JP4530445B2 - Synthetic resin container lid with pull ring - Google Patents

Synthetic resin container lid with pull ring Download PDF

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Publication number
JP4530445B2
JP4530445B2 JP13714799A JP13714799A JP4530445B2 JP 4530445 B2 JP4530445 B2 JP 4530445B2 JP 13714799 A JP13714799 A JP 13714799A JP 13714799 A JP13714799 A JP 13714799A JP 4530445 B2 JP4530445 B2 JP 4530445B2
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Japan
Prior art keywords
container lid
pull ring
wall
connecting column
crown cap
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JP13714799A
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Japanese (ja)
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JP2000327006A (en
Inventor
英彦 近江
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Nippon Closures Co Ltd
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Nippon Closures Co Ltd
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Priority to JP13714799A priority Critical patent/JP4530445B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、特に液体調味料の如き液体を収容した容器に適した合成樹脂製容器蓋、更に詳しくは、容器蓋本体とこの容器蓋本体に開閉動自在に連結された冠帽部とを備え、容器蓋本体に配設されているプルリングに指を掛けて引っ張ることによって容器蓋本体の底壁に規定されている切取領域が破断され、これによって排出開口が生成される形態の合成樹脂製容器蓋に関する。
【0002】
【従来の技術】
当業者には周知の如く、液体調味料の如き液体を収容した容器等のための容器蓋として、容器蓋本体と冠帽部とから構成された合成樹脂製容器蓋が広く実用に供されている。容器の口頸部に装着される容器蓋本体は、破断可能ラインによって切取領域が規定されている底壁と、底壁の切取領域から上方に延びる連結柱と、連結柱を介して切取領域に連結されたプルリングを含んでいる。冠帽体は、容器蓋本体に旋回自在に連結され或いは容器蓋本体とは別個に形成され、容器蓋本体の底壁、連結柱及びプルリングを覆う閉位置とこれらを露呈せしめる開位置とに選択的に位置せしめられる。冠帽体を開位置にせしめ、プルリングに指を掛けて引っ張ることによって破断ラインを破断せしめて切取領域を底壁から切り取ると、底壁に排出開口が生成され、かかる排出開口を通して容器内に収容されている内容物を排出することができる。
【0003】
【発明が解決しようとする課題】
上記形態の合成樹脂製容器蓋における容器蓋本体には、次のとおりの解決すべき問題がある。特に、容器の口頸部が比較的小径であり、従って容器蓋本体が比較的小径である場合、プルリングも必然的に小径になり、プルリングに指を掛けるのが必ずしも容易でない。かかる問題を解決せんとして、実公昭56−49899号公報及び実開昭53−129655号公報に開示されている合成樹脂製容器蓋においては、プルリングを連結柱から離れるに従って上方に向かって傾斜して延びる形態にせしめることを意図している。然るに、プルリングをかような形態に設計しても、容器蓋本体の成形工程において容器蓋本体を成形型から離脱せしめる際に、プルリングの存在に起因して連結柱近傍に生成される所謂無理抜きによって連結柱が上方に向かって内方に傾動せしめられ、従ってプルリングが連結柱から離れるに従って下方に傾動せしめられる傾向があり、それ故に連結柱から離れるに従って所要とおりに上方に向かって傾斜して延びる形態のプルリングを備えた容器蓋本体を高効率で形成することは不可能ではないにしても相当困難である。
【0004】
本発明は上記事実に鑑みてなされたものであり、その技術的課題は、成形された容器蓋を成形型から離脱せしめた時にはプルリングが連結柱から離れるに従って所要とおりに上方に向かって傾斜して延びる形態でなくても、冠帽部を閉位置に閉動せしめると、連結柱が上方に向かって外方に傾斜する方向に傾動せしめられ、これによってプルリングが連結柱から離れるに従って所要とおりに上方に向かって傾斜して延びる状態に傾動せしめられ、かくして充分容易にプルリングに指を掛けることができるようになる、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。
【0005】
【課題を解決するための手段】
本発明によれば、上記技術的課題を解決するために、冠帽部を閉位置に閉動せしめるとプルリングの内周面に係合して、連結柱が上方に向かって外方に傾斜し該プルリングが連結柱から離れる方向に従って上方に傾斜する状態に、連結柱及びプルリングを傾動せしめる傾動片を、冠帽部に配設する。そして、冠帽部が開位置にある状態で成形し、常温よりは高い温度まで冷却した後に成形型から離脱し、次いで常温まで冷却される前に冠帽部を閉位置に閉動せしめて常温まで冷却する。
【0006】
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、容器蓋本体と冠帽部とを備え、該容器蓋本体は破断可能ラインによって切取領域が規定されている底壁と、該底壁の該切取領域から上方に延びる連結柱と、該連結柱を介して該切取領域に連結されたプルリングとを含み、該冠帽体は該容器蓋本体の該底壁、該連結柱及び該プルリングを覆う閉位置と該容器蓋本体の該底壁、該連結柱及び該プルリングを露呈せしめる開位置との間を旋回自在に該容器蓋本体に連結されており、該冠帽部を該開位置に開動せしめ、該プルリングに指を掛けて引っ張ることによって該破断可能ラインが破断され、該切取領域が該底壁から切り取られて排出開口が生成される合成樹脂製容器蓋において、
該冠帽部には、該冠帽部が該閉位置に閉動せしめられると、該プルリングの内周面に係合して、該連結柱が上方に向かって外方に傾斜し該プルリングが連結柱から離れるに従って上方に傾斜する状態に、該連結柱及び該プルリングを傾動せしめる傾動片が配設されており、
該冠帽部が該開位置にある状態で成形され、常温よりは高い温度まで冷却された後に成形型から離脱され、次いで常温まで冷却される前に該冠帽部が該閉位置に閉動せしめられて常温まで冷却せしめられる、
ことを特徴とする合成樹脂製容器蓋が提供される。
【0007】
好適実施形態においては、該容器蓋本体の該底壁の上面には該破断可能ラインよりも半径方向外側において上方に延びる注出案内壁が形成されており、該冠帽部は天面壁を含み、該天面壁の内面には下方に延出するシール壁が形成されており、該冠帽部が該閉位置にせしめられると該シール壁の外周面が該注出案内壁の内周面上部に密接せしめられ、傾動片は該シール壁よりも半径方向内側において該天面壁の内面から垂下せしめられている。また、該冠帽部が該閉位置に閉動せしめられると、該傾動片は該プルリングにおける該連結柱が連結されている部分の内周面に係合する。
【0008】
【発明の実施の形態】
以下、本発明に従う合成樹脂製容器蓋の好適実施形態を図示している添付図面を参照して、更に詳細に説明する。
【0009】
図1及び図2を参照して説明すると、全体を番号2で示す容器蓋は、その全体がポリプロピレン又はポリエチレンの如き適宜の合成樹脂から一体に形成されており、容器蓋本体4とこの容器蓋本体4に連結されている冠帽部6とから構成されている。
【0010】
容器蓋本体4は略円板形状でよい底壁8を有する。この底壁8の下面には外側垂下壁10及び内側垂下壁12が形成されている。外側垂下壁10は略円筒形状であり、底壁8の外周縁から下方に垂下せしめられている。内側垂下壁12も略円筒形状であり、外側垂下壁10と同心状に底壁6の下面から下方に垂下せしめられている。外側垂下壁10の内周面には半径方向内方に突出した環状係止突条14が形成されている。内側垂下壁12の外周面下部には下方に向かって外径が漸次低減せしめられている逆円錐台形状部16が形成されており、逆円錐台形状部16よりも下方に位置する下端部の外径は逆円錐台形状部16よりも上方に位置する主部の外径よりも小さくせしめられている。
【0011】
底壁8の上面には環状係止壁18が形成されている。この係止壁18は底壁8の上面における外周縁部から上方に延びる略円筒形状であり、その外周面上端には半径方向外方に突出した環状係止突条20が形成されている。底壁8の上面には注出案内壁22も形成されている。注出案内壁22は底壁8の上面から上方に延びる略円筒形状であり、その上端部は半径方向外方に湾曲せしめられている。図示の実施形態においては、注出案内壁22は係止壁18と同心状ではなく、係止壁18に対して図1及び図2において若干左方に変位せしめられている。係止壁8は比較的低く、注出案内壁22は比較的高く、注出案内壁22は係止壁8を越えて上方に延出せしめられている。
【0012】
底壁8には、更に、上記内側垂下壁12及び注出案内壁22よりも半径方向内側を円形状に延びる破断可能ライン24が形成されており、かかる破断可能ライン24によって円形切取領域26が規定されている。破断可能ライン24は、肉厚を低減せしめた所謂スコアから構成することができる。切取領域26の中央部28、従って底壁8の中央部28は略半球状に下方に没入せしめられている。切取領域26には、その周縁部特定角度位置から上方に実質上鉛直に延びる連結柱30が形成されている。そして、この連結柱30には略円環状に延びるプルリング32が付設されている。換言すれば、底壁8の切取領域26には連結柱30を介してプルリング32が連結されている。図示の実施形態においては、プルリング32は連結柱30から実質上水平に延びており、注出案内壁22と実質上同心状に配置されている。プルリング32の先半部(即ち図2において左半部)の内周面にはそこに掛けられる指の滑りを防止するための弧状突条34が軸線方向に間隔をおいて3個形成されている。
【0013】
図1及び図2を参照して説明を続けると、冠帽部6は円形天面壁38とこの天面壁38の周縁から垂下する(即ち冠帽部6が図3に示す閉位置に位置せしめられている時に天面壁38の周縁から下方に延びる)円筒形状のスカート壁40とを有する。冠帽部6には、更に、天面壁38の内面から下方に延出する円筒形状のシール壁42も形成されている。図示の実施形態においては、シール壁42はスカート壁40と同心状ではなく、図1及び図2においてスカート壁40に対して若干右方に変位せしめられている(冠帽部6が図3に示す閉位置にせしめられると、スカート壁40が容器蓋本体の係止壁18と同心状に位置し、シール壁42が容器蓋本体4の注出案内壁22と同心状に位置する)。シール壁42の外周面は延出端に向かって外径が漸次減少する逆円錐台形状にせしめられている。スカート壁40の下端部においては内径が幾分拡大せしめられており、かかる下端部の内周面には半径方向内方に突出する環状係止突条44が形成されている。かような冠帽部6は、それ自体は周知の形態でよい旋回連結部46を介して容器蓋本体4に連結されている。図示の旋回連結部46は容器蓋本体4の底壁6の外周面と冠帽体6のスカート壁40の外周面下端との間に配置されている。冠帽部6には、旋回連結部46の直径方向反対側においてスカート壁40の外周面下端から半径方向外方に突出する突出片48も形成されている。
【0014】
本発明に従って構成された容器蓋2においては、冠帽部6に傾動片49が配設されていることが重要である。図示の実施形態においては、傾動片49は上記シール壁42よりも半径方向内側において天面壁38の内面から垂下している(即ち冠帽部6が図3に示す閉位置に位置せしめられている時に天面壁38の内面から下方に延びている)。かかる傾動片49は、冠帽部6が図3に示す閉位置に位置せしめられている時に容器蓋本体4のおける上記連結柱30に整合する角度位置に配置されているのが好都合である。傾動片49の横断面形状は弧状でよい。傾動片49の外径は上記プルリング32の内径よりも幾分大きく、後に更に言及する如く、冠帽部6が図3に示す閉位置に閉動せしめられた時に、傾動片49がプルリング32の内周面に干渉する。傾動片49の外周面下部は延出端に向かって漸次小径にせしめられているのが好都合である。
【0015】
上述したとおりの容器蓋2は、図1及び図2に図示する状態、即ち冠帽部6が開位置に位置せしめられている状態で、射出或いは圧縮成形され、常温よりは幾分高い所要温度(例えば40乃至50℃)まで冷却された後に成形型から離脱せしめられる。次いで、成形型から離脱せしめられた容器蓋2が常温まで冷却される前に、冠帽部6が閉動せしめられて図3に図示する閉位置に位置せしめられる。かくすると、図3に明確に図示する如く、冠帽部6に配設されている傾動片49がプルリング32に干渉して、連結柱30が上方に向かって外方(図3において右方)に傾斜する方向に連結柱30及びプルリング32を傾動せしめ、プルリング32は連結柱30から離れるに従って上方に傾斜する状態にせしめられる。そして、かかる状態において容器蓋2が常温まで冷却され、しかる後においては冠帽部6を図1及び図2に図示する開位置に開動せしめても、連結柱30及びプルリング32は図3に図示する状態或いはこの状態から弾性的に図2に図示する状態に向けて幾分かだけ戻った状態(図2に二点鎖線で示す状態)に維持される。
【0016】
図2及び図3には、容器蓋2が適用される容器の口頸部50も図示されている。ガラス或いはポリエチレンテレフタレートの如き適宜の合成樹脂から形成することができる容器の口頸部50は略円筒形状であり、その外周面上端部には半径方向外方に突出する環状係止あご部52が形成されている。容器蓋本体4は、容器の口頸部50の上端部を外側垂下壁10と内側垂下壁12との間に受け入れて、口頸部50に装着される。外側垂下壁10の内周面に形成されている係止突条14が口頸部50の係止あご部52の下方に係止され、これによって口頸部50に容器蓋本体4が係止される。内側垂下壁12の外周面が口頸部50の内周面に密接せしめられると共に、外側垂下壁10と内側垂下壁12との間にて底壁8の下面が口頸部50の上端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。冠帽体6は、通常、図3に示す閉位置に位置せしめられている。冠帽体6が閉位置に位置せしめられると、スカート壁40の内周面に形成されている係止突条44が容器蓋本体4の係止壁18の外周面に形成されている係止突条20の下方に係止せしめられ、これによって冠帽体6が閉位置に係止せしめられる。冠帽体6のシール壁42の外周面は容器蓋本体4の注出案内壁22の内周面上部に密接せしめられる。
【0017】
容器内に収容されている液体を排出する際には、冠帽部6を図3に示す閉位置から図2に示す開位置に旋回せしめる。次いで、プルリング32に指を掛けて上方に引っ張る。上述した如くプルリング32は傾動片49の作用によって図2に二点鎖線で例示する如く連結片30から離れるに従って上方に向かって傾斜する状態に傾動せしめられている故に、プルリング32が比較的小径である場合にも充分容易にプルリング32に指を掛けて上方に引っ張ることができる。プルリング32を上方に引っ張ると底壁8に形成されている破断可能ライン24が破断され、プルリング32及び連結柱30と共に底壁8の切取領域26が容器蓋本体4から分離され、底壁8に排出開口が生成される。しかる後においては、容器全体を傾動せしめることによって、排出開口を通して容器内の液体を注出することができる。排出開口を通して注出される液体は、容器蓋本体4の注出案内壁22に案内されて円滑に注出される。所要量の液体の注出が終了すると、冠帽部6を図3に示す閉位置に旋回せしめる。かくすると、冠帽部6のシール壁42の外周面が容器蓋本体4の注出案内壁22の内周面上部に密接せしめられ、これによって容器の口頸部50が一次的に密封される。
【0018】
【発明の効果】
本発明の合成樹脂製容器蓋においては、容器蓋成形の後に傾動片の作用によってプルリングが連結柱から離れるに従って上方に向かって傾斜して延びる形態にせしめられ、それ故にプルリングが比較的小さい場合でも充分容易にプルリングに指を掛けて上方に引っ張り、破断可能ラインを破断せしめることができる。
【図面の簡単な説明】
【図1】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、冠帽部を開状態に位置せしめてた形態で成形した状態を示す平面図。
【図2】図1の線A−Aにおける断面図。
【図3】図1に示す容器蓋を、成形の後に冠帽部を閉位置に閉動した状態で示す断面図。
【符号の説明】
2:合成樹脂製容器蓋
4:容器蓋本体
6:冠帽部
8:底壁
24:破断可能ライン
26:切取領域
30:連結柱
32:プルリング
38:天面壁
49:傾動片
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin container lid particularly suitable for a container containing a liquid such as a liquid seasoning. More specifically, the present invention includes a container lid main body and a crown cap portion connected to the container lid main body so as to be opened and closed. A synthetic resin container in which the cut region defined in the bottom wall of the container lid body is broken by pulling the pull ring disposed in the container lid body with a finger and pulled, thereby generating a discharge opening Regarding the lid.
[0002]
[Prior art]
As is well known to those skilled in the art, a synthetic resin container lid composed of a container lid body and a crown cap portion is widely used as a container lid for containers containing liquids such as liquid seasonings. Yes. The container lid body attached to the mouth / neck portion of the container has a bottom wall in which a cutout area is defined by a breakable line, a connection column extending upward from the cutout area of the bottom wall, and a cutout area via the connection post. Includes linked pull rings. The crown cap body is pivotally connected to the container lid body or formed separately from the container lid body, and is selected as a closed position that covers the bottom wall of the container lid body, the connecting column, and the pull ring, and an open position that exposes them. Positioned. When the crown cap body is in the open position, the pulling ring is pulled and the pulling line is broken to break the breaking line and the cut area is cut from the bottom wall, a discharge opening is created in the bottom wall, and the container is accommodated through the discharge opening. The contents can be discharged.
[0003]
[Problems to be solved by the invention]
The container lid main body in the synthetic resin container lid of the said form has the problem which should be solved as follows. In particular, when the mouth and neck of the container has a relatively small diameter, and therefore the container lid body has a relatively small diameter, the pull ring inevitably has a small diameter, and it is not always easy to put a finger on the pull ring. As a solution to this problem, in the synthetic resin container lids disclosed in Japanese Utility Model Publication Nos. 56-49899 and 53-129655, the pull ring is inclined upward as it moves away from the connecting column. It is intended to be extended. However, even if the pull ring is designed in such a form, when the container lid main body is removed from the mold in the container lid main body forming process, the pull ring is generated in the vicinity of the connecting column due to the presence of the pull ring. Will cause the connecting column to tilt inwardly upward and therefore tend to be tilted down as the pull ring moves away from the connecting column, and therefore extends upwardly as required as it moves away from the connecting column. It is quite difficult if not impossible to form a container lid body with a shaped pull ring with high efficiency.
[0004]
The present invention has been made in view of the above-mentioned facts, and its technical problem is that when the molded container lid is detached from the mold, the pull ring is inclined upward as required as it moves away from the connecting column. Even if the crown is not extended, when the cap is closed to the closed position, the connecting column is tilted outwardly, so that the pull ring moves upward as required as the pull ring moves away from the connecting column. It is a novel and improved synthetic resin container lid that is tilted into an extended state towards the surface and thus allows a finger to be pulled onto the pull ring with sufficient ease.
[0005]
[Means for Solving the Problems]
According to the present invention, in order to solve the above technical problem, when the cap portion is moved to the closed position, it engages with the inner peripheral surface of the pull ring, and the connecting column is inclined outward. A tilting piece for tilting the connecting column and the pull ring is disposed on the crown cap so that the pull ring is tilted upward in a direction away from the connecting column. Then, the cap is molded in the open position, cooled to a temperature higher than room temperature, then removed from the mold, and then the crown cap is moved to the closed position before being cooled to room temperature. Allow to cool.
[0006]
That is, according to the present invention, the synthetic resin container lid that achieves the above technical problem includes a container lid main body and a crown cap portion, and the container lid main body has a bottom in which a cutting area is defined by a breakable line. A wall, a connecting column extending upward from the cut region of the bottom wall, and a pull ring connected to the cut region via the connecting column, wherein the cap is the bottom wall of the container lid body, The crown is connected to the container lid body so as to be pivotable between a closed position that covers the coupling pillar and the pull ring and an open position that exposes the bottom wall of the container lid body, the coupling pillar and the pull ring, A synthetic resin container lid in which the cap portion is moved to the open position, and the breakable line is broken by pulling the pull ring with a finger, and the cut region is cut from the bottom wall to generate a discharge opening. In
When the crown cap portion is closed to the closed position, the crown cap portion engages with the inner peripheral surface of the pull ring, and the connecting column is inclined outwardly to form the pull ring. A tilting piece for tilting the connecting column and the pull ring is disposed in a state of tilting upward as the distance from the connecting column increases .
Molded with the cap in the open position, cooled to a temperature higher than room temperature, then removed from the mold, and then closed to the closed position before being cooled to room temperature. Chilled to room temperature,
A synthetic resin container lid is provided.
[0007]
In a preferred embodiment, an upper surface of the bottom wall of the container lid body is formed with a pouring guide wall extending radially outward from the breakable line, and the cap includes a top wall. A seal wall extending downward is formed on the inner surface of the top wall, and when the crown cap portion is brought into the closed position, the outer peripheral surface of the seal wall is the upper part of the inner peripheral surface of the dispensing guide wall. The tilting piece is suspended from the inner surface of the top wall on the radially inner side of the seal wall . Further, when the crown cap portion is closed to the closed position, the tilting piece engages with an inner peripheral surface of a portion of the pull ring to which the connecting column is connected.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of a synthetic resin container lid according to the present invention will be described in more detail with reference to the accompanying drawings.
[0009]
Referring to FIGS. 1 and 2, the entire container lid denoted by reference numeral 2 is integrally formed of a suitable synthetic resin such as polypropylene or polyethylene, and the container lid body 4 and the container lid. The cap 6 is connected to the main body 4.
[0010]
The container lid body 4 has a bottom wall 8 which may be substantially disk-shaped. An outer hanging wall 10 and an inner hanging wall 12 are formed on the lower surface of the bottom wall 8. The outer hanging wall 10 has a substantially cylindrical shape and is suspended downward from the outer peripheral edge of the bottom wall 8. The inner hanging wall 12 is also substantially cylindrical, and is suspended downward from the lower surface of the bottom wall 6 concentrically with the outer hanging wall 10. An annular locking ridge 14 is formed on the inner peripheral surface of the outer hanging wall 10 so as to protrude radially inward. An inverted frustoconical portion 16 whose outer diameter is gradually reduced downward is formed at the lower part of the outer peripheral surface of the inner hanging wall 12, and a lower end portion located below the inverted frustoconical portion 16 is formed. The outer diameter is made smaller than the outer diameter of the main part located above the inverted truncated cone shape part 16.
[0011]
An annular locking wall 18 is formed on the upper surface of the bottom wall 8. The locking wall 18 has a substantially cylindrical shape extending upward from the outer peripheral edge on the upper surface of the bottom wall 8, and an annular locking ridge 20 protruding radially outward is formed at the upper end of the outer peripheral surface. A pouring guide wall 22 is also formed on the upper surface of the bottom wall 8. The extraction guide wall 22 has a substantially cylindrical shape extending upward from the upper surface of the bottom wall 8, and its upper end is curved outward in the radial direction. In the illustrated embodiment, the dispensing guide wall 22 is not concentric with the locking wall 18 and is displaced slightly to the left in FIGS. 1 and 2 with respect to the locking wall 18. The locking wall 8 is relatively low, the dispensing guide wall 22 is relatively high, and the dispensing guide wall 22 extends upward beyond the locking wall 8.
[0012]
The bottom wall 8 is further formed with a breakable line 24 that extends in a circular shape radially inward from the inner hanging wall 12 and the extraction guide wall 22, and a circular cutout region 26 is formed by the breakable line 24. It is prescribed. The breakable line 24 can be composed of a so-called score with a reduced thickness. The central portion 28 of the cut-out region 26, and hence the central portion 28 of the bottom wall 8, is immersed downward in a substantially hemispherical shape. In the cut region 26, a connecting column 30 is formed that extends substantially vertically upward from the peripheral edge specific angle position. A pull ring 32 extending in a substantially annular shape is attached to the connecting column 30. In other words, the pull ring 32 is connected to the cutout region 26 of the bottom wall 8 via the connecting pillar 30. In the illustrated embodiment, the pull ring 32 extends substantially horizontally from the connecting column 30 and is arranged substantially concentrically with the dispensing guide wall 22. Three arc-shaped ridges 34 are formed on the inner peripheral surface of the front half of the pull ring 32 (that is, the left half in FIG. 2) at intervals in the axial direction to prevent slipping of fingers. Yes.
[0013]
1 and 2, the crown cap portion 6 is suspended from the circular top wall 38 and the periphery of the top wall 38 (that is, the crown cap portion 6 is positioned at the closed position shown in FIG. 3). And a cylindrical skirt wall 40 extending downward from the periphery of the top wall 38. The crown cap portion 6 is further formed with a cylindrical seal wall 42 extending downward from the inner surface of the top wall 38. In the illustrated embodiment, the seal wall 42 is not concentric with the skirt wall 40 and is displaced slightly to the right with respect to the skirt wall 40 in FIGS. 1 and 2 (the cap 6 is shown in FIG. 3). In the closed position shown, the skirt wall 40 is positioned concentrically with the locking wall 18 of the container lid body, and the seal wall 42 is positioned concentrically with the dispensing guide wall 22 of the container lid body 4). The outer peripheral surface of the seal wall 42 is formed in an inverted truncated cone shape whose outer diameter gradually decreases toward the extending end. An inner diameter is somewhat enlarged at the lower end of the skirt wall 40, and an annular locking ridge 44 protruding radially inward is formed on the inner peripheral surface of the lower end. Such a cap 6 is connected to the container lid body 4 via a pivot connection 46 which may be in a known form. The swivel connecting portion 46 shown in the figure is disposed between the outer peripheral surface of the bottom wall 6 of the container lid body 4 and the lower end of the outer peripheral surface of the skirt wall 40 of the cap 6. The crown cap portion 6 is also formed with a protruding piece 48 that protrudes radially outward from the lower end of the outer peripheral surface of the skirt wall 40 on the diametrically opposite side of the swivel connecting portion 46.
[0014]
In the container lid 2 configured according to the present invention, it is important that the tilting piece 49 is disposed in the crown cap portion 6. In the illustrated embodiment, the tilting piece 49 is suspended from the inner surface of the top wall 38 radially inward of the seal wall 42 (that is, the cap 6 is positioned at the closed position shown in FIG. 3). Sometimes extending downward from the inner surface of the top wall 38). Such a tilting piece 49 is advantageously arranged at an angular position that aligns with the connecting column 30 in the container lid body 4 when the crown cap 6 is positioned in the closed position shown in FIG. The cross-sectional shape of the tilting piece 49 may be an arc shape. The outer diameter of the tilting piece 49 is somewhat larger than the inner diameter of the pull ring 32, and as will be further described later, when the crown cap portion 6 is closed to the closed position shown in FIG. Interferes with the inner surface. It is convenient that the lower part of the outer peripheral surface of the tilting piece 49 is gradually reduced in diameter toward the extending end.
[0015]
The container lid 2 as described above is injected or compression-molded in the state shown in FIGS. 1 and 2, that is, in the state where the cap 6 is positioned in the open position, and the required temperature somewhat higher than room temperature. After being cooled to (for example, 40 to 50 ° C.), it is released from the mold. Then, before the container closure 2 which is allowed to leave from the forming shape types are cooled to room temperature, Kanmuribo portion 6 is brought into the closed position illustrated in FIG. 3 is caused to closing. In this way, as clearly shown in FIG. 3, the tilting piece 49 disposed in the crown cap portion 6 interferes with the pull ring 32, and the connecting column 30 is outwardly outward (rightward in FIG. 3). The connecting column 30 and the pull ring 32 are tilted in the direction in which the connecting column 30 is inclined, and the pull ring 32 is inclined upward as the distance from the connecting column 30 increases. In such a state, the container lid 2 is cooled to room temperature. After that, even if the crown 6 is moved to the open position shown in FIGS. 1 and 2, the connecting column 30 and the pull ring 32 are shown in FIG. 2 or a state that is elastically returned from this state toward the state shown in FIG. 2 (state indicated by a two-dot chain line in FIG. 2).
[0016]
2 and 3 also show the mouth and neck portion 50 of the container to which the container lid 2 is applied. The mouth-and-neck portion 50 of the container that can be formed from an appropriate synthetic resin such as glass or polyethylene terephthalate has a substantially cylindrical shape, and an annular locking jaw portion 52 that protrudes radially outward is formed at the upper end portion of the outer peripheral surface. Is formed. The container lid main body 4 is attached to the mouth / neck part 50 by receiving the upper end of the mouth / neck part 50 of the container between the outer hanging wall 10 and the inner hanging wall 12. The locking protrusion 14 formed on the inner peripheral surface of the outer hanging wall 10 is locked below the locking jaw portion 52 of the mouth-and-neck portion 50, whereby the container lid body 4 is locked to the mouth-and-neck portion 50. Is done. The outer peripheral surface of the inner hanging wall 12 is brought into intimate contact with the inner peripheral surface of the mouth-and-neck portion 50, and the lower surface of the bottom wall 8 is located between the outer hanging wall 10 and the inner hanging wall 12 at the upper end surface of the mouth-and-neck portion 50. The mouth and neck 50 is sealed by being brought into close contact. The cap 6 is normally located at the closed position shown in FIG. When the crown cap body 6 is positioned at the closed position, the locking protrusion 44 formed on the inner peripheral surface of the skirt wall 40 is formed on the outer peripheral surface of the locking wall 18 of the container lid body 4. The crown cap body 6 is locked in the closed position by being locked below the ridge 20. The outer peripheral surface of the seal wall 42 of the crown cap body 6 is brought into close contact with the upper portion of the inner peripheral surface of the dispensing guide wall 22 of the container lid body 4.
[0017]
When discharging the liquid stored in the container, the cap 6 is swung from the closed position shown in FIG. 3 to the open position shown in FIG. Next, the pull ring 32 is put on a finger and pulled upward. As described above, the pull ring 32 has a relatively small diameter because the pull ring 32 is tilted upward as it moves away from the connecting piece 30 as illustrated by a two-dot chain line in FIG. In some cases, the pull ring 32 can be easily pulled and pulled upward. When the pull ring 32 is pulled upward, the breakable line 24 formed in the bottom wall 8 is broken, and the cut region 26 of the bottom wall 8 together with the pull ring 32 and the connecting post 30 is separated from the container lid body 4, and A discharge opening is created. Thereafter, the liquid in the container can be poured out through the discharge opening by tilting the entire container. The liquid poured out through the discharge opening is guided and smoothly poured out by the pouring guide wall 22 of the container lid body 4. When the dispensing of the required amount of liquid is completed, the cap 6 is turned to the closed position shown in FIG. As a result, the outer peripheral surface of the sealing wall 42 of the crown cap 6 is brought into close contact with the upper part of the inner peripheral surface of the dispensing guide wall 22 of the container lid body 4, thereby primarily sealing the mouth / neck portion 50 of the container. .
[0018]
【The invention's effect】
In the case of the synthetic resin container lid according to the present invention, after the container lid is formed, the pull ring is inclined and extended upward as it moves away from the connecting column by the action of the tilting piece, and therefore even when the pull ring is relatively small. The pullable ring can be broken sufficiently easily by placing a finger on the pull ring and pulling it upward.
[Brief description of the drawings]
FIG. 1 is a plan view showing a state in which a preferred embodiment of a synthetic resin container lid constructed according to the present invention is molded in a form in which a crown cap portion is positioned in an open state.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a cross-sectional view showing the container lid shown in FIG. 1 in a state in which the crown cap portion is moved to a closed position after molding.
[Explanation of symbols]
2: Synthetic resin container lid 4: Container lid body 6: Crown cap portion 8: Bottom wall 24: Breakable line 26: Cut-off area 30: Connecting column 32: Pull ring 38: Top wall 49: Tilt piece

Claims (3)

容器蓋本体と冠帽部とを備え、該容器蓋本体は破断可能ラインによって切取領域が規定されている底壁と、該底壁の該切取領域から上方に延びる連結柱と、該連結柱を介して該切取領域に連結されたプルリングとを含み、該冠帽は該容器蓋本体の該底壁、該連結柱及び該プルリングを覆う閉位置と該容器蓋本体の該底壁、該連結柱及び該プルリングを露呈せしめる開位置との間を旋回自在に該容器蓋本体に連結されており、該冠帽部を該開位置に開動せしめ、該プルリングに指を掛けて引っ張ることによって該破断可能ラインが破断され、該切取領域が該底壁から切り取られて排出開口が生成される合成樹脂製容器蓋において、
該冠帽部には、該冠帽部が該閉位置に閉動せしめられると、該プルリングの内周面に係合して、該連結柱が上方に向かって外方に傾斜し該プルリングが連結柱から離れるに従って上方に傾斜する状態に、該連結柱及び該プルリングを傾動せしめる傾動片が配設されており、
該冠帽部が該開位置にある状態で成形され、常温よりは高い温度まで冷却された後に成形型から離脱され、次いで常温まで冷却される前に該冠帽部が該閉位置に閉動せしめられて常温まで冷却せしめられる、
ことを特徴とする合成樹脂製容器蓋。
A container lid main body and a crown cap, the container lid main body having a bottom wall with a cutout area defined by a breakable line, a connecting column extending upward from the cutout area of the bottom wall, and the connecting column through and a pull ring coupled to該切preparative area, the crown cap portion bottom wall of the container closure body, said connecting post and closed position and the container closure body of the bottom wall covering the pull ring, the connecting It is connected to the container lid main body so as to be pivotable between a column and an open position that exposes the pull ring. In a synthetic resin container lid in which the possible line is broken and the cutout area is cut off from the bottom wall to create a discharge opening,
When the crown cap portion is moved to the closed position, the crown cap portion engages with the inner peripheral surface of the pull ring, and the connecting column is inclined outwardly to form the pull ring. A tilting piece for tilting the connecting column and the pull ring is disposed so as to tilt upward as the distance from the connecting column increases .
Molded with the crown cap in the open position, cooled to a temperature higher than room temperature, then removed from the mold, and then closed to the closed position before being cooled to room temperature. Chilled to room temperature,
A synthetic resin container lid.
該容器蓋本体の該底壁の上面には該破断可能ラインよりも半径方向外側において上方に延びる注出案内壁が形成されており、該冠帽部は天面壁を含み、該天面壁の内面には下方に延出するシール壁が形成されており、該冠帽部が該閉位置にせしめられると該シール壁の外周面が該注出案内壁の内周面上部に密接せしめられ、傾動片は該シール壁よりも半径方向内側において該天面壁の内面から垂下せしめられている、請求項1記載の合成樹脂製容器蓋。 On the upper surface of the bottom wall of the container lid main body, a pouring guide wall extending upward radially outward from the breakable line is formed, the cap includes a top wall, and the inner surface of the top wall A seal wall extending downward is formed, and when the crown cap portion is brought into the closed position, the outer peripheral surface of the seal wall is brought into close contact with the upper part of the inner peripheral surface of the dispensing guide wall, and tilting is performed. 2. The synthetic resin container lid according to claim 1, wherein the piece is suspended from the inner surface of the top wall on the radially inner side of the seal wall . 該冠帽部が該閉位置に閉動せしめられると、該傾動片は該プルリングにおける該連結柱が連結されている部分の内周面に係合する、請求項1又は2記載の合成樹脂製容器蓋。  3. The synthetic resin product according to claim 1, wherein when the crown cap portion is moved to the closed position, the tilting piece engages with an inner peripheral surface of a portion of the pull ring to which the connecting column is connected. Container lid.
JP13714799A 1999-05-18 1999-05-18 Synthetic resin container lid with pull ring Expired - Fee Related JP4530445B2 (en)

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JP4885386B2 (en) * 2001-08-31 2012-02-29 日本クラウンコルク株式会社 Plastic container lid
JP4560349B2 (en) * 2004-08-06 2010-10-13 日本クラウンコルク株式会社 Plastic cap with excellent liquid splash prevention
JP5323322B2 (en) * 2007-02-27 2013-10-23 株式会社吉野工業所 cap

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