JP7141812B2 - Container lid with metal body and synthetic resin liner - Google Patents

Container lid with metal body and synthetic resin liner Download PDF

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JP7141812B2
JP7141812B2 JP2017025771A JP2017025771A JP7141812B2 JP 7141812 B2 JP7141812 B2 JP 7141812B2 JP 2017025771 A JP2017025771 A JP 2017025771A JP 2017025771 A JP2017025771 A JP 2017025771A JP 7141812 B2 JP7141812 B2 JP 7141812B2
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layer
outer peripheral
peripheral edge
region
liner
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JP2018131234A (en
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俊平 下地
英典 近藤
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Nippon Closures Co Ltd
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Nippon Closures Co Ltd
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Priority to KR1020197019643A priority patent/KR102592793B1/en
Priority to US16/485,004 priority patent/US20190359398A1/en
Priority to EP18755003.3A priority patent/EP3584192B1/en
Priority to PCT/JP2018/003432 priority patent/WO2018150896A1/en
Priority to CN201880006359.6A priority patent/CN110167848B/en
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Priority to JP2021082410A priority patent/JP7506027B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
    • B65D53/04—Discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Description

本発明は、円形状の天面壁とこの天面壁の周縁から垂下する円筒形状のスカート壁とを有する金属薄板製本体及び本体の天面壁の内面に配設された合成樹脂製ライナーを備えた容器蓋に関する。 The present invention is a container comprising a sheet metal main body having a circular top wall and a cylindrical skirt wall hanging down from the periphery of the top wall, and a synthetic resin liner disposed on the inner surface of the top wall of the main body. Regarding the lid.

アルミニウム基合金の如き金属薄板から形成され、円筒形状の口頸部の上端部には外巻カールが形成され、口頸部の外周面には雌螺条とその下方に位置する係止あご部が形成されている、一般にボトル缶と称されている容器に特に適する容器蓋として、下記特許文献１及び２には、円形状の天面壁とこの天面壁の周縁から垂下する円筒形状のスカート壁とを有する金属薄板製本体及び本体の天面壁内面に配設された合成樹脂製ライナーを備えた容器蓋が開示されている。本体のスカート壁の上端部には環状凹部が形成されている。ライナーは天面壁の内面に供給された硬質合成樹脂材料を型押成形することによって成形された第一層及びこの第一層の下面に供給された軟質合成樹脂材料を型押成形することによって成形された第二層とから構成されている。ライナーの第一層は、本体の天面壁の内面に沿って延在する円形状の中央部及び本体の天面壁の外周縁部及びスカート壁の上端部に沿って延在する円環形状の外周縁部を有し、ライナーの第二層は第一層の中央部に積層されている。 It is made of a thin metal plate such as an aluminum-based alloy, and has an outer curl formed at the upper end of the cylindrical mouth and neck portion, and a female screw thread and a locking jaw located below it on the outer peripheral surface of the mouth and neck portion. Patent Documents 1 and 2 below disclose a circular top wall and a cylindrical skirt wall that hangs down from the periphery of the top wall as a container lid particularly suitable for a container generally called a bottle can. and a synthetic resin liner disposed on the inner surface of the top wall of the main body. An annular recess is formed in the upper end of the skirt wall of the body. The liner is formed by embossing a first layer formed by embossing a hard synthetic resin material supplied to the inner surface of the top wall, and by embossing a soft synthetic resin material supplied to the lower surface of this first layer. and a second layer. The first layer of the liner includes a circular central portion extending along the inner surface of the top wall of the main body and an outer annular portion extending along the outer peripheral edge of the top wall of the main body and the upper end of the skirt wall. It has a peripheral edge and the second layer of liner is laminated to the central portion of the first layer.

特開２０１５－３３２５公報Japanese Patent Application Laid-Open No. 2015-3325 特開２０１６－２６９６１公報Japanese Patent Application Laid-Open No. 2016-26961

而して、本発明者等の経験によれば、上述した形態の従来の容器蓋には、（１）第二層を型押成形する際に第一層の外周縁部における半径方向内側領域、即ち外周縁部における中央部に隣接する部分、が破損されてしまう虞が少なくない、（２）第二層を型押成形する際に第二層を成形するための合成樹脂が充分円滑に所要とおりに流動せず、所要形状の第二層を型押成形することができないことがある、という解決すべき問題が存在することが判明している。 According to the experience of the present inventors, the above-described conventional container lid has the following drawbacks: (1) a radially inner region at the outer peripheral edge of the first layer when the second layer is stamped; (2) When the second layer is stamped, the synthetic resin for molding the second layer is sufficiently smooth. It has been found that there is a problem to be solved that it may not flow as desired and it may not be possible to stamp the second layer with the desired shape.

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、使用材料の使用量の相当な増大等の別個の問題を発生せしめることなく、第二層を型押成形する際に第一層の外周縁部における半径方向内側領域が破損されてしまうことが可及的に回避され、そしてまた所要形状の第二層を確実に型押成形することができる、新規且つ改良された容器蓋を提供することである。 The present invention has been made in view of the above facts, and its main technical problem is to emboss the second layer without causing separate problems such as a considerable increase in the amount of material used. A new and improved structure which avoids, as far as possible, damage to the radially inner region at the outer peripheral edge of the first layer , and also ensures that the desired shape of the second layer can be embossed. It is to provide a container lid that is made to last.

本発明者等は、鋭意研究及び事件の結果、第二層を型押成形する際に第一層の外周縁部の半径方向内側領域が破損されてしまうのは、通常は隣接する中央部の半径方向外側領域の厚さと同一である外周縁部の半径方向内側領域の厚さが過小であり、第二層を型押成形するための成形型部品が相当な押圧力で当接することに対して充分な耐性を有しないことに起因することを認識した。そして、かかる認識を踏まえて、第一層の外周縁部の半径方向内側領域の厚さを中央部の半径方向外側領域の厚さよりも大きくして中央部と外周縁部との境界に段差が存在せしめることによって、上記第一の課題を解決することができることを見出した（中央部の半径方向外側領域の厚さも同様に増大せしめて段差を存在せしめない場合も上記第一の課題を解決することができるが、かくすると第一層の成形に必要な材料量が増大してしまう）。そしてまた、鋭意検討及び実験の結果、第一層の中央部に半径方向外方に向かって厚さが漸次低減する円環形状の厚さ変動領域を存在せしめると、第二層を型押成形する際に第二層を成形するための合成樹脂材料が充分円滑に流動せしめることができることを見出した。 As a result of intensive research and incidents, the inventors of the present invention have found that the reason why the radially inner region of the outer peripheral edge of the first layer is damaged when the second layer is stamped is that the adjacent central portion is usually damaged. Against the fact that the thickness of the radially inner region of the outer peripheral edge, which is identical to the thickness of the radially outer region, is too small so that the mold parts for stamping the second layer abut with a considerable pressing force. I recognized that it was caused by not having sufficient resistance to Based on this recognition, the thickness of the radially inner region of the outer peripheral edge of the first layer is made larger than the thickness of the radially outer region of the central portion to form a step at the boundary between the central portion and the outer peripheral edge. It has been found that the first problem can be solved by allowing the step to exist (the first problem can be solved even if the thickness of the radially outer region of the central portion is similarly increased to prevent the step from existing). possible, but doing so would increase the amount of material required to mold the first layer). Further, as a result of intensive studies and experiments, it was found that the second layer was formed by embossing when an annular thickness variation region in which the thickness gradually decreased radially outward was provided in the central portion of the first layer. It has been found that the synthetic resin material for molding the second layer can flow sufficiently smoothly when molding.

即ち、本発明によれば、上記主たる技術的課題を達成する容器蓋として、円形状の天面壁及び該天面壁の周縁から垂下する円筒形状のスカート壁を有する金属薄板製本体と、該本体の該天面壁の内面に配設された合成樹脂製ライナーとを備え、
該本体における該天面壁と該スカート壁との境界領域は横断面において円弧形状であり、該スカート壁の上端部には周方向に連続して延びる環状凹部が形成されており、
該ライナーは該天面壁の内面に供給された硬質合成樹脂材料を型押成形することによって成形された第一層及び該第一層の下面に供給された軟質合成樹脂材料を型押成形することによって成形された第二層から構成されており、
該ライナーの該第一層は、該本体の該天面壁の内面に沿って延在する円形状の中央部と該本体の該天面壁の外周縁部内面及び該スカート壁の上端部内面に沿って延在し横断面において円弧形状である円環形状の外周縁部とを有し、
該ライナーの該第二層は、該第一層の該中央部に積層されており、円形状の薄肉中央部と円環形状の厚肉外周縁部とを有し、該厚肉外周縁部が容器の口頸部に密接される、
容器蓋において、
該ライナーの該第一層の該外周縁部の半径方向内側領域の肉厚は該中央部の半径方向外側領域の肉厚よりも大きく、該中央部と該外周縁部との境界には段差が存在し、
該第一層の該中央部には半径方向外方に向かって厚さが漸次低減する円環形状の厚さ変動領域が存在し、該厚さ変動領域の外周縁は該第二層の該厚肉外周縁部の内周縁に近接してその半径方向内側に位置する、
ことを特徴とする容器蓋が提供される。 That is, according to the present invention, as a container lid for achieving the above main technical problems, a sheet metal body having a circular top wall and a cylindrical skirt wall hanging down from the peripheral edge of the top wall; a synthetic resin liner disposed on the inner surface of the top wall,
A boundary region between the top wall and the skirt wall in the main body has an arcuate cross section, and an annular recess extending continuously in the circumferential direction is formed at the upper end of the skirt wall,
The liner is formed by embossing a first layer formed by embossing a hard synthetic resin material supplied to the inner surface of the top wall and a soft synthetic resin material supplied to the lower surface of the first layer. It consists of a second layer molded by
The first layer of the liner includes a circular central portion extending along the inner surface of the top wall of the main body, the inner surface of the outer peripheral edge portion of the top wall of the main body, and the inner surface of the upper end portion of the skirt wall. and an annular outer peripheral edge that extends through and is arcuate in cross section,
The second layer of the liner is laminated on the central portion of the first layer and has a circular thin central portion and an annular thick outer peripheral edge portion. is brought into close contact with the mouth and neck of the container,
In the container lid,
The thickness of the radially inner region of the outer peripheral edge of the first layer of the liner is greater than the thickness of the radially outer region of the central portion, and a step is provided at the boundary between the central portion and the outer peripheral edge of the liner. exists and
In the central portion of the first layer, there is an annular thickness variation region whose thickness gradually decreases radially outward, and the outer peripheral edge of the thickness variation region is the second layer. located radially inward of and adjacent to the inner peripheral edge of the thickened outer peripheral edge;
There is provided a container lid characterized by:

該段差は０．０５乃至０．４０ｍｍであるのが好適である。該第二層の該厚肉外周縁部の半径方向内側領域には下方に突出する環状突出部が存在するのが好都合である。該第二層の該薄肉中央部における該厚さ変動領域に対向する領域では該厚さ変動領域の厚さ変動に応じて厚さが半径方向外方に向かって漸次増大するのが好都合である。該厚さ変動領域は水平に対して０．５乃至３．０度の傾斜角度で傾斜するのが望ましい。口頸部の先端には外巻カールが形成されている金属薄板製容器に適用され、該ライナーの該第二層の該環状突出部の外周面が該外巻カールの内周面上端部に密接されると共に該環状突出部よりも半径方向外側に位置する該厚肉外周縁部の半径方向外側領域の下面が該外巻カールの上面乃至外周面に密接されるのが好都合である。 The step is preferably 0.05 to 0.40 mm . Advantageously , there is a downwardly projecting annular projection in the radially inner region of the thickened peripheral edge of the second layer. Advantageously, in the region of the thin central portion of the second layer facing the thickness variation region, the thickness gradually increases radially outward in accordance with the thickness variation of the thickness variation region. . Preferably, the thickness variation region is inclined at an inclination angle of 0.5 to 3.0 degrees with respect to the horizontal. Applied to a sheet metal container having an outer curl formed at the tip of the neck portion, and the outer peripheral surface of the annular protrusion of the second layer of the liner is at the upper end of the inner peripheral surface of the outer curl. Advantageously, the lower surface of the radially outer region of the thickened outer peripheral edge, which is in close contact and is located radially outwardly of the annular projection, is in close contact with the upper surface or outer peripheral surface of the unturned curl.

本明細書及び特許請求の範囲において使用する語句「上」及び「下」は、容器蓋の正立状態（即ち図１乃至図３に図示する状態）における上及び下を意味する。 The terms "upper" and "lower" as used herein and in the claims mean above and below the container lid in its upright position (ie, the position shown in FIGS. 1-3).

本発明の容器蓋においては、ライナーの第一層の外周縁部の半径方向内側領域の肉厚は中央部の半径方向外側領域の肉厚よりも大きく、中央部と外周縁部との境界には段差が存在し、それ故に第一層の成型に必要な材料量を過大に増大せしめることなくライナーの第一層の外周縁部の半径方向内側領域の肉厚が充分な厚さにすることができ、第二層を型押成形する際に第一層の外周縁部における半径方向内側領域が破損されてしまうことを可及的に回避することができる。そしてまた、第一層の中央部には半径方向外方に向かって厚さが漸次低減する円環形状の厚さ変動領域が存在し、それ故に厚さ変動領域の存在によって第二層を型押成形する際に材料の流動が助長され、所要形状の第二層を確実に型押成形することができる。 In the container lid of the present invention, the thickness of the radially inner region of the outer peripheral edge of the first layer of the liner is greater than the thickness of the radially outer region of the central portion, and the boundary between the central portion and the outer peripheral edge is The thickness of the radially inner region of the outer peripheral edge of the first layer of the liner should be sufficient without the presence of a step and, therefore , excessively increasing the amount of material required to mold the first layer. This makes it possible to avoid damage to the radially inner region of the outer peripheral edge of the first layer when the second layer is embossed. In addition, in the central portion of the first layer, there is an annular thickness variation region in which the thickness gradually decreases radially outward. The flow of the material is promoted during press molding, and the second layer of the desired shape can be reliably press molded.

本発明に従って構成された容器蓋の好適実施形態の、一部を断面で示す正面図。1 is a front view, partially in section, of a preferred embodiment of a container closure constructed in accordance with the present invention; FIG. 図１の一部を拡大して示す拡大図。The enlarged view which expands and shows a part of FIG. 図１に示す容器蓋を薄板製容器の口頸部に装着して口頸部を密封した状態の、一部を断面で示す正面図。FIG. 2 is a front view partially showing a cross section of a state in which the container lid shown in FIG. 図３の一部を拡大して示す拡大図。The enlarged view which expands and shows a part of FIG.

以下、本発明に従って構成された容器蓋の好適実施形態を図示している添付図面を参照して、更に詳細に説明する。 Reference will now be made in more detail to the accompanying drawings which illustrate preferred embodiments of container closures constructed in accordance with the present invention.

図１を参照して説明すると、本発明に従って構成された、全体を番号２で示す容器蓋は、金属薄板製本体４と合成樹脂製ライナー６とを備えている。 Referring to FIG. 1, a container lid, generally designated 2, constructed in accordance with the present invention comprises a sheet metal body 4 and a synthetic resin liner 6. As shown in FIG.

アルミニウム基合金薄板の如き適宜の金属薄板から形成することができる本体４は、円形状の天面壁８及びこの天面壁８の周縁から垂下する円筒形状のスカート壁１０を有する。天面壁８とスカート壁１０との境界領域は横断面において円弧形状である。スカート壁１０の上端部には周方向に連続して延びる環状凹部１２が形成されている。また、この環状凹部１２の直ぐ下方の領域においては、周方向に間隔をおいて周方向に延びる複数個のスリット（切り込み）１４が形成され、かかるスリット１４の下方に位置する領域が半径方向内方に変位されている。スカート壁１０の下端部には周方向破断可能ライン１６が配設されていて、スカート壁１０は周方向破断可能ライン１６よりも上方の主部１８と周方向破断可能ライン１６よりも下方のテンパーエビデント裾部２０とに区画されている。図示の実施形態における周方向破断可能ライン１６は、周方向に間隔をおいて周方向に延びる複数個のスリット２２とかかるスリット２２間に残留せしめられた複数個の橋絡部２４とから構成されており、タンパーエビデント裾部２０は複数個の橋絡部２４を介して主部１８に接続されている。かような本体４自体は周知の形態であり、それ故に本体４の詳細な説明は本明細書においては省略する。 The body 4, which can be formed from a suitable sheet metal such as an aluminum-based alloy sheet, has a circular top wall 8 and a cylindrical skirt wall 10 depending from the periphery of the top wall 8. As shown in FIG. A boundary region between the top wall 8 and the skirt wall 10 has an arc shape in cross section. An annular recess 12 extending continuously in the circumferential direction is formed in the upper end of the skirt wall 10 . A plurality of slits (notches) 14 extending in the circumferential direction are formed in a region immediately below the annular recess 12, and the region located below the slits 14 extends radially inward. displaced in the direction of A circumferentially breakable line 16 is provided at the lower end of the skirt wall 10 , and the skirt wall 10 has a main portion 18 above the circumferentially breakable line 16 and a temper portion below the circumferentially breakable line 16 . It is divided into an evidence skirt portion 20 and the evidence skirt portion 20 . The circumferential breakable line 16 in the illustrated embodiment is composed of a plurality of circumferentially extending slits 22 spaced apart in the circumferential direction and a plurality of bridging portions 24 remaining between the slits 22. The tamper-evident skirt portion 20 is connected to the main portion 18 via a plurality of bridging portions 24 . Such body 4 itself is of well-known form and therefore a detailed description of body 4 is omitted herein.

図１と共に図２を参照して説明を続けると、ライナー６は第一層２６及び第二層２８から構成されている。第一層２６は、上記本体４の天面壁８の内面に供給された合成樹脂材料を型押成形することによって成形される。更に詳しくは、本体４を倒立状態にして基台（図示していない）上に保持し、天面壁８の中央部に軟化溶融状態の合成樹脂材料を供給し、かかる合成樹脂材料に所要形状の型押部材（図示していない）を所要圧力で押圧することによって成形される。第一層２６は、ポリエチレン或いはポリプロピレンの如きガスバリア性に優れた硬質合成樹脂から成形されていることが重要である。然るに、第一層２６は密封層を構成する第二層２８よりもガスバリア性が高い。第二層２８は第一層２６の下面に供給された合成樹脂材料を型押成形することによって成形される。更に詳しくは、第一層２６が成形された本体２を倒立状態にして基台（図示していない）上に保持し、第一層２６の中央部に軟化溶融状態の合成樹脂材料を供給し、かかる合成樹脂材料を所要形状の型押部材（図示していない）を所要圧力で押圧することによって成形される。第二層２８は、ポリエチレン或いはエラストマーの如きシール性に優れた軟質合成樹脂から成形されていることが重要である。 Continuing with FIG. 2 in conjunction with FIG. 1, liner 6 is comprised of first layer 26 and second layer 28 . The first layer 26 is formed by embossing a synthetic resin material supplied to the inner surface of the top wall 8 of the main body 4 . More specifically, the main body 4 is held on a base (not shown) in an inverted state, a synthetic resin material in a softened and melted state is supplied to the central portion of the top wall 8, and a desired shape is formed on the synthetic resin material. It is shaped by pressing a embossing member (not shown) with the required pressure. It is important that the first layer 26 is molded from a hard synthetic resin such as polyethylene or polypropylene which has excellent gas barrier properties. Accordingly, the first layer 26 has a higher gas barrier property than the second layer 28 constituting the sealing layer. The second layer 28 is formed by stamping a synthetic resin material supplied to the underside of the first layer 26 . More specifically, the main body 2 having the first layer 26 formed thereon is held upside down on a base (not shown), and a softened and melted synthetic resin material is supplied to the central portion of the first layer 26. The synthetic resin material is molded by pressing a embossing member (not shown) having a required shape with a required pressure. It is important that the second layer 28 is molded from a soft synthetic resin such as polyethylene or elastomer which has excellent sealing properties.

第一層２６は本体４の天面壁８の内面に沿って延在する円形状の中央部３０と本体４の天面壁８の外周縁部内面及びスカート壁１０の上端部内面に沿って延在する円環形状の外周縁部３２を有する。中央部３０には半径方向外方に向かって厚さが漸次低減する（従って、下面が半径方向外方に向かって上方に傾斜して延びる）円環形状の厚さ変動領域３４が存在し、この厚さ変動領域３４の外周縁は第二層２８の後述する厚肉外周縁部３８の内周面（従って後述する環状突出部４０の内周縁）に近接してその半径方向内側に位置することが重要である。厚さ変動領域３４の下面の水平に対する傾斜角度αは０．５乃至３．０度であるのが好適である。第一層２６の外周縁部３２の半径方向内側領域の肉厚は中央部３０の半径方向外側領域の肉厚よりも大きく、中央部３０と外周縁部３２との境界には好ましくは０．０５乃至０．４０ｍｍ程度である段差ｓが存在することが重要である。 The first layer 26 extends along a circular center portion 30 extending along the inner surface of the top wall 8 of the main body 4, the inner surface of the outer peripheral edge portion of the top wall 8 of the main body 4, and the inner surface of the upper end portion of the skirt wall 10. It has an annular outer peripheral edge portion 32 that fits. The central portion 30 has an annular thickness variation region 34 whose thickness gradually decreases radially outward (therefore, the lower surface extends radially outward at an upward inclination), The outer peripheral edge of the thickness variation region 34 is located radially inwardly of the inner peripheral surface of the thick outer peripheral edge portion 38 (described later) of the second layer 28 (therefore, the inner peripheral edge of the annular projecting portion 40 described later). is important . The inclination angle α of the lower surface of the thickness variation region 34 with respect to the horizontal is preferably 0.5 to 3.0 degrees . The thickness of the radially inner region of the outer peripheral edge 32 of the first layer 26 is greater than the thickness of the radially outer region of the central portion 30, and the boundary between the central portion 30 and the outer peripheral edge 32 preferably has a thickness of 0.05 mm. It is important that there is a step s which is on the order of 0.40 mm.

第一層２６の中央部３０に積層される第二層２８は、円形状の薄肉中央部３６と円環形状の厚肉外周縁部３８とを有する。外周縁部３８の半径方向内側領域には下方に突出する環状突出部４０が存在する。 The second layer 28 laminated on the central portion 30 of the first layer 26 has a circular thin central portion 36 and an annular thick peripheral edge portion 38 . In the radially inner region of the outer peripheral edge 38 there is a downwardly projecting annular projection 40 .

本発明に従って構成された容器蓋２においては、ライナー６を構成する第一層２６の外周縁部３２の半径方向内側領域の肉厚は中央部３０の半径方向外側領域の肉厚よりも大きく、中央部３０と外周縁部３２との境界には段差ｓが存在する、換言すれば第一層２６の外周縁部３２の半径方向内側領域の肉厚が比較的大きい故に、第二層２８を成形する際に型押部材が第一層２６の外周縁部３２の半径方向内側領域に作用するが、これによって第一層２６の外周縁部３２が破損されてしまうことが可及的に回避される。第一層２６の中央部３０の半径方向外側領域の肉厚は比較的小さく、従って第一層２６を成形するための合成樹脂材料量が過剰に増大してしまうことはない。更に、本発明に従って構成された容器蓋２においては、第一層２６の中央部３０には半径方向外方に向かって厚さが漸次低減する厚さ変動領域３４が存在する故に、第二層２８を型押成形する際に合成樹脂材料が充分円滑に半径方向外方に向けて流動し、所要形状の第二層２８を充分確実に成形することができる。 In the container lid 2 constructed in accordance with the present invention, the thickness of the radially inner region of the outer peripheral edge portion 32 of the first layer 26 constituting the liner 6 is greater than the thickness of the radially outer region of the central portion 30, A step s exists at the boundary between the central portion 30 and the outer peripheral edge portion 32. In other words, the thickness of the radially inner region of the outer peripheral edge portion 32 of the first layer 26 is relatively large. It is possible to avoid damage to the outer peripheral edge 32 of the first layer 26 caused by the embossing member acting on the radially inner region of the outer peripheral edge 32 of the first layer 26 during molding. be done. The thickness of the radially outer region of the central portion 30 of the first layer 26 is relatively small so that the amount of synthetic resin material for molding the first layer 26 is not excessively increased. Furthermore, in the container lid 2 constructed in accordance with the present invention, the central portion 30 of the first layer 26 has a thickness variation region 34 in which the thickness gradually decreases radially outward, so that the second layer When the second layer 28 is formed by stamping, the synthetic resin material flows sufficiently smoothly radially outward, so that the second layer 28 having the required shape can be formed with sufficient reliability.

図３及び図４には、容器蓋２が適用される容器の口頸部４２も図示されている。クロム酸処理鋼薄板、ブリキ薄板或いはアルミニウム基合金薄板の如き適宜の金属薄板から形成することができる、それ自体は周知の形態である容器の口頸部４２は、全体として略円筒形状であり、上方に向かって外径が漸次減少する上端部には外巻カール４４が形成されている。口頸部４２の主部外周面には雄螺条４６とかかる雄螺条４６の下方に位置する係止あご部４８とが形成されている。 Figures 3 and 4 also show a container neck 42 to which the container lid 2 is applied. The container neck 42, which is of a form known per se, which may be formed from any suitable sheet metal such as chromated steel sheet, tin sheet, or aluminum-based alloy sheet, is generally generally cylindrical in shape, An outer curl 44 is formed at the upper end where the outer diameter gradually decreases upward. A male thread 46 and a locking jaw 48 positioned below the male thread 46 are formed on the outer peripheral surface of the main portion of the mouth/neck portion 42 .

容器の口頸部４２に容器蓋２を装着して口頸部４２を密封する際には、口頸部４２に容器蓋２を被嵌して下方に押圧しライナー６の第二層２８を口頸部４２の頂部に密接せしめた状態、更に詳しくは第二層２８の環状突出部４０の外周面及び環状突出部４０よりも半径方向外側に位置する厚肉外周縁部３８の半径方向外側領域の下面を口頸部４０の外巻カール４４の内周面上端乃至上面に密接した状態、を維持しながら、本体２の天面壁８の外周縁部及びスカート壁１０の上端部を図３及び図４に図示するとおりの形状に変形する。かくすると、ライナー６の第二層２８の環状突出部４０の外周面が外巻カール４４の内周面上端部に密接されると共に環状突出部４０よりも半径方向外側に位置する厚肉外周縁部３８の半径方向外側領域の下面が外巻カール４４の上面乃至外周面に密接される。そして又、容器の口頸部４２に形成されている雄螺条４６に沿って本体２のスカート壁１０の主部１８を変形して雌螺条を形成し、本体２のスカート壁１０におけるタンパーエビデント裾部２０の下端部を半径方向内方に変形して容器の口頸部４２における係止あご部４８に係止する。 When the container lid 2 is attached to the mouth/neck portion 42 of the container and the mouth/neck portion 42 is sealed, the container lid 2 is fitted over the mouth/neck portion 42 and pressed downward to remove the second layer 28 of the liner 6. The state of being brought into close contact with the top of the mouth/neck portion 42, more specifically, the outer peripheral surface of the annular protrusion 40 of the second layer 28 and the radially outer side of the thick outer peripheral edge portion 38 located radially outside the annular protrusion 40. While maintaining the lower surface of the region in close contact with the upper end or upper surface of the inner peripheral surface of the outer curl 44 of the mouth and neck portion 40, the outer peripheral edge portion of the top wall 8 of the main body 2 and the upper end portion of the skirt wall 10 are moved. and deforms into the shape as shown in FIG. As a result, the outer peripheral surface of the annular protrusion 40 of the second layer 28 of the liner 6 is brought into close contact with the upper end of the inner peripheral surface of the outer curl 44, and the thick outer peripheral edge located radially outside the annular protrusion 40. The lower surface of the radially outer region of portion 38 is brought into intimate contact with the upper or outer peripheral surface of outer curl 44 . Further, the main portion 18 of the skirt wall 10 of the main body 2 is deformed along the male thread 46 formed in the mouth/neck portion 42 of the container to form the female thread, and the tampering in the skirt wall 10 of the main body 2 is performed. The lower end of evidence skirt 20 is deflected radially inward to engage locking jaws 48 on container neck 42 .

容器の内容物を消費するために口頸部４２を開封する際には、本体４のスカート壁８に指を掛けて容器蓋２を開方向、即ち図３において上方から見て反時計方向に回動する。かくすると、スカート壁１０の主部１８に形成されている雌螺条が口頸部４２の雄螺条４６に沿って移動する故に容器蓋２は口頸部４２に対して上方に移動される。他方、スカート壁１０のタンパーエビデント裾部２０はその下端部が口頸部４２の係止あご部４８に係止されている故に上方への移動が阻止され、スカート壁１０に形成されている周方向破断可能ライン１６における橋絡部２４に応力が生成されて橋絡部２４が破断される。しかる後においては、タンパーエビデント裾部２０を残して容器蓋２は回転と共に上方に移動して口頸部４２から離脱され、口頸部４２が開封される。
When opening the mouth/neck portion 42 to consume the contents of the container, put a finger on the skirt wall 8 of the main body 4 to open the container lid 2, that is, in the counterclockwise direction as viewed from above in FIG. Rotate. Thus, the female thread formed on the main portion 18 of the skirt wall 10 moves along the male thread 46 of the neck portion 42, so that the container lid 2 is moved upward with respect to the neck portion 42. . On the other hand, the tamper-evident bottom portion 20 of the skirt wall 10 is formed on the skirt wall 10 so that its lower end portion is locked by the locking jaw portion 48 of the mouth/neck portion 42 so that upward movement is prevented. A stress is generated in the bridge 24 at the circumferential breakable line 16 causing the bridge 24 to break. After that, the container lid 2 is rotated and moved upward leaving the tamper-evident bottom portion 20 to be separated from the mouth/neck portion 42, and the mouth/neck portion 42 is unsealed.

２：容器蓋
４：本体
６：ライナー
８：天面壁
１０：スカート壁
２６：第一層
２８：第二層
３０：第一層の中央部
３２：第一層の外周縁部
３４：厚さ変動領域
３６：第二層の薄肉中央部
３８：第二層の厚肉外周縁部
４０：環状突出部
４２：容器の口頸部 2: Container lid 4: Main body 6: Liner 8: Top wall 10: Skirt wall 26: First layer 28: Second layer 30: Central part of first layer 32: Peripheral edge part of first layer 34: Thickness variation Region 36: Thin center portion of second layer 38: Thick outer peripheral edge portion of second layer 40: Annular protruding portion 42: Mouth and neck portion of container

Claims (6)

円形状の天面壁及び該天面壁の周縁から垂下する円筒形状のスカート壁を有する金属薄板製本体と、該本体の該天面壁の内面に配設された合成樹脂製ライナーとを備え、
該本体における該天面壁と該スカート壁との境界領域は横断面において円弧形状であり、該スカート壁の上端部には周方向に連続して延びる環状凹部が形成されており、
該ライナーは該天面壁の内面に供給された硬質合成樹脂材料を型押成形することによって成形された第一層及び該第一層の下面に供給された軟質合成樹脂材料を型押成形することによって成形された第二層から構成されており、
該ライナーの該第一層は、該本体の該天面壁の内面に沿って延在する円形状の中央部と該本体の該天面壁の外周縁部内面及び該スカート壁の上端部内面に沿って延在し横断面において円弧形状である円環形状の外周縁部とを有し、
該ライナーの該第二層は、該第一層の該中央部に積層されており、円形状の薄肉中央部と円環形状の厚肉外周縁部とを有し、該厚肉外周縁部が容器の口頸部に密接される、
容器蓋において、
該ライナーの該第一層の該外周縁部の半径方向内側領域の肉厚は該中央部の半径方向外側領域の肉厚よりも大きく、該中央部と該外周縁部との境界には段差が存在し、
該第一層の該中央部には半径方向外方に向かって厚さが漸次低減する円環形状の厚さ変動領域が存在し、該厚さ変動領域の外周縁は該第二層の該厚肉外周縁部の内周縁に近接してその半径方向内側に位置する、
ことを特徴とする容器蓋。 A thin metal plate main body having a circular top wall and a cylindrical skirt wall hanging down from the peripheral edge of the top wall, and a synthetic resin liner disposed on the inner surface of the top wall of the main body,
A boundary region between the top wall and the skirt wall in the main body has an arcuate cross section, and an annular recess extending continuously in the circumferential direction is formed at the upper end of the skirt wall,
The liner is formed by embossing a first layer formed by embossing a hard synthetic resin material supplied to the inner surface of the top wall and a soft synthetic resin material supplied to the lower surface of the first layer. It consists of a second layer molded by
The first layer of the liner includes a circular central portion extending along the inner surface of the top wall of the main body, the inner surface of the outer peripheral edge portion of the top wall of the main body, and the inner surface of the upper end portion of the skirt wall. and an annular outer peripheral edge that extends through and is arcuate in cross section,
The second layer of the liner is laminated on the central portion of the first layer and has a circular thin central portion and an annular thick outer peripheral edge portion. is brought into close contact with the mouth and neck of the container,
In the container lid,
The thickness of the radially inner region of the outer peripheral edge of the first layer of the liner is greater than the thickness of the radially outer region of the central portion, and a step is provided at the boundary between the central portion and the outer peripheral edge of the liner. exists and
In the central portion of the first layer, there is an annular thickness variation region whose thickness gradually decreases radially outward, and the outer peripheral edge of the thickness variation region is the second layer. located radially inward of and adjacent to the inner peripheral edge of the thickened outer peripheral edge;
A container lid characterized by: 該段差は０．０５乃至０．４０ｍｍである、請求項１記載の容器蓋。 2. The container lid according to claim 1, wherein said step is 0.05 to 0.40 mm. 該第二層の該厚肉外周縁部の半径方向内側領域には下方に突出する環状突出部が存在する、請求項１又は２記載の容器蓋。 3. A container closure according to claim 1 or 2 , wherein a radially inner region of said thickened outer peripheral edge of said second layer has a downwardly projecting annular projection. 該第二層の該薄肉中央部における該厚さ変動領域に対向する領域では該厚さ変動領域の厚さ変動に応じて厚さが半径方向外方に向かって漸次増大する、請求項１から３までのいずれかに記載の容器蓋。 2. From claim 1 , wherein the thickness of a region facing the thickness variation region in the thin center portion of the second layer gradually increases radially outward in accordance with the thickness variation of the thickness variation region. 3. A container lid according to any one of 3 to 3 . 該厚さ変動領域は水平に対して０．５乃至３．０度の傾斜角度で傾斜する、請求項１から４までのいずれかに記載の容器蓋。 5. A container lid according to any one of claims 1 to 4 , wherein said thickness variation region is inclined at an inclination angle of 0.5 to 3.0 degrees with respect to the horizontal. 口頸部の先端には外巻カールが形成されている金属薄板製容器に適用され、該ライナーの該第二層の該環状突出部の外周面が該外巻カールの内周面上端部に密接されると共に該環状突出部よりも半径方向外側に位置する該厚肉外周縁部の半径方向外側領域の下面が該外巻カールの上面乃至外周面に密接される、請求項３記載の容器蓋。 Applied to a sheet metal container having an outer curl formed at the tip of the mouth and neck, and the outer peripheral surface of the annular protrusion of the second layer of the liner is at the upper end of the inner peripheral surface of the outer curl. 4. The container according to claim 3 , wherein the lower surface of the radially outer region of the thick-walled outer peripheral portion, which is in close contact and is located radially outwardly of the annular protrusion, is in close contact with the upper surface or outer peripheral surface of the outer curl. lid.
JP2017025771A 2017-02-15 2017-02-15 Container lid with metal body and synthetic resin liner Active JP7141812B2 (en)

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JP2017025771A JP7141812B2 (en) 2017-02-15 2017-02-15 Container lid with metal body and synthetic resin liner
US16/485,004 US20190359398A1 (en) 2017-02-15 2018-02-01 Container lid comprising metal body and synthetic resin liner
EP18755003.3A EP3584192B1 (en) 2017-02-15 2018-02-01 Container lid provided with metal body and synthetic resin liner
PCT/JP2018/003432 WO2018150896A1 (en) 2017-02-15 2018-02-01 Container lid provided with metal body and synthetic resin liner
KR1020197019643A KR102592793B1 (en) 2017-02-15 2018-02-01 Container lid with a metal body and synthetic resin liner
CN201880006359.6A CN110167848B (en) 2017-02-15 2018-02-01 Container lid comprising metal body and synthetic resin liner
JP2021082410A JP7506027B2 (en) 2017-02-15 2021-05-14 A container lid with a metal body and a synthetic resin liner

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JPWO2021060252A1 (en) * 2019-09-25 2021-04-01
US11794450B2 (en) * 2020-12-18 2023-10-24 Altria Client Services Llc Polymer-laminated metal lid
KR102443711B1 (en) * 2022-02-07 2022-09-16 세왕금속공업(주) Seal liner removable bottle cap

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EP3584192A1 (en) 2019-12-25
JP2018131234A (en) 2018-08-23
US20190359398A1 (en) 2019-11-28
KR20190118550A (en) 2019-10-18
EP3584192A4 (en) 2021-02-24
EP3584192B1 (en) 2022-03-30
JP2021120301A (en) 2021-08-19
KR102592793B1 (en) 2023-10-20
CN110167848B (en) 2022-02-15
CN110167848A (en) 2019-08-23
JP7506027B2 (en) 2024-06-25
WO2018150896A1 (en) 2018-08-23

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