JP2004067101A

JP2004067101A - Cap with pull-ring

Info

Publication number: JP2004067101A
Application number: JP2002224507A
Authority: JP
Inventors: Kiyoshi Wada; 和田　潔; Tadasuke Kojima; 小嶋　忠祐; Shinji Kaneyuki; 金行　伸二; Masao Kobayashi; 小林　正男
Original assignee: Toppan Printing Co Ltd
Current assignee: Toppan Inc
Priority date: 2002-08-01
Filing date: 2002-08-01
Publication date: 2004-03-04

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plug with a pull-ring which is resistant to the occurrence of a crack on a thin annular weakened line on a spout sealing plate when the plug is to be welded with a plug attaching hole of a container by means of ultrasonic sealing. <P>SOLUTION: The plug 10 with a pull-ring comprises a spout 100 and a cap 200. The spout has a pour-out tube 120 standing at the inner peripheral rim on the upper surface of a base ring 110 equipped with a flange 140 on the lower end outer peripheral surface. The lower part inside the pour-out tube is sealed by providing the sealing plate 130. The thin annular weakened line 132 is formed at a position expected to open of the sealing plate. A strut 133 for connecting the pull-ring 134 at the tip is made to stand on one of sides of the upper surface in the vicinity of the weakened line. Thus the plug is protrusively provided inside the plug attaching hole 23 of the container by means of ultrasonic sealing. An annular grooved part 111 is formed on the lower surface of the base ring of the spout. In addition, the thickness e outside the thin annular weakened line of the sealing plate on the lower part inside the pour-out tube of the spout is specified to be thinner than the thickness E of the sealing plate inside the weakened line. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、液体用紙容器や軟質包装材容器の注出位置に、超音波シール法により内付けで突設するスパウトと、そのスパウトに装着するキャップとからなり、プルリングで薄肉脆弱線を破断してスパウトを開口するプルリング付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例えば液体用紙容器には、使用時の使い易さを考慮して、図２に示すように、胴部（２１）が四角筒状で、切り妻屋根形の頂部の傾斜板（２２）にスパウト（１００）とキャップ（２００）とからなる口栓（１０）を突設した液体用紙容器（２０）が、広い用途範囲にわたって使用されていた。この口栓は、例えば図３に示すように、容器（２０）の口栓取付孔（２３）から突出するスパウト（１００）の注出筒（１２０）にキャップ（２００）を螺着したものであるが、流通時の密封性の完全さやバージン性の確保または使用時の易開封性を兼ね備えるために、スパウトの注出筒（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所定位置に垂直断面逆Ｖ字状の環状切込み（１３１）を設けて、上面の開口予定位置に環状薄肉脆弱線（１３２）を形成し、この環状薄肉脆弱線の内側近傍の上面の所定の一側に、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、スパウト（１００）の注出筒（１２０）の内側に収容されているプルリング（１３４）に指先を掛けて上方へ引っ張って、封鎖板（１３０）の環状薄肉脆弱線（１３２）を引き裂いて開口していた。なお、開口したスパウトは、使用したのちに、キャップを注出筒に螺合して装着して再封止していた。
【０００３】
【発明が解決しようとする課題】
しかしながら、上述の従来のプルリング付口栓（１０）は、図３に示すように、容器（２０）（２点鎖線で図示）の口栓取付孔（２３）にスパウト（１００）の注出筒（１２０）を突出させて、台座リング（１１０）の下端外周面に設けたフランジ（１４０）の上面と容器の内面とを超音波シール法で溶着するときに（内付け）、ホーン（３０）（３点鎖線で図示）から発生する超音波の振動エネルギーによって、注出筒の内側に設けられた封鎖板（１３０）の環状薄肉脆弱線（１３２）にクラック（亀裂）を生じて密封性が損なわれることがあった。
【０００４】
本発明は、上述の従来のプルリング付口栓の問題を解決したものであり、口栓を容器の口栓取付孔に超音波シール法で内付けで溶着するときに、スパウトの封鎖板の環状薄肉脆弱線にクラックが発生しにくいプルリング付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、スパウトとこのスパウトに装着するキャップとからなり、前記スパウトが、下端外周面にフランジを設けた台座リングの上面内周縁部に注出筒を立設し、この注出筒の内側下方を封鎖板を設けて封止し、この封鎖板の開口予定位置に環状薄肉脆弱線を形成し、この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接続する支柱を立設し、超音波シール法で容器の口栓取付孔に内付けで突設するプルリング付口栓において、前記スパウトの台座リングの下面に環状透かし部を形成し、かつ、前記スパウトの注出筒の内側下方に設ける封鎖板の環状薄肉脆弱線より外側の厚みを、環状薄肉脆弱線より内側の封鎖板の厚みより薄くしたことを特徴とするプルリング付キャップである。
【０００６】
そして、本発明の第２の発明は、前記スパウトの台座リングの下面に設ける環状透かし部の高さが、前記スパウトの台座リングの下端外周面に設けるフランジの厚みの２分の１より高く、かつ、前記封鎖板の環状薄肉脆弱線より外側の厚みを、環状薄肉脆弱線より内側の封鎖板の厚みのほぼ２分の１にしたことを特徴とする第１の発明に記載のプルリング付キャップである。
【０００７】
【発明の実施の形態】
本発明の一実施形態のプルリング付キャップ（１０）は、図１に示すように、液体用紙容器や軟質包装材容器の口栓取付孔（２３）に内付けで超音波シール法で突設するスパウト（１００）とこのスパウトに螺着するキャップ（２００）とからなる。スパウトは、下端外周面にフランジ（１４０）を設けた台座リング（１１０）の上面内周縁部に注出筒（１２０）を立設し、この注出筒の内側下方を封鎖板（１３０）を設けて封止し、この封鎖板の開口予定位置に環状薄肉脆弱線（１３２）を形成し、この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（１３４）を接続する支柱（１３３）を立設し、台座リングの下面の左右方向のほぼ中央の位置に環状透かし部（１１１）を形成し、また、注出筒の内側下方に設ける封鎖板の環状薄肉脆弱線より外側の厚み（ｅ）を、環状薄肉脆弱線より内側の封鎖板の厚み（Ｅ）より薄く、注出筒の外周面にはキャップとの雄ネジ（１２１）を設けるものである。上述の環状透かし部の高さは、フランジの厚みの２分の１より高くし、また、封鎖板の環状薄肉脆弱線より外側の厚みは、環状薄肉脆弱線より内側の封鎖板の厚みのほぼ２分の１にするものである。なお、キャップは、天板下面にスパウトの注出筒の上端部を封止する封止リングを設け、周壁内周面にはスパウトとの雌ネジを設けるものである。そして、スパウトは、環状薄肉脆弱線をプルリングを引っ張ったときに破断し易くするために、通常では、低密度ポリエチレンを用いて射出成形法により作製し、また、キャップは、ポリプロピレンや高密度ポリエチレンなどを用いて射出成形法により作製するものである。また、容器へのスパウトの取り付けは、容器（２０）（２点鎖線で図示）の口栓取付孔（２３）にスパウト（１００）の注出筒（１２０）を突出させて、台座リング（１１０）の下端外周面に設けたフランジ（１４０）の上面と容器の内面とを、超音波シール機のホーン（３０）（３点鎖線で図示）から発生する超音波の振動エネルギーによって溶着するものである。
【０００８】
本発明の口栓は、超音波シール法で容器の口栓取付孔に内付けで突設けするときに、ホーンから発生する超音波の振動エネルギーが台座リングより内側にも伝わるが、台座リングの下面の左右方向のほぼ中央の位置に環状透かし部が設けられているため、振動エネルギーが台座リングを伝わるときに、振動エネルギーが環状透かし部により吸収されて減衰し、さらに、封鎖板の環状薄肉脆弱線より外側の厚みを環状薄肉脆弱線より内側の封鎖板の厚みより薄いため、封鎖板の環状薄肉脆弱線へ振動エネルギーが伝わりにくくなり、ホーンから発生する超音波の振動エネルギーの封鎖板の環状薄肉脆弱線への影響が極めて少なくなる。この結果、ホーンから発生する超音波の振動エネルギーにより封鎖板の環状薄肉脆弱線が破断することが防げる。
【０００９】
＜実施例１＞
まず、スパウト（１００）を低密度ポリエチレンを用いて射出成形法により作製した。その構造は、図１に示すように、下端外周面にフランジ（１４０）を設けた台座リング（１１０）の上面内周縁部に注出筒（１２０）を立設し、この注出筒の内側下方を封鎖板（１３０）を設けて封止し、この封鎖板の開口予定位置の下面より断面三角形状の環切込み（１３１）を設けて上面に環状薄肉脆弱線（１３２）を形成し、この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（１３４）を接続する支柱（１３３）を立設し、台座リングの下面の左右方向のほぼ中央の位置に、スパウトのフランジの厚みと同じ高さで断面長方形状の環透かし部（１１１）を形成し、また、注出筒の内側下方に設ける封鎖板の環状薄肉脆弱線より外側の厚み（ｅ）を、環状薄肉脆弱線より内側の封鎖板の厚み（Ｅ）の２分１にし、注出筒の外周面にはキャップとの雄ネジ（１２１）を設けた。次に、キャップ（２００）をポリプロピレンを用いて射出成形法により作製した。その構造は、図１に示すように、天板（２１０）下面にスパウトの注出筒の上端部を封止するインナー封止リング（２１１）（外周面を注出筒の上端部内周面に密接）とそのインナー封止リングの外側へ隣接させてコンタクト封止リング（２１２）（下方先端を注出筒の上面に密接）を設け、周壁内周面にはスパウトとの雌ネジ（２２１）を設けた。
【００１０】
＜比較例１＞
スパウトの台座リングの下面に環状透かし部を設けず、また、注出筒の内側下方に設ける封鎖板の環状薄肉脆弱線より外側の厚みを、環状薄肉脆弱線より内側の封鎖板の厚みと同じにした以外は実施例１と同様である。
【００１１】
＜比較例２＞
スパウトの注出筒の内側下方に設ける封鎖板の環状薄肉脆弱線より外側の厚みを、環状薄肉脆弱線より内側の封鎖板の厚みと同じにした以外は実施例１と同様である。
【００１２】
＜比較例３＞
前記スパウトの台座リングの下面に環状透かし部を設けない以外は実施例１と同様である。
【００１３】
上述の実施例１、比較例１、比較例２及び比較例３の４種類の口栓（スパウトにキャップを螺着）を５℃で２４時間保管したのち、それぞれ、液体紙容器の口栓取付孔に超音波シール機で溶着し、スパウトの封鎖板の環状薄肉脆弱線に発生するクラックの発生状況を調べた。その結果を表１に示す。なお、溶着条件は、２０Ｈｚで０．５秒間であった。
【００１４】
【表１】

【００１５】
表１に示すように、比較例１は、スパウトの封鎖板の環状薄肉脆弱線に発生するクラックの数が７／５０と最も多く、台座リングの下面に環透かし部を形成した比較例２、注出筒の内側下方に設ける封鎖板の環状薄肉脆弱線より外側の厚みを内側の封鎖板の厚みより薄くした比較例３は、比較例１に比べて環状薄肉脆弱線に発生するクラックの数が３／５０、４／５０と減っていた。実施例１には、環状薄肉脆弱線に発生するクラックは０／５０で無かった。これは、台座リングの下面に設けられた環状透かし部の作用と環状薄肉脆弱線より外側の封鎖板の厚みを内側の封鎖板の厚みより薄くした作用との相乗効果によるものと考えられる。
【００１６】
【発明の効果】
本発明のプルリング付口栓は、口栓を容器の口栓取付孔に超音波シール法で内付けで溶着するときに、台座リングの下面に設けられた環状透かし部の作用と環状薄肉脆弱線より外側の封鎖板の厚みを薄くした作用との相乗効果により、スパウトの封鎖板の環状薄肉脆弱線にクラックが発生しにくい。
【図面の簡単な説明】
【図１】本発明の一実施形態のプルリング付口栓の構造を示す断面図であり、２点鎖線は容器を示し、３点鎖線は超音波シール時のホーンの位置を示す。
【図２】一例の液体用紙容器の斜視図である。
【図３】従来の一例のプルリング付口栓の構造を示す断面図であり、２点鎖線は容器を示し、３点鎖線は超音波シール時のホーンの位置を示す。
【符号の説明】
１０……口栓
２０……容器
２１……胴部
２２……傾斜板
２３……口栓取付孔
３０……ホーン
１００……スパウト
１１０……台座リング
１１１……環状透かし部
１２０……注出筒
１２１……雄ネジ
１３０……閉鎖板
１３１……環状切込み
１３２……環状薄肉脆弱線
１３３……支柱
１３４……プルリング
１４０……フランジ
２００……キャップ
２１０……天板
２１１……インナー封止リング
２１２……コンタクト封止リング
２２０……周壁
２２１……雌ネジ
ｅ，Ｅ……厚み[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention comprises a spout which is internally provided by an ultrasonic sealing method at a pouring position of a liquid paper container or a soft packaging material container, and a cap which is attached to the spout, and a thin brittle line is broken by a pull ring. And a spout with a pull ring that opens the spout.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, for example, in a liquid paper container used for liquid contents of foods and non-foods, in consideration of ease of use at the time of use, as shown in FIG. A liquid paper container (20) in which a spout (100) and a cap (200) comprising a spout (100) protrude from an inclined plate (22) at the top of a gable roof has been used over a wide range of applications. . For example, as shown in FIG. 3, a cap (200) is screwed into a spout (120) of a spout (100) projecting from a plug mounting hole (23) of a container (20). However, in order to ensure the perfect sealing property at the time of distribution and the virgin property or to have easy opening property at the time of use, a sealing plate (130) is provided on the lower inner surface inside the spout discharge tube (120). In order to stop and open at the time of use, an annular cut (131) having an inverted V-shaped vertical cross section is provided at a predetermined position on the lower surface of the sealing plate, and an annular thin weak line (132) is formed at the expected opening position on the upper surface. A pillar (133) having a pull ring (134) at its tip is provided upright on a predetermined side of the upper surface near the inside of the annular thin-wall weakened line, and when a plug is opened to open the container. , Remove cap (200) And pulling upward with a fingertip on the pull ring (134) housed inside the discharge tube (120) of the closing plate (100) to tear open the annular thin weak line (132) of the closing plate (130). I was After the spout was opened, the cap was screwed into the spout cylinder, attached and resealed after use.
[0003]
[Problems to be solved by the invention]
However, as shown in FIG. 3, the conventional spout (10) with a pull ring is provided with a spout (100) in a spout mounting hole (23) of a container (20) (shown by a two-dot chain line). When the upper surface of the flange (140) provided on the outer peripheral surface of the lower end of the pedestal ring (110) and the inner surface of the container are welded by the ultrasonic sealing method (internal), the horn (30) is projected. The vibration energy of the ultrasonic waves generated from the three-dot chain line causes a crack (crack) in the annular thin-walled weak line (132) of the sealing plate (130) provided inside the dispensing cylinder, and the sealing performance is improved. It was sometimes damaged.
[0004]
The present invention solves the above-mentioned problem of the conventional plug with a pull ring, and when the plug is internally welded to the plug mounting hole of the container by an ultrasonic sealing method, the annular shape of the sealing plate of the spout. An object of the present invention is to provide a plug with a pull ring, which is less likely to crack in a thin-walled weak wire.
[0005]
[Means for Solving the Problems]
That is, the first invention of the present invention comprises a spout and a cap attached to the spout, and the spout erects a pouring cylinder at an inner peripheral edge of an upper surface of a pedestal ring having a flange on a lower end outer peripheral surface. A sealing plate is provided below the inside of the pouring cylinder to seal it, and an annular thin weak line is formed at the expected opening position of the sealing plate. A pillar for connecting a pull ring is erected, and in a plug with a pull ring which is internally provided and projected into a plug mounting hole of a container by an ultrasonic sealing method, an annular watermark portion is formed on a lower surface of a pedestal ring of the spout, A cap with a pull ring, wherein the thickness of the sealing plate provided below the inside of the spout pouring cylinder is smaller than the thickness of the sealing plate inside the annular thin-wall weakened line. .
[0006]
In the second invention of the present invention, the height of the annular watermark provided on the lower surface of the spout pedestal ring is higher than half the thickness of the flange provided on the lower peripheral surface of the lower end of the spout pedestal ring, The cap with a pull ring according to the first invention, wherein the thickness of the sealing plate outside the thin annular weak line is approximately half the thickness of the sealing plate inside the thin annular weak line. It is.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
As shown in FIG. 1, the cap with pull ring (10) according to one embodiment of the present invention is internally provided in a plug mounting hole (23) of a liquid paper container or a soft packaging material container by an ultrasonic sealing method. It comprises a spout (100) and a cap (200) screwed onto the spout. In the spout, a spout cylinder (120) is erected on the inner peripheral edge of the upper surface of a pedestal ring (110) provided with a flange (140) on the outer peripheral surface at the lower end, and a sealing plate (130) is placed under the spout cylinder. The sealing plate is provided and sealed, and an annular thin weak line (132) is formed at a position where the sealing plate is to be opened. One end of the upper surface near the inside of the annular thin weak line is connected to a pull ring (134) at the tip. (133) is erected, an annular watermark portion (111) is formed substantially at the center of the lower surface of the pedestal ring in the left-right direction, and an outer side of the annular thin weak line of the sealing plate provided below the inside of the pouring cylinder. Is thinner than the thickness (E) of the sealing plate inside the annular thin brittle line, and a male screw (121) with a cap is provided on the outer peripheral surface of the pouring cylinder. The height of the above-mentioned annular watermark portion is higher than half the thickness of the flange, and the thickness of the sealing plate outside the annular thin-wall weakened line is almost the same as the thickness of the sealing plate inside the annular thin-wall weakened line. That is to make it half. The cap has a sealing ring for sealing the upper end of the spout pouring cylinder on the lower surface of the top plate, and a female screw with the spout on the inner peripheral surface of the peripheral wall. Spouts are usually made by injection molding using low-density polyethylene in order to make it easier to break when pulling the annular thin brittle line by pulling the pull ring, and the cap is made of polypropylene or high-density polyethylene. Is produced by an injection molding method. The spout can be attached to the container by projecting the spout cylinder (120) of the spout (100) into the spigot attachment hole (23) of the container (20) (shown by a two-dot chain line), and setting the base ring (110). ), The upper surface of the flange (140) provided on the outer peripheral surface of the lower end and the inner surface of the container are welded by ultrasonic vibration energy generated from the horn (30) (shown by a three-dot chain line) of the ultrasonic sealing machine. is there.
[0008]
When the plug of the present invention is internally provided and projected in the plug mounting hole of the container by the ultrasonic sealing method, ultrasonic vibration energy generated from the horn is also transmitted to the inside of the pedestal ring, but the pedestal ring has Since the annular watermark portion is provided substantially at the center of the lower surface in the left-right direction, when vibration energy is transmitted through the pedestal ring, the vibration energy is absorbed and attenuated by the annular watermark portion, and further, the annular thin wall of the sealing plate Since the thickness outside the weak line is thinner than the thickness of the sealing plate inside the annular thin weak line, the vibration energy is not easily transmitted to the annular thin weak line of the sealing plate, and the vibration plate of the ultrasonic vibration energy generated from the horn is closed. The influence on the annular thin brittle line is extremely reduced. As a result, it is possible to prevent the annular thin brittle line of the sealing plate from being broken by the vibration energy of the ultrasonic waves generated from the horn.
[0009]
<Example 1>
First, a spout (100) was produced by injection molding using low-density polyethylene. As shown in FIG. 1, the pouring cylinder (120) is erected on the inner peripheral edge of the upper surface of a pedestal ring (110) provided with a flange (140) on the lower peripheral surface, as shown in FIG. The lower part is provided with a sealing plate (130) for sealing, and a ring-shaped notch (131) having a triangular cross section is provided from the lower surface of the planned opening position of the sealing plate to form an annular thin weak line (132) on the upper surface. On one side of the upper surface near the inside of the annular thin weak line, a column (133) for connecting the pull ring (134) at the tip is erected, and the spout flange is located at the approximate center of the lower surface of the base ring in the left-right direction. An annular watermark portion (111) having a rectangular cross section at the same height as the thickness is formed, and a thickness (e) outside the annular thin weak line of the sealing plate provided below the inside of the pouring cylinder is defined as the annular thin weak line. Reduce the thickness (E) of the inner sealing plate to one half, On the outer peripheral surface provided with a male screw (121) of the cap. Next, the cap (200) was produced by injection molding using polypropylene. As shown in FIG. 1, an inner sealing ring (211) for sealing the upper end of the spout pouring cylinder is provided on the lower surface of the top plate (210). (Close contact) and a contact sealing ring (212) (the lower end is closely attached to the upper surface of the dispensing cylinder) adjacent to the outer side of the inner sealing ring, and a female screw (221) with the spout is provided on the inner peripheral surface of the peripheral wall. Was provided.
[0010]
<Comparative Example 1>
No annular watermark is provided on the lower surface of the spout pedestal ring, and the thickness outside the annular thin line of weakness of the sealing plate provided below the inside of the pouring cylinder is the same as the thickness of the sealing plate inside the annular thin line of weakness. This is the same as Example 1 except for the above.
[0011]
<Comparative Example 2>
It is the same as Example 1 except that the thickness of the sealing plate provided below the inside of the spout pouring cylinder outside the annular thin-wall weakened line was made the same as the thickness of the sealing plate inside the annular thin-wall weakened line.
[0012]
<Comparative Example 3>
This is the same as the first embodiment except that no annular watermark is provided on the lower surface of the pedestal ring of the spout.
[0013]
After storing the four types of plugs (the caps are screwed onto the spouts) of Example 1, Comparative Example 1, Comparative Example 2, and Comparative Example 3 at 5 ° C. for 24 hours, the plugs of the liquid paper containers are respectively attached. The holes were welded with an ultrasonic sealing machine, and the occurrence of cracks on the annular thin brittle line of the spout sealing plate was examined. Table 1 shows the results. The welding conditions were 0.5 Hz at 20 Hz.
[0014]
[Table 1]

[0015]
As shown in Table 1, Comparative Example 1 had the largest number of cracks generated in the annular thin brittle line of the sealing plate of the spout as 7/50, and Comparative Example 2 in which an annular watermark portion was formed on the lower surface of the pedestal ring. Comparative Example 3 in which the thickness outside the annular thin-walled weak line of the sealing plate provided below the inner side of the dispensing cylinder was smaller than the thickness of the inner sealing plate, the number of cracks generated in the annular thin-walled weak line as compared with Comparative Example 1. Decreased to 3/50 and 4/50. In Example 1, 0/50 cracks did not occur in the annular thin brittle line. This is considered to be due to a synergistic effect of the function of the annular watermark provided on the lower surface of the pedestal ring and the function of making the thickness of the sealing plate outside the thin annular weak line smaller than the thickness of the inside sealing plate.
[0016]
【The invention's effect】
The plug with a pull ring according to the present invention is characterized in that, when the plug is internally welded to the plug mounting hole of the container by an ultrasonic sealing method, the function of the annular watermark portion provided on the lower surface of the pedestal ring and the annular thin-walled weak line Due to the synergistic effect with the effect of reducing the thickness of the outer sealing plate, cracks are less likely to occur in the annular thin brittle line of the spout sealing plate.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing the structure of a plug with a pull ring according to an embodiment of the present invention, wherein a two-dot chain line shows a container, and a three-dot chain line shows a position of a horn at the time of ultrasonic sealing.
FIG. 2 is a perspective view of an example of a liquid paper container.
FIG. 3 is a cross-sectional view showing the structure of a conventional plug with a pull ring, where a two-dot chain line indicates a container and a three-dot chain line indicates the position of a horn during ultrasonic sealing.
[Explanation of symbols]
10 Plug 20 Container 21 Body 22 Inclined plate 23 Plug mounting hole 30 Horn 100 Spout 110 Base ring 111 Annular watermark 120 Cylinder 121 male screw 130 closing plate 131 annular cut 132 annular thin line 133 support column 134 pull ring 140 flange 200 flange 210 cap 210 top plate 211 inner seal Ring 212 Contact sealing ring 220 Peripheral wall 221 Female screw e, E Thickness

Claims

The spout comprises a spout and a cap to be attached to the spout, and the spout is provided with a spouting tube erected on an inner peripheral portion of an upper surface of a pedestal ring provided with a flange on a lower end outer peripheral surface, and a sealing plate is provided below the spouting tube. Is provided and sealed, an annular thin weak line is formed at an expected opening position of the sealing plate, and on one side of the upper surface near the inner side of the annular thin weak line, a column connecting a pull ring to the tip is erected, In a spout with a pull ring internally protruding from a spout mounting hole of a container by an ultrasonic sealing method, an annular watermark portion is formed on a lower surface of a pedestal ring of the spout, and an inner lower side of a spout cylinder of the spout. 2. A cap with a pull ring, wherein the thickness of the sealing plate provided on the outer side of the annular thin-wall weakened line is smaller than the thickness of the sealing plate inside the annular thin-wall weakened line.

The height of the annular watermark provided on the lower surface of the spout pedestal ring is higher than half the thickness of the flange provided on the outer peripheral surface of the lower end of the spout pedestal ring, and is greater than the thickness of the annular thin weak line of the sealing plate. 2. The cap with a pull ring according to claim 1, wherein the thickness of the outer side is set to approximately one half of the thickness of the sealing plate inside the annular thin weak line.