JP6875892B2 - Sealing device - Google Patents

Sealing device Download PDF

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JP6875892B2
JP6875892B2 JP2017053769A JP2017053769A JP6875892B2 JP 6875892 B2 JP6875892 B2 JP 6875892B2 JP 2017053769 A JP2017053769 A JP 2017053769A JP 2017053769 A JP2017053769 A JP 2017053769A JP 6875892 B2 JP6875892 B2 JP 6875892B2
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cap
screw
inner plug
main body
sealing device
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JP2018154385A (en
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孝光 磯貝
孝光 磯貝
亀田 克巳
克巳 亀田
諒 船島
諒 船島
金野 誠
誠 金野
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Dai Nippon Printing Co Ltd
Tokan Kogyo Co Ltd
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Dai Nippon Printing Co Ltd
Tokan Kogyo Co Ltd
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Description

本発明は、容器の口部に装着される封止装置に関し、特に外ネジと内ネジとを有する封止装置に関する。 The present invention relates to a sealing device attached to the mouth of a container, and more particularly to a sealing device having an external screw and an internal screw.

容器の口部に用いられる公知の封止装置として、本体と上蓋とを備え、本体において、ボトルの口部に嵌着される筒状部と、その内側にスコアーを介して連設されている分離部又は中栓とを設けたものが存在する(特許文献1参照)。 As a known sealing device used for the mouth of a container, a main body and an upper lid are provided, and in the main body, a tubular portion to be fitted to the mouth of the bottle and a tubular portion inside the main body via a score are continuously provided. Some are provided with a separating portion or an inner plug (see Patent Document 1).

この封止装置では、予め本体の分離部を上蓋に対して逆ネジで取り付けてあり、分離部等の取り付けを容易にしつつ取り外しを困難にするため、ネジ山の断面をかえり形状又はバーブ状としている。これにより、開封時にボトルの口部に対して順ネジで取り付けられた上蓋を外すようにねじ戻すことによって本体の分離部と上蓋とに移動差を生じさせ、或いは分離部を本体の外周側に対して強制的に回転させることができ、それによって本体の筒状部から分離部を分離するとともに、その分離部を上蓋に保持させることとしている。このキャップ構造によれば、上蓋を緩めるように回転させるだけで簡単に開封を行うことができ、開封によって分離された分離部を上蓋の上端内筒に保持させるので、分離後の分離部を開封後においてシールとして機能させることができ、分離部がいわゆるゴミとなることがない。 In this sealing device, the separating part of the main body is attached to the upper lid in advance with a reverse screw, and in order to facilitate the attachment of the separating part and make it difficult to remove, the cross section of the screw thread is made into a burr shape or a barb shape. There is. As a result, when the bottle is opened, the upper lid attached to the mouth of the bottle is screwed back so as to remove the upper lid, which causes a movement difference between the separating portion of the main body and the upper lid, or the separating portion is moved to the outer peripheral side of the main body. On the other hand, it can be forcibly rotated to separate the separation part from the tubular part of the main body and hold the separation part on the upper lid. According to this cap structure, the opening can be easily performed by simply rotating the upper lid so as to loosen it, and the separating portion separated by opening is held in the upper end inner cylinder of the upper lid, so that the separated portion after separation is opened. It can be made to function as a seal later, and the separation part does not become so-called dust.

しかしながら、上記封止装置では、分離部と本体の外周側との間に形成された薄肉部が開封前に破断し易くなる傾向がある。 However, in the sealing device, the thin portion formed between the separating portion and the outer peripheral side of the main body tends to be easily broken before opening.

国際公開第2014/115857号公報International Publication No. 2014/115857

本発明は、上記背景技術に鑑みてなされたものであり、開封前に分離部又は中栓と本体の外周側との間において切断予定部分に過度の力がかかることを防止して、切断予定部分の意図しない破断を生じにくくした封止装置を提供することを目的とする。 The present invention has been made in view of the above background technique, and is planned to be cut by preventing an excessive force from being applied to a portion to be cut between the separation part or the inner plug and the outer peripheral side of the main body before opening. It is an object of the present invention to provide a sealing device in which unintended breakage of a portion is less likely to occur.

上記課題を解決するため、本発明に係る封止装置は、本体とキャップとを備え、本体とキャップとの間に設けられた正ネジタイプの第1締結部によって、キャップの着脱を可能にするとともに、第1締結部よりも内側において本体とキャップとの間に設けられた逆ネジタイプの第2締結部によって、開封に際して本体から中栓を分離してキャップに捕捉させる封止装置であって、開封前において本体にキャップを組付けた状態で、第2締結部を構成するキャップ内ネジと中栓内ネジとの間には、ネジ軸に沿った上下方向に関して対向するネジ山間の全体にクリアランスが設けられている。 In order to solve the above problems, the sealing device according to the present invention includes a main body and a cap, and the cap can be attached and detached by a positive screw type first fastening portion provided between the main body and the cap. At the same time, it is a sealing device that separates the inner plug from the main body and captures it on the cap by the reverse screw type second fastening part provided between the main body and the cap inside the first fastening part. With the cap attached to the main body before opening, between the internal screw of the cap and the internal screw of the inner plug that make up the second fastening part, the entire space between the threads facing each other in the vertical direction along the screw axis. There is a clearance.

上記封止装置によれば、開封前において本体にキャップを組付けた状態で第2締結部を構成するキャップ内ネジと中栓内ネジとの間にネジ軸に沿った上下方向に関して対向するネジ山間の全体にクリアランスが設けられているので、開封前に中栓と本体の外周側との間において切断予定部分に過度の力がかかることを防止して、切断予定部分の意図しない破断を生じにくくすることができる。 According to the above-mentioned sealing device, screws facing each other in the vertical direction along the screw shaft between the cap inner screw and the inner plug inner screw constituting the second fastening portion with the cap attached to the main body before opening. Since a clearance is provided in the entire mountain area, it is possible to prevent an excessive force from being applied to the planned cutting portion between the inner plug and the outer peripheral side of the main body before opening, resulting in an unintended breakage of the planned cutting portion. It can be made difficult.

本発明の具体的な態様又は観点では、上記封止装置において、キャップ内ネジは、キャップの天板から下に延びるキャップ円筒部の外側面に形成され、中栓内ネジは、中栓の封止体の外縁から上に延びる中栓円筒部の内側面に形成されている。 In a specific aspect or viewpoint of the present invention, in the sealing device, the cap inner screw is formed on the outer surface of the cap cylindrical portion extending downward from the top plate of the cap, and the inner plug inner screw is the sealing of the inner plug. It is formed on the inner surface of the inner plug cylindrical portion extending upward from the outer edge of the stopper.

本発明の別の観点では、中栓と本体の外周部との間に、薄肉部を有する。この場合、薄肉部が切断予定部分(切断される部分)となり、開封時に中栓を本体から切り離しやすくすることができる。 In another aspect of the present invention, a thin portion is provided between the inner plug and the outer peripheral portion of the main body. In this case, the thin-walled portion becomes the portion to be cut (the portion to be cut), and the inner plug can be easily separated from the main body at the time of opening.

本発明のさらに別の観点では、キャップ円筒部の先端部の外周面と中栓円筒部の根元部の内周面とは、径方向に接している。この場合、中栓とキャップとが径方向で接触し、キャップによって中栓を保持しているため、例えば紙カートンに注出口を超音波溶着する際に、薄肉部に対する超音波振動の影響が小さく抑えられるため、超音波振動による薄肉部の破れ、穴あき等を防ぐことができる。 From yet another aspect of the present invention, the outer peripheral surface of the tip portion of the cap cylindrical portion and the inner peripheral surface of the root portion of the inner plug cylindrical portion are in contact with each other in the radial direction. In this case, since the inner plug and the cap are in radial contact and the inner plug is held by the cap, the influence of ultrasonic vibration on the thin-walled portion is small, for example, when the spout is ultrasonically welded to a paper carton. Since it is suppressed, it is possible to prevent tearing, perforation, etc. of the thin-walled portion due to ultrasonic vibration.

本発明のさらに別の観点では、キャップ円筒部の根元部の外周面と中栓円筒部の先端部の内周面とは、径方向に接している。この場合、中栓とキャップとが径方向で接触し、中栓が保持されているため、例えば紙カートンに注出口を超音波溶着する際に、薄肉部に対する超音波振動の影響が小さく抑えられるため、超音波振動による薄肉部の破れ、穴あき等を防ぐことができる。 From yet another aspect of the present invention, the outer peripheral surface of the root portion of the cap cylindrical portion and the inner peripheral surface of the tip portion of the inner plug cylindrical portion are in contact with each other in the radial direction. In this case, since the inner plug and the cap are in radial contact and the inner plug is held, the influence of ultrasonic vibration on the thin-walled portion can be suppressed to a small extent when the spout is ultrasonically welded to a paper carton, for example. Therefore, it is possible to prevent tearing, perforation, etc. of the thin-walled portion due to ultrasonic vibration.

本発明のさらに別の観点では、キャップの天板から下に延びて中栓円筒部を周囲から覆う円筒状の外側サポート部をさらに備え、外側サポート部の先端部の内周面と中栓円筒部の根元部の外周面とは、径方向に接している。この場合、中栓とキャップとが径方向で接触し、キャップによって中栓を保持しているため、例えば紙カートンに注出口を超音波溶着する際に、薄肉部に対する超音波振動の影響が小さく抑えられるため、超音波振動による薄肉部の破れ、穴あき等を防ぐことができる。 In yet another aspect of the present invention, a cylindrical outer support portion extending downward from the top plate of the cap and covering the inner plug cylindrical portion from the periphery is further provided, and the inner peripheral surface of the tip portion of the outer support portion and the inner plug cylinder are provided. It is in contact with the outer peripheral surface of the root portion in the radial direction. In this case, since the inner plug and the cap are in radial contact and the inner plug is held by the cap, the influence of ultrasonic vibration on the thin-walled portion is small, for example, when the spout is ultrasonically welded to a paper carton. Since it is suppressed, it is possible to prevent tearing, perforation, etc. of the thin-walled portion due to ultrasonic vibration.

本発明のさらに別の観点では、キャップ内ネジと中栓内ネジとは、中栓を支持部から引き抜くよりも中栓を支持部に押し込むことを容易にするかえり形状を有する。この場合、キャップを本体側に組付ける際には、例えばキャップを締め込むように回転させることで、かえり形状が、ネジ山の強制的な乗り越えによってキャップを所定の位置まで押し込むことを許容する。 From yet another aspect of the present invention, the cap inner screw and the inner plug inner screw have a burr shape that facilitates pushing the inner plug into the support portion rather than pulling out the inner plug from the support portion. In this case, when assembling the cap to the main body side, for example, by rotating the cap so as to tighten it, the burr shape allows the cap to be pushed into a predetermined position by forcibly overcoming the screw thread.

本発明の一実施形態に係る封止装置を説明するための断面図である。It is sectional drawing for demonstrating the sealing apparatus which concerns on one Embodiment of this invention. (A)及び(B)は、第2締結部の周辺構造を説明する拡大断面図である。(A) and (B) are enlarged cross-sectional views explaining the peripheral structure of the second fastening part. 第2締結部のネジ山を説明する拡大断面図である。It is an enlarged sectional view explaining the screw thread of the 2nd fastening part. 第2締結部の開封前の締結状態を説明する断面図である。It is sectional drawing explaining the fastening state before opening of the 2nd fastening part. 第2締結部の周辺の配置関係等を説明する拡大断面図である。It is an enlarged cross-sectional view explaining the arrangement relation, etc. around the 2nd fastening part. 外側サポート部の先端周辺を説明する拡大断面図である。It is an enlarged cross-sectional view explaining the periphery of the tip of the outer support part. 図1に示す封止装置の使用方法を説明する断面図である。It is sectional drawing explaining the use method of the sealing apparatus shown in FIG. 図1に示す封止装置の使用方法を説明する断面図である。It is sectional drawing explaining the use method of the sealing apparatus shown in FIG. 図1に示す封止装置の使用方法を説明する断面図である。It is sectional drawing explaining the use method of the sealing apparatus shown in FIG. 図1に示す封止装置の使用方法を説明する断面図である。It is sectional drawing explaining the use method of the sealing apparatus shown in FIG. 図1に示す封止装置の変形例を説明する拡大断面図である。It is an enlarged cross-sectional view explaining the modification of the sealing apparatus shown in FIG.

図1を参照して、本発明に係る容器の封止装置の一実施形態について説明する。図示の封止装置100は、紙パック、パウチ容器等である容器2の孔2aに取り付けられる本体10と、本体10を覆うようにして本体10に装着されるキャップ20とによって構成されている。 An embodiment of the container sealing device according to the present invention will be described with reference to FIG. The illustrated sealing device 100 includes a main body 10 attached to a hole 2a of a container 2 such as a paper carton or a pouch container, and a cap 20 attached to the main body 10 so as to cover the main body 10.

本体10は、樹脂製の一体成形品であり、容器2の孔2aの周縁部2bに沿って固定された外周部11と、開封時に外周部11から分離される中栓12とを備える。以下、開封とは、中栓12が外周部11から分離されることを意味し、開封後にキャップ20を開けることについては開栓と呼ぶことにする。 The main body 10 is an integrally molded product made of resin, and includes an outer peripheral portion 11 fixed along the peripheral edge portion 2b of the hole 2a of the container 2 and an inner plug 12 separated from the outer peripheral portion 11 at the time of opening. Hereinafter, opening means that the inner plug 12 is separated from the outer peripheral portion 11, and opening the cap 20 after opening is referred to as opening.

本体10の外周部11は、中栓12の分離後に容器2の内容物のための注出口を形成する部分であり、本体10の軸心であるネジ軸AXに沿って容器2の外側又は上側に延びる円筒状の部材である本体外周壁31を有している。さらに、外周部11は、本体外周壁31の下端において半径方向外方に張り出す肉厚の本体台座32と、本体台座32の周面から半径方向外方に張り出す肉薄の溶着部33とを有している。溶着部33の上面は、容器2の周縁部2bの下面に対して超音波融着や接着剤による接着等によって固定されている。本体台座32の周面には、周方向2〜8箇所に等間隔に係止部34が半径方向外方に張り出して形成されている。この係止部34は、溶着部33に対してネジ軸AXに沿った方向に関して間隔をもって形成され、その間隔に、容器2の周縁部2bの内縁を圧入させることで、外周部11の周縁部2bからの脱落を補助的に防止する。また、本体10の本体外周壁31には、外周面に、キャップ20に螺着するための本体外ネジ51が形成されている。なお、ネジ軸AXとは、本体10及びキャップ20の中心を通る軸又はキャップ20の回転軸を意味する。 The outer peripheral portion 11 of the main body 10 is a portion that forms a spout for the contents of the container 2 after the inner plug 12 is separated, and is the outer side or the upper side of the container 2 along the screw shaft AX that is the axis of the main body 10. It has a main body outer peripheral wall 31 which is a cylindrical member extending to. Further, the outer peripheral portion 11 has a thick main body pedestal 32 protruding outward in the radial direction at the lower end of the outer peripheral wall 31 of the main body and a thin welded portion 33 protruding outward in the radial direction from the peripheral surface of the main body pedestal 32. Have. The upper surface of the welded portion 33 is fixed to the lower surface of the peripheral edge portion 2b of the container 2 by ultrasonic fusion, adhesion with an adhesive, or the like. On the peripheral surface of the main body pedestal 32, locking portions 34 are formed at 2 to 8 points in the circumferential direction at equal intervals so as to project outward in the radial direction. The locking portions 34 are formed at intervals with respect to the welding portion 33 in the direction along the screw shaft AX, and by press-fitting the inner edge of the peripheral edge portion 2b of the container 2 at the intervals, the peripheral edge portion of the outer peripheral portion 11 is press-fitted. Auxiliary prevention of dropping from 2b. Further, on the outer peripheral surface of the main body outer peripheral wall 31 of the main body 10, a main body external screw 51 for screwing to the cap 20 is formed. The screw shaft AX means a shaft passing through the center of the main body 10 and the cap 20 or a rotation shaft of the cap 20.

図1及び図2(A)等に示すように、本体10の中栓12は、底部に配置された円板状の封止体41と、この封止体41の外縁から上方に延びる円筒状の中栓円筒部42とを備えている。この封止体41の外縁と中栓円筒部42の下端部とが連結されている外周側境界部17は、環状の薄肉部15によって本体10の外周部11に連結されている。薄肉部15の下面には、環状でV溝状のスコアー16が形成されている。薄肉部15は、本体10から中栓12を分離する開封時に切断される。中栓円筒部42は、外側の本体外周壁31の内側に同芯で離間して配置されている。中栓円筒部42の内周面(内側面)には、本体外ネジ51に対して螺旋方向が異なり逆ネジの関係にある中栓内ネジ52が形成されている。 As shown in FIGS. 1 and 2A, the inner plug 12 of the main body 10 has a disk-shaped sealing body 41 arranged at the bottom and a cylindrical shape extending upward from the outer edge of the sealing body 41. It is provided with an inner plug cylindrical portion 42. The outer peripheral side boundary portion 17 in which the outer edge of the sealing body 41 and the lower end portion of the inner plug cylindrical portion 42 are connected is connected to the outer peripheral portion 11 of the main body 10 by an annular thin-walled portion 15. An annular V-groove-shaped score 16 is formed on the lower surface of the thin portion 15. The thin portion 15 is cut when the inner plug 12 is separated from the main body 10 and opened. The inner plug cylindrical portion 42 is concentrically and spaced apart from the inside of the outer peripheral wall 31 of the main body. On the inner peripheral surface (inner side surface) of the inner plug cylindrical portion 42, an inner plug inner screw 52 having a spiral direction different from that of the main body outer screw 51 and having a reverse screw relationship is formed.

キャップ20は、樹脂製の一体成形品であり、外側の部分として、円板状のキャップ天板21と、円筒状のキャップ外周壁22とを備える。キャップ外周壁22の周囲には、ローレットが形成されている。キャップ20は、キャップ外周壁22と同芯で内側に、最も内側に配置された内側支持部であるキャップ円筒部23と、キャップ円筒部23の外側に配置された外側サポート部24とを備える。また、キャップ外周壁22と外側サポート部24との間には、同様に同芯で円筒状であるがネジ軸AX方向に比較的短いインナーリング25が設けられている。このインナーリング25によって容器2の開口部11aのシールが図られている。キャップ円筒部23と、外側サポート部24と、インナーリング25とは、キャップ天板21によって連設されている。そして、キャップ外周壁22の内周側面には、本体10の本体外周壁31の外周側面に形成された本体外ネジ51に螺合するキャップ外ネジ53が形成され、キャップ円筒部23の外周面(外側面)には、本体10に設けた中栓12の中栓円筒部42の内周側面に形成された中栓内ネジ52に螺合するキャップ内ネジ54が形成されている。 The cap 20 is an integrally molded product made of resin, and includes a disk-shaped cap top plate 21 and a cylindrical cap outer peripheral wall 22 as outer portions. A knurl is formed around the outer peripheral wall 22 of the cap. The cap 20 includes a cap cylindrical portion 23 which is an inner support portion arranged on the innermost side in the same core as the cap outer peripheral wall 22, and an outer support portion 24 arranged on the outer side of the cap cylindrical portion 23. Further, between the outer peripheral wall 22 of the cap and the outer support portion 24, an inner ring 25 which is similarly concentric and cylindrical but relatively short in the screw shaft AX direction is provided. The inner ring 25 seals the opening 11a of the container 2. The cap cylindrical portion 23, the outer support portion 24, and the inner ring 25 are connected to each other by the cap top plate 21. Then, on the inner peripheral side surface of the cap outer peripheral wall 22, a cap outer screw 53 screwed with the main body outer screw 51 formed on the outer peripheral side surface of the main body outer peripheral wall 31 of the main body 10 is formed, and the outer peripheral surface of the cap cylindrical portion 23 is formed. On the (outer surface), a cap inner screw 54 screwed into the inner stopper inner screw 52 formed on the inner peripheral side surface of the inner stopper cylindrical portion 42 of the inner stopper 12 provided on the main body 10 is formed.

以上において、本体10の本体外周壁31の本体外ネジ51と、キャップ20のキャップ外周壁22のキャップ外ネジ53とは、キャップ20の本体10に対する着脱を可能にする第1締結部50aを構成している。また、本体10の中栓円筒部42の中栓内ネジ52と、キャップ20のキャップ円筒部23のキャップ内ネジ54とは、本体10のうち中栓12をキャップ20のキャップ円筒部23に締め付けて固定するための第2締結部50bを構成している。つまり、キャップ20のキャップ円筒部23は、第2締結部50bによって中栓12を捕捉して当該中栓12を本体10又は外周部11から分離するための支持部として機能している。第1締結部50aと第2締結部50bとは、互いに逆の螺進関係にある。具体的には、第1締結部50aは、反時計方向の回転で緩む正ネジタイプの螺合部であり、第2締結部50bは、反時計方向の回転で締まる逆ネジタイプの螺合部である。すなわち、キャップ20のキャップ外周壁22を上側から見て反時計方向に回転させることで第1締結部50aが緩むようにねじ戻されて上昇する場合、キャップ20のキャップ円筒部23を上側から見て反時計方向に回転させることになって第2締結部50bが締め込まれてさらに上昇する。ここで、例えば第2締結部50bのねじ込み方向又は螺進方向等について詳細に説明する。本体10の中栓円筒部42にとっては、ネジ軸AXに沿った上側が、キャップ20のキャップ円筒部23に対して下側から見て反時計方向の回転によってねじ込みを行う螺進方向になっており、ネジ軸AXに沿った下側がキャップ円筒部23に対してねじ戻しを行う反螺進方向になっている。また、キャップ円筒部23にとっては、ネジ軸AXに沿った下側が中栓円筒部42に対して上側から見て反時計方向の回転によってねじ込みを行う螺進方向になっており、ネジ軸AXに沿った上側が中栓円筒部42に対してねじ戻しを行う反螺進方向になっている。 In the above, the main body external screw 51 of the main body outer peripheral wall 31 of the main body 10 and the cap external screw 53 of the cap outer peripheral wall 22 of the cap 20 form a first fastening portion 50a that enables the cap 20 to be attached to and detached from the main body 10. doing. Further, the inner plug inner screw 52 of the inner plug cylindrical portion 42 of the main body 10 and the inner cap inner screw 54 of the cap cylindrical portion 23 of the cap 20 tighten the inner plug 12 of the main body 10 to the cap cylindrical portion 23 of the cap 20. It constitutes a second fastening portion 50b for fixing. That is, the cap cylindrical portion 23 of the cap 20 functions as a support portion for capturing the inner plug 12 by the second fastening portion 50b and separating the inner plug 12 from the main body 10 or the outer peripheral portion 11. The first fastening portion 50a and the second fastening portion 50b have a spiraling relationship opposite to each other. Specifically, the first fastening portion 50a is a positive screw type screw portion that loosens by rotating counterclockwise, and the second fastening portion 50b is a reverse screw type screw portion that tightens by rotating counterclockwise. Is. That is, when the cap outer peripheral wall 22 of the cap 20 is rotated counterclockwise when viewed from above, the first fastening portion 50a is screwed back so as to loosen and rises, the cap cylindrical portion 23 of the cap 20 is viewed from above. The second fastening portion 50b is tightened to be rotated counterclockwise, and the second fastening portion 50b is further raised. Here, for example, the screwing direction or the screwing direction of the second fastening portion 50b will be described in detail. For the inner plug cylindrical portion 42 of the main body 10, the upper side along the screw shaft AX is the screwing direction in which screwing is performed by rotating counterclockwise with respect to the cap cylindrical portion 23 of the cap 20. The lower side along the screw shaft AX is in the counterclockwise direction in which the cap cylindrical portion 23 is screwed back. Further, for the cap cylindrical portion 23, the lower side along the screw shaft AX is in the screwing direction in which screwing is performed by rotating counterclockwise with respect to the inner plug cylindrical portion 42, and the screw shaft AX has a screw shaft. The upper side along the line is in the counterclockwise direction in which the screw is returned to the inner plug cylindrical portion 42.

なお、第2締結部50b、すなわち本体10の中栓12に形成される中栓内ネジ52と、それに噛合するキャップ20のキャップ円筒部23に形成されるキャップ内ネジ54とは、中栓12を支持部としてのキャップ円筒部23から引き抜くよりも中栓12を支持部としてのキャップ円筒部23に押し込むことを容易にするかえり形状の突起となっている。具体的には、図3に示すように、第2締結部50bを構成する雌ネジである中栓内ネジ52は、ネジ軸AXを通る図示のような断面において、先端側又は内側で本体10のネジ軸AXに沿ったねじ戻し方向又は反螺進方向(下側)に偏った断面形状を有するネジ山となっている。見方を変えれば、中栓内ネジ52は、中栓12を上方に変位させる際のキャップ内ネジ54との反螺進側の係合面であるネジ山下面52bが水平に近い角度(角度θ1)に形成され、基部の厚み(H1a)よりも先端部の厚み(H1b)が薄く設定されている。つまり、中栓内ネジ52は、螺進側の係合面であるネジ山上面52tが、反螺進側の係合面であるネジ山下面52bよりも少なく傾斜(角度φ1<θ1)するものとなっている。一方、第2締結部50bを構成する雄ネジであるキャップ内ネジ54は、ネジ軸AXを通る図示のような断面において、先端側又は外側で本体10のネジ軸AXに沿ったねじ戻し方向又は反螺進方向(上側)に偏った断面形状を有するネジ山となっている。見方を変えれば、キャップ内ネジ54は、中栓12を上方に変位させる際の中栓内ネジ52との反螺進側の係合面であるネジ山上面54tが水平に近い角度(角度θ2)に形成され、基部の厚み(H2a)よりも先端部の厚み(H2b)が薄く設定されている。つまり、キャップ内ネジ54は、螺進側の係合面であるネジ山下面54bが、反螺進側の係合面であるネジ山上面54tよりも少なく傾斜(角度φ2<θ2)するものとなっている。以上から明らかなように、本体10の中栓円筒部42に設けた中栓内ネジ52と、キャップ20のキャップ円筒部23に設けたキャップ内ネジ54とは、縦断面において点対称的に形成されている。なお、中栓内ネジ52のネジ山下面52bの角度θ1やキャップ内ネジ54のネジ山上面54tの角度θ2は90°を超える場合もある。 The second fastening portion 50b, that is, the inner plug inner screw 52 formed on the inner plug 12 of the main body 10, and the inner cap screw 54 formed on the cap cylindrical portion 23 of the cap 20 that meshes with the inner plug 12 It is a burr-shaped protrusion that makes it easier to push the inner plug 12 into the cap cylindrical portion 23 as the support portion rather than pulling it out from the cap cylindrical portion 23 as the support portion. Specifically, as shown in FIG. 3, the inner plug internal screw 52, which is a female screw constituting the second fastening portion 50b, has a main body 10 on the tip side or the inside in a cross section as shown in the drawing passing through the screw shaft AX. The screw thread has a cross-sectional shape that is biased in the screw-back direction or the counter-screw-advancing direction (lower side) along the screw shaft AX. From a different point of view, the inner plug internal screw 52 has an angle (angle θ1) close to horizontal with the thread lower surface 52b, which is the engaging surface on the counter-threading side with the inner plug screw 54 when the inner plug 12 is displaced upward. ), And the thickness of the tip portion (H1b) is set thinner than the thickness of the base portion (H1a). That is, the inner plug internal screw 52 has a thread upper surface 52t, which is an engaging surface on the screwing side, inclined less than a thread lower surface 52b, which is an engaging surface on the anti-screw side (angle φ1 <θ1). It has become. On the other hand, the cap inner screw 54, which is a male screw constituting the second fastening portion 50b, has a screw-back direction or a screw-back direction along the screw shaft AX of the main body 10 on the tip side or the outer side in a cross section as shown through the screw shaft AX. It is a thread having a cross-sectional shape that is biased in the anti-screw direction (upper side). From a different point of view, the cap internal screw 54 has an angle (angle θ2) at which the thread upper surface 54t, which is the engaging surface on the counter-threading side with the internal plug internal screw 52 when the inner plug 12 is displaced upward, is close to horizontal. ), And the thickness of the tip portion (H2b) is set thinner than the thickness of the base portion (H2a). That is, in the cap inner screw 54, the lower surface of the screw thread 54b, which is the engaging surface on the screwing side, is inclined less than the upper surface 54t of the thread, which is the engaging surface on the anti-screw side (angle φ2 <θ2). It has become. As is clear from the above, the inner plug inner screw 52 provided on the inner plug cylindrical portion 42 of the main body 10 and the inner cap inner screw 54 provided on the cap cylindrical portion 23 of the cap 20 are formed point-symmetrically in the vertical cross section. Has been done. The angle θ1 of the thread lower surface 52b of the inner plug inner screw 52 and the angle θ2 of the thread upper surface 54t of the cap inner screw 54 may exceed 90 °.

図4に示すように、開封前において本体10にキャップ20を組付けた状態で、第2締結部50bを構成する中栓内ネジ52とキャップ内ネジ54との間には、ネジ軸AXに沿った上下の双方向に関して全体的にクリアランスが設けられている。つまり、中栓内ネジ52のネジ山上面52tと、これに対向するキャップ内ネジ54のネジ山下面54bとは、全周に亘って離間しており、中栓内ネジ52のネジ山下面52bと、これに対向するキャップ内ネジ54のネジ山上面54tとは、全周に亘って離間している。 As shown in FIG. 4, with the cap 20 attached to the main body 10 before opening, a screw shaft AX is formed between the inner plug inner screw 52 and the cap inner screw 54 constituting the second fastening portion 50b. There is an overall clearance for both the top and bottom along the line. That is, the thread upper surface 52t of the inner plug inner screw 52 and the thread lower surface 54b of the cap inner screw 54 facing the thread upper surface 52t are separated from each other over the entire circumference, and the thread lower surface 52b of the inner plug inner screw 52. And the upper surface 54t of the thread of the screw 54 in the cap facing the screw thread 54 are separated from each other over the entire circumference.

第2締結部50bのクリアランスは、上側方向と下側方向とでそれぞれ0mmより大きく、1.0mm以下となっている。具体的には、第2締結部50bのリードが4mmの場合、上下の総クリアランスは2.0mm以下となっている。このときの第2締結部50bの遊び角度については、+10度以上+90度以下及び/又は−90度以上−10度以下となっている。また、第1締結部50aの下側方向のクリアランスは、0.2mm以上1.0mm以下となっていることが好ましい。第2締結部50bの上側方向のクリアランスは、第1締結部50aの下側方向のクリアランスより少なく、かつ0.8mm以下となっていることが好ましい。 The clearance of the second fastening portion 50b is larger than 0 mm and 1.0 mm or less in the upper direction and the lower direction, respectively. Specifically, when the lead of the second fastening portion 50b is 4 mm, the total upper and lower clearance is 2.0 mm or less. The play angle of the second fastening portion 50b at this time is +10 degrees or more and +90 degrees or less and / or −90 degrees or more and −10 degrees or less. Further, the clearance in the lower direction of the first fastening portion 50a is preferably 0.2 mm or more and 1.0 mm or less. The clearance in the upper direction of the second fastening portion 50b is preferably smaller than the clearance in the lower direction of the first fastening portion 50a, and is preferably 0.8 mm or less.

図5に示すように、開封前において本体10にキャップ20を組付けた状態で、第2締結部50bを構成する中栓内ネジ52を設けた中栓円筒部42の先端とキャップ20とのネジ軸AX方向に関するクリアランスHは、キャップ20のキャップ天板21から下に延びて中栓円筒部42を周囲から覆う円筒状の外側サポート部24の先端と本体10とのネジ軸AX方向に関するクリアランスd2(最少のクリアランス)よりも大きい。クリアランスHは、例えば薄肉部15の厚みt以上3mm以下となっている。一方、クリアランスd2は、例えば0mm以上0.5mm以下となっている。 As shown in FIG. 5, with the cap 20 attached to the main body 10 before opening, the tip of the inner plug cylindrical portion 42 provided with the inner plug inner screw 52 constituting the second fastening portion 50b and the cap 20 The clearance H related to the screw shaft AX direction is the clearance H related to the screw shaft AX direction between the tip of the cylindrical outer support portion 24 that extends downward from the cap top plate 21 of the cap 20 and covers the inner plug cylindrical portion 42 from the periphery and the main body 10. Greater than d2 (minimum clearance). The clearance H is, for example, a thickness t or more and 3 mm or less of the thin portion 15. On the other hand, the clearance d2 is, for example, 0 mm or more and 0.5 mm or less.

また、図6に示すように、外側サポート部24の先端部24dの内周側には、段差状に窪んだバリ受容部であるバリ収納部24rが形成されている。バリ収納部24rの径方向すなわちAB方向の外縁REは、薄肉部15の破断予定箇所RPよりも径方向すなわちAB方向の外側にある。これにより、バリ収納部24rによる破断部15a(図9参照)の収納又は受容がより確実となる。また、バリ収納部24rのネジ軸AX方向に関する段差量hは、本体10の薄肉部15の厚みtよりも大きい。厚みtは、例えば0.05mm以上0.3mm以下である。 Further, as shown in FIG. 6, a burr storage portion 24r, which is a burr receiving portion recessed in a stepped shape, is formed on the inner peripheral side of the tip portion 24d of the outer support portion 24. The outer edge RE in the radial direction, that is, the AB direction of the burr storage portion 24r is outside the radial direction, that is, the AB direction, with respect to the planned fracture portion RP of the thin wall portion 15. As a result, the burr storage portion 24r can more reliably store or receive the broken portion 15a (see FIG. 9). Further, the step amount h of the burr storage portion 24r with respect to the screw shaft AX direction is larger than the thickness t of the thin portion 15 of the main body 10. The thickness t is, for example, 0.05 mm or more and 0.3 mm or less.

図5に示すように、開封前において本体10にキャップ20を組付けた状態で、キャップ円筒部23の先端部23dの外周面23jと中栓円筒部42の根元部42pの内周面42jとは、ネジ軸AXに直交する径方向(図面上で左右方向に対応)に接している。外周面23jと内周面42jとは、周方向に沿って互いに分離する複数の円弧状の箇所で径方向に接していてもよい。また、キャップ円筒部23の根元部23pの外周面23kと中栓円筒部42の先端部42dの内周面42kとは、ネジ軸AXに直交する径方向(図面上で左右方向に対応)に接している。外周面23kと内周面42kとは、周方向に沿って互いに分離する複数の円弧状の箇所で径方向に接していてもよい。さらに、外側サポート部24の先端部24dの内周面24mと中栓円筒部42の根元部42pの外周面42mとは、ネジ軸AXに直交する径方向(図面上で左右方向に対応)に接している。内周面24mと外周面42mとは、周方向に沿って互いに分離する複数の円弧状の箇所で径方向に接していてもよい。 As shown in FIG. 5, with the cap 20 attached to the main body 10 before opening, the outer peripheral surface 23j of the tip portion 23d of the cap cylindrical portion 23 and the inner peripheral surface 42j of the root portion 42p of the inner plug cylindrical portion 42. Is in contact with the radial direction (corresponding to the left-right direction on the drawing) orthogonal to the screw axis AX. The outer peripheral surface 23j and the inner peripheral surface 42j may be in contact with each other in the radial direction at a plurality of arcuate points separated from each other along the circumferential direction. Further, the outer peripheral surface 23k of the root portion 23p of the cap cylindrical portion 23 and the inner peripheral surface 42k of the tip portion 42d of the inner plug cylindrical portion 42 are in the radial direction orthogonal to the screw axis AX (corresponding to the left-right direction on the drawing). I'm in contact. The outer peripheral surface 23k and the inner peripheral surface 42k may be in contact with each other in the radial direction at a plurality of arcuate points separated from each other along the circumferential direction. Further, the inner peripheral surface 24m of the tip portion 24d of the outer support portion 24 and the outer peripheral surface 42m of the root portion 42p of the inner plug cylindrical portion 42 are in the radial direction orthogonal to the screw axis AX (corresponding to the left-right direction on the drawing). I'm in contact. The inner peripheral surface 24 m and the outer peripheral surface 42 m may be in contact with each other in the radial direction at a plurality of arcuate points separated from each other along the circumferential direction.

図1を参照して、封止装置100の組み立て方法の一例について説明する。本体10とキャップ20とは、キャップ20に本体10を収納するようにキャップ20のキャップ外ネジ53に本体10の本体外ネジ51を係合させ、本体10を本体10側から見て時計方向に回転させ或いはキャップ20をキャップ20側から見て時計方向に回転させることによって、第1締結部50aは、ねじ込むように締め付けられ、螺合される。その際、別の箇所に形成された本体10の中栓内ネジ52とキャップ20のキャップ内ネジ54とは、逆ネジに形成されているが、両内ネジ52,54は上述のように押し込みに際して変形し易いかえり形状に形成されているので、互いに変形しながら両内ネジ52,54のネジ山を乗越えて互いに噛合される。この際、外側サポート部24の先端部24dは、薄肉部15の外側の連結部31aの上面に近接又は当接する。 An example of an assembling method of the sealing device 100 will be described with reference to FIG. The main body 10 and the cap 20 engage the main body external screw 51 of the main body 10 with the cap external screw 53 of the cap 20 so that the main body 10 is housed in the cap 20, and the main body 10 is viewed clockwise from the main body 10 side. By rotating or rotating the cap 20 clockwise when viewed from the cap 20 side, the first fastening portion 50a is tightened and screwed so as to be screwed. At that time, the inner plug inner screw 52 of the main body 10 and the cap inner screw 54 of the cap 20 formed at different places are formed as reverse screws, but the both inner screws 52 and 54 are pushed in as described above. Since it is formed in a burr shape that is easily deformed at the time, the screws are engaged with each other over the threads of the internal screws 52 and 54 while being deformed from each other. At this time, the tip portion 24d of the outer support portion 24 comes close to or abuts on the upper surface of the outer connecting portion 31a of the thin-walled portion 15.

このようにして本体10とキャップ20とが互いに係合された状態では、本体10とキャップ20との間隔が調整され、中栓内ネジ52とキャップ内ネジ54との間には、ネジ軸AXに沿った上下の双方向に関して全体的にクリアランスが設けられている(図4参照)。さらに、このような開封前の係合状態では、図1等に示すように、外側サポート部24とキャップ円筒部23との基部に形成される凹部Eに、中栓円筒部42の先端部42dが収容される。また、本体外周壁31の先端に形成されたリップ部31bがキャップ20のキャップ天板21の下面21tに当接した状態に位置される。本体10とキャップ20とを正規の位置に巻き締めた状態において、中栓円筒部42の先端部42dとキャップ20のキャップ天板21との間には上記クリアランスHに対応する隙間Gが形成されている。隙間Gを有することにより、後述する開封動作において、第2締結部50bの中栓内ネジ52とキャップ内ネジ54とが螺合し、中栓12を引き上げる力が働き、薄肉部15が破断するまでの間に、中栓12がキャップ20のキャップ天板21方向に移動する。つまり、薄肉部15の一対の破断面が上下方向にずれることになる。これにより、中栓12を分離した後のキャップ20を再度閉めても当該破断面が触れ合うことがない。そのため、破断面同士が擦れることによる破断面付近の薄肉のバリの剥がれを防ぐことができる。また、中栓12自体が緩んでキャップ20から外れることを防ぐことができる。 In the state where the main body 10 and the cap 20 are engaged with each other in this way, the distance between the main body 10 and the cap 20 is adjusted, and the screw shaft AX is inserted between the inner plug inner screw 52 and the cap inner screw 54. There is an overall clearance for both the upper and lower directions along the line (see FIG. 4). Further, in such an engaged state before opening, as shown in FIG. 1 and the like, the tip portion 42d of the inner plug cylindrical portion 42 is formed in the recess E formed at the base of the outer support portion 24 and the cap cylindrical portion 23. Is housed. Further, the lip portion 31b formed at the tip of the outer peripheral wall 31 of the main body is positioned in a state of being in contact with the lower surface 21t of the cap top plate 21 of the cap 20. In a state where the main body 10 and the cap 20 are wound in a proper position, a gap G corresponding to the clearance H is formed between the tip portion 42d of the inner plug cylindrical portion 42 and the cap top plate 21 of the cap 20. ing. By having the gap G, in the opening operation described later, the inner plug inner screw 52 and the inner cap inner screw 54 of the second fastening portion 50b are screwed together, a force for pulling up the inner plug 12 works, and the thin portion 15 is broken. In the meantime, the inner plug 12 moves toward the cap top plate 21 of the cap 20. That is, the pair of fracture surfaces of the thin portion 15 are displaced in the vertical direction. As a result, even if the cap 20 after separating the inner plug 12 is closed again, the fracture surface does not come into contact with each other. Therefore, it is possible to prevent the thin-walled burrs in the vicinity of the fracture surface from peeling off due to rubbing against each other. Further, it is possible to prevent the inner plug 12 itself from loosening and coming off from the cap 20.

上述のようにして組立てられた封止装置100(本体10及びキャップ20)は、図1に示すように、紙パック等の容器2の孔2aに裏側から挿入され、その孔2aの内周面に本体10の本体台座32の外周面が嵌合され、超音波接着や接着剤による接着等によって容器2に接合される。 As shown in FIG. 1, the sealing device 100 (main body 10 and cap 20) assembled as described above is inserted into the hole 2a of the container 2 such as a paper carton from the back side, and the inner peripheral surface of the hole 2a is inserted. The outer peripheral surface of the main body pedestal 32 of the main body 10 is fitted to the container 2 and joined to the container 2 by ultrasonic bonding, adhesive bonding, or the like.

以下、上記実施形態の封止装置100の開封動作について、図1、図7〜図10等を参照しながら説明する。 Hereinafter, the opening operation of the sealing device 100 of the above embodiment will be described with reference to FIGS. 1, 7 to 10, and the like.

まず、図1に示すように、キャップ20が第1及び第2締結部50a,50bの回転動作前の基準位置又は初期位置(奥までねじ込んだ状態)にあり、中栓12と本体外周壁31とが結合状態にあって、容器2の開口部11aが封止された状態にある。 First, as shown in FIG. 1, the cap 20 is in the reference position or the initial position (in a state of being screwed in) before the rotation operation of the first and second fastening portions 50a and 50b, and the inner plug 12 and the outer peripheral wall 31 of the main body 31. Is in a bonded state, and the opening 11a of the container 2 is in a sealed state.

図7に示すように、図1の状態からキャップ20を緩める方向、即ち反時計回りに回転させると、キャップ20は所定の回転角度分空回りし、その間に中栓内ネジ52のネジ山下面52bとキャップ内ネジ54のネジ山上面54tが当接する。更にキャップ20を反時計回りに回転させると、図8に示すように、キャップ外ネジ53が本体外ネジ51に当接する。この時、中栓12は、キャップ20と逆ネジによって螺合されているので、第2締結部50bの締め付けが開始され、中栓12が上方に移動させられ、それに伴い薄肉部15が上方に伸ばされる。つまり、第2締結部50bの締め付けが若干進行し、中栓12は、外周部11に対して上から見て反時計回りに回転しながら上方に移動させられる。更にキャップ20を反時計回りに回転させると、キャップ外ネジ53と本体外ネジ51の螺合によりキャップ20は上方に移動し、その間に本体10の薄肉部15が更に伸びて破断されて、図9に示すように、中栓12は本体外周壁31から離脱され、開封される。 As shown in FIG. 7, when the cap 20 is rotated in the direction of loosening the cap 20 from the state of FIG. 1, that is, counterclockwise, the cap 20 idles by a predetermined rotation angle, and during that time, the screw thread lower surface 52b of the inner plug internal screw 52 And the upper surface 54t of the thread of the screw 54 in the cap come into contact with each other. When the cap 20 is further rotated counterclockwise, the cap external screw 53 comes into contact with the main body external screw 51, as shown in FIG. At this time, since the inner plug 12 is screwed with the cap 20 by the reverse screw, the tightening of the second fastening portion 50b is started, the inner plug 12 is moved upward, and the thin-walled portion 15 is moved upward accordingly. Stretched. That is, the tightening of the second fastening portion 50b progresses slightly, and the inner plug 12 is moved upward while rotating counterclockwise with respect to the outer peripheral portion 11. Further, when the cap 20 is rotated counterclockwise, the cap 20 is moved upward by the screwing of the cap external screw 53 and the main body external screw 51, and during that time, the thin portion 15 of the main body 10 is further extended and broken. As shown in 9, the inner plug 12 is separated from the outer peripheral wall 31 of the main body and opened.

この状態においては、中栓12は、図9に示すように、中栓12のキャップ内ネジ54のネジ山上面54tが中栓円筒部42の中栓内ネジ52のネジ山下面52bに当接するとともに、中栓円筒部42の先端部42dが凹部Eにおいてキャップ天板21の下面21tに近接又は当接し、それによって螺合による係止状態が維持され、キャップ20に保持される。さらに、薄肉部15の中栓12側の破断部15bは、バリ収納部24rに全体的に収納されて凹所にあり、連結部31a側の破断部15aと触れ合うことが回避される。 In this state, as shown in FIG. 9, in the inner plug 12, the thread upper surface 54t of the cap inner screw 54 of the inner plug 12 comes into contact with the thread lower surface 52b of the inner plug inner screw 52 of the inner plug cylindrical portion 42. At the same time, the tip portion 42d of the inner plug cylindrical portion 42 approaches or abuts on the lower surface 21t of the cap top plate 21 in the recess E, whereby the locked state by screwing is maintained and held by the cap 20. Further, the broken portion 15b on the inner plug 12 side of the thin-walled portion 15 is entirely housed in the burr storage portion 24r and is in a recess, so that it is avoided from coming into contact with the broken portion 15a on the connecting portion 31a side.

さらに、キャップ20を緩める方向に回転させると、キャップ20は本体外周壁31から離れ、それによって容器2内の内容物を注ぐことができるようになる。その際、中栓12は、キャップ20に確保されキャップ20に対してある程度締め付けられた状態となっているので、離脱するおそれはない。つまり、一旦開封が行われた後は、本体10側に固定されていた中栓12がキャップ20側に固定されることになる。 Further, when the cap 20 is rotated in the loosening direction, the cap 20 is separated from the outer peripheral wall 31 of the main body, whereby the contents in the container 2 can be poured. At that time, since the inner plug 12 is secured by the cap 20 and is in a state of being tightened to some extent with respect to the cap 20, there is no possibility of detachment. That is, once the package is opened, the inner plug 12 fixed to the main body 10 side is fixed to the cap 20 side.

図10を参照して開封後について説明すると、キャップ20のキャップ外ネジ53を本体10の本体外ネジ51に螺合させ、キャップ20を時計方向に回転させると、本体外周壁31の上端に形成されているリップ部31bがキャップ20のキャップ天板21の下面21tに当接し、かつ、外側サポート部24の先端部24dが薄肉部15の外側面に密着する。中栓12はキャップ20のキャップ天板21の方向に引き上げられているため、薄肉部15の破断面は、上下にずれていて互いに触れ合わない。また、キャップ20を締め込んでも、中栓12側の破断部15bがバリ収納部24rに全体的に収納されており、かつ、外側サポート部24の先端部24dが薄肉部15の外側面に当たるため、中栓12側の破断部15bと外周部11側の破断部15aとが触れることはない。 Explaining after opening with reference to FIG. 10, when the cap outer screw 53 of the cap 20 is screwed into the main body external screw 51 of the main body 10 and the cap 20 is rotated clockwise, it is formed at the upper end of the main body outer peripheral wall 31. The lip portion 31b is in contact with the lower surface 21t of the cap top plate 21 of the cap 20, and the tip portion 24d of the outer support portion 24 is in close contact with the outer surface of the thin portion 15. Since the inner plug 12 is pulled up in the direction of the cap top plate 21 of the cap 20, the fracture surface of the thin-walled portion 15 is displaced vertically and does not touch each other. Further, even when the cap 20 is tightened, the broken portion 15b on the inner plug 12 side is entirely housed in the burr storage portion 24r, and the tip portion 24d of the outer support portion 24 hits the outer surface of the thin-walled portion 15. , The broken portion 15b on the inner plug 12 side and the broken portion 15a on the outer peripheral portion 11 side do not come into contact with each other.

以上説明した容器の封止装置によれば、開封前において本体10にキャップ20を組付けた状態で第2締結部50bを構成するキャップ内ネジ54と中栓内ネジ52との間にネジ軸AXに沿った上下の双方向に関して全体的にクリアランスが設けられているので、開封前に中栓12と本体10の外周側、すなわち外周部11との間に形成された切断予定部分である薄肉部15に過度の力がかかることを防止して、薄肉部15の意図しない破断を生じにくくすることができる。 According to the container sealing device described above, a screw shaft is formed between the cap inner screw 54 and the inner plug inner screw 52 constituting the second fastening portion 50b with the cap 20 attached to the main body 10 before opening. Since a clearance is provided as a whole in both the upper and lower directions along the AX, a thin wall is formed between the inner plug 12 and the outer peripheral side of the main body 10, that is, the outer peripheral portion 11 before opening. It is possible to prevent an excessive force from being applied to the portion 15 and prevent the thin portion 15 from being unintentionally broken.

以上、本実施形態に係る封止装置について説明したが、本発明に係る封止装置は上記のものには限られない。例えば、上記実施形態において、第1締結部50aを構成している本体外ネジ51及びキャップ外ネジ53のピッチ、巻き数、ネジ山高さ等の仕様は、適宜用途に応じて変更することができる。また、第2締結部50bを構成しているキャップ内ネジ54及び中栓内ネジ52のピッチ、巻き数、ネジ山高さ等の仕様も、適宜用途に応じて変更することができる。 Although the sealing device according to the present embodiment has been described above, the sealing device according to the present invention is not limited to the above. For example, in the above embodiment, specifications such as the pitch, number of turns, and thread height of the main body external screw 51 and the cap external screw 53 constituting the first fastening portion 50a can be appropriately changed according to the intended use. .. Further, the specifications such as the pitch, the number of turns, and the thread height of the cap inner screw 54 and the inner plug inner screw 52 constituting the second fastening portion 50b can be changed as appropriate according to the application.

また、上記実施形態において、キャップ20の外側サポート部24については、これを省略することもできる。 Further, in the above embodiment, the outer support portion 24 of the cap 20 may be omitted.

また、上記実施形態において、本体10の中栓円筒部42とキャップ20のキャップ円筒部23とは、内外を入れ替えることもできる。この場合も、中栓円筒部42の雄ネジとキャップ円筒部23の雌ネジとは、第1締結部50aに対して逆の螺進関係の第2締結部50bを構成する。 Further, in the above embodiment, the inside and outside of the inner plug cylindrical portion 42 of the main body 10 and the cap cylindrical portion 23 of the cap 20 can be exchanged. Also in this case, the male screw of the inner plug cylindrical portion 42 and the female screw of the cap cylindrical portion 23 form a second fastening portion 50b having a screwing relationship opposite to that of the first fastening portion 50a.

上記実施形態において、第2締結部50bを構成する中栓内ネジ52及びキャップ内ネジ54の形状は、図1等に例示するものに限らず、押し込むことを容易にするかえり形状を有するネジ山であればよく、様々な断面形状とできる。また、第2締結部50bを構成する中栓内ネジ52やキャップ内ネジ54は、連続的に螺旋状に形成されるものに限らず、分離した複数の部分からなるものとできる。 In the above embodiment, the shapes of the inner plug inner screw 52 and the cap inner screw 54 constituting the second fastening portion 50b are not limited to those illustrated in FIG. 1 and the like, and are screw threads having a burr shape that facilitates pushing. Anything is sufficient, and various cross-sectional shapes can be obtained. Further, the inner plug inner screw 52 and the cap inner screw 54 constituting the second fastening portion 50b are not limited to those formed continuously in a spiral shape, and may be composed of a plurality of separated parts.

上記実施形態において、外側サポート部24の先端部24dには、段差状に窪んだバリ収納部24rが形成されているが、図11に示すように、段差状の窪みを設けず、平坦な面としてもよい。この場合、先端部24dは薄肉部15に当接しない構成とすることが好ましい。また、外側サポート部24の先端と本体10とのネジ軸AX方向に関するクリアランスd2は、本体10の薄肉部15の厚みtよりも大きい。 In the above embodiment, the tip portion 24d of the outer support portion 24 is formed with a burr storage portion 24r recessed in a stepped shape, but as shown in FIG. 11, a flat surface without a stepped recess is provided. May be. In this case, it is preferable that the tip portion 24d does not come into contact with the thin-walled portion 15. Further, the clearance d2 between the tip of the outer support portion 24 and the main body 10 in the screw shaft AX direction is larger than the thickness t of the thin portion 15 of the main body 10.

上記実施形態において、本体10の溶着部33の上面を、容器2の周縁部2bの下面に対して固定したが、溶着部33の下面を、周縁部2bの上面に対して固定してもよい。この場合、本体10の本体台座32と溶着部33とを同じ厚みとし、係止部34を省略してもよい。 In the above embodiment, the upper surface of the welded portion 33 of the main body 10 is fixed to the lower surface of the peripheral edge portion 2b of the container 2, but the lower surface of the welded portion 33 may be fixed to the upper surface of the peripheral edge portion 2b. .. In this case, the main body pedestal 32 of the main body 10 and the welded portion 33 may have the same thickness, and the locking portion 34 may be omitted.

2…容器、 2a…孔、 2b…周縁部、 10…本体、 11…外周部、 11a…開口部、 12…中栓、 15…薄肉部、 16…スコアー、 17…外周側境界部、 20…キャップ、 21…キャップ天板、 22…キャップ外周壁、 23…キャップ円筒部、 23d…先端部、 24…外側サポート部、 24d…先端部、 24r…バリ収納部、 25…インナーリング、 31…本体外周壁、 31a…連結部、 31b…リップ部、 32…本体台座、 33…溶着部、 34…係止部、 41…封止体、 42…中栓円筒部、 42d…先端部、 50a…第1締結部、 50b…第2締結部、 51…本体外ネジ、 52…中栓内ネジ、 53…キャップ外ネジ、 54…キャップ内ネジ、 100…封止装置、 AX…ネジ軸 2 ... container, 2a ... hole, 2b ... peripheral edge, 10 ... main body, 11 ... outer peripheral part, 11a ... opening, 12 ... inner plug, 15 ... thin wall part, 16 ... score, 17 ... outer peripheral side boundary, 20 ... Cap, 21 ... Cap top plate, 22 ... Cap outer wall, 23 ... Cap cylindrical part, 23d ... Tip part, 24 ... Outer support part, 24d ... Tip part, 24r ... Burr storage part, 25 ... Inner ring, 31 ... Main body Outer wall, 31a ... Connecting part, 31b ... Lip part, 32 ... Main body pedestal, 33 ... Welding part, 34 ... Locking part, 41 ... Sealing body, 42 ... Inner plug cylindrical part, 42d ... Tip part, 50a ... No. 1 Fastening part, 50b ... 2nd fastening part, 51 ... Main body external screw, 52 ... Inner plug internal screw, 53 ... Cap external screw, 54 ... Cap internal screw, 100 ... Sealing device, AX ... Screw shaft

Claims (7)

本体とキャップとを備え、前記本体と前記キャップとの間に設けられた正ネジタイプの第1締結部によって、前記キャップの着脱を可能にするとともに、前記第1締結部よりも内側において前記本体と前記キャップとの間に設けられた逆ネジタイプの第2締結部によって、開封に際して前記本体から中栓を分離して前記キャップに捕捉させる封止装置であって、
開封前において前記本体に前記キャップを組付けた状態で、前記第2締結部を構成するキャップ内ネジと中栓内ネジとの間には、ネジ軸に沿った上下方向に関して対向するネジ山間の全体にクリアランスが設けられている、封止装置。
The main body and the cap are provided, and the cap can be attached and detached by the positive screw type first fastening portion provided between the main body and the cap, and the main body is inside the first fastening portion. A sealing device that separates the inner plug from the main body and captures it on the cap by a reverse screw type second fastening portion provided between the cap and the cap.
With the cap assembled to the main body before opening, between the cap inner screw and the inner plug inner screw constituting the second fastening portion, there are threads facing each other in the vertical direction along the screw shaft. A sealing device with a clearance throughout.
前記キャップ内ネジは、前記キャップの天板から下に延びるキャップ円筒部の外側面に形成され、前記中栓内ネジは、前記中栓の封止体の外縁から上に延びる中栓円筒部の内側面に形成されている、請求項1に記載の封止装置。 The cap inner screw is formed on the outer surface of the cap cylindrical portion extending downward from the top plate of the cap, and the inner plug inner screw is an inner plug cylindrical portion extending upward from the outer edge of the sealing body of the inner plug. The sealing device according to claim 1, which is formed on an inner surface. 前記中栓と前記本体の外周部との間に、薄肉部を有する、請求項1及び2のいずれか一項に記載の封止装置。 The sealing device according to any one of claims 1 and 2, which has a thin-walled portion between the inner plug and the outer peripheral portion of the main body. 前記キャップ円筒部の先端部の外周面と前記中栓円筒部の根元部の内周面とは、径方向に接している、請求項2及び3のいずれか一項に記載の封止装置。 The sealing device according to any one of claims 2 and 3, wherein the outer peripheral surface of the tip end portion of the cap cylindrical portion and the inner peripheral surface of the root portion of the inner plug cylindrical portion are in contact with each other in the radial direction. 前記キャップ円筒部の根元部の外周面と前記中栓円筒部の先端部の内周面とは、径方向に接している、請求項2〜4のいずれか一項に記載の封止装置。 The sealing device according to any one of claims 2 to 4, wherein the outer peripheral surface of the root portion of the cap cylindrical portion and the inner peripheral surface of the tip end portion of the inner plug cylindrical portion are in contact with each other in the radial direction. 前記キャップの天板から下に延びて前記中栓円筒部を周囲から覆う円筒状の外側サポート部をさらに備え、
前記外側サポート部の先端部の内周面と前記中栓円筒部の根元部の外周面とは、径方向に接している、請求項2〜5のいずれか一項に記載の封止装置。
Further provided with a cylindrical outer support portion extending downward from the top plate of the cap and covering the inner plug cylindrical portion from the periphery.
The sealing device according to any one of claims 2 to 5, wherein the inner peripheral surface of the tip end portion of the outer support portion and the outer peripheral surface of the root portion of the inner plug cylindrical portion are in contact with each other in the radial direction.
前記キャップ内ネジと前記中栓内ネジとは、前記中栓を前記キャップ側の支持部から引き抜くよりも前記中栓を前記支持部に押し込むことを容易にするかえり形状を有する、請求項1〜6のいずれか一項に記載の封止装置。 The cap inner screw and the inner plug inner screw have a burr shape that facilitates pushing the inner plug into the support portion rather than pulling out the inner plug from the support portion on the cap side. 6. The sealing device according to any one of 6.
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