JP3925030B2

JP3925030B2 - Cap for liquid paper container

Info

Publication number: JP3925030B2
Application number: JP2000053700A
Authority: JP
Inventors: 土山　　武彦; 典一柿木; 晃孝岩崎
Original assignee: Toppan Inc
Current assignee: Toppan Inc
Priority date: 2000-02-29
Filing date: 2000-02-29
Publication date: 2007-06-06
Anticipated expiration: 2020-02-29
Also published as: JP2001240105A

Description

【０００１】
【発明の属する技術分野】
本発明は、容器頂部に超音波シール法で熱融着して突設されるスパウトとそのスパウトに螺着するキャップとからなる液体用紙容器の口栓に関するものである。
【０００２】
【従来の技術】
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、使用時の使い易さを考慮して、例えば、図７に示すように、胴部（２３）が四角柱状で、切り妻屋根形の頂部の傾斜板（２２）にスパウトとキャップとからなる口栓（１０）を突設する液体用紙容器（２０）が広く使用されている。この口栓は、容器の口栓取付孔から突出するスパウトの注出筒にキャップを螺着したものであるが、流通・保管時の密封性の完全さと使用時の易開封性を兼ね備えるため、例えば、図５又は図６に示すように、スパウト（１００）の注出筒（１２０）の内側の下方内面に封鎖板（１３０）を設けて封止し、使用時に開口するため、この封鎖板の下面の開口所定位置に断面逆Ｖ字状の環状切込み（１３１）を設けて環状薄肉脆弱部（１３２）を形成し、または、封鎖板の上面の開口所定位置に断面Ｖ字状の環状切込み（１３１）を設けて環状薄肉脆弱部（１３２）を形成し、この環状薄肉脆弱部の内側近傍の上面の一側に、先端にプルリング（１３４）をもつ支柱（１３３）を立設したものであり、容器を開封するために口栓を開口するときには、キャップ（２００）を取り外し、注出筒（１２０）の内側に収容されているプルリング（１３４）を指先に掛けて引っ張って、封鎖板（１３０）の環状薄肉脆弱部（１３２）を引き裂いて開口していた。なお、開口したスパウトは、キャップを螺着して再封止するものである。
【０００３】
【発明が解決しようとする課題】
しかしながら、上述の従来の液体用紙容器の口栓は、容器の口栓取付孔にスパウトの注出筒を突出させて、台座リングの下端外周面に周設する貼着リングの上面と容器の内面とを超音波シール法で熱融着するときに、発生する超音波の振動により、注出筒の内側に設けられた封鎖板の環状薄肉脆弱部にクラックを生じて密封性が損なわれることがあった。このため、超音波の周波数を上げてエネルギーを小さくし、ゆっくり熱融着しているが、生産能率が悪くコストの面で問題があった。
【０００４】
本発明は、上述の従来の問題を解決したものであり、口栓を容器に超音波シール法で熱融着するときに、小さい周波数の超音波を用いてエネルギーを上げて生産能率を向上しても、スパウトの封鎖板の環状薄肉脆弱部にクラックを発生しない液体用紙容器の口栓を提供するものである。
【０００５】
【課題を解決するための手段】
すなわち、本発明の第１の発明は、液体用紙容器の口栓取付孔に突設するスパウトとこのスパウトに螺合し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を周設する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もつ注出筒を立設し、この注出筒の下方内面に閉鎖板を設けて内側を封止し、この閉鎖板の所定位置に、環状切込みを設けて環状薄肉脆弱部を形成し、この環状薄肉脆弱部の内側近傍の上面の一側に、先端にプルリングをもつ支柱を立設し、かつ前記環状切込みより外側の閉鎖板の外周環状縁部に、前記環状切込みの外周から前記注出筒の内面に至る振動伝達防止凹部を周方向へ複数個等間隔に配設して部分的に薄肉としたことを特徴とする液体用紙容器の口栓である。
【０００６】
次に、本発明の第２の発明は、液体用紙容器の口栓取付孔に突設するスパウトとこのスパウトに螺合し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を周設する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もつ注出筒を立設し、この注出筒の下方内面に閉鎖板を設けて内側を封止し、この閉鎖板の下面の所定位置に、断面逆Ｖ字状の環状切込みを設けて上面に環状薄肉脆弱部を形成し、この環状薄肉脆弱部の内側近傍の上面の一側に、先端にプルリングをもつ支柱を立設し、かつ前記環状切込みより外側の閉鎖板の外周環状縁部の下面に、前記環状切込みの外周から前記注出筒の内面に至る振動伝達防止凹部を周方向へ複数個等間隔に配設して部分的に薄肉としたことを特徴とする液体用紙容器の口栓である。
【０００７】
次に、本発明の第３の発明は、液体用紙容器の口栓取付孔に突設するスパウトとこのスパウトに螺合し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を周設する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もつ注出筒を立設し、この注出筒の下方内面に閉鎖板を設けて内側を封止し、この閉鎖板の下面の所定位置に、断面逆Ｖ字状の環状切込みを設けて上面に環状薄肉脆弱部を形成し、この環状薄肉脆弱部の内側近傍の上面の一側に、先端にプルリングをもつ支柱を立設し、かつ前記環状切込みより外側の閉鎖板の外周環状縁部の下面に、前記環状切込みの外周から連続する所定幅の振動伝達防止凹部を周方向へ複数個等間隔に配設して部分的に薄肉としたことを特徴とする液体用紙容器の口栓。
【０００８】
次に、本発明の第４の発明は、液体用紙容器の口栓取付孔に突設するスパウトとこのスパウトに螺合し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を周設する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もつ注出筒を立設し、この注出筒の下方内面に閉鎖板を設けて内側を封止し、この閉鎖板の上面の所定位置に、断面Ｖ字状の環状切込みを設けて下面に環状薄肉脆弱部を形成し、この環状薄肉脆弱部の内側近傍の上面の一側に、先端にプルリングをもつ支柱を立設し、かつ前記環状切込みより外側の閉鎖板の外周環状縁部の上面に、前記環状切込みの外周から前記注出筒の内面に至る振動伝達防止凹部を周方向へ複数個等間隔に配設して部分的に薄肉としたことを特徴とする液体用紙容器の口栓である。
【０００９】
そして、本発明の第５の発明は、液体用紙容器の口栓取付孔に突設するスパウトとこのスパウトに螺合し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を周設する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もつ注出筒を立設し、この注出筒の下方内面に閉鎖板を設けて内側を封止し、この閉鎖板の上面の所定位置に、断面Ｖ字状の環状切込みを設けて下面に環状薄肉脆弱部を形成し、この環状薄肉脆弱部の内側近傍の上面の一側に、先端にプルリングをもつ支柱を立設し、かつ前記環状切込みより外側の閉鎖板の外周環状縁部の上面に、前記環状切込みの外周から連続する所定幅の振動伝達防止凹部を周方向へ複数個等間隔に配設して部分的に薄肉としたことを特徴とする液体用紙容器の口栓。
【００１０】
【発明の実施の形態】
本発明の液体用紙容器の口栓（１０）は、図１又は図３に示すように、液体用紙容器（２０）の口栓取付孔（２１）に内付けで突設するスパウト（１００）とこのスパウトに螺合して装着するキャップ（２００）とからなる口栓であり、スパウト（１００）の構造は、下端外周面に貼着リング（１１１）を周設する台座リング（１１０）の上面の内周縁部に、キャップとの螺合部（１２１）を外周面にもつ注出筒（１２０）を立設し、この注出筒の下方内面に閉鎖板（１３０）を設けて内側を封止し、この閉鎖板の所定位置に、断面逆Ｖ字状又は断面Ｖ字状の環状切込み（１３１）を設けて対向面側に環状薄肉脆弱部（１３２）を形成し、この環状薄肉脆弱部の内側近傍の上面の一側に、先端に通常では円形状又は楕円状のプルリング（１３４）をもつ支柱（１３３）を立設し、そして、図２又は図４に示すように、環状切込み（１３１）より外側の閉鎖板（１３０）の外周環状縁部に、環状切込みの外周から注出筒（１２０）の内面に至る振動伝達防止凹部（１３５）を周方向へ複数個等間隔に配設して部分的に薄肉とするものである。なお、振動伝達防止凹部を設けた閉鎖板の部分は、他の部分より通常ではほぼ半分程度の薄肉とするものである。また、環状薄肉脆弱部の形状は、円形、楕円形又は容器の使用目的に合わせた任意の形状がとれる。そして、キャップ（２００）の構造は、一般的なものでよく、天板（２１０）下面にコンタクト封止リング（２１１）やインナー封止リング（２１２）を垂設し、周壁（２２０）の内周面にスパウトとの螺合部（２２１）を設けるものである。また、口栓の容器への取り付けは、容器の口栓取付孔（２１）に、スパウトの注出筒及び台座リングを突出させ、台座リングの下端外周面に周設する貼着リング（１１１）の上面と容器（２０）の内面とを超音波シール法により熱融着して接着するものである。そして、スパウト及びキャップは、ポリエチレンやポリプロピレンなどの熱可塑性樹脂を用いて、射出成形法で作製されるものである。なお、スパウトは、貼着リング下面、台座リング下面及び封鎖板下面が同一水平面上にあり、スパウトの下面の環状薄肉脆弱部の外側からポリエチレン／メタキシレンジアミンナイロン／ポリエチレン構成、ポリエチレン／酸化ケイ素蒸着フィルム／ポリエチレン構成及びポリエチレン／アルミニウム箔／ポリエチレン構成などのバリア性フィルムをインサート射出成形法で貼り合わせた構造のものでもよい。
【００１１】
そして、本発明の液体用紙容器の口栓は、上述のように、環状切込みより外側の閉鎖板の外周環状縁部に、環状切込みの外周から注出筒の内面に至る振動伝達防止凹部を周方向へ複数個等間隔に配設して部分的に薄肉としているため、容器に口栓を超音波シール法で取り付けるときに、超音波で発生する振動が、スパウトの環状薄肉脆弱部に大きく伝わることが防げ、また、環状薄肉脆弱部で超音波による共鳴現象を起こすことが防げ、この結果、超音波に起因する環状薄肉脆弱部のクラックが防止できる。
【００１２】
次に、本発明の液体用紙容器の口栓のスパウトの実施の形態について、図を用いて詳細に説明する。
図１は、本発明の一実施形態の口栓を液体用紙容器の口栓取付孔に突設したときの要部を示す断面図であり、図２は、そのスパウトのＡ−Ａ’断面図である。また、図３は、本発明の他の一実施形態の口栓を液体用紙容器の口栓取付孔に突設したときの要部を示す断面図であり、図４は、そのスパウトのＢ−Ｂ’断面図である。
【００１３】
ー実施形態の口栓（１０）のスパウト（１００）の構造は、図１に示すように、下端外周面に貼着リング（１１１）を周設する台座リング（１１０）の上面の内周縁部に、外周面にキャップ（２００）との螺合部（１２１）をもつ注出筒（１２０）を立設し、この注出筒の下方内面に閉鎖板（１３０）を設けて内側を封止し、この閉鎖板の下面の所定位置に、断面逆Ｖ字状の環状切込み（１３１）を設けて上面に環状薄肉脆弱部（１３２）を形成し、この環状薄肉脆弱部の内側近傍の上面の一側に、先端にプルリング（１３４）をもつ支柱（１３３）を立設し、そして、図１及び図２に示すように、環状切込み（１３１）より外側の閉鎖板（１３０）の外周環状縁部の下面に、環状切込みの外周から注出筒（１２０）の内面に至る振動伝達防止凹部（１３５）を周方向へ通常では６個等間隔に配設して、その部分の閉鎖板の厚み（ｄ）を他の閉鎖板の厚み（Ｄ）より通常ではほぼ半分程度の薄肉とするものである。
【００１４】
また、他のー実施形態の口栓のスパウトの構造は、下端外周面に貼着リングを周設する台座リングの上面の内周縁部に、外周面にキャップとの螺合部をもつ注出筒を立設し、この注出筒の下方内面に閉鎖板を設けて内側を封止し、この閉鎖板の下面の所定位置に、断面逆Ｖ字状の環状切込みを設けて上面に環状薄肉脆弱部を形成し、この環状薄肉脆弱部の内側近傍の上面の一側に、先端にプルリングをもつ支柱を立設し、そして、環状切込みより外側の閉鎖板の外周環状縁部の下面に、環状切込みの外周から連続する所定幅の振動伝達防止凹部を周方向へ通常では６個等間隔に配設して、その部分の閉鎖板の厚みを他の閉鎖板の厚みより通常ではほぼ半分程度の薄肉とするものである。
【００１５】
また、他のー実施形態の口栓のスパウトの構造は、図３に示すように、下端外周面に貼着リング（１１１）を周設する台座リング（１１０）の上面の内周縁部に、キャップ（２００）との螺合部（１２１）を外周面にもつ注出筒（１２０）を立設し、この注出筒の下方内面に閉鎖板（１３０）を設けて内側を封止し、この閉鎖板の上面の所定位置に、断面Ｖ字状の環状切込み（１３１）を設けて下面に環状薄肉脆弱部（１３２）を形成し、この環状薄肉脆弱部の内側近傍の上面の一側に、先端にプルリング（１３４）をもつ支柱（１３３）を立設し、そして、図３及び図４に示すように、環状切込み（１３１）より外側の閉鎖板（１３０）の外周環状縁部の上面に、環状切込みの外周から注出筒（１２０）の内面に至る振動伝達防止凹部（１３５）を周方向へ通常では６個等間隔に配設して、その部分の閉鎖板の厚み（ｄ）を他の閉鎖板の厚み（Ｄ）より通常ではほぼ半分程度の薄肉とするものである。
【００１６】
また、他のー実施形態の口栓のスパウトの構造は、下端外周面に貼着リングを周設する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もつ注出筒を立設し、この注出筒の下方内面に閉鎖板を設けて内側を封止し、この閉鎖板の上面の所定位置に、断面Ｖ字状の環状切込みを設けて下面に環状薄肉脆弱部を形成し、この環状薄肉脆弱部の内側近傍の上面の一側に、先端にプルリングをもつ支柱を立設し、そして、環状切込みより外側の閉鎖板の外周環状縁部の上面に、環状切込みの外周から連続する所定幅の振動伝達防止凹部を周方向へ通常では６個等間隔に配設して、その部分の閉鎖板の厚みを他の閉鎖板の厚みより通常ではほぼ半分程度の薄肉とするものである。
【００１７】
そして、上述した４種類の実施形態の口栓を、充填ラインに装填し超音波シール機で容器の口栓取付孔に熱融着して取り付けたが、エネルギーの大きい１８ｋＨｚという小さな周波数の超音波を使用しても、スパウトの環状薄肉脆弱部にクラックを生じるこたがなく、充填ラインのスピードを上げることができ、生産効率が良好であった。なお、ウェルドタイムは、０．３３秒である。
【００１８】
なお、発明者らのテストにおいては、６個の振動伝達防止凹部を振動伝達防止凹部（この部分の閉鎖板は薄肉となる）の周方向の幅と振動伝達防止凹部間（この部分の閉鎖板は厚肉となる）の周方向の間隔を同一にするようにして配設したときが最も結果が良好であったが、振動伝達防止凹部の個数が４個の場合や８個の場合でも効果があった。また、振動伝達防止凹部間の周方向の間隔を振動伝達防止凹部の周方向の幅より狭く３分の２にした場合でも効果があった。また、プルリング付支柱の前に振動伝達防止凹部を設けても、振動伝達防止凹部をプルリング付支柱の前に設けなくても、同様の効果があった。また、環状切込みの平面方向の形状が円形でも、円形でなくても、同様の効果があった。
【００１９】
【発明の効果】
本発明の液体用紙容器の口栓は、環状切込みより外側の閉鎖板の外周環状縁部に、環状切込みの外周から注出筒の内面に至る振動伝達防止凹部を周方向へ複数個等間隔に配設して部分的に薄肉としており、口栓を容器に超音波シール法により熱融着するときに、超音波の振動が環状薄肉脆弱部に伝わりにくく、環状薄肉脆弱部にクラックを生じない。
【００２０】
このため、エネルギーの高い小さい周波数の超音波を用いても、環状薄肉脆弱部にクラックを生じる危惧が極めて少ないため、充填ラインのスピードを上げることができ、生産能率の向上が計れる。
【図面の簡単な説明】
【図１】本発明の一実施形態の口栓を液体用紙容器の口栓取付孔に突設したときの要部を示す断面図である。
【図２】図１のスパウトのＡ−Ａ’断面図である。
【図３】本発明の他の一実施形態の口栓を液体用紙容器の口栓取付孔に突設したときの要部を示す断面図である。
【図４】図３のスパウトのＢ−Ｂ’断面図である。
【図５】液体用紙容器の口栓取付孔に突設したときの従来の一例の口栓の要部を示す断面図である。
【図６】液体用紙容器の口栓取付孔に突設したときの従来の他の一例の口栓の要部を示す断面図である。
【図７】口栓を頂部傾斜板に突設した一例の液体用紙容器の斜視図である。
【符号の説明】
１０……口栓
２０……容器
２１……口栓取付孔
２２……傾斜板
２３……胴部
１００……スパウト
１１０……台座リング
１１１……貼着リング
１２０……注出筒
１２１，２２１……螺合部
１３０……閉鎖板
１３１……環状切込み
１３２……環状薄肉脆弱部
１３３……支柱
１３４……プルリング
１３５……振動伝達防止凹部
２００……キャップ
２１０……天板
２１１……コンタクト封止リング
２１２……インナー封止リング
２２０……周壁[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stopper for a liquid paper container comprising a spout that is heat-sealed to the top of the container by an ultrasonic sealing method and a cap that is screwed to the spout.
[0002]
[Prior art]
Conventionally, in the liquid paper container used for the liquid contents of food and non-food, considering the ease of use at the time of use, for example, as shown in FIG. A liquid paper container (20) is widely used in which a stopper (10) made of a spout and a cap protrudes from an inclined plate (22) at the top of a gable roof shape. This cap is a cap that is screwed into a spout pipe that protrudes from the cap mounting hole of the container, but since it combines perfect sealing during distribution and storage with easy opening during use, For example, as shown in FIG. 5 or FIG. 6, a sealing plate (130) is provided on the lower inner surface of the spout (100) inside the spout tube (120), and the sealing plate is opened during use. An annular notch (131) having an inverted V-shaped cross section is provided at a predetermined position on the lower surface of the opening to form an annular thin fragile portion (132), or an annular notch having a V-shaped cross section at a predetermined position on the upper surface of the sealing plate. (131) is provided to form an annular thin fragile portion (132), and a column (133) having a pull ring (134) at the tip is erected on one side of the upper surface near the inside of the annular thin fragile portion. Yes, when opening the spigot to open the container , Remove the cap (200), the pouring cylinder and is housed inside (120) in which the pull ring (134) to pull over to the fingertips, opening tore thin annular fragile portion (132) of the blocked plates (130) Was. In addition, the spout which opened is screwed and re-sealed with a cap.
[0003]
[Problems to be solved by the invention]
However, the above-mentioned conventional liquid paper container cap has an upper surface of the sticking ring and an inner surface of the container that are provided around the lower end outer peripheral surface of the pedestal ring by projecting the spout pipe of the spout into the cap mounting hole of the container. When heat sealing with the ultrasonic sealing method, the vibration of the generated ultrasonic waves may cause a crack in the annular thin fragile portion of the sealing plate provided inside the dispensing cylinder and impair the sealing performance. there were. For this reason, energy is reduced by increasing the frequency of ultrasonic waves, and heat fusion is slowly performed, but there is a problem in terms of cost due to poor production efficiency.
[0004]
The present invention solves the above-described conventional problems, and when heat-sealing a spigot to a container by an ultrasonic sealing method, the energy is increased using ultrasonic waves of a small frequency to improve the production efficiency. However, it is an object of the present invention to provide a stopper for a liquid paper container that does not generate cracks in the thin thin fragile portion of the spout sealing plate.
[0005]
[Means for Solving the Problems]
In other words, according to a first aspect of the present invention, there is provided a spigot comprising a spout projecting from a spigot attachment hole of a liquid paper container and a cap screwed onto the spout, and the spout is disposed on the outer peripheral surface of the lower end. A pour cylinder with a threaded part with the cap on the outer peripheral surface is erected on the inner peripheral edge of the upper surface of the pedestal ring that surrounds the sticking ring. An annular cut is formed at a predetermined position of the closing plate to form an annular thin fragile portion, and a column having a pull ring at the tip is erected on one side of the upper surface near the inside of the annular thin fragile portion. And a plurality of vibration transmission preventing recesses extending from the outer periphery of the annular notch to the inner surface of the dispensing cylinder at equal intervals in the circumferential direction on the outer peripheral annular edge of the closing plate outside the annular notch It is a stopper of a liquid paper container characterized by having a thin wall .
[0006]
Next, according to a second aspect of the present invention, there is provided a spigot comprising a spout projecting from a spigot attachment hole of a liquid paper container and a cap screwed onto the spout, and the spout is provided at a lower end outer peripheral surface. A pour cylinder with a screwed portion with the cap on the outer peripheral surface is erected on the inner peripheral edge of the upper surface of the pedestal ring that surrounds the sticking ring, and a closing plate is provided on the lower inner surface of this pour cylinder The inner side is sealed, and an annular cut having an inverted V-shaped cross section is provided at a predetermined position on the lower surface of the closing plate to form an annular thin fragile portion on the upper surface. One side of the upper surface near the inner side of the annular thin fragile portion Further, a vibration transmission preventing recess extending from the outer periphery of the annular notch to the inner surface of the dispensing cylinder is provided on the lower surface of the outer peripheral annular edge of the closing plate outside the annular notch. be characterized in that a circumferential direction into a plurality at equal intervals on and disposed partially thin A spout for liquid cartons.
[0007]
Next, according to a third aspect of the present invention, there is provided a spigot comprising a spout projecting from a spigot mounting hole of a liquid paper container and a cap screwed onto the spout, wherein the spout has a lower end outer peripheral surface. A pour cylinder with a screwed portion with the cap on the outer peripheral surface is erected on the inner peripheral edge of the upper surface of the pedestal ring that surrounds the sticking ring, and a closing plate is provided on the lower inner surface of this pour cylinder The inner side is sealed, and an annular cut having an inverted V-shaped cross section is provided at a predetermined position on the lower surface of the closing plate to form an annular thin fragile portion on the upper surface. One side of the upper surface near the inner side of the annular thin fragile portion In addition, a column having a pull ring at the tip is erected and a vibration transmission preventing recess having a predetermined width continuous from the outer periphery of the annular cut is provided in the circumferential direction on the lower surface of the outer peripheral annular edge of the closing plate outside the annular cut. liquid which is characterized in that the disposed to partially thin the plurality at equal intervals Mouth of the paper container.
[0008]
Next, a fourth invention of the present invention is a plug comprising a spout projecting from a plug mounting hole of a liquid paper container and a cap screwed onto the spout, and the spout has a lower end outer peripheral surface. A pour cylinder with a screwed portion with the cap on the outer peripheral surface is erected on the inner peripheral edge of the upper surface of the pedestal ring that surrounds the sticking ring, and a closing plate is provided on the lower inner surface of this pour cylinder The inner side is sealed, and an annular cut having a V-shaped cross section is provided at a predetermined position on the upper surface of the closing plate to form an annular thin fragile portion on the lower surface, and on one side of the upper surface near the inner side of the annular thin fragile portion. A vibration transmission preventing recess extending from the outer periphery of the annular notch to the inner surface of the dispensing cylinder is provided on the upper surface of the outer peripheral annular edge of the closing plate outside the annular notch. and characterized in that a partially thinner by arranging a plurality at equal intervals in the direction Is the mouth of the body paper container.
[0009]
According to a fifth aspect of the present invention, there is provided a spigot comprising a spout projecting from a spigot mounting hole of a liquid paper container and a cap screwed onto the spout, and the spout is formed on the outer peripheral surface of the lower end. A pour cylinder with a threaded part with the cap on the outer peripheral surface is erected on the inner peripheral edge of the upper surface of the pedestal ring that surrounds the sticking ring. In a predetermined position on the upper surface of the closing plate, an annular cut having a V-shaped cross section is provided to form an annular thin fragile portion on the lower surface, on one side of the upper surface near the inside of the annular thin fragile portion, A pillar having a pull ring at the tip is erected, and a plurality of vibration transmission preventing recesses having a predetermined width continuous from the outer periphery of the annular notch are provided on the upper surface of the outer peripheral annular edge of the closing plate outside the annular notch in the circumferential direction. liquid which is characterized in that the disposed to partially thin equidistantly Mouth of the paper container.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1 or FIG. 3, the spout (100) of the liquid paper container of the present invention has a spout (100) projecting internally from the cap attachment hole (21) of the liquid paper container (20). The spout (100) has a cap (200) that is screwed onto and attached to the spout. The spout (100) has an upper surface of a pedestal ring (110) in which a sticking ring (111) is provided on the outer peripheral surface of the lower end. A pour tube (120) having an outer peripheral surface with a threaded portion (121) with a cap is erected on the inner peripheral edge, and a closing plate (130) is provided on the lower inner surface of the pour tube to seal the inside. An annular notch (131) having an inverted V-shaped cross section or a V-shaped cross section is provided at a predetermined position of the closing plate to form an annular thin fragile portion (132) on the opposite surface side. On one side of the top surface in the vicinity of the inside of the pull ring (13 ) Erected posts (133) with, and as shown in FIG. 2 or FIG. 4, the outer peripheral annular edge portion of the outside of the closure plate from the annular notch (131) (130) Note from the outer periphery of the annular notch A plurality of vibration transmission preventing recesses (135) reaching the inner surface of the outlet tube (120) are arranged at equal intervals in the circumferential direction, and are partially thinned . Note that the portion of the closing plate provided with the vibration transmission preventing concave portion is generally about half as thin as the other portions. In addition, the shape of the annular thin fragile portion can be a circle, an ellipse, or any shape according to the intended use of the container. The cap (200) may have a general structure. A contact sealing ring (211) or an inner sealing ring (212) is suspended from the lower surface of the top plate (210), and the inner wall of the peripheral wall (220). A screw part (221) with a spout is provided on the peripheral surface. The stopper is attached to the container by attaching a spout pipe and a pedestal ring to the stopper mounting hole (21) of the container, and a sticking ring (111) provided around the lower end outer peripheral surface of the pedestal ring. And the inner surface of the container (20) are heat-sealed and bonded together by an ultrasonic sealing method. The spout and the cap are produced by an injection molding method using a thermoplastic resin such as polyethylene or polypropylene. Note that the spout is bonded ring bottom surface, the pedestal ring bottom and blocked plates lower surface are on the same horizontal plane, polyethylene / metaxylene diamine nylon / polyethylene structure from the outside of the thin annular weak portions of the lower surface of the spout, polyethylene / silicon oxide vapor deposition It may have a structure in which barrier films such as a film / polyethylene structure and a polyethylene / aluminum foil / polyethylene structure are bonded together by an insert injection molding method.
[0011]
In addition, as described above, the stopper of the liquid paper container of the present invention has a vibration transmission preventing recess extending from the outer periphery of the annular notch to the inner surface of the dispensing cylinder at the outer peripheral annular edge of the closing plate outside the annular notch. Since a plurality of parts are arranged at equal intervals in the direction to make them partially thin, vibration generated by ultrasonic waves is greatly transmitted to the annular thin fragile part of the spout when attaching the stopper to the container by the ultrasonic sealing method. In addition, it is possible to prevent the resonance phenomenon due to the ultrasonic waves in the thin annular fragile portion, and as a result, it is possible to prevent cracks in the annular thin fragile portion due to the ultrasonic waves.
[0012]
Next, an embodiment of the spout of the stopper of the liquid paper container of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view showing a main part when a spigot according to an embodiment of the present invention is protruded from a spigot attachment hole of a liquid paper container, and FIG. 2 is a cross-sectional view of the spout along the line AA ′. It is. FIG. 3 is a cross-sectional view showing the main part when the stopper of another embodiment of the present invention is projected from the stopper mounting hole of the liquid paper container, and FIG. 4 is a B- It is B 'sectional drawing.
[0013]
-The structure of the spout (100) of the spigot (10) of the embodiment, as shown in FIG. 1, is the inner peripheral edge of the upper surface of the pedestal ring (110) that surrounds the sticking ring (111) on the outer peripheral surface of the lower end. In addition, a pour tube (120) having a threaded part (121) with the cap (200) on the outer peripheral surface is erected, and a closing plate (130) is provided on the lower inner surface of the pour tube to seal the inside. An annular notch (131) having an inverted V-shaped cross section is provided at a predetermined position on the lower surface of the closing plate to form an annular thin fragile portion (132) on the upper surface, and an upper surface near the inside of the annular thin fragile portion is formed. A column (133) having a pull ring (134) at its tip is erected on one side, and as shown in FIGS. 1 and 2, the outer peripheral edge of the closing plate (130) outside the annular cut (131) the lower surface of the part, the vibration transmission proof leading to the inner surface of the pouring cylinder from the outer periphery of the annular notch (120) A recess (135) in the normal to the circumferential direction and arranged in six equal intervals, usually approximately half of the thin-walled in from the closure plate having a thickness (d) the other closing plate thickness of the portion (D) Is.
[0014]
In addition, the spout structure of the spigot of the other embodiment is a pour-out having a screwed portion with a cap on the outer peripheral surface on the inner peripheral portion of the upper surface of the base ring that surrounds the sticking ring on the outer peripheral surface of the lower end. A cylinder is erected, a closing plate is provided on the lower inner surface of the dispensing cylinder, the inside is sealed, and an annular cut having an inverted V-shaped cross section is provided at a predetermined position on the lower surface of the closing plate, and an annular thin wall is formed on the upper surface. A fragile part is formed, a column having a pull ring at the tip is erected on one side of the upper surface near the inside of the annular thin fragile part, and on the lower surface of the outer peripheral annular edge of the closing plate outside the annular notch, Normally, six vibration transmission preventing recesses having a predetermined width continuous from the outer periphery of the annular notch are arranged in the circumferential direction at regular intervals, and the thickness of the closing plate at that portion is usually about half of the thickness of the other closing plates. It is intended to be thin.
[0015]
In addition, as shown in FIG. 3, the spout structure of the spigot of the other embodiment is formed on the inner peripheral edge of the upper surface of the base ring (110) that surrounds the sticking ring (111) on the outer peripheral surface of the lower end. A pouring tube (120) having a threaded portion (121) with the cap (200) on the outer peripheral surface is erected, and a closing plate (130) is provided on the lower inner surface of the pouring tube to seal the inside, An annular notch (131) having a V-shaped cross section is provided at a predetermined position on the upper surface of the closing plate to form an annular thin fragile portion (132) on the lower surface, on one side of the upper surface near the inside of the annular thin fragile portion. A column (133) having a pull ring (134) at the tip is erected, and as shown in FIGS. 3 and 4, the upper surface of the outer peripheral annular edge of the closing plate (130) outside the annular notch (131) , the vibration transmission prevention recess leading to the inner surface of the pouring cylinder from the outer periphery of the annular notch (120) (1 5) in the normal to the circumferential direction and arranged in six equally spaced, one that normally approximately half of the thin-walled in from the closure plate having a thickness (d) the other closing plate thickness of the portion (D) is there.
[0016]
In addition, the spout structure of the spigot of the other embodiment is a pour-out having an outer peripheral surface on the inner peripheral edge of the upper surface of the pedestal ring that surrounds the sticking ring on the outer peripheral surface of the lower end. A cylinder is erected, a closing plate is provided on the lower inner surface of the pouring cylinder, the inside is sealed, and an annular cut having a V-shaped cross section is provided at a predetermined position on the upper surface of the closing plate, and an annular thin wall weakness is formed on the lower surface. part is formed on one side of the upper surface of the inner vicinity of the thin annular weak portions, erected posts with pull ring on the tip, and, on the upper surface of the outer annular edge of the closure plate of the outside of the annular notch, cyclic Normally, six vibration transmission preventing recesses of a predetermined width continuous from the outer periphery of the notch are arranged at regular intervals in the circumferential direction, and the thickness of the closing plate of that portion is usually about half of the thickness of the other closing plates. It should be thin.
[0017]
Then, the plugs of the above-described four types of embodiments were loaded into the filling line and heat-sealed and attached to the plug attachment holes of the container with an ultrasonic sealing machine. Even when used, there was no occurrence of cracks in the thin thin fragile portion of the spout, the speed of the filling line could be increased, and the production efficiency was good. The weld time is 0.33 seconds.
[0018]
In the tests of the inventors, the six vibration transmission preventing recesses are divided into the width in the circumferential direction of the vibration transmission preventing recesses (the closing plate of this part is thin) and the vibration transmission preventing recesses (the closing plate of this part). The result was the best when they were arranged with the same spacing in the circumferential direction, but it was also effective when the number of recesses for preventing vibration transmission was 4 or 8. was there. In addition, there was an effect even when the circumferential interval between the vibration transmission preventing recesses was narrower than the circumferential width of the vibration transmission preventing recess and was two thirds. Further, even if the vibration transmission preventing concave portion is provided in front of the column with pull ring or the vibration transmission preventing concave portion is not provided in front of the column with pull ring, the same effect is obtained. Further, the same effect was obtained regardless of whether the shape of the annular cut in the planar direction was circular or not circular.
[0019]
【The invention's effect】
The stopper of the liquid paper container of the present invention is provided with a plurality of vibration transmission preventing recesses from the outer periphery of the annular cut to the inner surface of the dispensing cylinder at equal intervals in the circumferential direction at the outer peripheral annular edge of the closing plate outside the annular cut. Disposed and partially thinned, when the spigot is heat-sealed to the container by the ultrasonic sealing method, ultrasonic vibrations are not easily transmitted to the annular thin fragile portion, and no crack is generated in the annular thin fragile portion .
[0020]
For this reason, even if ultrasonic waves having a high energy and a low frequency are used, there is very little risk of cracks in the annular thin fragile portion , so the speed of the filling line can be increased and the production efficiency can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a main part when a spigot according to an embodiment of the present invention is projected from a spigot attachment hole of a liquid paper container.
FIG. 2 is a cross-sectional view of the spout of FIG. 1 along AA ′.
FIG. 3 is a cross-sectional view showing a main part when a stopper according to another embodiment of the present invention projects from a stopper mounting hole of a liquid paper container.
4 is a sectional view of the spout of FIG. 3 taken along the line BB ′. FIG.
FIG. 5 is a cross-sectional view showing a main part of a conventional example of a cap when protruding from a cap mounting hole of a liquid paper container.
FIG. 6 is a cross-sectional view showing a main part of another conventional example of a cap when protruding from a cap mounting hole of a liquid paper container.
FIG. 7 is a perspective view of an example of a liquid paper container having a stopper plug protruding from a top inclined plate.
[Explanation of symbols]
10 …… 20 spout 20 …… container 21 ...... spigot mounting hole 22 ...... inclined plate 23 ...... body 100 …… spout 110 …… pedestal ring 111 …… sticking ring 120 …… dispensing pipe 121, 221 ...... Screw portion 130 ...... Close plate 131 ...... Round notch 132 …… Annular thin fragile portion 133 …… Post 134 …… Pull ring 135 …… Vibration transmission preventing recess 200 …… Cap 210 …… Top plate 211 …… Contact Sealing ring 212 ... Inner sealing ring 220 ... Peripheral wall

Claims

An upper surface of a pedestal ring in which a spout projecting from a spout mounting hole of a liquid paper container and a cap that is screwed onto the spout and attached to the spout is provided on the pedestal ring that surrounds a sticking ring on the outer peripheral surface of the lower end. A pour tube having a threaded portion with a cap on the outer peripheral surface is erected on the inner peripheral edge, and a closing plate is provided on the lower inner surface of the pour tube to seal the inside, and a predetermined position of the closing plate An annular cut is provided to form an annular thin fragile portion, a support column having a pull ring at the tip is erected on one side of the upper surface near the inside of the annular thin fragile portion, and a closing plate outside the annular cut The liquid is characterized in that a plurality of vibration transmission preventing recesses extending from the outer periphery of the annular notch to the inner surface of the dispensing cylinder are arranged at equal intervals in the circumferential direction on the outer peripheral annular edge of the outer peripheral annular portion. Paper container plug.

An upper surface of a pedestal ring in which a spout projecting from a spout mounting hole of a liquid paper container and a cap that is screwed onto the spout and attached to the spout is provided on the pedestal ring that surrounds a sticking ring on the outer peripheral surface of the lower end. A pouring tube having a threaded portion with a cap on the outer peripheral surface is erected on the inner peripheral edge of the inner surface, and a closing plate is provided on the lower inner surface of the pouring tube to seal the inner side. in position, the thin annular brittle portion formed on the upper surface provided with a cross-sectional inverted V-shaped annular notch on one side of the upper surface of the inner vicinity of the annular thin fragile portion, erected posts with pull ring to tip And a plurality of vibration transmission preventing recesses from the outer periphery of the annular notch to the inner surface of the dispensing cylinder are arranged at equal intervals in the circumferential direction on the lower surface of the outer peripheral annular edge of the closing plate outside the annular notch. A stopper for a liquid paper container characterized by being partially thin .

An upper surface of a pedestal ring in which a spout projecting from a spout mounting hole of a liquid paper container and a cap that is screwed onto the spout and attached to the spout is provided on the pedestal ring that surrounds a sticking ring on the outer peripheral surface of the lower end. A pouring tube having a threaded portion with a cap on the outer peripheral surface is erected on the inner peripheral edge of the inner surface, and a closing plate is provided on the lower inner surface of the pouring tube to seal the inner side. An annular cut with an inverted V-shaped cross section is provided at a predetermined position to form an annular thin fragile portion on the upper surface, and a column having a pull ring at the tip is erected on one side of the upper surface near the inner side of the annular thin fragile portion. In addition, a plurality of vibration transmission preventing recesses having a predetermined width continuous from the outer periphery of the annular notch are disposed at equal intervals in the circumferential direction on the lower surface of the outer peripheral annular edge of the closing plate outside the annular notch. A stopper for a liquid paper container characterized by being thin .

An upper surface of a pedestal ring in which a spout projecting from a spout mounting hole of a liquid paper container and a cap that is screwed onto the spout and attached to the spout is provided on the pedestal ring that surrounds a sticking ring on the outer peripheral surface of the lower end. A pour tube having a threaded portion with a cap on the outer peripheral surface is erected on the inner peripheral edge, and a closure plate is provided on the lower inner surface of the pour tube to seal the inner side. At a predetermined position, an annular cut having a V-shaped cross section is provided to form an annular thin fragile portion on the lower surface, and a column having a pull ring at the tip is erected on one side of the upper surface near the inner side of the annular thin fragile portion, And a plurality of vibration transmission preventing recesses extending from the outer periphery of the annular notch to the inner surface of the dispensing cylinder at equal intervals in the circumferential direction on the upper surface of the outer peripheral annular edge of the closing plate outside the annular notch A stopper for a liquid paper container characterized by being thin .

An upper surface of a pedestal ring in which a spout projecting from a spout mounting hole of a liquid paper container and a cap that is screwed onto the spout and attached to the spout is provided on the pedestal ring that surrounds a sticking ring on the outer peripheral surface of the lower end. A pour tube having a threaded portion with a cap on the outer peripheral surface is erected on the inner peripheral edge, and a closure plate is provided on the lower inner surface of the pour tube to seal the inner side. At a predetermined position, an annular cut having a V-shaped cross section is provided to form an annular thin fragile portion on the lower surface, and a column having a pull ring at the tip is erected on one side of the upper surface near the inner side of the annular thin fragile portion, In addition, a plurality of vibration transmission preventing recesses having a predetermined width continuous from the outer periphery of the annular notch are arranged at equal intervals in the circumferential direction on the upper surface of the outer peripheral annular edge of the closing plate outside the annular notch. A cap for a liquid paper container characterized by the above.