JP5662786B2 - Plastic outlet spout - Google Patents

Plastic outlet spout Download PDF

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JP5662786B2
JP5662786B2 JP2010278309A JP2010278309A JP5662786B2 JP 5662786 B2 JP5662786 B2 JP 5662786B2 JP 2010278309 A JP2010278309 A JP 2010278309A JP 2010278309 A JP2010278309 A JP 2010278309A JP 5662786 B2 JP5662786 B2 JP 5662786B2
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container
wall
annular
diameter
spout
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JP2012126414A (en
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直幸 安部
直幸 安部
勝己 橋本
勝己 橋本
勝広 村元
勝広 村元
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Nippon Closures Co Ltd
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本発明は、内面に少なくとも合成樹脂フィルムが積層された紙製容器に適用される合成樹脂製注出口栓、更に詳しくは容器に形成された注出孔を通して突出せしめられる突出筒壁とこの突出筒壁の下端部外周から半径方向外方に延出する環状フランジ壁とを具備し、環状フランジ壁の上面が容器の内面に溶着され、且つ環状フランジ壁には環状スコアが形成されている形態の合成樹脂製注出口栓に関する。   The present invention relates to a synthetic resin spout stopper applied to a paper container having an inner surface laminated with at least a synthetic resin film, and more specifically, a projecting cylindrical wall projecting through a pouring hole formed in the container and the projecting cylinder An annular flange wall extending radially outward from the outer periphery of the lower end of the wall, the upper surface of the annular flange wall is welded to the inner surface of the container, and an annular score is formed on the annular flange wall It relates to a spout made of synthetic resin.

下記特許文献１には、内面に少なくとも合成樹脂製フィルムが積層された紙製容器に適用されるポリエチレン製注出口栓が開示されている。かかる注出口栓は、容器に形成されている注出孔を通して突出せしめられる突出筒壁とこの突出筒壁の下端部外周から半径方向外方に延出する環状フランジ壁とを具備している。環状フランジ壁の上面は容器の内面に超音波溶着方式によって溶着される。更に、環状フランジ壁には環状スコアが形成されている。かかる環状スコアは、所謂分別回収のために、容器の内容物を消費した後に容器を破棄する際に破断され、かくして注出口栓の大部分が容器から分離される。   Patent Document 1 below discloses a polyethylene spout stopper that is applied to a paper container having an inner surface laminated with at least a synthetic resin film. Such a spout stopper includes a projecting cylindrical wall projecting through a spout hole formed in the container and an annular flange wall extending radially outward from the outer periphery of the lower end of the projecting cylindrical wall. The upper surface of the annular flange wall is welded to the inner surface of the container by an ultrasonic welding method. Further, an annular score is formed on the annular flange wall. Such an annular score is broken when the container is discarded after the contents of the container have been consumed for so-called fractional collection, thus separating most of the spout plug from the container.

特開平１０−１６９５０号公報Japanese Patent Laid-Open No. 10-16950

然るに、本発明者等の経験によれば、上記特許文献１に開示されている注出口栓には、容器の内容物を消費した後に環状スコアを破断し、次いで注出口栓を容器から離脱せしめる際に相当な力を必要とし、容器からの注出口栓の離脱が必ずしも容易でない、という問題が存在する。   However, according to the experience of the present inventors, the spout stopper disclosed in Patent Document 1 breaks the annular score after consuming the contents of the container, and then allows the spout stopper to be detached from the container. However, there is a problem that a considerable force is required, and the removal of the spout stopper from the container is not always easy.

本発明は上記事実に鑑みてなされたものであり、その主たる技術的課題は、環状スコアを破断した後に、過剰な力を必要とすることなく充分容易に容器から注出口栓を離脱することができる、新規且つ改良された合成樹脂製注出口栓を提供することである。   The present invention has been made in view of the above-mentioned facts, and the main technical problem thereof is that the spout can be easily detached from the container without requiring excessive force after breaking the annular score. A new and improved synthetic resin spout plug is provided.

本発明者等は、鋭意検討の結果、従来の注出口栓においては、容器の注出孔の内径が注出口栓に形成されている環状スコアの中心直径よりも小さく、それ故に注出口栓を容器から離脱する際には、容器の注出孔の周縁に存在する壁部を変形せしめて注出口栓のフランジを注出孔を通して移動せしめることが必要であり、それ故に容器から注出口栓を離脱するのに相当な力を必要とすることを認識した。そして、かかる認識に基いて、環状スコアの中心直径を注出孔の内径以下にせしめることによって上記主たる技術的課題を達成することができることを見出した。   As a result of intensive studies, the present inventors have found that in the conventional spout stopper, the inner diameter of the outlet hole of the container is smaller than the center diameter of the annular score formed in the spout stopper, and therefore the spout stopper is not provided. When detaching from the container, it is necessary to deform the wall part present at the periphery of the container's spout hole and move the spout flange through the spout hole. Recognized that considerable power was required to leave. And based on this recognition, it discovered that the said main technical subject could be achieved by making the center diameter of an annular score below the internal diameter of a pouring hole.

即ち、本発明によれば、上記主たる技術的課題を達成する合成樹脂製注出口栓として、内面に少なくとも合成樹脂フィルムが積層された紙製容器に適用される合成樹脂製注出口栓にして、該容器に形成された注出孔を通して突出せしめられる突出筒壁と該突出筒壁の下端部外周から半径方向外方に延出する環状フランジ壁とを具備し、該フランジ壁の上面が該容器の内面に溶着され、且つ該環状フランジ壁には環状スコアが形成されている合成樹脂製注出口栓において、
該環状スコアの中心直径Ｄ１は該容器の該注出孔の内径Ｄ２以下（Ｄ１≦Ｄ２）であり、
該突出筒壁は該環状フランジ壁の上面から上方に延出し且つ外径Ｄ３を有する最下端部と該最下端部に続いて上方に延出し且つ外径Ｄ４を有する下部とを有し、該外径Ｄ３は該中心直径Ｄ１より小さく（Ｄ３＜Ｄ１）、該外径Ｄ４は該中心直径Ｄ１以上で且つ該内径Ｄ２以下（Ｄ１≦Ｄ４≦Ｄ２）であり、該環状フランジ壁の上面から該突出筒壁の該最下端部の上端までの長さＬは該容器の該注出孔を規定している壁厚Ｔよりも小さい（Ｌ＜Ｔ）、
ことを特徴とする合成樹脂製注出口栓が提供される。 That is, according to the present invention, as a synthetic resin spout stopper that achieves the main technical problem, a synthetic resin spout stopper applied to a paper container having at least a synthetic resin film laminated on the inner surface, A projecting cylindrical wall projecting through a pouring hole formed in the container; and an annular flange wall extending radially outward from the outer periphery of the lower end of the projecting cylindrical wall, the upper surface of the flange wall being the container In the synthetic resin spout stopper, the annular flange wall is welded to the inner surface of the synthetic resin, and the annular score is formed on the annular flange wall.
The center diameter D1 of the annular score is not more than the inner diameter D2 (D1 ≦ D2) of the pouring hole of the container ,
The projecting cylindrical wall has a lowermost end portion extending upward from the upper surface of the annular flange wall and having an outer diameter D3, and a lower portion extending upward following the lowermost end portion and having an outer diameter D4, The outer diameter D3 is smaller than the center diameter D1 (D3 <D1), the outer diameter D4 is not less than the center diameter D1 and not more than the inner diameter D2 (D1 ≦ D4 ≦ D2). The length L to the upper end of the lowest end portion of the protruding cylindrical wall is smaller than the wall thickness T defining the pouring hole of the container (L <T),
A synthetic resin spout stopper is provided.

本発明の合成樹脂製注出口栓においては、環状フランジに形成されている環状スコアの中心直径Ｄ１は容器の注出孔の内径Ｄ２以下であるので、環状スコアを破断した後においては、容器の注出孔の周縁に存在する壁部を変形せしめる必要なくして注出口栓のフランジを注出孔を通して移動せしめることができ、充分容易に容器から注出口栓を離脱せしめることができる。加えて、本発明の合成樹脂製注出口栓においては、環状スコアの中心直径Ｄ１は該容器の該注出孔の内径Ｄ２以下（Ｄ１≦Ｄ２）であり、突出筒壁は環状フランジ壁の上面から上方に延出し且つ外径Ｄ３を有する最下端部と最下端部に続いて上方に延出し且つ外径Ｄ４を有する下部とを有し、外径Ｄ３は中心直径Ｄ１より小さく（Ｄ３＜Ｄ１）、外径Ｄ４は中心直径Ｄ１以上で且つ内径Ｄ２以下（Ｄ１≦Ｄ４≦Ｄ２）であり、環状フランジ壁の上面から突出筒壁の最下端部の上端までの長さＬは容器の注出孔を規定している壁厚Ｔよりも小さい（Ｌ＜Ｔ）故に、容器の注出孔を通して注出口栓の突出筒壁を上方に突出せしめ、注出口栓の環状フランジ壁の上面を容器の内面に溶着せしめる際に、容器の注出孔と注出口栓との中心合わせに若干の誤差が生成されても、注出孔の内周縁が突出筒壁の下部の外周面に当接することによって、注出孔の内周縁が環状スコアの中心直径よりも半径方向内側に位置せしめられることがない。 In the synthetic resin spout stopper according to the present invention, since the center diameter D1 of the annular score formed on the annular flange is equal to or smaller than the inner diameter D2 of the outlet hole of the container, after breaking the annular score, The flange of the spout stopper can be moved through the spout hole without having to deform the wall portion present at the periphery of the spout hole, and the spout stopper can be detached from the container sufficiently easily. In addition, in the synthetic resin spout stopper of the present invention, the center diameter D1 of the annular score is equal to or less than the inner diameter D2 (D1 ≦ D2) of the outlet hole of the container, and the protruding cylindrical wall is the upper surface of the annular flange wall. And a lowermost portion having an outer diameter D3 and a lower portion extending upward and having an outer diameter D4. The outer diameter D3 is smaller than the center diameter D1 (D3 <D1). ), The outer diameter D4 is not less than the center diameter D1 and not more than the inner diameter D2 (D1 ≦ D4 ≦ D2), and the length L from the upper surface of the annular flange wall to the upper end of the lowest end of the projecting cylindrical wall is the dispensing of the container Since the wall thickness T is smaller than the wall thickness T defining the hole (L <T), the protruding cylindrical wall of the spout stopper is protruded upward through the outlet hole of the container, and the upper surface of the annular flange wall of the spout stopper is When welding to the inner surface, slightly align the center of the spout hole and spout stopper of the container. Even if an error is generated, the inner peripheral edge of the extraction hole comes into contact with the outer peripheral surface of the lower portion of the protruding cylindrical wall, so that the inner peripheral edge of the extraction hole is positioned radially inward from the center diameter of the annular score. There is no .

本発明に従って構成された合成樹脂製注出口栓の好適実施形態を、容器及び外蓋と共に図示する断面図。Sectional drawing which illustrates suitable embodiment of the synthetic resin pouring outlet stopper comprised according to this invention with a container and an outer cover. 図１に図示する注出口栓の平面図。The top view of the spout stopper illustrated in FIG. 図１に図示する注出口栓の底面図。The bottom view of the spout stopper illustrated in FIG. 図１に図示する注出口栓の部分拡大断面図。The partial expanded sectional view of the spout stopper shown in FIG. 本発明に従って構成された合成樹脂製注出口栓の他の好適実施形態を示す部分拡大断面図。The partial expanded sectional view which shows other suitable embodiment of the synthetic resin pouring stoppers comprised according to this invention.

以下、添付図面を参照して、本発明の合成樹脂製注出口栓の好適実施形態について、更に詳細に説明する。   Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the synthetic resin spout stopper of the present invention will be described in more detail.

図１には、本発明に従って構成された合成樹脂製注出口栓２と共に、注出口栓２が適用される容器４の一部及び注出口栓２に組み合わされる外蓋６が図示されている。   FIG. 1 shows a part of a container 4 to which the spout stopper 2 is applied and an outer lid 6 combined with the spout stopper 2 together with a synthetic resin spout stopper 2 configured according to the present invention.

図１と共に図２及び図３を参照して説明すると、適宜の合成樹脂、例えば密度が０．９０乃至０．９５ｇ／ｃｍ３程度である低密度ポリエチレン、から射出乃至圧縮成形することができる注出口栓２は、全体として略円筒形状である突出筒壁８とこの突出筒壁８の下端部、図示の実施形態においては最下端から半径方向外方に延出する円環状であるのが好適である環状フランジ壁１０とを具備している。突出筒壁８は最下端部１２、比較的肉厚の下部１４、下部１４から上方に実質上鉛直に延びる略円筒形状の延出部１６を有する。下部１４と延出部１６との境界には上方に向いた環状肩面２２が規定されている。環状肩面２２は実質上水平に延在せしめられているのが好都合である。下端部１４の外周面上端部には周方向に等間隔をおいて4個の突出片２４が配設されている。延出部１６の外周面下部には環状密封突条２６が形成されている。延出部１６の外周面には雄螺条２８が形成されている。また、延出部１６の上端面は断面図において略半円形状にせしめられており、その半径方向外端縁部はリップ形状をなしている。 2 and FIG. 3 together with FIG. 1, injection or compression molding can be performed from an appropriate synthetic resin, for example, low density polyethylene having a density of about 0.90 to 0.95 g / cm 3. The outlet plug 2 preferably has an annular shape that protrudes radially outward from the lower end portion of the protruding cylindrical wall 8 and the lower end portion of the protruding cylindrical wall 8 in the illustrated embodiment. And an annular flange wall 10. The protruding cylindrical wall 8 has a lowermost end portion 12, a relatively thick lower portion 14, and a substantially cylindrical extending portion 16 extending substantially vertically upward from the lower portion 14. An annular shoulder surface 22 facing upward is defined at the boundary between the lower portion 14 and the extending portion 16. Conveniently, the annular shoulder surface 22 extends substantially horizontally. Four protruding pieces 24 are arranged at equal intervals in the circumferential direction at the upper end portion of the outer peripheral surface of the lower end portion 14. An annular sealing ridge 26 is formed at the lower part of the outer peripheral surface of the extending portion 16. A male thread 28 is formed on the outer peripheral surface of the extending portion 16. Moreover, the upper end surface of the extension part 16 is made into the substantially semicircle shape in sectional drawing, The radial direction outer end edge part has comprised the lip shape.

延出部１６の下部内周面には実質上水平に延びる閉塞壁３０が配設されている。閉塞壁３０には環状破断スコア３２が形成されている。図３を参照することによって明確に理解されるとおり、環状破断スコア３２は円環形状であり、円形切り取り領域３４を規定している。切り取り領域３４の、図２において右端部上面には、上方に延びる連結柱３８が形成されており、この連結柱３８の上端にはリング４０が連結されている。図１及び図３を参照することによって理解される如く、突出筒壁８の最下端部１２及び下部１４の内周面には周方向に間隔をおいて複数個の凹部４２が形成されている。   A blocking wall 30 that extends substantially horizontally is disposed on the inner peripheral surface of the lower portion of the extending portion 16. An annular break score 32 is formed on the blocking wall 30. As clearly understood by referring to FIG. 3, the annular break score 32 is annular in shape and defines a circular cutout area 34. A connecting column 38 extending upward is formed on the upper surface of the right end portion of the cut region 34 in FIG. 2, and a ring 40 is connected to the upper end of the connecting column 38. As can be understood by referring to FIGS. 1 and 3, a plurality of recesses 42 are formed at intervals in the circumferential direction on the inner peripheral surfaces of the lowermost end portion 12 and the lower portion 14 of the protruding cylindrical wall 8. .

図１及び図３と共に図４を参照して説明を続けると、注出口栓２の環状フランジ壁１０の内周縁部には環状スコア４４が形成されている。円環状であるのが好適である環状スコア４４は、図示の実施形態においては、環状フランジ壁１０の下面に環状溝を配設することによって形成されている。例えば、注出口栓２が密度０．９０乃至０．９５ｇ／ｃｍ３程度の低密度ポリエチレンから形成されている場合、環状スコア４４の残留肉厚は０．１０乃至０．４０ｍｍ程度であるのが好適である。 When the description is continued with reference to FIG. 4 together with FIGS. 1 and 3, an annular score 44 is formed on the inner peripheral edge portion of the annular flange wall 10 of the spout stopper 2. In the illustrated embodiment, the annular score 44, which is preferably annular, is formed by disposing an annular groove on the lower surface of the annular flange wall 10. For example, when the spout stopper 2 is made of low-density polyethylene having a density of about 0.90 to 0.95 g / cm 3 , the residual thickness of the annular score 44 is about 0.10 to 0.40 mm. Is preferred.

図１及び図４を参照して説明を続けると、注出口栓２はそれ自体は周知の形態でよい容器４の注出孔５０に適用することができる。図１及び図４にはその一部のみを図示する容器４は、内面にアルミニウム箔５２及び合成樹脂フィルム５４が積層された厚紙５６から形成することができる。注出口栓２がポリエチレンから形成されている場合、溶着の容易性の点から、合成樹脂フィルム５４はポリエチレンフィルムであるのが好適である。図１及び図４に明確に図示する如く、注出口栓２の環状フランジ壁１０はその上面が容器４の内面に当接せしめられ、注出口栓２の突出筒壁８は容器４の注出孔５０を通して上方に突出せしめられる。図示の実施形態においては、注出口栓２の環状フランジ壁１０の、上記環状破断スコア４４よりも半径方向外側において環状フランジ壁１０の上面が容器４の内面に溶着せしめられる。図４においては、環状フランジ壁１０の上面が容器４の内面に溶着された環状溶着領域を太線５８で示している。かような溶着は、厚紙によって箱を完成するのに先立って、それ自体は周知の超音波溶着方式によって好都合に遂行するができる。   Continuing the description with reference to FIGS. 1 and 4, the spout stopper 2 can be applied to the spout hole 50 of the container 4, which may be in a known form. 1 and 4 can be formed from a cardboard 56 in which an aluminum foil 52 and a synthetic resin film 54 are laminated on the inner surface. When the spout stopper 2 is made of polyethylene, the synthetic resin film 54 is preferably a polyethylene film from the viewpoint of ease of welding. As clearly shown in FIGS. 1 and 4, the annular flange wall 10 of the spout stopper 2 is brought into contact with the inner surface of the container 4, and the protruding cylindrical wall 8 of the spout stopper 2 is poured out of the container 4. It protrudes upward through the hole 50. In the illustrated embodiment, the upper surface of the annular flange wall 10 is welded to the inner surface of the container 4 on the radially outer side of the annular fracture score 44 of the annular flange wall 10 of the spout stopper 2. In FIG. 4, an annular welding region in which the upper surface of the annular flange wall 10 is welded to the inner surface of the container 4 is indicated by a thick line 58. Such welding can be conveniently accomplished by an ultrasonic welding method known per se prior to completing the box with cardboard.

図４を参照して説明を続けると、本発明に従って構成された注出口栓２においては、上記環状スコア４４の中心直径（即ち環状スコア４４の半径方向中心の直径）Ｄ１は容器４の上記注出孔５０の内径Ｄ２以下（Ｄ１≦Ｄ２）であることが重要である（その理由は後述する）。更に、突出筒壁８の最下端部１２の外径Ｄ３は上記中心直径Ｄ１よりも小さく（Ｄ３＜Ｄ１）、突出筒壁８の下部１４の外径Ｄ４は上記中心直径Ｄ１以上で且つ上記内径Ｄ２以下（Ｄ１≦Ｄ４≦Ｄ２）であり、環状フランジ壁１０の上面から突出筒壁８の最下端部１２の上端までの長さＬは容器４の注出孔５０を規定している壁厚Ｔよりも小さい（Ｌ＜Ｔ）のが好ましい（その理由は後述する）。   Continuing with reference to FIG. 4, in the spout stopper 2 constructed according to the present invention, the center diameter of the annular score 44 (that is, the diameter in the radial center of the annular score 44) D <b> 1 is the same as that of the container 4. It is important that the inner diameter D2 or less (D1 ≦ D2) of the outlet hole 50 (the reason will be described later). Further, the outer diameter D3 of the lowermost end portion 12 of the protruding cylindrical wall 8 is smaller than the center diameter D1 (D3 <D1), and the outer diameter D4 of the lower portion 14 of the protruding cylindrical wall 8 is equal to or larger than the central diameter D1 and the inner diameter. D2 or less (D1 ≦ D4 ≦ D2), and the length L from the upper surface of the annular flange wall 10 to the upper end of the lowest end portion 12 of the projecting cylindrical wall 8 is the wall thickness defining the pouring hole 50 of the container 4 It is preferably smaller than T (L <T) (the reason will be described later).

図１を参照して説明すると、高密度ポリエチレン或いはポリプロピレンの如き適宜の合成樹脂から射出乃至圧縮成形することができる外蓋６は、円形天面壁６０とこの天面壁６０の外周縁から垂下する円筒形状のスカート壁６２を具備している。天面壁６０の内面には環状シール片６４が形成されている。スカート壁６２の内周面には、雌螺条６６が形成されている。図１に二点鎖線で示すように、外蓋６は注出口栓２の突出筒壁８に被嵌し、図１において上方から見て時計方向に回転せしめて、雌螺条６６を雄螺条２８に螺合せしめることによって突出筒壁８に装着される。外蓋６が注出口栓２の突出筒壁８に所要とおりに装着されると、外蓋６のシール片６４が注出口栓２の突出筒壁８の内周面上端部に密接せしめられ、そしてまた外蓋６のスカート壁６２の下端は注出口栓２の突出筒壁８に規定されている環状肩面２２に当接せしめられる。注出口栓２の突出筒壁８における直立円筒形状部１６の外周面下部に形成されている環状密封突条２６は、外蓋６のスカート壁６２の内周面に密接せしめられる。   Referring to FIG. 1, an outer lid 6 that can be injected or compression-molded from a suitable synthetic resin such as high-density polyethylene or polypropylene has a circular top wall 60 and a cylinder that hangs down from the outer periphery of the top wall 60. A shaped skirt wall 62 is provided. An annular seal piece 64 is formed on the inner surface of the top wall 60. A female thread 66 is formed on the inner peripheral surface of the skirt wall 62. As shown by a two-dot chain line in FIG. 1, the outer lid 6 is fitted on the protruding cylindrical wall 8 of the spout stopper 2, and is rotated clockwise as viewed from above in FIG. The protruding cylinder wall 8 is mounted by screwing with the strip 28. When the outer lid 6 is attached to the protruding cylindrical wall 8 of the spout stopper 2 as required, the seal piece 64 of the outer lid 6 is brought into close contact with the upper end portion of the inner peripheral surface of the protruding cylindrical wall 8 of the spout stopper 2. Further, the lower end of the skirt wall 62 of the outer lid 6 is brought into contact with the annular shoulder surface 22 defined by the protruding cylindrical wall 8 of the spout stopper 2. An annular sealing protrusion 26 formed on the lower portion of the outer peripheral surface of the upright cylindrical portion 16 in the protruding cylindrical wall 8 of the spout stopper 2 is brought into close contact with the inner peripheral surface of the skirt wall 62 of the outer lid 6.

容器４内の内容物を消費する際には、外蓋６を図１において上方から見て半時計方向に回転せしめて、雄螺条２８から雌螺条６６を離脱せしめ外蓋６を注出口栓２の突出筒壁８から離脱せしめる。次いで、注出口栓２のリング４０に指を掛けて引っ張り環状破断スコア３２を破断して切り取り領域３４を切り取り、閉鎖壁３０に排出開口を形成する。かくすると、容器４の注出孔５０及び閉鎖壁３０に形成された排出開口を通して容器４の内容物を排出することができる。   When the contents in the container 4 are consumed, the outer lid 6 is rotated counterclockwise as viewed from above in FIG. 1, the female screw 66 is detached from the male screw 28, and the outer lid 6 is spouted. The stopper 2 is detached from the protruding cylindrical wall 8. Next, a finger is put on the ring 40 of the spout stopper 2 to pull the annular break score 32 to cut the cut region 34, thereby forming a discharge opening in the closing wall 30. Thus, the contents of the container 4 can be discharged through the discharge hole 50 of the container 4 and the discharge opening formed in the closing wall 30.

容器４内の内容物を全て消費した後においては、所謂分別回収のために、容器４から注出口栓２の大部分、突出筒壁８及び環状フランジ壁１０における環状スコア４４よりも半径方向内側領域、を容器４から分離することが重要である。この際には、容器４の所要箇所に押圧力を加える、或いは本出願人の出願にかかる特願２００９−２２８１７５の明細書及び図面に記載されている様式によって、環状スコア４４を破断し、これによって容器４から注出口栓２の大部分を分離する。しかる後に、注出口栓２の大部分を図１及び図４において上方に移動せしめて容器４から離脱せしめる。本発明に従って構成された注出口栓２においては、環状スコア４４の中心直径Ｄ１は容器４の上記注出孔５０の内径Ｄ２以下（Ｄ１≦Ｄ２）である故に、注出口栓２を上方に移動せしめる際に容器４の注出孔５０を規定している壁部によって注出口栓２の移動が干渉されることがなく、過剰な力を必要とすることなく注出口栓２の大部分を容器４から離脱せしめることができる。   After all the contents in the container 4 have been consumed, the inside of the container 4 is more radially inward than the annular score 44 in the spout stopper 2, the protruding cylindrical wall 8 and the annular flange wall 10 for so-called separate collection. It is important to separate the area from the container 4. At this time, the annular score 44 is broken by applying a pressing force to a required portion of the container 4 or by the manner described in the specification and drawings of Japanese Patent Application No. 2009-228175 filed by the present applicant. To separate most of the spout 2 from the container 4. Thereafter, most of the spout stopper 2 is moved upward in FIGS. 1 and 4 to be detached from the container 4. In the spout stopper 2 configured according to the present invention, the center diameter D1 of the annular score 44 is equal to or smaller than the inner diameter D2 of the spout hole 50 of the container 4 (D1 ≦ D2). During the caulking, the movement of the spout stopper 2 is not interfered by the wall portion defining the spout hole 50 of the container 4, and most of the spout stopper 2 is placed in the container without requiring excessive force. 4 can be removed.

図示の注出口栓２については、更に、次の事実も留意されるべきである。即ち、突出筒壁８の最下端部１２の外径Ｄ３は中心直径Ｄ１よりも小さく（Ｄ３＜Ｄ１）、突出筒壁８の下部１４の外径Ｄ４は上記中心直径Ｄ１以上で且つ上記内径Ｄ２以下（Ｄ１≦Ｄ４≦Ｄ２）であり、環状フランジ壁１０の上面から突出筒壁８の最下端部１２の上端までの長さＬは容器４の注出孔５０を規定している壁厚Ｔよりも小さく（Ｌ＜Ｔ）設定されている。従って、容器４の注出孔５０を通して注出口栓２の突出筒壁８を上方に突出せしめ、注出口栓２の環状フランジ壁１０の上面を容器４の内面に溶着せしめる際に、容器４の注出孔５０と注出口栓２との中心合わせに若干の誤差が生成されても、注出孔５０の内周縁が突出筒壁８の下部１４の外周面に当接することによって、注出孔５０の内周縁が環状スコア４４の中心直径よりも半径方向内側に位置せしめられることがなく、かくして注出口栓２を上方に移動せしめる際に容器４の注出孔５０を規定している壁部によって注出口栓２の移動が干渉されることが確実に回避される。   For the spout plug 2 shown, the following fact should also be noted. That is, the outer diameter D3 of the lowermost end portion 12 of the protruding cylindrical wall 8 is smaller than the central diameter D1 (D3 <D1), and the outer diameter D4 of the lower portion 14 of the protruding cylindrical wall 8 is equal to or larger than the central diameter D1 and the inner diameter D2. Hereinafter, (D1 ≦ D4 ≦ D2), and the length L from the upper surface of the annular flange wall 10 to the upper end of the lowest end portion 12 of the protruding cylindrical wall 8 is the wall thickness T that defines the pouring hole 50 of the container 4 Smaller than (L <T). Therefore, when the protruding cylindrical wall 8 of the spout stopper 2 protrudes upward through the outlet hole 50 of the container 4 and the upper surface of the annular flange wall 10 of the spout stopper 2 is welded to the inner surface of the container 4, Even if a slight error is generated in the alignment between the pouring hole 50 and the pouring outlet plug 2, the inner peripheral edge of the pouring hole 50 abuts on the outer peripheral surface of the lower portion 14 of the protruding cylindrical wall 8. 50, the inner peripheral edge is not positioned radially inward of the center diameter of the annular score 44, and thus the wall defining the outlet hole 50 of the container 4 when the outlet stopper 2 is moved upward. This reliably prevents the movement of the spout 2 from being interfered with.

図５は本発明に従って構成された合成樹脂製注出口栓の他の実施形態を図示している。図５に図示する実施形態においては、環状フランジ壁１０の内周縁部には、更に、環状スコア４４に隣接してその半径方向外側と半径方向内側とに配設された環状付加スコア７０及び７２が形成されている。円環状であるのが好適である環状付加スコア７０及び７２は共に、環状スコア４４と同様に、環状フランジ壁１０の下面に環状溝を形成することによって形成されている。環状付加スコア７０及び７２の残留肉厚は環状スコア４４の残留肉厚よりも大きいのが好都合である。例えば、注出口栓２が密度０．９０乃至０．９５ｇ／ｃｍ３程度の低密度ポリエチレンから形成されている場合、環状付加スコア７０及び７２の残留肉厚は０．１５乃至０．５５ｍｍ程度であるのが好適である。本出願人の出願に係る特願２００９−２９１０１０の明細書に詳細に記載されている如く、環状スコア４４に加えて環状付加スコア７０及び７２を配設すると、次のとおりの作用効果が達成される。溶着領域５８に超音波を施すと、溶着領域５８には超音波衝撃が加えられるが、溶着領域５８に加えられた超音波衝撃が環状付加スコア７０及び７２よって緩衝され、環状スコア４４或いは環状破断スコア３２が損傷されてしまうことが回避される。そしてまた、落下に起因して注出口栓２に相当な衝撃が加えられても、環状スコア４４或いは破断スコア３２が損傷されることが可及的に回避される。 FIG. 5 illustrates another embodiment of a synthetic resin spout stopper constructed in accordance with the present invention. In the embodiment illustrated in FIG. 5, annular additional scores 70 and 72 are further provided on the inner peripheral edge of the annular flange wall 10 adjacent to the annular score 44 and radially outward and radially inward. Is formed. Both the annular additional scores 70 and 72, which are preferably annular, are formed by forming an annular groove in the lower surface of the annular flange wall 10, similar to the annular score 44. Conveniently, the residual thickness of the annular addition scores 70 and 72 is greater than the residual thickness of the annular score 44. For example, when the spout stopper 2 is made of low density polyethylene having a density of about 0.90 to 0.95 g / cm 3 , the residual thickness of the annular addition scores 70 and 72 is about 0.15 to 0.55 mm. Preferably there is. As described in detail in the specification of Japanese Patent Application No. 2009-291010 filed by the present applicant, when the circular addition scores 70 and 72 are provided in addition to the cyclic score 44, the following effects are achieved. The When ultrasonic waves are applied to the welding region 58, an ultrasonic shock is applied to the welding region 58, but the ultrasonic shock applied to the welding region 58 is buffered by the circular additional scores 70 and 72, and the circular score 44 or the circular fracture It is avoided that the score 32 is damaged. Further, even if a considerable impact is applied to the spout stopper 2 due to the fall, it is avoided as much as possible that the annular score 44 or the break score 32 is damaged.

２：注出口栓
４：容器
６：外蓋
８：突出筒壁
１０：環状フランジ壁
１２：突出筒壁の最下端部
１４：突出筒壁の下部
４４：環状スコア
５０：注出孔
５８：溶着領域 2: Outlet plug 4: Container 6: Outer lid 8: Projecting cylinder wall 10: Annular flange wall 12: Bottom end of the projecting cylinder wall 14: Lower part of the projecting cylinder wall 44: Annular score 50: Outlet hole 58: Welding region

Claims (1)

内面に少なくとも合成樹脂フィルムが積層された紙製容器に適用される合成樹脂製注出口栓にして、該容器に形成された注出孔を通して突出せしめられる突出筒壁と該突出筒壁の下端部外周から半径方向外方に延出する環状フランジ壁とを具備し、該フランジ壁の上面が該容器の内面に溶着され、且つ該環状フランジ壁には環状スコアが形成されている合成樹脂製注出口栓において、
該環状スコアの中心直径Ｄ１は該容器の該注出孔の内径Ｄ２以下（Ｄ１≦Ｄ２）であり、
該突出筒壁は該環状フランジ壁の上面から上方に延出し且つ外径Ｄ３を有する最下端部と該最下端部に続いて上方に延出し且つ外径Ｄ４を有する下部とを有し、該外径Ｄ３は該中心直径Ｄ１より小さく（Ｄ３＜Ｄ１）、該外径Ｄ４は該中心直径Ｄ１以上で且つ該内径Ｄ２以下（Ｄ１≦Ｄ４≦Ｄ２）であり、該環状フランジ壁の上面から該突出筒壁の該最下端部の上端までの長さＬは該容器の該注出孔を規定している壁厚Ｔよりも小さい（Ｌ＜Ｔ）、
ことを特徴とする合成樹脂製注出口栓。 A projecting cylindrical wall projecting through a pouring hole formed in the container, and a lower end portion of the projecting cylindrical wall as a synthetic resin spout stopper applied to a paper container having an inner surface laminated with at least a synthetic resin film An annular flange wall extending radially outward from the outer periphery, wherein the upper surface of the flange wall is welded to the inner surface of the container, and an annular score is formed on the annular flange wall. At the exit plug,
The center diameter D1 of the annular score is not more than the inner diameter D2 (D1 ≦ D2) of the pouring hole of the container ,
The projecting cylindrical wall has a lowermost end portion extending upward from the upper surface of the annular flange wall and having an outer diameter D3, and a lower portion extending upward following the lowermost end portion and having an outer diameter D4, The outer diameter D3 is smaller than the center diameter D1 (D3 <D1), the outer diameter D4 is not less than the center diameter D1 and not more than the inner diameter D2 (D1 ≦ D4 ≦ D2). The length L to the upper end of the lowest end portion of the protruding cylindrical wall is smaller than the wall thickness T defining the pouring hole of the container (L <T),
Synthetic resin spout stopper.
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