JP2005313906A - Resin cap - Google Patents

Resin cap Download PDF

Info

Publication number
JP2005313906A
JP2005313906A JP2004130875A JP2004130875A JP2005313906A JP 2005313906 A JP2005313906 A JP 2005313906A JP 2004130875 A JP2004130875 A JP 2004130875A JP 2004130875 A JP2004130875 A JP 2004130875A JP 2005313906 A JP2005313906 A JP 2005313906A
Authority
JP
Japan
Prior art keywords
cap
skirt
stretchable
bay
resin cap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2004130875A
Other languages
Japanese (ja)
Other versions
JP4042135B2 (en
Inventor
Koichi Igari
耕一 猪狩
Masashi Mitsumoto
政司 三本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Kogei Kogyo Co Ltd
Original Assignee
Toyo Kogei Kogyo Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Kogei Kogyo Co Ltd filed Critical Toyo Kogei Kogyo Co Ltd
Priority to JP2004130875A priority Critical patent/JP4042135B2/en
Publication of JP2005313906A publication Critical patent/JP2005313906A/en
Application granted granted Critical
Publication of JP4042135B2 publication Critical patent/JP4042135B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Closures For Containers (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin cap which can be opened by lifting with the fingers, is superior in plugging, sealing, and unsealing, and has a practical resealing function. <P>SOLUTION: The resin cap has locking projection 21, and expanding/contracting curved parts 23, each having a plan section of almost curved shape and curving outwardly of a skirt 20, are formed on a part of the locking projection 21. The resin cap has a uniform wall thickness in the part ranging from the skirt 20 to the expanding/contracting curved parts 23. Each expanding/contracting curved part 23 is of an almost triangular shape in a front view, and has a curved part that becomes wider as the curved part 23 gets closer to the lower end of the skirt 20. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、主に、牛乳ビンのような広口ビンの施蓋に好適な樹脂製キャップに係り、打栓性、密封性、開栓性、再シール性に優れた樹脂製キャップに関する。   The present invention mainly relates to a resin cap suitable for covering a wide-mouth bottle such as a milk bottle, and more particularly to a resin cap excellent in stoppering performance, sealing performance, opening performance, and resealability.

牛乳ビン等を施蓋する合成樹脂の蓋体として、特許文献1に記載の樹脂製キャップが知られている。このキャップは、容器口部の内壁に嵌合する密封係合部、及び頂板部の周縁から下方に向かって突出するように設けられた環状係合部を有し、この環状係合部には、容器口部の外側に係合する突条、及び開栓用タブの両側に破断可能な薄肉部が設けられたものである。そして、開栓用タブを引き上げ、薄肉部を破断することでキャップを取り外す構造の樹脂製キャップである。   A resin cap described in Patent Document 1 is known as a synthetic resin lid for covering a milk bottle or the like. The cap has a sealing engagement portion that fits into the inner wall of the container mouth portion, and an annular engagement portion that is provided so as to protrude downward from the peripheral edge of the top plate portion. Further, a protrusion that engages with the outside of the container mouth portion, and a thin-walled portion that can be broken on both sides of the opening tab are provided. And it is a resin-made cap of the structure which pulls up the tab for opening and removes a cap by fracture | rupturing a thin part.

前記特許文献1を改良した樹脂製キャップとして特許文献2に記載の樹脂製キャップが提案されている。この樹脂製キャップでは、薄肉部を破断せず、キャップを指で持ち上げるだけで開栓できるように設けている。すなわち、キャップと容器口部との密着性を高める為に、容器口部の外周部に係合する環状係合部を設け、更に、環状係合部に柔軟性を付与するために、容器口部の外周に沿って設けられた上部肉厚部や下部肉厚部よりも肉薄に形成する肉薄部を設けたものである。この肉薄部は、環状係合部の外面に窓状の凹部を周方向に複数個形成し、あるいは、環状係合部の下端部から上方に延びる縦スリット状に設けるものである。   A resin cap described in Patent Document 2 has been proposed as a resin cap improved from Patent Document 1. This resin cap is provided so that the thin-walled portion can be opened by simply lifting the cap with a finger without breaking the thin-walled portion. That is, in order to improve the adhesion between the cap and the container mouth portion, an annular engagement portion that engages with the outer peripheral portion of the container mouth portion is provided, and in addition, in order to provide flexibility to the annular engagement portion, the container mouth A thin portion that is formed thinner than the upper thick portion and the lower thick portion provided along the outer periphery of the portion is provided. The thin portion is formed by forming a plurality of window-shaped concave portions in the circumferential direction on the outer surface of the annular engagement portion, or by providing a vertical slit shape extending upward from the lower end portion of the annular engagement portion.

更に、前記特許文献2と同様に、キャップを指で持ち上げるだけで開栓できる樹脂製キャップが特許文献3及び特許文献4に記載されている。特許文献3に記載されているキャップは、複数の薄肉部が間隔をおいて外周壁内面に凹所を形成している。また、特許文献4に記載されたキャップは、インナーリングのつけ根部分の頂壁に肉薄部を設けたものである。   Further, similarly to Patent Document 2, Patent Documents 3 and 4 describe resin caps that can be opened simply by lifting the cap with a finger. In the cap described in Patent Document 3, a plurality of thin portions are spaced to form a recess on the inner surface of the outer peripheral wall. Moreover, the cap described in Patent Document 4 has a thin portion provided on the top wall of the base portion of the inner ring.

これら従来の樹脂製キャップは、いずれも牛乳ビン等の広口ビンを施蓋するキャップの開栓容易性や密封性、打栓性を向上させるべく創出されたものである。
実公昭47−13109号公報 特開2002−179107号公報 特開2001−240091号公報 特開2003−231537号公報
These conventional resin caps are all created to improve the ease of opening, sealing and plugging of caps that cover wide-mouth bottles such as milk bottles.
Japanese Utility Model Publication No. 47-13109 JP 2002-179107 A JP 2001-240091 A JP 2003-231537 A

薄肉部を切り裂いて樹脂製キャップを開栓する特許文献1に対し、特許文献2乃至特許文献4は、いずれも薄肉部の弾性変形を利用し、キャップを指で持ち上げるだけで開栓できる構成になっている。ところが、開栓容易性と密封性とは、相反する作用になるので、特許文献2乃至特許文献4の樹脂製キャップでは、密封性を高める為に夫々異なった工夫が成されている。   In contrast to Patent Document 1 in which the thin cap is cut and the resin cap is opened, Patent Documents 2 to 4 all utilize the elastic deformation of the thin portion and can be opened simply by lifting the cap with a finger. It has become. However, since the ease of opening and the sealing performance are contradictory to each other, the resin caps of Patent Documents 2 to 4 have different contrivances for improving the sealing performance.

すなわち、特許文献2では、密封性を高めるために、容器口部の外周部に係合する環状係合部を設けている。更に、開栓作業を容易にするために、この環状係合部に柔軟性を付与する肉薄部を設けている。したがって、キャップを開栓するまでは環状係合部が密封性を保っているが、キャップを開栓するときに、この肉薄部が変形を生じるまで強制的に開かれるので、肉薄部が元の形状に回復しない程度まで変形し、環状係合部の密封性は消失する。この結果、一旦開栓された後の環状係合部は、もはや打栓時の密封性能を保つことができなくなり、開栓したキャップを容器開口部に再シールすることは不可能であった。   That is, in patent document 2, in order to improve sealing performance, the annular engaging part engaged with the outer peripheral part of a container opening part is provided. Further, in order to facilitate the opening operation, a thin portion that provides flexibility to the annular engagement portion is provided. Therefore, the annular engaging portion keeps the sealing property until the cap is opened, but when the cap is opened, the thin portion is forcibly opened until the deformation occurs. The shape is deformed to such an extent that it does not recover, and the sealing property of the annular engagement portion is lost. As a result, the ring-shaped engagement portion once opened can no longer maintain the sealing performance at the time of stoppering, and it is impossible to reseal the opened cap to the container opening.

このような課題は特許文献3においても同様であり、特許文献3に記載された外周壁に形成した複数の薄肉部が変形することで、容易に開栓可能になっているが、開栓後の再シール機能を有するものではない。しかも、特許文献3において、密封性を高める手段は、瓶口部および蓋に、これらをひとまとめに被覆する熱収縮フィルム製カバーの構成に依存しているので、該熱収縮フィルム製カバーを除去した後は、密封性能を保持できるものではなかった。   Such a problem is the same in Patent Document 3, and a plurality of thin wall portions formed on the outer peripheral wall described in Patent Document 3 can be easily opened by being deformed. It does not have a re-seal function. Moreover, in Patent Document 3, the means for improving the sealing performance depends on the configuration of the heat-shrinkable film cover that covers the bottle mouth part and the lid together, so that the heat-shrinkable film cover is removed. After that, the sealing performance could not be maintained.

一方、特許文献4のキャップは、開栓を容易にするために、インナーリングのつけ根部分の頂壁に肉薄部を設けたことで、前記特許文献2及び特許文献3の肉薄部とは異なった作用を奏している。しかしながら、キャップの密封性を高めるために、瓶口部の外側面に圧接して瓶口部の係合凹部に係止する係止突起を備えているので、この係止突起を外し易くする工夫が必要になっている。このため、例えば開栓時に持ち上げる摘み部に対応する部分に係止突起を設けず、また、摘み部近傍の係止突起を小突起とするなど、係止突起をキャップの周囲に均一に配置しないことで、開栓し易い構造にしている。この結果、キャップの密封性を高める係止突起の係合力が小さくなり、しかも偏ってしまうので、係止突起の密封性能に課題を残すものとなっている。   On the other hand, the cap of Patent Document 4 is different from the thin parts of Patent Document 2 and Patent Document 3 by providing a thin portion on the top wall of the base portion of the inner ring in order to facilitate opening. Has an effect. However, in order to improve the sealing performance of the cap, since it is provided with a locking projection that presses against the outer surface of the bottle mouth portion and engages with the engagement recess of the bottle mouth portion, the device makes it easy to remove the locking projection. Is needed. For this reason, for example, the locking projection is not provided on the portion corresponding to the knob that is lifted when the cap is opened, and the locking projection in the vicinity of the knob is a small projection. Therefore, the structure is easy to open. As a result, the engaging force of the locking projection that enhances the sealing performance of the cap is reduced and biased, leaving a problem in the sealing performance of the locking projection.

また、特許文献4では、打栓強度を高めずに打栓できるようにするため、小突起状の係止突起をスカートの円周方向に等間隔に配置することも予定されている。ところが、係止突起を等間隔に配置した状態で開栓を容易にするには、スカートの変形を容易にする縦スコア(溝)をスカートに設ける必要があった。このような縦スコア(溝)は、前記特許文献2及び特許文献3における薄肉部と同じ構造となるため、キャップ開栓時に、この縦スコア(溝)が強制的に開かれ、スカートが元の形状に戻らなくなるまで変形するので、一度開栓したキャップを容器に再シールすることはできない構造になっていた。   Further, in Patent Document 4, in order to enable plugging without increasing the plugging strength, it is also planned to dispose small projection-like locking projections at equal intervals in the circumferential direction of the skirt. However, in order to facilitate the opening with the locking projections arranged at equal intervals, it is necessary to provide the skirt with a vertical score (groove) that facilitates deformation of the skirt. Since such a vertical score (groove) has the same structure as the thin wall portion in Patent Document 2 and Patent Document 3, when the cap is opened, the vertical score (groove) is forcibly opened, and the skirt is original. Since the cap is deformed until it does not return to its shape, the cap once opened cannot be resealed to the container.

前述の如く、キャップを指で持ち上げて開栓する従来の樹脂製キャップにあっては、開栓容易性と密封性とに夫々適応する相反する構成を採用していたので、各構成の作用効果を打ち消し合い、一度開栓したキャップの再シールができなくなるといった不都合があった。   As described above, in the conventional resin cap that lifts and opens the cap with a finger, the conflicting configurations adapted to the ease of opening and the sealing, respectively, are adopted. The caps that had been opened once could not be resealed.

このように、牛乳ビン等を施蓋する従来の樹脂製キャップにおいて、実用的な再シールは未だ困難な状況にあるが、紙製の牛乳パックでは、開口部の折り畳み構造を活かして実用的な再シールが可能になっている。また、ペットボトル等に使用されているキャップはネジ構造のため、実用的な再シールは極めて容易に行える。このような状況から、牛乳ビン等の広口ビンを施蓋する樹脂製キャップにおいても、実用的な再シールが可能なキャップの提供が強く望まれている。   In this way, practical resealing is still difficult in conventional resin caps that cover milk bottles, etc., but with paper milk packs, practical use of the folding structure of the opening is practical. Sealing is possible. Moreover, since the cap used for a PET bottle etc. is a screw structure, practical resealing can be performed very easily. Under such circumstances, it is strongly desired to provide a cap capable of practical resealing even in a resin cap that covers a wide-mouth bottle such as a milk bottle.

そこで本発明は上述の課題を解消すべく創出されたもので、指で持ち上げるだけで開栓可能な樹脂製キャップにおいて、打栓性、密封性、開栓性に優れ、特に、実用的な再シール機能を有する樹脂製キャップの提供を目的とするものである。   Therefore, the present invention was created to solve the above-mentioned problems. In a resin cap that can be opened simply by lifting it with a finger, it is excellent in stoppering performance, sealing performance, and opening performance. The object is to provide a resin cap having a sealing function.

本発明の第1の手段は、瓶口部Pの上部端面に圧接する天板10と、該天板10の下面に設けられ瓶口部Pの内周面に嵌合するインナーリング11と、前記天板10から延長形成されて瓶口部Pの外側面に圧着するスカート20と、該スカート20の下端部内面に設けられ、前記瓶口部Pの外側面に設けられた係合凹部に係止する係止突起21と、スカート20の外側面に突設され、栓開栓時に手指を係止せしめる係止片22とを有する樹脂製キャップにおいて、前記係止突起21の一部に、平断面略湾曲形状を成しスカート20外側に向けて湾出し、キャップ打栓時および開栓時に湾曲部分が強制的に拡開され、キャップ施蓋時に湾曲部分が収縮して前記係止突起21が前記係合凹部に係止するように設けた伸縮湾部23を有するものである。   The first means of the present invention includes a top plate 10 that is press-contacted to the upper end surface of the bottle mouth portion P, an inner ring 11 that is provided on the lower surface of the top plate 10 and is fitted to the inner peripheral surface of the bottle mouth portion P, A skirt 20 that extends from the top plate 10 and is crimped to the outer surface of the bottle mouth portion P, and an engagement recess provided on the inner surface of the lower end portion of the skirt 20 and provided on the outer surface of the bottle mouth portion P. In a resin cap having a locking projection 21 to be locked and a locking piece 22 protruding from the outer surface of the skirt 20 and locking a finger when the plug is opened, a part of the locking projection 21 is The flat cross section has a substantially curved shape and extends out toward the outside of the skirt 20, the curved portion is forcibly expanded when the cap is plugged and opened, and the curved portion contracts when the cap is covered, and the locking projection 21 Has a stretchable bay portion 23 provided so as to be locked in the engagement recess. .

第2の手段は、前記スカート20から前記伸縮湾部23に至る肉厚を略均一の肉厚に形成している。   In the second means, the thickness from the skirt 20 to the stretchable bay portion 23 is formed to a substantially uniform thickness.

第3の手段において、前記伸縮湾部23は、正面略三角形状を成し、前記スカート20の下端部に近くなるほど湾曲部分が広がるように形成する。   In the third means, the stretchable bay portion 23 has a substantially triangular shape in front, and is formed such that the curved portion is widened toward the lower end portion of the skirt 20.

第4の手段は、前記係止片22の中央からキャップの中心部に至る仮想線Xを中心線としたときに、前記伸縮湾部23を該中心線Xの左右対象位置に形成する。   A 4th means forms the said expansion-contraction bay part 23 in the right-and-left object position of this center line X when the imaginary line X from the center of the said locking piece 22 to the center part of a cap is made into a center line.

第5の手段は、前記係止片22を設けた位置を前部aとし、この対極を後部bとしたときに、前記伸縮湾部23を前部aに多く配置したことを課題解消のための手段とする。   In order to solve the problem, the fifth means is that when the position where the locking piece 22 is provided is a front part a and the counter electrode is a rear part b, the stretchable bay part 23 is arranged in the front part a. This means.

本発明の請求項1により、係止突起21の一部に、平断面略湾曲形状を成しスカート20外側に向けて湾出し、キャップ打栓時および開栓時に湾曲部分が強制的に拡開され、キャップ施蓋時に湾曲部分が収縮して前記係止突起21が前記係合凹部に係止するように設けた伸縮湾部23を有するので、指で持ち上げるだけで開栓可能な樹脂製キャップにおいて、打栓性、密封性、開栓性に優れ、特に、実用的な再シールを可能にしている。しかも、紙パックで可能になっていた実用的な再シール機能を樹脂製キャップにも備えることができたので、牛乳瓶の施蓋に極めて好適となる。また、極めてシンプルな構成で汎用性に富むものであるから、牛乳瓶の使用に限定されず、全ての広口瓶に適用可能である。   According to the first aspect of the present invention, a part of the locking projection 21 has a substantially curved shape in cross section and protrudes toward the outside of the skirt 20, and the curved portion is forcibly expanded when the cap is plugged and opened. In addition, since it has the expansion / contraction bay portion 23 provided so that the curved portion contracts when the cap is applied and the locking projection 21 is locked to the engagement recess, the resin cap can be opened simply by lifting it with a finger. Are excellent in plugging performance, sealing performance, and opening performance, and in particular, practical re-sealing is possible. In addition, the resin cap can be provided with a practical reseal function that has been possible with a paper pack, which makes it extremely suitable for the cover of milk bottles. Moreover, since it is extremely simple and versatile, it is not limited to the use of milk bottles and can be applied to all wide-mouth bottles.

請求項2により、スカート20から前記伸縮湾部23に至る肉厚を均一の肉厚に形成したことで、開栓時に伸縮湾部23が拡開しても、伸縮湾部23が再び元の形状に戻る。したがって、係止突起21による密封性能は担保され、実用的な再シールを可能にすると共に、瓶の内圧に変化が生じてもキャップが外れる虞はない。   According to claim 2, by forming the wall thickness from the skirt 20 to the stretchable bay portion 23 to a uniform thickness, even if the stretchable bay portion 23 is expanded at the time of opening, the stretchable bay portion 23 is restored to the original. Return to shape. Therefore, the sealing performance by the locking projection 21 is ensured, enabling practical resealing, and there is no possibility that the cap will come off even if the internal pressure of the bottle changes.

請求項3の如く、伸縮湾部23を正面略三角形状に形成し、スカート20の下端部に近くなるほど湾曲部分が広がるように設けたことで、開栓時の操作性を容易にすることができる。この結果、開栓時に、勢いが余って内容物をこぼすなどといった虞は解消した。また、現状の生産ラインを用いた製造が可能になり、目付を少なくし、肉厚が略均一の為成形性が良く、良製品の提供を実現できる。   As in claim 3, the stretchable bay portion 23 is formed in a substantially triangular shape on the front side, and the curved portion is widened toward the lower end of the skirt 20, thereby facilitating operability at the time of opening. it can. As a result, the risk of spilling the contents excessively at the time of opening was eliminated. In addition, manufacturing using the current production line is possible, the basis weight is reduced, the thickness is substantially uniform, the moldability is good, and a good product can be provided.

請求項4又は請求項5に記載の如く伸縮湾部23を配設することで、開栓操作性を更に良好にすることができるものである。   By disposing the stretchable bay portion 23 as described in claim 4 or claim 5, the opening operability can be further improved.

このように、本発明によると、指で持ち上げるだけで開栓可能な樹脂製キャップにおいて、打栓性、密封性、開栓性に優れ、特に、実用的な再シール機能を有するなどといった有益な種々の効果を奏するものである。   As described above, according to the present invention, a resin cap that can be opened simply by lifting with a finger is excellent in plugging performance, sealing performance, and opening performance, and particularly has a practical reseal function. There are various effects.

本発明の最良の形態は、係止突起21の一部に、平断面略湾曲形状を成しスカート20外側に向けて湾出し、キャップ打栓時および開栓時に湾曲部分が強制的に拡開され、キャップ施蓋時に湾曲部分が収縮して前記係止突起21が前記係合凹部に係止するように設けた伸縮湾部23を有し、スカート20から前記伸縮湾部23に至る肉厚を均一の肉厚に形成したことで、当初の目的を達成するものである。   In the best mode of the present invention, a part of the locking projection 21 has a substantially curved shape in cross section and extends toward the outside of the skirt 20, and the curved portion is forcibly expanded when the cap is plugged and opened. And has a stretchable bay portion 23 provided so that the curved portion contracts when the cap is applied and the locking projection 21 is locked to the engagement recess, and the wall thickness extends from the skirt 20 to the stretchable bay portion 23. Is formed to have a uniform thickness, thereby achieving the original purpose.

本発明樹脂製キャップは、天板10と、スカート20と、該スカート20の外側面に突設して手指を係止する係止片22とを有し、指で持ち上げるだけで開栓可能に設けた樹脂製キャップである(図8、図9参照)。   The resin cap of the present invention has a top plate 10, a skirt 20, and a locking piece 22 that protrudes from the outer surface of the skirt 20 and locks a finger so that it can be opened simply by lifting the finger. This is a resin cap provided (see FIGS. 8 and 9).

天板10は、キャップ施蓋時に瓶口部Pの上部端面に圧接し、瓶口部Pの内周面に嵌合するインナーリング11を天板10の下面に突設している(図5参照)。   The top plate 10 is in pressure contact with the upper end surface of the bottle mouth portion P when the cap is covered, and an inner ring 11 that fits to the inner peripheral surface of the bottle mouth portion P projects from the lower surface of the top plate 10 (FIG. 5). reference).

スカート20は、天板10から延長形成されて瓶口部Pの外側面に圧着する部材で、該スカート20には、更に係止突起21、係止片22、伸縮湾部23を設けている(図2、図3参照)。   The skirt 20 is a member that extends from the top plate 10 and is crimped to the outer surface of the bottle mouth portion P. The skirt 20 is further provided with a locking projection 21, a locking piece 22, and a telescopic bay portion 23. (See FIGS. 2 and 3).

係止突起21は、スカート20の下端部内面に設けられ、瓶口部Pの外側面に設けられた係合凹部に係止する(図5参照)。図示の係止突起21は、断面略三角形状を成している。係止片22は、前述の如く、手指を係止する突起で、この係止片22を指で持ち上げるだけでキャップの開栓を可能にしている(図9参照)。   The locking projection 21 is provided on the inner surface of the lower end portion of the skirt 20 and is locked to an engaging recess provided on the outer surface of the bottle mouth portion P (see FIG. 5). The illustrated locking protrusion 21 has a substantially triangular cross section. As described above, the locking piece 22 is a projection for locking a finger, and the cap can be opened simply by lifting the locking piece 22 with a finger (see FIG. 9).

伸縮湾部23は、平断面略湾曲形状を成しスカート20外側に向けて湾出しており、係止突起21の一部に連続形成する(図1参照)。この伸縮湾部23の肉厚は、スカート20の肉厚すなわち、係止突起21の上部の肉厚と略等しくなるように形成する(図7参照)。   The stretchable bay portion 23 has a substantially curved shape in cross section and protrudes toward the outside of the skirt 20 and is continuously formed on a part of the locking projection 21 (see FIG. 1). The thickness of the stretchable bay portion 23 is formed to be substantially equal to the thickness of the skirt 20, that is, the thickness of the upper portion of the locking projection 21 (see FIG. 7).

すなわち、伸縮湾部23は、スカート20の係止突起21以外の部分と略同じ肉厚となり、係止突起21のみが厚くなるように形成している。この結果、キャップ打栓時および開栓時にスカート20が拡開しても、スカート20と同じ肉厚の湾曲部分が拡開時の変形を吸収するので、係止突起21の係止力が極端に低下することがなくなった。   That is, the stretchable bay portion 23 is formed to have substantially the same thickness as the portion other than the locking protrusion 21 of the skirt 20, and only the locking protrusion 21 is thick. As a result, even when the skirt 20 is expanded when the cap is plugged and opened, the curved portion having the same thickness as the skirt 20 absorbs deformation at the time of expansion, so that the locking force of the locking protrusion 21 is extremely high. No longer drops.

また、伸縮湾部23は、正面略三角形状を成し、前記スカート20の下端部に近くなるほど湾曲部分が広がるように形成している(図4参照)。そして、前記係止片22の中央からキャップの中心部に至る仮想線Xを中心線としたときに、該中心線Xの左右対象位置に伸縮湾部23を形成することで、開栓時に偏らずに済む(図10参照)。また、係止片22を設けた位置を前部aとし、この対極を後部bとしたときに、前記伸縮湾部23を前部aに多く配置することで、特に、開栓時の初期操作を容易にすることができる。   In addition, the stretchable bay portion 23 has a substantially triangular shape in the front, and is formed such that the curved portion expands toward the lower end of the skirt 20 (see FIG. 4). Then, when the virtual line X from the center of the locking piece 22 to the center of the cap is taken as the center line, the stretchable bay part 23 is formed at the left and right target positions of the center line X, so (See FIG. 10). In addition, when the position where the locking piece 22 is provided is the front part a and the counter electrode is the rear part b, by disposing a large number of the stretchable bay parts 23 in the front part a, particularly the initial operation at the time of opening the plug Can be made easier.

図10に示すNO.1〜NO.9のタイプは、本発明キャップにおける伸縮湾部23の配置位置を示したものである。伸縮湾部23は、各タイプの係止突起21(図示の円周)と仮想線Rとの交点に設けている。これらのタイプについて、開栓時に必要な外しトルクを測定し、更に、複数のパネラーにより、キャップを外す際の実際の感覚を判定する感覚テストを行った。感覚テストでは、瓶を台に置いてキャップを外す際の感覚と、瓶を持ってキャップを外す際の感覚とを夫々評価した。   The types of NO.1 to NO.9 shown in FIG. 10 indicate the arrangement positions of the stretchable bay portions 23 in the cap of the present invention. The stretchable bay portion 23 is provided at the intersection of each type of locking projection 21 (circumference in the drawing) and the virtual line R. About these types, the removal torque required at the time of opening was measured, and also the sensory test which judges the actual feeling at the time of removing a cap with a plurality of panelists was done. In the sensory test, the sensation of removing the cap by placing the bottle on the table and the sensation of removing the cap by holding the bottle were evaluated.

この結果、外しトルクでは、仮想線Xに直交する仮想線Yから係止片22側を前部aとすると、NO.3、NO.7、NO.9のタイプのように、仮想線Yから前部a方向に20度の範囲内に伸縮湾部23を設けたものが、少ないトルクで開栓できることがわかった。一方、感覚テストでは、NO.5、NO.7、NO.8のタイプの如く、仮想線Yを基準にした前部aと後部bとに満遍なく伸縮湾部23を設けたものが開け易いと感じられていた。NO.3のタイプは、特に瓶を手に持った状態で開栓しても安心して開けられると評価されている。また、NO.7及びNO.9は、いずれも外しトルクが小さく、感覚テストにおいても高い評価が得られている。   As a result, in the removal torque, if the locking piece 22 side from the imaginary line Y orthogonal to the imaginary line X is the front part a, as in the types of NO.3, NO.7, and NO.9, It turned out that what provided the expansion-contraction bay part 23 in the range of 20 degree | times to the front part a direction can be opened with little torque. On the other hand, in the sensory test, it is easy to open the ones with the stretchable bay portion 23 evenly in the front part a and the rear part b based on the imaginary line Y, such as the types of NO.5, NO.7, and NO.8. It was felt. The NO.3 type is evaluated as being able to open with confidence even if it is opened with the bottle held in hand. In addition, NO.7 and NO.9 both have low removal torque, and are highly evaluated in sensory tests.

これらの総合判定により、より開栓容易なタイプとして、特にNO.3、NO.7、NO.9のタイプを選択し、これらのタイプについて、更に、打栓時に必要なキャップ押圧力と、開栓時に必要な外しトルクと、これらの劣化値とについて、伸縮湾部23を設けていない比較品と比べている(表1、2参照)。   Based on these comprehensive judgments, NO.3, NO.7, and NO.9 are selected as types that are easier to open, and for these types, the cap pressing force required at the time of stoppering and the opening are also selected. About the removal torque required at the time of plugging, and these deterioration values, it compares with the comparative product which does not provide the expansion-and-contraction bay part 23 (refer Table 1, 2).

キャップ押圧力は、図11に示す測定方法による。この方法は、キャップが瓶に嵌合する際の力(Kg)を測定した。測定機はロードセルS(200 Kg)を使用し、台座T上に載置した瓶の口部にキャップを載せ、台座Tで瓶を押し上げてキャップが瓶口部に嵌合した時点の値を測定した。   The cap pressing force is based on the measurement method shown in FIG. This method measured the force (Kg) when the cap was fitted into the bottle. The measuring machine uses a load cell S (200 Kg), puts a cap on the mouth of the bottle placed on the pedestal T, pushes the bottle up on the pedestal T, and measures the value when the cap is fitted to the bottle mouth. did.

外しトルクは、図12に示す測定方法による。この方法は、係止片22に治具Wを係止して垂直に引き上げ、瓶からキャップが外れる際の力(Kg)を測定した。これらの測定方法で、本発明のタイプと比較した比較品は、スカート20の内周に係止突起21が設けられたもので、本発明との構成の違いは、伸縮湾部23の有無のみである。また、キャップの打栓や開栓は、合成樹脂の特性により、常温下よりも、低温下での打栓や開栓により高い力が必要になることから、瓶及びキャップの温度を、冷蔵庫から取出した直後の温度(摂氏10度)に設定し、この温度で前記測定を行った。   The removal torque is based on the measurement method shown in FIG. In this method, the jig W was locked to the locking piece 22 and pulled up vertically, and the force (Kg) when the cap was removed from the bottle was measured. In these measurement methods, the comparative product compared with the type of the present invention is provided with the locking projection 21 on the inner periphery of the skirt 20, and the difference in configuration from the present invention is only the presence or absence of the stretchable bay portion 23. It is. In addition, due to the characteristics of the synthetic resin, cap caps and caps require a higher force for plugging and opening at lower temperatures than at room temperature. The temperature was set immediately after removal (10 degrees Celsius), and the measurement was performed at this temperature.

Figure 2005313906
表1は、図11に示す測定方法により、打栓時に必要なキャップ押圧力を測定した結果である。この表によると、伸縮湾部23を設けていない比較品の1回目に12.50 Kgの押圧力が必要であったが、第3回目の押圧力は10.00 Kgとなり、押圧力が2.5 Kg下がっている。この値は、キャップの弾性変形を繰り返したことにより、収縮強度が落ちた値、すなわち劣化値(最初の値から最後の値を引いた値)となる。NO.3、NO.7、NO.9のタイプにおけるこの劣化値は、夫々1.5 Kg、1.0 Kg、0.17 Kgであり、いずれの劣化値も前記比較品の2.5 Kgよりも劣化が少ないことが分かる。
Figure 2005313906
Table 1 shows the results of measuring the cap pressing force required at the time of stoppering by the measuring method shown in FIG. According to this table, a pressing force of 12.50 Kg was required for the first comparison product without the stretchable bay 23, but the third pressing force was 10.00 Kg, and the pressing force was reduced by 2.5 Kg. . This value is a value in which the shrinkage strength is reduced due to repeated elastic deformation of the cap, that is, a deterioration value (a value obtained by subtracting the last value from the first value). The deterioration values of the NO.3, NO.7, and NO.9 types are 1.5 kg, 1.0 kg, and 0.17 kg, respectively, and it can be seen that the deterioration values are less than 2.5 kg of the comparative product. .

比較品は、スカート20の内周全域に係止突起21を突設したものなので、前記特許文献2乃至特許文献4の如く、この係止突起21に肉薄部を設けたキャップに比べて係止力は極めて高くなるが、その反面、強制拡開時に回復不能になるほど変形しないので、劣化値も少なくなる。この結果、本発明では、比較品と比べて少ない押圧力で施蓋することができる上、比較品よりも劣化値が少なくなっており、本発明の前記タイプNO.3、NO.7、NO.9における施蓋性および劣化値の優秀性が証明されている。   Since the comparative product has a locking projection 21 protruding from the entire inner periphery of the skirt 20, as in Patent Document 2 to Patent Document 4, the locking projection 21 is locked compared to a cap provided with a thin portion. The force is extremely high, but on the other hand, it does not deform so that it cannot be recovered at the time of forced expansion, so the deterioration value also decreases. As a result, in the present invention, the lid can be applied with less pressing force than the comparative product, and the deterioration value is smaller than that of the comparative product, and the type No. 3, NO. 7, NO of the present invention. The coverability and deterioration value in .9 are proven.

Figure 2005313906
表2は、図12に示す測定方法により、開栓時に必要なキャップの外しトルクを測定した結果である。この表によると、伸縮湾部23を設けていない比較品の第1回目の外しトルクが2.85 Kg、第3回目の外しトルクが2.40 Kgとなり、劣化値は0.45 Kgであった。
Figure 2005313906
Table 2 shows the results of measuring the cap removal torque necessary for opening the cap by the measurement method shown in FIG. According to this table, the first removal torque of the comparative product without the stretchable bay portion 23 was 2.85 kg, the third removal torque was 2.40 kg, and the deterioration value was 0.45 kg.

一方、本発明の前記タイプNO.3、NO.7、NO.9における劣化値は、夫々0.15 Kg、0.1 Kg、0.2 Kgであり、いずれのタイプも比較品より劣化値が少なくなっている。比較品の劣化値は、前述の如く、薄肉部等を設けた前記特許文献2乃至特許文献4より優れることから、開栓時の劣化値においても本発明の優秀性が証明される。   On the other hand, the deterioration values of the types No. 3, NO. 7, and NO. 9 of the present invention are 0.15 Kg, 0.1 Kg, and 0.2 Kg, respectively, and the deterioration values of all types are smaller than those of the comparative products. As described above, the deterioration value of the comparative product is superior to that of Patent Document 2 to Patent Document 4 provided with a thin wall portion, so that the superiority of the present invention is proved even in the deterioration value at the time of opening.

しかも、各タイプの外しトルクは、比較品に比べて1 Kg以上も少ない力で開栓できるので、本発明の前記タイプNO.3、NO.7、NO.9では、いかに容易に開栓可能となっているかが明らかである。また、打栓時の測定及び開栓時の測定は、いずれも3回ずつ行っているが、例えば3回の打栓測定を行うには少なくとも2回開栓する必要があり、同様に、3回の開栓測定を行う為に3回の打栓が必要になっている。したがって、前記測定では、必然的に本発明キャップの着脱操作を計6回行った測定値となっている。したがって、これら打栓時の押圧力や外しトルク、劣化値等の測定数値は、極めて実用的な数値であるといえる。   In addition, the removal torque of each type can be opened with less than 1 Kg compared to the comparative product, so how easy it is to open with the type No.3, NO.7, and NO.9 of the present invention. It is clear that In addition, the measurement at the time of plugging and the measurement at the time of opening are both performed three times each. For example, in order to perform three times of plugging measurement, it is necessary to open at least twice. Three times of plugging are required to measure the number of times of opening. Therefore, in the said measurement, it is a measured value which carried out attachment / detachment operation of this invention cap 6 times in total. Therefore, it can be said that the measured numerical values such as the pressing force at the time of plugging, the removal torque, and the deterioration value are extremely practical numerical values.

尚、本発明における図示例の各構成は、本発明の一実施例に過ぎず、NO.1〜NO.9に示すタイプの他、本発明キャップの形状、寸法等の設計変更、材質の転換及び形態の変更など、現在知られている技術範囲で自由に変更することができるものである。   In addition, each structure of the example of illustration in this invention is only one Example of this invention, the design change of the shape of this invention cap, a dimension, etc. other than the type shown to NO.1-NO.9, conversion of material It can be freely changed within a currently known technical range, such as a change of the form and the like.

本発明におけるキャップの一実施例を示す斜視図である。It is a perspective view which shows one Example of the cap in this invention. 本発明におけるキャップの一実施例を示す斜視図である。It is a perspective view which shows one Example of the cap in this invention. 本発明におけるキャップの一実施例を示す底面図である。It is a bottom view which shows one Example of the cap in this invention. 本発明におけるキャップの一実施例を示す側面図である。It is a side view which shows one Example of the cap in this invention. 本発明におけるキャップの一実施例を示す縦断面図である。It is a longitudinal cross-sectional view which shows one Example of the cap in this invention. 本発明におけるキャップの一実施例を示す平面図である。It is a top view which shows one Example of the cap in this invention. 本発明におけるキャップの一実施例を示す平断面図である。It is a plane sectional view showing one example of a cap in the present invention. 本発明におけるキャップの装着状態を示す斜視図である。It is a perspective view which shows the mounting state of the cap in this invention. 本発明におけるキャップの一部開栓状態を示す斜視図である。It is a perspective view which shows the partial opening state of the cap in this invention. 本発明における伸縮湾部の配置位置を変えたタイプを示す平面図である。It is a top view which shows the type which changed the arrangement position of the expansion-contraction bay part in this invention. 本発明における打栓時のキャップ押圧力を測定する装置を示す概略図である。It is the schematic which shows the apparatus which measures the cap pressing force at the time of stoppering in this invention. 本発明における開栓時のキャップ外しトルクを測定する装置を示す概略図である。It is the schematic which shows the apparatus which measures the cap removal torque at the time of the opening in this invention.

符号の説明Explanation of symbols

X、Y、R 仮想線
a 前部
b 後部
P 瓶口部
10 天板
11 インナーリング
20 スカート
21 係止突起
22 係止片
23 伸縮湾部
X, Y, R Virtual line a Front part b Rear part P Bottle mouth part
10 Top plate 11 Inner ring 20 Skirt 21 Locking protrusion 22 Locking piece 23 Stretching bay

Claims (5)

瓶口部の上部端面に圧接する天板と、該天板の下面に設けられ瓶口部の内周面に嵌合するインナーリングと、前記天板から延長形成されて瓶口部の外側面に圧着するスカートと、該スカートの下端部内面に設けられ、前記瓶口部の外側面に設けられた係合凹部に係止する係止突起と、スカートの外側面に突設され、栓開栓時に手指を係止せしめる係止片とを有する樹脂製キャップにおいて、前記係止突起の一部に、平断面略湾曲形状を成しスカート外側に向けて湾出し、キャップ打栓時および開栓時に湾曲部分が強制的に拡開され、キャップ施蓋時に湾曲部分が収縮して前記係止突起が前記係合凹部に係止するように設けた伸縮湾部を有することを特徴とする樹脂製キャップ。   A top plate that is in pressure contact with the upper end surface of the bottle mouth portion, an inner ring that is provided on the lower surface of the top plate and that fits on the inner peripheral surface of the bottle mouth portion, and is formed to extend from the top plate and is outside the bottle mouth portion. A skirt that is crimped to the skirt, a locking projection that is provided on the inner surface of the lower end of the skirt and that is engaged with an engagement recess provided on the outer surface of the bottle mouth, and is provided on the outer surface of the skirt, In a resin cap having a locking piece for locking a finger at the time of plugging, a part of the locking projection has a substantially curved shape in a plane cross section and protrudes toward the outside of the skirt. A resinous product characterized in that it has a stretchable bay portion provided so that the curved portion is forcibly expanded sometimes and the curved portion contracts when the cap is covered and the locking projection is locked to the engaging recess. cap. 前記スカートから前記伸縮湾部に至る肉厚を略均一の肉厚に形成した請求項1記載の樹脂製キャップ。   The resin cap according to claim 1, wherein the thickness from the skirt to the stretchable bay portion is formed to be substantially uniform. 前記伸縮湾部は、正面略三角形状を成し、前記スカートの下端部に近くなるほど湾曲部分が広がるように形成した請求項1又は請求項2記載の樹脂製キャップ。   3. The resin cap according to claim 1, wherein the stretchable bay portion has a substantially triangular shape in front and is formed such that a curved portion spreads toward a lower end portion of the skirt. 前記係止片の中央からキャップの中心部に至る仮想線を中心線としたときに、前記伸縮湾部を該中心線の左右対象位置に形成した請求項1乃至3いずれか記載の樹脂製キャップ。   The resin cap according to any one of claims 1 to 3, wherein the stretchable bay portion is formed at a left and right target position of the center line when a virtual line from the center of the locking piece to the center of the cap is used as a center line. . 前記係止片を設けた位置を前部とし、この対極を後部としたときに、前記伸縮湾部を前部に多く配置した請求項1乃至4いずれか記載の樹脂製キャップ。
The resin cap according to any one of claims 1 to 4, wherein when the position where the locking piece is provided is a front part and the counter electrode is a rear part, a large number of the stretchable bay parts are arranged at the front part.
JP2004130875A 2004-04-27 2004-04-27 Resin cap Expired - Fee Related JP4042135B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004130875A JP4042135B2 (en) 2004-04-27 2004-04-27 Resin cap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004130875A JP4042135B2 (en) 2004-04-27 2004-04-27 Resin cap

Publications (2)

Publication Number Publication Date
JP2005313906A true JP2005313906A (en) 2005-11-10
JP4042135B2 JP4042135B2 (en) 2008-02-06

Family

ID=35441740

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004130875A Expired - Fee Related JP4042135B2 (en) 2004-04-27 2004-04-27 Resin cap

Country Status (1)

Country Link
JP (1) JP4042135B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011178427A (en) * 2010-02-26 2011-09-15 Yoshino Kogyosho Co Ltd Hermetic container
JP2011213380A (en) * 2010-03-31 2011-10-27 Yoshino Kogyosho Co Ltd Storage container
KR200473727Y1 (en) 2013-06-20 2014-07-24 주식회사 대륙제관 Combination structure of cap for liquid can)
JP7421910B2 (en) 2019-11-22 2024-01-25 日本クロージャー株式会社 Plug-in synthetic resin cap

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011178427A (en) * 2010-02-26 2011-09-15 Yoshino Kogyosho Co Ltd Hermetic container
JP2011213380A (en) * 2010-03-31 2011-10-27 Yoshino Kogyosho Co Ltd Storage container
KR200473727Y1 (en) 2013-06-20 2014-07-24 주식회사 대륙제관 Combination structure of cap for liquid can)
JP7421910B2 (en) 2019-11-22 2024-01-25 日本クロージャー株式会社 Plug-in synthetic resin cap

Also Published As

Publication number Publication date
JP4042135B2 (en) 2008-02-06

Similar Documents

Publication Publication Date Title
JP3990807B2 (en) Plastic cap
JP3219774B2 (en) Leak-prevention closures for containers with modified designation
CN1824584A (en) Tamper-resistant container with tamper-evident feature and method of forming the same
US3979003A (en) Re-usable frangible closure
WO2005056411A1 (en) Closure plug and overseal
JP2010208650A (en) Packaging container
JP4042135B2 (en) Resin cap
JP4813338B2 (en) Container cap and packing used therefor
JP6198318B2 (en) Inner mating packaging container with tamper-proof structure
JP4979128B2 (en) Easy-to-open can lid
JP2007186230A (en) Packaging vessel
JP4778222B2 (en) How to use the cap of the container, the cap of the container, and the inner packing used for these
JP4580064B2 (en) Hinged cap
JP3958398B2 (en) Resin cap
JP2005041484A (en) Plug
JPH0330278Y2 (en)
JP4267124B2 (en) Resin cap
JP2009241939A (en) Over-cap having pilfer-proof band
JP4205801B2 (en) Plastic container lid
JP4195248B2 (en) Plastic cap
JP2000255618A (en) Cap having indicator
JPH072429Y2 (en) Molded product for heat shrinkable lid
JPH0420761Y2 (en)
JP2000238815A (en) Resin cap
WO2019193808A1 (en) Container assembly, method for manufacturing the same, and container

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20061213

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20070123

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20070326

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20071016

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20071102

R150 Certificate of patent (=grant) or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101122

Year of fee payment: 3

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111122

Year of fee payment: 4

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111122

Year of fee payment: 4

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111122

Year of fee payment: 4

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121122

Year of fee payment: 5

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131122

Year of fee payment: 6

LAPS Cancellation because of no payment of annual fees