JP7466827B2 - Plastic container lid - Google Patents
Plastic container lid Download PDFInfo
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- JP7466827B2 JP7466827B2 JP2020000813A JP2020000813A JP7466827B2 JP 7466827 B2 JP7466827 B2 JP 7466827B2 JP 2020000813 A JP2020000813 A JP 2020000813A JP 2020000813 A JP2020000813 A JP 2020000813A JP 7466827 B2 JP7466827 B2 JP 7466827B2
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- container lid
- main body
- locking
- mouth
- tamper
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- 230000002093 peripheral effect Effects 0.000 claims description 26
- 229920003002 synthetic resin Polymers 0.000 claims description 26
- 239000000057 synthetic resin Substances 0.000 claims description 26
- 230000004323 axial length Effects 0.000 description 6
- -1 polyethylene Polymers 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
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- Closures For Containers (AREA)
Description
本発明は、口頸部の外周面には雄螺条及びこの雄螺条の下方に位置する係止あご部が形成されている容器に適用され、容器の口頸部を開封した後においても容器蓋の全体が容器の口頸部から分離されることがない、タンパーエビデント特性を備えた合成樹脂製容器蓋に関する。 The present invention relates to a synthetic resin container lid that is applied to a container in which a male thread is formed on the outer circumferential surface of the neck of the container and a locking jaw portion located below the male thread, and that has tamper-evident properties such that the entire container lid will not be separated from the neck of the container even after the neck of the container is opened.
口頸部の外周面には雄螺条及びこの雄螺条の下方に位置する係止あご部が形成されている容器に適用される合成樹脂製容器蓋として、下記特許文献１乃至３には、天面壁及びこの天面壁の周縁から垂下する筒状スカート壁を有し、スカート壁の内周面には口頸部の雄螺条に螺合せしめられる雌螺条が形成されている本体と、周方向に間隔をおいて配設された複数個の破断橋絡部を介して該本体の該スカート壁に接続され、内周面には係止あご部に係止せしめられる係止手段が配設されている筒状タンパーエビデント裾部と、を含む形態の合成樹脂製容器蓋が開示されている。係止手段は周方向に間隔をおいて配設され且つタンパーエビデント裾部に接続された基端から上方及び半径方向内方に延出する複数個の係止片又は周方向に連続して延在し且つタンパーエビデント裾部に接続された基端から上方及び半径方向内方に延出する１個の係止片から構成されている。更に、本体のスカート壁には下方に突出する突出片が配設されており、突出片の周方向片側又は両側には、本体のスカート壁とタンパーエビデント裾部とを接続し且つタンパーエビデント裾部に対する本体の上方への移動を許容する非破断接続片が配設されている。 As a synthetic resin container lid for a container having a male thread on the outer peripheral surface of the neck and a locking jaw located below the male thread, the following Patent Documents 1 to 3 disclose a synthetic resin container lid including a main body having a top wall and a cylindrical skirt wall hanging from the periphery of the top wall, the inner peripheral surface of the skirt wall having a female thread that is screwed onto the male thread of the neck, and a cylindrical tamper-evident hem connected to the skirt wall of the main body via a plurality of break bridges arranged at intervals in the circumferential direction, and having a locking means arranged on the inner peripheral surface to be locked to the locking jaw. The locking means is composed of a plurality of locking pieces arranged at intervals in the circumferential direction and extending upward and radially inward from a base end connected to the tamper-evident hem, or a single locking piece that extends continuously in the circumferential direction and extends upward and radially inward from a base end connected to the tamper-evident hem. Furthermore, a protruding piece that protrudes downward is arranged on the skirt wall of the main body, and a non-breakable connecting piece that connects the skirt wall of the main body to the tamper-evident hem and allows the main body to move upward relative to the tamper-evident hem is arranged on one or both circumferential sides of the protruding piece.
上記のとおりの容器蓋を容器の口頸部に装着して口頸部を密封する際には、口頸部に容器蓋を被嵌して閉方向に回転し、容器蓋の雌螺条を口頸部の雄螺条に螺合せしめる。螺合の進行に応じて口頸部に対して容器蓋が下降され、タンパーエビデント裾部に形成されている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位置せしめられる。口頸部を開封する際には、容器蓋を開方向に回転せしめて口頸部の雄螺条と容器蓋の雌螺条との螺合を解除する。螺合の解除に応じて容器蓋の本体は口頸部に対して上昇されるが、タンパーエビデント裾部は係止手段が口頸部の係止あご部に係止することによって上昇が阻止され、従って破断橋絡部に応力が生成され破断橋絡部が破断される。破断橋絡部が破断された後に本体が上昇を続け、タンパーエビデント裾部から本体が上方に離隔されると、これに応じて非破断接続片が変形せしめられるが、非破断接続片が破断されることはなくタンパーエビデント裾部は口頸部に装着され続け、本体が口頸部から離脱された後においても本体は非破断接続片を介してタンパーエビデント裾部に接続させ続け、従って容器の口頸部から分離されることはない。容器蓋の本体が口頸部から離脱された後においては、非破断接続片の所定部位を旋回中心として容器蓋の本体が口頸部から離隔する方向に旋回される。そして、容器蓋の本体が所定角度を超えて旋回されると、スカート壁に形成されている突出片の先端部が口頸部の係止あご部を弾性的に乗り越えて係止あご部の上面側に位置し、これによって本体が口頸部に接近する方向に戻ることが阻止され、本体は口頸部から離隔した位置に保持され、口頸部が開封された状態に維持させる。突出片の先端部が係止あご部を弾性的に乗り越える際には、突出片が弾性的に変形し次いで弾性的に復元することに起因して音が発生され、これによって消費者は容器蓋の本体が所要開位置まで旋回されたことを認識することができる。 When the container lid described above is attached to the mouth and neck of a container to seal the mouth and neck, the container lid is fitted over the mouth and neck and rotated in the closing direction to screw the female thread of the container lid onto the male thread of the mouth and neck. As the screwing progresses, the container lid is lowered relative to the mouth and neck, and the locking means formed on the tamper-evident hem elastically overcomes the locking jaw of the mouth and neck and is positioned below it. When the mouth and neck is opened, the container lid is rotated in the opening direction to release the screwing between the male thread of the mouth and neck and the female thread of the container lid. As the screwing is released, the main body of the container lid is raised relative to the mouth and neck, but the tamper-evident hem is prevented from rising by the locking means locking onto the locking jaw of the mouth and neck, so that stress is generated in the fracture bridge and the fracture bridge breaks. When the main body continues to rise after the break bridge is broken and the main body is separated upward from the tamper evident bottom, the non-breakable connecting piece is deformed accordingly, but the non-breakable connecting piece is not broken and the tamper evident bottom continues to be attached to the mouth and neck part, and even after the main body is detached from the mouth and neck part, the main body continues to be connected to the tamper evident bottom part via the non-breakable connecting piece, and therefore is not separated from the mouth and neck part of the container. After the main body of the container lid is detached from the mouth and neck part, the main body of the container lid is rotated in a direction away from the mouth and neck part with a predetermined part of the non-breakable connecting piece as a rotation center. Then, when the main body of the container lid is rotated beyond a predetermined angle, the tip of the protruding piece formed on the skirt wall elastically overcomes the locking jaw part of the mouth and neck part and is positioned on the upper surface side of the locking jaw part, thereby preventing the main body from returning in a direction approaching the mouth and neck part, and the main body is held in a position away from the mouth and neck part, and the mouth and neck part is maintained in an opened state. When the tip of the protruding piece elastically overcomes the locking jaw, the protruding piece elastically deforms and then elastically returns to its original shape, generating a sound that allows the consumer to recognize that the main body of the container lid has been pivoted to the required open position.
而して、近時における環境問題及び材料コスト削減の観点から包装容器の軽量化が要請され、容器蓋においても薄肉化と共に軸線方向寸法の低減が要請されている状況において、本発明者等の経験によれば、上記のとおりの従来の容器蓋には、特に口頸部の軸線方向長さが比較的短く、これに応じて容器蓋の軸線方向寸法が比較的短い（即ち上下方向高さは比較的低い）場合、口頸部を開封するために口頸部から離脱された本体を口頸部から離隔する方向に旋回し、これによって突出片の先端部が口頸部の係止あご部を弾性的に乗り越えて係止あご部の上側に位置する際に、容器蓋の軸線方向寸法が比較的短いことに起因して突出片の延出長さも比較的短くなってしまう故に、突出片と係止あご部との相互干渉量が過小になり、（１）突出片の先端部が一旦係止あご部の上側になった後に偶発的に突出片の先端部が係止あご部の下側に戻ってしまって本体が所要開位置に維持されない傾向がある、（２）突出片が係止あご部を弾性的に乗り越える際の音の発生が不充分で消費者は本体が所要開位置まで旋回されたことを認識することができないことが少なくない、という解決すべき問題があることが判明している。 In light of recent environmental issues and the need to reduce material costs, there is a demand for lighter packaging containers, and there is also a demand for thinner container lids and reduced axial dimensions. In this situation, according to the experience of the present inventors, in the above-mentioned conventional container lids, particularly when the axial length of the mouth and neck portion is relatively short and the axial dimension of the container lid is accordingly relatively short (i.e., the vertical height is relatively low), the main body detached from the mouth and neck portion in order to open the mouth and neck portion rotates in a direction away from the mouth and neck portion, and as a result, the tip of the protruding piece elastically overcomes the locking jaw portion of the mouth and neck portion and falls on the upper side of the locking jaw portion. When the container is positioned, the extension length of the protruding piece is relatively short due to the relatively short axial dimension of the container lid, and this results in an insufficient amount of mutual interference between the protruding piece and the locking jaw. This has resulted in (1) the tip of the protruding piece having a tendency to accidentally return to the bottom of the locking jaw once it is above the locking jaw, preventing the main body from being maintained in the required open position, and (2) the sound generated when the protruding piece elastically overcomes the locking jaw is insufficient, and consumers are often unable to recognize that the main body has been rotated to the required open position.
上記問題を解決するために、本発明者等は、先に、特願２０１９－０２５６４４の明細書において、少なくとも突出片が存在する角度領域には、口頸部に容器蓋を装着した状態において口頸部の係止あご部とタンパーエビデント裾部との間に位置する延出部を係止片に形成することによって、容器蓋の軸線方向長さが比較的短い場合でも、口頸部から離脱された本体が所要開位置まで旋回されると、本体はかかる所要開位置に充分確実に維持され、そしてまた本体が所要開位置に旋回される際には消費者が聴取することができる音が充分確実に発生されるようにすることを提案した。 In order to solve the above problem, the inventors previously proposed in the specification of Japanese Patent Application No. 2019-025644 that, in at least the angular region in which the protruding piece exists, an extension portion be formed on the locking piece that is located between the locking jaw portion of the mouth and neck portion and the tamper evident bottom portion when the container lid is attached to the mouth and neck portion, so that even if the axial length of the container lid is relatively short, when the main body is detached from the mouth and neck portion and rotated to the required open position, the main body is maintained in the required open position with sufficient reliability, and when the main body is rotated to the required open position, a sound that can be heard by the consumer is generated with sufficient reliability.
然るに、本発明者等が先に提案した合成樹脂製容器蓋も、未だ充分に満足することができるものではなく、次のとおりの問題が残留することが判明した。即ち、容器蓋の本体は、所要開位置において突出片の下部の外面が延出部の上部の外面と当接することで所要開位置に維持されるが、容器蓋の軸線方向長さが比較定短い場合には突出片の軸線方向寸法も比較的短くなるため、本体が所要開位置にあるときの、容器の口頸部に対する本体の旋回角度が充分に大きくなく、使用者が容器の口頸部の上端部に口をつけた際に、スカート壁の下端が使用者の顔面に当接してしまい使用者を不快にさせてしまう虞がある。更に、突出片の軸線方向寸法が比較的短くなることで、突出片の下部の外面が延出部の上部の外面に充分確実に当接することができなくなり、容器蓋の本体が所要開位置に維持されなくなる虞もある。 However, the synthetic resin container lid previously proposed by the inventors is not yet fully satisfactory, and it has been found that the following problems remain. That is, the main body of the container lid is maintained in the required open position by the outer surface of the lower part of the protruding piece abutting against the outer surface of the upper part of the extension part. However, when the axial length of the container lid is relatively short, the axial dimension of the protruding piece is also relatively short. Therefore, when the main body is in the required open position, the rotation angle of the main body with respect to the mouth and neck of the container is not large enough, and when a user puts his/her mouth to the upper end of the mouth and neck of the container, the lower end of the skirt wall abuts against the user's face, which may cause discomfort to the user. Furthermore, because the axial dimension of the protruding piece is relatively short, the outer surface of the lower part of the protruding piece cannot abut against the outer surface of the upper part of the extension part sufficiently and reliably, and there is a risk that the main body of the container lid will not be maintained in the required open position.
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、本発明者等が先に提案した合成樹脂製容器蓋に更に改良を加えて、容器蓋の軸線方向長さが比較的短い場合であっても、本体が所要開位置にあるときの容器の口頸部に対する本体の旋回角度を充分大きくすることができ、そして本体は所要開位置で充分確実に維持されるようにすることである。 The present invention was made in light of the above facts, and its main technical objective is to further improve the synthetic resin container lid previously proposed by the inventors, so that even if the axial length of the container lid is relatively short, the pivot angle of the body relative to the mouth and neck of the container when the body is in the required open position can be made sufficiently large, and the body can be maintained in the required open position with sufficient certainty.
本発明者等は、更に鋭意検討を加えた結果、突出片の外面に***部を形成し、口頸部に容器蓋が装着され口頸部が密封されている状態において、口頸部を開封するために本体が開方向に回転され、破断橋絡部が破断されてタンパーエビデント裾部から本体が上方に移動され、非破断接続片の所定部位を旋回中心として本体がタンパーエビデント裾部に対して所定角度を超えて旋回されると、突出片の下部が延出部を弾性的に乗り越えて、突出片の***部が延出部の外面に当接せしめられるようにすることで、上記主たる技術的課題を解決することができることを見出した。 After further intensive research, the inventors have found that the above-mentioned main technical problem can be solved by forming a raised portion on the outer surface of the protruding piece, and when the main body is rotated in the opening direction to open the neck portion with the container lid attached to the neck portion and the neck portion sealed, the breakable bridge portion breaks and the main body moves upward from the tamper-evident bottom portion, and the main body is rotated beyond a predetermined angle relative to the tamper-evident bottom portion around a predetermined portion of the unbreakable connection piece as the center of rotation, the lower part of the protruding piece elastically overcomes the extension portion, and the raised portion of the protruding piece is brought into contact with the outer surface of the extension portion.
即ち、本発明によれば、上記主たる技術的課題を達成する合成樹脂製容器蓋として、
口頸部の外周面には雄螺条及び該雄螺条の下方に位置する係止あご部が形成されている容器に適用される合成樹脂製容器蓋であって、天面壁及び該天面壁の周縁から垂下する筒状スカート壁を有し、該スカート壁の内周面には該雄螺条に螺合せしめられる雌螺条が形成されている本体と、周方向に間隔をおいて配設された複数個の破断橋絡部を介して該本体の該スカート壁に接続され、内周面には該係止あご部に係止せしめられる係止手段が配設されている筒状タンパーエビデント裾部とを含み、該係止手段は周方向に間隔をおいて配設され且つ該タンパーエビデント裾部に接続された基端から上方及び半径方向内方に延出する複数個の係止片又は周方向に連続して延在し且つ該タンパーエビデント裾部に接続された基端から上方及び半径方向内方に延出する環状の係止片から構成されており、該本体の該スカート壁には下方に突出する突出片が配設されており、そして更に該本体のスカート壁と該タンパーエビデント裾部とを接続し且つ該タンパーエビデント裾部に対する該本体の上方への移動を許容する非破断接続片が配設されている合成樹脂製容器蓋において、
少なくとも該突出片が存在する角度領域において、該係止片には該口頸部に合成樹脂製容器蓋を装着した状態において該口頸部の該係止あご部と該タンパーエビデント裾部との間に位置する延出部が形成されており、
該突出片の外面には***部が形成されており、
該口頸部に合成樹脂製容器蓋が装着され該口頸部が密封されている状態において、該口頸部を開封するために該本体が開方向に回転され、該破断橋絡部が破断されて該タンパーエビデント裾部から該本体が上方に移動され、該非破断接続片の所定部位を旋回中心として該本体が該タンパーエビデント裾部に対して所定角度を超えて旋回されると、該突出片の該下部が該延出部を弾性的に乗り越えて、該突出片の該***部が該延出部の外面に当接せしめられる、
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, a synthetic resin container lid that achieves the above-mentioned main technical object is as follows:
A synthetic resin container lid for use with a container having a male thread and a locking jaw located below the male thread formed on the outer peripheral surface of the mouth and neck, the lid including a main body having a top wall and a cylindrical skirt wall hanging down from the periphery of the top wall, the inner peripheral surface of the skirt wall having a female thread formed thereon to be screwed onto the male thread, and a cylindrical tamper evident skirt portion connected to the skirt wall of the main body via a plurality of break bridges arranged at intervals in the circumferential direction, the inner peripheral surface being provided with locking means for locking onto the locking jaw, the locking means being arranged at intervals in the circumferential direction. a plurality of locking pieces provided on a skirt wall of the main body and extending upward and radially inward from a base end connected to the tamper evident bottom portion, or a ring-shaped locking piece extending continuously in the circumferential direction and extending upward and radially inward from a base end connected to the tamper evident bottom portion, a protruding piece protruding downward is provided on the skirt wall of the main body, and a non-breakable connecting piece is further provided which connects the skirt wall of the main body and the tamper evident bottom portion and allows the main body to move upward relative to the tamper evident bottom portion,
At least in the angular region in which the protruding piece exists, the locking piece is formed with an extension portion that is located between the locking jaw portion of the mouth and neck portion and the tamper evident bottom portion when the synthetic resin container lid is attached to the mouth and neck portion,
A protuberance is formed on the outer surface of the protruding piece,
When a synthetic resin container lid is attached to the mouth and neck portion and the mouth and neck portion is sealed, the main body is rotated in the opening direction to open the mouth and neck portion, the breakable bridge portion is broken, and the main body is moved upward from the tamper-evident bottom portion, and when the main body is rotated at a predetermined angle relative to the tamper-evident bottom portion around a predetermined portion of the unbreakable connection piece as a rotation center, the lower portion of the protruding piece elastically overcomes the extending portion, and the raised portion of the protruding piece is brought into contact with the outer surface of the extending portion.
A synthetic resin container lid is provided.
好ましくは、該係止片の内面には、該口頸部に合成樹脂製容器蓋を装着した状態において、該係止あご部の下方において半径方向内方に突出する係止突起が形成されている。該延出部は該突出片が存在する角度領域以外においても形成されているのが良い。好適には、該係止手段は周方向に間隔をおいて配設され且つ該タンパーエビデント裾部に接続された基端から上方及び半径方向内方に延出する複数個の係止片から構成されており、該延出部は該係止片の各々の周方向両側部に夫々形成されている。該延出部の各々の該外面は、上方に向かって漸次半径方向外方に突出し、次いで上方に向かって漸次半径方向内方に後退するのが好ましい。この場合には、該延出部の各々の該外面における、上方に向かって漸次半径方向外方に突出する部位は縦断面において円弧状であるのがよい。該スカート壁の外周面の下端部及び該タンパーエビデント裾部の外周面の上端部には夫々、該特定領域を除いて、周方向に連続して延在する円弧形状の突条が形成されており、該***部の径方向への突出量は、該突条の径方向への突出量に対応するのが好適である。 Preferably, the inner surface of the locking piece is formed with a locking projection that projects radially inward below the locking jaw when a synthetic resin container lid is attached to the mouth and neck. The extension may also be formed in an angle region other than the angle region in which the protruding piece is present. Preferably, the locking means is composed of a plurality of locking pieces that are spaced apart in the circumferential direction and extend upward and radially inward from a base end connected to the tamper-evident bottom, and the extension is formed on both circumferential sides of each of the locking pieces. It is preferable that the outer surface of each of the extensions gradually projects radially outward toward the top and then gradually recedes radially inward toward the top. In this case, the portion of the outer surface of each of the extensions that gradually projects radially outward toward the top is preferably arc-shaped in a longitudinal section. The lower end of the outer peripheral surface of the skirt wall and the upper end of the outer peripheral surface of the tamper evident bottom portion each have an arc-shaped protrusion that extends continuously in the circumferential direction, except for the specific area, and it is preferable that the radial protrusion of the protrusion corresponds to the radial protrusion of the protrusion.
本発明の容器蓋においては、本体は突出片の外面に形成された***部が延出部の外面に当接せしめられることで所要開位置に保持されるため、容器蓋の軸線方向長さが比較的短い場合であっても、本体が所要開位置にあるときの容器の口頸部に対する本体の旋回角度を大きくすることができる。更に、***部が充分確実に延出部の外面に当接することから、本体は所要開位置で充分確実に維持される。 In the container lid of the present invention, the main body is held in the required open position by the protrusion formed on the outer surface of the protruding piece abutting against the outer surface of the extension, so that even if the axial length of the container lid is relatively short, the rotation angle of the main body relative to the mouth and neck of the container when the main body is in the required open position can be made large. Furthermore, because the protrusion abuts against the outer surface of the extension with sufficient certainty, the main body is maintained with sufficient certainty in the required open position.
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。 Below, a preferred embodiment of a synthetic resin container lid constructed according to the present invention will be described in further detail with reference to the attached drawings.
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図示している図１乃至図４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形又は圧縮成形によって好都合に一体成形することができる、全体を番号２で示す容器蓋は、本体４とタンパーエビデント裾部６とを含んでいる。本体４は円形天面壁８とこの天面壁８の周縁から垂下する円筒形状のスカート壁１０を有する。天面壁８の内面の外周縁部には２条のシール突条、即ち内側環状突条１２及び外側環状突条１４が形成されている。天面壁８の内面の中央領域には変形防止手段１５が設けられている。変形防止手段１５は、天面壁８の内面中央において下方に突出する突部１５ａと、この突部１５ａの外周面から放射状に延びる複数（図示の実施形態においては８本）のリブ１５ｂと、リブ１５ｂの径方向外側端が内周面に接続される円環突条１５ｃとから構成されている。変形防止手段１５の存在に起因して天面壁８の剛性は増大せしめられ、これにより、容器内に例えば炭酸飲料を収容して容器の口頸部を容器蓋２で密封することで容器内が陽圧となる場合であっても、天面壁８の変形が防止される。スカート壁１０の外周面の上下方向中間部にはそこに掛けられる指の滑りを防止するための凹凸１６が繰り返し形成されている。スカート壁１０の外周面の下端部には、後述する特定領域を除いて、下端縁に沿って周方向に連続して延在する突条１７が円弧形状に形成されている。突条１７の径方向外方への突出量については後述する。スカート壁１０の内周面には雌螺条１８が形成されている。この雌螺条１８には周方向に間隔をおいて切欠２０が形成されている。 1 to 4, which show a preferred embodiment of a synthetic resin container lid constructed according to the present invention, the container lid, generally designated by the number 2, which can be conveniently integrally molded by injection molding or compression molding from an appropriate synthetic resin such as polyethylene or polypropylene, includes a main body 4 and a tamper-evident skirt portion 6. The main body 4 has a circular top wall 8 and a cylindrical skirt wall 10 that hangs down from the periphery of the top wall 8. Two sealing ridges, namely an inner annular ridge 12 and an outer annular ridge 14, are formed on the outer peripheral edge of the inner surface of the top wall 8. A deformation prevention means 15 is provided in the central region of the inner surface of the top wall 8. The deformation prevention means 15 is composed of a protrusion 15a that protrudes downward at the center of the inner surface of the top wall 8, a plurality of ribs 15b (eight in the illustrated embodiment) that extend radially from the outer peripheral surface of the protrusion 15a, and an annular ridge 15c whose radially outer ends are connected to the inner peripheral surface. The rigidity of the top wall 8 is increased due to the presence of the deformation prevention means 15, and thus deformation of the top wall 8 is prevented even when the container is filled with, for example, a carbonated beverage and the mouth and neck of the container are sealed with the container lid 2, creating a positive pressure inside the container. The skirt wall 10 has repeated unevenness 16 formed in the vertical middle of its outer circumferential surface to prevent fingers from slipping. The skirt wall 10 has a lower end with a circular arc-shaped protrusion 17 that extends continuously in the circumferential direction along the lower edge, except for a specific region described below. The amount of radial outward protrusion of the protrusion 17 will be described later. The skirt wall 10 has a female thread 18 formed on its inner circumferential surface. The female thread 18 has notches 20 formed at intervals in the circumferential direction.
タンパーエビデント裾部６は全体として円筒形状であり、後述する破断橋絡部及び一対の非破断接続片を介して本体４のスカート壁１０に接続されている。タンパーエビデント裾部６の外周面の上端部には、スカート壁１０の外周面に形成された突条１７と対応した突条２１が上端縁に沿って周方向に連続して形成されている。突条２１の径方向外方への突出量については後述する。タンパーエビデント裾部６の内周面には係止手段２２が配設されている。図示の実施形態において、係止手段２２は周方向に間隔をおいて形成された９個の弧状係止片２４ａ乃至２４ｉから構成されている。弧状係止片２４ａ乃至２４ｉの各々は、タンパーエビデント裾部６の内周面に接続された基端から軸線方向上方及び半径方向内方に延出せしめられている。図示の実施形態において係止手段２２は周方向に間隔を置いて配設された９個の弧状係止片２４ａ乃至２４ｉから構成されているが、所望ならば周方向に連続して延在しタンパーエビデント裾部６の内周面に接続された基端から軸線方向上方及び半径方向内方に延出する環状の係止片から係止手段２２を構成することもできる。 The tamper-evident hem 6 is generally cylindrical and is connected to the skirt wall 10 of the main body 4 via a broken bridge portion and a pair of non-broken connection pieces, which will be described later. At the upper end of the outer peripheral surface of the tamper-evident hem 6, a protrusion 21 corresponding to the protrusion 17 formed on the outer peripheral surface of the skirt wall 10 is formed continuously in the circumferential direction along the upper edge. The amount of radial outward protrusion of the protrusion 21 will be described later. A locking means 22 is arranged on the inner peripheral surface of the tamper-evident hem 6. In the illustrated embodiment, the locking means 22 is composed of nine arc-shaped locking pieces 24a to 24i formed at intervals in the circumferential direction. Each of the arc-shaped locking pieces 24a to 24i extends axially upward and radially inward from a base end connected to the inner peripheral surface of the tamper-evident hem 6. In the illustrated embodiment, the locking means 22 is composed of nine arc-shaped locking pieces 24a to 24i spaced apart in the circumferential direction, but if desired, the locking means 22 can also be composed of annular locking pieces that extend continuously in the circumferential direction and extend axially upward and radially inward from a base end connected to the inner peripheral surface of the tamper-evident skirt 6.
本発明に従って構成された容器蓋２においては、少なくとも後述する突出片３４が形成されている領域において、係止片２４ａ乃至２４ｉの先端から延出する延出部２６が形成されている。図示の実施形態においては、係止片２４ａ乃至２４ｉの各々において、周方向両側部から延出する矩形状の２個の延出部２６が形成されている。図３及び図４と共に図９を参照することによって明確に理解されるとおり、延出部２６の各々の外面は、上方に向かって漸次半径方向外側に突出し、次いで上方に向かって漸次半径方向内方に後退しているのが好ましい。そして更に、上方に向かって漸次半径方向外側に突出する部位２６ａは縦断面図において円弧状であるのが好ましい。延出部２６の各々の内面は平坦な面でよい。係止片２４ａ乃至２４ｉの各々の主部、即ち延出部２６以外の部位の内面には、半径方向内側に突出する係止突起２８が形成されているのが望ましい。かかる係止突起２８は上方に向かって漸次突出量が増大し、上面は実質上水平に延在するのが好適である。係止突起２８の各々は係止片２４ａ乃至２４ｉの各々における周方向中央部、即ち上記延出部２６が存在しない部分に形成されている。所望ならば、係止片２４ａ乃至２４ｉの各々の周方向全体に渡って係止突起２８を形成することもできる。 In the container lid 2 constructed according to the present invention, at least in the region where the protruding piece 34 described later is formed, the extension portion 26 extending from the tip of the locking piece 24a to 24i is formed. In the illustrated embodiment, two rectangular extension portions 26 extending from both circumferential sides are formed in each of the locking pieces 24a to 24i. As can be clearly understood by referring to FIG. 9 together with FIG. 3 and FIG. 4, it is preferable that the outer surface of each of the extension portions 26 gradually protrudes radially outward toward the upper side, and then gradually recedes radially inward toward the upper side. Furthermore, it is preferable that the portion 26a that gradually protrudes radially outward toward the upper side is arc-shaped in the vertical cross section. The inner surface of each of the extension portions 26 may be a flat surface. It is preferable that the main portion of each of the locking pieces 24a to 24i, i.e., the inner surface of the portion other than the extension portion 26, has an engagement projection 28 protruding radially inward. It is preferable that the locking projections 28 gradually increase in amount as they protrude upward, and that the upper surface extends substantially horizontally. Each of the locking projections 28 is formed in the circumferential center of each of the locking pieces 24a to 24i, i.e., in a portion where the above-mentioned extension portion 26 does not exist. If desired, the locking projections 28 can be formed over the entire circumferential direction of each of the locking pieces 24a to 24i.
図２乃至図４を参照して説明を続けると、番号３０で示す特定領域において、本体４のスカート壁１０の下端縁（後述する突出片３４が接続される端縁）は他の領域の下端縁よりも上方に変位せしめられており、またタンパーエビデント裾部６の上端縁（後述する突出片３４の下端縁と対向する端縁）は他の領域の上端縁よりも下方に変位せしめられており、スカート壁１０とタンパーエビデント裾部６との間には正面図において横長に延びる開口３２が生成されている。開口３２の周方向中央部において、スカート壁１０にはその下端から下方に突出する略矩形状の突出片３４が形成されている。図２と共に図９を参照することによって明確に理解される如く、突出片３４は実質上垂直に垂下している。ここで、本発明に従って構成された容器蓋２においては、突出片３４の外面には***部３５が形成されていることが重要である。図１及び図５を参照することによって理解されるとおり、***部３５は突出片３４の外面の下半部において周方向全域に亘って形成されている。所望ならば、***部３５は突出片３４の外面の上下方向全域に亘って形成されていてもよい。***部３５の断面形状は略矩形であって、その径方向への突出量は、スカート壁１０及びタンパーエビデント裾部６の外周面に夫々形成された突条１７及び突条２１の径方向への突出量と対応している。図示の実施形態においては、***部３５、突条１７、及び突条２１の径方向への突出量は実質上同一である。それ故に、容器蓋２が単体又は容器の口頸部に装着された状態で搬送される際に、***部３５の周方向両端面に何らかの部材が引っかかってしまうことが可及的に防止される。更に、上下方向に見て、***部３５の上端と突条１７の上端とは実質上同高に位置している。 2 to 4, in a specific region indicated by the number 30, the lower edge of the skirt wall 10 of the main body 4 (the edge to which the protruding piece 34 described later is connected) is displaced upward from the lower edges of the other regions, and the upper edge of the tamper-evident bottom portion 6 (the edge facing the lower edge of the protruding piece 34 described later) is displaced downward from the upper edges of the other regions, and an opening 32 extending horizontally in the front view is generated between the skirt wall 10 and the tamper-evident bottom portion 6. At the circumferential center of the opening 32, the skirt wall 10 is formed with a substantially rectangular protruding piece 34 protruding downward from its lower end. As can be clearly understood by referring to FIG. 9 together with FIG. 2, the protruding piece 34 hangs down substantially vertically. Here, it is important that in the container lid 2 constructed according to the present invention, a protruding piece 34 has a protruding portion 35 formed on the outer surface thereof. As can be understood by referring to FIG. 1 and FIG. 5, the raised portion 35 is formed over the entire circumferential area in the lower half of the outer surface of the protruding piece 34. If desired, the raised portion 35 may be formed over the entire vertical area of the outer surface of the protruding piece 34. The cross-sectional shape of the raised portion 35 is substantially rectangular, and its radial protrusion amount corresponds to the radial protrusion amount of the protrusion 17 and the protrusion 21 formed on the outer peripheral surface of the skirt wall 10 and the tamper evident bottom portion 6, respectively. In the illustrated embodiment, the radial protrusion amounts of the raised portion 35, the protrusion 17, and the protrusion 21 are substantially the same. Therefore, when the container lid 2 is transported alone or attached to the mouth and neck of the container, it is possible to prevent any member from getting caught on both circumferential end faces of the raised portion 35 as much as possible. Furthermore, when viewed in the vertical direction, the upper end of the raised portion 35 and the upper end of the protrusion 17 are located at substantially the same height.
図２及び図３に明確に図示するとおり、上記特定領域３０においては、上記突出片３４に隣接してその周方向両側に一対の非破断接続片３８ａ及び３８ｂが配設されている。図示の実施形態における非破断接続片３８ａは、スカート壁１０の下端縁に接続された上端部４０ａ、この上端部４０ａに続いて周方向片側（図２及び図３において右側）に実質上水平に延びる第一の傾動部４２ａ、中間部４４ａ、中間部４４ａに続いて第一の傾動部４２ａの下方を周方向他側（図２及び図３において左側）に実質上水平に延びてタンパーエビデント裾部６に接続されている第二の傾動部４６ａから構成されている。非破断接続片３８ｂも、スカート壁１０の下端縁に接続された上端部４０ｂ、この上端部４０ｂに続いて周方向片側（図２及び図３において左側）に実質上水平に延びる第一の傾動部４２ｂ、中間部４４ｂ、中間部４４ｂに続いて第一の傾動部４２ｂの下方を周方向他側（図２及び図３において右側）に実質上水平に延びてタンパーエビデント裾部６に接続されている第二の傾動部４６ｂから構成されている。所望ならば、非破断接続片３８ａにおける第一の傾動部４２ａ及び第二の傾動部４６ａ並びに非破断接続片３８ｂにおける第一の傾動部４２ｂ及び第二の傾動部４６ｂを実質上水平ではなく所定方向に傾斜せしめることもできる。図２を参照することによって明確に理解される如く、非破断接続片３８ａと非破断接続片３８ｂとは線対称ではなく構成要素の周方向寸法が幾分相違せしめられている（この理由については上記特許文献２の記載を参照されたい）。 2 and 3, in the specific region 30, a pair of non-breakable connecting pieces 38a and 38b are disposed adjacent to the protruding piece 34 on both sides in the circumferential direction. In the illustrated embodiment, the non-breakable connecting piece 38a is composed of an upper end 40a connected to the lower edge of the skirt wall 10, a first tilted portion 42a extending substantially horizontally from the upper end 40a to one circumferential side (the right side in FIGS. 2 and 3), an intermediate portion 44a, and a second tilted portion 46a extending substantially horizontally from the intermediate portion 44a to the other circumferential side (the left side in FIGS. 2 and 3) below the first tilted portion 42a and connected to the tamper-evident hem 6. The unbreakable connecting piece 38b is also composed of an upper end portion 40b connected to the lower edge of the skirt wall 10, a first tilted portion 42b extending substantially horizontally from the upper end portion 40b to one circumferential side (the left side in Figs. 2 and 3), an intermediate portion 44b, and a second tilted portion 46b extending substantially horizontally from the intermediate portion 44b to the other circumferential side (the right side in Figs. 2 and 3) below the first tilted portion 42b and connected to the tamper-evident skirt portion 6. If desired, the first tilted portion 42a and the second tilted portion 46a of the unbreakable connecting piece 38a and the first tilted portion 42b and the second tilted portion 46b of the unbreakable connecting piece 38b can be tilted in a predetermined direction rather than being substantially horizontal. As can be clearly understood by referring to FIG. 2, the non-breakable connection pieces 38a and 38b are not linearly symmetrical, and the circumferential dimensions of the components are slightly different (for the reason for this, see the description in Patent Document 2 above).
番号３０で示す特定領域即ち突出片３４並びに一対の非破断接続片３８ａ及び３８ｂが存在する領域以外の領域においては、タンパーエビデント裾部６を本体４のスカート壁１０の下端に接続する複数個の破断橋絡部４８が周方向に間隔をおいて複数個配設されている。図示の実施形態においては、スカート壁１０の内面及びタンパーエビデント裾部６の内面に渡って軸線方向に延びる幅狭突条が周方向に間隔を置いて６個形成されており、かかる幅狭突条におけるスカート壁１０とタンパーエビデント裾部６との間に位置する部分が破断橋絡部４８を構成している（図３を参照されたい）。所望ならば、一対の非破断接続片３８ａ及び３８ｂが存在する領域においても、例えば第一の傾動部４２ａ及び４２ｂとスカート壁１０との間或いは第二の傾動部４６ａ及び４６ｂとタンパーエビデント裾部６との間に或いは突出片３４とタンパーエビデント裾部６との間に破断橋絡部を配設することもできる。 In the specific region indicated by the number 30, i.e., in the region other than the region where the protruding piece 34 and the pair of non-breakable connecting pieces 38a and 38b are present, a plurality of break bridges 48 that connect the tamper-evident bottom 6 to the lower end of the skirt wall 10 of the main body 4 are arranged at intervals in the circumferential direction. In the illustrated embodiment, six narrow ridges are formed at intervals in the circumferential direction, extending axially across the inner surface of the skirt wall 10 and the inner surface of the tamper-evident bottom 6, and the portion of the narrow ridges located between the skirt wall 10 and the tamper-evident bottom 6 constitutes the break bridges 48 (see FIG. 3). If desired, even in the region where the pair of non-breakable connecting pieces 38a and 38b exist, a breakable bridge can be provided, for example, between the first tilting portions 42a and 42b and the skirt wall 10, or between the second tilting portions 46a and 46b and the tamper-evident hem 6, or between the protruding piece 34 and the tamper-evident hem 6.
図５には、容器蓋２と共に容器の口頸部５０も図示されている。ポリエチレンテレフタレートの如き適宜の合成樹脂或いはガラスから形成することができる容器の口頸部５０は全体として円筒形状であり、その上面は開口されている。口頸部５０の外周面には、雄螺条５２とこの雄螺条５２の下方に位置する係止あご部５４が形成されている。 Figure 5 also shows the container neck 50 along with the container lid 2. The container neck 50, which can be made from a suitable synthetic resin such as polyethylene terephthalate or glass, is generally cylindrical in shape and has an open top. A male thread 52 and a locking jaw 54 located below the male thread 52 are formed on the outer periphery of the neck 50.
口頸部５０に容器蓋２を装着して口頸部５０を密封する際には、口頸部５０に容器蓋２を被嵌して閉方向（図５において上方から見て時計方向）に回転せしめ、口頸部５０の雄螺条５２に容器蓋２の雌螺条１８を螺合せしめる。雄螺条５２に対する雌螺条１８の螺合の進行に応じて容器蓋２は口頸部５０に対して漸次下降する。図５に図示する状態まで口頸部５０に対して容器蓋２が下降せしめられると、容器蓋２の本体４における天面壁８の内面に形成されている内側環状突条１２及び外側環状突条１４が夫々口頸部５０の内周面及び外周面に密接せしめられ、これによって口頸部５０が密封される。容器蓋２のタンパーエビデント裾部６の内周面に配設されている係止片２４ａ乃至２４ｉの各々における主部即ち延出部２６以外の部分は、弾性的に変形して口頸部５０の係止あご部５４よりも下方に位置し、内面に形成されている係止突起２８の上面は係止あご部５４の下面に対向して位置する。一方、係止片２４ａ乃至２４ｉの各々における延出部２６は、本体４のスカート壁１０と口頸部５０の係止あご部５４との間に位置し、スカート壁１０の内周面と係止あご部５４の外周面との間に位置している。 When the container lid 2 is attached to the mouth and neck portion 50 to seal the mouth and neck portion 50, the container lid 2 is fitted over the mouth and neck portion 50 and rotated in the closing direction (clockwise as viewed from above in FIG. 5) to screw the female thread 18 of the container lid 2 into the male thread 52 of the mouth and neck portion 50. As the female thread 18 screws into the male thread 52, the container lid 2 gradually descends relative to the mouth and neck portion 50. When the container lid 2 is lowered relative to the mouth and neck portion 50 to the state shown in FIG. 5, the inner annular ridge 12 and the outer annular ridge 14 formed on the inner surface of the top wall 8 of the main body 4 of the container lid 2 are brought into close contact with the inner and outer peripheral surfaces of the mouth and neck portion 50, respectively, thereby sealing the mouth and neck portion 50. The main portion, i.e., the portion other than the extension portion 26, of each of the locking pieces 24a to 24i arranged on the inner peripheral surface of the tamper-evident bottom portion 6 of the container lid 2 is elastically deformed and positioned below the locking jaw portion 54 of the mouth and neck portion 50, and the upper surface of the locking projection 28 formed on the inner surface is positioned opposite the lower surface of the locking jaw portion 54. On the other hand, the extension portion 26 of each of the locking pieces 24a to 24i is positioned between the skirt wall 10 of the main body 4 and the locking jaw portion 54 of the mouth and neck portion 50, and is positioned between the inner peripheral surface of the skirt wall 10 and the outer peripheral surface of the locking jaw portion 54.
口頸部５０を開封する際には、容器蓋２を開方向（図５において上方から見て反時計方向）に回転せしめ、口頸部５０の雄螺条５２に対する容器蓋２の雌螺条１８の螺合を漸次解除する。螺合を漸次解除すると容器蓋２の本体４は開方向に回転せしめられると共に上昇せしめられるが、タンパーエビデント裾部６は係止片２４ａ乃至２４ｉの係止突起２８の上面が口頸部５０の係止あご部５４の下面に係止して上昇が阻止され、これに起因して破断橋絡部４８に相当な応力が生成され、破断橋絡部４８が破断される。しかる後においては、容器蓋２の本体４は開方向への回転と共に上昇し、タンパーエビデント裾部６から上方に漸次離間せしめられる。図６を参照することによって明確に理解される如く、タンパーエビデント裾部６から本体４が漸次上方に離間せしめられると、非破断接続片３８ａの第一の傾動部４２ａ及び非破断接続片３８ｂの第二の傾動部４６ｂは夫々の中間部４４ａ及び第二の傾動部４６ｂの下端を中心として図６において時計方向に旋回、即ち時計方向に傾動され、一方非破断接続片３８ａの第二の傾動片４６ａ及び非破断接続片３８ｂの第一の傾動部４２ｂは夫々の下端及び上端を中心として図６において反時計方向に旋回、即ち反時計方向に傾動され、これに応じて非破断接続片３８ａ及び３８ｂにおける第一の傾動部４２ａ及び４２ｂ並びに第二の傾動部４６ａ及び４６ｂの鉛直線に対する傾斜角度が漸次低減される。図６と共に図７を参照することによって明確に理解される如く、口頸部５０の雄螺条５４に対する容器蓋２の雌螺条１８の螺合が完全に解除されると、容器蓋２の本体４は口頸部５０から離脱される。しかしながら、本体４は非破断接続片３８ａ及び３８ｂを介して、口頸部５０に装着され続けているタンパーエビデント裾部６に接続され続けている故に、容器の口頸部５０から離間されることはない。 When opening the neck portion 50, the container lid 2 is rotated in the opening direction (counterclockwise as viewed from above in FIG. 5) to gradually release the female thread 18 of the container lid 2 from the male thread 52 of the neck portion 50. When the threads are gradually released, the main body 4 of the container lid 2 is rotated in the opening direction and raised, but the upper surface of the locking projection 28 of the locking pieces 24a to 24i is locked with the lower surface of the locking jaw portion 54 of the neck portion 50, preventing the tamper-evident hem 6 from rising, which generates considerable stress in the break bridge portion 48 and breaks the break bridge portion 48. After that, the main body 4 of the container lid 2 is raised as it rotates in the opening direction and is gradually separated upward from the tamper-evident hem 6. As can be clearly understood by referring to Figure 6, when the main body 4 is gradually moved upward away from the tamper-evident bottom portion 6, the first tilting portion 42a of the unbreakable connection piece 38a and the second tilting portion 46b of the unbreakable connection piece 38b rotate clockwise in Figure 6 around the lower ends of the respective intermediate portions 44a and second tilting portions 46b, i.e., are tilted clockwise, while the second tilting portion 46a of the unbreakable connection piece 38a and the first tilting portion 42b of the unbreakable connection piece 38b rotate counterclockwise in Figure 6 around the respective lower and upper ends, i.e., are tilted counterclockwise, and accordingly the inclination angles of the first tilting portions 42a and 42b and the second tilting portions 46a and 46b of the unbreakable connection pieces 38a and 38b with respect to the vertical line are gradually reduced. As can be clearly understood by referring to FIG. 7 together with FIG. 6, when the female thread 18 of the container lid 2 is completely released from the male thread 54 of the neck portion 50, the main body 4 of the container lid 2 is detached from the neck portion 50. However, since the main body 4 continues to be connected to the tamper-evident skirt 6 that continues to be attached to the neck portion 50 via the unbreakable connecting pieces 38a and 38b, it is not separated from the neck portion 50 of the container.
容器蓋２の本体４が口頸部５０から離脱された後においては、非破断接続片３８ａ及び３８ｂの中間部４４ａ及び４４ｂを旋回支点として本体４を口頸部５０から遠ざかる方向（図７において時計方向）に旋回する。この際、図７に示すとおり、突出片３４は、その延出端が係止片２４ａ及び２４ｉの片側部（係止片２４ａにおいては図４において左側部、係止片２４ｉにおいては図４において右側部）に当接し、弾性的に変形して係止片２４ａ及び２４ｉの外側面に沿って上昇し、次いで係止片２４ａ及び２４ｉの延出部２６（係止片２４ａにおいては図４において左側の延出部２６、係止片２４ｉにおいては図４において右側の延出部２６）の外側面における円弧状の部位２６ａに沿って上昇する。しかる後に、突出片３４の下部は延出部２６の円弧状の部位２６ａを弾性的に乗り越えて、図８及び図９に図示する如く、突出片３４の***部３５が延出部２６の外面に当接せしめられる。かくして容器蓋２の本体４は図８及び図９に図示する開位置に保持される。また、突出片３４が延出部２６の円弧状の部位２６ａを乗り越えて弾性的に復元される際には音が生成される。 After the main body 4 of the container lid 2 is detached from the neck portion 50, the main body 4 rotates in a direction away from the neck portion 50 (clockwise in FIG. 7) with the middle parts 44a and 44b of the non-breakable connecting pieces 38a and 38b as the pivot point. At this time, as shown in FIG. 7, the extension end of the protruding piece 34 abuts against one side of the locking pieces 24a and 24i (the left side in FIG. 4 for the locking piece 24a, and the right side in FIG. 4 for the locking piece 24i), elastically deforms and rises along the outer surface of the locking pieces 24a and 24i, and then rises along the arc-shaped portion 26a on the outer surface of the extension portion 26 of the locking pieces 24a and 24i (the left extension portion 26 in FIG. 4 for the locking piece 24a, and the right extension portion 26 in FIG. 4 for the locking piece 24i). Thereafter, the lower portion of the protruding piece 34 elastically overcomes the arc-shaped portion 26a of the extension portion 26, and the raised portion 35 of the protruding piece 34 abuts against the outer surface of the extension portion 26, as shown in Figures 8 and 9. Thus, the main body 4 of the container lid 2 is held in the open position shown in Figures 8 and 9. Also, when the protruding piece 34 overcomes the arc-shaped portion 26a of the extension portion 26 and elastically returns to its original position, a sound is generated.
本発明の容器蓋２においては、本体４は突出片３４の外面に形成された***部３５が延出部２６の外面に当接せしめられることで所要開位置に保持されるため、容器蓋の軸線方向長さが比較的短い場合であっても、本体４が所要開位置にあるときの容器の口頸部５０に対する本体４の旋回角度を大きくすることができる。更に、***部３５が充分確実に延出部２６の外面に当接することから、本体４は所要開位置で充分確実に維持される。 In the container lid 2 of the present invention, the main body 4 is held in the required open position by the protuberance 35 formed on the outer surface of the protruding piece 34 abutting against the outer surface of the extension 26, so that even if the axial length of the container lid is relatively short, the rotation angle of the main body 4 relative to the mouth and neck 50 of the container when the main body 4 is in the required open position can be made large. Furthermore, since the protuberance 35 abuts against the outer surface of the extension 26 sufficiently reliably, the main body 4 is maintained sufficiently reliably in the required open position.
内容物の飲食を途中で中断した場合には、図８に図示する位置に保持されている本体４を口頸部５０に接近する方向（図８において反時計方向）に強制的に旋回せしめて再び口頸部５０に被嵌し、そして容器蓋２を閉方向に回転せしめて口頸部５０の雄螺条５２に容器蓋２の雌螺条１８を螺合せしめ、かくして容器蓋２を再び図５に図示する状態に位置せしめ、口頸部５０を仮密封することができる。 If the consumption of the contents is interrupted midway, the main body 4, which is held in the position shown in Figure 8, is forcibly rotated in a direction approaching the mouth and neck portion 50 (counterclockwise in Figure 8) so that it is fitted over the mouth and neck portion 50 again, and the container lid 2 is then rotated in the closing direction so that the male thread 52 of the mouth and neck portion 50 is screwed into the female thread 18 of the container lid 2, thereby positioning the container lid 2 again in the position shown in Figure 5, and the mouth and neck portion 50 can be temporarily sealed.
以上、添付図面を参照して本発明に従って構成された容器蓋の好適実施形態について詳細に説明したが、本発明はかかる実施形態に限定されるものではなく、本発明の範囲を逸脱することなく種々の変形乃至修正が可能であることは多言を要しない。例えば、図示の実施形態においては、係止片２４ａ乃至２４ｉの各々の周方向両側部に延出部２６を形成しているが、係止片２４ａ乃至２４ｉの各々の適宜の部位（例えば中央部或いは周方向に間隔をおいた複数個の部位）に１個或いは３個以上の延出部を形成することもでき、所望ならば係止片２４ａ乃至２４ｉの周方向幅と実質上同一の幅を有する１個の延出部を形成することもできる。また、図示の実施形態においては、係止片２４ａ乃至２４ｉの各々に延出部２６を形成しているが、所望ならば特定の複数個の係止片のみに或いは突出片３４が存在する角度領域に配置された係止片のみに延出部を形成することもできる。そしてまた、図示の実施形態においては、突出片３４が存在する角度領域に２個の係止片２４ａ及び２４ｉが存在するが、突出片３４が存在する角度領域に１個の係止片のみが存在する形態にして、かかる１個の係止片のみに延出部を形成することもできる。係止片が周方向に連続して延びる環状である場合も、突出片３４が存在する角度領域に１個又は複数個の延出部を形成し、突出片３４が存在する角度領域のみならずその他の角度領域にも渡って周方向に間隔をおいて複数個の延出部を形成し、或いは周方向に連続して延在する環状の延出部を形成することができる。更に、図示の実施形態においては、突出片３４は単一片から構成されているが、複数個の片から突出片を構成することもでき、また単一片の突出端（下端）から基端（上端）に向かって延びる１個又は複数個のスリットを形成して複数個の部分に分割することもできる。また、図示の実施形態においては、突出片３４の周方向両側に位置する２個の非破断接続片３８ａ及び３８ｂが配設されているが、１個或いは３個以上の非破断接続片を配設することもできる。 Although the preferred embodiment of the container lid constructed according to the present invention has been described in detail above with reference to the attached drawings, the present invention is not limited to such an embodiment, and it goes without saying that various modifications and alterations are possible without departing from the scope of the present invention. For example, in the illustrated embodiment, the extensions 26 are formed on both circumferential sides of each of the locking pieces 24a to 24i, but one or three or more extensions can be formed on appropriate portions of each of the locking pieces 24a to 24i (for example, the center portion or multiple portions spaced apart in the circumferential direction), and if desired, one extension having substantially the same width as the circumferential width of the locking pieces 24a to 24i can be formed. Also, in the illustrated embodiment, the extensions 26 are formed on each of the locking pieces 24a to 24i, but if desired, the extensions can be formed only on specific multiple locking pieces or only on locking pieces arranged in the angular region where the protruding piece 34 is present. In the illustrated embodiment, two locking pieces 24a and 24i are present in the angular region where the protruding piece 34 is present, but it is also possible to form only one locking piece in the angular region where the protruding piece 34 is present, and to form an extension part only on this one locking piece. Even if the locking piece is annular and extends continuously in the circumferential direction, one or more extension parts can be formed in the angular region where the protruding piece 34 is present, and multiple extension parts can be formed at intervals in the circumferential direction not only in the angular region where the protruding piece 34 is present but also over other angular regions, or an annular extension part that extends continuously in the circumferential direction can be formed. Furthermore, in the illustrated embodiment, the protruding piece 34 is composed of a single piece, but it can also be composed of multiple pieces, and it can also be divided into multiple parts by forming one or more slits extending from the protruding end (lower end) of a single piece to the base end (upper end). In addition, in the illustrated embodiment, two non-breakable connection pieces 38a and 38b are provided on both circumferential sides of the protruding piece 34, but one or three or more non-breakable connection pieces can also be provided.
２：容器蓋
４：本体
６：タンパーエビデント裾部
８：天面壁
１０：スカート壁
１８：雌螺条
２２：係止手段
２４ａ乃至ｉ：係止片
２６：延出部
３４：突出片
３５：***部
３８ａ：非破断接続片
３８ｂ：非破断接続片
４８：破断橋絡部
５０：口頸部
５２：雄螺条
５４：係止あご部
2: Container lid 4: Main body 6: Tamper evident bottom 8: Top wall 10: Skirt wall 18: Female thread 22: Locking means 24a to i: Locking pieces 26: Extension 34: Projecting piece 35: Raised portion 38a: Non-breakable connecting piece 38b: Non-breakable connecting piece 48: Breakable bridge portion 50: Neck portion 52: Male thread 54: Locking jaw portion
Claims (7)
少なくとも該突出片が存在する角度領域において、該係止片には該口頸部に合成樹脂製容器蓋を装着した状態において該口頸部の該係止あご部と該タンパーエビデント裾部との間に位置する延出部が形成されており、
該突出片の外面には***部が形成されており、
該口頸部に合成樹脂製容器蓋が装着され該口頸部が密封されている状態において、該口頸部を開封するために該本体が開方向に回転され、該破断橋絡部が破断されて該タンパーエビデント裾部から該本体が上方に移動され、該非破断接続片の所定部位を旋回中心として該本体が該タンパーエビデント裾部に対して所定角度を超えて旋回されると、該突出片の下部が該延出部を弾性的に乗り越えて、該突出片の該***部が該延出部の外面に当接せしめられる、
ことを特徴とする合成樹脂製容器蓋。 A synthetic resin container lid for use with a container having a male thread and a locking jaw located below the male thread formed on the outer peripheral surface of the mouth and neck, the lid including a main body having a top wall and a cylindrical skirt wall hanging down from the periphery of the top wall, the inner peripheral surface of the skirt wall having a female thread formed thereon to be screwed onto the male thread, and a cylindrical tamper evident skirt portion connected to the skirt wall of the main body via a plurality of break bridges arranged at intervals in the circumferential direction, the inner peripheral surface being provided with locking means for locking onto the locking jaw, the locking means being arranged at intervals in the circumferential direction. a plurality of locking pieces provided on a skirt wall of the main body and extending upward and radially inward from a base end connected to the tamper evident bottom portion, or a ring-shaped locking piece extending continuously in the circumferential direction and extending upward and radially inward from a base end connected to the tamper evident bottom portion, a protruding piece protruding downward is provided on the skirt wall of the main body, and a non-breakable connecting piece is further provided which connects the skirt wall of the main body and the tamper evident bottom portion and allows the main body to move upward relative to the tamper evident bottom portion,
At least in the angular region where the protruding piece exists, the locking piece is formed with an extension portion that is located between the locking jaw portion of the mouth and neck portion and the tamper evident bottom portion when the synthetic resin container lid is attached to the mouth and neck portion,
A protrusion is formed on the outer surface of the protruding piece,
When a synthetic resin container lid is attached to the mouth and neck portion and the mouth and neck portion is sealed, the main body is rotated in the opening direction to open the mouth and neck portion, the breakable bridge portion is broken, and the main body is moved upward from the tamper-evident bottom portion, and when the main body is rotated at a predetermined position of the unbreakable connection piece as a rotation center relative to the tamper-evident bottom portion by more than a predetermined angle, the lower part of the protruding piece elastically overcomes the extending portion, and the raised part of the protruding piece is brought into contact with the outer surface of the extending portion.
A synthetic resin container lid characterized by the above.
該***部の径方向への突出量は、該突条の径方向への突出量に対応する、請求項１乃至６のいずれかに記載の合成樹脂製容器蓋。 a lower end of an outer peripheral surface of the skirt wall and an upper end of an outer peripheral surface of the tamper-evident bottom portion are each formed with an arc-shaped protrusion extending continuously in a circumferential direction except for the specific region,
7. The synthetic resin container lid according to claim 1, wherein the amount of radial projection of said raised portion corresponds to the amount of radial projection of said ridge.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020000813A JP7466827B2 (en) | 2020-01-07 | 2020-01-07 | Plastic container lid |
| CN202180008250.8A CN114929589A (en) | 2020-01-07 | 2021-01-07 | Synthetic resin container lid |
| KR1020227024564A KR20220123008A (en) | 2020-01-07 | 2021-01-07 | Synthetic resin container lid |
| US17/790,201 US11952177B2 (en) | 2020-01-07 | 2021-01-07 | Synthetic resin container closure |
| MX2022008322A MX2022008322A (en) | 2020-01-07 | 2021-01-07 | Synthetic resin container lid. |
| EP21738834.7A EP4089028A4 (en) | 2020-01-07 | 2021-01-07 | Synthetic resin container lid |
| PCT/JP2021/000323 WO2021141079A1 (en) | 2020-01-07 | 2021-01-07 | Synthetic resin container lid |
| BR112022011612A BR112022011612A2 (en) | 2020-01-07 | 2021-01-07 | CLOSING OF SYNTHETIC RESIN CONTAINER |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020000813A JP7466827B2 (en) | 2020-01-07 | 2020-01-07 | Plastic container lid |
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| JP2021109660A JP2021109660A (en) | 2021-08-02 |
| JP7466827B2 true JP7466827B2 (en) | 2024-04-15 |
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| JP2020000813A Active JP7466827B2 (en) | 2020-01-07 | 2020-01-07 | Plastic container lid |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100032402A1 (en) | 2007-01-31 | 2010-02-11 | Obrist Closures Switzerland Gmbh | Tamper Evident Closure Cap, Container and Combination Thereof |
| US20180312305A1 (en) | 2015-10-22 | 2018-11-01 | Obrist Closures Switzerland Gmbh | Tamper-Evident Closures |
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2020
- 2020-01-07 JP JP2020000813A patent/JP7466827B2/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100032402A1 (en) | 2007-01-31 | 2010-02-11 | Obrist Closures Switzerland Gmbh | Tamper Evident Closure Cap, Container and Combination Thereof |
| US20180312305A1 (en) | 2015-10-22 | 2018-11-01 | Obrist Closures Switzerland Gmbh | Tamper-Evident Closures |
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| JP2021109660A (en) | 2021-08-02 |
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