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JP3493635B2 - Metal container lid - Google Patents

Metal container lid

Info

Publication number
JP3493635B2
JP3493635B2 JP28070494A JP28070494A JP3493635B2 JP 3493635 B2 JP3493635 B2 JP 3493635B2 JP 28070494 A JP28070494 A JP 28070494A JP 28070494 A JP28070494 A JP 28070494A JP 3493635 B2 JP3493635 B2 JP 3493635B2
Authority
JP
Japan
Prior art keywords
circumferential
difficult
score
container lid
slit
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 - Lifetime
Application number
JP28070494A
Other languages
Japanese (ja)
Other versions
JPH08143052A (en
Inventor
寿 中嶋
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 JP28070494A priority Critical patent/JP3493635B2/en
Publication of JPH08143052A publication Critical patent/JPH08143052A/en
Application granted granted Critical
Publication of JP3493635B2 publication Critical patent/JP3493635B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D41/00Caps, 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
    • B65D41/32Caps 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
    • B65D41/34Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/3442Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container
    • B65D41/3447Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container the tamper element being integrally connected to the closure by means of bridges
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D41/00Caps, 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
    • B65D41/32Caps 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
    • B65D41/34Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/3404Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with ratchet-and-pawl mechanism between the container and the closure skirt or the tamper element
    • B65D41/3409Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with ratchet-and-pawl mechanism between the container and the closure skirt or the tamper element the tamper element being integrally connected to the closure by means of bridges

Landscapes

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

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、ピルファープルーフ特
性を有する金属製容器蓋、更に詳しくは容器の開封の際
にはピルファープルーフ裾部を含む容器蓋の全体が容器
から離脱される形態の金属製容器蓋に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal container lid having a pill fur proof characteristic, and more particularly, a form in which the entire container lid including the pill fur proof hem is detached from the container when the container is opened. Of the metal container lid of.

【0002】[0002]

【従来の技術】飲食料等のためのガラス或いは合成樹脂
製瓶の如き容器に適用される容器蓋として、容器の開封
の際には無端環形状のピルファープルーフ裾部が有端帯
形状に展開せしめられて、ピルファープルーフ裾部を含
む容器蓋の全体が容器から離脱せしめられる形態の金属
製容器蓋が広く実用に供されている。
2. Description of the Related Art As a container lid applied to a container such as a glass or synthetic resin bottle for food and drink, an endless ring-shaped pill fur proof hem has an endless belt shape when the container is opened. BACKGROUND ART A metal container lid in a form in which it is unfolded and the entire container lid including the pill fur proof hem is detached from the container is widely used.

【0003】上記形態の金属製容器蓋は、天面壁とこの
天面壁から垂下する筒状スカート壁とを具備する。スカ
ート壁には周方向に延在する周方向弱化ラインが配設さ
れており、周方向弱化ラインよりも上方の主部と周方向
弱化ラインよりも下方のピルファープルーフ裾部とに区
画されている。周方向弱化ライン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(即ち切溝)とかか
るスリット間に位置する複数個の橋絡部とから構成され
ている。橋絡部は1個の難破断橋絡部と複数個の易破断
橋絡部とを含んでおり、難破断橋絡部の周方向長さは易
破断橋絡部の周方向長さよりも長い。ピルファープルー
フ裾部には、開回転方向に見て難破断橋絡部の直後方に
位置するスリットから軸線方向下方に延びる軸線方向弱
化ラインが配設されている。
The metal container lid of the above-mentioned form comprises a top surface wall and a cylindrical skirt wall hanging from the top surface wall. A circumferential weakening line extending in the circumferential direction is arranged on the skirt wall, and is divided into a main portion above the circumferential weakening line and a pilfer proof hem below the circumferential weakening line. There is. The circumferential weakening line is composed of a plurality of circumferentially spaced slits (that is, kerfs) extending in the circumferential direction and a plurality of bridging portions located between the slits. The bridging portion includes one difficult-to-break bridging portion and a plurality of easily-breakable bridging portions, and the circumferential length of the hard-to-break bridging portion is longer than the circumferential length of the easily-breakable bridging portion. The pill fur proof skirt is provided with an axial weakening line extending axially downward from a slit located immediately behind the difficult-to-break bridge portion when viewed in the opening rotation direction.

【0004】上記形態の金属製容器蓋は、口頸部の外周
面には雄螺条とこの雄螺条の下方に位置する係止あご部
が形成されている容器に適用される。容器の口頸部に容
器蓋を装着して密封する際には、口頸部に容器蓋を被嵌
して、口頸部の雄螺条に沿ってスカート壁の主部に雌螺
条を形成し、そしてまたピルファープルーフ裾部の下端
部を内側に折り曲げて係止あご部に係止せしめる。容器
の口頸部を開封する際には、容器蓋を開回転方向、即ち
口頸部の雄螺条から容器蓋の雌螺条を開放せしめる方向
に回転せしめる。かくすると、容器蓋は回転に応じて上
方に移動せんとするが、ピルファープルーフ裾部の下端
部は係止あご部に係止されている故に、容器蓋の上方へ
の移動が阻止される。従って、スカート壁に形成されて
いる周方向弱化ラインにおける橋絡部に相当な応力が生
成され、これによって易破断橋絡部が破断される。そし
てまた、ピルファープルーフ裾部に形成されている軸線
方向弱化ラインが破断され、ピルファープルーフ裾部が
無端環形状から有端帯形状に展開される。周方向破断ラ
インにおける難破断橋絡部は破断されることなく維持さ
れ続ける。しかる後においては、容器蓋の全体が回転と
共に上方に移動せしめられて容器の口頸部から離脱され
る。容器の内容物が完全に消費されることなく残留し、
従って容器の口頸部から離脱した容器蓋を再び口頸部に
装着して口頸部を仮密封することが望まれる場合には、
破断されることなく維持されている難破断橋絡部乃至そ
の近傍を破断し、ピルファープルーフ裾部が切り離され
た容器蓋を口頸部に螺着する。
The metal container lid of the above-mentioned form is applied to a container in which a male screw thread and a locking jaw portion located below the male screw thread are formed on the outer peripheral surface of the mouth and neck portion. When attaching and sealing the container lid to the mouth and neck of the container, fit the container lid onto the mouth and neck and attach the female thread to the main part of the skirt wall along the male thread of the mouth and neck. Form, and also fold the bottom edge of the pill fur proof hem inward to lock onto the locking jaw. When opening the mouth-neck portion of the container, the container lid is rotated in the opening rotation direction, that is, the direction in which the female screw thread of the container lid is opened from the male screw thread of the mouth-neck part. In this way, the container lid does not move upward in accordance with the rotation, but the lower end of the pill fur proof hem is locked by the locking jaw, so that the container lid is prevented from moving upward. . Therefore, a considerable stress is generated in the bridging portion in the circumferential weakening line formed on the skirt wall, whereby the easily breakable bridging portion is broken. Further, the axial weakening line formed on the pill fur proof hem is broken, and the pill fur proof hem is expanded from the endless ring shape to the end strip shape. The difficult-to-break bridge portion on the circumferential break line is maintained without being broken. After that, the entire container lid is moved upward with the rotation and separated from the mouth and neck of the container. The contents of the container remain without being completely consumed,
Therefore, when it is desired to attach the container lid detached from the mouth and neck of the container to the mouth and neck again to temporarily seal the mouth and neck,
The difficult-to-break bridging portion that is maintained without being broken or the vicinity thereof is broken, and the container lid from which the pill fur proof hem is separated is screwed to the mouth and neck.

【0005】上記形態の金属製容器蓋においては、
(1)容器蓋を容器の口頸部に装着する際には周方向弱
化ラインにおける全ての橋絡部(易破断橋絡部及び難破
断橋絡部)及び軸線方向弱化ラインが破断されることな
く完全に維持されること、(2)容器の口頸部を開封す
る際には、周方向弱化ラインにおける易破断橋絡部は破
断されるが難破断橋絡部は破断されることなく確実に維
持され、そして軸線方向弱化ラインが破断されてピルフ
ァープルーフ裾部が無端環形状から有端帯形状に展開さ
れること(難破断橋絡部も破断されてピルファープフー
フ裾部がスカート壁の主部から切り離されてしまうと、
ピルファープルーフ裾部が口頸部から離脱されることな
く残留してしまう)、及び(3)開封の後において鋭い
鋸歯形状等を残留せしめることなくピルファープルーフ
裾部をスカート壁の主部から分離せしめることができる
ことが重要である。
In the metal container lid of the above-mentioned form,
(1) When the container lid is attached to the mouth and neck of the container, all bridging parts (easily breakable bridging parts and hard-to-break bridging parts) and axial weakening lines in the circumferential weakening line are not broken. (2) When opening the mouth and neck of the container, the easily breakable bridging part in the circumferential weakening line is broken, but the difficult breakable bridging part is securely maintained without being broken. Then, the weakening line in the axial direction is broken and the pilfer proof hem is expanded from an endless ring shape to an endless belt shape (the difficult-to-break bridge is also ruptured and the pilfer puff hem is mainly formed on the skirt wall). Once separated from the department,
(The pill fur proof hem remains without being detached from the mouth and neck), and (3) the pill fur proof hem is removed from the main part of the skirt wall without leaving a sharp sawtooth shape after opening. It is important to be able to separate them.

【0006】 上記要件(1)(2)及び(3)を充足
せんとして、実公昭57−43798号公報には、難破
断橋絡部の周方向全体に渡って周方向に延びるスコア
(残留板厚を低減せしめる切込み加工線)を形成するこ
とが開示され、実公昭58−43568号公報には難破
断橋絡部に形成するスコアの周方向長さを難破断橋絡部
の周方向長さより幾分短くせしめて難破断橋絡部の周方
向両端部にスコアが形成されていない領域を残留せしめ
ることが開示され、実公平5−44297号公報には、
難破断橋絡部を開回転方向に見てその前端から周方向に
延びるスコアにおける残留板厚を後方に向かって漸次増
大せしめ、難破断橋絡部の後部にはスコアが形成されて
いない領域を残留せしめることが開示され、そして更に
特開平6−135449号公報には、難破断橋絡部に周
方向に間隔をおいて2個のスコアを配設することが開示
されている。
In order to satisfy the above requirements (1), (2) and (3), Japanese Utility Model Publication No. 57-43798 discloses a score (residual plate thickness) extending in the circumferential direction over the entire circumferential direction of the difficult-to-break bridge portion. It is disclosed that the cutting length of the score is reduced, and the length of the score formed in the difficult-to-break bridge portion in the circumferential direction is somewhat shorter than the circumferential length of the difficult-to-break bridge portion. It is disclosed that at least the areas where no score is formed are left at both circumferential ends of the difficult-to-break bridge portion, and in Japanese Utility Model Publication No. 5-44297,
It wrecked Broken Bridge junction the opening rotation as seen in the direction of the residual thickness of the score which extends from the front end in the circumferential direction toward the rear Shi gradually not increase because the region is not formed score the rear of the wrecked Broken Bridge junction Remaining is disclosed, and further, Japanese Patent Application Laid-Open No. 6-135449 discloses disposing two scores at intervals in the circumferential direction in the difficult-to-break bridge portion.

【0007】[0007]

【発明が解決しようとする問題】而して、近時において
は、所謂ごみの分別収集の点から、上記要件(1)
(2)及び(3)のうちでも特に(2)の要件が特に重
要視され、ガラス又は合成樹脂製容器の口頸部に金属製
容器蓋のピルファープルーフ裾部が残留せしめられるこ
とを確実に回避することが強く要求されている。それ故
に、上記実公昭57−43798号公報、実公昭58−
43568号公報、実公平5−44297号公報或いは
特開平6−135449号公報の開示に従って、周方向
弱化ラインにおける難破断橋絡部にスコアを形成してい
る形態の金属製容器においては、スコアにおける残留板
厚を増大せしめる及び/又はスコアの延在長さを低減せ
しめることによって、難破断橋絡部の破断強度を幾分増
大せしめ、かくして容器の口頸部を開封する際には、周
方向弱化ラインにおける易破断橋絡部は破断されるが難
破断橋絡部は破断されることなく確実に維持されるよう
になすことが意図される。然るに、難破断橋絡部の破断
強度を増大せしめると、必然的に容器の口頸部から容器
蓋を離脱せしめた後における難破断橋絡部の破断が困難
化し、本発明者の研究及び実験によれば、次のとおりの
解決すべき問題が発生することが判明した。即ち、容器
の口頸部から離脱された容器蓋における難破断橋絡部を
破断する際に、難破断橋絡部を介してスカート壁の主部
に接続されているピルファープルーフ裾部を、上方に或
いは水平な方向に引っ張る場合には、鋭い鋸歯形状等を
残留せしめることなく充分良好に難破断橋絡部を破断せ
しめてピルファープルーフ裾部をスカート壁の主部から
分離することができる。しかしながら、容器の口頸部か
ら離脱された容器蓋における難破断橋絡部を破断する際
に、難破断橋絡部を介してスカート壁の主部に接続され
ているピルファープルーフ裾部を下方に引っ張る(かよ
うな破断様式も消費者の挙動として散見されている)場
合、ピルーファープルーフ裾部をスカート壁の主部から
分離した時に、特に難破断橋絡部の(容器の口頸部から
容器蓋を離脱せしめる際の容器蓋の開回転方向に見て)
後端部に、スカート壁の主部から下方に鋸歯状に突出す
る鋭い破断跡が残留せしめられる傾向がある。
However, in recent years, from the viewpoint of so-called separated collection of refuse, the above requirement (1) has been taken.
Among the items (2) and (3), the requirement (2) is particularly emphasized, and it is ensured that the pill fur proof hem of the metal container lid remains in the mouth and neck of the glass or synthetic resin container. There is a strong demand to avoid it. Therefore, Japanese Utility Model Publication No. 57-43798 and Japanese Utility Model Publication No. 58-
According to the disclosure of Japanese Patent No. 43568, Japanese Utility Model Publication No. 5-44297, or Japanese Patent Application Laid-Open No. 6-135449, in a metal container in which a score is formed in a difficult-to-break bridge portion in a circumferential weakening line, the score remains. By increasing the plate thickness and / or decreasing the extension length of the score, the breaking strength of the difficult-to-break bridge portion is somewhat increased, and thus, when opening the mouth / neck portion of the container, a circumferential weakening line is used. It is intended to ensure that the easily breakable bridging portion in is broken but the hard-to-break bridging portion is maintained without being broken. However, increasing the breaking strength of the difficult-to-break bridge part inevitably makes it difficult to break the difficult-to-break bridge part after removing the container lid from the mouth-neck part of the container. Then, the following problems to be solved have been found to occur. That is, when breaking the difficult-to-break bridge part in the container lid separated from the mouth-neck part of the container, the pill fur-proof skirt connected to the main part of the skirt wall through the difficult-to-break bridge part is moved upward. or when Pulling the horizontal direction can be separated pilfer proof skirt portion brought sufficiently good breaking shipwrecked broken Bridge junction without allowed to remain sharp serrated shape from the main portion of the skirt wall. However, when breaking the difficult-to-break bridge part of the container lid that has been separated from the mouth and neck of the container, pull down the pill fur-proof hem connected to the main part of the skirt wall through the difficult-to-break bridge part. Tensioning (such a breakage pattern is also seen as a consumer behavior), especially when the pillow proof hem is separated from the main part of the skirt wall (e.g. (See the opening direction of the container lid when removing the lid)
At the rear end, there is a tendency to leave a sharp rupture mark protruding downward in a sawtooth shape from the main part of the skirt wall.

【0008】本発明は上記事実に鑑みてなされたもので
あり、その技術的課題は、容器の口頸部から離脱せしめ
た容器蓋における難破断橋絡部を破断せしめる際に、難
破断橋絡部を介してスカート壁の主部に接続されている
ピルファープルーフ裾部を下方に引っ張る場合にも、鋸
歯状に突出する鋭い破断跡を残留せしめることなくピル
ファープルーフ裾部がスカート壁の主部から分離せしめ
られ、上記要件(1)(2)及び(3)の全てが充分確
実に充足される、改良された金属製容器蓋を提供するこ
とである。
The present invention has been made in view of the above facts, and its technical problem is to eliminate a difficult-to-break bridge portion when breaking a difficult-to-break bridge portion in a container lid which is detached from the mouth and neck of the container. Even when pulling down the pill fur proof hem connected to the main part of the skirt wall via the pill fur proof hem from the main part of the skirt wall without leaving a sharp serrated break An object of the present invention is to provide an improved metal container lid which is separated and ensures that all the above requirements (1), (2) and (3) are satisfied.

【0009】[0009]

【課題を解決するための手段】本発明者等は、鋭意研究
及び実験の結果、驚くべきことに、従来の技術常識から
逸脱して、難破断橋絡部内にスコアを形成することに代
、周方向破断ラインの延在位置から上方(従って難
破断橋絡部自体よりも上方)に所定間隔をおいて、難破
断橋絡部に沿って延びるスコアを形成することによっ
て、上記技術的課題を達成することができることを見出
した。
The present inventors have SUMMARY OF THE INVENTION As a result of intensive research and experimentation, surprisingly, a departure from prior art common sense, instead of forming the score in the wrecked Broken Bridge junction, Above the extension of the circumferential break line (hence the difficulty
It has been found that the above technical problem can be achieved by forming a score extending along the difficult-to- break bridge portion at a predetermined interval above the broken bridge portion itself) .

【0010】 即ち、本発明によれば、上記技術的課題
を達成する金属製容器蓋として、天面壁と該天面壁の周
縁から垂下する筒状スカート壁とを具備し、該スカート
壁には周方向に延在する周方向弱化ラインが配設されて
いて、該スカート壁は該周方向弱化ラインよりも上方の
主部と該周方向弱化ラインよりも下方のピルファープル
ーフ裾部とに区画されており、該周方向弱化ラインは周
方向に間隔をおいて周方向に延びる複数個のスリットと
該スリット間に位置する複数個の橋絡部とから構成され
ており、該橋絡部は1個の難破断橋絡部と複数個の易破
断橋絡部とを含み、該難破断橋絡部の周方向長さは該易
破断橋絡部の周方向長さよりも長く、該ピルファープル
ーフ裾部には開回転方向に見て該難破断橋絡部の直後方
に位置するスリットから軸線方向下方に延びる軸線方向
弱化ラインが配設されている、ピルファープルーフ特性
を有する金属製容器蓋において、該周方向破断ラインの
延在位置よりも上方を、該難破断橋絡部に沿って延びる
スコアが形成されており、該周方向破断ラインにおける
該スリットと該スコアとの軸線方向間隔D1は0.05
乃至0.35mmである、ことを特徴とする金属製容器
蓋が提供される。
That is, according to the present invention, as a metal container lid that achieves the above-mentioned technical problems, a top wall and a cylindrical skirt wall that hangs from the peripheral edge of the top wall are provided, and the skirt wall has a peripheral wall. have been arranged in the circumferential direction weakening line extending in a direction, the skirt wall on the pilfer-proof bottom portion below the upper main portion and a peripheral direction weakening line than the circumferential direction weakening line The circumferential weakening line is composed of a plurality of slits extending in the circumferential direction at intervals in the circumferential direction and a plurality of bridging portions located between the slits. Includes one difficult-to-break bridge portion and a plurality of easily-breakable bridge portions, the circumferential length of the difficult-to-break bridge portion being longer than the circumferential length of the easily-breakable bridge portion, and the pill fur proof. The hem has a slit located immediately behind the difficult-to-break bridge portion when viewed in the opening rotation direction. In a metal container lid having a pill fur proof characteristic, in which an axial weakening line extending axially downward from is disposed, above the extending position of the circumferential breaking line, along the difficult to break bridge portion. A score extending in the circumferential direction is formed in the circumferential breaking line.
The axial distance D1 between the slit and the score is 0.05.
A metal container lid is provided, wherein the metal container lid is from 0.35 mm to 0.35 mm .

【0011】 厚が0.210乃至0.250mmで
あるアルミニウム基合金から容器蓋が形成されている場
合、該スコアは周方向に連続して延びており、該スコア
の残留板厚RTは0.180乃至0.220mmである
のが好都合である。該難破断橋絡部の周方向長さL4は
2.50乃至5.00mmであり、該開回転方向に見て
該スコアの前端と該難破断橋絡部の前側に位置する該ス
リットの後端との周方向間隔D2は0.20mm以下乃
至該スコアの前端は該難破断橋絡部の直前側に位置する
該スリットの後端よりも前方に位置し、該スコアの後端
と該難破断橋絡部の後側に位置するスリットの前端との
周方向間隔D3は0.50乃至1.50mmであるのが
好ましい。
When the container lid is formed of an aluminum-based alloy having a plate thickness of 0.210 to 0.250 mm, the score extends continuously in the circumferential direction, and the residual plate thickness RT of the score is 0. Advantageously, it is between .180 and 0.220 mm. The length L4 in the circumferential direction of the difficult-to-break bridge portion is 2.50 to 5.00 mm, and the front end of the score and the rear end of the slit located on the front side of the hard-to-break bridge portion are seen in the opening rotation direction. The circumferential distance D2 is 0.20 mm or less, the front end of the score is located in front of the rear end of the slit located immediately before the difficult-to-break bridge portion, and the score rear end and the hard-to-break bridge portion are located. The circumferential distance D3 from the front end of the slit located on the rear side is preferably 0.50 to 1.50 mm.

【0012】[0012]

【作用】本発明の金属製容器蓋においては、周方向弱化
ラインの延在位置から上方にずらしてスコアが形成され
ている故に、容器の口頸部を開封する際に難破断橋絡部
及びその近傍が破断されてピルファープルーフ裾部がス
カート壁から分離されてしまうことが充分確実に回避さ
れる。そして、容器の口頸部から容器蓋を離脱せしめた
後においては、その理論的理由は必ずしも明白ではない
が、ピルファープルーフ裾部を下方に引っ張った場合で
も、鋸歯状に突出する鋭い破断跡を残留せしめることな
く、ピルフアープルーフ裾部をスカート壁の主部から分
離することができる。
In the metal container lid of the present invention, since the score is formed by shifting upward from the extended position of the circumferential weakening line, the difficult-to-break bridge portion and its part when opening the mouth and neck of the container It is sufficiently prevented that the pilfer proof hem is separated from the skirt wall by breaking the vicinity. And after removing the container lid from the mouth and neck of the container, the theoretical reason is not always clear, but even when the pill fur proof hem is pulled downward, a sharp rupture mark protruding in a sawtooth shape. The Pilfer proof hem can be separated from the main part of the skirt wall without leaving any residue.

【0013】[0013]

【実施例】以下、本発明の好適実施例について、添付図
面を参照して更に詳細に説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in more detail with reference to the accompanying drawings.

【0014】図1を参照して説明すると、全体を番号2
で示す容器蓋は、ピルファープルーフ特性を有する金属
製容器蓋の材料として広く一般に使用されている、板厚
が0.210mm乃至0.250mm程度であるアムミ
ニウム基合金薄板であるのが好都合である金属薄板から
周知の方式で形成することができる。かかる容器蓋2
は、円形天面壁4とこの天面壁4の周縁から垂下する円
筒状スカート壁6とを有する。スカート壁6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8が存
在し、かかる膨出部8に周方向に延在する周方向弱化ラ
イン10が形成されている。かかる周方向弱化ライン1
0はスカート壁6をそれより上方の主部12とそれより
下方のピルファープルーフ裾部14とに区画している。
周方向弱化ライン10自体は、周方向に間隔をおいて延
びる複数個のスリット16及び18と、隣接するスリッ
ト16及び18間に位置する複数個の橋絡部20及び2
2とから構成されている。複数個のスリット16及び1
8は周方向長さが比較的短い1個の短スリット18を含
んでおり、この1個の短スリット以外は周方向長さが比
較的長い通常スリット16である。一方、複数個の橋絡
部20及び22は周方向長さが比較的長い1個の難破断
橋絡部22を含んでおり、この1個の難破断橋絡部22
以外は周方向長さが比較的短い易破断橋絡部20であ
る。矢印24で示す開回転方向に見て(本明細書におい
て、特に方向に言及することなく語句「前」或いは
「後」を使用する場合には、この開回転方向における前
或いは後を意味する)、難破断橋絡部22は短スリット
18の直前方に位置せしめられている。通常スリット1
6の周方向長さL1は8.00mm乃至12.00mm
程度であり、短スリット18の周方向長さL2は2.0
0mm乃至2.50mm程度であるのが好都合である。
易破断橋絡部20の周方向長さL3は0.70mm乃至
1.00mm程度であるのが好都合であり、難破断橋絡
部22の周方向長さL4は2.50mm乃至5.00m
m程度であるのが好ましい。図2を参照することによっ
て容易に理解される如く、周方向破断ライン10におけ
るスリット16及び18の各々は、その上方部とその下
方部とを半径方向に変位せしめることによって形成され
ており、その周方向両端部においてはその上方部とその
下方部との半径方向変位量が易破断橋絡部20及び難破
断橋絡部22に向けて漸次減少せしめられているのが好
適である(スリット16及び18の形成及び構成等につ
いては、本出願人の出願にかかる平成3年特許願第11
2245号の明細書及び図面を参照されたい)。
Referring to FIG. 1, reference numeral 2 is used as a whole.
The container lid indicated by is preferably an amminium-based alloy thin plate having a plate thickness of about 0.210 mm to 0.250 mm, which is widely and widely used as a material for a metal container cover having pill fur proof characteristics. It can be formed from a thin metal plate by a known method. Such container lid 2
Has a circular top wall 4 and a cylindrical skirt wall 6 depending from the peripheral edge of the top wall 4. At the lower part of the skirt wall 6, there is an annular bulging portion 8 which is bulged slightly outward in the radial direction, and a circumferential weakening line 10 extending in the circumferential direction is formed in the bulging portion 8. . This circumferential weakening line 1
0 divides the skirt wall 6 into a main portion 12 above it and a pilfer proof skirt 14 below it.
The circumferential weakening line 10 itself includes a plurality of slits 16 and 18 extending at intervals in the circumferential direction and a plurality of bridging portions 20 and 2 located between the adjacent slits 16 and 18.
2 and. A plurality of slits 16 and 1
Reference numeral 8 includes one short slit 18 having a relatively short circumferential length, and other than this one short slit, it is a normal slit 16 having a relatively long circumferential length. On the other hand, the plurality of bridging portions 20 and 22 include one difficult-to-break bridging portion 22 having a relatively long circumferential length.
Other than the above, the easily breakable bridging portion 20 has a relatively short circumferential length. Seen in the direction of open rotation indicated by arrow 24 (in this specification, when the phrase "front" or "rear" is used without any particular reference to the direction, it means front or rear in this direction of open rotation). The difficult-to-break bridge portion 22 is located immediately in front of the short slit 18. Normal slit 1
6 has a circumferential length L1 of 8.00 mm to 12.00 mm.
And the circumferential length L2 of the short slit 18 is 2.0.
Advantageously, it is of the order of 0 mm to 2.50 mm.
The circumferential length L3 of the easily breakable bridging portion 20 is conveniently about 0.70 mm to 1.00 mm, and the circumferential length L4 of the difficult to break bridging portion 22 is 2.50 mm to 5.00 m.
It is preferably about m. As will be readily understood by referring to FIG. 2, each of the slits 16 and 18 in the circumferential break line 10 is formed by radially displacing its upper portion and its lower portion, At both circumferential ends, it is preferable that the radial displacement between the upper portion and the lower portion thereof is gradually reduced toward the easily breakable bridging portion 20 and the hard to break bridging portion 22 (slits 16 and Regarding the formation and constitution of 18, etc., the 1991 patent application No. 11
See the specification and drawings of No. 2245).

【0015】図1を参照して説明を続けると、ピルファ
ープルーフ裾部14には、上記短スリット18、好まし
くはこの短スリット18の開回転方向前端から、下方に
延在する軸線方向弱化ライン26が形成されている。こ
の軸線方向弱化ライン26は短スリット18から下方に
ピルファープルーフ裾部14の下端近傍まで延びている
スコア(即ち材料厚さを低減せしめることによって形成
される弱化部)28を含んでいる。このスコア28の下
端からピルファープルーフ裾部14の下端までの若干の
長さの抵抗部30においては特に加工が施されておらず
スコアが全く存在しない。上記スコア28における上記
膨出部8を延在する部分においては、残留板厚は0.1
00mm乃至0.150mm程度であり、上記スコア2
8における上記膨出部8よりも下方を延在する部分にお
いては、残留板厚は0.140mm乃至0.160mm
程度であるのが好都合である。上記抵抗部30の軸線方
向長さL5(図2)は0.35mm乃至0.45mm程
度であるのが好都合である。
Continuing the description with reference to FIG. 1, the pill fur proof skirt 14 has an axial weakening line extending downward from the short slit 18, preferably from the front end of the short slit 18 in the rotational direction of opening. 26 is formed. The axial weakening line 26 includes a score (ie, a weakened portion formed by reducing the material thickness) 28 extending downward from the short slit 18 to near the lower end of the pill fur proof skirt 14. The resistance portion 30 having a slight length from the lower end of the score 28 to the lower end of the pill fur proof hem 14 is not particularly processed and has no score at all. In the portion of the score 28 extending the bulging portion 8, the residual plate thickness is 0.1.
It is about 00 mm to 0.150 mm, and the above score 2
In the portion extending below the bulging portion 8 in No. 8, the residual plate thickness is 0.140 mm to 0.160 mm.
Conveniently it is about. The axial length L5 (FIG. 2) of the resistor portion 30 is conveniently about 0.35 mm to 0.45 mm.

【0016】図1に示す如く、スカート壁6の主部12
の上端部には滑り防止用凹凸形状部32が形成されてい
る。また、この凹凸形状部32の直下方には環状溝部3
4が形成されている。天面壁4の内面には適宜の合成樹
脂から成形することができる密封ライナー36が配設さ
れており、この密封ライナー36の下面周縁部には2条
の同心状密封突条を有する環状密封部38が形成されて
いる。
As shown in FIG. 1, the main portion 12 of the skirt wall 6
A slip prevention uneven portion 32 is formed at the upper end of the. The annular groove portion 3 is provided immediately below the uneven portion 32.
4 are formed. A sealing liner 36, which can be molded from an appropriate synthetic resin, is provided on the inner surface of the top wall 4, and an annular sealing portion having two concentric sealing projections is provided on the peripheral edge of the lower surface of the sealing liner 36. 38 is formed.

【0017】 図1と共に図2及び図3を参照して説明
を続けると、本発明に従って構成された容器蓋2におい
ては、周方向破断ライン10の延在位置よりも上方を、
難破断橋絡部22に沿って延びるスコア40が形成され
ていることが重要である。そして、かかるスコア40と
周方向弱化ライン10におけるスリット16及び18と
の軸線方向間隔、即ちスリット16及び18の軸線方向
上縁とスコア40の軸線方向下縁との軸線方向間隔D1
は0.05乃至0.35mmであることが重要である
間隔D1が過大になると、後に更に詳述する如くにして
容器の口頸部から容器蓋2を離脱せしめた後に難破断橋
絡部22近傍を破断せしめてピルファープルーフ裾部1
4をスカート壁6の主部12から分離する際の破断必要
力が過大になる傾向が発生する。逆に間隔D1が過少に
なると、容器の口頸部から容器蓋2を離脱せしめて口頸
部を開封する際に、難破断橋絡部22近傍が破断されて
しまってピルファープルーフ裾部14がスカート壁6か
ら分離されてしまう(かくすると、ピルファープルーフ
裾部14が容器の口頸部から離脱されずに残留してしま
う)傾向が生成され、そしてまたピルファープルーフ裾
部14を下方に引っ張ってスカート壁6の主部12から
ピルファープルーフ裾部14を分離する場合に、図6に
二点鎖線で図示する如く、スカート壁6の主部12から
鋸歯状に下方に突出する破断跡が生成せしめられる傾向
が発生する。スコア40におけるアルミニウム基合金の
残留厚さRTは0.180乃至0.220mmであるの
が好都合である。残留厚さRTが過大になると、ピルフ
ァープルーフ裾部14をスカート壁6の主部12から分
離する際の破断必要力が過大になり、逆に残留厚さRT
が過少になると、容器の口頸部から容器蓋2を離脱せし
めて口頸部を開封する際に、難破断橋絡部22近傍が破
断されてしまってピルファープルーフ裾部14がスカー
ト壁6から分離されてしまう傾向が生成される。スコア
40自体の幅Wは0.1mm程度でよい。スコア40の
前端と難破断橋絡部22の直前側に位置するスリット1
6の後端との関係は、スコア40の後端とスリット16
の後端との間隔D2が0.20mm以下乃至スコア40
の前端がスリット16の後端よりも前方に位置するのが
好適である(図示の実施例においては、スコア40の前
端がスリット16の後端よりも前方に位置せしめられて
おり、上記周方向間隔D2は負数である)。周方向間隔
D2が過大(即ち過大正数)になると、ピルファープル
ーフ裾部14をスカート壁6の主部12から分離する際
の破断必要力が過大になる。スコア40の後端と難破断
橋絡部22の直後側に位置するスリット18の前端との
関係については、両者の周方向間隔D3が0.50乃至
1.50mm程度に設定されているのが好適である。周
方向間隔D3が過大になると、ピルファープルーフ裾部
14をスカート壁6の主部12から分離する際に破断必
要力が過大になる傾向が生成される。逆に周方向間隔D
3が過少になると、容器の口頸部から容器蓋2を離脱せ
しめて口頸部を開封する際に、難破断橋絡部22近傍が
破断されてしまってピルファープルーフ裾部14がスカ
ート壁6から分離されてしまう傾向が発生する。図示の
実施例においては周方向に連続して延びる1本のスコア
40が形成されているが、所望ならばスコア40の適宜
の部位に中断部を存在せしめることもできる。
Continuing the description with reference to FIGS. 2 and 3 together with FIG. 1, in the container lid 2 configured according to the present invention, the container lid 2 is located above the extending position of the circumferential break line 10.
It is important that the score 40 extending along the hard-to-break bridge portion 22 is formed. Then, the axial distance between the score 40 and the slits 16 and 18 in the circumferential weakening line 10, that is, the axial distance D1 between the axial upper edge of the slits 16 and 18 and the axial lower edge of the score 40.
Is importantly between 0.05 and 0.35 mm.
When the distance D1 becomes excessive, the container lid 2 is detached from the mouth and neck of the container as described in more detail later, and then the vicinity of the difficult-to-break bridge portion 22 is broken to make the pill fur proof hem 1
There is a tendency that the force required for breaking when separating 4 from the main portion 12 of the skirt wall 6 becomes excessive. On the contrary, if the distance D1 is too small, when the container lid 2 is detached from the mouth and neck of the container to open the mouth and neck, the vicinity of the difficult-to-break bridge portion 22 is broken and the pill fur proof hem 14 is removed. A tendency is created to separate from the skirt wall 6 (so that the pill fur proof skirt 14 remains undisengaged from the mouth and neck of the container), and also to move the pill fur proof skirt 14 down. When the pill fur proof skirt 14 is separated from the main portion 12 of the skirt wall 6 by pulling, a rupture mark protruding downward from the main portion 12 of the skirt wall 6 in a sawtooth shape as shown by a two-dot chain line in FIG. Tend to be generated. The residual thickness RT of the aluminum-based alloy at score 40 is conveniently between 0.180 and 0.220 mm. If the residual thickness RT is excessively large, the required breaking force for separating the pill fur-proof skirt 14 from the main portion 12 of the skirt wall 6 becomes excessive, and conversely, the residual thickness RT is large.
When the container lid 2 is detached from the mouth and neck of the container and the mouth and neck are opened, the vicinity of the difficult-to-break bridge portion 22 is broken and the pilfer proof hem 14 is separated from the skirt wall 6 when the amount is too small. A tendency to be separated is created. The width W of the score 40 itself may be about 0.1 mm. The slit 1 located at the front end of the score 40 and immediately in front of the difficult-to-break bridge portion 22.
The relationship with the rear end of 6 is that the rear end of the score 40 and the slit 16
The distance D2 from the rear end is 0.20 mm or less or score 40.
It is preferable that the front end of the score 40 is located in front of the rear end of the slit 16 (in the illustrated embodiment, the front end of the score 40 is located in front of the rear end of the slit 16 in the circumferential direction). Interval D2 is a negative number). When the circumferential distance D2 is excessively large (that is, an excessively large positive number), the breaking required force for separating the pilfer proof skirt 14 from the main portion 12 of the skirt wall 6 becomes excessively large. Regarding the relationship between the rear end of the score 40 and the front end of the slit 18 located immediately behind the hard-to-break bridge portion 22, it is preferable that the circumferential distance D3 between them is set to about 0.50 to 1.50 mm. Is. Excessive circumferential spacing D3 creates a tendency for the required break force to be too great when separating the pilfer proof skirt 14 from the main portion 12 of the skirt wall 6. Conversely, the circumferential distance D
When 3 is too small, when the container lid 2 is detached from the mouth and neck of the container and the mouth and neck is opened, the vicinity of the difficult-to-break bridge portion 22 is broken and the pilfer proof hem portion 14 becomes the skirt wall 6. There is a tendency to be separated from. In the illustrated embodiment, one score 40 extending continuously in the circumferential direction is formed, but if desired, an interruption portion may be provided at an appropriate portion of the score 40.

【0018】図4は図1に示す容器蓋2を容器の口頸部
に適用した状態を図示している。ガラス又は適宜の合成
樹脂から形成することができる容器の口頸部48は略円
筒形状であり、その外周面には雄螺条50とこの雄螺条
50の下方に位置する係止あご部52が形成されてい
る。口頸部48に容器蓋2を装着して口頸部48を密封
するには、従来の容器蓋と全く同様に、口頸部48に容
器蓋2を被嵌し、容器蓋2の天面壁4の外面に押圧力を
加えて密封ライナー36の環状密封部38を口頸部48
の上端部に密接せしめる。そして、かかる状態を維持し
ながら、口頸部48の雄螺条50に沿って容器蓋2のス
カート壁6の主部12に、更に詳しくは環状溝部34
(図1)よりも下方の領域に雌螺条54を形成する。加
えて、ピルファープルーフ裾部14の下端部を半径方向
内側に折り曲げて、口頸部48の係止あご部52に係止
せしめる。
FIG. 4 shows a state in which the container lid 2 shown in FIG. 1 is applied to the mouth and neck of the container. The container neck 48, which can be made of glass or a suitable synthetic resin, has a substantially cylindrical shape, and has a male screw 50 and a locking jaw 52 located below the male screw 50 on the outer peripheral surface thereof. Are formed. To attach the container lid 2 to the mouth / neck portion 48 and seal the mouth / neck portion 48, the container lid 2 is fitted onto the mouth / neck portion 48 in the same manner as the conventional container lid, and the top wall of the container lid 2 is fitted. 4, the annular sealing portion 38 of the sealing liner 36 is pressed against the outer surface of
Place it close to the upper edge of the. While maintaining such a state, the main groove 12 of the skirt wall 6 of the container lid 2 along the male screw thread 50 of the mouth / neck portion 48, more specifically, the annular groove portion 34.
Female threads 54 are formed in a region below (FIG. 1). In addition, the lower end of the pill fur proof skirt 14 is bent inward in the radial direction and locked to the locking jaw 52 of the mouth / neck 48.

【0019】容器の口頸部48を開封するためには、容
器蓋2を矢印24で示す開回転方向、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50と雌螺条54との協働により容器蓋2は回転
と共に上昇せしめられる。然るに、ピルファープルーフ
裾部14は、その下端部が係止あご部52に係止されて
いる故に、自由に上昇することができず、かくして周方
向弱化ライン10及び軸線方向弱化ライン26に相当な
応力が生成される。そして、かかる応力に起因して、周
方向弱化ライン10においては易破断橋絡部20が破断
される。しかしながら、難破断橋絡部22は破断するこ
となく確実に維持され続ける。軸線方向弱化ライン26
においては、その上端からスコア28に沿って破断が進
行し、次いで抵抗部30も破断される。かくして、無端
環形状であったピルファープルーフ裾部14が図5に二
点鎖線で示すとおりの有端帯形状に展開される。しかる
後においては、容器蓋2の全体が回転と共に自由に上昇
せしめられて口頸部48から離脱され、かくして口頸部
48が開放される。
In order to open the mouth / neck portion 48 of the container, the container lid 2 is rotated in the opening rotation direction indicated by the arrow 24, that is, in the counterclockwise direction when viewed from above in FIG. That way,
The container lid 2 is raised with the rotation by the cooperation of the male screw 50 and the female screw 54. However, since the lower end of the pill fur proof skirt 14 is locked by the locking chin 52, it cannot be lifted freely and thus corresponds to the circumferential weakening line 10 and the axial weakening line 26. Stress is generated. Then, due to the stress, the easily breakable bridging portion 20 is broken in the circumferential weakening line 10. However, the difficult-to-break bridge portion 22 is surely maintained without breaking. Axial weakening line 26
In, the fracture progresses along the score 28 from the upper end thereof, and then the resistance portion 30 also fractures. Thus, the endless ring-shaped pill fur proof skirt 14 is developed into the endless belt shape as shown by the chain double-dashed line in FIG. After that, the entire container lid 2 is freely raised with rotation and separated from the mouth / neck portion 48, and thus the mouth / neck portion 48 is opened.

【0020】一旦開封した容器の口頸部48を容器蓋2
によって一時的に仮密封することが望まれる場合には、
ピルファープルーフ裾部14を引っ張って、容器蓋2か
らピルファープルーフ裾部14を切り離す。この際に
は、図3と共に図6を参照することによって理解される
如く、難破断橋絡部22の直前側に位置するスリット1
6の後端から後方及び上方に向けて破断が進行してスコ
ア40に至り、スコア40に沿って後方に破断が進み、
そして更にスコア40の後端から後方及び下方に破断が
進行して、難破断橋絡部22の直後方に位置するスリッ
ト18に至り、かくしてピルファープルーフ裾部14が
スカート壁6の主部12から分離される。本発明に従っ
て構成された容器蓋2においては、スコア40が周方向
破断ライン10の延在位置よりも上方に位置せしめられ
ていることに起因して、ピルファープルーフ裾部14を
スカート壁6の主部12から分離する際にピルファープ
ルーフ裾部14を上方乃至水平方向ではなくて下方に引
っ張った場合でも、スコア40の後端からスリット18
の前端に向けて、後方に向かって下方に傾斜して破断が
円滑に進行し、それ故に、図6に二点鎖線で示すとおり
に鋸歯状に突出する破断跡を生成せしめることなく、ピ
ルファプルーフ裾部14をスカート壁6の主部12から
充分良好に分離することができる。しかる後において
は、ピルファープルーフ裾部14が切り離された容器蓋
2を容器の口頸部48に被嵌し、容器蓋2の雌螺条54
を口頸部48の雄螺条50に螺合せしめる。
The mouth / neck portion 48 of the container once opened is attached to the container lid 2.
If it is desired to temporarily seal with
Pull the pill fur proof hem 14 to separate the pill fur proof hem 14 from the container lid 2. At this time, as will be understood by referring to FIG. 6 together with FIG. 3, the slit 1 located immediately in front of the difficult-to-break bridge portion 22.
The rupture progresses from the rear end of 6 toward the rear and the upper side to reach the score 40, and the rupture progresses rearward along the score 40,
Then, the fracture further progresses rearward and downward from the rear end of the score 40 to reach the slit 18 located immediately behind the difficult-to-break bridge portion 22, and thus the pilfer proof hem portion 14 is separated from the main portion 12 of the skirt wall 6. To be separated. In the container lid 2 constructed according to the present invention, the pill fur proof hem 14 is attached to the skirt wall 6 due to the score 40 being located above the extending position of the circumferential break line 10. Even when the pill fur proof skirt 14 is pulled downward rather than upward or horizontally when separating from the main portion 12, the slit 18 is formed from the rear end of the score 40.
The rupture proceeds smoothly by inclining downward toward the front end toward the rear end of the ridge, and therefore, without causing a rupture trace protruding in a sawtooth shape as shown by a chain double-dashed line in FIG. The proof skirt 14 can be separated sufficiently well from the main part 12 of the skirt wall 6. After that, the container lid 2 from which the pill fur proof hem 14 has been cut off is fitted to the mouth / neck portion 48 of the container, and the female thread 54 of the container lid 2 is attached.
Is screwed onto the male thread 50 of the mouth / neck portion 48.

【0021】実験例 厚さ0.23mmのアルミニウム基合金薄板(JIS規
格3105)を使用して、図1乃至図3に示すとおりの
形態で呼び外径が28mmである容器蓋を形成した。各
部の寸法は下記のとおりであった。密封ライナーは天面
壁の内面においてポリエチレンを型押成形することによ
って形成した。 通常スリットの周方向長さL1: 10.00mm 短スリットの周方向長さL2: 2.20mm 易破断橋絡部の周方向長さL3: 0.80mm 難破断橋絡部の周方向長さL4: 3.45mm 軸線方向弱化ラインの長さ: 3.80mm 軸線方向弱化ラインの抵抗部長さL5: 0.40mm 軸線方向弱化ラインのスコア残留板厚: 0.130mm (膨出部) 0.150mm (膨出部以下) 難破断橋絡部に沿って延びるスコアの 周方向長さ 2.45mm 難破断橋絡部に沿って延びるスコアの 残留板厚さ 0.20mm 難破断橋絡部に沿って延びるスコアの幅 0.10mm スコアとスリットとの周方向間隔D2 −0.30mm スコアとスリットとの周方向間隔D3 1.00mm
Experimental Example Using an aluminum-based alloy thin plate (JIS standard 3105) having a thickness of 0.23 mm, a container lid having a nominal outer diameter of 28 mm was formed as shown in FIGS. 1 to 3. The dimensions of each part were as follows. The sealing liner was formed by embossing polyethylene on the inner surface of the top wall. Ordinary slit circumferential length L1: 10.00 mm Short slit circumferential direction L2: 2.20 mm Easily breakable bridging section circumferential length L3: 0.80 mm Difficult-to-break bridging section circumferential length L4: 3.45 mm Length of axial weakening line: 3.80 mm Length of resistance portion of axial weakening line L5: 0.40 mm Score of axial weakening line Residual plate thickness: 0.130 mm (bulging portion) 0.150 mm (bulging) Outward part) Circumferential length of the score extending along the difficult-to-break bridge portion 2.45 mm Residual plate thickness of the score extending along the difficult-to-break bridge portion 0.20 mm Width of score extending along the difficult-to-break bridge portion 0 10 mm Score-slit-circumferential-direction gap D2-0.30 mm Score-slit-slit circumferential-direction gap D3 1.00 mm

【0022】ガラス製瓶の図4に示すとおりの形態であ
る口頸部に上記容器蓋を図4を参照して説明したとおり
の様式で装着した。次いで、図4を参照して説明したと
おりの様式で容器の口頸部を開封した。そして更に、容
器の口頸部から離脱せしめた容器蓋において、有端帯形
状のピルファープルーフ裾部を単に軸線方向下方に引っ
張ることのみによって、ピルファープルーフ裾部をスカ
ート壁の主部から分離した。50個の容器蓋についてか
ような操作を遂行して、開封の際にピルファープルーフ
裾部が口頸部に残留した(難破断橋絡部ライン乃至その
近傍が破断され、軸線方向弱化ラインが破断されなかっ
た)か否か、ピルファープルーフ裾部の分離によって鋸
歯状に突出する破断跡が発生したか否かを調査したとこ
ろ、開封の際のピルファープルーフ裾部の残留は零であ
り、鋸歯状に突出する破断跡の生成も零であった。
The above-mentioned container lid was attached to the mouth and neck of the glass bottle in the form shown in FIG. 4 in the manner described with reference to FIG. The container neck was then opened in the manner described with reference to FIG. Furthermore, in the container lid that is detached from the mouth and neck of the container, the pilfer proof hem is separated from the main part of the skirt wall simply by pulling the end-belt-shaped pill fur proof hem downward in the axial direction. did. After carrying out such an operation for 50 container lids, the pill fur proof hem remained at the mouth and neck when opening (breaking bridging line line or its vicinity was broken, axial weakening line was broken) It was investigated whether or not a rupture mark protruding in a sawtooth shape was generated due to the separation of the pilfer proof hem, and there was no residue of the pill fur proof hem at the time of opening, The generation of fracture marks protruding in a sawtooth shape was also zero.

【0023】[0023]

【発明の効果】本発明に従って構成された容器蓋によれ
ば、(1)容器の口頸部に容器蓋を装着する際に周方向
弱化ライン及び軸線方向弱化ラインの部分的破断の発生
を回避し、(2)容器の口頸部を開封する際には周方向
弱化ラインにおける難破断橋絡部乃至その近傍を破断せ
しめることなく維持して軸線方向弱化ラインを破断して
ピルファープルーフ裾部を有端帯形状に展開し、(3)
開封の後に、鋭い鋸歯状破断跡を発生せしめることなく
充分容易且つ円滑に破断することができる、という要件
を充分確実に充足することができる。
According to the container lid constructed according to the present invention, (1) occurrence of partial breakage of the circumferential weakening line and the axial weakening line when the container lid is attached to the mouth and neck of the container. (2) When opening the mouth and neck of the container, the axial weakening line is broken and the pilfer proof hem is broken by maintaining the brittle portion in the circumferential weakening line or its vicinity without breaking. Expanded into an endless belt, (3)
After opening, it is possible to satisfy the requirement of being able to satisfactorily and smoothly rupture without generating sharp sawtooth rupture marks.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に従って構成された容器蓋の好適実施例
を、一部を断面で示す側面図。
FIG. 1 is a side view, partly in section, of a preferred embodiment of a container lid constructed in accordance with the present invention.

【図2】図1の容器蓋の一部(難破断橋絡部近傍)を拡
大して示す部分斜面図。
FIG. 2 is a partial perspective view showing a part of the container lid of FIG. 1 (near the difficult-to-break bridge portion) in an enlarged manner.

【図3】図1の容器蓋の一部(難破断橋絡部近傍)を更
に拡大して示す部分斜面図。
FIG. 3 is a partial perspective view showing a part of the container lid of FIG. 1 (in the vicinity of the difficult-to-break bridge portion) in a further enlarged manner.

【図4】図1の容器蓋を容器の口頸部に装着した状態
を、一部を断面で示す側面図。
FIG. 4 is a side view, partly in section, showing a state in which the container lid of FIG. 1 is attached to the mouth and neck of the container.

【図5】図1の容器蓋を容器の口頸部から離脱せしめた
状態で示す側面図。
FIG. 5 is a side view showing the container lid of FIG. 1 in a state where the container lid is detached from the mouth and neck of the container.

【図6】図1の容器蓋を容器の口頸部から離脱せしめた
後に、ピルファープルーフ裾部を下方に引っ張ってスカ
ート壁の主部から分離した状態の一部(難破断橋絡部近
傍)を拡大して示す部分拡大図。
6 is a part of the state in which the pill fur proof hem is pulled downward and separated from the main part of the skirt wall after the container lid of FIG. 1 is detached from the mouth and neck of the container (near the difficult-to-break bridge portion). The elements on larger scale which expand and show.

【符号の説明】[Explanation of symbols]

2:容器蓋 4:天面壁 6:スカート壁 10:周方向弱化ライン 12:スカート壁の主部 14:ピルファープルーフ裾部 16:通常スリット 18:短スリット 20:易破断橋絡部 22:難破断橋絡部 24:開回転方向 26:軸線方向弱化ライン 28:(軸線方向破断ラインにおける)スコア 30:抵抗部 36:密封ライナー 40:(難破断橋絡部に沿って延びる)スコア 48:容器の口頸部 2: Container lid 4: Top wall 6: Skirt wall 10: Circumferential weakening line 12: Main part of skirt wall 14: Pilfer proof hem 16: Normal slit 18: Short slit 20: Easy breaking bridge 22: Difficult fracture bridge part 24: Open rotation direction 26: Axial weakening line 28: Score (at axial break line) 30: Resistance part 36: Sealed liner 40: Score (extending along the difficult-to-break bridge portion) 48: Mouth and neck of container

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 天面壁と該天面壁の周縁から垂下する筒
状スカート壁とを具備し、該スカート壁には周方向に延
在する周方向弱化ラインが配設されていて、該スカート
壁は該周方向弱化ラインよりも上方の主部と該周方向弱
化ラインよりも下方のピルファープルーフ裾部とに区画
されており、該周方向弱化ライン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と該スリット間に位
置する複数個の橋絡部とから構成されており、該橋絡部
は1個の難破断橋絡部と複数個の易破断橋絡部とを含
み、該難破断橋絡部の周方向長さは該易破断橋絡部の周
方向長さよりも長く、該ピルファープルーフ裾部には開
回転方向に見て該難破断橋絡部の直後方に位置するスリ
ットから軸線方向下方に延びる軸線方向弱化ラインが配
設されている、ピルファープルーフ特性を有する金属製
容器蓋において、該周方向破断ラインの延在位置よりも
上方を、該難破断橋絡部に沿って延びるスコアが形成さ
れており、該周方向破断ラインにおける該スリットと該
スコアとの軸線方向間隔D1は0.05乃至0.35m
mである、ことを特徴とする金属製容器蓋。
1. A top wall and a tubular skirt wall hanging down from the peripheral edge of the top wall, and a circumferential weakening line extending in the circumferential direction is arranged on the skirt wall. is partitioned into a pilfer-proof skirt below the upper main portion and a peripheral direction lines of weakness than the circumferential direction weakening line, the direction circumferential circumferential direction weakening line at intervals in the circumferential direction And a plurality of bridging portions located between the slits, the bridging portion including one difficult-breaking bridging portion and a plurality of easily-breaking bridging portions. , The circumferential length of the difficult-to-break bridge portion is longer than the circumferential length of the easily-to-break bridge portion, and the pilfer proof hem is positioned immediately after the difficult-to-break bridge portion when viewed in the opening rotation direction. Pilf is provided with an axial weakening line extending axially downward from the slit. In a metal container lid having a roof-proof property, a score extending above the extending position of the circumferential breaking line is formed along the difficult-to-break bridging portion, and the slit and the slit in the circumferential breaking line are formed.
The axial distance D1 from the score is 0.05 to 0.35 m
m is a metal container lid.
【請求項2】 板厚が0.210乃至0.250mmで
あるアルミニウム基合金から形成されており、該スコア
は周方向に連続して延びており、該スコアの残留板厚R
Tは0.180乃至0.220mmである、請求項
載の金属製容器蓋。
2. The aluminum-based alloy having a plate thickness of 0.210 to 0.250 mm, the score extending continuously in the circumferential direction, and the residual plate thickness R of the score.
T is 0.180 to 0.220 mm, metallic container closure according to claim 1, wherein.
【請求項3】 該難破断橋絡部の周方向長さL4は2.
50乃至5.00mmであり、該開回転方向に見て該ス
コアの前端と該難破断橋絡部の直前側に位置する該スリ
ットの後端との周方向間隔D2は0.20mm以下乃至
該スコアの前端は該難破断橋絡部の直前側に位置する該
スリットの後端よりも前方に位置し、該スコアの後端と
該難破断橋絡部の後側に位置するスリットの前端との周
方向間隔D3は0.50乃至1.50mmである、請求
1又は2記載の金属製容器蓋。
3. The circumferential length L4 of the difficult-to-break bridge portion is 2.
50 to 5.00 mm, and the circumferential distance D2 between the front end of the score and the rear end of the slit located immediately before the difficult-to-break bridge portion when viewed in the opening rotation direction is 0.20 mm or less to the score. The front end of the slit is located in front of the rear end of the slit located immediately before the difficult-to-break bridge portion, and the circumferential direction between the rear end of the score and the front end of the slit at the rear side of the difficult-to-break bridge portion. The metal container lid according to claim 1 or 2 , wherein the distance D3 is 0.50 to 1.50 mm.
JP28070494A 1994-11-15 1994-11-15 Metal container lid Expired - Lifetime JP3493635B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28070494A JP3493635B2 (en) 1994-11-15 1994-11-15 Metal container lid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28070494A JP3493635B2 (en) 1994-11-15 1994-11-15 Metal container lid

Publications (2)

Publication Number Publication Date
JPH08143052A JPH08143052A (en) 1996-06-04
JP3493635B2 true JP3493635B2 (en) 2004-02-03

Family

ID=17628797

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28070494A Expired - Lifetime JP3493635B2 (en) 1994-11-15 1994-11-15 Metal container lid

Country Status (1)

Country Link
JP (1) JP3493635B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2882991B1 (en) * 2005-03-14 2007-05-18 Bernard Edmond Alfred Borgeaud METALLIC CAPSULE WITH "QUICK-CAP" INVIOLABILITY RING

Also Published As

Publication number Publication date
JPH08143052A (en) 1996-06-04

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