JP4585126B2 - Container lid with reinforced top wall - Google Patents

Container lid with reinforced top wall Download PDF

Info

Publication number
JP4585126B2
JP4585126B2 JP2001010058A JP2001010058A JP4585126B2 JP 4585126 B2 JP4585126 B2 JP 4585126B2 JP 2001010058 A JP2001010058 A JP 2001010058A JP 2001010058 A JP2001010058 A JP 2001010058A JP 4585126 B2 JP4585126 B2 JP 4585126B2
Authority
JP
Japan
Prior art keywords
wall
reinforcing member
main body
container lid
circular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2001010058A
Other languages
Japanese (ja)
Other versions
JP2002211603A (en
Inventor
誠司 福士
浩 佐藤
光雄 熊田
英彦 近江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Closures Co Ltd
Original Assignee
Nippon Closures Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Closures Co Ltd filed Critical Nippon Closures Co Ltd
Priority to JP2001010058A priority Critical patent/JP4585126B2/en
Publication of JP2002211603A publication Critical patent/JP2002211603A/en
Application granted granted Critical
Publication of JP4585126B2 publication Critical patent/JP4585126B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Closures For Containers (AREA)

Description

【0001】
【発明の属する技術分野】
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金属薄板製本体を具備する容器蓋に関する。
【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有する、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から成形された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とに区画されている。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。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、金属薄板製本体を具備する従来の容器蓋には次のとおりの解決すべき問題がある。第一に、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。第二に、ライナーが本体の天面壁の内面に固定されている形態の容器蓋においては、容器の口頸部を開封する際には、口頸部に対して容器蓋を回転せしめることが必要であるが、この際には口頸部に押圧されているライナーを口頸部に対して回転せしめることが必要であり、これに起因して口頸部の開封に要する所謂開封トルクが相当大きくなる。
【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金属薄板製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、そして更に口頸部を開封する際に要する開封トルクが過剰になることを確実に回避することである。
【0005】
【課題を解決するための手段】
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、金属薄板製補強部材と、合成樹脂製ライナーとを具備し、該補強部材は円形壁を有し、該ライナーは該円形壁の下面に配設されており、該本体の該スカート壁には半径方向内側に突出せしめられた内側突出部が形成されており、該内側突出部に該補強部材の自由端縁を係合せしめることによって、該補強部材の該円形壁が該本体の該天面壁の内面に対向して位置する状態に該補強部材が該本体内に拘束されている、ことを特徴とする容器蓋が提供される。
【0006】
好ましくは、該補強部材は該円形壁の周縁から垂下する垂下壁を有し、該垂下壁の自由端縁が該内側突出部に係合せしめられる。該本体の該スカート壁の上端部には周方向に間隔をおいて複数個の開口が形成されており、該開口の各々は該スカート壁に刻設した切断線に沿った領域を半径方向内側に突出せしめることによって形成されており、該内側突出部は該領域によって規定されているのが好ましい。該領域の各々は上方に向かって半径方向内側に傾斜して延び、該補強部材の該垂下壁の自由端縁が該領域の自由端縁に係合せしめられているのが好都合である。
【0007】
【発明の実施の形態】
以下、添付図面を参照して、本発明に従って構成された容器蓋の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の上部には環状溝部26が形成されている。また、環状溝部26の上方には、周方向に間隔をおいて複数個の開口28が形成されている。かかる開口28の各々は、スカート壁12に刻設した切断線に沿った領域を半径方向内側に突出せしめることによって形成されているのが好都合である。図示の実施形態においては、切断線は実質上水平に延びる部分32aと係る部分32aの両端から下方に実質上鉛直に延びる部分32bとを含み、かかる切断線32a及び32bによって矩形領域30が規定されている。矩形領域30は半径方向内側に変位せしめられ、半径方向内側に向かって上方に傾斜して延びている。後に更に言及する如く、矩形領域30は補強部材6を拘束する内側突出部を構成する。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33が形成されている。かかる軸線方向破断ライン33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。図示の実施形態における補強部材6は円形壁34とこの円形壁34の周縁から垂下する垂下壁36とを有する。円形壁34は実質上水平に延在し、垂下壁36は円形壁34の周縁から断面図において四半円弧状に垂下している。後に更に詳述する如く、補強部材6は本体4内の所要位置、即ち図1に図示する位置に強制的に導入される(かかる導入の際には、本体4のスカート壁12における環状溝部26及び矩形領域30が半径方向外方に弾性的に変位せしめられる)。図2に明確に図示する如く、補強部材6を本体4内の所要位置に導入すると、補強部材6の円形壁34は本体4の天面壁10の内面に対向して位置する。そして、補強部材6の垂下壁36の自由端縁36aが本体4のスカート壁14における上記矩形領域30の自由端縁30aに係合せしめられ、これによって本体4内の所定位置に補強部材6が拘束されている。図示の実施形態においては、補強部材6の円形壁34は本体4の天面壁10の内面に積層され、天面壁10の内面に実質上密接せしめられている。しかしながら、後の説明から理解されるとおり、容器の口頸部に所要とおりに容器蓋2を装着すると、補強部材6にはこれを上方に強制する力が加えられる故に、容器の口頸部に容器蓋2を装着する前の状態においては、本体4の天面壁10の内面と補強部材6の円形壁34の上面との間には幾分かの間隙が存在していてもよい。
【0010】
合成樹脂製ライナー8は補強部材6の円形壁34の下面上に配設されている。軟質ポリエチレンの如き適宜の合成樹脂素材を型押成形することによって好都合に成形することができる合成樹脂製ライナー8は、全体として円板形状であり、薄肉中央部38と周縁部に形成されている2条の同心状密封突条40及び42を有する。
【0011】
図3は、上述したとおりの容器蓋2を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3−Aに図示する如く、金属薄板に打ち抜き及び絞りの如き所要機械加工を加えて補助部材6を成形する(図3−Aにおいては補強部材6は上下が逆にせしめられた反転状態で図示されている)。次いで、図3−Bに図示する如く、反転状態にせしめられている補強部材6の片面上に軟化溶融状態の合成樹脂素材44を供給する。そして、かかる合成樹脂素材44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3−Cに図示する如く、補強部材6の片面(図1に図示する状態では下面、図3に図示する状態では上面)上に合成樹脂製ライナー8を型押成形する。しかる後に、図3−Dに図示する如く、それ自体は周知の様式によって別個に製造した本体4内に補強部材6を強制的に導入する。本体4のスカート壁12における環状溝部26の内径、及び複数個の矩形領域30の自由端縁30aによって規定される仮想円の直径は、補強部材6の外径をよりも若干小さい故に、補強部材6を本体4内の所要位置まで強制的に導入する際には、本体4のスカート壁12における環状溝部26及び矩形領域30が半径方向外方に幾分弾性的に変位せしめられる。
【0012】
図3に図示する製造工程においては、補強部材6を本体4内に導入する前に、補強部材6の片面上に合成樹脂製ライナー8を型押成形しているが、所望ならば、本体4内の所要位置に補強部材6を導入した後に補強部材6の片面上に合成樹脂製ライナー8を型押成形することもできる。また、本体4内の所要位置に補強部材6を導入せしめた後に、本体4に機械加工を加えて環状溝部26を形成することもできる。更に、矩形領域30を生成せしめる開口28の形成も、所望ならば、本体4内の所要位置に補強部材6を導入した後に遂行することができる。
【0013】
図4は、容器の口頸部46に容器蓋2を所要とおりに装着して口頸部46を密封した状態を図示している。ガラス或いはポリエチレンテレフタレートの如き適宜の合成樹脂から形成することができる容器の口頸部46は略円筒形状であり、その外周面には雄螺条48とこの雄螺条48の下方に位置する環状あご部50が形成されている。口頸部46に容器蓋2を装着して口頸部46を密封する際には、口頸部46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40及び42を口頸部46の上端部に密接せしめる。かくすると、合成樹脂製ライナー8を介して補強部材6は本体4に対して上方に強制され、補強部材6の円形壁34の上面が本体4の天面壁10の内面に密接せしめられる。次いで、口頸部46の雄螺条48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52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46の環状あご部50に係止せしめる。
【0014】
本発明に従って構成された容器蓋2においては、本体2の天面壁10の内面に補強部材6の円形壁34が密接せしめられており、補強部材6の円形壁34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。
【0015】
容器の口頸部46を開封するためには、本体4を開方向、即ち図4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48と雌螺条52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50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32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32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46から離脱され、口頸部46が開封される。
【0016】
而して、本発明に従って構成された容器蓋2においては、合成樹脂製ライナー8は本体4の天面壁10の内面ではなくて補強部材6の円形壁34の下面に配設されており、補強部材6は本体4に対して相対的に回転することができる。それ故に、口頸部46を開封するための上述したとおりの操作の初期において、口頸部46の上端部に密接せしめられている合成樹脂製ライナー8を口頸部46に対して回転せしめる必要なくして、本体4を開方向に回転せしめて破断ライン16及び32を所要とおりに破断せしめることができる。従って、開封初期において本体4に加えなければならない必要回転トルクが過剰になることが確実に回避される。合成樹脂製ライナー8が比較的強固に口頸部46に密着せしめられている場合には、破断ライン16及び32の破断の後に本体4に付随して補強部材6及び合成樹脂製ライナー8を上昇せしめて、合成樹脂製ライナー8を口頸部46から離脱せしめることができる。
【0017】
【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の円形壁によって充分な強度に補強され、そしてまた口頸部を開封する初期においては合成樹脂製ライナーを口頸部に対して回転せしめることが不要である故に必要開封トルクが過剰になることが確実に回避される。
【図面の簡単な説明】
【図1】本発明に従って構成された容器蓋の好適実施形態を、一部を断面で示す正面図。
【図2】図1の容器蓋の一部を拡大して示す部分拡大断面図。
【図3】図1の容器蓋の製造工程の一例を示す簡略図。
【図4】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。
【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:本体の天面壁
12:本体のスカート壁
28:開口
30:矩形領域
30a:矩形領域の自由端縁
32a:切断線
32b:切断線
34:補強部材の円形壁
36:補強部材の垂下壁
36a:垂下壁の自由端縁
46:容器の口頸部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container lid having a sheet metal body having a circular top wall and a cylindrical skirt wall depending from the periphery of the top wall.
[0002]
[Prior art]
Aluminum-based alloy thin plate having 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 Container lids having a main body formed of a thin metal plate such as a chromic acid treated steel sheet or a tin sheet are widely used. A liner molded from a synthetic resin 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 on 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. 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 portion, and the lower end portion of the skirt wall is deformed radially inward and locked to the annular jaw portion, and thus a container lid is attached to the mouth and neck portion, and the mouth and neck portion is sealed.
[0003]
[Problems to be solved by the invention]
Thus, the conventional container lid having the metal sheet main body has the following problems to be solved. First, the strength of the top wall is not always sufficient. For example, when a foreign object collides with the top wall, the top wall may be damaged or deformed and the sealing may be damaged, or when the pressure in the container rises, A so-called doming phenomenon in which the face wall bulges out in a dome shape may cause damage to the seal. Secondly, in the case of a container lid in which the liner is fixed to the inner surface of the top wall of the main body, it is necessary to rotate the container lid with respect to the mouth and neck when opening the mouth and neck of the container. However, in this case, it is necessary to rotate the liner pressed against the mouth and neck with respect to the mouth and neck, and as a result, the so-called opening torque required for opening the mouth and neck is considerably large. Become.
[0004]
The present invention has been made in view of the above-mentioned facts, and the main technical problem thereof is an improvement to a container lid having a sheet metal body having a circular top wall and a cylindrical skirt wall depending from the peripheral edge of the top wall. In addition, the strength of the top wall is made sufficient, and the opening torque required for opening the mouth and neck is further prevented from being excessively prevented.
[0005]
[Means for Solving the Problems]
According to the present invention, as the container closure to achieve the above principal object, a sheet metal body having a circular top panel wall, and a cylindrical skirt wall extending downwardly from the peripheral edge of the top wall, and a metallic thin plate made reinforcing member The reinforcing member has a circular wall, the liner is disposed on the lower surface of the circular wall, and protrudes radially inward from the skirt wall of the main body. An inner protrusion is formed, and the circular wall of the reinforcement member is positioned opposite to the inner surface of the top wall of the main body by engaging the free edge of the reinforcement member with the inner protrusion. A container lid is provided, wherein the reinforcing member is constrained in the main body in a state of being in the state of being.
[0006]
Preferably, the reinforcing member has a drooping wall depending from a peripheral edge of the circular wall, and a free edge of the drooping wall is engaged with the inner protrusion. A plurality of openings are formed in the upper end portion of the skirt wall of the main body at intervals in the circumferential direction, and each of the openings has a region along a cutting line engraved in the skirt wall radially inward. Preferably, the inner protrusion is defined by the region. Conveniently, each of the regions extends obliquely inward radially upward and the free edge of the depending wall of the reinforcing member is engaged with the free edge of the region.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, with reference to an accompanying drawing, a suitable embodiment of a container lid constituted according to the present invention is 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. It is divided into. 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 is formed in the upper portion of the main portion 18 of the skirt wall 12. A plurality of openings 28 are formed above the annular groove 26 at intervals in the circumferential direction. Each such opening 28 is advantageously formed by projecting a region along the cutting line inscribed in the skirt wall 12 radially inward. In the illustrated embodiment, the cutting line includes a part 32a that extends substantially horizontally and a part 32b that extends substantially vertically downward from both ends of the part 32a, and a rectangular region 30 is defined by the cutting lines 32a and 32b. ing. The rectangular region 30 is displaced inward in the radial direction, and extends obliquely upward toward the inner side in the radial direction. As will be further described later, the rectangular region 30 constitutes an inner protrusion that restrains the reinforcing member 6. An axial break line 33 extending downward from one end of the wide bridge portion 24A 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 33 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 in the illustrated embodiment has a circular wall 34 and a hanging wall 36 depending from the peripheral edge of the circular wall 34. The circular wall 34 extends substantially horizontally, and the hanging wall 36 hangs down from the peripheral edge of the circular wall 34 in a quarter arc shape in a sectional view. As will be described in detail later, the reinforcing member 6 is forcibly introduced into a required position in the main body 4, that is, a position shown in FIG. 1 (at the time of such introduction, the annular groove portion 26 in the skirt wall 12 of the main body 4. And the rectangular region 30 is elastically displaced radially outward). As clearly shown in FIG. 2, when the reinforcing member 6 is introduced into a required position in the main body 4, the circular wall 34 of the reinforcing member 6 is positioned to face the inner surface of the top wall 10 of the main body 4. Then, the free edge 36 a of the hanging wall 36 of the reinforcing member 6 is engaged with the free edge 30 a of the rectangular region 30 in the skirt wall 14 of the main body 4, whereby the reinforcing member 6 is placed at a predetermined position in the main body 4. It is restrained. In the illustrated embodiment, the circular wall 34 of the reinforcing member 6 is laminated on the inner surface of the top wall 10 of the main body 4 and is substantially in close contact with the inner surface of the top wall 10. However, as will be understood from the following description, when the container lid 2 is attached to the mouth / neck portion of the container as required, the reinforcing member 6 is applied with a force forcing it upward. In a state before the container lid 2 is attached, some gap may exist between the inner surface of the top wall 10 of the main body 4 and the upper surface of the circular wall 34 of the reinforcing member 6.
[0010]
The synthetic resin liner 8 is disposed on the lower surface of the circular wall 34 of the reinforcing member 6. The synthetic resin liner 8 that can be conveniently formed by stamping an appropriate synthetic resin material such as soft polyethylene is a disc shape as a whole, and is formed in the thin central portion 38 and the peripheral portion. Two concentric sealing ridges 40 and 42 are provided.
[0011]
FIG. 3 schematically illustrates an example of a manufacturing process for manufacturing the container lid 2 as described above. First, as shown in FIG. 3A, the auxiliary member 6 is formed by performing required machining such as punching and drawing on a thin metal plate (in FIG. 3A, the reinforcing member 6 is turned upside down). It is shown in the inverted state). Next, as illustrated in FIG. 3B, the softened and melted synthetic resin material 44 is supplied onto one surface of the reinforcing member 6 that is in an inverted state. Then, an embossing tool (not shown) having a required shape is made to act on the synthetic resin material 44, and as shown in FIG. 3C, one side of the reinforcing member 6 (the lower surface in the state shown in FIG. A synthetic resin liner 8 is embossed on the upper surface in the state shown in FIG. Thereafter, as shown in FIG. 3D, the reinforcing member 6 is forcibly introduced into the body 4 manufactured separately in a manner known per se. Since the inner diameter of the annular groove portion 26 in the skirt wall 12 of the main body 4 and the diameter of the virtual circle defined by the free end edges 30a of the plurality of rectangular regions 30 are slightly smaller than the outer diameter of the reinforcing member 6, the reinforcing member When forcing 6 to the required position in the main body 4, the annular groove 26 and the rectangular area 30 in the skirt wall 12 of the main body 4 are somewhat elastically displaced radially outward.
[0012]
In the manufacturing process shown in FIG. 3, a synthetic resin liner 8 is embossed on one side of the reinforcing member 6 before the reinforcing member 6 is introduced into the main body 4. The synthetic resin liner 8 may be embossed on one side of the reinforcing member 6 after the reinforcing member 6 is introduced into the required position. Further, after the reinforcing member 6 is introduced at a required position in the main body 4, the annular groove 26 can be formed by machining the main body 4. Further, the formation of the opening 28 for generating the rectangular region 30 can be performed after the reinforcing member 6 is introduced into a required position in the main body 4 if desired.
[0013]
FIG. 4 illustrates a state in which the container lid 2 is attached to the mouth / neck part 46 of the container as required and the mouth / neck part 46 is sealed. The mouth and neck portion 46 of the container, which can be formed from an appropriate synthetic resin such as glass or polyethylene terephthalate, has a substantially cylindrical shape, and has an external thread 48 and a ring located below the external thread 48 on its outer peripheral surface. A chin portion 50 is formed. When the container lid 2 is attached to the mouth / neck part 46 and the mouth / neck part 46 is sealed, the container lid 2 is fitted on the mouth / neck part 46 and a pressing force is applied to the outer surface of the top wall 10 of the main body 4. The sealing ridges 40 and 42 of the synthetic resin liner 8 are brought into close contact with the upper end portion of the mouth-and-neck portion 46. Thus, the reinforcing member 6 is forced upward with respect to the main body 4 via the synthetic resin liner 8, and the upper surface of the circular wall 34 of the reinforcing member 6 is brought into close contact with the inner surface of the top wall 10 of the main body 4. Next, a female thread 52 is formed in the main portion 18 of the skirt wall 12 of the main body 4 along the male thread 48 of the mouth and neck portion 46, more specifically, in a region below the annular groove portion 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 50 of the mouth and neck portion 46.
[0014]
In the container lid 2 configured according to the present invention, the circular wall 34 of the reinforcing member 6 is in close contact with the inner surface of the top wall 10 of the main body 2, and the top wall 10 of the main body 4 is formed by the circular wall 34 of the reinforcing member 6. Effectively reinforced. 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.
[0015]
In order to open the mouth / neck portion 46 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 with the rotation by the cooperation of the male thread 48 and the female thread 52. However, since the lower end portion of the tamper evident skirt portion 20 is locked to the annular jaw portion 50, 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 32. Thus, the breaking line 16 is broken leaving the wide bridging portion 24A and the breaking line 32 is broken, 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 46. The mouth and neck part 46 is opened.
[0016]
Thus, in the container lid 2 configured according to the present invention, the synthetic resin liner 8 is disposed not on the inner surface of the top wall 10 of the main body 4 but on the lower surface of the circular wall 34 of the reinforcing member 6. The member 6 can rotate relative to the body 4. Therefore, at the initial stage of the operation as described above for opening the mouth and neck portion 46, it is necessary to rotate the synthetic resin liner 8 in close contact with the upper end portion of the mouth and neck portion 46 with respect to the mouth and neck portion 46. Instead, the body 4 can be rotated in the opening direction to break the break lines 16 and 32 as required. Therefore, it is reliably avoided that the necessary rotational torque that must be applied to the main body 4 in the initial stage of opening is excessive. If the synthetic resin liner 8 is relatively firmly attached to the mouth and neck portion 46, the reinforcing member 6 and the synthetic resin liner 8 are raised along with the main body 4 after the breaking lines 16 and 32 are broken. At this time, the synthetic resin liner 8 can be detached from the mouth-and-neck portion 46.
[0017]
【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 circular wall of the reinforcing member, and in the initial stage of opening the mouth and neck, the synthetic resin liner is rotated with respect to the mouth and neck. Since it is not necessary to squeeze, it is reliably avoided that the necessary opening torque is excessive.
[Brief description of the drawings]
FIG. 1 is a front view, partly in section, of a preferred embodiment of a container lid constructed in accordance with the present invention.
FIG. 2 is a partially enlarged cross-sectional view showing a part of the container lid of FIG. 1 in an enlarged manner.
3 is a simplified diagram showing an example of a manufacturing process of the container lid of FIG. 1. FIG.
FIG. 4 is a front view showing a part of the container lid of FIG.
[Explanation of symbols]
2: Container lid 4: Main body 6: Reinforcing member 8: Synthetic resin liner 10: Top wall 12 of main body: Skirt wall 28 of main body: Opening 30: Rectangular region 30a: Free edge 32a of rectangular region: Cutting line 32b: Cutting line 34: circular wall 36 of the reinforcing member 36: hanging wall 36a of the reinforcing member: free edge 46 of the hanging wall 46: mouth and neck of the container

Claims (4)

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、金属薄板製補強部材と、合成樹脂製ライナーとを具備し、該補強部材は円形壁を有し、該ライナーは該円形壁の下面に配設されており、該本体の該スカート壁には半径方向内側に突出せしめられた内側突出部が形成されており、該内側突出部に該補強部材の自由端縁を係合せしめることによって、該補強部材の該円形壁が該本体の該天面壁の内面に対向して位置する状態に該補強部材が該本体内に拘束されている、ことを特徴とする容器蓋。Yes and sheet metal body having a circular top panel wall, and a cylindrical skirt wall extending downwardly from the peripheral edge of the top wall, and a metallic thin plate made reinforcing member, comprises a synthetic resin liner, reinforcing member a circular wall The liner is disposed on the lower surface of the circular wall, and the skirt wall of the main body is formed with an inner protrusion protruding inward in the radial direction, and the reinforcing member is formed on the inner protrusion. The reinforcing member is constrained within the main body so that the circular wall of the reinforcing member is positioned opposite to the inner surface of the top wall of the main body by engaging the free edge of the main body. Characteristic container lid. 該補強部材は該円形壁の周縁から垂下する垂下壁を有し、該垂下壁の自由端縁が該内側突出部に係合せしめられる、請求項1記載の容器蓋。  The container lid according to claim 1, wherein the reinforcing member has a hanging wall depending from a peripheral edge of the circular wall, and a free edge of the hanging wall is engaged with the inner protrusion. 該本体の該スカート壁の上端部には周方向に間隔をおいて複数個の開口が形成されており、該開口の各々は該スカート壁に刻設した切断線に沿った領域を半径方向内側に突出せしめることによって形成されており、該内側突出部は該領域によって規定されている、請求項1又は2記載の容器蓋。  A plurality of openings are formed in the upper end of the skirt wall of the main body at intervals in the circumferential direction, and each of the openings has a region along a cutting line engraved in the skirt wall radially inward. The container lid according to claim 1, wherein the inner protrusion is defined by the region. 該領域の各々は上方に向かって半径方向内側に傾斜して延び、該補強部材の該垂下壁の自由端縁が該領域の自由端縁に係合せしめられている、請求項3記載の容器蓋。  4. A container according to claim 3, wherein each of said regions extends obliquely inwardly in the upward direction, and a free edge of said hanging wall of said reinforcing member is engaged with a free edge of said region. lid.
JP2001010058A 2001-01-18 2001-01-18 Container lid with reinforced top wall Expired - Fee Related JP4585126B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001010058A JP4585126B2 (en) 2001-01-18 2001-01-18 Container lid with reinforced top wall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001010058A JP4585126B2 (en) 2001-01-18 2001-01-18 Container lid with reinforced top wall

Publications (2)

Publication Number Publication Date
JP2002211603A JP2002211603A (en) 2002-07-31
JP4585126B2 true JP4585126B2 (en) 2010-11-24

Family

ID=18877439

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001010058A Expired - Fee Related JP4585126B2 (en) 2001-01-18 2001-01-18 Container lid with reinforced top wall

Country Status (1)

Country Link
JP (1) JP4585126B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013146116A1 (en) 2012-03-30 2013-10-03 日本クロージャー株式会社 Method for manufacturing cap
KR20170028354A (en) 2014-06-27 2017-03-13 니혼 클로져 가부시키가이샤 Metallic cap and manufacturing method therefor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7147123B2 (en) * 2003-09-10 2006-12-12 Takeuchi Press Industries Co., Ltd. Metal cap
JP4925158B2 (en) * 2005-08-19 2012-04-25 大和製罐株式会社 Structure of resin liner for cap
JP5241204B2 (en) * 2007-02-05 2013-07-17 ユニバーサル製缶株式会社 Cap with liner, method for producing the same, and bottle with cap

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6121354A (en) * 1984-07-04 1986-01-30 日本クラウンコルク株式会社 Combination of vessel having explosion-proof characteristic and vessel cover

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6121354A (en) * 1984-07-04 1986-01-30 日本クラウンコルク株式会社 Combination of vessel having explosion-proof characteristic and vessel cover

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013146116A1 (en) 2012-03-30 2013-10-03 日本クロージャー株式会社 Method for manufacturing cap
KR20140142735A (en) 2012-03-30 2014-12-12 니혼 클로져 가부시키가이샤 Method for manufacturing cap
US10065233B2 (en) 2012-03-30 2018-09-04 Nippon Closures Co., Ltd. Method for manufacturing cap
KR20170028354A (en) 2014-06-27 2017-03-13 니혼 클로져 가부시키가이샤 Metallic cap and manufacturing method therefor
EP3603925A1 (en) 2014-06-27 2020-02-05 Nippon Closures Co., Ltd. Metal cap
US10800585B2 (en) 2014-06-27 2020-10-13 Nippon Closures Co., Ltd. Manufacturing method for metal cap

Also Published As

Publication number Publication date
JP2002211603A (en) 2002-07-31

Similar Documents

Publication Publication Date Title
JP6515952B2 (en) Method of manufacturing bottle can, bottle can with cap, and bottle can
EP0003400A1 (en) Containers
JPS61273354A (en) Vessel sealing cap
WO2013146116A1 (en) Method for manufacturing cap
JP4253465B2 (en) Combination of metal sheet container and container lid
JPS6218421B2 (en)
US3851782A (en) Container closure with vent opening means
JPH07309357A (en) Container lid made of synthetic resin
JP5095097B2 (en) Container lid
JP4585126B2 (en) Container lid with reinforced top wall
US3606076A (en) Container opening means
JP2964359B2 (en) Metal container lid and weakening line forming device
JP2021098553A (en) Method of manufacturing container lid
US3918378A (en) Container closure with vent opening means and method of forming the same
JP4503308B2 (en) Container lid for sheet metal container
JP4594687B2 (en) Container lid composed of metal sheet shell and synthetic resin packing
JP5298349B2 (en) Lid installation method
JP4383769B2 (en) Container lid with internal pressure release characteristics
JP4745508B2 (en) Container lid with reinforced top wall and manufacturing method thereof
JP3990587B2 (en) A container lid comprising a thin metal shell and a synthetic resin liner
JP2013082488A (en) Container with metal cap and method of molding the same
JP5298348B2 (en) A synthetic resin lid and a container composed of the lid and the container body
JP6793219B2 (en) Container lid with metal sheet shell and synthetic resin liner
JP5352899B2 (en) A synthetic resin lid and a container composed of the lid and the container body
JP5298351B2 (en) A synthetic resin lid and a container composed of the lid and the container body

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20070831

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20100415

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100420

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100610

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100817

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100903

R150 Certificate of patent or registration of utility model

Ref document number: 4585126

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130910

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees