JP6128831B2 - Plastic container lid - Google Patents

Plastic container lid Download PDF

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JP6128831B2
JP6128831B2 JP2012279771A JP2012279771A JP6128831B2 JP 6128831 B2 JP6128831 B2 JP 6128831B2 JP 2012279771 A JP2012279771 A JP 2012279771A JP 2012279771 A JP2012279771 A JP 2012279771A JP 6128831 B2 JP6128831 B2 JP 6128831B2
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peripheral surface
skirt
tamper
inner peripheral
container lid
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JP2014122062A (en
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幸仁 野崎
幸仁 野崎
仁臣 松谷
仁臣 松谷
基勝 山田
基勝 山田
新治 大岡
新治 大岡
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Nippon Closures Co Ltd
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Nippon Closures Co Ltd
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本発明は、合成樹脂製容器蓋、更に詳しくは円形天面壁とこの天面壁の周縁から垂下する円筒形スカート壁とを具備し、スカート壁には周方向に延びる破断ラインが形成されていて、スカート壁は破断ラインより上方の主部と破断ラインより下方のタンパーエビデント裾部に区画されている合成樹脂製容器蓋に関する。   The present invention comprises a synthetic resin container lid, more specifically, a circular top wall and a cylindrical skirt wall depending from the periphery of the top wall, and a rupture line extending in the circumferential direction is formed on the skirt wall, The skirt wall relates to a synthetic resin container lid that is partitioned into a main part above the break line and a tamper evidence skirt below the break line.

下記特許文献１及び２に開示されている如く、ポリエチレンテレフタレートの如き適宜の合成樹脂、ガラス或いは金属薄板から形成された飲料用容器のための容器蓋として、円形天面壁とこの天面壁の周縁から垂下する円筒形スカート壁を具備し、スカート壁には周方向に延びる破断ラインが形成されていて、スカート壁は破断ラインより上方の主部と破断ラインより下方のタンパーエビデント裾部に区画されている合成樹脂製容器が広く実用に供されている。スカート壁の主部の内周面には雌螺条が形成されており、タンパーエビデント裾部の内周面には係止手段が形成されている。係止手段は周方向に間隔をおいて周方向に延びる複数個の係止突条或いは周方向に連続して延びる１個の係止突条から構成されている。容器は円筒形状の口頸部を備えており、この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。   As disclosed in the following Patent Documents 1 and 2, as a container lid for a beverage container formed of an appropriate synthetic resin such as polyethylene terephthalate, glass or metal sheet, a circular top wall and a peripheral edge of the top wall It has a cylindrical skirt wall that hangs down, and a rupture line extending in the circumferential direction is formed in the skirt wall, and the skirt wall is divided into a main part above the break line and a tamper evidence skirt below the break line. Synthetic resin containers are widely used in practice. A female thread is formed on the inner peripheral surface of the main portion of the skirt wall, and a locking means is formed on the inner peripheral surface of the tamper evidence skirt. The locking means is composed of a plurality of locking ridges extending in the circumferential direction at intervals in the circumferential direction or one locking ridge extending continuously in the circumferential direction. The container is provided with a cylindrical mouth-and-neck portion, and an outer thread surface of the mouth-and-neck portion is formed with a male screw thread and a locking jaw portion positioned below the male screw thread.

容器の口頸部に容器蓋を装着して密封する際には、容器の口頸部に容器蓋を被嵌し、口頸部に対して容器を閉回転方向（上方から見て時計方向）に回転せしめて、容器蓋の雌螺条を口頸部の雄螺条に螺合せしめる。容器の係止手段は口頸部の係止あご部を弾性的に乗り越えてその下方に係止せしめられる。   When a container lid is attached and sealed to the mouth and neck of the container, the container lid is fitted on the mouth and neck of the container, and the container is closed with respect to the mouth and neck. The female thread on the container lid is screwed onto the male thread on the mouth and neck. The container locking means elastically climbs over the locking jaw part of the mouth-neck part and is locked below it.

特開２０１２−１７１６４６号公報JP 2012-171646 A 特開２０１２−２０１４０２号公報JP 2012-201202 A

而して、上述したとおりの従来の容器蓋には、特に成形材料量の低減のためにスカート壁のタンパーエビデント裾部の厚さを相当薄く設定した場合に、容器の口頸部を密封するために容器の口頸部に容器蓋を被嵌して閉方向に回転せしめる際に、口頸部の雄螺条の上面に当接するタンパーエビデント裾部の下端部が、半径方向外方ではなくて半径方向内方に変位して内側に巻き込まれ、これによって容器蓋の装着操作が不可能になってしまう傾向がある。   Thus, in the case of the conventional container lid as described above, especially when the thickness of the skirt wall tamper evidence hem is set to be considerably thin to reduce the amount of molding material, the container neck and neck are sealed. When the container lid is fitted to the mouth and neck of the container and rotated in the closing direction, the lower end of the tamper evidence hem that contacts the upper surface of the male thread of the mouth and neck is radially outward. Instead, it is displaced inward in the radial direction and is entangled inside, which tends to make the container lid mounting operation impossible.

本発明は上記事実に鑑みてなされたものであり、その主たる技術的課題は、スカート壁のタンパーエビデント裾部の厚さが相当薄い場合でも、容器の口頸部を密封するために容器の口頸部に容器蓋を被嵌して閉方向に回転せしめる際に、タンパーエビデント裾部の下端部が半径方向内方に変位して内側に巻き込まれることが充分確実に回避される、新規且つ改良された合成樹脂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-mentioned facts, and the main technical problem thereof is to seal the container neck and neck in order to seal the container neck and neck even when the skirt wall tamper evident hem is considerably thin. When the container lid is fitted on the mouth and neck and rotated in the closing direction, the lower end of the tamper evidence hem is displaced inward in the radial direction with sufficient avoidance. Another object of the present invention is to provide an improved synthetic resin container lid.

本発明者等は、鋭意検討の結果、タンパーエビデント裾部の内周面下端部を下方に向かって半径方向外方に傾斜する円錐台形状にせしめることによって、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。   As a result of intensive studies, the present inventors achieve the above technical problem by causing the lower end portion of the inner peripheral surface of the tamper evidence skirt to have a truncated cone shape that is inclined radially outwardly downward. I found out that I can.

即ち、本発明によれば、上記技術的課題を達成する合成樹脂製容器蓋として、円形天面壁と該天面壁の周縁から垂下する円筒形スカート壁とを具備し、該スカート壁には周方向に延びる破断ラインが形成されていて、該スカート壁は該破断ラインより上方の主部と該破断ラインより下方のタンパーエビデント裾部とに区画されており、該主部の内周面には雌螺条が形成され、該タンパーエビデント裾部の内周面には周方向に間隔をおいて周方向に延びる複数個の係止突条或いは周方向に連続して延びる１個の係止突条から構成された係止手段が配設されている合成樹脂製容器蓋において、
該タンパーエビデント裾部の外周面下端部は下方に向かって半径方向外方に傾斜する円錐台形状部を含み、
該タンパーエビデント裾部の内周面下端部は、該円錐台形状部の軸線方向上端部から該タンパーエビデント裾部の内周面下端まで半径方向外方に傾斜する円錐台形状であり、
該タンパーエビデント裾部の該内周面下端部の傾斜角度は該タンパーエビデント裾部の外周面の該円錐台形状部の傾斜角度よりも小さく、該タンパーエビデント裾部の下端部の厚さは増大せしめられている、ことを特徴とする合成樹脂製容器蓋が提供される。 That is, according to the present invention, the synthetic resin container lid that achieves the above technical problem comprises a circular top wall and a cylindrical skirt wall that hangs down from the periphery of the top wall, and the skirt wall has a circumferential direction. The skirt wall is partitioned into a main portion above the break line and a tamper evidence hem below the break line, and an inner peripheral surface of the main portion is formed on the inner peripheral surface of the main portion. A female thread is formed, and a plurality of locking ridges extending in the circumferential direction at intervals in the circumferential direction or one locking extending continuously in the circumferential direction on the inner circumferential surface of the tamper evidence skirt In a synthetic resin container lid in which locking means composed of ridges are arranged,
The lower end portion of the outer peripheral surface of the tamper evidence skirt includes a truncated cone-shaped portion inclined downward in the radial direction toward the lower side,
The inner peripheral surface lower end of the tamper evident bottom portion, Ri frustoconical der inclined radially outwardly from the axial direction upper end of the frustoconical portion to the inner peripheral surface lower end of the tamper evident bottom portion ,
The inclination angle of the lower end portion of the inner peripheral surface of the tamper evidence skirt is smaller than the inclination angle of the frustoconical shape portion of the outer peripheral surface of the tamper evidence skirt, and the thickness of the lower end portion of the tamper evidence skirt portion A synthetic resin container lid is provided, characterized in that the thickness is increased .

本発明の合成樹脂製容器蓋によれば、タンパーエビデント裾部の内周面下端部は下方に向かって半径方向外方に傾斜する円錐台形状であることに起因して、タンパーエビデント裾部の下端が口頸部の雄螺条の上面に当接した時にタンパーエビデント裾部の下端部が半径方向内方ではなくて半径方向外方に誘導変位され、かくしてスカート壁のタンパーエビデント裾部の厚さが相当薄い場合でも、容器の口頸部を密封するために容器の口頸部に容器蓋を被嵌して閉方向に回転せしめる際に、タンパーエビデント裾部の下端部が半径方向内方に変位して内側に巻き込まれることが充分確実に回避される。   According to the synthetic resin container lid of the present invention, the lower end portion of the inner peripheral surface of the tamper evidence skirt has a truncated cone shape that is inclined outward in the radial direction. The lower end of the tamper evidence skirt is inducted and displaced radially outward rather than radially inward when the lower end of the butt is in contact with the upper surface of the male thread of the mouth and neck, and thus the tamper evidence of the skirt wall The bottom end of the tamper-evident hem when the container lid is fitted on the container neck and rotated in the closing direction to seal the container neck and neck even when the hem is considerably thin Is reliably prevented from being displaced radially inward and being caught inside.

本発明に従って構成された合成樹脂製容器蓋の好適実施形態を、一部を断面で示す正面図。The front view which shows a suitable embodiment of the synthetic resin container lid comprised according to this invention in part in a cross section. 図１に示す容器蓋を容器の口頸部に装着する際のタンパーエビデント裾部の挙動を示す部分断面図。The fragmentary sectional view which shows the behavior of the tamper evidence bottom | hem part at the time of mounting | wearing the container neck shown in FIG.

以下、添付図面を参照して、本発明に従って構成された合成樹脂製容器蓋の好適実施形態について、更に詳述する。   Hereinafter, a preferred embodiment of a synthetic resin container lid constructed according to the present invention will be described in more detail with reference to the accompanying drawings.

図１を参照して説明すると、ポリエチレン又はポリプロピレンの如き適宜の合成樹脂から射出成型又は圧縮成形することができる容器蓋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形スカート壁６とを具備する。天面壁４の内面外周縁部には、下方に垂下する円筒形状の内側シール片８及び同様に下方に垂下する円筒形状の外側シール片１０が形成されている。更に、内側シール片８の外周面上端部には比較的小さい環状突条９が形成されている。   Referring to FIG. 1, a container lid 2 that can be injection-molded or compression-molded from a suitable synthetic resin such as polyethylene or polypropylene has a circular top wall 4 and a cylindrical skirt depending from the periphery of the top wall 4. Wall 6. A cylindrical inner seal piece 8 that hangs downward and a cylindrical outer seal piece 10 that also hangs downward are formed on the inner peripheral edge of the top wall 4. Furthermore, a relatively small annular ridge 9 is formed at the upper end of the outer peripheral surface of the inner seal piece 8.

スカート壁６は比較的肉厚の厚肉上部１２と比較的肉薄の薄肉下部１４を有する。薄肉下部１４の上端部には周方向に延びる破断ライン１６が形成されており、スカート壁６は破断ライン１６より上方の主部１８と破断ライン１６より下方のタンパーエビデント裾部２０とに区画されている。図示の実施形態においては、破断ライン１６は周方向に間隔をおいて周方向に延びる複数個のスリット（切り溝）２２とスリット２２間に残留せしめられている複数個の橋絡部２４とから構成されており、タンパーエビデント裾部２０は複数個の橋絡部２４を介して主部１８に接続されている。図示の実施形態においては、複数個のスリット２２の周方向長さは全て実質上同一であると共に、隣接するスリット２２の間隔、即ち橋絡部２４の周方向長さも全て実質上同一であり、複数個の橋絡部２４の横断面積は全て実質上同一である。   The skirt wall 6 has a relatively thick thick upper portion 12 and a relatively thin thin thin portion 14. A rupture line 16 extending in the circumferential direction is formed at the upper end of the thin lower portion 14, and the skirt wall 6 is divided into a main portion 18 above the rupture line 16 and a tamper evidence skirt 20 below the rupture line 16. Has been. In the illustrated embodiment, the breaking line 16 includes a plurality of slits (cut grooves) 22 extending in the circumferential direction at intervals in the circumferential direction and a plurality of bridge portions 24 remaining between the slits 22. The tamper evidence skirt portion 20 is connected to the main portion 18 via a plurality of bridging portions 24. In the illustrated embodiment, the circumferential lengths of the plurality of slits 22 are all substantially the same, and the intervals between adjacent slits 22, that is, the circumferential lengths of the bridging portions 24 are all substantially the same. The cross-sectional areas of the plurality of bridging portions 24 are all substantially the same.

スカート壁６の主部１８の外周面には、周方向に見て交互に存在する凹凸形状から構成された滑り止めローレット２６が形成されている。スカート壁６の主部１８の内周面には３条の雌螺条２８が形成されている。３条の雌螺条２８は１２０度の角度間隔をおいて配設されており、３条の雌螺条２８の各々は略１６０度の角度範囲に渡って延在せしめられている。タンパーエビデント裾部２０の外周面下端部は下方に向かって半径方向外方に傾斜する円錐台形状部３０を含み、タンパーエビデント裾部２０の下端部は厚さが増大せしめられていることが重要である。タンパーエビデント裾部２０の外周面下端部は更に、円錐台形状部３０の下方に形成される円筒形状部３２を含んでいる。所望ならば、円筒形状部３２を円錐台形状部３０に滑らかに続く円錐台形状にすることもできる。タンパーエビデント裾部２０の内周面における軸線方向略中間部には係止手段３４が形成されている。係止手段３４は周方向に等角度間隔をおいて周方向に延びる４個乃至６個、図示の実施形態においては５個、の係止突条３６から形成され、係止突条３６の各々は同一形態である。係止手段３４は、周方向に等角度間隔をおいて複数個の係止突条３６を形成することに代えて、周方向に連続して伸びる１個の係止突条から構成することもできる。係止突条３６の各々の主部（両端部を除く部分）の縦断面形状は略直角三角形状であり、略水平に半径方向内方に或いは半径方向内方に向かって幾分下方に傾斜して延出する上面を有する。タンパーエビデント裾部２０の内周面下端部は、円錐台形状部３０の軸線方向上端部からタンパーエビデント裾部２０の内周面下端まで半径方向外方に傾斜する円錐台形状にせしめられ、タンパーエビデント裾部２０の内周面下端部の傾斜角度はタンパーエビデント裾部２０の外周面の円錐台形状部３０の傾斜角度よりも小さく、タンパーエビデント裾部２０の下端部の厚さは増大せしめられていることが重要である。 On the outer peripheral surface of the main portion 18 of the skirt wall 6, a non-slip knurl 26 is formed that is configured by uneven shapes alternately present in the circumferential direction. Three female threads 28 are formed on the inner peripheral surface of the main portion 18 of the skirt wall 6. The three female threads 28 are disposed at an angular interval of 120 degrees, and each of the three female threads 28 extends over an angle range of approximately 160 degrees. The outer peripheral surface lower portion of the tamper evident bottom portion 20 includes a frustoconical portion 3 0 inclined radially outward downward, the lower end of the tamper evident bottom portion 20 are made to increase the thickness of This is very important. The lower end portion of the outer peripheral surface of the tamper evidence skirt 20 further includes a cylindrical portion 32 formed below the truncated cone portion 30. If desired, the cylindrical portion 32 can be a truncated cone shape that smoothly follows the truncated cone portion 30. A locking means 34 is formed at a substantially intermediate portion in the axial direction on the inner peripheral surface of the tamper evidence skirt 20. The locking means 34 is formed of four to six locking ridges 36 extending in the circumferential direction at equal angular intervals in the circumferential direction, and five locking ridges 36 in the illustrated embodiment. Are in the same form. Instead of forming a plurality of locking ridges 36 at equiangular intervals in the circumferential direction, the locking means 34 may be constituted by a single locking ridge extending continuously in the circumferential direction. it can. The vertical cross-sectional shape of each main portion (portion excluding both ends) of the locking protrusion 36 is a substantially right-angled triangle, and is inclined substantially horizontally downward in the radial direction or radially inward. And has an upper surface that extends . The inner peripheral surface lower end part of the data Npaebidento skirt 20, the frustoconical inclined radially outwardly from the axial direction upper end portion of the frustoconical portion 3 0 to the inner peripheral surface lower end of the tamper evident bottom portion 20 allowed is, the inclination angle of the inner peripheral surface lower portion of the tamper evident bottom portion 20 is smaller than the inclination angle of the frustoconical portion 3 0 of the outer peripheral surface of the tamper evident bottom portion 20, the lower end of the tamper evident bottom portion 20 It is important that the thickness of the part is increased.

図１には容器蓋２と共に容器の口頸部３８が二点鎖線で図示されている。ポリエチレンテレフタレートの如き適宜の合成樹脂、ガラス或いは金属薄板から形成することができる容器の口頸部３８は全体として円筒形状であり、口頸部３８の外周面には３条の雄螺条４０と雄螺条４０の下方に位置する係止あご部４２が形成されている。３条の雄螺条４０は容器蓋２における上記３条の雌螺条２６に対応して形成されており、１２０度の角度間隔をおいて配設され略１６０度の角度範囲に渡って延在せしめられている。口頸部３８の外周面には、更に、係止あご部４２の下方に位置するサポートリング４４（かかるサポートリング４４は当業者には周知の如く容器の搬送に利用される）も配設されている。   In FIG. 1, the container neck 2 of the container together with the container lid 2 is shown by a two-dot chain line. The mouth and neck portion 38 of the container which can be formed from an appropriate synthetic resin such as polyethylene terephthalate, glass or metal thin plate has a cylindrical shape as a whole, and three male threads 40 are provided on the outer peripheral surface of the mouth and neck portion 38. A locking jaw 42 is formed below the male thread 40. The three male threads 40 are formed corresponding to the three female threads 26 in the container lid 2 and are arranged at an angular interval of 120 degrees and extend over an angular range of approximately 160 degrees. It is present. Further provided on the outer peripheral surface of the mouth-and-neck portion 38 is a support ring 44 positioned below the locking jaw 42 (this support ring 44 is used for transporting containers as is well known to those skilled in the art). ing.

容器内に内容物を充填した後に口頸部３８に容器蓋２を装着して口頸部３８を密封する際には、口頸部３８に容器蓋２を被嵌せしめる。この際には、最初に、図２に実線で図示する如く、スカート壁６の下端が雄螺条４０の上面に当接せしめられる。そして容器蓋２を、必要に応じて閉回転方向（図１において上方から見て時計方向）に回転しながら、更に下方に強制せしめると、スカート壁６の内周面下端部が下方に向かって半径方向外方に傾斜する円錐台形状であることに起因して、スカート壁６の下端部が図２に二点鎖線で図示する如く半径方向外方に誘導変位せしめられ、かくしてスカート壁６の下端部が半径方向内方に変位して内側に巻き込まれることが充分確実に回避される。容器蓋２を更に下方に強制せしめると、係止突条３６が雄螺条４０を弾性的に乗り越える。図示の実施形態においては、スカート壁６の下端部が円錐台形状部３０及び円筒形状部３２を含むことで厚さが増大されており、かかる事実からもスカート壁６の下端部が半径方向内方に変位して内側に巻き込まれることが防止される。容器蓋２を更に閉回転方向に回転せしめると、容器蓋２の雌螺条２８が口頸部３８の雄螺条４０に螺合せしめられる。図１に示す状態まで雌螺条２８を雄螺条４０に螺合せしめると、容器蓋２の内側シール片８が口頸部３８内に進入して口頸部３８の内周面に密接され、環状突条９が口頸部３８の頂面に密接せしめられ、外側シール片１０が口頸部３８の外周面に密接せしめられ、かくして口頸部３８が密封される。タンパーエビデント裾部２０の内周面に配設されている係止突条３６は口頸部３８の係止あご部４２を弾性的に（即ちタンパーエビデント裾部２０の弾性変形乃至変位によって）乗り越えて係止あご部４２の下方に位置する。   When the container lid 2 is attached to the mouth / neck portion 38 and the mouth / neck portion 38 is sealed after the contents are filled in the container, the container lid 2 is fitted on the mouth / neck portion 38. In this case, first, the lower end of the skirt wall 6 is brought into contact with the upper surface of the male thread 40 as shown by a solid line in FIG. When the container lid 2 is further forced downward while rotating in the closed rotation direction (clockwise as viewed from above in FIG. 1) as necessary, the lower end portion of the inner peripheral surface of the skirt wall 6 faces downward. Due to the frustoconical shape that is inclined radially outward, the lower end portion of the skirt wall 6 is inductively displaced radially outward as shown by a two-dot chain line in FIG. It is sufficiently reliably avoided that the lower end is displaced inward in the radial direction and caught inside. When the container lid 2 is further forced downward, the locking protrusion 36 elastically climbs over the male thread 40. In the illustrated embodiment, the thickness of the skirt wall 6 is increased by including the frustoconical portion 30 and the cylindrical portion 32, and from this fact, the lower end portion of the skirt wall 6 is radially inward. It is prevented from being displaced inward and being caught inside. When the container lid 2 is further rotated in the closing rotation direction, the female thread 28 of the container lid 2 is screwed into the male thread 40 of the mouth and neck portion 38. When the female thread 28 is screwed onto the male thread 40 to the state shown in FIG. 1, the inner seal piece 8 of the container lid 2 enters the mouth neck portion 38 and is brought into close contact with the inner peripheral surface of the mouth neck portion 38. The annular protrusion 9 is brought into intimate contact with the top surface of the mouth and neck portion 38, and the outer seal piece 10 is brought into intimate contact with the outer peripheral surface of the mouth and neck portion 38, thus sealing the mouth and neck portion 38. The locking ridge 36 provided on the inner peripheral surface of the tamper evidence skirt 20 elastically moves the locking jaw 42 of the mouth neck portion 38 (that is, by elastic deformation or displacement of the tamper evidence skirt 20). ) It gets over and is located below the locking jaw 42.

内容物を消費するために口頸部３８を開封する際には、容器蓋２を開方向（即ち図１において上方から見て反時計方向）に回転せしめる。容器蓋２の係止突条３６が口頸部３８の係止あご部４２に係止せしめられる故に、タンパーエビデント裾部２０の上昇が阻止され、破断ライン１６、更に詳しくはその橋絡部２４に応力が生成され、破断ライン１６が破断されてタンパーエビデント裾部２０がスカート壁６の主部１８から分離される。しかる後においては、容器蓋２の開方向への回転に応じて容器蓋２のタンパーエビデント裾部２０を除く部分が上昇せしめられ、タンパーエビデント裾部２０を口頸部３８に残留せしめて容器蓋２が口頸部３８から離脱され、かくして口頸部３８が開封される。   When opening the mouth and neck portion 38 to consume the contents, the container lid 2 is rotated in the opening direction (that is, counterclockwise as viewed from above in FIG. 1). Since the locking ridge 36 of the container lid 2 is locked to the locking jaw 42 of the mouth-and-neck portion 38, the tamper evidence skirt 20 is prevented from rising, and the break line 16, more specifically the bridging portion thereof, is prevented. Stress is generated at 24, the break line 16 is broken, and the tamper evidence skirt 20 is separated from the main portion 18 of the skirt wall 6. Thereafter, as the container lid 2 rotates in the opening direction, the portion of the container lid 2 excluding the tamper evidence skirt 20 is raised, and the tamper evidence skirt 20 remains on the mouth and neck 38. The container lid 2 is detached from the mouth and neck portion 38, and thus the mouth and neck portion 38 is opened.

図示の実施形態においては、口頸部３８の開封の際には破断ライン１６が周方向全体に渡って破断され、タンパーエビデント裾部２０がスカート壁６の主部１８から完全に分離されるが、所望ならばタンパーエビデント裾部２０に軸線方向に延びる付加破断ラインを形成し、口頸部３８を開封する際には破断ライン１６における橋絡部が局部的に破断されることなく残留せしめられてタンパーエビデント裾部２０はスカート壁６の主部１８に接続され続け、タンパーエビデント裾部２０の付加破断ラインが破断されてタンパーエビデント裾部２０が無端環状から有端環状に展開されて係止あご部４２に対する係止突条３６の係止が解除され、タンパーエビデント裾部２０を含む容器蓋２の全体が口頸部３８から離脱されるようになすこともできる。   In the illustrated embodiment, when the mouth and neck portion 38 is opened, the breaking line 16 is broken over the entire circumferential direction, so that the tamper evidence skirt portion 20 is completely separated from the main portion 18 of the skirt wall 6. However, if desired, an additional fracture line extending in the axial direction is formed in the tamper evidence skirt 20, and when opening the mouth neck portion 38, the bridge portion in the fracture line 16 remains without being locally broken. The tamper evidence skirt 20 continues to be connected to the main portion 18 of the skirt wall 6 and the additional break line of the tamper evidence skirt 20 is broken to change the tamper evidence skirt 20 from an endless ring to an end ring. When deployed, the locking projection 36 is released from the locking jaw 42 and the entire container lid 2 including the tamper evidence skirt 20 is detached from the mouth-and-neck 38. That.

２：容器蓋
４：天面壁
６：スカート壁
１６：破断ライン
１８：主部
２０：タンパーエビデント裾部
２２：スリット
２４：橋絡部
２８：雌螺条
３０：円錐台形状部
３４：係止手段
３６：係止突条
３８：口頸部
４０：雄螺条
４２：係止あご部 2: Container lid 4: Top wall 6: Skirt wall 16: Break line 18: Main part 20: Tamper evidence hem part 22: Slit 24: Bridge part 28: Female thread 30: Frustum shaped part 34: Locking Means 36: Locking ridge 38: Mouth and neck 40: Male thread 42: Locking jaw

Claims (1)

円形天面壁と該天面壁の周縁から垂下する円筒形スカート壁とを具備し、該スカート壁には周方向に延びる破断ラインが形成されていて、該スカート壁は該破断ラインより上方の主部と該破断ラインより下方のタンパーエビデント裾部とに区画されており、該主部の内周面には雌螺条が形成され、該タンパーエビデント裾部の内周面には周方向に間隔をおいて周方向に延びる複数個の係止突条或いは周方向に連続して延びる１個の係止突条から構成された係止手段が配設されている合成樹脂製容器蓋において、
該タンパーエビデント裾部の外周面下端部は下方に向かって半径方向外方に傾斜する円錐台形状部を含み、
該タンパーエビデント裾部の内周面下端部は、該円錐台形状部の軸線方向上端部から該タンパーエビデント裾部の内周面下端まで半径方向外方に傾斜する円錐台形状であり、
該タンパーエビデント裾部の該内周面下端部の傾斜角度は該タンパーエビデント裾部の外周面の該円錐台形状部の傾斜角度よりも小さく、該タンパーエビデント裾部の下端部の厚さは増大せしめられている、ことを特徴とする合成樹脂製容器蓋。 A circular skirt wall and a cylindrical skirt wall depending from the periphery of the top wall, and a rupture line extending in the circumferential direction is formed in the skirt wall, and the skirt wall is a main portion above the rupture line. And a tamper-evidence skirt portion below the break line, a female thread is formed on the inner peripheral surface of the main portion, and a circumferential direction is formed on the inner peripheral surface of the tamper-evident hem portion. In the synthetic resin container lid in which locking means composed of a plurality of locking protrusions extending in the circumferential direction at intervals or one locking protrusion extending continuously in the circumferential direction is disposed,
The lower end portion of the outer peripheral surface of the tamper evidence skirt includes a truncated cone-shaped portion inclined downward in the radial direction toward the lower side,
The inner peripheral surface lower end of the tamper evident bottom portion, Ri frustoconical der inclined radially outwardly from the axial direction upper end of the frustoconical portion to the inner peripheral surface lower end of the tamper evident bottom portion ,
The inclination angle of the lower end portion of the inner peripheral surface of the tamper evidence skirt is smaller than the inclination angle of the frustoconical shape portion of the outer peripheral surface of the tamper evidence skirt, and the thickness of the lower end portion of the tamper evidence skirt portion A synthetic resin container lid, characterized in that the thickness is increased .
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JPS58502165A (en) * 1981-12-23 1983-12-15 アンステイテユ・パストウ−ル Method of detecting the presence of a nucleic acid sequence using a modified nucleic acid probe that can be recognized by a specific antibody
JPS58160258A (en) * 1983-01-06 1983-09-22 日本クラウンコルク株式会社 Vessel cover made of synthetic resin having pilfer-proof characteristic
JPH0620904B2 (en) * 1984-02-27 1994-03-23 日本クラウンコルク株式会社 Synthetic resin container lid having pilfer-proof characteristics
JPS6127846U (en) * 1984-07-26 1986-02-19 株式会社 柴崎製作所 Synthetic resin cap
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JPH0627592U (en) * 1992-09-07 1994-04-12 株式会社柴崎製作所 Pill fur proof cap
US5356019A (en) * 1992-10-14 1994-10-18 Crown Cork & Seal Company, Inc. Tamper indicating plastic closure
CA2107041A1 (en) * 1993-02-09 1994-08-10 Jose Carvalheiro Stopper device for recipient
JP3298057B2 (en) * 1994-05-17 2002-07-02 日本クラウンコルク株式会社 Synthetic resin container lid
JP2003200951A (en) * 2001-10-31 2003-07-15 Masao Horiie Cap for container
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