JP2008013239A

JP2008013239A - Spout, and paper container for liquid, which is attached with the same

Info

Publication number: JP2008013239A
Application number: JP2006188947A
Authority: JP
Inventors: Takashi Saito; 剛史齋藤
Original assignee: Toppan Printing Co Ltd
Current assignee: Toppan Inc
Priority date: 2006-07-10
Filing date: 2006-07-10
Publication date: 2008-01-24

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spout and paper container for liquid, which is attached with the same free from such problems that an annular incision is broken when welded to the paper container, or a pouring cylinder of the spout and a cap are welded to each other. <P>SOLUTION: The cap (20) is provided with an inner sealing ring (22), on the undersurface of its ceiling panel (21), whose outer peripheral surface comes into tight contact with the inner peripheral surface, in the vicinity of the end portion (141) of the spout (10), and is so constructed that a cap thread-engagement part (27) is formed on the inner peripheral surface of the cap peripheral wall, which is thread-engaged with a thread engagement part (13) provided on the outer peripheral surface of the pouring cylinder (14), while the vicinities of the end of the outer peripheral surface of the inner sealing ring is so formed as to be circumferentially equipped with a protrusion (26) gently projecting outward, and the wall thickness of the pouring cylinder section coming into close contact with the inner sealing ring is made equal to or thinner compared with the wall thickness of the inner sealing ring. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、容器頂部に超音波シール法により熱融着して突設されるスパウトとそのスパウトに螺着されるキャップとからなる液体用紙容器の口栓と該口栓を取り付けた液体用紙容器に関する。 The present invention relates to a liquid paper container stopper comprising a spout projecting from the top of the container by heat sealing by an ultrasonic sealing method and a cap screwed to the spout, and a liquid paper container having the stopper attached thereto. About.

従来、食品や非食品の液体内容物に使用される液体用紙容器には、使用時の使い易さ等を考慮して、例えば、図５に示すように、胴部（３）が四角柱状で、切り妻屋根型の頂部の傾斜板（４）の注出位置に、スパウト（１０）とキャップ（２０）とからなる口栓（１）を突設させた液体用紙容器（２）が広く使用されている。 Conventionally, in a liquid paper container used for liquid contents of food and non-food, in consideration of ease of use at the time of use, for example, as shown in FIG. The liquid paper container (2) with a spout (10) and a cap (1) made of a spout (10) and a cap (20) at the pouring position of the inclined plate (4) at the top of the gable roof type is widely used. Has been.

この口栓（１）のキャップ（２０）としては、特に密封性が要求される場合には、例えば、図４に示すように、キャップ（２０）の天板（２１）下面に、外周面をスパウト（１０）の注出筒（１４）の先端部内周面に密接するインナー封止リング（２２）と、このインナー封止リングの外側に、スパウトの注出筒（１４）の先端上面に先端を密接するコンタクト封止リング（２３）とを垂設し、また、内周面をスパウトの注出筒の先端部外周面に密接するアウター封止リング（２５）をキャップの周壁（２４）の上端部内周面に内側へ突設して、スパウトの注出筒（１４）の上端部の三箇所を封止するものが使用されていた（例えば、特許文献１参照）。 As the cap (20) of the spigot (1), when sealing performance is particularly required, for example, as shown in FIG. 4, an outer peripheral surface is provided on the lower surface of the top plate (21) of the cap (20). An inner sealing ring (22) that is in close contact with the inner peripheral surface of the tip of the spout tube (14) of the spout (10), and a tip on the top surface of the spout pipe (14) on the outside of the inner sealing ring And an outer sealing ring (25) which is in close contact with the outer peripheral surface of the tip of the spout tube of the spout is provided on the peripheral wall (24) of the cap. A device that protrudes inwardly on the inner peripheral surface of the upper end portion and seals the three portions of the upper end portion of the spout pipe (14) has been used (for example, see Patent Document 1).

上記先行技術文献を示す。
特開２００４−０５１１２６号公報。 The said prior art document is shown.
JP 2004-051126 A.

しかし、インナー封止リング（２２）が比較的短くて太いために、キャッピングの際、注出筒の先端部分（１４１）が外側に広げられ、その反作用でスパウトの閉鎖板（１５）がキャップ（２０）により押し下げられて、注出筒（１４）が内側に曲げられる。このため気密性は非常に高いが残留応力が高いため、紙容器傾斜板（４）への融着時に環状切り込み（１６）が切れたり、注出筒（１４）とキャップ（２０）が融着することがあった。 However, since the inner sealing ring (22) is relatively short and thick, the tip portion (141) of the dispensing cylinder is spread outward during capping, and the spout closure plate (15) is cap ( 20), and the dispensing cylinder (14) is bent inward. For this reason, since the airtightness is very high but the residual stress is high, the annular notch (16) is cut at the time of fusing to the paper container inclined plate (4), or the dispensing cylinder (14) and the cap (20) are fused. There was something to do.

この融着による問題を回避するような構造も使われているが、上述の場合と同様に注出筒が外側にクリープ変形し融着による問題は減るものの液シール性が劣るという問題が残る。 A structure that avoids the problem due to the fusion is also used, but the problem that the liquid sealing performance is inferior remains though the problem of the fusion is reduced because the pouring tube is creep-deformed outward as in the case described above.

本発明は、容器頂部に超音波シール法により熱融着して突設されるスパウトとそのスパウトに螺着されるキャップとからなる液体用紙容器の口栓に関する以上のような問題に鑑みてなされたもので、紙容器への融着時に環状切り込みが切れたり、注出筒とキャップが融着することのない口栓及び該口栓を取り付けた液体用紙容器を提供することを課題とする。 The present invention has been made in view of the above-described problems relating to the stopper of a liquid paper container comprising a spout that is thermally fused to the top of the container by an ultrasonic sealing method and a cap that is screwed to the spout. Therefore, it is an object of the present invention to provide a spigot in which an annular cut is not cut at the time of fusing to a paper container, and a pouring tube and a cap are not fused, and a liquid paper container to which the spigot is attached.

本発明の請求項１の発明は、液体用紙容器の口栓取り付け孔に突設されるスパウトと該スパウトに螺合させて装着されるキャップとからなる口栓において、
前記スパウトが、下端外周面に貼着リングが周設された台座リングの上面の内周縁部にキャップとの螺合部を外周面に有する注出筒が立設され、該注出筒の下方内面には閉鎖板
が設けられて内側が封止され、該閉鎖板の所定位置に環状切り込みが設けられて環状薄肉脆弱線が形成され、該環状薄肉脆弱線の内側近傍の上面の一側に、先端にプルリングを有する支柱が立設された構造からなり、
前記キャップが、天板の下面に前記スパウトの注出筒先端部近傍の内周面に外周面が密接するインナー封止リングが設けられ、キャップの周壁の内周面には、注出筒の外周面に設けられた螺合部と螺着可能なキャップ螺合部が形成された構造からなり、
前記インナー封止リングの外周面の先端部近傍は、外方に緩やかに突起した***部が周設された形状とすると共に、インナー封止リングに密接する注出筒部分の肉厚をインナー封止リングの肉厚に比較して同等又は薄くしたことを特徴とする、口栓である。 According to a first aspect of the present invention, there is provided a plug comprising a spout protruding from a plug mounting hole of a liquid paper container and a cap screwed onto the spout.
The spout is provided with a pouring tube standing on the outer peripheral surface of the upper peripheral surface of the pedestal ring having a sticking ring on the outer peripheral surface of the lower end. A closing plate is provided on the inner surface and the inner side is sealed, and an annular cut is provided at a predetermined position of the closing plate to form an annular thin fragile line, on one side of the upper surface near the inner side of the annular thin fragile line , Consisting of a structure in which a pillar having a pull ring at the tip is erected,
The cap is provided with an inner sealing ring whose outer peripheral surface is in close contact with the inner peripheral surface near the tip of the spout tube of the spout on the lower surface of the top plate, and the inner peripheral surface of the peripheral wall of the cap has It has a structure in which a screwing portion provided on the outer peripheral surface and a cap screwing portion that can be screwed are formed,
The vicinity of the tip of the outer peripheral surface of the inner sealing ring has a shape in which a protruding portion that protrudes gently outward is provided around the inner sealing ring. The plug is characterized in that it is equal or thinner than the thickness of the retaining ring.

このように請求項１記載の発明によれば、液体用紙容器の口栓取り付け孔に突設されるスパウトと該スパウトに螺合させて装着されるキャップとからなる口栓において、前記スパウトが、下端外周面に貼着リングが周設された台座リングの上面の内周縁部にキャップとの螺合部を外周面に有する注出筒が立設され、該注出筒の下方内面には閉鎖板が設けられて内側が封止され、該閉鎖板の所定位置に環状切り込みが設けられて環状薄肉脆弱線が形成され、該環状薄肉脆弱線の内側近傍の上面の一側に、先端にプルリングを有する支柱が立設された構造からなり、前記キャップが、天板の下面に前記スパウトの注出筒先端部近傍の内周面に外周面が密接するインナー封止リングが設けられ、キャップの周壁の内周面には、注出筒の外周面に設けられた螺合部と螺着可能なキャップ螺合部が形成された構造からなり、前記インナー封止リングの外周面の先端部近傍は、外方に緩やかに突起した***部が周設された形状とすると共に、インナー封止リングに密接する注出筒部分の肉厚をインナー封止リングの肉厚に比較して同等又は薄くしてあるので、インナー封止リングのみが外側に広がろうとすることで応力が他の部分に影響を及ぼすことがなくなり、また、インナー封止リングの先端部でシールを行うことでインナー封止リングが内側に撓み易くなり、キャップ樹脂の剛性が高いため、クリープ変形しにくくなり、口部も部分的に変形することでシール性も悪くならない。 As described above, according to the first aspect of the present invention, in the spigot comprising the spout protruding from the spigot mounting hole of the liquid paper container and the cap screwed onto the spout, the spout is: A pouring tube having a threaded portion with a cap on the outer peripheral surface is erected on the inner peripheral edge of the upper surface of the pedestal ring having an adhesive ring around the lower end outer peripheral surface, and closed on the lower inner surface of the pouring tube A plate is provided and the inside is sealed, and an annular cut is provided at a predetermined position of the closing plate to form an annular thin fragile wire, and a pull ring at the tip is formed on one side of the upper surface near the inside of the annular thin fragile wire. The cap is provided with an inner sealing ring in which the outer peripheral surface is in close contact with the inner peripheral surface near the tip of the spout tube of the spout on the lower surface of the top plate. Provided on the outer peripheral surface of the dispensing tube on the inner peripheral surface of the peripheral wall And a cap screwed portion that can be screwed together, and a protruding portion that protrudes gently outward is provided in the vicinity of the tip of the outer peripheral surface of the inner sealing ring. As the shape and the thickness of the portion of the pipe that is in close contact with the inner sealing ring are equal to or thinner than the thickness of the inner sealing ring, only the inner sealing ring will spread outward. By doing so, stress does not affect other parts, and by sealing at the tip of the inner sealing ring, the inner sealing ring is easily bent inward, and the cap resin has high rigidity. Creep deformation is difficult, and the mouth part is also partially deformed so that the sealing performance does not deteriorate.

また、請求項２の発明は、請求項１記載の口栓を熱融着により取り付けた液体用紙容器である。 The invention of claim 2 is a liquid paper container to which the cap of claim 1 is attached by heat fusion.

このように本発明の口栓は、容器頂部に熱融着する際の問題がなくなり、超音波シール性の高い口栓とすることができる。 Thus, the plug of the present invention eliminates the problem of heat-sealing to the top of the container, and can be a plug with a high ultrasonic sealing property.

本発明を一実施形態に基づいて以下に詳細に説明する。
本発明の口栓は、例えば、図５に示すように、液体用紙容器（２）の口栓取り付け孔に突設されるスパウト（１０）と、このスパウトに螺合させて装着されるキャップ（２０）とからなる口栓（１）である。スパウト（１０）や口栓（２０）は、ポリプロピレンなどの適度の剛性を有する熱可塑性樹脂を用いて射出成形法により作製される。 The present invention will be described in detail below based on one embodiment.
For example, as shown in FIG. 5, the spigot of the present invention includes a spout (10) protruding from a spigot attachment hole of the liquid paper container (2), and a cap (fitting to the spout by being screwed into the spout (10). 20). The spout (10) and the plug (20) are produced by an injection molding method using a thermoplastic resin having an appropriate rigidity such as polypropylene.

そしてスパウト（１０）の構造はつぎの通りである。すなわち、下端外周面に貼着リング（１１）が周設された台座リング（１２）の上面の内周縁部にキャップ（２０）との螺合部（１３）を外周面に有する注出筒（１４）が立設されている。 The structure of the spout (10) is as follows. That is, a pour cylinder (10) on the outer peripheral surface having a threaded portion (13) with the cap (20) on the inner peripheral edge of the upper surface of the pedestal ring (12) having the sticking ring (11) provided on the outer peripheral surface of the lower end. 14) is erected.

注出筒（１４）の下方内面には閉鎖板（１５）が設けられて内側が封止され、この閉鎖板（１５）の所定位置に、断面逆Ｖ字状又は断面Ｖ字状の環状切り込み（１６）が設けられ、対向面側に環状薄肉脆弱線（１７）が形成されている。 A closing plate (15) is provided on the lower inner surface of the dispensing tube (14) to seal the inside, and an annular cut having an inverted V-shaped cross section or a V-shaped cross section is formed at a predetermined position of the closing plate (15). (16) is provided, and an annular thin line of weakness (17) is formed on the opposite surface side.

この環状薄肉脆弱線（１７）の内側近傍の上面の一側に、先端に一般的には円形状又は
楕円形状のプルリング（１８）を有する支柱（１９）が立設された構造からなるものである（図２参照）。 It has a structure in which a column (19) having a generally circular or elliptical pull ring (18) is erected on one side of the upper surface in the vicinity of the inside of the annular thin weak line (17). Yes (see FIG. 2).

キャップ（２０）の構造はつぎの通りである。すなわち、天板（２１）の下面にスパウト（１０）の注出筒先端部（１４１）近傍の内周面に外周面が密接するインナー封止リング（２２）が設けられている。 The structure of the cap (20) is as follows. That is, an inner sealing ring (22) whose outer peripheral surface is in close contact with the inner peripheral surface in the vicinity of the extraction tube tip (141) of the spout (10) is provided on the lower surface of the top plate (21).

キャップの周壁（２４）の内周面には、注出筒の外周面に設けられた螺合部（１３）と螺着可能なキャップ螺合部（２７）が形成された構造からなるものである。 The inner peripheral surface of the peripheral wall (24) of the cap has a structure in which a screwing portion (13) provided on the outer peripheral surface of the dispensing tube and a cap screwing portion (27) that can be screwed are formed. is there.

そして、インナー封止リング（２２）の外周面の先端部近傍は、外方に緩やかに突起した***部（２６）が周設された形状とすると共に、インナー封止リング（２２）に密接する注出筒（１４）の肉厚をインナー封止リング（２２）の肉厚に比較して同等又は薄くしたことを特徴としている（図１参照）。 The vicinity of the distal end portion of the outer peripheral surface of the inner sealing ring (22) has a shape in which a protruding portion (26) that gently protrudes outward is provided around the inner sealing ring (22), and is in close contact with the inner sealing ring (22). The thickness of the dispensing tube (14) is equal to or thinner than the thickness of the inner sealing ring (22) (see FIG. 1).

より具体的な一例を記すと、キャップ外径（ａ）；２４．７ｍｍ、注出筒口径（ｂ）；１８．４ｍｍの場合で、インナー封止リングの高さ（ｃ）；５ｍｍ、インナー封止リングの最大肉厚（ｄ）；０．７ｍｍ（インナー封止リングの先端縁より１ｍｍ内側のライン（ｅ）で）、注出筒の肉厚（ｆ）；０．６ｍｍとした（図３参照）。 A more specific example is as follows: Cap outer diameter (a): 24.7 mm, pour cylinder diameter (b): 18.4 mm, inner seal ring height (c): 5 mm, inner seal The maximum thickness (d) of the stop ring: 0.7 mm (in the line (e) 1 mm inside the tip edge of the inner sealing ring), and the thickness (f) of the dispensing cylinder: 0.6 mm (FIG. 3) reference).

このような構造とすることにより、口栓を超音波シール法により紙容器の頂部に熱融着する際、閉鎖板の環状切り込みが切れたり、注出筒とキャップが融着するようなことがなくなり、シール性能の高い口栓とすることができた。 By adopting such a structure, when the spout is heat-sealed to the top of the paper container by the ultrasonic sealing method, the annular notch of the closing plate may be cut or the dispensing cylinder and the cap may be fused. It became a plug with high sealing performance.

本発明の口栓を液体用紙容器の口栓取り付け孔に突設した時の一実施例を示す、断面説明図である。FIG. 6 is a cross-sectional explanatory view showing an embodiment when the stopper of the present invention is projected from the stopper mounting hole of the liquid paper container. 本発明の口栓のスパウトの一実施例を示す、断面説明図である。It is sectional explanatory drawing which shows one Example of the spout of the spigot of this invention. 本発明のキャップのインナー封止リングとスパウトの注出筒との肉厚の関係の一実施例を示す、口栓の要部断面説図である。It is principal part sectional explanatory drawing which shows one Example of the thickness relationship between the inner sealing ring of the cap of this invention, and the extraction pipe | tube of a spout. 従来の口栓を液体用紙容器の口栓取り付け孔に突設した時の一実施例を示す、断面説明図である。It is sectional explanatory drawing which shows one Example when the conventional stopper is protrudingly provided in the stopper attachment hole of the liquid paper container. 口栓を頂部傾斜板に熱融着により取り付けた一例の液体用紙容器の斜視説明図である。It is perspective explanatory drawing of the liquid paper container of an example which attached the stopper to the top inclination board by heat sealing | fusion.

符号の説明Explanation of symbols

１‥‥口栓
２‥‥液体紙容器
３‥‥胴部
４‥‥傾斜板
１０‥‥スパウト
１１‥‥貼着リング
１２‥‥台座リング
１３‥‥螺合部
１４‥‥注出筒
１５‥‥閉鎖板
１６‥‥環状切り込み
１７‥‥環状薄肉脆弱線
１８‥‥プルリング
１９‥‥支柱
２０‥‥キャップ
２１‥‥天板
２２‥‥インナー封止リング
２３‥‥コンタクト封止リング
２４‥‥周壁
２５‥‥アウター封止リング
２６‥‥***部
２７‥‥キャップ螺合部
１４１‥‥注出筒先端部 DESCRIPTION OF SYMBOLS 1 ... Mouth stopper 2 ... Liquid paper container 3 ... Body part 4 ... Inclined plate 10 ... Spout 11 ... Sticking ring 12 ... Base ring 13 ... Screwing part 14 ... Dispensing cylinder 15 ... ··· Closed plate 16 ··································································· 18 Pull ring 19 ······································ 25 ··· Outer sealing ring 26 ··· Raised portion 27 ··· Cap screwed portion 141 ··· Discharged tube tip

Claims

液体用紙容器の口栓取り付け孔に突設されるスパウトと該スパウトに螺合させて装着するキャップとからなる口栓において、
前記スパウトが、下端外周面に貼着リングが周設された台座リングの上面の内周縁部にキャップとの螺合部を外周面に有する注出筒が立設され、該注出筒の下方内面には閉鎖板が設けられて内側が封止され、該閉鎖板の所定位置に環状切り込みが設けられて環状薄肉脆弱線が形成され、該環状薄肉脆弱線の内側近傍の上面の一側に、先端にプルリングを有する支柱が立設された構造からなり、
前記キャップが、天板の下面に前記スパウトの注出筒先端部近傍の内周面に外周面が密接するインナー封止リングが設けられ、キャップの周壁の内周面には、注出筒の外周面に設けられた螺合部と螺着可能なキャップ螺合部が形成された構造からなり、
前記インナー封止リングの外周面の先端部近傍は、外方に緩やかに突起した***部が周設された形状とすると共に、インナー封止リングに密接する注出筒部分の肉厚をインナー封止リングの肉厚に比較して同等又は薄くしたことを特徴とする口栓。 In a spout composed of a spout projecting from a spout attachment hole of a liquid paper container and a cap that is screwed into the spout and attached thereto,
The spout is provided with a pouring tube standing on the outer peripheral surface of the upper peripheral surface of the pedestal ring having a sticking ring on the outer peripheral surface of the lower end. A closing plate is provided on the inner surface and the inner side is sealed, and an annular cut is provided at a predetermined position of the closing plate to form an annular thin fragile line, on one side of the upper surface near the inner side of the annular thin fragile line , Consisting of a structure in which a pillar having a pull ring at the tip is erected,
The cap is provided with an inner sealing ring whose outer peripheral surface is in close contact with the inner peripheral surface near the tip of the spout tube of the spout on the lower surface of the top plate, and the inner peripheral surface of the peripheral wall of the cap has It has a structure in which a screwing portion provided on the outer peripheral surface and a cap screwing portion that can be screwed are formed,
The vicinity of the tip of the outer peripheral surface of the inner sealing ring has a shape in which a protruding portion that protrudes gently outward is provided around the inner sealing ring. A spigot characterized by being equal or thinner than the wall thickness of the retaining ring.

請求項１記載の口栓を熱融着により取り付けた液体用紙容器。 A liquid paper container to which the cap according to claim 1 is attached by heat fusion.