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JP5298349B2 - Lid installation method - Google Patents

Lid installation method Download PDF

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JP5298349B2
JP5298349B2 JP2009138013A JP2009138013A JP5298349B2 JP 5298349 B2 JP5298349 B2 JP 5298349B2 JP 2009138013 A JP2009138013 A JP 2009138013A JP 2009138013 A JP2009138013 A JP 2009138013A JP 5298349 B2 JP5298349 B2 JP 5298349B2
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lid
mouth
extending
neck
flange
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JP2010285161A (en
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恭典 山崎
秀充 宮林
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Nippon Closures Co Ltd
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Nippon Closures Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To avoid inhibiting the movement of a connection base to extending ends by bringing the extending ends (44) of respective extending pieces (34) of a lid flange into contact with the connection base (36) when the lid is rotated in the opening direction to open an opening neck by improving a method for mounting the lid (4) forming the lid flange (32) on the outer peripheral face of a skirt wall (18) on the opening neck of a container body forming an opening neck flange (10) on the outer peripheral face of the opening neck (2). <P>SOLUTION: When the extending ends of respective extending pieces of the lid flange are locked on respective locking means of the opening neck flange, the extending ends are displaced downward with respect to the connection base. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

本発明は、合成樹脂から形成されスカート壁の外周面には蓋フランジが形成されている蓋を、口頸部の外周面には口頸部フランジが形成されている容器本体に装着する蓋装着方法に関する。   The present invention relates to a lid mounting for mounting a lid formed of a synthetic resin and having a lid flange formed on the outer peripheral surface of the skirt wall, and a container body having a mouth and neck flange formed on the outer peripheral surface of the mouth and neck portion. Regarding the method.

飲料用容器として、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容器本体と合成樹脂から形成された蓋との組合から構成された容器が広く実用に供されている。容器は円筒形状の口頸部を有し、この口頸部の外周面には雄螺条が形成されている。蓋は天面壁及びこの天面壁の周縁から垂下する円筒形状のスカート壁を有し、スカート壁の内周面には雌螺条が形成されている。容器の口頸部に蓋を被嵌し蓋を閉方向に回転せしめて口頸部の雄螺条に蓋の雌螺条を螺合せしめることによって、口頸部に容器蓋が装着され口頸部が密封される。口頸部を開封する際には、蓋を開方向に回転せしめて口頸部の雄螺条に対する蓋の雌螺条の螺合を解除して口頸部から蓋を離脱せしめる。   As a beverage container, a container composed of a combination of an appropriate synthetic resin such as polyethylene terephthalate, a container body formed of glass or a metal thin plate, and a lid formed of a synthetic resin is widely used in practical use. The container has a cylindrical mouth and neck portion, and a male thread is formed on the outer peripheral surface of the mouth and neck portion. The lid has a top wall and a cylindrical skirt wall depending from the periphery of the top wall, and a female thread is formed on the inner peripheral surface of the skirt wall. The container lid is attached to the mouth and neck by fitting the lid on the mouth and neck of the container, rotating the lid in the closing direction, and screwing the female thread of the lid onto the male thread of the mouth and neck. The part is sealed. When opening the mouth and neck, the lid is rotated in the opening direction to release the screw of the female thread of the lid with respect to the male thread of the mouth and neck, and the lid is detached from the mouth and neck.

而して、上述した形態の容器は、悪戯によって蓋が開方向に回転せしめられ口頸部の密封が解除されてしまった場合には、かかる事実が明示される所謂タンパーエビデント特性を備えていることが重要である。容器にタンパーエビデント特性を付与せしめるための典型的技法においては、容器本体の口頸部の外周面に雄螺条の下方に位置する係止あご部を形成すると共に、蓋のスカート壁に周方向に延在する破断可能ラインを形成してスカート壁をこの破断可能ラインよりも上方の主部と下方のタンパーエビデント裾部とに区画し、タンパーエビデント裾部の内周面に上記係止あご部と協働する係止手段を形成する。容器本体の口頸部に蓋を所要とおりに装着すると、蓋の係止手段が口頸部の係止あご部に係止せしめられる。蓋を開方向に回転せしめると、口頸部の雄螺条に沿って蓋の雌螺条が移動せしめられることによって蓋は回転と共に上昇せしめられる。しかしながら、タンパーエビデント裾部はその内周面に形成されている係止手段が口頸部の係止あご部に係止せしめられている故に上昇が阻止され、これによって上記破断可能ラインに応力が生成されて破断可能ラインが破断され、かくして蓋が開方向に回転せしめられたことが明示される。   Thus, the container of the above-described form has a so-called tamper-evidence characteristic in which such a fact is clearly shown when the lid is rotated in the open direction by mischief and the sealing of the mouth and neck is released. It is important that In a typical technique for imparting tamper-evidence characteristics to a container, a locking jaw is formed on the outer peripheral surface of the mouth and neck of the container body, which is positioned below the male thread, and is formed around the skirt wall of the lid. Forming a breakable line extending in the direction, and dividing the skirt wall into a main portion above the breakable line and a tamper evidence hem below the skirt wall, and the above-mentioned engagement on the inner peripheral surface of the tamper evidence skirt. A locking means for cooperating with the stop jaw is formed. When the lid is attached to the mouth / neck portion of the container body as required, the lid locking means is locked to the locking jaw portion of the mouth / neck portion. When the lid is rotated in the opening direction, the lid is raised along with the rotation by moving the female thread of the lid along the male thread of the mouth and neck. However, the tamper-evident hem is prevented from rising because the locking means formed on the inner peripheral surface of the tamper-evident is locked to the locking jaw of the mouth-neck, thereby causing stress to the breakable line. Is generated to break the breakable line, thus indicating that the lid has been rotated in the opening direction.

然るに、上記典型的技法によるタンパーエビデント特性の賦与においては、特に蓋のスカート壁の下部にタンパーエビデント裾部を配設しその内周面に係止手段を形成することが必要であることに起因して、蓋を製造するための必要合成樹脂量が比較的大きく、製造コストを充分に低減せしめることが困難であり、そしてまた蓋の全高が比較的大きくなり、これに付随して容器本体の口頸部の高さも比較的大きくなり、かかる点からも製造コストの低減が困難である。   However, in the provision of the tamper evidence characteristics by the above-described typical technique, it is particularly necessary to dispose the tamper evidence hem at the lower part of the skirt wall of the lid and to form the locking means on the inner peripheral surface thereof. Because of this, the amount of synthetic resin required to manufacture the lid is relatively large, it is difficult to sufficiently reduce the manufacturing cost, and the overall height of the lid is relatively large. The height of the mouth and neck of the main body also becomes relatively large, and it is difficult to reduce the manufacturing cost from this point.

上記典型的技法における上記のとおりの問題を解決する技法として、下記特許文献1、2及び3には、容器本体の口頸部の適宜部位と蓋の適宜部位とを、例えば溶着によって相互に係止せしめることが提案されている。蓋を開方向に回転せしめると、容器本体の口頸部と蓋との相互係止が解除され或いは蓋に形成されている破断可能ラインが破断され、かくして蓋が開方向に回転せしめられたことが明示される。   As techniques for solving the above-described problems in the above typical technique, Patent Documents 1, 2 and 3 below relate an appropriate part of the mouth and neck of the container body and an appropriate part of the lid to each other, for example, by welding. It has been proposed to stop. When the lid is rotated in the opening direction, the interlock between the mouth neck of the container body and the lid is released, or the breakable line formed on the lid is broken, and thus the lid is rotated in the opening direction. Is specified.

実開昭61−169046号公報Japanese Utility Model Publication No. 61-169046 特開2002−302133号公報JP 2002-302133 A 国際公開WO2005/085077号公報International Publication WO2005 / 085077

本発明者等の経験によれば、上記特許文献1、2及び3に開示されている技法には、(1)容器本体の口頸部を開封する際に蓋に加えなければならないトルク、特に蓋を開方向に回転する際の初期トルクが相当大きく、特に女性乃至子供にとって開封操作が相当困難である、及び/又は(2)蓋が開方向に回転されたことを示す痕跡、即ち容器本体の口頸部と蓋との相互係止の解除、が必ずしも明確に表示されず、タンパーエビデント特性が不充分である、という解決すべき問題が存在する。蓋を開方向に回転する際の初期トルクが過大になる原因は、所要密封部位が容器本体の口頸部に密接にされている蓋を口頸部に対して回転開始するための必要トルクと共に容器本体の口頸部と蓋との相互係止を解除するための必要トルクとの双方が回転開始初期に同時に必要とされることによる。   According to the experience of the present inventors, the techniques disclosed in Patent Documents 1, 2, and 3 described above include (1) torque that must be applied to the lid when opening the mouth and neck of the container body, particularly The initial torque when the lid is rotated in the opening direction is considerably large, and the opening operation is particularly difficult for women or children, and / or (2) a trace indicating that the lid has been rotated in the opening direction, that is, the container body There is a problem to be solved that the release of the interlocking between the mouth neck and the lid is not clearly displayed and the tamper evidence characteristics are insufficient. The reason why the initial torque when the lid is rotated in the opening direction is excessive is that the required sealing part is in close contact with the mouth and neck of the container body, together with the necessary torque to start the rotation with respect to the mouth and neck. This is because both the necessary torque for releasing the mutual locking between the mouth neck of the container body and the lid are required at the beginning of the rotation at the same time.

かかる事実に鑑み、本発明者等は、先に、特願2009−137141号において、蓋を製造するための必要合成樹脂量を充分に低減し且つ蓋の全高(及び容器本体の口頸部の高さ)を低減することができることに加えて、容器本体の口頸部を開封する際に必要とされるトルクを適切な値にせしめることができ、そしてまた蓋が開方向に回転された場合にはかかる事実が明確に表示される、新規且つ改良された合成樹脂製蓋及びかかる蓋と容器本体との組み合わせから構成された容器を提供した。   In view of this fact, the present inventors previously described in Japanese Patent Application No. 2009-137141 that the amount of synthetic resin required for manufacturing the lid is sufficiently reduced and the total height of the lid (and the mouth and neck of the container body). In addition to being able to reduce the height), the torque required to open the mouth and neck of the container body can be brought to an appropriate value, and also when the lid is rotated in the opening direction Provided a new and improved synthetic resin lid and a container composed of a combination of the lid and the container body, in which such facts are clearly displayed.

本発明者等が先に提案した蓋は、合成樹脂から形成され天面壁及び該天面壁の周縁から垂下する円筒形状のスカート壁を有し、該スカート壁の内周面には雌螺条が形成されており、該スカート壁の外周面には蓋フランジが形成されており、該蓋フランジは周方向に間隔をおいて該スカート壁の該外周面の下端部から延出する複数個の延出片と、隣接する該延出片を接続している易破断接続片を有し、該延出片の各々は該スカート壁の該外周面の下端部に接続された接続基部、該接続基部から周方向片方向に延びる第一の周方向延出部、半径方向に延出する接続部を介して該第一の周方向延出部に接続され周方向他方向に延びる第二の周方向延出部及び延出端部を含む。該延出片の各々において、該延出端部は該接続基部に対して上下方向及び周方向の双方において少なくとも部分的に整合して半径方向外側に位置する。また、本発明者等が先に提案した容器は、上記蓋と共に円筒形状の口頸部を有する容器本体とから構成され、該容器本体の該口頸部の外周面には該蓋の該雌螺条と協働する該雄螺条が形成されている容器において、該容器本体の該口頸部の外周面には該雄螺条の下方において半径方向外方に延出する口頸部フランジが形成されており、該口頸部フランジの上面には上方に突出する複数個の被係止手段が周方向に間隔をおいて形成されており、該容器本体の該口頸部を該蓋によって密封する際には、該容器本体の該口頸部に該蓋を被嵌し該口頸部に対して該蓋を閉方向に相対的に回転せしめて該雄螺条に該雌螺条を螺合せしめることによって該容器本体の該口頸部に該蓋が装着され、かくして該蓋フランジの該延出片の各々の該延出端部が該口頸部フランジの該被係止手段の各々に対向して位置せしめられ、しかる後に該延出端部を加熱することによって該延出端部が該被係止手段に係止せしめられ、該容器本体の該口頸部を開封する際には、該口頸部に対して該蓋を開方向に回転せしめることによって、該蓋フランジの該易破断接続片が破断され、次いで該延出片が変形されて該蓋フランジの該延出片の各々の該延出端部が該スカート壁の下端に対して相対的に下方に変位され、しかる後に該口頸部フランジの該被係止手段から該蓋フランジの該延出片の該延出端部が離脱される及び/又は該延出片が破断される。   The lid previously proposed by the present inventors has a top wall formed of a synthetic resin and a cylindrical skirt wall that hangs down from the periphery of the top wall. A female thread is formed on the inner peripheral surface of the skirt wall. A lid flange is formed on the outer peripheral surface of the skirt wall, and the lid flange has a plurality of extensions extending from the lower end portion of the outer peripheral surface of the skirt wall at intervals in the circumferential direction. A connecting base portion connected to the lower end portion of the outer peripheral surface of the skirt wall, the connecting base portion having an easily accessible connecting piece connecting the extending piece and the adjacent extending piece; A first circumferentially extending portion extending in one circumferential direction from the second circumferential direction and a second circumferential direction extending in the other circumferential direction connected to the first circumferentially extending portion via a connecting portion extending in the radial direction An extension part and an extension end part are included. In each of the extended pieces, the extended end portion is positioned at the radially outer side at least partially in alignment in the vertical direction and the circumferential direction with respect to the connection base portion. Further, the container previously proposed by the present inventors is composed of a container body having a cylindrical mouth and neck portion together with the lid, and the female body of the lid is disposed on the outer peripheral surface of the mouth neck portion of the container body. In the container in which the male thread cooperating with the thread is formed, the outer peripheral surface of the mouth and neck part of the container body has a neck and neck flange extending radially outward below the male thread. A plurality of locking means protruding upward are formed on the upper surface of the mouth-and-neck flange at intervals in the circumferential direction, and the mouth-and-neck part of the container body is covered with the lid. When sealing by means of this, the lid is fitted on the mouth-neck portion of the container body, and the lid is rotated relative to the mouth-neck portion in the closing direction, so that the female thread is placed on the male thread. The lid is attached to the mouth-neck portion of the container body by screwing together, and thus the extension end of each of the extension pieces of the lid flange is connected to the mouth. The flange portion is positioned to face each of the locked means, and then the extended end portion is locked to the locked means by heating the extended end portion, and the container body When opening the mouth-and-neck part, the easily-breakable connecting piece of the lid flange is broken by rotating the lid in the opening direction with respect to the mouth-and-neck part, and then the extending piece is deformed. The extension end of each of the extension pieces of the lid flange is displaced downward relative to the lower end of the skirt wall, and then from the locked means of the mouth-and-neck flange. The extension end of the extension piece of the lid flange is removed and / or the extension piece is broken.

然るに、本発明者等が先に提案した上記蓋及び容器について、更に検討を重ねた結果、
容器本体の口頸部に蓋を装着して口頸部を密封する際に、蓋フランジの延出片の各々における延出端部を加熱して口頸部フランジの係止手段の各々に係止すると、加熱軟化された延出端部が半径方向内側に変位乃至流動して接続端部に接触する傾向がある。蓋を口頸部から離脱して口頸部を開封するために蓋を開方向に回転せしめる際には、延出片の各々において接続基部が延出端部に対して相対的に移動することが必要であるが、上述した如く延出片の各々において延出端部が接続基部に接触せしめられると、延出端部に対する接続基部の移動が阻害され、これによって蓋を開方向に回転せしめるための初期必要トルクが過大になってしまう虞があることが判明した。
However, as a result of further studies on the lid and container previously proposed by the present inventors,
When the lid is attached to the mouth / neck portion of the container body and the mouth / neck portion is sealed, the extension end of each extension piece of the lid flange is heated to engage with each of the locking means of the mouth / neck flange. When stopped, the heat-softened extended end portion tends to displace or flow inward in the radial direction and come into contact with the connection end portion. When the lid is rotated in the opening direction to remove the lid from the mouth and neck and open the mouth and neck, the connection base of each extension piece moves relative to the extension end. However, as described above, in each of the extended pieces, when the extended end portion is brought into contact with the connection base portion, the movement of the connection base portion with respect to the extended end portion is hindered, thereby rotating the lid in the opening direction. It has been found that there is a possibility that the initial required torque for the operation may become excessive.

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容器において、容器本体の口頸部に蓋を装着して口頸部を密封する際の蓋装着方法に改良を加えて、口頸部を開封するために蓋を開方向に回転せしめる際に延出片の各々における延出端部が接続基部に接触して延出端部に対する接続基部の移動を阻害することを回避することである。   The present invention has been made in view of the above-mentioned facts, and the main technical problem thereof is that the container previously proposed by the present inventors is equipped with a lid on the mouth and neck of the container body to seal the mouth and neck. When the lid is rotated in the opening direction to improve the lid mounting method when opening the mouth and neck, the extension end of each extension piece contacts the connection base and the extension end It is to avoid obstructing the movement of the connection base with respect to.

本発明者等は、更に検討を重ねた結果、蓋フランジの延出片の各々における延出端部を口頸部フランジの係止手段の各々に係止する際に、延出端部を接続基部に対して下方に変位せしめることによって上記主たる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 further studies, the present inventors have connected the extended end portion when the extended end portion of each of the extended pieces of the lid flange is locked to each of the locking means of the mouth-and-neck flange. It has been found that the main technical problem can be achieved by displacing the base part downward.

即ち、本発明によれば、上記主たる技術的課題を達成する蓋装着方法として、合成樹脂から形成され天面壁及び該天面壁の周縁から垂下する円筒形状のスカート壁を有し、該スカート壁の内周面には雌螺条が形成されており、該スカート壁の外周面には蓋フランジが形成されており、該蓋フランジは周方向に間隔をおいて該スカート壁の該外周面の下端部から延出する複数個の延出片と、隣接する該延出片を接続している易破断接続片を有し、該延出片の各々は該スカート壁の該外周面の下端部に接続された接続基部、該接続基部から周方向片方向に延びる第一の周方向延出部、半径方向に延出する接続部を介して該第一の周方向延出部に接続され且つ周方向他方向に延びる第二の周方向延出部及び延出端部を含み、該延出端部は該接続基部に対して上下方向及び周方向の双方において少なくとも部分的に整合して半径方向外側に位置する蓋を、
円筒形状の口頸部を有し、該口頸部の外周面には該雄螺条の下方において半径方向外方に延出する口頸部フランジが形成されており、該口頸部フランジの上面には上方に突出する複数個の被係止手段が周方向に間隔をおいて形成されている容器本体に装着して該口頸部を密封する蓋装着方法において、
該容器本体の該口頸部に該蓋を被嵌し該口頸部に対して該蓋を閉方向に相対的に回転せしめて該雄螺条に該雌螺条を螺合せしめることによって該容器本体の該口頸部に該蓋を装着し、かくして該蓋フランジの該延出片の各々の該延出端部が該口頸部フランジの該被係止手段の各々に対して上方に間隔をおいて対向して位置せしめ、次いで該蓋フランジの該延出片の各々の該延出端部を押圧し加熱することによって、該延出端部を該接続基部に対して下方に変位せしめると共に該被係止手段に係止せしめる、
ことを特徴とする蓋装着方法が提供される。
That is, according to the present invention, as a lid mounting method for achieving the main technical problem, the lid has a top surface wall formed from a synthetic resin and a cylindrical skirt wall depending from the periphery of the top surface wall. A female thread is formed on the inner peripheral surface, a lid flange is formed on the outer peripheral surface of the skirt wall, and the lid flange is spaced apart in the circumferential direction at the lower end of the outer peripheral surface of the skirt wall A plurality of extending pieces extending from the portion and an easily breakable connecting piece connecting the adjacent extending pieces, and each of the extending pieces is provided at a lower end portion of the outer peripheral surface of the skirt wall. Connected to and connected to the first circumferential extension through a connected connection base, a first circumferential extension extending in one circumferential direction from the connection base, and a connection extending in the radial direction. A second circumferentially extending portion and an extending end portion extending in the other direction, the extending end portion being the connection base portion The lid is positioned radially outward at least partially aligned in both vertical and circumferential directions for,
A mouth-and-neck portion having a cylindrical shape is formed, and a mouth-and-neck flange extending radially outwardly below the male thread is formed on the outer peripheral surface of the mouth-and-neck portion. In the lid mounting method in which a plurality of locked means projecting upward on the upper surface are mounted on a container body formed at intervals in the circumferential direction, and the mouth and neck are sealed,
The lid is fitted onto the mouth-neck portion of the container body, the lid is rotated relative to the mouth-neck portion in the closing direction, and the female thread is screwed onto the male thread. The lid is attached to the mouth-and-neck portion of the container body, and thus the extension end of each of the extension pieces of the lid flange is directed upward with respect to each of the locking means of the mouth-and-neck flange. Displace the extension end downward with respect to the connection base by pressing and heating the extension end of each of the extension pieces of the lid flange. And locking with the locked means,
A lid mounting method is provided.

好適には、該延出端部はその上面が該接続基部の下面よりも下方に位置するように該接続基部に対して下方に変位せしめられる。超音波溶着機の円筒形状ホーン下端を該蓋フランジの半径方向外側部に当接せしめて該ホーンを下降せしめると共に超音波を発振せしめることによって、該延出端部を該接続基部に対して下方に変位せしめると共に該被係止手段に係止せしめるのが好ましい。該蓋フランジの該延出片の各々の該延出端部の半径方向幅は該第一の周方向延出部、該接続部及び該第二の周方向延出部の幅よりも大きいのが好都合である。好適には、該蓋フランジの該延出片の各々の該第一の周方向延出部は該容器本体の該口頸部を開封する際の該蓋の回転方向である開方向に延出し、該第二の周方向延出部は該延出端部まで該容器本体の該口頸部に該蓋を装着して口頸部を密封する際の該蓋の回転方向である閉方向に延出する。好ましくは、該蓋フランジの該易破断接続片は該延出片の該延出端部と隣接する該延出片の該接続部とを接続している。該容器本体は該蓋を形成している合成樹脂とは異なった合成樹脂から形成されているのが好都合である。   Preferably, the extended end portion is displaced downward with respect to the connection base so that the upper surface thereof is located below the lower surface of the connection base. The lower end of the ultrasonic welding machine is lowered with respect to the connection base by bringing the lower end of the cylindrical horn into contact with the radially outer side of the lid flange to lower the horn and oscillate ultrasonic waves. It is preferable to be displaced to the locked means and to be locked to the locked means. The radial width of the extending end of each of the extending pieces of the lid flange is larger than the width of the first circumferentially extending portion, the connecting portion, and the second circumferentially extending portion. Is convenient. Preferably, the first circumferentially extending portion of each of the extending pieces of the lid flange extends in an opening direction that is a rotation direction of the lid when the mouth neck portion of the container body is opened. The second circumferentially extending portion is closed in the closing direction which is the rotational direction of the lid when the lid is attached to the mouth and neck of the container body to seal the mouth and neck up to the extending end. Extend. Preferably, the easily breakable connecting piece of the lid flange connects the extending end portion of the extending piece and the connecting portion of the extending piece adjacent thereto. Conveniently, the container body is formed from a synthetic resin different from the synthetic resin forming the lid.

本発明の蓋装着方法においては、蓋フランジの延出片の各々における延出端部を口頸部フランジの係止手段の各々に係止せしめる際に、延出片の各々における延出端部が接続基部に対して下方に変位せしめられ、それ故に加熱軟化された延出端部が半径方向内側に変位乃至流動せしめられても、延出端部が接続基部に接触することが回避され、かくして蓋を開方向に回転せしめるための初期必要トルクが過大になってしまうことが回避される。   In the lid mounting method of the present invention, when the extended end portion of each of the extended pieces of the lid flange is locked to each of the locking means of the mouth-and-neck flange, the extended end portion of each of the extended pieces Is displaced downward with respect to the connection base, and therefore, even if the heat-softened extension end is displaced or flowed radially inward, it is avoided that the extension end comes into contact with the connection base. Thus, it is avoided that the initial required torque for rotating the lid in the opening direction is excessive.

本発明に従って構成された容器における容器本体の口頸部と蓋とを、口頸部に蓋を装着する前の状態で示す斜面図。The slope view which shows the mouth neck part and lid | cover of a container main body in the container comprised according to this invention in the state before mounting | wearing a mouth neck part with a lid | cover. 図1に示す口頸部を、一部を断面で示す正面図。The front view which shows a part of mouth neck shown in FIG. 1 in a cross section. 図1に示す口頸部の平面図。The top view of the mouth neck part shown in FIG. 図1に示す蓋を、一部を断面で示す正面図。The front view which shows a part of cover shown in FIG. 1 in cross section. 図1に示す蓋の平面図。The top view of the lid | cover shown in FIG. 図1に示す口頸部の雄螺条に図1に示す蓋の雌螺条を螺合せしめた状態を、一部を断面で示す正面図。The front view which shows the state which screwed together the female thread of the lid | cover shown in FIG. 1 to the male thread of the mouth neck part shown in FIG. 図6に示すとおりの状態において、更に蓋の延出片の各々の延出端部を押圧し加熱した状態を、一部を断面で示す正面図。FIG. 7 is a front view showing a part in cross-section in a state as shown in FIG. 6, further pressing and heating each extended end portion of the extended piece of the lid. 図7における延出片の延出端部と口頸部フランジの被係止手段との関係を示す拡大断面図。The expanded sectional view which shows the relationship between the extension end part of the extension piece in FIG. 7, and the to-be-latched means of an opening-and-neck part flange. 図1に示す口頸部に図1に示す蓋を所要とおりに装着した状態を、一部を断面で示す正面図。The front view which shows the state which mounted | wore the mouth neck part shown in FIG. 1 with the lid | cover shown in FIG. (a)、(b)及び(c)は、夫々、図6に示す状態から蓋を開方向に漸次回転せしめた時の状態変化を示す正面図。(A), (b) and (c) are front views showing a state change when the lid is gradually rotated in the opening direction from the state shown in FIG. 図6に示す状態から蓋を開方向に回転せしめて口頸部から離脱した後に、蓋4を再び口頸部に装着した状態を示す斜面図。FIG. 7 is a perspective view showing a state in which the lid is attached to the mouth and neck again after the lid is rotated in the opening direction from the state shown in FIG. 6 and detached from the mouth and neck.

図1には、本発明の蓋装着方法が適用される容器の好適実施形態における容器本体の口頸部2及びこの口頸部2に適用される蓋4が図示されている。   FIG. 1 shows a mouth / neck portion 2 of a container body and a lid 4 applied to the mouth / neck portion 2 in a preferred embodiment of a container to which the lid mounting method of the present invention is applied.

図1と共に図2及び図3を参照して説明すると、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されているのが好都合である図示の容器本体は、全体として円筒形状である口頸部2を有する。口頸部2の外周面には雄螺条6が形成されている。この雄螺条6には周方向に間隔をおいた複数個の領域、図示の実施形態では4個の領域にて通気用切欠8が形成されている。口頸部4の外周面には、更に、雄螺条6の下方において半径方向外方に延出する口頸部フランジ10が形成されており、この口頸部フランジ10の上面には上方に突出する複数個、図示の実施形態においては8個、の被係止手段12a乃至12hが周方向に間隔をおいて形成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、口頸部フランジ10は円環板形状であり、その外周部はその内周部に比べて幾分薄くせしめられている。口頸部フランジ10の上面と側面との境界領域及び側面と下面の境界領域は断面図において円弧状にせしめられている。被係止手段12a乃至12hの各々は、口頸部フランジ10の外周部上に図3において左右方向に若干の間隔をおいて図3において上下方向に延びる複数個の突状から構成されている。更に詳述すると、被係止手段12a及び12eは5個の突状から構成され、被係止手段12b、12d、12f及び12hは3個の突状から構成され、被係止手段12c及び12gは2個の突状から構成されている。口頸部2を含む容器本体は図3において上下方向に分割される割型部材から構成された成形型を使用して好都合に成形されるが、被係止手段12a乃至12hを構成する突状は図3において上下方向に延在する形態である故に、被係止手段12a乃至12hの配設に起因して成形型から容器本体を型抜きする際に所謂無理抜きが生成されることはない。口頸部フランジ10の上面には、更に、その上面の外周縁部に雄螺条6の上端の角度位置に対応して略三角形状の凹部14が形成されている。   Referring to FIGS. 2 and 3 together with FIG. 1, the illustrated container body, which is advantageously formed from a suitable synthetic resin such as polyethylene terephthalate, has a mouth-and-neck portion 2 that is generally cylindrical. Have. A male thread 6 is formed on the outer peripheral surface of the mouth-and-neck portion 2. The male screw 6 is formed with ventilation notches 8 in a plurality of regions spaced in the circumferential direction, and in the illustrated embodiment, four regions. On the outer peripheral surface of the mouth-and-neck portion 4 is further formed a mouth-and-neck flange 10 extending radially outwardly below the male thread 6. It is important that a plurality of protruding means, that is, eight locked means 12a to 12h in the illustrated embodiment, are formed at intervals in the circumferential direction. In the illustrated embodiment, the mouth-and-neck flange 10 has an annular plate shape, and its outer peripheral portion is made somewhat thinner than its inner peripheral portion. The boundary region between the upper surface and the side surface and the boundary region between the side surface and the lower surface of the mouth-and-neck flange 10 are arcuate in the cross-sectional view. Each of the locked means 12a to 12h is formed of a plurality of protrusions extending on the outer periphery of the mouth-and-neck flange 10 and extending in the vertical direction in FIG. . More specifically, the locked means 12a and 12e are constituted by five protrusions, and the locked means 12b, 12d, 12f and 12h are constituted by three protrusions, and the locked means 12c and 12g. Consists of two protrusions. The container body including the mouth / neck portion 2 is conveniently formed using a forming die composed of a split member that is divided in the vertical direction in FIG. 3, but a protruding shape that constitutes the locked means 12a to 12h. 3 is a form extending in the vertical direction in FIG. 3, so that the so-called forcible punching is not generated when the container body is punched from the mold due to the arrangement of the locked means 12a to 12h. . On the upper surface of the mouth-and-neck flange 10, a substantially triangular recess 14 is formed on the outer peripheral edge of the upper surface corresponding to the angular position of the upper end of the male screw 6.

図1と共に図4及び図5を参照して説明を続けると、容器本体と同一の合成樹脂から形成することもできるが、口頸部2に対する密封性及び成形の容易性等の点から容器本体とは異なった合成樹脂、例えば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形成されているのが好都合である蓋4は、円形天面壁16及びこの天面壁16の周縁から垂下する円筒形スカート壁18を有する。天面壁16の内面における外周縁部には下方に延出する2条の筒状シール片、即ち外側筒状シール片20及び内側筒状シール片22が配設されている。更に、天面壁16の内面における中央領域には周方向に間隔をおいて半径方向に延びる複数個の突状24が形成されている(図4にそのうちの3個の突状24が図示されている)。スカート壁18の内周面には雌螺条26が形成されている。この雌螺条26には周方向に間隔おいた複数個の領域において通気用切欠28が形成されている。天面壁16の外面外周縁部からスカート壁18の外周面下端までの領域には、そこに掛けられる指の滑りを防止するための多数の凹凸30が形成されている。   4 and 5 together with FIG. 1, the container body can be formed from the same synthetic resin as the container body. The lid 4, which is advantageously formed from a different synthetic resin, for example a suitable synthetic resin such as polypropylene or polyethylene, has a circular top wall 16 and a cylindrical skirt wall 18 depending from the periphery of the top wall 16. Have Two cylindrical seal pieces extending downward, that is, an outer cylindrical seal piece 20 and an inner cylindrical seal piece 22 are disposed on the outer peripheral edge of the inner surface of the top wall 16. Furthermore, a plurality of protrusions 24 extending in the radial direction are formed in the central region on the inner surface of the top wall 16 (Fig. 4 shows three protrusions 24 shown in FIG. 4). ) A female thread 26 is formed on the inner peripheral surface of the skirt wall 18. The female thread 26 is formed with ventilation notches 28 in a plurality of regions spaced in the circumferential direction. In the region from the outer peripheral edge of the top surface wall 16 to the lower end of the outer peripheral surface of the skirt wall 18, a large number of projections and depressions 30 are formed for preventing the slipping of the fingers hung thereon.

図1と共に図4及び図5を参照して説明を続けると、スカート壁18の外周面にはその下端部から半径方向外方に延出する蓋フランジ32が形成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、蓋フランジ32は全体として円環板形状であり、周方向に等間隔をおいてスカート壁18の下端から延出する複数個、図示の場合は8個、の延出片34を含んでいる。延出片34の各々は、スカ−ト壁18の外周面に接続された接続基部36、かかる接続基部36から開方向(図5において反時計方向)、即ち後述するとおりにして容器本体の口頸部2を開封する際の蓋4の回転方向、に円弧状に延びる第一の周方向延出部38、第一の周方向延出部38の延出端から半径方向外方に延出する接続部40、接続部40の延出端から閉方向(図5において時計方向)、即ち後述するとおりにして容器本体の口頸部2に蓋4を装着して口頸部2を密封する際の蓋4の回転方向、に円弧状に延出する第二の周方向延出部42及び第二の周方向延出部42の延出端から更に閉方向に円弧状に延出する延出端部44を有する。延出片34の各々における延出端部44は上下方向と周方向との双方において少なくとも部分的に接続基部36に整合して位置せしめられている。図示の実施形態においては、延出片34の各々における接続基部36と延出端部44とは同一角度領域に位置せしめられており、延出端部44の上面は接続基部36の上面と実質上同高である。図1及び図5を参照することによって明確に理解される如く、延出片34の各々における接続基部36及び延出端部44の幅は他の部分即ち第一の周方向延出部38、接続部40及び第二の周方向延出部42の幅よりも大きくせしめられている。また、延出片34の各々において、接続基部36、第一の周方向延出部38及び接続部40の厚さは、第二の周方向延出部42及び延出端部44の厚さよりも幾分小さく設定されている。蓋フランジ32は、更に、延出片34を順次に接続する(換言すれば、隣接する延出片34間を接続する)複数個、図示の場合は8個、の易破断接続片46を含んでいる。図示の実施形態においては、易破断接続片46は隣接する延出片34の一方の延出端部44と接続部40とを接続している。易破断接続片46の横断面積は充分に小さく、易破断接続片46の破断強度は比較的小さい。   4 and 5 together with FIG. 1, it is important that the outer peripheral surface of the skirt wall 18 is formed with a lid flange 32 extending radially outward from its lower end. . In the illustrated embodiment, the lid flange 32 is generally in the shape of an annular plate, and a plurality of, in the illustrated case, eight are extended from the lower end of the skirt wall 18 at equal intervals in the circumferential direction. A piece 34 is included. Each of the extending pieces 34 has a connection base 36 connected to the outer peripheral surface of the skirt wall 18, and an opening direction (counterclockwise in FIG. 5) from the connection base 36, that is, as described later. A first circumferentially extending portion 38 extending in an arc shape in the rotational direction of the lid 4 when the neck 2 is opened, and extending radially outward from the extending end of the first circumferentially extending portion 38. The connecting portion 40 is closed from the extending end of the connecting portion 40 (clockwise in FIG. 5), that is, as described later, the lid 4 is attached to the mouth neck portion 2 of the container body to seal the mouth neck portion 2. The second circumferentially extending portion 42 extending in an arc shape in the rotating direction of the lid 4 and the extending end of the second circumferentially extending portion 42 further extending in an arc shape in the closing direction An exit end 44 is provided. The extension end 44 in each of the extension pieces 34 is positioned at least partially aligned with the connection base 36 in both the vertical direction and the circumferential direction. In the illustrated embodiment, the connection base 36 and the extension end 44 in each of the extension pieces 34 are positioned in the same angle region, and the upper surface of the extension end 44 is substantially the same as the upper surface of the connection base 36. It is the same high. As clearly understood by referring to FIGS. 1 and 5, the width of the connection base 36 and the extension end 44 in each of the extension pieces 34 is the other portion, that is, the first circumferential extension 38, The width of the connecting portion 40 and the second circumferentially extending portion 42 is made larger. In each of the extended pieces 34, the thickness of the connection base 36, the first circumferential extension 38, and the connection 40 is greater than the thickness of the second circumferential extension 42 and the extension end 44. Is set somewhat smaller. The lid flange 32 further includes a plurality of, in the illustrated case, eight easily breakable connecting pieces 46 for connecting the extending pieces 34 in sequence (in other words, connecting the adjacent extending pieces 34). It is out. In the illustrated embodiment, the easily breakable connecting piece 46 connects one extending end 44 of the adjacent extending piece 34 and the connecting portion 40. The cross-sectional area of the easily breakable connecting piece 46 is sufficiently small, and the breaking strength of the easily breakable connecting piece 46 is relatively small.

図1と共に図6を参照して説明を続けると、容器本体1内に清涼飲料の如き内容物を充填した後に容器本体の口頸部2に蓋4を装着して口頸部2を密封する際には、口頸部2に蓋4を被嵌し蓋4を閉方向、即ち図6において上方から見て時計方向、に回転せしめ、かくして口頸部2の雄螺条6に蓋4の雌螺条26を螺合せしめる。蓋4は閉方向への回転と共に下方に移動せしめられ、そして雄螺条6に雌螺条26を所要トルクで充分に螺合せしめると、図6に明確に図示する如く、蓋4の天面壁16の内面に形成されている外側筒状シール片20及び内側筒状シール片22が、夫々、口頸部2の外周面及び内周面に密接せしめられて口頸部2が密封される。そしてまた、蓋フランジ32の延出片34の各々の延出端部44が口頸部フランジ10の被係止手段12a乃至12hの各々に対向して位置せしめられる。口頸部2の雄螺条6に蓋4の雌螺条26を所要トルクで充分に螺合せしめた状態、即ち図6に図示する状態において、延出片34の各々の延出端部44は口頸部フランジ10の被係止手段12a乃至12hの各々に対して間隔xをおいて上方に位置するのが好適である。間隔xは延出片34の各々にお0ける接続基部36の厚さ以上、特に接続基部36の厚さよりも0.5乃至1.0mm程度大きいのが好適である。   The description will be continued with reference to FIG. 1 and FIG. 6, and after filling the container body 1 with a content such as a soft drink, the mouth and neck part 2 of the container body is attached with a lid 4 to seal the mouth and neck part 2. In this case, the lid 4 is fitted on the mouth-and-neck portion 2 and the lid 4 is rotated in the closing direction, that is, clockwise when viewed from above in FIG. The female thread 26 is screwed together. The lid 4 is moved downward with the rotation in the closing direction, and when the female thread 26 is sufficiently screwed to the male thread 6 with a required torque, the top wall of the lid 4 is clearly shown in FIG. The outer cylindrical seal piece 20 and the inner cylindrical seal piece 22 formed on the inner surface of 16 are brought into close contact with the outer peripheral surface and the inner peripheral surface of the mouth-and-neck portion 2 to seal the mouth-and-neck portion 2. Further, each extended end 44 of the extended piece 34 of the lid flange 32 is positioned to face each of the locked means 12a to 12h of the mouth / neck flange 10. In a state in which the female thread 26 of the lid 4 is sufficiently screwed to the male thread 6 of the mouth-and-neck section 2 with a required torque, that is, in the state illustrated in FIG. 6, each extended end 44 of the extended piece 34. Is preferably positioned above the locking means 12a to 12h of the mouth-and-neck flange 10 with an interval x therebetween. The distance x is preferably equal to or greater than the thickness of the connection base 36 at each of the extended pieces 34, particularly about 0.5 to 1.0 mm larger than the thickness of the connection base 36.

次いで、図7に図示する如く、延出片34の各々の延出端部44を口頸部フランジ10かかる押圧及び加熱は、超音波溶着機のホーンの先端に配設され延出片34の各々の延出端部44に対応して位置する8個の突出片48(図7(a)には1個の突出片48のみを図示している)を延出片34の各々の延出端部44に当接せしめて下方に強制しながら超音波を発振することによって好都合に遂行することができる。の被係止手段12a乃至12hの各々に押圧して加熱する。かくすると、図7及び図9に明確に図示する如く、延出片34の各々において、接続基部36に対して延出端部44が下方に変位せしめられ、好ましくは延出端部44の上面が接続基部36の下面よりも幾分下方に位置せしめられる。延出片34の各々の延出端部44は下方に変位せしめられて口頸部フランジ10の被係止手段12a乃至12hに押し付けられる共に局部的に加熱溶融され、これによって図8に明確に図示する如く、延出片34の各々の延出端部44が被係止手段12a乃至12hを構成している複数個の突状を部分的に包み込む状態に変形され、延出片34の各々の延出端部44が被係止手段12a乃至12hに係止せしめられる。この際には延出片34の各々における延出端部44が半径方向内側に変位乃至流動する傾向があるが、延出端部44は接続基部36に対して下方に変位されている故に、延出端部44の半径方向内側面が接続基部36の半径方向外側面に接触されることはない。延出片34の各々の延出端部44が軟化乃至溶融されると、延出端部44が被係止手段12a乃至12hに溶着され得るが、一般に、蓋4を形成している合成樹脂と容器本体を形成している合成樹脂が異なるものである場合には、上記溶着は生成されるとしても溶着強度は著しく小さい。一方、蓋4を形成している合成樹脂と容器本体を形成している合成樹脂とが実質上同一のもの或いは近似したものである場合には、延出片34の各々と被係止手段12a乃至12hとの溶着は比較的強くなる。この場合には、延出片34の各々の延出端部44を変形せしめることなく、延出片34の各々の延出端部44と被係止手段12a乃至12hとの係止を両者間の溶着のみに依存することもできる。   Next, as shown in FIG. 7, the pressing and heating of each extending end 44 of the extending piece 34 to the mouth-and-neck flange 10 is arranged at the tip of the horn of the ultrasonic welder. Eight protruding pieces 48 (only one protruding piece 48 is shown in FIG. 7A) positioned corresponding to each extending end 44 are extended to each of the extending pieces 34. This can be done conveniently by oscillating ultrasonic waves while abutting against the end 44 and forcing downward. Each of the locked means 12a to 12h is pressed and heated. Thus, as clearly shown in FIGS. 7 and 9, in each of the extended pieces 34, the extended end portion 44 is displaced downward with respect to the connection base portion 36, and preferably the upper surface of the extended end portion 44. Is positioned somewhat below the lower surface of the connection base 36. Each extension end 44 of the extension piece 34 is displaced downward and pressed against the locking means 12a to 12h of the mouth-and-neck flange 10, and is locally heated and melted, thereby making it clear in FIG. As shown in the drawing, each extended end portion 44 of the extended piece 34 is deformed so as to partially enclose a plurality of protrusions constituting the locked means 12a to 12h. The extended end portion 44 is locked to the locked means 12a to 12h. At this time, the extended end portion 44 of each of the extended pieces 34 tends to be displaced or flowed inward in the radial direction, but the extended end portion 44 is displaced downward with respect to the connection base portion 36. The radially inner surface of the extended end portion 44 is not in contact with the radially outer surface of the connection base 36. When each extended end 44 of the extended piece 34 is softened or melted, the extended end 44 can be welded to the locked means 12a to 12h. Generally, the synthetic resin forming the lid 4 is used. When the synthetic resin forming the container body is different, the welding strength is remarkably small even if the welding is generated. On the other hand, when the synthetic resin forming the lid 4 and the synthetic resin forming the container body are substantially the same or similar, each of the extended pieces 34 and the locked means 12a The welding with 12 to 12 h becomes relatively strong. In this case, the extension end portion 44 of the extension piece 34 and the locked means 12a to 12h are locked between the two without deforming each extension end portion 44 of the extension piece 34. It is also possible to rely only on welding.

容器内容物を消費するために容器本体の口頸部2を開封する際には、蓋4を開方向、即ち図9において上方から見て反時計方向、に回転せしめる。容器本体の口頸部2に対して蓋4が開方向に回転せしめられると、蓋フランジ32の延出片34の各々における接続基部36は蓋4の回転に付随して開方向に移動せしめられる。一方、延出端部44は口頸部フランジ10の被係止手段12a乃至12hに係止せしめられている故に開方向への移動が阻止される。蓋4が図10(a)に図示される位置まで開方向に回転せしめられると、蓋フランジ32の延出片34及び易破断接続片46の各々は弾性的に若干伸張せしめられ、そしてまた延出片34の各々における第一の周方向延出部38及び第二の周方向延出部42が、夫々、開方向に向かって下方及び上方に傾斜せしめられる。蓋4の開方向への回転が更に進行すると、図10(b)に図示する如く、蓋フランジ32における易破断接続片46が破断され、そしてまた延出片34の各々における第一の周方向延出部38及び第二の周方向延出部42の傾斜が増大せしめられ、第一の周方向延出部38も開方向に向かって上方に傾斜するようになる。蓋4の開方向への回転が更に進行すると、図10(c)に図示する如く、蓋フランジ32の延出片34の各々における延出端部44が口頸部フランジ10の被係止手段12a乃至12hから離脱される。かくすると、蓋フランジ32の延出片34の各々における第一の周方向延出部38及び第二の周方向延出部42の傾斜は弾性的復元によって低減せしめられ、第一の周方向延出部38は開方向に向かって下方に傾斜する状態に戻る(図11を参照されたい)。蓋フランジ32の延出片34の各々における延出端部44が口頸部フランジ10の被係止手段12a乃至12hから離脱された後においては、蓋4の開方向への回転に応じて蓋4の全体が上昇せしめられ、蓋4が口頸部2から離脱されて口頸部2が開封される。蓋フランジ32の易破断接続片46の破断は蓋4の開方向への回転開始と同時ではなくて蓋4の開方向の回転が幾分進行した時点で遂行され、そしてまた蓋フランジ32の延出片34の各々における延出端部44が口頸部フランジ10の被係止手段12a乃至12hから離脱されるのは蓋4の開方向への回転が更に進行した時点である。かような次第であるので、蓋4の開方向への回転開始時、蓋フランジ32の易破断接続片46の破断時、及び口頸部フランジ10の被係止手段12a乃至12hからの蓋フランジ32の延出片34の各々の延出端部44の離脱時に、蓋4に加えるべきトルクが過大になることはない。容器本体の口頸部2から離脱せしめられた蓋4においては、図9に明確に図示する如く、蓋フランジ32における易破断接続片46の各々が破断されていると共に、蓋フランジ32の延出片34の各々の第一周方向延出部36及び第二の周方向延出部40が水平に延在するのではなくて傾斜して延在する状態に変形されており、それ故に蓋4が開方向に回転され容器本体の口頸部2が開封されていることが明示される。   When the mouth and neck portion 2 of the container body is opened to consume the container contents, the lid 4 is rotated in the opening direction, that is, counterclockwise as viewed from above in FIG. When the lid 4 is rotated in the opening direction with respect to the mouth-and-neck portion 2 of the container body, the connection base 36 in each of the extending pieces 34 of the lid flange 32 is moved in the opening direction in association with the rotation of the lid 4. . On the other hand, since the extended end portion 44 is locked by the locked means 12a to 12h of the mouth-and-neck flange 10, movement in the opening direction is prevented. When the lid 4 is rotated in the opening direction to the position shown in FIG. 10 (a), each of the extended piece 34 and the easily breakable connecting piece 46 of the lid flange 32 is elastically slightly stretched and extended. The first circumferentially extending portion 38 and the second circumferentially extending portion 42 in each of the protruding pieces 34 are inclined downward and upward in the opening direction, respectively. When the rotation of the lid 4 in the opening direction further proceeds, as shown in FIG. 10B, the easily breakable connecting piece 46 in the lid flange 32 is broken, and the first circumferential direction in each of the extending pieces 34 is also obtained. The inclination of the extension part 38 and the second circumferential extension part 42 is increased, and the first circumferential extension part 38 is also inclined upward in the opening direction. When the rotation of the lid 4 in the opening direction further proceeds, as shown in FIG. 10 (c), the extension end portions 44 of the extension pieces 34 of the lid flange 32 are locked by the locking means of the mouth-neck flange 10. Detach from 12a to 12h. Thus, the inclination of the first circumferential extension 38 and the second circumferential extension 42 in each of the extension pieces 34 of the lid flange 32 is reduced by elastic restoration, and the first circumferential extension The protruding portion 38 returns to the state of being inclined downward in the opening direction (see FIG. 11). After the extended end portion 44 of each of the extended pieces 34 of the lid flange 32 is detached from the locked means 12a to 12h of the mouth-and-neck flange 10, the lid 4 is rotated according to the rotation of the lid 4 in the opening direction. 4 is raised, the lid 4 is detached from the mouth neck 2 and the mouth neck 2 is opened. The breakage of the easily breakable connecting piece 46 of the lid flange 32 is not performed simultaneously with the start of the rotation of the lid 4 in the opening direction, but at the time when the rotation of the lid 4 in the opening direction has progressed to some extent. The extended end 44 of each of the protruding pieces 34 is detached from the locked means 12a to 12h of the mouth-and-neck flange 10 when the rotation of the lid 4 in the opening direction further proceeds. Therefore, when the lid 4 starts to rotate in the opening direction, when the easily breakable connecting piece 46 of the lid flange 32 is broken, and when the lid flange from the locked means 12a to 12h of the mouth-and-neck flange 10 is provided. The torque to be applied to the lid 4 does not become excessive when the extended end portion 44 of each of the 32 extended pieces 34 is detached. In the lid 4 detached from the mouth-and-neck portion 2 of the container body, each easily breakable connecting piece 46 in the lid flange 32 is broken and the extension of the lid flange 32 is clearly shown in FIG. The first circumferentially extending portion 36 and the second circumferentially extending portion 40 of each of the pieces 34 are deformed not to extend horizontally but to extend in an inclined manner, and therefore the lid 4 Is rotated in the opening direction to clearly show that the mouth-neck portion 2 of the container body is opened.

図示の実施形態においては、口頸部2の開封操作の際に、蓋フランジ32の延出片34の各々における延出端部44が口頸部フランジ10の被係止手段12a乃至12hから離脱されるが、所望ならば、延出片34の延出端部44と被係止手段12a乃至12hとの係止を比較的強固にせしめると共に延出片34の例えば接続部40に易破断部位を形成し、蓋フランジ32の延出片34の各々における延出端部44が口頸部フランジ10の被係止手段12a乃至12hから離脱されることに代えて、延出片34が破断されるように構成することもできる。   In the illustrated embodiment, during the opening operation of the mouth and neck portion 2, the extended end portion 44 of each of the extending pieces 34 of the lid flange 32 is detached from the locked means 12 a to 12 h of the mouth and neck portion flange 10. However, if desired, the locking between the extended end portion 44 of the extending piece 34 and the locked means 12a to 12h is made relatively strong, and an easily breakable portion of the connecting piece 40 of the extending piece 34, for example, is provided. Instead of the extended end 44 of each of the extended pieces 34 of the lid flange 32 being detached from the locked means 12a to 12h of the mouth-and-neck flange 10, the extended pieces 34 are broken. It can also be configured to be.

容器本体内の内容物を幾分か残留せしめた状態で口頸部2を仮密封することが望まれる場合には、図9に図示する如く、口頸部2に再び蓋4を被嵌し、蓋4を閉方向に回転せしめて蓋4の雌螺条26を口頸部2の雄螺条6に所要とおりに螺合せしめ、かくして蓋4の天面壁16の内面に形成されている外側筒状シール片20及び内側筒状シール片22を、夫々、口頸部2の外周面及び内周面に密接せしめればよい。   If it is desired to temporarily seal the mouth-and-neck part 2 with some contents in the container body remaining, the lid 4 is again fitted on the mouth-and-neck part 2 as shown in FIG. The lid 4 is rotated in the closing direction so that the female thread 26 of the lid 4 is screwed into the male thread 6 of the mouth-and-neck portion 2 as required, and thus the outside formed on the inner surface of the top wall 16 of the lid 4. The cylindrical seal piece 20 and the inner cylindrical seal piece 22 may be brought into close contact with the outer peripheral surface and the inner peripheral surface of the mouth-and-neck portion 2, respectively.

2:容器本体の口頸部
4:蓋
6:雄螺条
10:口頸部フランジ
12a乃至12h:被係止手段
16:天面壁
18:スカート壁
26:雌螺条
32:蓋フランジ
34:延出片
36:接続基部
38:第一の周方向延出部
40:接続部
42:第二の周方向延出部
44:延出端部
46:易破断接続片
48:超音波溶着機のホーンの突出片
2: mouth neck of container body 4: lid 6: male thread 10: mouth neck flange 12a to 12h: locked means 16: top wall 18: skirt wall 26: female thread 32: lid flange 34: extension Outlet 36: Connection base 38: First circumferential extension 40: Connection 42: Second circumferential extension 44: Extension end 46: Easily breakable connection 48: Ultrasonic welder horn Protruding piece

Claims (7)

合成樹脂から形成され天面壁及び該天面壁の周縁から垂下する円筒形状のスカート壁を有し、該スカート壁の内周面には雌螺条が形成されており、該スカート壁の外周面には蓋フランジが形成されており、該蓋フランジは周方向に間隔をおいて該スカート壁の該外周面の下端部から延出する複数個の延出片と、隣接する該延出片を接続している易破断接続片を有し、該延出片の各々は該スカート壁の該外周面の下端部に接続された接続基部、該接続基部から周方向片方向に延びる第一の周方向延出部、半径方向に延出する接続部を介して該第一の周方向延出部に接続され且つ周方向他方向に延びる第二の周方向延出部及び延出端部を含み、該延出端部は該接続基部に対して上下方向及び周方向の双方において少なくとも部分的に整合して半径方向外側に位置する蓋を、
円筒形状の口頸部を有し、該口頸部の外周面には該雄螺条の下方において半径方向外方に延出する口頸部フランジが形成されており、該口頸部フランジの上面には上方に突出する複数個の被係止手段が周方向に間隔をおいて形成されている容器本体に装着して該口頸部を密封する蓋装着方法において、
該容器本体の該口頸部に該蓋を被嵌し該口頸部に対して該蓋を閉方向に相対的に回転せしめて該雄螺条に該雌螺条を螺合せしめることによって該容器本体の該口頸部に該蓋を装着し、かくして該蓋フランジの該延出片の各々の該延出端部が該口頸部フランジの該被係止手段の各々に対して上方に間隔をおいて対向して位置せしめ、次いで該蓋フランジの該延出片の各々の該延出端部を押圧し加熱することによって、該延出端部を該接続基部に対して下方に変位せしめると共に該被係止手段に係止せしめる、
ことを特徴とする蓋装着方法。
The top surface wall is formed from a synthetic resin and has a cylindrical skirt wall depending from the periphery of the top surface wall. A female thread is formed on the inner peripheral surface of the skirt wall. A lid flange is formed, and the lid flange connects a plurality of extension pieces extending from the lower end portion of the outer peripheral surface of the skirt wall and the adjacent extension pieces at intervals in the circumferential direction. Each of the extending pieces is connected to a lower end portion of the outer peripheral surface of the skirt wall, and a first circumferential direction extending from the connecting base portion in one circumferential direction. Including a second circumferentially extending portion and an extending end connected to the first circumferentially extending portion and extending in the other circumferential direction via a connecting portion extending in the radial direction, The extending end is at least partially aligned with the connecting base in both the vertical and circumferential directions and has a radius A lid positioned in direction outwardly,
A mouth-and-neck portion having a cylindrical shape is formed, and a mouth-and-neck flange extending radially outwardly below the male thread is formed on the outer peripheral surface of the mouth-and-neck portion. In the lid mounting method in which a plurality of locked means projecting upward on the upper surface are mounted on a container body formed at intervals in the circumferential direction, and the mouth and neck are sealed,
The lid is fitted onto the mouth-neck portion of the container body, the lid is rotated relative to the mouth-neck portion in the closing direction, and the female thread is screwed onto the male thread. The lid is attached to the mouth-and-neck portion of the container body, and thus the extension end of each of the extension pieces of the lid flange is directed upward with respect to each of the locking means of the mouth-and-neck flange. Displace the extension end downward with respect to the connection base by pressing and heating the extension end of each of the extension pieces of the lid flange. And locking with the locked means,
A lid mounting method characterized by the above.
該延出端部はその上面が該接続基部の下面よりも下方に位置するように該接続基部に対して下方に変位せしめられる、請求項1記載の蓋装着方法。   The lid mounting method according to claim 1, wherein the extended end portion is displaced downward with respect to the connection base so that an upper surface thereof is located below a lower surface of the connection base. 超音波溶着機の円筒形状ホーン下端を該蓋フランジの半径方向外側部に当接せしめて該ホーンを下降せしめると共に超音波を発振せしめることによって、該延出端部を該接続基部に対して下方に変位せしめると共に該被係止手段に係止せしめる、請求項1又は2記載の蓋装着方法。   The lower end of the ultrasonic welding machine is lowered with respect to the connection base by bringing the lower end of the cylindrical horn into contact with the radially outer side of the lid flange to lower the horn and oscillate ultrasonic waves. The lid mounting method according to claim 1 or 2, wherein the lid is displaced to the locked means and locked to the locked means. 該蓋フランジの該延出片の各々の該延出端部の半径方向幅は該第一の周方向延出部、該接続部及び該第二の周方向延出部の幅よりも大きい、請求項1から3までのいずれかに記載の蓋装着方法。   A radial width of the extending end portion of each of the extending pieces of the lid flange is larger than widths of the first circumferential extending portion, the connecting portion, and the second circumferential extending portion, The lid mounting method according to any one of claims 1 to 3. 該蓋フランジの該延出片の各々の該第一の周方向延出部は該容器本体の該口頸部を開封する際の該蓋の回転方向である開方向に延出し、該第二の周方向延出部は該延出端部まで該容器本体の該口頸部に該蓋を装着して口頸部を密封する際の該蓋の回転方向である閉方向に延出する、請求項1から4までのいずれかに記載の蓋装着方法。   The first circumferentially extending portion of each of the extending pieces of the lid flange extends in an opening direction that is a rotation direction of the lid when the mouth neck of the container body is opened, and the second The circumferentially extending portion extends to the extending end in the closing direction, which is the rotational direction of the lid when the lid is attached to the mouth and neck of the container body and the mouth and neck are sealed. The lid mounting method according to any one of claims 1 to 4. 該蓋フランジの該易破断接続片は該延出片の該延出端部と隣接する該延出片の該接続部とを接続している、請求項5記載の蓋装着方法。   The lid mounting method according to claim 5, wherein the easily breakable connecting piece of the lid flange connects the extending end portion of the extending piece and the connecting portion of the extending piece adjacent thereto. 該容器本体は該蓋を形成している合成樹脂とは異なった合成樹脂から形成されている、請求項1から6までのいずれかに記載の蓋装着方法。   The lid mounting method according to any one of claims 1 to 6, wherein the container body is made of a synthetic resin different from the synthetic resin forming the lid.
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