially semi-circular sections of the same size. A groove part N1 of the fold M1 on the front side and a groove part N2 of the fold M2 on the back side are formed on the same plane. The length of a horizontal part between the groove part N1 of the fold M1 on the front side and the groove part N2 of the fold M2 on the back side is denoted as Q1, and the length of a vertical part between the groove part N1 of the fold M1 on the front side and the fold M2 on the back side is denoted as Q2, and Q1<Q2. When a fore end of a straw 13 is pierced in the groove part N1 of the fold M1 on the front side, the groove part N1 of the fold M1 on the front side of the straw opening part 15 is lowered, and the groove part N2 on the back side is also lowered, and rupture finally occurs in the horizontal part Q1 which is a thin-walled easily-breaking part. Since the deflection rigidity is increased by the folds on the front and back sides, the structure is not broken by the vibration or the like during the conveyance. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、紙基材を熱可塑性樹脂で覆った包材で底部と側部を形成し頂部が熱可塑性樹脂で形成されて成る液体食品容器の頂部に形成されるストロー開口部構造に関するもので、ストローの突刺し開口を容易にする液体食品容器のストロー開口部構造の技術に関する。  The present invention relates to a straw opening structure formed at the top of a liquid food container in which a bottom and sides are formed by a packaging material in which a paper base is covered with a thermoplastic resin, and the top is formed of a thermoplastic resin. The present invention relates to a technology for a straw opening structure of a liquid food container that facilitates a piercing opening of a straw.

従来、牛乳、清涼飲料水等の液体食品を充填する紙容器の熱可塑性樹脂の蓋に形成されるストロー開口部構造として特許文献1の記載が知られている。   DESCRIPTION OF RELATED ART Conventionally, description of patent document 1 is known as a straw opening part structure formed in the lid | cover of the thermoplastic resin of the paper container filled with liquid foods, such as milk and a soft drink.

特許文献1によれば図12(a)、(b)に示すように、液体食品容器115の包材111は、紙基材121が熱可塑性樹脂の外側層120と内側層122で覆われ、ストロー孔116は熱可塑性樹脂で覆ってストロー孔密封部117が形成される。このストロー孔密封部117は液体食品容器115の形成工程で図示しない金型装置を使用してインジェクション成形される。ところが、ストロー孔密封部117はストローを突刺す際にストローが滑って貫通し難く、また、ストロー孔密封部117が硬くてストロー先端部が曲がってしまうという問題があった。   According to Patent Document 1, as shown in FIGS. 12A and 12B, the packaging material 111 of the liquid food container 115 has a paper base 121 covered with an outer layer 120 and an inner layer 122 of thermoplastic resin, The straw hole 116 is covered with a thermoplastic resin to form a straw hole sealing portion 117. The straw hole sealing portion 117 is injection-molded using a mold apparatus (not shown) in the process of forming the liquid food container 115. However, the straw hole sealing portion 117 has a problem that when the straw is pierced, it is difficult for the straw to slide and penetrate, and the straw hole sealing portion 117 is hard and the leading end of the straw is bent.

このため、ストロー孔密封部117に、例えばストロー孔密封部117の深さの85%〜95%で密封性を損なわない程度に薄肉溝部127が形成されるので、消費者が内容液を吸い出す際にストローでストロー孔密封部117を容易に突刺し貫通することができる。
特開2002−362548号公報
For this reason, since the thin groove part 127 is formed in the straw hole sealing part 117 to such an extent that the sealing performance is not impaired at 85% to 95% of the depth of the straw hole sealing part 117, for example, when the consumer sucks out the content liquid The straw hole sealing portion 117 can be easily pierced and penetrated with a straw.
JP 2002-362548 A

ところが、薄肉溝部127によって、ストローでストロー孔密封部117を容易に貫通できるが、稀ではあるが液体食品容器115の搬送・流通過程で振動等によって薄肉溝部127が破断する可能性があった。しかし、これを回避するために薄肉溝部127の深さを浅くすると、ストロー孔密封部117が容易に貫通できないので使用勝手が劣るという問題があった。   However, although the thin groove portion 127 can easily penetrate the straw hole sealing portion 117 with a straw, there is a possibility that the thin groove portion 127 may be broken due to vibration or the like in the process of transporting and distributing the liquid food container 115. However, if the depth of the thin groove portion 127 is made shallow in order to avoid this, there is a problem that the straw hole sealing portion 117 cannot be easily penetrated and the usability is inferior.

そこで、本発明はかかる従来技術の問題に鑑みなされたものであって、紙基材を熱可塑性樹脂で覆った包材を用いて頂部を熱可塑性樹脂で形成して成る液体食品容器において、搬送時の振動等の外力で簡単に破断や漏れることなく、且つストローの突刺しによって容易にストロ孔が開口できる液体食品容器のストロー開口部構造を提供することを目的とする。   Therefore, the present invention has been made in view of the problems of the prior art, and in a liquid food container in which a top portion is formed of a thermoplastic resin using a packaging material in which a paper base is covered with a thermoplastic resin. It is an object of the present invention to provide a straw opening structure for a liquid food container that can be easily opened by stroking a straw without being easily broken or leaked by an external force such as vibration.

請求項1の発明は、紙基材を熱可塑性樹脂で覆った包材で底部と側部を形成し頂部が熱可塑性樹脂で形成されて成る液体食品容器のストロー開口部の構造であって、前記ストロー開口部は前記頂部と一体的に形成され、前記ストロー開口部の表側と裏側に複数の襞を平行に備え、表側の前記襞の溝部と裏側の前記襞の溝部は同一水平面上でずれて形成され、前記表側の溝から隣接する前記裏側の溝に亘る水平部の厚さが、前記表側の溝から前記裏側の襞に亘る垂直部の厚さより薄く形成され、前記水平部が易破断部であることを特徴としている。   The invention of claim 1 is a structure of a straw opening portion of a liquid food container formed by forming a bottom portion and a side portion with a packaging material in which a paper base material is covered with a thermoplastic resin, and the top portion is formed with a thermoplastic resin. The straw opening is formed integrally with the top, and has a plurality of ridges in parallel on the front side and the back side of the straw opening, and the groove portion of the ridge on the front side and the groove portion of the ridge on the back side are shifted on the same horizontal plane. The horizontal portion from the front groove to the adjacent back groove is thinner than the vertical portion from the front groove to the back ridge, and the horizontal portion is easily broken. It is characterized by being a part.

従って、請求項1記載の発明では、前記ストロー開口部にストローを突刺すと、ストローの先端が表側の前記襞の溝部に掛かって、前記ストロー開口部が湾曲し液体食品容器の内部に押込まれる。この押込みによって、前記表側の溝から隣接する前記裏側の溝に亘る水平部が徐々に垂直方向に傾いていく。   Therefore, in the first aspect of the invention, when a straw is pierced into the straw opening, the tip of the straw is hooked into the groove portion on the front side, and the straw opening is bent and pushed into the liquid food container. It is. By this pushing, the horizontal portion extending from the front groove to the adjacent back groove gradually tilts in the vertical direction.

請求項2の発明は、請求項1に記載の液体食品容器のストロー開口部構造であって、前記襞の断面形状は同じ大きさで略半円形状又は弓形状に形成されることを特徴としている。   Invention of Claim 2 is the straw opening part structure of the liquid food container of Claim 1, Comprising: The cross-sectional shape of the said ridge is the same magnitude | size, It is formed in a substantially semicircle shape or a bow shape, It is characterized by the above-mentioned. Yes.

このため、請求項2記載の発明では、請求項1記載の発明の作用に加えて、表側の隣接する前記襞によってストローの先端が安定して保持されるので、前記ストロー開口部が確実且つ安定して液体食品容器の内部に湾曲して押込まれる。   For this reason, in addition to the effect | action of invention of Claim 1, in the invention of Claim 2, since the front-end | tip of the straw is stably hold | maintained by the said adjacent scissors on the front side, the said straw opening part is reliable and stable. Then, the liquid food container is curved and pushed.

請求項3の発明は、請求項1又は請求項2に記載の液体食品容器のストロー開口部構造であって、前記ストロー開口部は平面視三角星形状に形成されることを特徴としている。   The invention of claim 3 is the straw opening structure of the liquid food container according to claim 1 or 2, wherein the straw opening is formed in a triangular star shape in plan view.

請求項4の発明は、請求項1又は請求項2に記載の液体食品容器のストロー開口部構造であって、前記ストロー開口部は平面視U字形状に形成されることを特徴としている。   The invention of claim 4 is the straw opening structure of the liquid food container according to claim 1 or 2, wherein the straw opening is formed in a U-shape in plan view.

請求項5の発明は、請求項1乃至請求項4のいずれか一項に記載の液体食品容器のストロー開口部構造であって、前記複数の襞は平面視S字状で形成されることを特徴としている。   A fifth aspect of the present invention is the liquid food container straw opening structure according to any one of the first to fourth aspects, wherein the plurality of ridges are formed in an S-shape in plan view. It is a feature.

請求項1の発明によれば、前記ストロー開口部にストローを突刺すと、ストローの先端は表側の前記襞の溝部に力が掛かって前記ストロー開口部が湾曲するように液体食品容器の内部に押込まれて、前記表側の溝から隣接する前記裏側の溝に亘る水平部が徐々に垂直方向に傾く。そして、前記水平部の厚さが、前記表側の溝から前記裏側の襞に亘る前記垂直部の厚さより薄く形成された易破断部なのでストローで容易に貫通し突刺すことができる。   According to the first aspect of the present invention, when a straw is pierced into the straw opening, the tip of the straw is applied to the front groove of the trough so that the straw opening is curved inside the liquid food container. When pushed, the horizontal portion from the front groove to the adjacent back groove gradually tilts in the vertical direction. And since the thickness of the said horizontal part is an easily breakable part formed thinner than the thickness of the said perpendicular part ranging from the said groove | channel on the front side to the said ridge on the back side, it can penetrate easily and stab with a straw.

さらに、前記垂直部の厚さが前記水平部の厚さがより厚いので、搬送時等に前記ストロー開口部に対して垂直方向に外力が掛かっても前記ストロー開口部は表側と裏側に形成される複数の襞によって充分な強度を備えているので、搬送時の振動等の外力で破断することがない。   Further, since the vertical portion is thicker than the horizontal portion, the straw opening is formed on the front side and the back side even when an external force is applied in the vertical direction to the straw opening during transportation or the like. Since the plurality of wrinkles have sufficient strength, they are not broken by an external force such as vibration during conveyance.

請求項2の発明によれば、表側の隣接する前記襞によってストローの先端が安定して保持されるので、前記ストロー開口部が確実且つ安定して液体食品容器の内部に湾曲して押込まれるので請求項1の発明の効果がさらに確実に得られる。   According to invention of Claim 2, since the front-end | tip of the straw adjacent to the front side is stably hold | maintained, the said straw opening part is curvedly pushed into the inside of a liquid food container reliably and stably. Therefore, the effect of the invention of claim 1 can be obtained more reliably.

請求項3の発明によれば、請求項1又は請求項2の発明の効果に加えて、前記ストロー開口部は平面視三角星形に形成されるので、デザイン的効果が得られるので商品価値が向上する。   According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, the straw opening is formed in a triangular star shape in plan view, so that a design effect is obtained, so that the commercial value is obtained. improves.

請求項4の発明によれば、請求項1又は請求項2の発明の効果に加えて、前記ストロー開口部は外形U字形状に形成されるので、ストローがU字形状の円弧部に支えられて挿入できるため、前記ストロー開口部を確実に安定して切断できる。   According to the invention of claim 4, in addition to the effect of the invention of claim 1 or 2, the straw opening is formed in a U-shaped outer shape, so that the straw is supported by the U-shaped arc portion. Therefore, the straw opening can be reliably and stably cut.

請求項5の発明によれば、請求項1乃至請求項4のいずれか一項の発明の効果に加えて、複数の襞が平面視S字状で形成されるので前記襞の易破断部の全長が長くなるため、ストローを突刺すと前記ストロー開口部がさらに小さい力で押込まれて容易に湾曲して切断できるので操作性が向上する。   According to the invention of claim 5, in addition to the effect of the invention of any one of claims 1 to 4, the plurality of ridges are formed in an S shape in plan view, so Since the overall length becomes long, when the straw is pierced, the straw opening is pushed with a smaller force and can be easily bent and cut, so that the operability is improved.

<本発明の第一の実施形態>
<液体食品容器のストロー開口部構造の構成>
以下に、本発明の第一の実施形態を図1〜8に基づいて説明する。
図1、図2、図3に示すように、液体食品容器1は、紙基材2の両面を熱可塑性樹脂3aで覆った包材4を縦シール5して筒状包材6に形成し、この筒状包材6の一端部6aに熱可塑性樹脂3bで四隅円弧状の矩形でドーム状の頂部8を形成し、他端部6bは横シール9で密封してその両端のフラップ部9aを折込んで底部10が形成される。
<First embodiment of the present invention>
<Structure of the structure of the straw opening of the liquid food container>
Below, 1st embodiment of this invention is described based on FIGS.
As shown in FIGS. 1, 2, and 3, the liquid food container 1 is formed into a cylindrical packaging material 6 by vertically sealing a packaging material 4 in which both sides of a paper base material 2 are covered with a thermoplastic resin 3 a. The cylindrical packaging material 6 has one end 6a formed of a thermoplastic resin 3b and a rectangular dome-shaped top 8 formed of a four-corner arc, and the other end 6b is sealed with a horizontal seal 9 and the flaps 9a at both ends thereof are sealed. The bottom 10 is formed by folding.

ドーム状の中央部の頂部8には小さなドーム状のキャップ12を備え、このキャップ12の略1/6円弧領域にさらに一段低いドーム部12aが形成され、このドーム部12aにストロー13を突刺してジュース等の内容液11を飲用するためのストロー開口部15が平面視三角星形状で形成される。   A small dome-shaped cap 12 is provided on the top 8 of the dome-shaped central portion, and a dome portion 12a that is one step lower is formed in a substantially 1/6 arc region of the cap 12, and a straw 13 is inserted into the dome portion 12a. The straw opening 15 for drinking the content liquid 11 such as juice is formed in a triangular star shape in plan view.

ここで、包材4には折込み容易とするため溝状のクリース線が形成されるが、頂部8近傍における縦シール5にクリース線は形成されないので、液体食品容器1に内容液11が充填された状態で頂部8近傍は水平断面視で四隅円弧状の矩形に容易に形成される。   Here, a groove-like crease line is formed in the packaging material 4 for easy folding, but since the crease line is not formed in the vertical seal 5 in the vicinity of the top 8, the liquid food container 1 is filled with the content liquid 11. In this state, the vicinity of the top 8 is easily formed into a four-corner arc-shaped rectangle in a horizontal sectional view.

ドーム部12aの裾部には図示しない弱め線12bが形成されているので、内容液11を飲用する際に把持部14を持って引上げることにより弱め線12bが破断してキャップ12を開封し、直接内容液を飲むこともできる。このとき、第一フック16が第二フック17に沿って滑り込んで保持部18に係止されるので、内容液を飲む場合にキャップ12が閉まる方向に戻らないように保持できる。   Since a weak line 12b (not shown) is formed at the skirt of the dome part 12a, the weak line 12b breaks when the content liquid 11 is swallowed and is pulled up, and the cap 12 is opened. You can also drink the liquid directly. At this time, since the first hook 16 slides along the second hook 17 and is locked to the holding portion 18, the cap 12 can be held so as not to return in the closing direction when drinking the content liquid.

<液体食品容器の製造工程の説明>
ここで、液体食品容器1の製造工程の一例を図4、図5に基づいて説明する。なお、図1、図2、図3で説明した液体食品容器1と同構成部分についてはその名称と符合を適宜用いて説明し、重複した説明は省略する。
<Description of manufacturing process of liquid food container>
Here, an example of the manufacturing process of the liquid food container 1 is demonstrated based on FIG. 4, FIG. In addition, about the same component as the liquid food container 1 demonstrated in FIG.1, FIG.2, FIG.3, it demonstrates using the name and the code | symbol suitably, and the overlapping description is abbreviate | omitted.

図4に示すように、繰出工程31において、リール状に巻かれた帯状の包材4を連続的に繰出す。包材4の紙基材2には成形しやすいように予め折り目線が形成され、紙基材2の外面に熱可塑性樹脂3aとしての低密度ポリエチレン(LDPE)が用いられ、その外面又は内面にデザイン等の印刷が施される。紙基材2の内面には熱可塑性樹脂3aとして低密度ポリエチレン(LDPE)、高密度ポリエチレン(HDPE)、ポリプロピレン(PP)、ポリエステル(PET)等が用いられ、必要によりアルミ箔等の酸素バリア層を備える。   As shown in FIG. 4, in the feeding process 31, the strip-shaped packaging material 4 wound in a reel shape is continuously fed out. The paper base 2 of the packaging material 4 is formed with a crease line in advance so as to be easily molded, and low density polyethylene (LDPE) as the thermoplastic resin 3a is used on the outer surface of the paper base 2, and on the outer or inner surface thereof. Printing of design etc. is given. The inner surface of the paper base 2 is made of low density polyethylene (LDPE), high density polyethylene (HDPE), polypropylene (PP), polyester (PET) or the like as the thermoplastic resin 3a. If necessary, an oxygen barrier layer such as aluminum foil Is provided.

切断工程32において、図示しない切断具によって包材4を所定の長さのシート32aに横切断する。   In the cutting step 32, the packaging material 4 is horizontally cut into a sheet 32a having a predetermined length by a cutting tool (not shown).

縦シール工程33において、シート32aの両側端部を縦シール5して矩形の筒状包材6が形成される。筒状包材6は搬送手段としてのマンドレル34に底部10側(この時点では底部10そのものは未だ形成されていない)から挿入され、マンドレル34の90度回転に伴って下方のインジェクション成形工程35に送られる。なお、マンドレル34は2列配備されている。   In the longitudinal sealing step 33, the both ends of the sheet 32a are longitudinally sealed 5 to form a rectangular tubular packaging material 6. The cylindrical packaging material 6 is inserted into a mandrel 34 as a conveying means from the bottom 10 side (the bottom 10 itself has not yet been formed at this time), and enters the lower injection molding process 35 as the mandrel 34 rotates 90 degrees. Sent. Note that two rows of mandrels 34 are provided.

インジェクション成形工程35において、可動金型36が矢印で示すように上昇して可動金型36の凹部36aが筒状包材6の頂部側の端部6a及びその近傍を閉囲する。マンドレル34の先端部には凸部34aが形成されている。凹部36aと凸部34aの間に形成される図示しないキャビティ空間にノズル36bから熱可塑性樹脂3bを射出して端部6aの周囲を包み込みドーム状の頂部8が形成される。なお、熱可塑性樹脂3bを射出すると同時に図示されない空気抜きから空気が抜けるようになっており、射出完了後に可動金型36が矢印で示すように下降する。   In the injection molding step 35, the movable mold 36 is raised as indicated by the arrow, and the concave portion 36a of the movable mold 36 closes the end 6a on the top side of the cylindrical packaging material 6 and the vicinity thereof. A convex portion 34 a is formed at the tip of the mandrel 34. A thermoplastic resin 3b is injected from a nozzle 36b into a cavity space (not shown) formed between the concave portion 36a and the convex portion 34a to wrap around the end portion 6a to form a dome-shaped top portion 8. At the same time as the injection of the thermoplastic resin 3b, air is released from an air vent (not shown), and the movable mold 36 is lowered as indicated by an arrow after completion of the injection.

なお、インジェクション成形工程35の概要説明容易のため単純な形状の凹部36aと凸部34aを用いたが、実際の頂部8は四隅円弧状のドーム形状の中央部にストロー開口部15を備えたドーム状のキャップ12が形成されて成る二重ドーム形状である。このため、説明しない特殊な金型を用いることで、頂部8、キャップ12(把持部14、ストロー開口部15、第一フック16、第二フック17、保持部18)等の熱可塑性樹脂部分が全て同時に成形される。二重ドーム形状をインジェクション成形した後、筒状包材6はマンドレル34に装着されて角度90度回転して水平状態に上昇する。   In addition, for easy explanation of the outline of the injection molding process 35, the simple concave portion 36a and convex portion 34a are used, but the actual top portion 8 is a dome having a straw opening 15 at the center of a four-corner arc-shaped dome shape. It is a double dome shape in which a cap 12 is formed. For this reason, by using a special mold not described, the thermoplastic resin parts such as the top 8 and the cap 12 (the gripping part 14, the straw opening part 15, the first hook 16, the second hook 17, and the holding part 18) are removed. All are molded simultaneously. After injection molding the double dome shape, the tubular packaging material 6 is mounted on the mandrel 34 and rotated 90 degrees to rise to a horizontal state.

充填工程37において、頂部8が形成された水平状態の筒状包材6がマンドレル34から離れてカセット部37bに頂部8の方から挿入され、カセットコンベヤー37aによって筒状包材6の開放状態の底部10側を上方にして水平搬送される。その途中で貯蔵タンク37cから底部10側に内容液11であるジュース等が充填される。その後、図示しないシール装置によって底部10を矩形状に形成して液体食品容器1が完成する。液体食品容器1はカセットコンベヤー37aの終端部で180度回転してカセット部37bから自然落下して離脱し、頂部8を上方に向けた状態で搬出される。   In the filling step 37, the horizontal cylindrical packaging material 6 on which the top portion 8 is formed is separated from the mandrel 34 and inserted into the cassette portion 37b from the top portion 8, and is opened by the cassette conveyor 37a. It is transported horizontally with the bottom 10 side up. In the middle of the process, juice or the like as the content liquid 11 is filled from the storage tank 37c to the bottom 10 side. Thereafter, the bottom portion 10 is formed in a rectangular shape by a sealing device (not shown) to complete the liquid food container 1. The liquid food container 1 is rotated 180 degrees at the end of the cassette conveyor 37a, spontaneously falls off the cassette portion 37b and is removed, and is transported with the top portion 8 facing upward.

図6、図7に示すように、キャップ12の略1/6円弧領域(θ≒60度)の一段低いドーム部12aに形成されるストロー開口部15は水平状に形成される。ストロー開口部15の平面視三角星形状は、点F1、点F2、点F3で囲まれた三角形15aと、点F1、点F2と他の点F4で囲まれた三角形15bと、点F2、点F3と他の点F5で囲まれた三角形15cと、点F3、点F1と他の点F6で囲まれた三角形15dと、を連結される。ここで、三角形15b、15c、15dの連結する一対の辺で形成される角度θ1、θ2、θ3が180度より小さく形成される。   As shown in FIGS. 6 and 7, the straw opening 15 formed in the dome portion 12 a that is one step lower than the approximately 1/6 arc region (θ≈60 degrees) of the cap 12 is formed in a horizontal shape. The three-dimensional star shape of the straw opening 15 in plan view includes a triangle 15a surrounded by points F1, F2, and F3, a triangle 15b surrounded by points F1, F2, and another point F4, a point F2, a point A triangle 15c surrounded by F3 and another point F5 is connected to a triangle 15d surrounded by point F3, point F1 and another point F6. Here, angles θ1, θ2, and θ3 formed by a pair of sides connected by the triangles 15b, 15c, and 15d are formed to be smaller than 180 degrees.

三角形15cの頂点としての点F5と、三角形15bと三角形15dの共通する底辺の点F1と、を結ぶ線の延長線上にキャップ12の略中心Fが位置する。点F1、点F2、点F3を包含して形成される円形領域Sは直径P2=6mmで、直径6mmのストロー13が差込まれる領域である。   The approximate center F of the cap 12 is located on an extension of a line connecting the point F5 as the vertex of the triangle 15c and the base point F1 common to the triangle 15b and the triangle 15d. A circular region S formed including the points F1, F2, and F3 is a region where the diameter P2 = 6 mm and the straw 13 having a diameter of 6 mm is inserted.

ストロー開口部15の表裏側の両面に複数の凸状の襞M1、M2が平行に等間隔Pで形成され、襞M1、M2は断面が略半円形状で同じ大きさである。表側の襞M1の溝部N1と裏側の襞M2の溝部N2は同一水平面上で水平部Q1の厚さ=0.1mmずれて形成される。襞M1、襞M2の頂部近傍は半径R=0.25mmで襞M1と襞M2を合わせた全厚さが Hである。ここで、表側の襞M1の溝部N1から裏側の襞M2への垂直部Q2の厚さと、水平部Q1との関係は、Q1<Q2の関係で、水平部Q1が易破断部として形成される。   A plurality of convex ridges M1 and M2 are formed in parallel at equal intervals P on both the front and back sides of the straw opening 15, and the ridges M1 and M2 have a substantially semicircular cross section and the same size. The groove portion N1 of the front side ridge M1 and the groove portion N2 of the back side ridge M2 are formed on the same horizontal plane with a thickness of the horizontal portion Q1 = 0.1 mm. The vicinity of the tops of 襞 M1 and 襞 M2 has a radius R = 0.25 mm and the total thickness of 襞 M1 and 襞 M2 is H. Here, the relationship between the thickness of the vertical portion Q2 from the groove portion N1 of the front side ridge M1 to the back side ridge M2 and the horizontal portion Q1 is such that Q1 <Q2, and the horizontal portion Q1 is formed as an easily breakable portion. .

図8に示すように、表側の襞M1の溝部N1にストロー13の先端部を突刺すと、表側の襞M1と溝部N1が下降するとともに裏側の襞M1と溝部N2も下降する。そして、Q1<Q2の関係なので最終的に薄肉部である水平部Q1が略垂直状態に成った時点で破断する。   As shown in FIG. 8, when the leading end of the straw 13 is pierced into the groove N1 of the front ridge M1, the front ridge M1 and the groove N1 are lowered, and the back ridge M1 and the groove N2 are also lowered. Since the relationship of Q1 <Q2 is established, the thin portion is finally broken when the horizontal portion Q1 is substantially vertical.

<液体食品容器のストロー開口部構造の作用>
ストロー開口部15は易破断部として薄厚の水平部Q1を備えて一体形成されるが、ストロー開口部15の表裏側にそれぞれ複数で断面同形の襞M1、M2を略半円形状で備えるのでストロー開口部15の強度が向上する。そして、水平部Q1<垂直部Q2の関係なので、ストロー開口部15が水平部Q1の厚さと同じ厚さで全面形成された状態に比較して、ストロー開口部15に対する直角方向の剪断力に対抗する強度が増加するので搬送・流通過程で振動等の外力で破断したり漏れることがない。ストローを突刺して開封するときには易破断部である水平部Q1を容易に貫通できる。このように、ストローを突刺す際にストローが滑って貫通し難く、また、ストロー開口部15が硬くてストロー先端部が曲がってしまうという問題が解消できる。なお、易破断部としての水平部Q1の厚さは0.1mmに拘らず使用する熱可塑性樹脂の特性に応じて決められる。
<Operation of the straw opening structure of the liquid food container>
Although the straw opening 15 is integrally formed with a thin horizontal portion Q1 as an easily breakable portion, the straw opening 15 is provided with a plurality of bowls M1 and M2 having the same cross section on the front and back sides of the straw opening 15 in a substantially semicircular shape. The strength of the opening 15 is improved. Since the relationship of horizontal portion Q1 <vertical portion Q2 is satisfied, it opposes the shearing force in the direction perpendicular to the straw opening portion 15 as compared with the state where the straw opening portion 15 is entirely formed with the same thickness as the horizontal portion Q1. Since the strength to be increased increases, it does not break or leak due to external force such as vibration during the conveyance / distribution process. When the straw is pierced and opened, the horizontal portion Q1, which is an easily breakable portion, can be easily penetrated. As described above, when the straw is pierced, it is difficult for the straw to slide and penetrate, and the problem that the straw opening 15 is hard and the leading end of the straw is bent can be solved. In addition, the thickness of the horizontal part Q1 as an easily breakable part is determined according to the characteristic of the thermoplastic resin to be used irrespective of 0.1 mm.

このように、ストロー開口部15が適度な強度と容易な開封性を兼ね添えるのでその信頼性が増すので内容液の劣化が防止できて衛生性が向上し、紙容器の品質が向上し商品価値を高めることができる。さらに、ストロー開口部15の平面視三角星形状は、三角形15b、15c、15dの連結する一対の辺で形成される角度θ1、θ2、θ3が180度より小さく形成されるので外観に優れたデザイン的効果によって品質価値が向上する。   Thus, since the straw opening 15 combines moderate strength and easy opening, its reliability increases, so the deterioration of the liquid content can be prevented, hygiene is improved, the quality of the paper container is improved, and the commercial value Can be increased. Furthermore, the triangular opening in the plan view of the straw opening 15 has an excellent appearance because the angles θ1, θ2, and θ3 formed by a pair of sides connecting the triangles 15b, 15c, and 15d are smaller than 180 degrees. The quality value is improved by the effective effect.

<本発明の第二の実施形態>
本発明の第二の実施形態の液体食品容器のストロー開口部構造を、図9を用いて説明するが、図7に示すストロー開口部の断面図と同様の構成部分については、図面に同符号を付して重複した説明を省略する。なお、ストロー開口部の平面図は図6に示す構成と同じであるためその説明および図面を省略する。
<Second embodiment of the present invention>
The structure of the straw opening of the liquid food container according to the second embodiment of the present invention will be described with reference to FIG. 9, and the same components as those in the cross-sectional view of the straw opening shown in FIG. A duplicate description is omitted. The plan view of the straw opening is the same as that shown in FIG.

ストロー開口部15の表裏側の両面に複数の襞M1、M2が平行に等間隔P1で形成され、襞M1、M2の断面は半径R1の弓形状で、表側の襞M1の溝部N1と裏側の襞M2の溝部N2の水平部Q1=0.1mmで形成される。表側の襞M1の溝部N1から裏側の襞M2への垂直部Q3とすると、Q1<Q3の関係に形成される。この場合、本発明の第一の実施形態に比べて、襞M1、M2のそれぞれの間隔が同じP1=Pとした場合、襞M1と襞M2を合わせた全厚さH1が薄く( H1<H )なるので、搬送時の想定される外力が小さい場合に使用できる断面形状である。   A plurality of ridges M1 and M2 are formed in parallel at equal intervals P1 on both the front and back sides of the straw opening 15. The cross-sections of the ridges M1 and M2 have an arc shape with a radius R1, and the groove N1 and the back side of the ridge M1 on the front side The horizontal portion Q1 of the groove portion N2 of the flange M2 is formed with 0.1 mm. When the vertical portion Q3 from the groove portion N1 of the front side ridge M1 to the back side ridge M2 is formed, a relationship of Q1 <Q3 is formed. In this case, compared to the first embodiment of the present invention, when the distance between 襞 M1 and M2 is the same as P1 = P, the total thickness H1 of 襞 M1 and 襞 M2 is thin (H1 <H Therefore, the cross-sectional shape can be used when the assumed external force during conveyance is small.

<本発明の第三の実施形態>
本発明の第三の実施形態の液体食品容器のストロー開口部構造を、図10を用いて説明するが、図6に示すストロー開口部の平面図と同構成部分については、図面に同符号を付して重複した説明を省略する。なお、ストロー開口部の断面図は図7に示す構成と同様であるためその説明および図面を省略する。
<Third embodiment of the present invention>
Although the straw opening part structure of the liquid food container of the third embodiment of the present invention will be described with reference to FIG. 10, the same reference numerals are used for the same components in the plan view of the straw opening part shown in FIG. A duplicate description will be omitted. The sectional view of the straw opening is the same as that shown in FIG.

図10に示すように、ストロー開口部15は外形U字形状に形成される。この場合、表側の襞M1の溝部N1と裏側の襞M2の溝部N2が7組設けられる。このため、表側の溝部N1にストロー13を突刺すと、図7の場合の三組に比べて凸状襞の溝部N1、N2の数が多いためストロー開口部15の断面剛性が小さいので容易に下降して薄肉部である易破断部としての水平部Q1を速やかに破断できる。また、ストロー13が下降する際に外形U字形状によってストロー13がガイドされるのでストロー13は安定して下降できるので、ストロー開口部15の貫通作業が迅速に安定して実施できる。   As shown in FIG. 10, the straw opening 15 is formed in a U-shaped outer shape. In this case, seven sets of the groove portion N1 of the front side ridge M1 and the groove portion N2 of the back side ridge M2 are provided. For this reason, when the straw 13 is pierced into the groove portion N1 on the front side, since the number of the groove portions N1 and N2 of the convex ridges is larger than the three pairs in the case of FIG. The horizontal part Q1 as an easily breakable part which descends and is a thin part can be quickly broken. Further, since the straw 13 is guided by the outer U-shape when the straw 13 is lowered, the straw 13 can be stably lowered, so that the operation of penetrating the straw opening 15 can be performed quickly and stably.

<本発明の第四の実施形態>
本発明の第四の実施形態の液体食品容器のストロー開口部構造を、図11を用いて説明するが、図10に示すストロー開口部の断面図と同構成部分については、図面に同符号を付して重複した説明を省略する。なお、ストロー開口部の断面図は図7に示す構成と同様であるためその説明および図面を省略する。
<Fourth embodiment of the present invention>
Although the straw opening part structure of the liquid food container of the fourth embodiment of the present invention will be described with reference to FIG. 11, the same reference numerals are used in the drawings for the same components as the sectional view of the straw opening part shown in FIG. A duplicate description will be omitted. The sectional view of the straw opening is the same as that shown in FIG.

図11に示すように、ストロー開口部15の表裏側の複数の断面同形状の襞M1の溝部N1と裏側の襞M2の溝部N2が7組で平面視S字状に形成されるので、溝部N1、N2の延べ長さが増加する。このため、図10の場合に比べてさらに断面剛性が下がるので、表側の溝部N1にストローを突刺すと、さらに容易に下降して易破断部としての水平部Q1を迅速に安定して破断できる。   As shown in FIG. 11, the groove portion N1 of the ridge M1 having the same cross section on the front and back sides of the straw opening portion 15 and the groove portion N2 of the ridge M2 on the back side are formed in an S-shape in plan view in seven sets. The total length of N1 and N2 increases. For this reason, since the cross-sectional rigidity is further reduced as compared with the case of FIG. 10, when the straw is inserted into the groove N1 on the front side, the horizontal part Q1 as the easily breakable part can be quickly and stably broken. .

以上、本発明の実施例を図面に基づいて説明したが、具体的な構成はこの実施例に限られるものではなく本発明の要旨を逸脱しない範囲の設計変更等があっても本発明に含まれる。   The embodiment of the present invention has been described with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within the scope of the present invention are included in the present invention. It is.

ドーム部12aに水平状に形成されるストロー開口部15はドーム部12aの形状に合わせて球面状に形成しても構わない。この場合、溝部N1と溝部N2は同一球面上に形成され、水平部Q1は球面に沿って略水平状態で、垂直部Q2は球面に対して垂直状態に形成される。   The straw opening 15 formed horizontally in the dome portion 12a may be formed in a spherical shape in accordance with the shape of the dome portion 12a. In this case, the groove portion N1 and the groove portion N2 are formed on the same spherical surface, the horizontal portion Q1 is formed in a substantially horizontal state along the spherical surface, and the vertical portion Q2 is formed in a vertical state with respect to the spherical surface.

形成される溝部の組数はストロー開口部15に求められる剛性と開口性能としての開け易さとのバランスで設定される。例えば、第一の実施形態におけるストロー開口部15の表裏側にストロー13に対応して設けられる三組の溝部は、三組に限らず任意に必要組数が選定できる。   The number of sets of grooves to be formed is set by a balance between rigidity required for the straw opening 15 and easy opening as opening performance. For example, the number of sets of three sets of grooves provided on the front and back sides of the straw opening 15 corresponding to the straw 13 in the first embodiment is not limited to three, and the required number of sets can be arbitrarily selected.

ストロー開口部の表裏側の襞の断面形状は半円形状の替わりに半長円形状や台形形状でも構わない。ストロー開口部15はストローの外形状に合わせて直径6mmの円形形状でもよく、直径6mm以外のストロー径に対応して決定してもよい。ストロー13の先端部は表側の襞M1の溝部N1に突刺しても表側の襞M1に突刺してもよい。液体食品容器1の形状は、8角柱状、容器頂面および底面が4角形で胴体部が8角形の柱状液体食品容器等々色んな形状の液体食品容器に応用可能である。   The cross-sectional shape of the ridges on the front and back sides of the straw opening may be a semi-oval or trapezoid instead of a semi-circle. The straw opening 15 may have a circular shape with a diameter of 6 mm in accordance with the outer shape of the straw, or may be determined corresponding to a straw diameter other than the diameter of 6 mm. The leading end of the straw 13 may pierce the groove N1 of the front side ridge M1, or may pierce the front side ridge M1. The shape of the liquid food container 1 can be applied to liquid food containers of various shapes such as an octagonal columnar shape, a rectangular top shape and bottom surface of the container, and an octagonal body shape of the body portion.

本発明の第一の実施形態における、液体食品容器1の側面図である。It is a side view of the liquid food container 1 in 1st embodiment of this invention. 本発明の第一の実施形態における、図1のA―斜視図である。FIG. 2 is an A-perspective view of FIG. 1 in the first embodiment of the present invention. 本発明の第一の実施形態における、図1のB−B矢視図である。It is a BB arrow line view of Drawing 1 in a first embodiment of the present invention. 本発明の第一の実施形態における、液体食品容器1の製造工程を示す斜視図である。It is a perspective view which shows the manufacturing process of the liquid food container 1 in 1st embodiment of this invention. 本発明の第一の実施形態における、液体食品容器1のドーム状の頂部8を形成するインジェクション成形工程35で、マンドレル34に挿入された筒状包材6と可動金型36との状態を示す一部透視側面図である。The state of the cylindrical packaging material 6 inserted in the mandrel 34 and the movable mold 36 in the injection molding step 35 for forming the dome-shaped top 8 of the liquid food container 1 in the first embodiment of the present invention is shown. It is a partial perspective side view. 本発明の第一の実施形態における、ストロー開口部15の詳細平面図である。It is a detailed top view of the straw opening part 15 in 1st embodiment of this invention. 本発明の第一の実施形態における図6のC―C断面図である。It is CC sectional drawing of FIG. 6 in 1st embodiment of this invention. 本発明の第一の実施形態における図6の状態からストロー開口部15をストロー13で押込んで破断する状態を示すイメージ断面図である。It is image sectional drawing which shows the state which pushes the straw opening part 15 with the straw 13 from the state of FIG. 6 in 1st embodiment of this invention, and fractures | ruptures it. 本発明の第二の実施形態における、断面弓形状の襞M1、M2が形成されたストロー開口部15の状態を示す断面図である。It is sectional drawing which shows the state of the straw opening part 15 in which the cross-sectional bow-shaped ridges M1 and M2 were formed in 2nd embodiment of this invention. 本発明の第三の実施形態における、外形U字形状のストロー開口部15の状態を示す平面図である。It is a top view which shows the state of the straw opening part 15 of the external shape U shape in 3rd embodiment of this invention. 本発明の第四の実施形態における、外形U字形状のストロー開口部15に平面視S字状の襞M1、M2が形成された状態を示す平面図である。It is a top view which shows the state by which the planar view S-shaped ridges M1 and M2 were formed in the straw opening part 15 of the external shape U-shape in 4th embodiment of this invention. 従来例における、(a)は液体食品容器115に設けられるストロー孔116の断面図、(b)はストロー孔116の平面図である。In the conventional example, (a) is a sectional view of the straw hole 116 provided in the liquid food container 115, and (b) is a plan view of the straw hole 116.

符号の説明Explanation of symbols

13 ストロー
15 ストロー開口部
M1 襞
M2 襞
N1 溝部
N2 溝部
Q1 水平部
Q2 垂直部
13 Straw 15 Straw opening M1 M M2 襞 N1 Groove N2 Groove Q1 Horizontal Q2 Vertical

Claims (5)

紙基材を熱可塑性樹脂で覆った包材で底部と側部を形成し頂部が熱可塑性樹脂で形成されて成る液体食品容器のストロー開口部の構造であって、
前記ストロー開口部は前記頂部と一体的に形成され、前記ストロー開口部の表側と裏側に複数の襞を平行に備え、表側の前記襞の溝部と裏側の前記襞の溝部は同一水平面上でずれて形成され、
前記表側の溝から隣接する前記裏側の溝に亘る水平部の厚さが、前記表側の溝から前記裏側の襞に亘る垂直部の厚さより薄く形成され、前記水平部が易破断部であることを特徴とする液体食品容器のストロー開口部構造。
The structure of the straw opening of a liquid food container, wherein the bottom and sides are formed with a packaging material in which a paper base material is covered with a thermoplastic resin, and the top is formed with a thermoplastic resin,
The straw opening is formed integrally with the top, and has a plurality of ridges in parallel on the front side and the back side of the straw opening, and the groove portion of the ridge on the front side and the groove portion of the ridge on the back side are shifted on the same horizontal plane. Formed,
The horizontal portion extending from the front groove to the adjacent back groove is thinner than the vertical portion extending from the front groove to the back flange, and the horizontal portion is an easily breakable portion. A straw opening structure for a liquid food container.
前記襞の断面形状は同じ大きさで略半円形状又は弓形状に形成されることを特徴とする請求項1に記載の液体食品容器のストロー開口部構造。   2. The straw opening structure for a liquid food container according to claim 1, wherein the cross-sectional shapes of the bowls are the same size and are formed in a substantially semicircular shape or a bow shape. 前記ストロー開口部は平面視三角星形状に形成されることを特徴とする請求項1又は請求項2に記載の液体食品容器のストロー開口部構造。   The said straw opening part is formed in planar view triangular star shape, The straw opening part structure of the liquid food container of Claim 1 or Claim 2 characterized by the above-mentioned. 前記ストロー開口部は平面視U字形状に形成されることを特徴とする請求項1又は請求項2に記載の液体食品容器のストロー開口部構造。   The said straw opening part is formed in planar view U shape, The straw opening part structure of the liquid food container of Claim 1 or Claim 2 characterized by the above-mentioned. 前記複数の襞は平面視S字状で形成されることを特徴とする請求項1乃至請求項4のいずれか一項に記載の液体食品容器のストロー開口部構造。   The straw opening structure for a liquid food container according to any one of claims 1 to 4, wherein the plurality of troughs are formed in an S shape in a plan view.
JP2008288585A 2008-11-11 2008-11-11 Straw opening structure of liquid food container Expired - Fee Related JP5216539B2 (en)

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WO2011001901A1 (en) * 2009-06-28 2011-01-06 テトラ ラバル ホールディングス アンド ファイナンス エス エイ Opening device for straws for liquid food containers
JP2012153382A (en) * 2011-01-24 2012-08-16 Asahi Kasei Pax Corp Container lid
EP2599731A1 (en) * 2010-07-31 2013-06-05 Tetra Laval Holdings & Finance SA Opening device for liquid food container and liquid food container
CN106742711A (en) * 2016-12-27 2017-05-31 广州市铭钰标识科技有限公司 A kind of rim of a cup closure
JP2020114753A (en) * 2013-03-12 2020-07-30 アボット・ラボラトリーズAbbott Laboratories Septum and related method

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JP2002308332A (en) * 2001-04-17 2002-10-23 Tokan Kogyo Co Ltd Vessel
JP2005035573A (en) * 2003-07-17 2005-02-10 Nihon Tetra Pak Kk Packaging container
JP2007537944A (en) * 2004-05-18 2007-12-27 インターナショナル・ペーパー・カンパニー Breakable opening for sealed containers

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JPS60110268U (en) * 1983-12-28 1985-07-26 大日本印刷株式会社 Containers with pierceable parts
JP2002308332A (en) * 2001-04-17 2002-10-23 Tokan Kogyo Co Ltd Vessel
JP2005035573A (en) * 2003-07-17 2005-02-10 Nihon Tetra Pak Kk Packaging container
JP2007537944A (en) * 2004-05-18 2007-12-27 インターナショナル・ペーパー・カンパニー Breakable opening for sealed containers

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011001901A1 (en) * 2009-06-28 2011-01-06 テトラ ラバル ホールディングス アンド ファイナンス エス エイ Opening device for straws for liquid food containers
JP2011026006A (en) * 2009-06-28 2011-02-10 Nihon Tetra Pak Kk Opening device for straws of liquid food container
US8701917B2 (en) 2009-06-28 2014-04-22 Tetra Laval Holdings & Finance S.A. Opening device for straws of liquid food container
EP2599731A1 (en) * 2010-07-31 2013-06-05 Tetra Laval Holdings & Finance SA Opening device for liquid food container and liquid food container
EP2599731A4 (en) * 2010-07-31 2014-03-19 Tetra Laval Holdings & Finance Opening device for liquid food container and liquid food container
JP2012153382A (en) * 2011-01-24 2012-08-16 Asahi Kasei Pax Corp Container lid
JP2020114753A (en) * 2013-03-12 2020-07-30 アボット・ラボラトリーズAbbott Laboratories Septum and related method
JP2022177164A (en) * 2013-03-12 2022-11-30 アボット・ラボラトリーズ Septum and related method
US11731134B2 (en) 2013-03-12 2023-08-22 Abbott Laboratories Septums and related methods
CN106742711A (en) * 2016-12-27 2017-05-31 广州市铭钰标识科技有限公司 A kind of rim of a cup closure

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