JP2018131234A - Container lid with body made of metal and liner made of synthetic resin - Google Patents

Container lid with body made of metal and liner made of synthetic resin Download PDF

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Publication number
JP2018131234A
JP2018131234A JP2017025771A JP2017025771A JP2018131234A JP 2018131234 A JP2018131234 A JP 2018131234A JP 2017025771 A JP2017025771 A JP 2017025771A JP 2017025771 A JP2017025771 A JP 2017025771A JP 2018131234 A JP2018131234 A JP 2018131234A
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layer
outer peripheral
peripheral edge
region
container lid
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JP7141812B2 (en
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俊平 下地
Shumpei Shimoji
俊平 下地
英典 近藤
Hidenori Kondo
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 JP2017025771A priority Critical patent/JP7141812B2/en
Application filed by Nippon Closures Co Ltd filed Critical Nippon Closures Co Ltd
Priority to KR1020197019643A priority patent/KR102592793B1/en
Priority to EP18755003.3A priority patent/EP3584192B1/en
Priority to CN201880006359.6A priority patent/CN110167848B/en
Priority to US16/485,004 priority patent/US20190359398A1/en
Priority to PCT/JP2018/003432 priority patent/WO2018150896A1/en
Publication of JP2018131234A publication Critical patent/JP2018131234A/en
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)

Abstract

PROBLEM TO BE SOLVED: To improve a container lid comprising a body which is made of thin metal plate and has a top surface wall and a skirt wall hanging down from the circumference of the top surface wall, and a liner which is made of synthetic resin, provided on the inside surface of the top surface wall of the body and is constituted by a first layer (26) formed on the inside surface of the top surface wall and a second layer (28) formed on the under surface of the first layer, such that the second layer can be reliably press molded into a required shape while preventing as much as possible the damages of the radially inner area of an outer peripheral edge part of the first layer during press molding the second layer without causing individual problems such as significant increase of material quantity used.SOLUTION: The thickness of the radially inner area of an outer peripheral edge part (32) of a first layer is made greater than the thickness of the radially outer area of a center part (30) so that a step is formed at the border between the central part and the outer peripheral edge part. Additionally, in the center part of the first layer, a circular thickness changing area (34) is formed in which the thickness decreases gradually radially outwardly.SELECTED DRAWING: Figure 2

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 relates to a container comprising a metal sheet main body having a circular top wall and a cylindrical skirt wall hanging 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. An outer curl is formed on the upper end of the cylindrical mouth and neck, and a female thread and a locking jaw located below the outer periphery of the mouth and neck. As a container lid particularly suitable for a container generally referred to as a bottle can, Patent Documents 1 and 2 listed below include a circular top wall and a cylindrical skirt wall depending from the periphery of the top wall. And a container lid provided with a synthetic resin liner disposed on the inner surface of the top wall of the main body. An annular recess is formed at the upper end of the skirt wall of the main body. The liner is molded by stamping the first layer formed by stamping the hard synthetic resin material supplied to the inner surface of the top wall and the soft synthetic resin material supplied to the bottom surface of the first layer. And the second layer. The first layer of the liner has a circular central portion extending along the inner surface of the top wall of the main body, an outer peripheral edge portion of the top wall of the main body, and an annular outer portion extending along the upper end portion of the skirt wall. The second layer of the liner is laminated at the center of the first layer.

特開２０１５−３３２５公報JP, 2015-3325, A 特開２０１６−２６９６１公報JP 2006-26961 A

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。   Thus, according to the experience of the present inventors, the conventional container lid of the above-described form includes (1) a radially inner region in the outer peripheral edge of the first layer when the second layer is embossed. That is, there is a high possibility that the portion adjacent to the central portion in the outer peripheral edge portion is damaged. (2) When the second layer is stamped, the synthetic resin for forming the second layer is sufficiently smooth. It has been found that there is a problem to be solved that does not flow as required and that the second layer of the required shape may not be stamped.

本発明は、上記事実に鑑みてなされたものであり、その第一の課題は、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た、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-mentioned facts, and the first problem is that the second layer is embossed without causing separate problems such as a considerable increase in the amount of materials used. It is an object of the present invention to provide a new and improved container lid that avoids as much as possible damage to the radially inner region of the outer peripheral edge of the first layer.

本発明の第二の課題は、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 second object of the present invention is to provide a new and improved container lid capable of reliably embossing a second layer having a required shape.

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）。   As a result of diligent research and incidents, the inventors of the present invention have found that when the second layer is stamped, the radially inner region of the outer peripheral edge of the first layer is usually damaged in the adjacent central portion. The thickness of the radially inner region of the outer peripheral edge, which is the same as the thickness of the radially outer region, is too small, and the mold part for stamping the second layer abuts with a considerable pressing force. It was recognized that it was caused by not having sufficient resistance. 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, and there is 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 making it exist (the thickness of the radially outer region in the central part is also increased in the same manner, and the first problem is solved even if a step does not exist) But this increases the amount of material required to mold the first layer).

また、本発明者等は、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。   Further, as a result of intensive studies and experiments, the present inventors have found that an annular thickness variation region in which the thickness gradually decreases outward in the radial direction at the center of the first layer is the second layer. It has been found that the synthetic resin material for forming the second layer can flow sufficiently smoothly when the layer is embossed.

即ち、本発明によれば、上記第一の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す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いる、
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 that achieves the first problem, a sheet metal main body having a circular top wall and a cylindrical skirt wall depending from the periphery of the top wall, A synthetic resin liner disposed on the inner surface of the top 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. Composed 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, an inner surface of the outer peripheral edge of the top wall of the main body, and an inner surface of the upper end portion of the skirt wall. A ring-shaped outer peripheral edge that extends,
The second layer of the liner is laminated to the central portion of the first layer;
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 there is a step at the boundary between the central portion and the outer peripheral edge. Exists,
A container lid is provided.

また、本発明によれば、上記第二の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す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いる、
容器蓋において、
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する、
ことを特徴とする容器蓋が提供される。 Further, according to the present invention, as a container lid for achieving the second problem, a metal thin plate main body having a circular top wall and a cylindrical skirt wall depending from the periphery of the top wall, A synthetic resin liner disposed on the inner surface of the top 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. Composed 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, an inner surface of the outer peripheral edge of the top wall of the main body, and an inner surface of the upper end portion of the skirt wall. A ring-shaped outer peripheral edge that extends,
The second layer of the liner is laminated to the central portion of the first layer;
In the container lid,
In the central portion of the first layer, there is an annular thickness variation region in which the thickness gradually decreases outward in the radial direction.
A container lid is provided.

該段差は０．０５乃至０．４０ｍｍであるのが好適である。好ましくは、該第二層は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し、該第一層の厚さ変動領域の外周縁は該環状突出部の内周縁よりも半径方向内側に位置する。該第一層の該厚さ変動領域は該第二層の該薄肉中央部の半径方向外側領域に対向して位置し、該第二層の該薄肉中央部の該半径方向外側領域では該第一層の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. Preferably, the second layer has a circular thin central portion and an annular thick outer peripheral edge, and an annular protruding portion protruding downward is formed in a radially inner region of the thick outer peripheral edge. The outer peripheral edge of the thickness variation region of the first layer is located radially inward from the inner peripheral edge of the annular protrusion. The thickness variation region of the first layer is located opposite to the radially outer region of the thin central portion of the second layer, and the first layer has the first region in the radially outer region of the thin central portion of the second layer. Conveniently, the thickness gradually increases radially outward in response to the thickness variation of the thickness variation region of one layer. The thickness variation region is preferably inclined at an inclination angle of 0.5 to 3.0 degrees with respect to the horizontal. It is applied to a container made of sheet metal with 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 Conveniently, the lower surface of the radially outer region of the thick outer peripheral edge that is in close contact and located radially outward from the annular protrusion is in close contact with the upper surface or outer peripheral surface of the outer 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 refer to the upper and lower sides of the container lid in the upright state (ie, the state shown in FIGS. 1 to 3).

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する、本発明の容器蓋においては、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。   The thickness of the radially inner region of the outer peripheral edge of the first layer of the liner is larger than the thickness of the radially outer region of the central portion, and there is a step at the boundary between the central portion and the outer peripheral portion. In the case of the container lid, the thickness of the radially inner region of the outer peripheral edge of the first layer of the liner can be made sufficiently thick without excessively increasing the amount of material required for molding the first layer. When the second layer is stamped, it is possible to avoid as much as possible that the radially inner region in the outer peripheral edge of the first layer is damaged.

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する、本発明の容器蓋においては、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。   Further, in the central portion of the first layer, there is an annular thickness variation region in which the thickness gradually decreases outward in the radial direction.In the container lid of the present invention, due to the presence of the thickness variation region. When the second layer is embossed, the flow of the material is promoted, and the second layer of the required shape can be embossed reliably.

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。The front view which shows a part in cross section of suitable embodiment of the container lid comprised according to this invention. 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。The front view which shows a part in the state of mounting | wearing the mouth-and-neck part of the container made from a thin plate with the container lid shown in FIG. 1 and sealing the mouth-and-neck part. 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。   Hereinafter, a preferred embodiment of a container lid constructed according to the present invention will be described in more detail with reference to the accompanying drawings.

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 by numeral 2, constructed according to the present invention includes a metal thin plate body 4 and a synthetic resin liner 6.

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よりも上方に主部１８と周方向破断可能ライン１６よりも下方に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 main body 4, which can be formed from an appropriate metal thin plate such as an aluminum-based alloy thin plate, has a circular top wall 8 and a cylindrical skirt wall 10 depending from the periphery of the top wall 8. The boundary region between the top wall 8 and the skirt wall 10 has an arc shape in the cross section. An annular recess 12 extending continuously in the circumferential direction is formed at the upper end of the skirt wall 10. In the region immediately below the annular recess 12, a plurality of slits (cuts) 14 extending in the circumferential direction are formed at intervals in the circumferential direction, and the region located below the slit 14 is in the radial direction. It is displaced towards. A circumferentially breakable line 16 is disposed at the lower end portion of the skirt wall 10, and the skirt wall 10 is located above the circumferentially breakable line 16 and below the main portion 18 and the circumferentially breakable line 16. It is partitioned into an evidence skirt 20. The circumferentially breakable line 16 in the illustrated embodiment includes a plurality of slits 22 extending in the circumferential direction at intervals in the circumferential direction and a plurality of bridge portions 24 left between the slits 22. The tamper evidence skirt portion 20 is connected to the main portion 18 via a plurality of bridging portions 24. Such a main body 4 itself is a well-known form, and therefore a detailed description of the main body 4 is omitted in this specification.

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 the description with reference to FIG. 2 together with FIG. 1, the liner 6 includes a first layer 26 and a second layer 28. The first layer 26 is formed by stamping 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 inverted and held on a base (not shown), and a soft and molten synthetic resin material is supplied to the central portion of the top wall 8, and the synthetic resin material has a required shape. Molding is performed by pressing a stamping member (not shown) with a required pressure. It is important that the first layer 26 is molded from a hard synthetic resin having excellent gas barrier properties such as polyethylene or polypropylene. However, 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 lower surface of the first layer 26. More specifically, the main body 2 on which the first layer 26 is molded is inverted and held on a base (not shown), and a soft and molten synthetic resin material is supplied to the center of the first layer 26. The synthetic resin material is molded by pressing a stamping 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 having excellent sealing properties such as polyethylene or elastomer.

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が存在することが重要である（この厚さ変動領域３４の外周縁は第二層２８の後述する環状突出部４０に近接してその半径方向内側に位置するのが好ましい）。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０．０５乃至０．４０ｍｍ程度であるのが好適である段差ｓが存在する。   The first layer 26 extends along the inner surface 30 of the circular shape extending along the inner surface of the top wall 8 of the main body 4, the inner surface of the outer peripheral edge of the top wall 8 of the main body 4, and the inner surface of the upper end of the skirt wall 10. The outer peripheral edge portion 32 has an annular shape. The central portion 30 has an annular thickness variation region 34 in which the thickness gradually decreases outward in the radial direction (therefore, the lower surface extends obliquely upward in the radial outward direction). (It is preferable that the outer peripheral edge of the thickness variation region 34 is located in the radial direction in the vicinity of the annular protrusion 40 described later of the second layer 28). The inclination angle α with respect to the horizontal of the lower surface of the thickness variation region 34 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 larger than the thickness of the radially outer region of the central part 30, and 0.05 to 0.05 is provided at the boundary between the central part 30 and the outer peripheral edge 32. There is a step s that is preferably about 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 outer peripheral edge 38. An annular protrusion 40 that protrudes downward is present in the radially inner region of the outer peripheral edge 38.

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 configured according to the present invention, the thickness of the radially inner region of the outer peripheral edge 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. When the molding is performed, the embossing member acts on the radially inner region of the outer peripheral edge portion 32 of the first layer 26, but it is avoided as much as possible that the outer peripheral edge portion 32 of the first layer 26 is damaged by this. Is 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 the synthetic resin material for forming the first layer 26 does not increase excessively. Furthermore, in the container lid 2 configured according to the present invention, the thickness variation region 34 in which the thickness gradually decreases outward in the radial direction is present in the central portion 30 of the first layer 26. When embossing 28, the synthetic resin material flows sufficiently smoothly outward in the radial direction, so that the second layer 28 having a required shape can be sufficiently reliably molded.

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。   3 and 4 also illustrate the mouth and neck portion 42 of the container to which the container lid 2 is applied. It can be formed from an appropriate metal thin plate such as a chromate-treated steel thin plate, a tin thin plate, or an aluminum-based alloy thin plate. The mouth-and-neck portion 42 of the container, which is a well-known form, has a substantially cylindrical shape as a whole. 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 part 48 positioned below the male thread 46 are formed on the outer peripheral surface of the main part of the mouth and neck part 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-and-neck portion 42 of the container and the mouth-and-neck portion 42 is sealed, the container lid 2 is fitted on the mouth-and-neck portion 42 and pressed downward so that the second layer 28 of the liner 6 is attached. In a state of being in 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 38 positioned radially outward from the annular protrusion 40. FIG. 3 shows the outer peripheral edge of the top wall 8 of the main body 2 and the upper end of the skirt wall 10 while maintaining the state where the lower surface of the region is in close contact with the inner circumferential upper end or upper surface of the outer curl 44 of the mouth / neck 40. And it deform | transforms into the shape as shown in FIG. Thus, the outer peripheral surface of the annular protrusion 40 of the second layer 28 of the liner 6 is in close contact with the upper end of the inner peripheral surface of the outer curl 44 and is located on the radially outer side of the annular protrusion 40. The lower surface of the radially outer region of the portion 38 is in close contact with the upper surface or outer peripheral surface of the outer curl 44. The main portion 18 of the skirt wall 10 of the main body 2 is deformed along the male screw 46 formed in the mouth-and-neck portion 42 of the container to form a female thread, and the tamper in the skirt wall 10 of the main body 2 is formed. The bottom end of the evidence skirt 20 is deformed radially inward to be engaged with the locking jaw 48 in the mouth / neck portion 42 of the container.

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に形成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-and-neck portion 42 to consume the contents of the container, the container lid 2 is opened in the opening direction by placing a finger on the skirt wall 8 of the main body 4, that is, counterclockwise as viewed from above in FIG. Rotate. Thus, the female thread formed in the main portion 18 of the skirt wall 10 moves along the male thread 46 of the mouth-and-neck part 42, so that the container lid 2 is moved upward with respect to the mouth-and-neck part 42. . On the other hand, since the lower end portion of the tamper-evidence skirt portion 20 of the skirt wall 10 is formed in the locking jaw portion 48 of the mouth-and-neck portion 42, the upward movement is prevented, and the skirt wall 10 has a peripheral portion formed in the skirt wall 10. Stress is generated in the bridging portion 24 in the direction breakable line 16 and the bridging portion 24 is broken. Thereafter, the container lid 2 moves upward with rotation while leaving the tamper evidence skirt 20 and is detached from the mouth and neck portion 42, and the mouth and neck portion 42 is opened.

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: Center portion of first layer 32: Outer peripheral edge portion of first layer 34: Variation in thickness Area 36: Thin center portion of the second layer 38: Thick outer peripheral portion of the second layer 40: Annular protrusion 42: Mouth and neck portion of the container

Claims (12)

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す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いる、
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する、
ことを特徴とする容器蓋。 A metal thin plate main body having a circular top wall and a cylindrical skirt wall depending 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,
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. Composed 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, an inner surface of the outer peripheral edge of the top wall of the main body, and an inner surface of the upper end portion of the skirt wall. A ring-shaped outer peripheral edge that extends,
The second layer of the liner is laminated to the central portion of the first layer;
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 there is a step at the boundary between the central portion and the outer peripheral edge. Exists,
A container lid characterized by that. 該段差は０．０５乃至０．４０ｍｍである、請求項１記載の容器蓋。   The container lid according to claim 1, wherein the step is 0.05 to 0.40 mm. 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する、請求項１又は２記載の容器蓋。   3. The container lid according to claim 1, wherein an annular shape variation region in which the thickness gradually decreases outward in the radial direction is present in the central portion of the first layer. 該第二層は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し、該第一層の該厚さ変動領域の外周縁は該環状突出部の内周縁よりも半径方向内側に位置する、請求項３記載の容器蓋。   The second layer has a circular thin-walled central portion and an annular thick outer peripheral edge, and there is an annular protrusion protruding downward in a radially inner region of the thick outer peripheral edge, The container lid according to claim 3, wherein an outer peripheral edge of the thickness variation region of the first layer is located radially inward from an inner peripheral edge of the annular protrusion. 該第一層の該厚さ変動領域は該第二層の該薄肉中央部の半径方向外側領域に対向して位置し、該第二層の該薄肉中央部の該半径方向外側領域では該第一層の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４記載の容器蓋。   The thickness variation region of the first layer is located opposite to the radially outer region of the thin central portion of the second layer, and the first layer has the first region in the radially outer region of the thin central portion of the second layer. The container lid according to claim 4, wherein the thickness gradually increases outward in the radial direction in response to a thickness variation of the thickness variation region of one layer. 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３から５までのいずれかに記載の容器蓋。   The container lid according to any one of claims 3 to 5, wherein the 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４から６までのいずれかに記載の容器蓋。   It is applied to a container made of sheet metal with 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 The lower surface of the radially outer region of the thick outer peripheral edge that is in close contact with and positioned radially outward from the annular protrusion is in close contact with the upper surface or outer peripheral surface of the outer curl. The container lid according to any one of the above. 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す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いる、
容器蓋において、
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する、
ことを特徴とする容器蓋。 A metal thin plate main body having a circular top wall and a cylindrical skirt wall depending 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,
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. Composed 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, an inner surface of the outer peripheral edge of the top wall of the main body, and an inner surface of the upper end portion of the skirt wall. A ring-shaped outer peripheral edge that extends,
The second layer of the liner is laminated to the central portion of the first layer;
In the container lid,
In the central portion of the first layer, there is an annular thickness variation region in which the thickness gradually decreases outward in the radial direction.
A container lid characterized by that. 該第二層は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し、該第一層の該厚さ変動領域の外周縁は該環状突出部の内周縁よりも半径方向内側に位置する、請求項８記載の容器蓋。   The second layer has a circular thin-walled central portion and an annular thick outer peripheral edge, and there is an annular protrusion protruding downward in a radially inner region of the thick outer peripheral edge, The container lid according to claim 8, wherein an outer peripheral edge of the thickness variation region of the first layer is located radially inward from an inner peripheral edge of the annular protrusion. 該第一層の該厚さ変動領域は該第二層の該薄肉中央部の半径方向外側領域に対向して位置し、該第二層の該薄肉中央部の該半径方向外側領域では該第一層の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９記載の容器蓋。   The thickness variation region of the first layer is located opposite to the radially outer region of the thin central portion of the second layer, and the first layer has the first region in the radially outer region of the thin central portion of the second layer. The container lid according to claim 9, wherein the thickness gradually increases outward in the radial direction in response to a thickness variation of the thickness variation region of one layer. 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８から１０までのいずれかに記載の容器蓋。   The container lid according to any one of claims 8 to 10, wherein the 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８から１１までのいずれかに記載の容器蓋。   It is applied to a container made of sheet metal with 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 The bottom surface of the radially outer region of the thick outer peripheral edge that is in close contact and located radially outward from the annular protrusion is in close contact with the upper surface or outer peripheral surface of the outer curl. The container lid according to any one of the above.
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CN201880006359.6A CN110167848B (en) 2017-02-15 2018-02-01 Container lid comprising 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
KR1020197019643A KR102592793B1 (en) 2017-02-15 2018-02-01 Container lid with a 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
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