JP2004268963A - Cap with seal ring - Google Patents

Cap with seal ring Download PDF

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Publication number
JP2004268963A
JP2004268963A JP2003061088A JP2003061088A JP2004268963A JP 2004268963 A JP2004268963 A JP 2004268963A JP 2003061088 A JP2003061088 A JP 2003061088A JP 2003061088 A JP2003061088 A JP 2003061088A JP 2004268963 A JP2004268963 A JP 2004268963A
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JP
Japan
Prior art keywords
cap
sealing ring
seal ring
locking
bottle
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
JP2003061088A
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Japanese (ja)
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JP4296800B2 (en
Inventor
Takashi Saito
剛史 齋藤
Norio Hayashida
徳生 林田
Kiyoshi Wada
潔 和田
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.)
Toppan Inc
Original Assignee
Toppan Printing 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 Toppan Printing Co Ltd filed Critical Toppan Printing Co Ltd
Priority to JP2003061088A priority Critical patent/JP4296800B2/en
Publication of JP2004268963A publication Critical patent/JP2004268963A/en
Application granted granted Critical
Publication of JP4296800B2 publication Critical patent/JP4296800B2/en
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Expired - Fee Related legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a cap with a seal ring in which a thin weak connecting zone for connecting a cap body with the seal ring is easily completely cut off, and capping properties in a filling process is good, and an amount of a resin can be reduced. <P>SOLUTION: In the cap with the seal ring, the seal ring 200 is connected to the lower end of a peripheral wall of a cap body 100 through a plurality of thin weak connecting belt 101, and a plurality of hooking flaps 230 are projected on the inner peripheral face of the seal ring. The hooking flaps are connected with a plurality of root parts 210 projected on the inner peripheral face of the seal ring through the thin bending part 220. A fixed plate 240 is projected upward by an acute angle to an extension line of the upper face on the upper end of an apex vertical hooking face 231, and the apex of the fixed plate is press contacted with the inner peripheral face of the seal ring when it is screwed on an opening neck part of a bottle and the hooking flaps are bent upward from the thin bending part and hooked. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、飲料などの液体内容物を充填したプラスチックボトルの口頸部に螺合して装着する封緘リング付キャップに関するものである。
【0002】
【従来の技術】
従来、飲料などの液体内容物を充填した例えばPETボトル(ポリエチレンテレフタレートを二軸延伸ブロー成形したボトル)などのプラスチックボトルの口頸部には、使用するまでのバージン性を確保するために、図2に示すキャップ本体(100)の周壁(120)の下端に、複数個の薄肉脆弱接続帯(101)で封緘リング(200)を接続する封緘リング付キャップが螺着されていた。この封緘リング付キャップを口頸部に螺着したボトルは、内容物を使用するため開封するときには、キャップ本体を螺脱方向へ強く回転させて、キャップ本体の下端の封緘リングを接続する複数個の薄肉脆弱接続帯を切断して、ボトルの口頸部からキャップ本体を螺脱して開封していた。
【0003】
封緘リングの構造は、例えば図3(a)に示すように、封緘リング(200)の下方内周面に、周方向へ複数個の根元部(210)を突設し、この根元部に薄肉折曲部(220)を介して、係止フラップ(230)をほぼ水平に中心方向へ接続し、係止フラップの先端にほぼ垂直な係止面(231)を形成し、この係止面の上端に、上面の延長線上にガイド板(250)を突設したものであり、図3(b)に示すように、ボトル(20)の口頸部(21)に封緘リング付キャップが螺着されたときに、ガイド板(250)の先端がボトルの口頸部に設けられたガイド係止リング(22)の下方開きに傾斜するガイド外周面(22a)に接触して、係止フラップ(230)が薄肉折曲部(220)を支線として折れ曲がり、ガイド係止リングの下周面の係止面(22b)に係止フラップの先端の係止面(231)が押圧されながら安定した位置に係止し、封緘リング(200)がボトルの口頸部に固定されるものであった(例えば、特許文献1参照)。
【0004】
【特許文献1】
特開平10−324353号公報
【0005】
【発明が解決しようとする課題】
しかしながら、上述の従来の封緘リング付キャップを口頸部に螺着したボトルを開封するときに、キャップの封緘リングの内周面の根元部と係止フラップを接続する薄肉折曲部付近の剛性力が弱い場合、係止フラップが薄厚で剛性力が弱い場合、または、キャップの係止フラップの係止面の下端やボトルのガイド係止リングの係止面の外周端のエッジが出ていない場合には、キャップの係止フラップの係止面とボトルのガイド係止リングの係止面との係止力が弱く、キャップの封緘リングのボトルの口頸部との固定力が弱くなって、キャップ本体を螺脱方向へ回転したときに、キャップ本体と封緘リングとを接続する薄肉脆弱接続帯が切断されずに、キャップ本体と一緒に封緘リングも回転してしまうことがあった。なお、薄肉折曲部付近の剛性力を強くし過ぎると、充填工程においてキャップをボトルの口頸部に螺着するときに、強い締めトルクが必要となり、キャッピングの作業性が著しく悪くなった。
【0006】
本発明は、上述の従来の封緘リング付キャップの問題を解決したものであり、ボトルの口頸部に螺着された封緘リング付キャップのキャップ本体を螺脱方向へ回転したときに、キャップ本体と封緘リングとを接続する薄肉脆弱接続帯が完全に切断されやすく、充填工程におけるキャッピング性が良好で、また、使用樹脂量の削減が可能な封緘リング付キャップを提供するものである。
【0007】
【課題を解決するための手段】
すなわち、本発明は、キャップ本体の周壁の下端に、複数個の薄肉脆弱接続帯を介して、封緘リングが接続し、この封緘リングの内周面に、複数個の係止フラップが中心方向へ突設する封緘リング付キャップにおいて、前記係止フラップが、前記封緘リングの内周面に突設する複数個の根元部に薄肉折曲部を介して接続し、先端の垂直な係止面の上端に、上面の延長線に対して鋭角に上方へ固定板を突設し、かつ、前記固定板の先端が、ボトルの口頸部に螺着され係止フラップが前記薄肉折曲部から上方へ折り曲げられて前記ボトルの口頸部に係止したときに、封緘リングの内周面に圧接することを特徴とする封緘リング付キャップである。
【0008】
【発明の実施の形態】
次に、本発明の封緘リング付キャップを一実施形態に基づいて、図を用いてに詳細に説明する。
本実施形態の封緘リング付キャップ(10)は、図2に示すように、キャップ本体(100)の周壁(120)の下端に、内周面に係止フラップを有する封緘リング(200)を薄肉脆弱接続帯(101)を介して接続するキャップであり、口頸部の外周面に雄ネジとその雄ネジの下方に、図1(b)に示すガイド係止リング(22)をもつプラスチックボトル(20)に螺着して使用するものである。なお、本実施形態の封緘リング付キャップは、低密度ポリエチレンなどの薄肉脆弱接続帯が指で切断可能な熱可塑性樹脂を用いて、射出成形法により作製されるものである。
【0009】
本実施形態の封緘リング付キャップの封緘リングの構造は、図1(a)に示すように、封緘リング(200)の下方内周面の周方向に等間隔に突設する複数個の根元部(210)に、係止フラップ(230)を薄肉折曲部(220)を介して接続するものである。係止フラップは、先端にボトルの口頸部に係止する垂直な係止面(231)をもち、この係止面の上端に、係止フラップの上面の延長線に対して鋭角な角度をもつ固定板(240)を上方へ突設するものである。そして、この固定板(240)は、図1(b)に示すように、ボトル(20)の口頸部(21)に螺着され係止フラップ(230)が薄肉折曲部(220)から上方へ折り曲げられてボトルの口頸部のガイド係止リング(22)に係止したときに、先端が、封緘リング(200)の内周面に圧接するように、角度及び長さを定めて設けるものである。
【0010】
本実施形態の封緘リング付キャップは、ボトルの口頸部に螺着されるときに、係止フラップの下面が、図1(b)に示すボトル(20)の口頸部(21)に設けられたガイド係止リング(22)の下方開きに傾斜するガイド外周面(22a)に接触して、図1(b)に示すように、係止フラップ(230)が薄肉折曲部(220)を支線として折れ曲がり、ガイド係止リングの下周面の係止面(22b)に係止フラップの先端の係止面(231)が係止すると同時に、固定板(240)の先端が、封緘リング(200)の内周面に圧接するため、固定板と係止フラップと薄肉折曲部付近の総合した剛性による押圧によって、係止フラップの係止面がガイド係止リングの係止面にしっかり安定して係止する。このため、封緘リングがボトルの口頸部にしっかり固定され、キャップ本体を螺脱方向へ回転したときに、キャップ本体の周壁下端と封緘リングの上端と接続する複数個の薄肉脆弱接続帯が完全に切断される。また、従来の封緘リング付キャップのように、係止フラップの厚みを厚くして剛性を強くする必要がなくなり、使用樹脂量の削減が可能となる。また、薄肉折曲部付近の剛性も強くする必要がなくなるので、充填工程におけるキャップのキャッピングの作業がし易くなり、作業性が向上する。
【0011】
【発明の効果】
本発明の封緘リング付キャッピングは、封緘リングの内側に突設する係止フラップの先端の係止面の上端に固定板が上方へ突設され、この固定板の作用効果によって、ボトルの口頸部に螺着されたときに、固定板と係止フラップと薄肉折曲部付近の総合した剛性による押圧によって、封緘リングがしっかりとボトルの口頸部に固定されおり、ボトルを開封するときに、キャップ本体を螺脱方向へ回転すると、キャップ本体と封緘リングとを接続する薄肉脆弱接続帯が完全に切断される。
【0012】
また、本発明の封緘リング付キャッピングは、充填工程におけるキャッピング性が良好であり、また、キャップの使用樹脂量の削減も計れる。
【図面の簡単な説明】
【図1】(a)は、本発明の一実施形態の封緘リング付キャップの封緘リングの構造を示す断面図であり、(b)は、ボトルの口頸部に螺着したときの封緘リングの状態を示す断面図である。
【図2】一例の封緘リング付キャップを、ボトルの口頸部に螺着したときの正面図である。
【図3】(a)は、従来の一例の封緘リング付キャップの封緘リングの構造を示す断面図であり、(b)は、ボトルの口頸部に螺着したときの封緘リングの状態を示す断面図である。
【符号の説明】
10……キャップ
20……ボトル
21……口頸部
22……ガイド係止リング
22a……ガイド外周面
22b,231……係止面
100……キャップ本体
101……薄肉脆弱接続帯
110……天板
120……周壁
200……封緘リング
210……根元部
220……薄肉折曲部
230……係止フラップ
240……固定板
250……ガイド板
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cap with a sealing ring which is screwed and attached to the mouth and neck of a plastic bottle filled with a liquid content such as a beverage.
[0002]
[Prior art]
Conventionally, the mouth and neck of a plastic bottle such as a PET bottle (a bottle obtained by biaxially stretch-blowing polyethylene terephthalate) filled with a liquid content such as a beverage is provided with a diagram to secure virginity before use. At the lower end of the peripheral wall (120) of the cap body (100) shown in FIG. 2, a cap with a sealing ring for connecting the sealing ring (200) with a plurality of thin brittle connection bands (101) was screwed. When the bottle with the cap with a sealing ring screwed onto the mouth and neck is opened to use the contents, the cap body is strongly rotated in the unscrewing direction to connect the sealing ring at the lower end of the cap body. Was cut off, and the cap body was unscrewed from the mouth and neck of the bottle and opened.
[0003]
As shown in FIG. 3 (a), for example, the sealing ring has a plurality of roots (210) projecting circumferentially on the lower inner peripheral surface of the sealing ring (200). The locking flap (230) is connected to the center substantially horizontally through the bent portion (220), and a substantially vertical locking surface (231) is formed at the tip of the locking flap. A guide plate (250) protrudes from the upper end on an extension of the upper surface. As shown in FIG. 3 (b), a cap with a sealing ring is screwed onto the mouth and neck (21) of the bottle (20). The guide plate (250) comes into contact with the guide outer peripheral surface (22a) that is inclined downward and open below the guide locking ring (22) provided on the mouth and neck of the bottle, and the locking flap ( 230) is bent with the thin bent portion (220) as a branch line, and the guide locking ring The locking surface (231) at the tip of the locking flap is locked to a stable position while being pressed against the locking surface (22b) on the peripheral surface, and the sealing ring (200) is fixed to the mouth and neck of the bottle. (For example, see Patent Document 1).
[0004]
[Patent Document 1]
JP-A-10-324353
[Problems to be solved by the invention]
However, when opening the bottle in which the cap with the conventional sealing ring is screwed to the mouth and neck, the rigidity near the thin bent portion connecting the locking flap to the base of the inner peripheral surface of the sealing ring of the cap. When the force is weak, when the locking flap is thin and the rigidity is weak, or when the lower edge of the locking surface of the locking flap of the cap or the outer edge of the locking surface of the guide locking ring of the bottle does not protrude. In this case, the locking force between the locking surface of the locking flap of the cap and the locking surface of the guide locking ring of the bottle is weak, and the fixing force of the sealing ring of the cap to the mouth and neck of the bottle is weak. When the cap body is rotated in the unscrewing direction, the thin brittle connection band connecting the cap body and the sealing ring is not cut, and the sealing ring sometimes rotates together with the cap body. If the rigidity in the vicinity of the thin bent portion is excessively increased, a strong tightening torque is required when the cap is screwed into the mouth and neck of the bottle in the filling step, and the operability of the capping is significantly deteriorated.
[0006]
The present invention solves the above-mentioned problem of the conventional cap with a sealing ring. When the cap body of the cap with a sealing ring screwed to the mouth and neck of the bottle is rotated in the unscrewing direction, the cap body is removed. To provide a cap with a sealing ring capable of easily completely cutting a thin brittle connecting band connecting the sealing ring and the sealing ring, having a good capping property in a filling step, and capable of reducing the amount of resin used.
[0007]
[Means for Solving the Problems]
That is, according to the present invention, a sealing ring is connected to the lower end of the peripheral wall of the cap body through a plurality of thin brittle connection bands, and a plurality of locking flaps are provided on the inner peripheral surface of the sealing ring in the center direction. In the cap with a sealing ring to be protruded, the locking flap is connected to a plurality of roots protruding from the inner peripheral surface of the sealing ring via a thin bent portion, and the locking flap at the tip is provided with a vertical locking surface. At the upper end, a fixing plate protrudes upward at an acute angle with respect to the extension of the upper surface, and the tip of the fixing plate is screwed to the mouth and neck of the bottle, and the locking flap extends upward from the thin bent portion. A cap with a sealing ring, which is pressed against the inner peripheral surface of the sealing ring when it is bent to be locked to the mouth and neck of the bottle.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, a cap with a sealing ring of the present invention will be described in detail based on an embodiment with reference to the drawings.
As shown in FIG. 2, the cap (10) with a sealing ring of the present embodiment has a thin sealing ring (200) having a locking flap on the inner peripheral surface at the lower end of the peripheral wall (120) of the cap body (100). A plastic bottle having a male screw on the outer peripheral surface of the mouth and neck and a guide locking ring (22) shown in FIG. It is used by screwing on (20). The cap with a sealing ring according to the present embodiment is manufactured by an injection molding method using a thermoplastic resin such as a low-density polyethylene, which can cut a thin brittle connection band with a finger.
[0009]
As shown in FIG. 1A, the structure of the sealing ring of the cap with a sealing ring according to the present embodiment includes a plurality of root portions projecting at equal intervals in the circumferential direction of the lower inner peripheral surface of the sealing ring (200). (210) to which a locking flap (230) is connected via a thin bent portion (220). The locking flap has, at its tip, a vertical locking surface (231) for locking to the mouth and neck of the bottle, and the upper end of this locking surface has an acute angle with respect to the extension of the upper surface of the locking flap. The fixing plate (240) is protruded upward. Then, as shown in FIG. 1 (b), the fixing plate (240) is screwed to the mouth and neck portion (21) of the bottle (20) so that the locking flap (230) extends from the thin bent portion (220). The angle and length are determined so that the tip is pressed against the inner peripheral surface of the sealing ring (200) when bent upward and locked on the guide locking ring (22) at the mouth and neck of the bottle. It is provided.
[0010]
In the cap with a sealing ring of this embodiment, when screwed onto the mouth and neck of the bottle, the lower surface of the locking flap is provided on the mouth and neck (21) of the bottle (20) shown in FIG. When the guide flap (230) comes into contact with the outer peripheral surface (22a) of the guide locking ring (22) which is inclined downward and opened, the locking flap (230) is thinly bent (220) as shown in FIG. And the guide surface of the guide locking ring is locked by the locking surface (231) of the locking flap at the same time as the locking surface (231) of the locking flap. (200) is pressed against the inner peripheral surface, so that the fixing plate, the locking flap, and the pressure due to the overall rigidity in the vicinity of the thin bent portion make the locking surface of the locking flap firmly contact the locking surface of the guide locking ring. Locks stably. For this reason, the sealing ring is firmly fixed to the mouth and neck of the bottle, and when the cap body is rotated in the unscrewing direction, a plurality of thin-walled weak connecting bands connecting the lower end of the peripheral wall of the cap body and the upper end of the sealing ring are completely formed. Is cut off. Further, unlike the conventional cap with a sealing ring, it is not necessary to increase the thickness of the locking flap to increase the rigidity, and the amount of resin used can be reduced. Further, since it is not necessary to increase the rigidity in the vicinity of the thin bent portion, the capping operation of the cap in the filling step is facilitated, and the workability is improved.
[0011]
【The invention's effect】
In the capping device with a sealing ring according to the present invention, a fixing plate projects upward from the upper end of a locking surface at the tip of a locking flap protruding inside the sealing ring, and the effect of the fixing plate causes the mouth and neck of the bottle to be closed. When screwed into the part, the sealing ring is firmly fixed to the mouth and neck of the bottle by the fixing plate, the locking flap and the combined rigidity of the vicinity of the thin bent part, and when the bottle is opened. When the cap body is rotated in the unscrewing direction, the thin brittle connection band connecting the cap body and the sealing ring is completely cut.
[0012]
Further, the capping with the sealing ring of the present invention has good capping properties in the filling step, and can reduce the amount of resin used for the cap.
[Brief description of the drawings]
FIG. 1A is a cross-sectional view showing the structure of a sealing ring of a cap with a sealing ring according to an embodiment of the present invention, and FIG. 1B is a sealing ring when screwed onto the mouth and neck of a bottle. It is sectional drawing which shows the state of.
FIG. 2 is a front view when an example of a cap with a sealing ring is screwed to a mouth and neck of a bottle.
FIG. 3A is a cross-sectional view showing the structure of a sealing ring of a conventional cap with a sealing ring, and FIG. 3B shows a state of the sealing ring when screwed onto the mouth and neck of a bottle. FIG.
[Explanation of symbols]
10 Cap 20 Bottle 21 Mouth and neck 22 Guide locking ring 22a Guide outer peripheral surfaces 22b and 231 Locking surface 100 Cap body 101 Thin brittle connection band 110 Top plate 120, peripheral wall 200, sealing ring 210, base portion 220, thin bent portion 230, locking flap 240, fixing plate 250, guide plate

Claims (1)

キャップ本体の周壁の下端に、複数個の薄肉脆弱接続帯を介して、封緘リングが接続し、該封緘リングの内周面に、複数個の係止フラップが中心方向へ突設する封緘リング付キャップにおいて、前記係止フラップが、前記封緘リングの内周面に突設する複数個の根元部に薄肉折曲部を介して接続し、先端の垂直な係止面の上端に、上面の延長線に対して鋭角に上方へ固定板を突設し、かつ、前記固定板の先端が、ボトルの口頸部に螺着され係止フラップが前記薄肉折曲部から上方へ折り曲げられて前記ボトルの口頸部に係止したときに、封緘リングの内周面に圧接することを特徴とする封緘リング付キャップ。A sealing ring is connected to the lower end of the peripheral wall of the cap body via a plurality of thin brittle connection bands, and a plurality of locking flaps are provided on the inner peripheral surface of the sealing ring so as to protrude toward the center. In the cap, the locking flap is connected to a plurality of roots protruding from the inner peripheral surface of the sealing ring via a thin-walled bent portion, and the upper end of the vertical locking surface at the tip is extended with an upper surface. A fixing plate protrudes upward at an acute angle with respect to a line, and a tip of the fixing plate is screwed to a mouth and neck of the bottle, and a locking flap is bent upward from the thin bent portion to form the bottle. A cap with a sealing ring, which is pressed against the inner peripheral surface of the sealing ring when the cap is locked to the mouth and neck.
JP2003061088A 2003-03-07 2003-03-07 Cap with sealing ring Expired - Fee Related JP4296800B2 (en)

Priority Applications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011118551A1 (en) * 2010-03-25 2011-09-29 日本山村硝子株式会社 Synthetic resin pilfer-proof cap

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011118551A1 (en) * 2010-03-25 2011-09-29 日本山村硝子株式会社 Synthetic resin pilfer-proof cap
CN102811921A (en) * 2010-03-25 2012-12-05 日本山村硝子株式会社 Synthetic resin pilfer-proof cap
KR101371812B1 (en) 2010-03-25 2014-03-07 니혼 야마무라가라스 가부시키가이샤 Synthetic resin pilfer-proof cap
CN102811921B (en) * 2010-03-25 2015-07-08 日本山村硝子株式会社 Synthetic resin pilfer-proof cap

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