JP4745508B2 - Container lid with reinforced top wall and manufacturing method thereof - Google Patents

Container lid with reinforced top wall and manufacturing method thereof Download PDF

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Publication number
JP4745508B2
JP4745508B2 JP2001025483A JP2001025483A JP4745508B2 JP 4745508 B2 JP4745508 B2 JP 4745508B2 JP 2001025483 A JP2001025483 A JP 2001025483A JP 2001025483 A JP2001025483 A JP 2001025483A JP 4745508 B2 JP4745508 B2 JP 4745508B2
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Japan
Prior art keywords
top wall
reinforcing member
synthetic resin
wall
container lid
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JP2001025483A
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JP2002225898A (en
Inventor
誠司 福士
浩 佐藤
光雄 熊田
英彦 近江
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Nippon Closures Co Ltd
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Nippon Closures Co Ltd
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Description

【発明の属する技術分野】
【0001】
本発明は、円形天面壁及びこの天面壁の周縁から垂下する円筒形スカート壁を有する本体の天面壁が補強された容器蓋及びその製造方法に関する。
【0002】
【従来の技術】
ポリエチレンテレフタレートの如き合成樹脂或いはガラスから形成された飲料用容器の口頸部に装着される容器蓋として、円形天面壁及びこの天面壁の周縁から垂下する円筒形スカート壁を具備する、アルミニウム基合金薄板、クロム酸処理鋼薄板或いはブリキ薄板の如き金属薄板から形成された本体を具備する容器蓋が、広く使用されている。本体の天面壁の内面には軟質ポリエチレンの如き合成樹脂製ライナーが配設されている。本体のスカート壁には周方向に延びる破断ラインが形成されており、スカート壁は破断ラインよりも上方の主部と破断ラインよりも下方のタンパーエビデント裾部に区画されている。タンパーエビデント裾部には、通常、軸線方向に延びる破断ラインが形成されている。容器の口頸部は上面が開放された円筒形状であり、その外周面には雄螺条とこの雄螺条の下方に位置する環状あご部が形成されている。本体が金属薄板から形成されている場合、容器に内容物を充填した後に、口頸部に容器蓋を被嵌し、ライナーを口頸部に押圧せしめて口頸部を密封した状態で、口頸部の雄螺条に沿ってスカート壁の主部に雌螺条を形成すると共にスカート壁の下端部を半径方向内側に変形せしめて環状あご部に係止せしめ、かくして口頸部に容器蓋を装着し、口頸部を密封する。
【0003】
【発明が解決しようとする課題】
而して、従来の容器蓋には、天面壁の強度が必ずしも充分ではなく、例えば天面壁に異物が衝突した時に天面壁が破損乃至変形されて密封が毀損される虞があり、或いは容器内の圧力が上昇した時に天面壁がドーム状に膨出する所謂ドーミング現象が発生して密封が毀損される虞がある、という解決すべき問題がある。
【0004】
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、円形天面壁及びこの天面壁の周縁から垂下する円筒形スカート壁を有する本体を具備する容器蓋に改良を加えて、天面壁の強度を充分なものにせしめること、そしてまた天面壁の強度を充分なものにせしめた容器蓋を効率的に製造することを可能にする製造方法を提供することである。
【0005】
【課題を解決するための手段】
本発明の一局面によれば、天面壁の強度が充分なものにせしめられた容器蓋として、円形天面壁及び該天面壁の周縁から垂下する円筒形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金属薄板製補強部材と、合成樹脂製ライナーとを具備し、該本体の該天面壁はその中央部が上方に***せしめられていて、該天面壁の内面には円形凹部が規定されており、該補強部材は円板形状であって該円形凹部内に位置せしめられており、該ライナ−は該補強部材の下面と該天面壁の内面とに跨って型押成形されていて、該補強部材の下面と共に該天面壁の内面に接着されている、ことを特徴とする容器蓋が提供される。
【0006】
本発明の他の局面によれば、天面壁の強度が充分なものにせしめられた容器蓋を効率的に製造することを可能にする製造方法として、円形天面壁及び該天面壁の周縁から垂下する円筒形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金属薄板製補強部材と、合成樹脂製ライナーとを具備し、該補強部材は該本体の該天面壁の外径よりも小さい外径を有する円板形状であり、該天面壁の内面に同心状に積層せしめられており、該合成樹脂製ライナーは該補強部材の下面と該天面壁の内面とに跨がって型押成形されていて、該補強部材の下面と共に該天面壁の内面に接着されている容器蓋の製造方法にして、
上面に熱接着性合成樹脂コーティングを施した該補強部材を該天面壁の内面に同心状に位置せしめ、次いで該熱接着性合成樹脂コーティングを加熱することによって該補強部材を該天面壁の内面に仮接着せしめ、しかる後に該補強部材の下面上に合成樹脂素材を供給し、該合成樹脂素材を型押成形して該合成樹脂製ライナーを成形する、ことを特徴とする製造方法が提供される。
【0007】
【発明の実施の形態】
以下、添付図面を参照して、本発明好適実施形態について、更に詳細に説明する。
【0008】
図1を参照して説明すると、全体を番号2で示す図示の容器蓋は、本体4、補強部材6及び合成樹脂製ライナー8から構成されている。アルミニウム基合金薄板、クロム酸処理鋼薄板或いはブリキ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、円形天面壁10とこの天面壁10の周縁から垂下する円筒形スカート壁12と有する。スカート壁12の下部には半径方向外方に幾分膨出せしめられた環状膨出部14が配設されている。環状膨出部14には周方向に延出する破断ライン16が形成されており、スカート壁12は破断ライン16よりも上方の主部18と破断ライン16よりも下方のタンパーエビデント裾部20とに区画されている。破断ライン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間に位置する複数個の橋絡部24とから構成されている。複数個の橋絡部24の内の1個は、他の橋絡部24に比べて周方向幅が大きい広幅橋絡部24Aにせしめられている。スカート壁12の主部18の外周面の上部には、周方向に延びる環状溝部26が形成されている。また、スカート壁12の主部18の外周面の上部には、環状溝部26より上方に周方向に延びる環状凹凸形状部28も形成されている。スカート壁12のタンパーエビデント裾部20には、上記広幅橋絡部24Aの片端からタンパーエビデント裾部20の下端まで下方に延びる軸線方向破断ライン30が形成されている。かかる軸線方向破断ライン30は、材料厚さを低減せしめることによって形成される所謂スコアでよい。
【0009】
図1を参照して説明を続けると、補強部材6もアルミニウム基合金薄板、クロム酸処理鋼薄板或いはブリキ薄板の如き適宜の金属薄板から形成されている。補強部材6は本体4の天面壁10の外径よりも小さい外径を有する円板形状であり、天面壁10の内面に同心状に積層せしめられている。後に更に言及する如く、補強部材6の上面には熱接着性合成樹脂コーティングが施されている。
【0010】
合成樹脂製ライナー8は補強部材6の下面と天面壁10の内面とに跨って型押成形されていて、補強部材6の下面と共に天面壁10の内面に接着されており、これによって補強部材6が所要位置、即ち天面壁10の内面に積層された位置に保持されている。軟質ポリエチレンの如き適宜の合成樹脂素材から好都合に形成することができる合成樹脂ライナー8は全体として円板形状であり、薄肉中央部32と周縁部に形成されている2条の同心状密封突条34及び36を有する。
【0011】
図2は、上述したとおりの容器蓋2を効率的に製造するための製造工程の一例を簡略に図示している。最初に、図2−Aに図示する如く、片面(図2−Aにおいて下面)に熱接着性樹脂コーティングを施した金属薄板を打ち抜きにて円板形状の補強部材6を形成する。次いで、別個に形成した本体4を上下が逆にせしめられた反転状態にせしめ、図2−Bに図示する如く、熱接着性樹脂コーティングが施された、補強部材6の片面(図1に示す状態においては上面)を本体4の天面壁10の内面に対向せしめて、天面壁10の内面に補強部材6を同心状に積層せしめる。そして、熱接着性樹脂コーティングが施された、補強部材6の片面(図1に示す状態においては上面)と天面壁10の内面とを密接せしめた状態で、高周波加熱でよい加熱手段(図示していない)によって熱接着性樹脂コーティングを加熱せしめ、補強部材6を天面壁10の内面に仮接着せしめる。これによって、天面壁10の内面に同心状に位置せしめられている補強部材6が偶発的に変位せしめられることが防止される。その後、図2−Cに図示する如く、補強部材6の、他の片面(図1に示す状態においては下面)上に軟化溶融状態の合成樹脂素材38を供給する。そして、かかる合成樹脂素材38に所要形状の型押工具(図示していない)を作用せしめて、図2−Dに図示する如く、補強部材6の、他の片面(図1に図示する状態においては下面)及び天面壁10の内面に跨る合成樹脂製ライナー8を形成する。
【0012】
図3は、容器の口頸部40に容器蓋2を所要とおりに装着して口頸部40を密封した状態を図示している。ポリエチレンテレフタレートの如き適宜の合成樹脂或いはガラスから形成することができる容器の口頸部40は略円筒形状であり、その外周面には雄螺条42とこの雄螺条42の下方に位置する環状あご部44が形成されている。口頸部40に容器蓋2を装着して口頸部40を密封する際には、口頸部40に容器蓋2を被嵌し、本体4の天面壁10の外面に押圧力を加えて合成樹脂製ライナー8の密封突条34及び36を口頸部40の上端部に密接せしめる。次いで、口頸部40の雄螺条42に沿って本体4のスカート壁12における主部18に、更に詳しくは環状溝部26よりも下方の領域に、雌螺条46を形成する。加えて、タンパーエビデント裾部20の下端部を半径方向内側に折曲せしめて、口頸部40の環状あご部44に係止せしめる。
【0013】
図示の容器蓋2においては、本体2の天面壁10の内面に補強部材6が積層せしめられており、補強部材6によって本体4の天面壁10が効果的に補強されている。それ故に、例えば天面壁10の外面に異物が衝突したとしても天面壁10が破損乃至変形される虞は充分に少ない。また、容器内の圧力が上昇せしめられても、本体4の天面壁10がドーム状に膨出するドーミング現象が発生することが充分に抑制されている。
【0014】
容器の口頸部40を開封するためには、本体4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転せしめる。かくすると、雄螺条42と雌螺条46との協働により本体2は回転と共に上昇せしめられる。しかしながら、タンパーエビデント裾部20はその下端部が環状あご部44に係止せしめられている故に自由に上昇することができず、周方向に延在する破断ライン16及び軸線方向に延びる破断ライン30に相当大きな応力が生成される。かくして、破断ライン16がその広幅橋絡部24Aを残して破断されると共に破断ライン30が破断され、タンパーエビデント裾部20は無端環状から有端帯状に開かれる。しかる後においては、本体4のタンパーエビデント裾部20も回転と共に自由に上昇することが許容され、本体4、補強部材6及び合成樹脂製ライナー8を含む容器蓋2の全体が口頸部40から離脱され、口頸部40が開封される。
【0015】
図4は、本発明に従って構成された容器蓋の実施形態を図示している。図4に図示する実施形態においては、本体104の天面壁110は、その中央部が円板状に上方に***せしめられており、天面壁110の内面の中央部には、円板状の補強部材106と略同一の寸法を有する円形凹部107が同心状に規定されている。そして、補強部材106は円形凹部107内に同心状に位置せしめられている。
【0016】
かかる容器蓋102を製造するための製造工程の一例としては、最初に、金属薄板(この変形例の場合は金属薄板の片面に熱接着性樹脂コーティングを施すことを省略することができる)に打ち抜きにて円板形状の補強部材106を形成する。次いで、図5に図示する如く、図4に図示する形態に別個に形成した本体104を上下が逆にせしめられた反転状態にせしめ、補強部材106を天面壁110の円形凹部107内に載置する。かくすると、補強部材106が円形凹部107内に拘束され、天面壁110の内面に同心状に位置せしめられている補強部材106が偶発的に変位せしめられることが防止される。その後、補強部材106の片面(図4に図示する状態では下面)上に軟化溶融状態の合成樹脂素材を供給し、所要形状の型押工具を作用せしめて、補強部材106の片面(図4に図示する状態では下面)及び天面壁110の内面に跨る合成樹脂製ライナー108を形成する。
【0017】
添付図面を参照して本発明の容器蓋の好適実施形態について詳細に説明したが、本発明はかかる実施形態に限定されるものではなく、本発明の範囲から逸脱することなく種々の変形乃至修正が可能である
【0018】
【発明の効果】
本発明の容器蓋によれば、本体の天面壁が補強部材によって充分な強度に補強される。また、本発明の製造方法によれば、天面壁が補強された容器蓋を効率的に製造することができる。
【図面の簡単な説明】
【図1】 天面壁が補強された容器蓋の一例を、一部を断面で示す正面図。
【図2】 図1の容器蓋の製造工程の一例を示す簡略図。
【図3】 図1の容器蓋を容器の口頸部に装着した状態を、一部を断面で示す正面図。
【図4】 本発明に従って構成された容器蓋の実施形態の一部を拡大して示す部分拡大断面図。
【図5】 本発明に従って構成された容器蓋の実施形態の製造工程の一例の一部を示す簡略図。
【符号の説明】
2:容器蓋
4:本体
6:補強部材
8:合成樹脂製ライナー
10:天面壁
12:スカート壁
102:容器蓋
104:本体
106:補強部材
107:円形凹部
108:合成樹脂製ライナー
110:天面壁
BACKGROUND OF THE INVENTION
[0001]
The present invention relates to a container lid in which a top wall of a main body having a circular top wall and a cylindrical skirt wall depending from a peripheral edge of the top wall is reinforced, and a method for manufacturing the same .
[0002]
[Prior art]
Aluminum-based alloy comprising a circular top wall and a cylindrical skirt wall hanging from the periphery of the top wall as a container lid to be attached to the mouth and neck of a beverage container made of synthetic resin such as polyethylene terephthalate or glass thin, chromic acid treated steel sheet or container closure having a metal such as thin plate or we formed the body of the tin sheet is widely used. A synthetic resin liner such as soft polyethylene is disposed on the inner surface of the top wall of the main body. A rupture line extending in the circumferential direction is formed in the skirt wall of the main body, and the skirt wall is divided into a main portion above the break line and a tamper evidence skirt below the break line. In the tamper evidence skirt, a break line extending in the axial direction is usually formed. The mouth and neck of the container has a cylindrical shape with an open upper surface, and a male thread and an annular jaw part located below the male thread are formed on the outer peripheral surface thereof. When the main body is formed of a thin metal plate, after filling the container with the contents, put the container lid on the mouth and neck, press the liner against the mouth and neck, and seal the mouth and neck. A female thread is formed in the main part of the skirt wall along the male thread of the neck, and the lower end of the skirt wall is deformed radially inward and locked to the annular jaw, thus the container lid on the mouth and neck And seal the mouth and neck.
[0003]
[Problems to be solved by the invention]
Thus, the strength of the top wall is not always sufficient for the conventional container lid, and there is a possibility that the top wall may be damaged or deformed when a foreign object collides with the top wall, and the sealing may be damaged. There is a problem to be solved in that a so-called doming phenomenon in which the top wall bulges out in a dome shape when the pressure increases, and the sealing may be damaged.
[0004]
The present invention has been made in view of the above-mentioned facts, and its main technical problem is to improve a container lid including a main body having a circular top wall and a cylindrical skirt wall depending from the peripheral edge of the top wall. Another object of the present invention is to provide a production method that makes it possible to efficiently produce a container lid having sufficient strength of the top wall and sufficient strength of the top wall .
[0005]
[Means for Solving the Problems]
According to one aspect of the present invention, as a container closure strength of the top panel wall have been allowed to be sufficient, and the sheet metal body having a cylindrical skirt wall extending downwardly from the peripheral edge of the circular top surface Kabe及 beauty top panel wall A reinforcing member made of a thin metal plate disposed on the inner surface of the top wall of the main body and a synthetic resin liner, the top wall of the main body being raised at the center thereof, the inner surface of the top panel wall are defined circular recess, reinforcing member has been brought positioned circular the recess I disc shape der, the liner - the lower surface and the top panel wall of the reinforcing member A container lid is provided which is stamped over the inner surface and bonded to the inner surface of the top wall together with the lower surface of the reinforcing member.
[0006]
According to another aspect of the present invention, as a manufacturing method that makes it possible to efficiently manufacture a container lid having a sufficient strength of the top wall, it is suspended from the circular top wall and the periphery of the top wall. A sheet metal body having a cylindrical skirt wall, a sheet metal reinforcing member disposed on the inner surface of the top wall of the body, and a synthetic resin liner, A disc shape having an outer diameter smaller than the outer diameter of the top wall, and is concentrically laminated on the inner surface of the top wall, and the synthetic resin liner comprises the lower surface of the reinforcing member and the inner surface of the top wall And a manufacturing method of a container lid that is stamped over and bonded to the inner surface of the top wall together with the lower surface of the reinforcing member,
The reinforcing member having a heat-adhesive synthetic resin coating on the top surface is positioned concentrically on the inner surface of the top wall, and then the heat-adhesive synthetic resin coating is heated to place the reinforcing member on the inner surface of the top wall. There is provided a manufacturing method characterized by temporarily adhering and then supplying a synthetic resin material onto the lower surface of the reinforcing member, and molding the synthetic resin liner by embossing the synthetic resin material. .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.
[0008]
Referring to FIG. 1, the illustrated container lid, generally indicated by numeral 2, includes a main body 4, a reinforcing member 6, and a synthetic resin liner 8. The main body 4 which can be formed from an appropriate metal thin plate such as an aluminum-based alloy thin plate, a chromate-treated steel thin plate or a tin thin plate has a circular top wall 10 and a cylindrical skirt wall 12 depending from the periphery of the top wall 10. . An annular bulging portion 14 bulged somewhat outward in the radial direction is disposed at the bottom of the skirt wall 12. The annular bulging portion 14 is formed with a breaking line 16 extending in the circumferential direction, and the skirt wall 12 has a main portion 18 above the breaking line 16 and a tamper evidence skirt 20 below the breaking line 16. It is divided into and. The fracture line 16 includes a plurality of slits 22 extending in the circumferential direction at intervals in the circumferential direction and a plurality of bridging portions 24 positioned between the slits 22. One of the plurality of bridging portions 24 is fastened to a wide bridging portion 24 </ b> A having a larger circumferential width than the other bridging portions 24. An annular groove 26 extending in the circumferential direction is formed at the upper part of the outer peripheral surface of the main portion 18 of the skirt wall 12. An annular concavo-convex shape portion 28 extending in the circumferential direction above the annular groove portion 26 is also formed on the upper portion of the outer peripheral surface of the main portion 18 of the skirt wall 12. An axial break line 30 extending downward from one end of the wide bridging portion 24 </ b> A to the lower end of the tamper evidence skirt 20 is formed in the tamper evidence skirt 20 of the skirt wall 12. Such an axial break line 30 may be a so-called score formed by reducing the material thickness.
[0009]
Continuing the description with reference to FIG. 1, the reinforcing member 6 is also formed of an appropriate metal thin plate such as an aluminum-based alloy thin plate, a chromate-treated steel thin plate or a tin thin plate. The reinforcing member 6 has a disk shape having an outer diameter smaller than the outer diameter of the top wall 10 of the main body 4, and is concentrically laminated on the inner surface of the top wall 10. As will be further described later, a thermal adhesive synthetic resin coating is applied to the upper surface of the reinforcing member 6.
[0010]
The synthetic resin liner 8 is embossed over the lower surface of the reinforcing member 6 and the inner surface of the top wall 10, and is adhered to the inner surface of the top wall 10 together with the lower surface of the reinforcing member 6. Is held at a required position, that is, a position laminated on the inner surface of the top wall 10. The synthetic resin liner 8 that can be conveniently formed from an appropriate synthetic resin material such as soft polyethylene has a disc shape as a whole, and two concentric sealing ridges formed at the thin central portion 32 and the peripheral portion. 34 and 36.
[0011]
FIG. 2 schematically illustrates an example of a manufacturing process for efficiently manufacturing the container lid 2 as described above. First, as shown in FIG. 2-A, a disk-shaped reinforcing member 6 is formed by punching out a thin metal plate having a thermal adhesive resin coating on one side (the lower surface in FIG. 2-A). Next, the separately formed main body 4 is turned upside down and turned upside down. As shown in FIG. 2-B, one side of the reinforcing member 6 (shown in FIG. 1) coated with a thermal adhesive resin is applied. In the state, the upper surface is opposed to the inner surface of the top wall 10 of the main body 4, and the reinforcing member 6 is laminated concentrically on the inner surface of the top wall 10. Then, a heating means (not shown) that may be subjected to high-frequency heating in a state in which the one surface (upper surface in the state shown in FIG. 1) of the reinforcing member 6 and the inner surface of the top wall 10 are in close contact with each other, which is coated with the thermal adhesive resin coating The heat-adhesive resin coating is heated to temporarily bond the reinforcing member 6 to the inner surface of the top wall 10. Thus, accidental displacement of the reinforcing member 6 positioned concentrically on the inner surface of the top wall 10 is prevented. Thereafter, as shown in FIG. 2C, the softened and melted synthetic resin material 38 is supplied onto the other side of the reinforcing member 6 (the lower surface in the state shown in FIG. 1). Then, an embossing tool (not shown) having a required shape is made to act on the synthetic resin material 38, and as shown in FIG. 2-D, the other side of the reinforcing member 6 (in the state shown in FIG. 1). ) And a synthetic resin liner 8 straddling the inner surface of the top wall 10.
[0012]
FIG. 3 illustrates a state in which the container lid 2 is attached to the mouth / neck portion 40 of the container as required and the mouth / neck portion 40 is sealed. A mouth and neck portion 40 of a container that can be formed from an appropriate synthetic resin such as polyethylene terephthalate or glass has a substantially cylindrical shape, and an outer peripheral surface thereof has a male thread 42 and a ring located below the male thread 42. A chin portion 44 is formed. When the container lid 2 is attached to the mouth and neck portion 40 and the mouth and neck portion 40 is sealed, the container lid 2 is fitted on the mouth and neck portion 40 and a pressing force is applied to the outer surface of the top wall 10 of the main body 4. The sealing ridges 34 and 36 of the synthetic resin liner 8 are brought into close contact with the upper end of the mouth-and-neck portion 40. Next, a female thread 46 is formed in the main portion 18 of the skirt wall 12 of the main body 4 along the male thread 42 of the mouth and neck portion 40, more specifically in a region below the annular groove 26. In addition, the lower end portion of the tamper evidence skirt portion 20 is bent inward in the radial direction and is engaged with the annular jaw portion 44 of the mouth and neck portion 40.
[0013]
In the illustrated container lid 2, a reinforcing member 6 is laminated on the inner surface of the top wall 10 of the main body 2, and the top wall 10 of the main body 4 is effectively reinforced by the reinforcing member 6. Therefore, for example, even if a foreign object collides with the outer surface of the top wall 10, the possibility that the top wall 10 is broken or deformed is sufficiently small. Moreover, even if the pressure in the container is raised, the occurrence of a doming phenomenon in which the top wall 10 of the main body 4 bulges out in a dome shape is sufficiently suppressed.
[0014]
To open the mouth / neck portion 40 of the container, the main body 4 is rotated in the opening direction, that is, counterclockwise as viewed from above in FIG. Thus, the main body 2 is raised along with the rotation by the cooperation of the male thread 42 and the female thread 46. However, since the lower end portion of the tamper evident skirt portion 20 is locked to the annular jaw portion 44, the tamper evidence skirt portion 20 cannot be raised freely, and the breaking line 16 extending in the circumferential direction and the breaking line extending in the axial direction. A considerable stress is generated at 30. Thus, the fracture line 16 is fractured leaving its wide bridging portion 24A and the fracture line 30 is fractured, and the tamper evidence skirt 20 is opened from an endless annular shape to an end band shape. After that, the tamper evidence skirt portion 20 of the main body 4 is allowed to rise freely with rotation, and the entire container lid 2 including the main body 4, the reinforcing member 6, and the synthetic resin liner 8 is formed in the mouth / neck portion 40. The mouth and neck 40 is opened.
[0015]
Figure 4 illustrates the implementation form of the container closure constructed in accordance with the present invention. In the embodiment illustrated in FIG. 4, the top surface wall 110 of the main body 104 has a central portion raised upward in a disk shape, and the central portion of the inner surface of the top surface wall 110 has a disk-shaped reinforcement. A circular recess 107 having substantially the same dimensions as the member 106 is defined concentrically. The reinforcing member 106 is concentrically positioned in the circular recess 107.
[0016]
As an example of a manufacturing process for manufacturing the container lid 102, first, a metal thin plate (in this modification, it is possible to omit applying a heat-adhesive resin coating on one surface of the metal thin plate) is punched out. A disk-shaped reinforcing member 106 is formed at Next, as shown in FIG. 5, the main body 104 separately formed in the form shown in FIG. 4 is turned upside down and the reinforcing member 106 is placed in the circular recess 107 of the top wall 110. To do. In this way, the reinforcing member 106 is restrained in the circular recess 107, and the reinforcing member 106 positioned concentrically on the inner surface of the top wall 110 is prevented from being accidentally displaced. Thereafter, a synthetic resin material in a softened and melted state is supplied onto one side of the reinforcing member 106 (the lower surface in the state shown in FIG. 4), and an embossing tool having a required shape is applied to act on one side (see FIG. 4). In the illustrated state, a synthetic resin liner 108 is formed to straddle the lower surface and the inner surface of the top wall 110.
[0017]
The preferred embodiments of the container lid of the present invention have been described in detail with reference to the accompanying drawings. However, the present invention is not limited to such embodiments, and various modifications and corrections can be made without departing from the scope of the present invention. Is possible .
[0018]
【The invention's effect】
According to the container lid of the present invention, the top wall of the main body is reinforced with sufficient strength by the reinforcing member. Moreover, according to the manufacturing method of this invention, the container lid with which the top | upper surface wall was reinforced can be manufactured efficiently.
[Brief description of the drawings]
FIG. 1 is a front view showing a part of an example of a container lid with a reinforced top wall in section.
2 is a simplified diagram showing an example of a manufacturing process of the container lid in FIG. 1. FIG.
FIG. 3 is a front view partially showing a state in which the container lid of FIG. 1 is attached to the mouth and neck of the container.
Figure 4 is a partial enlarged sectional view showing an enlarged part of the implementation form of the container closure constructed in accordance with the present invention.
Figure 5 is a simplified diagram of a portion of an example of an implementation form of the manufacturing process of the container closure constructed in accordance with present invention.
[Explanation of symbols]
2: Container lid 4: Main body 6: Reinforcing member 8: Synthetic resin liner 10: Top wall 12: Skirt wall 102: Container lid 104: Main body 106: Reinforcing member 107: Circular recess 108: Synthetic resin liner 110: Top wall

Claims (2)

円形天面壁及び該天面壁の周縁から垂下する円筒形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金属薄板製補強部材と、合成樹脂製ライナーとを具備し、該本体の該天面壁はその中央部が上方に***せしめられていて、該天面壁の内面には円形凹部が規定されており、該補強部材は円板形状であって該円形凹部内に位置せしめられており、該ライナ−は該補強部材の下面と該天面壁の内面とに跨って型押成形されていて、該補強部材の下面と共に該天面壁の内面に接着されている、ことを特徴とする容器蓋。A sheet metal body having a cylindrical skirt wall extending downwardly from the peripheral edge of the circular top surface Kabe及 beauty top panel wall, a sheet metal-made reinforcing member disposed on the inner surface of the top wall of the body, the synthetic resin liner comprising the door, the top panel wall of the body is a central portion thereof have been brought raised above, the inner surface of the top wall are defined circular recess, reinforcing member I disc shape der The liner is positioned in the circular recess, and the liner is stamped over the lower surface of the reinforcing member and the inner surface of the top wall, and is bonded to the inner surface of the top wall together with the lower surface of the reinforcing member. A container lid characterized by that. 円形天面壁及び該天面壁の周縁から垂下する円筒形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金属薄板製補強部材と、合成樹脂製ライナーとを具備し、該補強部材は該本体の該天面壁の外径よりも小さい外径を有する円板形状であり、該天面壁の内面に同心状に積層せしめられており、該合成樹脂製ライナーは該補強部材の下面と該天面壁の内面とに跨がって型押成形されていて、該補強部材の下面と共に該天面壁の内面に接着されている容器蓋の製造方法にして、
上面に熱接着性合成樹脂コーティングを施した該補強部材を該天面壁の内面に同心状に位置せしめ、次いで該熱接着性合成樹脂コーティングを加熱することによって該補強部材を該天面壁の内面に仮接着せしめ、しかる後に該補強部材の下面上に合成樹脂素材を供給し、該合成樹脂素材を型押成形して該合成樹脂製ライナーを成形する、ことを特徴とする製造方法
A sheet metal main body having a circular top wall and a cylindrical skirt wall depending from the peripheral edge of the top wall, a sheet metal reinforcing member disposed on the inner surface of the top wall of the body, and a synthetic resin liner The reinforcing member has a disk shape having an outer diameter smaller than the outer diameter of the top wall of the main body, and is laminated concentrically on the inner surface of the top wall. In the manufacturing method of the container lid that is embossed over the lower surface of the reinforcing member and the inner surface of the top wall, and is bonded to the inner surface of the top wall together with the lower surface of the reinforcing member,
The reinforcing member having a heat-adhesive synthetic resin coating on the top surface is positioned concentrically on the inner surface of the top wall, and then the heat-adhesive synthetic resin coating is heated to place the reinforcing member on the inner surface of the top wall. A manufacturing method comprising: temporarily adhering, and then supplying a synthetic resin material onto the lower surface of the reinforcing member, and molding the synthetic resin material by embossing the synthetic resin material .
JP2001025483A 2001-02-01 2001-02-01 Container lid with reinforced top wall and manufacturing method thereof Expired - Lifetime JP4745508B2 (en)

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JP4575678B2 (en) * 2004-02-13 2010-11-04 日本クラウンコルク株式会社 Container lid

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