JP5321774B2 - Sealed container lid manufacturing method and sealed container lid - Google Patents
Sealed container lid manufacturing method and sealed container lid Download PDFInfo
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- JP5321774B2 JP5321774B2 JP2007182484A JP2007182484A JP5321774B2 JP 5321774 B2 JP5321774 B2 JP 5321774B2 JP 2007182484 A JP2007182484 A JP 2007182484A JP 2007182484 A JP2007182484 A JP 2007182484A JP 5321774 B2 JP5321774 B2 JP 5321774B2
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 63
- 230000002093 peripheral effect Effects 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims description 23
- 230000015572 biosynthetic process Effects 0.000 claims description 14
- 238000002407 reforming Methods 0.000 claims description 14
- 238000007493 shaping process Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 description 11
- 238000010168 coupling process Methods 0.000 description 11
- 238000005859 coupling reaction Methods 0.000 description 11
- 125000004122 cyclic group Chemical group 0.000 description 7
- 238000010008 shearing Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 5
- 238000005304 joining Methods 0.000 description 5
- 235000013361 beverage Nutrition 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000007781 pre-processing Methods 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- 238000010409 ironing Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000007634 remodeling Methods 0.000 description 2
- 238000009418 renovation Methods 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
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- 229920006300 shrink film Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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Abstract
Description
本発明は、飲料缶等に適用される容器蓋の製造方法及び蓋付き密封容器の製造方法、並びに容器蓋に関する。 The present invention relates to a method for manufacturing a container lid, a method for manufacturing a sealed container with a lid, and a container lid applied to beverage cans and the like.
本出願人は、開封後の再封性に優れ、且つ流通段階での密封性にも優れている飲料缶等の飲料容器の封鎖構造として、開口部となる部分が易破断部を介して注出口に連続して一体に密閉構造に形成されている蓋本体と、該蓋本体に螺合する内キャップを備えたキャップ付き密封容器を先に提案した（特許文献１参照）。当該飲料容器の封鎖構造は、内キャップが蓋本体のキャップ装着部の内部に螺合して装着されるようになっており、前記内キャップをネジ込むとその底部に形成された下方突出部がキャップ装着部の底部を押圧し、その結果、キャップ装着部の底部の周囲に形成されているスコアが破断して当該底部が開口される構造になっている。 The applicant of the present invention, as a sealing structure of a beverage container such as a beverage can that is excellent in resealability after opening and excellent in sealability in a distribution stage, the portion to be an opening is injected through an easily breakable portion. A sealed container with a cap provided with a lid main body formed integrally and continuously with the outlet in a sealed structure and an inner cap screwed into the lid main body has been proposed previously (see Patent Document 1). The sealing structure of the beverage container is such that the inner cap is screwed into the cap mounting portion of the lid body, and when the inner cap is screwed, a downward projecting portion formed on the bottom thereof is The bottom of the cap mounting part is pressed, and as a result, the score formed around the bottom of the cap mounting part is broken and the bottom is opened.
上記提案のものは、内キャップをネジ込む動作でスコアを押すことにより開封する構造になっているため、開封時には、内キャップを一旦ネジ込む方向に回転させてスコアを破断し、その後逆方向に回転させて内キャップを取り外す動作が必要であるとともに、開封前に下方突出部がキャップ装着部の底部に当たってスコアを破断しないように、シュリンクフィルム等でキャップを固定する必要があった。
そこで、本出願人は、前述したキャップ付き密封容器の封鎖構造にさらに改良を加え、図２３に示すような容器蓋を提案している（特願２００６−０８５７８６）。この容器蓋Ａ１は、上蓋Ａ２と、該上蓋Ａ２を装着する注出筒部Ａ３及び該注出筒部Ａ３と一体の天壁Ａ４を有する蓋本体Ａ５から構成されている。蓋本体Ａ５の注出筒部Ａ３の下方には、蓋本体Ａ５を缶胴部上端に巻き締め固定するためのカール部Ａ６が設けられている。上蓋Ａ２は、注出口開口用の上蓋側係合部Ａ７と封鎖用の雌ネジ部Ａ８を有しており、蓋本体Ａ５の注出筒部Ａ３には、上蓋Ａ２と螺合する雄ネジ部Ａ９と、前記上蓋側係合部Ａ７と係合する本体側係合部Ａ１０が形成されている。また、前記雄ネジ部Ａ９と本体側係合部Ａ１０との間には、スコア（易破断部）Ａ１１が形成されていて、上蓋Ａ２を開封方向に回転させることにより螺子作用により上蓋が蓋本体に対して上昇することによって、上蓋側係合部Ａ７と本体側係合部Ａ１０のより本体側係合部Ａ１０を上昇させる力が作用してスコアＡ１１が破断して蓋本体Ａ５の注出口を開口する構造になっている。このように構成されている容器蓋Ａ１は、開封動作が単純であり、密封性、再封性に優れているとともに、衛生的で且つ開封前の誤開封防止性にも優れている。 Therefore, the present applicant has further improved the sealing structure of the above-described sealed container with a cap and proposed a container lid as shown in FIG. 23 (Japanese Patent Application No. 2006-085786). The container lid A1 includes an upper lid A2, a pouring cylinder portion A3 to which the upper lid A2 is attached, and a lid body A5 having a ceiling wall A4 integrated with the pouring cylinder portion A3. A curling portion A6 for winding and fixing the lid main body A5 around the upper end of the can body portion is provided below the dispensing cylinder portion A3 of the lid main body A5. The upper lid A2 has an upper lid side engaging portion A7 for opening the spout and a female screw portion A8 for blocking. The male screw portion screwed into the upper lid A2 is inserted into the dispensing tube portion A3 of the lid main body A5. A9 and a main body side engaging portion A10 that engages with the upper lid side engaging portion A7 are formed. Also, a score (easy breakable portion) A11 is formed between the male screw portion A9 and the main body side engaging portion A10, and the upper lid is closed by the screw action by rotating the upper lid A2 in the opening direction. , The force that raises the main body side engaging portion A10 from the upper lid side engaging portion A7 and the main body side engaging portion A10 acts, the score A11 breaks, and the spout of the lid main body A5 is opened. It has an open structure. The container lid A1 configured in this manner has a simple opening operation, is excellent in sealing performance and resealability, and is hygienic and excellent in prevention of erroneous opening before opening.
このような上蓋と蓋本体からなる容器蓋を製造する場合において、上蓋側の係合部と蓋本体側の係合部を形成する方法としては、蓋本体に上蓋を被せた状態で、蓋本体内周側にマンドレルを当て、上蓋外周に回転工具（成形ロール）を押し当てて回転させることで、上蓋と蓋本体の係合部を同時に形成する方法か、あるいは、係合部を予め形成した蓋本体に、上蓋を装着した後、回転工具を上蓋外周に押し当てて上蓋側の係合部を形成する方法を採用した。 In the case of manufacturing a container lid composed of such an upper lid and a lid body, as a method of forming the engagement portion on the upper lid side and the engagement portion on the lid body side, the lid main body is covered with the upper lid. A method of forming the engaging portion of the upper lid and the lid body at the same time by applying a mandrel to the inner peripheral side and rotating a rotating tool (forming roll) on the outer periphery of the upper lid, or by previously forming the engaging portion. After attaching the upper lid to the lid body, a method of pressing the rotary tool against the outer periphery of the upper lid to form the engaging portion on the upper lid side was adopted.
ところが、前述したような方法で上蓋側と蓋本体側の係合部を形成して相互に係合させた場合、これらの係合部同士は緊密に係合していて容器蓋の軸方向に遊びを有しないため、このような容器蓋を装着した容器は、開封する際に、上蓋を開封方向に回転させると、スコアの溝全周にわたって均等に荷重が作用してしまうためスコアの破断に大きな力を要し、高齢者や小さな子供にとっては、開封が困難であることが分かった。また、係合部どうしが緊密に係合していると、係合部を形成する際に蓋本体のスコアの溝に荷重が作用して破断してしまう恐れがあった。さらに、係合部に遊びが無いと、上蓋と蓋本体間が相対的に回転された時に、これを表示するいたずら開封防止（ブリッジブレイク）の機能を付加することができない問題もあった。 However, when the upper lid side and the lid main body side engaging portions are formed and engaged with each other by the method described above, these engaging portions are closely engaged with each other in the axial direction of the container lid. Since there is no play, a container equipped with such a container lid, when opening, when the top lid is rotated in the opening direction, a load is applied evenly over the entire groove of the score, which may break the score. It took great power and proved difficult for the elderly and small children to open. Further, when the engaging portions are closely engaged with each other, there is a possibility that the load acts on the score groove of the lid body and breaks when the engaging portion is formed. Further, if there is no play in the engaging portion, there is a problem that it is impossible to add a function of preventing tampering (bridge break) for displaying this when the upper lid and the lid body are relatively rotated.
そこで、本発明は、前記提案した技術をさらに改良して前述したような問題を解消し、開封容易性の向上を図ることができるとともに、製造工程におけるスコアの破断事故を防止することができ、且つ、いたずら開封防止の機能を容易に付加することが可能な、容器蓋及び容器蓋付き密封容器の製造方法並びに密封容器蓋を提供することを目的とする。 Therefore, the present invention can further improve the proposed technique to solve the above-described problems, improve the ease of opening, and prevent score breakage in the manufacturing process, It is another object of the present invention to provide a container lid, a method for manufacturing a sealed container with a container lid, and a sealed container lid that can easily add a function of preventing tampering.
前記課題を解決する請求項１に係る本発明の容器蓋の製造方法は、開口部となる部分が易破断部を介して注出口に連続して一体に形成されている蓋本体と、該蓋本体に螺着される上蓋とからなり、該上蓋を前記蓋本体に対して回転させることにより、前記易破断部を破断して蓋本体を開封するように構成されている再封可能な容器蓋を製造する方法であって、前記蓋本体に前記易破断部より天壁寄り位置に本体側係合部を形成し、前記上蓋に前記本体側係合部に係合して上蓋側係合部となる位置に予め予成形周状屈曲部を形成し、該上蓋を前記蓋本体に装着した後、前記上蓋を軸方向へ相対的に押圧することにより、前記上蓋の予成形周状屈曲部を前記蓋本体の本体側係合部内へ変形させることにより上蓋側係合部を形成し、該上蓋側係合部を前記蓋本体側係合部に回転方向可能に係合させることを特徴とするものである。 The container lid manufacturing method of the present invention according to claim 1 that solves the above-described problem includes a lid body in which a portion to be an opening is formed integrally with a spout through an easily breakable portion, and the lid A re-sealable container lid comprising an upper lid screwed to the main body and configured to break the easily breakable portion and open the lid main body by rotating the upper lid with respect to the lid main body The main body side engaging portion is formed on the lid main body at a position closer to the top wall than the easily breakable portion, and the upper lid is engaged with the main body side engaging portion to form the upper lid side engaging portion. The preformed circumferential bent portion is formed in advance at a position where the upper lid is attached to the lid body, and then the upper lid is pressed relatively in the axial direction so that the preformed circumferential bent portion of the upper lid is An upper lid side engaging portion is formed by deforming into the main body side engaging portion of the lid main body, and the upper lid side engaging portion Is characterized in that for the rotation direction can be engaged with the lid body side engaging portion.
請求項２の発明は、請求項１に記載の密封容器蓋の製造方法において、前記上蓋側係合部と前記蓋本体側係合部間で周方向の少なくとも一部において軸方向に遊びを有する係合部を形成することを特徴とするものである。
請求項３の発明は、請求項１又は２に記載の容器蓋の製造方法において、前記上蓋側係合部の軸方向幅と前記蓋本体側係合部の軸方向幅の少なくとも一方を周方向に変化させて形成することを特徴とするものである。
請求項４の発明は、請求項１又は２に記載の容器蓋の製造方法において、前記上蓋側係合部と前記蓋本体側係合部の少なくとも一方を蛇行させて形成することを特徴とするものである。
According to a second aspect of the present invention, in the sealed container lid manufacturing method according to the first aspect, there is play in the axial direction in at least a part of the circumferential direction between the upper lid side engaging portion and the lid main body side engaging portion. An engaging portion is formed.
According to a third aspect of the present invention, in the container lid manufacturing method according to the first or second aspect, at least one of an axial width of the upper lid side engaging portion and an axial width of the lid main body side engaging portion is a circumferential direction. It is characterized by being formed by changing to
According to a fourth aspect of the present invention, in the method for manufacturing a container lid according to the first or second aspect, at least one of the upper lid side engaging portion and the lid main body side engaging portion is meandered. Is.
請求項５の発明は、請求項２〜４の何れかに記載の密封容器蓋の製造方法において、前記蓋本体に前記上蓋を装着する前に、前記蓋本体の本体側係合部を構成する環状凹部の最小直径部から延びる上側壁面及び／又は下側壁面を急傾斜状に整形するリフォーム工程を設けてなることを特徴とするものである。
請求項６の発明は、請求項２〜４の何れかに記載の密封容器蓋の製造方法において、
前記上蓋側係合部の形成と同時に、前記蓋本体の本体側係合部の最小直径部から延びる上側壁面及び／又は下側壁面を急傾斜状に整形して、前記上蓋側係合部を前記蓋本体側係合部に回転方向可能に係合させることを特徴とするものである。
さらに、請求項７の発明は、請求項１乃至４の何れかに記載の容器蓋の製造方法において、前記上蓋を前記蓋本体に対して軸方向へ相対的に押圧する際に、前記上蓋の側壁外周に支持リングを嵌装して、前記支持リングにより上蓋側面外周を支持することを特徴とする。
According to a fifth aspect of the present invention, in the method for manufacturing a sealed container lid according to any one of the second to fourth aspects, the main body side engaging portion of the lid main body is configured before the upper lid is attached to the lid main body. A reforming step is provided in which the upper wall surface and / or the lower wall surface extending from the smallest diameter portion of the annular recess is shaped to be steeply inclined.
Invention of Claim 6 in the manufacturing method of the sealed container lid in any one of Claims 2-4,
Simultaneously with the formation of the upper lid side engaging portion, the upper wall surface and / or the lower wall surface extending from the smallest diameter portion of the main body side engaging portion of the lid main body is shaped into a steep slope so that the upper lid side engaging portion is The lid main body side engaging portion is engaged with the lid main body side engaging portion so as to be rotatable.
Furthermore, the invention of claim 7 is the method for manufacturing a container lid according to any one of claims 1 to 4, wherein when the upper lid is pressed relative to the lid body in the axial direction, A support ring is fitted to the outer periphery of the side wall, and the upper cover side surface outer periphery is supported by the support ring.
前記課題を解決する請求項８に係る本発明の蓋付き容器の製造方法は、請求項１乃至７の何れかの方法で容器蓋を製造した後、該容器蓋の蓋本体を容器本体の開口部に取り付けることにより、前記開口部を封鎖することを特徴とするものである。
また、前記課題を解決する請求項９に係る本発明の蓋付き容器の製造方法は、請求項１乃至７の何れかの方法で製造する容器蓋の蓋本体を、容器本体の胴部と一体に成形することを特徴とするものである。
The method for manufacturing a container with a lid according to an eighth aspect of the present invention for solving the above-described problem is that after the container lid is manufactured by the method according to any one of the first to seventh aspects, the lid body of the container lid is opened to the container body. The opening is sealed by being attached to the part.
Moreover, the manufacturing method of the container with a lid of the present invention according to claim 9 that solves the above-mentioned problem is that the lid body of the container lid manufactured by any one of the methods of claims 1 to 7 is integrated with the trunk portion of the container body. It is characterized in that it is molded.
前記課題を解決する請求項１０に係る本発明の密封容器は、上蓋と、該上蓋を装着する注出筒部及び該注出筒部と一体の天壁を有する蓋本体を有し、前記上蓋には注出開口用の上蓋側係合部と封鎖用の雌ネジ部を有し、前記蓋本体の注出筒部には前記上蓋と螺合する雄ネジ部と、前記上蓋側係合部と係合する蓋本体側係合部と、前記雄ネジ部と前記本体側係合部との間に易破断部が形成されており、前記上蓋側係合部と前記蓋本体側係合部で軸方向係合手段を構成し、前記上蓋側係合部は上蓋の側壁内周側に突出するように形成された環状屈曲部からなり、且つ前記蓋本体側係合部は蓋本体の側壁に形成された環状凹部からなり、前記軸方向係合手段は、周方向の少なくとも一部において軸方向に遊びを有していることを特徴とするものである。 The hermetically sealed container of the present invention according to claim 10 that solves the above-described problem has an upper lid, a pouring cylinder portion to which the upper lid is attached, and a lid body having a ceiling wall integrated with the pouring cylinder portion, and the upper lid. Has an upper lid side engaging portion for a dispensing opening and a female screw portion for sealing, a male threaded portion that is screwed to the upper lid, and an upper lid side engaging portion in the dispensing cylinder portion of the lid body A lid main body side engaging portion, and an easily breakable portion is formed between the male screw portion and the main body side engaging portion, and the upper lid side engaging portion and the lid main body side engaging portion. The upper lid side engaging portion is composed of an annular bent portion formed so as to protrude toward the inner peripheral side of the upper lid side wall, and the lid main body side engaging portion is the side wall of the lid main body. consists annular recess formed in said axial engagement means, der those characterized by having a clearance in the axial direction in at least a part of the circumferential direction .
請求項１１の発明は、請求項１０に記載の密封容器蓋において、該軸方向係合手段が形成する周方向不均一係合が、前記上蓋側係合部の軸方向幅と前記蓋本体側係合部の軸方向幅の少なくとも一方を周方向に変化させて形成させてなることを特徴とするものである。
請求項１２の発明は、請求項１１に記載の密封容器蓋の前記蓋本体側係合部は、周方向に軸方向幅が異なる環状凹部からなり、該環状凹部の上側壁面に該環状凹部の軸方向幅を狭めるカム凸部を有していることを特徴とするものである。
請求項１３の発明は、請求項１１に記載の密封容器蓋の前記蓋本体側係合部は、周方向に軸方向幅が異なる環状凹部からなり、該環状凹部の下側壁面に該環状凹部の軸方向幅を狭めるカム凸部を有していることを特徴とするものである。
請求項１４の発明は、請求項１０乃至１３に記載の密封容器蓋において、前記軸方向係合手段は、前記上蓋側係合部と前記蓋本体側係合部の少なくとも一方を軸方向に蛇行させて形成させてなることを特徴とするものである。
According to an eleventh aspect of the present invention, in the sealed container lid according to the tenth aspect, the circumferential non-uniform engagement formed by the axial engagement means is the axial width of the upper lid side engaging portion and the lid main body side. It is characterized in that it is formed by changing at least one of the axial widths of the engaging portion in the circumferential direction.
According to a twelfth aspect of the present invention, the lid main body side engaging portion of the sealed container lid according to the eleventh aspect includes an annular concave portion having a different axial width in the circumferential direction, and the annular concave portion is formed on the upper wall surface of the annular concave portion. It has the cam convex part which narrows an axial direction width | variety.
According to a thirteenth aspect of the present invention, the lid main body side engaging portion of the sealed container lid according to the eleventh aspect includes an annular concave portion having a different axial width in the circumferential direction, and the annular concave portion is formed on a lower wall surface of the annular concave portion. It has the cam convex part which narrows the axial direction width | variety of this.
According to a fourteenth aspect of the present invention, in the sealed container lid according to the tenth to thirteenth aspects, the axial direction engaging means meanders at least one of the upper lid side engaging portion and the lid main body side engaging portion in the axial direction. It is characterized by being formed.
請求項１記載の発明によれば、蓋本体には本体側係合部を形成し、上蓋に予成形周状屈曲部を形成した状態で上蓋を蓋本体に装着して上蓋を軸方向に相対的に押圧して前記予成形周状屈曲部を変形させて上蓋側係合部を形成するので、上蓋側係合部は蓋本体の係合部の形状に拘束されずに蓋本体とは独立して任意に形成することができ、係合部を軸方向に遊びを持たせて形成することも容易にできる。また、該係合部を形成中に蓋本体の易破断部に剪断力や張力が作用することを防止でき、製造中の易破断部の破断事故等を防ぐことができる。 According to the first aspect of the present invention, the main body side engaging portion is formed on the lid main body, and the upper lid is attached to the lid main body in a state where the preformed circumferential bent portion is formed on the upper lid, and the upper lid is relatively axially disposed. The upper lid side engaging portion is not constrained by the shape of the engaging portion of the lid main body and is independent of the lid main body. Thus, the engaging portion can be easily formed with play in the axial direction. Further, it is possible to prevent a shearing force or tension from acting on the easily breakable portion of the lid main body during the formation of the engaging portion, and it is possible to prevent a breakage accident or the like of the easily breakable portion during manufacture.
請求項２の発明によれば、上記効果に加え、係合部を構成する上蓋側係合部と蓋本体側係合部との間に軸方向の遊びが形成されることで、容器蓋の開封時に係合部の係合状態が周方向に不均一になって、スコアに局部的な力が作用するため、容器蓋を高齢者や小さな子供でも容易に開封することができ、易開封性に優れ、且つ密封性を図ることができる。また、上蓋を開封方向に回転させてからスコアが破断するまでに遊びをとることができるため、ブリッジブレイクによるいたずら開封防止機構を容易に付加することが可能となる。
また、請求項３記載の発明によれば、上蓋側係合部の幅と蓋本体側係合部の幅の少なくとも一方を、周方向に変化させて形成することにより、容器蓋の開封時にスコアに対してより効果的に局部的な力を発生させることができるので、請求項１記載の発明に比べて易開封性をさらに高めることができる。
また、請求項４記載の発明によれば、上蓋の環状屈曲部と蓋本体の環状凹部の少なくとも一方を蛇行させて形成することにより、請求項３記載の発明と同様に容器蓋の開封時にスコアに作用する力を局部的に集中させることができ、請求項１記載の発明に比べて易開封性をさらに高めることができる。
請求項５の発明によれば、蓋本体の環状凹部の上側壁面及び／又は下側壁面を急傾斜状に整形するので、請求項２〜４の何れか記載の密封容器蓋の製造方法に適用することによって、開栓に際して上蓋側係合部の蓋本体側係合部への掛かりがより確実になり、開栓力を易破断部の一部分に確実に集中させることが可能となり易開栓の容器蓋を得ることができる。
また、請求項６の発明によれば、蓋本体の環状凹部の上側壁面及び／又は下側壁面を整形するリフォーム工程と係合工程を同時にでき、工程を増すことなく開栓に際して上蓋側係合部の蓋本体側係合部への掛かりがより確実な容器蓋を得ることができる。
請求項７の発明によれば、上蓋を蓋本体に対して相対的に軸方向に押圧する場合に、上蓋の側壁外周に支持リングを嵌装して、前記支持リングにより上蓋側面外周を支持することにより、上蓋の環状屈曲部を蓋本体の環状凹部内に変形させる際に、上蓋側面の前記環状屈曲部近傍部分が変形して、上蓋側面に歪みを生じることを防止できる。
According to the invention of claim 2, in addition to the above effect, the play in the axial direction is formed between the upper lid side engaging portion and the lid main body side engaging portion constituting the engaging portion, so that the container lid Since the engagement state of the engaging part becomes uneven in the circumferential direction when opening, and local force acts on the score, the container lid can be easily opened even by elderly people and small children, and easy opening Excellent sealing performance. Further, since play can be taken from the time when the upper lid is rotated in the opening direction until the score breaks, it is possible to easily add a mischievous opening prevention mechanism by a bridge break.
According to the invention of claim 3, by forming at least one of the width of the upper lid side engaging portion and the width of the lid main body side engaging portion in the circumferential direction, a score is obtained when the container lid is opened. Since the local force can be generated more effectively, the easy-openability can be further enhanced as compared with the invention according to claim 1.
Further, according to the invention described in claim 4, by forming at least one of the annular bent portion of the upper lid and the annular recess of the lid body in a meandering manner, the score when the container lid is opened as in the invention of claim 3. The force which acts on can be concentrated locally, and easy-opening property can be further improved compared with the invention of Claim 1.
According to the invention of claim 5, since the upper wall surface and / or the lower wall surface of the annular recess of the lid body is shaped to be steeply inclined, it is applied to the manufacturing method of the sealed container lid according to any one of claims 2 to 4. By doing so, it becomes more reliable that the upper lid side engaging portion is engaged with the lid main body side engaging portion at the time of opening, and the opening force can be reliably concentrated on a part of the easily breakable portion. A container lid can be obtained.
Further, according to the invention of claim 6, the remodeling step and the engaging step for shaping the upper wall surface and / or the lower wall surface of the annular recess of the lid main body can be performed at the same time, and the upper lid side engagement can be performed at the time of opening the plug without increasing the number of steps. It is possible to obtain a container lid that is more reliably hooked to the lid main body side engaging portion.
According to the seventh aspect of the present invention, when the upper lid is pressed in the axial direction relative to the lid main body, the support ring is fitted on the outer periphery of the side wall of the upper lid, and the outer periphery of the upper lid side surface is supported by the support ring. Accordingly, when the annular bent portion of the upper lid is deformed into the annular concave portion of the lid body, it is possible to prevent the vicinity of the annular bent portion on the side surface of the upper lid from being deformed and causing distortion on the side surface of the upper lid.
さらに、請求項８記載の発明によれば、請求項１乃至７の何れかの方法で容器蓋を製造した後、該容器蓋の蓋本体を容器本体の開口部に装着することで、開封が容易で且つ密封性に優れた再封可能な蓋付き密封容器を確実に製造することができる。 Furthermore, according to the invention described in claim 8, after the container lid is manufactured by the method according to any one of claims 1 to 7, the lid body of the container lid is attached to the opening of the container body, thereby opening the container lid. A sealed container with a lid which is easy and has excellent sealing properties can be reliably manufactured.
さらに、請求項９記載の発明によれば、請求項１乃至７の何れかの方法により容器蓋の蓋本体部分を容器本体底部に一体に成形して製造し、開口部側は、通常の底蓋を用いることで、開封が容易で且つ密封性に優れた再封可能な蓋付き密封容器を確実に製造することができる。 Furthermore, according to the ninth aspect of the present invention, the lid body portion of the container lid is formed integrally with the bottom of the container body by the method of any one of the first to seventh aspects, and the opening side is a normal bottom. By using the lid, it is possible to reliably manufacture a resealable sealed container with a lid that is easy to open and excellent in sealing performance.
請求項１０の発明によれば、係合部を構成する上蓋側係合部と蓋本体側係合部との間に軸方向の遊びを有する周方向不均一係合が形成されているので、周方向の一部で上蓋側係合部と蓋本体側係合部が集中的に係合して、易開封部の局部的な破断が達成でき、高齢者や小さな子供でも容易に開封することができ、易開封性に優れ、且つ密封性に優れた容器蓋を得ることができる。
請求項１１の発明よれば、前記上蓋側係合部の軸方向幅と前記蓋本体側係合部の軸方向幅の少なくとも一方を周方向に変化させて形成させることにより、請求項１０の発明をより簡単に達成できる。
請求項１２の発明によれば、蓋本体側係合部である環状凹部の上側壁面にカム凸部を形成しているので、上蓋を開栓方向に回転することによって、上蓋側係合部がカム凸部を押し上げ、該カム凸部下方に位置する易破断部に集中的に押上げ力が作用して容易にスコアブレイクを達成できる。
請求項１３の発明によれば、蓋本体側係合部である環状凹部の下側壁面にカム凸部を形成しているので、上蓋を開栓方向に回転することによって、上蓋側係合部がカム凸部を押し下げ、該カム凸部下方に位置する易破断部に集中的に押下げ力が作用して容易にスコアブレイクを達成できる。
また、請求項１４の発明によれば、上蓋側係合部と前記蓋本体側係合部の少なくとも一方を軸方向に蛇行させて形成させることによって、請求項１１の発明と同様な効果が得られる。
According to the invention of claim 10, since the circumferential non-uniform engagement having play in the axial direction is formed between the upper lid side engaging portion and the lid main body side engaging portion constituting the engaging portion, The upper lid side engaging part and the lid main body side engaging part are engaged intensively in a part of the circumferential direction, and the local break of the easy opening part can be achieved, so that even an elderly person or a small child can easily open it. It is possible to obtain a container lid that is easy to open and excellent in sealing performance.
According to the invention of claim 11, the invention of claim 10 is formed by changing at least one of the axial width of the upper lid side engaging portion and the axial width of the lid main body side engaging portion in the circumferential direction. Can be achieved more easily.
According to the invention of claim 12 , since the cam convex portion is formed on the upper wall surface of the annular concave portion which is the lid main body side engaging portion, the upper lid side engaging portion is moved by rotating the upper lid in the opening direction. A cam break can be easily achieved by pushing up the cam projection and intensively exerting a push-up force on the easily breakable portion located below the cam projection.
According to the invention of claim 13 , since the cam convex portion is formed on the lower side wall surface of the annular concave portion which is the lid main body side engaging portion, the upper lid side engaging portion is obtained by rotating the upper lid in the opening direction. However, the cam projection is pushed down, and a pressing force acts on the easily breakable portion located below the cam projection so that the score break can be easily achieved.
According to the invention of claim 14, the same effect as that of the invention of claim 11 is obtained by forming at least one of the upper lid side engaging portion and the lid main body side engaging portion in an axial direction. It is done.
以下、図面に基づいて本発明の一実施形態を説明する。図１は、本発明方法により形成される容器蓋の構造を示す断面図であって、容器蓋１は、上蓋２と注出口を有する蓋本体３から構成されており、両者は、上蓋２に形成された雌ネジ部４が蓋本体３に形成された雄ネジ部５に螺合されているとともに、上蓋２の側壁内周側に突出するように形成された環状屈曲部６からなる上蓋側係合部と、蓋本体３側の側壁に形成された環状凹部７からなる蓋本体側係合部によって軸方向係合手段８が形成され、後述するように開封時に相互に係合するように構成されている。本実施形態では、環状屈曲部６は、環状凹部７に対して軸方向に所定量の遊びをもって係合しており、後述するようにスコア等で形成された易破断部が破断する前に上蓋２は蓋本体３に対して僅かな回転変位が可能となっている。この所定量の遊びがないと、易破断部の破断力、いたずら防止を目的としたブリッジブレイク力、シール材の摩擦力がほぼ同時に作用するため、開栓トルクが増大してしまうのに対し、遊びを設けることで先ずブリッジブレイクが起こり、シール材４５との摩擦が充分に下がった後に易破断部を破断させることが可能となるため、開栓トルクを低減できる。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing the structure of a container lid formed by the method of the present invention. The container lid 1 is composed of an upper lid 2 and a lid body 3 having a spout, both of which are attached to the upper lid 2. The formed female screw part 4 is screwed into the male screw part 5 formed on the lid body 3 and the upper lid side includes an annular bent part 6 formed so as to protrude toward the inner peripheral side of the side wall of the upper lid 2. An axial engagement means 8 is formed by the engagement portion and the lid body side engagement portion formed of the annular recess 7 formed on the side wall on the lid body 3 side so as to be engaged with each other when opened as will be described later. It is configured. In the present embodiment, the annular bent portion 6 is engaged with the annular concave portion 7 with a predetermined amount of play in the axial direction, and the upper lid before the easily breakable portion formed by a score or the like breaks as will be described later. 2 can be slightly rotated with respect to the lid body 3. Without this predetermined amount of play, the breakage force of the easily breakable portion, the bridge break force for the purpose of preventing tampering, and the frictional force of the sealing material act almost simultaneously, whereas the opening torque increases. By providing play, first, a bridge break occurs, and the easily breakable portion can be broken after the friction with the sealing material 45 is sufficiently lowered, so that the opening torque can be reduced.
蓋本体３の上端部は注出筒部と一体に形成されている天壁９によって閉塞されているとともに、下端側には、図示しない缶胴の開口部に巻き締めして容器の開口部を密封するためのカール部１０が形成されている。また、蓋本体３は、雄ネジ部５が形成されている側壁部分よりも、環状凹部７が形成されている側壁部分の方が小径となっており、これらの径の異なる部分の間を連絡している環状の段差面２４には、開栓時破断可能な環状の易破断部としてのスコア１１が設けられている。したがって、開栓時に蓋本体の雄ネジが形成されている部分と本体側係合部（環状凹部）との間に張力が作用すればスコア１１に剪断力が生じて破断され、蓋本体の開口が可能となる。本実施形態では、上蓋２を蓋本体３に対して開封方向に回転させると、雌ネジ部４と雄ネジ部５との螺合により上蓋２が蓋本体３に対して軸方向上向きに移動しようとするが、このとき、両者の軸方向係合手段８を構成している環状屈曲部６と環状凹部７との間には軸方向に遊びをもたせているため、それにより、前述の通り初期開封時の開栓トルクを低減させることができる。 The upper end portion of the lid body 3 is closed by a top wall 9 formed integrally with the dispensing tube portion, and the opening portion of the container is tightened around the opening portion of a can barrel (not shown) on the lower end side. A curled portion 10 for sealing is formed. The lid body 3 has a smaller diameter in the side wall portion in which the annular recess 7 is formed than in the side wall portion in which the male screw portion 5 is formed, and communicates between portions having different diameters. The annular stepped surface 24 is provided with a score 11 as an annular easily breakable portion that can be broken when opened. Therefore, if a tension is applied between the portion where the male screw of the lid main body is formed and the main body side engaging portion (annular recess) at the time of opening, a shearing force is generated in the score 11 and the lid body is opened. Is possible. In the present embodiment, when the upper lid 2 is rotated in the opening direction with respect to the lid main body 3, the upper lid 2 tends to move upward in the axial direction with respect to the lid main body 3 by screwing of the female screw portion 4 and the male screw portion 5. However, at this time, since there is a play in the axial direction between the annular bent portion 6 and the annular recessed portion 7 constituting the axial engaging means 8 of both, the initial state as described above is thereby obtained. The opening torque at the time of opening can be reduced.
しかも、本実施形態では、環状凹部７の軸方向幅は全周で均一には形成されておらず、開封時に上蓋の環状屈曲部６の上側凹部壁面が当接する環状凹部の上側壁面１２の一部１３がカム状に軸方向に突出したカム凸部１３を有して狭くなるように形成されている。その結果、上蓋２を開封方向に回転させると、環状屈曲部６と環状凹部７とは、先ず同図において左側の部分から係合し始め、その結果、スコア１１の左側部分に剪断力が集中するため、スコア１１は比較的小さな力で破断することができ、小さい子供や高齢者等でも容器蓋１を容易に開封することができる。なお、環状凹部７の幅が均一に形成されている場合でも、環状屈曲部６と環状凹部７との間に軸方向に遊びを持たせることによって、雌ネジ部４と雄ネジ部５との螺合により上蓋２が蓋本体３に対して軸方向上向きに移動し始めてから後に、環状屈曲部６と環状凹部７と係合するので、容器蓋１の開封は容易となる。 Moreover, in the present embodiment, the axial width of the annular recess 7 is not uniformly formed on the entire circumference, and one of the upper wall surfaces 12 of the annular recess with which the upper recess wall surface of the annular bent portion 6 of the upper lid abuts when opened. The portion 13 has a cam projection 13 protruding in the axial direction like a cam and is formed to be narrow. As a result, when the upper lid 2 is rotated in the opening direction, the annular bent portion 6 and the annular recessed portion 7 first begin to engage from the left portion in the figure, and as a result, shear force concentrates on the left portion of the score 11. Therefore, the score 11 can be broken with a relatively small force, and the container lid 1 can be easily opened even by a small child or an elderly person. Even when the width of the annular recess 7 is formed uniformly, by providing play in the axial direction between the annular bent portion 6 and the annular recess 7, Since the upper lid 2 starts to move axially upward with respect to the lid main body 3 by screwing, the annular lid portion 6 and the annular concave portion 7 are engaged later, so that the container lid 1 can be easily opened.
次に、前述したような容器蓋１を製造する方法を図２以下に基づいて工程毎に詳細に説明する。
容器蓋１は、上蓋２と蓋本体３をそれぞれ個別の円板状のブランクから成形する。成形工程においては、先ず、上蓋２は、図２の（ａ）に示すブランク（平面視では円板状）Ｂを深絞り加工して同図（ｂ）のようにカップ状に成形する。なお、以下の説明においては、ブランクＢから上蓋２にする工程の途中のものをワークＷ１という。
カップ状のワークＷ１は、その後、トリミング、再絞り、しごき等の成形加工工程を経て、図３に示すように頂壁１５から垂下して係合部を形成する径小筒部１６とネジ形成部となる径大筒部１７との間の環状突出部１８と環状段差面１９が形成された断面形状に成形される。その後、図４に示すように、ワークＷ１の上端を押さえ部材Ｈ１で保持し、内周側を環状屈曲部成形用のマンドレルＭ１で受けた状態で外周側から環状屈曲部成形用の回転工具（成形ロール）Ｔ１を当てて、径小筒部１６に環状屈曲部６となる予成形周状屈曲部２０を形成する。なお、予成形周状屈曲部２０の内径は蓋本体径小筒部２２の外径よりも大きくなるように設定する。
Next, a method for manufacturing the container lid 1 as described above will be described in detail for each step based on FIG.
The container lid 1 forms the upper lid 2 and the lid main body 3 from individual disc-shaped blanks. In the molding step, first, the upper lid 2 is formed by drawing a blank B (disc shape in plan view) B shown in FIG. 2A into a cup shape as shown in FIG. In addition, in the following description, the thing in the middle of the process of making it into the upper cover 2 from the blank B is called workpiece | work W1.
After that, the cup-shaped workpiece W1 is subjected to molding processes such as trimming, redrawing, and ironing, and then, as shown in FIG. It is formed into a cross-sectional shape in which an annular protrusion 18 and an annular stepped surface 19 between the large-diameter cylindrical portion 17 serving as a portion are formed. Thereafter, as shown in FIG. 4, the upper end of the workpiece W1 is held by the pressing member H1 and the inner peripheral side is received by the mandrel M1 for forming the annular bent portion. A forming roll) T1 is applied to form a pre-formed circumferential bent portion 20 that becomes the annular bent portion 6 in the small diameter cylindrical portion 16. The inner diameter of the preformed circumferential bent portion 20 is set to be larger than the outer diameter of the lid main body diameter small cylinder portion 22.
一方、蓋本体３は先ず上蓋２と同様に、図示しない円板状のブランクを絞り加工してカップ状に成形する。なお、ブランクから蓋本体３を形成する工程途中のものを以下の説明においては、ワークＷ２という。カップ状のワークＷ２は、その後、トリミング、再絞り、しごき等の各工程を経て、図５に示す断面形状に成形される。図５に示すまでの工程で、前記上蓋とほぼ同様に天壁９から垂下して環状凹部を形成する径小筒部２２と注出筒部となる径大筒部２３との間の環状段差面２４と環状ビード２５が形成され、且つ径大筒部２３の下端部に容器本体への巻締部となるカール部となる張出し部２６が形成される。次いで、図６に示すように上端を押さえ部材Ｈ２で保持し、ネジ形成用のマンドレルＭ２でワークＷ２の内周面を受けた状態で、径大筒部２３の外周側に回転工具（成形ロール）Ｔ２を押し当てて、雄ネジ部５を形成する。 On the other hand, the lid body 3 is first drawn into a cup shape by drawing a disk-shaped blank (not shown) in the same manner as the upper lid 2. In addition, the thing in the middle of the process of forming the lid body 3 from the blank is referred to as a workpiece W2 in the following description. Thereafter, the cup-shaped workpiece W2 is formed into a cross-sectional shape shown in FIG. 5 through various processes such as trimming, redrawing, and ironing. The annular step surface between the small-diameter cylindrical portion 22 that hangs down from the top wall 9 and forms an annular concave portion and the large-diameter cylindrical portion 23 that becomes the extraction cylindrical portion in substantially the same manner as the upper lid in the process up to FIG. 24 and an annular bead 25 are formed, and a projecting portion 26 serving as a curled portion serving as a winding portion around the container body is formed at the lower end portion of the large-diameter cylindrical portion 23. Next, as shown in FIG. 6, the upper end is held by the pressing member H2, and the rotating tool (forming roll) is formed on the outer peripheral side of the large-diameter cylindrical portion 23 in a state where the inner peripheral surface of the workpiece W2 is received by the mandrel M2 for screw formation. T2 is pressed and the external thread part 5 is formed.
その後、図７に示すように、環状凹部成形用のマンドレルＭ３に嵌合して、ワークＷ２の上端を押さえ部材Ｈ３で保持し、マンドレルＭ３の周面の一部でワークＷ２の径小部内周面を受けるとともに、その外周面に環状凹部成形用の工具Ｔ３を押し当てて、環状凹部成形用のマンドレルＭ３と環状凹部成形用の工具Ｔ３とを連動回転させることによって、環状凹部７を形成する。本実施形態においては、環状凹部７を成形する環状凹部成形用の工具Ｔ３は、図８に示すように平面視で扇形の板状に形成されていて、その外周の弧長は環状凹部７の円周長さと同等もしくは長く形成されている。また、工具Ｔ３の外周縁中央部には、周方向に両側から次第に板厚が減少する緩い斜面Ｓに挟まれて厚みが薄い部分Ｃが形成されている。前記工具Ｔ３のこのような形状によって、図７に示すように、環状凹部成形用の工具Ｔ３と環状凹部成形用のマンドレルＭ３との間にワークＷ２を挟んで相互に転動させることで、周面の一部で溝幅がカム凸部１３となって狭くなっている環状凹部７が形成される。 After that, as shown in FIG. 7, it fits into the mandrel M3 for forming the annular recess, the upper end of the work W2 is held by the pressing member H3, and the inner periphery of the small diameter part of the work W2 is partly part of the peripheral surface of the mandrel M3. The annular recess 7 is formed by receiving the surface and pressing the annular recess forming tool T3 against the outer peripheral surface thereof and rotating the annular recess forming mandrel M3 and the annular recess forming tool T3 in an interlocking manner. . In this embodiment, the annular recess forming tool T3 for forming the annular recess 7 is formed in a fan-shaped plate shape in plan view as shown in FIG. It is formed equal to or longer than the circumferential length. Further, a thin portion C is formed in the central portion of the outer peripheral edge of the tool T3 by being sandwiched by a gentle slope S whose thickness gradually decreases from both sides in the circumferential direction. With such a shape of the tool T3, as shown in FIG. 7, the workpiece W2 is sandwiched between the tool T3 for forming the annular recessed portion and the mandrel M3 for forming the annular recessed portion, and the tool T3 is rolled around. An annular recess 7 having a narrow groove width as a cam protrusion 13 is formed on a part of the surface.
次に、図９に示すように、前工程で環状凹部７が形成されたワークＷ２を受型Ｄ１上に載置し、上方から雄ネジ部５と環状凹部７との間に形成されている環状段差面２４に上方からスコア成形用の工具Ｔ４を押し付けて、スコア１１を刻設する。その後、図１０に示すように、ワークＷ２は、受型Ｄ２上に載置され、押型Ｄ３を下降させることにより、カール部１０が絞り成形されて蓋本体３が完成する。なお、この際、支持リングＲ１によりしわが抑えられ、また受型Ｄ４は、押型Ｄ３と協働してワークＷ２の下端を上方に押圧した状態で保持する。 Next, as shown in FIG. 9, the workpiece W <b> 2 having the annular recess 7 formed in the previous process is placed on the receiving die D <b> 1 and is formed between the male screw portion 5 and the annular recess 7 from above. A score forming tool T4 is pressed against the annular stepped surface 24 from above to engrave the score 11. Thereafter, as shown in FIG. 10, the workpiece W2 is placed on the receiving die D2, and the pressing die D3 is lowered, whereby the curled portion 10 is drawn and the lid body 3 is completed. At this time, wrinkles are suppressed by the support ring R1, and the receiving die D4 holds the lower end of the work W2 in a pressed state in cooperation with the pressing die D3.
次に、以上のような工程を経て完成した蓋本体３の雄ネジ部５の内周側に、図１１に示すように、外周にネジが形成されているネジ成形用のマンドレルＭ４を螺合させて保持した状態で、この蓋本体３の上に、前述した図４の工程まで完了したワークＷ１を被せ、上方から押さえ部材Ｈ４で保持した状態で、ワークＷ１の外周面に回転工具Ｔ５を押しつけて転動させることにより、ワークＷ１に雄ネジ部５に適合した雌ネジ部４を形成する。こうして、ワークＷ１の頂壁１５の内面と蓋本体３の天壁９の上面との間に隙間ｄを残した状態で、ワークＷ１と蓋本体３は、その雌ネジ部４と雄ネジ部５によって一体に螺合連結される。 Next, as shown in FIG. 11, a screw forming mandrel M4 having a screw formed on the outer periphery is screwed onto the inner peripheral side of the male screw portion 5 of the lid body 3 completed through the above-described steps. In this state, the work W1 that has been completed up to the above-described step of FIG. 4 is placed on the lid body 3, and the rotary tool T5 is placed on the outer peripheral surface of the work W1 while being held by the pressing member H4 from above. By pressing and rolling, a female screw portion 4 that matches the male screw portion 5 is formed on the workpiece W1. In this way, the work W1 and the lid main body 3 have the female screw portion 4 and the male screw portion 5 in a state where the gap d is left between the inner surface of the top wall 15 of the work W1 and the upper surface of the top wall 9 of the lid main body 3. Are screwed together.
次に、前述したように連結されたワークＷ１と蓋本体３は、図１２に示すように、受型Ｄ５上に載置され、ワークＷ１の頂壁１５を押型Ｄ６で軸方向に押圧すると、ワークＷ１に形成されていた予成形周状屈曲部２０は、前記隙間ｄの範囲内でワークＷ１の頂壁１５が蓋本体３の天壁９に接近することにより、図１３に示すように、前記予成形周状屈曲部２０は環状凹部７内へ変形して環状屈曲部６となり、この段階でワークＷ１から上蓋２が完成し、こうして、図１に示したように上蓋２が蓋本体３に結合された容器蓋１が完成する。 Next, as shown in FIG. 12, the workpiece W1 and the lid body 3 connected as described above are placed on the receiving die D5 and when the top wall 15 of the workpiece W1 is pressed in the axial direction by the die D6, As shown in FIG. 13, the preformed circumferential bent portion 20 formed on the work W <b> 1 has the top wall 15 of the work W <b> 1 approaching the top wall 9 of the lid body 3 within the gap d, as shown in FIG. 13. The preformed circumferential bent portion 20 is deformed into the annular concave portion 7 to become the annular bent portion 6, and at this stage, the upper lid 2 is completed from the workpiece W1, and thus the upper lid 2 becomes the lid main body 3 as shown in FIG. The container lid 1 connected to is completed.
なお、押型Ｄ６には、その軸方向に摺動自在に支持リングＲ２が装着されており、この支持リングＲ２がワークＷ１（上蓋２）の径小筒部外周に嵌合することによって、予成形周状屈曲部２０を蓋本体３の環状凹部７内に変形させて環状屈曲部６とする際に、環状屈曲部６の近傍部分の側面が外側に変形して、上蓋２の径小筒部側面に歪みが生じることを防止できる。 Note that a support ring R2 is mounted on the die D6 so as to be slidable in the axial direction thereof, and this support ring R2 is fitted to the outer periphery of the small-diameter cylindrical portion of the workpiece W1 (upper cover 2), thereby performing pre-forming. When the circumferential bent portion 20 is deformed into the annular recess 7 of the lid body 3 to form the annular bent portion 6, the side surface of the portion in the vicinity of the annular bent portion 6 is deformed to the outside, and the small cylindrical portion of the upper lid 2. It is possible to prevent the side surface from being distorted.
以上のようにして、蓋本体と上蓋とを結合させることによって、環状屈曲部６と環状凹部７を軸方向に遊びを持った状態で嵌合・結合させることが容易にできる。本発明の容器蓋の製造方法は、上記実施形態に限るものでなく、種々の設計変更が可能であり、また、工程も上記順番に限るものではなく、適宜変更が可能である。例えば前記実施形態ではネジ部の形成は、蓋本体の雄ネジ部５を先に形成しておき、上蓋の雌ネジは、上蓋を蓋本体に装着後形成していたが、蓋本体と上蓋のネジ部を蓋本体に上蓋を被せて後一緒にねじ成形工具で成形するようにしてもよい。また、蓋本体へのスコアの形成位置も必ずしも環状段差面に限るものでなく、ネジ部と係合部との間であれば任意の位置に形成が可能である。 As described above, by joining the lid main body and the upper lid, it is possible to easily fit and join the annular bent portion 6 and the annular recessed portion 7 with play in the axial direction. The manufacturing method of the container lid of the present invention is not limited to the above embodiment, and various design changes are possible, and the process is not limited to the above order, and can be appropriately changed. For example, in the above embodiment, the screw portion is formed by first forming the male screw portion 5 of the lid main body, and the female screw of the upper lid is formed after the upper lid is attached to the lid main body. You may make it shape | mold with a screw-forming tool after putting a screw | thread part on a cover main body and an upper cover. Further, the position where the score is formed on the lid body is not necessarily limited to the annular step surface, and can be formed at any position between the screw portion and the engaging portion.
図１４は、本発明の他の実施形態を示すものであって、この実施形態では、蓋本体３の環状凹部７は、全周にわたり一定の溝幅に形成しているが、環状屈曲部６を形成する際に上蓋を押圧する際に使用する押型Ｄ７の下端面が傾斜している。そのため、該押型Ｄ７により上蓋２を押圧することによって、環状屈曲部６は、環状凹部７内への突出量が非軸対称になり、同図においては、上蓋２の右側に比較して左側突出量が多くなっている。このように形成することによって、開封時に上蓋を蓋本体に対して開封方向に回転させると、ネジ部の係合により上蓋が上昇するにつれて環状屈曲部６の突出量が多いところのみが蓋本体３の環状凹部７の上側壁面に係合し、該箇所を中心に集中的に蓋本体を上方へ押し上げる力が作用してスコアに剪断力が作用するので、スコア全周に亘って均一に剪断力が作用する場合と比べて、容易にスコアを破断させることができる。 FIG. 14 shows another embodiment of the present invention. In this embodiment, the annular recess 7 of the lid body 3 is formed with a constant groove width over the entire circumference, but the annular bent portion 6 is shown. The lower end surface of the pressing die D7 used when pressing the upper lid when forming the is inclined. Therefore, when the upper lid 2 is pressed by the die D7, the projecting amount of the annular bent portion 6 into the annular recess 7 becomes non-axisymmetric. In FIG. The amount is increasing. By forming in this way, when the upper lid is rotated in the opening direction with respect to the lid body at the time of opening, only the portion where the annular bent portion 6 protrudes more as the upper lid rises due to the engagement of the screw portion is the lid body 3. Is engaged with the upper wall surface of the annular recess 7, and a force that pushes the lid body upward in a concentrated manner acts on the center, and a shearing force acts on the score, so that the shearing force is uniformly distributed over the entire circumference of the score The score can be easily broken as compared with the case where the action acts.
なお、図示していないが、図１４に示す実施形態においては、環状凹部７を形成する際に、図７及び図８に示した構造の環状凹部成形用の工具Ｔ３を用いる代わりに、板厚が全体に一様な環状凹部成形用の工具を用いるとともに、環状凹部成形用のマンドレルも、当該工具に対応させて一様な溝幅を有するものを用いる。 Although not shown, in the embodiment shown in FIG. 14, when forming the annular recess 7, instead of using the annular recess forming tool T3 having the structure shown in FIGS. Is a uniform annular recess forming tool, and an annular recess forming mandrel having a uniform groove width corresponding to the tool is used.
また、本発明のさらに他の実施形態としては、環状屈曲部６を軸対称に形成せずに、周方向に変化させるようにしてもよく、これは、前述した図４に示す予成形周状屈曲部２０を成形加工する工程で用いる工具Ｔ１とマンドレルＭ１に代えて、予成形周状屈曲部２０の幅を周方向に変化させる図７及び図８に示した構造と同様な環状凹部成形用の工具と環状凹部成形用のマンドレルとを連動回転させることで実現することができる。 Further, as still another embodiment of the present invention, the annular bent portion 6 may be changed in the circumferential direction without being axially symmetric. This is because the preformed circumferential shape shown in FIG. In place of the tool T1 and the mandrel M1 used in the process of forming the bent portion 20, for forming an annular recess similar to the structure shown in FIGS. 7 and 8 in which the width of the pre-formed peripheral bent portion 20 is changed in the circumferential direction. This can be realized by rotating the tool and the mandrel for forming the annular recess in conjunction with each other.
このようにして、図１に示す容器蓋１の製造にあたって、軸方向係合手段８の構造を非軸対称にすることによって、開封時にスコア１１に作用する力を局部的に集中させることができ、易開封性をさらに向上させることができる。 In this way, in manufacturing the container lid 1 shown in FIG. 1, the force acting on the score 11 at the time of opening can be concentrated locally by making the structure of the axial engagement means 8 non-axisymmetric. , The easy-openability can be further improved.
次に、図１５は、本発明の種々の実施形態に係る容器蓋の係合部の構造を示すものであって、同図（ａ）の容器蓋１における軸方向係合手段８は、環状屈曲部６と環状凹部７がいずれも軸対称に形成されたものである。環状屈曲部６は前記実施形態と同様に後加工により形成するので、図示のように環状凹部７の軸方向幅と比べて幅小に形成でき、環状屈曲部６と環状凹部７との間に軸方向の遊びが設けられている。そのことは、以下の実施形態においても同様である。また、同図（ｂ）に示すものは、前述した図２乃至図１３の工程において説明したものであって、環状屈曲部６は、周方向に一様で軸対称に形成され、一方、環状凹部７は一部溝幅を狭く形成された非軸対称形状となっている。 Next, FIG. 15 shows the structure of the engaging portion of the container lid according to various embodiments of the present invention. The axial engaging means 8 in the container lid 1 of FIG. Both the bent portion 6 and the annular recess 7 are formed to be axisymmetric. Since the annular bent portion 6 is formed by post-processing as in the above embodiment, it can be formed smaller than the axial width of the annular recessed portion 7 as shown in the figure, and between the annular bent portion 6 and the annular recessed portion 7. Axial play is provided. The same applies to the following embodiments. 2B is the same as that described in the steps of FIGS. 2 to 13 described above, and the annular bent portion 6 is formed uniformly and axially symmetrical in the circumferential direction. The recess 7 has a non-axisymmetric shape in which the groove width is partially narrowed.
また、同図（ｃ）に示すものは、環状屈曲部６は同図（ａ）（ｂ）のものと同様に軸対称に形成されており、一方、環状凹部７は一定幅の溝が蛇行して形成されている。さらに、同図（ｄ）に示すものは、環状屈曲部６を蛇行させて形成し、一方、環状凹部７は同図（ａ）のものと同様に、溝幅一定で蛇行はなく軸対称に形成されている。
なお、図１５の（ｄ）のように、一部が軸方向に蛇行した環状屈曲部６を形成する場合には、前述した図４の工程で前加工段階の予成形周状屈曲部２０を形成する際に、図１６に示した構造の環状凹部成形用の工具Ｔ６、及び環状凹部成形用のマンドレルＭ４を用いればよい。本実施形態においては、環状凹部６を成形する環状凹部成形用の工具Ｔ６は、その外周の弧長は予成形周状屈曲部２０の円周長さと同等もしくは長く形成されている。また、工具Ｔ６の外周縁は蛇行しており、図１６に示すように、環状凹部成形用の工具Ｔ６と環状凹部成形用のマンドレルＭ４との間にワークＷ１を挟んで相互に転動させることで、蛇行した予成形周状屈曲部２０が形成される。
Further, in the case shown in FIG. 6C, the annular bent portion 6 is formed in an axial symmetry similar to those shown in FIGS. 5A and 5B, while the annular recess 7 has a meandering groove having a constant width. Is formed. Further, the one shown in FIG. 2D is formed by meandering the annular bent portion 6, while the annular recess 7 has a constant groove width and has no meandering and is axially symmetric as in FIG. Is formed.
In addition, as shown in FIG. 15 (d), when forming the annular bent portion 6 whose part is meandering in the axial direction, the pre-formed circumferential bent portion 20 in the pre-processing stage in the step of FIG. When forming, an annular recess forming tool T6 and an annular recess forming mandrel M4 having the structure shown in FIG. 16 may be used. In the present embodiment, the annular recess forming tool T6 for forming the annular recess 6 is formed such that the arc length of the outer periphery thereof is equal to or longer than the circumferential length of the preformed circumferential bent portion 20. Further, the outer peripheral edge of the tool T6 is meandering, and as shown in FIG. 16, the workpiece W1 is sandwiched between the tool T6 for forming the annular recess and the mandrel M4 for forming the annular recess, and the tool T6 rolls mutually. Thus, the meandering preformed circumferential bent portion 20 is formed.
図１７、図１８は、本発明の他の実施形態に係る容器蓋の係合部の構造を示している。本実施形態において図１に示す実施形態と同様な部分は同じ符号を付し、相違点のみについて説明する。本実施形態の容器蓋２７は、図１７において上蓋側係合部である環状屈曲部６が仮想線で示すように蛇行ビードとなっており、その一部が下向きに屈曲して蛇行部２８となっている。一方、蓋本体３の本体側係合部である環状凹部７の下側壁面の一部が上向きに突出してカム凸部２９となっていて、未開封の閉栓状態では図示のように開栓方向に上蓋を回転させることによって環状屈曲部６の蛇行部２８が環状凹部７のカム凸部２９と干渉する位置関係にある。 17 and 18 show the structure of the engaging portion of the container lid according to another embodiment of the present invention. In this embodiment, the same parts as those in the embodiment shown in FIG. 1 are denoted by the same reference numerals, and only different points will be described. The container lid 27 of the present embodiment is a meandering bead as shown in FIG. 17 in which the annular bent portion 6 that is the upper lid side engaging portion is indicated by an imaginary line, and a part thereof is bent downward and the meandering portion 28 It has become. On the other hand, a part of the lower wall surface of the annular recess 7 which is the main body side engaging portion of the lid body 3 protrudes upward to form a cam convex portion 29. In the unopened closed state, the opening direction is as shown in the figure. When the upper lid is rotated, the meandering portion 28 of the annular bent portion 6 interferes with the cam convex portion 29 of the annular concave portion 7.
したがって、本実施形態の容器蓋２７の場合、上蓋２を開封方向に回転させることによって、上蓋の蛇行部２８がカム凸部２９のカム面に沿って移動してカム凸部２９を軸方向に押し下げる。その結果、該カム凸部２９を介してその下方側に位置するスコア１１に部分的に剪断力が集中し、その部分でスコアブレイクが起こる。そして、さらに上蓋を回転することによって螺子作用により上蓋が蓋本体に対して上昇し、環状屈曲部が環状凹部７の上側壁面と係合して蓋本体の天壁近傍部を上側に引き上げることによって、スコアブレイクしたところから徐々にスコアの破断が周方向に拡がり、比較的弱い開栓トルクで蓋本体の頂壁部がスコア部分から下方注出口部と分離されて開封が行なわれる。 Therefore, in the case of the container lid 27 of the present embodiment, by rotating the upper lid 2 in the opening direction, the meandering portion 28 of the upper lid moves along the cam surface of the cam convex portion 29 and moves the cam convex portion 29 in the axial direction. Press down. As a result, the shearing force partially concentrates on the score 11 located on the lower side via the cam convex portion 29, and a score break occurs in that portion. Then, by further rotating the upper lid, the upper lid rises with respect to the lid body by the screw action, and the annular bent portion engages with the upper wall surface of the annular recess 7 to raise the vicinity of the top wall of the lid body upward. When the score breaks, the score breaks gradually spread in the circumferential direction, and the top wall portion of the lid body is separated from the score portion by the relatively weak opening torque, and the opening is performed.
以上の各実施形態で示した容器蓋は、例えば図１に示す実施形態では、開封時に上蓋の環状屈曲部６が当接する環状凹部７の上側壁面１２の一部にカム凸部１３が形成され、図１７に示す実施形態では下側壁面の一部にカム凸部２９が形成され、上蓋２を開封方向に回転させると、環状屈曲部６と環状凹部７とは、先ず環状屈曲部６とカム凸部１３或いはカム凸部２９から干渉し始め、その結果、スコア１１にはカム凸部１３又は２９の下方に位置する部分に剪断力が集中するため、スコア１１は比較的小さな力で破断することができ、小さい子供や高齢者等でも容易に開封することができるようにしている。 In the container lid shown in each of the above embodiments, for example, in the embodiment shown in FIG. 1, the cam convex portion 13 is formed on a part of the upper wall surface 12 of the annular concave portion 7 with which the annular bent portion 6 of the upper lid abuts when opened. In the embodiment shown in FIG. 17, the cam convex portion 29 is formed on a part of the lower wall surface, and when the upper lid 2 is rotated in the opening direction, the annular bent portion 6 and the annular recessed portion 7 are Interference starts from the cam convex portion 13 or the cam convex portion 29. As a result, the shear force concentrates on the score 11 at a portion located below the cam convex portion 13 or 29, so that the score 11 breaks with a relatively small force. It can be opened easily even by small children or elderly people.
しかしながら、前記カム凸部１３又は２９の傾斜面の傾斜が緩いと、開栓時に上蓋の環状屈曲部６がカム凸部１３又は２９に乗り上がり、環状屈曲部６とカム凸部１３又は２９をうまく干渉させることができない場合が生じることがある。その場合、スコアの一部分に剪断力を集中させることができず、剪断力がスコア全周に分散してしまい、スコアブレイクトルクを低減させることができない。そこで、そのような問題点を解決するために、開栓に際して上蓋の環状屈曲部（上蓋側係合部）が係合する容器本体の環状凹部の上側壁面１２及び又は下側壁面、特にカム凸部１３又は２９の壁面を図１及び図１７の状態から更に水平方向に近く、あるいはそれ以上に傾斜するように傾斜角を大きく（以下、略水平状態という）するように整形（リフォーム）して、環状屈曲部６が確実に係合するようにした。 However, if the slope of the inclined surface of the cam convex portion 13 or 29 is loose, the annular bent portion 6 of the upper lid rides on the cam convex portion 13 or 29 when the cap is opened, and the annular bent portion 6 and the cam convex portion 13 or 29 are connected. There may be a case where the interference cannot be made. In that case, the shearing force cannot be concentrated on a part of the score, and the shearing force is dispersed all around the score, so that the score break torque cannot be reduced. Therefore, in order to solve such a problem, the upper wall surface 12 and / or the lower wall surface of the annular concave portion of the container main body engaged with the annular bent portion (upper lid side engaging portion) of the upper lid when opening the cap, particularly the cam convexity. The wall surface of the portion 13 or 29 is shaped (reformed) so that the inclination angle is increased (hereinafter referred to as a substantially horizontal state) so as to be inclined further closer to the horizontal direction than the state of FIGS. The annular bent portion 6 is surely engaged.
図１９は、図１に示すような実施形態の容器蓋を製造する工程において、容器本体の環状凹部７の上側壁面１２、特にカム凸部１３の壁面を図１の状態から更に略水平方向に近くなるように中心軸に対して傾斜角を大きくして上蓋の環状屈曲部がより掛かりやすくなるように整形する実施形態を示し、本実施形態では、蓋本体に上蓋を装着する前に、環状凹部７の最小直径部から天壁側に延びる上側壁面１２の傾斜角度を略水平状になるように整形するリフォーム工程を設けた。前記実施形態と同様な部分については同様な符号を付し、相違点のみについて説明する。 FIG. 19 shows a process of manufacturing the container lid of the embodiment as shown in FIG. 1 in which the upper wall surface 12 of the annular recess 7 of the container body, in particular, the wall surface of the cam projection 13 is further substantially horizontal from the state of FIG. An embodiment is shown in which the angle of inclination is increased with respect to the central axis so as to be closer, and the upper lid is bent so that the annular bent portion is more easily hooked. In this embodiment, the annular shape is attached before the upper lid is attached to the lid body. A reforming step was provided for shaping the inclination angle of the upper wall surface 12 extending from the smallest diameter portion of the recess 7 toward the top wall so as to be substantially horizontal. The same parts as those in the above embodiment are given the same reference numerals, and only the differences will be described.
前記実施形態の図５〜図１０に示す方法と同様な方法で成形された蓋本体３０を、受型Ｄ８上に載置して（図１９（Ａ））、この状態で蓋本体３０の天壁９を押型Ｄ９で軸方向に押圧することによって、図１９（Ｄ）のｂ部拡大図で示すように、上蓋に形成された環状凹部７のカム凸部１３を含む上側壁面１２が図１９（Ｂ）のａ部拡大図で示す状態からさらに下側に倒れ込み、上側壁面の軸方向の傾斜角度が緩傾斜から次第に傾斜角度の大きい急傾斜状（略水平状）にリフォームされる（図１９（Ｃ））。このようにして図１９（Ｄ）のｂ部拡大図に示すように上側壁面１２が略水平状態になるまで屈曲させる整形を行い、上蓋の環状屈曲部の軸方向への掛かりが良くなるようにする。なお、上記リフォームは、環状凹部の上側壁面１２（カム凸部壁面を含む）の傾斜角αは、中心軸に対して６０゜〜１２０゜、より望ましくは７５゜〜１００゜の範囲となるように整形（リフォーム）する。傾斜角が６０゜以下ではリフォーム効果が薄く、１２０゜以上となるとリフォーム加工が困難であると共に上側壁面１２の幅が狭くなり逆に環状屈曲部の係合性を阻害する恐れがあるので、上記範囲特に７５゜〜１００゜が望ましい。 The lid main body 30 molded by the same method as that shown in FIGS. 5 to 10 of the above embodiment is placed on the receiving die D8 (FIG. 19A), and the top of the lid main body 30 is placed in this state. By pressing the wall 9 in the axial direction with the pressing die D9, the upper wall surface 12 including the cam convex portion 13 of the annular concave portion 7 formed in the upper lid is shown in FIG. 19B further falls down from the state shown in the enlarged view of part a, and the upper side wall surface is gradually reformed from a gentle slope to a steep slope (substantially horizontal) with a large slope angle (FIG. 19). (C)). In this way, as shown in the enlarged view of portion b in FIG. 19D, the upper wall surface 12 is shaped to be bent until it is substantially horizontal so that the annular bent portion of the upper lid is better hooked in the axial direction. To do. In the above reforming, the inclination angle α of the upper wall surface 12 (including the cam convex wall surface) of the annular recess is in the range of 60 ° to 120 °, more preferably 75 ° to 100 ° with respect to the central axis. To reshape. If the inclination angle is 60 ° or less, the reforming effect is thin, and if it is 120 ° or more, the remodeling process is difficult and the width of the upper wall surface 12 becomes narrow, which may impair the engagement of the annular bent portion. A range of 75 ° to 100 ° is particularly desirable.
なお、図中Ｒ３は、支持リングであり、押型Ｄ９の外周部に軸方向に摺動自在に装着されており、この支持リングＲ３が蓋本体３０の径小筒部外周に嵌合することによって、環状凹部７の上側壁面１２のリフォームを行なう際に、環状凹部７の近傍部分の側面が外側に変形して、蓋本体の径小筒部側面に歪みが生じることを防止することができる。また、本実施形態では、蓋本体３０の天壁９の外周部は天壁パネル面から下がった環状段差面３４となって環状凹部の上方に位置しており、それに合わせて押型Ｄ９も蓋本体の環状段差面３４を集中的に押圧できるようにその下面の押圧面が環状突出面Ｄ９−１となっている。そのようにすることによって、蓋本体の環状凹部７が形成されている径小筒部に効率的に軸方向圧縮力を付与することができ、より確実に環状凹部のリフォームを行なうことができる。 In the figure, R3 is a support ring, which is slidably mounted in the axial direction on the outer peripheral portion of the pressing die D9, and this support ring R3 is fitted to the outer periphery of the small cylinder portion of the lid body 30. When the upper wall surface 12 of the annular recess 7 is reformed, it is possible to prevent the side surface in the vicinity of the annular recess 7 from being deformed to the outside and distorting the side surface of the small cylindrical portion of the lid body. Moreover, in this embodiment, the outer peripheral part of the top wall 9 of the lid body 30 is an annular step surface 34 that is lowered from the top wall panel surface, and is positioned above the annular recess. The annular step surface 34 is an annular projecting surface D9-1 so that the annular step surface 34 can be intensively pressed. By doing so, an axial compressive force can be efficiently applied to the small-diameter cylindrical portion in which the annular recess 7 of the lid body is formed, and the annular recess can be more reliably reformed.
以上のようにして得られた環状凹部がリフォームされた蓋本体３０を、図示しないが図１１と同様に、蓋本体３０の雄ネジ部５の内周側に、外周にネジが形成されているネジ成形用のマンドレルを螺合させて保持した状態で、この蓋本体３０の上に上蓋（ワークＷ１）を被せる。この状態で蓋本体の環状段差面２４と上蓋の環状段差面１９が接触し、上蓋の頂壁１５の内面と蓋本体３の天壁９の上面との間に隙間ｄ（図２０参照）を残した状態で嵌合する。そして、この状態で、図１１に示すものと同様にして、上蓋３１に雄ネジ部５に螺合する雌ネジ部４を形成して、上蓋３１と蓋本体３０を一体に螺合連結させる。なお、上記実施形態は、環状凹部の上側壁面をリフォームする場合を示しているが、同様な方法で図１７、図１８に示す容器蓋２７の環状凹部の下側壁面、特にカム凸部の半径方向面のリフォームを行なうことができる。 The lid main body 30 with the annular recess reformed as described above is remodeled, but a screw is formed on the outer periphery on the inner peripheral side of the male screw portion 5 of the lid main body 30 as shown in FIG. An upper lid (work W1) is placed on the lid body 30 in a state where the mandrel for screw forming is screwed and held. In this state, the annular step surface 24 of the lid body and the annular step surface 19 of the upper lid come into contact with each other, and a gap d (see FIG. 20) is formed between the inner surface of the top wall 15 of the upper lid and the upper surface of the top wall 9 of the lid body 3. Fit in the remaining state. In this state, in the same manner as shown in FIG. 11, the upper lid 31 is formed with the female screw portion 4 that is screwed into the male screw portion 5, and the upper lid 31 and the lid body 30 are screwed together. Although the above embodiment shows a case where the upper wall surface of the annular recess is reformed, the radius of the lower wall surface of the annular recess of the container lid 27 shown in FIGS. Directional surface reform can be performed.
図２０は、以上のようにして得られた環状凹部がリフォームされた蓋本体３０と該蓋本体に螺合した上蓋３１を、本体側係合部である環状凹部７と上蓋側係合部である環状屈曲部６を係合させて上蓋３１と蓋本体３０を一体に装着させる工程を示す図である。図１２に示す実施形態と同様に、連結されたワークＷ１と蓋本体３は、受型Ｄ５上に載置され（図２０（Ａ））、この状態から上蓋３１の頂壁１５を押型Ｄ６で軸方向に押圧すると、図２０（Ｂ）示すように上蓋３１（ワークＷ１）に形成されていた予成形周状屈曲部２０が屈曲して、前記隙間ｄの範囲内で環状凹部７内へ変形して環状屈曲部６となり、この段階でワークＷ１から上蓋３１が完成し、こうして上蓋３１が蓋本体３０に結合された容器蓋３３が完成する。なお、本実施形態の上蓋３１の頂壁１５は蓋本体３０の天壁９に合わせて、その外周部が環状段差面３５となっており、押型Ｄ６の押圧面も環状突出部Ｄ６−１となっている。また、支持リングＲ４は、図１２に示す実施形態と同様な作用を果たす。 FIG. 20 shows a lid main body 30 in which the annular concave portion obtained as described above is reformed, and an upper lid 31 screwed into the lid main body, with the annular concave portion 7 as the main body side engaging portion and the upper lid side engaging portion. It is a figure which shows the process of engaging the certain cyclic | annular bending part 6, and attaching the upper cover 31 and the cover main body 30 integrally. Similarly to the embodiment shown in FIG. 12, the connected workpiece W1 and the lid body 3 are placed on the receiving die D5 (FIG. 20A), and the top wall 15 of the upper lid 31 is pushed by the die D6 from this state. When pressed in the axial direction, as shown in FIG. 20B, the preformed circumferential bent portion 20 formed on the upper lid 31 (work W1) is bent and deformed into the annular recess 7 within the gap d. The upper lid 31 is completed from the workpiece W1 at this stage, and thus the container lid 33 in which the upper lid 31 is coupled to the lid body 30 is completed. The top wall 15 of the upper lid 31 of the present embodiment has an annular stepped surface 35 in accordance with the top wall 9 of the lid main body 30, and the pressing surface of the pressing die D6 is also different from the annular protruding portion D6-1. It has become. Further, the support ring R4 performs the same operation as that of the embodiment shown in FIG.
本実施形態の容器蓋は以上のように構成され、開栓に際して上蓋を開栓方向に回したときに、最初に上蓋の環状屈曲部６が蓋本体の環状凹部７のカム凸部１３の傾斜面（カム面）と係合するが、本実施形態の容器蓋３３は、蓋本体の環状凹部７の上側壁面１２、特にカム凸部１３のカム面が、図１９（Ｄ）にその断面を拡大して示すように、周方向に略水平状態にリフォームされているので、環状屈曲部６が確実にカム凸部１３のカム面１２と係合し、その部分に集中的に張力を付与することができる。その結果、その下方部に位置するスコアに部分的に剪断力を集中させることができ、スコアブレイクトルクを上昇させることなく、スコアブレイクができ、開栓トルクを上昇させることなく、容易に開口できる。 The container lid of the present embodiment is configured as described above, and when the upper lid is turned in the direction of opening at the time of opening, the annular bent portion 6 of the upper lid first inclines the cam convex portion 13 of the annular concave portion 7 of the lid body. The container lid 33 according to this embodiment is engaged with the surface (cam surface). The upper wall surface 12 of the annular recess 7 of the lid body, in particular, the cam surface of the cam projection 13 is shown in cross section in FIG. As shown in an enlarged manner, since it is reformed in a substantially horizontal state in the circumferential direction, the annular bent portion 6 surely engages with the cam surface 12 of the cam convex portion 13 and intensively applies tension to that portion. be able to. As a result, the shear force can be partially concentrated on the score located in the lower part, the score break can be performed without increasing the score break torque, and the opening can be easily performed without increasing the opening torque. .
図２１は、蓋本体の環状凹部をリフォームする場合の他の実施形態を示している。図１９に示す実施形態では、まず蓋本体の環状凹部をリフォームするリフォーム工程を行い、その後上蓋を蓋本体に被せ上蓋と蓋本体とを接合する接合工程を経て上蓋と蓋本体が一体に装着された容器蓋を得ていたが、本実施形態では、リフォームと接合を同時に行なう、即ちリフォーム工程と接合工程を１工程で行なう場合を示している。該実施形態において、前記実施形態と同様構成については同じ符号を付し、相違点のみについて詳細に説明する。 FIG. 21 shows another embodiment in the case where the annular recess of the lid body is reformed. In the embodiment shown in FIG. 19, first, a reforming process for reforming the annular recess of the lid main body is performed, and then the upper lid and the lid main body are integrally attached through a joining process of covering the upper lid on the lid main body and joining the upper lid and the lid main body. In this embodiment, the case where the reforming and the joining are performed simultaneously, that is, the reforming process and the joining process are performed in one process is shown. In this embodiment, the same components as those in the above embodiment are denoted by the same reference numerals, and only differences will be described in detail.
図２１（Ａ）〜（Ｂ）は、上蓋の予成形周状屈曲部２０を蓋本体の環状凹部３４内に屈曲させて上蓋と蓋本体を接合する前記実施形態の図１２、図１３に相当する図である。本実施形態では同図（Ｂ）に示す状態から、同図（Ｃ）に示すようにさらに押型Ｄ７を降下させることにより蓋本体の環状凹部の整形を行なう環状凹部整形工程を設けてある。即ち、同図（Ａ）に示すように、予成形周状屈曲部２０が形成された上蓋３１を蓋本体３０に、上蓋の頂壁１５の内面と蓋本体３０の天壁９の上面との間に隙間ｄを有するように螺合して一体化した状態（図２１（Ａ））から、上蓋の頂壁１５の内面と蓋本体３０の天壁９が接触するまで、押型Ｄ７を下降させることによって、予成形周状屈曲部２０が環状凹部内に屈曲して、上蓋側係合部となる環状屈曲部６が形成される（図２１（Ｂ））。この状態から、さらに押型Ｄ７を下降させることによって、上蓋側係合部がさらに屈曲すると共に、上蓋を介して蓋本体３０が圧縮力を受け、蓋本体の環状凹部７のカム凸部１３を含む上側壁面１２が同図（Ｂ）の状態からさらに下側に倒れ込み、上側壁面の軸方向の傾斜角度が緩傾斜から次第に傾斜角度の大きい急傾斜状（略水平状）にリフォームされて同図（Ｃ）に示す状態となり、蓋本体の環状凹部の上側壁面が略水平状態になる。以上のように、本実施形態では、蓋本体の環状凹部のリフォームと上蓋との接合を同時に行なうことができ、別途リフォーム工程を設ける必要がない。なお、その場合、上蓋３１の頂壁外周部及び蓋本体の天壁外周部を共に環状段差面に形成し、且つ押型Ｄ７の押圧面も該環状段差面を押圧するようにすることによって、より効率的に結合及びリフォームを行なうことができる。 21 (A) to 21 (B) correspond to FIGS. 12 and 13 of the above embodiment in which the upper lid and the lid body are joined by bending the preformed circumferential bent portion 20 of the upper lid into the annular recess 34 of the lid body. It is a figure to do. In the present embodiment, there is provided an annular recess shaping step for shaping the annular recess of the lid main body by further lowering the pressing die D7 from the state shown in FIG. That is, as shown in FIG. 3A, the upper lid 31 formed with the pre-formed circumferential bent portion 20 is formed on the lid body 30, and the inner surface of the top wall 15 of the upper lid and the upper surface of the top wall 9 of the lid body 30 are separated. The die D7 is lowered from the state of being screwed and integrated so as to have a gap d between them (FIG. 21A) until the inner surface of the top wall 15 of the upper lid and the top wall 9 of the lid body 30 come into contact. As a result, the preformed circumferential bent portion 20 is bent into the annular concave portion, and the annular bent portion 6 serving as the upper lid side engaging portion is formed (FIG. 21B). By further lowering the pressing die D7 from this state, the upper lid side engaging portion is further bent, and the lid main body 30 receives a compressive force via the upper lid, and includes the cam convex portion 13 of the annular concave portion 7 of the lid main body. The upper wall surface 12 falls further downward from the state shown in FIG. 6B, and the upper wall surface is gradually reformed from a gentle inclination to a steep inclination (substantially horizontal) with a large inclination angle. C), and the upper wall surface of the annular recess of the lid body is substantially horizontal. As described above, in the present embodiment, the reforming of the annular recess of the lid body and the upper lid can be performed simultaneously, and there is no need to provide a separate reforming step. In this case, by forming both the outer peripheral portion of the top wall of the upper lid 31 and the outer peripheral portion of the top wall of the lid body on the annular step surface, and the pressing surface of the pressing die D7 also presses the annular step surface, Bonding and reforming can be performed efficiently.
以上のように、本発明に係る容器蓋及びその製造方法の種々の実施形態について説明したが、本発明に係る容器蓋は必ずしも容器蓋単独として構成される場合に限らず、容器の胴部と一体に構成することも可能である。図２２は、容器蓋の蓋本体部分を缶胴と一体に成形して製造した蓋付き密封容器の一実施形態を示している。同図に示す蓋付き密封容器４０は、缶胴４１と一体に成形された蓋本体４２に上蓋２を前述した容器蓋１の製造方法で取り付け、その後、缶胴４１底部の開口部から内容物を充填した後に、前記開口部に底蓋４４を巻き締め密封して製造したものである。したがって、蓋本体が缶胴と一体となっている点を除き、蓋本体及び上蓋の構造は、上記種々の実施形態のものがそのまま採用できる。 As described above, various embodiments of the container lid and the manufacturing method thereof according to the present invention have been described. However, the container lid according to the present invention is not necessarily configured as a container lid alone, It is also possible to configure it integrally. FIG. 22 shows an embodiment of a sealed container with a lid manufactured by integrally molding the lid body portion of the container lid with the can body. The lidded sealed container 40 shown in the figure is attached to the lid body 42 formed integrally with the can body 41 by the above-described method for manufacturing the container lid 1, and then the contents from the opening at the bottom of the can body 41. After filling, the bottom lid 44 is wound and sealed in the opening. Therefore, except for the point that the lid body is integrated with the can body, the structures of the above-described various embodiments can be employed as they are as the structure of the lid body and the upper lid.
以上の図１〜図２１の実施形態で示す容器蓋は、蓋付き密封容器を製造する際に、蓋本体３のカール部１０を缶胴の上端開口部に巻き締めして、容器の密封を行うものであるが、カール部１０を形成せずに、蓋本体の下端部を円筒状に形成し、缶胴の開口部に接着、蝋付け、あるいは、溶接等の固着手段を用いて接合してもよい。 The container lid shown in the embodiment of FIGS. 1 to 21 is configured to wind the curled portion 10 of the lid main body 3 around the upper end opening of the can body to manufacture the sealed container with a lid, thereby sealing the container. Although the curled portion 10 is not formed, the lower end portion of the lid body is formed in a cylindrical shape, and bonded to the opening of the can body using an adhering, brazing, or welding fixing means. May be.
本発明の容器蓋及び蓋付き密封容器の製造方法は、上蓋が蓋本体に螺合され、開封時に上蓋を回転させることによって、蓋本体の天壁周囲のスコアを破断して天壁を開封する構造の広口容器から狭口容器の蓋又は蓋付き密封容器の製造分野に好適に利用することができる。また、このようにして製造された容器蓋又は蓋付き密封容器は、密封性が高く、開封動作が単純で開封性に優れ、且つ上蓋による再封性にも優れているので、通常の飲料から高密封性が要求される内容品の容器の蓋又は容器として好適に利用することができる。 In the method of manufacturing a container lid and a sealed container with a lid according to the present invention, the upper lid is screwed to the lid body, and the upper lid is rotated at the time of opening, thereby breaking the score around the ceiling wall of the lid body and opening the ceiling wall. It can be suitably used in the field of manufacturing a wide-mouth container having a structure to a lid of a narrow-mouth container or a sealed container with a lid. In addition, the container lid or lidded sealed container manufactured in this way has high sealing performance, simple opening operation, excellent opening performance, and excellent resealability with an upper lid. It can be suitably used as a container lid or a container for a content item requiring high sealing performance.
１、２７ 容器蓋 ２、３１ 上蓋
３、３０ 蓋本体 ４ 雌ネジ部
５ 雄ネジ部 ６ 環状屈曲部
７ 環状凹部 ８ 係合部
９ 天壁 １０ カール部
１１ スコア １２ 上側壁面
１３、２９ カム凸部 １５ 頂壁
１６、２２ 径小筒部 １７、２３ 径大筒部
１８ 環状突出部 １９、２４ 環状段差面
２０ 予成形周状屈曲部 ２５ 環状ビード
２６ 張出し部 ２８ 蛇行部
４０ 蓋付き密封容器
４１ 缶胴 ４２ 蓋本体
４４ 底蓋 ４５ シール材
DESCRIPTION OF SYMBOLS 1,27 Container lid 2,31 Upper lid 3,30 Lid main body 4 Female screw part 5 Male screw part 6 Annular bending part 7 Annular recessed part 8 Engaging part 9 Top wall 10 Curl part 11 Score 12 Upper wall surface 13, 29 Cam convex part 15 Top wall 16, 22 Small diameter cylindrical portion 17, 23 Large diameter cylindrical portion 18 Annular projecting portion 19, 24 Annular stepped surface 20 Pre-formed circumferential bent portion 25 Annular bead 26 Overhang portion 28 Meandering portion 40 Sealed container 41 with lid Can body 42 Lid body 44 Bottom lid 45 Sealing material
Claims (14)
前記蓋本体に前記易破断部より天壁寄り位置に本体側係合部を形成し、前記上蓋に前記本体側係合部に係合して上蓋側係合部となる位置に予め予成形周状屈曲部を形成し、該上蓋を前記蓋本体に装着した後、前記上蓋を軸方向へ相対的に押圧することにより、前記上蓋の予成形周状屈曲部を前記蓋本体の本体側係合部内へ変形させることにより上蓋側係合部を形成し、該上蓋側係合部を前記蓋本体側係合部に回転方向可能に係合させることを特徴とする密封容器蓋の製造方法。 A lid body in which a portion to be an opening is formed integrally with the spout through the easily breakable portion, and an upper lid screwed to the lid body, the upper lid with respect to the lid body A method of manufacturing a resealable container lid configured to rotate and to rupture the easily breakable portion to open the lid body,
A main body side engaging portion is formed on the lid main body at a position closer to the top wall than the easily breakable portion, and the upper lid is preliminarily molded at a position where it engages with the main body side engaging portion and becomes the upper lid side engaging portion. After the upper lid is attached to the lid body, the preformed circumferential bent portion of the upper lid is engaged with the body side of the lid body by pressing the upper lid relatively in the axial direction. An upper lid side engaging portion is formed by being deformed into the portion, and the upper lid side engaging portion is engaged with the lid main body side engaging portion so as to be rotatable in a rotational direction.
前記軸方向係合手段は、周方向の少なくとも一部において軸方向に遊びを有していることを特徴とする密封容器蓋。 A lid body having an upper lid, a pouring cylinder portion to which the upper lid is mounted, and a ceiling wall integrated with the pouring cylinder portion, and the upper lid side engaging portion for the pouring opening and a female for sealing A threaded portion, a male threaded portion that engages with the upper lid, a lid body side engaging portion that engages with the upper lid side engaging portion, and a male threaded portion. An easily breakable portion is formed between the main body side engaging portion, and the upper lid side engaging portion and the lid main body side engaging portion constitute an axial engagement means, and the upper lid side engaging portion is It consists of an annular bent portion formed so as to protrude toward the inner peripheral side of the side wall of the upper lid, and the lid main body side engaging portion consists of an annular recess formed on the side wall of the lid main body,
The sealed container lid characterized in that the axial engagement means has play in the axial direction in at least a part of the circumferential direction.
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| JP2007182484A JP5321774B2 (en) | 2006-08-18 | 2007-07-11 | Sealed container lid manufacturing method and sealed container lid |
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| JP2006223540 | 2006-08-18 | ||
| JP2006223540 | 2006-08-18 | ||
| JP2007182484A JP5321774B2 (en) | 2006-08-18 | 2007-07-11 | Sealed container lid manufacturing method and sealed container lid |
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| JP5321774B2 true JP5321774B2 (en) | 2013-10-23 |
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| US20180044155A1 (en) | 2016-08-12 | 2018-02-15 | Ball Corporation | Apparatus and Methods of Capping Metallic Bottles |
| JP7046163B2 (en) * | 2017-09-15 | 2022-04-01 | ボール コーポレイション | Equipment and methods for forming metal stoppers for threaded containers |
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| JP2004099105A (en) * | 2002-09-10 | 2004-04-02 | Toppan Printing Co Ltd | Easy-open mouth plug |
| JP2004136976A (en) * | 2002-09-24 | 2004-05-13 | Uchida Yoki Kk | Screw type lid structure, screw type lid section using the same, and method of manufacturing the same |
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