JP6316570B2 - Container mouth and container with cap - Google Patents
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- JP6316570B2 JP6316570B2 JP2013228964A JP2013228964A JP6316570B2 JP 6316570 B2 JP6316570 B2 JP 6316570B2 JP 2013228964 A JP2013228964 A JP 2013228964A JP 2013228964 A JP2013228964 A JP 2013228964A JP 6316570 B2 JP6316570 B2 JP 6316570B2
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Description
本発明は、タンパーエビデントバンドを有するキャップが螺合する容器口部に関する。 The present invention relates to a container mouth portion is a cap having a tamper evident band is screwed.
一般的に、内容物が充填され容器口部をキャップで密封する容器において、容器口部に設けられた雄ネジ部に雌ネジ部を有するキャップを螺合することで高い密封性を確保する容器密封構造を採用したものが周知である。
また、使用者により一旦開封されたことを明確に判別可能とするため、タンパーエビデントバンドを有するキャップを用いた容器密封構造が公知である。
公知のキャップは、例えば特許文献１に示すように、容器口部（５）の形状にあわせてほぼ円筒形状をしており、天面部（１）と天面部（１）の周縁部から垂下したスカート部（２）とから形成され、スカート部（２）の下側に環状切断面（３）を介し開封明示用のタンパーエビデントバンド（周状バンド４）が設けられている。
Generally, in a container that is filled with contents and seals the container mouth with a cap, a container that secures high sealing performance by screwing a cap having a female thread to a male thread provided in the container mouth What employ | adopted the sealing structure is known.
In addition, a container sealing structure using a cap having a tamper evident band is known in order to make it possible to clearly determine that the user has once opened it.
For example, as shown in Patent Document 1, the known cap has a substantially cylindrical shape according to the shape of the container mouth portion (5), and is suspended from the peripheral portions of the top surface portion (1) and the top surface portion (1). A tamper-evidence band (circumferential band 4) is provided on the lower side of the skirt portion (2) via an annular cut surface (3).
キャップのスカート部（２）の下端とタンパーエビデントバンド（周状バンド４）とは環状切断面（３）により分割されていると共に、切断面（３）の内周よりも内側に位置するように周状に分布して配置されたブリッジ（３１）により連結されている。
タンパーエビデントバンド（周状バンド４）は、容器口部への係止のために、径内方向且つ斜め方向に延びる片状のフィン（４１）を多数周状に配置して備えている。
閉栓に際しては、容器口部の上方からキャップを嵌合して閉栓方向に回転させると、容器口部の雄ネジ部（ネジ５３）とスカート部内面の雌ネジ部（ネジ２２）とが係合して、閉栓が進行する。
The lower end of the cap skirt part (2) and the tamper evident band (circumferential band 4) are divided by the annular cut surface (3) and are located inside the inner periphery of the cut surface (3). Are connected by bridges (31) arranged in a circumferentially distributed manner.
The tamper evident band (circumferential band 4) is provided with a large number of pieces of fins (41) extending radially inward and obliquely for locking to the container mouth.
When closing the cap, when the cap is fitted from above the container mouth and rotated in the closing direction, the male thread (screw 53) of the container mouth and the female thread (screw 22) of the inner surface of the skirt are engaged. Then, the plugging proceeds.
この時、タンパーエビデントバンド（周状バンド４）のフィン（４１）の延びる方向と閉栓方向とが一致しているため、フィン（４１）は容器口部のビード部（あご部５４）を乗り越えてその下部に達し、閉栓が完了した際にフィン（４１）によるタンパーエビデントバンド（周状バンド４）の保持が確実に行われる。
キャップの開栓時においては、天面部（１）およびスカート部（２）のみが開栓方向に回転しながら上昇するのに対し、フィン（４１）がビード部（あご部５４）を乗り越え不能で回転も困難となるため、タンパーエビデントバンド（周状バンド４）がビードリング部（あご部５４）の下に位置したまま、剪断力によりブリッジ（３１）が破断する。
この破断により、タンパーエビデントバンド（周状バンド４）が分離して開栓が行われ、使用者により一旦開封されたことが明確に判別可能となる。
At this time, since the extending direction of the fin (41) of the tamper evident band (circumferential band 4) coincides with the closing direction, the fin (41) gets over the bead portion (chin portion 54) of the container mouth portion. The tamper-evidence band (circumferential band 4) is reliably held by the fin (41) when reaching the lower part of the lever and the closure is completed.
When the cap is opened, only the top surface portion (1) and the skirt portion (2) rise while rotating in the opening direction, whereas the fin (41) cannot get over the bead portion (chin portion 54). Since rotation is also difficult, the bridge (31) is broken by the shearing force while the tamper evident band (circumferential band 4) is positioned under the bead ring portion (chin portion 54).
By this breakage, the tamper evidence band (circumferential band 4) is separated and opened, and it can be clearly determined that the user has once opened the tamper evident band.
内容物の充填後の閉栓は、例えば特許文献２に示すように、容器が連続的に送られている状態で高速に自動的に行われる。
上記特許文献１に記載されたような公知のキャップを、特許文献２に記載されたように高速に自動的に行う場合、キャップが容器口部に対して傾斜して供給され、そのままキャップが傾斜したまま容器口部の雄ネジ部とスカート部内面の雌ネジ部とが係合を開始し、閉栓完了直前まで傾斜したままの姿勢で閉栓方向に回転することがある。
この現象を少なくするためには、処理速度を落としキャップの供給の正確性を向上させることも考えられるが、強いトルクでキャップを回転させることにより、閉栓完了直前に雄ネジ部と雌ネジ部のネジ山が弾性変形により乗り越えて、最終的にキャップが正常な姿勢となって閉栓完了することから、高速性を重視して傾斜したままの姿勢で閉栓を行なっていた。
Closing after filling the contents is automatically performed at a high speed in a state where the containers are continuously fed, as shown in Patent Document 2, for example.
When a known cap as described in Patent Document 1 is automatically performed at a high speed as described in Patent Document 2, the cap is supplied while being inclined with respect to the container mouth, and the cap is inclined as it is. The male screw part of the container mouth part and the female screw part of the inner surface of the skirt part start to be engaged with each other, and may rotate in the closing direction in an inclined posture until just before closing.
In order to reduce this phenomenon, it may be possible to improve the accuracy of cap supply by reducing the processing speed, but by rotating the cap with a strong torque, the male screw part and female screw part immediately before the closure is completed. Since the screw thread overcame due to elastic deformation and finally the cap is in a normal posture and the closure is completed, the closure is performed in an inclined posture with an emphasis on high speed.
しかしながら、図５に示すように、キャップ１２０が傾斜したまま容器口部５００の雄ネジ部５１０とスカート部内面の雌ネジ部１３０とが係合を開始しそのままの姿勢で閉栓方向に回転した際に、傾斜方向によっては、タンパーエビデントバンド１２１のブリッジ１２３が破断する事態が発生することがあった。
特に、内容物が果汁入り炭酸等の高い内圧を有するもので、密封後の殺菌等の熱処理工程でさらに内圧が上昇するものにおいては、キャップ１２０の浮き上がりを防止し密封性を向上させるために、キャップ１２０の内周面の雌ネジ部１３０のネジ山１３１を長く設けることが考えられるが、その際に、ブリッジ１２３の破断が多く発生した。
However, as shown in FIG. 5, when the cap 120 is tilted, the male threaded portion 510 of the container mouth portion 500 and the female threaded portion 130 on the inner surface of the skirt portion start to engage with each other and rotate in the closing direction as it is. In addition, depending on the inclination direction, the bridge 123 of the tamper evident band 121 may break.
In particular, in the case where the content has a high internal pressure such as carbonated fruit juice, and the internal pressure further increases in the heat treatment step such as sterilization after sealing, in order to prevent the cap 120 from rising and improve the sealing performance, Although it is conceivable to provide a long thread 131 of the internal thread portion 130 on the inner peripheral surface of the cap 120, many breaks of the bridge 123 occurred at that time.
本発明者らは、この現象を実験により解析した結果、図６乃至図８に示すように、キャップ１２０が傾斜した姿勢で閉栓方向に回転した際に、タンパーエビデントバンド１２１の内周側に設けられたフィン１２２は、キャップ１２０と同様に、容器口部５００の雄ネジ部５１０のネジ山５１１を下方から上方に向かって横切る軌跡ＢＫを描こうとし、雄ネジ部５１０のネジ山５１１を乗り越えようとすることを確認した。そして、その際にキャップ１２０が斜めに傾いているため、図８に示すように、フィン１２２の内周側先端部は容器口部５００の−４０°位置から、容器口部５００から離れると共に立ち上がってしまい、８０°位置までの間にネジ山５１１を乗り越えることができず、フィン１２２がネジ山５１１に沿って図示の軌跡ＦＫのように下方に引っ張られてブリッジ１２３が破断することを確認した。 As a result of analyzing this phenomenon by experiment, the present inventors have found that when the cap 120 is rotated in the closing direction in an inclined posture, as shown in FIGS. As with the cap 120, the provided fin 122 tries to draw a trajectory BK that crosses the thread 511 of the male screw part 510 of the container mouth part 500 from below to above, and overcomes the screw thread 511 of the male screw part 510. Confirmed to try. At that time, since the cap 120 is inclined obliquely, as shown in FIG. 8, the tip of the inner peripheral side of the fin 122 rises away from the container mouth portion 500 from the −40 ° position of the container mouth portion 500. As a result, it was confirmed that the screw thread 511 could not be climbed up to the 80 ° position, and the fins 122 were pulled down along the thread thread 511 as shown in the locus FK to break the bridge 123. .
また、図９に示すように、容器口部５００の雄ネジ部５１０にキャップ１２０内周面の雌ネジ部１３０の終端１３２が接触したとき、１８０°反対側の雄ネジ部５１０が、容器口部５００の雄ネジ部５１０が接触するキャップ内周面の下端部１２４よりキャップ内に入るため、容器口部５００の雄ネジ部５１０とスカート部内面の雌ネジ部１３０とが係合する際、キャップ１２０は傾斜することなく容器口部５００に係合される。
一方、前述したように、キャップ１２０内周面の雌ネジ部１３０のネジ山１３１のみを長くした場合、図１０に示すように、ネジ山１３１のフィン１２２側の終端１３２とフィン１２２との上下方向の間隔が短くなり、容器口部５００の雄ネジ部５１０にキャップ１２０内周面の雌ネジ部１３０の終端１３２が接触したとき、１８０°反対側にある雄ネジ部５１０が、容器口部５００の雄ネジ部５１０が接触するキャップ内周面の下端部１２４よりキャップ内に入らない。
Further, as shown in FIG. 9, when the end 132 of the female screw portion 130 on the inner peripheral surface of the cap 120 comes into contact with the male screw portion 510 of the container mouth portion 500, the male screw portion 510 on the opposite side of 180 ° Since the male screw portion 510 of the portion 500 enters the cap from the lower end portion 124 of the inner peripheral surface of the cap with which the male screw portion 510 comes into contact, when the male screw portion 510 of the container mouth portion 500 and the female screw portion 130 on the inner surface of the skirt portion are engaged, The cap 120 is engaged with the container mouth portion 500 without being inclined.
On the other hand, as described above, when only the thread 131 of the female thread portion 130 on the inner peripheral surface of the cap 120 is elongated, as shown in FIG. When the direction interval is shortened and the end 132 of the female screw portion 130 on the inner peripheral surface of the cap 120 contacts the male screw portion 510 of the container mouth portion 500, the male screw portion 510 on the opposite side of 180 ° is It does not enter the cap from the lower end portion 124 of the inner peripheral surface of the cap with which the male threaded portion 510 of 500 contacts.
そのため、容器口部５００の雄ネジ部５１０とスカート部内面の雌ネジ部１３０とが嵌合の浅い位置で係合し、キャップ１２０が傾斜したまま係合を開始する可能性が高くなる。
また、傾斜したまま係合を開始した場合、図６、図７に示すように、フィン１２２が、本来回転軌跡ＢＫを描くところ、雄ネジ部５１０のネジ山５１１を乗り越えることができず、実際には軌跡ＦＫをたどる可能性が高まり、ブリッジ１２３が破断する事態も増加することも確認した。
Therefore, the male screw portion 510 of the container mouth portion 500 and the female screw portion 130 on the inner surface of the skirt portion are engaged at a shallow fitting position, and the possibility of starting the engagement with the cap 120 inclined is increased.
Further, when the engagement is started while being inclined, as shown in FIGS. 6 and 7, the fin 122 originally draws the rotation locus BK, but cannot get over the screw thread 511 of the male screw portion 510. It has also been confirmed that the possibility of following the trajectory FK increases and the situation where the bridge 123 breaks also increases.
本発明は、前述の問題を解決するものであって、簡単な構造で、閉栓時にキャップが傾斜したまま係合を開始してもタンパーエビデントバンドのブリッジの破断が防止され、処理速度を落としてキャップの供給の正確性を向上させることなく、高速で効率よくキャップの閉栓を行うことが可能な容器口部を提供することを目的とする。 The present invention solves the above-mentioned problems, and has a simple structure. Even when engagement is started while the cap is tilted when the cap is closed, the tamper evident band bridge is prevented from being broken, and the processing speed is reduced. It is an object of the present invention to provide a container mouth portion capable of closing a cap efficiently at high speed without improving the accuracy of supply of the cap.
本請求項１に係る発明によれば、タンパーエビデントバンドを有し、その内周面には、係止手段であるフィンを備えるキャップが螺合する容器口部であって、前記容器口部は雄ネジ部と係止リングであるビード部を備え、前記雄ネジ部は、ネジ山の始端の角度位置を０°とした時、始端から２周したネジ山の０°位置から少なくとも−４０°〜８０°の範囲に、前記キャップが斜めに閉栓された際、前記フィンがネジ山の下方から上方に通過可能な切り欠き部を有することにより、前記課題を解決するものである。ここで、角度は容器口部の周方向の角度であり、ネジ山始端から終端へ向かう方向をプラスとする。 According to the first aspect of the present invention, a container mouth portion having a tamper evident band and having a cap provided with a fin serving as a locking means is screwed to the inner peripheral surface of the container mouth portion. Comprises a bead portion which is a male screw portion and a locking ring, and the male screw portion is at least −40 from the 0 ° position of the screw thread that makes two rounds from the start end when the angular position of the start end of the screw thread is 0 °. When the cap is obliquely closed in the range of 80 ° to 80 °, the fin has a cutout portion that can pass upward from below the screw thread to solve the above problem. Here, the angle is an angle in the circumferential direction of the container mouth, and the direction from the screw thread start end to the terminal end is positive.
また、前記切り欠き部が、前記雄ネジ部のネジ山の始端の角度位置を０°とした時、始端から２周したネジ山の０°位置から−４０°〜８０°の範囲にのみ設けられている。
本請求項２に係る発明によれば、タンパーエビデントバンドを有し、その内周面には、係止手段であるフィンを備えるキャップが螺合する容器口部であって、前記容器口部は雄ネジ部と係止リングであるビード部を備え、前記雄ネジ部は、ネジ山の始端の角度位置を０°とした時、始端から２周したネジ山の０°位置から少なくとも−４０°〜８０°の範囲に、前記キャップが斜めに閉栓された際、前記フィンがネジ山の下方から上方に通過可能な切り欠き部を有し、前記切り欠き部が、前記雄ネジ部のネジ山の高さ方向の一部のみを切り欠いたものである。
Further, the notch portion is provided only in the range of −40 ° to 80 ° from the 0 ° position of the screw thread that makes two turns from the start end when the angular position of the start end of the thread of the male screw portion is 0 °. It has been.
According to the second aspect of the present invention, there is a container mouth portion having a tamper evident band, and having an inner peripheral surface screwed with a cap provided with a fin as a locking means, the container mouth portion. Comprises a bead portion which is a male screw portion and a locking ring, and the male screw portion is at least −40 from the 0 ° position of the screw thread that makes two rounds from the start end when the angular position of the start end of the screw thread is 0 °. When the cap is obliquely closed in the range of 80 ° to 80 °, the fin has a cutout portion that can pass upward from below the screw thread, and the cutout portion is a screw thread of the male screw portion. Only a part in the height direction is cut out .
本請求項１に係る発明の容器口部によれば、閉栓時にキャップが傾斜したまま係合を開始しキャップの回転軌跡が雄ネジ部のネジ山を横切るとともに、フィンがネジ山に沿ってやや下方に引っ張られたとしても、切り欠き部を下方から上方に通過するので、フィンが下方に強く引っ張られることを防ぐことができる。そのため、タンパーエビデントバンドのブリッジが破断することを防止し、処理速度を落としてキャップの供給の正確性を向上させることなく高速で効率よくキャップの閉栓を行うことができる。 According to the container mouth portion of the invention according to claim 1, the cap starts to be engaged while the cap is inclined when the cap is closed, and the rotation trajectory of the cap crosses the thread of the male thread portion, and the fin is slightly along the thread. Even if it is pulled downward, it passes through the notch from the bottom to the top, so that it is possible to prevent the fin from being pulled strongly downward. Therefore, the bridge of the tamper-evident band can be prevented from breaking, and the cap can be closed efficiently at high speed without reducing the processing speed and improving the accuracy of supplying the cap.
また、タンパーエビデントバンドのブリッジが破断することを防止するとともに、ネジ山の切り欠き部を少なくすることで容器口部の雄ネジ部とスカート部内面の雌ネジ部との接触長さを長く保つことが可能となり、内圧が上昇するものにおいてもキャップの浮き上がりを防止し密封性を向上することができる。
請求項２に係る発明の容器口部よれば、切り欠き部においても雄ネジ部と雌ネジ部のネジ山が隙間無く接触することが可能となり、さらに密封性を向上することができる。
In addition, the tamper-evident band bridge is prevented from breaking, and the contact length between the male threaded portion of the container mouth and the female threaded portion of the inner surface of the skirt is increased by reducing the thread notch. The cap can be prevented from rising even when the internal pressure is increased, and the sealing performance can be improved.
According to the container mouth portion of the invention according to claim 2, it is possible to contact the screw threads of the male screw portion and the female screw portion without any gap even in the notch portion, and further improve the sealing performance.
本発明の容器口部および容器密封構造について、図面に基づいて説明する。
まず、本発明の一実施形態である容器口部１００は、図１に示すように、雄ネジ部１１０と係止リングであるビード部１０１を備えている。
容器口部１００の雄ネジ部１１０は、ネジ山１１１の始端１１２から２周した０°位置から３５°の角度位置にのみ切り欠き部１１３を有しており、即ち、ネジ山１１１の始端１１２から２周したネジ山の０°位置から−４０°〜８０°の範囲にのみ前記切り欠き部１１３を有し、図２に示すように、キャップ１２０が斜めに閉栓された際にフィン１２２がネジ山１１１の下方から上方に通過可能に構成されている。
なお、前述した切り欠き部１１３は、雄ネジ部１１０のネジ山１１１の始端から２周目の０°位置から−４０°〜８０°の範囲にのみ設けているが、前記範囲外の雄ネジ部１１０のネジ山１１１の始端１１２から終端の適宜位置に増設しても良い。
The container mouth part and container sealing structure of this invention are demonstrated based on drawing.
First, the container mouth part 100 which is one Embodiment of this invention is equipped with the bead part 101 which is the external thread part 110 and a locking ring, as shown in FIG.
The male threaded portion 110 of the container mouth 100 has a notch 113 only at an angular position of 35 ° from 0 ° position that is two rounds from the starting end 112 of the thread 111, that is, the starting end 112 of the thread 111. The notch 113 is provided only in the range of −40 ° to 80 ° from the 0 ° position of the screw thread that makes two rounds from the end. As shown in FIG. 2, when the cap 120 is obliquely closed, the fin 122 The thread 111 is configured to be able to pass upward from below.
The notch 113 described above is provided only in the range of −40 ° to 80 ° from the 0 ° position of the second turn from the start end of the thread 111 of the male screw portion 110. The thread 110 of the part 110 may be added from the start end 112 to an appropriate end position.
このように構成されていることで、キャップ１２０が傾斜した姿勢で閉栓方向に回転した際に、キャップ１２０は、容器口部１００の雄ネジ部１１０のネジ山１１１を下方から上方に向かって軌跡ＢＫを描き、雄ネジ部１１０のネジ山１１１を横切る。そして、タンパーエビデントバンド１２１の内周側に設けられたフィン１２２の内周側先端部が、キャップ１２０とともにネジ山１１１を乗り越えようとしながらも、ネジ山１１１に沿って図示の軌跡ＦＫのようにやや下方に引っ張られる。しかし、切り欠き部１１３に達したフィン１２２は、順次、ネジ山１１１の上方へ切り欠き部１１３を通過するため、ブリッジ１２３の破断には至らない。 With this configuration, when the cap 120 rotates in the closing direction in an inclined posture, the cap 120 traces the thread 111 of the male threaded portion 110 of the container mouth portion 100 from below to above. Draw BK and cross the thread 111 of the male thread 110. And while the tip of the inner peripheral side of the fin 122 provided on the inner peripheral side of the tamper evident band 121 tries to get over the screw thread 111 together with the cap 120, the locus FK shown in FIG. Slightly pulled downward. However, since the fins 122 that have reached the notch 113 pass through the notch 113 sequentially above the thread 111, the bridge 123 does not break.
実験の結果、図４に示すようにキャップ１２０を従来の容器口部５００にのせると、キャップ１２０のフィン１２２は、ネジ山５１１の２周目の位置にくる。
そして、切り欠き部１１３を設けない場合、キャップ１２０が傾斜し、図５に示すような、雄ネジ部５１０のネジ山５１１の始端５１２の近傍位置にてキャップ１２０が最も高く持ち上がった状態で係合回転した際に、最もブリッジ１２３の破断が多く発生することが確認されている。
この場合、容器口部５００のネジ山５１１の始端５１２の角度位置を０°とした時、ネジ山５１１の始端から２周目の−４０°位置から、持ち上がったキャップ１２０のフィン１２２が容器口部５００から離れながら立ち上がるとともに、ネジ山５１１を横切り乗り越えようとする。
As a result of the experiment, when the cap 120 is placed on the conventional container opening 500 as shown in FIG. 4, the fin 122 of the cap 120 comes to the position of the second circumference of the screw thread 511.
If the notch 113 is not provided, the cap 120 is inclined, and the cap 120 is lifted to the highest position at a position near the start end 512 of the thread 511 of the male screw 510 as shown in FIG. It has been confirmed that the most breakage of the bridge 123 occurs during the combined rotation.
In this case, when the angular position of the start end 512 of the thread 511 of the container mouth portion 500 is 0 °, the fin 122 of the cap 120 lifted from the −40 ° position of the second turn from the start end of the thread 511 is the container mouth. While standing up away from the part 500, it tries to cross over the screw thread 511.
そして、フィン１２２がネジ山の８０°位置に近づくにつれ、フィン１２２は容器口部５００に近づくように抑えられ、ネジ山５１１を乗り越えるのがより難しくなる。そして、キャップ１２０の回転により本来フィン１２２が描く軌跡ＢＫとフィン１２２が実際に描く軌跡ＦＫが離れすぎて、フィン１２２を下方に引っ張る力が強くなり、ブリッジ１２３の破断が起きてしまう。
したがって、本発明では、容器口部１００における雄ネジ部１１０のネジ山１１１の始端１１２の角度位置を０°とした時、始端から２周したネジ山１１１の０°位置から−４０°〜８０°の範囲に切り欠き部１１３を設けることで、ブリッジ１２３が破断する前にフィン１２２がネジ山１１１の切り欠き部を通過し、ネジ山１１１の上方に達するため、破断が防止される。
Then, as the fin 122 approaches the 80 ° position of the thread, the fin 122 is restrained to approach the container mouth 500, making it more difficult to get over the thread 511. Then, the trajectory BK originally drawn by the fin 122 and the trajectory FK actually drawn by the fin 122 are separated too much by the rotation of the cap 120, and the force pulling the fin 122 downward becomes strong, and the bridge 123 breaks.
Therefore, in the present invention, when the angular position of the starting end 112 of the thread 111 of the male threaded portion 110 in the container mouth portion 100 is 0 °, −40 ° to 80 from the 0 ° position of the thread 111 that makes two turns from the starting end. By providing the notch portion 113 in the range of °, the fin 122 passes through the notch portion of the screw thread 111 before the bridge 123 breaks and reaches the upper portion of the screw thread 111, so that the breakage is prevented.
また、前述した切り欠き部１１３が始端から２周した雄ネジ部１１０のネジ山１１１の０°位置から−４０°より始端側に位置する場合、フィン１２２がネジ山１１１を乗り越えようとする位置より前にあるため、切り欠き部１１３を通過してネジ山１１１を乗り越えることができず、ブリッジ１２３の破断の発生が増加する。
さらに、前述した切り欠き部１１３が始端から２周したネジ山１１１の０°位置から８０°より終端側に位置する場合、フィン１２２が切り欠き部１１３を通過してネジ山１１１を乗る超える前にブリッジ１２３が破断してしまうケースが増加する。
Further, when the aforementioned notch 113 is positioned on the start end side from −40 ° from the 0 ° position of the thread 111 of the male thread portion 110 that has made two rounds from the start end, the position where the fin 122 attempts to get over the thread 111 Since it exists before, it cannot pass over the thread 111 through the notch part 113, and generation | occurrence | production of the fracture | rupture of the bridge | bridging 123 increases.
Further, when the above-described notch 113 is positioned on the terminal end side from 80 ° from the 0 ° position of the thread 111 that has made two rounds from the starting end, before the fin 122 passes through the notch 113 and rides on the thread 111. The number of cases in which the bridge 123 breaks increases.
雄ネジ部１１０のネジ山１１１に設ける切り欠き部１１３の幅や形状は、ネジ山１１１の始端１１２の角度位置を０°とした時、始端から２周したネジ山１１１の０°位置から−４０°〜８０°の範囲に、キャップ１２０が斜めに閉栓された際、フィン１２２がネジ山１１１の下方から上方に通過可能であれば、どのようなものであってもよい。
図３に示す容器口部１００ａ１、１００ａ２は、上記実施形態と同様に切り欠き部１１３をネジ山１１１の始端から２周目の０°位置から３５°の角度位置に、容器口部１００ｂ１、１００ｂ２は、切り欠き部１１３をネジ山１１１の２周目の０°の角度位置に、容器口部１００ｃ１、１００ｃ２は、ネジ山の２周目の０°位置から−３５°の角度位置にそれぞれ設けたものであり、いずれもネジ山の始端の角度位置を０°とした時、始端から２周したネジ山の０°位置から−４０°〜８０°の範囲に設けたものである。
The width and shape of the notch 113 provided in the thread 111 of the male thread 110 is such that the angle 111 of the start end 112 of the thread 111 is 0 ° from the 0 ° position of the thread 111 that makes two turns from the start end. As long as the cap 120 is obliquely closed in the range of 40 ° to 80 °, the fin 122 may be anything as long as it can pass upward from below the thread 111.
The container mouth portions 100a1 and 100a2 shown in FIG. 3 have the notch portion 113 at an angular position of 35 ° from the 0 ° position on the second turn from the start end of the thread 111, as in the above embodiment. The notch 113 is provided at an angular position of 0 ° on the second round of the screw thread 111, and the container mouth portions 100c1 and 100c2 are provided at an angular position of −35 ° from the 0 ° position on the second round of the screw thread. Both are provided in the range of −40 ° to 80 ° from the 0 ° position of the screw thread that makes two rounds from the starting end when the angular position of the starting end of the screw thread is 0 °.
また、図３の容器口部１００ａ１、１００ｂ１、１００ｃ１の切り欠き部１１３は、例えば、幅１８°の範囲でネジ山１１１の６０〜７０％を切り欠く形状であり、切り欠き部１１３をネジ山１１１の高さ方向の一部のみを切り欠いた形状としており、このような切り欠き部とすることで、切り欠き部１１３においても容器口部１００の雄ネジ部１１０と雌ネジ部１３０のネジ山１３１が隙間無く接触することが可能となり、密封性を向上することができる。
また、図３の容器口部１００ａ２、１００ｂ２、１００ｃ２の切り欠き部１１３は、例えば、幅３９°の範囲で切り欠き部のネジ山方向の両端部を高さが徐々に低くなる傾斜形状でネジ山１１１の一部を全て切り欠く形状としており、このような切り欠き部１１３とすることで、フィンが切り欠き部を円滑に通過することが可能となり、より確実にブリッジ１２３の破断を防止することが可能となる。
Further, the notch 113 of the container mouth portions 100a1, 100b1, and 100c1 in FIG. 3 has a shape that cuts out 60 to 70% of the thread 111 within a range of 18 ° in width, for example. Only a part in the height direction of 111 is cut out, and by forming such a cut-out portion, the male screw portion 110 of the container mouth portion 100 and the screw of the female screw portion 130 are also formed in the cut-out portion 113. The mountain 131 can be contacted without a gap, and the sealing performance can be improved.
Further, the notches 113 of the container mouth portions 100a2, 100b2, and 100c2 in FIG. 3 are, for example, screwed in an inclined shape in which the heights of both ends in the thread direction of the notches are gradually reduced within a range of 39 ° in width. A part of the mountain 111 is cut out, and by using such a cutout portion 113, the fin can smoothly pass through the cutout portion, and the bridge 123 can be more reliably prevented from breaking. It becomes possible.
また、図１０に示すように、キャップ１２０内周面の雌ネジ部１３０のネジ山１３１のみを長くすると、前記ネジ山１３１の終端１３２とフィン１２２との上下方向の間隔が短くなる。
このようなキャップ１２０を有するキャップ付容器において、ネジ山１３１の終端１３２からキャップ内周面の下端部１２４の間隔Ａが、容器口部５００に設けた雄ネジ部５１０のネジ山５１１のピッチ幅Ｐの２分の１よりも短い場合、前記雄ネジ部５１０に雌ネジ部１３０の終端１３２が接触したとき、１８０°反対側にある雄ネジ部５１０は、雄ネジ部終端１３２よりピッチ幅Ｐの２分の１だけ下方にあるため、容器口部５００の雄ネジ部５１０が接触するキャップ内周面の下端部１２４よりキャップ内に入らない。そのため、図５に示すように、キャップ１２０は傾斜して容器口部５００に係合してしまう可能性が高い。
よって、本発明では、容器口部１００の雄ネジ部１１０のネジ山１１１に切り欠き部１１３を設けることにより、キャップ１００が傾斜していたとしても、キャップ１２０の回転軌跡が雄ネジ部１１０のネジ山１１１を横切るとともに、フィン１２２も切り欠き部１１３を下方から上方に通過するので、フィン１２２が下方に強く引っ張られることがなく、ブリッジ１２３の破断を防止することが可能となる。
As shown in FIG. 10, when only the thread 131 of the female thread portion 130 on the inner peripheral surface of the cap 120 is lengthened, the vertical distance between the terminal end 132 of the thread 131 and the fin 122 is shortened.
In a container with a cap having such a cap 120, the distance A between the end 132 of the thread 131 and the lower end 124 of the inner peripheral surface of the cap is the pitch width of the thread 511 of the male thread 510 provided in the container mouth 500. When the length is shorter than half of P, when the end 132 of the female thread 130 comes into contact with the male thread 510, the male thread 510 on the opposite side of 180 ° has a pitch width P greater than that of the male thread end 132. Therefore, the male threaded portion 510 of the container mouth portion 500 does not enter the cap from the lower end portion 124 of the inner peripheral surface of the cap. Therefore, as shown in FIG. 5, there is a high possibility that the cap 120 is inclined and engaged with the container mouth portion 500.
Therefore, in the present invention, by providing the notch 113 in the thread 111 of the male threaded part 110 of the container mouth part 100, even if the cap 100 is inclined, the rotation trajectory of the cap 120 is While crossing the thread 111 and the fin 122 also passes through the notch 113 upward from below, the fin 122 is not pulled strongly downward, and the breakage of the bridge 123 can be prevented.
本発明の容器口部および容器密封構造は、果汁入り炭酸等の高い内圧を有し、かつ、密封後の殺菌等の熱処理工程でさらに内圧が上昇する飲料等を、ＰＥＴ等の容器に収容する際の容器口部および容器密封構造に採用するのに好適であるが、いかなる内容物であっても、いかなる材質、形状の容器であっても適用可能である。 The container mouth portion and the container sealing structure of the present invention accommodate beverages or the like that have a high internal pressure such as carbonated fruit juice and whose internal pressure further increases in a heat treatment step such as sterilization after sealing in a container such as PET. It is suitable for use in the container mouth portion and the container sealing structure at the time, but any contents and containers of any material and shape are applicable.
１００、５００ ・・・ 容器口部
１０１、５０１ ・・・ ビード部
１１０、５１０ ・・・ 雄ネジ部
１１１、５１１ ・・・ ネジ山（雄ネジ部の）
１１２、５１２ ・・・ 始端（雄ネジ部の）
１１３ ・・・ 切り欠き部
１２０ ・・・ キャップ
１２１ ・・・ タンパーエビデントバンド
１２２ ・・・ フィン
１２３ ・・・ ブリッジ
１２４ ・・・ キャップ内周面の下端部
１３０ ・・・ 雌ネジ部
１３１ ・・・ ネジ山（雌ネジ部の）
１３２ ・・・ 終端（雌ネジ部の）
ＢＫ ・・・ キャップが傾斜した際のフィンの回転軌跡
ＦＫ ・・・ フィンの実際の軌跡
100, 500 ... Container mouth part 101, 501 ... Bead part 110, 510 ... Male thread part 111, 511 ... Screw thread (of male thread part)
112, 512 ... start end (of external thread)
113 ... Notch part 120 ... Cap 121 ... Tamper evident band 122 ... Fin 123 ... Bridge 124 ... Lower end part 130 of cap inner peripheral surface ... Female thread part 131 .. Screw thread (for female thread)
132 ・ ・ ・ End (of female thread)
BK: Fin rotation trajectory when the cap is tilted FK: Fin actual trajectory
Claims (2)
前記容器口部は雄ネジ部と係止リングであるビード部を備え、
前記雄ネジ部は、前記キャップが斜めに閉栓された際、前記フィンがネジ山の下方から上方に通過可能な切り欠き部を有し、
前記切り欠き部が、前記雄ネジ部のネジ山の始端の角度位置を０°とした時、始端から２周したネジ山の０°位置から−４０°〜８０°の範囲にのみ設けられていることを特徴とする容器口部。 A container mouth portion having a tamper-evident band, and having a cap provided with a fin serving as a locking means on its inner peripheral surface,
The container mouth portion includes a male screw portion and a bead portion that is a locking ring,
The male threaded portion, when the pre-Symbol cap is stoppered obliquely, the fins have a cutout portion can pass from the bottom to the top of the thread,
The notch portion is provided only in the range of −40 ° to 80 ° from the 0 ° position of the thread that has made two rounds from the start end when the angular position of the start end of the thread of the male screw portion is 0 °. the container opening, characterized in that there.
前記容器口部は雄ネジ部と係止リングであるビード部を備え、
前記雄ネジ部は、前記キャップが斜めに閉栓された際、前記フィンがネジ山の下方から上方に通過可能な切り欠き部を有し、
前記切り欠き部が、前記雄ネジ部のネジ山の高さ方向の一部のみを切り欠いたものであることを特徴とする容器口部。 A container mouth portion having a tamper-evident band, and having a cap provided with a fin serving as a locking means on its inner peripheral surface,
The container mouth portion includes a male screw portion and a bead portion that is a locking ring,
The male screw portion has a cutout portion through which the fin can pass upward from below the screw thread when the cap is obliquely closed.
The notch is, the container mouth you characterized in that the cut away only part of the height direction of the thread of the male threaded portion.
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| JPS5681050U (en) * | 1979-11-20 | 1981-07-01 | ||
| JPH06183449A (en) * | 1992-10-19 | 1994-07-05 | Suzuno Kasei Kk | Screw cap with loosening stopper and manufacture of the same |
| JP2000335613A (en) * | 1999-06-02 | 2000-12-05 | Hokkai Can Co Ltd | Container having plastic cap |
| JP2001233364A (en) * | 2000-02-21 | 2001-08-28 | Shirouma Science Kk | Tamper-evident cap device |
| JP4866018B2 (en) * | 2005-04-28 | 2012-02-01 | 日本クラウンコルク株式会社 | Container mouth |
| US7735664B1 (en) * | 2006-04-18 | 2010-06-15 | Portola Packaging, Inc. | Tapered thread structure |
| JP2009102074A (en) * | 2008-11-26 | 2009-05-14 | Japan Crown Cork Co Ltd | Cleaning method between container body and container lid |
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